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WASTE DISCHARGE REQNTS ORDER NO. R5-2004-0028 -42- CITY OF MANTECA, CITY OF LATHROP AND DUTRA FARMS WASTEWATER QUALITY CONTROL FACILITY SAN JOAQUIN COUNTY 3. Oils, greases, waxes, floating material (liquids, solids, foams, and scums) or suspended material to create a nuisance or adversely affect beneficial uses. 4. Esthetically undesirable discoloration. 5. Fungi, slimes, or other objectionable growths. 6. The turbidity to increase as follows: a. More than 1 Nephelometric Turbidity Units (NTUs)where natural turbidity is between 0 and 5 NTUs. b. More than 20 percent where natural turbidity is between 5 and 50 NTUs. C. More than 10 NTUs where natural turbidity is between 50 and 100 NTUs. d. More than 10 percent where natural turbidity is greater than 100 NTUs. 7. The ambient pH to fall below 6.5, exceed 8.5, or the 30-day average ambient pH change.by more than 0.5 units. 8. The creation of a zone, defined by water temperatures of more than 1°F above natural receiving water temperature, which exceeds 25 percent of the cross-sectional area of the river channel at any point. 9. A surface temperature rise greater than 4°F above the natural temperature of the receiving water at any time or place. 10. Deposition of material that causes nuisance or adversely affects beneficial uses. 11. Radionuclides to be present in concentrations that exceed maximum contaminant levels specified in Title 22, California Code of Regulations; that harm human, plant, animal or aquatic life; or that result in the accumulation of radionuclides in the food web to an extent that presents a hazard to human,plarit, animal, or aquatic life. 12. Aquatic communities and populations, including vertebrate, invertebrate, and plant species, to be degraded. 13. Toxic pollutants to be present in the water column, sediments, or biota in concentrations that adversely affect beneficial uses; that produce detrimental response in human,plant, animal, or aquatic life; or that bioaccumulate in aquatic resources at levels which are harmful to human health.