A. Construction. Grease traps shall be constructed in accordance with the city standards and shall have a minimum of two compartments with fittings designed for grease retention. All grease removal devises or technologies shall be subject to the written approval of the WSS. Such approval shall be based on demonstrated removal efficiencies of the proposed technology.
(B) Access. Access to grease traps shall be available at all times, to allow for their maintenance and inspection. Access to trap shall be provided by two manholes (one on each compartment) terminating at finished grade with cast iron frame and cover.
(C) Load-bearing capacity. In areas where additional weight loads may exist, the grease trap shall be designed to have adequate load-bearing capacity. (Example: vehicular traffic in driving or parking areas).
(D) Inlet and outlet piping. Wastewater discharging to a grease trap shall enter only through the inlet pipe of the trap. Each grease trap shall have only one inlet and one outlet pipe.
(E) Grease trap sizing. The required size of the grease trap shall be calculated using the city's grease trap sizing method. All grease traps shall have a capacity of not less than 1,000 gallons nor exceed a capacity of 3,000 gallons. If the calculated capacity exceeds 3,000 gallons, multiple units plumbed in series shall be installed. The DEU may grant upon written request a reduction in grease trap sizing due to feasibility of installation. Any approved reduction of grease trap sizing will also require an increased cleaning frequency directly proportional to the reduction of grease trap volume.
(Ord. 62-2011, passed 6-2-11)