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(or <br /> August 31, 2006 <br /> NOA Project Number: E06091A <br /> t <br /> Table 4. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Test Percolation Rate Test Comment <br /> Date Tested Depth(ft) (minutes/inch) Duration (see notes) <br /> haHo6 3.33 4.54 4-hr Satisfactory Perc Rate ` <br /> C �• <br />� Deep <br /> 8-10-06 8.36 4.54 4-hr Satisfactory Perc Rate <br /> Note: A satisfactory percolation rate for a"shallow'test is less than or equal to 60 minutes per inch. <br /> A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> 6.7 Discussion of Percolation Test Results <br /> The soils within the sewage disposal areas of the site have demonstrated a satisfactory percolation <br /> rate in accordance with the requirements of the EHD for the use of a standard septic system. <br /> 6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site IVastexaterDisposal �� � <br /> Standards where applicable. Please see section 4.2 in the attached Nitrate Loading Study,Part II, for <br /> F, further detail on septic system sizing. <br /> F1 7.0 CONCLUSIONS <br /> In summary, satisfactory percolation rates of the soil were achieved in the proposed septic disposal <br /> areas of the Site. The septic disposal areas of the proposed parcels appear suitable for a standard <br /> septic system. In addition to these conclusions,please see the conclusions for the attached Nitrate <br /> Loading Study, Part II. <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 between approximately 20 and 40 feet below the ground surface for <br /> F1 the period of Fall 1998 and Spring 1999 based on the San Joaquin County Ground Water Maps. <br /> The water well on site was tested for nitrate and DBCP. DBCP was not detected in the water <br /> F] sample. The nitrate concentration in ground water was found to be 161 mg/L-NO3,which is well <br /> above maximum contaminant drinking water limit of 45 mg/L-NO3. We recommended the well not <br /> F1 be used for drinking water since the water quality test indicates levels of Nitrate above the MCL for <br /> drinking water. We recommend discussing well repair options for elevated nitrate with EHD. <br /> F! 9 <br />