(A) Waste water discharges generally. No person shall discharge or deposit, or cause or allow to be discharged or deposited, into the waste water treatment system any waste water which contains the following, except as provided under § 51.092:
(1) Any clothing, rags, textile remnants or waste, cloth or scraps, except fibers of scrap that will pass through a one-fourth inch mesh screen or its equivalent in screening ability;
(2) Any liquid or vapor having a temperature higher than 150ºF or 65ºC;
(3) Any waters or wastes which may contain a total fat, wax, grease or oil concentration of more than 100 mg/l, whether emulsified or not, or containing substances which may solidify or become viscous at temperatures between 32ºF and 150ºF (0ºC and 65.5ºC) at the point of discharge into the system;
(4) 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 in any other way to the sewerage facilities 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 sewer system, be more than 5% or 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, zylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides;
(5) Any garbage that has not been ground or comminuted to a degree that all particles will be carried freely in suspension under flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension;
(6) Any solid or viscous wastes which will or may cause obstruction to the flow in a sewer, or otherwise interfere with the proper operation of the waste water treatment system. Prohibited materials include, but are not limited to, grease, uncomminuted garbage, animal guts and tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone of marble dust, metal, glass, straws, shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastic, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil and similar substances;
(7) Any waters or wastes in which the suspended solids exceed 300 milligrams per liter;
(8) Any waters or wastes in which the total fixed solids exceed 1,500 milligrams per liter;
(9) Any waters or wastes in which the B.O.D. exceeds 300 milligrams per liter;
(10) Any waters or wastes in which the C.O.D. exceeds 600 milligrams per liter;
(11) Any waters or wastes in which the TKN exceeds 40 milligrams per liter;
(12) Any waters or wastes in which the I.O.D. exceeds five milligrams per liter;
(13) Any waste which will cause corrosion or deterioration of the treatment system. All wastes discharged to the public sewer must have a pH value in the range of six to nine 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 acid products; and
(14) Any waters or wastes containing amounts of potentially toxic elements exceeding the maximum concentrations for the respective drainage basins as outlined below:
Grant Creek | |
Substance | Maximum Concentration |
Grant Creek | |
Substance | Maximum Concentration |
Antimony | 4.2 mg/l |
Aluminum | 31.5 mg/l |
Cadmium | 0.2 mg/l |
Hexavalent chromium | 0.1 mg/l |
Chromium | 5.0 mg/l |
Copper | 5.0 mg/l |
Mercury | 0.1 mg/l |
Nickel | 5.0 mg/l |
Lead | 1.4 mg/l |
Silver | 0.1 mg/l |
Zinc | 0.9 mg/l |
(B) Minimum allowable concentrations. Industries subject to federal categorical pretreatment standards shall not exceed the maximum allowable concentrations listed for the respective type of industry when those concentrations differ from those listed above:
(1) Any waters or wastes containing total cyanide or cyanide compounds in excess of 0.1 mg/l;
(2) Any toxic substances in amounts exceeding standards promulgated by the administrator of the United States Environmental Protection Agency pursuant to § 307(a) of the Clean Water Act, being 33 U.S.C. § 1317(a), and chemical elements or compounds, phenols or other taste- or odor-producing substances, or any other substances which are not susceptible to treatment or which may interfere with the biological processes or efficiency of the treatment system, or which may pass through the system and harm persons, livestock or aquatic life utilizing the receiving stream;
(3) Any 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 life, or are or may be sufficient to prevent entry into a sewer for its maintenance and repair;
(4) Any radioactive wastes or isotopes of the half-life or concentration that they do not comply with regulations or orders issued by the appropriate authority having control over their use or which will or may cause damage or hazards to the sewerage facilities or personnel operating the system;
(5) Any solid radioactive materials or radioactive materials in solution which can be removed by chemical means and disposed of in solid form;
(6) Any materials which form excessive amounts of scum or foam that may interfere with the operation of the waste treatment works or cause undue additional labor in connection with its operation. Excessive amounts shall be determined by the Director;
(7) Any waters or wastes containing suspended solids of the character and quality that unusual attention or expense is required to handle the materials at the waste treatment plant;
(8) Any waters or wastes containing dyes or other color of the character and in the quantity as to prevent removal by biological processes and which require special chemical treatment to pass receiving stream standards;
(9) Any waste water at a flow rate or containing the concentration or quantity of any pollutant that exceeds for any period of time longer than 15 minutes more than five times the average 24-hour concentration, quantity or flow during normal operation and that would cause a treatment process upset and subsequent loss of treatment efficiency;
(10) Any unpolluted water, including, but not limited to, water from cooling systems or of storm water origin, which will increase the hydraulic load on the treatment system; and
(11) Any waters or wastes in which the ammonia exceeds 15 milligrams per liter.
(C) Inflow of storm water, ground water and the like. No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water or unpolluted industrial or commercial process water into any sanitary sewer. No person shall connect or cause to be connected to the sanitary sewer system any pipe or conduit which will allow the discharge of the inflow sources into the sanitary sewer system.
(D) Limitations on waste water pollutants. No person shall discharge or convey, or permit or allow to be discharged or conveyed, to a public sewer any waste water containing pollutants of the character or quantity that will:
(1) Not be susceptible to treatment or interfere with the process or efficiency of the treatment system;
(2) Constitute a hazard to human or animal life or to the stream or watercourse receiving the treatment plant effluent;
(3) Violate pretreatment standards, as promulgated by the United States Environmental Protection Agency or the state; and
(4) Cause the treatment plant to violate its NPDES permit or applicable receiving water standards.
(E) Special arrangements. Nothing in this section shall be construed as preventing any special agreement or arrangement between the town and any user of the waste water treatment system whereby waste water of unusual strength or character is accepted into the system and specially treated, subject to any payments or user charges as may be applicable. However, any special agreements or arrangements shall not be less stringent than any applicable federal pretreatment standard or categorical regulation pursuant to § 307 of the Clean Water Act, being 33 U.S.C. § 1317.
(Prior Code, § 15-38) (Ord. passed 10-7-1985)