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Local Discharge Limits

City of Clearwater
Industrial Pretreatment/Sewer Use Ordinance
Discharge to Sanitary Sewer - Uniform Local Limits

Parameter

Local Limit (mg/l)

1,4-Dichlorobenzene

1.2

Arsenic

0.12

Cadmium

0.2

CBOD

4162

Chloride

1787

Chromium

1.6

Copper

0.1

Cyanide, Total

0.04

d-Limonene

26

Iron

50

Lead

0.2

Manganese

1.1

Mercury

0.00025

Methyl-t-butyl ether

2

Molybdenum

0.1

Nickel

0.1

Selenium

0.4

Silver

0.4

Total Kjeldahl Nitrogen

550

Total Phosphorus

70

Total Suspended Solids

3772

Zinc

0.4

Surcharge Limits

Parameter Limit Surcharge Rate
BOD 5 >250 mg/l $ 0.32/lb
TSS >250 mg/l $ 0.32/lb
Total Nitrogen > 35 mg/l $ 0.50/lb
Fats, Oil, Grease > 100 mg/l $ 1.46/lb

*Surcharge is calculated by the average day in excess of the limit [(mg/l above limit) x 8.34 x H2O] x surcharge rate. H2O consumption expressed as million gallons i.e., 70,000 gals = .07 mg.

Prohibited Discharge Standards

General Prohibitions

No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes 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 any other National, State, or local pretreatment standards or requirements.

Specific Prohibitions

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 flashpoint of less than 140 F (60 C) using the test methods specified in 40 CFR 261.21
  2. Wastewater having a pH less than 5.5 or more than 9.5, 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 but in no case solids greater than three-eighths of an inch (3/8") or ninety-five-one-hundredths of a centimeter (0.95 cm) in any dimension;
  4. 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 the POTW;
  5. Wastewater having an average temperature greater than 122 F (50 C), at the point of connection with the City's sanitary sewer system;
  6. Petroleum oil, non-biodegradable 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 in a quantity that may cause acute worker health and safety problems;
  8. Trucked or hauled pollutants, except at discharge points designated by the Coordinator in accordance with Section 32.213(4) of this Division;
  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 wastewater 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, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, non-contact cooling water, and unpolluted wastewater, unless specifically authorized by the Coordinator;
  13. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
  14. Medical wastes, except as specifically authorized by the Coordinator in a wastewater discharge permit;
  15. Wastewater, alone or in conjunction with other sources, causing the POTW's effluent to fail a toxicity test;
  16. Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW;
  17. Fats, oils, or greases of animal or vegetable origin in excess of the established local limit, or in quantities which can impede or impair flow.

Note: Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.