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CONCLUSIONS AND RECOMMENDATIONS <br /> In summary, the soil conditions in the percolation test locations appear to be suitable for <br /> use with on-site septic systems. Satisfactory soil percolation rates of less than 4.6 <br /> min/in (Parcel 1), less than 4.2 min/in (Parcels 2 and 3), and less than 4.4 min/in (Parcel <br /> 4) were observed in the test locations. No new construction is planned for the Site. <br /> The depth of ground water based on recent aquifer levels is estimated to range between <br /> 51 to 62 feet below ground surface. The ground-water flow is to the north-northeast at a <br /> rate of 8 to 10 feet per mile. <br /> A water sample was collected from the domestic water well. DBCP was not detected in <br /> the sample. Nitrate was detected at a concentration of 10.7 mg/L-N in the water <br /> sample, slightly above the US EPA's Maximum Contaminant Level (MCL) of 10 mg/L-N. <br /> For health reasons, we recommend that the well water not be consumed until nitrate <br /> levels can be reduced to below the MCL. Utilizing bottled water for drinking water may <br /> be a good option to consider. The San Joaquin County Environmental Health <br /> Department may be able to recommend other alternatives. <br /> We believe the Site suitable for the use of standard septic systems utilizing leach lines <br /> and seepage pits. <br /> LOGE 1513 Page 9 <br />