FOG Fats, Oils,

1
FOG(Fats, Oils, Grease)

• The Role of FOG in Sewer System Management
• Robin B. Hamers, P.E.
• Manager/District Engineer
• Costa Mesa Sanitary District
• September 2008

2
Ocean Water Pollution

• Causes
• Contaminated Urban Water Runoff
• Sanitary Sewer Overflows (SSOs)
• Action By
• EPA Clean Water Act
• Orange County Grand Jury
• State Water Resources Control Board (SWRCB)

3
Causes of Sanitary Sewer Overflows (SSOs)

• Grease
• Roots
• Structural Problems
• Mechanical Failure in Pumping Stations
• Other
• Grease Accumulation
• Clean Sewer Main

4
Santa Ana Region of SWRCB (Mid Northern O.C.)

• Waste Discharge Requirements (WDR)
• Order No. R8-2002-0014 April 26, 2002
• Requires Sewer System Management Plan (SSMP)
• Monitoring Reporting
• Emergency Response Plan
• Preventative Maintenance Program
• Legal Authority
• Fats, Oils, Grease Control Program
• Capacity Assurance
• Rehabilitation Program

5
SWRCB

• Statewide Waste Discharge Requirements (WDR)
• Order No. 2006-0003-DWQ
• May 2, 2006
• Currently being implemented by Agencies in
  California

6
Managing FOG

• National FOG Studies by EEC
• Phase I Building Blocks Approach
• Phase II Testing Additives Interceptors
• Conclusion Gravity Interceptors are the Best
  Available Technology at this
  time.

7
Interceptors

• Gravity Interceptors 750 gallon or larger
  three compartment
• vault located in parking lot. Works on
  the principal of grease floats and grit
  sinks.
• Hydromechanical Interceptors Formerly termed
  Grease Traps, are
• smaller indoor grease capturing
• devices. Works on same principal.

8
A Successful FOG Control ProgramBuilding Blocks

• Ordinances
• Monitoring Enforcement
• Kitchen BMPs
• Interceptors
• Characterization
• Additives (Enzymes and Bacteria)
• Enforcement
• Education Outreach
• Sewer Line Cleaning
• Program Costs Fees

9
Types of FOG

• Food Service Establishments (FSEs)
• Restaurants, schools, hospitals, colleges, etc.
• Any place with hot food preparation.
• Residential FOG
• Single Family Residential
• Multi-Family Residential
• 6-25 Unit Complexes
• Other