OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Table 4-6: Predominant Wind Direction IMD Ahmedabad (1961 – 1990)
Predominant Wind
Month
First
Second
Third
Morning
Evening
Morning
Evening
Morning
Evening
January
E
N
NE/ CLAM
NW
N
NE
February
CALM
NW
NE/E
W
NW
NE
March
NW
NW
CALM
W
E
N
April
NW
NW
W
W
CALM
SW
May
W
W
NW
SW
SW
NW
June
SW
SW
W
S
S
W
July
SW
SW
W
W
S
S
August
SW
SW
W
W
NW/CALM
S
September
NW
SW
W
W
SW
NW
October
CALM
CALM
NW
NW
E
N
November
E
CALM
CALM
N
NE
E
December
E
N
NE
E
CALM
NE / NW
Rainfall
The distribution of rainfall in the region, which includes the study area, is uneven. Average rainfall in
the region is 762.7 mm. About 93 percent of the annual rainfall in the region is received during the
southwest monsoon months i.e. June to September. July is the rainiest month.
The annual average rainfall is about 762.7 mm. Maximum rainfall in any one month was recorded in
the month of July in year 1905 which was about 952.5 mm. July is having maximum number of rainy
days i.e. 11.2.
Cloud Cover
The area remains cloudy between June - September, which is the active period of the monsoon
season. During this time all clouds cover is between 4.3 to 6.6 Oktas during day time and 3.9 to 6.3
Oktas during night time.
Humidity
Most humid conditions are found in the monsoons, followed by post-monsoons, winter and summer in
that order. Mornings are more humid than evenings and humidity ranges from a high of 74-87% in
monsoon mornings to a low of 20-45% in summer evenings. During post-monsoon season, in morning
humidity remains between 55-64% and in the evening it remains between 35-37%.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
78
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Table 4-7: Average Meteorological Condition at IMD Ahmedabad (1961 – 1990 )
Mean Daily Temperature
Month
Rainfall
(mm)
Monthly
Total
No. of
Rainy days
Relative
Humidity
(%),
Relative
Humidity
(%),
Max
Min
Morning
Evening
January
28.3
11.9
1.8
0.2
59
32
February
30.9
14.0
1.1
0.1
53
25
March
35.8
18.9
1.0
0.1
49
20
April
39.8
23.5
2.7
0.2
54
20
May
41.7
26.2
15.1
0.7
65
23
June
38.5
27.1
98.7
4.2
74
45
July
33.4
25.6
262.3
11.2
85
67
August
31.9
24.7
239.6
10.8
87
71
September
33.7
24.2
108.9
5.3
82
58
October
36.0
21.0
16.2
0.4
64
37
November
33.1
16.6
11.5
0.6
55
35
December
29.6
13.2
3.8
0.2
60
35
Total
-
-
762.7
34.0
-
-
Average
34.4
20.6
-
-
-
-
4.4.2
Site Specific Meteorology
Baseline meteorological data representing the postmonsoon season 2014 has been collected at at site.
The parameters for which data has been collected are:






Wind Speed
Wind direction
Temperature
Relative Humidity
Cloud Cover
Rain fall
Methodology for Collection of Meteorological Parameters
Hourly meteorological data (wind speed, wind direction, temperature, and relative humidity) were
collected during postmonsoon season 2014 by installing manual meteorological station at site inside
the block area. Cloud cover was collected at interval of four hour. Methodology for meteorological
data collection is given in Table 4-8.
Table 4-8: Monitoring Methodology of Meteorological data
Parameters
Sampling
equipment
Range of
measurement
Wind Speed
Cup Counter
Anemometer
(0 to 65)
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
in m/s
Sensitivity/
Detection Limit
Methodology
0.25 m/s
IS 8829 - 1978
79
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
Parameters
Wind Direction
Temperature
Sampling
equipment
Wind vane
DESCRIPTION OF THE ENVIRONMENT
Range of
measurement
Sensitivity/
Detection Limit
(0° to 357°) degree
with respect to North
direction
1°
Thermometer
(-40° to 60°)
in degree Celsius
Relative Humidity
Relative Humidity
meter
(0 to 99 %)
Cloud Cover
-
-
Methodology
0.1°C
3%
in percent
Visual Inspection by
the observer
-
Baseline Meteorological Data
As per requirement of Terms of Reference, the hourly baseline meteorological data were collected by
setting up meteorological station at in the site area.
Meteorological data shows that mean average wind speed during study period are 2.6 m/s.
Wind rose prepared for study period is shown as Figure 4-1. It can be observed that during study
period wind blows mostly from ENE direction.
Mean average temperature recorded during study period was 28.3°C with mean maximum
temperature of 34.8°C and mean minimum of 22.0°C.
The mean average relative humidity recorded was 34.5% with mean maximum humidity of 42.0% and
mean minimum of 22.2%.
The data obtained during the study period using mechanized meteorological data collection instrument
has then been compiled to obtain average data. Compiled mean meteorological data is represented in
Table 4-9.
Table 4-9: Mean Meteorological Data for Post monsoon season 2014
Time
Temp °C
Humidity %
Wind Speed
(m/sec)
Wind
Direction
Cloud
Cover,
Octas
Rain Fall,
mm
0:00
26.5
36.1
2.7
NNW
0.5
0.0
1:00
25.5
37.7
2.6
NNW
0.4
0.0
2:00
24.6
39.0
2.6
ENE
0.5
0.0
3:00
23.7
40.1
2.7
ENE
0.5
0.0
4:00
23.1
41.2
2.7
ENE
0.5
0.0
5:00
22.5
41.8
2.7
ENE
0.5
0.0
6:00
22.0
42.0
3.0
ENE
0.5
0.0
7:00
22.0
41.0
2.9
ENE
0.4
0.0
8:00
24.1
39.6
3.0
ENE
0.4
0.0
9:00
26.1
38.5
3.2
ENE
0.5
0.0
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
80
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Time
Temp °C
Humidity %
Wind Speed
(m/sec)
Wind
Direction
Cloud
Cover,
Octas
Rain Fall,
mm
10:00
28.5
34.9
3.0
ENE
0.4
0.0
11:00
30.7
31.4
2.9
ENE
0.4
0.0
12:00
32.6
27.3
2.9
ENE
0.5
0.0
13:00
33.8
25.7
2.7
ENE
0.4
0.0
14:00
34.6
23.8
2.5
ENE
0.4
0.0
15:00
34.8
22.2
2.4
ENE
0.5
0.0
16:00
33.8
25.3
2.2
ENE
0.5
0.0
17:00
33.0
28.8
2.1
NE
0.5
0.0
18:00
32.0
31.5
2.0
NE
0.5
0.0
19:00
31.0
32.6
2.0
NE
0.5
0.0
20:00
30.1
33.4
2.1
NE
0.5
0.0
21:00
29.3
33.6
2.5
NW
0.5
0.0
22:00
28.2
34.6
2.4
NW
0.4
0.0
23:00
27.2
35.4
2.5
NNW
0.5
0.0
28.3
34.1
2.6
ENE
0.5
0
Average/
Predominant
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
81
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Figure 4-1: Wind Rose Diagram
NOTE: Frequencies indicate directions from which the wind is blowing.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
82
OIL AND NATURAL GAS CORPORATION
LIMITED
4.5
4.5.1
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Ambient Air Quality
Season and Period for Monitoring
The Ambient Air Quality Monitoring was carried out for Postmonsoon season 2014 as mandated by
ToR issued by EAC (Industry II). Ambient Quality Monitoring was taken at 15 different locations within
the study area.
4.5.2
Selected Sampling Stations
The locations for Ambient Air Quality Monitoring were decided based on the guidelines given in the
EIA manual prepared by MoEF. For this EIA, the purpose is to ascertain the baseline pollutant
concentrations in ambient air. Accordingly, the criterion was selected to ascertain quality of air at
important human settlements (residential areas). Fourteen locations were selected for carrying out
ambient air quality monitoring within study area which are presented in Table 4-10 , Photographs
4-2 and also shown in Map 4.2. (A to C)
Table 4-10: Ambient Air Quality Monitoring Location Details
AAQM
Station
Location
Taluka
District
AA 1
Dheriana
Vav
Banskantha
AA 2
Vav
Vav
Banskantha
AA 3
Bhankhod
Vav
Banskantha
AA 4
Lalpura
Vav
Banskantha
AA 5
Kotarwada
Deodar
Banskantha
AA 6
Paldi
Deodar
Banskantha
AA 7
Nardipur
Kalol
Gandhinagar
AA 8
Soja
Kalol
Gandhinagar
AA 9
Sobhasan
Kalol
Gandhinagar
AA 10
Vagosana
Kalol
Gandhinagar
AA 11
Vasna
Bavla
Ahmedabad
AA 12
Kunavar
Sanand
Ahmedabad
AA 13
Fangdi
Sanand
Ahmedabad
AA 14
Daran
Sanand
Ahmedabad
AA 15
Lodaria
Sanand
Ahmedabad
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
83
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Photographs 4-2: Photographs of AAQ Sampling Stations
4.5.3
AAQ Station at Bhankhod Village
AAQ Station at Kotarwada Village
Grab Sample at Lalpura Village
AAQ Station at Sobhasan Village
AAQ Station at Daran Village
AAQ Station at Fangdi Village
Sampling Frequency
The frequency of monitoring was 24 hrs twice a week at each station spread over the entire season
with gaseous samples being changed six times (at 8-hour intervals).
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
84
OIL AND NATURAL GAS CORPORATION
LIMITED
4.5.4
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Parameters Monitored and Methods Used
The parameters monitored were PM10, Sulphur Dioxide (SO2), Nitrogen Oxides (NOx), Hydrocarbons
and Volatile Organic Compounds (VOCs). These parameters have been selected based on the
guidelines given by the MoEF. The detailed monitoring methodology for ambient air is given in Table
4-11.
Table 4-11: Methodology of Ambient Air Monitoring
Sampling
Parameters
Sampling
equipment
PM10
Respirable Dust
Sampler with
Cyclone & Flow
measurement
Analytical
Equipment
Electronic balance
Sensitivity/Detection
Limit
5 µg/m3
Methodology
Gravimetric IS:
5182
(Part 23) 2006
Guideline for the
measurement of
ambient air
pollutant Volume 1 by CPCB, 2011,
Gravimetric
PM2.5
Fine Particulate
Sampler
Electronic balance
3 µg/m3
SO2
Gaseous Flow
attachment with
RDS Sampler
Spectro
photometer
1.7 µg/m3
Gaseous Flow
attachment with
RDS Sampler
Spectro
photometer
0.5 µg/m3
HC
Grab samples
Gas
Chromatograph
1ppm
As per equipment
manual
VOC
Grab samples
Gas
Chromatograph
1ppm
As per equipment
manual
NOx
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Colorimetric IS:
5182:
(Part II) 2001
Colorimetric IS:
5182:
(Part VI) 2006
85
OIL AND NATURAL GAS CORPORATION LIMITED
4.5.5
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Result of Ambient Air Monitoring
Result of ambient air monitoring are given in Table 4-12
Table 4-12: Ambient Air Monitoring Results
Parameters & Results
Station
code
Location (CPCB Designation)
AA1
Dheriana
(Rural)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
( 8 hours)
VOC
[NS]
Maximum
79
9.6
26.9
2492
395
<1145
<1 ppm
Minimum
41
<8.0
14.2
1957
169
<1145
<1 ppm
AA2
AA3
AA4
Note: All units are in µg/Nm except VOCs, which are in ppm. Figures in brackets indicate CPCB limits.
Minimum Reportable Readings are 8 µg /Nm3 for SO2, 10 µg /Nm3 for NOx, 800µg/Nm3 for THCs, 10
µg /Nm3 for NMHCs, and <1 ppm for VOC
3
CO
Average
64
8.4
21.5
2158
260
<1145
<1 ppm
98%tile
79
9.5
26.3
2468
386
<1145
<1 ppm
Vav
(Rural)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
79
9.9
29.0
4395
585
<1145
<1 ppm
Minimum
42
<8.0
17.7
1951
95
<1145
<1 ppm
Average
67
8.3
24.7
2966
265
<1145
<1 ppm
98%tile
79
9.9
28.7
4306
566
<1145
<1 ppm
Bhankhod Village
(Rural)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
69
9.4
22.5
3226
416
<1145
<1 ppm
Minimum
33
<8.0
14.5
927
178
<1145
<1 ppm
Average
57
8.4
17.6
2498
228
<1145
<1 ppm
98%tile
69
9.3
22.1
3203
409
<1145
<1 ppm
CO
Lalpur Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
( 8 hours)
VOC
[NS]
Maximum
75
9.9
19.9
3608
542
<1145
<1 ppm
Minimum
39
<8.0
10
1007
164
<1145
<1 ppm
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
86
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Parameters & Results
Station
code
AA5
AA6
AA7
AA8
Location (CPCB Designation)
Note: All units are in µg/Nm except VOCs, which are in ppm. Figures in brackets indicate CPCB limits.
Minimum Reportable Readings are 8 µg /Nm3 for SO2, 10 µg /Nm3 for NOx, 800µg/Nm3 for THCs, 10
µg /Nm3 for NMHCs, and <1 ppm for VOC
3
Average
56
8.6
14.6
2423
263
<1145
<1 ppm
98%tile
72
9.9
19.7
3581
520
<1145
<1 ppm
Kotarwada Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
75
9.3
23.9
3274 320
<1145
<1 ppm
Minimum
33
<8.0
11.9
1397
191
<1145
<1 ppm
Average
57
8.3
19.9
2410
182
<1145
<1 ppm
98%tile
75
9.3
23.8
3241
310
<1145
<1 ppm
Paldi Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
74
9.7
21.9
3033
249
<1145
<1 ppm
Minimum
31
<8.0
13.8
1168
106
<1145
<1 ppm
Average
62
8.4
17.8
1960
177
<1145
<1 ppm
98%tile
74
9.7
21.7
2987
245
<1145
<1 ppm
Nardipur Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
78
9.6
23.5
3287
347
<1145
<1 ppm
Minimum
42
<8.0
11.1
1863
139
<1145
<1 ppm
Average
62
8.6
17.0
2273
218
<1145
<1 ppm
98%tile
75
9.6
22.6
3198
336
<1145
<1 ppm
Soja Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
72
9.8
23.9
3615
331
<1145
<1 ppm
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
87
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Parameters & Results
Station
code
AA9
AA10
AA11
Location (CPCB Designation)
Note: All units are in µg/Nm except VOCs, which are in ppm. Figures in brackets indicate CPCB limits.
Minimum Reportable Readings are 8 µg /Nm3 for SO2, 10 µg /Nm3 for NOx, 800µg/Nm3 for THCs, 10
µg /Nm3 for NMHCs, and <1 ppm for VOC
3
Minimum
34
<8.0
10.0
1240
147
<1145
<1 ppm
Average
55
8.5
17.3
2090
227
<1145
<1 ppm
98%tile
71
9.8
23.7
3484
328
<1145
<1 ppm
Sobhasan Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
79
9.8
22.1
3256
374
<1145
<1 ppm
Minimum
32
<8.0
10.0
1893
170
<1145
<1 ppm
Average
60
8.3
17.8
2363
215
<1145
<1 ppm
98%tile
76
9.6
21.9
3201
370
<1145
<1 ppm
Vagosana Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
98
9.9
23.7
3731
445
<1145
<1 ppm
Minimum
43
<8.0
11.8
1413
153
<1145
<1 ppm
Average
81
8.8
17.8
2539
239
<1145
<1 ppm
98%tile
97
9.9
23.3
3650
441
<1145
<1 ppm
Vasna Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
85
9.5
24.9
3394
332
<1145
<1 ppm
Minimum
43
<8.0
11.7
800
109
<1145
<1 ppm
Average
64
8.5
16.9
1350
184
<1145
<1 ppm
98%tile
85
9.4
24.1
3117
323
<1145
<1 ppm
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
88
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Parameters & Results
Station
code
Location (CPCB Designation)
AA12
Kunavar Village
(Rural Areas)
PM10 (100)
[24 Hours]
Maximum
Minimum
Average
AA13
AA14
AA15
Note: All units are in µg/Nm except VOCs, which are in ppm. Figures in brackets indicate CPCB limits.
Minimum Reportable Readings are 8 µg /Nm3 for SO2, 10 µg /Nm3 for NOx, 800µg/Nm3 for THCs, 10
µg /Nm3 for NMHCs, and <1 ppm for VOC
3
CO
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
( 8 hours)
VOC
[NS]
86
9.8
23.8
3468
351
<1145
<1 ppm
41
<8.0
10.0
968
74
<1145
<1 ppm
64
8.5
18.5
2275
216
<1145
<1 ppm
98%tile
83
9.7
23.8
3410
351
<1145
<1 ppm
Fangdi Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
88
10.4
24.1
4155
309
<1145
<1 ppm
Minimum
43
<8.0
10.0
848
150
<1145
<1 ppm
Average
68
8.5
18.3
2174
178
<1145
<1 ppm
98%tile
87
10.2
23.5
4065
303
<1145
<1 ppm
Daran Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
[Grab]
CO
( 8 hours)
VOC
[NS]
Maximum
85
11.4
26.1
3890
190
<1145
<1 ppm
Minimum
48
<8.0
12.5
800
114
<1145
<1 ppm
Average
70
8.7
19.4
1750
151
<1145
<1 ppm
98%tile
85
10.8
25.8
3724
189
<1145
<1 ppm
Lodaria Village
(Rural Areas)
PM10 (100)
[24 Hours]
SO2 (80)
[24 Hours]
NOx (80)
[24 Hours]
HC (NS)
[Grab]
NMHC(NS)
CO
[Grab]
( 8 hours)
VOC
[NS]
Maximum
77
9.9
25.4
3339
476
<1145
<1 ppm
Minimum
36
<8.0
13.0
920
110
<1145
<1 ppm
Average
58
8.8
18.3
2174
241
<1145
<1 ppm
98%tile
77
9.8
24.5
3255
465
<1145
<1 ppm
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
89
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
A comparison of the above results with the value range indicators provided by CPCB



The average concentration of PM10 recorded at 15 locations ranged from 55 (Soja Village) to
81 µg/m3 (Vagosana Village). All these values are within the specified limit of CPCB (100
µg/m3).
The average concentration of SO2 were found in range from 8.3 µg/m3 (Sobhasan Village) to
8.8 µg/m3 (Lodaria & Vagosana Village) All these values are within the specified limit of CPCB
(80 µg/m3
The average concentration of NOX were found in range from 16.9 µg/m3 (Vasna Village) to
24.7 µg/m3 (Vav Village) All these values are within the specified limit of CPCB (80 µg/m3
National Ambient air quality standards are given in Annexure 3. The detailed ambient air quality
monitoring results are given in Annexure 4.
4.6
Noise and Vibration
Ambient noise level is the background sound pressure level at a given location, normally specified as a
reference level to study a new intrusive sound source
Examples of background noises are environmental noises such as waves, traffic noise, alarms, people
talking, bio acoustic noise from animals or birds and mechanical noise from devices such as
refrigerators or air conditioning, power supplies or motors.
The objective of monitoring background noise level in study area is to establish baseline noise level to
identify impact due to proposed drilling activity.
Based on site visit of existing drilling operation in cambay basin, it is observed that exploratory drilling
would not have impact on noise environment beyond site boundary or in close vicinity as the drilling
locations will be selected such that they would be at a safe distance of 500 meter from nearest
habitation.
Hence, nearest habitations or other important locations to proposed wells were selected for baseline
noise monitoring.
4.6.1
Noise Sampling and Analysis Methodology
Methodology for monitoring of noise levels is given in Table 4-13
Table 4-13: Monitoring Methodology of noise
Env.
Component
Ambient
Noise
levels
4.6.2
Sampling
location
Sampling
Parameter
19
Decibels –
Locations
dB (A)
Sampling
Frequency
Once during
the study
Hourly reading
for 24 hours at
each location
Sample collection
Sampling
equipment
Detection
Limit
Methodology
Noise Level
Meter
0.1 dB (A)
ISLM 100
Noise Level Sampling Locations
Noise level sampling locations are given in Table 4-14. Photographs are shown in Photographs 4-3.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
90
D
C
E
F
H
G
I
J
Da
B
To
K
L
M
N
P
O
R
Q
S
N
ap
iy
1
Patiyasara
Tobha
2
p
To Daiya
3
W
Ajawada
Rajkot
Pirgadh
Jampur
Gadsisar
Karbun
Savpura
LEGEND
Kolava
Chothar Nesada
B
Fangadi
Tadav
Umedpura
7
Rachhena
9
Taluka Boundary
Road -NH
Road
Lorwada
Dhima
NL13 GW1
ST12
Railway Line
TALUKA Dudhva
Canal
Lunal
Pratappura
Sapreda
Project Site
Vami
Takhatpura (Dhima) MahadevpuraTHARAD
Achhuva
Mangrol
Hathawada
Ghatiyali
Dheriana
AA1
NL17
8
Bhapi
Ganeshpura
A
6
Bhapdi
Bhorol
5
Chandangadh
Study Area
Bhadodar
Chotil
anch
ore
Rabadi Padar Haripura
To S
Medhala
Idhata
NH-1
5
Kareli
Jamda
Bhachar
Lendau
LAND USE LAND COVER CLASSES
Gangana
Bhakhari
Lodrani
Dolatpura
Mahajanpura
Gambhirpura
Nalodar
11
Chuva
Golgam
Uchpa
Sardarpura
NL11
(Banaskantha District)
12
Charda
Bukna
Reluchi
14
Khimanavas
15
Asaravas
16
Asaragam
Padan
H
Khanpur
Nesda
Morikha
NH
-15
To Suigam
Koreti
Bahisara
23
Chala Dhanana
24
Motipura
DEVPURA
(SUIGAM)
Vasarda
ST15
GW4
Khadol
NL8
Bhatasana
Eta
G
To
am
ig
Su
Kumbharkna
Radka
Suthar Nesdi
Uchosan
30
31
Jorawargadh
NH-15
Tetarva
Bhambordi
Chembuva
Mespura
Chaladara
Vadana
Abala
Barvala
BHABHAR TALUKA
Duchakvada
ST18
GW7
Vadana Samla
Nesda
Bhabhar
ur
dhanp
To Ra
Gangot
F
Odha
Dhanakwada
Kotda Deodar
Salpura
SH-70
Diodar
Ludara
Raiya
Khara
Mesra
Vakha
KANKREJ TALUKA
Nanota
To Deesa
Sanadar
Boda
Mitha
Bhadkasar
Jasali
Sadapura
(Jasali)
Khodla
Zalmor
Vakha
Karela
Nava
ST12
ST13
ST14
ST15
ST16
ST17
ST18
ST19
:
:
:
:
:
:
:
:
Dhima Village
Budhanpura Village
Vav Village
Vasarda Village
Kotarwada Village
Paldi Village
Duchakvada Village
Lakhani Village
SCALE
eesa
0
Chimangadh
Surana
Mulakpur
4
2
6
8Km
KADAM ENVIRONMENTAL CONSULTANTS
871/B/3, Near Himalaya Machinery
GIDC, Makarpura, Vadodara - 390 010.
Tel: +91 (0) 265 2644909 / 2647 213
Fax: +91 (0) 265 2638411
E-mail: [email protected]
Delwada
Dhrandav
Soil
Dhima Village
Budhanpur Village
Vav village
Vasarda Village
Kotarvada Village
Paldi Village
Duchakvada Village
Lakhani Village
Soni
To D
Kunvarva
Dhrandvada
Bhodaliya
:
:
:
:
:
:
:
:
Navapura
Forna
DEODAR TALUKA
Kuvala
Noise Level
NL5 : Vagosana Village
NL6 : Indrapura Village
NL7 : Dhedhu Village
NL14 : Boru Village
NL15 : Nava Village
Kotada
Chagwada
Jada Chamanpura
Liladhar
Ravel
Bhesana
Lunsela
Vatam Nava
Mojru Nava
Vadiya
Abasana
Chatra
Dudhva
Asana
Radakiya
28
29
Sardarpura
Manvarpura
Sedhav
Paldi
AA6
NL12
ST17 Khanodar
GW6
Dheriana Village
Vav Village
Bhankhod Village
Lalpura Village
Kotarwada Village
Manpura Jalodha
Narana
Vatam Juna
Mojru Juna
Nokha
Harkudia
Balodhan
esa
Jalodha
Sesan Juna
Bhagwanpura
Khari Paldi
Lalpura
AA4
GW1
GW2
GW3
GW4
GW5
GW6
GW7
GW8
Dera
Sesan Nava
Golvo
Rampura
Manpura
Dhunsol
Kalyanpura
NL10
T o De
Vasna
:
:
:
:
:
Ground Water
Moral
DEESA TALUKA
Vajegadh
Rantila
Golvi
Devkapadia Mera
AA1
AA2
AA3
AA4
AA5
E
Kunvata
Dhunsol
Vajapur Juna
Rampura
Benap
Sanesda
Bhankhod
AA3
NL16
SAMPLING LOCATIONS
Ambient Air Location
AF
Chibhda
Kotarwada
AA5 ST16
NL10 GW5
Vajapur Nava
26
27
D
Janavada Ishvariya
AE
Lalpur
Lakhani
ST19
GW8
Makdala
Daua
Dethali
Savpura
AD
AC
Jasara
Luvana
Sanav
Nesdi
AB
Asasan
Kuwana
Makhanu
Baiyak
AA
Peparal
Chalva
Devpura
Talasar
Bhadval
Mamana
SH
-54
Lembau
Sanavia
Biyok
Limbala
Bharadava
Jetda
Khorda
Rampur
Kanothi
Z
Lunawa
Sanadhar
Thithgam
NL18
Y
Achhavadiya
Gangasar
21
X
Gela
Moti Pavad
Del
Dendava
W
Karnasar
Nani Pavad
Bhachali
Bhatvargam
Jelana
V
Jandla
Dodgam
Madka
19
25
T
Malupur
Nagala
Chandarva
Golap
ra
ne
ha
U
Vejagadh
Malsan
Reservoir / Lakes / Ponds / Tanks
Vadgamda
5
NH-1
C
Residential / Commercial
28
SH-1
Khardol
17
22
D
To
Malupur
Vavdi
NL19
Khimana Padar
Chatarpura
Budhanpura
ST13
GW2
Abhepura
Vav
AA2 GW3
ST14
Ravla
Built-up / Habitation
Water Bodies
Ghesda
Tharad
VAV TALUKA
13
18
Chudmer
Symbol /
Colour
2nd Classification
1st Classification
Janadi
10
Symbol / Colour
Name
Baluntri
4
E
S
Rampur
Saba
TITLE OWNER PROJECT
A
EIA/EMP and RA/DMP for Proposed Exploratory
Drilling of Wells Block CB-ONN-2010/1
M/s ONGC Limited.
Map showing SAMPLING LOCATION
in the study area
REVISION : 0
DRAWN BY : KK
SCALE : As Shown
CHD BY : SK
DATE : 21-03-2015
APPROVED BY : SK
DRAWING NO:
M-4.2(A)
SOURCE : Satellite image taken from Enhance Version of Google earth pro 2013
B
D
C
E
F
To Visnagar
H
To G
Vijapur
1
I
J
K
Tintodan
Himmatpura
Dhandhusan
N
Symbol / Colour
Name
W
Study Area
E
S
Proposed Site Boundary
Harnahoda
Road
Railway
SH-73
Samou
Charada
Padusma
18
SH-2
To
he
Ma
Itadara
KhorajDabhi
Paliyad
Bhavpura
KADI TALUKA
10
Vadu
Nava
NL15
Kotha
Narola
SW6
Soja
AA8
ST6
GW10
Nadri
Nardipur
AA7
ST5
GW9
Dingucha
Jhulasan
Delvad
Limbodara
Amarapur
Balva
SW9
Amaja
Aluva
Sadra
Pindharada
GANDHINAGAR TALUKA
Vasan
SH
Bhadol
Sardhav
KADAM ENVIRONMENTAL CONSULTANTS
871/B/3, Near Himalaya Machinery
GIDC, Makarpura, Vadodara - 390 010.
Tel: +91 (0) 265 2644909 / 2647 213
Fax: +91 (0) 265 2638411
E-mail: [email protected]
Dolarana Vasana
-21
7
Vadavsvami
Randheja
14
Sonipur
Dhamasna
-1
38
Isand
SH
15
To
Jalund
Kolavada
Adraj Moti
16
To
l
lo
Ka
K
To
l
alo
Bhoyan Rathod
Ga
nd
hin
a
ga
r
Gandhinagar
Arsodiya
Jamnagarpura
Noise Level
NL5 : Vagosana Village
NL6 : Indrapura Village
NL7 : Dhedhu Village
NL14 : Boru Village
NL15 : Nava Village
Anandpura
Chekhalarani
Piplaj
Rupal
Pansar
Nardipur Village (Pond)
Soja Village (Pond)
Vagosana Village (Pond)
Sobhasan Village (Pond)
Balva Village (Pond)
ST5 : Nardipur Village
ST6 : Soja Village
ST7 : Vagosana Village
ST8 : Golthara Village
ST9 : Dhedhu Village
ST10 : Jamla Village
ST11 : Indrapur Village
Mubarakpura
Mokhasan
:
:
:
:
:
Soil
Unava
SW5
Surface Water
SW5
SW6
SW7
SW8
SW9
KALOL TALUKA
Rampura
Pratappura
Golthara
ST8
GW12
11
Itla
Ground Water
GW9 : Nardipur Village
GW10 : Soja Village
GW11 : Vagosana village
GW12 : Golthra Village
GW13 : Dhedhu Village
GW14 : Jamla Village
Rajpura
TITLE OWNER PROJECT
a
san
ahe
To M
Karjisan
Jamla
ST10
GW14
Ambod
Manekpur
Vagosana
AA10 ST7 Parbatpura
NL5
GW11
Dholakuva
SW7
Bhimpura
Dhedhu
NL7 ST9
GW13
Sobhasan
AA9
SW8
ive
r
Hadvi
Makakhad
at
iR
SH-217
Veda
AA7 : Nardipur Village
AA8 : Soja Village
AA9 : Sobhasan Village
AA10 : Vagosana Village
Pratap Nagar
Indrapura Rampura
NL6
ST11
GW15
7
Vadasma
Badpura
SH
-71
Boru
NL14
River
SAMPLING LOCATIONS
Ambient Air Location
Anandpura
Fatehpura
Gulabpura
Mansa
Residential / Commercial
Water Bodies
Sa
ba
rm
Khata Amba
Symbol /
Colour
Ponds / Lakes / Tanks
ijapu
r
MANSA TALUKA
Saldi
Himmatpura
Bapupura
To V
-71
SH
Parsa
2nd Level Classification
Built-up / Habitation
To Prantij
Ridrol
SH
Solaiya
Kharna
SH-138
-13
0
a
san
Amarpura
6
Dangarva
LAND USE LAND COVER CLASSES
Dhameda
Langhanaj
8
Taluka Boundary
1st Level Classification
Charadu
5
Canal
Vij
ap
ur
Anandpura
Umiya Nagar
4
17
LEGEND
O
MEHSANA TALUKA
Gozaria
13
N
To
To M
ahes
ana
3
12
M
Road - NH/SH
2
9
L
To Visnag
ar
A
SCALE
Titoda
0
2
4
6
8Km
EIA/EMP and RA/DMP for Proposed Exploratory
Drilling of Wells Block CB-ONN-2010/6
M/s ONGC Limited.
Map showing SAMPLING LOCATION
in the study area
REVISION : 0
DRAWN BY : KK
SCALE : As Shown
CHD BY : SK
DATE : 21-03-2015
APPROVED BY : SK
DRAWING NO:
M-4.2(B)
SOURCE : Satellite image taken from Enhance Version of Google earth pro 2013
E
F
H
G
J
District Mehsana (Taluka Kadi)
Medha
Agol
Anadej
Govindpura
mg
am
Adhana
Vayana
Nasmed
Bhavanpur
District Gandhinagar (Taluka Kalol)
Davedi
Nana Viramgam
Dodar
4
Sachana
Rancharada
Chekhla
Manipur
Iyava
A
B
Godhavi
Ogan
F
Khoda
Nidhraad
Vasna
Iyava
Madhavnagar
Rupavati
Bol
Zolapur
Shela
Kaneti
Vasodara C
District Ahmedabad(Taluka Sanand)
SANAND
dabad
To Ahme
Gibpura
Telav
Ranmal Gadh
9
10
Hirapur
Melasana
S
Daduka
Lekhba
35
H-1
Kodaliya
13
la
To Say
Navapura
Juda
Kundal
Moti Devti
Khicha
NL1 SW2
ST2
GW17
Fangdi
AA13
Moraiya
Nani Devti
Palwada
Modasar
NL3 Matoda
Mankol
14
Kolat
Lekhamba
Vinchhiya
12
Sanathal
Soyala
Pipan
Kunavar
AA12
Makhiyav
Bakrana
11
Goraj
NL2 SW1
ST1
GW16
Charal
SH
-7
4
Tajpur
District Ahmedabad
(Taluka Daskroi)
Morasar
Rethal Nal Safari
Juwal
NL4
Govinda
15
Sankod
16
Rajoda
Vasna
AA11
Kavla
Nanodara
18
Rasam
E
Dhedhal
4
-14
Rupal
Chhabasar
Baldana
Badarkha
Saroda
Rupavati
GW20
Zekda
Kerala
Chandisar
Chaloda
Salajada
Kochariya
Dahegamda
Kavitha
District Ahmedabad
(Taluka Dholka)
Hasannagar
19
Bhat
BAVLA
Adroda
District Ahmedabad (Taluka Bavla)
20
SH
D
NH
-8
A
17
Vasna
Chacharvadi
SW3
Lodariya
Daran
AA15
AA14
ST4
ST3
GW18 GW19
SW4
4
-7
SH
Shekhdi
Amipura
Vasna
Keliya
Kelia Vasna
Maflipur
Ranoda
Lagdana
Ranesar
Bhayala
To
LEGEND
Study Area
Project Site
Road (NH & SH)
Road
Railway
Canal
LAND USE LAND COVER CLASSES
Built-up / Habitation
Water Bodies
2nd Classification
Residential / Commercial
Reservoir / Lakes / Ponds / Tanks
River Beds
Symbol /
Colour
Sakodara
Lana
SCALE
0
2
4
6
8KM
KADAM ENVIRONMENTAL CONSULTANTS
AA11
AA12
AA13
AA14
AA15
District Boundary
1st Classification
Dhanwada
SAMPLING LOCATIONS
Ambient Air Location
Symbol / Colour
Name
t
jko
Ra
a
olk
Dh
Kalyangadh
22
Sindhrej Dholka
Chiyada
Surface Water
Vasna Village
Kunavar Village
Fangdi Village
Daran Village
Lodaria Village
SW1
SW2
SW3
SW4
:
:
:
:
Ground Water
NL1
NL2
NL3
NL4
:
:
:
:
GW16
GW17
GW18
GW19
GW20
:
:
:
:
:
: Goraj Village
: Khicha Village
: Daran village
: Lodharia Village
: Rupavati Village
Goraj Village (Pond)
Khicha Village (Pond)
Daran Village (Pond)
Lodharia Village (Pond)
Noise Level
Khicha Village
Goraj Village
Modasar Village
Juwal Village
871/B/3, Near Himalaya Machinery
GIDC, Makarpura, Vadodara - 390 010.
Tel: +91 (0) 265 2644909 / 2647 213
Fax: +91 (0) 265 2638411
E-mail: [email protected]
Soil
ST1
ST2
ST3
ST4
:
:
:
:
Goraj Village
Khicha Village
Daran Village
Lodharia Village
TITLE OWNER PROJECT
21
To
his map and the information it contains are the exclusive property of Kadam Environmental Consultants (KEC), Vadodara. They are merely loaned and on the borrower's
xpress agreement that they will not be reproduced, copied, loaned, exhibited or used except when permitted with the explicit written consent given by KEC.
7
8
Garodiya
Amnagar
Kalana
Shiyavada
Vansajada
Dhedia
Palodiya
Chharodi
Khoraj
6
Unali
Rampura
Naranpura
SH
-17
5
District Ahmedabad
(Taluka Viramgam
Chandrasan
Yashvantpura
ed
ab
ad
Vir
a
E
S
SH-4
To
N
P
O
W
Khanderavpura
Nadan
N
Thol
Mulasana
Kanjari
Virochannagar
M
m
2
L
Ah
Panthoda
K
SH-135
1
3
I
To
D
C
di
B
To Ka
A
EIA/EMP and RA/DMP for Proposed Exploratory
Drilling of Wells Block CB-ONN-2010/9
M/s ONGC Limited.
Map showing SAMPLING LOCATION
in the study area
REVISION : 0
DRAWN BY : KK
SCALE : As Shown
CHD BY : SK
DATE : 21-03-2015
APPROVED BY : SK
DRAWING NO
M-4.2(C)
SOURCE : Satellite image taken from Enhance Version of Google earth pro 201
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Table 4-14: Noise Level Sampling Locations
Location Code
Location
NL1
Khicha Village
NL2
Goraj Village
NL3
Modasar Village
District
Date
Category
Ahmedabad
22.12.14
Residential
Ahmedabad
25.12.14
Residential
Ahmedabad
27.12.14
Residential
NL4
Juwal Village
Ahmedabad
28.12.14
Residential
NL5
Vagosana Village
Gandhinagar
29.12.14
Residential
NL6
Indrapura Village
Gandhinagar
30.12.14
Residential
NL7
Dhedhu Village
Gandhinagar
31.12.14
Residential
NL8
Khodal Village
Banaskantha
08.11.14
Residential
NL9
Kotarwada Village
Banaskantha
10.11.14
Residential
NL10
Kalyanpura Village
Banaskantha
11.11.14
Residential
NL11
Sardarpura Village
Banaskantha
12.11.14
Residential
NL12
Paldi Village
Banaskantha
13.11.14
Residential
NL13
Dhima Village
Banaskantha
14.11.14
Residential
NL14
Boru Village
Gandhinagar
15.10.14
Residential
NL15
Nava Village
Gandhinagar
16.10.14
Residential
NL16
Bhankhod Village
Banaskantha
17.11.14
Residential
NL17
Dheriyana Village
Banaskantha
18.11.14
Residential
NL18
Thithgam Village
Banaskantha
19.11.14
Residential
NL19
Vavdi Village
Banaskantha
20.11.14
Residential
Photographs 4-3: Photographs of Noise Level Sampling Locations
Paldi Village
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Dhima Village
91
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Dhedhu Village
4.6.3
DESCRIPTION OF THE ENVIRONMENT
Juwal Village
Noise Level Results
The average noise levels are presented in Table 4-15.
Table 4-15: Noise Level Readings
CPCB Limits in
dB(A)leq
Station
Code
Noise Monitoring
Location
Category of
Area/Zone
Day Time
Hours
[06:00 to
22:00]
Night
Time
Hours
[22:00 to
06:00]
Noise Levels in dB(A)
leq
Day Time
Hours
[06:00 to
22:00]
Night
Time
Hours
[22:00 to
06:00]
NL 1
Khicha Village
Residential
55
45
63.77
55.17
NL 2
Goraj Village
Residential
55
45
53.48
44.96
NL 3
Modasar Village
Residential
55
45
56.05
46.41
NL 4
Juwal Village
Residential
55
45
58.19
43.98
NL 5
Vagosana Village
Residential
55
45
52.03
46.13
NL 6
Indrapura Village
Residential
55
45
58.78
44.93
NL 7
Dhedhu Village
Residential
55
45
56.46
57.54
NL 8
Khodal Village
Residential
55
45
56.77
47.37
NL 9
Kotarwada Village
Residential
55
45
56.84
59.6
NL 10
Kalyanpura Village
Residential
55
45
54.12
40.0
NL 11
Sardarpura Village
Residential
55
45
53.07
41.11
NL 12
Paldi Village
Residential
55
45
63.95
62.64
NL 13
Dhima Village
Residential
55
45
60.79
41.97
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
92
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
CPCB Limits in
dB(A)leq
Station
Code
Noise Monitoring
Location
Category of
Area/Zone
Day Time
Hours
[06:00 to
22:00]
Night
Time
Hours
[22:00 to
06:00]
Noise Levels in dB(A)
leq
Day Time
Hours
[06:00 to
22:00]
Night
Time
Hours
[22:00 to
06:00]
NL 14
Boru Village
Residential
55
45
65.56
47.39
NL 15
Nava Village
Residential
55
45
62.51
61.7
NL 16
Bhankhod Village
Residential
55
45
59.56
55.27
NL 17
Dheriyana Village
Residential
55
45
60.16
44.2
NL 18
Thithgam Village
Residential
55
45
66.06
57.03
NL 19
Vavdi Village
Residential
55
45
56.94
43.58
Noise levels were recorded at thirty five different locations within the study area.


