§ 10.04.02. General discharge prohibitions.

No user shall discharge or cause to be discharged, directly or indirectly, any of the following described substances into the wastewater disposal system or to any public sewer:

A.

Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious ill any other way to the wastewater disposal system or to the operation of the system. At no time, shall two successive readings on an explosion hazard meter, at the point of discharge into the system or at any point in the system, be more than five percent nor any single reading over ten (10) percent of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, tohlene, xylene, ethers, alcohols, kefones, aldehydes, perozides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides.

B.

Solid or viscous substances which will or may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as, but not limited to, grease, garbage with particles greater than one-half-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, waste paper, wood, plastic, gas tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.

C.

Any wastewater having a ph less than six or more than nine, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the wastewater disposal system.

D.

Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to inhibit or disrupt any wastewater treatment process, constitute a hazard to humans or animals, or create a toxic effect in the receiving waters of the wastewater disposal system. A toxic pollutant shall include, but not be limited to any pollutant identified in A.S.A. § 82-1901 et seq. or in regulations of the state department of pollution control and ecology pursuant to its authority.

E.

Any noxious or malodorous liquids, gases, or solids which either singly or by interaction with other wastes are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair.

F.

Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes, and vegetable tanning solutions.

G.

Any wastewater which creates conditions at or near the wastewater disposal system which violate any statute or any rule, regulation or ordinance of any public agency or state or federal regulatory body.

H.

Any wastewater having a temperature greater than one hundred fifty (150) degrees F (65.6 degrees C), or causing, individually or in combination with other wastewater, the influent at the wastewater treatment plant to have a temperature exceeding one hundred four (104) degrees F (forty (40) degrees C).

I.

Any slug load, which shall mean any pollutant, including oxygen demanding pollutants (BOD, etc.), released in a discharge of such volume or strength as to cause inhibition or disruption in the wastewater disposal system. In no case shall a slug load have a flow rate or contain concentrations or quantities of pollutants that exceed for any time period longer than fifteen (15) minutes more than five times the average twenty-four (24) hour concentrations, quantities, or flow of the user during normal operation.

J.

Non-contact cooling water or unpolluted storm or groundwater.

K.

Any wastewater containing fats, wax, grease, or oils, whether emulsified or not, in excess of fifty (50) mg/l or containing substances which may solidify or become viscous at temperatures between thirty-two (32) degrees F and one hundred fifty (150) degrees F (zero (0) degrees C and 65.6 degrees C); and any wastewater containing oil and grease concentrations of mineral origin of greater than one hundred (100) mg/l whether emulsified or not.

L.

Wastewater containing inert suspended solids or of dissolved solids in such quantities that they would cause disruption with the wastewater disposal system.

M.

Any wastewater having a BCD5 greater than two hundred fifty (250) mg/l or having a suspended solids concentration of greater than two hundred fifty (250) mg/l, except as provided elsewhere herein.

In addition to these prohibitions, no user shall discharge to any public sewer any discharge which causes interference, as defined, with the wastewater disposal system. Pollutants in the effluent from an industrial user shall not be considered to cause interference where the industrial user is in compliance with specific prohibitions or standards developed by federal, state, or local governments. Where the industrial user is in compliance with such specific prohibitions or standards, and pollutants in the effluent from the industrial user's facility nevertheless are determined to have caused or significantly contributed to a violation of any requirement of the city's NPDES or state disposal system permit, and are likely to cause such a violation in the future, the city must take appropriate action to develop and enforce specific effluent limits for that industrial user to ensure renewed and continued compliance with the city's NPDES or state disposal system permit.

( Ord. No. 94-27, § 2.01 )