A user shall not discharge, or caused to be discharged directly or indirectly to a city facility any of the following:
A. Any liquids, solids, or gases which by reason of their nature or quantity are, or may be sufficient either alone or by interaction with other substances to cause fire or damage to city facilities or to be injurious to human health and safety or to the operation of city facilities. At no time shall two successive readings of the air in manhole or sewer pipe on an explosive hazard meter at the point of discharge into the system (or at any point in the system) be more than five percent nor any single reading over ten percent of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to gasoline, kerosene, naphtha, benzene, toluene, zylene, ethers, alcohol's, ketoses, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, and sulfides and any other substances which the city, the state or EPA has notified the user is a fire hazard or a hazard to the system;
B. Any solid or viscous substance in amounts or concentrations which may cause or threaten to cause obstruction to the flow in sewer or pass-through of, or interference with the operations of any city facility such as, but not limited to, feathers, ashes, cinder, sand, spent limestone or marble dust, metal, glass, straw, shavings, grass clippings, rags, waste paper, plastic, wood, tar, asphalt, residues from refining or processing of fuel or lubricating oil, petroleum oil, nonbiodegradeable cutting or machine oils, products of mineral origin, mud, cement grout, glass grinding or polishing wastes, grease, garbage with particles greater than one-half inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, or whole blood;
C. Any wastewater having a pH less than 5.5 or equal to or greater than 12.5, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment, humans or animals;
D. Any wastewater containing toxic pollutants in sufficient quantity, either by itself or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to human or animal health or safety, create an adverse effect on the waters of the state, or to exceed the limitations set forth in a national pretreatment standard;
E. Any wastewater having a temperature which will inhibit biological activity in the treatment plant resulting in interference or pass-through, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed forty degrees Centigrade (one hundred and four degrees Fahrenheit), or with a temperature at a point of discharge to the city's collection system which exceeds sixty-five degrees Centigrade (one hundred fifty degrees Fahrenheit);
F. Any pollutants, including oxygen demanding pollutants (BOD, COD, etc.) released at a flow rate and/or pollutant concentration which alone or in combination with others, may cause interference or pass-through the treatment plant;
G. Any discharge which results in toxic gases, vapors or fumes in a quantity that may cause acute worker health and safety problems within any city facility;
H. Any noxious or malodorous liquids, gases, or solids;
I. Any wastewater containing any radioactive wastes or isotopes;
J. Any stormwater, groundwater, rain water, street drainage, subsurface drainage yard, swimming pool drainage, and spa or diatomaceous earth filter backwash, unless a specific permit is issued by the city. The city may approve such discharge only when no reasonable alternative is available or such water is determined to constitute a pollution hazard if not discharged to the sewer;
K. Any unpolluted water, including but not limited to cooling water, process water or blow down from cooling towers or evaporative coolers, or any other unpolluted water, unless a permit for such has been obtained from the city prior to the discharge. The city may approve the discharge of such water only when no reasonable alternative method of disposal is available or in the determination of the city, it is unacceptable;
L. Any septic waste, holding tank waste, portable toilet waste, 'grease interceptor wastes, or oil and sand interceptor waste is unacceptable;
M. Any waste defined as hazardous, by any definition set forth in federal and/or state statutes or regulations, unless such wastes has been decertified by the appropriate federal or state agency and or a variance has been granted by the federal or state agency, including provisions for discharge to a city facility, and the variance provisions are approved by the city;
N. Any substance, waste, wastewater, or constituent thereof which may be itself or in combination with other discharges cause the city to violate any permit conditions related to the toxicity of the effluent, or otherwise cause or contribute to the potential for toxic substances being released from city facilities into the environment in toxic amounts. (Ord. 01-102 § 2(part), 2001).