4.6.4
Noise level during daytime, in Residential area was observed in the range of 52.03 dBA to
66.06 dBA during daytime which is slightly higher than CPCB standards residential area (55
dBA (d)) and higher noise levels at some of the monitoring locations is attributed to vehicular
movements.
Noise level during Nighttime, in Residential area was observed in the range of 40.0 dBA to
62.64 dBA, which is slightly higher than the CPCB standards i.e. residential area 45 dBA.
Vibration
Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The
oscillations may be periodic such as the motion of a pendulum or random such as the movement of a
tire on a gravel road.
Major sources of vibration are blasting due to mining activities, vibration caused by motions
of engines, electric motors, or any mechanical device in operation theses are typically unwanted. Such
vibrations can be caused by imbalances in the rotating parts, uneven friction, the meshing
of gear teeth, etc. such vibrations can be reduced by proper designing.
In the study area there are no major sources of vibrations i.e. mines etc.
4.7
4.7.1
Geology
Geology of Block CB-ONN-2010/1 (Banaskantha District)
Topography
Site and surrounding area covers part of Banaskatha Districts. Topographically, entire area, part of
Gujarat alluvium plains, is almost flat with gentle dipping toward southwest. Banas River is passing
~20km south from block boundary.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
93
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Geologically, Block CB-ONN-2010/1 is flat terrain occupied by thick piles of Quaternary and Tertiary
sediments
Geology of Mehsana and Patan districts is given in Table 4-16.
Table 4-16: Geology of Block CB-oNN-2010/1
Lithology
Formation
Sand, mud flat deposits,
Jantral, Katpur, Varahi,
Rann clay, Akhej
formations
Tidal flat deposits, levee deposits etc
Group/Supergroup
Age
Holocene
unconformity
Variegated clay, siltstone, marl,
calcareous, grit, sandstone, polymict
conglomerate etc
Vend, Miliolite
formations
Shelly and foraminiferal limestone,
marl, calcareous sandstone
conglomerate
Gaj formation
Granite, quartz porphyry, quartz vein
Idar granite
Granite, leuccogranite, quartzofeldspathic veins
Sendra-Ambaji granite
Calc-schist, calc gneiss and biotite
gneiss
Kumbalgarh group
Porbander group
Post Miocene
Unconformity
Lower to middle
Miocene
unconformity
Malani Igneous suit
Upper proterozoic
Middle proterzoic
unconformity
4.7.2
Delhi supergroup
Lower to middle
proterozoic
Geology of Block CB-ONN-2010/6, 9 (Gandhinagar and Ahmedabad District)
The geology of Ahmadabad and Gandhinagar Districts has been studied in detail by the workers of
geological survey of India, ONGC and State Geology Department. Based on District Resource Map, a
brief geology of the district is as under.
The entire area is covered with thick pile of Quaternary sediments except few patchy outcrops of
Basalt in SW portion of the Ahmadabad district. Topographically, entire area is almost plain terrain
made up of mudflats and sand sheets. Some patches shows rolling topography because of aeolian
deposits in the form of sand dunes. Sediments of Pleistocene age are represented by Vend
Formation (variegated clay and siltstone) and Miliolite Formation (Oolitic to sandy limestone and
sandstone) of Porbandar Group. Sediments of Holocene age are represented by Rann Clay, Katpur,
Akhaj, Mahuva, Varahi, Jantral and Nal Sarovar Formations. Rann Clay and Mahuva formations (tidal
flats and tidal marsh deposits) are deposited in marine environment. Katpur and Varahi Formations
(flood plain, levees, channel fill, delta deposits) are deposited in fluvial environment and mostly
confined to river. Jantral and Akhaj Formations (sand dunes and sand sheets) are representing
aeolian environment of deposition and Nal Sarovar represents lacustrine deposits.
Table 4-17: Geology of Blocks in Ahmedabad and Gandhinagar District
Lithology
Formation
Lacustrine deposits
Nal Sarovar (LE)
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Group
Age
Holocene
94
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Lithology
Formation
Sand sheet and sand dunes
Jantral (AE)
Channel fill and flood plain deposits
Varahi (FE)
Shoal, Spit bar, tidal flats, tidal marsh
Mahuva (ME)
Sand sheets and sand dunes
Akhaj (AE)
Flood plain, levees, delta deposits
Katpur (FE)
Older tidal flat deposits
Rann Clay (ME)
Variegated clay, siltstone and marl
Vend
Oolitic to sandy limestone with
intercalated grit and sandstone
Miliolite
Basalt flow
4.8
DESCRIPTION OF THE ENVIRONMENT
Group
Porbandar
Group
Deccan Volcanics
Age
Pleistocene
Upper Cretaceous to
Eocene
Soil
The project area covers three districts (Banaskantha, Ahmedabad and Gandhinagar) of North Gujarat
Agro-climatic zone IV & V of Gujarat and these districts fall under AEZ (Agro-ecological region) 15,
13A and 20,respectively.AEZs are characterized by 60-80 cm rain fall,1-3% soil slope in Banaskantha
as well as Gandhinagar and 3-8% in Ahmedabad and district. The soil are by and large having loam
texture barring few areas in all the district, wherein clay loam to clay soils are present .The soil salinity
is<2dS/m, however there is a large variation in depth of water table, which is around 15m in some
areas of Ahmedabad districts and30-100m in Banaskantha and Gandhinagar districts. The cropping
intensity 139% in Banaskantha and 137% in Ahmedabad and Gandhinagar districts. The irrigation in
M is mainly through bore wells (75.3-82.4%) and through open wells as well as tanks, while in
Ahmedabad 45 area is irrigated through bore wells as well as through canal (23%) and tanks
(20%).The main crops are bajara, pulses, ground nut, cotton. The horticultural crops are tomato,
cluster bean, brinjal and okra in Banaskantha, while Ahmedabad and Gandhinagar grow ber, citrus
and cucurbits. The significant fruit crops coming up in Banaskantha are pomegranate and apple ber.
The soils of the area are by and large fertile and productive.
4.8.1
Soil Sampling Locations
Soil sampling was carried out in nineteen (19) locations in the study area and they are presented in
Table 4-18.
Table 4-18: Surface Soil Sampling Locations
Code
Location
Date of Sampling
ST 1
Goraj
30-11-2014
ST 2
Khicha
29-11-2014
ST 3
Daran
28-11-2014
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
District
Ahmedabad
95
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Code
Location
Date of Sampling
ST 4
Lodhariya
01-12-2014
ST 5
Nardipur
16-11-2014
ST 6
Soja
16-11-2014
ST 7
Vagosana
16-11-2014
ST 8
Golthara
16-11-2014
ST 9
Dhenthy
16-11-2014
ST 10
Jamla
16-11-2014
ST 11
Indrapur
16-11-2014
ST 12
Dhima
23-12-2014
ST 13
Budhanpura
24-12-2014
ST 14
Vav
24-12-2014
ST 15
Vasarda
24-12-2014
ST 16
Kotarwada
24-12-2014
ST 17
Paldi
24-12-2014
ST 18
Duchakvada
24-12-2014
ST 19
Lakhani
24-12-2014
DESCRIPTION OF THE ENVIRONMENT
District
Gandhinagar
Banaskantha
Locations selected for surface soil sampling are shown in M 4.2. (A to C)
Photographs 4-4: Photographs of Soil Sampling Locations
Soil Sampling at Nardipur Village
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Soil Sampling at Jamla Village
96
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Soil Sampling at Vagosana Village
4.8.2
DESCRIPTION OF THE ENVIRONMENT
Soil Sampling at Golthara Village
Sampling and Analysis Methodology
Methodology of soil sample monitoring is given in Table 4-19 and the soil sampling analysis results
are given in Table 4-20 to Table 4-22.
Table 4-19: Methodology of Soil Sample Monitoring
Sampling
Parameters
Sample
collection
Analytical
Equipment
Methodology
Remarks
Porosity
-
IS: 2720 Part 7
Water holding capacity
Keen Apparatus
HMSO, UK
Permeability
-
IS: 2720 Part 17
Moisture content
Electronic Balance
IS: 2720 Part 2
-
IS: 2720 Part 4
Trial pit method
for topsoil
sample
collection;
disturbed
samples
Glass wares
IS: 2720 Part 4
Centrifuge
IS: 2720 Part 24
(1976)
Texture
Particle size
Distribution
Cation Exchange
Capacity
SAR
Manual sample
collection using
hammer and
container tube for
collecting
undisturbed top
soil.
F. Photometer (Na,
K)
Calculation
Titration ( Ca & Mg)
pH
pH Meter
4500 H+B
Electrical Conductivity
Conductivity Meter
As per IS 14767 -2000
Calcium
Glass wares
3500 Ca B
Magnesium
Glass Wares
3500 Mg B
Sodium (Na)
F. Photometer
3500 Na B
Potassium
F. Photometer
3500 K B
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
5% Leachate to
be made and
analyzed as per
APHA,
“Standard
Methods”
All method
numbers are as
per APHA
“Standard
Methods” (21st
edition, 2005)
97
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-20: Soil Analysis Results
ST1
ST2
ST3
ST4
ST5
ST6
Goraj
Khicha
Daran
Lodhariya
Nardipur
Soja
56
59
55
57
57
58
42
55
41.00
45.00
14.6
8.89
7.79
6.48
1.57
3.1
3.59
5.87
45
24
40
39
S.
No
Parameter
Unit
1
Porosity
%
2
Water Holding Capacity
%
43
52
3
Permeability
mm/hr
13.1
7.98
4
Moisture
%
2.88
9.23
5
Particle Size Distribution
a
Sand
%
33
21
b
Clay
%
48
47
34
45
28
32
c
Silt
%
19
32
21
31
32
29
6
Texture
Loam
Clay Loam
Loam
Clay Loam
Clay Loam
Clay Loam
7
Cation Exchange Capacity
mg/100gm
58.24
66.80
92.13
70.80
84.73
75.15
8
Electrical Conductivity
dS/m
0.1083
0.1621
0.180
0.129
0.1815
0.1807
9
Sodium Absorption Ratio
0.28
0.35
0.69
0.44
0.24
0.21
10
Exchangable Sodium
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
11
pH
7.40
7.51
7.53
7.60
7.30
7.43
%
12
Calcium
gm/kg
0.48
0.40
0.56
0.64
0.96
1.19
13
Magnesium
gm/kg
0.78
0.73
0.15
0.34
1.80
1.47
14
Sodium
gm/kg
0.19
0.23
0.32
0.25
0.25
0.20
15
Potassium
gm/kg
0.06
0.07
0.15
0.09
0.17
0.10
ST7
ST8
ST9
ST10
ST11
ST12
Vagosana
Golthara
Dhenthy
Jamla
Indrapur
Dhima
51
59
55
47
49
54
Table 4-21: Soil Analysis Results
S.
No
Parameter
Unit
1
Porosity
%
2
Water Holding Capacity
%
44
45
38
39
40
35
3
Permeability
mm/hr
22.9
2.43
13
27.1
25.1
14
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
98
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S.
No
DESCRIPTION OF THE ENVIRONMENT
ST7
ST8
ST9
ST10
ST11
ST12
Vagosana
Golthara
Dhenthy
Jamla
Indrapur
Dhima
%
2.05
3.93
2.88
1.13
0.91
26.59
%
49
23
31
59
53
40
Parameter
Unit
4
Moisture
5
Particle Size Distribution
a
Sand
b
Clay
%
21
51
47
19
23
38
c
Silt
%
29
26
22
22
24
22
6
Texture
Sandy Clay Loam
Silty Loam
Loam
Sandy Clay Loam
Sandy Clay Loam
Loam
7
Cation Exchange Capacity
mg/100gm
84.12
72.51
71.53
78.15
57.76
47.44
8
Electrical Conductivity
dS/m
0.177
0.165
0.181
0.175
0.134
0.0956
0.23
0.22
0.17
0.27
0.18
0.3 %
<0.01
<0.01
<0.01
<0.01
<0.01
<0.1
7.51
7.53
7.50
7.48
7.51
7.86
9
Sodium Absorption Ratio
10
Exchangable Sodium
11
pH
12
Calcium
gm/kg
0.90
0.93
1.09
0.95
0.74
0.5
13
Magnesium
gm/kg
1.69
1.48
1.19
1.13
1.35
0.43
14
Sodium
gm/kg
0.23
0.21
0.15
0.23
0.16
0.17
15
Potassium
gm/kg
0.13
0.08
0.18
0.11
0.07
0.04
Table 4-22: Soil Analysis Results
ST13
ST14
ST15
ST16
ST17
ST18
ST19
Budhanpura
Vav
Varsada
Kotarwada
Paldi
Duchakvada
Lkhani
%
51
55
47
50
49
48
47
Water Holding Capacity
%
34
37
19
33
31
26
25
3
Permeability
mm/hr
21.4
12.3
30
22.2
24.5
25.8
27.1
4
Moisture
%
22.32
30.22
33.11
32.69
5.35
4.12
34.08
5
Particle Size Distribution
a
Sand
%
56
39
72
57
64
69
72
b
Clay
%
25
42
10
24
14
11
9
c
Silt
%
19
19
18
19
22
20
19
S.
No
Parameter
Unit
1
Porosity
2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
99
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S.
No
Parameter
Unit
DESCRIPTION OF THE ENVIRONMENT
ST13
ST14
ST15
ST16
ST17
ST18
ST19
Budhanpura
Vav
Varsada
Kotarwada
Paldi
Duchakvada
Lkhani
Sandy Loam
Loam
Sandy Loam
Sandy Loam
Silty Clay Loam
Sandy Loam
Sandy Loam
71.78
56.4
68.45
57.11
58.86
70.13
56.62
112.5
141.2
142.4
163.8
210.5
174.5
6
Texture
7
Cation Exchange
Capacity
mg/100gm
8
Electrical Conductivity
dS/m
105.8
9
Sodium Absorption Ratio
0.45
0.29
0.34
0.34
0.33
0.29
0.24
10
Exchangable Sodium
%
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
11
pH
8.12
8.21
8.07
8.15
8.13
8.1
8.09
12
Calcium
gm/kg
0.66
0.45
0.72
0.56
0.71
0.69
0.85
13
Magnesium
gm/kg
0.43
0.6
0.53
0.44
0.59
1.09
0.75
14
Sodium
gm/kg
0.27
0.18
0.22
0.2
0.22
0.23
0.18
15
Potassium
gm/kg
0.05
0.08
0.1
0.06
0.02
0.06
0.06
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
100
OIL AND NATURAL GAS CORPORATION
LIMITED
4.8.3
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Quality of Soil
Block CB-ONN-2010/1 (Banaskantha District)
Eight soil samples from the project area were collected to monitor physical and chemical properties of
soils. The porosity ranged from 47% (Vasarda & Lakhni villages) to 55% (Vav vilage) and WHC varied
from 19% (Vasarda village) to 37% (Vav village). The permeability ranged from 12.3mm/hr (Vav
village) to 30mm/hr (Vasarda village) mainly due to sandy loam texture of soils mostly of alluvial
origin. However the CEC of soils is very high ranging from 47.44meq/100g soil (Dhima village) to
71.78meq/100g soil (Budhanpura village) may be due to very high amount of organic matter
application. Although the ground waters in some of the areas are highly saline the soil salinity levels
are much below the threshold level of 0.8 dS/m and even soil sodicity as determined by ESP is <0.01.
The soil pH ranged from 7.86 (Dhima village) to 8.21 (Vav village). Among water soluble cations
predominance of calcium was seen followed by magnesium, sodium and potassium.
Block CB-ONN-2010/6 (Gandhinagar District)
Seven soil samples from the project area were collected to monitor physical and chemical properties of
soils. The porosity ranged from 47% (Jamla village) to 59% (Golthara village) and WHC varied from
38% (Jamla village) to 45% (Soja & Golthara villages). The permeability ranged from 0.91 mm/hr
(Indrapura village) to 5.87 mm/hr (Soja village) mainly due to loamy texture of soils mostly of alluvial
origin. However, the CEC of soils is very high ranging from 57.76 meq/100g soil (Indrapura village)
to 84.2 meq/100g soil (Soja village) may be due to very high amount of organic matter application.
Although the ground waters in some of the areas are highly saline the soil salinity levels are much
below the threshold level of 0.8 dS/m and even soil sodicity as determined by ESP is <0.01. The soil
pH ranged from 7.30 (Nardipur village) to 7.53 (Golthra village). Among water soluble cations
predominance of magnesium was seen followed by calcium, sodium and potassium.
Block CB-ONN-2010/9 (Ahmedabad District)
Five soil samples from the project area were collected to monitor physical and chemical properties of
soils. The porosity ranged from 55% (Daran village) to 59% (Khicha village) and WHC varied from
42% (Daranvillage) to 55% (Lodhariya village). The permeability ranged from 7.98mm/hr (Khicha
village) to 14.6 mm/hr (Daran village) mainly due to loamy texture of soils mostly of alluvial origin.
However the CEC of soils is very high ranging from 58.24 meq/100g soil (Goraj village) to 92.13
meq/100g soil (Daran village) may be due to very high amount of organic matter application. Although
the ground waters in some of the areas are highly saline the soil salinity levels are much below the
threshold level of 0.8 dS/m and even soil sodicity as determined by ESP is <0.01. The soil pH ranged
from 7.40 (Goraj village) to 7.60 (Lodhariya village). Among water soluble cations predominance of
calcium was seen followed by magnesium, sodium and potassium.
Over all soil information indicate that large part of soils are of alluvial origin (Inceptisol) and well
drained barring few areas which are having high water holding capacity but poorly drained on account
of clay loam to clay texture. There are no problem of salinity or sodicity in spite of the fact that
underground waters are saline to highly saline.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
101
OIL AND NATURAL GAS CORPORATION
LIMITED
4.9
4.9.1
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Hydrology and Ground Water
Hydrology
Block CB-ONN-2010/1
The site and surrounding area is covered with multilayered Quaternary alluvium sediments having
huge thickness. These deposits mostly contains fine sand, silt and clay layers. Groundwater occurs in
confined conditions.
Google Earth and Geological map studies indicate geologically there is a close relation of site with
Great Rann of Kutch. The Great Rann of Kutch is at around 30 km, towards West from wastern block
boundary. This Rann of Kutch has continuity /extension, towards south, to Gulf of Kutch. These
stretches are saline tracts due to formational salinity owing through the origin as sea deposits. It is
likely to have subsurface continuity of such saline tracks at study area.
During groundwater sampling, groundwater levels as informed from well owners are lower down to
more than ~100m. Tharad block falls under Over-Exploited zone as per CGWA notification.
Majority part of this block is falls under Narmada Canal command area.
Block CB-ONN-2010/6
A lithological log and water level details of tubewell near Mansa village, (~5 km northeast of block)
were collected from GWRDC. As per litholog, an alternate sequence of sand and clay exists. Sandy
aquifer confined by clay layers. Clay layers having less thickness indicate limited areal extent and also
aerially interconnection of sandy layers. As per received details, groundwater level was 170 m.
Mansa and Gandhinagar blocks falls under Over-Exploited zone as per CGWA notification.
Block CB-ONN-2010/9
The entire area is covered with sandy and silty soil which is recent alluvium. A lithological log and
water level details of tubewell near Bopal village, (~14 km east of site) were collected from GWRDC.
As per lithological log, the entire area is covered by alternate sequences of clay and Sand layers.
Sandy aquifers are confined by clay layers. As per GWRDC well data, Static Water Level (SWL) at
Bopal Village is ~34.85 m in year 1985 and aquifer tapped is between ~129.75 to ~145.47 m.
However, as per discussion with tube well owners during groundwater sampling, depth to water level
in the area is ranging from ~100-120 m.
An additional information was search on net and an authentic information, in the form of paper
published Mr.P.R.Gupte CGWB authority in the year 2011, distinctly tells about groundwater depletion.
The water level has reached to a depth of 90 m bgl. It corroborate with the data cited in above
paragraph which shows water level fall of 2 m per/annum. With depleting water level, people are
tapping dipper aquifers and the water level is cumulative effect of Piezometric head.
Analysis Methodology Ground Water
The samples were collected as grab samples, from each location, once during the study period and the
analysis methodology is given in Table 4.23.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
102
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-23: Analysis Methodology of Ground Water
Sampling Parameters
Sample Analysis
Methodology
pH
pH meter
4500 H+ B
Temperature
Thermometer
2550 B
Turbidity
Nephlometer
2130 B
TDS
Gravimetric
2540 C
Electrical Conductivity
Conductivity Meter
2510 B
COD
Volumetric
5220 B
BOD
Volumetric
IS 3025
Ammonical Nitrogen
Nessler method
4500 NH3
Phenol
S. Photometer
510 C *
Chlorides
Argentometric
4500 cl- B
SO4-2
S. Photometer
4500 SO4-2
SAR
F. Photometer (Na, K) Titration ( Ca and Mg)
Calculation
Total Hardness
Titration
2340 C
Ca++ Hardness
Titration EDTA
3500 Mg B
Mg++ Hardness
Titration EDTA
3500 Mg B
Nitrate
S. Photometer
4500 NO3-2
Sodium
F. Photometer
3500 Na B
Potassium
Flame photometer
3500 K B
Calcium
Titration EDTA
3500 ca B
Magnesium
Titration
3500 Mg B
Salinity
Volumetric
4500 cl- B
Cu (Copper)
S. Photometer
3500 Cu B
Zn (Zinc)
S. Photometer / AAS
3500 Zn B
Coliform Count
Fermentation Tube
9221 B
Faecal Coliform
Multiple Tube Technique
9230 B
Boron
S. Photometer
4500 B C
Ground Water Quality
Sample was collected from twenty different locations to find ground water quality within study area.
Sampling locations are presented in Table 4-24 and photographs of the sampling locations are shown
in Photographs 4-5. Results are given in Table 4-25 to Table 4-27. Sampling locations are shown
in Map 4.2 (A to C)
Table 4-24: Ground Water Quality Sampling Locations
Code
Location
Source
Date of Sampling
Block CB-ONN-2010/1 (Banaskatha District)
GW 1
Dhima village
Tube well
23.12.14
GW 2
Budhanpur
Tube well
24.12.14
GW 3
Vav
Tube well
24.12.14
GW 4
Vasarda
Tube well
24.12.14
GW 5
Kotarvada
Tube well
24.12.14
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
103
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
Code
Location
Source
DESCRIPTION OF THE ENVIRONMENT
Date of Sampling
GW 6
Paldi
Tube well
24.12.14
GW 7
Duchakvada
Tube well
24.12.14
GW 8
Lakhani
Tube well
24.12.14
GW 9
Nardipur
Tube well
16.11.14
GW 10
Soja
Tube well
16.11.14
GW 11
Vagosana
Tube well
16.11.14
GW 12
Golthra
Tube well
16.11.14
GW 13
Dhenthy
Tube well
16.11.14
GW 14
Jamla
Tube well
16.11.14
GW 15
Indrapur
Tube well
16.11.14
Block CB-ONN-2010/6 (Gandhinagar District)
Block CB-ONN-2010/9 (Ahmedabad District)
GW 16
Goraj
GW 17
Khicha
Tube well
29.11.14
GW 18
Daran
Tube well
28.11.14
GW 19
Lodhariya
Tube well
01.12.14
GW 20
Rupavati
Tube well
30.12.14
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Tube well
30.11.14
104
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-25: Analysis Results of Ground Water Samples in Block CB-ONN-2010/1
Sample Location ID
GW 1
GW2
GW3
GW4
GW5
GW6
GW7
GW8
Dhima
Budhanpura
Vav
Vasarda
Kotarwada
Paldi
Duchakvada
Lakhani
Sampling Location
S.
No
.
Parameter
s
Unit
1
pH
2
IS 10500 Standard
Limits for drinking
water
Desirabl
e limit
Permissibl
e limit
pH scale
6.5-8.5
6.5-8.5
7.31
7.41
7.13
7.18
7.15
7.39
7.36
7.31
Temperatur
e
oC
NS
NS
22
22
21
22
21
22
22
21
3
Turbidity
NTU
5
10
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
4
TDS
mg/lit
500
2000
429
1549
2894
4187
1508
1557
789
1004
5
Electrical
conductivity
µmhos/c
m
NS
NS
615
2215
4140
5980
2520
2230
1320
1674
6
COD
mg/lit
NS
NS
<4
<4
<4
<4
<4
<4
<4
<4
7
BOD
mg/lit
NS
NS
<1
<1
<1
<1
<1
<1
<1
<1
8
Phenol
mg/lit
0.001
0.002
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
9
Chlorides
mg/lit
250
1000
164
685
1384
2073
656
651
333
439
10
Sulphates
mg/lit
200
400
37
103
96
129
34
71
60
98
11
Total
Hardness
mg/lit
300
600
230
530
710
780
620
700
320
330
12
Ca++
Hardness
mg/lit
NS
NS
162
134
378
552
228
272
198
184
13
Mg++
Hardness
mg/lit
NS
NS
68
396
332
228
392
428
122
146
14
Total
Alkalinity
mg/lit
200
600
100
120
70
80
70
120
110
100
15
Nitrate
mg/lit
45
100
11.73
7.65
8.84
14.45
40.63
52.79
49.47
66.47
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
105
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample Location ID
DESCRIPTION OF THE ENVIRONMENT
GW 1
GW2
GW3
GW4
GW5
GW6
GW7
GW8
Dhima
Budhanpura
Vav
Vasarda
Kotarwada
Paldi
Duchakvada
Lakhani
Sampling Location
S.
No
.
Parameter
s
Unit
16
Fluoride
17
IS 10500 Standard
Limits for drinking
water
Desirabl
e limit
Permissibl
e limit
mg/lit
1
1.5
0.39
0.38
0.26
0.08
0.58
0.67
0.59
0.98
Sodium
mg/lit
NS
NS
85.3
369
651
1020
325
323
142.3
231.4
18
Potassium
mg/lit
NS
NS
34
3.9
1.1
13
0.6
1.7
2.8
2.8
19
Calcium
mg/lit
75
200
64.93
54
151.5
221
91
109.02
79.36
73.75
20
Magnesium
mg/lit
30
100
16.52
96
80.68
55
95
104
29.65
35.48
21
Salinity
mg/lit
NS
NS
295.39
1234
2493.4
3736
1182
1172.85
599.46
790.59
22
Total
Nitrogen
mg/lit
NS
NS
2.2
1.68
1.68
3.36
8.96
11.76
11.2
15.12
23
Total
Phosphorou
s
mg/lit
NS
NS
<1
<1
<1
<1
<1
<1
<1
<1
24
Dissolved
Oxygen
mg/lit
NS
NS
3.3
3.4
3.6
3.3
3.4
3.7
3.5
3.6
25
Ammonical
Nitrogen
mg/lit
NS
NS
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
26
SAR
-
NS
NS
2.44
7
11
15.84
5.65
5.29
3.45
5.52
27
Heavy Metals
a
Arsenic (as
As)
mg/l
0.05
NR
<0.002
<0.002
<0.002
<0.002
<0.002
<0.002
<0.002
<0.002
b
Cadmium
(as Cd)
mg/l
0.01
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
c
Cromium
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
106
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample Location ID
DESCRIPTION OF THE ENVIRONMENT
GW 1
GW2
GW3
GW4
GW5
GW6
GW7
GW8
Dhima
Budhanpura
Vav
Vasarda
Kotarwada
Paldi
Duchakvada
Lakhani
Sampling Location
S.
No
.
Parameter
s
Unit
IS 10500 Standard
Limits for drinking
water
Desirabl
e limit
Permissibl
e limit
(as Cr)
d
Copper (as
Cu)
mg/l
0.05
1.5
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
e
Cyanide (as
CN)
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
f
Iron (as Fe)
mg/l
0.3
1
0.34
0.34
0.31
0.34
0.32
0.31
0.32
0.34
g
Lead (as Pb)
mg/l
0.05
NR
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
h
Mercury (as
Hg)
mg/l
0.001
NR
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
i
Manganese
(as Mn)
mg/l
0.1
0.3
<0.04
<0.04
<0.04
<0.04
<0.04
<0.04
<0.04
<0.04
j
Nickel (as
Ni)
mg/l
-
-
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
k
Zinc (as Zn)
mg/l
5
15
<0.08
<0.08
<0.08
<0.08
<0.08
<0.08
<0.08
<0.08
28
Total
Coliform
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
Absent
Absent
Absent
29
Faecal
Coliforms
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
Absent
Absent
Absent
Note: NA - Not Applicable, NR - No Relaxation, NS - Not Specified
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
107
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-26: Analysis Results of Ground Water Samples in Block CB-ONN-2010/6
Sample ID
GW9
GW10
GW11
GW12
GW13
GW14
GW15
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
IS 10500 Standard
Limits for drinking water
S.
No.
Parameters
Unit
1
pH
2
Desirable
limit
Permissible
limit
pH scale
6.5-8.5
6.5-8.5
7.10
6.21
6.51
6.62
6.63
6.73
6.90
Temperature
oC
NS
NS
22
23
22
23
23
22
22
3
Turbidity
NTU
5
10
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
4
TDS
mg/lit
500
2000
503
474
600
569
391
547
651
5
Electrical
conductivity
µmhos/cm
NS
NS
788
689
1003
952
668
925
941
6
COD
mg/lit
NS
NS
<5
<5
<5
<5
<5
<5
<5
7
BOD
mg/lit
NS
NS
<2
<2
<2
<2
<2
<2
<2
8
Phenol
mg/lit
0.001
0.002
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
9
Chlorides
mg/lit
250
1000
159
154
202
193
111
193
202
10
Sulphates
mg/lit
200
400
56
48
33
29
23
59
59
11
Total
Hardness
mg/lit
300
600
230
220
350
340
300
340
360
12
Ca++
Hardness
mg/lit
NS
NS
74
100
146
134
82
94
112
13
Mg++
Hardness
mg/lit
NS
NS
156
120
204
75
218
246
248
14
Total
Alkalinity
mg/lit
200
600
60
40
40
50
40
50
600
15
Nitrate
mg/lit
45
100
49.1
56.3
37.8
56.2
26.4
71.8
71.0
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
108
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample ID
DESCRIPTION OF THE ENVIRONMENT
GW9
GW10
GW11
GW12
GW13
GW14
GW15
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
IS 10500 Standard
Limits for drinking water
S.
No.
Parameters
Unit
16
Fluoride
17
Desirable
limit
Permissible
limit
mg/lit
1
1.5
0.25
0.27
0.40
0.29
0.05
0.12
0.33
Sodium
mg/lit
NS
NS
74.5
69.8
97.4
89.3
11.1
88.1
79.5
18
Potassium
mg/lit
NS
NS
3.2
4.2
4.2
3.4
2.6
3.4
3.6
19
Calcium
mg/lit
75
200
30
40
38
54
33
38
45
20
Magnesium
mg/lit
30
100
38
29
50
50
53
60
60
21
Salinity
mg/lit
NS
NS
287
278
365
348
200
348
365
22
Total
Nitrogen
mg/lit
NS
NS
11.20
12.90
8.40
11.20
5.6
16.24
15.7
23
Total
Phosphorous
mg/lit
NS
NS
<1
<1
<1
<1
<1
<1
<1
24
Dissolved
Oxygen
mg/lit
NS
NS
3.3
3.4
3.2
3.5
3.8
3.6
3.4
25
Ammonical
Nitrogen
mg/lit
NS
NS
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
26
SAR
-
NS
NS
2.13
2.00
2.00
2.10
0.28
2.07
1.81
27
Heavy Metals
a
Arsenic (as
As)
mg/l
0.05
NR
<0.002
<0.002
<0.002
<0.002
<0.002
<0.002
<0.002
b
Cadmium (as
Cd)
mg/l
0.01
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
c
Cromium (as
Cr)
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
109
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample ID
DESCRIPTION OF THE ENVIRONMENT
GW9
GW10
GW11
GW12
GW13
GW14
GW15
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
Tube well
IS 10500 Standard
Limits for drinking water
S.
No.
Parameters
Unit
d
Copper (as
Cu)
e
Desirable
limit
Permissible
limit
mg/l
0.05
1.5
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
Cyanide (as
CN)
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
<0.003
f
Iron (as Fe)
mg/l
0.3
1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
g
Lead (as Pb)
mg/l
0.05
NR
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
h
Mercury (as
Hg)
mg/l
0.001
NR
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
i
Manganese
(as Mn)
mg/l
0.1
0.3
<0.04
<0.04
<0.04
<0.04
<0.04
<0.04
<0.04
j
Nickel (as Ni)
mg/l
-
-
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
<0.02
k
Zinc (as Zn)
mg/l
5
15
<0.08
<0.08
<0.08
<0.08
<0.08
<0.08
<0.08
28
Total Coliform
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
Absent
Absent
29
Faecal
Coliforms
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
Absent
Absent
Note: NA - Not Applicable, NR - No Relaxation, NS - Not Specified
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
110
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-27: Analysis Results of Ground Water Samples Block CB-ONN-2010/9
Sample ID
S.
No.
Parameters
1
pH
2
Unit
IS 10500 Standard
Limits for drinking
water
GW16
GW17
GW18
GW19
GW20
Tube well
Tube well
Tube well
Tube well
Tube well
Desirable
limit
Permissible
limit
pH scale
6.5-8.5
6.5-8.5
6.54
6.83
6.74
6.81
7.69
Temperature
oC
NS
NS
21
22
21
22
22
3
Turbidity
NTU
5
10
<0.1
<0.1
<0.1
<0.1
<0.1
4
TDS
mg/lit
500
2000
1675
1295
1555
2092
1718
5
Electrical
conductivity
µmhos/cm
NS
NS
2400
1850
2230
2990
2645
6
COD
mg/lit
NS
NS
<5
<5
<5
<5
<5
7
BOD
mg/lit
NS
NS
<2
<2
<2
<2
<2
8
Phenol
mg/lit
0.001
0.002
<0.001
<0.001
<0.001
<0.001
<0.001
9
Chlorides
mg/lit
250
1000
699
535
617
906
781
10
Sulphates
mg/lit
200
400
263
223
238
300
184
11
Total
Hardness
mg/lit
300
600
570
440
650
620
440
12
Ca++
Hardness
mg/lit
NS
NS
264
120
150
226
310
13
Mg++
Hardness
mg/lit
NS
NS
306
320
500
394
130
14
Total
Alkalinity
mg/lit
200
600
40
50
50
60
180
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
111
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample ID
DESCRIPTION OF THE ENVIRONMENT
GW16
GW17
GW18
GW19
GW20
15
Nitrate
mg/lit
45
100
3.4
0.7
5.4
6.6
7.7
16
Fluoride
mg/lit
1
1.5
0.99
1.35
1.06
0.75
0.82
17
Sodium
mg/lit
NS
NS
283.1
210
230.6
323
289.6
18
Potassium
mg/lit
NS
NS
6
6.2
6.5
7
2.6
19
Calcium
mg/lit
75
200
106
48
60
91
124
20
Magnesium
mg/lit
30
100
74
78
122
96
32
21
Salinity
mg/lit
NS
NS
1260
964
1112
1633
1407
22
Total Nitrogen
mg/lit
NS
NS
0.60
0.20
1.12
1.40
1.68
23
Total
Phosphorous
mg/lit
NS
NS
<1
0.65
0.16
<1
0.24
24
Dissolved
Oxygen
mg/lit
NS
NS
3.5
3.6
3.7
3.5
3.7
25
Ammonical
Nitrogen
mg/lit
NS
NS
<0.01
<0.01
<0.01
<0.01
<0.01
26
SAR
-
NS
NS
5.14
4.00
4.00
5.62
5.99
27
Heavy Metals
a
Arsenic (as
As)
mg/l
0.05
NR
<0.002
<0.002
<0.002
<0.002
<0.002
b
Cadmium (as
Cd)
mg/l
0.01
NR
<0.003
<0.003
<0.003
<0.003
<0.003
c
Cromium (as
Cr)
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
d
Copper (as
Cu)
mg/l
0.05
1.5
<0.05
<0.05
<0.05
<0.05
<0.05
e
Cyanide (as
CN)
mg/l
0.05
NR
<0.003
<0.003
<0.003
<0.003
<0.003
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
112
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Sample ID
DESCRIPTION OF THE ENVIRONMENT
GW16
GW17
GW18
GW19
GW20
f
Iron (as Fe)
mg/l
0.3
1
<0.1
<0.1
0.14
<0.1
0.34
g
Lead (as Pb)
mg/l
0.05
NR
<0.01
<0.01
<0.01
<0.01
<0.01
h
Mercury (as
Hg)
mg/l
0.001
NR
<0.001
<0.001
<0.001
<0.001
<0.001
i
Manganese
(as Mn)
mg/l
0.1
0.3
<0.04
<0.04
<0.04
<0.04
<0.04
j
Nickel (as Ni)
mg/l
-
-
<0.02
<0.02
<0.02
<0.02
<0.02
k
Zinc (as Zn)
mg/l
5
15
<0.08
<0.08
<0.08
<0.08
<0.08
28
Total Coliform
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
29
Faecal
Coliforms
MPN
10/100 ml
10/100 ml
Absent
Absent
Absent
Absent
Absent
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
113
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
It was observed from the analysis report that, all the Parameters are within the permissible Limit
except in Vav and Vasarda village where TDS and Chlorides are higher than permissible limits. This
may be due to formational salinity.
Surface Water Sampling
Surface water samples were collected from nine (9) different locations within the study area and they
are presented in Table 4-28.
Table 4-28: Surface Water Sampling Locations (Pond & canal)
Sample
Code
Location
Date of Sampling
Source
District
SW 1
Goraj
30/11/2014
Pond
Ahmedabad
SW 2
Khicha
29/11/2014
Pond
Ahmedabad
SW 3
Daran
28/11/2014
Pond
Ahmedabad
SW 4
Lodhariya
01/12/2014
Pond
Ahmedabad
SW 5
Nardipur
12/12/2014
Pond
Gandhinagar
SW 6
Soja
12/12/2014
Pond
Gandhinagar
SW 7
Vagosana
10/12/2014
Pond
Gandhinagar
SW 8
Sobhasan
10/12/2014
Pond
Gandhinagar
SW 9
Balva
08/12/2014
Pond
Gandhinagar
Sampling Locations are shown in Map 4.2 (A to C) and Photographs 4-5.
Analysis results are given in Table 4-29 to Table 4-30.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
114
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-29: Analysis Results of Surface Water Samples
S.
No.
Parameters
Unit
Classification for Inland Surface
Water (CPCB)
Surface Water Quality
A
B
C
D
E
SW1
SW2
SW3
SW4
SW5
1
pH
pH Scale
6.5 to
8.5
6.5 to
8.5
6.0 to
9.0
6.5
to
8.5
6.5
to
8.5
7.01
6.94
6.86
6.82
7.04
2
Total Dissolved
Oxgen
mg/l
6.0
5.0
4.0
4.0
NA
4.2
4.1
4.3
4.4
4.1
3
TDS
mg/l
500.0
NA
1500.0
NA
2100
411
455
1145
695
289
4
Electrical
Conductivity
μmohs/cm
NA
NA
NA
1000
2250
587
650
1637
993
415
5
BOD
mg/l
2.0
3.0
3.0
NA
NA
11
10
21
13
5
6
Chlorides(as CL)
mg/l
250
NA
600
NA
600
120
159
433
236
30
7
Sulphate
mg/l
400
NA
400
NA
1000
39
28
140
100
19
8
Nitrate (as NO3)
mg/l
20
NA
50
NA
NA
28.1
7.4
25
6
6.9
9
Fluoride
mg/l
1.5
1.5
1.5
-
-
0.37
0.53
0.45
0.61
0.02
10
Free Ammonia
mg/l
NA
NA
NA
1.2
NA
<0.01
<0.01
<0.01
<0.01
<0.01
11
SAR
mg/gm
NA
NA
NA
NA
26
1.03
1.2
3.67
2.27
0.33
12
Copper
mg/l
1.5
NA
1.5
NA
NA
<0.05
<0.05
<0.05
<0.05
<0.05
13
Iron
mg/l
0.3
NA
50
NA
NA
<0.1
<0.1
<0.1
<0.1
<0.1
14
Arsenic
mg/l
0.05
NA
0.2
NA
NA
<0.002
<0.002
<0.002
<0.002
<0.002
15
Lead
mg/l
0.1
NA
0.1
NA
NA
<0.01
<0.01
<0.01
<0.01
<0.01
16
Zinc
mg/l
15
NA
15
NA
NA
<0.08
<0.08
<0.08
<0.08
<0.08
17
Boron
mg/l
NA
NA
NA
NA
2
<0.02
<0.02
<0.02
<0.02
<0.02
18
Total Coliform
MPN/100ml
50
500
5000
-
-
1200
940
2100
1500
790
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
115
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DESCRIPTION OF THE ENVIRONMENT
Table 4-30: Analysis Results of Surface Water Samples
S.
No.
Parameters
Unit
Surface Water Quality
Classification for Inland Surface Water (CPCB)
A
B
C
D
E
SW6
SW7
SW8
SW9
1
pH
pH Scale
6.5 to
8.5
6.5 to 8.5
6.0 to 9.0
6.5 to 8.5
6.5 to 8.5
7.42
7.35
7.25
7.03
2
Total Dissolved
Oxgen
mg/l
6.0
5.0
4.0
4.0
NA
4.2
4.4
4.2
4.5
3
TDS
mg/l
500.0
NA
1500.0
NA
2100
443
330
317
391
4
Electrical
Conductivity
μmohs/cm
NA
NA
NA
1000
2250
722
475
446
556
5
BOD
mg/l
2.0
3.0
3.0
NA
NA
40
25
8
41
6
Chlorides(as CL)
mg/l
250
NA
600
NA
600
146
86
77
142
7
Sulphate
mg/l
400
NA
400
NA
1000
2
1
15
12
8
Nitrate (as NO3)
mg/l
20
NA
50
NA
NA
7.4
6
22
21.0
9
Fluoride
mg/l
1.5
1.5
1.5
-
-
0.25
0.03
0.21
0.02
10
Free Ammonia
mg/l
NA
NA
NA
1.2
NA
<0.01
<0.01
<0.01
<0.01
11
SAR
mg/gm
NA
NA
NA
NA
26
1.65
0.97
0.8
1.71
12
Copper
mg/l
1.5
NA
1.5
NA
NA
<0.05
<0.05
<0.05
<0.05
13
Iron
mg/l
0.3
NA
50
NA
NA
<0.1
<0.1
<0.1
<0.1
14
Arsenic
mg/l
0.05
NA
0.2
NA
NA
<0.002
<0.002
<0.002
<0.002
15
Lead
mg/l
0.1
NA
0.1
NA
NA
<0.01
<0.01
<0.01
<0.01
16
Zinc
mg/l
15
NA
15
NA
NA
<0.08
<0.08
<0.08
<0.08
17
Boron
mg/l
NA
NA
NA
NA
2
<0.02
<0.02
<0.02
<0.02
18
Total Coliform
MPN/100ml
50
500
5000
-
-
2400
2100
1400
2800
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
116
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Quality of Surface Water
It is observed from the analysis report of surface water samples that:




