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?