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WASTE DISCHARGE REQUIREMENTS -4- SEBASTIANI VINEYARDS, INC. SAN JOAQUIN COUNTY Upon treatment in the AIPS and constructed wetlands, BOD concentrations will be reduced to approximately 10 mg/1 during average flows and to 15 mg/l during peak flows. The total suspended solids is estimated to be 12 mg/1 during average and peak flows. Compound concentrations are estimated to be reduced by an average annual rate of about 97 percent. 19. The total annual precipitation at the facilities is approximately 17.6 inches per year as measured at the City of Lodi, during the period from 1962 to 1996. The annual pan evaporation rate is 60 inches and the evapotranspiration rate is typically within five percent of straight pan evaporation rate. 20. The TRV East facility had a 550- gallon, gasoline underground storage tank (UST)which was removed in November 1988. The UST site was investigated and remediated, and closure has been recommended by San Joaquin County (Local Oversight Program). Monitoring wells, installed as part of the investigation, indicate depth to groundwater has varied historically between approximately 5 to 20 feet bgs, with a westerly to northwesterly flow direction. 21. Land use in the area of the TRV East and TRV West facilities is for viticulture and mixed farming. The TRV East facility is bounded on the west by railroad tracks. 22. The TRV East and TRV West facilities are in Section 1, T3N, RSE, MDB&M, with surface water drainage to Sycamore Slough, tributary to South Fork Mokelumne River. The facilities are within Lower Mokelumne Hydrologic Area(No. 531.20), as depicted on interagency hydrologic maps prepared by the Department of Water Resources in August 1986. 23. The Board adopted a Water Quality Control Plan, Fourth Edition, for the Sacramento/San Joaquin River Basins (hereafter Basin Plan), which contains water quality objectives for all waters of the Basin. These requirements implement the Basin Plan. 24. The beneficial uses of Sycamore Slough and its tributaries are municipal,industrial, and agricultural supply; recreation; esthetic enjoyment; navigation; ground water recharge; fresh crater replenishment; hydropower generation; and preservation and enhancement of fish, w ldlife, and other aquatic resources. The beneficial uses of underlying ground water are domestic, industrial, and agricultural supply. 25. The Board has reviewed the California Environmental Quality Act(CEQA) document certified by the San Joaquin County Community Development Department and concurs there are no significant impacts on water quality.