pH of sample was found to vary from 6.82 (Lodhariya) to 7.42 (Soja Village). All samples
were within the permissible limit (6.5 to 8.5)
TDS of sample was found to vary from 289 mg/l (Nardipur Village) to 1145 mg/l (Daran
Village).
Electrical conductivity in all samples was found to be vary from 415 µmoh/cm (Nardipur
Village to 1637 µmoh/cm (Daran)
Iron content of sample was found to vary from <0. 1 mg/l at all locations
Photographs 4-5: Photographs of Ground Water and Surface water Sampling Locations
4.10
Surface Water Sampling at Goraj Village
Surface Water Sampling at Balva Village
GW Water Sampling at Nardipur Village
GW Water Sampling at Dhenthy Village
Ecology and Bio-Diversity
4.10.1 Study Area
Project Site / Core Zone
Project site (area within the 1 km radius from the proposed well) considered as a core zone for
biodiversity sampling.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
117
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Buffer Zone
Surrounding area up to 10km radius from the project boundary considered as a buffer zone for
biodiversity sampling.
Sensitivity of the Study Area
There is no Reserve Forest, Protected Forest, Wild Life Sanctuary, Biosphere Reserve, Tiger / Elephant
Reserve and Corridor falls in the project study area.
Habitats of the Study Area
Core zone of project study area encompasses mainly scrub vegetation, agriculture land while buffer
zone includes villages, agriculture land and scrub vegetation.
4.10.2 Survey Methodology
Secondary / Desktop Literature Review
No site specific (project site) data is available of flora and fauna, however information available on
websites of Botanical Survey of India (BSI), Zoological Survey of India (ZSI), Gujarat Biodiversity
Board, published literature, research papers have been consulted.
Primary / Field Data Collection
Sampling with standard methods was carried out to understand different floral and faunal components
of the project site. The study area is dominated by scrub, shrubs, small and large trees along with
agricultural fields and water bodies. The field observation on vegetation was made by surveying at
different locations with the help of “Flora of Gujarat by G. L. Shah, topographic maps, forest working
plan. Birds were noted and identified with the help of binocular and standard field identification
guides. Other animals were directly counted from amongst the vegetation, bushes and roadside fields.
Other information regarding wild animals has been collected from the local people. Floral and faunal
details along with other agriculture information have been collected during the field survey.
4.10.3 Baseline Status of Bio diversity
Flora
Core Zone
Overall 35 plant species belonging to 18 families reported from the core zone of the study area of
district Banaskantha. On the behalf of the qualitative analysis, the maximum species were herbs (17)
followed by shrubs (14), trees (6) and climbers & grasses (2 each).
While from the district Gandinagar, a total of 38 species were recorded from the core zone of the
study area, belonging to 19 families. Maximum species belongs to the shrubs and herbs (13 each)
followed by trees (10) and grasses (2).
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
118
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
A total of 41 species belonging to 22 families were recorded from the core zone of the study area of
district Ahmedabad, out of which maximum species belongs to the shrubs (16) followed by trees (14),
herbs (9) and grasses (2).
The species are arranged in alphabetical order. Species names are followed by vernacular names/local
names and species distribution and richness in each well and given in Table 4-31.
Table 4-31: Floral species reported in core Zone CB-ONN-2010/1
S.No.
Scientific Name
Local/Comm
on Name
Family
Code of Well Location
1
2
3
4
5
6
7
8
9
10
√
√
√ - -
√
√
√
-
√
√
-
√
-
-
-
-
√
-
√ - √ √ √
√ √ √
-
1.
Acacia nilotica
2.
Acacia tortilis
3. Azadirachta indica
4. Cordia dichotoma
5. Melia azadarach
6. Phoenix sylvestris
Babul
Israeli Babul
Limdo
Gundo
Bakain
Kahjoor
1. Achyranthes aspera
2. Calotropis procera
3. Capparis decidua
Aghedo
Nano Akdo
Karir
TREES
Fabaceae
Fabaceae
Meliaceae
Boraginaceae
Meliaceae
Arecaceae
SHRUBS
Amaranthaceae
Apocynaceae
Capparaceae
Kawaria
Thor
Fabaceae
Euphorbiaceae
√ √
√ √ √
√
√
-
√
-
Gango
Beshram
Ratanjyot
Lantana
Gandobaval
Pilu
Pilu
Dhaincha
Jhahrberi
Tiliaceae
Convolvulaceae
Euphorbiaceae
Verbenaceae
Fabaceae
Salvadoraceae
Salvadoraceae
Fabaceae
Rhamnaceae
√ - √ √
- √ √
√
√ √ √ √ - √
√ √ √
-
√
-
-
-
-
-
√
√
√
√
√
√
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Cassia italica
Euphorbia
Caducifolia
Grewia tenax
Ipomea carnea
Jatropha cureas
Lantana camara
Prosopis juliflora
Salvadora oleiodes
Salvidora persica
Sesbania sesban
Zizyphus
nummularia
HERBS
Gorakh ganjo Amaranthaceae
Kapok bush Amaranthaceae
Katanudant Amaranthaceae
Aerva lanata
Aerva tomentosa
Amaranthus
spinosus
Amaranthus viridis
Chaulai
Argemone
Darudi
mexicana
Boerhavia diffusa
Punarnava
Convolvulus
Shankhpushpi
prostratus
Crotalaria burhia
Kharshan
Launaea
Moti Bhonpatri
procumbens
Leucas aspera
Kubi
Amaranthaceae
Papaveraceae
-
√
-
-
√
√
-
-
√
-
-
-
√
-
-
√
-
√
-
- √ √
√ - -
√
-
-
-
√
-
-
√
√
-
-
√
-
-
√
-
√
-
-
-
√
-
√
√
√
√
√
√
-
√
√
√
-
√
√
√
√
-
√
√
√
√
√
-
-
√
-
-
√
-
√
-
-
-
-
-
-
-
-
√
-
-
√
√
-
√
-
√
-
√
-
-
√
-
√
-
√
-
-
√
-
√
√
√
√
-
√
√
-
√
-
-
Nyctaginaceae
Convolvulaceae
-
- √
- -
Fabaceae
Asteraceae
-
-
√
-
-
√
√
-
-
√
-
-
-
√
Lamiaceae
-
√ -
-
√
-
-
√
-
-
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
-
-
-
119
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
Scientific Name
Local/Comm
on Name
Family
Kamole
Kantakari
Kateli
Sow Palang
Sharpunkha
Pardesi
Bhangaro
Chhota
Gokhru
Polygonaceae
Solanaceae
Solanaceae
Asteraceae
Fabaceae
Asteraceae
√ √ - - √ - - - √ √
Solanaceae
11. Polygonum glabrum
12. Solanum indicum
13. Solanum surratance
14. Sonchus wightianus
15. Tephrosia purpurea
16. Tridax procumbens
17.
Xanthium
strumarium
1. Coccinia grandis
2. Tinospora cordifolia
1.
2.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Cyndon dactylon
Paspalidium
flavidium
Ghiloda
Gulvel
Darb
Gorju
CLIMBERS
Cucurbitaceae
Menispermaceae
GRASSES
Poaceae
Poaceae
Species Richness
DESCRIPTION OF THE ENVIRONMENT
Code of Well Location
1
2
3
4
5
6
7
8
-
-
-
√
-
-
√
√
-
√
-
-
√
-
-
-
-
√
√ √ -
-
√
-
-
-
√
-
-
-
√ -
-
√
-
√
√
-
√
√
-
√ √ √
- - -
-
-
-
√
10
-
-
√
√
√
√
-
√
-
19 17 16 12 11 13
9
√
√
√
-
-
√
-
√
√
-
-
-
-
17 10 21 12
Floral species observed in Core Zone of CB-ONN-2010/6 is given in Table 4-32.
Table 4-32: List of Floral species observed in the Study Area of CB-ONN-2010/6
S.No.
Scientific Name
Local/Common Name
Family
Code of Well Location
1
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Acacia nilotica
Acacia tortilis
Albizia lebbeck
Azadirachta indica
Cordia dichotoma
Dalbergia sisoo
Derris indica
Mimusops elengi
Mimusops hexandra
Pithecellobium dulce
1.
Achyranthes aspera
2.
Abutilon indicum
3.
Adhatoda vasica
4.
Calotropis procera
5.
Capparis decidua
6.
Cassia italica
7.
Carissa opaca
8.
Euphorbia Caducifolia
9. Indigofera oblongifolia
10.
Prosopis juliflora
11.
Ricinus communis
TREES
Babul
Israeli Babul
Siris
Limdo
Gundo
Sissoo
Karanj
Maulshree
Rayan
Jungle Jalebi
SHRUBS
Aghedo
Kanghi
Ardusi
Nano Akdo
Karir
Kawaria
Karaunda
Thor
Zeel
Gandobaval
Aerando
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Fabaceae
Fabaceae
Fabaceae
Meliaceae
Boraginaceae
Fabaceae
Fabaceae
Sapotaceae
Sapotaceae
Fabaceae
Amaranthaceae
Malvaceae
Acanthaceae
Apocynaceae
Capparaceae
Fabaceae
Apocynaceae
Euphorbiaceae
Fabaceae
Fabaceae
Euphorbiaceae
2
3
4
5
6
7
√ √ √ √ √ - √
- √ - - - - - - √ √ - - - √ - - - - - - √ - √ √ - - - - √ - √
√ √ - - √ - √
- - - - √ - √ - √ - - - √ - - - √ - √
√
-
√
√
-
-
√
√
√
√
-
√
√
-
√
√
√
√
√ √ - - √
-
-
√
-
-
-
√
-
-
√
√
-
-
√
-
√
120
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
12.
13.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1.
2.
Scientific Name
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Local/Common Name
Withania somnifera
Zizyphus nummularia
Ashwaganda
Jhahrberi
HERBS
Aerva lanata
Gorakh ganjo
Aerva tomentosa
Kapok bush
Amaranthus viridis
Chaulai
Boerhavia diffusa
Punarnava
Brassica juncea
Mustard
Cassia occidentalis
Kasonda
Cassia tora
Pumvadiyo/Kawaria
Chenopodium album
Bathua
Datura matel
Dhatura
Sonchus wightianus
Sow Palang
Tephrosia purpurea
Sharpunkha
Typha angustata
Patera
Xanthium strumarium
Chhota Gokhru
GRASSES
Cyndon dactylon
Darb
Cyperus rotundus
Motha
Species Richness
DESCRIPTION OF THE ENVIRONMENT
Family
Code of Well Location
1
2
3
Solanaceae
Rhamnaceae
-
-
√ √
-
√
-
√
-
Amaranthaceae
Amaranthaceae
Amaranthaceae
Nyctaginaceae
Brassicaceae
Fabaceae
Fabaceae
Chenopodiaceae
Solanaceae
Asteraceae
Fabaceae
Typhaceae
Solanaceae
-
-
√
-
-
√
√
√ √ - √
- √
√ √ √
-
-
√
-
Poaceae
Cyperaceae
-
-
4
√
√
-
5
6
7
-
√
√
- - - √ √
- - √ - √
- √ - - √ √
√ - - √ - √
- √
√ - √
- √ - √ - √
√
√ √
-
- - - √ √ - √ - - 15 16 12 10 17 09 13
√ √
√ √
Floral Species observed in study area of Block CB-ONN-2010/9 is given Gazetteer are presented in
Table 4-33.
Table 4-33: List of Floral Species observed in core zone in Block CB-ONN-2010/9
S.No.
Scientific Name
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Acacia nilotica
Aegle marmelos
Azadirachta indica
Balanitis aegyptiaca
Cocos nucifera
Cordia dichotoma
Dalbergia sisoo
Ficus benghalensis
Ficus religiosa
Limonia acidissima
Moringa oleifera
Morus alba
Pithecellobium dulce
Syzygium cumini
1.
2.
Achyranthes aspera
Calotropis procera
Local/Common
Name
Family
TREES
Fabaceae
Rutaceae
Meliaceae
Balanitaceae
Arecaceae
Boraginaceae
Fabaceae
Moraceae
Moraceae
Rutaceae
Moringaceae
Moraceae
Fabaceae
Myrtaceae
SHRUBS
Aghedo
Amaranthaceae
Nano Akdo
Apocynaceae
Babul
Bili
Limdo
Desert date
Nariel
Gundo
Sissoo
Vad
Pipalo
Kaith Bel
Saragvo
Shetur
Goras Amli
Jamun
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Code of Well Location
1
2
3
√
√
-
-
√
√
√
-
√
√
√
-
√
-
√
-
√
-
-
√
√
-
√
4
5
√
-
-
√
√
√
√
√
-
√
-
-
-
√
-
√
√
-
√
√
-
√
√
121
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
Scientific Name
3.
Capparis decidua
4.
Capparis sepiaria
5.
Carissa opaca
6. Euphorbia Caducifolia
7. Indigofera oblongifolia
8.
Jatropha cureas
9.
Prosopis juliflora
10.
Prosopis sinereria
11.
Salvadora oleiodes
12.
Salvidora persica
13.
Sesbania sesban
14.
Sida cordifolia
15. Zizyphus mauritiana
16. Zizyphus nummularia
1.
2.
3.
4.
5.
6.
7.
8.
9.
1.
2.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Local/Common
Name
Karir
kanthar
Karaunda
Thor
Zeel
Ratanjyot
Gandobaval
Khejri
Pilu
Pilu
Dhaincha
Bhuinii
Bordi
Jhahrberi
DESCRIPTION OF THE ENVIRONMENT
Family
Capparaceae
Capparaceae
Apocynaceae
Euphorbiaceae
Fabaceae
Euphorbiaceae
Fabaceae
Fabaceae
Salvadoraceae
Salvadoraceae
Fabaceae
Malvaceae
Rhamnaceae
Rhamnaceae
HERBS
Abutilon glaucum
Khapat
Malvaceae
Ageratum conyzoides
Wild pudina
Asteraceae
Chenopodium album
Bathua
Chenopodiaceae
Datura metel
Dhaturo
Solanaceae
Euphorbia hirta
Duddhi
Euphorbiaceae
Sphaeranthus indicus
Gorakh mundi
Asteraceae
Tephrosia purpurea
Sharpunkha
Fabaceae
Typha angustata
Patera
Typhaceae
Xanthium strumarium
Chhota Gokhru
Solanaceae
GRASSES
Chloris barbata
Mindadiu
Poaceae
Cyndon dactylon
Darb
Poaceae
Species Richness
Code of Well Location
1
2
3
√
-
-
-
-
√
√
-
√
√
-
√
-
4
5
-
-
√
√
√
-
√
-
√
√
√
-
√
-
√
-
√
√
√
-
-
-
√
√
√
-
-
-
√
√
-
-
√
√
√
√
√
√
-
-
-
-
-
√
√
-
-
√
-
-
√
-
-
-
√
√
√
17
16
√
-
√
√
√
13
-
√
-
√
√
√
-
-
√
-
9
18
Buffer Zone
Overall 66 species were reported from buffer zone of district Banaskantha, out of which maximum
species of trees (19) followed by herbs (24), shrubs (17), and climbers & grasses (3 each).
While from the district of Gandhinagar, a total of 87 species were recorded from the buffer zone zone
of the study area. On the behalf of the qualitative analysis, the maximum species were trees (31)
followed by herbs (29), Shrubs (21), and grasses (4) and climbers & twinners (2 each).
In district Ahmedabad, a total of 81 species were recorded from buffer zone, out of which maximum
34 species of trees followed by herbs (23), shrubs (21), and grasses (3).
Table 4-34: List of Floral Species observed in Buffer zone in Block CB-ONN-2010/1
S No.
1.
2.
3.
Scientific Name
Acacia nilotica
Acacia Senegal
Acacia tortilis
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Local/Common Name
TREES
Babul
Gorad
Israeli Babul
Family
Fabaceae
Fabaceae
Fabaceae
122
OIL AND NATURAL GAS CORPORATION
LIMITED
S No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Aegle marmelos
Azadirachta indica
Butea monosperma
Cassia fistula
Cordia dichotoma
Dalbergia sisoo
Delonix regia
Diosphros Montana
Emblica officinalis
Ficus benghalensis
Madhuca latifolia
Melia azadarach
Peltophorum pterocarpum
Phoenix sylvestris
Pletophorum pterocarpum
Tamarindus indica
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Achyranthes aspera
Balanites roxburghii
Calotropis procera
Capparis decidua
Cassia italica
Euphorbia Caducifolia
Grewia tenax
Indigofera oblongifolia
Ipomea carnea
Jatropha cureas
Lantana camara
Prosopis juliflora
Prosopis sinereria
Salvadora oleiodes
Salvidora persica
Sesbania sesban
Zizyphus nummularia
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Aerva lanata
Aerva tomentosa
Aeschynomene procumbens
Amaranthus spinosus
Amaranthus viridis
Argemone mexicana
Bacopa monnieri
Blumea eriantha
Boerhavia diffusa
Cassia tora
Celosia argentea
Colocasia esculenta
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Bili
Limdo
Khakhro
Amaltas
Gundo
Sissoo
Gulmohar
Dheki
Amla
Vad
Mahua
Bakain
Copper pod
Kahjoor
Gulmohar
Amli
SHRUBS
Aghedo
Ingor
Nano Akdo
Karir
Kawaria
Thor
Gango
Zeel
Beshram
Ratanjyot
Lantana
Gandobaval
Khejri
Pilu
Pilu
Dhaincha
Jhahrberi
HERBS
Gorakh ganjo
Kapok bush
-Katanudant
Chaulai
Darudi
Bam
Kapuriyo kalhar
Punarnava
Pumvadiyo/Kawaria
Lalmurga
Pattarveliya
Family
Rutaceae
Meliaceae
Fabaceae
Fabaceae
Boraginaceae
Fabaceae
Fabaceae
Ebenaceae
Euphorbiaceae
Moraceae
Sapotaceae
Meliaceae
Fabaceae
Arecaceae
Fabaceae
Fabaceae
Amaranthaceae
Zygophyllaceae
Apocynaceae
Capparaceae
Fabaceae
Euphorbiaceae
Tiliaceae
Fabaceae
Convolvulaceae
Euphorbiaceae
Verbenaceae
Fabaceae
Fabaceae
Salvadoraceae
Salvadoraceae
Fabaceae
Rhamnaceae
Amaranthaceae
Amaranthaceae
Fabaceae
Amaranthaceae
Amaranthaceae
Papaveraceae
Scrophulariaceae
Asteraceae
Nyctaginaceae
Fabaceae
Amaranthaceae
Araceae
123
OIL AND NATURAL GAS CORPORATION
LIMITED
S No.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Convolvulus prostratus
Crotalaria burhia
Launaea procumbens
Leucas aspera
Polygonum glabrum
Solanum indicum
Solanum surratance
Sonchus wightianus
Tephrosia purpurea
Tridax procumbens
Typha angustata
Xanthium strumarium
1.
2.
3.
Coccinia grandis
Mucuna pruriens
Tinospora cordifolia
1.
2.
3.
Cyndon dactylon
Dendrocalamus strictus
Paspalidium flavidium
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Shankhpushpi
Kharshan
Moti Bhonpatri
Kubi
Kamole
Kantakari
Kateli
Sow Palang
Sharpunkha
Pardesi Bhangaro
Patera
Chhota Gokhru
CLIMBERS
Ghiloda
Kuvech
Gulvel
GRASSES
Darb
Narvans
Gorju
Family
Convolvulaceae
Fabaceae
Asteraceae
Lamiaceae
Polygonaceae
Solanaceae
Solanaceae
Asteraceae
Fabaceae
Asteraceae
Typhaceae
Solanaceae
Cucurbitaceae
Fabaceae
Menispermaceae
Poaceae
Poaceae
Poaceae
Table 4-35: List of Floral Species observed in Buffer zone in Block CB-ONN-2010/6
S.No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
Scientific Name
Acacia nilotica
Acacia Senegal
Acacia tortilis
Aegle marmelos
Alangium lamarkii
Albizia lebbeck
Azadirachta indica
Butea monosperma
Casearia tomentosa
Cassia fistula
Cassia siamea
Cordia dichotoma
Dalbergia sisoo
Delonix regia
Derris indica
Diosphros Montana
Emblica officinalis
Ficus benghalensis
Ficus glomerata
Ficus infectoria
Ficus religiosa
Gymnosporia Montana
Holoptelea integrifolia
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Local/Common Name
TREES
Babul
Gorad
Israeli Babul
Bili
Ankol
Siris
Limdo
Khakhro
Umbh
Amaltas
Kasid
Gundo
Sissoo
Gulmohar
Karanj
Dheki
Amla
Vad
Gular
Pipli
Pipalo
Viklo
Charal
Family
Fabaceae
Fabaceae
Fabaceae
Rutaceae
Cornaceae
Fabaceae
Meliaceae
Fabaceae
Salicaceae
Fabaceae
Fabaceae
Boraginaceae
Fabaceae
Fabaceae
Fabaceae
Ebenaceae
Euphorbiaceae
Moraceae
Moraceae
Moraceae
Moraceae
Celastraceae
Ulmaceae
124
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
24.
25.
26.
27.
28.
29.
30.
31.
Madhuca latifolia
Mangifera indica
Melia azadarach
Mimusops elengi
Mimusops hexandra
Peltophorum ferrugineum
Pithecellobium dulce
Tamarindus indica
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
Achyranthes aspera
Abutilon indicum
Adhatoda vasica
Balanites roxburghii
Calotropis procera
Capparis decidua
Cassia auriculata
Cassia italica
Carissa opaca
Euphorbia Caducifolia
Holarrhena antidysenterica
Indigofera oblongifolia
Ipomea carnea
Jatropha cureas
Prosopis juliflora
Ricinus communis
Tecoma stans
Vitex negundo
Withania somnifera
Zizyphus mauritiana
Zizyphus nummularia
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Aerva lanata
Aerva tomentosa
Aeschynomene indica
Amaranthus spinosus
Amaranthus viridis
Argemone mexicana
Bacopa monnieri
Blumea eriantha
Boerhavia diffusa
Brassica juncea
Cassia occidentalis
Cassia tora
Catharanthus roseus
Chenopodium album
Colocasia esculenta
Corchorus olitorius
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Mahua
Ambo
Bakain
Maulshree
Rayan
Copper pod
Jungle Jalebi
Amli
SHRUBS
Aghedo
Kanghi
Ardusi
Ingor
Nano Akdo
Karir
Aval
Kawaria
Karaunda
Thor
Kado
Zeel
Beshram
Ratanjyot
Gandobaval
Aerando
Vasant
Nagod
Ashwaganda
Bordi
Jhahrberi
HERBS
Gorakh ganjo
Kapok bush
Budda pea
Katanudant
Chaulai
Darudi
Bam
Kapuriyo kalhar
Punarnava
Mustard
Kasonda
Pumvadiyo/Kawaria
Barmasi
Bathua
Pattarveliya
Chhunchho
Family
Sapotaceae
Anacardiaceae
Meliaceae
Sapotaceae
Sapotaceae
Fabaceae
Fabaceae
Fabaceae
Amaranthaceae
Malvaceae
Acanthaceae
Zygophyllaceae
Apocynaceae
Capparaceae
Fabaceae
Fabaceae
Apocynaceae
Euphorbiaceae
Apocynaceae
Fabaceae
Convolvulaceae
Euphorbiaceae
Fabaceae
Euphorbiaceae
Bignoniaceae
Verbenaceae
Solanaceae
Rhamnaceae
Rhamnaceae
Amaranthaceae
Amaranthaceae
Fabaceae
Amaranthaceae
Amaranthaceae
Papaveraceae
Scrophulariaceae
Asteraceae
Nyctaginaceae
Brassicaceae
Fabaceae
Fabaceae
Apocynaceae
Chenopodiaceae
Araceae
Malvaceae
125
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Datura matel
Hygrophila auriculata
Leucas aspera
Martynia diandra
Physalis minima
Polygonum glabrum
Portulaca oleracea
Solanum nigrum
Sonchus wightianus
Tephrosia purpurea
Tridax procumbens
Typha angustata
Xanthium strumarium
1.
2.
Coccinia grandis
Ipomoea pestigridis
1.
2.
Abrus precatorius
Ipomoea quamoclit
1.
2.
3.
4.
Cymbopogon martini
Cyndon dactylon
Cyperus rotundus
Dendrocalamus strictus
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Dhatura
Kantashelio
Kubi
Vinchu
Rasbhari
Kamole
Motiluni
Piludi
Sow Palang
Sharpunkha
Pardesi Bhangaro
Patera
Chhota Gokhru
CLIMBERS
Ghiloda
Vagpadi
TWINNERS
Chanothi
Kamlata
GRASSES
Roicha Ghas
Darb
Motha
Narvans
Family
Solanaceae
Acanthaceae
Lamiaceae
Martyniaceae
Solanaceae
Polygonaceae
Portulacaceae
Solanaceae
Asteraceae
Fabaceae
Asteraceae
Typhaceae
Solanaceae
Cucurbitaceae
Convolvulaceae
Fabaceae
Convolvulaceae
Poaceae
Poaceae
Cyperaceae
Poaceae
Table 4-36: List of Floral Species observed in Buffer zone in Block CB-ONN-2010/9
S.No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Scientific Name
Aegle marmelos
Acacia nilotica
Ailanthus excelsa
Albizia lebbeck
Alstonia scholaris
Azadirachta indica
Balanitis aegyptiaca
Butea monosperma
Cassia fistula
Cassia siamea
Casuarina equisetifolia
Cocos nucifera
Cordia dichotoma
Dalbergia sisoo
Delonix regia
Emblica officinalis
Ficus benghalensis
Ficus racemosa
Ficus religiosa
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Local/Common Name
TREES
Bili
Babul
Rukhdo
Siris
Saptaparni
Limdo
Desert date
Khakhro
Amaltas
Kasid
Saru
Nariel
Gundo
Sissoo
Gulmohar
Amla
Vad
Gular
Pipalo
Family
Rutaceae
Fabaceae
Simaroubaceae
Fabaceae
Apocynaceae
Meliaceae
Balanitaceae
Fabaceae
Fabaceae
Fabaceae
Casuarinaceae
Arecaceae
Boraginaceae
Fabaceae
Fabaceae
Euphorbiaceae
Moraceae
Moraceae
Moraceae
126
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
Holoptelea integrifolia
Limonia acidissima
Madhuca latifolia
Mangifera indica
Melia azedarach
Moringa oleifera
Morus alba
Peltophorum pterocarpum
Phoenix sylvestris
Pithecellobium dulce
Pletophorum pterocarpum
Polyalthia longifolia
Syzygium cumini
Tamarindus indica
Tectona grandis
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
Achyranthes aspera
Calotropis procera
Capparis decidua
Capparis sepiaria
Carissa opaca
Euphorbia Caducifolia
Grewia tenax
Holarrhena antidysenterica
Indigofera oblongifolia
Jatropha cureas
Prosopis juliflora
Prosopis sinereria
Ricinus communis
Salvadora oleiodes
Salvidora persica
Sesbania sesban
Sida cordifolia
Tecoma stans
Vitex negundo
Zizyphus mauritiana
Zizyphus nummularia
1.
2.
3.
4.
5.
6.
7.
8.
9.
Abutilon glaucum
Ageratum conyzoides
Amaranthus spinosus
Amaranthus viridis
Argemone mexicana
Bacopa monnieri
Blumea mollis
Boerhavia diffusa
Cassia tora
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Charal
Kaith Bel
Mahua
Ambo
Bakain
Saragvo
Shetur
Copper pod
Kahjoor
Goras Amli
Gulmohar
Asopalav
Jamun
Amli
Sag
SHRUBS
Aghedo
Nano Akdo
Karir
kanthar
Karaunda
Thor
Gango
Kado
Zeel
Ratanjyot
Gandobaval
Khejri
Aerando
Pilu
Pilu
Dhaincha
Bhuinii
Vasant
Nagod
Bordi
Jhahrberi
HERBS
Khapat
Wild pudina
Katanudant
Chaulai
Darudi
Bam
Bhutaco
Punarnava
Pumvadiyo/Kawaria
Family
Ulmaceae
Rutaceae
Sapotaceae
Anacardiaceae
Meliaceae
Moringaceae
Moraceae
Fabaceae
Arecaceae
Fabaceae
Fabaceae
Annonaceae
Myrtaceae
Fabaceae
Lamiaceae
Amaranthaceae
Apocynaceae
Capparaceae
Capparaceae
Apocynaceae
Euphorbiaceae
Tiliaceae
Apocynaceae
Fabaceae
Euphorbiaceae
Fabaceae
Fabaceae
Euphorbiaceae
Salvadoraceae
Salvadoraceae
Fabaceae
Malvaceae
Bignoniaceae
Verbenaceae
Rhamnaceae
Rhamnaceae
Malvaceae
Asteraceae
Amaranthaceae
Amaranthaceae
Papaveraceae
Scrophulariaceae
Asteraceae
Nyctaginaceae
Fabaceae
127
OIL AND NATURAL GAS CORPORATION
LIMITED
S.No.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Chenopodium album
Datura metel
Euphorbia hirta
Gnaphalium indicum
Ipomoea aquatica
Ocimum canum
Polygonum glabrum
Solanum indicum
Solanum nigrum
Solanum xanthocarpum
Sphaeranthus indicus
Tephrosia purpurea
Typha angustata
Xanthium strumarium
Chloris barbata
Cyndon dactylon
Dendrocalamus strictus
1.
2.
3.
DESCRIPTION OF THE ENVIRONMENT
Local/Common Name
Bathua
Dhaturo
Duddhi
Phulvo
Nali ni Bhaji
Basil
Kamole
Kantakari
Piludi
Bhoyringni
Gorakh mundi
Sharpunkha
Patera
Chhota Gokhru
GRASSES
Mindadiu
Darb
Narvans
Family
Chenopodiaceae
Solanaceae
Euphorbiaceae
Asteraceae
Convolvulaceae
Lamiaceae
Polygonaceae
Solanaceae
Solanaceae
Solanaceae
Asteraceae
Fabaceae
Typhaceae
Solanaceae
Poaceae
Poaceae
Poaceae
Fauna
Core Zone
Overall 35 species were reported from the core zone of the study area of district Banaskantha. On the
behalf of the qualitative analysis, the maximum species of Birds (24) followed by Mammals and
reptiles (7 each) were reported from the core zone.
While, from the core zone of district Gandhinagar, a total of 38 species were reported out of which,
maximum species of birds (29) were reported followed by the mammals (6) and herpetofauna (3).
From the district Ahmedabad, overall 49 species were reported.The maximum species of birds (39)
followed by mammals and reptiles (5 each) were reported on the basis of direct and indirect evidences
from the core zone.
The detailed list of species is arranged in alphabetical order. Species names are followed by
common/English names, status and species distribution and richness in each well given in table below
Table 4-37: List of Fauna in the Core Zone of CB-ONN-2010/1
S.
No.
Scientific
Name
Common
Name
IWPA,
1972/
1
IUCN
Category
MAMMALS
1.
Boselaphus
tragocemalus
Nilgai
III
2.
Funambulus
pennanti
Striped
squirrel
3.
Herpeste
edwardsi
Mongoose
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Code of Well Location
2
3
4
5
6
7
8
9
10
√
-
√
-
-
√
√
-
√
-
IV
√
√
-
√
√
-
√
-
√
-
II
√
-
√
-
-
√
√
-
√
√
128
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific
Name
Common
Name
4.
Hystrix indica
Indian
porcupine
5.
Lepus
nigricollis
Black napped
Hare
6.
Lepus
nigricollis
dayanus
7.
Presbytis
entellus
IWPA,
1972/
IUCN
Category
IV
DESCRIPTION OF THE ENVIRONMENT
Code of Well Location
1
2
3
4
5
6
7
8
9
10
-
-
√
-
-
-
√
-
-
√
IV
-
-
√
√
√
-
-
√
Desert Hare
IV
-
-
√
-
√
-
-
√
-
-
Common
Languor
II
-
√
√
-
√
-
√
-
√
√
√
REPTILES
1.
Bungarus
caeruleus
Common Krait
IV
-
-
√
-
-
-
-
-
-
√
2.
Eryx Conicus
Sand Boa
IV
-
-
-
√
√
-
-
√
-
-
3.
Naja naja
Cobra
II
√
-
-
-
-
√
-
√
-
-
Rat snake
II
-
-
√
-
-
-
√
-
-
-
√
√
√
-
√
-
4. Ptyas mucosus
BIRDS
1.
Acredotheres
tristis
Common Myna
IV
2.
Anthus
novaeseelandi
ae
Paddy field
Pipit
IV
√
-
-
√
-
3.
Apus affinis
House swift
IV
-
√
-
-
-
-
4.
Ardeola grayii
Pond Heron
IV
-
√
-
√
-
√
5.
Bulbulcus ibis
Cattle Egret
IV
√
√
-
-
-
√
6.
Columba livia
Blue Rock
Pigeon
IV
√
√
√
-
-
7.
Copsychus
saularis
Magpie Robin
LC
√
-
√
√
8.
Corvus
macrorhyncho
s
Jungle Crow
LC
√
√
-
9.
Corvus
splendens
Common Crow
V
√
√
Black Drongo
IV
√
10. Dicrurusadsimi
√
√
√
√
-
-
-
-
-
√
-
-
-
√
√
-
√
-
√
√
-
√
-
√
√
√
-
√
√
√
-
√
-
-
√
-
-
-
-
√
√
√
-
-
√
-
-
√
√
-
lis
11.
Halcyon
smyrensis
White
Breasted
Kingfisher
IV
-
-
√
-
-
√
-
-
√
-
12.
Merops
orientalis
Small Green
Bee-Eater
LC
√
-
-
√
-
√
-
√
√
-
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
129
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
Scientific
Name
Common
Name
13.
Milvus
migrans
Pariah Kite
IWPA,
1972/
IUCN
Category
LC
14.
Motacilla
cinerea
Grey Wagtail
15.
Nectarinia
asiatica
16.
Passer
domesticus
DESCRIPTION OF THE ENVIRONMENT
Code of Well Location
1
2
3
4
5
6
7
8
9
10
-
-
√
-
√
-
-
-
-
-
IV
-
-
√
-
-
√
-
-
√
-
Purple Sunbird
LC
-
√
√
-
-
√
√
-
-
√
House
Sparrow
LC
-
√
√
-
-
-
√
-
√
√
Little
Cormorant
IV
√
√
-
-
-
-
-
√
-
niger
18.
Psittacula
krameri
Rose ringed
Parakeet
IV
√
-
-
-
√
-
√
-
√
√
19.
Pycnonotus
cafer
Red vented
Bulbul
IV
-
√
√
√
-
√
-
√
√
√
20.
Streptoplia
tranquebarica
Red Turtle
Dove
IV
-
√
√
-
√
-
√
√
√
-
21.
Sturnus
pagodarum
Brahminy
Myna
IV
-
-
√
-
√
-
-
-
-
√
22.
Turdoides
caudatus
Common
Babbler
LC
√
√
√
-
-
-
√
-
√
-
23.
Turdoides
striatus
Jungle Babbler
IV
√
√
√
24.
Vanellus
indicus
Red Wattled
Lapwing
LC
√
-
√
√
-
√
-
√
√
√
1
7
1
6
2
2
1
0
1
2
1
5
1
3
1
0
2
4
16
17. Phalacrocorax
Species Richness
√
Table 4-38: List of Fauna in the Core Zone of Block CB-ONN-2010/6
S.
No.
Scientific Name
Common Name
Schedule/
IUCN
Category
Code of Well Location
1
2
3
4
5
6
7
-
√
√
-
√
-
-
MAMMALS
1.
Nilgai
III
2.
Boselaphus
tragocemalus
Funambulus pennanti
Striped Squirrel
IV
√
-
√
√
-
-
√
3.
Lepus nigricollis
Indian Hare
IV
√
-
-
√
-
-
-
4.
Presdbytis entellus
Common Langur
II
-
√
-
√
-
-
-
5.
Rattus sp.
Rats
V
-
-
√
√
-
√
√
III
-
-
-
-
√
-
-
6.
Sus scrofa
Wild Pig
REPTILES
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
130
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Common Name
1.
Eryx johnii
2.
Naja naja
3.
Ptyas mucosa
DESCRIPTION OF THE ENVIRONMENT
Red Sand Boa
Schedule/
IUCN
Category
LC
Code of Well Location
-
√
-
-
-
√
-
Cobra
II
-
-
√
√
-
-
-
Rat Snake
II
√
-
-
-
-
-
-
Bank Myna
IV
√
-
-
√
-
-
√
Common Myna
IV
-
√
√
√
-
-
√
Paddy field Pipit
IV
-
√
-
-
√
√
-
Grey Heron
IV
√
-
-
√
√
√
-
BIRDS
1.
2.
3.
Acredotheres
ginginianus
Acredotheres tristis
4.
Anthus
novaeseelandiae
Ardea cinerea
5.
Ardeola grayii
Pond Heron
IV
√
√
-
√
√
-
√
6.
Bulbulcus ibis
Cattle Egret
IV
√
-
-
-
√
-
√
7.
Columba livia
Blue Rock Pigeon
IV
√
-
-
√
√
-
√
8.
Copsychus saularis
Magpie Robin
LC
-
√
√
-
-
-
-
9.
Coracias benghalensis
Indian Roller
LC
√
√
-
-
-
-
√
10.
Corvus macrorhynchos
Jungle Crow
LC
-
√
-
√
√
-
√
11.
Dicrurusadsimilis
Black Drongo
IV
√
-
√
√
-
√
√
12.
Eudynamys scolopacea
Indian Koel
IV
-
√
√
-
√
-
-
13.
Halcyon smyrensis
IV
√
-
√
√
√
√
-
14.
IV
√
-
-
-
-
-
-
15.
Himantopus
himantopus
Hirundo rustica
White Breasted
Kingfisher
Black winged Stilt
House Swallow
IV
√
-
√
√
-
-
-
16.
Merops orientalis
LC
√
-
-
√
√
√
√
17.
Motacilla cinerea
Small Green BeeEater
Grey Wagtail
IV
√
-
√
√
-
-
√
18.
Passer domesticus
House Sparrow
LC
-
-
√
-
√
√
√
19.
Phalacrocorax niger
Little Cormorant
IV
√
-
-
-
-
-
-
20.
Psittacula krameri
IV
√
√
√
-
√
-
√
21.
Pycnonotus cafer
Rose ringed
Parakeet
Red vented Bulbul
IV
√
√
-
√
√
√
-
22.
Saxicoloides fulicata
Indian Robin
LC
√
√
-
√
-
-
√
23.
Sterna ablifrons
River Tern
LC
√
-
-
-
-
-
-
24.
Red Turtle Dove
IV
-
√
-
√
-
√
√
Black Headed Ibis
IV
√
-
√
√
-
-
√
26.
Streptoplia
tranquebarica
Threskiornis
melanocephalus
Tringa hypoleucos
IV
√
-
-
-
-
-
-
27.
Turdoides caudatus
Common
Sandpiper
Common Babbler
LC
√
√
√
-
√
√
-
28.
Turdoides striatus
Jungle Babbler
IV
√
-
√
-
√
√
√
29.
Vanellus indicus
Red Wattled
Lapwing
LC
√
-
√
√
-
√
√
25.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
131
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
Scientific Name
Common Name
DESCRIPTION OF THE ENVIRONMENT
Schedule/
IUCN
Category
Species Richness
Code of Well Location
25
15
17
21
16
13
19
Table 4-39: List of Fauna in Core Zone of CB-ONN-2010/9
S.
No.
Scientific Name
Common Name Schedule/IUCN
Category
1.
Funambulus pennati Striped squirrel
2.
Herpestes edwardsii
Lepus nigricollis
3.
4.
5.
Presbytis entellus
Rattus spp.
2.
Naja naja
Eryx johnii
3.
Lissemys punctata
4.
Ptyas mucosus
1.
MAMMALS
IV
Code of Well Location
1
2
3
4
5
√
-
√
√
√
Mongoose
II
-
√
√
-
-
Black napped
Hare
Common Langur
IV
√
-
-
√
√
II
√
-
√
√
-
Rat
V
√
√
√
-
√
-
√
-
√
-
Cobra
REPTILE
II
Red Sand Boa
IV
-
-
√
-
√
India softshelled turtle
I, Part II
√
-
-
-
-
Rat Snake
IV
-
√
-
√
-
BIRDS
Bank Myna
IV
√
-
-
-
√
Common Myna
IV
√
-
√
√
-
3.
Acridotheres
ginginianus
Acridotheres tristis
Ardea alba
Large Egret
IV
√
√
-
-
√
4.
Ardea cinerea
Grey Heron
IV
√
√
-
-
√
5.
Ardeola grayii
Columba livia
Pond heron
IV
√
√
-
-
√
Blue Rock
Pigeon
Indian Roller
IV
-
-
√
√
√
IV
√
-
√
-
√
√
1.
2.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Coracias
benghalensis
Dicrurus adsimilis
Egretta garzetta
Egretta intermedia
Halcyon smyrensis
Himantopus
himantopus
Merops orientalis
IV
√
-
√
-
Little Egret
IV
√
√
-
-
-
Smaller Egret
IV
-
-
-
-
√
White Breasted
Kingfisher
Black winged
Stilt
Small Green
Bee-Eater
House Sparrow
IV
√
√
-
-
√
IV
√
√
-
-
√
IV
-
-
√
√
√
Passer domesticus
Phalacrocorax niger Little Cormorant
Pseudibid papillosa
Black Ibis
Psittacula krameri
Roseringed
Pycnonotus cafer
19. Saxicoloides fulicata
20.
Black drongo
Streptoplia
Parakeet
Red vented
Bulbul
Indian Robin
Red Turtle Dove
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
IV
√
-
√
-
-
IV
√
-
-
-
-
IV
√
√
IV
√
-
√
-
-
IV
-
√
-
√
-
√
IV
-
-
√
-
√
IV
-
√
√
-
√
132
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
21.
22.
Scientific Name
Common Name Schedule/IUCN
Category
tranquebarica
Threskiornis
melanocephalus
Tringa hypoleucos
Upupa epops
Vanellus indicus
23.
24.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Black Headed
Ibis
Common
Sandpiper
Hoopoe
Red Wattled
Lapwing
Species Richness
DESCRIPTION OF THE ENVIRONMENT
Code of Well Location
1
2
3
4
5
IV
√
√
-
-
√
IV
√
√
-
-
√
IV
-
√
-
√
-
IV
√
√
√
-
√
22
17
15
11
20
Buffer Zone
Overall 50 species were reported from the buffer zone of the study area of district Banaskantha. On
the behalf of the qualitative analysis, the maximum species were Birds (40) followed by Mammals (6)
and herpetofauna (4).
While, from the buffer zone of district Gandhinagar, a total of 47 species were reported out of which,
maximum species of birds (36) were reported followed by the mammals (7) and herpetofauna (4).
From the district Ahmedabad, overall 49 species were reported.The maximum species of birds (39)
followed by mammals and reptiles (5 each) were reported on the basis of direct and indirect
evidences.
Detailed lists of species followed by common/English names along with threatened status have been
tabulated in the following tables
Table 4-40: List of Fauna in Buffer Zone of CB-ONN-2010/1
S. No.
Scientific Name
Common Name
IWPA, 1972/
IUCN Category
MAMMALS
1.
Boselaphus tragocemalus
Nilgai
III,LC
2.
Funambulus pennanti
Striped squirrel
IV,LC
3.
Herpeste edwardsi
Mongoose
II
4.
Hystrix indica
Indian porcupine
IV,LC
5.
Lepus nigricollis
Black napped Hare
IV,LC
6.
Lepus nigricollis dayanus
Desert Hare
IV,LC
7.
Presbytis entellus
Common Languor
II,LC
8.
Sus scrofa
Wild Boar
III,LC
9.
Vulpes bengalensis
Indian Fox
II,LC
REPTILES
1.
Eryx Conicus
Sand Boa
IV
2.
Ptyas mucosus
Rat snake
II
3.
Bungarus caeruleus
Common Krait
IV
4.
Naja naja
Cobra
II
BIRDS
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
133
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
DESCRIPTION OF THE ENVIRONMENT
Common Name
IWPA, 1972/
IUCN Category
1.
Acredotheres ginginianus
Bank Myna
IV
2.
Acredotheres tristis
Common Myna
IV
3.
Anthus novaeseelandiae
Paddy field Pipit
IV
4.
Apus affinis
House swift
IV
5.
Ardea cinerea
Grey Heron
IV
6.
Ardeola grayii
Pond Heron
IV
7.
Bulbulcus ibis
Cattle Egret
IV
8.
Centropus sinensis
Crow-pheasant
IV
9.
Ceryle rudis
Pied Kingfisher
IV
10.
Columba livia
Blue Rock Pigeon
IV
11.
Copsychus saularis
Magpie Robin
LC
12.
Coracias benghalensis
Indian Roller
LC
13.
Corvus macrorhynchos
Jungle Crow
LC
14.
Corvus splendens
Common Crow
V
15.
Dicrurusadsimilis
Black Drongo
IV
16.
Elanus caerulus
Black winged Kite
LC
17.
Eudynamys scolopacea
Indian Koel
IV
18.
Halcyon smyrensis
White Breasted Kingfisher
IV
19.
Himantopus himantopus
Black winged Stilt
IV
20.
Lanius excubitor
Grey shrike
IV
21.
Merops orientalis
Small Green Bee-Eater
LC
22.
Milvus migrans
Pariah Kite
LC
23.
Motacilla cinerea
Grey Wagtail
IV
24.
Nectarinia asiatica
Purple Sunbird
LC
25.
Orthotomus sutorius
Tailor Bird
LC
26.
Passer domesticus
House Sparrow
LC
27.
Phalacrocorax niger
Little Cormorant
IV
28.
Psittacula krameri
Rose ringed Parakeet
IV
29.
Pycnonotus cafer
Red vented Bulbul
IV
30.
Rhipidura aureola
Fantail Flycatcher
IV
31.
Saxicoloides fulicata
Indian Robin
LC
32.
Sterna ablifrons
River Tern
LC
33.
Streptoplia tranquebarica
Red Turtle Dove
IV
34.
Sturnus pagodarum
Brahminy Myna
IV
35.
Himatopus himantopus
Black winged Stilt
LC
36.
Francolinus pondicerianus
Grey Francolin
LC
37.
Tringa hypoleucos
Common Sandpiper
IV
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
134
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Common Name
DESCRIPTION OF THE ENVIRONMENT
IWPA, 1972/
IUCN Category
38.
Turdoides caudatus
Common Babbler
LC
39.
Turdoides striatus
Jungle Babbler
IV
40.
Vanellus indicus
Red Wattled Lapwing
LC
I, II, III, IV & V are Schedules of Indian Wildlife Protection Act, 1972.
LC- Least Concern, EN-Endangered, NT- Near Threatened, VU-Vulnerable, R-Rare are the status assigned by
IUCN
Table 4-41: List of Fauna in Buffer Zone of CB-ONN-2010/6
S. No.
Scientific Name
Common Name
Schedule/
IUCN Category
MAMMALS
1.
Boselaphus tragocemalus
Nilgai
III
2.
Funambulus pennanti
Striped Squirrel
IV
3.
Lepus nigricollis
Indian Hare
IV
4.
Presdbytis entellus
Common Langur
II
5.
Rattus sp.
Rats
V
6.
Sus scrofa
Wild Pig
III
7.
Vulpes begalensis
Indian Fox
II
REPTILES
1.
Eryx johnii
Red Sand Boa
LC
2.
Lycodon aulicus
Common Wolf Snake
LC
3.
Naja naja
Cobra
II
4.
Ptyas mucosa
Rat Snake
II
1.
Acredotheres ginginianus
Bank Myna
IV
2.
Acredotheres tristis
Common Myna
IV
3.
Anthus novaeseelandiae
Paddy field Pipit
IV
4.
Ardea cinerea
Grey Heron
IV
5.
Ardeola grayii
Pond Heron
IV
6.
Bulbulcus ibis
Cattle Egret
IV
7.
Columba livia
Blue Rock Pigeon
IV
8.
Copsychus saularis
Magpie Robin
LC
9.
Coracias benghalensis
Indian Roller
LC
10.
Corvus macrorhynchos
Jungle Crow
LC
11.
Corvus splendens
Common Crow
V
12.
Dicrurusadsimilis
Black Drongo
IV
13.
Elanus caeruelus
Black winged Kite
IV
14.
Eudynamys scolopacea
Indian Koel
IV
BIRDS
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
135
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
DESCRIPTION OF THE ENVIRONMENT
Common Name
Schedule/
IUCN Category
15.
Halcyon smyrensis
White Breasted Kingfisher
IV
16.
Himantopus himantopus
Black winged Stilt
IV
17.
Hirundo rustica
House Swallow
IV
18.
Lanius excubitor
Grey shrike
IV
19.
Merops orientalis
Small Green Bee-Eater
LC
20.
Milvus migrans
Pariah Kite
LC
21.
Motacilla cinerea
Grey Wagtail
IV
22.
Nectarinia asiatica
Purple Sunbird
LC
23.
Orthotomus sutorius
Tailor Bird
LC
24.
Passer domesticus
House Sparrow
LC
25.
Phalacrocorax niger
Little Cormorant
IV
26.
Psittacula krameri
Rose ringed Parakeet
IV
27.
Pycnonotus cafer
Red vented Bulbul
IV
28.
Rhipidura aureola
Fantail Flycatcher
IV
29.
Saxicoloides fulicata
Indian Robin
LC
30.
Sterna ablifrons
River Tern
LC
31.
Streptoplia tranquebarica
Red Turtle Dove
IV
32.
Threskiornis melanocephalus
Black Headed Ibis
IV
33.
Tringa hypoleucos
Common Sandpiper
IV
34.
Turdoides caudatus
Common Babbler
LC
35.
Turdoides striatus
Jungle Babbler
IV
36.
Vanellus indicus
Red Wattled Lapwing
LC
I,II, III, IV & V are Schedules of Indian Wildlife Protection Act, 1972.
LC- Least Concern, EN-Endangered, NT- Near Threatened, VU-Vulnerable, R-Rare are the status assigned by
IUCN
Table 4-42: List of Fauna in Buffer Zone of CB-ONN-2010/9
S. No.
Scientific Name
1.
Funambulus pennati
2.
Herpestes edwardsii
Lepus nigricollis
Presbytis entellus
Rattus spp.
3.
4.
5.
2.
Naja naja
Eryx johnii
3.
4.
1.
Common Name
MAMMALS
Striped squirrel
Schedule/IUCN Category
IV
Mongoose
II
Black napped Hare
IV
Common Langur
II
Rat
V
REPTILE
Cobra
II
Red Sand Boa
IV
Lissemys punctata
India soft-shelled turtle
I, Part II
Ptyas mucosus
Rat Snake
IV
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
136
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
5.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scientific Name
Vipera ruselli
DESCRIPTION OF THE ENVIRONMENT
Common Name
Schedule/IUCN Category
Russel’s viper
II
BIRDS
Bank Myna
Common Myna
4.
Acridotheres ginginianus
Acridotheres tristis
Apus affinis
Ardea alba
5.
Ardea cinerea
Grey Heron
IV
6.
Ardeola grayii
Bulbulcus ibis
Centropus sinensis
Columba livia
Copsychus saularis
Coracias benghalensis
Corvus splendens
Dicrurus adsimilis
Edynamys scolopacea
Egretta garzetta
Egretta intermedia
Elanus caeruleus
Grus antigone
Halcyon smyrensis
Hirundo rustica
Himantopus himantopus
Merops orientalis
Milvus migrans govinda
Nectarinia asiatica
Orthotomus sutorius
Passer domesticus
Pavo cristatus
Phalacrocorax niger
Pseudibid papillosa
Psittacula krameri
Pycnonotus cafer
Saxicoloides fulicata
Steptopedila chinensis
Streptoplia tranquebarica
Threskiornis aethiopica
Threskiornis melanocephalus
Tringa hypoleucos
Upupa epops
Vanellus indicus
Pond heron
IV
Cattle Egret
IV
1.
2.
3.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
IV
IV
House swift
IV
Large Egret
IV
Crow-pheasant
IV
Blue Rock Pigeon
IV
Magpie Robin
IV
Indian Roller
IV
House Crow
V
Black drongo
IV
Koel
IV
Little Egret
IV
Smaller Egret
IV
Blackwinged Kite
IV
Sarus crane
IV
White Breasted Kingfisher
IV
House Swallow
IV
Black winged Stilt
IV
Small Green Bee-Eater
IV
Pariah kite
IV
Purple Sunbird
IV
Tailer bird
IV
House Sparrow
IV
Common Peafowl
I
Little Cormorant
IV
Black Ibis
IV
Roseringed Parakeet
IV
Red vented Bulbul
IV
Indian Robin
IV
Spotted dove
IV
Red Turtle Dove
IV
White Ibis
IV
Black Headed Ibis
IV
Common Sandpiper
IV
Hoopoe
IV
Red Wattled Lapwing
IV
I, II, III, IV & V are Schedules of Indian Wildlife Protection Act, 1972.
LC- Least Concern, EN-Endangered, NT- Near Threatened, VU-Vulnerable, R-Rare are the status assigned by
IUCN
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
137
OIL AND NATURAL GAS CORPORATION
LIMITED
4.11
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
Socio-Economics
4.11.1 Methodology
The study was conducted for various socio-economic components with respect to demographic
structure, infrastructure development, health & economic status, religious and cultural attributes,
awareness and opinion of the people about the upcoming project. The basic amenities data has been
abstracted from Census 2001 of Gujarat State, obtained from Office of Registrar General India, New
Delhi and Provisional Census Data 2011.
In accordance with this secondary data, field surveys were carried out in the study area within the
selected villages of the blocks. The primary data was generated through site observation, interviews
with the key-informants and focused group discussions in the villages falling within the study area. In
addition, random interactions were also held with the stakeholders like adult male/female,
schoolteachers, anganwadi workers, PHC in-charge and gramsevaks. Furthermore, they were asked to
attend the public hearing as fixed by the authorities where they can put their opinions and views
about the upcoming project.
Photographs 4-6: Photographs of Method of Data Collection in the Study Area
Meeting with Key Informants of the Study Area
4.11.2 Population Distribution
The statistics regarding the human population and the number of dwelling units of villages in the
study area is given in Table 4-43.
Table 4-43: List of Villages Population and Dwelling Units in the Study Area
S. No.
District
Taluka
Village
HH_2011
Pop_2011
Core Area Villages
1
Banaskantha
Vav
Fangadi
250
1308
2
Banaskantha
Vav
Dheriana
187
1014
3
Banaskantha
Vav
Takhatpura
113
636
4
Banaskantha
Vav
Pratappura
166
916
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
138
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
5
Banaskantha
Vav
Dhima
1249
Pop_2011
6592
6
Banaskantha
Vav
Sapreda
527
3008
7
Banaskantha
Vav
Bhakhari
548
2977
8
Banaskantha
Vav
Gambhirpura
239
1305
9
Banaskantha
Vav
Chuva
533
2891
10
Banaskantha
Vav
Golgam
481
2623
11
Banaskantha
Vav
Uchpa
426
2499
12
Banaskantha
Vav
Sardarpura
96
478
13
Banaskantha
Vav
Reluchi
76
398
14
Banaskantha
Vav
Vav
2286
12034
15
Banaskantha
Vav
Ravla
82
366
16
Banaskantha
Vav
Khimanavas
948
4994
17
Banaskantha
Vav
Malsan
307
1641
18
Banaskantha
Vav
Khimana Padar
416
2137
19
Banaskantha
Vav
Chandarva
362
2013
20
Banaskantha
Vav
Madka
939
5131
21
Banaskantha
Vav
Morikha
658
3632
22
Banaskantha
Vav
Bhatvar Vas
255
1494
23
Banaskantha
Vav
Bhachali
324
1849
24
Banaskantha
Vav
Dharadhara
604
3378
25
Banaskantha
Vav
Dendava
4621
2489
26
Banaskantha
Vav
Dethali
679
3699
27
Banaskantha
Vav
Tithgam
617
3298
28
Banaskantha
Vav
Baiyak
341
1856
29
Banaskantha
Vav
Savpura
151
783
30
Banaskantha
Vav
Janavada
284
1491
31
Banaskantha
Vav
Ishvariya
155
900
32
Banaskantha
Vav
Bahisara
158
804
33
Banaskantha
Vav
Vasarda
447
2608
34
Banaskantha
Vav
Bhankhod
111
631
35
Banaskantha
Vav
Rampura
316
1834
36
Banaskantha
Vav
Kalyanpura
108
598
37
Banaskantha
Vav
Eta
436
2398
38
Banaskantha
Vav
Lalpura
330
1767
39
Banaskantha
Tharad
Mahadevpura
116
654
40
Banaskantha
Tharad
Idhata
570
3178
41
Banaskantha
Tharad
Charda
524
2947
42
Banaskantha
Tharad
Dodgam
630
3369
43
Banaskantha
Deodar
Rantila
817
5138
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
139
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
44
Banaskantha
Deodar
Vajegadh
321
Pop_2011
1965
45
Banaskantha
Deodar
Kotarwada
1095
6380
46
Banaskantha
Deodar
Golvo
60
298
47
Banaskantha
Deodar
Golvi
572
3487
48
Banaskantha
Deodar
Sesan Nava
210
1271
49
Banaskantha
Deodar
Manpura Dhunsol
166
1158
50
Banaskantha
Deodar
Dhunsol
324
2440
51
Banaskantha
Deodar
Paldi
805
4976
52
Banaskantha
Deodar
Mojru Juna
511
3134
53
Banaskantha
Deodar
Manpura Jalodha
168
1006
54
Banaskantha
Deodar
Rampura
257
1841
55
Banaskantha
Deodar
Khanodar
474
2851
56
Banaskantha
Deodar
Sardarpura (Ravel)
305
1897
57
Banaskantha
Deodar
Duchakwada
707
3899
58
Banaskantha
Bhabhar
Sanesda
583
3686
59
Banaskantha
Bhabhar
Vajapur Nava
367
2039
60
Banaskantha
Bhabhar
Vajapur Juna
327
1769
61
Banaskantha
Bhabhar
Devkapdi
387
2265
62
Banaskantha
Bhabhar
Mera
462
2760
63
Banaskantha
Bhabhar
Khari Paldi
381
2367
64
Banaskantha
Bhabhar
Harkudiya
249
1293
65
Gandhinagar
Mansa
Boru
992
5085
66
Gandhinagar
Kalol
Vagosana
339
1461
67
Gandhinagar
Kalol
Jamla
946
4261
68
Gandhinagar
Kalol
Dhendhu
260
1204
69
Gandhinagar
Kalol
Sobhasan
353
1692
70
Gandhinagar
Kalol
Nadri
186
926
71
Gandhinagar
Kalol
Itla
360
1698
72
Gandhinagar
Kalol
Nava
164
812
73
Gandhinagar
Kalol
Nardipur
1643
7757
74
Ahmedabad
Bavla
Dhedhal
603
3146
75
Ahmedabad
Bavla
Vasna Dhedhal
478
2748
76
Ahmedabad
Sanand
Lodariyal
378
1818
77
Ahmedabad
Sanand
Daran
745
3651
78
Ahmedabad
Sanand
Juwal
886
4545
79
Ahmedabad
Sanand
Modasar
1053
5410
80
Ahmedabad
Sanand
Juda
424
2330
81
Ahmedabad
Sanand
Kodaliya
191
1009
82
Ahmedabad
Sanand
Fangdi
537
2932
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
140
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
Pop_2011
83
Ahmedabad
Sanand
Khicha
449
2217
84
Ahmedabad
Sanand
Lekhamba
302
1785
85
Ahmedabad
Sanand
Goraj
973
4879
86
Ahmedabad
Sanand
Vasodara
276
1394
87
Ahmedabad
Sanand
Rupavati
227
1180
88
Ahmedabad
Sanand
Vasna Iyava
571
2624
89
Ahmedabad
Sanand
Khoda
360
1929
41,751
227,031
Total
Buffer Area Villages
1
Banaskantha
Vav
Kareli
489
2721
2
Banaskantha
Vav
Baluntri
423
2158
3
Banaskantha
Vav
Vajiyasara
154
875
4
Banaskantha
Vav
Haripura
74
485
5
Banaskantha
Vav
Rabadi Padar
118
668
6
Banaskantha
Vav
Chandangadh
146
821
7
Banaskantha
Vav
Chothar Nesda
396
2290
8
Banaskantha
Vav
Tadav
836
4647
9
Banaskantha
Vav
Kolava
299
1808
10
Banaskantha
Vav
Umedpura
224
1178
11
Banaskantha
Vav
Rachhena
390
2194
12
Banaskantha
Vav
Achhuva
264
1444
13
Banaskantha
Vav
Nalodar
307
1822
14
Banaskantha
Vav
Lodrani
253
1484
15
Banaskantha
Vav
Bukna
575
3215
16
Banaskantha
Vav
Vavdi
466
2471
17
Banaskantha
Vav
Asaravas
277
1495
18
Banaskantha
Vav
Golap
304
1606
19
Banaskantha
Vav
Jelana
401
2163
20
Banaskantha
Vav
Khardol
242
1354
21
Banaskantha
Vav
Devpura (Suigam)
84
473
22
Banaskantha
Vav
Devpura (Talsari)
105
617
23
Banaskantha
Vav
Kanothi
485
2717
24
Banaskantha
Vav
Golap Nesda
304
1606
25
Banaskantha
Vav
Bharadava
977
5230
26
Banaskantha
Vav
Koreti
306
1743
27
Banaskantha
Vav
Mamana
221
1405
28
Banaskantha
Vav
Limbala
339
1842
29
Banaskantha
Vav
Dhanana
210
1143
30
Banaskantha
Vav
Khadol
270
1444
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
141
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
Pop_2011
31
Banaskantha
Vav
Chala
364
2014
32
Banaskantha
Vav
Motipura
134
715
33
Banaskantha
Vav
Benap
1046
5888
34
Banaskantha
Vav
Sedav
257
1366
35
Banaskantha
Vav
Kumbharkha
315
1847
36
Banaskantha
Vav
Bhatasana
222
1427
37
Banaskantha
Vav
Radka
315
1909
38
Banaskantha
Vav
Uchosan
608
3636
39
Banaskantha
Vav
Dudhva
379
2045
40
Banaskantha
Tharad
Tharad
5154
27954
41
Banaskantha
Tharad
Rampura
378
2470
42
Banaskantha
Tharad
Patiyasara
187
1065
43
Banaskantha
Tharad
Rajkot
377
1977
44
Banaskantha
Tharad
Jampur
254
1417
45
Banaskantha
Tharad
Saba
268
1728
46
Banaskantha
Tharad
Gadsisar
310
1938
47
Banaskantha
Tharad
Medhala
228
1185
48
Banaskantha
Tharad
Bhorol
692
3870
49
Banaskantha
Tharad
Ganeshpura
334
1869
50
Banaskantha
Tharad
Savpura
494
3008
51
Banaskantha
Tharad
Bhadodar
281
1633
52
Banaskantha
Tharad
Bhapi
443
2568
53
Banaskantha
Tharad
Bhapdi
335
1863
54
Banaskantha
Tharad
Hathawada
166
889
55
Banaskantha
Tharad
Vami
413
2668
56
Banaskantha
Tharad
Lorwada
365
2087
57
Banaskantha
Tharad
Jamda
490
2709
58
Banaskantha
Tharad
Lunal
265
1643
59
Banaskantha
Tharad
Dudhva
612
3724
60
Banaskantha
Tharad
Janadi
268
1457
61
Banaskantha
Tharad
Dolatpura
184
1062
62
Banaskantha
Tharad
Chudmer
443
2641
63
Banaskantha
Tharad
Budhanpur
332
1848
64
Banaskantha
Tharad
Abhepura
186
1049
65
Banaskantha
Tharad
Khanpur
378
2162
66
Banaskantha
Tharad
Nagala
428
2276
67
Banaskantha
Tharad
Malupur
632
3487
68
Banaskantha
Tharad
Gela
541
3786
69
Banaskantha
Tharad
Peparal
337
2209
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
142
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
Pop_2011
70
Banaskantha
Tharad
Jetda
858
4432
71
Banaskantha
Tharad
Lunawa
460
2811
72
Banaskantha
Tharad
Moti Pavad
398
2213
73
Banaskantha
Tharad
Nani Pavad
293
1636
74
Banaskantha
Tharad
Jandla
230
1271
75
Banaskantha
Tharad
Sanadhar
99
644
76
Banaskantha
Tharad
Del
400
2256
77
Banaskantha
Tharad
Sanavia
562
3311
78
Banaskantha
Tharad
Asasan
469
2587
79
Banaskantha
Deesa
Jasara
459
3183
80
Banaskantha
Deesa
Moral
452
2741
81
Banaskantha
Deesa
Lakhani
1931
11154
82
Banaskantha
Deesa
Vasna (Vatam)
793
4644
83
Banaskantha
Deesa
Manaki
427
2965
84
Banaskantha
Deesa
Agthala
917
5225
85
Banaskantha
Deodar
Lembau
513
3159
86
Banaskantha
Deodar
Achhavadiya
199
1135
87
Banaskantha
Deodar
Kuwana
368
2356
88
Banaskantha
Deodar
Lavana
970
5561
89
Banaskantha
Deodar
Chalva
524
3051
90
Banaskantha
Deodar
Sanav
376
2408
91
Banaskantha
Deodar
Daua
135
792
92
Banaskantha
Deodar
Chibhda
736
4341
93
Banaskantha
Deodar
Makhanu
260
1420
94
Banaskantha
Deodar
Makdala
384
2394
95
Banaskantha
Deodar
Dera
332
1920
96
Banaskantha
Deodar
Jalodha
484
2545
97
Banaskantha
Deodar
Narana
147
909
98
Banaskantha
Deodar
Vatam Nava
402
2319
99
Banaskantha
Deodar
Kunvata
487
3118
100
Banaskantha
Deodar
Vatam Juna
318
1751
101
Banaskantha
Deodar
Navapura
279
1622
102
Banaskantha
Deodar
Forna
612
3647
103
Banaskantha
Deodar
Kotda Forna
456
2386
104
Banaskantha
Deodar
Ravel
594
3368
105
Banaskantha
Deodar
Nokha
501
2984
106
Banaskantha
Deodar
Vadiya
645
3772
107
Banaskantha
Deodar
Dhrandvada
234
1277
108
Banaskantha
Deodar
Bhesana
646
3904
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
143
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
109
Banaskantha
Deodar
Jada
614
Pop_2011
3978
110
Banaskantha
Deodar
Chamanpura
202
1176
111
Banaskantha
Deodar
Chagwada
308
1949
112
Banaskantha
Deodar
Liladhar
253
1595
113
Banaskantha
Deodar
Soni
628
3441
114
Banaskantha
Deodar
Jasali
324
1900
115
Banaskantha
Deodar
Odha
328
1897
116
Banaskantha
Deodar
Dhanakwada
795
4520
117
Banaskantha
Deodar
Kotda Deodar
769
4307
118
Banaskantha
Deodar
Ludara
754
4525
119
Banaskantha
Deodar
Vakha
473
2758
120
Banaskantha
Deodar
Sanadar
149
780
121
Banaskantha
Deodar
Raiya
1006
5590
122
Banaskantha
Deodar
Surana
521
2804
123
Banaskantha
Deodar
Mulakpur
327
1885
124
Banaskantha
Bhabhar
Radakiya
136
845
125
Banaskantha
Bhabhar
Balodhan
577
3256
126
Banaskantha
Bhabhar
Asana
517
3075
127
Banaskantha
Bhabhar
Kuvala
749
4425
128
Banaskantha
Bhabhar
Barvala
555
3027
129
Banaskantha
Bhabhar
Bhem Bordi
407
2365
130
Banaskantha
Bhabhar
Suthar Nesdi
448
2804
131
Banaskantha
Bhabhar
Tetarva
365
2046
132
Banaskantha
Bhabhar
Chatara
389
2295
133
Banaskantha
Bhabhar
Chaladara
189
1151
134
Banaskantha
Bhabhar
Chembuva
315
1895
135
Banaskantha
Bhabhar
Nesda
308
1892
136
Banaskantha
Bhabhar
Mitha
761
4625
137
Banaskantha
Bhabhar
Vadana
322
1904
138
Banaskantha
Bhabhar
Abala
281
1753
139
Banaskantha
Kankrej
Zalmor
444
2625
140
Mahesana
Vijapur
Motipura
239
948
141
Mahesana
Vijapur
Titodan
756
3562
142
Mahesana
Mahesana
Dhandhusan
455
2119
143
Mahesana
Mahesana
Gojhariya
2999
13933
144
Mahesana
Mahesana
Charadu
1117
5865
145
Mahesana
Mahesana
Langhnaj
1926
9182
146
Mahesana
Mahesana
Saldi
628
2890
147
Mahesana
Mahesana
Vadasma
1336
6522
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
144
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
148
Mahesana
Mahesana
Hadvi
160
Pop_2011
780
149
Mahesana
Kadi
Karjisan
661
2971
150
Mahesana
Kadi
Dangarva
1129
5355
151
Mahesana
Kadi
Vadu
828
3909
152
Mahesana
Kadi
Narola
485
2527
153
Mahesana
Kadi
Jhulasan
1073
5046
154
Mahesana
Kadi
Anandpura
255
1180
155
Gandhinagar
Mansa
Harnahoda
948
4906
156
Gandhinagar
Mansa
Samou
1395
6844
157
Gandhinagar
Mansa
Padusma
677
3141
158
Gandhinagar
Mansa
Charada
2190
10595
159
Gandhinagar
Mansa
Dhameda
737
3895
160
Gandhinagar
Mansa
Amarpura
276
1428
161
Gandhinagar
Mansa
Ridrol
1401
6188
162
Gandhinagar
Mansa
Kharna
635
2989
163
Gandhinagar
Mansa
Solaiya
844
4282
164
Gandhinagar
Mansa
Bapupura
567
2656
165
Gandhinagar
Mansa
Parsa
649
3218
166
Gandhinagar
Mansa
Khata Amba
497
2436
167
Gandhinagar
Mansa
Itadara
1701
8295
168
Gandhinagar
Mansa
Fatehpura
271
1486
169
Gandhinagar
Mansa
Gulabpura
299
1391
170
Gandhinagar
Mansa
Badpura
715
3339
171
Gandhinagar
Mansa
Mansa (M)
6458
30347
172
Gandhinagar
Kalol
Himmatpura
138
649
173
Gandhinagar
Mansa
Indrapura
456
2130
174
Gandhinagar
Mansa
Rampura
416
1964
175
Gandhinagar
Mansa
Manekpur Makakhad
1312
6135
176
Gandhinagar
Mansa
Veda
1199
5528
177
Gandhinagar
Mansa
Ambod
423
1904
178
Gandhinagar
Mansa
Parbatpura
792
3608
179
Gandhinagar
Mansa
Dholakuva
820
4042
180
Gandhinagar
Mansa
Rajpura
273
1317
181
Gandhinagar
Mansa
Delvad
676
3466
182
Gandhinagar
Mansa
Bhimpura
139
662
183
Gandhinagar
Kalol
Khorajdabhi
680
3340
184
Gandhinagar
Kalol
Limbodara
1272
5922
185
Gandhinagar
Kalol
Bhavpura
222
1051
186
Gandhinagar
Kalol
Paliyad
1144
5442
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
145
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
187
Gandhinagar
Mansa
Amarapur
339
Pop_2011
1653
188
Gandhinagar
Kalol
Soja
1639
7377
189
Gandhinagar
Kalol
(2) Rampura
45
227
190
Gandhinagar
Kalol
Pratappura
377
2054
191
Gandhinagar
Kalol
(1) Pratappura
126
555
192
Gandhinagar
Kalol
Amaja
600
3035
193
Gandhinagar
Kalol
Balva
1330
6504
194
Gandhinagar
Kalol
Aluva
427
2069
195
Gandhinagar
Kalol
Mubarakpura
421
2113
196
Gandhinagar
Kalol
Golthara
1060
5350
197
Gandhinagar
Gandhinagar
Sadra
1205
5989
198
Gandhinagar
Gandhinagar
Unava
1474
6769
199
Gandhinagar
Kalol
Dingucha
732
3284
200
Gandhinagar
Gandhinagar
Pindharada
418
1858
201
Gandhinagar
Kalol
Mokhasan
574
2841
202
Gandhinagar
Gandhinagar
Vasan
816
3995
203
Gandhinagar
Gandhinagar
Chekhalarani
197
976
204
Gandhinagar
Gandhinagar
Piplaj
615
2907
205
Gandhinagar
Gandhinagar
Rupal
1323
6587
206
Gandhinagar
Gandhinagar
Dolarana Vasana
905
4394
207
Gandhinagar
Kalol
Pansar
1874
8438
208
Gandhinagar
Kalol
Bhadol
225
1076
209
Gandhinagar
Gandhinagar
Sardhav
1675
7703
210
Gandhinagar
Kalol
Vadavsvami
245
1186
211
Gandhinagar
Gandhinagar
Randheja
2555
12205
212
Gandhinagar
Gandhinagar
Sonipur
426
2135
213
Gandhinagar
Kalol
Isand
817
3881
214
Gandhinagar
Kalol
Dhamasna
1022
4864
215
Gandhinagar
Gandhinagar
Jalund
417
2113
216
Gandhinagar
Gandhinagar
Adraj Moti
1839
9355
217
Gandhinagar
Gandhinagar
Kolavada
3764
17846
218
Gandhinagar
Kalol
Arsodiya
1198
5859
219
Gandhinagar
Gandhinagar
Gandhinagar
63168
292797
220
Gandhinagar
Gandhinagar
Bhoyan Rathod
499
2499
221
Gandhinagar
Gandhinagar
Titoda
1461
7144
222
Ahmedabad
Bavla
Nanodara
622
3329
223
Ahmedabad
Bavla
Kavla
403
1958
224
Ahmedabad
Bavla
Sankod
535
2724
225
Ahmedabad
Bavla
Rajoda
680
3232
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
146
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
Pop_2011
226
Ahmedabad
Bavla
Kavitha
1480
7591
227
Ahmedabad
Bavla
Rasam
621
3020
228
Ahmedabad
Bavla
Adroda
553
2474
229
Ahmedabad
Bavla
Hasannagar
299
1504
230
Ahmedabad
Bavla
Chhabasar
362
1756
231
Ahmedabad
Bavla
Baldana
608
3081
232
Ahmedabad
Bavla
Bavla
9089
42458
233
Ahmedabad
Bavla
Lagdana
234
1168
234
Ahmedabad
Bavla
Dahegamda
416
2089
235
Ahmedabad
Bavla
Ranesar
230
1140
236
Ahmedabad
Bavla
Amipura
107
611
237
Ahmedabad
Bavla
Kochariya
587
3036
238
Ahmedabad
Bavla
Rupal
944
4418
239
Ahmedabad
Bavla
Saljada
321
1423
240
Ahmedabad
Bavla
Juval Rupavati
322
1566
241
Ahmedabad
Bavla
Zekda
274
1298
242
Ahmedabad
Bavla
Kerala
348
1560
243
Ahmedabad
Bavla
Chiyada
616
3034
244
Ahmedabad
Bavla
Sakodara
399
1924
245
Ahmedabad
Bavla
Dhanwada
409
2093
246
Ahmedabad
Bavla
Bhayla
532
2597
247
Ahmedabad
Bavla
Kalyangadh
245
1232
248
Ahmedabad
Dholka
Dholka (M+OG)
16584
80945
249
Ahmedabad
Dholka
Badarkha
1966
10002
250
Ahmedabad
Dholka
Saroda
920
4534
251
Ahmedabad
Dholka
Chandisar
1001
4698
252
Ahmedabad
Dholka
Vasna Keliya
1220
5776
253
Ahmedabad
Dholka
Chaloda
1772
8641
254
Ahmedabad
Dholka
Shekhdi
136
672
255
Ahmedabad
Dholka
Sindhraj
558
2577
256
Ahmedabad
Dholka
Ranoda
443
2122
257
Ahmedabad
Dholka
Lana
267
1522
258
Ahmedabad
Dholka
Maflipur (OG)
299
1414
259
Ahmedabad
Daskroi
Bhat
1176
5858
260
Ahmedabad
Sanand
Sanand
8628
41530
261
Ahmedabad
Sanand
Virochannagar
1371
7081
262
Ahmedabad
Sanand
Dodar
487
2421
263
Ahmedabad
Sanand
Naranpura
121
612
264
Ahmedabad
Sanand
Iyava
514
2525
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
147
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
265
Ahmedabad
Sanand
Rampura
107
Pop_2011
459
266
Ahmedabad
Sanand
Anadej
838
4408
267
Ahmedabad
Sanand
Bhavanpur
217
1087
268
Ahmedabad
Sanand
Chekhla
924
4774
269
Ahmedabad
Sanand
Garodiya
330
1831
270
Ahmedabad
Sanand
Godhavi
751
3669
271
Ahmedabad
Sanand
Nidhrad
871
4451
272
Ahmedabad
Sanand
Chharodi
512
2655
273
Ahmedabad
Sanand
Khoraj
779
3903
274
Ahmedabad
Sanand
Zolapur
881
4807
275
Ahmedabad
Sanand
Shiyawada
452
2256
276
Ahmedabad
Sanand
Kalana
411
2003
277
Ahmedabad
Sanand
Bol
454
2150
278
Ahmedabad
Sanand
Manipur
582
2875
279
Ahmedabad
Sanand
Kaneti
379
1891
280
Ahmedabad
Sanand
Shela
896
4277
281
Ahmedabad
Sanand
Sanathal
1242
6251
282
Ahmedabad
Sanand
Telav
712
3512
350
1872
283
Ahmedabad
Sanand
Sanand (Rural)
(Gibpura)
284
Ahmedabad
Sanand
Kunvar
891
4504
285
Ahmedabad
Sanand
Hirapur
395
2026
286
Ahmedabad
Sanand
Charal
419
1985
287
Ahmedabad
Sanand
Bakrana
430
2085
288
Ahmedabad
Sanand
Daduka
440
2360
289
Ahmedabad
Sanand
Melasana
339
1912
290
Ahmedabad
Sanand
Makhiyav
757
3887
291
Ahmedabad
Sanand
Vinchhiya
480
2427
292
Ahmedabad
Sanand
Soyla
422
2230
293
Ahmedabad
Sanand
Kolat
813
4327
294
Ahmedabad
Sanand
Navapura
792
3756
295
Ahmedabad
Sanand
Changodar
1861
7873
296
Ahmedabad
Sanand
Moraiya
1540
6783
297
Ahmedabad
Sanand
Moti Devti
594
3232
298
Ahmedabad
Sanand
Pipan
684
3337
299
Ahmedabad
Sanand
Nani Devti
521
2458
300
Ahmedabad
Sanand
Mankol
1120
5862
301
Ahmedabad
Sanand
Kundal
419
2016
302
Ahmedabad
Sanand
Rethal
718
3585
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
148
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
S. No.
District
Taluka
Village
HH_2011
303
Ahmedabad
Sanand
Govinda
188
Pop_2011
844
304
Ahmedabad
Sanand
Matoda
468
2597
305
Ahmedabad
Sanand
Sari
372
2040
306
Ahmedabad
Sanand
Palwada
359
1899
307
Ahmedabad
Sanand
Tajpur
267
1200
308
Ahmedabad
Sanand
Vasna Chacharavadi
555
2513
309
Ahmedabad
Viramgam
Sachana
787
3844
310
Ahmedabad
Viramgam
Ogan
851
3906
311
Gandhinagar
Kalol
Nasmed
578
2879
312
Gandhinagar
Kalol
Adhana
106
581
313
Gandhinagar
Kalol
Mulasana
226
1172
314
Gandhinagar
Kalol
Vayana
294
1456
315
Gandhinagar
Kalol
Vansajada Dhedia
288
1490
316
Gandhinagar
Kalol
Unali
286
1419
317
Gandhinagar
Kalol
Rancharada
832
3924
318
Gandhinagar
Kalol
Palodiya
349
1724
319
Mehsana
Kadi
Thol
1415
6866
320
Mehsana
Kadi
Kanjari
324
1622
321
Mehsana
Kadi
Medha
338
1420
322
Mehsana
Kadi
Agol
947
4502
323
Mehsana
Kadi
Panthoda
469
2401
324
Mehsana
Kadi
Nadan
260
1427
325
Mehsana
Kadi
Khanderavpura
325
1283
326
Mehsana
Kadi
Govindpura
157
612
327
Mehsana
Kadi
Chandrasan
444
2240
328
Mehsana
Kadi
Yashvantpura
170
631
298,672
1,491,045
Total
Source: Primary Census Abstract 2011
The study area has been bifurcated into core and buffer area. The core area includes the villages that
comes inside the block demarcation where as the buffer area consists of the villages that are outside
the block demarcation. The above table shows that the entire study area consists of 417 villages
across the districts of Banaskantha, Gandhinagar and Ahmedabad out of which 89 villages are in the
core area where as 328 villages are in the buffer area.
The core area villages has the population of 187,807 and the number of households to be 32,902
whereas the buffer area has the population of 1,325,110 and 255,579 households in 2001.The
household size in 2001 of the core and buffer area are approximately 6 and 5 respectively. The sex
ratio of the core and the buffer area respectively are 930 and 913 in 2001. Similarly, in 2011 the
population and households of the core area are 227,031 and 41,751 and of the buffer area are
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
149
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
1,491,045 and 298,672 respectively. The household size in the core and buffer area during 2011 are
approximately 5 each.
It can be inferred that there is 21 percent increase in population in 2011 than in 2001 in the core area
whereas in the buffer area there is approximately 13 percent increase in population in 2011 than in
2001.
Table 4-44: Population and Households in the Study Area
Study Area
Core Area
Number of house holds
Population
Buffer Area
Total
41,751
298,672
340,423
Total
227,031
1,491,045
1,718,076
Male
117,592
776,515
894,107
Female
109,439
714,530
823,969
Source: Primary Census Abstract, 2011
The above table shows that the study area consists of a population of 1,718,076 of which males
are 894,107 and females are 823,969. The sex ratio of the total study area is approximately 922
in 2011. The sex ratio of the core and buffer area are 932 and 920 respectively in 2011.
4.11.3 Social Profile
Banaskantha District is situated on the banks of river Banas. It lies on the north-west side of the
Gujarat State. Marwad and Sirohi Districts of Rajasthan State in the north, Sabarkantha District in the
east surrounds the Banaskantha District.
Gandhinagar District includes the four talukas- Mansa, Kalol, Dahegam, and Gandhinagar. The famous
places here are Akshardham, Swaminarayan Complex, Deer Park, Sports Complex, Haranodyan garden
etc.
Ahmadabad is located on the banks of the river Sabarmati and earlier was also ‘Manchester of the
East’ for its home of developing textile industry.
Hinduism is the predominant religion of the Ahmadabad district and the various castes residing in the
study area are Patel, Thakor, Rabari, Naik, Raval, Prajapati, Vaghri, Darbar, Harijan, Parmar, Chunara
and Bhangi.
The statistics regarding the distribution of scheduled caste and scheduled tribe population in the study
area are given in Table 4-45.
Table 4-45: Schedule Caste and Schedule Tribe Population Distribution in the Study area
Study Area
Population
% SC
% ST
Total
Male
Female
Total
Male
Female
Core Area
11.9
12.0
11.7
0.92
0.91
0.93
Buffer area
11.6
11.7
11.6
1.47
1.50
1.43
Source: Primary Census Abstract 2011
As per the Primary Census Abstract 2011, the SC population in the core and buffer study area is
26,923 and 173,292 respectively and ST population in core and buffer study area is 2,094 and 21,895
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
150
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
respectively. The sex ratio of SC in the core and buffer area are 913 and 910 respectively. The sex
ratio of ST in the core and buffer area are 947 and 878 respectively. The population of the Scheduled
Caste is comparatively much higher than the Scheduled Tribe in the whole of the study area.
4.11.4 Literacy and Education in the Study Area
The detail of the literacy and education in the study area is given in Table 4-46.
Table 4-46: Detail of Literacy
% Literacy
Study area
Total
Male
Female
Core Area
53.6
64.7
41.7
Buffer Area
67.3
75.1
58.9
Total
65.5
73.7
56.6
Source: Primary Census Abstract 2011
The literacy rate in the core and buffer study area is 53.6 and 67.3 percent respectively. The literacy
rate of the males is relatively higher than the females in whole of the study area. In the core area the
literacy level is lower in comparison to the buffer area.
Table 4-47: Number of Villages having Educational Facilities in the Study Area
Study Area
Primary School
Secondary School
Senior Secondary School
College
Core Area
149
16
4
1
Buffer Area
527
91
29
3
Total
676
107
33
4
Source: Primary Census Abstract 2001
The study area has adequate primary schools present in the whole of the study area whereas middle
schools are totally absent in the study area. A total of four colleges are present in the study area, one
in core area and three other in the buffer areas.
The facilities however in the schools needs upgradation and maintenance in terms of study
equipments, potable water facility, building and connecting road to the schools.
4.11.5 Health Facilities in the Study Area
The statistics regarding to the health facilities within the study area are give in the Table below
Table 4-48: Number of Villages having Health Facilities in the study Area
Distance
from site
Allopathic
Hospital
Maternity &
Child
Welfare
Centre
Primary
Health
Centre
Primary
Health
Sub-centre
Family
Welfare
Centre
Registered
Private Medical
Practitioners
Core
5
5
3
14
12
20
Buffer
19
33
22
127
79
124
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
151
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
Total
24
38
25
DESCRIPTION OF THE ENVIRONMENT
141
91
144
Source: Primary Census Abstract, 2001
The above statistical data the shows the availability of health facilities in the study area according to
Primary Census Abstract, 2001. There are few primary health centers but many primary health subcentres, maternity & child welfare center and allopathic hospital present in the study area. Private
Doctors commonly pay visits to villages as and when required by the people. In some of the study
area villages there is no PHC so to avail this facility the villagers go to the nearest village having the
PHC.
Fever, malaria and water borne diseases are the common diseases prevalent in the study area and on
the whole the morbidity rate is quite low. Anganwadi workers continuously work for the promotion and
betterment of health of children and women.There is lack of sanitation facilities in the study area
which creates problem to the local people.
4.11.6 Rural Water Supply in the Study Area
The statistics regarding the drinking water facilities within the study area are given in Table 4-49.
Table 4-49: Number of Villages having Drinking Water Facilities in the Study Area
Study Area
Tap
Well
Tank
Tubewell
Handpump
River
Canal
Core Area
64
46
48
48
0
0
2
Buffer Area
291
118
113
217
22
5
3
Total
355
164
161
265
22
5
5
Source: Primary Census Abstract, 2001
There was sufficient drinking water facilities available in the study area in 2001. The facility of tap
connection to individual houses and tube well facility is sufficiently present in the study area villages.
4.11.7 Social Welfare
Women and child development programs are efficiently carried out by the Anganwadi workers of the
study area.
4.11.8 Economic Profile
Agriculture in the Study Area
The major crops of the study area are wheat, cotton, bajra, jowar, mustard, raidu, castor seeds and
pulses.
Agriculture is mostly carried out by the water from borewells and Narmada Canal. Modern equipments
and tractors are used to carry out the agricultural work in the study area.
Animal Husbandry in the Study Area
Livestock rearing is common among the people of this region. Most of the animals reared by them are
cows, buffaloes, goats, donkeys and camels.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
152
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
DESCRIPTION OF THE ENVIRONMENT
Photographs 4-7: Photographs of Animal Husbandry in the Study Area
Animal Husbandry in the study area
Private veterinary doctors visits on the basis of the requirement of the local people. Regular medical
check-up of animals is carried out by the private doctors.
Industries in the Study Area
In Banaskantha district the major medium and large scale industries are engaged in the production of
granite tiles and marble blocks. The district has seven Small Scale Industries (SSI) clusters focused on
textile, diamond processing and ceramics industry. The district is traditionally known for its food
processing industry, especially for vegetable oils and vanaspati. It is the third largest producer of oil
seeds in the State after Junagadh and Jamnagar.
Electronics & Textiles have been the main sectors of investment and employment in Gandhinagar
district since late 1980s. In Gandhinagar district services in the public sector, Electrical & Electronics,
Textiles, Food Processing, IT/ITeS, Ceramics and Office Stationery are some of the major vocational
and industrial activities in Gandhinagar.
In Ahmedabad district there are around 422 medium and large scale industries. Ahmedabad was
known as the Manchester of the East for being home of textile manufacturing.
4.11.9
Livehood Status
The statistics regarding to the distribution of the workers within the study area are given in Table
4-50.
Table 4-50: Occupational pattern Within the Study Area
Study Area
Cultivators
Agricultural
Labourers
Household
Workers
Marginal
Workers
Others
Core Area
38.8
23.2
0.7
20.3
17.0
Buffer Area
22.5
20.4
1.3
15.6
40.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
153
OIL AND NATURAL GAS CORPORATION
LIMITED
Total
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
24.9
20.8
1.2
DESCRIPTION OF THE ENVIRONMENT
16.3
36.8
Source: Primary Census Abstract, 2001
According to the Census Data 2011, there are 24.9% cultivators, 20.8% agricultural labourers, 1.2%
household workers and 36.8% marginal workers in the study area. 16.3% of the people fall in other
workers category. Most of the people of the study area are found to be employed in industries present
in the surrounding areas. The core area has 38.8% of the cultivators followed by the daily wage
agricultural labourers that is 23.2%. So it can be inferred from the above table that in the core area
maximum percent of population are cultivators where as in the buffer area the maximum percent of
population belongs to the others worker category.
4.11.10
Infrastructure
The statistics regarding to the prevalence of basic infrastructure within the study area are given in
Table 4-51.
Table 4-51: Number of villages having Basic Infrastructure within the Study Area
Study Area
Bus Services
Railway Services
Core Area
84
1
Buffer Area
315
27
Total
399
28
Source: Primary Census Abstract, 2001
The study area is well connected with roads and railway facilities. Banaskantha, Gandhinagar and
Ahmedabad are well connected to the nearby states through road and railway routes.
Availability of Power Supply
The Government of Gujarat supplies power to all the households in the study area through the
Jyotigram Scheme.
Means of Communication
The statistics regarding to the means of communication within the study area are given in Table
4-52.
Table 4-52: Number of Villages having Communication Facilities within the Study Area
Study Area
Post Office
Telephonic Connections
Core Area
52
624
Buffer Area
222
6536
Total
274
7160
Source: Primary Census Abstract, 2001
The changing trends in technology have massively affected the people in the study area. The most
important means of communication is mobile phones which is possessed by most of the individuals in
the locality. It has become an obsession among the youth and a necessity for the working class. The
post office facility and telephone connections are present sufficiently in the study area. The actual
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
154
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DESCRIPTION OF THE ENVIRONMENT
figure may differ however as the Primary Census Abstract of 2001 has been used where as its 2015
now.
Availability of Banking Facility in the Study Area
There are branches of State Bank of India, other public as well as private sector banks and
Cooperative Banks in many villages of the study area. The villages that do not have bank, avails bank
facility from the village or nearest city.
4.11.11
Cultural Profile
Archeological or Historical Sites/ Places of Religious Importance in the Study Area
Banaskantha district has presence of pilgrimages like Ambaji and Kumbharia.
Gandhinagar district has Akshardham Swaminarayan Temple which is built in pink stone turns
out to be city’s main tourist attractions.
Adalaj Step Well was built in 1499 by Queen Ruda, the wife of Vaghela Chief Vikramsinh, as a
resting place for travellers. It is five storied with elaborately carved geometric, floral and animal
designs.
Ahmedabad district has Calico Museum that is one of the best textile museum in the world. It
comprises of well labeled collection of textile, designs, articrafts and technology.
The district has presence of a number of temples like Swami Narayan Temple, Iscon Temple etc.
4.11.12
Lifestyle of the Study Area
People in the study area are mainly engaged in cultivation and animal husbandry. The major industry
of this town is cattle feed and dairy farm. There is presence of Milk Co-operatives in almost all the
villages of the study area that makes clear that animal husbandry is an important means of livelihood
of the villagers in the study area. The people have their own set of customs and rituals. The main
language spoken in this area is Gujarati. The cuisine in this area is comparatively spicy and includes
preparations of Rotli (Chapatti), Shaak (vegetable preparation), Dal (Lentils) and Rice. The people also
consume Chhaas (buttermilk) along with their food. Kadhi-Khichdi is much savored variety among the
people.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
155
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
5
ANTICIPATED ENVIRONMENTAL IMPACTS AND
MITIGATION MEASURES
5.1
Introduction
In this chapter, we:




