1. home and garden
2. home furnishings
3. lamps and lighting

Why Regulate FOG?
Federal pretreatment regulations
• 403.5 National pretreatment
standards: Prohibited discharges.
• (b) Specific prohibitions. In addition, the
following pollutants shall not be introduced
into a POTW:
– (3) Solid or viscous pollutants in amounts
which will cause obstruction to the flow in the
POTW resulting in Interference;
Regulating FOG –
An Industrial Waste Approach
King County Industrial Waste (KCIW)
Program
2013 NW FOG Forum
Content
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Industrial Waste Program Overview
King County Regulation(s) & FOG
Types of FOG
KCIW Toolbox for handling FOG issues
Sampling and Monitoring
Summary
King County Industrial Waste Program
• Federally delegated industrial pretreatment
program
• 1969 Program inception
• Permits, inspections, monitoring, enforcement
Industrial Waste Objectives
• Protect Treatment Plant Workers
• Protect Wastewater Treatment Plants &
collection system
• Protect Puget Sound Water Quality
• Prevent Contamination of Biosolids and
Reclaimed Water
• Cost Recovery
King County Industrial Waste Program
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389 Miles of sewer
5 Treatment Plants
120 Permits
13 Food Producers with FOG
2 Pick up and Pre-treat FOG
Program staff- 18 employees
King County Wastewater
Treatment Division Facts
• 34 local sewer agencies (cities &
sewer districts)
• 420 square miles
• 1.5 million people
• 3 Regional plants (West & South
Plants) and (Brightwater)
• 2 local plants (Carnation & Vashon
Island)
• 42 Pump Stations
• 389 miles of conveyance lines with
diameters ranging from 6 inches
to 17 feet
• 38 Combined Sewer Overflows
(CSO’s) and 4 CSO treatment
facilities
• Average 175 million gallons per
day (MGD) treated wastewater
FOG Regulations
• KC Code
• Local Limits
King County’s Local Limits
FOG Accumulations and Obstructions
6.1.6 Fats, Oils, and Grease (FOG)
6.1.6.1 FOG Accumulations and Obstructions
Discharges of FOG shall not result in significant
accumulations which either alone or in combination with
other wastes are capable of obstructing flow or that interfere
with the operations or performance of sewer works or
treatment facilities.
King County Local Limits
• 6.1.6.3 Polar FOG (animal and vegetable)
Dischargers of polar FOG shall minimize free
floating polar FOG. Dischargers may not add
emulsifying agents exclusively for the purposes
of emulsifying free floating FOG. Companies
which discharge free floating polar FOG will be
required to complete, for King County review
and approval, a FOG control plan as outlined in
Section 6.1.6.4.
Types of FOG We Regulate
• Polar
• Non-Polar
How to remember which is which
• Think polar bear =polar (animal) FOG
King County’s Local Limits
Mineral or petroleum FOG
• Non Polar FOG Limit: 100 mg/L
• Companies which violate the non polar
FOG limit may be required to complete …a
FOG control plan…
•FOG dischargers that KC IW regulates:
–Food processors: dairies, fish processors,
bakeries, meat processors, ice cream
manufacturers, specialty foods, etc.
•FOG dischargers that KC IW does not
regulate:
–Restaurants, cafeterias,
residences
Our FOG Toolbox
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Fog Control Plan(s)
BMPs/Housekeeping
Working with LSAs
Enforcement Actions
FOG Control Plans
The goal of the FOG control plan is to implement
reasonable and technically feasible controls of
free floating FOG.
The basic components of the FOG control plan
should include:
1. A written policy
2. Facility description
3. Quantities of FOG in and out.
4. Schematics of process areas
FOG Control Plans (Cont)
5. Current reduction, recycling, and treatment
activities.
6. Reduction opportunities selected,
process(es) affected, and estimated
reductions
7. Performance goals
and schedule.
FOG Control: BMPs/good housekeeping
• Scrape excess
food from cooking
vats
• Scrape/Squeegee
food from floor
• Screens on drains
¼ screen on trench drains
FOG source: excess cooking grease
FOG control: grease strainers
Remove solids
Remove solids
FF FOG Collection
Don’t Forget those Inside traps!
KCIW FOG Sampling & Monitoring
• SIU monitoring
– Free-Floating Fog
– Non-Polar FOG
1.
Scope and Application
This Standard Operating Procedure (SOP) applies to the
field measurement of free-floating polar fats, oils, and
grease (FF-FOG). Industrial Waste Program staff and
industrial dischargers use the technique.
2.
Method Summary
The technique uses a 1-liter volumetric flask to provide a
quantitative measurement of the volumetric concentration
of FF-FOG in the wastewater discharge.
How much FF-FOG is that?
Continuing practices to reduce FOG
Do’s and Don’ts
– Do BMPs/Good Housekeeping
– Do regularly service traps and interceptors
– Do your FF FOG monitoring
– Don’t ignore permit requirements
– Don’t neglect Pre-treatment system maintenance
– Don’t emulsify
If You Don’t Control FOG?
An Expensive Lesson
River of Raw Sewage!
Flowing Through A House!
Thank you
Questions?