(a) The operator must apply for all necessary permits prior to installation of any grease trap or interceptor.
(b) The Building Commissioner shall inspect the installation of the trap or interceptor.
(c) Grease traps shall be installed a minimum distance of ten feet from sinks and dishwashers to allow for adequate cooling of wastewater. Water temperatures must be less than 150 F prior to entering grease trap.
(d) Sample port. A sample port shall be installed on the effluent line of each grease trap. The port shall be a minimum of four inches in diameter and be connected to the sewer line at a ninety degree angle to allow for sampling activities. The port shall be installed in such a manner as to be protected from storm water contamination and maintained in a safe and proper operating condition. The plug on the sample port must be easily removable.
(e) Users who are required to pass water through a grease interceptor shall:
(1) Provide for a minimum hydraulic retention time of twenty-four minutes at actual peak flow or twelve minutes at the calculated theoretical peak flow rate as predicted by the Ohio Plumbing Code (OPC) fixture criteria, between the influent and effluent baffles with twenty percent of the total volume of the grease interceptor being allowed for sludge to settle and accumulate, identified hereafter as a "sludge pocket".
(2) Remove accumulated grease cap and sludge pocket as required, but at intervals of not longer than thirty days at the users expense. Grease interceptors shall be kept free of inorganic materials such as grit, rocks, gravel, sand, eating utensils, cigarettes, shells, towels, rags, etc., which could settle into this pocket and thereby reduce the effective volume of the grease interceptor.
(3) Except 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 into the grease interceptor as an activity of and after onsite treatment, the user shall be responsible for the attainment of established grease numerical limit consistent with and contained in Section 1044.03 on all discharges of wastewater from said grease interceptor into the City of North Royalton sewer collection and treatment system.
(4) Operate the grease interceptor in a manner so as to maintain said device such that attainment of 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 Section 1043.08. 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 City sewer main and easement in relation to available exterior space outside building.
B. Existing plumbing at or in a site that uses common plumbing for all services at that site.
(5) The use of biological additives as a grease degradation agent is conditionally permissible, upon prior written approval by the Wastewater Department. 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) The use of automatic grease removal systems is conditionally permissible, upon written approval by the Superintendent of the City of North Royalton and/or the Cuyahoga County Board 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.
(7) 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 such traps.
(8) Where applicable, access manholes, with a minimum diameter of twenty-four 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. 09-119. Passed 11-17-09.)