Fats, Oil, & Grease Discharge

Some commercial establishments generate varying amounts of materials that can be harmful to the sewage collection and treatment system. These materials include fats, oil and grease (FOG), sand, and other contaminants. FOG is primarily discharged by food service establishments because it coats equipment like pots, pans, and utensils and is discharged into the sewer system during washing. When this equipment is washed, FOG is rinsed into the sanitary sewer system.

The Interceptor Sizing Worksheet is a sizing chart that can help a commercial establishment determine the size for the required Grease Interceptor. The minimum size grease interceptor that the City allows is 20 gallons or 20 pounds of grease capacity. Capacities vary by manufacturers, so choosing the best unit for your application is a business decision.

Other facilities, such as car washes and vehicle maintenance facilities produce oil and sand. Sanitary sewer systems that are impacted by high amounts of FOG and sand are susceptible to backups and additional maintenance costs. The FOG discharge permit policy will help commercial establishments minimize and/or eliminate the amount of FOG and sand entering the sewer system by providing requirements for proper disposal. Proper disposal can be achieved by installing grease interceptors, grease traps, sand/oil separators and grease dumpsters.

Wastewater Discharge Questionnaire

A discharge questionnaire is also available for completion for businesses or industries in Bonner Springs. The Utilities Department may require a discharge water sample to be taken to analyze if heavy metals or chemicals may be present.