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A. All grease removal systems shall be maintained to ensure proper operation. At a minimum, interceptor-style GRSs shall be cleaned at least once every ninety days and trap-style GRSs cleaned at least once per week. These required frequencies may be extended with the approval of the director. Grease removal systems must be cleaned whenever the combined thickness of the floating greases and settled solids is equal to, or greater than, twenty-five percent of the total liquid depth in the GRS.

B. When cleaned, an interceptor-style GRS must be completely pumped out, all solids removed, solidified grease scraped from the interior and the structure and all internal plumbing inspected for damage and corrosion. The GRS shall be refilled with water prior to being placed back into operation. If repairs are required, they shall be performed within seven days.

C. Trap-style GRSs may be maintained by the FSE or NFD. When cleaned, the trap must have surface grease and oil removed, settled solids removed, all sides scraped, removable parts removed and cleaned, be inspected for damage and corrosion, and be properly reassembled. If repairs are required, they shall be performed within seven days.

D. The material that is removed in the process of cleaning a GRS shall not be discharged back into the GRS, any part of the POTW, any private sewer, any drainage piping, or storm sewer system. All materials removed shall be handled and disposed of in accordance with federal, state, county and local laws, rules and regulations.

E. In addition to the maintenance required above, automatic grease removal systems shall be maintained in accordance with the manufacturers’ guidelines. (Ord. 3071-08 § 3.3, 2008.)