A. Any pollutant which causes pass through or interference;

B. Any liquid or waste having temperature higher than one hundred four degrees Fahrenheit;

C. Oil and grease concentrations or amounts from industrial facilities violating Federal pretreatment standards; wax, grease or oil concentration of petroleum, non­biodegradable cutting oil, vegetable, or animal origin of more than three hundred milligrams per liter (mg/L) whether emulsified or not, or containing substances which may solidify or become viscous at temperatures between thirty-two degrees and one hundred fifty degrees Fahrenheit (zero and sixty-five degrees centigrade) at the point of discharge into the system; or any waste or water containing grease or oil of animal, vegetable, mineral, or petroleum origin, in excess of three hundred milligrams per liter (mg/L); as measured by the analytical method approved by the Environmental Protection Agency;

D. 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 explosion or be injurious in any other way to the sewerage facilities or to the operation of the system. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the sewer system, be more than five percent nor any single reading over ten percent of the lower explosive limit (LEL) of the meter. When calibrating explosion hazard meters, the meter shall be calibrated using a representative standard of the combustibles expected to be present in the wastewater discharge. If a methane standard is used, the meter alarm shall be set at the lowest LEL for those combustibles expected to be present in the wastewater discharge. Pollutants which create a fire or explosion hazard in the POTW, including but not limited to, waste streams with a closed cup flashpoint of less than one hundred forty degrees Fahrenheit or sixty degrees centigrade using test methods specified in 40 CFR 261.21. Prohibited materials include, but are not limited to: gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides;

E. Any waters or wastes having a pH factor lower than 5.0 or higher than 10.0, or having corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage system;

F. Any waters or wastes containing a 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 or any other part of the sewerage system. Any toxic substances in amounts exceeding standards promulgated by the Administrator of the United States Environmental Protection Agency pursuant to Section 307(a) of the Clean Water Act, and chemical elements or compounds, or other tastes or odor-producing substances, or any other substances which are not susceptible to treatment or which may interfere with the biological processes or efficiency of the wastewater treatment system, or that will pass through the system. Prohibited materials include, but are not limited to: acids, sulfides, concentrated chlorides and fluoride compounds, and substances which will react with water to form acidic products;

G. Any garbage that has not been properly shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-fourth inch in any dimension;

H. Any ashes, cinder, pulp, sand, cement, mud, straw, shavings, metal, glass, rags, feathers, tar, asphalt, resins, plastics, woods, animal hair, paunch manure, or any other substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewerage system;

I. Any wastewater or unpolluted water from the user that dilutes, in any way, the wastewater stream in order to meet District or national discharge standards;

J. Containing more than one thousand parts per million by weight of suspended solids;

K. Exerting a fifteen-minute chlorine demand in excess of twenty parts per million;

L. Having an objectionable color not removable by treatment process which causes discoloration of wastewater treatment effluent such that receiving water quality requirements established by law cannot be met;

M. At a flow rate or containing such concentrations or quantities of pollutants, including oxygen demanding pollutants, as to constitute a slug loading to the treatment system. This is considered to be a pollutant concentration or wastewater flow rate that exceeds, for any time period longer than fifteen minutes, more than five times the average twenty-four hour concentration, quantities of flow during normal operation and that would cause a treatment process upset and subsequent loss of treatment efficiency;

O. Any waters or wastes containing substances including, but not limited to, suspended solids and soluble solids of such character and quality that is not susceptible to treatment or interfere with the process or efficiency of the treatment system, or that unusual attention or expense is required to handle such materials at the treatment plant;

P. Pollutants which will result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems.

Q. Any noxious or malodorous solids, liquids, or gases which, either singly or by interaction with other waste substances, are capable of creating a public nuisance or hazard to life, or are, or may be, sufficient to prevent entry into sewers for its maintenance or repair;

R. Any radioactive wastes or isotopes of such half-life or concentration that they do not comply with regulations or orders issued by the appropriate authority having control over their use and which may cause damage or hazards to the sewage facilities or personnel operating the system;

S. Any water or wastes containing dissolved sulfides in excess of one part per million;

T. Septic tank sludge or effluent, or any trucked or hauled pollutants, except at discharge points designated by the POTW; or

U. Any waste radiator coolant or any radiator wastewater generated from auto, truck or equipment maintenance;

V. Engine and Vehicle Parts Cleaning Waste. Wastewater or other wastes from the cleaning of engines, undercarriages or vehicle parts. Such wastes must be either recycled in a closed-loop recycling system or hauled off­site for proper disposal;

W. Hazardous Waste. Hazardous waste as defined by the California Code of Regulations (CCR) at CCR 6261.3. (Ord. 116 §2, 2006; Ord. 111 §2; Ord. 103 §5, 2002; Ord. 85 §3, 1995; Ord. 72 §1, 1991; Ord. 64 §2; Ord. 37 §2, 1983; Ord. 15 §7, 1975; Ord. 3 §5.5, 1973)