(A) General provisions.
(1) No user shall allow wastewater discharge concentration from subject grease interceptor to exceed 325 milligrams per liter, as identified by method EPA Method 1664 or 275 milligrams per liter, as identified by EPA method 413.
(2) All grease interceptors shall be of a type, design and capacity approved by the superintendent or his or her designee and shall be readily and easily accessible for user cleaning and village inspection.
(3) All the grease interceptors shall be serviced and emptied of accumulated waste content as required in order to maintain minimum design capability or effective volume of the grease interceptor.
(4) Users who are required to pass water through a grease interceptor shall:
(a) Provide for a minimum hydraulic retention time of 24 minutes at actual peak flow or 12 minutes at the calculated theoretical peak flow rate as predicted by the Uniform Plumbing Code fixture criteria, between the influent and effluent baffles with 20% of the total volume of the grease interceptor being allowed for sludge to settle and accumulate, identified hereafter as a “sludge pocket;”
(b) Understand and agree that: no person shall introduce, nor allow the introduction of physical, chemical or biological agents into grease traps for the purpose of resuspending dissolving, emulsifying or rendering soluble any fats, oils or grease removed from waste water by the grease traps and reintroducing them into the village sewer system. Enzymes, emulsifiers and any other inhibitors are prohibited;
(c) Understand and agree that: wastewater in excess of 140°F shall not be discharged into a grease trap;
(d) Operate the grease interceptor in a manner so as to maintain the device such that attainment of the grease limit is consistently achieved. CONSISTENT shall mean any wastewater sample taken from the grease interceptor shall be subject to terms of numerical limit attainment described previously. If an establishment desires, because of documented space constraints, an alternate to an out-of-building grease interceptor, the request for an alternative location shall contain the following information:
1. Location of village sewer main and easement in relation to available exterior space outside building; and
2. Existing plumbing at or in a site that uses common plumbing for all services at that site.
(e) Understand and agree that: the use of automatic grease removal systems is conditionally permissible, upon prior written approval by the Superintendent, and the Cattaraugus County Department of Health. Any establishment using this equipment shall operate the system in such a manner that attainment of the grease wastewater discharge limit, as measured from the unit’s outlet, is consistently achieved;
(f) Understand and agree that: no person shall deposit or discharge into the village sewers any fats, oils and grease which have been removed from a grease trap or sewer system outside the village; and
(g) Understand and agree that: the Superintendent reserves the right to make determinations of grease interceptor adequacy and need, based on review of all relevant information regarding grease interceptor performance, facility site and building plan review and to require repairs to, or modification or replacement of the traps.
(B) (1) The user shall maintain a written record, on forms provided by the village, of trap maintenance for three years. All records shall be kept in a conspicuous location and shall be available for inspection by the village at all times.
(2) The user shall submit maintenance records to the village on a biannual basis (twice per year). Records shall be submitted by March 1 and October 1 of each year. The records shall be submitted to the Superintendent of Public Works. The Superintendent or designee will make quarterly and periodic inspections of facilities.
(C) No non-grease laden sources are allowed to be connected to sewer lines intended for grease interceptor service.
(D) Except as provided herein, for a period of one year following adoption of this subchapter, although installation of grease interceptors will be required to be installed, no enforcement actions will be taken under this subchapter for failure to achieve limits on grease discharges from grease interceptors. If, during this one-year period, an obstruction of a village sewer main(s) occurs that causes a sewer overflow to the extent that an impact on the environment is realized and that the overflow or failure of the sanitary sewer collection system to convey sewage can be attributed in part or in whole to an accumulation of grease in the village’s sewer main(s), the village will take appropriate enforcement actions.
(E) Access manholes, with a minimum diameter of 24 inches, shall be provided over each chamber and sanitary tee. The access manholes shall extend at least to finished grade and be designed and maintained to prevent water inflow or infiltration. The manholes shall also have readily removable covers to facilitate inspection, grease removal and wastewater sampling activities.
(Ord. 2-2007, passed 2-12-2007)