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WASTE DISCHARGE REQUIR&nj--NTS ORDER NO. / SUTTER HOME WINERY 4 LODI FACILITY, SAN JOAQUIN COUNTY the percolate. However, this concentration is dependant upon agronomic application rates, crop uptake, and attenuation in the soil profile. If groundwater monitoring shows that this discharge results in increased salinity levels in the groundwater, then the Discharger will be required to modify the discharge such that there is no impact. 21. Presently, there is little solid waste generation at the site because grapes are not crushed at the facility. Generation of solid waste is limited to filter press (diatomaceous earth) materials and solids generated in the fermentation process. The fermentation process produces lees consisting of yeasts and solids coagulated with bentonite and settled. After filtration, these wastes are disposed of in the land application area. The filtrate is returned to the body of the blend. 22. The Discharger is required to submit a new Report of Waste Discharge prior to initiating grape crushing at the site, since grape crushing constitutes a material change in the character of wastewater discharged. GROUNDWATER CONDITIONS 23. Domestic wastes at the winery are discharged to a septic tank which discharges to a leachfield constructed in a mound. The system location is presented on Attachment B. Because a tasting room is not planned for the facility, the system serves mainly the site employees. 24. Three groundwater monitoring wells are located at the mound system. The wells were installed by requirement of the San Joaquin County Environmental Health Department(SJCEHD). Annum monitoring of the wells is required by the Monitoring and Reporting Program (MRP) of this Order. 25. The winery is served by a groundwater production well. The well is 225 feet deep and its surface seal extends to a depth of 100 feet bgs. The location of the well is presented on Attachment B. The most recent depth to groundwater measurements within this well indicated the depth to groundwater was 12 feet below ground surface (bgs). 26. Supply water is treated with an ozone injection system and multimedia filtration. Filter backwash is discharged to the stormwater retention pond. This Order requires the backwash water to be discharged into the wastewater system as described by Provision G.2.d. 27. The supply well was tested four times. The groundwater quality is presented in the table below: Date NO, as N TKN TDS P—H 7/10/01 0.2 -- -- 8.1 8/9/01 0.9 -- 230 8.1 819101 1.0 -- 230 8.0 11/2/01 0.2 0.1 -- -- NO3 as N denotes Nitrate as Nitrogen,reported in mg/L. 28. As part of the septic tank/mound distribution system installation permitting process, the Discharger prepared a nitrate loading study. Four groundwater samples were collected from open boreholes and analyzed for nitrate (as nitrate) concentrations. Analytical results were 53 mg/L, CTmject FileslSiteslgutter Home\SutterHome MR-Moc