(A) Conditions under which a pretreatment system or device may be required. An industrial wastewater pretreatment system or device may be required by the Director to pretreat industrial wastewater prior to discharge into the sewer system. Any person who is prohibited from discharging a substance as specified in these regulations, or who is required to provide pretreatment under federal pretreatment standards and requirements, shall have the sole responsibility to devise, at his or her own expense, the methods for eliminating the problem so as to make any waste discharge eligible for a permit and for compliance with this chapter and federal regulations.
(B) Review required. All pretreatment systems or devices shall be reviewed by the Director; however, Director approval shall not absolve the industrial user of the responsibility of meeting any industrial effluent limitation required in the permits.
(C) Periodic inspection required. All pretreatment systems or devices shall be subject to periodic inspection by the county.
(D) Grease, oil and sand interceptors. Grease, oil and sand interceptors shall be provided, when deemed necessary by the Director, for the proper handling of liquid wastes containing grease in excessive amounts, sand or other harmful ingredients. All interceptors shall comply with all applicable local and state plumbing codes and be acceptable to the Director, and shall be located as to be readily accessible for cleaning and inspection. All interceptors shall comply with the following provisions:
(1) General requirements.
(a) All interceptors shall be designed so that they will not become air bound or permit siphonage, and shall be equipped with a flow control fitting with external cleaning devices.
(b) All traps shall be properly vented and a fresh air inlet or vent shall be installed on the house side of the interceptor. The outlet of the interceptor shall have a vacuum breaker or vent.
(2) Oil and grease interceptors.
(a) An approved interceptor shall be installed in the drainage system of the building or premises of the following uses or occupancies, unless its omission is approved by the Director: restaurants, public eating places, food preparation at institutions and schools, all wastes in meat preparation areas, pot sinks, dishwashing machines, can washers, commercial garages, repair shops, service stations, trucking docks, laundries, and any other places whose wastes would be expected to contain oil or grease.
(b) Interceptors shall be so constructed as to be oil-tight and shall have easily removable, watertight and/or gastight covers as required.
(c) Every interceptor shall have a vent not less than two inches in diameter, connected to the interceptor tank to relieve vapor, and terminated in an approved manner.
(Ord. passed 9-9-08)