No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water, impounded water or unpolluted industrial process waters to any sanitary sewer without written permission of the Sewer Commission.
Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
Any liquid or vapor having a temperature lower than 32° F. or higher than 150° F.
Any water or waste which may contain more than one 100 milligrams per liter by weight of fats, oils or grease.
Any gasoline, benzene, naphtha, fuel oil, waste petroleum products from automotive service stations or garages or other flammable or explosive liquid, solid or gas.
Any garbage that has not been properly shredded.
Any ashes, cinders, sand, mud, grit, straw, offal, shavings, metal, glass, rags, feathers, tar, plastics, wood, sawdust, manure or other solid or viscous substance capable of causing obstruction of the flow in sewers or other interference with the proper operation of the sewage system, in the opinion of the Director and/or Sewer Commission.
Any water or wastes having a pH lower than 6.0 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage system, in the opinion of the Director and/or Sewer Commission.
Any water or wastes containing a toxic or poisonous substance 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 sewage system, in the opinion of the Director and/or Sewer Commission.
Any water or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant.
Any noxious or malodorous gas or substance.
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Director in compliance with applicable state or federal regulations.
Grease, oil and sand interceptors shall be provided when, in the opinion of the Director and/or Sewer Commission, they are necessary for the proper handling of wastes containing grease in excessive amounts or any flammable wastes, sand, grit and other harmful ingredients. All interceptors shall be of a type and capacity approved by the Sewer Commission and shall be located so as to be readily and easily accessible for cleaning and inspection. Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight and equipped with easily removable covers, which, when bolted in place, shall be gastight and watertight. Grease and oil interceptors shall be constructed in any place or building having a capacity to serve group meals.
Where installed, all grease, oil, sand and grit interceptors shall be maintained by the owner at his expense in continuous efficient operation at all times. Materials collected shall not be reintroduced into the sewage system.
The admission into the public sewers of any waters or wastes having a five-day biochemical oxygen demand greater than 300 milligrams per liter by weight or containing more than 350 milligrams per liter by weight of suspended solids or containing any quantity of substance having the characteristics described in § 92-26 of this article or having an average daily flow greater than 2% of the average daily sewage flow of the sewer system shall be subject to the review and approval of the Sewer Commission.
Where necessary in the opinion of the Sewer Commission, the owner shall provide, at his expense, such preliminary treatment as may be necessary to reduce the biochemical oxygen demand to 300 milligrams per liter by weight or reduce objectionable characteristics or constituents to within the maximum limits provided for in this section or control the quantities and rates of discharge of such waters or wastes.
Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the Sewer Commission, together with a letter from the New York State Department of Health approving the proposed preliminary treatment facilities, and no construction of such facilities shall be commenced until said approvals are obtained in writing.
Where preliminary treatment facilities are required for any waters or wastes, no permit will be granted until such pretreatment units have been placed in operation and have demonstrated their effectiveness by test. The cost of such testing, sampling and analyzing shall be borne by the waste contributor.
Said preliminary treatment facilities shall be maintained continuously and satisfactorily in effective operation by the owner at his expense.
When required by the Sewer Commission, the owner of any property served by a building sewer carrying commercial or industrial wastes shall install a suitable control manhole in the building sewer to facilitate observation, sampling and measurement of the wastes. Such manhole, when required, shall be conveniently and safely located. It is to be constructed in accordance with plans approved by the Sewer Commission. The manhole 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.
All measurements, tests and analyses of the characteristics of water and wastes to which reference is made in §§ 92-26 and 92-28 shall be determined in accordance with Standard Methods for the Examination of Water and Sewage or with methods approved by the New York State Department of Health and may be determined at the control manhole provided for in § 92-30 or upon suitable samples taken at said manhole. In the event that no special manhole has been required, the control manhole may be considered to be the nearest downstream manhole in the public sewer to be the point at which the building sewer is connected. If, in the judgment of the Director, analyses must be performed which are beyond the scope of the laboratory at the sewage treatment plant, these analyses shall be performed at a laboratory designated by the Director, and the costs of these analyses shall be borne by the owner.
No statement contained in this section shall be construed as preventing any special agreement or arrangement between the Sewer Commission and any industrial, commercial or domestic concern whereby waste which is of unusual strength or character can be accepted by the Sewer Commission for treatment subject to payment therefor by such concern.