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4 Annual Domestic Wastewater System—oundwater Monitoring Report,May 2008 Sutter Home Winery,Lodi,California Page 3 Table 2.Laboratory Analytical Methods,Detection Limits,and MCLS Constituent Analytical Method Detection Limits Primary MCL Secondary MCL Specific Conductivity 120.1 1.0µmhos/cm 900µmhos/cm 1,600µmhos/cm H SM4500-H+B Std.units Nitrate as Nitrogen 300.0 0.25 mg/L* 10 mg/L Total Dissolved Solids SM2540C 10 mg/L 500 mg/L 1,000 mg/L Total Kjeldahl Nitrogen 351.3 1.0 mg/L Sulfate 300.0 1.0 mg/L* 250 mg/L 500 mg/L Fixed Dissolved Solids SM254OG 10 mg/L Notes: umhos/cm=micromhos per centimeter mg/L=milligrams per liter=parts per million(ppm) MCL=California Department of Health Services Maximum Contaminant Level *Reporting limits vary from 0.25 mg/L to 10 mg/L;see attached lab reports for individual reporting limits. Table 3. Groundwater Laboratory Analytical Results and Field Parameters (May 19,2008) Field Measurements Quarterly Laboratory Analyses Well ID Temp EC pH Nitrate-N TDS TKN EC pH Sulfate FDS MCL 900* 10 500 900* 250* deg C umhos/cm std units mg/L mg/L rngiL umhos/cm std units mg/L mg/L DWS-1 17.62 991 7.40 6.35 626 ND 1000 7.5 78.4 473 DWS-2 I7.68 785 7.42 3.72 521 ND 829 7.5 74.1 401 DWS-3 I 18.96 12-10 _L7.16 17.4 758 ND 1220 7.2 68.0 522 i deg C—degrees Centigrade Temp=temperature TDS=total dissolved solids umhos/cm=micromhos per centimeter EC—specific conductivity TKN=total Kjeldahl nitrogen mg/L=milligrams per liter—parts per million(ppm) Nitrate-N=Total Nitrate as N FDS=fixed dissolved solids MCL=California Department of Health Services Maximum Contaminant Level Primary MCL ND=Not detected *Recommended Secondary MCL with upper levels of 500 mg/L(sulfate),1,600µmhos/cm(EC);and 1,000 mgll.(TDS) SUMMARY 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 19, 2008, are generally consistent with the historic laboratory results (attached). Nitrate-N was detected above the DHS Primary 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 micromhos per centimeter (µmhos/cm) but below the upper level of 1,600 µmhos/cm in the groundwater samples collected from DWS-1 and DWS-3. Total dissolved solids were detected at concentrations above the DHS Secondary MCL of 500 mg/L, but below the upper level of 1,000 mg/L, in all three groundwater samples. Total Kjeldahl nitrogen was not detected in any of the groundwater samples. The groundwater gradient on May 19, 2008, was generally to the west, consistent with historic data (see Figure 3). The next annual sampling event is scheduled for May 2009. 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 C4) CONDOR