5.2
5.2.1
Identify project activities that could beneficially or adversely impact the environment
Predict and assess the environmental impacts of the such activities
Examine each environmental aspect-impact relationship in detail and identify its degree of
significance
Identify possible mitigation measures for these project activities and select the most
appropriate mitigation measure, based on the reduction in significance achieved and
practicality in implementation
Impact Assessment Methodology
Key Definitions
Environmental Aspects
These are elements of an organization’s activities or products or services that can interact with the
environment. Environmental aspects could include activities that occur during normal, abnormal and
emergency operations.
Environmental aspects selected for further study should large enough for meaningful examination and
small enough to be easily understood.
Environmental Impacts
Environmental impacts are defined as any change to the environment, whether adverse or beneficial,
wholly or partially resulting from an organization’s environmental aspects.
Environmental Indices
The environment includes surroundings in which an organization operates such as air, water, land,
natural resources, flora, fauna, humans and their interrelation.
The environmental indices (or parts of the receiving environment on which impacts are being
assessed) include: Land use/land cover, air quality, noise quality, surface water environment, ground
water environment, soil, ecology and bio diversity, socio economics, occupational health, community
health and safety
After the identification of impacting activities, impacts require to be assessed based on subjective /
objective criteria to assess the impacting activities. This is done in the following steps.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
156
OIL AND NATURAL GAS CORPORATION
LIMITED
5.2.2
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Identification of Impacts
This entails employing a simple checklist method requiring:
1.
2.
3.
4.
5.2.3
Listing of environmental aspects (i.e. activities or parts thereof that can cause environmental
impacts)
Identifying applicable components of the environment on which the environmental aspects
can cause an environmental impact
Making notes of the reason / possible inter-relationships that lead to environmental impact
creation
Listing the environmental components likely to receive impacts, along with the key impacting
activities on each component
Component Wise Environment Risk Assessment and Mitigation
A component wise approach to environmental risk assessment and mitigation is now applied. For each
environmental component this is carried through a series of steps as follows.
Step 1: Review and Assessment of the Specific Aspects Generating Environmental Risk
Several scientific techniques and methodologies are also used to predict impacts on the environment.
Mathematical models are useful tools (where applicable) to quantitatively describe the cause and
effect relationships between sources of pollution and different components of environment. In cases
where it is not possible to identify and validate a model for a particular situation, predictions have
been arrived at based on logical reasoning / consultation / extrapolation or overlay methods. In any
case, for each component of the environment, the methods used to arrive at the likely impacts require
to be described.
Step 2: Quantifying the Environmental Risk, Identifying Aspects Causing Unacceptable
Levels of Risk and Prioritizing Aspects Requiring Mitigation Measures
Once a general understanding of the impacts has been studied and understood, efforts are made to
compare different impacts so as to prioritize mitigation measures, focusing on those impacting
activities (i.e. aspects) that require urgent mitigation. For ease of comparision across different
activities, a summary environmental risk score is calculated. Two key elements are taken into
consideration based on standard environmental risk assessment methodologies:


Severity / consequence: the resultant effect of an activity and its interaction with the physical,
biological and/or socio-economic environments
Probability: the likelihood that an impact may occur due to the project activity/aspect
A combination of severity / consequence with probability gives a reasonable measure of environmental
risk, which aids in decision making. It must always be kept in mind that any scoring methodology
howsoever well defined is subjective and different persons can arrive at different impact risk scores
based on their understanding / opinion. Therefore end results should be evaluated against past
experience as well as professional judgment as well as project and activity specific conditions to
ensure adequacy and equity. Kadam has made an effort to ensure that the scoring does not change
significantly assuming that different evaluators are equally well informed on the project as well as
knowledgeable on the concerned issues. The steps in identifying environmental risk follow.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
157
OIL AND NATURAL GAS CORPORATION
LIMITED
1.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Scoring the Impact Severity / Consequence
The consequences on various environmental receptors have been ranked into 5 levels ranging from
insignificant to catastrophic consequence and are given in Table 5-1.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
158
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Table 5-1: Impact Scoring System – Consequence Assessment
Impact and Score7
S.
No.
C1
Environmental
Component
Impacted
C2
Insignificant
Consequence
(+/-) 1 point
C3
Minor Consequence
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
C4
C5
Very short term
Short term
(upto 1 year)
(>1 - 3 years)
Medium term (>3 - 5 years)
Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
C6
C7
Long term
(> 5-10 years)
Very long term (>10 years)
Extent
1
Landuse /
Landcover
Very Limited (Within core
zone)
Medium Range
Long Range
(<1 km around core zone)
>1 – 3.0 km around core
zone)
(>3 – 7 kms around core
zone)
Extensive
(>7.0 kms around core
zone)
Largely Reversible
Equally distributed between
reversible and irreversible
Largely irreversible
Irreversible
Moderate environmental
impact due to controlled /
uncontrolled release of air
emissions, odor / dust or
greenhouse gases leading
to visual impacts, at
significant nuisance levels
Significant environmental
impact due to release of air
emissions, odor / dust or
greenhouse gases leading
to exceedance of limits
specified in EP Rules’
Unacceptable
environmental impact due
to release of air emissions,
odor / dust leading to
possibility of chronic / acute
health issues, injuries or
fatalities
Limited
Intensity
Reversible
2
Air Quality
Ambient Noise 3
give the mean
score from the
Temporary nuisance due to
controlled / uncontrolled
release of air emissions,
odor / dust or greenhouse
gases
Minor environmental impact
due to controlled /
uncontrolled release of air
emissions, odor / dust or
greenhouse gases with no
lasting detrimental effects
Background Noise Levels, with respect to Applicable Limit8 as per The Noise Pollution (Regulation and Control) Rules, 2000, as
Measured at Boundary of Relevant Noise Generating Unit
<10% or more
Between <10 to <5%
Between <5% or the limit
Upto 5% above the limit
>5% above the limit
1
7
8
In case none of the impacts are applicable, then Not Applicable (NA) is written in the appropriate cell.
For leq (day) or leq (night), whichever is higher.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
159
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Impact and Score7
S.
No.
C1
Environmental
Component
Impacted
C2
three
categories,
rounded to the
nearest decimal
Insignificant
Consequence
(+/-) 1 point
C3
Minor Consequence
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
C4
C5
Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
C6
C7
Incremental Noise Levels, as Predicted at Boundary of Relevant Noise Generating Unit
1 dB(A) or less
1 dB(A) – 2 dB(A)
2 dB(A) – 3 dB(A)
3 dB(A) – 4 dB(A)
4 dB(A) or more
Incremental Noise Levels, as Predicted at Boundary of Nearest Human Settlement / Sensitive Receptor from Boundary of Relevant
Noise Generating Unit
0.5 dB(A) or less
0.5 dB(A) – 1 dB(A)
1 dB(A) – 1.5 dB(A)
1.5 dB(A) – 2 dB(A)
2 dB(A) or more
250 – 500
501 and more
5 – 10 years
10 years or more
Other discharge within
limits specified by the EP
Rules
Other discharge, outside
limits specified by the EP
Rules
Water Consumption (KL/D)
Surface Water -
4
give the mean
score from the
three
categories,
rounded to the
nearest decimal
< 50
5
101 - 250
Water Consumption, Duration
< 1 year
1 – 3 years
3 – 5 years
Wastewater Discharge Quality
No wastewater generation
Zero Discharge9
Discharge to an authorized,
functional CETP
Location of Drawl, as per CGWA / CGWB Regulations
Ground Water -
give the mean
score from the
three
categories,
rounded to the
nearest decimal
51 – 100
Safe
Semi-critical
Critical
Over-exploited
Notified
250 – 500
501 and more
5 – 10 years
10 years or more
Water Drawl (KL/D)
< 50
51 – 100
101 - 250
Water Drawl, Duration
< 1 year
1 – 3 years
3 – 5 years
1
9
Meaning that any wastewater generated is recycled and any non-recycled water is disposed without discharge, through an appropriate means such as thermal destruction.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
160
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Impact and Score7
S.
No.
C1
Environmental
Component
Impacted
C2
Insignificant
Consequence
Minor Consequence
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
C4
C5
(+/-) 1 point
C3
Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
C6
C7
Accidental spillage/leakage for both storage/transport routes10
Negligible leakages of
chemicals/oils that only
require periodic
maintenance
Minor but frequent leakages
of Chemicals/oil that require
provision safety measures
and proper maintenance
Moderate leakages of
Chemicals/oil that may
contaminate groundwater if
proper safety measures not
provided
Major leakages of
Chemicals/oil that
contaminate groundwater if
safety measures not
provided
Heavy leakage that
adversely contaminate
groundwater and must
require urgent remediation
actions
1
10
Consideration to be given to pollutant, pathway and receptors.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
161
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Impact and Score7
S.
No.
C1
6
7
Environmental
Component
Impacted
C2
Soil Quality
Flora, Fauna,
Habitat/Eco
system
Insignificant
Consequence
(+/-) 1 point
C3
Loss of upto 20% topsoil,
or minor contamination of
soil that can be easily
restored close to original
condition for volume <10
m3
Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
Minor Consequence
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
C4
C5
C6
C7
Loss of upto 60% topsoil,
or actual or possible
contamination of soil
volume <25 m3 but above
Dutch Intervention Values
Loss of upto 80% topsoil,
or actual or possible
contamination of soil
volume >25 m3 and above
Dutch Intervention Values,
but not deemed to require
urgent remediation
Loss of upto 100% topsoil,
or actual or possible
contamination of soil
volume >25 m3 and above
Dutch Intervention
Values11, and deemed to
require urgent remediation
Loss of upto 40% topsoil,
or actual or possible
contamination of soil
volume <25 m3 but below
Dutch Intervention Values
 Site specific loss (removal)  Site specific loss (removal)  Site specific loss (removal)  Site specific impact on  Impact on threatened
species listed in as a
threatened
species
of some common well
of some saplings of trees.
of common floral species
endemic / Schedule-I as
(specialist species) but
grown
tree
/
trees
(but not any tree or  Minor temporary impacts
per IWPA 1972, BSI, Red
impacted species is widely
species.
trees).
on ecosystem functioning
Data Book, ZSI, BSI or
distributed outside the
 Vegetation
composition
or habitat ecology of  Site specific loss of
literature published by any
project site. Short term
nesting / breeding habitat
common
/
generalist
does not form a habitat
State
Govt.
Institute,
impacts
may
lead
to
loss
of
common
/
wild
species.
character for any species
University
and
Collage
etc.
of
abundance
or
extent,
generalist species of floraof
conservation  Minor short term / long
but
unlikely
to
cause
local
 Loss of habitat of above
fauna but will not result in
significance.
term
impacts
on
population extinction.
said flora-fauna.
permanent
loss
of
habitat
 No short term or long
surrounding / immediate /

Site
specific
habitat
loss
of
/
permanent
displacement
 Impact
on
genetic
adjacent habitats and are
term impacts are likely to
fauna listed in IUCN,
of fauna.
diversity Impact on NP /PF
resilient to changes in
adversely
affect
the
WCMC,
Birdlife
/WLS /ESZ /IBA / tiger
habitat
structure
or  Short term or long term
surrounding
habitat
/
International,
or
any
other
reserve / elephant corridor
impacts are likely to
condition.
ecosystem.
international literature / corridor.
adversely
affect
the
 Site specific disturbance  Impact on surrounding
1
11
Source: Ministry of Housing Spatial Planning and the Environment, Netherlands; Soil Remediation Circular 2009, Annex A.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
162
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Impact and Score7
S.
No.
C1
Environmental
Component
Impacted
C2
Insignificant
Consequence
(+/-) 1 point
C3
 No negative impacts on
surrounding
ecosystem
functioning or habitat
ecology.
8.1
give the mean
score from the
categories,
rounded to the
nearest decimal
Socio-economic
Environment:
Economic
Aspects - give
8.2
the mean score
from the
categories,
rounded to the
nearest decimal
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
C4
to common / generalist
faunal
species
(e.g.
movement
pattern,
displacement etc.).
Socio-economic
Environment:
Social Aspects -
Minor Consequence
C5
agro-ecosystem
/
agriculture
when
environmental
data
/
parameters are within
permissible limits.

Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
C6
C7
secondary information.
surrounding
habitat
 Impact on ecosystem like
character/
habitat  Impacts on habitats /
river, forest, wetland (e.g.
ecology/ functioning of
RAMSAR site etc.) etc.
ecosystems
of
ecosystem
international importance.
 Any wildlife accident /
Impact on surrounding
mortality / accident event
agro-ecosystem
/
agriculture when physical
parameters
beyond
permissible limits.
Possible Temporary or Permanent Migration, Persons as a % of Population of Study Area
<0.5%
<1%
<1.5%
<2%
2.5%
Possible Change in Ethnicity, vis-à-vis Major Existing Ethnicities Present in Study Area
Not Likely
Possible
Limited
Significant
Severe
Gender Imbalance, as a Proportion to Existing Sex-Ratio
Not Likely
Possible
Limited
Significant
Severe
Possibility of Return to Original Status in Terms of Any or All of the Above Changes
<1 year
<2 years
<50
Up to 75
<3 years
<5 years
Permanent Change
Up to 250
Up to 500 or more
500
1000 or more
<100
>100
<50
>50
No of Jobs Gained or Lost
Up to 100
Persons Having Loss or Gain in Income
<50
100
250
Land Losers
<10
<20
<50
Losers of Homesteads
<5
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
<10
<25
163
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Impact and Score7
S.
No.
C1
8.3
Environmental
Component
Impacted
C2
Socio-economic
Aspects:
Cultural
9.1
Occupational /
Community
Health and
Safety:
Community
Health and
Safety
9.2
Occupational /
Community
Health and
Safety:
Occupational
Health and
Safety
Insignificant
Consequence
(+/-) 1 point
Minor Consequence
Moderate Consequence
(+/-) 2 points
(+/-) 3 points
Major
Consequence
Catastrophic
Consequence
(+/-) 4 points
(+/-) 5 points
C3
C4
C5
C6
C7
Minor repairable damage to
commonplace structures
Minor repairable damage to
structures / items of
cultural significance, or
minor infringements of
cultural values
Moderate damage to
structures/ items of cultural
significance, or significant,
infringement of cultural
values/ sacred location
Major damage to structures
/ items of cultural
significance, or major
infringement of cultural
values / sacred locations
Irreparable damage to
highly valued structures /
items / locations of cultural
significance or sacred value
Insignificant impact on
surrounding communities
Minor complaints or
exposure to community.
Maximum occurrence
limited to two times per
year
Ongoing complaints from
community. Significant
emission or discharge that
impacts on surrounding
population
Major ongoing long term
health effects likely to
surrounding communities
and workers
Extreme health riskpotential for death in
community
Near miss incident or trivial
injuries, this may require
self administered first aid.
Injured personnel can
continue to perform normal
duties
Injuries requiring onsite
treatment by medical
practitioner. Personnel
unable to continue to
perform duties
Serious injuries requiring off
site treatment by medical
practitioner or immediate
evacuation to hospital.
Potential long term or
permanent disabling effect
Single Fatality
Multiple Fatality
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
164
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
2. Quantifying the Probability of Occurrence of the Impact
After identifying the consequence severity as shown in Table 5-1, the probability of occurrence also
needs to be estimated to arrive at a complete picture of environmental impact risk. Table 5-2
provides probability / likelihood ratings on a scale of 1-5. These ratings are used for estimating the
likelihood of each occurrence.
Table 5-2: Probability of Occurrence
Description
Environment/Health and Safety
Probability
Frequent
Continues or will happen every time during the exploratory drilling program
5
Often
Occur several times during the exploratory drilling program
4
Likely
Might occur at least once during the exploratory drilling
3
Possible
Might occur during the exploratory drilling
2
Rare
Very rarely encountered in during the exploratory drilling
1
3. Quantifying Environmental Impact Risk
The level of environmental impact risk is calculated by multiplying the consequence score and the
probability of occurrence together. Thus
Significance of Impact = Consequence Score × Probability of Occurrence
The final score is in relative point score, rather than actual impact. The impact estimation is carried
out assuming a well managed exploratory program with the use of standard safety measures. Table
5-3 below assigns significance criteria, based on the scale of 1-25, used for prioritizing mitigation
measures for reducing the environmental impact risks and thereafter, formulating and implementing
Environmental Management Plans (EMPs).
To do this, environmental impact risk levels are first scored and identified as mentioned earlier and
then evaluated on the evaluation scale that follows in Table 5-3.
Table 5-3: Environmental Impact Significance Criteria
Consequence
Probability
Insignificant
(1)
Minor
Moderate
Major
(2)
(3)
(4)
Catastrophic
(5)
Rare (1)
1
2
3
4
5
Possible (2)
2
4
6
8
10
Likely (3)
3
6
9
12
15
Often (4)
4
8
12
16
20
Certain (5)
5
10
15
20
25
4. Identifying Activities Causing Unacceptable Levels of Environmental Risk
Environmental risks are now clubbed into four levels from extreme risk to low risk activities. Extreme
risk activities are unacceptable and therefore need to be either stopped or modified such that they are
brought to a lower level of environmental risk.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
165
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
High and moderate risk activities, although acceptable, require being evaluated and mitigated in a
manner that their consequences / probabilities are lowered, with more focus on high risk activities visà-vis moderate risk activities. Low risk activities do not require further mitigation. This is summarized
in Table 5-4.
Table 5-4: Environmental Risk Categorization
Scoring Negative Impacts (-)
Scoring Positive Impacts (+)
Colour Code and
Score Range
Type of Risk
Inference
Colour Code
and Score
Range
Inference
25
Extremely
Severe
Activity should not proceed
in current form
25
Activity has
Extensive Positive
Benefits
15-20
Very Severe
Activity should be modified
to include remedial
planning and actions and
be subject to detailed
ecological assessment
15-20
Activity has Major
Benefits
8-12
Moderately
Severe
Activity can operate
subject to management
and / or modification
8-12
Activity has
Moderate Benefits
4-6
Less Severe
No action required unless
escalation of risk is
possible
4-6
Activity has Minor
Benefits
1-3
Minor /
Negligible
Negligible Risk of activity
1-3
Activity has mildly
positive impacts
Mitigation Measures
Mitigation measures require being formulated and implemented for all high risk and moderate risk
activities. A programme to implement all mitigation measures is then prepared and presented as an
Environmental Management Programme, presented in Chapter 9.
Impact Assessment for the Exploratory Drilling Programme of ONGC, based on the methodology
described here, is given in the next section.
5.3
Identification of Impacting Activities for the Proposed Project
As discussed earlier, environmental impacts have been identified based on an assessment of
environmental aspects associated with the project. The symbol ‘●’ indicates an adverse impact and ‘o’ indicates a beneficial impact.
Identified environmental impacts have been listed in Table 5-5.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
166
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Table 5-5: Aspect – Impact Identification
Ecology & Bio-diversity
(EB)
Socio-Economic (SE)
Occupational Health,
Community Health &
Safety (OH / CH&S)
Site Selection
Soil (S)
1
Ground Water (GW)
C2
Surface Water (SW)
C1
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
C3
C4
C5
C6
C7
C8
C9
C10
C11
Remarks
C12
LU (-): Potential change in landuse / land cover
typically from agricultural land;
1.1
Land lease or purchase
SE (+): Compensation to land owner against
lease – voluntary land lease at market rate;
annual lease payments by cheque;
●o
●
SE (-): Reduction in agricultural productivity
(Approximately 0.04%) due to conversion of
agricultural land to land for oil and gas production
and access roads
2
Preparation of Site
LC (-): Change in land cover for a short duration
(since landuse change will be short term/ being
exploratory operations)
2.1
Clearance of vegetation at site and
preparation of approach roads
●
●
●
●
●
o
●
AQ (-): Dust generation during clearing
operations
NV (-): Noise and vibration from vehicles and
road laying equipment
S (-): Soil erosion due to wind or storm water run
off
EB (-): possible loss of green cover (very
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
167
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Occupational Health,
Community Health &
Safety (OH / CH&S)
Socio-Economic (SE)
Ecology & Bio-diversity
(EB)
Soil (S)
Ground Water (GW)
Surface Water (SW)
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
Remarks
marginal if at all since most of the land lost will
be agricultural)
SE(+): improved local roads; short time
employment for approach road construction
OH (-): risk of occupational injuries
LC(-): Change in topography of site due to
excavation;
AQ(-): Dust generation due for excavation
operations;
2.3
Excavation and paving of site
●
●
●
●
o
●
NV(-): Noise generation due to machinery used
(JCB, Tractors and Trucks) for excavation
operation
S(-): Loss of top soil;
SE(+): Temporary job creation for excavation and
site preparation work;
OH(-): Occupational risk involved in excavation
work
AQ(-): air emissions due to vehicle movement;
2.2
Vehicle movement for transportation of
rig, materials and equipment
●
●
o ●
●
NV(-): Noise Generation due vehicle movement
and unloading of materials such as drill casing
pipes, mud circulation system, DG Sets, Rig
components
SE(+): hiring of vehicles for movment of
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
168
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Occupational Health,
Community Health &
Safety (OH / CH&S)
Socio-Economic (SE)
Ecology & Bio-diversity
(EB)
Soil (S)
Ground Water (GW)
Surface Water (SW)
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
Remarks
materials
SE (-): potential damage to village roads;
OH/ CH&S(-): Risk involved in transportation
activity such as accidents, damage to properties
etc
3
3.1
Rigging up and Drilling
Setting up the rig floor and derrick,
handrails, guardrails, stairs, walkways,
ladders, flare stack, drilling fluid
circulating system & other equipment
and machinery
NV(-): Noise generation during set up of rig and
machinery;
●
●
●
S(-): Soil contamination due to spillage if any
during rigging up operation; and compaction of
soil due to setting up of rig and circulation system
OH(-): Risk of occupational injury such as fall
from height, stuck by object, caught in under or
between, etc. during rigging up operation
S(-): Soil contamination if soak pit is not designed
properly;
3.2
Workforce accommodation & sanitation
●
●o
●
SE(+): Marginal increase in indirect income of
locals due to technical crew at site
SE (-): Conflict of Crew members with near by
villagers
OH(-): Risk of dieses due to unhygienic condition
of accommodation and sanitation facilities
3.3
Chemical and fuel storage
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
●
●
●
●
SW (-): Possibility of surface water contamination
169
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Occupational Health,
Community Health &
Safety (OH / CH&S)
Socio-Economic (SE)
Ecology & Bio-diversity
(EB)
Soil (S)
Ground Water (GW)
Surface Water (SW)
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
Remarks
due to spillage of chemicals and fuel
GW(-): Possibility of ground water contamination
due to spillage of chemicals and fuel;
S(-): Possibility of soil contamination due to
spillage if any;
OH(-): Occupational risk due to handling of
material required for drilling mud preparation
3.4
3.5
Use of raw water for drilling
GW(-): Use of resources, ONGC will use ground
water extracted from its bore well located nearest
to the drilling locations
●
Preparation of drilling fluid
●
●
S(-): possibility of soil contamination due to
spillage of mud if any
OH (-): Occupational risk during preparation of
drilling fluid
AQ(-): air emission due to operation of DG sets;
NV (-): Noise generation due to operation of rig,
DG Set and mud circulation pump;
3.6
Drilling process
●
●
●
●
S(-): Possible contamination of soil due to
improper discharge of drill cutting, spillage of
diesel & oil and waste water from drilling process
EB(-): disturbance to fauna residing near to site
3.7
Installation of casing
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
●
S(-): possibility of soil contamination due to
improper installation of casing
170
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
3.9
Storage, handling and disposal of
solid/hazardous waste
Occupational Health,
Community Health &
Safety (OH / CH&S)
●
Socio-Economic (SE)
Soil (S)
●
Ecology & Bio-diversity
(EB)
Ground Water (GW)
Circulating and cementing
Surface Water (SW)
3.8
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
Remarks
GW/S(-): possibility of ground water and soil
contamination due to leakage of cement and mud
during circulating and cementing
●
●
S(-): Possibility of soil contamination due to
improper disposal and/ or transportation of solid
and Hazardous waste;
OH/OH&S(-): Risk to workers and community in
surrounding area due to spillage if not stored and
transported properly
GW/S(-): Possibility of ground water and soil
contamination due to improper disposal of waste
water;
3.10
Storage, handling and disposal of waste
water
●
●
●
●
●
SE(-):Damage to crop in adjacent field due to
possiblity of leakage or overflow of waste water
from HDPE lined pit
OH/OH&S(-): Risk to community health due to
spillage in surrounding area if not stored properly
AQ(-): air emission during blow out;
3.11
Blow out
●
●
●
●
●
S(-): Soil contamination due to deposition of
hydrocarbon emitted during blow out;
NV(-): Noise due to blow out;
EB(-): impact on ecology and bio diversity of
surrounding area due to emission of hydrocarbon
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
171
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Occupational Health,
Community Health &
Safety (OH / CH&S)
Socio-Economic (SE)
Ecology & Bio-diversity
(EB)
Soil (S)
Ground Water (GW)
Surface Water (SW)
Noise and Vibration (NV)
Project Activities / Aspects
Air Quality (AQ)
S.
No.
Landuse/ Landcover
(LU/LC)
Potential Environmental Impacts on Environment
Remarks
& heat generated during blow out;
OH/OH&S(-): Risk of fatal injury to worker and
staff working at site, risk to community health
due to emission of hydrocarbon in surrounding
area
4
Decommissioning
AQ(-): Dust generation during dismantling work;
NV(-): noise generation during dismantling work
4.1
Dismantling of rig & associated
machineries
●
●
●
●
S(-): possibility of soil contamination during
decommissioning work;
OH(-): Occupational risk during dismantling work
of rig and associated machinery
LC(-): Possibility of change in topography of the
site;
4.2
Site restoration
● o
●
LC(+): If the site is restored properly it can have
a positive impact as the productivity will be
regained;
SE(-): Economical impact due to loss of income
from land if site is not restored properly and also
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
172
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Based on this preliminary identification, environmental indices that are likely to be impacted due to the
project are:









