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SEWER USE AND PRETREATMENT REGULATIONS
§ 54.15 PROHIBITED DISCHARGE STANDARDS.
   (A)   No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which cause pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or by any other national, state or local pretreatment standards or requirements.
   (B)   No user shall introduce or cause to be introduced into the POTW the following pollutants, substances or wastewater:
      (1)   Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed-cup flash point of less than 140° F (60° C) using the test methods specified in 40 CFR 261.21;
      (2)   Wastewater having a pH less than 6.0 or more than 10.0, or otherwise causing corrosive structural damage to the POTW or equipment;
      (3)   Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference. Total suspended solids level in excess of 250 mg/l daily average may be subject to a surcharge pursuant to § 54.16;
      (4)   Pollutants, including oxygen-demanding pollutants such as BOD and the like, released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW. BOD levels in excess of 200 mg/l daily average may be subject to a surcharge pursuant to § 54.16;
      (5)   Wastewater having a temperature greater than 140° F (60° C) or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperatures at the introduction into the treatment plant to exceed 104° F (40° C) ;
      (6)   Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
      (7)   Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW sewers, including in a quantity that may cause acute worker health and safety problems;
      (8)   Trucked or hauled pollutants;
      (9)   Noxious or malodorous liquids, gases, solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
      (10)   Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent, thereby violating the city's NPDES permit;
      (11)   Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
      (12)   Storm water, surface water, ground water, artisan well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water and unpolluted wastewater, unless specifically authorized by the Superintendent;
      (13)   Sludges, screenings or other residues from the pretreatment of industrial wastes;
      (14)   Medical wastes, except as specifically authorized by the Superintendent in a wastewater discharge permit;
      (15)   Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test; and/or
      (16)   Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW.
   (C)   A user may not allow an upset of pretreatment system bypass unless the event is unavoidable to prevent loss of life, personal injury or severe property damage.
   (D)   Pollutants, substances or wastewater prohibited by this section shall not be processed or stored in a manner so that they could be discharged to the POTW.
(Ord. 842, passed 4-1-2000)
§ 54.16 ABNORMAL WASTE SURCHARGE.
   (A)   In the event the Approving Authority excludes a customer from the requirements of § 54.16 and the customer discharges abnormal industrial wastes to the public sanitary sewerage system having an average total suspended solids content in excess of 250 mg/l and/or an average of 5-day BOD in excess of 200 mg/l and/or COD in excess of 400 mg/l, the customer shall pay a surcharge based upon the excess strength of his or her wastes.
   (B)   The costs of treatment for each pound of BOD and/or suspended solids removed by the treatment works shall be calculated and reviewed by the city at the end of each fiscal year (January). If a discrepancy exists between the actual costs as found by the city and the estimated costs, the Approving Authority may increase or decrease the surcharge rates sufficiently to cover only the projected actual costs for the ensuing year.
   (C)   No reduction in sewerage service charges, fees or taxes will be permitted because of the fact that certain industrial wastes discharged to the public sanitary sewer system contain less than 250 mg/l of suspended solids or 200 mg/l BOD.
(Ord. 842, passed 4-1-2000)
§ 54.17 NATIONAL CATEGORICAL PRETREATMENT STANDARDS.
   The categorical pretreatment standards found at 40 CFR Chapter 1, Subchapter N, Parts 405-471 are hereby incorporated.
   (A)   Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Superintendent may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
   (B)   When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the Superintendent shall impose an alternate limit using the combined wastestream formula in 40 CFR 403.6(e).
   (C)   A user may obtain a variance from a categorical pretreatment if the user can prove, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
   (D)   A user may obtain a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15.
(Ord. 842, passed 4-1-2000)
§ 54.18 LOCAL LIMITS.
   (A)   The following pollutant limitations are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following daily maximum concentrations based upon a 24-hour composite sample. Additionally, no person shall discharge wastewater containing in excess of the following maximum concentration times a multiplier of 1.5 based upon a grab sample. The 1.5 grab sample multiplier does not apply to hex. chromium, cyanide and phenols in that analytical procedures do not allow for composite techniques to be applied to these parameters. For hex. chromium, cyanide and phenols, three grab sample results shall be analyzed with results not to exceed the following noted limitations:
      (1)   0.08 mg/l arsenic (total);
      (2)   400 mg/l BOD (daily maximum);
      (3)   550 mg/l COD (daily maximum)
      (4)   0.025 mg/l cadmium (total)1;
      (5)   3.0 mg/l hex. chromium1;
      (6)   800 mg/l chloride;
      (7)   3.0 mg/l total chromium1;
      (8)   250 mg/l total suspended solids (daily maximum);
      (9)   0.233 mg/l copper1;
      (10)   0.074 mg/l cyanide (total)1;
      (11)   0.17 mg/l lead (total)1;
      (12)   0.005 mg/l mercury (total)1;
      (13)   0.06 mg/l molybdenum2
      (14)   0.30 mg/l nickel1;
      (15)   100 mg/l oil and grease;
      (16)   1.00 mg/l phenols;
      (17)   0.08 mg/l selenium;
      (18)   2.13 mg/l TTO;
      (19)   0.5 mg/l zinc (total)2
   (B)   In divisions (A)(1) through (19) above, 1 indicates that the limitation is derived from a waste load model based upon 1990 State Water Quality Standards, and 2 indicates that the limitation is derived from a waste load model based upon Federal Sludge Regulations, the same being 40 CFR Part 503.
