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WASTE DISCHARGE REQUIRE, JTS ORDER NO.R5-2003-0179 -4- VAN RUITEN-TAYLOR RANCH LTD. VAN RUITEN-TAYLOR WINERY LLC SAN JOAQUIN COUNTY 20. The application of the winery wastewater to 200 acres of land should not cause an increase in the dissolved solids concentration in the underlying groundwater. Based on the water balance, a total of approximately 720,000 gallons of wastewater will be produced each year. A conservative estimate of a concentration of 3,000 mg/L TDS in the wastewater converts to a total of 18,014 pounds of TDS produced each year in the wastewater. TDS is composed of both Volatile Dissolved Solids (VDS) and Inorganic Dissolved Solids (IDS). The proportion of VDS to IDS in wastewater varies with the source, but generally 50-percent of the TDS in winery wastewater is in the volatile form. These VDS are biologically treated by soil microorganisms in a well managed land application system, and do not enter the groundwater. Therefore, of the 18,014 pounds of TDS in the wastewater, about 9,000 pounds are expected to be in the inorganic fraction, equating to a load of 45 lbs/acre for the 200 acre vineyard. Plants can take up some dissolved solids species at a rate of 2,000 lbs/acre-year, so the proposed loading rate may not degrade the underlying groundwater. The Discharger has replaced some products (i.e. potassium hydroxide for sodium hydroxide) to maximize the uptake of the dissolved solids. Nevertheless, groundwater monitoring is appropriate to ensure that degradation does not take place, as dissolved solids also exist in the supplemental irrigation water and any fertilizer applied to the vineyard. SOLID WASTE 21. Solid/semi-solid wastes such as pomace (skins, seeds,pulp, stems, etc. resulting from the grape crush), and wine settlement and filter cake media(bentonite and diatomaceous earth) are generated by the processing operations. Such solid/semi-solid wastes are segregated from the process wastewater stream for separate handling and disposal. The pomace is spread in the vineyards as compost and/or tilled into the vineyards as a soil amendment. The amount of diatomaceous earth generated is small and is generally discharged to the treatment system and eventually discharged to the land application area with the wastewater or applied with wasted sludge. 22. Seeds, stems, skins solids, and pomace collected from crushing equipment and from floor drain screens is composted on an asphalt covered pad and applied to the land application area at agronomic rates. Applied compost is disced into the soil. SITE SPECIFIC CONDITIONS 23. The site topography relatively is flat. Surficial soils consist of Tokay fine sandy loam or Acampo sandy loam. Both soil types possess moderately rapid permeability(2 to 6 inches per hour)based on the Soil Survey of San Joaquin County. 24. A soil boring was drilled on 2 November 1999. Subsurface soils were identified as sand/clay/silt mixtures. A six foot thick low permeability zone was identified from 22 to 28 feet. 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; evapotranspiration rates for the Lodi area is 52.09 in/year.