§ 21-58. General sewer use requirements.  

Effective on Tuesday, November 1, 2022
  • (a) Prohibited discharge standards. No industrial user shall introduce or cause to be introduced into the WWTP any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all industrial users of the WWTP whether or not they are subject to categorical pretreatment standards or any other national, state or local pretreatment standards or requirement. 
    (b) Specific prohibitions. No user shall introduce or cause to be introduced into the WWTP the following pollutants, substances, or wastewater: 

    (1) Pollutants which create a fire or explosive hazard in the municipal wastewater collection and WWTP, including, but not limited to, waste streams with a closed-cup flashpoint of less than 140 degrees F using test methods specified in 40 CFR 261.21; 
    (2) Any wastewater having a pH less than 5.0 or more than 10.5, or otherwise causing corrosive structural damage to the WWTP or equipment, or endangering city personnel. If wastewater is less than or equal to 2.0 or greater than or equal to 12.5 then wastewater is defined as hazardous waste in accordance with 40 CFR 261.22 and all discharges must cease and desist until the pH can be adjusted into non-hazardous waste range. 
    (3) Solid or viscous substances in amounts which will cause obstruction of the flow in the WWTP resulting in interference, but in no case solids greater than 0.5 inches or 1.27 centimeter in any dimension. 
    (4) Any wastewater containing pollutants, including oxygen demanding pollutants (BOD, etc.), 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 either the WWTP; or any wastewater treatment or sludge process, or which will constitute a hazard to humans or animals. 
    (5) Any wastewater having a temperature greater than 150° F (65° C), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104° F (40° C). 
    (6) Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through. 
    (7) Any pollutants which result in the presence of toxic gases, vapors or fumes within the WWTP in a quantity that may cause acute worker health and safety problems. 
    (8) Any trucked or hauled pollutants, except at discharge points designated by the city in accordance with section 21-70(e). 
    (9) Any 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, a hazard to life, or to prevent entry into the sewers for maintenance and repair. 
    (10) Any 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. Color (in combination with turbidity) shall not cause the treatment plant effluent to reduce the depth of the compensation point for photosynthetic activity by more than ten (10) percent from the seasonably established norm for aquatic life. 
    (11) Any wastewater containing any radioactive wastes or isotopes except as specifically approved by the Superintendent in compliance with applicable State or Federal regulations. 
    (12) Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted industrial wastewater, unless specifically authorized by the Superintendent. 
    (13) Any sludges, screenings, or other residues from the pretreatment of industrial wastes. 
    (14) Any medical wastes, except as specifically authorized by the Superintendent in a wastewater discharge permit. 
    (15) Any wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test. 
    (16) Any wastes containing detergents, surface active agents, or other substances which may cause excessive foaming in the WWTP. 
    (17) Any hazardous waste pharmaceuticals from healthcare facilities and reverse distributors. 
    (18) Limits of any discharge of fats, oils or greases of animal or vegetable origin can be found in the "industrial wastewater limitations table" incorporated by reference and adopted herein on file in the city clerk's office. 

    Wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the WWTP. All floor drains located in process or materials storage areas must discharge to the industrial user's pretreatment facility before connecting with the WWTP. 

    (c) Federal categorical pretreatment standards. The national categorical pretreatment standards found at 40 CFR Part 403.6, as of July 1, 2009, and 40 CFR Chapter I, Subchapter N, Parts 405-471 are hereby incorporated. 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 in accordance with 40 CFR 403.6(e). 
    (d) State requirements. Any and all State pretreatment standards which may be adopted from time to time are hereby incorporated. 
    (e) Specific pollutant limitations. Pollutant limits shall be established to protect against pass through and interference. No person shall discharge wastewater containing pollutants in excess of said limits. Schedules containing specific pollutant limits, as established by ordinance shall be kept on file in the office of the city clerk. Any changes to said limits will be developed with public notice as required by 62-625.400-(3) F.A.C. Local limits will be applied at the point where the wastewater enters the publically owned treatment works. 
    (f) City's right of revision. The city reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent standards or requirements on discharges to the WWTP if deemed necessary to comply with the objectives presented in section 21-68(b) of this ordinance or the general and specific prohibitions in section 21-59(a) of this ordinance. 
    (g) Special agreement. The city reserves the right to enter into special agreements with industrial users setting out special terms under which they may discharge to the WWTP. In no case will a special agreement waive compliance with a pretreatment standard or requirement. However, the industrial user may request a net gross adjustment to a categorical standard in accordance with 62-625.820 F.A.C. They may also request a variance from the categorical pretreatment standard from EPA. Such a request will be approved only if the industrial user can prove that facts relating to its discharge are fundamentally different from the factors considered by EPA when establishing that pretreatment standard. An industrial user requesting a fundamentally different factor variance must comply with the procedural and substantive provisions in 62-625.700 F.A.C. 
    (h) Dilution. No industrial 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 industrial users which are using dilution to meet applicable pretreatment standards or requirements or in other cases when the imposition of mass limitations is appropriate. 

(Ord. No. 2022-49, § 1, 11-01-22)