Whenever industrial waste, such as waste from a meat packing plant, lead reclaiming plant, laundry, soap factory or from any other business or industrial establishment, is produced in such quantities as will injuriously affect the treatment of sewage in the city sewage treatment plant, the receiving sanitary or storm sewer or which may produce conditions dangerous or prejudicial to life or health, such wastes shall receive pretreatment satisfactory to the city engineer before discharge to the city sanitary or storm sewer.
(1965 Code, sec. 15-207)
Except as provided in this section, no person shall discharge or cause to be discharged any of the following described waters or wastes to any sanitary sewer:
(1) 
Any liquid or vapor having a temperature higher than 150 degrees F.
(2) 
Any water or waste which may contain more than (100) parts per million by weight, of fat, oil or grease.
(3) 
Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
(4) 
Any garbage that has not been properly shredded in a machine designed for this purpose.
(5) 
Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewerage works.
(6) 
Any waters or wastes having a pH lower than 5.5 or higher than 9.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the sewerage works.
(7) 
Any waters or wastes containing more than 5.0 parts per million by weight of chromium or 2.0 parts per million by weight of cyanides or 12.0 parts per million of phenols or 5.0 parts per million of iron or 1.0 parts per million by weight of copper.
(8) 
Any waters or wastes containing any quantity of formaldehyde or carbide wastes.
(9) 
Any waters 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 receiving waters of the sewage treatment plant.
(10) 
Any noxious or malodorous gas or substance capable of creating a public nuisance.
(11) 
The admission into the sanitary sewers of any waters or wastes having (a) a 5-day biochemical oxygen demand greater than 300 parts per million by weight or (b) containing more than 400 parts per million by weight of suspended solids, or (c) containing any quantity of substance having the characteristics described in this section, or (d) having an average daily flow greater than 2% of the average daily sewage flow of the city, shall be subject to the review and approval of the city engineer. When necessary in the opinion of the city engineer, the owner shall provide, at his expense such preliminary treatment as may be necessary to, (a) reduce the biochemical oxygen demand to 300 parts per million and the suspended solids to 400 parts per million by weight, or (b) reduce objectionable characteristics or constituents to within the maximum limits provided for in this section, or (c) 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 city engineer, and no construction of such facilities shall be commenced until approval is obtained in writing.
(1965 Code, sec. 15-209)
Drains receiving acid waste shall be constructed of an acid resisting material. Such drains located outside of a building shall be constructed of vitrified clay or earthenware pipe or other approved acid resisting material. Joints shall be constructed by calking with asbestos rope wicking and by pouring a heated sulphur and carbon compound or a heated bituminous compound in such manner as to secure tight joints. In no case shall corrosive waste be discharged into a drain, sanitary sewer, storm sewer, or soil or, waste pipe without being first diluted or neutralized in such manner as to render said wastes noncorrosive. These wastes shall be treated by passing through a properly trapped dilution or neutralizing catch basin which shall function automatically. Plans and specifications of said neutralizing basin of any other proposed treatment method shall be furnished by the owner or occupant to the city engineer for approval.
(1965 Code, sec. 15-211)