B.1.1. The District’s “Prohibited Discharges” are contained herein. The General Manager shall have the authority to change the prohibited discharges, in order to comply with local, state, and/or federal regulation amendments.
B.1.2. Prohibited Discharges: All persons are expressly prohibited from discharging the following into the publicly owned treatment works (POTW).
a. Construction dewatering.
b. Infiltration.
c. Inflow.
d. Storm water.
e. Rainwater, groundwater, street drainage, subsurface drainage; roof drainage; yard drainage; water from ponds or lawn spray runoff, surface water, artesian well water, condensate, deionized water, unpolluted industrial wastewater, water from trash/grease disposal areas, or any other water that is to be discharged into the Clark County storm drain system.
f. Unused prescription and over-the-counter medications.
g. Any pollutant or wastewater which may cause pass through or interference or any liquids, solids, or gases which, by reason of 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 POTW. Included in this prohibition are waste streams with a closed cup flash point of less than 140 F, (60 C) using the methods specified in 40 CFR 261.21. At no time shall two successive readings on an explosion hazard meter at the point of discharge into the POTW or at any point in the system be more than five percent (5%) nor any single reading over ten percent (10%) of the lower explosive limit (LEL) of the meter. The lower explosive limit is the minimum concentration of a combustible gas or vapor in the air (usually expressed in percent by volume at sea level), which will ignite if an ignition source is present.
h. Gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, sulfides, pesticides, herbicides, solvents, or anything else which has been determined by the District, state, or Environmental Protection Agency (EPA) to be a fire or other hazard to the POTW.
i. Any solid or viscous substance in amounts which may cause obstruction to the flow anywhere in the POTW or otherwise interfere with the operation of the POTW or pass through the POTW, but in no case solids greater than one-half inch (1/2” or 1.27 centimeters) in any dimension.
j. Manure, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste stream paper, wood, plastics, gas, tar, concrete, asphalt, residues from refining or processing of fuel or lubricating oil, mud, glass grindings, or polishing waste streams.
k. Any slug load, or any discharge at a flow rate or containing a concentration or quantity of pollutants exceeding, for any time period longer than fifteen (15) minutes, more than five (5) times the average twenty-four (24) hour flow rate, concentration, or quantity discharged during normal operation.
l. Any pollutant or wastewater in sufficient quantity, by itself or by interaction with other pollutants that will constitute a hazard.
m. Any pollutant or wastewater containing releases of petroleum product, solvents, or other industrial chemicals.
n. Any pollutant or wastewater with any corrosive properties capable of causing damage or creating a hazard or any wastewater having a pH of less than five (5.0), or greater than eleven (11.0).
o. Any noxious or malodorous liquids, gases, solids, or other pollutants which, either singly or by interaction with other pollutants, when introduced into the POTW are sufficient to create a public nuisance or are sufficient to hinder entry into any part of the POTW for maintenance and repair.
p. Any substance which may cause the POTW effluent or any other residues, sludge, or scums to be unsuitable for reclamation and reuse or to interfere with the reclamation process.
q. Any wastewater which imparts unusual color to the POTW’s effluent. Color shall mean the optical density at the visual wave length of maximum absorption, relative to distilled water. One hundred percent (100%) transmittance is equivalent to zero (0.0).
r. Any wastewater having a temperature greater than 140F (60C), or any wastewater which will inhibit biological activity in the POTW, but in no case, wastewater which causes the temperature at the introduction into the POTW to exceed 104F (40C).
s. Any non-domestic wastewater containing radioactive wastes or isotopes.
t. Any non-domestic wastewater containing pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause District employee health and safety issues.
u. Any trucked or hauled pollutants, except at authorized discharge points designated by the District and in compliance with District septage and chemical toilet wastes requirements.
v. Any sludge, screenings, or other residues from the pretreatment of industrial waste streams.
w. Any medical wastes (non-domestic pollutants generated by medical procedures including, but not limited to isolation wastes, infectious agents, human blood and blood byproducts, pathological wastes, sharps, body parts, fomites, etiologic agents, contaminated bedding, surgical wastes, potentially contaminated laboratory wastes and dialysis wastes), except as specifically authorized by the Industrial Wastewater Discharge Permit.
x. Recognizable human or animal anatomy.
y. Any wastes containing enzymes, surfactants, microbes, detergents, surface active agents, or other substances which may cause the discharge to coagulate/solidify or cause excessive foaming in the POTW.
z. Pollutants which will cause corrosive structural damage to the POTW.
aa. Any pollutant, including oxygen demanding pollutants (biochemical oxygen demand [BOD], chemical oxygen demand [COD], etc.) released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW.
bb. Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through.
cc. Any substance which may cause the POTW to violate its discharge permit, or any other federal, state, or District permits or regulations, including any receiving water quality standards.
B.1.3. Wastes prohibited in Appendix B shall not be processed or stored in such a manner that would allow these materials to be discharged directly or indirectly to the POTW. Where pretreatment facilities are required, all floor drains located in process or materials storage areas shall discharge to the pretreatment facilities before connecting with the POTW. If it is determined that a floor drain is inadequately protected against accidental prohibited discharges, the District may require the drain to be permanently abandoned, as specified in the Uniform Building Code.