Landuse / Land cover: Land lease/purchase, site preparation and site restoration
Air quality: Vehicle movement during site preparation and restoration, operation of DG set,
Testing and flaring operation and blow out
Noise: Vehicle movement during site preparation and restoration, operation of DG set, during
drilling process
Surface Water: Damage to the existing surface water body if any is present due to runoff
Ground water: use of raw of water for drilling, cementing activity, storage and handling of
waste water
Soil: clearance during site preparation, site restoration, chemical and fuel storage and storage
and handling of solid and hazardous waste
Ecology and Biodiversity: clearance of vegetation during site preparation and blow out
Socio – Economic: positive impact due to creation of jobs and increase in indirect income
while may have negative impact due to improper restoration
Occupational health, community Health and safety: Occupational risk during various activity
associated with drilling, risk to community due to blow out or spillage of waste water or
fuel/chemicals
These are discussed in further detail.
5.4
Air Environment
Impacts on the air environment are necessarily transient and temporary owing to the time bound
nature of exploratory drilling work.
A number of sources in onshore oil and gas drilling cause potential impacts on air quality, which
include:




Emissions from DG sets used as part of the drilling rig;
Flaring of gases primarily during the testing phase will contribute to additional air pollution;
Fugitive emissions during site preparation and closure phases;
Emissions from vehicular movement;
For the purpose of impact predictions on air environment, emission sources can be classified into point
and area sources. Whilst no area sources have been identified as part of the project, point sources
have been identified and these include diesel engines / generator sets at drill sites.
These are discussed.
5.4.1
Diesel Engines / Generators Sets
As already mentioned earlier, a diesel engine (two operational and one on standby) shall work 24
hours a day during the exploratory drilling period, for operating the drill rig, mud circulation as well as
illumination and Heating / Ventilation / Air-conditioning (HVAC) systems. Its capacity will be ~1250
kVA, consuming ~290 kg/hour of diesel conforming to specifications laid out in the Bharat Stage IV
norms, indicating a sulphur content of <50mg/kg. It will emit pollutants, principally NOx, SO2 and PM.
The exhaust of the DG set will be of sufficient height as per the Environment Protection Rules, 1986 as
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
173
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
amended till date, to allow dispersion of the pollutants DG sets will be properly maintained so that
emissions will be under statutory limits – currently the applicable Rule (Emission limits for new diesel
engines (more than 800 KW) for generator sets (Gensets) application, Schedule I of The Environment
(Protection) Rules, 1986 as amended to date) require DG sets having a capacity > 800 KW to emit
less than 710 ppmv for NOx and 75 mg/Nm3 for PM if the D.G set is having a capacity up to 75 MW.
Emissions from the diesel engine were analyzed for their impacts on the GLC for various distances
using the dispersion modeling guidelines given by the Central Pollution Control Board, New Delhi and
the AERMOD Model of the United States Environment.
Assumptions and the dispersion modeling results of AERMOD model are provided as Annexure 5. The
results indicate the following:
1.
2.
The maximum 24 hourly GLC’s are observed to be 0.065 µg/m3, 7.03µg/m3 and 0.065µg/m3
for SO2, NOx and particulate matter respectively. These GLC’s are expected to occur at a
distance of 200 m from the source towards the SW direction.
The concentration limit for SO2 and NOx in the ambient air, as specified by CPCB is 80 µg/m3.
Hence, the predicted impact level due to the operation of Diesel Engines and D.G sets is
within the prescribed limits of CPCB for the ambient air quality. Consequently ambient air
quality due to proposed activities is not expected to cause an effect on vegetation and human
settlements in the vicinity of the operational sites.
Operational & design considerations of the diesel engines with respect to parameters such as air-fuel
ratio, fuel quality and rate of combustion would contribute to reduction / increase in emission load to
the air environment. The level of maintenance of the engines as well as their make and age will also
influence the air emissions. Ensuring that operating conditions are managed as per standard operating
procedures is therefore, of importance.
5.4.2
Fugitive Emissions
Fugitive emissions due to the proposed project will be principally associated with emissions of dust
during the initial site preparation and closure phases. Fugitive emissions can cause the dust to settle
down at nearby residential properties and on agricultural lands. In addition, fugitive emissions in the
form of material dust are also expected during drilling operations like loading, unloading, handling of
drilling fluid, chemical additives, cement and cement additives etc. Fugitive dust may also impact
agricultural crops in and around the drill sites within the acquired block.
Volatile chemicals and fuel are stored at the site. Fugitive emissions may emanate from these, if not
capped properly or not handled with due care. However, such emissions will not disperse widely and
can only affect workers health at site.
5.4.3
Flaring
Flaring of gases primarily during the well testing phase will contribute to additional air pollution in
terms of release of unburnt hydrocarbons. Location of the flaring stack will have the potential to affect
the air quality at the nearby receptors. Flaring will involve high temperature oxidation process to burn
combustible gases that may be generated from the proposed well. However, In accordance with the
Oil Mines Regulation Rules, 1984 (OMR 1984; Chapter 9, Section 96 – Protection against Pollution of
Environment), a flare stack of minimum 9 m height or higher as required by the Regional Inspector
(Inspector of mines in charge of the region or local area) will be provided at a distance of 30 m from
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
174
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
well, given the fact that, flaring is a temporary activity which will not last for more than a few days,
the impacts on air quality will not be significant.
5.4.4
Emission from Vehicle /Machinery
This kind of emissions will principally arise from the vehicles used for the transport of construction
materials and equipment, for the workers and for the transport of drilling rig to the site. Most vehicles
used at site will be PUC certified hence the effect will be reduced to some extent. There will be a
chance that, the workers on the site would get exposed to this type of emission from the vehicles.
However their effect will be localized and transient in nature and will principally affect the localities
adjacent to the access road.
5.4.5
Blowouts
Blowouts, if occurring, can be a major source of air pollution, especially if ignited.OMR 1984 requires
wells to have blow-out preventers to reduce the risk of blowouts. These will be followed. Blowouts are
however, extremely rare phenomena – per available reliable statistics – likely to occur once in 2040 -
2272 onshore wells drilled12.
5.4.6
Mitigation Measures
Mitigation measures for air quality impacts are:




The flaring system will be properly managed at all times;
Water spraying will be done on the access roads to control re-entrained dust during dry
season (if required);
The engines and exhaust systems of all vehicles and equipment used will be maintained as
such, that exhaust emissions are low and do not breach statutory limits set for the concerned
vehicle/equipment type;
Ensuring the availability of valid Pollution Under Control Certificates (PUCC) for all vehicles
used on site.
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.4.1-5.4.4, the impact scores on air environment are likely to be as mentioned in Table
5-6.
1
12
International Association of Oil & Gas Producers, (OGP), 2010, Report No. 434-2, Blowout Frequencies, pp-12.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
175
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-6: Impact Scoring of Air Environment
Impact Scoring
Code
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
1
Clearance of vegetation at
site and preparation of
approach roads
2
1
2
Low risk, as
probability is given a
lower score due to the
fact that many of
proposed wells will be
drilled from existing
locations of ONGC
2
Excavation and paving of
site
2
3
6
Moderate risk
3
Vehicle movement for
transportation of rig,
materials and equipment
3
Low risk, as vehicles
used will be PUC
certified i.e
consequence is given
a lower score
5
Low risk,
Consequence is given
a lower score due to
the fact that D.G sets
will be properly
maintained and
results of the
dispersion modeling
shows the emissions
to be within limits
5
Low risk due to low
probability of
occurrence of blow
out,
6
Moderate risk,
Consequence is given
a score of 2 due to
emission arising out of
various activities
involving
transportation of rig,
equipments,
4
5
6
Drilling Process
Blow out
Dismantling of rig &
associated machineries
1
1
5
2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
3
5
1
3
176
OIL AND NATURAL GAS CORPORATION
LIMITED
5.5
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Noise Environment
The proposed drilling operations and related activities will lead to emission of noise that may have
significant impact on the surrounding communities in terms of increase in noise levels and associated
disturbances. The potential impacts on noise level may arise out of the following:
5.5.1
Noise from drilling rig
The drilling rig and associated machinery, including the DG set is likely to emit noise in the range of 90
to 100 db (A). Moreover, as drilling is a continuous activity, such noise will be emitted during both
daytime and night time leading to a significant impact on local communities if located near to the well
site. But as all the wells will be drilled at a safe distance of 500 m from nearest habitation this will
reduce its impact on local community.
The high noise levels within the site also have the potential to affect the workers on site. Continuous
exposure to high noise level in workplace environment may cause Noise Induced Hearing Loss (NIHL)
and other discomforts like headaches and increase in stress levels in workers.
5.5.2
Noise from Machinery/ Equipment
In addition to the drilling activity, site preparation / closure related activities will also involve the
operation of heavy equipment like pile drivers, loaders, and bulldozers etc. Such heavy equipments are
noted to emit noise emissions which will get dispersed in the nearby communities thus resulting in a
decrease in noise quality in the immediately adjacent settlement area. Some activities like piling may
also result in minor vibration impacts which are expected to subside to acceptable levels with distance.
5.5.3
Noise from vehicle / traffic
Vehicles used for procuring goods, material and manpower to the drilling site and the subsequent
transportation of rig/equipments and debris during decommissioning will use the site approach road
and village roads, which connect to state highway and village roads. This will result in increase in
traffic density in the site access road and introduction of vehicular traffic on the site approach road
during the site preparation stage as 50 -60 truck load will transfer rig and other equipments to the
site, and will cause increase in noise levels. But as this activity will be transient and for few days the
impact may be considered to be insignificant given the present environmental setting.
5.5.4
Assessment of noise levels using Sound Plan
Noise Modelling study was done using the Software tool called “Sound Plan” which predicts the Noise
Map generated due to the sources present at the project site, and predicts the Noise Levels at various
receiver points due to the sources present at the project site.
To analyze the Noise Map of the project site, first, the geometrically coordinated Google Earth images
of the Project site were imported into the software. Various Sources of noise were added with their
approximate Sound Pressure Levels, and the “Receiver points” were added at various locations where
Noise Monitoring was conducted.
“SoundPlan” generates the Noise Map with coloured pattern isoplates, which indicate whether or not
the SPL in that particular region is above the limits mentioned by CPCB or not. If the Limit for Sound
Pressure Level indicated by CPCB for that particular area is 75 dB during the day, and if the predicted
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
177
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
SPL is below that, the Noise Map will show Green colour for that area. But if the SPL is above the
“user set” allowable limit, the same will be shown in Red colour depending upon the Difference
between then Predicted SPL and the Allowable SPL, and the “Conflict” in SPL is mentioned in the table
if any conflict is predicted.
5.5.5
Consideration during the analysis
The following consideration were take during the analysis:
1.
2.
Noise modelling for all the wells is not required since majority of noise is going to be created
during the drilling operation i.e. drilling of Rig, DG sets, Compressor etc. Further, all the wells are
not going to be drilled simultaneously and only 3 or 4 drilling rigs would be operational at a time.
Thus, noise modelling has been performed at a distance of 50,100,150,200,250 and 500 m from
the drilling rig.
The sources considered at the project site for the analysis with their approximate Sound Pressure
Levels are considered slightly on the higher side for more critical analysis. The sources of noise
considered are as Table 5-7.
Table 5-7: Sources of noise with their sound pressure levels
S.
No.
Sources
1.
Operation of Rig
Levels dB(A)
Day
Night
105
105
Using above consideration the isopleths generated for day time and night time is given below
Figure 5-1: Iso pleths generated during day time for in Block CB-ONN-2010/1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
178
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Figure 5-2: Isopleths generated during night time in block CB-ONN-2010/1
Figure 5-3: Isopleths during day time in block CB-ONN-2010/6
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
179
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Figure 5-4: Isopleths During night time in Block CB-ONN-2010/6
Figure 5-5: Isopleths during day time in Block CB-ONN-2010/9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
180
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Figure 5-6: Isopleths during night time in Block CB-ONN-2010/9
5.5.6
Observations
The sound pressure levels were predicted at different sources as mentioned above. The observations
are:
1.
The project site is located in a designated industrial area, where the CPCB limits defined for Noise
Levels are 75 dB during the day and 70 dB during the night. However, sound pressure levels are
considered on higher side for more critical analysis.
2. Since the sources of noise are present within the project site, near boundary wall of the project
site being present, increase beyond 75 dB at the site was not observed.
3. From above, it can be observed at project site, noise is predicted in the range of 60 dB (A) - 70
dB(A) which is within the permissible limit for industrial area.
The predicted noise levels along with the conflict are as given in Table 5-8.
Table 5-8: Noise level at receptor locations for Single well location
Assumed Limit
dB(A)
Level dB(A)
Conflict dB(A)
S. No.
Receiver Name
Day
Night
Day
Night
Day
Night
1.
50 m
55
45
59.8
59.8
4.8
14.18
2.
100 m
55
45
49.5
49.5
-
4.5
3.
150 m
55
45
49.1
49.1
-
4.1
4.
200 m
55
45
46.1
46.1
-
1.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
181
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Assumed Limit
dB(A)
Receiver Name
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Level dB(A)
Conflict dB(A)
Day
Night
Day
Night
Day
Night
5.
250 m
55
45
43.8
43.8
-
-
6.
500 m
55
45
37.0
37.0
-
-
5.5.7
Mitigation Measures
Although there was no increase beyond the allowable limit predicted at any of the noise monitoring
locations outside the project site, the noise environment also includes the people who are working
within the project site, and who may face permanent hearing damage in case they face the Noise
Dosage beyond the allowable level of Noise. Therefore, it is important to implement the following
mitigations in order to avoid any permanent hearing damage to the people working inside the project
site.
Table 5-9: Mitigition Measures
S.
No.
Source
Predicted
SPL at 1
m
Description
Impacts
Mitigation
This is an unavoidable
source of noise, which
cannot be attenuated by any
means. However, the
following can be done:
1.
2.
Machinery
Drilling Rig
90 dB
Pile Drivers,
Bulldozers,
Loaders etc.
involved for site
clearing and
preparation will
generate noise
105 dB
Noise is
generated
because of
drilling operation
as well as
because of the
driving
mechanism of
the Drilling Rig
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
High Noise levels upto
90dB when measured
at a distance of 1 m
from the machine.
When multiple
machines are running
simultaneously, the SPL
can go upto 95 dB.
High noise up to a level
of 105 dB will be
generated as drilling
operation is mostly
driven by powerful
engines
While choosing the
machinery for the
project, machines with
lowest Sound Pressure
Levels claimed by the
manufacturers should be
chosen
The machinery should be
regularly maintained with
oiling and other
preventive maintenance
in order to keep the
Noise Levels generated
by the machines to as
low as possible
Powering Engines should be
covered with Acoustical
Enclosures. Care should
be taken while designing
these enclosures that
required ventilation
system is provided for
this acoustical enclosure.
Transmission Loss
Recommended: 30 dB
182
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
Source
Predicted
SPL at 1
m
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Description
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impacts
Mitigation
STC.
The Drilling Rig should be
operated during the daytime hours as during the
night time, the noise
generated by the drilling
rig is likely to affect the
surrounding areas for up
to 1 kilometer radius
3.
4.
DG Sets
Vehicles/Traffic
<85 dB
<80 dB
DG sets running
on diesel engines
Vehicular traffic
due to project
activity
Diesel Generator Sets
are supposed to have
Sound Pressure Levels
of lesser than 75 dBA
when measured at 1
meter distance.
No such mitigation is
required.
Noise levels generated
by vehicles are usually
lesser than 80 or 85 dB,
and are not likely to
affect any areas beyond
200 meters from the
drilling rig sites.
Vehicles should be regularly
maintained so that any
internal failure may not
lead to increased Sound
Pressure Level of the
vehicles
Controlled operating hours
for noisy activities such
as delivery, loading,
unloading etc should be
chosen
The additional mitigation measure / care to be taken are as described below:



Temporary sound reflective barriers to be kept surrounding the drilling site of the project
The minimum height of the barriers should be 2.5 m and with 15 dB shadow zone transmission
loss rating
All people working in the vicinity of the equipment/machinery with SPL higher than 85dB should
wear protective ear plugs to avoid permanent hearing damage
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
183
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.5.1-5.5.3, the impact scores on noise environment are likely to be as mentioned in
Table 5-10
Table 5-10: Impact Scoring of Noise
Impact Scoring
Cod
e
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
1
Clearance of
vegetation at site and
preparation of
approach road
1
5
5
Moderate risk, Probability is
given a higher score as this
is exploratory drilling and
clearance of site will happen
every time during drilling at
different locations,
consequence is given a
lower score as this activity
will be completed in a very
short duration
2
Excavation and paving
of site
1
3
3
Low risk
3
Vehicle Movement for
transportation of rig,
materials and
equipment
2
3
6
Moderate risk, vehicles
transferring materials will
pass through village roads
at many places i.e.
consequence is given a
higher score
4
Setting up the rig
floor and derrick,
handrails, guardrails,
stairs, walkways,
ladders , flare stack,
drilling fluid
circulating system &
other equipment and
machinery
1
3
3
Low risk
5
Drilling Process
2
5
10
High risk due to high
probability of occurrence as
D.G set, rig machineries and
mud pump will run for
almost entire drilling
program
6
Blow out
5
1
5
Low risk as probability of
occurrence of blow out is
very low
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
184
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impact Scoring
Cod
e
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
7
Dismantling of rig &
associated
machineries
1
2
2
Low risk
5.6
Hydrology
The proposed drilling operation would include water requirement for site preparation, drilling of wells
to the depth of up to 3000m and drilling site activities, which involves use of water for domestic
purpose and for mud preparation and would cause generation of waste water. Following potential
impacts may cause from proposed project:
5.6.1
Impact on water resources
The project is drilling of 22 (twenty two) Exploratory wells. This requires 35 KLD water per well and
drilling activity for any well will be continuing for maximum upto 40 days. Total numbers of wells for
exploration are 22, hence total water requirement will be 22 ×35 KLD ×40=30800 KL.
ONGC has planned to meet the requirement of water at the drilling site through water supplied by
tankers sourced from nearest ONGC installation.
5.6.2
Impact on Water Quality
The waste water will be generated from domestic activities and from different processing activities.
Approximately 2.5 KLD of domestic waste water will be generated, if the domestic waste water
discharges into the nearby surface water body, it may have some negative impact on surface water
quality. But all the waste water generated from domestic activities will be sent to the soak pit.
The drill site will also generate waste water comprising of drain out from rig, equipment washing,
cement preparation and other sources. Waste water will be generated intermittently and it will be sent
to a HDPE lined waste pit where the waste water will be allowed to evaporate.
5.6.3
Mitigation Measures
Following mitigation measures will be implemented for water pollution control:


Efforts will be made to reduce water requirement;
All chemical and fuel storage areas will have proper bunds so that contaminated run-off
cannot meet the storm-water drainage system;
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.6.1-5.6.2, the impact scores on surface water environment are likely to be as mentioned
in Table 5-11
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
185
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-11: Impact Scoring of Surface water
Impact Scoring
Code
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
1
Chemical & fuel
storage
2
Storage handling
and disposal of
waste water
5.7
C3
2
2
C4
1
1
C5
C6
2
Low risk, Probability is
given a lower score as
ONGC will take proper care
during storage and
material will be stored on a
paved surface, in addition
the location will be
selected such that a safe
distance is maintained
from water bodies if any
2
Low risk, pit will be of
sufficient volume and lined
properly by HDPE sheets
so damage due to waste
water would be minimum
Ground Water
Ground water is an environmental parameter that could be affected by the drilling activities. Potential
impacts on the ground water arising from drilling activities are:
5.7.1
Effect on Ground water regime
The compaction of the working areas for setting up heavy machineries and equipments like the rig
may lead to increased runoff and reduced infiltration, thereby affecting subsurface groundwater
recharge at local level. This can affect local users, who are still dependent on ground water for various
needs. However, the drilling operation being a temporary activity will not become a cause of
permanent loss to ground water recharging. Hence, the effect on the groundwater regime will not
affect water availability of the area.
5.7.2
Contamination of Subsurface Groundwater
Possibility of subsurface groundwater contamination from site drainage or accidental spillage of fuel,
lubricants and chemicals from storage areas, vehicles and machineries is always there, if they are not
properly designed or maintained. Contamination of subsurface groundwater can also occur in case of
frequent accidental discharge on soil. The possibility of contamination of subsurface and lower and
possibly unconfined aquifers also exist, if in case, the casing and cementing of the well is not carried
out properly, which may lead to infiltration or seeping of drilling chemicals or mud into porous aquifer
region.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
186
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
5.7.3
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impact on Resources
Water is required for drilling operations and domestic consumption purpose. The quantity of water is
very less and only require for once. This will leads to lose in the minor quantity of water. However,
Tharad of Banaskatha block, Mansa and Gandhinagar of Gandhinagar block are Over-Exploited per
CGWA guidelines
5.7.4
Mitigation Measure
The following mitigation measures will be implemented:



ONGC will ensure proper spill control at site;
ONGC will take proper care that ground water does not get contaminated due to leak in the
HDPE lined pit;
ONGC will use best engineering technique during drilling operation and also during the
cementing job and installation of casing so that drilling mud does not contaminate the ground
water.
Ground Water Recharge
The hydrogeological conditions of the area shows that water is withdrawn/available only from the
aquifers under confined conditions. To replenish these aquifers, groundwater recharge through
injection wells is suggested. Narmada canal water can be used for recharge in consultation with
Government of Gujrat
Though the consumption for drilling is one time event but maintaining manpower for operational
purpose will be a long term phenomenon. ONGC, as an enterprise, is working in entire north Gujarat
and can take groundwater recharge in the area proposed in previous paragraph. The funds may be
allocated under Company Social Responsibilities (CSR) activities. The suggestions will need feasibility
study for implementation as regards to availability of sufficient water and well location with aquifer
characteristics.
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.7.1-5.7.2, the impact scores on ground water environment are likely to be as mentioned
in Table 5-12
Table 5-12: Impact scoring Ground water
Impact Scoring
Code
C1
1
Impacting
Activity
C2
Chemical and Fuel
storage
Final
Consequence,
C
Probability, P
C3
C4
2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Score
Remarks
CxP
1
C5
C6
2
Low risk, Probability is given a
lower score as ONGC will take
proper care during storage
and material will be stored on
a paved surface
187
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impact Scoring
Code
Impacting
Activity
Final
Consequence,
C
Probability, P
Remarks
Score
CxP
C1
C2
C3
C4
C5
C6
2
Use of raw water
for drilling
1
4
4
Moderate Risk however the
drawl quantity is less than 50
KLD( for 35 days only)
3
Circulation and
cementing
4
1
4
Moderate risk, Probability is
given a lower score as ONGC
is having proper cementing
methodology
4
Storage handling
and disposal of
waste water
2
1
2
Low risk
5.8
Land Environment
Potential impacts on land environment due to drilling activities are given below:
5.8.1
Land Acquisition leading to change in land use
The drilling activities will require leasing of land for which voluntary land acquisition will be carried out,
based on mutually agreed terms and conditions. We understand that forced land acquisition is not
considered an option and land acquisition is by mutual consent and negotiation, with purchase at a
fair agricultural loss estimate / market dictated price. This will change the land use from agricultural to
non-agricultural (industrial). Compulsory land acquisition under the Land Acquisition Act, 1891, will not
be resorted to.
5.8.2
Impact on land Environment during Site preparation
Clearance of Vegetation and Preparation of Access Roads
The land use of the drill site will get affected typically from agricultural land to industrial due to
preparation of the drilling site and associated activities like installation of rig & machineries, temporary
storage of drilling material including oil and chemicals, domestic waste and other kind of waste
material etc. This is perhaps unavoidable considering that drilling locations need to follow the geophysical and other requirements to successfully tap hydrocarbon reservoirs.
These impacts will occur in terms of temporary clearing of ground vegetation of around 110 m x 110
m area.


For 10 wells in CB-ONN-2010/1 assuming an area of 1.21 ha (110 x 110 m) per operational
well, a total land take of upto 12 ha can be expected at the maximum.
For 7 wells in CB-ONN-2010/6 assuming an area of 1.21 ha (110 x 110 m) per operational
well, a total land take of upto 9 ha can be expected at the maximum.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
188
OIL AND NATURAL GAS CORPORATION
LIMITED

EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
For 6 wells in CB-ONN-2010/9 assuming an area of 1.21 ha (110 x 110 m) per operational
well, a total land take of upto 8 ha can be expected at the maximum.
In addition to the above land take, land is also required to acquire right of way / use for accessing well
locations. To the extent possible, this is done by strengthening existing roads, however, at times this
is not possible, necessitating additional land acquisition. This can often be useful, by adding transport
infrastructure to the study area, but also leads to enhanced land use changes. The extent of the
additional land take for the purpose of access road construction is difficult to estimate currently, but
assuming that it will be in the order of 50 m per well (an approximate figure based on our interviews
with operating personnel),



For 10 wells it could be upto 0.18ha.
For 7 wells it could be upto 0.12ha.
For 6 wells it could be upto 0.10ha.
The land take figure for preparing access roads is thus likely to be nominal.
It is important to note that the likely change in land use and land cover due to the project is likely to
be in the order of 0.01% of the study area of Block CB-ONN-2010/1; 0.02% of study area of Block CBONN-2010/6 and 0.01% of study area of Block CB-ONN-2010/9, a relatively modest figure.
Excavation and Paving of Site
Excavation and paving of site will lead to change in land use.
5.8.3
During Drilling Operation
The entire exploratory drilling operation, being a temporary activity, will not require any kind of land
acquisition (as it involves temporary leasing of land) and neither involves clearing of any trees, except
few ground vegetation if present at the proposed drilling site. During drilling activities, soil property
may get affected due to clearing of undergrowth for movement of truck load with drilling rig &
associated machineries and crews.
5.8.4






Mitigation Measures
Necessary efforts will be made during selection of drill site to minimize disruption of current
land use to the extent possible;
Necessary restoration efforts will be made during decommissioning and site closure to restore
the site back to its original condition to the extent possible;
Proper restoration of site will be carried out to bring the physical terrain, soils and vegetation,
as closely possible, to their original condition;
On completion of works (in phases), all temporary structures, surplus materials and wastes
will be completely removed till 1m below the surface;
Temporary new approach roads can be constructed and existing roads can be improved, if
required, for smooth and hassle free movement of personnel as well as materials and
machineries;
Optimization of land requirement through proper site lay out design will be a basic criteria at
the design phase;
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
189
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.8.2-5.8.3, the impact scores on land environment are likely to be as mentioned in Table
5-13
Table 5-13: Impact Scoring Land
Impact Scoring
Code
Impacting Activity
Final
Consequence,
C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
1
Land lease or purchase
3
1.6
4.8
-
2
Clearance of vegetation
at site and preparation of
approach roads
3
1.3
3.9
-
3
Excavation and paving of
site
3
1.6
4.8
Topography of site may
change during drilling
4
5.9
Site restoration
3
1.6
4.8
But care will be taken so
that the drainage pattern if
any remain undisturbed
Soil Quality
Soil quality may be affected by setting up of rig and associated machinery and will continue till the site
is restored to its original condition. The impacts would be degradation of soil or change in its structure
due to compaction and erosion during site preparation activities and plying of trucks during
construction and operational phase.
5.9.1
Topsoil Contamination
During site preparation the topsoil will be removed from the project site and the approach road, which
contains most of the nutrients and organisms that gives soil its productivity. This in turn will result in
minor changes of topsoil structure. However, the project design will take into account the preservation
of the top soil and its subsequent use during the restoration of the site. In spite of this the fertility of
the soil at the site area will be affected.
5.9.2
Compaction of Soil
The setting up of the rig and associated machinery will require a strong base for being set up properly
and piling equipment will be used for compaction of the soil, so that it can take the load of the
equipments. Compaction of the soil will also occur due to the movement of heavy trucks on the
approach road connecting highways or village roads to the site for transfer or rig and other
equipments. The compaction of surface soil may result in a change in soil texture thereby changing
the drainage patterns and water-logging in nearby areas.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
190
OIL AND NATURAL GAS CORPORATION
LIMITED
5.9.3
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Soil Contamination
Contamination of soil can result from the project activities if certain operations like storage of
chemicals and fuels, cement and mud preparation, spent oil and lubricants are not managed efficiently
however probability of this are low. Storage of chemicals and fuels, spent lubricants on unpaved
surfaces also have a potential for soil contamination. If in case, chemicals, drilling mud, oil and
lubricants are spilled accidentally on open soil, either during transportation or during handling, it will
cause soil contamination. Improper storage of drilling waste and return/unused drilling mud at the onsite waste disposal facility can also result in contamination of the soil.
Process waste e.g. drill cuttings and return mud generated during drilling operations will be stored in
an HDPE lined impervious pit and disposed off in accordance with Notification dated 30th August 2005
- G.S.R 546 (E) point no C “Guidelines for Disposal of Solid Waste, Drill Cutting and Drilling Fluids for
Offshore and Onshore Drilling Operation”. Drill cuttings are likely to be generated from each well. This
may cause soil contamination, if not disposed or reused properly. However, the whole drilling process
being a temporary activity would not cause any long term impact on the environment.
5.9.4





Mitigation Measures
Store, preserve and protect topsoil separately to use it during restoration period;
Carry out adequate restoration of soil at the drilling site, to the extent possible using the soil
stored from piling and excavation activities;
Dispose drilling mud and drill cutting temporarily in an impervious HDPE lined pit for
evaporation carefully so that there is no spillage.
Management of spilling of contaminants such as oil from equipments, cement, drilling mud,
and etc. on the soil;
Proper designed soak pits will be provided at the drilling site for disposal of ~domestic waste
water;
Considering the above mitigation measures as well as the operating and other conditions mentioned in
Sections 5.9.1-5.9.3, the impact scores on soil environment are likely to be as mentioned in Table
5-14
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
191
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-14: Impact scoring of soil
Impact Scoring
Code
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
1
C2
Clearance of
vegetation at site and
preparation of
approach roads
C3
1
C4
5
C5
C6
5
Probability is given a high
score as this is exploratory
drilling and this will happen
every time during the
drilling
2
Excavation and paving
of site
2
3
6
Consequence is given a
lower score as all the top
soil excavated will be used
to cover the HDPE lined
evaporation pit
3
Setting up the rig floor
and derrick, handrails,
guardrails, stairs,
walkways, ladders ,
flare stack, drilling fluid
circulating system &
other equipment and
machinery
1
3
3
Low Risk
4
Work force
accommodation and
sanitation
1
1
1
Low Risk
5
Chemical and fuel
storage
1
1
1
As the storage will be done
on paved surface the
probability is given a lower
score
6
Preparation of drilling
fluid
1
1
1
Low Risk
2
Low Risk, As Drill cuttings
and spent mud will be
disposed off in HDPE lined
pit
2
Low Risk, Probability is
given a lower score, since
ONGC have proper casing
and cementing policy
2
Low Risk, Probability has
given lower score, since
ONGC have proper casing
and cementing policy
7
Drilling Process
8
Installation of casing
9
Circulating and
cementing
1
2
2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
2
1
1
192
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impact Scoring
Code
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
10
Storage, handling and
disposal of
solid/hazardous waste
2
1
2
11
Storage, handling and
disposal of waste water
2
2
4
12
Blow out
4
1
4
13
Dismantling of rig and
associated machinery
1
5
5
5.10
C6
Low risk, since blow outs
are very rare and Blow out
preventer will be installed to
prevent blow outs
Socio- Economic Environment
Critical analysis of the existing socio-economic profile of the area vis-à-vis its scenario with proposed
project activities identifies the following impacts



The proposed activities shall generate indirect employment in the region due to the
requirement of workers in trail making, supply of raw material, auxiliary and ancillary works,
which would marginally improve the economic status of the people.
The activities would result in an increase in local skill levels through exposure to activities.
As the existing loose / soft surface roads, trails shall be upgraded to facilitate the movement
of the heavy equipment required, the project in turn would lead to improvement in transport
facilities.
5.10.1 Mitigation Measures



Proper compensation for land and crop based on prevailing Government rates will be provided
by project proponent (ONGC)
Approach roads will be upgraded to facilitate heavy vehicular movement
Project proponent may provide educational aid to local villages based on need and request
from the village Panchayat.
Considering the above mitigation measures as well as the other conditions, the impact scores on socio
economic environment are likely to be as mentioned in Table 5-15
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
193
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-15: Impact scoring of socio economic
Impact Scoring
Code
Impacting Activity
Final
Consequence, C
Probability, P
Score
Remarks
CxP
C1
C2
C3
2
C4
2
C5
C6
(+4)
This will have positive
impact as ONGC will provide
compensation as per
Government approved rates
to the owners
2
1
(-2)
Due to the loss in
agriculture productivity as
land would be converted to
oil and gas production
parcel from agriculture land,
probability has given a
lower score as most of the
locations wil be drilled from
existing site
2
Clearance of
vegetation at site and
preparation of
approach roads
1
3
(+3)
This is a positive impact due
to creation of jobs,
3
Excavation and
paving of site
1
3
(+3)
This is a positive impact due
to gain in income from
generation of employment
(+4)
Few local vehicles will be
hired by ONGS which will
give temporary income to a
few local peoples
1
Land lease or
purchase
2
4
5
Vehicle movement for
transportation of rig,
material and
equipment
Work force
accommodation and
sanitation
2
3
1
(-3)
The probability is given a
lower score as ONGC will
strengthen the village roads
where ever required before
plying of heavy vehicles
1
2
(+2)
This is a positive impact
considering creation of
jobs/income
(-1)
This is considering possible
migration from outside
which may change existing
social profile of area
1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
1
194
OIL AND NATURAL GAS CORPORATION
LIMITED
5.11
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Ecology and Biodiversity
5.11.1 Determination of Ecological Components Likely Impacted
Following components are determined which may face likely impacts in different phases due to various
project activities. Details are tabulated in the Table 5-16.
Table 5-16: Determination of Impacting Ecological Components
S. No.
Activity
Ecological Components
Aspect
TFL
TFA
AFL
AFA
MFL
MFN
√
√
--
--
--
--
--
√
--
--
--
--
--
√
--
--
--
--
√
√
--
--
--
--
√
√
--
--
--
--
--
√
--
--
--
--
1. During Pre Commissioning stage
1.1
1.2
Site Preparation and
Formation of approach
roads / access tracks
Removal of herbs,
shrubs and grasses
Movement of machinery,
workers / labors etc at site.
Generation of noise
2. During Rigging up and drilling State
2.1
2.2
Drilling and movement of
vehicles, machinery,
workers/ labors for
mechanical / engineering /
technical work etc.
Generation of noise
and vibration
Blow out
emission
of
hydrocarbon & heat
generated
during
blow out
3. During Decommissioning
3.1
Leaving / deserting /
dumping of waste materials
Pollutant substances
4. During Both Stages
4.1
Vehicle movements
Careless driving
5.11.2 Likely Impacts on Ecological Components
As discussed earlier, environmental aspects and impacts have been identified based on an assessment
of environmental aspects associated with the project. Potential impacts on Ecology and Biodiversity
are given in Table 5-17.
Table 5-17: Aspect – Impact Identification
S. No.
Project Aspects
Likely Impacts on Ecology and Biodiversity (EB)
with in 1 km area.
C1
C2
C3
1. Pre Commissioning stage
1.1
Removal of herbs, shrubs and grasses
(within and outside project site and)
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Impact-1: Loss / damage of floral diversity and
Impact-2: Disturbance to faunal diversity
195
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
S. No.
Project Aspects
1.2
Noise will be generated due to movement
machinery and vehicles at site.
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Likely Impacts on Ecology and Biodiversity (EB)
with in 1 km area.
Impact-3: Habitat fragmentation
Impact-4: Disturbance to normal faunal movements in
surrounding habitats
2. Rigging up and Drilling Stage
2.1
Generation of noise and vibration due to
drilling, transport machinery,
workers/
labors for mechanical / engineering /
technical work etc.
Impact-5: Site specific disturbance to normal faunal
movements
2.2
Emission of hydrocarbon & heat generated
during blow out (accidental event)
Impact-6: Damage to surrounding floral and faunal
components
3. During Decommissioning
3.1
Leaving / deserting / dumping of waste
materials at site
Impact-7: Contamination of habitats
4. During Pre Commissioning and Decommissioning Stage
4.1
Careless or off-road driving can cause
accident
Impact-8: Mortality of wildlife species
5.11.3 Quantification of Impacts
Impacts on the flora, fauna and habitats have assessed in the following table on the basis of
multiplication of consequence and probability scorings. Two major activities found to be impacting to
the ecological components. Final scores are obtained for impacting activities and they are tabulated
bellow in Table 5-18
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
196
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-18: Impact Scoring
Code
Likely Impacts and Scoring
Justification
C1
1
2
Impact Scoring
Significance
Consequence,
C
Probability,
P
Final Score
C2
C3
C4
C5
C6
Impact-1: Loss / damage of floral
diversity: Common species of flora
(except trees) will be cleared.
1
5
5
Insignificant
1
5
15
Insignificant
2
5
10
Moderate
Severe
3
5
15
Moderate
Severe
2
5
10
Moderate
Severe
Impact-2: Disturbance of faunal
diversity: some wild generalist
species may face temporary
CxP
disturbance.
Impact-3: Habitat fragmentation:
3
4
Though the footprint of the
proposed project is very small,
surrounding area forms intact
habitat structure so some minor
consequence are expected.
However, these changes will be
resilient.
Impact-4: Disturbance to normal
faunal (mainly wild generalist
species) movements: Due to noise
generated by machinery and
vehicles
Impact-5: Disturbance to normal
faunal movements: some wild
generalist species have been
5
reported from the surrounding may
face some level of disturbance.
Since the area is scrub /agriculture
land, impact of vibration will be less.
6
Impact-6: Damage to surrounding
floral and faunal components (rare
accidental event13)
5
1
5
Insignificant
7
Impact-7: Contamination of habitats
5
1
5
Insignificant
5
2
10
Moderate
Severe
8
Impact-8: Mortality of wildlife
species
1
13 During 2002-2006 there were 39 blowouts and 38,856 wells drilled. (OGP. Risk Assessment Data Directory 2010. Report No. 343-2. Blowout Frequencies).
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
197
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
5.12 Mitigation Measures
Looking towards the likely impacts following mitigation measures will be implemented (Table 5-19).
Details regarding plantation scheme and plant species have been described in the EMP section.
Table 5-19: Likely Impacts and Mitigation Measures
Code
Likely Impacts
Mitigation Measures
C1
C2
C3
Loss / damage of floral diversity (Impact-1)
No immediate action required. However reclamation of site
and surrounding areas (with in 1 km) are recommended /
required with suggested plant species. No trees or saplings
will be uprooted and low dense vegetated areas or open
spaces will be used during road construction. Tree saplings
and trees (if present at site) will be protected with mesh
tree guards. However, permission from competent
authority will be taken if tree cutting is required.
1
2
Disturbance to faunal groups / diversity
(Impact-2, 4 and 5)
Along with other operational controls, plantation along the
fencing will be carried out to reduce noise levels due to
various activities at the project site.
3
Habitat fragmentation (Impact-3)
Reclamation of project site and surrounding areas (with in
1 km) will help to improve fragmented / degraded habitat
in post drilling phase.
6
Damage to surrounding floral and faunal
components due to blowout (Impact – 6)
It is a rare accidental event which requires continuous
surveillance.
7
Contamination of habitats due to deserted /
dumped/ left material at the site (Impact-7)
All waste material should be checked for its toxicity /
hazardous nature and should be properly disposed.
8
Mortality of wildlife species (Impact – 8)
All drivers will be warned to keep speed limit of 20-25
within the impact zone to avoid mortalities of wildlife.
5.13
Occupational Health and Risk to Surrounding Community
Site preparation, drilling and post drilling activities involve many occupational health hazards to the
workers at site.
Noise generated during drilling operation may affect the workers and staff members
Handling of chemicals, fuel, may cause health hazard if not handled properly
Uncontrolled flow of hydrocarbon or other fluids during blow out may cause serious health injuries
including fatality of workers as well as surrounding communities
5.13.1 Risk and Hazards
In this section, the possibilities of accidental events that may be encountered in the proposed drilling
activities are assessed. Details of the hazards and safety measures have been identified. The analysis
is based on known potential failure causes for storage vessels, pipelines and other system components
and case histories, type of operations to be carried out in the proposed project and past experience of
the consultants.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
198
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
5.13.2 Hazard Identification
Hazard Associated with Drilling Activities
The project description, and other project related data provided by the client have been
comprehensively reviewed to identify the hazardous operations. Also the information on the hazardous
properties (MSDS) of all the chemicals handled at the site has been reviewed to identify the hazards
associated with the same. Key equipment associated with potential hazards is summarized in Table
5-20.
Table 5-20: Key Plant Equipment with Quantities, Material Contained & Operating Conditions
No. /
S.
No.
Component
MOC
1
2” diameter piping (for
transportation of HSD
from storage tank to
D.G Set & Diesel
generator)
MS
Length: 30 m
2
HSD Fuel Storage Tank
MS
40 KL
Quantity
Maximum Operating
Pressure / Flow Rate
1 kg/cm2
1 kg/cm2
(Hydrostatic pressure in
case of partial leaks)
Control System /
Indicators
Visual observation
Level indicator,
earthing, flame arrestor
& visual observation
Hazard Inventory
Definition of hazardous chemical is based on the Manufacture, Storage, & Import of Hazardous
Chemicals Rules, 1989 as amended in 2008 with inputs from MSDS’ of relevant chemicals and
available database software such as the United States Environment Protection Agency (USEPA’s)
CAMEO software suite.
Flammable Gases
Natural gas (Methane) may come along with crude oil from the drilling well, which is flammable gas.
In accordance with the Oil Mines Regulation Rules, 1984, a flare stack of 9m height will be provided.
Flammable Liquids
HSD fuel is flammable liquid. Release of HSD from storage tank and leak through pipeline have been
considered in the present study.
5.13.3 Event Classification and Modes of Failure
Component failures are the initiating events for the failure scenarios, which can escalate to
consequences like fires, explosions and equipment damage. Eventual failures could be in the form of
small gasket leaks in a flange joint or guillotine failure of a pipeline or even rupture / catastrophic
failure of equipment. Major failure modes identified in this project are:


Pipeline - small/large leaks;
Storage tank - small/large leaks
Hazards that can lead to accidents in operations are discussed in this section. Important hazardous
events are classified and defined in Table 5-21.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
199
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Table 5-21: Event Classification
Type of Event
Description
BLEVE
Boiling Liquid Expanding Vapour Explosion; may happen due to catastrophic failure of
refrigerated or pressurized gases or liquids stored above their boiling points, followed by
early ignition of the same, typically leading to a fire ball
Deflagration
Is the same as detonation but with reaction occurring at less than sonic velocity and
initiation of the reaction at lower energy levels
Detonation
A propagating chemical reaction of a substance in which the reaction front advances in
the unreacted substance at or greater than sonic velocity in the unreacted material
Explosion
A release of large amount of energy that form a blast wave
Fire
Fire
Fireball
The burning of a flammable gas cloud on being immediately ignited at the edge before
forming a flammable/explosive mixture.
Flash Fire
A flammable gas release gets ignited at the farthest edge resulting in flash-back fire
Spill Release
‘Loss of containment’. Release of fluid or gas to the surroundings from unit’s own
equipment / tanks causing (potential) pollution and / or risk of explosion and / or fire
Structural Damage
Breakage or fatigue failures (mostly failures caused by weather but not necessarily) of
structural support and direct structural failures
Vapor Cloud Explosion
Explosion resulting from vapour clouds formed from flashing liquids or non-flashing
liquids and gases
5.13.4 MCLS Selected for Consequence Assessment
On the basis of the discussions in this chapter, the MCLS’ selected for further study are described in
Table 5-22
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
200
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION
MEASURES
Table 5-22: Event Classification
S.
No.
Component
1.
Piping – 2” diameter
[1.0 kg/cm2] For
transportation of HSD
from storage tank to
Diesel Engines
2.
HSD Storage Tank
MOC
MS
MS
No. /
Quantity
Length: 30 m
(Max.)
1 No. (40 KL)
Material(s)
Modeled
Types of Failure
Possible
Consequences
Studied
Control System
/ Indicators
Visual observation
Flammable
liquid: HSD
Line rupture
Flammable
10 mm, 25 mm hole
in tank
liquid: HSD
Maximum Operating
Pressure / Flow Rate
Catastrophic
Rupture of storage
tank (100%
contents)
1.0 kg/cm2
1 kg/cm2
(Hydrostatic pressure in
case of partial leaks)
Pool Fire & Jet
Fire
Pool Fire &
Explosion
Ready availability
of fire
extinguishers.
Level indicator,
earthing, flame
arrestor & visual
observation
Remarks
Stoppage
by
operator
by closing
valve.
Stoppage
by
operator
Note: Materials Modeled: This have selected on the basis of the Technical Paper by the World Bank
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
201
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
5.13.5 Consequence Analysis
Consequence analysis is accomplished by estimating various components required prior to
accomplishing the final task of risk assessment. Risk is considered to be a function of frequency
(likelihood of occurrence of a given event) and damage (generally expressed in terms of fatalities to
people; but also injuries and property damage) caused by the occurrence of the event. Before
estimating damage, it is required to find out the release quantities and their primary consequences.
This is done using intermediate steps of source modeling and consequence assessment. These steps
are described in this section.
Toxic, flammable and explosive substances released from sources of storage as a result of failures or
catastrophes, can cause losses in the surrounding area in the form of:



Toxic gas dispersion, resulting in toxic levels in ambient air,
Fires, fireballs, and flash back fires, resulting in a heat wave (radiation), or
Explosions (Vapour Cloud Explosions) resulting in blast waves (overpressure)
Consequence of Fire/ Heat Wave
The effect of thermal radiation on people is mainly a function of intensity of radiation and exposure
time. The effect is expressed in terms of the probability of death and different degrees of burns.
Damage due to radiation intensity and overpressure are given in Table 5-23 and Table 5-24
respectively.
Table 5-23: Damage due to Radiation Intensity
Radiation (Kw/m2)
Damage to Equipment
Damage to People
1.2
Solar heat at noon
1.6
-
2.0
PVC insulated cable damage
4.0
-
Causes pain if duration is longer than 20
sec. But blistering is unlikely.
6.4
-
Pain threshold reached after 8 sec.
Second degree burns after 20 sec.
12.5
Minimum energy to ignite wood with a
flame; melts plastic tubing.
1% lethality in one minute. First degree
burns in 10 sec.
16.0
-
Severe burns after 5 sec.
25.0
Minimum energy to ignite wood at
identifying long exposure without a flame.
100% lethality in 1 min. Significant
injury in 10 sec.
37.5
Severe damage to plant
Minimum level of pain threshold
100% lethality in 1 min.
50% lethality in 20 sec.
1% lethality in 10 sec.
Table 5-24: Damage due to Overpressure
Overpressure bar
Damage
1
Fatality
0.41
Ear Drum Rupture to humans
0.2
Structural Damage to buildings
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
202
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Overpressure bar
Damage
0.03
Glass Damage
Reference: World Bank Technical Paper no. 55- Technical Ltd. For assessing hazards – A manual
5.13.6 Consequence of Containment Failure and Release of Material into Environment
The model is very useful in risk assessment studies where, frequency results provided in this report
are based on the above, generalized, algorithm and from published failure data.
Weather condition selected are 1.8/B (prevalent during the day), 1.4/F (prevalent during the night)
and 4.0/D (prevalent during monsoons) has been considered for modeling.
5.13.7 Release of HSD
Release of HSD can occur from two scenarios.


