15.40.024 Local limits.

   The director is authorized to establish local limits pursuant to 40 CFR Part 403.5(c). Local limits are established to protect against pass through and interference. No wastewater discharge shall exceed the local limits as determined by the director pursuant to section 15R.40.010 of this code.

   The local limits apply at the point where wastewater is discharged into the city’s sanitary sewer system. The director may impose mass limitations in addition to or in lieu of the concentration-based limitations above.

   The director may develop BMPs, by ordinance, or in wastewater discharge permits, to implement the local limits and requirements of sections 15.40.020 and 15.40.021.

(Ord. 2481 §1 (part))

15.40.025 City’s right of revision.

   The city reserves the right to establish, by ordinance or wastewater discharge permit, more stringent standards or requirements on discharges to the city’s sanitary sewer system, if deemed necessary to comply with the objectives of this chapter or the Act.

(Ord. 2481 §1 (part))

15.40.026 Excessive discharge/dilution.

   No user shall increase the use of process water or in any way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the discharge limitations contained in the pretreatment standards or requirement.

   The director may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.

(Ord. 2481 §1 (part))

ARTICLE III. PRETREATMENT OF WASTEWATER

15.40.027 Pretreatment facilities.

   Users who are CIUs, SIUs, or who are required by the director to obtain an industrial wastewater discharge permit shall provide wastewater pretreatment as necessary to comply with this chapter and shall achieve compliance with all categorical pretreatment standards and pretreatment requirement, local limits, and the prohibitions of this chapter within the time limitations specified by USEPA, the state, or the director, whichever is more stringent. Any facilities necessary for compliance shall be provided, operated, and maintained at the user’s expense. Detailed plans describing such facilities and operating procedures shall be submitted to the director for review, and shall be acceptable to the director before such facilities are constructed. The review of such plans and operating procedures shall in no way relieve the user from the responsibility of modifying such facilities as necessary to produce a discharge acceptable to the city under the provisions of this chapter. Subsequent changes in the pretreatment facilities or method of operation shall be reported to and acceptable to the director prior to the user’s initiation of the changes.

(Ord. 2481 §1 (part))

15.40.030 Interceptors.

   1.   An interceptor shall be installed in a user’s building sewer when in the opinion of the director it is necessary for the proper handling of wastewater containing grease or oil in excessive amounts, sand, grit or other harmful substances; except that such interceptors shall not be required for buildings used solely for residential purposes. Provided, however, that interceptors shall be constructed in any place or building having a capacity to serve group meals and in commercial and industrial cleaning facilities.

      Where the director requires the installation of an interceptor by a user who is neither an SIU nor a CIU, the user shall also be required to obtain a pollution prevention permit. Typical users required to install an interceptor and obtain a pollution prevention permit include, but are not limited to, restaurants, cafes, lunch counters, cafeterias, bars and clubs; hotels, hospitals, sanitariums, factory or school kitchens, equipment repair shops, service stations, and other establishments where grease, oils, sand, or grit may be introduced into the city’s sanitary sewer system in quantities that can obstruct the sewer or hinder wastewater treatment or private wastewater disposal.

   2.   All interceptors shall be of a type and capacity approved by the director and shall be so located as to be readily and easily accessible for cleaning and inspection. Interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, water-tight and equipped with easily removable covers which, when bolted in place, are gas- and water-tight. All interceptors shall be maintained by the user, at the user’s expense, in continuously efficient operation at all times.

   3.   Each user shall regularly inspect, clean, and repair interceptors. Records of inspections, cleaning and repairs, and the costs associated with these actions shall be kept for a minimum of three (3) years and be made available for inspection by city personnel upon request. Debris from interceptors shall be disposed of through a licensed waste hauler. Waste disposal records, including receipts, shall be kept for a minimum of three (3) years and be made available for inspection by city personnel upon request.

   4.   All interceptors shall comply with the following standards:

      a.   Plans shall be submitted to and approval obtained from the director prior to the installation of any interceptor.

      b.   All drains from kitchen areas including pre-wash shall be connected to an interceptor. Toilets, lavatories and other sanitary fixtures shall not be connected to any interceptor.

      c.   All fixtures discharging into an interceptor shall be individually trapped and vented in a manner approved by the director.

      d.   Each interceptor shall be so installed and connected that it shall be at all times easily accessible for inspection, cleaning, and removal of the intercepted material.

      e.   Interceptors shall be maintained in efficient operating condition by periodic removal of the accumulated materials. No such collected material shall be introduced into any drainage piping, public or private, or discharged to the city’s sanitary sewer system.

      f.   Each interceptor shall be constructed of durable materials satisfactory to the director and shall have a full-size gas-tight cover which can easily and readily be removed.

      g.   Interceptors required by this chapter shall not be installed until the type and/or model has been subjected to, and has fully complied with, tests acceptable to the director. Where existing conditions are found acceptable as determined by the director, such facilities as presently exist will be allowed to remain in use. Whenever it shall come to the attention of the director that any interceptor is no longer acceptable or does not comply with the provisions of this section, the director shall suspend or revoke such approval and require corrective measures.

(Ord. 2481 §1 (part))

15.40.120 Accidental spill and slug discharge control plans.

   1.   The director shall evaluate whether each SIU needs an accidental spill and slug control plan or other action to control slug discharges. The director may require any user develop, submit for approval, and implement such a plan or take other such action that may be necessary to control slug discharges. Alternatively, the director may develop such a plan for any such user. An accidental discharge/slug discharge control plan shall address, at a minimum, the following:

      a.   Description of discharge practices, including non-routine batch discharges;

      b.   Description of stored chemicals;

      c.   Procedures for immediately notifying the director of any accidental or slug discharge, as required by section 15.40.350; and

      d.   Procedures to prevent adverse impact from any accidental or slug discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site runoff, worker training, building of containment structures and equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.

   2.   Each user required to have an accidental spill and slug discharge control plan shall provide protection from spills or accidental discharges of prohibited materials or other substances regulated by this chapter. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the user’s own cost and expense. Detailed plans showing facilities and operating procedures to provide this protection shall be submitted to the director for review, and shall be approved by the director before construction of the facility.

   3.   Each user required to have an accidental spill and slug discharge control plan shall permanently post a notice on a bulletin board or other prominent place within the user’s place of business advising employees whom to call in the event of spill, slug discharge or an accidental discharge. Users shall ensure that all employees who may cause or suffer such spills or slug discharges to occur are advised of the emergency notification procedures.

(Ord. 2481 §1 (part))

15.40.140 Maintenance of side sewers.

   All users shall keep that portion of their side sewer in good repair, at their own expense, and shall be liable for any damages which may result from their failure to do so.

(Ord. 2481 §1 (part))