(A) Grease interceptors shall be installed by users as required by the Director of Public Works or his or her designee. Grease interceptors shall be installed at the user’s expense, when such user operates a cooking establishment. Grease interceptors may also be required in non-cooking or cold dairy and frozen foodstuff establishments when they are deemed necessary by the Director of Public Works for the proper handling of liquid wastes containing grease. All grease interceptors shall be of a type, design and capacity approved by the Director of Public Works or his or her designee and shall be readily and easily accessible for user cleaning and town inspection. All such 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, but not less often than once every other month. Users who are required to, based on solids, pass water through a grease interceptor shall:
(1) 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”;
(2) Remove any accumulated grease cap and sludge pocket as required, but at intervals of not longer than every other month at the user’s expense. Grease interceptors shall be kept free of inorganic solid materials such as grit, rocks, gravel, sand, eating utensils, cigarettes, shells, towels, rags and the like which could settle into this pocket and thereby reduce the effective volume of the grease interceptor;
(3) Accept the following conditions: if any skimmed or pumped wastes or other materials removed from the grease interceptor are treated in any fashion onsite and reintroduced back into the grease interceptor as an activity of and after said onsite treatment, the user shall be responsible for the attainment of established grease numerical limits consistent with and contained in division (A) above on all discharges of wastewater from said grease interceptor into the town sanitary sewer collection and treatment system;
(4) Operate the grease interceptor in a manner so as to maintain said device such that attainment to the grease limit is consistently achieved. CONSISTENT shall mean any wastewater sample taken from said grease interceptor shall be subject to terms of numerical limit attainment described in division (A) above. 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:
(a) Location of town sewer main and easement in relation to available exterior space outside the building; and
(b) Existing plumbing at or in a site that uses common plumbing for all services at that site.
(5) Understand and agree that the use of biological additives as a grease degradation agent is conditionally permissible, upon approval by the Director. Any establishment using this method of grease abatement shall maintain the trap or interceptor in such a manner that attainment of the grease wastewater discharge limit, as measured from the trap’s outlet, is consistently achieved;
(6) Understand and agree that the use of automatic grease removal systems is conditionally permissible, upon prior written approval by the Director, County Plumbing Inspector of the town and the 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; and
(7) Understand and agree that the Director 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 such traps.
(B) The user shall provide a written record of maintenance to the Director for three years. All such records will be available for inspection by the town at all times.
(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 interceptors. If, during this one-year period, an obstruction of a town sewer main(s) occurs that causes a sewer overflow to the extent that an impact on the environment is realized and that said overflow or failure of sanitary sewer collection system to convey sewage can be attributed in part or in whole to an accumulation of grease in the town’s sewer main(s), the town will take appropriate enforcement actions, as stipulated in the town’s industrial pretreatment enforcement plan and sewer use ordinance codified in this chapter, against the generator or contributor of such grease.
(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. passed 4-24-2012)