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P <br /> _ January 3,2066 <br /> NOA Project Number: E05164A <br /> summarized in the table below. <br /> i <br /> i <br />} SummarV of Percolation Tests. <br /> r <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> _ P-1 shallow,12-14-05 <br /> 3.11 3.33 1-hr Satisfactory percolation rate <br /> (Parcel 1) <br /> rp- (P <br /> 2 shallow,12-14-05 <br /> 3.3 19.23 4-hr. Satisfactory percolation rate <br /> arcel 2 <br /> Note: A satisfactory percolation rate for a"shallow'test is less than or equal to 60 minutes per inch. <br /> 4= <br /> 6.7 Discussion of Percolation Test Results <br /> I <br /> The soils within the sewage disposal areas of the proposed Parcels 1 and 2 have demonstrated a <br /> satisfactory percolation rate in accordance with the requirements of the EHD. The soils of these <br /> parcels appear to be suitable for a septic system utilizing shallow leach lines or a filter bed. <br />�I <br /> 6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site IWasteivater Disposal <br /> Standards where applicable. Please see methods of mitigation section in the Nitrate Loading Study <br /> r- attached to this report for septic system layout. <br /> I <br /> 7.0 CONCLUSIONS <br /> In summary, satisfactory percolation rates of the soil were achieved in the proposed septic disposal <br /> areas of the parcels. The proposed Parcels 1 and 2 appear suitable for a standard septic system. <br /> No ground water was encountered in any of the borings drilled on the property. The depth to <br /> ground water was found to be approximately 15 to 30 feet below the ground surface for the period <br /> of Fall 1998 and Spring 1999. The on-site water wells were tested for nitrate and DBCP. DBCP <br /> was non-detectable in the well, and the nitrate concentration in ground water was found to be 55.0 <br /> mg/L-NO3 which exceeds the maximum contaminant drinking water limit of 45 mg/L-NO3. We <br /> recommend not drinking the well water until the well is repaired or replaced and water quality is <br /> `! within drinking water standards. You should contact the EHD for more details regarding health <br /> issues and repair/replacement options. <br /> J <br /> Fi <br /> 0 <br /> 9 <br /> 0 <br />