A. Any generator responsible for discharges requiring a GGI shall, at his/her expense and as required by the city, provide plans and specifications for equipment and facilities of a design type and design capacity approved by the public works operations/engineering division of the city of Gig Harbor. The GGI must be in compliance with the Gig Harbor Municipal Code and public works standards, and the Uniform Plumbing Code. The generator shall locate the interceptor in a manner that provides easy accessibility for cleaning, maintenance and inspection. Representatives of the public works operations/engineering division shall inspect and approve the interceptor during construction and upon completion before any service connections are made.

B. The GGI shall be constructed with a minimum of two chambers or shall have a minimum of two tanks in series. All tanks shall be coated with an approved material to maintain structural integrity externally for inflow prevention and internally to protect degradation of structure from hydrogen sulfide and/or compounds that may damage integrity (see public works standards for approved coatings).

C. There must be inlet and outlet tees made of minimum six-inch schedule 40 PVC installed. The inlet tee should extend down approximately one-third the depth of the interceptor (GGI) from the top and the outlet tee should be located 12 inches off of the bottom of the interceptor.

D. Construction of items listed herein in accordance herewith or in accordance to the city’s specifications shall not constitute a defense to unlawful discharge and shall not limit the generator’s liability for any surcharge stated in this chapter. (Ord. 1185 § 4, 2010; Ord. 1107 § 7, 2007; Ord. 1087 § 6, 2007).