§ 311-18. Prohibitions on wastewater discharges.

No person shall discharge or deposit or cause or allow to be discharged or deposited into the wastewater treatment system any wastewater which contains the following:

A. 

Explosive mixtures: 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 in any other way to the wastewater treatment 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 public sewer system be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter. 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.

B. 

Toxic substances: any toxic substances in amounts exceeding standards promulgated by the Administrator of the United States Environmental Protection Agency pursuant to the Act [now Section 307(a)] and chemical elements or compounds, phenols or other taste- or odor-producing substances or any other substances which, singly or by interaction with other wastes, are not susceptible to treatment or which may interfere with the biological processes or efficiency of the wastewater treatment system or that will pass through the system without being treated to the required degree.

C. 

Corrosive wastes: any wastes which will cause corrosion or deterioration of the wastewater treatment system. All wastes discharged to the public sewer system must have a pH value in the range of 6.0 to 9.0 standard units. Prohibited materials include, but are not limited to, acids, sulfides, concentrated chloride and fluoride compounds and substances which will react with water to form acidic products.

D. 

Solid or viscous wastes: solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the wastewater treatment system, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, whole blood, hair and fleshings or hides, animal guts or tissues, entrails, bones, spent lime, stone or marble dust, grass clippings, spent grains, spent hops, wastepaper, asphalt residues, residues from refining or processing of fuel or lubricating oil and similar substances. This prohibition includes any wastewater which, by interaction with other waters or wastes in the wastewater treatment system, forms suspended solids which obstruct the flow in the sewer or create a condition that interferes with the proper operation of the wastewater treatment system.

E. 

Oil and grease: any wastewater containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32° and 150° F. (0° and 65° C.).

F. 

Excessive temperature: any wastewater causing the temperature in the public sewer to exceed 150° F. (65° C.) or the temperature of the influent to the treatment facilities to exceed 104° F. (40° C.).

G. 

Improperly shredded garbage: garbage that is not properly shredded garbage as heretofore defined.

H. 

Noxious materials: noxious or malodorous solids, liquids or gases which, either singly or by interaction with other wastes, are capable of creating a public nuisance or hazard to any form of life or are or may be sufficient to prevent entry into a sewer for its maintenance and repair.

I. 

Radioactive wastes: radioactive wastes or isotopes of such half-life or concentration that they do not comply with regulations or orders issued by the appropriate authority having control over their use and/or which will or may cause damage or hazards to the wastewater treatment system or personnel operating the system.

J. 

Excessive discharge rate: quantities of wastewater flow or concentrations, or both, which constitute a slug as defined herein.

K. 

Discolored material: waste with color, such as but not limited to dye water or vegetable tanning solution, that is not removable by the treatment process.