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§ 50.107 DISCHARGE OF UNPOLLUTED WATERS.
   (A)   No person shall discharge or cause to be discharged any stormwater, groundwater, roof runoff, subsurface drainage, cellar drainage of groundwater origin, cooling water, or unpolluted industrial process water to any sanitary sewer. The Superintendent or his agent shall have the right at any time to inspect connections to building sewers and require disconnection of any pipes carrying such water to the building sewer.
   (B)   Stormwater and all other unpolluted drainage shall be discharged to those sewers as are specifically designated as storm sewers, or to a natural outlet approved by the utility. Industrial cooling water or unpolluted process water may be discharged, upon approval by the utility, to a storm sewer or natural outlet.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.108 PROHIBITED DISCHARGES.
   Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described water or waste to any public sewer:
   (A)   Any liquid or vapor having a temperature higher than 40° C. (105° F.).
   (B)   Any waters or wastes which may contain more than 100 parts per million by weight of fat, oil, or grease.
   (C)   Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas, which by reason of their nature or quality may cause fire or explosion or be in any other way injurious to persons, the sewage works structures, or the operation of these works.
   (D)   Any garbage that has not been properly shredded.
   (E)   Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastic, wood, hair, entrails, paunch manure, or any solid or viscous substance capable of causing obstruction to the flow in sewers, or other interferences with the proper operation of the sewage works.
   (F)   Any waters or wastes having a pH lower than 5.0 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 works.
   (G)   Any waters and 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 that will pass through the sewage treatment works to create hazard in the receiving waters of the sewage treatment plant, or exceed the state or interstate requirements for the receiving stream.
   (H)   Any waters or wastes containing suspended solids of a character and quantity that unusual attention or expense is required to handle these materials at the sewage treatment plant.
   (I)   Any noxious or malodorous gas or substance which, either singly or by interacting with other wastes, is capable of creating a public nuisance or hazard to life or preventing entry into sewers for their maintenance and repair.
   (J)   Any waters or wastes containing cyanide in excess of a concentration determined by multiplying 0.2 parts per million by the ratio of the average flow in the receiving stream to the design flow of the sewage treatment works.
   (K)   Any toxic radioactive isotopes, without special permit.
   (L)   Any waters or wastes containing fluoride in excess of a concentration determined by multiplying l.2 parts per million by the ratio of the average flow in the receiving stream to the design flow of the sewage treatment works.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.109 DISCHARGES SUBJECT TO APPROVAL.
   The admission into the public sewers of any wastes or waters having any of the following characteristics shall be subject to the review and approval of the utility.
   (A)   A five-day biochemical oxygen demand greater than 300 parts per million by weight.
   (B)   Containing more than 350 parts per million by weight of suspended solids or a chlorine demand greater than 50 parts per million.
   (C)   Containing any quantity of substances having the characteristics described in § 50.063.
   (D)   Having an average daily flow greater than 2% of the average daily sewage flow of the city.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.110 PRELIMINARY TREATMENT.
   (A)   Where necessary, in the opinion of the utility, the owner shall provide, at his expense, such preliminary treatment as may be necessary to provide the following results:
      (1)   Reduce the biochemical oxygen demand to 300 parts per million, the suspended solids to 350 parts per million, and the chlorine demand to 50 parts per million by weight.
      (2)   Reduce the objectionable characteristics or constituents to within the maximum limits provided in § 50.063;
      (3)   Control the quantities or rates of discharge of such waters or wastes.
   (B)   Plans, specifications, and any other pertinent information relating to the proposed preliminary treatment facilities shall be submitted for the approval of the utility and of the State and County Health Departments. No construction of preliminary treatment facilities shall be commenced until these approvals are obtained in writing.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.111 MAINTENEANCE OF PRELIMINARY TREATMENT FACILITIES.
   Where preliminary treatment facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.112 CONTROL MANHOLES.
   The owner of any property served by a building sewer carrying industrial wastes shall install a suitable control manhole in the building sewer to facilitate observation, sampling, and measurement of the wastes. The control manhole shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the utility. 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.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
§ 50.113 GREASE, OIL, AND SAND INTERCEPTORS.
   (A)   Grease, oil, and sand interceptors shall be provided when, in the opinion of the utility, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand, and other harmful ingredients. However, interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the utility, and shall be located so as to be readily and easily accessible for cleaning and inspection.
   (B)   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. Covers on sand traps only may be omitted unless opening creates a hazard.
   (C)   Where installed, all grease, oil, and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.
(Ord. 610.3, passed 3-5-62; Am. Ord. 12-1986, passed 10-9-86) Penalty, see § 50.999
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