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WASTE DISCHARGE REQUIREMENTS -4- CARPENTER COMPANY TRUCK WASH WATER DISPOSAL SITE LATHROP, SAN JOAQUIN COUNTY 5. Public contact with wastewater shall be precluded through such means as fences, signs, and other acceptable alternatives. 6. Pond shall have sufficient capacity to accommodate allowable wash water flow and design seasonal precipitation and ancillary inflow and infiltration during the nonirrigation season. Freeboard shall never be less than two feet measured vertically to the lowest point of overflow. 7. On or about 1 October of each year, available pond storage capacity shall at least equal the volume necessary to comply with Discharge Specification 6. C. Sludge Disposal: 1. Collected screenings, sludges, and other solids removed from liquid wastes shall be disposed of in a manner that is consistent with Chapter 15, Division 3, Title 23, CCR, and approved by the Executive Officer. D. Ground Water Limitations: The discharge shall not cause underlying ground water to: 1. Be degraded. 2. Contain chemicals, heavy metals, or trace elements in concentrations that adversely affect beneficial uses or exceed maximum contaminant levels specified in 22 CCR, Division 4, Chapter 15, 3. Exceed a most probable number of total coliform organisms of 2.2/100 ml over any seven- day period. 4. Exceed concentrations of radionuclides specified in 22 CCR, Division 4, Chapter 15. 5. Contain taste or odor-producing substances in concentrations that cause nuisance or adversely affect beneficial uses. 6. Contain concentrations of chemical constituents in amounts that adversely affect agricultural use. E. Provisions: 1. The Discharger shall comply with the Monitoring and Reporting Program No. 96-117, which is part of this Order, and any revisions thereto as ordered by the Executive Officer.