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F <br /> March 3, 2005 <br /> NOA Project Number: E04155A <br /> 1 <br /> Table 5. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> R Date Tested Test Depth(ft) es ) Duration (see notes) <br /> P-1 shallow,11-29-04 3,31 10.0 4-hr Satisfactory percolation rate <br /> E (Parcel 1) <br /> k P-1 deep,11-29-04 <br /> arcel 1 22.12 Failed 4-hr. No percolation rate,fail <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 /> J6.7 Discussion of Percolation Test Results <br /> i G 7 The soils within the sewage disposal areas of the site has demonstrated a satisfactory percolation rate <br /> i in accordance with the requirements of the EHD. The soils appear to be suitable for a standard <br /> l —ti septic system. <br /> F6.8 Discussion of Septic System Sizing <br /> �J <br /> Septic System Construction should follow the San Joaquin County On-Site Vastewater Disposal <br /> Standards where applicable. Refer to the attached Nitrate Loading Study for a complete discussion <br /> of recommendations for the project. <br /> t <br /> 4 ' <br /> f //7.0 CONCLUSIONS <br /> 70 <br /> In summary, satisfactory percolation rates of the soil were achieved in the proposed septic disposal <br /> j7.� areas of the parcel. The Parcel appears to be suitable for a standard septic system. <br /> I <br /> 3 in the borings drilled on the property at about 3 feet.The <br /> Shallow ground water was encountered <br /> depth to ground water was found to be approximately 130-150 feet below the ground surface for the <br /> period of Fall 1998 and Spring 1999. The on-site water well was tested for nitrate and DBCP. <br /> —^- <br /> DBCP was detected'inithe water.sample a- 984 µg/L, above the EPA MCL of 0.2 µg/L, and nitrate <br /> _.� concentration in ound water was,fo`u�nd o 254 m /LNO "wliich'is well below th amen mum <br /> contaminant drinking water limit of 45 mg/L-NO3. <br /> Also, please see the conclusion section of the nitrate loading study.` �� <br /> 1 { 7.1 Signatures <br /> The signatures of the environmental professionals involved in the preparation of this report can be <br /> found at the front of this package. <br /> F 9 <br /> I+ <br /> '00,04E <br /> 1 i <br /> Y 1 <br /> i1, <br />