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INFORMATION SHEET - 2 - GOLDSTONE LAND COMPANY,LLC AND KURT KAUTZ BEAR CREEK WINERY SAN JOAQUIN COUNTY Land Treatment Units Presently 69-acres of LTUs are available for wastewater application. The Discharger has an additional 116 acres of LTU available for use but must first construct improvements, submit a technical report, and obtain approval from Regional Board staff prior to discharging to the additional LTUs. Of the 69-acres of LTUs, 12-acres consists of a rapid infiltration basin that will be converted to a slow rate land treatment unit; the remaining 57-acres consists of grape vineyards. Wastewater is applied to the existing 12-acre land treatment unit by flood irrigation. The land treatment unit is disked before the start of the crush season (typically late spring to early summer), and one-foot check berms are constructed. The Discharger proposes to convert the existing rapid infiltration system to a slow rate land application system whereby process wastewater will be applied to cropped areas at agronomic rates for water and nutrient uptake. The Discharger must carefully manage the LTUs to ensure adequate disposal capacity is available during the wet season and that loading rates don't exceed the effluent limitations. For the existing system, the 12-acre LTU will be planted with a winter grain crop and will receive wastewater only from November through May. An additional 57-acres of existing vineyards will be irrigated with process wastewater during March through October. When the 12-acre LTU is developed during the winery expansion, or if needed to meet loading requirements the proposed LTUs will be developed. The Discharger's RWD did not include a flow limit for wastewater discharged to the LTUs; therefore, staff developed a flow limit based on the activeland treatment unit acreages, infiltration rates for identified soil types, and a safety factor of 0.07 of the maximum infiltration rate. The Discharger's LTU Operation and Maintenance Plan must address the flow rate, loading rates, and describe procedures to distribute the wastewater on the LTUs that allows application during wet months and does not overload the LTUs with hydraulic, organic, or nutrient compounds. Groundwater Quality Based on three groundwater monitoring events in June 2001, September 2001, and April 2002 (the fourth quarter monitoring event was not performed by the Discharger) the shallow water table exists approximately 80 feet below the ground surface and groundwater flows toward the south. Monitoring data collected to date indicate groundwater quality is degraded but the source of the degradation is unkn wn at this time. Additional groundwater monitoring wells and monitoring data are needed to make that determination. If groundwater is determined to be degraded as a result of the wastewater discharge, the Discharger may be required to modify the discharge, improve treatment of wastewater prior to discharge, or treat the wastewater as designated waste and handle the wastewater in accordance with the requirements of California Code of Regulations Title 27. The winery is served by two production wells. The primary well is 135-feet deep; the backup well is 342- feet deep. The shallow well produces groundwater of lower quality (higher concentrations of dissolved solids)than the backup well. Effluent Limitations Effluent limitations for conservative solutes have been established based on water quality goals, State Water Resources Control Board Resolution 68-16 (the Nondegradation Policy), and background groundwater quality established by on-site groundwater monitoring wells. Groundwater quality was established by averaging the data from all five of the sample events. The average concentration of total VISm 3o m_NonlRSufPObrjca Fiks\Brar C�\b in(o.d