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WASTE DISCHARGE REQUIREN- n TS ORDER NO. R5-2004-0079 5 SPENKER RANCH,INC. JESSIE'S GROVE WINERY SAN JOAQUIN COUNTY SITE SPECIFIC CONDITIONS 24. The site topography is relatively flat. Surficial soils consist of Tokay fine sandy loam. The soil possesses moderately rapid permeability(2 to 6 inches per hour) based on the Soil Survey of San Joaquin County. 25. The facility is within the Lower Mokelumne Hydrologic Area(No. 531.20), as depicted on interagency hydrologic maps prepared by the Department of Water Resources in August 1986. 26. Average annual rainfall for the Lodi area is 17.43 in/year; the 100-year return annual total rainfall is 31.16 in/year; the evapotranspiration rate for the Lodi area is 52.09 in/year. 27. The site is located outside the 100-year flood zone. 28. Domestic wastewater is collected separately from the process winery wastewater in an on-site sewage disposal system. This system is regulated by San Joaquin County Environmental Health Department. BASIN PLAN, BENEFICIAL USES, AND REGULATORY CONSIDERATIONS 29. The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, Fourth Edition, (hereafter Basin Plan) designates beneficial uses, establishes water quality objectives, contains implementation plans and policies for protecting waters of the basin, and incorporates by reference plans and policies adopted by the State Water Resources Control Board. Pursuant to §13263(a) of the California Water Code (CWC), waste discharge requirements must implement the Basin Plan. 30. Surface water drainage in the arexis to Sycamore Slough, tributary to the Mokelumne River downstream of Camanche Reservoir. 31. The beneficial uses of the Mokelumne River from Camanche Reservoir to the Delta are agricultural supply; water contact recreation; noncontact water recreation; warm freshwater habitat, cold freshwater habitat; migration of aquatic organisms; spawning, reproduction, and/or early development; and wildlife habitat. 32. The beneficial uses of underlying groundwater are municipal and domestic water supply, agricultural supply, industrial service supply, and industrial process supply. 33. State Water Resources Control Board (State Board) Resolution No. 68-16 (the Antidegradation Policy)requires that the Board, in regulating the discharge of waste, must maintain the high quality of waters of the state until it is demonstrated that any change in quality will be consistent with maximum benefit to the people of the State, will not unreasonably affect beneficial uses, and will not result in water quality less than that described in the Regional Board's policies (e.g., quality that exceeds water quality objectives). Resolution No. 68-16 also requires that waste discharged to high quality waters be required to meet waste discharge requirements that will result in the best practicable treatment or control of the discharge.