(A) Pretreatment facilities. Users shall provide wastewater treatment as necessary to comply with this chapter and wastewater permits issued under § 52.21 and shall achieve compliance with all National Categorical Pretreatment Standards, local limits, and the prohibitions set out in § 52.05 within the time limitations as specified by EPA, the state, or the POTW Director, whichever is more stringent. Any facilities necessary for compliance shall be provided, operated, and maintained at the user's expense. Detailed plans showing the pretreatment facilities and operating procedures shall be submitted to the city for review, and shall be approved by the POTW Director before construction of the facility. The review of such plans and operating procedures shall in no way relieve the user from the responsibility of modifying the facility as necessary to produce an effluent acceptable to the city under the provisions of this chapter. Any subsequent changes in the pretreatment facilities or method of operation shall be reported to and be approved by the POTW Director prior to the user's initiation of the changes.
(B) Additional pretreatment measures.
(1) Whenever deemed necessary, the POTW Director may require users to restrict their discharge during peak flow periods, designate that certain wastewater be discharged only into specific sewers, relocate and/or consolidate points of discharge, separate sewage wastestreams from industrial wastestreams, and such other conditions as may be necessary to protect the POTW and determine the user's compliance with the requirements of this chapter.
(2) The POTW Director may require any person discharging into the POTW to install and maintain, on their property and at their expense, a suitable storage and flow control facility to ensure equalization of flow. A wastewater discharge permit may be issued solely for flow equalization.
(3) In general, grease, oil, and sand interceptors shall be provided when, in the opinion of the POTW Director, they are necessary for the proper handling of wastewater containing excessive amounts of grease and oil, or sand; except that such interceptors shall not be required for residential users. All interception units shall be of type and capacity approved by the POTW Director in conjunction with the Chief Building Inspector and shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired regularly, as needed, by the user and at the user's expense. To assist in the prevention of sanitary sewer blockages and obstructions resulting from the contribution and accumulation of fats, oils, and greases into the municipal wastewater system from industrial or commercial establishments, particularly food preparation and/or serving facilities, all food preparation and/or serving facilities with existing grease interceptors shall be subject to the following additional regulations. Furthermore, as of January 1, 2004, all food preparation and/or serving facilities that are proposed, constructed, expanded, renovated, reconstructed, or change ownership shall be required to provide/install and maintain a grease interceptor in compliance with the following supplemental regulations for grease interceptors prior to such users opening, expanding, or reopening the food preparation and/or serving facility.
(a) All grease interceptors shall be of a type and capacity approved by the POTW Director in conjunction with the Chief Building Inspector and shall be located as to be readily and easily accessible for cleaning and inspection. The POTW Director shall have the right to make determinations concerning the adequacy of a particular grease interceptor on the basis of a review of all relevant information regarding the grease interceptor in question, including but not limited to, the past performance of the interceptor, the facility site, and a review of the building plan. If such a review of the relevant information results in the POTW Director making the determination that a particular grease interceptor is inadequate, the POTW Director shall have the right and authority under this chapter to require the responsible party to repair, modify, or replace the interceptor in question.
(b) The POTW Director may also require the utilization of grease interceptors by industrial and non-domestic users, when in the opinion of the POTW Director, such interceptors are necessary for the proper handling of wastewater containing fats, oil, and grease in concentrations as determined by Standard Method 5520B in excess of 100 mg/l.
(c) All grease interceptors shall be provided and maintained in continuously efficient operation at all times by and at the expense of the users.
(d) Each user's grease interceptor shall be cleared of grease, sludge, and debris as required to maintain minimum design capability. In ground interceptors shall be cleaned, at a minimum frequency, of every 90 days. The under the sink interceptors shall be cleaned daily. The POTW Director may require of a user variable cleaning frequency if conditions warrant. All maintenance and cleaning shall be performed by the user at his or her expense. The user shall be responsible for the proper removal and disposal by appropriate means of the captured material. Any removal and hauling of collected material shall be performed according to all applicable federal, state, and local government laws, ordinances, and regulations. No waste removed from the interceptor shall be reintroduced into the sanitary sewer or back into the interceptor.
(e) The use of enzymes or emulsifiers is prohibited.
(f) The use of hot water flushing to clear the interceptor is prohibited.
(g) All users shall maintain written records of maintenance performed on the interceptor for a minimum of three years and shall immediately produce such records upon receipt of a request for the records from the POTW Director or his or her designee. The records shall include a receipt for the maintenance performed. In order for such a receipt to be valid for purposes of this chapter, the receipt must be signed by the relevant contractor and dated.
(4) Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
(Ord. 5-03, passed 5-15-03; Am. Ord. 10 ORD 02-08, passed 2-7-08; Am. Ord. 31 ORD 12-12, passed 12-6-12) Penalty, see § 52.99