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Annual Domestic Wastewater System._,undwater Monitoring Report,May 2007 Sutter Home Winery,Lodi,California Page 3 Table 2--Groundwater Laboratory Analytical Results and Field Parameters (May 7, 2007) Laboratory Field Nitrate as N TKN TDS EC Temp pH EC Analytical Method: 300.0 351.3 SM 2540 C 120.1 Reporting Limit: 0.25 mg/L 1.010 mg/L 1.0 µmhos/cm °C S.U. µS MCL: 10 m L 500 mg/L* 1 900 mhos/cm** Monitoring Sample Well Date DWS-1 05/07/07 6.04 <1.0 736 1180 16.10 7.60 1068 DWS-2 05/07/07 4.02 <1.0 706 1140 16.61 7.64 1016 DWS-3 05/07/07 19.1 <1.0 671 1430 17.82 7.33 1299 Unit Conversions Analytical mg/L:milligrams per liter,parts per million(ppm) TKN:Total Kjeldahl Nitrogen P{ pmhos/cm: micromhos per centimeter TDS:Total Dissolved Solids 1 }rS:micro Siemens EC:electrical(specific)conductivity , Temp=Temperature MCL:California DHS Secondary Maximum Contaminant Level S.U.:Standard Units *Recommended MCL of 500 mg/L for TDS;upper MCL of 1,000 mg/L **Recommended MCL of 900µmhos/cm for EC;upper MCL of 1,600 pmhoslcm SUMMARY t The MRP requires the three groundwater monitoring wells associated with the domestic wastewater leachfield to be sampled on an annual basis. The laboratory analytical results of the groundwater samples collected from monitoring wells DWS-1, DWS-2, and DWS-3 on May 7, 2007, are generally consistent with the historic laboratory results (attached). Nitrate-N was detected above the California Department of Health Services (DHS) Primary Maximum Contaminant Level (MCL) of 10 milligrams per liter (mg/L) F1in the groundwater sample collected from DWS-3. Laboratory EC values were above the recommended DHS Secondary MCL of 900 micromhos per centimeter (µmhos/cm) but below the upper level of 1,600 µmhos/cm in all three groundwater samples. Total dissolved solids were detected at concentrations above the DHS Secondary MCL of 500 mg/L in the all of the groundwater samples, but below the upper level of F 1 1,000 mg/L. Total Kjeldahl. Nitrogen was not detected in any of the groundwater samples. The groundwater gradient on May 7, 2007, was generally to the west, consistent with historic data (see Figure 3).The next annual sampling event is scheduled for May 2008. f j LIMITATIONS AND SIGNATURE Condor developed the interpretations and conclusions presented herein in accordance with generally accepted principles and practice. Conclusions presented in this report are professional opinions based on limited information obtained at the time of our Site visits. Condor has endeavored to determine as much as practical about the Site using conventional practices given our scope of services. Condor makes no representation as to the subsurface conditions at locations or times other than those sampled by our employees and reported in this document. If any changes are made or errors found in the information utilized in this report, the interpretations and conclusions contained herein shall not be considered valid F! unless the changes are reviewed by Condor and either appropriately modified or re-approved in writing. Condor's involvement in the work performed at this Site has been limited to collecting and recording F1 depth-to-water measurements and field parameters; collecting and shipping groundwater samples; compiling data provided by analytical laboratories; and interpreting field data. Condor is not responsible for the accuracy and completeness of information collected and developed by others. �'4Ma - CONDOR