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Section 3 -14 -350. Interceptor Required. Grease, oil and sand interceptors shall be installed by the User when, in the opinion of the City, they are necessary for the proper handling of liquid wastes containing grease, flammable waste, sand or other harmful ingredients, except that such interceptors shall not be required for dwelling units. Toilets, urinals, wash basins and other fixtures containing fecal material shall not flow through the interceptor. All interceptors shall be of a type and capacity approved by the Manager. The interceptor shall be installed in conformity with approved plans and in accordance with all City Codes and regulations. The interceptor shall be located so as to be readily and easily accessible for cleaning and inspection. The interceptor shall be maintained in efficient operating condition by periodic removal of accumulated waste. Failure to clean or maintain the interceptor shall be a violation and subject to an enforcement action. No wastewater having excessive temperatures which will cause pass through of grease, shall be discharged to the grease interceptor for any duration. No chemicals shall be added to the interceptor that will cause pass through of grease. Abandoned grease interceptors shall be emptied and filled as required for abandoned septic tanks (Section 1119 of the Uniform Plumbing Code). Section 3 -14 -355. Application of Most Stringent Limitations. The most stringent limitations, State, Federal, or local shall apply. Section 3 -14 -360. Supplemental Limitations. The limitations on wastewater strength and prohibitions in these regulations may be supplemented with more stringent limitation if: (a) The City determines that the limitations may not be sufficient to protect the operation of the POTW; or (b) The City determines that the limitations may not be sufficient to enable the POTW to comply with water quality standards, or effluent limitations specified in the POTW's NPDES permit; or (c) The discharge is of such a nature that it reduces or impairs the POTW's recycle, reclamation or disposal options; or (d) In the Manager's evaluation, the discharge, alone or in combination with any other discharge, poses a threat or unreasonable risk to the POTW or personnel. Section 3 -14 -365. Federal Categorical Pretreatment Standards. Upon promulgation of the Federal Categorical Pretreatment Standards for a particular industrial subcategory, the new Federal Standard or more stringent limitation shall immediately supersede. The City will notify all affected Users of the applicable reporting requirements under 40 CFR 403.12. Regardless of notification, Industrial Users are required to comply with all applicable Pretreatment Standards and requirements. Section 3 -14 -370. Proper Disposal of Sludge and Spent Chemicals. 15