(A) No user shall contribute or cause to be contributed, directly or indirectly to the POTW, any pollutant or wastewater which will pass through or cause interference with the operation or performance of the POTW.
(B) No user shall contribute the following substances to the POTW:
(1) Any substances which by reason of their nature or quantity may create a fire or explosion hazard or be injurious to the POTW or to the operation of the POTW, including but not limited to, wastestreams with a closed cup flashpoint of less than 140º F or 60º C using the test methods specified in 40 CFR 261.21.
(2) Any solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the waste treatment facilities such as, but not limited to: grease, garbage with particles greater than one-half inch in any dimension, or any material which can be disposed of as trash.
(3) Any wastewater having a pH less than 5.0 or greater than 10 or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the POTW.
(4) Any substance which may cause a public nuisance, cause hazard to life or prevent entry into the sewers for maintenance and repair.
(5) Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW Treatment Plant exceeds 40º C (104º F) unless the Approval Authority, upon request of the POTW, approves alternate temperature limits.
(6) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through.
(7) Pollutant which results in the presence of toxic gases, vapors, or fumes within the POTW 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 POTW.
(9) Any pollutant, including oxygen demanding pollutants released in a discharge at a flow rate and/or concentration (including any slug load), which may cause interference to the POTW.
(10) Any wastewater having effluent characteristics in excess of:
Constituent | Maximum |
BOD TSS Oil and grease pH | Plant design criteria |
Copper Cadmium Nickel Zinc Chromium Arsenic Barium Mercury Selenium Silver Cyanide | To be calculated from data collected from a headworks loading analysis |
Other pollutants (specify) | To be calculated from data collected from a headworks loading analysis |
(11) (a) The city has developed and shall enforce the following local limits to implement the general and specific prohibitions contained in this chapter.
Constituent | Maximum Limits |
Constituent | Maximum Limits |
Total phosphorous | 5.9 mg/l |
CBOD5 | 300 mg/l |
Total suspended solids | 300 mg/l |
Oil and grease | 10.0 mg/l |
Copper | 0.189 lbs./day |
Cadmium | 0.0023 lbs./day |
Nickel | 0.32 lbs./day |
Zinc | 1.1 lbs./day |
Chromium | 1.2 lbs./day |
Arsenic | 0.27 lbs./day |
Barium | 1.0 mg/l |
Mercury | Non detect level |
Selenium | 0.0 mg/l |
Silver | 0.005 lbs./day |
Cyanide | 0.137 lbs./day |
pH | Max. 10.0; Min. 5.0 |
Trichloroethylene | 9.5 lbs./day |
Lead | 0.27 lbs./day |
(b) For all pollutants, limitations shall be established by individual contract or permit based upon information required by this chapter and sound engineering practices.
(Ord. passed 2-8-94; Am. Ord. passed 1-11-2000; Am. Ord. passed 6-25-02) Penalty, see § 51.99