Commercial Grease Trap Sewer Use Ordinance

Excerpt from the City of Fayetteville Sewer Use Ordinance regarding Grease Trap Requirements

Section 28-85 Grease and Oil Removal
(a)Grease traps shall be provided at the user’s expense, when such user operates an establishment preparing, processing or serving food and/or food products; except that such interceptors shall not be required for private living quarters or dwelling units. At a minimum, all food preparatory sinks, dishwashers, etc., shall be connected to the trap or interceptor. Any sink equipped with a waste grinder or any plumbing fixture not associated with food preparation should not be connected to the trap or interceptor.

(b)All interceptors shall be of a type and capacity accessible for cleaning and inspection and shall meet the minimum design criterion in the PWC design specification manual. All such traps or interceptors shall be serviced and emptied of the waste content as required in order to maintain their minimum design capability to intercept oils and greases from the wastewater discharged to the public sewer, or to achieve compliance with the oil and grease limit of 250 mg/l as regulated in section 28-75. For grease traps, the service shall be completed and documented at an interval not to exceed 60 days unless approval is obtained in writing from PWC. PWC may require more frequent cleaning as deemed necessary.  For under-the-sink interceptors, the service shall be completed and documented daily or at a frequency recommended by the manufacturer. If an under-the-sink interceptor is not serviced daily, it shall be the responsibility of the user to demonstrate compliance with the oil and grease limit.

(c)Users who are required to pass water through a grease trap or similar interceptor will provide for a minimum hydraulic retention time of 24 minutes at actual peak flow between the influent and effluent baffles with 25 percent of the total volume of the grease trap or interceptor being allowed for any food-derived solids to settle or accumulate and floatable grease-derived materials to rise and accumulate.

(d)Where installed, all traps or interceptors shall be maintained by the user at his expense in continuously efficient operation at all times.  Users shall maintain a written record of grease trap or interceptor maintenance for three years.  All such records shall be available for inspection by the PWC at all times.  These records shall include:

(1) Food Service Establishment name and physical location
(2) Date and time of grease trap or interceptor maintenance
(3) Name of third party service provider
(4) Name and signature of third party service provider company agent performing service
(5) Number and size of each grease trap or interceptor serviced at site
(6)  Approximate volume of waste removed from each grease trap or interceptor
(7) Destination of removed wastes
(8) Such other information as required by the PWC General Manager

(e) During trap maintenance, all inorganic and organic solids shall be removed from the sludge pocket. In addition, all floating material shall be skimmed from the trap or basin tank to avoid accumulation of scum covering the surface of the liquid. There shall be no reintroduction of the water removed from the trap either to the trap itself or to the municipal wastewater system without prior written approval from the PWC. The user shall be responsible for the removal and disposal by appropriate means of the captured material in accordance with local regulations.

(f) The user shall maintain a written record on the site, of trap or interceptor maintenance, for three years.

(g) The PWC General Manager may, at his discretion, require permitting of third party service providers, i.e., any third party not in the employement of a food service establishment who perform trap maintenance to include removal of grease and/or solids on a grease trap or interceptor connected to the PWC sewer collection system, to obtain a Grease Trap Pumping Permit from the PWC.  This permit will include requirements for providing such services to establishments discharging into PWC’s sewer collection system.  The permit may include but not be limited to submission of a permit application with documentation of a legal disposal option for any waste removed from grease traps and the number and size of any trucks used to remove grease from grease traps on PWC’s sewer collection system.  The permit may include but not be limited to requirements for submittal of documentation of any traps that are maintained on the PWC sewer collection system as well as the date, time, approximate amount (per best professional judgement of third party service provider) of waste removed , and destination of removed wastes.