Storm Water Quality Management
Building Non-Structural Best Management Practices
David Batts Jr., LEED AP
Market Development
What We Do
▫ Innovative Permanent Storm Water Quality
Solutions
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Cost Effective Underground Detention
Water Harvesting Solution
Treat Entire Flow
Eliminate Bacteria Concerns
▫ Permanent Slope and Channel
Stabilization
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99.9% Erosion Control Effectiveness
Green Armor in place of concrete
▫ Storm Water Pollution Prevention Solutions
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Storm Water Pollution Plans Outsourcing
Innovative Best Management Practices
Compliance Assurance Program for General Contractors
Storm Water Quality Management
Agenda
Importance of Reducing the Impacts of Storm Water Runoff
Low Impact Development Introduction
Design and Construction Ideas for Non-Structural BMP’s
Why LID is Important
Property development leads to increased runoff.
Collect.
Convey. Discharge.
Polluted
Outfalls
Centralized
Control.
Urban
Flooding
Storm
Water
Disposal
Severe
Erosion
Groundwater
Loss
Conventional
Development
Centralized
Pipe and Pond
Control
Run-off Hydrograph
The
high price of efficiency
2001 Tropical Storm Allison
1915 Predevelopment Response
What is Low Impact Development?
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Low Impact Development
(LID) is a storm-water
management strategy that
decentralized controls and
on-site features to closely
mimic the pre-developed
condition of the site.
What’s Attractive About LID?
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Universally applicable
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arid, clays, karst, cold, coastal, etc.
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Economically sustainable
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Ecologically sustainable
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Silent on growth management
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Ideal for new development or urban retrofit
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Common sense approach
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Pollution prevention
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Public acceptance
LID Benefits
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Reduced infrastructure cost for detention ponds, curbs, gutter,
inlets and pipes
Increase in commercially viable land
Enhanced property values and redevelopment potential
Energy and potable water cost savings
Enhanced ‘quality of life’ and aesthetics
Greater marketability and valuable market positioning edge for
owners
Ease burden on local development support entities
Conventional Site Design
LID Design?
Multiple Systems
LID Development
Conservation
Minimization
Soil Management
Open Drainage
Rain Gardens
Rain Barrels
Pollution
Prevention
Disconnected
Decentralized
Distributed
Multi-functional
Run-off Hydrograph
Conventional vs. LID
2001 Tropical Storm Allison
1915 Predevelopment Response
Efficient Storm Water Design
LID Condition
Micro Detention
▫ Bio-retention
▫ Rainwater Harvesting
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Bio-swales
Rain Gardens
Roof Gardens
Permeable Paving
Planter Boxes
Micro Retention
Pollutant Removal
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TSS - 95%
Heavy Metals - 99%
Oil and Grease - 95%
Total Phosphorous - 80%
Total Nitrogen - 40%
Coliform - 80%
Treat over 90% of total volume in less than 1% of the
urban landscape.
How LID Affects the Environment
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Hydrological Advantages
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Increase the Sponge Factor
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Replicates natural hydrologic cycle
Increase groundwater recharge
Manage storm water rather than dispose of it
Create or restore pre-development runoff numbers
Enhance flood resistance
Create Opportunities for Storm Water Reuse
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New technologies enable LID tools to be used to passively clean and
reuse storm water
DESIGN
&
CONSTRUCTION
2000 Maryland Stormwater Design Manual. Vol.I & II
www.mde.state.md.us
How can we slow down the time of concentration, allow evapotranspiration to
take place, and mimic the predevelopment hydrologic cycle?
Types of BMP’s
Pollutant Removal
Types of BMP’s
Dry Pond
Types of BMP’s
Sand Filter
Types of BMP’s
Bioretention
Types of BMP’s
Dry Swale
Types of BMP’s
Dry Swale
All green space can be designed to be hydrologically functional and treat runoff.
1: Initial Architect’s Concept
Centralized
Control Pond
2: Revised Concept
Reduced lawn,
pulled in fields,
redesigned
parking area.
