A.   No person shall discharge or cause to be discharged any unpolluted waters such as stormwater, surface water, groundwater, roof runoff, subsurface drainage, or cooling water to any sewer, except stormwater runoff from limited areas, which stormwater may be polluted at times, may be discharged to the sanitary sewer by permission of the director of public works and the Montana state department of health.
   B.   Stormwater other than that exempted under subsection A of this section, and all other unpolluted drainage shall be discharged to such sewers as are specifically approved by the director of public works, to a storm sewer, combined sewer, or natural outlet.
   C.   No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
      1.   Pollutants which create a fire or explosion hazard including, but not limited to, waste streams with a closed cup flashpoint of less than one hundred forty degrees Fahrenheit (140°F) or sixty degrees Celsius (60°C) using the test methods specified in 40 CFR 261.21. These wastes include, but are not limited to, gasoline, benzene, naphtha, fuel oil, etc., in solid, liquid or gaseous form.
      2.   Toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to contaminate the sludge of any town system, to injure or interfere with any sewage treatment process, or equipment, constitute a hazard to humans or animals, create a public nuisance, or result in the pass-through of inadequately treated wastes to receiving waters.
Each user which discharges any toxic pollutants which cause an increase in the cost of managing the effluent or the sludge of the town of Terry treatment works shall pay for such increased costs.
      3.   Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the wastewater facilities such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
   D.   The following described substances, materials, waters and wastes shall be limited in discharges to town systems to concentrations or quantities which will not harm either the sewers, the sludge of any town system, the wastewater treatment process or equipment, will not have an adverse effect on the receiving stream, or will not otherwise endanger lives, limb, public property, or constitute a nuisance. The director of public works 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. In forming his opinion as to the acceptability, the director of public works will give consideration to such factors 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, and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the director of public works are as follows:
      1.   Wastewater having a temperature higher than one hundred fifty degrees Fahrenheit (150°F) (65°C).
      2.   Wastewater containing petroleum oil, nonbiodegradable cutting oils, or products of mineral oil origin.
      3.   Wastewater from industrial plants containing floatable oils, fat, or grease.
      4.   Any garbage that has not been properly shredded (see definition of "properly shredded garbage" in section 7-4-1 of this chapter). Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
      5.   Any waters or wastes containing toxic or deleterious substances to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the director of public works for such materials.
      6.   Any waters or wastes containing pollutants which result in the presence of toxic or obnoxious gases, vapors or fumes within the POTW in quantities which may cause acute worker health and safety concerns or public nuisance.
      7.   Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the director of public works in compliance with applicable state or federal regulations.
      8.   Quantities of flow, concentrations, or both which constitute a "slug" as defined in section 7-4-1 of this chapter.
      9.   Waters and wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over the receiving waters.
      10.   Any waters 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 structures and treatment processes.
      11.   Pollutants which cause corrosive structural damage to the POTW but in no case discharges with pH lower than 5.0 unless the POTW is specifically designed to accommodate such discharges.
      12.   Any trucked or hauled wastes unless the POTW is designed to adequately treat the wastes and the facility has points designated for such discharges.
   E.   If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in subsection D of this section, and which in the judgment of the director of public works may have a deleterious effect upon the wastewater facilities, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the director of public works may:
      1.   Reject the wastes;
      2.   Require pretreatment to an acceptable condition for discharge to the public sewers;
      3.   Require control over the quantities and rates of discharge; and/or
      4.   Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of subsection K of this section.
If the director of public works permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the director of public works and the Montana state department of health.
   F.   Grease, oil, and sand interceptors shall be provided when, in the opinion of the director of public works, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts as specified in subsection D3 of this section, or any flammable wastes, sand or other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the director of public works and the Montana state plumbing code, and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors, the owner shall be responsible for the proper removal and disposal by appropriate means of the captivated material and shall maintain records of the dates and means of disposal which are subject to review by the director of public works. Any removal and hauling of the collected materials not performed by owner personnel must be performed by currently licensed waste disposal firms.
   G.   Where pretreatment or flow equalization facilities are provided or required for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
   H.   When required by the director of public works, the owner of the property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. Such structures, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the director of public works. The structure shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times.
   I.   The director of public works may require a user of sewer services to provide information needed to determine compliance with this chapter. These requirements may include:
      1.   Wastewater's discharge peak rate and volume over a specified time period.
      2.   Chemical analyses of wastewaters.
      3.   Information on raw materials, processes, and products affecting wastewater volume and quality.
      4.   Quantity and disposition of specific liquid, sludge, oil, solvent, or other materials important to sewer use control.
      5.   A plot plan of sewers of the user's property showing sewer and pretreatment facility location.
      6.   Details of wastewater pretreatment facilities.
      7.   Details of systems to prevent and control the losses of materials through spills to the town sewer.
   J.   All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with the latest edition of "Standard Methods For The Examination Of Water And Wastewater", published by the American Public Health Association. Sampling methods, location, times, durations, and frequencies are to be determined on an individual basis subject to approval by the director of public works.
   K.   No statement contained in this section shall be construed as preventing any special agreement or arrangement between the town and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the town for treatment. (Ord., 6-9-1998)