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§ 31.341 RESTRICTED DISCHARGES
   (A)   Wastewater containing more than twenty five (25) milligrams per liter of petroleum oil, non-biodegradable cutting oils, or products of mineral oil origin.
   (B)   Wastewater containing floatable oils, fat, or grease, whether emulsified or not, in excess of one hundred (100) milligrams per liter or containing substances which may solidify or become viscous at temperatures 32-150 degrees (0-65 degrees C).
   (C)   Any garbage that has not been properly shredded. Garbage grinders may be connected to sanitary sewers from homes, motels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
   (D)   Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants which: injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, causes the city to violate the terms of its KPDES permit, prevents the use of acceptable sludge disposal methods, or exceed a limitation set forth in a categorical pretreatment standard.
   (E)   Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the city in compliance with applicable state or federal regulations.
   (F)   Any water or wastes which by interaction with other water or wastes in the public sewer system release obnoxious gases, from suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
   (G)   Any wastewater with objectionable color which cannot be removed to an acceptable level within the operation of the wastewater treatment process unless otherwise specifically noted in the industrial user permit (IUP).
   (H)   Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed to the extent required by the city's NPDES/KPDES permit.
   (I)   Any waste(s) or wastewater(s) classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA) without a sixty (60) day prior notification of such discharge to the superintendent. This notification must include the name of the hazardous waste, the EPA hazardous waste number, type of discharge, volume/mass of discharge and time of occurrence(s). The superintendent may prohibit or condition the discharge(s) at any time.
   (J)   (1)   Any water or wastes which have characteristics based on a twenty-four (24) hour composite sample, grab or a shorter period composite sample, if more representative, that exceed the following normal maximum domestic wastewater parameter concentrations:
 
Parameter
Maximum Allowable Concentration Without Surcharges
BOD
250 mg/l
TSS
250 mg/l
NH3 -N
25 mg/l
Oil and Grease (total)
100 mg/l
 
      (2)   Any person discharging wastewater exceeding the maximum allowable concentration as noted above, will be subject to a surcharge fee for each pound loading over and above the set limit. Any other amenable constituents requiring the addition of specific chemicals for proper treatment will also be subject to surcharge as noted on the industrial user permit. Exceedance of the effluent limits specified above shall not be deemed to constitute a violation of a permit condition or this chapter if the appropriated surcharge fee is paid and the discharge does not cause interference or pass through of the POTW.
   (K)   The Utility Director and/or his or her designee is authorized to establish local limits pursuant to 40 CFR 403.5(c). In addition, the Utility Director may require the development of best management practices (BMPs), by ordinance or in individual wastewater discharge permits, to implement local limits and the requirements of this chapter. Such BMPs shall be considered local limits and pretreatment standards. The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system subject to any compliance schedule as established in the industrial user permit. All significant industrial users must comply with these limitations where they are more stringent than applicable state and/or federal regulations.
Parameter
Maximum Daily Concentration
(mg/l)
Parameter
Maximum Daily Concentration
(mg/l)
Arsenic
0.53
Cadmium
0.07
Chromium, total
1.71
Chromium, hexavalent
0.36
Copper
0.50
Cyanide, free
0.23
Lead
0.29
Mercury
0.0028
Molybdemum
0.74
Nickel
0.50
Selenium
0.22
Silver
0.39
Zinc
1.48
 
