DEP regulations on prohibited substances in public sewers

NYC 9/11 Public Portal Document

(h) Any waters or wastes having a pH lower than 4.5 or higher than 9.5 or having any other corrosive property apt to cause dam­ age or hazard to structures, equipment of the sewer system, or personnel employed in its operations; TITLE IV (i) Any liquids or wastes containing toxic or poisonous sub­ stances in sufficient quantity or rate of flow as to injure or inter­ MATERIALS AND SUBSTANCES EXCLUDED fere with any of the sewage treatment processes to constitute a FROM PUBLIC SEWERS hazard to human beings or animals, or to create any hazard in the receiving waters; SECTION 4.1 Except as hereinafter provided no person shall (j) Any liquids or wastes containing suspended solids of such discharge or cause to be discharged, or allow to run, leak, or quality and/or quantity that become burdensome in the opera­ escape into any public sewer, pipe, channel, sewer appurtenance tion and maintenance of the sewage treatment plant facilities; or waterway connecting with any public sewer, or into any private sewer connected with a public sewer any of the following de­ (k) Any noxious or malodorous gas or substance capable of cre­ scribed materials, substances or wastes except such small quan­ ating a public nuisance; tities as may be present in normal household wastes; (1) Any natural waters including lake and swamp drainage, or (a) Construction materials, ashes, cinders, sand, mud, straw, recycled river, harbor or ocean waters; shavings, metal, glass, rags, feathers, tar, plastic, wood, paunch (m) Any water or substance, which in the opinion of the Com­ manure, coffee grounds, fur, wax, or any solids or viscous sub­ missioner, will result in a discoloration or other undesirable stances capable of causing obstruction to the flow in sewers or physical change in the appearance of the receiving stream; other interference with the proper operation of the sewer system; (b) Dumping of snow and ice into public sewers at unauthorized SECTION 4.2 Under no circumstances will the discharge of locations; »■ garbage or refuse, whether shredded or unshredded, be permitted into the sewer system. The installation of “garbage grinders” for (c) Any gasoline, benzine, naptha, fuel oil, or other inflam­ the purpose of grinding or shredding garbage before discharge mable or explosive liquids, solids or gases; into the sewer system is expressly prohibited. (d) Steam or hot water above 150° Fahrenheit; SECTION 4.3 When in the opinion of the Commissioner the (e) Any waste or water which may contain petroleum hydro­ solids in an industrial waste require comminution before discharge carbons, such as greases, oil and oil sludges from garages, repair to the sewer system, not only must the necessary comminution shops, machine shops, industrial establishments in concentrations facilities be approved for adequacy but also the operating results in excess of 100 mg. per liter. However, fats and greases, such as must satisfactorily abate the problem which such solids may those derived from cooking and food processing, may be dis­ tend to create in the sewer system. charged to City sewers, provided that the concentration and physi­ cal dispersion of the fats and greases does not result in separation SECTION 4.4 Any physical connection to a public sewer, or to and the adherence to sewer structures or appurtenances. If there a private sewer connected to a public sewer, from vessels, tanks or is evidence of adherence of such materials to said structures, or containers receiving any of the hereinbefore mentioned materials if such materials cause blockage in the sewer system, then the and substances from which quantities of the aforesaid prohibited waste water carrying such materials must be effectively treated materials or substances could accidently be discharged directly by a proces.s or device, such as a grease trap or interceptor, before or indirectly into the public sewers is prohibited. Precautions its discharge to City sewers; shall be taken to prevent the accidental spillage of any of the (f) Coal tar, its derivatives and waste; hereinbefore mentioned material to floor drains, bc^sins, down­ spouts, gutters, etc., from any manufacturing process or storage (g) Paints and waste products from paint manufacturing; vessel. 12 13

NYC-WTC_000165541