Release of HSD due to full bore rupture of the pipeline transferring HSD from tanker to HSD
storage tank.
Release of HSD due to 10mm hole in HSD storage tank, 25mm hole in HSD storage tank, and
catastrophic failure of the HSD storage tank.
It is expected that ONGC would have 40 KL (1 no) capacity tank for diesel storage at drilling site.
Table 5-25: Radiation Level and Effect Distance Due to release of HSD
Failure
Scenarios
Met.
Consequences
Jet fire
10 mm
equivalent
diameter leak in
HSD Storage
Tank
Early Pool fire
Late Pool fire
Jet fire
25 mm eq. dia
leak in HSD
Storage Tank
Early Pool fire
Late Pool Fire
Effect Distance in Meters to Radiation Level
Data
1.6
kW/m2
4 kW/m2
12.5
kW/m2
37.5 kW/m2
1.8/B
19.01
14.84
11.50
9.35
1.4/F
19.06
14.98
11.70
9.58
4.0/D
17.9
13.67
10.31
8.20
1.8/B
33.95
24.73
16.80
9.24
1.4/F
33.82
24.55
16.23
9.16
4.0/D
34.26
25.95
18.81
10.08
1.8/B
72.31
47.85
21.25
N.R.
1.4/F
72.12
46.37
20.88
N.R.
4.0/D
75.21
54.28
23.54
N.R.
1.8/B
37.34
29.04
22.48
18.39
1.4/F
37.04
29.02
22.65
18.65
4.0/D
35.83
27.27
20.57
16.53
1.8/B
54.51
39.26
23.17
13.25
1.4/F
54.15
38.34
22.15
13.36
4.0/D
56.34
41.49
27.20
13.24
1.8/B
130.92
82.29
38.50
N.R.
1.4/F
131.44
80.91
39.84
N.R.
4.0/D
137.82
94.78
38.59
N.R.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
203
OIL AND NATURAL GAS CORPORATION
LIMITED
Failure
Scenarios
Met.
Consequences
Jet fire
Full Bore
Rupture of the
3" dia Hose
transferring HSD
from tanker to
Storage Tank
Early Pool fire
Late Pool Fire
Catastrophic
rupture of HSD
storage tank
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Late pool fire
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Effect Distance in Meters to Radiation Level
Data
1.6
kW/m2
4 kW/m2
12.5
kW/m2
37.5 kW/m2
1.8/B
27.08
21.35
16.78
13.82
1.4/F
23.82
18.89
14.92
12.27
4.0/D
29.72
22.98
17.70
14.49
1.8/B
71.3
46.24
19.18
-
1.4/F
69.64
43.99
18.56
-
4.0/D
74.97
53.31
21.36
-
1.8/B
177.51
109.77
51.17
N.R.
1.4/F
175.26
106.26
51.91
N.R.
4.0/D
189.06
127.47
51.22
N.R.
1.8/B
183.36
113.36
53.05
N.R.
1.4/F
179.95
109.43
54.00
N.R.
4.0/D
201.51
137.27
58.23
N.R.
N.R – Not Reached
Figure 5-7: Risk Contours for Jet Fire Due to 10 mm Equivalent Diameter Leak in HSD tank at
Weather Condition 1.8/B
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
204
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Figure 5-8: Risk Contours for Late Pool Fire Due to 10 mm Equivalent Diameter Leak in HSD
tank at Weather Condition 1.8/B
Figure 5-9: Risk Contours for Jet Fire Due to 25 mm Equivalent Diameter Leak in HSD tank at
Weather Condition 4.0/D
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
205
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Figure 5-10: Risk Contours for Late Pool Fire Due to 25 mm Equivalent Diameter Leak in HSD
tank at Weather Condition 4.0/D
5.13.8 Safety Consideration while Installation of Drilling Site Facilities
Site Layout
The site layout and buildings will be designed considering the following key safety issues:



The wind direction will be taken into consideration and then respective drilling facilities will be
arranged in the plot plan
The site perimeter will be appropriately fenced in the interests of security and public safety
Emergency exits and safe assembly point will be provided in all facilities as per regulatory
requirements including the Oil Mines Regulations, 1984
Drilling Site Facilities
Adequate general lighting arrangements shall be provided during working hours at the following
places:







Where the natural lighting is insufficient;
Derrick floor;
Driller’s stand and control panel;
Monkey board;
Every engine and pump house;
Derrick sub-structure near blowout preventer controls;
Every place where persons are to work;
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
206
OIL AND NATURAL GAS CORPORATION
LIMITED

EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Every means of escape, access or egress;
Fire Protection
Suitable fire-fighting equipment will be provided to take care of any eventuality. This will include
sufficient number of fire extinguishers located at strategic locations, enough storage of water in pit or
storage tank.
Personnel Safety







Suitable Personal Protective Equipment will be provided to all personnel
Essential equipment such as eyewash facilities will be provided at relevant locations
Antidotes for all chemicals being used as per MSDS will be kept ready at the site
First aid box will be kept at site and training in first aid provided
Work permit systems will be strictly followed
Safety training will be incorporated into routine activities
Every person employed at any drilling rig, work-over rig, well head installation, storage tank
or on such work where firefighting equipment may be required to be used, shall be trained in
the use of equipment & regular fire drills shall be held for this purpose.
5.13.9 Mitigation Measures





As per ONGC policy period medical checkup would be carried out in two stages which include
clinical examination and laboratory test if required
During site preparation proper care would be taken by ONGC, proper PPE will be provided to
site workers and staff members
Site preparation work will be carried out during day time only
Acoustic enclosures will be provided to DG sets and other noise generating equipment
ONGC will develop and implement a spill management plan to prevent risk of spill which may
cause health problem
Considering the above mitigation measures as well as the other conditions, the impact scores on
ecology and biodiversity environment are likely to be as mentioned in Table 5-26
Table 5-26: Impact Scoring of Occupational Health, Community Health & Safety
Impact Scoring
Code
Impacting Activity
Final
Consequence,
C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
1
Clearance of vegetation
at site and preparation of
approach roads
1
2
2
-
2
Excavation and paving of
site
1
2
2
-
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
207
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Impact Scoring
Code
Impacting Activity
Final
Consequence,
C
Probability, P
Score
Remarks
CxP
C1
C2
C3
C4
C5
C6
3
Vehicle Movement for
transportation of rig,
materials and equipment
1
1
1
-
4
Setting up the rig floor
and derrick, handrails,
guardrails, stairs,
walkways, ladders , flare
stack, drilling fluid
circulating system &
other equipment and
machinery
1
1
1
-
4
Probability is given higher
score since, Safety
Performance 2011 data of
OGP shows % fatalities in
land travel of about 23%,
which is highest amongst all
activities involved in drilling
operation
5
Workforce
accommodation &
Sanitation
2
2
6
Chemical and fuel storage
2
2
4
Consequence is given a low
score since ONGC follow
safety rules and regulation
strictly and provide PPE to
workers onsite and has
good past records
7
Preparation of Drilling
Fluid
1
1
1
Low risk
8
Storage handling and
disposal of solid/
hazardous waste
2
2
4
Low Risk
9
Storage, handling and
disposal of waste water
1
2
2
10
Blow out
2
2
4
-
11
Dismantling of rig and
associated machinery
2
2
4
-
5.14
Land Subsidence Due to Exploration of Oil & Gas
Subsidence is the motion of a surface (usually, the Earth's surface) as it shifts downward relative to a
datum such as sea-level.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
208
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANTICIPATED ENVIRONMENTAL IMPACTS
AND MITIGATION MEASURES
Land subsidence occurs when large amounts of ground water have been withdrawn from certain types
of rocks, such as fine-grained sediments. The rock compacts because the water is partly responsible
for holding the ground up. When the water is withdrawn, the rocks fall in on itself.
In order to study occurrence of Land Subsidence due to exploration of oil and gas, DGH has
undertaken study through Central Mining Research Institute to assess land subsidence in a gas field in
Gujarat
“It was concluded that during these nine campaigns from February 2004 to May 2006, only few
seasonal local minor negligible level changes are detected in the area under study, indicating that
overall the area is stable. Also the trend in the behavior of some points, which had been observed in a
particular region, has also now been proven to be due to seasonal variations, and no resultant
subsidence is observed. However, close monitoring is required in future, especially at some points to
estimate the trends, and the probable changes.”
In light of the above, it is explicitly clear that no resultant subsidence is observed even when the
reservoir is at very low depth (about 200 m below the ground surface level) and at a higher
withdrawal rate of gas.
Source: www.dghindia.org
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
209
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
6
ANALYSIS OF ALTERNATIVES
6.1
Alternative Drilling Locations
ANALYSIS OF ALTERNATIVES
At the time of selection of drilling locations a safe distance of ~ 500 m will be kept from the nearest
habitation and ~200 m from water bodies. Also the tentative well locations mentioned in the report
follow the same criteria.
6.2
Alternative Drilling Technologies
Conventional drilling technology (rotary drilling with WBM stabilization) for Onshore drilling will be
used by ONGC for its current drilling campaign.
6.3
Alternative Treatment Options
Drill cutting will be separated from drilling mud and analyzed for Oil and Grease (O&G) content. If
O&G content is found to be less than 10 Gram/kg ,the cutting will be disposed off(in-situ) in an
impervious lined pit and after drying it will be covered by an impervious liner and soil layer. If O&G
content is found to be higher than the 10 Gram/kg, drill cuttings will be temporarily stored in HDPE
lined pits / packed in bags and then disposed to TSDF.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
210
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
7
ADDITIONAL STUDIES
7.1
Disaster Management Plan
ADDITIONAL STUDIES
The Disaster Management Plan (DMP) is a guide, giving general considerations, directions and
procedures for handling emergencies likely to arise from planned operations. Site specific
documentation contingent to – and demonstrating suitable implementation of the DMP is described in
the annexures to the DMP. The annexures, being site specific, will require to be updated once the
actual site operations are underway.
The DMP must also be revaluated prior to start of operations and it is the responsibility of the Plant
Manager to do this. The DMP has been prepared for ONGC based on the Risk Assessment and related
findings covered in the earlier chapters of this report.
7.1.1
Disaster management Plan: Structure
The DMP is supposed to be a dynamic, changing, document focusing on continual improvement of
emergency response planning and arrangements. A structure working on a Plan, Do, Check & Review
(PDCR) cycle has been therefore suggested. Another advantage of doing this is to have a system that
is in synchronicity with commonly used EHS systems such as ISO 14001 and OHSAS 18000.
The DMP is covered in further detail in the remaining sections of this Chapter.
7.1.2
Policy
The Quality Health Safety & Environment policies are to be made accessible to all at site and to other
stakeholders. The policies must be framed considering legislative compliance, stakeholder
involvement, continual improvement, and management objectives.
7.1.3
Planning
Identification and Prevention of Possible Emergency Situation
Identification of Emergencies
Possible emergency situations can broadly be classified into toxic release, fire or explosion. While
doing so, it is stressed that these results are only for the modeled scenarios and, that the distances as
well as damages can change depending upon the actual development of a scenario. Additional
emergency situations can be developed on the basis of audit / HAZOP or other procedures prior to
commencement of operations.
Emergency Prevention
Some of the ways of preventing emergencies are as follows:


Preparation of a Preventive Maintenance Schedule Programme based on recommendations
given in Chapter 10 and also covering maintenance schedules for all critical equipment and
instruments as per recommendations of the manufacturers user manuals.
Importantly, it is of great importance to collect and analyse information pertaining to minor
incidents and accidents at the site, as well as for recording near-misses or emergencies that
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
211
OIL AND NATURAL GAS CORPORATION
LIMITED

EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
were averted. This information gives an indication of how likely or unlikely it is for the site to
face actual emergencies and what should be further done to prevent them from occurring.
Establishment of an ongoing training and evaluation programme, incorporating the
development of capabilities amongst employees about potential emergencies and ways and
means of identifying and averting the same. Most emergencies do not occur without some
incident or an abnormal situation. So there is always some time of few seconds to few
minutes to arrest an incident of abnormal situation from turning in to an emergency. This is
the role of the shift in-charge who is the incident controller (IC) along with his shift team.
Formation of Emergency Plan Objectives
Specific objectives of the Emergency Response Plan are to be clearly listed with regards to the
responses desired for successful management of the possible emergency situations. Suggested
Objectives could, initially include:





Formulation of suitable onsite / offsite fire release response
Formulation of suitable onsite / offsite explosion prevention and relief response.
Improved awareness of safety issues amongst site personnel.
Training of key persons in cardio-pulmonary resuscitation.
Village awareness programme
The objectives are suggested currently are generic in nature. However, they will evolve and become
more specific as the project develops further.
7.1.4
Implementation
Allocation of Resources
ONGC will require allocation of suitable resources for effective implementation of the DMP. Resources
include both human and financial resources.
Emergency Structure and Responsibility
The key personnel involved in the emergency response are





Employee detecting the incident (Observer)
Tool Pusher & ONGC Company Man / Drilling Engineer on the drilling rig
Location Incident management Team Members of onshore Installation per Station Bill.
Managing Director of ONGC
Onshore Emergency Response Team
Emergency site Coordinator & Incident Management Procedure
3.
ONGC Emergency Site Coordinator – Initial Actions
Following notification of an incident by the Incident Observer, the Emergency Site Coordinator shall: 



Confirm Contact Details.
Contact the affected location and verify incident.
Determine the category of the Incident.
Use the Initial Notification Checklist as a guide.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
212
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES

Log all information
4.
Individual Incident Management Team Members - Initial Actions: -


Proceed immediately to your normal office.
Arrange for incoming telephone calls to be screened and for calls pertaining to the Incident be
forwarded to the ONGC ECC.
Issue delegations of authority and/or arrange for work matters that may arise while you are
in the ONGC Emergency Control Centre to be dealt with.
Document any calls pertaining to the Incident that are made from your normal office or at
home and bring them to the ONGC Emergency Control Centre.
Retrieve any relevant data and take it to the ONGC ECC when it is operational. When advised,
go to the ONGC Emergency Control Centre. Advise the ONGC Chief Emergency Coordinator
that you have arrived.
Check the Status Boards for the most recent information.
Ensure that your telephone line is "live". Keep a record of incoming and outgoing telephone
calls, using a pre-formatted note pad.





If a material fact regarding the Incident comes to your attention, immediately advice the Board Writer
who will display the information onto the Status Board and ensure the events log is updated.
Composition of the ONGC Emergency Response Team
Individual and alternates have been nominated to form the core ONGC ERT as under.








Managing Director
Drilling Head/ Drilling Manager
Executive Director (Finance)
General Manager (P&D)
General Manager (HR & Admn.)
Sr. Manager (Material & Logistics)
Manager (QHSE)
IT In-charge
Job Descriptions of Emergency Response Team
1.
Managing Director – Chairmen ERT

Assume overall control and ensure that the Emergency Response Plan is activated and
implemented.
Chair and monitor the ERT review sessions.
Inform ONGC Group
Liaison with local, state and central government authorities and partners such as; DGH,
Partners, DGMS, etc. on HSE issues as appropriate.



[Managing Director of the company is also considered as ‘owner’ of the facility and responsible for all
legal actions against the company in case any breach of laws]
2.
Drilling Head/ Drilling Manager – Chief emergency Coordinator

The ONGC Chief Emergency Coordinator is responsible for the incident management support
both during and outside working hours. The ONGC Chief Emergency Coordinator shall: -
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
213
OIL AND NATURAL GAS CORPORATION
LIMITED










EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Notify the Managing Director of any incident and keep him informed.
Act as ‘Manager Emergency Response’ of the ONGC ERPT on behalf of the ONGC ERPT
Chairman.
Decide whether or not to mobilize the ONGC ERT
Initiate activation and call out of the ONGC ERPT.
Initiate activation of the ONGC Emergency Control Room (ECR).
Organize resources to support the emergency response to the incident.
Call a meeting with Emergency Response Team in Emergency Control Room to discuss the
incident and develop a response plan
Advice the Managing Director to notify appropriate external agencies, resource centers and
the local emergency services, if necessary. (Different persons in the emergency Response
Team should be assigned to call each of the external agencies)
Notify the Statutory agencies as required.
The chief emergency coordinator will act as chairman of Emergency Response Team(ERT) till
MD takes the charge of ERT chairman
3.
Executive Director Finance (F)- Finance and Insurance Coordinator


Provide personnel as required for special accounting purposes and maintain daily cost record
throughout the incident.
Set up separate account for qualifying the expenses related to all major incidents.
Provide experienced personnel from finance group to coordinate payment of emergency
purchases at ONGC shore base facilities.
Liaison with insurance company and with insurance representative
4.
General Manager (P &D) – Commercial Coordinator

Direct the commercial staff to initiate for emergency purchases.
5.
General Manager (HR Admin)



Inform employees and provide updates as deemed necessary in the event of any emergency.
Review and provide media responses to spokes person.
Reading for Press/Media briefing.
6.
Sr. Manager (Material & Logistics) – Mutual Aid/ Logistics Coordinator






Arrange for procurement of emergency supplies / contractors.
Provide purchasing and materials personnel.
Contract for temporary facilities and office as required.
Arrange for contract personnel, equipment and services to carry out operations.
Source and supply maps of affected area.
Arrange for recovery and disposal of damaged property, in case of oily debris co-ordinate with
the Safety/Environmental Manager as necessary.
7.
Manager QHSE, Head Office




Assume the role of secretary ERPT.
Provide assistance as required on issues related to Safety and Environment.
Assist in preparation of updates for spokesperson.
Coordinate documentation of safety and environmental aspects of incident.


KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
214
OIL AND NATURAL GAS CORPORATION
LIMITED


EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES




Coordinate surveillance and photo documentation.
Advise Managing Director / Drilling Operations Manager on restoration of any damaged
environment.
Assure that ONGC’s Health and Safety policies are observed.
Report any accidents, as required, to the appropriate Regulatory Agencies.
Provide support to plan procedures and follow-up investigations.
Coordinate with External agencies regarding oil spill response.
8.
IT In Charge

Ensure adequate communication means available and operational in ONGC at nearest ONGC
installation.
7.1.5
Setting up of Emergency Infrastructure
To enable the key persons to implement the DMP, the following infrastructure will require to be set
up:
Site Map with Escape Routes and Safe Assembly Points Marked on it


Site layouts have to be put up at key areas where assembly is to be done. These points could
vary depending upon the atmospheric stability and location and intensity of the emergency.
With the onset of emergency, all non-essential workers (those workers not assigned
emergency duty) shall evacuate the area and report to the specified emergency assembly
point.
Wind Sock

It is required to install wind sock at the top of any tall structure in the vicinity of the site. In
case there is a risk of the structure getting damaged during the emergency, it is desirable to
have alternate wind sock(s) as required. At least one wind sock should be visible from any
part of the site. Site personnel have to be trained in reading the atmospheric conditions on
the basis of the status of the wind sock.
Evacuation, Escape and Rescue (EER) Plan



In a major emergency, it will be necessary to evacuate personnel from affected areas and as
a precaution / measure to further evacuate non-essential workers from areas likely to be
affected should the emergency escalate. Whether evacuation is required or not can be
decided by the Incident Controller, and arrangements made to communicate with employees
in this regards. Arrangements could include announcements over the public address system,
or through other suitable means.
On evacuation, employees should be directed to pre-determined assembly points already
explained earlier. If they are required to be evacuated outside the site and at a remote place,
their transportation will be necessary for which vehicles will be required. At remote shelters
their care and welfare will also be through beforehand. Employees should use own vehicles
first and then use, if necessary, the mutual aid system or hired vehicles from elsewhere. The
vehicle may be needed to warn public also.
The safe passages/routes for escape shall be decided and marked by arrows in the plans as
explained in the details of Emergency Control Center in this chapter.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
215
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Safe Assembly Points
In affected and vulnerable locations, all non-essential workers (who are not assigned any emergency
duties) shall evacuate the area and report to a specified assembly point. The need to evacuate nonessential workers from non-affected areas will be determined by the foreseeable rate at which the
incident may escalate.
Each assembly point must be situated in a safe place, well away from areas of risk and least affected
by down wind direction. It may be in the open or in a building depending on hazard involved. More
than one assembly point is needed:


To ensure that employees do not have to approach the affected area to reach the assembly
point;
In case any assembly point lies in the path of wind-blown harmful materials, e.g. toxic gas,
burning brands, thrown (expected) materials and;
Before reaching an assembly point, or subsequently, if it is required to pass through an effected area
or the release of toxic substance, suitable personal protective equipment (PPE) including respirator,
helmets etc., should be available to the people.
Emergency Control Center
An Emergency Control Centre (ECC) is the primary area from where emergencies are handled. The
Main Control Centre, or any structure on the site, at sufficient distance from the affected area, and
that is designed to withstand overpressure and radiation stress should be designated as the ECC. An
ECC should contain various items as listed:
For communication:








Siren, or other suitable alarm system
Public address system
Intercom sets
External phone sets
Telephone directory
Company Telephone Directory
List of Important phone numbers required in emergency like Ambulance, Police etc.
Mobile phones
Document for ready reference:










Site Plan
Layout plan with hazard zones, assembly points marked and location of siren, safety/fire
system shown (Display)
Stock list of fire extinguishers
Fire-water system and additional sources of water
Emergency Response Plan
Copy of First Aid
MSDS of materials used in the plant
Mutual Aid Members,
List of employees their addresses and phone numbers.
Site plan
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
216
OIL AND NATURAL GAS CORPORATION
LIMITED


EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Layout plan
Emergency Organization.
Stationary



Note pads
Pens/pencils
Erasers
All equipment should be regularly inspected and tested for adequacy. Personnel should be trained in
the use of the same, where special training is required. Records of the same are to be maintained.
Fire Fighting
These include the following facilities:







Water, through water tankers from nearest installations or tube wells.
Dedicated, above ground fire water storage.
Additional underground water storage capacity to be made available in case of a fire.
Dedicated fire pumps and engines, to pump the water.
At every drilling rig at least two foam and two dry chemicals type fire extinguishers will be
located.
At every work over rig, at least one foam type and one dry chemical type fire extinguishers
will be provided.
Fixed-roof storage tanks shall be provided with fixed foam connections.
First Aid
Basic items in a first aid kit consist of following items:




















First aid leaflet, including CPR
Sterilized finger dressing
Sterilized hand or foot dressing
Sterilized body or large dressing
Sterilized burns dressing - small
Sterilized burns dressing - large
Sterilized burns dressing – extra large
Sterilized cotton wool (25 gms)
Cetavolon (28 gms)
Eye pads
Adhesive plaster
Assorted roller bandage
Triangular bandages
Safety pins
Scissors, ordinary, 12.7cms, both sides sharp
Savlon liquid, 150 ml, or equivalent
Cotton wool for padding, 100 gms
Eye Ointment of sulphacetamide preparation
Loose woven gauze (28”x8”), compressed pack
Scribbling Pad, 4”x 6” with a pencil in a plastic cover
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
217
OIL AND NATURAL GAS CORPORATION
LIMITED







7.1.6
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Adhesive dressing strips
Field dressing of modified army pattern
Record cards in a plastic cover
Torch, medium size with cells
Eye wash
Wooden splints, small
Wooden splints, big
Awareness, Training and Competence
Awareness
General awareness is to be invoked in all site personnel (including contractor’s employees) with
regards to the importance of safety in general and emergency procedures in particular. Awareness can
be generated in a number of ways, some of which are:





Awareness of Environment, Health and Safety Policies and the role of each employee in
achieving what are covered under the policies
Awareness of the importance of carrying out tasks as mentioned in the Standard Operating
Procedures and the potential impacts of not doing so
The importance of wearing personal protective equipment
Awareness with regards to relevant recommendations issued in this report in Chapter 10
Awareness about relevant portions of the safety instructions covered in equipment manuals
used at site
Training
Specific training requires to be given to key employees. Examples of such training include:





Testing of critical equipment and controls
Provision of Cardio-Pulmonary Resuscitation
Use of fire fighting equipment
Emergency Evacuation and Rescue (EER) procedures.
Training in use of communication procedures to be followed in case of emergencies.
Training needs identification exercises should be undertaken prior to commencement of operations
and the same must cover environment, health and safety issues.
Competence
Competence is a function of training, experience and education. Key persons involved in administering
the DMP should be competent. The level of competence can be decided for each key task and a
clearly defined competence chart should be prepared.
7.1.7
Communication
Communication is vital during emergencies. Under the Factories Act, as well as the MSIHC Rules,
communication is important and it is required to divulge the potential emergencies that could arise out
of the operations related to hazardous units.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
218
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
After undertaking an assessment of risks and their possible environmental impacts, and setting up an
organization for the preparedness to control the emergency, including related infrastructure, the next
step is operationalizing the communications system. Depending upon the severity of the event,
communications may have to be made with:





Persons inside the site premises
Key personnel outside the site premises during their non-working hours
Outside emergency services and authorities, and
Neighboring businesses, industries and general public.
Requirements pertaining to communication during emergencies are covered in this section.
Levels of Emergency





Three levels of emergencies are to be recognized:
First level: Confined to a particular unit of the entire site,
Second level: A spreading emergency, that requires outside help, and
Third level: A major emergency requiring neighboring population to be alerted.
Suitable alarms require to be made for each of these potential emergencies. The alarm should
be audible in every part of the site. In areas of high noise levels, an alternative to an audible
alarm, such as flashing lights may be installed.
Raising the First Level Emergency Alarm

Any person noticing an emergency should be able to raise or cause to be raised, the First
Level Emergency Alarm (FLEA). All employees must be trained to operate such emergency
alarms. There should be adequate places within the site, where provision to raise an alarm is
available. This could be an audible warning, individual signal or message to a manned
location. Major emergencies can be avoided by doing this.
Raising the Second and Third Level Emergency Alarms


In case there is a risk of the event spreading beyond the original unit and / or outside the site
premises, then a second level emergency alarm can be raised. This could be across the entire
site, as opposed to the first which could be at a part of the site.
In case a third level or (major) emergency is to be declared, telephonic information to
members of the local crisis group, or in case of failure of power and formal communication
systems, and non-availability of mobile phone signals, a big bell or a messenger can be
deployed.
Declaring a Major Emergency

Declaration of a major emergency should never be done on whims, immature judgment or
without proper thought. Further, because of the scale of activity that will commence due to
declaration of a major emergency, it is advisable to restrict the authority to declare it, and a
limited number of persons may be invested the authority to declare such an emergency,
although care should be taken to ensure that at least one such person is always at site.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
219
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Identifying the Type of Emergency through an Alarm
Alarm systems vary and will depend upon the size of individual sites. The person noticing the incident
should warn all those in the site vicinity to either evacuate or take other immediate action according to
a predetermined plan. Automatic alarms may be considered. Audible alarms include sirens or other
alarms over public address systems.
Alarms for a particular type of emergency (toxic leak or fire) can be raised separately enabling
different emergency plans to be put in motion. However, this must be done after giving due thought
about avoiding confusion in the minds of the site personnel. Use of alarms can be carried out to
communicate different information such as:









Declaration of a first level emergency by an alarm in a particular area
Declaration of an advanced emergency situation by sounding of an alarm in the entire site
Declaration of a major emergency by sounding of a hooter, alarm or by communication
through phone, bell or messenger.
Communication of Emergency
There should be an effective system to communicate emergency:
Inside the site i.e. to the workers including key personnel and essential workers on duty, and
inside normal working hours,
To the key personnel and essential workers not on duty and outside during normal working
hours
To outside emergency services and the government authorities, and
To the neighboring businesses, and public in general
Use of telephones and the role of the telephone operator
After hearing the emergency alarm and emergency declaration, or even while fast receiving the
emergency message on phone, a telephone operator (or communication officer) has to play an
important role. He should be precise, sharp, attentive and quick in receiving and noting the message
and then for immediate subsequent action of further communication.
Communication inside with Personnel inside the Site during the Incident
Relevant statutory information pertaining to the site must be made available beforehand, preferably in
the form of a booklet, to workers so that they can prepare themselves to prevent or control the
emergency.
In all cases, once the communication of emergency is done, through an alarm, all personnel should be
ready to undertake their roles in the same.
Communication with Personnel outside the Site during the Incident
Because of the suggested planning covered in report, key personnel will typically be available in all
shifts or on short call. But due to some reason, if some are outside or not on duty and if their help is
required, their updated details should be kept in the ECC for communication.
As far as possible, names should be listed in the order or priority. Communicators should be told to
call in the personnel in the order given, but not to waste time and call the next in line, returning to
those who could not be contacted later.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
220
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
On making contact, the communicator should give a short pre-arranged message to the effect that an
emergency has been declared at the site. While coming to the site, they should be instructed to carry
with them their identity cards in case they are stopped at road Fields.
Communication inside with External Emergency Services and Relevant Authorities
Communication with external agencies is important and essential, both to control the emergency and
as per regulatory compliance requirements. This is specially so for reportable (lost time) accidents. In
such cases, it is essential that the outside emergency services as well as relevant outside agencies be
informed in the shortest possible time. Liaison at the local level will help determine the best means for
achieving this.
Relevant agencies that provide emergency services include the fire brigade, nearby hospitals and
doctors, and the police, besides senior local and district administration personnel. Statutory
information, given to such agencies in advance will help them in arranging emergency services.
Communication with Neighboring Firms and the General Public


Telephone can be used for contact with industries in the study area with a view of receiving
mutual aid. However, the public in the area, in some circumstances, may require to be
informed about the emergency, which as stated earlier, should be done after careful
evaluation.
The public in the area, in some circumstances, may require to be informed about the
emergency, which as stated earlier, should be done after careful evaluation.
Communication with District Crisis Group and the Local Crisis Group

7.1.8
The general public communication will require being provided to the district administration
and this may be done by liasioning with different agencies.
Emergency Documentation and Document Control
Documentation
Emergency documentation consists of:


The Disaster Management Plan (this chapter) and its Annexures duly completed.
Related Formats and Records showing compliance with these documents.
The DMP needs to be approved by the Site in-charge prior to issue. All documents should be easily
accessible at individual sites.
Document Control





Documents should be legible.
All documents should be protected against damage, deterioration and loss.
Changes, if any, should also be approved by the Site in-charge.
Copies of the approved DMP are to be kept with the Site in-charge at the office in the
Emergency Control Centre, with the Site Main Controller.
Obsolete documents should be marked as such, and copies of such documents are to be
collected and prevented from being used.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
221
OIL AND NATURAL GAS CORPORATION
LIMITED
7.1.9
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Emergency Control
In case of emergencies, actions can broadly be categorized into the following activities:


Saving of human lives
Controlling the spread of the emergency and ultimately stopping it from further developing
On the basis of the issues covered in this chapter, the following are required to be incorporated into
the site’s DMP annexures:
Onsite Emergency Control












Shut down and Isolation: Raising the alarm, followed by immediate safe shut down and
isolation of affected areas.
Escape, Evacuation and Rescue: Safeguarding human lives at site by commencement of the
Emergency Evacuation and Rescue Plan. Ensuring that all personnel are accounted for and
carrying out a head count of persons evacuated. Notification and commencement of offsite
emergency plan in case offsite impacts are possible.
Stopping the development of the emergency: Control or response to the emergency
depending upon its nature (fire and explosion). Fire can be somewhat better controlled
through fire fighting, Impacts of explosions impacts can not be controlled once they occur,
hence efforts will require focusing on provision of relief or control of secondary impacts (such
as property damage or fires) resulting from explosions.
Treatment of injured: First aid and hospitalization of injured persons.
Protection of environment and property: During mitigation, efforts should be made to prevent
impacts on environment and property to the extent possible.
Welfare of the personnel managing the emergency: Changeover, first aid and refreshments
for the persons managing the emergency.
Informing and collaborating with statutory, mutual aid and other authorities including those
covered in the Local Crisis Group.
Informing and assisting relatives of the victims.
Informing the news and electronic media.
Preserving all evidences and records: This should be done to enable a through investigation
of the true causes of the emergency.
Investigation and follow up: This requires to be carried out to establish preventive measures
for the future and a review of the DMP & its annexures to fill up the deficiencies in the
emergency planning procedures.
Ensuring safety of personnel prior to restarting of operations: Efforts require to be made to
ensure that work environment is safe prior to restarting the work.
Off-site Emergency Response Plan
An emergency may affect areas offsite of the works as for example, an explosion can scatter debris
over wide areas and the effects of blast can cover considerable distances, wind can spread burning
brands of gases. In some cases e.g. as the result of an explosion, outside damage will be immediate
and part of the available resources of the Emergency Services may need to be deployed in the
affected areas. In any case, the possibility of further damage may remain, e.g. as the result of further
explosion or by the effect of wind spreading burning brands of hazardous material. Management will
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
222
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
usually need expert advice in drawing up plans so that if such a release occurs, they will be able to
collaborate with Emergency Services to estimate as far as practicable which downwind areas are at
risk. It may be necessary to prepare in advance simple charts or tables relating the likely spread of the
vapours cloud taking into account its expected buoyancy, the local topography and all possible
weather conditions during the time of release. Advice on all these matters can be obtained from the
Meteorological Office. Any such advice will include the recommendation that if a release occurs the
local Meteorological Office (whose address is in the telephone directory) should be contacted for
the current state of the weather over a somewhat wider area and, in the case of prolonged
emergencies, information on imminent changes in weather which may alter the areas at risk.
Such information is likely to be more specific if prior consultation has been made.
ONGC Obligations for Generating the Offsite Emergency Plan
Offsite emergency preparedness is covered in the Chemical Accidents (Emergency Planning,
Preparedness and Response) Rules, 1996.



The following are the responsibilities towards generation of the Offsite Emergency Plan:
To provide basic information on Risk and Environmental Impact Assessment to the
Local/District Authority, Police, Fire Brigade, Doctors, surrounding industries and the public
and to appraise them on the consequences and the protection/prevention measures
and control plans and seek their help to manage the emergency.
To assist the District Authorities in preparing the Off-site Emergency Plan.
An off-site emergency plan has essentially two parts:


Formation of the Local Crisis Group: This Group will be headed by the Deputy Collector or
the Magistrate of the Industrial area and will be responsible for the management of any
industrial emergency confined to the local area.
Formation of the District Crisis Group: This Group will be headed by the District Collector of
the District and will be responsible for any major Industrial emergency affecting Local and
beyond any industrial area of the District.
Since, the actual offsite plan requires the participation of outside agencies; this report does not dwell
further on the issue.
7.1.10 Checking and Corrective Actions
Monitoring and Measurement
Monitoring of the planned arrangements and the implementation of the DMP are essential to deliver
the required output and enhance emergency preparedness. This includes:




Provisions for NDT, FMECA and other tests to identify failure of critical equipment, before it
actually takes place.
Monitoring compliance to permits and statutory requirements laid down by regulatory
authorities.
Conducting mock drills (including fire drills) to check whether the planned arrangements are
working as per the required norms or not.
Testing of critical equipment, and
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
223
OIL AND NATURAL GAS CORPORATION
LIMITED

EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
Identifying minor leaks, accidents, near misses and others incidents that can lead to
emergencies.
A detailed monitoring checklist has to be prepared and the required actions carried out, prior to start
of work.
Records
Records are a means of evaluating performance. Records include (but are not limited to):



Regulatory records, such as permits and related documents
Monitoring and test records
Correspondence with relevant offsite and onsite agencies
Site management will ensure that records are properly maintained and available. It is desirable to
keep copies of all records at the site as well at the project sites, to prevent their loss. The retention
time for these records will depend upon their criticality and an ultimate decision will require to be
taken by Head Office in this regards. Legal records should be kept permanently.
DMP Audit, Non Conformance and Corrective Action and Preventive Action
Since this DMP has been designed as a dynamic document, it is required that its performance be
audited at regular intervals. Ideally, persons auditing the DMP should be external auditors (i.e. not
employed at the site being audited). The audit should result in a set of findings that are put before the
site management for review.
Audits will be periodic, at intervals that are decided by the Head Office. Audit reports shall state the
exact non-compliance with the particular clause of this DMP, and should include steps to be taken to
attain compliance, through corrective and preventive actions.
7.1.11 Review of emergency Performance
The site / head office management will review the findings of the audit and the non-compliances. It
will consider whether the DMP is providing adequate safety assurance to the management, delivering
performance as desired, and whether it continues to be in the spirit of Environment, Health and Safety
Policies, and changing requirements. On the basis of these, the management will record its decisions
and consider modifying the DMP, as deemed appropriate.
7.1.12 Annexure to DMP
The Annexures to the DMP are meant to be a ready reference flip chart that is site specific. It contains
forms that require to be filled up prior to commencement of actual field work. Guidelines provided in
the DMP covered in Chapter7, may be taken into account prior to filling up of the DMP annexures.
7.1.13 Content of Annexure
The contents of the DMP Annexures are listed. The annexures should first be completed in respect of
the names, addresses and contact phone numbers of all the members of the emergency organization.
In addition, the names, addresses and phones numbers of nearest police station, local authorities,
media, doctors, hospitals, fire brigade, voluntary organizations, and home guards also require to be
collected. Once this, (and other) updating of DMP has been done for the site, the same may be got
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
224
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ADDITIONAL STUDIES
printed and kept with each officer, work sites and security, and other relevant persons as may be
needed. The items covered in the annexures are:




















Emergency organization
Siren code
Site map with escape routes and safe assembly points
Emergency control centers
Role of site main controller
Role of incident controller
Role of fire safety service
Medical services
Engineering services
Welfare services
Security services
Replenishment services
Mutual aid
Internal emergency reporting and communication system
Safe assembly points
Evacuation, escape and rescue (EER) plan
MCLS
Mutual aid organizations
Mock drill and review procedure
Offline Plan Components
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
225
OIL AND NATURAL GAS CORPORATION
LIMITED
8
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
PROJECT BENEFITS
PROJECT BENEFITS
The project benefits are summarized as follows:
Employment Opportunity
The drilling process will involve a number of skilled and unskilled workers. There is possibility that local
people will be engaged for the purpose and hence improve the existing employment scenario of the
region. The drill site construction would be done largely by employing local labour.
Benefits for the Country


The demand for petroleum has recorded a considerable increase over the year from 30 million
tonnes in 1980-81 to about 115 million tonnes at present. This growing demand poses a big
challenge to oil producing company including ONGC. Also new oil/gas finds in the Block will
lead to reduction in India’s dependence on imported crude oil and thereby results in
considerable saving in foreign exchange.
There will be a beneficial effect of a flourishing production unit that will directly and indirectly
boost the living standards of the people, save foreign exchange and with increase in industrial
activities, create more jobs in the local economy.
Benefits to the Region


In the event that commercial quantities of hydrocarbon reserves are discovered, more longterm employment opportunities would be created. Besides, the hydrocarbons brought to the
surface shall help in contributing the ongoing efforts of the government to meet the national
demand of petroleum resources.
Development of ancillary activities resulting into indirect jobs and requirement of more skills.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
226
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
9
ENVIRONMENTAL MANAGEMENT AND MONITORING
PLAN
9.1
Introduction
Chapter 5 has identified a number of impacts that are likely to arise during land acquisition /
permitting, operations of equipment and abandonment of operations. The EIA has also examined
biophysical and socio-economic effects of the proposed program.
Where adverse impacts have been identified, the EIA has examined the extent to which these impacts
would be mitigated through the adoption of industry standard practice and guidelines and following
legislative requirements of the MoEF and Gujarat Pollution Control Board. The Environmental
Management Plan (EMP) describes both generic good practice measures and site specific measures,
the implementation of which is aimed at mitigating potential impacts associated with the proposed
activities.
9.1.1
Purpose of the Environmental Management Plan
The EMP provides a delivery mechanism to address potential adverse impacts, to instruct contractors
and to introduce standards of good practice to be adopted for all project works. For each stage of the
programme, the EMP lists all the requirements to ensure effective mitigation of every potential
biophysical and socio-economic impact identified in the EIA. For each activity or operation, which
could otherwise give rise to impact, the following information is presented.




9.1.2
A comprehensive listing of the mitigation otherwise give rise to impact, the following
information is presented: measures (actions) that ONGC will implement;
The parameters that will be monitored to ensure effective implementation of the action;
The timing for implementation of the action to ensure that the objectives of mitigation are
fully met.
ONGC is committed to the adoption of these measures and will carry out ongoing inspection
to ensure their implementation and effectiveness by its contractors
Role of ONGC and its Contractor
Role of ONGC
As project proponents, ONGC will have ultimate responsibility for implementing the provisions of the
EMP. This role will include the ongoing management of environmental impacts, monitoring of
contractor performance as well as development of mechanisms for dealing with environmental
problems.
ONGC will also ensure that the activities of its contractors are conducted in accordance with ‘good
practice’ measures, implementation of which will be required through contractual documentation. In
order to facilitate this, and to demonstrate commitment to the EMP, ONGC /Contractor management
will conduct regular internal site inspections, the results of which will be documented.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
227
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Role of ONGC’s Contractor
ONGC’s management will be responsible for performance of all it's contractors and ensuring that all
ONGC's commitments in the EIA are translated into contractors' requirements and that these
requirements are implemented to the full intent and extent of ONGC’s original commitment.
ONGC’s contractors will be responsible for implementation of, or adherence, to all the mitigation
measures outlined in the EIA. All contractors will be required to comply with the provisions of the EMP
and with any environmental and other codes of conduct required by ONGC. ONGC will require all
contractors to introduce regular environmental inspection and reporting to enable ONGC to monitor
their performance.
ONGC's contractors and sub-contractors will be required to adopt the provisions of the EMP as if it
were their own.
9.1.3
Post project Environmental Monitoring Plan
The following shall be monitored on a regular basis throughout the life of the project to ensure a high
level of environmental performance being maintained:







Characteristics of waste water generated at drilling site.
Sanitation facilities at camp-sites proposed to be constructed.
Materials used in drilling/work over fluid make up.
Fluid losses.
Monitoring of Ambient Air parameter will be done as per the requirement of the MoEF/SPCB.
Flue gas Analysis
Drill cutting Analysis
The general effectiveness of pollution control measures shall also be monitored.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
228
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Table 9-1: Environmental Management Plan
S. No.
Potential Impact
1.
Land Acquisition
2.
Site Degradation
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Action
Parameters for Monitoring



Ensure that all necessary protocols are
followed and legal requirements
implemented.

Ensure that appropriate legal requirements
have been met with regard to land
occupancy, land ownership or usage rights,
notice & compensation etc.

Establish and clearly document land usage
permission agreements with owners, users
and state authorities.

Mark out site boundaries. Ensure that land
take during drilling site construction is
restricted to pre-agreed area.

A site restoration plan needs to be
formulated, known to all stakeholders and
strictly implemented


A suitable waste water disposal plan to be in
place to ensure that well fluids do not
overflow and damage surrounding farm
lands.

Timing

Pre-deployment of
topographic
survey team or
site clearance
crew.

After selection of
precise site
location &
orientation. Prior
to onset of site
clearance.
Approvals from
land owners of
suitable site
restoration on
return of land

At time of
decommissioning
of well site
A working drainage
scheme that
ensures that any
pit does not
overflow and that
well fluids are
secured from
leaving the well
premises

Throughout the
project life, in
particular during
the monsoons
Legal documents
Lease documents
229
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S. No.
Potential Impact
3.
Soil erosion
4.
Habitat disturbance
Action
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Parameters for Monitoring
Minimize area extent of site clearance, by
staying within the defined boundaries.

Site boundaries
not extended /
breached.

Prior to onset of
site clearance.

Protect topsoil stockpile where possible.

Effective cover in
place.

Duration of data
acquisition until
demobilization.

Clear boundaries
marks in place.

Prior to
commencement of
site clearance.

Mark out path / trail boundaries.

For cleared area, retain topsoil in stockpile
where possible on perimeter of site for
subsequent re-spreading onsite during
restoration.

Topsoil stockpile in
place on site edge.

Duration of
programme until
demobilization.

All operators involved in site preparation shall
be trained to observe the defined site
boundaries.

Maintenance of
integrity of
boundary markers.

Duration of site
preparation.
Evidence of
impended
drainage, culvert
Blockage or
collapse.
Up-to-date
inventory in place.

Duration of
programme.

Duration of
programme

Duration of
programme
5.
Drainage and Effluent

Ensure drainage system and specific design
measures are working effectively.

6.
Fuels, Lubricants & Chemicals
Management

Maintain strict inventory of all fuels, lubricants
and chemicals brought to the site.


All fuels, lubricants & chemicals placed in
controlled storage in proper container.

Integrity of
storage area:
impervious liner;
surfacing.

All drums and
containers located
within footprint of
storage area.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Timing

230
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S. No.
Potential Impact
Action
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Parameters for Monitoring

All used & unused lubricants and chemicals
no longer required, to be transported offsite.


Refueling operations to be undertaken over
area with impervious flooring and surface
drainage with oil interceptor.


Delivery of fuel to storage to be supervised.

Timing
Low inventory (or
absence) of used /
unused lubricants
no longer required
onsite.
Facilities installed

Duration of
programme

Duration of
programme

Detailed procedure
in place.

Duration of
programme.
Adequate spills containment and clean-up
equipment and materials on-hand and
available to contain foreseeable spill.

Make available at a
short notice.

7.
Waste Management

Implement site waste management plan
(section 5.4) which identifies and
characterizes every waste arising associated
with operation, which identifies the
procedures for collection, handling & disposal
of each waste arising.

Comprehensive
Waste
Management Plan
in place and
available for
inspection on-site.

Prior to site
clearance.
8.
Site Contamination

Impervious liners (e.g.; clay, concrete) in
place for fuel, lubricants storage area.

Evidence of
protective
measures in place;
No visual sign of
spills.

Daily throughout
the duration of
programme.

Effective bunds capable of containing 110%
of the volume of the largest container within
and enclosing all potentially contaminating
materials. To be used for fuel lubricants and
chemicals storage area.

Evidence of
protective
measures in place;
absence of visual
sign of spills.

Daily throughout
duration of
programme.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
231
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S. No.
Potential Impact
Action
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Parameters for Monitoring
Timing

Non-contaminated and potentially
contaminated run-off shall be kept separate.
Non-contaminated run-off shall be routed to
off-site area via silt traps. Potentially
contaminated surface run-off shall be treated.

Evidence of
separate routes
and effectively
working silt traps.

Duration of
programme.

Oil drip pans shall be used wherever there is
significant potential for leakage including, but
not limited to:
Drill rig engine.
Electric Generator.
Pumps or other motors.
Maintenance area.
Fuel transfer areas.


Drip pans in place.
Absence of visible
signs of soil
Contamination

Duration of
programme

All spills / leaks contained, reported and
cleaned up immediately.


Duration of
programme.

Spill absorbent containment material
deployed to contain large spills.
Written spill
control procedure
in place during the
duration of
programme.

Contaminated soil dug up, placed in drums &
subsequently removed from site.





9.
Water Quality and other aquatic
impacts

No discharge to be made to watercourse.

No discharge
hoses in vicinity of
watercourses.

Duration of
programme with
particular
emphasis during
operation camp
layout design and
site preparation.
10.
Noise and Vibration (applies to
operation of equipment)

List of all machinery onsite identifying age of
equipment.

List of age of all
equipment
deployed under
contract.

Prior to
commencement of
work by
contractors at
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
232
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
S. No.
Potential Impact
Action

11.
12.
Air Emissions
Non-routine events and
accidental releases.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Equipment maintained in good working order.
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Parameters for Monitoring

Written record of
maintenance for all
equipment.

Implement good working practices to
minimize noise.

Timing and
synchronization of
operations with
local activities.

Acoustic mufflers in large engines (where
practicable)

Mufflers in place.

All equipment operated within specified
design parameters. (Operational phase)

N/A

Any dry, dusty materials (chemicals, etc.)
shall be stored in sealed containers.

Absence of
stockpiles or open
containers of dusty
materials.

An Oil Spill Contingency Plan and Emergency
Response Plan shall be drawn up.

The provisions of
the Oil Spill
Contingency Plan
shall be monitored.
Timing
each survey site.


Duration of
programme.

Duration of
programme.

Update Emergency
Plan as required;
maintain state of
readiness for
response including
plan awareness
and training.
233
OIL AND NATURAL GAS CORPORATION
LIMITED
9.2
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Waste Management Plan
The WMP (Waste Management Plan) covers disposal of all wastes on the operating site itself, with
further reference to off-site disposal of those wastes which cannot be dealt with on-site.
9.2.1
Objectives
The objectives of the WMP are:
To provide the operating crew with the necessary guidance for the reduction and appropriate
management of wastes generated during drilling.


9.2.2
To comply with all current environmental regulations.
To meet industry standards on waste management and control.
Classification of Waste
In general, wastes can be categorized as follows.







9.2.3
Non-Hazardous Solid Waste: for example lines, cables, plastic, domestic waste, containers
etc.
Hazardous Liquid Wastes -any liquid wastes, vehicle maintenance wastes or receptacles
containing or previously containing hazardous wastes or hazardous raw materials. Hazardous
by definition is a chemical identified in its Material Safety Data Sheet (MSDS) as being harmful
to humans, animals, or the surrounding environment. This also includes volumes of paints,
solvents, lubricating oil etc.
Hazardous Solid Wastes - Containers holding or previously holding volumes of hazardous
chemicals, batteries, etc. Wastes are designated as hazardous if their MSDS indicates they are
harmful to humans and/or the environment. Additionally, used medical wastes (bandages,
syringes, etc) are classified as hazardous.
Contaminated Soils - Soils contaminated by any substance defined as hazardous are
themselves designated as 'Hazardous'.
Hydrocarbon Wastes - waste oils e.g. from oil changes or leakage from equipment. Used oil
(from engine oil changes) is designated as hazardous.
Once a waste item is identified and classified, it will be disposed off in an approved manner.
Care will be taken to ensure that the waste is properly categorized to ensure that the
appropriate disposal method is selected.
Drill cutting and Spent Mud.
Disposal Options
The following disposal options will be available on site.


Domestic waste generated at site will be segregated at source and will be disposed as per
Municipal Solid Waste Management Rule (2000).
Offsite Disposal – Drill cutting if found hazardous wastes shall be handed over to authorized
TSDF facility for further disposal.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
234
OIL AND NATURAL GAS CORPORATION
LIMITED
9.2.4
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Labeling of Waste
Any wastes, which cannot be dealt with on site, will be removed to a suitable location for further
handling and/or disposal. These wastes will be clearly labeled according to:


9.2.5
Hazardous and Bio Medical Waste
Non Hazardous or Domestic Waste.
Waste Reduction
Waste reduction efforts will concentrate on reuse, recycling, minimization of packaging material,
reduction in size of waste material, and finally reduction of time spent on location via optimization of
survey operations. Water based will be reused to the extent possible.
Minimization of waste material centre around reducing packaging materials. Use of large packaging, in
bulk (for example 1 to 1.5 tonne recyclable bags as opposed to 100 lb sacks) should be preferred.
9.2.6
Special Concern
Plastic containers are prime targets for use as water containers. As some of these may contain
substances, which can be harmful to humans, care will be taken to ensure that they are removed from
the site intact. In general, after emptying chemical containers, which did not contain hazardous
substances, the container will be sent to authorize recycler.
Used medical wastes inclusive of, but not limited to bandage material, syringes, etc, will be collected
in a special collection drum to minimize manual handling. Contents of the drum will be labeled as
hazardous medical waste and sent offsite for disposal as per BIO – Medical Waste Management Rules.
9.3
Site Restoration Plan









Before starting up drilling activity, contour survey of site, listing of flora present at site and
Photographs of site will be obtained and record will be maintained.
Soil excavated during drill site preparation will be stacked separately for future use i.e. for
restoration of site.
After completion of Drilling in case of discovery of non commercial quantity of hydrocarbon
restoration work begin with withdrawal of all equipment/machinery.
All concrete or steel installations would be removed, so as to ensure that there are no
protruding surface structures
Any soil contaminated by operations will be remedied as necessary. The type, location and
extent of contamination and remediation / restoration will be documented and maintained in
the well records.
Ditches, dikes and containment walls will be leveled.
Top- soil, whether stock piled at the site or hauled to the location, will be spread as part of
the final contouring. A productive top soil is necessary for replanting.
Reseeding and replanting of the location will be done with plants and grasses native to the
area.
Upon completion of the location restoration, a program of soil sampling /visual inspection and
record keeping will be established.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
235
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED



9.4
9.4.1
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
In case of a dry well, proper abandonment practices will be followed and a record will be
maintained.
Photographs of restored site will be taken and records will be kept
Confirmation from concerned farmers that site is restored satisfactorily will be obtained and
record will be maintained.
Ecology Management
Restoration of Site (Post project plantation with in 110 m2)14
Vegetation within area of 110 m2 will be cleared to carryout various project related activities which will
lead in the habitat degradation. This area (110 m2) is considered as an impact zone and will need to
reclaim or restore (plantation) to mitigate various impacts on the biodiversity and ecological conditions
of the surrounding environ. Plant species suggested for plantation is given in Table 9-2.
9.4.2
Plantation outside Impact Zone (Post project plantation within 1 km.)
Apart from project site (impact zone) additional surrounding area up to 1 km of this impact zone will
also considered for plantation to improve habitat status of the project area. Surrounding areas within 1
km distance will be planted. Plant species suggested for plantation is given in Table 9-2.
Table 9-2: Suggested Plantation and Budgetary Allocation
S. No
Scientific Name and Common
Name
No. of Saplings to be
Planted
Estimated Cost
Restoration of Impact Zone (Post project plantation with in 110 m2): approximate cost of each sapling is Rs. 50/1
Aerva tomentosa (Kapok bush)
12
650
2
Capparis sepiaria (Kanthar)
12
650
3
Crotalaria burhia ( sinia)
12
650
Plantation Outside Impact Zone (Post project plantation within 1 km.): approximate cost of each sapling is Rs.
50/-)
Azadirachta indica (Neem)
100
5000
Derris indica (Karanj)
100
5000
Salvadora oleoides/Persica (Pilu)
100
5000
Total Budget for One Well
16,950
For 22 Wells 16,950 x22 = 3,72,900
Total Budget for 22 Well Locations is Three Lakhs Seventy Two Thousand and Nine Hundred15
1
14
In Case of Non Agriculture land only
15 All other expenditures as labor charges, watering, fertilizers etc will be borne by client / proponent
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
236
OIL AND NATURAL GAS CORPORATION
LIMITED
9.4.3
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Plantation and Monitoring
Entire plantation activities will completed within six months after decommissioning moreover post
plantation care will be taken by client / proponent up to one year.
Plantation Technique
Since the project area fall under arid condition and having poor soil quality, plantation of tree species
required approx. 1m3 pit for soil enrichment
Pit should be filled with imported soil with 3:1:1 the ratio of sand, silt and form yard manure
Procure well grown saplings of recommended species from the nearby Forest Department nursery
Make 1m diameter ring bund around the planted saplings for water retention
Watering of sapling is species specific, therefore watering need to be done once in day
Monitoring Protocol
The plantations need to be managed by regular watering, soil enrichment work, applying manure,
weeding and provide proper protection.
Replacement of sapling (replanting) required whenever mortality occurs in the plantation during the
growth stage.
Any damage to the developed greenbelt due to any natural or cattle activity should be redeveloped
and maintained by the proponent / client.
9.4.4
Conservation of wildlife Species
Above described plantation activities will help to improve the habitat status of the project area and will
ultimately help to conserve wildlife of the project area.
9.5
Social Management Plan
If the hydrocarbon reserves are discovered, the project proponent will carry out several welfare
activites as a part of CSR to improve the socio-economic condition of the surrounding area. These
activities will include:
1.
2.
3.
4.
The project proponent will provide Vocational Courses in the schools for the benefit of the
local people.
The project proponent will provide medical facilities for the localites in the surrounding
villages
The project proponent will develop the nearby areas when if the wells become operational.
The project proponent will take up initiatives for physically and mentally challenged people by
empowering them for self employment.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
237
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Table 9-3: List of Stake holder meeting (Community Consultation)
Name of
Participant
Designation
Village/Place
Date
Issues Discussed
Mr. Shankar
Bhai Hira Bhai
Prajapati
Sarpanch
Charda Group
Gram
Panchayat
08/01/2015




RCC road in the village 500 meters.
Construction of gutter line in village.
Concrete drainage line for pond.
Community sanitary toilet is absent in
the village.
Mr. Pravin D
Joshi
Principal
Tirthgam
Shri Tirthgam
Prathamik
Shala
08/01/2015



Street light is absent in the village.
Village road is not in good condition.
Construction of gutterline in the
village.
Mr. Ashok
Kumar Vala Bhai
Nai
Teacher
Rampura
Pay Kendra
Prathamik
Shala
07/01/2015

Sanitary household toilets are absent
in the village.
ST bus visits the village once a day
that is not sufficient for the villagers.
Health facilities are at a minimum
distance of 25 kilometers from the
village.


