§ 52.015 GENERAL DISCHARGE PROHIBITIONS.

   (A)   No user shall discharge or cause to be discharged, directly or indirectly, into the wastewater disposal system any substance which exceeds or any other way violates the prescribed design limitations of the system.

   (B)   (1)   In addition to compliance with these limitations, no user shall discharge to any public sewer any discharge which causes interference as defined with the wastewater disposal system.

      (2)   Pollutants in the effluent from an industrial user shall not be considered to cause interference where the industrial user is in compliance with specific limitations or standards developed by federal, state, or local governments.

      (3)   Where the industrial user is in compliance with the specific limitations or standards and pollutants in the effluent from the industrial user’s facility nevertheless are determined to have caused or significantly contributed to a violation of any requirement of the city’s NPDES or state disposal system permit and are likely to cause such a violation in the future, the city must take appropriate action to develop and enforce specific effluent limits for that industrial user to ensure renewed and continued compliance with the city’s NPDES or state disposal system permit.

(Prior Code, § 14-2-1)

§ 52.016 NATIONAL CATEGORICAL PRETREATMENT STANDARDS.

   (A)   National categorical pretreatment standards promulgated by the U.S. Environmental Protection Agency (EPA) pursuant to the Act shall be met by all users which are subject to such standards in any instance where they are more stringent than the limitations in this chapter unless the Director has applied for and obtained from the MPCA approval to modify the specific limits in the national categorical pretreatment standards will be considered for submittal by the Director when the city’s wastewater treatment system achieves consistent removal of the pollutants. CONSISTENT REMOVAL shall be defined as in 40 C.F.R. part 403 of the General Pretreatment Regulations for Existing and New Sources of Pollution.

   (B)   Conditional revisions of national categorical pretreatment standards may be made by the city in accordance with 40 C.F.R. part 403 if requested by the industry, in accordance with 40 C.F.R. part 403.

(Prior Code, § 14-2-2) (Ord. 132, passed 1-23-1984)

§ 52.017 STATE AND LOCAL REQUIREMENTS.

   State requirements and limitations on discharges shall be met by all users which are subject to the standards in any instance in which they are more stringent then federal requirements and limitations or those in this chapter or any other applicable ordinance.

(Prior Code, § 14-2-3)

§ 52.018 PRETREATMENT FACILITIES.

   Users shall provide necessary wastewater treatment as required to comply with this chapter and shall achieve compliance with all national categorical pretreatment standards within the time limitations as specified by the federal pretreatment regulations. Any facilities required to pretreat wastewater shall be provided, operated, and maintained at the user’s expense. Plans showing the pretreatment facilities and operating procedures shall be included as part of the permit application. The review of the plans and operating procedures will in no way relieve the user from the responsibility of modifying the facility as necessary to produce an effluent acceptable under the provisions of this chapter. Any subsequent changes in the pretreatment facilities or method of operation shall be reported to the Director prior to the user’s initiation of the changes and shall be in compliance with the existing permit, the terms of this chapter, and all other applicable regulations.

(Prior Code, § 14-2-4)

§ 52.019 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 limitations contained herein, contained in the national categorical pretreatment standards, or contained in any state requirements.

(Prior Code, § 14-2-5)

§ 52.020 ACCIDENTAL AND SLUG DISCHARGES.

   (A)   Each user shall provide protection from accidental discharge of prohibited materials or other substances regulated by this chapter. Where necessary, facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner’s or user’s own cost and expense. Plans showing facilities and operating procedures to provide this protection shall be submitted as part of the application. Review and approval of the plans and operating procedures shall not relieve the industrial user from the responsibility to modify the user’s facility as necessary to meet the requirements of this chapter.

   (B)   Users shall notify the Director immediately upon having a slug or accidental discharge of substances or wastewater in violation of this chapter in order to enable counter measures to be taken by the Director to minimize damage to the wastewater disposal system and receiving waters. The notification will not relieve users of liability for any expense, loss, or damage to the wastewater disposal system or treatment process, or for any fines imposed on the city on account thereof under any state or federal law. A notice shall be permanently posted in the user’s bulletin board or other prominent place advising employees whom to call in the event of a slug or accidental discharge. Employers shall ensure that all employees who may cause or discover a discharge are advised of the emergency notification procedure.

(Prior Code, § 14-2-6)

§ 52.021 SLUDGES GENERATED.

   Sludges, screenings, skimmings, and the like, generated by an industrial or commercial pretreatment system shall not be placed into the city’s wastewater disposal system. The materials shall be contained, transported, and disposed of in accordance with all federal, state, and local regulations.

(Prior Code, § 14-2-7)