APPENDIX E – RULES AND REGULATIONS
OIL, GREASE AND/OR SAND INTERCEPTOR MAINTENANCE PROCEDURE

1.1 INTERCEPTOR INSTALLATION CRITERIA

Grease trap interceptors are required for all facilities used and operated regularly for the sale of prepared food, including but not limited to restaurants, cafes, fast food outlets, pizza outlets, delicatessens, sandwich shops, and any and all other kinds and types of food vending establishments in which any food preparation (including heating or defrosting in or by means of any kind of oven or heating device) takes place on the premises, whether or not such facilities are located in a separate building or structure or occupy space in a building or structure that is occupied by other businesses, as well as schools, churches, boarding houses with communal kitchen facilities, nursing homes, and day care centers which have kitchens and engage in the preparation of food.  In addition, meatcutting facilities and others capable of discharging significant amounts of grease into the District sanitary sewer collection system shall be required to install grease interceptors.  The exception shall be those facilities granted a variance by the District.  Grease interceptor shall not be required for private residences or dwelling.

1.2 INTERCEPTOR SIZING CRITERIA

All property owners discharging to the District wastewater treatment plant shall comply with the District procedure for interceptor sizing criteria (See Article 9C of the Rules and Regulations). 

1.3 INSPECTION OF INTERCEPTORS

Property owners within the District shall establish an inspection program for the interceptor.  The District will develop a mechanism to inventory all interceptors in its service area and document the inspections and maintenance of these interceptors.  Once the interceptors in the service area are identified, the interceptor will be classified into two (2) categories:

• Problem or Significant Interceptors
  The facilities connected to these interceptors contribute significant amount of animal/vegetable oil, grease and/or sand to the sewer system.  These interceptors will need to be inspected at a frequency of every three (3) to six (6) months.

• Nonsignificant Interceptors
  The facilities connected to these interceptors do not contribute significant amount of animal/vegetable oil, grease and/or sand to the sewer system.  These interceptors will be inspected at a frequency of every six (6) to twelve (12) months.

1.4 INTERCEPTORS PUMPING SCHEDULES

Initially, all Users connected to interceptors will be required to pump out their interceptors quarterly or every three (3) months.  Inspection of the interceptors by the District and/or review of  “Certificates of Maintenance” received by the District will determine if this frequency needs to be increased to control the amounts of oil, grease and/or sand entering the sewer system or if the pumping frequency can be decreased.

1.5 BIOLOGICAL TREATMENT

Biological treatment shall not be a substitute for the pumping of grease type interceptors at the frequency determined by the District.

1.6 EXISTING SOURCES NOT CONNECTED TO INTERCEPTORS

Existing sources not connected to interceptors and which contribute significant amounts will be identified through inspection of the collection systems by the District.  Once these sources are identified, they will be required to implement Best Management Practices (BMPs) to keep oil, grease and/or sand out of the sanitary collection system.  Examples of BMPs include:

1. Scrape food from plates into a garbage can
2. Prewash plates by spraying them off with cold water over a small mesh catch basin positioned over a drain.  This catch basin should be cleaned into a garbage can as needed
3. Pour all liquid oil and grease from pots and pans into a waste grease bucket stored at the potwashing sink.  Heavy solid buildup of oil and grease on pots and pans should be scraped off into a waste grease bucket
4. Other kitchen practices identified by the District and/or facility, which will decrease the point source discharging of oil and grease.

If the BMPs are not successful at the facility and the facility continues to contribute significant amounts of oil, grease and/or sand to the sewer, as documented by field inspections, then the facility will be required to install an adequately sized interceptor.