(A) Prohibitions and limitations. Except as hereinafter provided, no person shall discharge or cause to be discharged to any public sewer any of the following described substances, wastes or waters:
(1) Any liquid or vapor having a temperature higher than 160° Fahrenheit;
(2) Any waters or wastes containing more than 50 milligrams per liter of fats, oils, greases or waxes;
(3) Any gasoline, benzene, naptha, fuel oil or mineral oil or any other flammable or explosive liquid, solid or gas;
(4) Any noxious or malodorous gas or substance which, either alone or by interaction with other wastes, is capable of creating a public nuisance or hazard to life or of preventing entry into sewers for their maintenance and repair;
(5) Any garbage that has not been properly ground;
(6) Any ashes, cinders, sand, mud, straw, shavings, wood, metal, glass, rags, feathers, tar, plastics, paunch manure, butcher’s offal or any other solid or fiscous substances capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewerage system or the wastewater treatment plant;
(7) Any waters or wastes containing phenols in excess of 0.50 milligrams per liter;
(8) Any waters or wastes having a pH lower than 6 or higher than 9 or having any other corrosive property capable of causing damage or posing hazards to the structures, equipment or personnel of the sewage works;
(9) Any copper in excess of 1 milligram per liter in any wastes discharged into a public sewer;
(10) Any zinc in excess of 5 milligrams per liter in any wastes discharged into a public sewer;
(11) Any chromium (hexavalent) in excess of 1 milligram per liter in any wastes discharged into a public sewer;
(12) Any chromium (trivalent) in excess of 2 milligrams per liter in any wastes discharged into a public sewer;
(13) Total chromium in any wastes discharged into a public sewer shall not be in excess of 3 milligrams per liter;
(14) Any nickel in excess of 1 milligram per liter in any wastes discharged into a public sewer;
(15) Any lead in excess of 0.1 milligram per liter in any wastes discharged into a public sewer;
(16) Any cadmium in excess of 0.02 milligrams per liter in any wastes discharged into a public sewer;
(17) Any cyanides, as CN ions, in excess of 1 milligram per liter in any wastes discharged into a public sewer;
(18) Any waters or wastes containing acid metallic pickling wastes or concentrated plating solutions;
(19) Any toxic radioactive isotopes, without a special permit. The radioactive isotopes I 131 and P 32 used in hospitals are not prohibited if they are properly diluted before being discharged into the sewerage system;
(20) Any waters or wastes containing any toxic substances in quantities that are sufficient to interfere with the biochemical processes of the wastewater treatment plant or that will pass through the plant into the receiving stream in amounts exceeding the standards set by federal, interstate, state or other competent authority having jurisdiction. Any waters or wastes containing iron or any other toxic ions, compounds or substances in concentrations or amounts exceeding the limits established from time to time by the Board of Public Works, but in no event shall the limits exceed those set forth in Appendix C of the Federal Guidelines for Pretreatment of Pollutants Introduced into Publicly Owned Treatment Works, published October 1973, or exceed the limits and restrictions set forth in the town’s NPDES permit No. IN0039772;
(21) Any waters or wastes that for a duration of 5 minutes or more have a concentration more than 5 times the average concentration of the BOD or the suspended solids of the customer's sewage discharged during a 24-hour period of normal operation; and/or
(22) Any waters or wastes containing suspended solids of such character and quantity that unusual provision, attention and expense would be required to handle such materials at the wastewater treatment plant, its pumping stations or other facilities.
(B) Responsibility for obstructing or damaging sewers. If a public sewer becomes obstructed or damaged because any of the aforementioned substances were improperly discharged, the person or persons responsible for such discharge shall be billed and shall pay for the expenses incurred by the town in cleaning out, repairing or rebuilding the sewer.
(C) Special agreements. No statement contained in this section shall be construed as prohibiting any special agreement or arrangement between the town and any person whereby an industrial waste of unusual strength or character may be accepted by the town for treatment either with or without pretreatment, provided there is no impairment of the functioning of the sewage works by reason of the admission of such wastes and no extra costs are incurred by the town without recompense by the person.
(D) All or certain industrial wastes may be excluded when conditions are such that NPDES permit restrictions cannot be met.
(Ord. 11-3-75, passed 11-3-1975) Penalty, see § 51.99