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r ` Annual Domestic wastewater System Groundwater Monitoring Report Sutter Home Winery,Lodi,CA June 21,2004 Page 3 Table 2—Groundwater Laboratory Analytical Results and Field Parameters (May 12, 2004) Laboratory %0 �1 Field Nitrate as N TKN TDSerature H EC Analytical Method: 300.0 351.3 160.1 Reporting Limit: 0.25 mg/L 1.0 mg/L i0 trig/L °CS.U. µS MCL: 10 m L 500 mg/L*MonitorWell Sample Date DWS-1 5/12/2004 5.7 ND 67617.8 7.39 896 DWS-2 5/12/2004 9.3 ND 8008.2 7.35 1,065 DWS-3 5112/2004 14 ND 900 , 9.7 7.14 1,274 Unit Conversions Analytical mg/L:milligrams per liter,parts per million(ppm) TKN:Total Kjeldahl Nitrogen µmhos/cm: micromhos per centimeter TDS:Total Dissolved Solids µS'micro Siemens EC:electrical(specific)conductivity MCL:California DHS Secondary Maximum Contaminant Level *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 umhoslcm ND=not detected at or above the reported laboratory detection limit SUMMARY The. MRP requires the three groundwater monitor wells associated with the domestic wastewater leachfieid to be sampled on an annual basis. The laboratory analytical results of the groundwater samples collected from monitor wells DWS-1 through DWS-3 on May 12, 2004, are generally consistent with the historical laboratory results. Nitrate-N was detected above the California Department of Health Services (DHS) Primary Maximum Contaminant Level (MCL) of 10 milligrams per liter (mg/L) in the groundwater sample collected from DWS-3. Laboratory EC values were above the recommended DHS Secondary MCL of 900 µmhos/cm, but below the upper level of 1,600 µ.mhos/em in all of the groundwater samples. TDS 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 1,000 mg/L. TKN was not detected in any of the groundwater, samples collected at the site during the current monitoring event. The }l groundwater gradient on May 12, 2004 is to the west, consistent with historical monitoring results. Refer to Appendix D for historical groundwater monitoring data. The next annual sampling event is scheduled for May 2005. i r LIMITATIONS AND SIGNATURE Condor developed the interpretations and conclusions presented herein in accordance with generally F., accepted principles.and practice. Conclusions presented in this report are professional opinions based on I 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 S 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. 4 . Fill CONDOR i 1