(A)   Unless otherwise required or approved, the delivery of all industrial wastes from the producer to the town sanitary sewer shall be at a reasonably uniform rate, as produced, without storage by the producer, except that storage which is necessary in the pretreatment plant of the producer.
   (B)   It shall be unlawful to discharge or cause to be discharged any subsurface drainage, storm or ground water, down spout or roof runoff, yard sprinklers, drains, fountains or ponds into any sanitary sewer excluding combined storm and sanitary sewers. Water from swimming pools, boiler drains, blow-off pipes or cooling water from various equipment may be discharged into the sanitary sewer by an indirect connection whereby such discharge is cooled, if required, and flows into the sanitary sewer at a rate not to exceed the design capacity of the sanitary sewer, provided that the waste does not contain materials or substances in suspension or solutions in violation of the limits prescribed by this subchapter.
   (C)   It shall be unlawful to discharge or cause to be discharged into any town sewer any of the following described substances, materials, waters, or wastes:
      (1)   Any liquid or vapor having a temperature higher than 113° F. (45° C.).
      (2)   Any water or waste which contains wax, grease, oil, plastic or other substances that will solidify or become discernible viscous at a temperature between 60° F. to 90° F.
      (3)   Flammable or explosive liquid, solids, or gas, such as gasoline, kerosene, benzine, naphtha, etc.
      (4)   Solid or viscous substances such as ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, whole blood, paunch manure, hair and fleshlings, entrails, lime slurry, lime residues, slops, chemical residues, paint residues, fiberglass, or bulk solids.
      (5)   Wastes from garbage grinders, except those wastes generated in the preparation of foods that are generally consumed on the premises, and not unless it has been properly comminuted or shredded to reduce all food scraps and like particles to 3/16-inch or less in greatest dimensions. Garbage grinders shall not be used for grinding plastics, paper products, garden refuse, hospital or veterinarian refuse, or similar refuse for disposal into a town sanitary sewer.
      (6)   Any noxious or malodorous substance which can form a gas; or which either singly or by interaction with other wastes, is capable of causing objectionable odors or hazard to life and property; or which forms solids in concentrations exceeding limits established herein; or which creates any other condition deleterious to structure or treatment processes; or which requires unusual facilities, attention, or expense to handle such materials.
   (D)   Except in quantities or concentrations as herein authorized, it shall be unlawful for any individual or corporation to discharge waters or wastes to the sanitary sewer containing:
      (1)   Free or emulsified oil and grease on analysis an average of 200 mg/l (1,666 pounds per million gallons) of either or both or combinations of free or emulsified oil and grease, if such wastes:
         (a)   Deposit grease or oil in the sewer lines in such manner as to obstruct the sewers;
         (b)   Overload the dischargers; skimming and grease handling equipment;
         (c)   Are not amenable to biological treatment and will therefore pass to the receiving waters without being affected by normal sewage treatment processes; or
         (d)   Have adverse effects on the treatment process due to the excessive quantities.
      (2)   Acids or alkalies which attach or corrode sewers or sewage disposal structures or have a pH value lower than 6.0 or higher than 10.0, or which, due to contents, may be reduced or changed with age or by sewage, to produce acid or alkaline reactions.
      (3)   (a)   Salts of the heavy metals, in solution or suspension, in concentrations exceeding the following, the analytical results to be expressed in terms of the element indicated:
Element               mg/l
Arsenic               0.05
Barium                  5.0
Boron                  1.0
Cadmium               0.02
Chromium               5.0
Copper                  1.0
Lead                  0.10
Manganese               1.0
Mercury               0.005
Nickel                  1.00
Selenium               0.02
Silver                  0.10
Zinc                  5.0
         (b)   No other heavy metals or toxic materials may be discharged to the sewer system without an industrial waste permit which shall specify permitted concentrations.
      (4)   Cyanides or cyanogen compounds capable of liberating hydrocyanic gas or acidification in excess of two mg/l as CN in the wastes from any outlet into the town sewers.
      (5)   Radioactive materials exceeding the existing standards of the state.
      (6)   Any wastewaters containing phenols or other taste producing substances in such concentrations as to produce odor or taste in the effluent as to affect the taste and odor of the receiving waters.
      (7)   Discharges which exert or cause:
         (a)   Excessive discoloration;
         (b)   Unusual BOD or an immediate oxygen demand;
         (c)   Unusual concentrations of solids or composition; as an example, in total suspended solids of inert nature (such as Fuller's Earth) and/or in total dissolved solids (such as sodium sulfate);
         (d)   High hydrogen sulfide content; or
         (e)   Unusual flow and concentration.
      (8)   Any substance which is not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable to treatment only to such degree that the wastewater treatment plant cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters without first retreating to a concentration acceptable to the town.
      (9)   Materials which exert or cause excessive discoloration such as, but not limited to, dye wastes and tanning solutions.
(Ord., passed 3-8-82)