3: Low Impact Design
Multifunctional Use
of Landscape and
Infrastructure
Outdoor Classroom
Student Gardens
Decentralized Controls
Roofs
Parking Lots
Open Drainage
Rain Barrels
Open Space
Turf
Educational components
RESULT: 5 Acres of Trees Saved
Retaining Walls Minimize Grading
Extensive Use of Native Plants
Existing Vegetation Preserved
Outdoor Classroom
Path to Undeveloped Woods / Stream
Rain barrel for watering student garden
LID Summary
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LID paradigm is storm water management rather than storm
water disposal
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LID is Simple and Effective
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LID is Economical
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LID strategies integrate green space, native landscaping and natural hydrological
functions to mimic nature
Costs less than conventional storm water management systems to install and
maintain
LID is Flexible
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LID offers a wide variety of structural and non-structural techniques to reduce
runoff speed and volume and improve water quality
Visit: www.lowimpactdevelopment.org for more information
Massachusetts Institute of
Technology Stata Building
Infiltration Modules
Single Module
Double Module
Triple Module
Size:
Size:
Size:
(W) 16.06”
(W) 16.06”
(W) 16.06”
(L) 26.97”
(L) 26.97”
(L) 26.97”
(H) 17.72”
(H) 34.65”
(H) 51.57”
Volume: 33.031 gallons
Volume: 65.085 gallons
Volume: 88.135 gallons
How Much Water is Stored?
How Much Water Do You Need to Store?
Commercial WSUD/LID
Urban Parking Lot Case Study
English + Associates
Owner
Architect
Construction EcoServices
Storm-water Tank Contractor
General Contractor
T&T Construction
Case study of an Urban Site
Site Specific
Problems
1. Existing surface conditions did not
mitigate storm water by percolation
or retention.
2. Presence of expansive clay soils
posed a danger to foundation of
the adjacent building.
3. Adjacent historical building has a
basement which suffers occasional
flooding due to underground
hydrostatic pressure.
▫ Parameters
▫ Parking lot with 23 spaces
▫ 100’ x 100’ Lot – 10,000SF
▫ Conditions
▫ Crushed gravel Parking lot
▫ Age: 40-50yrs
▫ Goals
▫ To provide adequate, smooth
parking for office
▫ To mitigate storm water run-off
▫ Provide green space
▫ Retain storm water for irrigation
1919 Decatur Parking Lot
How we fit it in
Design
superimposed
over original
parking lot
Î
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Î arrows reflect
Î
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Design of
underground
water retention
and water inlets
Î
ATLANTIS
RAINTANKS
direction of water
flow
Breaking Ground –
Basic Drainage slope
Breaking Ground
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain
Tanks
Excavation
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture
goes on the bottom of the pit
as leveling material
Sand-Gravel Layer
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat
on a truck bed to be
assembled onsite.
Shipment of Tanks
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and
simple.
Assembly
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
A fabric layer to protect the
impermeable layer
EcoFabric Liner
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the
side and bottom of the tank to
keep the water from seeping
into the soil
Impermeable Layer
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the
Geotextile fabric.
Liner Wrap
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the Eco fabric.
Placement of the Atlantis Rain
Tanks
Tank Sequence
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the Eco fabric.
Placement of the Atlantis Rain
Tanks
Sand is compacted 2 feet
along the perimeter of the
tank.
Compacted Sand
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the Eco fabric.
Placement of the Atlantis Rain
Tanks
Sand is compacted 2 feet along
the perimeter of the tank.
The D-Cells convey filtered
water from gravel beds to
tank
D-Cells Water Inlet
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the Eco fabric.
Placement of the Atlantis Rain
Tanks
Sand is compacted 2 feet along
the perimeter of the tank.
The D-Cells convey filtered water
from gravel beds to tank
Concrete placement
Concrete Placement
Breaking Ground –
Basic Drainage slope
Excavation of pit for Rain Tanks
A gravel and sand mixture goes
on the bottom of the pit as
leveling material
Atlantis Rain Tanks Ship flat on a
truck bed to be assembled
onsite.
Assembly is timely and simple.
Added a fabric layer to protect
the impermeable layer
An impermeable layer at the side
and bottom of the tank to keep
the water from seeping into the
soil.
Another layer of the Eco fabric.
Placement of the Atlantis Rain
Tanks
Sand is compacted 2 feet along
the perimeter of the tank.
The D-Cells convey filtered water
from gravel beds to tank
Concrete placement
Completed Pavement
After
Before
COST
COMPARISON
Total
Conventional
Development
($)
Low Impact
Development
($)
41,500
33,000
We Are Storm Water Quality Specialists
We can help you deal with storm water quality challenges
www.ecosvs.com
832.456.1000