Users shall provide wastewater treatment as necessary to comply with this article and shall achieve compliance with all categorical pretreatment standards, local limits, and the prohibitions set out in section 13.05.031 of this article within the time limitations specified by EPA, the state, or the superintendent, 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 public works department for review and shall be acceptable to the public works department 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 article.
(Ordinance 1711 adopted 4/24/18; Ordinance 1860 adopted 8/8/2023)
(a) 
Whenever deemed necessary, the superintendent 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 waste streams 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 article.
(b) 
The superintendent 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. An individual wastewater discharge permit may be issued solely for flow equalization.
(c) 
Grease, oil, and sand interceptors shall be provided when, in the opinion of the superintendent, they are necessary for the proper handling of wastewater containing excessive amounts of grease and oil, or sand; except that such interceptors shall not be required for residential users. All interception units shall be of a type and capacity approved by the superintendent, shall comply with the city's oil and grease management ordinance, and shall be located so as to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired in accordance with the city's oil and grease management ordinance by the user at their expense.
(d) 
Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
(e) 
At no time shall two readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, be more than five percent (5%) not any single reading over ten percent (10%) of the lower explosive limit (LEL).
(Ordinance 1711 adopted 4/24/18; Ordinance 1860 adopted 8/8/2023)
The superintendent shall evaluate whether each SIU needs an accidental discharge/slug discharge control plan or other action to control slug discharges. The superintendent may require any user to develop, submit for approval, and implement such a plan or take such other action that may be necessary to control slug discharges. Alternatively, the superintendent may develop such a plan for any user. An accidental discharge/slug discharge control plan shall address, at a minimum the following:
(1) 
Description of discharge practices, including nonroutine batch discharges;
(2) 
Description of stored chemicals;
(3) 
Procedures for immediately notifying the public works department of any accidental or slug discharge, as required by section 13.05.146 of this article; and
(4) 
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 or equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.
(Ordinance 1711 adopted 4/24/18; Ordinance 1860 adopted 8/8/2023)
Septic tank waste may be introduced into the POTW only at locations designated by the superintendent, and at such times as are established by the public works department. Such waste shall not violate section 13.05.031 of this article, or any other requirements established by the city. The public works department may require septic tank waste haulers to obtain individual wastewater discharge permits.
(Ordinance 1711 adopted 4/24/18; Ordinance 1860 adopted 8/8/2023)