(a) The discharge into the sanitary sewage system of any storm water, surface water, ground water, roof run-off, subsurface drainage, cooling water or unpolluted sewage as hereinabove defined, is hereby prohibited.
(Ord. 73-53. Passed 5-7-73.)
(b) The discharge into the sanitary sewage system of industrial waste of such character as to be deleterious to the normal operation of the treatment plant is hereby prohibited, and the Board of Public Affairs shall require such rectification of such industrial waste before the discharge thereof into the sanitary sewage system as to render them properly susceptible to treatment without damage to the treatment plant processes or structure of the sanitary sewage system.
(c) No person shall discharge or cause to be discharged to any public sewer any of the following substances, materials, waters and wastes.
(1) Any water or wastes which contains grease or oil or other substance that will solidify or become discernibly viscous at temperatures between 32 degrees to 150 degrees Fahrenheit.
(2) Any water or wastes which contain emulsified grease or oil or exceeding on analysis or average of 100 parts per million (833 pounds per million gallons) of either soluble matter. The poundage permitted per day from any establishment may be subsequently limited depending upon either soluble content of the sewage delivered to the sewage treatment works.
(3) Any gasoline, benzene, naphtha, fuel oil or mineral oil, or other flammable or explosive liquid, solid or gas.
(4) Any water or wastes that contain more than ten parts per million by weight of the following gases: hydrogen, sulfide, sulphur dioxide or nitrous oxide.
(5) Any garbage that has not been properly comminuted or triturated.
(6) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other inteference with the proper operation of the sewage works.
(7) Any water or wastes that contain phenols in excess of 0.50 parts per million (500 parts per billion). These limits may be modified if the aggregate of contributions throughout the area of service create treatment difficulties or produce a plant effluent discharge to the receiving waters which may be prohibitive.
(8) Any waters or wastes, acid or alkaline in reaction, and having corrosive properties capable of causing damage of hazard to structure, equipment and personnel of the sewage treatment plant, free acids and alkalies of such wastes must be neutralized at all times within a permissible range of pH between 5.5 and 9.5.
(9) Any water or wastes containing a toxic or poisonous substance or of high chlorine demand in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals or create any hazard in the receiving waters or storm water overflows or the effluent of the sewage treatment plant. Materials such as copper, zinc, chromium and similar toxic substances shall be limited to the following average quantities in the sewage as it arrives at the treatment plant and at no time shall the hourly concentration at the sewage treatment plant exceed three times the average concentration:
Iron as Fe | 15 parts per million |
Chromium as Cr | 5 parts per million |
Copper as Cu | 3 parts per million |
Zinc as Zn | 2 parts per million |
Chlorine demand | 30 parts per million |
Contributions of the above toxic substances from individual establishments shall be subject to control in volume and concentration by the Superintendent.
(10) Any cyanides, in excess of two parts per million by weight (measured as CN) in the wastes from any outlet into the public sewers.
(11) Any water or wastes containing the discharge of strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.
(12) Any waters containing suspended or dissolved solids of such character and quantity that unusual provision, attention or expense is required to handle such materials at the sewage treatment plant.
(13) Any noxious or malodorous gas or substance, which either singly 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.
(14) Any toxic radioactive substance without special permit.
(15) Any water or wastes which are discharged continuously at a rate exceeding 100 gallons per minute.
(d) Concentrated dye wastes, spent tanning solutions or other wastes which are highly colored, or wastes which are of unusual volume, concentration of solids or composition or unusual in B.O.D. shall be subject to special review by the Superintendent and the Board of Public Affairs for:
(1) Approval or rejection of admission to the public sewers; or
(2) Modification at the point of origin to permit admission; or
(3) Pretreatment by owner to permit admission.
(e) Any water or wastes which by interaction with other water or wastes in the public sewer system, releases obnoxious gases as provided in subsection (c)(4) hereof, or develops color of undesirable intensity, or forms suspended solids in objectionable concentration, or creates any other condition deleterious to structures and treatment processes shall be subject to control or shall be debarred from the system as determined by the Superintendent.
(f) Any water or wastes conforming to conditions stipulated in subsection (c)(1) through (15) hereof, but whose concentration of suspended solids, B.O.D. or chlorine demand at the municipal sewage treatment plant causes a persistent monthly increase in the average daily analysis of any of these constituents, in excess of two percent of the annual daily average for the previous year, shall be the cause for special review and study as to prohibition, or pretreatment at its source, or acceptance under a special agreement with the Board of Public Affairs.
(g) Plans, specifications and any other pertinent information relating to pretreatment facilities shall be submitted for the approval of the Superintendent and the Water Pollution Control Commission of the State, and no construction of such facilities shall be commenced until such approvals are obtained in writing.
(h) Where preliminary treatment facilities are provided for any water or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expenses, and shall be subject to periodic inspection by the Superintendent.
The owner shall maintain operating records and shall submit to the Superintendent of the sewage treatment plant, a monthly summary report of the character of the influent and effluent, as may be prescribed by the Superintendent to show satisfactory performance of the treatment facilities.
(i) Grease, oil and sand interceptors or traps shall be provided when, in the opinion of the Superintendent of the sewage treatment plant, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts or any flammable wastes, sand and other harmful ingredients except that such interceptors or traps shall not be required for private living quarters or dwelling units. All interceptors or traps shall be of a type and capacity approved by the Superintendent of the sewage treatment plant and shall be located as to be readily and easily accessible for cleaning and inspection.
Grease and oil interceptors or traps shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, water-tight and equipped with easily removable covers which, when bolted in place, shall be gas-tight and water-tight.
Where installed, all grease, oil and sand interceptors or traps shall be maintained by the owner, at his expense, in continuously efficient operation at all times. (Res. 66-24. Passed 5-2-66.)