Mr. Karsan Bhai
Sarpanch
Golvo & Golvi
07/01/2015

Sarpanch denied to give any village
data or suggestions regarding
requirements in the village.
Mr.Waghela
Mafat Sinh
Vasanji
Sarpanch
Paldi (Methi)
07/01/2015

The absence of toilets in 40% of the
households.
Solar light installation is required in
the village.
Mr. Hadiyol
Harshad
Panchayat
Staff
Dhendhu
07/01/2015

Renovation of the Panchayat building
as it is old.
Mrs. Krishna
Ben Patel
Teacher
Nardipur
Prathamik
Kanya Shala
07/01/2015


Lack of potable water in school.
The height of the boundary wall is low
of Nardipur Prathamik Kanya Shala.

KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Measures Proposed
The project proponent shall put every effort to
improve the Quality of life of the people of
surrounding Villages through the Community
Development Programme/CSR in phase wise
manner. These activities shall be conducted after
having need based assessment survey of the area
and in consultation with the DDO/TDO/Panchayat
office bearer.
238
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Name of
Participant
Designation
Village/Place
Date
Mr. G. Prajapati
Principal
Sardarpura
Seth K. G.
Vidyamandir
Middle & High
School
07/01/2015
Ravel
Gram
Panchayat
07/01/2015
Mr. Babba Bhai
Yama Bhai
Thakur
Sarpanch
Issues Discussed







Mr. S. J.
Prajapati
Principal
Dodgam
Pagar Kendra
Shala
08/01/2015










KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Measures Proposed
Construction of class rooms.
Computer for students in school.
Sports equipments for school
students.
Boundary wall of the school.
Solar Street light in village.
Sanitary toilet for households in
villages.
Construction of gutter line in the
village.
Construction of gutterline in village.
Construction of crematorium shade.
Solar Street light in village.
Store room at crematorium for
keeping burning sticks.
Toilet construction in the school.
Water tank with RO facility in the
school.
Sports equipments for students in
school.
Construction of classrooms.
Renovation of village road.
Computer for the school students.
239
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Table 9-4: Social Management Plan
Objective
To improve the Socio-economic condition of the area
Concern
Proper Compensation to the farmers/land owners and crops damaged during drilling activities
Benefit of EMP
Improvement in the direct and indirect employment opportunities and business development
Impacting
Activities
Select land for well site
minimum 500 m away
from habitation and
water resources,
religious places to
avoid any conflict with
the villagers.
Land lease or
purchase
Implementation and Management
Mitigation Measures
and Rationale
Location
Drill Site
Timing
Records
Remarks
Manager
(Drilling) ONGC
VP (Drilling)
ONGC
Log Book
-
Liaison officer
(LAQ) - ONGC
VP (Drilling)
ONGC
Log Book
-
Drilling Manager
ONGC
VP (Drilling)
ONGC
Log Book
-
Liaison officer
(LAQ) - ONGC
VP (Drilling)
ONGC
Log Book
-
At all drill site
Prior to drilling
Provision of adequate
cross drainage will be
provided for roads
leading to drilling site.
At Drill site
wherever
required
At the initial
Proposed
leased/purchased
land
Monitoring
During project
planning
Ensure that
appropriate legal
requirement have been
met with regard to
land occupancy, usage
rights, notice and
compensation etc.
Adequate dialogue
with the local
population and the
authority while
designing
compensation
Responsibility
stage of well site
planning
Prior to drilling
packages, close
monitoring on the type
of land loss i.e.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
240
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Objective
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
To improve the Socio-economic condition of the area
Concern
Proper Compensation to the farmers/land owners and crops damaged during drilling activities
Benefit of EMP
Improvement in the direct and indirect employment opportunities and business development
Impacting
Activities
Implementation and Management
Mitigation Measures
and Rationale
Location
Timing
Responsibility
Monitoring
Remarks
Records
Permanent or
Temporary
Clearance of
Vegetation at site
and site
preparation
Loss of land and crop
loss to be
compensated
At all sites where
losses of crops
and land is
applicable
Provide temporary
employment
generation
opportunities to land
losers/ land workers
At the sites
where drilling
activities will be
conducted
All excavation activities
equipment required for
the site preparation
shall be hired from the
local area.
a)
Potential
damage for
crops
due to flaring/
spills etc.
b)
Flaring
operations
will be
controlled to
minimize any
agricultural
loss due to
heat.
Weekly
Liaison officer
(LAQ) - ONGC
During Drilling
and post drilling
operation
-
All through
Biannually
VP (HR)-ONGC
drilling and post
drilling
Log Book
-
Log Book
-
Log Book
-
operation
All sites through
At all sites
drilling and post
drilling
ONGC
Contractor
VP (Drilling)
Liaison officer
(LAQ) - ONGC
VP (Operation)
ONGC
ONGC
operation
At the Damaged
Site
Immediate (As
soon as the
incident is
reported)
In case any
complaint is
received,
ONGC is to
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
241
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
Objective
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
To improve the Socio-economic condition of the area
Concern
Proper Compensation to the farmers/land owners and crops damaged during drilling activities
Benefit of EMP
Improvement in the direct and indirect employment opportunities and business development
Impacting
Activities
Implementation and Management
Mitigation Measures
and Rationale
Location
Timing
Responsibility
Monitoring
Remarks
Records
provide
adequate
compensation
for loss of
crop after
proper
interaction
with the local
people.
Land for access
roads and
Pipelines
Employment
Opportunities.
Socio-economic
Development
Minimize the width of a
pipeline right-of-way or
access road during
construction and
operations as far as
possible.
Proposed Site of
Drilling/Operation
Provide employment
for local community
wherever possible.
At the different
location where
skilled/unskilled
manpower are
required
Provision of health
services and
improvement in the
education
infrastructure
In the
surrounding
areas where
drilling wells are
developed
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Initial Phase
Manager
(Drilling) ONGC
VP (Operation)
ONGC
Regular basis
GM (HR)
VP (HR)
ONGC
Regular basis (if
hydrocarbon
reserves are found)
CSR- ONGC
ONGC
GM (HR)
ONGC
Log Book
Regular Check is
to be carried out
Employment Register
-
Auditable CSR
Records/Files
Auditable
document as per
Companies Act
2013
242
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
CSR Activities
The CSR activity has been earmarked 2% of the project cost (INR 350 Crores) of the drilling of wells.
The amount earmarked for CSR is Rs. 7.00 crores that has been divided accordingly for five years
amongst the various CSR activities across Banaskantha, Gandhinagar and Ahmedabad districts. The
budget allocation for five years has been shown in the Table 9.5
Table 9-5: CSR Budget for Fie years in Indian Ruppees
Focus Area
Education
2015-16
11,76,000
2016-17
14,70,000
2017-18
2018-19
19,60,000
24,50,000
2019-20
27,44,000
Total
98,00,000
Health Care
12,60,000
15,75,000
21.00,000
26,25,000
29,40,000
1,05,00,000
Community
Development
21,00,000
26,25,000
35,00,000
43,75,000
49,00,000
1,75,00,000
Infrastructure
Development
16,80,000
21,00,000
28,00,000
35,00,000
39,20,000
1,40,00,000
Promoting
sports/ Art and
Culture
2,52,000
3,15,000
4,20,000
52,50,000
5,88,000
21,00,000
Enterpreneurship
Scheme
6,72,000
8,40,000
11,20,000
14,00,000
15,68,000
56,00,000
Women’s
Empowerment,
girl child
development
1,68,000
2,10,000
2,80,000
3,50,000
3,92,000
1,4,00,000
For Physically
and mentally
challenged
group
5,88,000
7,35,000
9,80,000
12,25,000
13,72,000
49,00,000
Protecton of
heritage site
5,04,000
6,30,000
8,40,000
10,50,000
11,76,000
42,00,000
Grand Total
8400000
10500000
14000000
17500000
19600000
70000000
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
243
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Figure 9-1: Medical Camps organized by ONGC
9.6
Occupational Health Surveillance Programme
ONGC onshore operations are comes under Mine Act (Ministry of Labour) and as per Mines
Act every person employed in mine should go under PME (Periodical Medical Examination) by
approved medical doctor / Hospital at fixed interval. i.e.



Up to 45 yrs - Once in a 05 Yrs
45 to 55 yrs - 03 yrs &
> 55 yrs
- 01 yr
As per plan 10 % employees are being medically examined every year and records is being
kept for future reference and track.
There are ONGC Panel hospitals / Laboratories / Doctors with necessary medical facilities for
PME like X-Rays, ECG, Sonography, PFT, Audiometery, Eye / ENT Surgeon / Blood / urine test etc.
Ambulance is available 24 hrs.
All the work centers have First Aid Box, Stretcher and 24 Hrs. Emergency vehicles.
The main occupational health hazards may be noise at Mechanical Rigs / Compressors plants,
Hydrogen Sulphide gas in EOR affected area for this breathing apparatus are provided and necessary
guidelines are available at sites.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
244
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Free medical camps (medical check up / eye check up) are also organized by ONGC in villages around
the operational area, and accordingly patients are treated and free medicines are given. If required
free operations are also done by ONGC.
9.6.1
Health Hazard Identification
The health and Hygiene coordinator (Medical Officer), with a team of Drilling Rig personnel will
identity and evaluate occupational health and industrial hygiene hazards that exists during drilling
operations through a structured approach via systematic inspections. The structured approach can
include:















9.6.2
Review of work activities for all occupations.
Review of task analysis and technical surveys.
Review of hazards identified in planned inspections and reported hazards.
Applicable regulations, legislation, codes and standards.
Interviews with employees and managers.
The surveys particularly address the identification and evaluation of the following occupational
health and hygiene hazards:
Chemical Hazards
Noise Hazards
Radiation Hazards
Illumination Hazards
Vibration Hazards
Temperature Extremes
Biological Hazards
Ergonomic Hazards
Stress related Hazards
Health Hazard Control
The Area manager will constitute a team of officers and staff supported by medical officer, which will:



Prioritize the hazards based on their risk potential.
Identify specific work groups affected by each hazard.
Determine the controls required to manage these identified hazards. The cost of each
identified control versus benefits of its implementation may be evaluated.
Develop an action plan identifying:




9.6.3
Work to be done
Person responsible to complete the work
Target dates of completion
Develop a follow up system to ensure the action plan is accomplished.
Health Care
The health and hygiene of the personnel working at the Drilling Rig will be monitored through periodic
health checks of the persons. All employees will undergo a periodic medical examination once in two
years. This medical examination focuses on individual medical surveillance of all types of health
hazards covering both occupational and non-occupational issues.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
245
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
The record of the health check up will be maintained centrally off site in confidential file by the
medical section. The medical officer at base recommends appropriate treatment for the persons found
to be having any health problems requiring attention.
A general analysis of the health records of the employees will also be carried out once in a year by the
medical section to identify any trends in health problems related to the occupation and remedial
actions as deemed necessary are taken up.
Majority of the employees will be trained in first aid.
9.6.4
Responsibility
Medical officer appointed for the health check up of Drilling team members will be adequately qualified
and trained. He will have thorough understanding of company’s operations and the associated
potential health and hygiene problems. He will be familiar with appropriate methods to identify,
evaluate and control health hazards. The medical officer, under the guidance of seismic survey In
charge, should be primarily responsible for all health and hygiene control programme.
Table 9-6: Summary of Proposed health Surveillance Programme
Cause of health hazard and
scope
Risk
Noise (Generators, Cranes,Fire,
Water Pump, Hot oil pumps,Crude
dispatch pumps)
Hearing loss
Handling of heavy equipment and
material (Manual handling of
material)
Back problem
Handling of chemicals (Chemical,
stores, Chemical dosing areas,
Chemical labs)
Eyes and chemical ingestion,
Dermal effect of chemicals
9.7
Recommendations
Program of noise survey, Training
to the concerned personnel and
written operational guidelines
Blow Out Prevention and Oil Spill Contingency Plan
9.7.1
Blow Out
A blowout is defined as an uncontrolled flow of gas, oil or other well fluids into the atmosphere. A
blow-out situation will not only affect the facility but surrounding area also. In a blowout emergency
the primary objective is the safeguarding of human life. Secondary objectives are minimizing damage
to the environment, assets and protection of company reputation.
The Local Emergency Coordination Team (LECC) has responsibility for the emergency in conjunction
with the On Scene Commander until the safety and proper treatment of all personnel at the location
has been ensured and escalation has stopped.
Once the objectives of safeguarding life in complete, and escalation has stopped, the blowout moves
into recovery phase.
Initial Action

Raise the alarm, inform emergency control coordinator and mobilize emergency control team.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
246
OIL AND NATURAL GAS CORPORATION
LIMITED




EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
In a situation where there is a potential for release of significant amounts of well fluid it is
recommended that all personnel be evacuated to a safe distance until the situation has been
evaluated and/ or stabilized. All personnel at the rig should evacuate immediately and
proceed to the assembly point.
Render First Aid to All Injured Personnel. First Aid may range from minor scrapes to broken
limbs, burns, respiratory problems and major trauma.
All personnel who receive injuries related to the well control event should be transported
immediately to the nearest hospital. Critically injured personnel should be transported by the
fastest means available.
Ensure all site personnel are counted for. In the event of a well control emergency, all
personnel should muster as per established procedures.
Control Ignition Sources
All fired (or non-intrinsically safe) equipment should be shutdown if it is safe to do so. This includes rig
engines, generators, lighting equipment etc. This should be because fired equipments may ignite the
well.
Initial Assessment
The On Scene Commander will proceed to make an initial assessment of the situation and inform the
Local emergency controller. The assessment will include:






Estimated flow of well fluids
Type of Blowout i.e. Water, Gas, Oil
Is the Blowout ignited?
The environmental sensitivity of the area
Distance to settlement;
Is pollution going to be an issue?
Notify Surrounding Communities


Surrounding facilities / communities shall be warned of any threat if required.
Notify local agencies including police to get additional help as per contingency plan
Secure the Area
The area around the rig (or well) shall be secured by onsite personnel. The prevailing wind direction
shall be checked and if necessary, any nearby personnel working in the area can be evacuated. The
road to the rig should be closed at a safe distance from the well and a guard shall be stationed to
keep unauthorized personnel from accessing the site. Personnel that are not experienced in handling
blowouts should not attempt to enter the area.
Blow Out Control
If initial attempts of controlling well are failed then external help including that of specialist should be
obtained as early as possible. In such cases gather required information which will help specialist in
taking a decision for a method to control the blow out.
Following information should be gathered:
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
247
OIL AND NATURAL GAS CORPORATION
LIMITED








EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Operation at the time of the incident
Last observed pressures
Present configuration of the well bore – casing, drill pipe, drill collars, packers, depths, etc. at
the time of the incident
BOP equipment in use at the time of the incident – position of all rams, top drive safety
valves, etc.
Last known status of wellhead or BOP components – open, closed, locked, damaged etc.
Estimate of flow rates and flow characteristics (gas and water)
Extent of damage sustained by the rig
Other information as dictated by the situation.
Setting the well on fire should only be considered if human life is threatened or there is a threat of an
uncontrolled explosion. Benefits of firing the well are no uncontrolled explosion and a reduction of
environmental damage.
Continue the well control operation till well is killed and expulsion of fluid is completely stopped.
Continue communication throughout and maintain records of all events.
Ensure all those who were injured have received proper treatment and all affected proper settlement.
Area Clean up Operation
Initiate cleanup operation of surrounding area which was affected by the blow out. Collect
contaminated soil and take it to approved site for disposal.
9.7.2
Oil Spillage
Oil spillage may occur from storage tank leakages, machines leaks etc.
Raising the Alarm
Any oil spillage will have to be notified by the person who discovers it. The person who discovers the
spillage should report the leak to his immediate supervisor and advise him of the situation. The
Supervisor shall assess the severity of the spillage and decide whether to sound the alarm.
Evacuation and Immediate Productive Response
Upon hearing the alarm, all non-essential site personnel will evacuate from the area and proceed to
the muster point upwind of the leak. On reaching the muster point, all personnel shall remain there
and listen out for instructions from the On Scene Commander. No personnel shall leave without the
permission of the OSC. If the spillage is a threat to the well, the driller shall shut in and secure the
well.
On scene commander should make initial assessment of leak. Consider if external fire tender is
required.
Safeguarding of Personnel
The OSC, with the help of the Emergency Controller will clear all non-essential personnel away from
the site to the upwind assembly point. The OSC will instruct personnel remaining to wear chemically
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
248
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
protective clothing and have SCBA sets available. The OSC will also ensure that injured personnel are
evacuated and provided with first aid/medical treatment as required.
The Muster Controller will account for all personnel on location. If personnel are missing, Search and
Rescue will only begin when all safety precautions are in place.
Information to Emergency Control team
The OSC will report to the Local emergency controller, providing the following information:








Substance spilled
Potential for / or presence of poisonous gases
Identification of possible ignition sources that could lead to fire or explosion
Identification of source of spill
Approximate volume of spill
Is the spill being contained or not?
The environmental sensitivity of the area (Flatness of the area, Distance to nearby field if any,
Distance to water source, Distance to settlements)
Any adjacent facilities or settlements which may be threatened
Inform Surrounding Communities
Facilities or communities downwind of the spill shall be notified if the spill is a threat to them and they
shall be made aware of the potential for fire or toxic fumes.
Notify local agencies including police to get additional help as per contingency plan
Control Ignition Sources
All ignition sources must be shutdown if safe to do so. Potential ignition sources include the following:









Smokers’ materials e.g. cigarettes and matches
Hot processes e.g. welding or grinding work
Engines including car engines
Machinery
Faulty or misused electrical equipment
Lighting Equipment
Friction e.g. from loose bearings or drive belts
Static electricity
GSM/Mobile Phones
Stop the Leak and Contain the Spill
The OSC with the Onsite Response Team will carry out the following measures to stop the leak. This
should be done after taking required precautions for toxic or combustible gases. The measures
include:




Attempt to stop the oil spillage.
Remove adjacent equipment if possible.
If spill is within the vicinity of the drilling facility, ensure well is secured
Remove any ignition source
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
249
OIL AND NATURAL GAS CORPORATION
LIMITED


9.7.3
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Prevent oil from entering any area where its accumulation can be dangerous or has a
detrimental effect.
Upon arrival of additional support liaise with them in coordination with the Local emergency
controller.
Notification to the Authorities
In case of major leak ensure that the following agencies are informed







9.7.4
Local District Collector and Police
Gujarat Pollution Control Board
Director General of Mines and Safety
Director General Hydrocarbons, New Delhi
Oil Industry Safety Directorate
Factory Inspector
Mamlatdar and Sarpanch
Identification and Compliance with Legislative Requirements
The principal Environmental Regulatory Agency in India is the Ministry of Environment and Forests
(MoEF), New Delhi. MoEF formulates environmental policies and accords environmental clearances for
different projects. The important environmental legislation in India is given in Table 9-7
Table 9-7: Key Environmental Legislation
Name
Scope and Objective
Key Areas
Operational
Agencies/Key Players
Water (Prevention
and Control of
Pollution Act,1974)
To provide for the
prevention and control
of water pollution and
enhancing the quality of
water
Controls sewage and industrial
effluent discharges
Central and State Pollution
Control Boards
Air (Prevention and
Control of
Pollution Act (1974)
To provide for the
prevention and control
of air pollution.
Controls emissions of air
pollutants.
Central and State Pollution
Control Boards.
Forest Act, 1927
To consolidate
acquisition of common
property such as forests.
Regulates access to natural
resources, state has a
monopoly right over land;
categories forests.
State government, forest
settlement officers.
Forest Conservation
Act, 1980
To halt India’s rapid
deforestation and
resulting Environmental
degradation.
Restriction on dereservation
and using forest for non-forest
purpose.
Central government.
Wildlife Protection
Act, 1980
To protect wildlife.
Creates protected areas
(national parks/sanctuaries)
categories of wildlife which are
protected.
Wildlife advisory boards;
central zoo authorities.
Environment
Protection Act, 1986
To provide for the
protection and
improvement of
An umbrella act for protection
of environment and related
matters.
Central government nodal
agency MoEF; can delegate
powers to state Department
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
250
OIL AND NATURAL GAS CORPORATION
LIMITED
Name
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Scope and Objective
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Key Areas
Environment.
Operational
Agencies/Key Players
of Environment.
Hazardous waste
(Management,
Handling and
Transboundary
Movement) Rules,
2010
To manage hazardous
waste arising out of
drilling operation
Identification, Labeling,
Handling, Treatment and
Disposal of Hazardous waste
Authorization from State
Pollution Control Board
Bio-Medical Waste
(Management and
Handling) Rules,
1998, Amended till
dated
To Manage Bio medical
waste arising out of
drilling operation
Identification, Labeling of Bio
Medical Waste
State Pollution Control Board
Battery
(Management and
Handling) Rules,
2000
To Manage Waste
arising from Batteries
Identification, Labeling,
Handling, and Disposal of
Bateries waste
State Pollution Control Board
(Source: Government of India Publications)
The following EHS regulatory requirements applicable to the activities being planned are given in
Table 9-8 which may be taken into consideration prior to actual commencement of operations. Action
required is to be reviewed quarterly.
Table 9-8: Applicable EHS Regulatory Requirements – Drilling Activities
Action Required /
S. No.
Applicable Legislation / Rule /
Permit
Requirement
1
NOC/Consent to establish from
the GPCB
A general permit to establish
facilities for drilling of wells.
NOC to be applied along
with the completed EIA
report.
Mine and Oilfields Regulations
Stipulation pertaining to general
safety, height of flare stacks and
other guidelines.
Relevant guidelines to be
perused before actual start
of work to evaluate
compliance.
3
Oil Industry Safety Directorate
Codes (OISD)
Applicable code for E&P activities:
OISD-GDN-166, OISD-GDN-200,
OISD-GDN-202, OISD-GDN-218,
OISD-STD-121, OISD-RP-174,
OISD-STD-175, OISD-STD-189
Evaluation of compliance
against the same.
4
Applicable permits from the CCE,
Nagpur for storage of explosive /
flammable material
Requirements of permits to be
ascertained prior to establishment
of facilities.
If required, applications to
be filed and required
permits to be obtained.
The Manufacture, Storage and
Import of Hazardous Chemicals
Rules, 1989 (as amended till date)
Listing of hazardous materials;
thresholds against which Safety
Audit and Safety Report has to be
maintained; Requirements of
disclosure of information;
Availability of MSDS’;
If required, safety audit and
safety report to be
prepared.
2
5
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Timing of Action
251
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Applicable Legislation / Rule /
Permit
Requirement
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Action Required /
Timing of Action
6
The Public Liability Act, 1991 (PLI)
Insurance to be taken out.
Check whether ONGC’s
insurance under PLI covers
the project under
consideration.
7
Chemical Accidents (Emergency
Planning, Preparedness and
Response) Rules, 1996
Preparation of Local & District
Level Crisis Groups, for
management of offsite
emergencies.
Identify whether Local or
District Level Crisis Groups
exist at site and take
proactive part in preparing
Offsite ERP.
9.8
Environmental Monitoring Programme
The following will be monitored on a regular basis throughout the drilling operation to ensure a high
level of environmental performance being maintained:











Ambient Air monitoring during exploratory drilling;PM10, Sox, Nox, hydrocarbon
Noise monitoring at workplace
Flue gas analysis
Drill cutting and wash water analysis
Sanitation facilities at camp-sites
Disposal of domestic wastewater to soak pit
Collection and disposal of kitchen waste, garbage, plastic waste, cables, used oil drums
Use of PUC certified Transportation system, controlled movement of vehicles on kuchha roads
to reduce dust generation
Handling and storage of HSD at camp on impervious ground at camp site during drilling
activities, soaking of spilled HSD.
Monitoring of required fire extinguishers at HSD storage area.
Monitoring of Usage of safety appliances like ear plugs/muffs, helmets etc.
Table 9-9 gives Environmental Monitoring Plan
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
252
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6 &
9
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Table 9-9: Environmental Monitoring Plan
S. no
Environmental Indicator
Monitoring Parameter
Period and Frequency
Design and Planning
1
Nearest Habitation to drill site
Distance between drill site and nearest habitation
2
Location and size of land leased
3
Present Crop Cultivation Pattern
Cropping period (in months)
During the project planning
4
Land acquisition
Record of compensation to be made to land owners
During the project planning before acquisition of land
5
Compliance of Air standards
During the project planning
6
Compliance of Noise standards
Percentage of machinery and equipment to be used,
which meets source emission standards
7
Water resources
Types and sources of water from drill site
During the project planning
8
Chemicals, fuel, Topsoil & Waste storage
Area to be occupied for storage
During the project planning
9
Emergency services
Type and availability of emergency services near drill
site
During the project planning
10
Evacuation Procedures
Arrangements for safe shelters, evacuation routes and
vehicles
During the project planning
Number of land owners affected
Total area leased for the drill sites (Ha)
During the project planning
During the project planning
Approach Roads and Site Development
11
Topsoil
Area occupied for topsoil storage and planned for
topsoil storage
During site development
Height of topsoil stockpile
12
Generation of dust during site preparation
Visual observation of dust in air
During site development
13
Generation of dust during storage of top soil
Visual observation of dust in air
During site development
PM10, NOx, SOx, CO, HC based on emission factors,
14
Emissions from vehicles and Machineries
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Visual observation of emissions;
Percentage of vehicles, which possess valid PUCC
Certificates
During site development
253
OIL AND NATURAL GAS CORPORATION LIMITED
S. no
Environmental Indicator
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6 &
9
Monitoring Parameter
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
Period and Frequency
Measurement of PM10, SOx, NOx and CO
15
Noise emissions from vehicles and
machineries
Noise pressure level in dB(A) near noise source
During site development
16
Dust generation due to movement of vehicles
Visual observation of dust in air
During site developement
17
Domestic waste water & Night Soil
Arrangements for disposal of waste water & night soil
During site development
Drilling and Testing of Wells
18
Gaseous pollutant emissions from DG set
Maintenance parameters (air, fuel filters & air-fuel
ratio) of DG sets influencing air emission
During drilling operation
Monitoring of PM10, NOx, SOx, VOC, HC
During drilling operation
20
Noise emission from DG Sets
Noise pressure level in dB(A)
During drilling operation
21
Noise emission from drilling rig
Noise pressure level in dB(A)
During drilling operation
22
Water usage for various activity
Daily consumption
During drilling operation
22
H/W from Spilled Chemicals/Oil
Area of Spill / Quantity Spilled / Severity of Spill /
Characterization of Spilled Substances for Contaminants
(Heavy Metals, Toxics etc.) Storage & Disposal Details
As and when spill occurs during drilling
23
Runoff
Supervision of functioning of conduits /drains
channelizing runoff into the waste pit Maintenance of
temporary storage area allocated for hazardous waste
& waste oil
During drilling operation
24
Waste Oil & Other waste
Volume of waste generated Details of storage &
disposal method
During drilling operation
25
Spent batteries
Numbers, size, Storage & disposal details Authorization
of waste recyclers of spent batteries
During drilling operation
26
Metallic, packing, scrap waste
Quantity of waste generated, Details of storage &
disposal
During drilling operation
27
Emissions from Flaring
Total CO, Non-Methane Hydrocarbons, NOx emission
estimates based on emission factors
During drilling operation
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
254
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6 &
9
ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN
S. no
Environmental Indicator
Monitoring Parameter
Period and Frequency
28
Kitchen waste
Quantity and disposal of kitchen waste
During drilling operation
29
waste water from rig operation
Quantity & quality of waste water
During drilling operation
30
Monitoring of sample of drilling fluid at site
pH, TDS, SS, COD, BOD, O&G, Conductivity & heavy
metals
During drilling operation
31
Ambient air monitoring as specified by
regulators at the premises
PM10, PM2.5, SO2, NOx, HC, VOC, CO
During drilling operation
Number and availability of trained personnel
During drilling operation
32
Emergency Evacuation during drilling
Availability of contingency plan for blow out, oil spill &
other emergency
During drilling operation
Decommissioning & Closure
33
Decommissioning waste
Quantity of waste generated
Detailed methods of storage & disposal
Visual observation of :
34
Site restoration
Once the decommissioning will start
Daily during decommissioning period
Clearing of decommissioning waste
and
Leveling of site
once after site restoration
Relaying of top soil
Regeneration of top soil
35
Consultation with Villagers
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Number of consultations with villagers regarding site
restoration
Before starting of demobilization & restoration of site to its
original condition
255
OIL AND NATURAL GAS CORPORATION
LIMITED
9.9
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ENVIRONMENTAL MANAGEMENT AND
MONITORING PLAN
Project Expenditure on environmental Matter
Table 9-10 gives the expenditure on environmental matters
Table 9-10: Expenditure on Environmental Matters
S No.
Description
Amount
(in Rs.)
Fixed Cost
1.
Cost of pit excavation per well
85,000
2.
Cost of HDPE liner per well
70,000
3.
Cost of site restoration per well (filling up of pit and retaining other
area in case of well found economic quantity of hydrocarbon)
3,00,000
4
Cost of site restoration (in case no economic quantity of
hydrocarbon found)
15,00,000
6
Cost of NOC (investment up to 5 cores per well)
12,500
7
Environmental monitoring during drilling per well
30000
8
Total (Economic quantity of hydrocarbon found)
4,97,500
Total (No economic quantity of hydrocarbon found)
16,97,500
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
256
OIL AND NATURAL GAS CORPORATION
LIMITED
10
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
SUMMARY AND CONCLUSION
SUMMARY AND CONCLUSIONS
An Environment Impact Assessment report has been prepared for this exploratory drilling project
based on existing baseline environmental quality data collected for postmonsson season 2014;
Identification and prediction of significant environmental impacts due to the proposed drilling activity
followed by delineation of appropriate impact mitigation measures and suggestion for implementing
this measures by preparing an Environmental Management Plan (EMP).
10.1
Salient Features of the Project
The salient features of the proposed drilling project are given in Table 10-1.
Table 10-1: Salient Features of the Proposed Project
S. No
Features
Details
1
Location Details
The blocks CB-ONN-2010/1,6,9 of ONGC are located in
Banaskantha, Gandhinagar and Ahmedabad Districts respectively
2
Number of exploratory wells to be
drilled
ONGC proposes to drill 22 exploratory wells.
3
Depth of drilling
Up to 3000 m
4
Activity involved
Temporary land lease, Site and access road preparation, drilling of
exploratory wells and testing operation,
5
Area required
110 × 110 m for each exploratory well
6
Cost of the drilling 126 exploratory
wells
~INR 350 Crores
7
Drilling Fluid
Water based mud will be used for drilling exploratory wells.
8
Man power requirement at the
time of drilling
30 - 40 person at each site at time
9
Water Requirement
~35 Kilo liters per day per wells
10
Waste water generation and
disposal
Waste water will be discharged in HDPE lined pit at site
11
Domestic waste water
~1.0 m3 per day, domestic waste water will be discharged in soak
pit
12
Generation of drill cutting and
disposal
It is estimated that 150-200 MT of formation cuttings and few
hundred m3 of mud from spent drilling fluid will be generated in
the form of solid waste, during the drilling operation. Drill Cutting
and drilling mud will be disposed off in accordance with
Notification dated 30th August 2005 - G.S.R 546 (E) point no C
“Guidelines for Disposal of Solid Waste, Drill Cutting and Drilling
Fluids for Offshore and Onshore Drilling Operation”.
Cuttings are collected, dried and disposed off in an
environmentally safe manner in HDPE lined pit
13
Generation of used oil and
disposal
It is expected that 200 liters of waste lube oil will be generated
during drilling operation of one well, which will be disposed off
through authorized recycler as per ONGC’s policy.
14
Power Requirement
The power required for driving the drilling rig, circulation system
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
257
OIL AND NATURAL GAS CORPORATION
LIMITED
S. No
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
Features
SUMMARY AND CONCLUSION
Details
and for providing lighting shall be generated by DG sets of 1250
KVA (3 No. one standby), which will consume 250-300 L/hr High
Speed Diesel.
16
10.2
Sensitive Area
There is no Notified/ Protected ecologically sensitive area
including National park, Sanctuary, Elephant/tiger reserves
existing in the study area covering 10 km radial distance from the
mining leases.
Conclusion
During the environmental assessment study, all possible environmental aspects have been adequately
addressed and necessary control measures have been suggested to meet with statutory requirements.
The proposed drilling project will contribute to economic growth in indirect way and may help in
meeting the increasing demands of oil & gas if proved to be economically beneficial for future
production.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
258
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
DISCLOSURE OF CONSULTANTS
11
DISCLOSURE OF CONSULTANTS
11.1
Brief resume and Nature of Consultancy Rendered by Kadam Environmental
Consultants
Kadam Environmental Consultants (KEC) was established in 1981 and has more than 30 years of
varied experience in the field of environment. The mission of company is providing sustainable
solutions on “Environment for Development”.
The company has a dedicated and experienced team of more than 200 technical staff. The team
comprises of environmental planners and engineers, chemical and civil engineers, geologists, socioeconomic experts, microbiologists, zoologists, botanists and industrial/analytical chemists. The
Company’s strength lies in project management, performing risk assessment, formulating
environmental disaster plans, use of satellite Imagery in impact assessment, use of mathematical
models for air, water and soil assessment and expertise in public consultation.
The company has three sister concerns namely : Kadam Pollution Control Pvt. Ltd dealing in
operation and maintenance contracts of sewage, effluent and water treatment plants , Kadam
Projects dealing in supply of Effluent and Sewage treatment plants on turnkey basis and
Kadam Enviro International Consultancy headquartered in UAE, offering Environmental and Safety
Consultancy services in the Middle East Region.
Customer services are mainly categorized into:



