(A)   Pretreatment Facilities. Users shall provide wastewater treatment as necessary to comply with this chapter and wastewater permits issued under § 52.051 and shall achieve compliance with all National categorical pretreatment standards, local limits, and the prohibitions set out in § 52.020 of this chapter within the time limitations as specified by the 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 acceptable 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)   The POTW Director may require grease, oil, and/or grit interceptors to be installed when required under subdivision (a) below, or when they are necessary for compliance with oil and grease limits under § 52.022(A) of this chapter or to prevent grit from entering the sewer system in quantities which require regular maintenance, or potentially cause reduction in sewer pipe capacity or blockages; 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 and shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be cleaned, and repaired regularly, as needed, by the user at the user's expense.
         (a)   Users operating commercial food preparation, processing, or serving facilities shall install and maintain at the user's expense an approved oil and grease interceptor through which the wastewater from this area of the facility shall pass before being discharged to the public sewer. Such interceptor shall be constructed in accordance with city standard details or in accordance with a submitted design by a professional engineer who certifies to the city under professional seal that the design will achieve oil and grease removals required by the city's ordinance at specified maximum operating conditions of the user with proper and specified operation and maintenance. Oil and grease interceptors for commercial food facilities shall be serviced and emptied of their waste content as often as required to prevent release of any oil and grease initially contained by the interceptor, and such wastes removed by the emptying of the interceptor shall not be discharged to the public sewer. The user shall maintain a written record for three years of history of each date that the interceptor is serviced along with the quantity of waste removed, and the waste hauler performing the service. The user shall also post information regarding best management practices for keeping oil and grease from entering the city system and train employees to comply with such practices.
      (4)   Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
(Ord. passed 6-22-94; Am. Ord. O-1996-11, passed 5-7-96; Am. Ord. O-2008-11, passed 3-18- 08; Am. Ord. O-2013-13, passed 5-21-13)