The following described substances, materials, waters or waste shall be limited in discharges to municipal systems to concentrations or quantities which shall not harm either the sewers, wastewater treatment process or equipment, shall not have an adverse effect on the receiving stream or shall not otherwise endanger lives, limb, public property or constitute a nuisance. The Administrator may set limitations lower than the limitations established in the regulations below if in his opinion such more severe limitations are necessary to meet the above objectives. Deliberate dilution with unpolluted water to meet the concentrations established in the regulations below shall not be acceptable. In forming his opinion as to the acceptability, the Administrator shall give consideration to such facts as the quantity of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of treatability of the waste in the wastewater treatment plant and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewater discharged to the sanitary sewer which shall not be violated without approval of the Administrator are as follows:
(a) Wastewater having a temperature higher than 150o F;
(b) Wastewater containing more than fifty milligrams per liter of petroleum oil, nonbiodegradeable cutting oils, product of mineral oil origin or floatable oils, fat, wax or grease; or
(c) Any waters or wastes containing solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the wastewater treatment plant, including but not limited to cyanides, hexavalent chromium, copper, zinc, cadmium, nickel and phenols in the wastes as discharged to the public sewer. The following concentrations shall not be exceeded in wastes discharged to the public sewers:
Metals | |
Cadmium | 2 mg/l |
Chromium Hexavalent | 10 mg/l |
Chromium Total | 25 mg/l |
Copper | 3 mg/l |
Nickel | 10 mg/l |
Iron | 50 mg/l |
Zinc | 15 mg/l |
Lead | 2 mg/l |
Cyanide | |
Cyanide (Cl | |
2
amenable)
2 mg/l
Total Cyanide
10 mg/l
Phenols
50 mg/l
Solvents
Carbon Tetrachloride
maximum combined
Tetrachloroethylene
concentration is
Trichloroethylene
1 mg/l
Methylene Chloride
25 mg/l
1, 1, 1, Trichloroethane
25 mg/l
Chlorobenzene
25 mg/l
Creosols
25 mg/l
Cresylic acid
25 mg/l
Nitrobenzene
25 mg/l
Toluene
25 mg/l
Carbon disulfide
25 mg/l
Isobutanol
25 mg/l
Spent chlorofluorocarbon
solvents
25 mg/l
Methyl Ethyl Ketone
25 mg/l
The maximum combined solvent
limitation is
250 mg/l
These maximum concentrations may be changed as necessary by the Administrator, the Code of Regulations from NEORSD or State regulatory agencies based on new information concerning inhibitory substances or to protect treatment plant processes. Industrial discharges covered by Federal pretreatment requirements shall meet those limitations specified under the effluent guidelines published under Title 40 CFR Part 403 of the Federal Act or the above concentrations whichever is more stringent. Major contributing industries discharging incompatible pollutants into the public sewers shall be regulated as provided in Section 926.09.
The Administrator may impose mass limitations on discharges where dilution occurs in order to meet the Pretreatment Standards or Requirements of this Code, or in other cases where the imposition of mass limitations is deemed appropriate by the Administrator.
(d) Any water or wastes which by interaction with other waters or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system or create a condition deleterious to workers, structures and treatment processes;
(e) Any radioactive wastes or isotopes of such half-life or concentrations as may exceed limits in compliance with applicable State or Federal regulations;
(f) Quantities of flow, concentrations or both which constitute a "slug" as defined herein; or
(g) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(Ord. 5-1991. Passed 1-17-91.)