No person shall discharge or cause to be discharged from any point any of the following described wastewaters to any public sanitary sewers:
(1) Any liquid or vapor having a discharge temperature higher than one hundred twenty (120) degrees Fahrenheit, nor any liquid or vapor having heat in such quantities that the temperature at the treatment plant and influent exceeds one hundred four (104) degrees Fahrenheit.
(2) Any wastewater which contains more than seventy-five (75) mg/l by weight of oil and/or grease, or containing any substance that will solidify or become viscous at temperatures between thirty-two (32) degrees Fahrenheit and one hundred fifty (150) degrees Fahrenheit at the point of discharge into the system.
(3) 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 way to the sewerage facilities or to the operation of the system. At no time shall two (2) successive readings on an explosion hazard meter, at the point of discharge into the sewer system, be more than five (5) percent nor any single reading over ten (10) percent of the Lower Explosive Limit (LEL) of the meter. Such potentially explosive 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.
(4) Any wastewater that contains more than two (2) mg/l by weight, of hydrochloric acid, hydrogen sulfide, sulfur dioxide, or nitrous oxide.
(5) Any ashes, cinders, sand, mud, straw, shavings, metals, glass, tars, plastics, wood, rags, and other fibrous solids, feathers, offal, whole blood, paunch contents, manure, hair and fleshings, entrails, lime slurry and lime residues, beer or distillery slops, chemical residues, fiberglass, paint, paint thinners, latex, lacquers or ink residues, cannery waste, unshredded bulk solids with particles greater than one-half inch in any dimension; discharges from photographic laboratories; or any other solid or viscous substance capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the wastewater collection system and the wastewater treatment facilities.
(6) Any wastewater having a stabilized pH lower than six (6) or higher than nine (9) or having any other corrosive property capable of causing damage or hazard to sewers which are constructed of vitrified clay, cast iron, ductile iron, ABS plastic and/or concrete; associated or connected structures; equipment; and/or personnel of the wastewater collection system, the wastewater treatment facilities, and/or the treatment process.
(7) Any wastewater containing toxic or poisonous substances in such concentrations as to constitute a hazard to humans, animals, fish or birds; or to interfere with any wastewater treatment process; or to create any hazard in the receiving waters of the wastewater treatment plant.
(8) In no event shall any person exceed the following limits on toxic or poisonous substances:
Substance | Fixed Upper Limits for Constituents (mg/l, by weight) |
Ammonia | 30.00 |
Arsenic | 0.05 |
Barium | 1.00 |
Cadmium | 0.02 |
Chlorinated Hydro- carbons | 0.40 |
Chromium (hexavalent) | 0.50 |
Chromium (total) | 1.00 |
Copper | 0.10 |
Cyanide | 0.10 |
Fluorides (total) | 1.00 |
Iron | 3.00 |
Lead | 0.10 |
Manganese | 1.00 |
Mercury | 0.005 |
Methylene Chloride | 0.50 |
Nickel | 1.00 |
Organic Nitrogen | 15.00 |
Phosphates (total) | 10.00 |
Selenium | 0.02 |
Silver | 0.10 |
Sulfates (total) | 100.00 |
Sulfides (total) | 5.00 |
Surfactants | 8.00 |
Zinc | 0.50 |
The limits fixed herein shall be minimum requirements of all industrial users but do not relieve the user from limiting concentrations of these or other elements or chemical substances which may constitute a public health or safety hazard, or interfere with the public wastewater treatment process.
(9) Any noxious or malodorous gas or substance, singly or by interactions with other wastes being capable of creating a public health or safety nuisance or hazard to life or preventing entry into public sanitary sewers for their maintenance, inspection and repair.
(10) Any wastes which are of unusual volume, concentration of solids, or composition that may create obstruction to the flow in sewers or other interference with the proper operation of the wastewater works and the proper treatment of the influent.
(11) Wastewater containing substances which are not responsive to treatment by the wastewater treatment processes employed, or are responsive to treatment to only such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(12) Any wastewater containing more than one thousand five hundred (1,500) mg/l total solids.
(13) Wastewaters at a flow rate or containing such concentrations or quantities of pollutants, that exceed for any time period longer than fifteen (15) minutes more than five (5) times the average twenty-four (24)-hour concentration as defined during normal operation and that would cause a treatment process upset and subsequent loss of treatment efficiency.
(14) Any wastewater containing phenols or other taste producing substances in such concentrations as to produce odor or taste in the effluent as to affect the taste or odor of the receiving water.
(15) Any wastewater containing boron or chlorides in such concentrations as to interfere with any operation of the town's wastewater treatment facility, or to cause the wastewater treatment plant to fail to meet requirements of other agencies having jurisdiction over discharge to the receiving waters.
(16) Radioactive wastes or isotopes of such half-life or concentration that they do not comply with regulations or orders issued by the appropriate state or federal agency having control over their use, and which will or may cause damage or hazards to the sewerage facilities or personnel operating the system.
(17) Any concentrated dye wastes, spent tanning solutions, or other wastes with objectionable color, not removable by the treatment process.
(18) Any wastewater containing polychlorinated biphenyls (PCB's).
(Ord. No. 1992-1, 1-7-92; Ord. No. 2021-09, 5-4-21)