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L <br /> L April 9,2007 <br /> NOA Project Number: E07045A <br /> L4.6 Percolation Test Forms and Results <br /> The completed percolation test forms are included in the appendix of this report. <br /> LA shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth;a <br /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A <br /> deep percolation test is defined as being between 3.5 and 25 feet in depth;a satisfactory percolation <br /> Lrate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory <br /> percolation rate within the proposed septic system disposal field of each parcel to utilize a standard <br /> f septic system. Details of the percolation tests are summarized in Table 4. <br /> r <br /> Table 4. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test th(ft) (minutes/inch) Duration (see notes) <br /> Shallow 3.3 L-3 <br /> ? 4-hr Satisfactory Percolation Rate <br /> Note: A satisfactory percolation rate for a"shallow'test is les—silim 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 /> L <br /> �6.7 Discussion of Percolation Test Results <br /> The soils within the proposed sewage disposal area have demonstrated a satisfactory percolation rate <br /> /in accordance with the requirements of the EHD for the use of a standard septic system. <br /> L ✓ 6.8 Discussion of Septic System Sizing <br /> L Septic System Construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable or other engineering recommendations. <br /> L ,I.0 CONCLUSIONS <br /> In summary, a satisfactory percolation rate of the soil was achieved in the proposed septic disposal <br /> ho area on the subject property. <br /> 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. The results of this analysis are forthcoming. <br /> L7.1 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 /> L 8 -44 <br /> L <br />