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�.. 1.0, <br /> WASTE DISCHARGE REQUIREMENTS -13- <br /> CITY OF STOCKTON <br /> REGIONAL WATER QUALITY CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> 2. Oils, greases, waxes, floating material (liquids, solids, foams, and scums) or suspended <br /> material to create a nuisance or adversely affect beneficial uses. <br /> 3. Aesthetically undesirable discoloration. <br /> 4. Fungi, slimes, or other objectionable growths. <br /> 5. Turbidity to increase more than 20 percent over background levels. <br /> 6. The normal ambient pH to fall below 6.5, exceed 8.5, or change by more than 0.5 units. <br /> 7. Deposition of material that causes nuisance or adversely affects beneficial uses. <br /> 8. The creation of a zone, defined by water temperatures of more than 1°F above natural <br /> receiving water temperature, which exceeds 25 percent of the cross-sectional area of the <br /> river channel at any point. <br /> 9. A surface water temperature rise greater than 4°F above the natural temperature of the <br /> receiving water at any time or place. <br /> 10. Radionuclides to be present in concentrations that exceed maximum contaminant levels <br /> specified in the California Code of Regulations, Title 22; that harm human, plant, animal or <br /> aquatic life; or that result in the accumulation of radionuclides in the food web to an extent <br /> that presents a hazard to human, plant, animal, or aquatic life. <br /> 11. Aquatic communities and populations, including vertebrate, invertebrate, and plant species, <br /> to be degraded. <br /> 12. Toxic pollutants to be present in the water column, sediments, or biota in concentrations <br /> that adversely affect beneficial uses; that produce detrimental response in human, plant, <br /> animal, or aquatic life; or that bioaccumulate in aquatic resources at levels which are <br /> harmful to human health. <br /> 13. Violations of any applicable water quality standard for receiving waters adopted by the <br /> Board or the State Water Resources Control Board pursuant to the CWA and regulations <br /> adopted thereunder. <br /> 14. Taste or odor-producing substances to impart undesirable tastes or odors to fish flesh or <br /> other edible products of aquatic origin or to cause nuisance or adversely affect beneficial <br /> uses. <br />