(a) No later than one year after adoption of the ordinance from which this section is derived, all users shall install grease traps or interceptors designed to limit the introduction, contribution and discharge of grease into the county's wastewater collection system or POTW. Grease traps and interceptors with appropriate sampling or inspection points shall be installed at the user's expense whenever any user operates a commercial establishment, industrial establishment, or a cooking establishment. Grease traps and interceptors must have a minimum capacity of 1,000 gallons or more as required to effect a grease concentration maximum of 200 mg/l.
(b) Alternative methods of compliance may be approved by the county if the user demonstrates that compliance with this section is impossible or impractical at the time of adoption of this section as a result of limited space. However, any such proposed alternative method of compliance will be required to meet the performance criteria specified in subsection (a) of this section, and the user must adequately demonstrate to the satisfaction of the county that the proposed alternative method will satisfy those performance criteria. In addition, any such alternative method must be cleaned at a more frequent interval than is required of grease traps and interceptors under subsection (e) of this section. Prior to approval of any such proposed alternative method of compliance, documentation of the proposed method's actual performance criteria must be submitted to the county's pretreatment coordinator or operations director for review and approval.
(c) Grease traps and interceptors may also be required in other facilities, as deemed necessary by the county's pretreatment coordinator or operations director.
(d) Upon the prior written approval of the operations director, noncooking establishments may be exempted from the requirements of this section after an inspection of the subject premises and submission of adequate supporting documentation, as deemed necessary in the sole and absolute discretion of the operations director. At a minimum, such supporting documentation shall include: blueprints of the subject premises, a full and detailed description of the operations and activities at the subject premises, and a full and detailed list of all potential sources of grease at the subject premises.
(e) Users shall empty and service grease traps and interceptors to comply with the performance criteria in subsection (a) of this section as often as necessary, but in any event no longer than every 60 days. Under-the-counter types of grease traps and interceptors shall be cleaned at least daily, and shall comply with the performance criteria in subsection (a) of this section. There shall be no reintroduction of wastewater back into the grease trap or interceptor unless and until the wastewater has been proven to contain 200 mg/l or less of grease. Under no circumstances shall the sludge or scum layer be introduced or discharged into the county's wastewater collection system or POTW.
(f) Users shall supply:
(1) An adequate sampling point downstream of the grease trap or interceptor, prior to mixing with other sanitary flows;
(2) An accessible entry into each chamber of the grease trap or interceptor.
The minimum requirement for the sampling point shall be a four-inch vertical clean-out.
(g) Users shall retain detailed records on the site for a minimum of three years reflecting all maintenance carried out pursuant to this section. At a minimum, such records shall contain the following information: date of service, name of the employee involved, and a receipt reflecting all services rendered by the waste hauler providing the service.
(h) Users are required to keep the grease trap or interceptor free of inorganic solids such as grit, towels, gloves, cigarettes, eating utensils, etc., which could clog or settle in the trap or interceptor, thereby reducing the effective volume or capacity of the trap or interceptor.
(i) Users are required to ensure that all waste material removed from grease traps and interceptors is disposed of in a manner that complies with all federal, state and local statutes, rules, regulations, policies and ordinances.
(j) Except as provided in this section, for a period of one year following the adoption of this section, no enforcement actions will be taken under this section for failure to achieve the performance criteria specified in subsection (a) of this section. If, during such period, an obstruction of any of the county's sanitary sewer mains occurs and causes a sewer overflow, spill, leak or other event with any environmental impact, and such overflow, spill, leak or other event may be attributed in part or in whole to a particular user, then the county will seek enforcement action under this article, and/or the pretreatment enforcement plan. For purposes of this section, an overflow, spill, leak or other event shall be deemed to have an environmental impact when such overflow or other vent involves an amount of wastewater equal to or in excess of 1,000 gallons, or any amount of wastewater reaches any body of surface water.
(Ord. of 12-3-2001; Ord. of 3-4-2013)