§ 7-144. Discharge of wastes declared harmful by approving authority prohibited; specific wastes enumerated.

No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely in the opinion of the approving authority that such wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming his opinion as to the acceptability of these wastes, the approving authority will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances prohibited are:

(1)

Any liquid or vapor having a temperature higher than one hundred fifty (150) degrees Fahrenheit (sixty-five (65) degrees centigrade).

(2)

Any waters or wastes containing fats, wax, grease or oils, whether emulsified or not, in excess of one hundred (100) mg/l or containing substances which may solidify or become viscous at temperatures between thirty-two (32) and one hundred fifty (150) degrees Fahrenheit (one (1) and sixty-five (65) degrees centigrade).

(3)

Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower or greater shall be subject to the review and approval of the approving authority.

(4)

Any waters or wastes containing strong acids, iron pickling wastes, or concentrated plating solutions whether neutralized or not.

(5)

Any waters or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the approving authority for such materials.

(6)

Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the approving authority, as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal, or other public agencies of jurisdiction for such discharge to the receiving waters.

(7)

Any radioactive wastes or isotopes of long half-life (over one hundred (100) days) without special permit. The radioactive isotopes I and P used at hospitals are not prohibited if properly diluted at the source.

(8)

Any waters or wastes having a pH in excess of 9.5.

(9)

Materials which exert or cause:

a.

Unusual concentrations of inert suspended solids (such as, but not limited to, fuller's earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).

b.

Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).

c.

Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.

d.

Unusual volume of flow or concentration of wastes constituting slugs as defined herein.

(10)

Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.

(11)

Any waste prohibited by Environmental Protection Agency Standards as set forth in 40 CFR 403, reference to which is hereby made.

(Code 1965, § 25-84; Ord. No. 93-0021, § 5, 9-21-93)