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The city reserves the right to enter into special agreements with users, setting out special terms under which they may discharge into the system. In no case will a special agreement waive compliance with a pretreatment standard or requirement. However, the user may request a net gross adjustment to a categorical standard in accordance with 40 CFR Part 403.15. The user may also request a variance from the categorical pretreatment standard from the approval authority. Such a request will be approved only if the user can prove that factors relating to its discharge are fundamentally different from the factors considered by EPA when establishing that categorical pretreatment standard. A user requesting a fundamentally different factor variance must comply with the procedural and substantive provisions in 40 CFR Part 403.13.
(`64 Code, Sec. 25-18) (Ord. No. 2494)
(A) The city manager may grant a variance from one or more of the provisions of this article. Prior to issuing such a variance, the city manager shall verify that in no case will the granting of a variance allow the user to exceed applicable categorical pretreatment standards or requirements or federally mandated prohibitions.
(B) The city manager may require the user to monitor the volumes and/or concentrations of the discharge in excess of previous levels, if the city manager deems it necessary to properly enforce any variance granted under this section.
(C) The city manager reserves the right to impose requirements that are stricter than, or in addition to, those specified under the authority of sections 19-25 and 19-26 should the quantity or quality of the user's discharge merit unique consideration by virtue of the impact of the user's discharge on the system or public health and welfare.
(D) The city manager reserves the right to revoke the variance at any time.
(E) The city manager reserves the right to charge additional fees related to the granting of a variance.
(`64 Code, Sec. 25-19) (Ord. No. 2494)
No user shall ever increase the use of process water for the purpose of diluting a discharge, or in any other way attempt to dilute a discharge. The city manager may impose mass limitations on users suspected of using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.
(`64 Code, Sec. 25-20) (Ord. No. 2494)
DIVISION 4. PRETREATMENT OF INDUSTRIAL WASTEWATER
Users shall provide wastewater pretreatment 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 19-25 of this article within the time limitations specified by EPA, the State, or the city manager, whichever is more stringent. Any facilities necessary for compliance shall be provided, operated, and maintained at user's expense. Detailed plans describing such facilities and operating procedures shall be submitted to the city manager for review, and shall be acceptable to the city manager before such facilities are constructed. The review of such plans and operating procedures will in no way relieve the user from the responsibility of modifying the facility as necessary to produce a discharge acceptable to the city manager under the provisions of this article.
(`64 Code, Sec. 25-21) (Ord. No. 2494)
(A) Whenever deemed necessary, the city manager 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 domestic waste streams from industrial waste streams, and such other conditions as may be necessary to protect the system and determine the user's compliance with the requirements of this article.
(B) The city manager may require any person discharging into the system to install and maintain, on their property and at their expense, a suitable storage and flow-control facility to ensure active management of flow. An IWD permit may be issued solely for flow regulation.
(C) Users shall provide gravity separation devices when, in the opinion of the city manager, they are necessary for the proper handling of wastewater containing excessive amounts of oil and grease or sand. All gravity separation devices shall be of a type and capacity approved by the city manager and shall be so located to be easily accessible for cleaning and inspection. Such devices shall be inspected, cleaned, and repaired regularly, as needed, by the user at user's expense.
(D) The city manager may require users with the potential to discharge flammable substances to install and maintain an approved combustible gas detection meter.
(E) All dental dischargers are required to maintain a current industrial wastewater discharge permit.
(`64 Code, Sec. 25-22) (Ord. No. 2494, 2997)
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