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WASTE DISCHARGE REQUIREMENTS _ HOUSING AUTHORITY OF THE COUN'T'Y OF SAN JOAQUIN _3 HOUSING AUTHORITY THORNTON SEWER PLANT SAN JOAQUIN COUNTY B. Discharge Specifications: 1. The monthly average dry weather discharge flow shall not exceed 0.115 million gallons/day. 2. Objectionable odors originating at this facility shall not be perceivable beyond the limits of the wastewater treatment and disposal areas. 3. As a means of discerning compliance with Discharge Specification No. 2, the dissolved oxygen content in the upper zone Q foot) of wastewater in ponds shall not be less than 1.0 mg/l. 4. Ponds shall not have a pH less than 6.5 or greater than 8.5. 5. Ponds shall be managed to prevent breeding of mosquitos. In particular: a. An erosion control program should assure that small coves and irregularities are not created around the perimeter of the water surface. b. Weeds shall be minimized through control of water depth, harvesting, or herbicides. C. Dead algae, vegetation, and debris shall not accumulate on the water surface. 6. Public contact with wastewater shall be precluded through such means as fences, signs, and other acceptable alternatives. 7. Ponds shall have sufficient capacity to accommodate allowable wastewater 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. 8. On or about 1 October of each year, available pond storage capacity shall at least equal the volume necessary to comply with Discharge Specification 7. 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, of the California Code of Regulations and approved by the Executive Officer.