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City of Fort Worth Pretreatment Services

Year Submitted: 2011

Process: Sanitary Sewer System

Industry: Water Utilities

Wastes Reduced: FOG (Fats, Oils, and Grease)

Location: Fort Worth TX

No. of employees: 6

Contact: Alphonse Newton

Phone: 817-392-8305


Fats, oils and grease discharges from Food Service Establishments (FSEs) were identified as a major source of overflows, stoppages, obstructions and odor problems in the city's wastewater collection system, by then PSD Manager Sebastian Fichera and now Assistant Water Director. He laid the frame work for the Waste Hauler and Restaurant Program (WHARP) in 1997 to address these concerns. In 2009, the FOG program prevented an estimated 24.5 million pounds per year of grease and 12 million pounds of grit from entering the sewer collection system. In 2010, approximately 50 million pounds of grease trap waste was removed from FSEs. The number of grease-related sanitary sewer overflows has been dramatically reduced by almost 95% between 1994 and 2009.

P2 Application:

The city began permitting grease trap waste haulers in 2001 to account for the volume of grease trap/interceptor wastes hauled and disposed, thereby reducing illegal dumping of the wastes into the city sewer or elsewhere. The city developed and implemented the "Grease Trap-Interceptor Guidance Document" to implement a new policy that requires grease traps/interceptors to be permitted and designed according to objective criteria. The permitting program for all FSEs was phased in over several years. Between 2001 and 2004, 2,100 sets of plans were reviewed which resulted in 480 grease traps/interceptors being installed. Many FSEs were found to have inadequately sized traps/interceptors. The average size of new installations is now 1,500 gallons. FSEs are required to pump grease traps/interceptors once every 90 days or more often if necessary. The city conducts monthly informational seminars/workshops for targeted establishments to teach best management practices in order to reduce the amount of FOG going down the drain and to improve grease trap performance. The city takes appropriate enforcement by issuing Notice of Violations, scheduling Show Cause Hearings and establishing Compliance Schedules to bring facilities into compliance, as required when FSE fail to attain compliance or reduce FOG discharges into the collection system.

Details of Reductions

  • 24,500,000.0 - lbs of   Grease
    Comments: Amount collected in 2009
  • 12,000,000.0 - lbs of   Grit
    Comments: Amount collected in 2009
  • 49,200,000.0 - lbs of   Grease
    Comments: Amount collected in 2010

Additional Information :

The program has about 2,000 permitted FSEs and most do their part to reduce FOG discharges into the collection system. The program has been phased in over time and has resulted in less FOG loading on the citys Village Creek Wastewater Treatment Plant, reduced the number of blockages and sanitary sewer overflows, and improved public relations. The cost of implementing the program is about $300,000 per year which includes the cost of 6 staff. The program is funded by permitting fees. The city expects more improvements as the program matures.

Source: TCEQ

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