SITE INFORMATION AND CORRESPONDENCE CASE 2

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WASTE DISCHARGE REQUIREME•S ORDER NO.R5-2003-0141 • -5- CALIFORNIA NATURAL PRODUCTS WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY 26. The 9.2 acre landscaped area is bermed around most of the area; areas that are not bermed will be closely monitored to prevent the generation of runoff. The 3.5 acre landscaped area will not be bermed but will be posted and closely monitored to prevent runoff. 27. To control tailwater, the 10.1 acre, 16.0 acre, and 29.7 acre land application areas will be bermed. Wastewater application will be by flood irrigation. Sprinkler application of wastewater in the land application areas is acceptable if the application is in compliance with Section D, "Land Application Area Specifications" and if the land application area has been adequately prepared to receive sprinkler applied wastewater. The Discharger will grow sudan grass in the summer and a choice of barley, oats, or wheat in the winter. Other crops may be acceptable as long as the discharge complies with the Effluent Limitations. 28. Wastewater will be sprinkler or drip applied to the 3.5 acre and 9.2 acre landscaped areas. Flood irrigation of wastewater in the landscaped areas is not an acceptable application technique. The Discharger states that a full-time groundskeeper will be responsible for making wastewater applications and ensuring that no runoff occurs. 29. The January 2003 RWD presented a water balance which showed adequate land areas with capacity to accept monthly average wastewater flow of 370,000 gpd of wastewater and rainfall (using the 100-year return annual precipitation total). Because adequate land application areas are available, a wastewater storage pond is not required. The Discharger is allowed to discharge wastewater to the land application areas (not the landscaped areas) during rain events provided all requirements of the WDRs are complied with. 30. The Regional Board received odor complaints in October 1987, July 1997, July 1998,March 2000, and July 2000. The odor complaints concerned the Discharger's 17.6 acre land application area. The Discharger has since made improvements to its treatment and disposal system, and odor complaints have not been received for the last two years. 31. Based on the anticipated wastewater quality and volume discharged from the treatment facility when operated properly, discharge of the wastewater should comply with the BOD effluent limitations presented in Section C. Compliance with the effluent limits, combined with careful management of the wastewater application areas, should control objectionable odors. 32. Wastewater application in the land application areas and landscaped areas will be rotated to provide soil drying time and to prevent odors. If odors are detected, the irrigated areas will be allowed to dry out thoroughly. Regular discing activities will be performed between crop activities. 33. Soil borings drilled in the 17.6 acre and 16.0 acre land application areas described soil as silt, sand, and clay mixtures. According to the San Joaquin County Soil Survey, the soils underlying the land application site consist of a loamy coarse sand and a fine sandy loam, with rapid and moderately rapid permeabilities,respectively. The sandy loam soils contain a weakly cemented to a strongly cemented hardpan layer at a depth of four to six feet. Several years ago,the Discharger deep ripped through this hardpan layer to improve percolation.