Mountain House Municipal Code Ch. 3 Pretreatment of Wastewater

The City Manager shall, from time-to-time, establish quantitative or other limitations applicable to industrial wastewater discharges when in his or her judgment it is necessary to protect the City's sewerage system or comply with federal, State, or local law. Such limitations shall apply at the industrial wastewater monitoring facility or station prior to mixing with domestic wastewaters. Wastewater discharges in excess of applicable limitations shall constitute excessive concentrations or quantities prohibited by this section. The City Manager shall promulgate and maintain a list of limitations established for restricted wastes that generally apply to all dischargers and shall make such list available upon request.

(Ord. 2024-23, § 1(Exh. A), 2024)

Users shall provide wastewater treatment as necessary to comply with this Ordinance. Users shall achieve compliance with all categorical pretreatment standards, local limits, and the prohibitions set forth in this Ordinance within the time limitations specified by EPA, the State, or the City, whichever is more stringent. The user shall provide, operate, and maintain any facilities necessary for compliance at the user's expense. The user shall submit detailed plans that describe such facilities and operating procedures to the City for its review. The plans submitted shall be acceptable to the City before the user constructs such facilities. The City's review of the plans and operating procedures shall in no way relieve the user from its responsibility to modify such facilities as necessary to produce a discharge acceptable to the City under this Ordinance. The user shall submit and obtain the City's approval of all subsequent changes in the user's pretreatment facilities or method of operation before the user implements any such change. Approval of a user's plans (including changes to the pretreatment facilities or operations) shall not relieve a user of its responsibility to take all steps necessary to comply with wastewater limitations prescribed in accordance with law.

(Ord. 2024-23, § 1(Exh. A), 2024)

(a) The City may require users to restrict their discharges during peak flow periods, discharge certain wastewater only into specific sewers, relocate and/or consolidate points of discharge, separate sewage waste streams from industrial waste streams, and satisfy such other conditions as the City may deem necessary to protect the POTW or determine the user's compliance with the requirements of this Division.

(b) The City may require waste minimization, source control evaluation, or plans to conserve water or any combination thereof. The City may require investigation of new product or chemical agent substitution, implementation of inventory control procedures, implementation of employee education, conductance of internal audits, and implementing steps as necessary to minimize waste produced.

(c) The City may require any person who discharges into the POTW to install and maintain on that person's property and at that person's expense, a suitable storage and flow-control facility to ensure equalization of flow. The City may issue a wastewater discharge permit for flow equalization.

(d) The City shall require grease, oil, and sand interceptors when it deems them necessary to the proper handling of wastewater that contains excessive amounts of grease, oil, or sand. The City shall not require such interceptors for residential users. All interception units shall be of a type and capacity approved by the City and located so as to provide easy access for cleaning and inspection. The user shall inspect, clean, and repair such interceptors at its expense and maintain the same in continuously efficient operation at all times.

(e) The City may require users with the potential to discharge flammable substances to install and maintain an approved combustible gas detection meter.

(f) The user shall keep all domestic wastewaters from restrooms, showers, drinking fountains, etc., separate from all industrial wastewaters until the industrial wastewaters have passed through any required pretreatment system or device and monitoring facility or station.

(Ord. 2024-23, § 1(Exh. A), 2024)

(a) Each user shall provide protection from accidental discharge of prohibited materials or other wastes regulated by this Ordinance.

(b) The City shall evaluate whether each significant industrial user needs an accidental discharge/slug discharge control plan or other action to control accidental discharges and slug discharges. The City may require any user to develop, submit for approval, and implement such a plan or take such other action as may be necessary to control such discharges. Alternatively, the City may develop such a plan for any user. A user's accidental discharge/slug discharge control plan shall at a minimum address the following:

(1) Discharge practices, including nonroutine batch discharges;

(2) Stored chemicals;

(3) Procedures for immediately notifying the City of any accidental discharge or slug discharge as required by this Ordinance; and

(4) Procedures to prevent adverse impact from any accidental discharge 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 or equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.

(Ord. 2024-23, § 1(Exh. A), 2024)

(a) Waste from septic tanks, seepage pits, cesspools, chemical toilets, or other approved waste-holding devices or transport vehicles may be introduced into the POTW only at locations and times designated by the City in a wastewater discharge permit or other written authorization of the City. Such waste shall not violate this Ordinance or any other requirements established by the City.

(b) The City may require haulers of industrial waste to obtain wastewater discharge permits. The City may require generators of hauled industrial waste to obtain wastewater discharge permits. The City also may prohibit the disposal of hauled industrial waste. The discharge of hauled industrial waste is subject to all other requirements of this Division.

(c) Industrial waste haulers may discharge loads only at locations designated by the City and with the City's prior consent. The City may collect samples of each hauled load to ensure compliance with applicable standards and require the industrial waste hauler to provide a waste analysis of any load prior to discharge.

(d) Industrial waste haulers shall provide a waste-tracking form for every load. This form shall include at a minimum the name and address of the industrial waste hauler, permit number, truck identification, names and addresses of the waste sources, and volume and characteristics of waste. The form shall identify the type of industry, known or suspected waste constituents, and whether any wastes are hazardous wastes under RCRA.

(Ord. 2024-23, § 1(Exh. A), 2024)