Sec. 29.131. - Prohibited discharge standards.

General prohibitions. No user shall introduce or cause to be introduced into the POTW, directly or

indirectly, any pollutant or wastewater that causes pass through or interference with the operation or performance of the POTW. 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 that create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed-cup flashpoint of less than one hundred forty (140) degrees F (sixty (60) degrees C) using the test methods specified in 40 CFR 261.21. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances that the city, the state or EPA has notified the user is a fire hazard or a hazard to the system;

(2)

Any wastewater having a pH less than five (5.0) or greater than twelve (12.0), or otherwise causing corrosive damage or hazard to structures, equipment, and/or personnel of the POTW;

(3)

Solid or viscous substances in amounts that will cause obstruction of the flow to the POTW resulting in interference; such as, but not limited to, grease, garbage with particles greater than one-half (½) inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass

clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, gas, tar, asphalt residues, residues from refining, or processing of fuel or lubricating oil, mud, or glass grinding or polishing wastes;

(4)

Any pollutants, including oxygen-demanding pollutants (BOD, etc.) released at a flow rate and/or pollutant concentration which will cause interference with the POTW. In no case shall a slug load have a flow rate or contain concentration or qualities of pollutants that exceed for any time period longer than fifteen (15) minutes more than five (5) times the average twenty-four-hour concentration, quantities, or flow during normal operation;

(5)

Wastewater having a temperature that will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater that causes the temperature at the introduction into the treatment plant to exceed one hundred four (104) degrees F (forty (40) degrees C);

(6)

Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through or any substance that will cause the POTW to violate any disposal permit or the receiving water quality standards;

(7)

Pollutants that 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;

(9)

Noxious or malodorous liquids, gases, solids, or other wastewater that, 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 that imparts color that cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, that 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, groundwater, artesian well water, roof runoff, subsurface drainage, salt water swimming pool drainage, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by water utilities director;

(13)

Sludges, screenings, unreasonably large amounts of suspended solids or other residues from the pretreatment of industrial wastes;

(14)

Medical wastes, except as specifically authorized by water utilities director in a wastewater discharge permit;

(15)

Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail toxicity test;

(16)

Detergents, surface-active agents, or other substances that may cause excessive foaming in the POTW;

(17)

The brine from a nonresidential self-regenerative type water softener or cooling tower or the brine from the residential use of self-generative type water softeners not complying with the requirements of state law;

(18)

Any wastewater containing toxic pollutants in sufficient quantity to, either singly or by interaction with other pollutants, injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or exceed the limitation set forth in a categorical pretreatment standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Act;

(19)

Any material inducing a high pH and or that causes incrustations, scales or precipitates on sewer walls or other adverse effects on the wastewater system.

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.

(Ord. No. 11-OR0603-1, § 3, 8-17-2011; Ord. No. 18-OR0022-1, § 2, 1-10-2018)