   (L)   The city has received authority through the U.S. EPA and state statutes to enforce the requirements of 40 CFR Chapter 1, Subchapter N, Parts 405-471, 40 CFR 403, and 40 CFR Part 35. All users shall comply with the requirements of those regulations.
   (M)   Users shall promptly notify the city in advance of any introduction of wastewater constituents or any substantial change in the volume or character of the wastewater constituents being introduced into the POTW. The Operations Manager may deny or condition the new introduction or change in discharge based on the information submitted in the notification or additional information as may be requested. Significant industrial users are required to notify the Operations Manager immediately of any changes at its facility affecting the potential for a slug discharge.
(Ord. No. 17-91, 6-25-91; Am. Ord. No. 12-99, 6-15-99; Am. Ord. No. 13-2009, 8-4-09; Am. Ord. No. 01-13, § 3, 2-5-13; Am. Ord. No. 17-18, § 1, 11-20-18)
§ 31.342 DILUTION OF WASTEWATER DISCHARGE
   No user shall ever 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 in the federal categorical pretreatment standards, or in any pollutant specific limitation developed by the city or state.
(Ord. No. 17-91, 6-25-91)
§ 31.343 GREASE, OIL, AND SAND INTERCEPTORS
   Grease, oil, and sand interceptors shall be provided when, in the opinion of the superintendent, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts, or any flammable wastes, sand, or other harmful ingredients; except that such interceptor shall not be required for private living quarters or dwelling units. All interceptors shall be of type and capacity approved by the superintendent and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors the owner(s) shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall maintain records of the dates, and means of disposal. The city may require reporting of such information for their review. Any removal and hauling of the collected materials not performed by owner(s) personnel must be performed by currently licensed waste disposal firms. Interceptors shall also comply with applicable regulations of the county health department.
(Ord. No. 17-91, 6-25-91)
§ 31.344 SPECIAL INDUSTRIAL PRETREATMENT REQUIREMENTS
   (A)   Pursuant to the requirements imposed on publicly owned wastewater treatment works by the Federal Water Pollution Control Act Amendments of 1972 and later amendments, all pretreatment standards promulgated by the U.S. EPA for new and existing industrial dischargers to public sewer systems are hereby made a part of this chapter. Any industrial waste discharge which violates these EPA pretreatment standards shall be in violation of this chapter.
   (B)   Where pretreatment or flow equalizing facilities are provided or required for any waters or wastes, the industry shall be solely responsible for the continued maintenance in satisfactory and effective operation of such facilities and at their expense. The city may agree to assume these responsibilities if proper and appropriate arrangements for reimbursement of costs are made.
   (C)   (1)   Any person who transports septic tank, seepage pit or cesspool contents, liquid industrial waste or other batch liquid waste and wishes to discharge such waste to the public sewer system shall first have a valid septage hauler's discharge permit. All applicants for a septage hauler's discharge permit shall complete the application form, pay the appropriate fee, and receive a copy of the city's regulations governing discharge to sewers of liquid wastes from trucks. All persons receiving such permits shall agree, in writing, to abide by all applicable provisions of this chapter, and any other special provisions that may be established by the city as necessary for the proper operation and maintenance of the sewerage system. In addition any person holding a valid permit and wishing to discharge to the wastewater treatment plant must submit to the chief operator a sample of each load prior to discharge. A fee and payment schedule shall be established in the permit to cover cost of the required analysis.
      (2)   It shall be illegal to discharge any batch liquid waste into any manhole or other part of the public sewer system, or any building sewer or other facility that discharges to the public sewer system, except at designated points of discharge specified by the city for such purpose. Any liquid waste hauler illegally discharging to the public sewer system or discharging wastewater not authorized in the permit shall be subject to immediate revocation of discharge privileges and further subject to the penalties and enforcement actions prescribed in § 31.399 including fines and imprisonment.
      (3)   Waste haulers who have been granted permission to discharge to the public sewer system shall pay fees for such discharge in accordance with a fee schedule established by the superintendent and approved by the city.
      (4)   Nothing in this chapter shall relieve waste haulers of the responsibility for compliance with county health department, state, or federal regulations.
(Ord. No. 17-91, 6-25-91)
§ 31.345 PROTECTION FROM ACCIDENTAL AND SLUG DISCHARGES
   (A)   (1)   Each significant user shall provide protection from accidental and/or slug discharges of prohibited materials or other substances regulated by this chapter which adversely affects the POTW. Facilities to prevent accidental and/or slug discharges of prohibited materials shall be provided and maintained at the owner or user's own cost and expense. Once every two (2) years, the superintendent will determine whether each industrial user needs to develop or update a plan to control slug discharges. If the superintendent determines that a slug control plan or revision is necessary the plan shall contain the following:
         (a)   Description of discharge practices
         (b)   Description of stored chemicals
         (c)   Procedures for notifying POTW
         (d)   Prevention procedures for spills
      (2)   In the case of all possible or actual accidental and/or slug discharges, it is the responsibility of the user to immediately telephone and notify the POTW of the incident. The notification shall include location of discharge, type of waste, concentration and volume, and corrective actions.
   (B)   Within five (5) days following an accidental discharge, the user shall submit to the superintendent a detailed written report describing the cause of the discharge and the measures to be taken by the user to prevent similar future occurrences. This notification shall not relieve the user of any expense, loss, damage, or other liability which may be incurred as a result of damage to the POTW, fish kills, or any other damage to person or property; nor shall such notification relieve the user of any fines, civil penalties, or other liability which may be imposed by this division, the Enforcement Response Plan or other applicable law.
   (C)   A notice shall be permanently posted on the user's bulletin board or other prominent place advising employees whom to call in the event of a dangerous discharge. Employers shall insure that all employees who may cause or suffer such a dangerous discharge to occur are advise of the emergency notification procedure.
(Ord. No. 17-91, 6-25-91)
§ 31.346 STATE REQUIREMENTS
   State requirements and limitations on discharges shall apply in any case where they are more stringent than federal requirements and limitations or those in this chapter.
(Ord. No. 17-91, 6-25-91)
§ 31.347 CITY'S RIGHT OF REVISION
   The city reserves the right at the recommendation of the superintendent to establish by majority vote of its council, more stringent limitations, or requirements on discharges to the POTW if deemed necessary to comply with the objectives presented in this chapter.
(Ord. No. 17-91, 6-25-91)
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