Consultancy Services ( since more than 20 years) in the field of Environmental Impact
Assessment , Environmental Site Assessment and Due Diligence, Enviro Legal Services,
Statutory Environmental Audits/Statements, Risk Assessments and HAZOP, Energy Audit,
Environmental , Health and Safety Management Systems and Waste Management Systems.
Engineering Services ( Since almost 30 years) for collection and conveyance of liquid and
solid wastes, designing and executing effluent and sewage treatment plants, municipal solid
waste studies and solid waste management systems, bio gas plants , rain water harvesting
systems and deep sea marine disposal systems.
Laboratory services (since more than 25 years) in chemical and waste testing, microbiology,
soil testing and Field sampling (we have amongst the highest number of environmental field
sampling equipments amongst environmental companies in the country. . The company has a
well equipped laboratory with modern instruments and experienced staff catering to the need
of statutory and advisory environmental testing for air, water and wastewater and hazardous
solid waste.
The group has a varied industrial clientele encompassing Indian and Multinational Companies covering
the industrial and services spectrum viz. Bulk Drugs and Pharmaceuticals, Paints, Chemicals, Oil & Gas,
Real Estate, Hospitality and Infrastructure sectors. Whilst the heart of our clientle encompasses the
top 50/Blue Chip Indian companies ( Reliance Industries, ONGC, Infosys, ITC, ICICI, Indian Oil, GAIL,
ONGC/GSPL, Sun Pharma, NTPC, Reliance Energy/Reliance Power, Welspun and many others) who
have placed implicit trust in us over the decades. We are increasingly working with several
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
259
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION
LIMITED
DISCLOSURE OF CONSULTANTS
multinationals (such as : ABB, Alstom, Areva, GM, Hindustan Lever, Honeywell, Kohler, Sabic and Tyco
amongst others) who value our deep rooted general domain and India centric functional knowledge,
reasonable costs and comparable services as those offered by our multi national competitors. Their
continued patronage is our biggest testimonial.
The Group has branch offices at Delhi and other places in Gujarat and an overseas office in the UAE.
KEC has received ISO 9001:2008 certification for its Quality management System from BSI-MS.
The company is an accredited EIA Consultant Organization by NABET, Quality Council of India under
EIA accreditation scheme as per mandatory requirement of the MOEF, Govt. of India for carrying out
Environmental Clearance studies. It has approved EIA coordinators and Field Area Experts for
undertaking Environmental and related studies in seven approved sectors.
11.2
EIA Team Members
Work presented in this report was carried out by KEC with active co-operation from ONGC, KEC team
members (along with their role in the project) is given below:
Table 11-1: EIA Team Members
Name & Designation
Area
Task
Mr. Jayesh Makwana
(Senior Consultant)
Team Memeber Assisting
EIA coordinator
Coordinating all the activities, Team member for
ground truth survey, & Team member for EIA
Report writing, Team member for AQ, RH
Mr. Braj Vallabh Pandey
SE
Team Member
Ms Shruti Shah
LU
Team Member
Mr. Mehul Petkar
HG, G, SC
Team Member
(Sr. Environmental
Scientist)
Field Monitoring
In-charge of Field Monitoring, data collection and
coordination with Laboratory, Team member for
analysis of results, Team member for ground
truth survey.
Ms Arpana Patel
Lab - Chemist
Analysis of Field monitoring data.
Mr. Krunal Kharva Mr.
Jitesh Mali
Drafts man
Drawing Land use & Land cover diagrams
Field Monitoring
Collection of Data
Mr. Mahendra Jadhav
Mr. Mahendra
(Field Technician)
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
260
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANNEXURES
ANNEXURES
Annexure 1: ToR Letter
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
261
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
262
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
263
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS
IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
264
OIL AND NATURAL GAS CORPORATION LIMITED
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANNEXURES
Annexure 2: Long Term Meteorological Data {Climatological Tables (1961 – 1990)} – IMD Ahmedabad
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
265
OIL AND NATURAL GAS CORPORATION LIMITED
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
ANNEXURES
266
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 3: National Ambient Air Quality Standards
Concentration in Ambient Air
Time Weighted
Average
Industrial,
Residential,
Rural and other
area
Ecologically
Sensitive area
(Notified by
Central
Government)
Method of measurement
Sulphur Dioxide
(SO2)
Annual Avg*
50 µg/m3
20 µg/m3
Improved West and Gacke
method
24 hrs.**
80 µg/m3
80 µg/m3
Ultraviolet fluorescence
Oxides of Nitrogen
(NOx)
Annual Avg*
40 µg/m3
30 µg/m3
Modified Jacab and Hochheiser
(Na-arsenite)
24 hrs.**
80 µg/m3
80 µg/m3
Chemiluminescence
Annual Avg*
60 µg/m3
60 µg/m3
24 hrs.**
100 µg/m3
100 µg/m3
Annual Avg*
40 µg/m3
40 µg/m3
24 hrs.**
60 µg/m3
60 µg/m3
8 hrs.**
100 µg/m3
100 µg/m3
Pollutants
Particulate Matter
(Size less than 10
µm) or PM10 µg/m3
Particulate Matter
(Size less than 2.5
µm) or PM2.5 µg/m3
Ozone (O3) µg/m3
Lead (Pb)
1 hrs.**
180 µg/m3
100 µg/m3
Annual Avg*
0.50 µg/m3
0.50 µg/m3
24 hrs.**
1.0 µg/m3
1.0 µg/m3
Gravimetric
TOEM
Beta attenuation
Gravimetric
TOEM
Beta attenuation
UV photometric
Chemiluminescence
Chemical Method
AAS Method after sampling using
EPM 2000 or equivalent filter
paper
ED-XRF using Teflon filter.
Carbon Monoxide
(CO)
8 hrs.**
2.0 mg/m3
2.0 mg/m3
1 hr.
4.0 mg/m3
4.0 mg/m3
Non-disbersive, Monoxide
Infrared spectroscopy (NDIR)
Ammonia (NH3)
µg/m3
Annual Avg*
100 µg/m3
100 µg/m3
Chemiluminescence
24 hrs.**
400 µg/m3
400 µg/m3
Indophenol blue method
Gas Chromatography based
continuous analyzer
Benzene µg/m3
Annual Avg*
05 µg/m3
05 µg/m3
Benzo(a)pyrene –
Particulate phase
only, µg/m3
Annual Avg*
01 µg/m3
01 µg/m3
Solvent Extraction followed by
HPLC/GC analysis.
Arsenic As), µg/m3
Annual Avg*
06 µg/m3
06 µg/m3
AAS/ICP Method after sampling
on EPM 2000 or equivalent filter
paper
Nickel (Ni), µg/m3
Annual Avg*
20 µg/m3
20 µg/m3
AAS/ICP Method after sampling
on EPM 2000 or equivalent filter
paper
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
Adsorption & Desorption followed
by GC analysis
267
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Annexure 4: Ambient Air Quality Monitoring Results
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2035
173
<1145
<1
2114
169
<1145
<1
2492
395
<1145
<1
2191
283
<1145
<1
1
AA1
04-10-2014
Dheriyana
Rural
77
8.3
14.2
2
AA1
06-10-2014
Dheriyana
Rural
63
8.0
18.8
3
AA1
11-10-2014
Dheriyana
Rural
71
8.0
21.9
4
AA1
13-10-2014
Dheriyana
Rural
59
8.0
19.0
5
AA1
18-10-2014
Dheriyana
Rural
48
8.7
24.8
6
AA1
22-10-2014
Dheriyana
Rural
63
8.5
26.9
7
AA1
28-10-2014
Dheriyana
Rural
71
8.0
19.8
8
AA1
29-10-2014
Dheriyana
Rural
41
8.0
24.8
9
AA1
01-11-2014
Dheriyana
Rural
54
9.6
23.7
10
AA1
05-11-2014
Dheriyana
Rural
61
8.8
23.1
11
AA1
12-11-2014
Dheriyana
Rural
53
8.3
15.2
12
AA1
13-11-2014
Dheriyana
Rural
72
8.0
18.1
13
AA1
21-11-2014
Dheriyana
Rural
59
8.5
23.1
14
AA1
22-11-2014
Dheriyana
Rural
79
8.4
15.2
15
AA1
26-11-2014
Dheriyana
Rural
56
9.1
19.8
16
AA1
27-11-2014
Dheriyana
Rural
78
9.4
22.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
268
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1957
281
<1145
<1
1951
116
<1145
<1
17
AA1
05-12-2014
Dheriyana
Rural
62
8.6
25.4
18
AA1
06-12-2014
Dheriyana
Rural
74
8.6
25.5
19
AA1
15-12-2014
Dheriyana
Rural
61
8.0
20.9
20
AA1
16-12-2014
Dheriyana
Rural
77
8.0
21.9
21
AA1
22-12-2014
Dheriyana
Rural
79
9.0
24.7
22
AA1
23-12-2014
Dheriyana
Rural
51
8.0
24.7
1
AA2
04-10-2014
Vav
Rural
69
8.0
24.6
2
AA2
06-10-2014
Vav
Rural
70
8.1
26.0
3
AA2
11-10-2014
Vav
Rural
71
8.0
25.7
4
AA2
13-10-2014
Vav
Rural
63
8.0
26.4
5
AA2
18-10-2014
Vav
Rural
75
8.0
28.4
6
AA2
22-10-2014
Vav
Rural
73
8.0
27.8
7
AA2
28-10-2014
Vav
Rural
78
8.0
29.0
8
AA2
29-10-2014
Vav
Rural
76
9.9
20.2
9
AA2
01-11-2014
Vav
Rural
66
8.9
28.0
10
AA2
05-11-2014
Vav
Rural
46
8.0
20.7
11
AA2
12-11-2014
Vav
Rural
74
8.6
24.2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
269
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2910
95
<1145
<1
2606
263
<1145
<1
12
AA2
13-11-2014
Vav
Rural
51
9.1
28.4
13
AA2
19-11-2014
Vav
Rural
61
9.8
27.3
14
AA2
21-11-2014
Vav
Rural
78
8.0
17.7
15
AA2
22-11-2014
Vav
Rural
73
8.0
18.9
16
AA2
26-11-2014
Vav
Rural
58
8.0
26.2
17
AA2
27-11-2014
Vav
Rural
45
8.0
24.2
18
AA2
05-12-2014
Vav
Rural
79
8.0
23.2
4395
585
<1145
<1
19
AA2
06-12-2014
Vav
Rural
42
9.1
25.0
878
107
<1145
<1
20
AA2
15-12-2014
Vav
Rural
62
8.0
24.6
21
AA2
16-12-2014
Vav
Rural
76
8.0
25.3
22
AA2
22-12-2014
Vav
Rural
74
8.0
25.4
23
AA2
23-12-2014
Vav
Rural
70
8.0
20.2
1
AA3
03-10-2014
Bhankhod
Rural
68
8.8
16.8
2
AA3
07-10-2014
Bhankhod
Rural
46
9.2
19.9
3
AA3
10-10-2014
Bhankhod
Rural
68
8.0
20.5
4
AA3
14-10-2014
Bhankhod
Rural
65
8.0
17.7
5
AA3
17-10-2014
Bhankhod
Rural
69
8.0
15.4
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
270
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2874
-
<1145
<1
6
AA3
27-10-2014
Bhankhod
Rural
63
8.0
22.5
7
AA3
04-11-2014
Bhankhod
Rural
66
8.4
20.7
8
AA3
06-11-2014
Bhankhod
Rural
56
8.1
17.8
9
AA3
10-11-2014
Bhankhod
Rural
47
9.1
18.4
10
AA3
11-11-2014
Bhankhod
Rural
54
9.0
16.8
11
AA3
19-11-2014
Bhankhod
Rural
38
8.7
18.3
3226
330
<1145
<1
12
AA3
20-11-2014
Bhankhod
Rural
41
8.1
21.6
2940
178
<1145
<1
13
AA3
25-11-2014
Bhankhod
Rural
54
8.0
14.7
14
AA3
28-11-2014
Bhankhod
Rural
61
8.6
17.0
15
AA3
03-12-2014
Bhankhod
Rural
59
8.0
17.9
2526
416
<1145
<1
16
AA3
04-12-2014
Bhankhod
Rural
66
8.0
14.9
17
AA3
07-12-2014
Bhankhod
Rural
55
8.9
14.7
18
AA3
08-12-2014
Bhankhod
Rural
44
9.4
16.5
19
AA3
12-12-2014
Bhankhod
Rural
33
8.1
19.6
20
AA3
13-12-2014
Bhankhod
Rural
43
9.3
20.0
927
208
<1145
<1
21
AA3
17-12-2014
Bhankhod
Rural
67
8.0
15.8
22
AA3
18-12-2014
Bhankhod
Rural
65
8.4
15.0
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
271
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2260
167
<1145
<1
1967
164
<1145
<1
23
AA3
24-12-2014
Bhankhod
Rural
68
8.0
15.9
24
AA3
25-12-2014
Bhankhod
Rural
64
8.0
14.5
1
AA4
03-10-2014
Lalpura
Rural
63
8.0
15.4
2
AA4
07-10-2014
Lalpura
Rural
60
8.0
15.0
3
AA4
10-10-2014
Lalpura
Rural
65
9.4
14.1
4
AA4
14-10-2014
Lalpura
Rural
56
8.0
11.3
5
AA4
17-10-2014
Lalpura
Rural
75
8.9
11.7
6
AA4
30-10-2014
Lalpura
Rural
47
8.0
19.9
7
AA4
31-10-2014
Lalpura
Rural
62
8.0
16.1
8
AA4
04-11-2014
Lalpura
Rural
54
8.0
12.7
9
AA4
06-11-2014
Lalpura
Rural
52
8.0
19.4
10
AA4
09-11-2014
Lalpura
Rural
62
8.6
13.0
11
AA4
10-11-2014
Lalpura
Rural
39
8.7
15.2
12
AA4
19-11-2014
Lalpura
Rural
45
9.7
11.4
3608
542
<1145
<1
13
AA4
20-11-2014
Lalpura
Rural
64
8.7
18.0
3275
269
<1145
<1
14
AA4
25-11-2014
Lalpura
Rural
66
8.0
17.3
15
AA4
03-12-2014
Lalpura
Rural
43
9.5
12.9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
272
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1007
174
<1145
<1
16
AA4
04-12-2014
Lalpura
Rural
61
8.4
15.1
17
AA4
07-12-2014
Lalpura
Rural
51
9.8
18.4
18
AA4
08-12-2014
Lalpura
Rural
43
9.9
13.1
19
AA4
12-12-2014
Lalpura
Rural
51
9.7
13.4
20
AA4
13-12-2014
Lalpura
Rural
59
9.6
17.6
21
AA4
17-12-2014
Lalpura
Rural
68
8.4
10.0
22
AA4
18-12-2014
Lalpura
Rural
61
8.0
13.1
23
AA4
24-12-2014
Lalpura
Rural
48
8.0
14.7
24
AA4
25-12-2014
Lalpura
Rural
57
8.0
11.4
1
AA5
02-10-2014
Kotarwada
Rural
71
8.0
13.4
2
AA5
08-10-2014
Kotarwada
Rural
39
8.0
21.4
3
AA5
09-10-2014
Kotarwada
Rural
43
8.4
20.3
4
AA5
15-10-2014
Kotarwada
Rural
63
8.0
21.8
5
AA5
16-10-2014
Kotarwada
Rural
36
8.2
19.6
6
AA5
20-10-2014
Kotarwada
Rural
59
8.0
11.9
7
AA5
21-10-2014
Kotarwada
Rural
33
8.0
16.6
8
AA5
30-10-2014
Kotarwada
Rural
48
8.6
17.3
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
273
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
3274
191
<1145
<1
2040
195
<1145
<1
1397
196
<1145
<1
9
AA5
03-11-2014
Kotarwada
Rural
49
8.0
20.4
10
AA5
07-11-2014
Kotarwada
Rural
66
8.0
23.9
11
AA5
14-11-2014
Kotarwada
Rural
74
8.0
23.2
12
AA5
15-11-2014
Kotarwada
Rural
40
8.0
18.0
13
AA5
17-11-2014
Kotarwada
Rural
68
8.7
20.7
14
AA5
18-11-2014
Kotarwada
Rural
60
8.3
17.7
15
AA5
24-11-2014
Kotarwada
Rural
75
8.0
22.0
16
AA5
29-11-2014
Kotarwada
Rural
63
8.0
18.5
17
AA5
01-12-2014
Kotarwada
Rural
48
9.3
20.7
18
AA5
09-12-2014
Kotarwada
Rural
53
9.3
19.7
19
AA5
10-12-2014
Kotarwada
Rural
63
9.1
22.1
20
AA5
11-12-2014
Kotarwada
Rural
59
8.5
21.4
21
AA5
19-12-2014
Kotarwada
Rural
66
8.5
20.6
22
AA5
20-12-2014
Kotarwada
Rural
65
8.0
23.6
23
AA5
26-12-2014
Kotarwada
Rural
71
8.0
20.1
24
AA5
27-12-2014
Kotarwada
Rural
59
8.0
22.7
1
AA6
02-10-2014
Paldi
Rural
67
8.0
14.6
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
274
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1965
106
<1145
<1
3033
249
<1145
<1
2454
204
<1145
<1
2
AA6
08-10-2014
Paldi
Rural
58
8.1
19.7
3
AA6
09-10-2014
Paldi
Rural
68
8.0
17.3
4
AA6
15-10-2014
Paldi
Rural
70
8.0
21.4
5
AA6
16-10-2014
Paldi
Rural
47
8.6
18.5
6
AA6
20-10-2014
Paldi
Rural
31
8.0
16.5
7
AA6
21-10-2014
Paldi
Rural
49
8.0
21.9
8
AA6
27-10-2014
Paldi
Rural
74
8.0
21.4
9
AA6
31-10-2014
Paldi
Rural
67
9.6
15.5
10
AA6
03-11-2014
Paldi
Rural
48
9.1
20.0
11
AA6
07-11-2014
Paldi
Rural
53
8.0
17.1
12
AA6
09-11-2014
Paldi
Rural
55
8.9
16.9
13
AA6
15-11-2014
Paldi
Rural
74
8.0
19.5
14
AA6
17-11-2014
Paldi
Rural
60
9.7
15.8
15
AA6
18-11-2014
Paldi
Rural
69
8.4
14.0
16
AA6
24-11-2014
Paldi
Rural
69
8.0
16.8
17
AA6
29-11-2014
Paldi
Rural
72
8.0
16.9
18
AA6
01-12-2014
Paldi
Rural
68
9.3
19.6
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
275
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
19
AA6
09-12-2014
Paldi
Rural
62
9.6
18.4
1168
174
<1145
<1
20
AA6
10-12-2014
Paldi
Rural
51
8.0
17.4
1180
152
<1145
<1
21
AA6
11-12-2014
Paldi
Rural
64
8.8
21.2
22
AA6
19-12-2014
Paldi
Rural
72
8.0
18.8
23
AA6
20-12-2014
Paldi
Rural
73
8.0
14.4
24
AA6
26-12-2014
Paldi
Rural
70
8.0
13.8
1
AA7
01-10-2014
Nardipur
Rural
78
8.7
23.5
2
AA7
02-10-2014
Nardipur
Rural
63
9.0
19.1
3
AA7
06-10-2014
Nardipur
Rural
72
8.0
17.4
4
AA7
07-10-2014
Nardipur
Rural
69
9.2
11.1
5
AA7
15-10-2014
Nardipur
Rural
53
8.0
14.5
6
AA7
16-10-2014
Nardipur
Rural
53
9.6
18.7
1880
139
<1145
<1
7
AA7
29-10-2014
Nardipur
Rural
67
8.0
17.3
8
AA7
30-10-2014
Nardipur
Rural
60
9.2
11.4
9
AA7
03-11-2014
Nardipur
Rural
71
9.3
15.3
10
AA7
04-11-2014
Nardipur
Rural
65
9.5
18.5
11
AA7
11-11-2014
Nardipur
Rural
42
9.6
16.6
1863
206
<1145
<1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
276
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
3287
347
<1145
<1
2172
186
<1145
<1
2161
212
<1145
<1
1941
166
<1145
<1
12
AA7
12-11-2014
Nardipur
Rural
68
8.0
14.4
13
AA7
22-11-2014
Nardipur
Rural
64
8.0
12.5
14
AA7
23-11-2014
Nardipur
Rural
52
8.0
17.6
15
AA7
24-11-2014
Nardipur
Rural
68
8.4
18.9
16
AA7
25-11-2014
Nardipur
Rural
64
8.0
18.8
17
AA7
08-12-2014
Nardipur
Rural
67
8.0
21.4
18
AA7
09-12-2014
Nardipur
Rural
65
8.5
20.3
19
AA7
15-12-2014
Nardipur
Rural
58
8.7
20.5
20
AA7
16-12-2014
Nardipur
Rural
55
8.0
17.3
21
AA7
24-12-2014
Nardipur
Rural
58
8.3
15.4
22
AA7
25-12-2014
Nardipur
Rural
56
8.0
14.8
1
AA8
01-10-2014
Soja
Rural
34
8.0
20.1
2
AA8
02-10-2014
Soja
Rural
72
8.0
14.9
3
AA8
06-10-2014
Soja
Rural
59
8.6
17.8
4
AA8
07-10-2014
Soja
Rural
56
8.3
10.0
5
AA8
15-10-2014
Soja
Rural
64
8.0
21.6
6
AA8
16-10-2014
Soja
Rural
53
9.4
19.2
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
277
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1677
191
<1145
<1
3615
300
<1145
<1
1976
331
<1145
<1
1388
147
<1145
<1
7
AA8
29-10-2014
Soja
Rural
47
9.5
21.4
8
AA8
30-10-2014
Soja
Rural
59
9.8
19.4
9
AA8
03-11-2014
Soja
Rural
69
8.1
18.1
10
AA8
04-11-2014
Soja
Rural
37
8.0
14.7
11
AA8
11-11-2014
Soja
Rural
62
8.9
16.4
12
AA8
12-11-2014
Soja
Rural
70
9.4
16.2
13
AA8
21-11-2014
Soja
Rural
37
8.0
14.6
14
AA8
23-11-2014
Soja
Rural
37
8.0
14.8
15
AA8
24-11-2014
Soja
Rural
39
8.0
11.8
16
AA8
25-11-2014
Soja
Rural
59
8.0
21.5
17
AA8
08-12-2014
Soja
Rural
71
8.0
17.7
18
AA8
09-12-2014
Soja
Rural
60
8.0
14.4
19
AA8
15-12-2014
Soja
Rural
70
8.3
23.9
20
AA8
16-12-2014
Soja
Rural
34
8.0
14.4
21
AA8
24-12-2014
Soja
Rural
69
9.8
14.1
22
AA8
25-12-2014
Soja
Rural
51
8.0
23.5
1
AA9
03-10-2014
Sobhasan
Rural
72
9.8
21.0
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
278
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
3256
374
<1145
<1
2
AA9
04-10-2014
Sobhasan
Rural
66
8.0
15.4
3
AA9
08-10-2014
Sobhasan
Rural
72
8.0
10.0
4
AA9
09-10-2014
Sobhasan
Rural
32
8.0
16.7
5
AA9
17-10-2014
Sobhasan
Rural
79
8.5
17.6
6
AA9
18-10-2014
Sobhasan
Rural
49
8.0
18.0
7
AA9
05-11-2014
Sobhasan
Rural
65
8.0
17.5
8
AA9
14-11-2014
Sobhasan
Rural
69
8.0
20.1
9
AA9
15-11-2014
Sobhasan
Rural
61
8.6
21.4
10
AA9
19-11-2014
Sobhasan
Rural
71
8.0
14.6
11
AA9
20-11-2014
Sobhasan
Rural
60
8.0
18.8
12
AA9
26-11-2014
Sobhasan
Rural
48
8.3
21.0
13
AA9
27-11-2014
Sobhasan
Rural
72
8.0
17.1
2568
170
<1145
<1
14
AA9
06-12-2014
Sobhasan
Rural
56
8.0
22.1
2201
326
<1145
<1
15
AA9
07-12-2014
Sobhasan
Rural
67
8.2
17.5
16
AA9
10-12-2014
Sobhasan
Rural
49
8.0
16.6
1897
195
<1145
<1
17
AA9
11-12-2014
Sobhasan
Rural
58
9.1
17.6
18
AA9
28-12-2014
Sobhasan
Rural
33
8.0
17.8
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
279
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
3731
393
<1145
<1
19
AA9
29-12-2014
Sobhasan
Rural
66
8.5
17.3
1
AA10
03-10-2014
Vagosana
Rural
57
9.84
15.0
2
AA10
04-10-2014
Vagosana
Rural
43
9.78
22.3
3
AA10
08-10-2014
Vagosana
Rural
59
8.54
16.6
4
AA10
09-10-2014
Vagosana
Rural
80
9.89
18.4
5
AA10
18-10-2014
Vagosana
Rural
83
8.85
23.7
6
AA10
19-10-2014
Vagosana
Rural
96
7.73
20.9
7
AA10
05-11-2014
Vagosana
Rural
93
6.63
20.3
8
AA10
13-11-2014
Vagosana
Rural
95
9.93
22.4
9
AA10
14-11-2014
Vagosana
Rural
90
9.90
11.8
10
AA10
19-11-2014
Vagosana
Rural
91
7.10
14.4
11
AA10
20-11-2014
Vagosana
Rural
74
3.35
14.7
12
AA10
26-11-2014
Vagosana
Rural
77
9.67
19.6
13
AA10
27-11-2014
Vagosana
Rural
82
9.44
15.3
2627
193
<1145
<1
14
AA10
06-12-2014
Vagosana
Rural
90
6.00
16.1
2721
445
<1145
<1
15
AA10
07-12-2014
Vagosana
Rural
87
7.33
17.4
16
AA10
10-12-2014
Vagosana
Rural
98
8.14
18.0
1413
153
<1145
<1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
280
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1857
137
<1145
<1
1675
120
<1145
<1
3394
224
<1145
<1
17
AA10
11-12-2014
Vagosana
Rural
78
7.89
15.0
1
AA11
01-10-14
Vasna
Rural
53
8.0
16.2
2
AA11
02-10-14
Vasna
Rural
70
8.5
17.1
3
AA11
10-10-14
Vasna
Rural
49
8.9
12.6
4
AA11
11-10-14
Vasna
Rural
43
9.2
18.6
5
AA11
17-10-14
Vasna
Rural
85
9.1
15.2
6
AA11
18-10-14
Vasna
Rural
70
8.6
21.3
7
AA11
30-10-14
Vasna
Rural
77
8.0
15.8
8
AA11
31-10-14
Vasna
Rural
60
8.9
24.9
9
AA11
03-11-14
Vasna
Rural
47
8.5
16.2
10
AA11
04-11-14
Vasna
Rural
59
8.9
17.4
11
AA11
10-11-14
Vasna
Rural
85
8.0
21.9
12
AA11
11-11-14
Vasna
Rural
61
8.0
14.6
13
AA11
20-11-14
Vasna
Rural
67
9.2
15.5
14
AA11
21-11-14
Vasna
Rural
47
8.0
12.4
15
AA11
25-11-14
Vasna
Rural
75
8.0
16.5
16
AA11
26-11-14
Vasna
Rural
80
8.0
16.0
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
281
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1610
332
<1145
<1
965
109
<1145
<1
17
AA11
01-12-14
Vasna
Rural
76
8.3
19.6
18
AA11
02-12-14
Vasna
Rural
65
8.0
14.5
19
AA11
08-12-14
Vasna
Rural
45
8.0
14.9
20
AA11
09-12-14
Vasna
Rural
56
8.7
16.5
21
AA11
16-12-14
Vasna
Rural
58
8.0
22.9
22
AA11
17-12-14
Vasna
Rural
78
9.5
11.7
1
AA12
01-10-14
Kunvar
Rural
76
8.0
21.6
2
AA12
02-10-14
Kunvar
Rural
53
8.0
22.0
3
AA12
08-10-14
Kunvar
Rural
72
8.0
19.6
4
AA12
09-10-14
Kunvar
Rural
67
8.0
23.2
5
AA12
13-10-14
Kunvar
Rural
75
9.7
19.2
6
AA12
14-10-14
Kunvar
Rural
76
8.1
19.7
7
AA12
20-10-14
Kunvar
Rural
53
8.6
19.7
8
AA12
21-10-14
Kunvar
Rural
64
8.0
21.9
9
AA12
28-10-14
Kunvar
Rural
69
9.5
18.9
10
AA12
29-10-14
Kunvar
Rural
79
8.0
23.8
11
AA12
05-11-14
Kunvar
Rural
67
8.0
21.3
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
282
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2296
351
<1145
<1
3468
179
<1145
<1
2752
350
<1145
<1
968
126
<1145
<1
12
AA12
06-11-14
Kunvar
Rural
64
8.5
19.5
13
AA12
12-11-14
Kunvar
Rural
42
9.3
16.1
14
AA12
13-11-14
Kunvar
Rural
45
9.8
21.6
15
AA12
23-11-14
Kunvar
Rural
62
8.4
14.4
16
AA12
24-11-14
Kunvar
Rural
55
8.4
10.0
17
AA12
27-11-14
Kunvar
Rural
65
8.9
11.1
18
AA12
28-11-14
Kunvar
Rural
48
8.6
13.7
19
AA12
01-12-14
Kunvar
Rural
56
8.5
14.4
20
AA12
02-12-14
Kunvar
Rural
67
8.5
21.2
21
AA12
08-12-14
Kunvar
Rural
41
8.2
18.7
22
AA12
09-12-14
Kunvar
Rural
86
9.1
23.8
23
AA12
16-12-14
Kunvar
Rural
73
8.0
13.9
24
AA12
17-12-14
Kunvar
Rural
76
8.7
16.0
1
AA13
03-10-14
Fangdi
Rural
86
8.0
11.9
2
AA13
04-10-14
Fangdi
Rural
72
8.0
16.3
3
AA13
08-10-14
Fangdi
Rural
79
8.1
19.8
4
AA13
09-10-14
Fangdi
Rural
79
8.0
16.6
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
283
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
5
AA13
13-10-14
Fangdi
Rural
88
8.0
12.8
6
AA13
14-10-14
Fangdi
Rural
62
8.2
24.1
7
AA13
20-10-14
Fangdi
Rural
87
8.0
22.6
8
AA13
21-10-14
Fangdi
Rural
73
8.1
20.9
9
AA13
28-10-14
Fangdi
Rural
66
8.0
18.2
10
AA13
29-10-14
Fangdi
Rural
58
10.4
22.2
11
AA13
12-11-14
Fangdi
Rural
67
9.7
19.5
12
AA13
13-11-14
Fangdi
Rural
79
8.8
21.1
13
AA13
21-11-14
Fangdi
Rural
82
8.0
20.8
14
AA13
22-11-14
Fangdi
Rural
43
8.0
16.0
3027
241
<1145
<1
15
AA13
25-11-14
Fangdi
Rural
66
8.0
19.1
4155
309
<1145
<1
16
AA13
26-11-14
Fangdi
Rural
69
8.9
20.1
17
AA13
03-12-14
Fangdi
Rural
50
9.0
16.1
18
AA13
04-12-14
Fangdi
Rural
59
9.8
18.4
848
179
<1145
<1
19
AA13
10-12-14
Fangdi
Rural
72
9.5
22.7
20
AA13
11-12-14
Fangdi
Rural
56
9.0
18.0
21
AA13
23-12-14
Fangdi
Rural
47
8.4
18.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
284
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
862
150
<1145
<1
1820
114
<1145
<1
22
AA13
25-12-14
Fangdi
Rural
45
8.0
15.3
23
AA13
26-12-14
Fangdi
Rural
76
8.4
10.0
1
AA14
03-10-14
Daran
Rural
85
8.0
17.3
2
AA14
04-10-14
Daran
Rural
72
8.0
18.0
3
AA14
06-10-14
Daran
Rural
84
9.1
23.0
4
AA14
07-10-14
Daran
Rural
62
8.0
15.1
5
AA14
15-10-14
Daran
Rural
50
8.0
17.7
6
AA14
16-10-14
Daran
Rural
75
9.1
20.4
7
AA14
22-10-14
Daran
Rural
74
9.8
23.9
8
AA14
27-10-14
Daran
Rural
48
8.0
25.4
9
AA14
31-10-14
Daran
Rural
58
11.4
17.8
10
AA14
14-11-14
Daran
Rural
83
8.0
22.3
11
AA14
15-11-14
Daran
Rural
78
9.2
21.2
1227
136
<1145
<1
12
AA14
27-11-14
Daran
Rural
78
8.0
18.3
3890
190
<1145
<1
13
AA14
28-11-14
Daran
Rural
62
9.5
16.6
14
AA14
29-11-14
Daran
Rural
84
8.0
17.1
15
AA14
30-11-14
Daran
Rural
63
8.0
21.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
285
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
1013
184
<1145
<1
2181
346
<1145
<1
3339
265
<1145
<1
16
AA14
03-12-14
Daran
Rural
79
8.8
16.7
17
AA14
04-12-14
Daran
Rural
80
8.0
17.5
18
AA14
10-12-14
Daran
Rural
55
9.0
23.9
19
AA14
11-12-14
Daran
Rural
64
8.8
26.1
21
AA14
21-12-14
Daran
Rural
62
8.0
12.5
1
AA15
06-10-14
Lodariya
Rural
76
8.1
17.4
2
AA15
07-10-14
Lodariya
Rural
60
8.0
19.8
3
AA15
15-10-14
Lodariya
Rural
63
8.0
16.6
4
AA15
16-10-14
Lodariya
Rural
36
9.7
18.0
5
AA15
22-10-14
Lodariya
Rural
66
9.4
17.0
6
AA15
27-10-14
Lodariya
Rural
49
9.1
17.8
7
AA15
31-10-14
Lodariya
Rural
56
8.7
20.9
8
AA15
14-11-14
Lodariya
Rural
39
9.7
19.3
9
AA15
15-11-14
Lodariya
Rural
60
8.1
14.6
10
AA15
27-11-14
Lodariya
Rural
73
8.0
23.1
11
AA15
28-11-14
Lodariya
Rural
70
8.0
17.9
12
AA15
29-11-14
Lodariya
Rural
69
8.7
21.3
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
286
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Average Pollutant Concentration (µg/m3)
S
No
Station
Code
CPCB Norms
Sampling
Date
Sampling
Location
Area
/Category
ppm
PM10
(24hr.)
SO2
(24hr.)
NOx
(24hr)
HCs
(Grab)
NMHCs
(Grab)
CO
(8 Hrs)
VOCs
(Grab)
Industrial, Residential, Rural and Other
Area
100
80
80
NS
NS
2000
NS
Ecologically Sensitive Area
(Notified by Central Govt.)
100
30
30
NS
NS
2000
NS
2288
476
<1145
<1
920
110
<1145
<1
13
AA15
30-11-14
Lodariya
Rural
76
8.3
17.0
14
AA15
04-12-14
Lodariya
Rural
77
9.4
18.0
15
AA15
05-12-14
Lodariya
Rural
46
8.8
13.0
16
AA15
12-12-14
Lodariya
Rural
39
8.7
14.1
17
AA15
13-12-14
Lodariya
Rural
68
9.2
17.3
18
AA15
23-12-14
Lodariya
Rural
38
8.0
18.2
19
AA15
25-12-14
Lodariya
Rural
43
9.9
25.4
20
AA15
27-12-14
Lodariya
Rural
47
9.6
19.1
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
287
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 NOS. OF EXPLORATORY
WELLS IN NELP IX BLOCK CB-ONN2010/1, 6 & 9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANNEXURES
Annexure 5: Dispersion Modeling Results for Diesel Engines and D.G Sets
Emissions from the Diesel Engine were analyzed for their impact on the ground level concentration for various
distances using the dispersion modeling guidelines given by the Central Pollution Control Board, New Delhi
and the AERMOD model of the United States Environment Protection Agency (USEPA). The Ministry of
Environment and Forests approves use of these models.
Dispersion modeling for the pollutants viz SO2, Nox and Particulate Matter (PM) (Source: D.G set) was carried
out.
Assumptions:
The dispersion modeling assumptions considered are as follows:

The emission rate for the pollutant viz SO2 was calculated based on % sulphur content in Bharat IV
Diesel and PM was calculated based on % ash content in the fuel while emission rate of NOx was
calculated based on statutory norms.
The impacts of the pollutant were identified up to 3500m. The terrain of the study area was
considered as FLAT.
Stability class was evaluated based on solar isolation and cloud cover.
The mathematical equations for the dispersion modeling assumes that the earth surface acts as a
perfect reflector of plume and physic-chemical processes such as dry and wet deposition and
chemical transformation of pollutants are negligible.



Study has been conducted during post monsoon season of the year 2014. The stack emission concentrations
used for dispersion modeling were taken as per CPCB guidelines issued for conducting air quality
modeling.The site specific meteorological data such as temperature; wind speed and wind direction has been
taken from meteorological Station at Mehsana which was put up by Kadam Environmental Consultants for this
study.
Source
The source considered for emission is Diesel Engine and DG Set. Fuel used in kg/hr and emission of pollutant
in gm/sec, is given below.
Stack
Fuel
Consumption in Kg/hr
Stack Height
Diesel Engine
HSD
290
30 m (2 stacks were considered)
Stack
Pollutant
SO2
NOx
PM
Diesel Engine
Emission in gm/sec
0.008
0.86
0.008
Results
The maximum 24 hourly GLC’s are observed to be 0.065 µg/m3, 7.03µg/m3 and 0.065µg/m3 for SO2, NOx and
particulate matter respectively. These GLC’s are expected to occur at a distance of 200 m from the source
towards the SW direction.
The predicted values based on above air quality model are not likely to cause any significant change in the
existing ambient air quality of the region.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
288
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 NOS. OF EXPLORATORY
WELLS IN NELP IX BLOCK CB-ONN2010/1, 6 & 9
ANNEXURES
The results of the modeling exercise are presented in Table 1, 2 and 3. Isopleths showing GLC of PM, SO2,
NOx are provided as Figure 1a, 1b and 1c respectively.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
289
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Table 1: 24 Hour Average GLC of PM (µg/m3 )
DIRECTION
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
360
0.03
0.02
0.01
0.01
0.01
0.00
0.01
0.00
0.00
10
0.03
0.02
0.01
0.01
0.01
0.01
0.01
0.00
0.00
20
0.03
0.03
0.02
0.01
0.01
0.01
0.00
0.00
0.00
30
0.03
0.03
0.02
0.01
0.01
0.00
0.00
0.00
0.00
40
0.04
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
50
0.03
0.04
0.03
0.02
0.02
0.01
0.00
0.00
0.00
60
0.03
0.04
0.02
0.01
0.01
0.01
0.00
0.00
0.00
70
0.03
0.03
0.02
0.01
0.01
0.01
0.00
0.00
0.00
80
0.03
0.03
0.02
0.01
0.01
0.00
0.00
0.00
0.00
90
0.03
0.03
0.02
0.02
0.02
0.01
0.00
0.00
0.00
100
0.03
0.04
0.04
0.03
0.03
0.01
0.01
0.00
0.00
110
0.03
0.04
0.03
0.03
0.02
0.01
0.00
0.00
0.00
120
0.04
0.05
0.05
0.04
0.04
0.02
0.01
0.00
0.00
130
0.04
0.05
0.06
0.06
0.05
0.03
0.02
0.02
0.01
140
0.04
0.05
0.05
0.05
0.04
0.02
0.01
0.01
0.00
150
0.03
0.04
0.05
0.05
0.04
0.02
0.01
0.00
0.00
160
0.03
0.03
0.03
0.03
0.02
0.01
0.00
0.00
0.00
170
0.03
0.03
0.02
0.02
0.01
0.00
0.00
0.00
0.00
180
0.03
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
190
0.03
0.05
0.04
0.03
0.02
0.03
0.02
0.01
0.01
200
0.04
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
210
0.05
0.05
0.04
0.03
0.03
0.02
0.01
0.00
0.00
220
0.05
0.06
0.05
0.06
0.05
0.04
0.02
0.01
0.01
230
0.05
0.06
0.04
0.05
0.05
0.03
0.01
0.00
0.00
240
0.04
0.06
0.05
0.06
0.07
0.05
0.03
0.01
0.01
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
290
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DIRECTION
ANNEXURES
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
250
0.04
0.06
0.04
0.04
0.04
0.02
0.01
0.00
0.00
260
0.04
0.05
0.03
0.03
0.04
0.03
0.01
0.00
0.00
270
0.04
0.05
0.04
0.03
0.02
0.01
0.00
0.00
0.00
280
0.04
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
290
0.03
0.04
0.03
0.02
0.01
0.00
0.00
0.00
0.00
300
0.03
0.05
0.03
0.02
0.02
0.01
0.00
0.00
0.00
310
0.03
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
320
0.03
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
330
0.04
0.05
0.04
0.03
0.03
0.02
0.01
0.00
0.00
340
0.04
0.03
0.03
0.02
0.02
0.01
0.01
0.00
0.00
350
0.03
0.03
0.02
0.01
0.01
0.01
0.01
0.01
0.00
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
291
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Table 2: 24 Hour Average GLC of SO2 (µg/m3 )
DIRECTION
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
360
0.03
0.02
0.01
0.01
0.01
0.00
0.01
0.00
0.00
10
0.03
0.02
0.01
0.01
0.01
0.01
0.01
0.00
0.00
20
0.03
0.03
0.02
0.01
0.01
0.01
0.00
0.00
0.00
30
0.03
0.03
0.02
0.01
0.01
0.00
0.00
0.00
0.00
40
0.04
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
50
0.03
0.04
0.03
0.02
0.02
0.01
0.00
0.00
0.00
60
0.03
0.04
0.02
0.01
0.01
0.01
0.00
0.00
0.00
70
0.03
0.03
0.02
0.01
0.01
0.01
0.00
0.00
0.00
80
0.03
0.03
0.02
0.01
0.01
0.00
0.00
0.00
0.00
90
0.03
0.03
0.02
0.02
0.02
0.01
0.00
0.00
0.00
100
0.03
0.04
0.04
0.03
0.03
0.01
0.01
0.00
0.00
110
0.03
0.04
0.03
0.03
0.02
0.01
0.00
0.00
0.00
120
0.04
0.05
0.05
0.04
0.04
0.02
0.01
0.00
0.00
130
0.04
0.05
0.06
0.06
0.05
0.03
0.02
0.02
0.01
140
0.04
0.05
0.05
0.05
0.04
0.02
0.01
0.01
0.00
150
0.03
0.04
0.05
0.05
0.04
0.02
0.01
0.00
0.00
160
0.03
0.03
0.03
0.03
0.02
0.01
0.00
0.00
0.00
170
0.03
0.03
0.02
0.02
0.01
0.00
0.00
0.00
0.00
180
0.03
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
190
0.03
0.05
0.04
0.03
0.02
0.03
0.02
0.01
0.01
200
0.04
0.04
0.03
0.02
0.02
0.01
0.01
0.00
0.00
210
0.05
0.05
0.04
0.03
0.03
0.02
0.01
0.00
0.00
220
0.05
0.06
0.05
0.06
0.05
0.04
0.02
0.01
0.01
230
0.05
0.06
0.04
0.05
0.05
0.03
0.01
0.00
0.00
240
0.04
0.06
0.05
0.06
0.07
0.05
0.03
0.01
0.01
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
292
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DIRECTION
ANNEXURES
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
250
0.04
0.06
0.04
0.04
0.04
0.02
0.01
0.00
0.00
260
0.04
0.05
0.03
0.03
0.04
0.03
0.01
0.00
0.00
270
0.04
0.05
0.04
0.03
0.02
0.01
0.00
0.00
0.00
280
0.04
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
290
0.03
0.04
0.03
0.02
0.01
0.00
0.00
0.00
0.00
300
0.03
0.05
0.03
0.02
0.02
0.01
0.00
0.00
0.00
310
0.03
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
320
0.03
0.05
0.04
0.03
0.02
0.01
0.01
0.00
0.00
330
0.04
0.05
0.04
0.03
0.03
0.02
0.01
0.00
0.00
340
0.04
0.03
0.03
0.02
0.02
0.01
0.01
0.00
0.00
350
0.03
0.03
0.02
0.01
0.01
0.01
0.01
0.01
0.00
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
293
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
ANNEXURES
Table 3: 24 Hour Average GLC of NOx (µg/m3)
DIRECTION
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
360
2.98
2.59
1.54
0.95
0.65
0.37
0.59
0.21
0.06
10
2.98
2.18
1.32
1.25
1.30
0.79
1.01
0.50
0.33
20
3.21
2.96
1.91
1.24
1.16
0.68
0.32
0.10
0.04
30
3.65
3.64
2.42
1.59
1.11
0.34
0.12
0.05
0.02
40
3.79
4.35
3.18
2.24
1.65
0.58
0.54
0.46
0.47
50
3.54
4.66
3.28
2.25
1.62
0.55
0.29
0.12
0.05
60
3.03
3.86
2.46
1.56
1.06
0.80
0.50
0.31
0.34
70
2.98
2.87
1.96
1.27
0.85
0.72
0.44
0.13
0.05
80
2.98
3.02
2.06
1.33
0.90
0.23
0.06
0.22
0.37
90
2.98
2.73
2.44
2.01
1.71
0.73
0.26
0.06
0.02
100
2.98
3.84
3.81
3.42
3.07
1.48
0.60
0.35
0.30
110
3.61
3.87
3.44
2.77
2.30
0.96
0.37
0.08
0.03
120
4.12
5.05
5.19
4.79
3.94
1.69
0.69
0.18
0.06
130
4.34
5.88
6.77
6.45
5.63
2.75
1.70
1.69
0.86
140
4.19
5.04
5.58
5.43
4.75
2.34
0.89
0.56
0.18
150
3.70
4.09
5.70
5.30
4.39
2.00
0.97
0.42
0.22
160
3.02
3.17
3.20
2.91
2.33
1.13
0.44
0.14
0.05
170
3.00
2.90
2.37
1.73
1.25
0.34
0.08
0.02
0.01
180
3.11
4.74
3.60
2.56
1.85
1.57
0.84
0.21
0.06
190
3.74
5.33
3.95
2.77
2.32
3.24
1.96
0.87
0.72
200
4.48
4.30
3.27
2.25
1.86
1.31
0.65
0.15
0.04
210
5.18
5.47
3.96
2.76
2.75
2.12
0.91
0.23
0.07
220
5.53
6.40
4.94
6.00
5.55
4.54
2.21
0.99
0.73
230
5.29
6.18
4.61
5.58
5.27
3.00
1.30
0.31
0.09
240
4.54
6.29
5.75
6.98
7.03
5.34
2.73
1.09
0.76
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
294
EIA/EMP AND RA/DMP FOR DRILLING OPERATION OF 22
EXPLORATORY WELLS IN NELP IX BLOCK CB-ONN-2010/1, 6
&9
OIL AND NATURAL GAS CORPORATION LIMITED
DIRECTION
ANNEXURES
DISTANCE (Meters)
(DEGREES)
100
200
300
400
500
1000
2000
5000
10000
250
4.41
6.02
4.81
4.62
4.55
2.58
1.09
0.28
0.09
260
4.52
5.59
3.71
3.69
4.00
2.77
1.25
0.47
0.52
270
4.26
5.62
3.93
2.84
2.31
1.31
0.50
0.11
0.05
280
4.12
5.72
4.11
2.83
2.09
1.01
0.57
0.36
0.28
290
3.48
4.58
3.21
2.15
1.50
0.52
0.18
0.05
0.02
300
3.22
4.84
3.37
2.28
1.66
0.83
0.48
0.18
0.07
310
3.06
5.67
4.02
2.95
2.42
1.29
0.68
0.32
0.23
320
3.26
5.56
4.23
3.12
2.38
1.22
0.66
0.19
0.07
330
3.81
5.27
4.45
3.64
3.09
1.99
1.28
0.47
0.37
340
3.78
3.61
2.92
2.37
1.97
1.10
0.61
0.18
0.06
350
3.28
2.79
1.65
1.08
0.75
0.74
1.25
0.70
0.46
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
295
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Figure 1a: Concentration of PM due to Emission from Diesel Engines
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
296
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Figure 1b: Concentration of SO2 due to Emission from Diesel Engines
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
297
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Figure 1b: Concentration of NOx due to Emission from Diesel Engines
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
298
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 6: Annexure for DMP
Emergency Organization
Emergency Organization requires to be entered in the format suggested in Table1.
Table 1: Emergency organization
EMERGENCY ORGANISATION CHART
Designation
Name
Phone (O)
Phone (R)
Phone (M)
EMERGENCY CONTROL CENTRE (ECC) SITE MAIN CONTROLLER
Project Manager
OTHER KEY PERSONNEL (OKP)
Operations Manager
Safety Officer (in charge
of fire control)
INCIDENT CONTROLLERS (IC)
General Shift
Second Shift
Third Shift
Alternate
KEY WORKERS
Communications
Transport & Logistics
Maintenance
Public Relations / Liaison
Officer
Pollution Control
KEY PERSONNEL, MUMBAI OFFICE
Chairman
Managing Director
Director
EXTERNAL AGENCIES (DISTRICT LEVEL)
District Collector
Chief Fire Officer
Controller of
Explosives
Chief, Civil Defence
SP / DSP (Police)
District Health Officer
Chief Medical Officer
RO, Pollution Control
Board
District Energy
Officer
GEB Office
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
299
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
OIL AND NATURAL GAS CORPORATION
LIMITED
ANNEXURES
EMERGENCY ORGANISATION CHART
Designation
Name
Phone (O)
Phone (R)
Phone (M)
EXTERNAL AGENCIES (LOCAL LEVEL)
Sub-divisional
Magistrate
Inspector of Factories
Fire Officer
Station House Officer
(Police)
Block Development Officer
Representative,
Civil Defence
Primary Health
Officer
Editor, News paper
Village Sarpanch
Doctor, 1
Doctor, 2
Raising of Alarm
A siren system may be installed at the site, as given in Figure 1.
Figure 1: Method of Raising Alarm
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
300
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Site Layout Plan with Escape routes and assembly Points
A layout of the site is to be prepared incorporating escape routes and assembly points. Location of the
emergency control center(s) are to be marked on the map.
Emergency Control Centers
Location of ECC is to be shown on the site layout map. The items actually made available in the ECC are as
mentioned in Table 2.
Table 2: Item to be Made Available at emergency Control Center
Main ECC at -----: Phone:
Sr.
No.
1
2
3
Communication system and
emergency use items
Alternate (If Main is affected): CCR: Phone:
Number/
quantity
Communication
Sr.
No.
Communication
system and emergency
use items
5
Recording system
Number/
quantity
1. Intercom sets
1
1. Tape recorder
1
2. External phone sets
1
1
3. Telephone directory
1
2. Camera or video
recorder
4. Company Directory
1
3. Cassettes
5. List of Important phone numbers
1
6. Walkie-talkies
1
7. Wireless set
1
8. Mobile phone
1
9. Portable loud speakers
1
Documents
6
1. Site Plan
1
2. Layout plan with hazard zones,
assembly points marked and location of
siren, safety/fire system shown (Display)
1
3. Stock list of Fire extinguishers
1
4. Fire-water system and additional
sources of water
1
5. DMP Flip chart,
1
6. Copy of First Aid (Appendix-13)
1
7. List of employees and addresses and
phones,
1
8. Reference book: Manual of EHSManagement.
1
Utility items
1. Torches (Flame proof)
with Green and Red
signaling switches
2
2. Umbrellas
2
2
3. Rain coats
7
Wall display
2
PPEs
1. Site plan
1
1. Breathing apparatus
1
2. Layout plan
1
4
3. Emergency Organization.
1
2. Hydrocarbon gas asks
(Canister type)
2-Pairs
4. Emergency Phone Numbers.
1
3. Gloves
2-Pairs
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
301
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
Main ECC at -----: Phone:
Sr.
No.
Communication system and
emergency use items
4
ANNEXURES
Alternate (If Main is affected): CCR: Phone:
Number/
quantity
Sr.
No.
Communication
system and emergency
use items
Number/
quantity
Stationary
4. Gum boots
2-Pairs
1. Note pads
5
5. Goggles
2
2. Pens/pencils
5
6. Aprons
3. Erasures
5
Role of Site Main Controller
As soon as he is notified about the incident, the SMC, shall first visit the Incident site, review the actions and
proceed to the Emergency Control Center and take charge of the incident,
The SMC shall have over all responsibility for directing operations and calling outside help from Emergency
Control Center,
SMC shall assess the situation quickly and find out the level of Emergency (L1, L2, and L3) from the Incident
Controller, for:



Level 1 - EMERGENCY: May be handled with the resources available within the factory premises.
Level 2 - EMERGENCY: On-Site Emergency plan should be activated
Level 3 - EMERGENCY: Action to be taken to operate the Off-Site Emergency plan with District
Authorities.
Ensure that Key-Personnel are called-in,
Direct all Emergency Operations within the approved area with the following priorities:









Personnel Safety,
Property and Environment Safety,
Continually review & assess possible developments to determine most probable cause of events.
Check that all non-essential workers, visitors, contractors are evacuated to assembly points.
Give instructions to the Fire Fighting and rescue team,
If necessary for evacuation of the neighboring population,
Ensure that search for casualties within the affected area have been properly and timely rescued, first
aid provided & arrange for hospitalization of victims and additional help if required.
Ensure that P&A In-Charge liaise with out-side agencies such as Police, Services, District Emergency
Authorities, Collector and Deputy Director of Factories. Provide advice on possible effects to areas
out-side the factory,
Arrange for up-to-date recording of emergencies.
Role of Incident Controller
Incident Controller’s primary duty is to take charge of the scene of incident. His responsibilities / duties are as
under:

Ensure on top priority, any victims are rescued as per EER, appropriate first aid provided and shifted
to nearest doctor/hospital,
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
302
OIL AND NATURAL GAS CORPORATION
LIMITED


EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
He may be required to take decisions whether to stop or continue any process and take technical
decisions to control the incident and simultaneously inform / consult Senior Officer as per
requirement.
Immediately assess the scale of emergency likely to exist i.e. L1, L2, or L3 and take action as per the
emergency.
The Incident Controller will work under the directions of the Site Main Controller. However, till his arrival he
may have to execute the following responsibilities:


Direct for evacuation of plant and other areas likely to be affected by the Emergency.
Ensure Key-Persons are called-in.
Direct all operations within the affected area with the following priorities:








Ensure the safety of personnel.
Property and Environment.
Minimize loss of Material.
Other Emergency Services to be managed by the Incident Controller
Direct for search of casualties.
Evacuate Non-Essential workers to Assembly Points.
Brief the Site Main Controller and keep him informed about the developments.
Preserve evidences that will be necessary for subsequent inquiry in to the causes of the emergency
and deciding on the preventive measures.
Role of Fire and Safety Officer
These services are to be provided by the Chief Fire & Safety Officer, Fire Safety Officer and Assistant Fire
Safety Officer, whose roles are described.
Role of Safety Officer







On being notified about the location of fire / gas leak, he is to immediately proceed to the scene of
incident with crew.
He will position the Fire Tender at proper place depending upon the wind direction so as to ensure
safety of the crew. For gas leak, he will start fogging/fine spray jet, and for HSD fire he will start
foam,
Till the arrival of CFSO / FSO, guide the Fire Crew in Fire Fighting and rescue operation by giving
clear cut instructions.
Ensure that the crew members are provided with proper safety equipments for tackling the
Emergency.
Assessing the severity of the Incident, immediately report to Emergency Control Room
Call for additional requirement such as vehicle, equipments,
Extinguishing media or help from outside agencies.
Role of Fire Crew Members
On hearing Fire Alarm / Emergency Siren, they shall immediately report to the Fire Control Room and proceed
to the scene of the Incident and work under the direction of AFSO.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
303
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Fire Control Room Operator (Fireman)



Immediately inform to CFSO / FSO / AFSO about the incident and work as directed by them.
See that pressure in Fire Hydrant System is maintained.
Role of Pollution Control Services – Head (Environment)
After declaration of Major Emergency (i.e. L2 or L3), by the Site Main Controller he will:









He will arrange for announcements to be made to the general public in case of Level-3 Emergency.
He will co-operate with the off site emergency controller i.e. local crisis group authorities, in
evacuation and medical assistance programme.
He will arrange for the suitable treatment of wastewater and hazardous wastes generated by the
emergency control activities.
Role of Medical Services - Medical Officer
On being intimidated about the emergency, he will immediately contact the Site Main Controller.
He will render necessary treatment at the first-aid centre and nearby hospital(s).
If required, he will arrange for hospitalization and treatment of patients in outside hospitals.
He will mobilize extra medical assistance from outside, if necessary.
He will make arrangements for treating affected public (if any) with the help of the Head
(Environment)
Role of Other Medical Staff
As directed by the medical officer.
Engineering Services – Maintenance In – Charge
On hearing of the emergency siren, he will immediately contact emergency control room and arrange for
engineering services related to mechanical, electrical, instrumentation & automotive equipments such as
crane, heavy vehicle, lifting M/C & NDT services as the situation demands.


He will arrange mobile equipment like Crane, Fork Lifts, and others, if required.
He will mobilize more maintenance staff for help if required for emergency engineering work.
Welfare Services – Role of HR Personnel





He will co-ordinate the passing on of information to relatives of affected persons,
He will depute one person each, to all assembly points to carry head count of all personnel, and pass
on the information to the Chief Emergency Controller,
He will arrange the presence of company representatives at the hospital(s) to look after the needs of
the affected personnel,
He will prepare records of affected personnel noting their local and permanent address,
Arrangement of hot drinks / snacks / food as required will be carried out under his supervision.
Security Services – Role of Security In – Charge (security Officer/ Asst. Security Officer




On hearing the emergency siren, he shall find out the location of the incident (fire / gas leak / spill /
explosion) and inform the location of the same to the key personnel coming to the plant.
He will depute the security guards for manning gates and traffic control at the incident site,
He will prevent unauthorized entry in to the site
He will render assistance as demanded by the chief fire & safety officer or the fire & safety officer,
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
304
OIL AND NATURAL GAS CORPORATION
LIMITED




EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
He will mobilize additional security force for help, if required,
He will direct ambulance(s) and emergency vehicle(s) to the scene of incident,
He will help evacuate persons within the scene of incident,
As directed by the site main controller, he may be required to operate the public address (PA) system
for warning surrounding villages for evacuation.
Security Guards

On hearing the Emergency Siren, they will contact the security officer and work under his directions.
Role of Store Officer




Arrangement of additional manpower for handling store items.
Issuing of items / equipments required during emergency.
Taking immediate action of emergency procurements & arrange additional man-power for local
purchases, if required,
Co-ordination with Manager (Finance) for financial requirements.
Safe Assembly Point
The safe assembly points for the site are as mentioned in Table 3.
Table 3: Safe Assembly Points for the Site
Assembly Point No.
Location
1
Location 1:
2
Location 2:
3
Location 2:
4
Location 4:
The display provided on all safe assembly points is mentioned in Table 4.
Table 4: Scheme of Display Boards near Safe Assembly Points
ASSEMBLY POINT NO:
IN CASE OF AN EMERGENCY:
ALL NON-ESSENTIAL PERSONNEL SHALL ASSEMBLE HERE
(PROVIDED THIS ASSEMBLY POINT IS ITSELF NOT AFFECTED)
REPORT TO ASSEMBLY POINT IN CHARGE AND AWAIT INSTRUCTIONS.
INFORMATION TO BE RECORDED ABOUT EMERGENCY:
PREVAILING WIND DIRECTION: FROM
TOWARDS
(Wind orientation entry to be made by Assembly Point attendant)
Escape, Evacuation & Rescue (EER) Plan
Escape
Non-essential personnel have to escape through safe escape route towards the nearest assembly point.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
305
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Evacuation
All non-essential personnel who have assembled at the safe assembly points have to be evacuated from the
site, then noted down as part of head count and evacuated to temporary shelter outside, like nearest village
school, panchayat office or other area as previously determined.
Rescue
On receipt of Incident information, any trapped personnel have to be rescued. This requires rigorous training.
The rescuers must first ensure their own safety. There should be at least two rescuers for each victim to be
rescued. The following procedure may be followed:







Preplan the rescue operation as to who will hold shoulders and who the legs of the victim,
Ensure appropriate gas mask and other PPE is worn by each rescuer,
See the nearest windsock and approach the site of victim from upwind. If no PPE is available near by,
then take a deep breath, hold breath and approach,
Undertake rescue operation swiftly and confidently,
Check victims first needs
Impart first aid as appropriate, including CPR and oxygen breathing,
Call for ambulance and shift victim to nearest doctor/hospital.
Maximum Credible Loss Scenarios
The results of the consequence analysis lead to the possibility of the MCLS’ results to be presented in Table
5.
Table 5: Maximum Credible Loss Scenario for ONGC project site
Sr. No.
MCLS
Radial
Consequence
Distance
Damage
Thumb Rule for Identifying Stability Class
During any Hazardous gas release, the Atmospheric Stability Class plays a very important role in fatality and
injury. Information presented in Table 6: should help any one to guess fairly accurately the Atmospheric
Stability Class by looking at the time, and the sky.
Table 6: Thumb Rules for Identifying Stability Class
S.
No.
Time
Sky condition
Likely Stability Class
1
Any time of day or night
Heavy winds (>5m/s), thick clouds
(OKTAS=8)
D
2
Dawn and dusk
Clear or cloudy
D
3
Sunrise time till 10.00 AM
Clear
C
Bright and sunny, low winds
4
10 AM - 2 PM
5
10 AM - 2 PM
Bright and sunny, moderate winds
(2 m/s – 3 m/s)
A-B, B, or C
6
10 AM - 2 PM
Bright and sunny, moderate to
B, B-C or C
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
(< 2 m/s)
A, A-B or B
306
OIL AND NATURAL GAS CORPORATION
LIMITED
S.
No.
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
Time
Sky condition
ANNEXURES
Likely Stability Class
heavy winds (3 m/s – 5 m/s)
7
2 pm – 5 pm
Clear sky
B to C
8
5 PM – Sunset time
Clear sky
C
9
Dusk
Clear sky
D
10
Night
Clear sky
E-F
11
Night
Low wind (< 2 m/s)
Unconfirmed (UC)
Mutual Aid Organization
Identified mutual aid organizations are covered in Table 7.
Table 7: Identified Mutual Aid Organizations
S. No.
Mutual Aid Organization Name, Address and Name of Key
Person
Phone Nos.
1
2
3
4
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
307
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 7: Certificate of Kadam Environmental Consultants from QCI / NABET
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
308
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 8: CGWA Categorization of Talukas in Gujarat
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
309
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 9: TSDF Membership Certificates
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
310
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
311
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 10: ONGC Periodic Medical Examination Policy
Manpower in the organization is the most important resource and maintaining their health is vital for
productivity and effectiveness. As such, promotion of health of employees in the widest sense has become a
high priority goal for the organization. ONGC has formulated a policy (effective from 5th July 2007) on
Periodic Medical Examination (PME), some important features of which are detailed below:
Periodicity:
Type of PME
Employees to be covered
Periodicity
Employees upto 45 years of age
5 Years
Employees in age group of 46 to 55
years
3 Years
Employees in age group of 56 years
and above
2 Years
Specific PME
Employees having hazard based
profiles
2 Years
Intermediate PME
On need basis – upto 10% of
employees examined in a particular
year
Every Year
General PME
Scope:
PME will be conducted in two stages


Laboratory tests either in-house or at empanelled lab/diagnostic center.
Clinical examination including interview, which will include physical parameters, spirometry,
audiometry tests, flexibility test (P4), physical evaluation of male field personnel, interview to fill in
the personal and family history sheets, psychological evaluation etc.
Procedure


Medical Officer (Occupational Health) will record the pertinent findings in Periodic Medical Profile and
simultaneously in Occupational Health System. He will record these findings in a register also which is
required to be maintained in compliance with the provisions of Indian Factories Act.
MO (OH) will issue form ‘O’ required under the provisions of Mines Act 1952, certifying the fitness of
field employees to the concerned Sectional Head and the individual. A copy of the said document will
also be kept in record at the Occupational Health Center.
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
312
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
ANNEXURES
Annexure 11: Corporate Environmental Policy of ONGC
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
313
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
314
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
315
OIL AND NATURAL GAS CORPORATION
LIMITED
EIA/EMP AND RA/DMP FOR DRILLING
OPERATION OF 22 EXPLORATORY WELLS IN
NELP IX BLOCK CB-ONN-2010/1, 6 & 9
KADAM ENVIRONMENTAL CONSULTANTS | MARCH 2015
ANNEXURES
316
Kadam
Environmental Consultants
www.kadamenviro.com
Environment
for
Development
CONTACT DETAILS
Vadodara (Head Office)
871/B/3, GIDC Makarpura, Vadodara, India – 390 010.
E: [email protected]; T:+91-265-3001000; F: +91-265-3001069
Delhi / NCR
th
Spaze IT Park, Unit 1124, 11 Floor, Tower B-3, Sector 49, Near Omax City Centre Mall,
Sohna Road, Gurgaon – 122 002 (Haryana).
E: [email protected]; T/F : 0124-4030873; M:+91-98998-04300