1. Grease Trap/Interceptor Requirements. All food service establishments shall install, operate and maintain an approved type and adequately sized grease trap/interceptor necessary to maintain compliance with the objectives of this Part unless subject to an exemption expressly provided in this Part 9. All grease trap/interceptors must meet the requirements of the Hanover Township Plumbing Code and construction specifications. [Ord. 563]
2. Implementation. All food service establishments which intend to install a grease trap or interceptor in a new or existing facility, whether required by this Part 9 or at the discretion of the user, must obtain prior approval from the Hanover Township Engineer for grease trap/interceptor sizing prior to submitting plans for a building permit or application for an FSE permit.
3. Variance from Grease Interceptor Requirements.
A. Grease interceptors required under this Part 9 shall be installed unless (a) a food service establishment has installed an adequate grease trap as of the effective date of this Part 9, or (b) the Hanover Township Engineer determines that the installation of a grease interceptor would not be feasible and authorizes the installation of an indoor grease trap or other approved alternate pretreatment technology.
B. An FSE may request approval by the Township Engineer of an alternate grease removal device if a grease interceptor is not feasible. The food service establishment bears the burden of demonstrating that the installation of a grease interceptor is not feasible. Such written request shall contain the following information:
(1) Location of sewer main and easement in relation to available exterior space outside building.
(2) Existing plumbing at or in a site that uses common plumbing for all services at that site.
(3) A plan showing the above and any other information required by the Township Engineer.
C. The Township Engineer will determine whether to grant a variance on the following criteria:
(1) Is there is adequate space?
(a) Adequate room for installation.
(b) Will property lines be an issue.
(c) Will proposed trap/interceptor be too close to building foundation/footing.
(2) Is a sewer main accessible?
(a) Sewer main located within a workable distance.
(b) Depth of sewer main acceptable for proper installation and pipe slope.
(3) Is the site sewer service acceptable?
(a) Building sewer lateral accessible.
(b) Will current plumbing layout without major re-plumbing support exterior grease trap/interceptor.
(c) Tank location accessible for unhindered maintenance.
D. Alternative pretreatment technology includes, but is not limited to, devices such as a grease trap that are used to trap, separate and hold grease from wastewater and prevent it from being discharged into the sanitary sewer collection system. All alternative pretreatment technology must be appropriately sized and approved by the Hanover Township Engineer.
4. Existing Grease Trap. For purposes of subsection (3)(a), above, an existing grease trap located within an FSE is adequate, if it meets the following criteria below: [Ord. 563]
A. Has a stated rate of not more than 55 gallons per minute nor less than 20 gallons per minute; and, [Ord. 563]
B. Meets the grease trap sizing requirements set forth by Hanover Township; and, [Ord. 563]
C. The FSE has an adequate grease trap/interceptor set-up for the hot water only pre-rinse wash procedure.
An existing grease trap located within an existing building is not adequate if it does not meet the above criteria. A properly sized exterior grease interceptor must be installed for any existing interior grease trap that is not adequate. If the installation of an exterior grease interceptor is not feasible, then the use of the hot water only pre-rinse wash procedure and an adequately sized or additional approved grease trap/interceptor is required.
5. Existing FSEs.
A. Food service establishments which have been constructed or are under construction as of the effective date of this Part and do not have grease traps/interceptors installed or included in building plans shall be exempt from the requirement to install grease traps and/or interceptors, unless:
(1) Plumbing improvements with a building permit valuation of $10,000 or more are made to the building in which the FSE is located.
(2) The Hanover Township Engineer determines the sewer discharge from the FSE has a reasonable potential to adversely impact the Hanover Township’s sewer system or the POTW and the FSE has been notified in writing to install a grease trap/interceptor within the specified period set forth in the notification letter. [Ord. 563]
6. The Township Engineer shall make determinations of grease trap/interceptor adequacy, need and other determinations required by this Part 9, based on review of all relevant information regarding grease trap/interceptor performance, facility site and building plan review and shall require repairs to, or modification or replacement of such traps as he determines appropriate in his professional judgment in accordance with the standards set forth or referenced in this Part 9.
(Ord. 516, 6/1/2011; as amended by Ord. 563, 7/2/2014)