Fats, Oil and GreaseBeautiful Downtown Burbank
Presenters: Juan Gonzalez, and Stacey ChristianSupport: Randy Mark
Fats, Oil & GreaseCollection System & POTW
ImpactsCMOMPOTW
Environment
Background Fats, Oil, and
Grease, also called FOG in the wastewater business can have negative impacts on wastewater collection and treatment systems.
CommercialCommercial
ResidentialResidential
IndustrialIndustrial
Wastewater Treatment PlantWastewater Treatment Plant
What is FOG? Comes from food sources:
animal and plant Compound fatty acids and
glycerol Large O&G molecules are
>150 microns (when free floating)
Hydrophobic – insoluble in water
Hardens and accumulates in sewers – Results in Blockages
Processes that generate FOG Food Preparation Cooking Baking Frying with Oil Cleaning Utensils,
Dishes, Pots & Pans
Cleaning of Floors
Blockages Blockages Result
in: Sewer spills Manhole overflow Sewage back-ups
in homes or businesses
Sewer Spills, Overflows and Back-Ups
Sewage spills, overflows, and back ups occur when wastewater being transported through underground pipes overflows through a manhole, cleanout, or broken pipes. Sewage spills can potentially cause health hazards, cause damage to homes and businesses, and threaten the environment, local waterways, and beaches.
Beautiful Downtown Burbank
City Crew Report-Areas of Heavy & Medium Grease
Inspection of Grease Trap
Inspection of Grease Interceptors
Grease Interceptor Overflow
Investigation Findings Improperly sized
interceptors Nonfunctional
Interceptors Poor Operation and
Maintenance Lack of Service Adding Enzymes
Lack of Interceptor Lack of
Understanding
Enforcement Cite 40 CFR 403.5
…Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in interference…
BMC 25-107 …clarifiers….shall be
maintained in good operating condition and in conformity with applicable law by the owner of the property…
Solutions Train Inspectors Implement Grease
Interceptor Maintenance Plan
Include Interceptor Maintenance in Control Mechanism
Outreach BMPs
Solutions-Performance Standard
Inspect Grease Interceptor
Interceptor Maintenance Plan Location of Interceptor Interceptor Maintenance
Frequency Person Responsible Rendering Company Past History Compliance Criteria Problem Notification Log
Evaluation – How do we know it’s working?
Reports of O&G in City Lines
0
1
2
3
4
5
6
7
1999 2000 2001 2002 2003
Year
Nu
mb
er
of
O&
G r
ep
ort
s
Medium Grease
Heavy Grease
Questions?
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