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L <br /> November 30,2005 <br /> NOA Project Number: E05116B <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> P-5 deep <br /> 10-31-05 22.75 No movement 4 hours Dail <br /> Parcel 5 / <br /> Parcel 6 shallow I/ <br /> 10-25-05 3.02 125 4 hours Fail <br /> Parcel 6 <br /> Parcel 6 shallow 23.62 250 v 4 hours Fail <br /> 10-31-05 <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 /> r <br /> ✓6.7 Discussion of Percolation Test Results <br /> L7 The soils within the sewage disposal areas of the subject property parcels 1,2 and 4 have <br /> demonstrated a satisfactory percolation rate in accordance with the requirements of the EHD for <br /> the use of a standard septic system. The soils within the sewage disposal areas of parcels 3, 5 and 6 <br /> have not demonstrated a satisfactory percolation rate in accordance with the requirements of the <br /> EHD for the use of a standard septic system.These proposed parcel appears suitable for an <br /> Lengineered septic system. <br /> 6.8 Discussion of Septic System Sizing <br /> LSeptic system construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable. <br /> i <br /> ✓7.0 CONCLUSIONS <br /> LIn summary,a satisfactory percolation rate of the soil was achieved in the proposed septic disposal <br /> area on proposed Parcels 1,2 and 4. These proposed parcels appear suitable for standard septic <br /> Nsystems. The proposed septic areas for proposed parcels 3, 5 and 6 appear suitable for an engineered <br /> septic system since the percolation rates failed to meet EHD minimum standards. We recommend a <br /> Civil Engineer prepare a septic system design for the proposed parcel unless additional percolation <br /> L testing,performed under EHD oversight, achieves a satisfactory rate. Our office has been <br /> contracted by the client to prepare engineered septic system drawings for the property, they will <br /> follow this report shortly. <br /> L /,No ground water was encountered in any of the borings drilled on the property.The on-site water <br /> well was tested for nitrate and DBCP. DBCP was non-detectable,and nitrate concentration in <br /> Lground water was found to be 21.7 mg/L-NO3,which is below the maximum contaminant drinking <br /> 10 <br /> L <br /> L <br />