   (C)   The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for total metal unless indicated otherwise. The Superintendent may impose limitations in addition to, or in place of, the concentration based limitations above.
   (D)   Upon the promulgation of the National Categorical Pretreatment Standard (NCPS) for a particular user, the standard, if more stringent then the limitations imposed under this chapter for sources in that category shall, when effective, immediately supersede the limitations and conditions imposed under this chapter. The Wastewater Superintendent shall notify all known affected users of the applicable permitting and reporting requirements under 40 CFR 403.12.
(Ord. 842, passed 4-1-2000) Penalty, see § 10.99
§ 54.19 CITY'S RIGHT OF REVISION.
   The Board reserves the right to establish, by ordinance, more stringent standards or requirements on discharges to the POTW.
(Ord. 842, passed 4-1-2000)
§ 54.20 DILUTION.
   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 a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. The Superintendent may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.
(Ord. 842, passed 4-1-2000) Penalty, see § 10.99
§ 54.21 PRETREATMENT OF WASTEWATER.
   (A)   Users shall provide wastewater treatment as necessary to comply with this chapter, and shall achieve compliance with all categorical pretreatment standards, local limits, and the prohibitions set out in this chapter 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 the facilities and operating procedures shall be submitted to the Superintendent for review, and shall be acceptable to the Superintendent before the facilities are constructed. The review of the plans and operating procedures shall in no way relieve the user from the responsibility of modifying the facilities as necessary to produce a discharge acceptable to the city under the provisions of this chapter.
   (B)   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 wastestreams from industrial wastestreams, and any other conditions as may be necessary to protect the POTW and determine the user's compliance with the requirements of this chapter.
   (C)   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. A wastewater discharge permit may be issued solely for flow equalization.
   (D)   Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
   (E)   Users which operate vehicular wash facilities shall provide, operate and maintain pretreatment facilities approved by the Superintendent to control solids and preclude the discharge of toxins to the POTW.
   (F)   Users which operate food preparation facilities shall provide, operate and maintain pretreatment facilities approved by the Superintendent to control the discharge of greases, fats, oils and food solids to the POTW.
   (G)   At least once every two years, the Superintendent shall evaluate whether each significant industrial user needs an accidental discharge slug control plan. The Superintendent may require any user to develop, submit for approval and implement the plan. Alternatively, the Superintendent may develop the plan for any user. An accidental discharge/slug 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 Superintendent of any accidental or slug discharge as required by § 54.40; and
      (4)   Procedures to prevent adverse impact from any accidental or slug discharge. The 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. 842, passed 4-1-2000)
§ 54.22 WASTEWATER DISCHARGE PERMITS; INTERJURISDICTIONAL AGREEMENTS.
   (A)   When requested by the Superintendent, a user must submit information on the nature and characteristics of its wastewater within 30 days of the request. The Superintendent is authorized to prepare a form for this purpose and may periodically require users to update this information.
   (B)   No significant industrial user shall discharge wastewater into the POTW without first obtaining a wastewater discharge permit from the State Department of Environmental Management.
   (C)   If another municipality or sewer district contributes wastewater to the POTW, the Superintendent shall enter into an intermunicipal or interdistrict agreement with the contributing entity.
   (D)   Prior to entering into an agreement required by division (C) above, the Superintendent shall request the following information from the contributing entity:
      (1)   A description of the quality and volume of wastewater discharged to the POTW by the contributing entity;
      (2)   An inventory of all users located within the contributing entity that are discharging to the POTW; and
      (3)   Any other information as the Superintendent may deem necessary.
   (E)   An agreement, as required by division (C) above, shall contain the following conditions:
      (1)    A requirement for the contributing entity to adopt a sewer use ordinance which is at least as stringent as this chapter, and local limits which are at least as stringent as those set out in § 54.18. The requirement shall specify that the ordinance and limits must be revised as necessary to reflect changes made to the city's ordinance or local limits;
      (2)   A requirement for the contributing entity to submit a revised user inventory on at least an annual basis;
      (3)   A provision specifying which pretreatment implementation activities, including wastewater discharge permit issuance, inspection and sampling, and enforcement, will be conducted by the contributing municipality; which of these activities will be conducted by the Superintendent, and which of these activities will be conducted jointly by the contributing municipality and the Superintendent;
      (4)   A requirement for the contributing entity to provide the Superintendent with access to all information that the contributing entity obtains as part of its pretreatment activities;
      (5)   Limits on the nature, qualify, and volume of the contributing entity's wastewater at the point where it discharges to the POTW;
      (6)   Requirements for monitoring the contributing entity's discharge;
      (7)   A provision ensuring the Superintendent access to the facilities of users located within the contributing entity's jurisdictional boundaries for the purpose of inspection, sampling and any other duties deemed necessary by the Superintendent; and
      (8)   A provision specifying remedies available for breach of the terms of the intermunicipal or interdistrict agreement.
(Ord. 842, passed 4-1-2000)
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