SITE INFORMATION AND CORRESPONDENCE

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WASTE DISCHARGE REQUIREMENTS ORDER NO. -4- RODNEY AND GAYLA SCHATZ MOKELUMNE RIM VINEYARDS SAN JOAQUIN COUNTY of the land application area. It is also appropriate to require the Discharger to install groundwater monitoring wells, and if impacts are identified, to takes steps to prevent groundwater degradation. SOLID WASTE 16. Solid/semi-solid wastes such as pomace (skins, seeds, pulp, stems, etc. resulting from the grape crush) and filter cake media (bentonite and diatomaceous earth) are also generated by the processing operations. Such solid/semi-solid wastes are segregated from the process wastewater stream by cleanup processes (sweeping materials from floor drains) or in the rotary screen. Solids are placed in the land application area as fertilizer/soil amendment. GROUNDWATER CONDITIONS 17. No groundwater monitoring wells exist on the property. An active agricultural well does exist on the property but no information on the well depth or screen interval is available. The well location is presented on Attachment C. Water quality in the well was sampled on 2 April 2001. The water quality results were: Constituent Units Concentration Nitrate (as N) mg/L 3.9 Total Kjeldahl Nitrogen mg/L ND (5.0) Total Dissolved Solids mg/L 352 PH Std. Unit 7.2 ND denotes Not Detected,detection limit shown in parentheses. 18. Groundwater exists approximately 65 feet below the ground surface, according to the San Joaquin County Flood Control and Water Conservation District 1999 Groundwater Elevation Map, which was included in the RWD. A spring 1999 groundwater elevation map prepared by the same agency indicates that groundwater flows to the north/northeast. Groundwater flow direction may be influenced by groundwater extraction or replenishment activities in the surrounding area. SITE SPECIFIC CONDITIONS 19. 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. 20. 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. 21. 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. 22. The site is located outside the 100-year flood zone. V:\S:i_loNuin_Non I5\SuIRObrlm l'Sxi I-quiii'Mokelmmc Rini vinryudsMDRr I doc