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30 July 2019 AdvancedGeo <br /> AGE Project No. 19-4772 E n v i ro n rYi e n t a l <br /> Page 8 of 14 <br /> inspector. Based on the field measurements collected, the percolation rate for the parcel <br /> was calculated; the Percolation Test Rate Field Sheet is provided in Appendix C. <br /> 6.5. COMPLETED PERCOLATION TEST FORM <br /> After completion of the successful test, the EHD inspector reviewed the field data and <br /> signed the required EHD Percolation Test Rate form. Field measurements recorded <br /> during the test are included on the Percolation Test Rate Field Sheet provided in <br /> Appendix C. <br /> 6.6. POTENTIAL PROBLEMS PREDICTED <br /> On site soils within the shallow percolation test range (P-2) demonstrated adequate <br /> percolation rates. Additionally, the existing septic system has been properly operating. <br /> No percolation was observed from test hole P-1. However, AGE does not believe this is <br /> indicative of site soils but rather a problem with the test hole. Based on the successful <br /> percolation test at P-2 and the existing septic system on-site that has been operating <br /> properly, the failed test at P-1 is likely an anomaly. <br /> 6.7. PERCOLATION TEST FINDINGS <br /> The shallow percolation test performed provided a satisfactory percolation test rate. The <br /> percolation rate of 27.78 minutes per inch was calculated from data collected during the <br /> 4-hour percolation test; the smallest reading over the 4-hour period was used to calculate <br /> the percolation rate. The use of the existing and proposed septic systems should follow <br /> the San Joaquin County On-site Wastewater Disposal Standards. <br /> 7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL <br /> Soil chemical properties were supplied by regionally sourced material for the surrounding <br /> area. <br /> 7.1. CHEMICAL AND PHYSICAL PROPERTIES OF SITE SOILS <br /> The dominant soil composition in the general area of the property was inferred from <br /> information provided by the United States Department of Agriculture's Soil Geographic <br /> Database (USDASGD). The USDASGD soil survey indicates the soil type for the property <br /> is predominantly composed of Capay Clay having 0 to 1 percent slopes (#118). The <br /> Capay Clay land complex is composed of clayey alluvium derived from sedimentary rock <br /> and is dominated by clay. Soils are described as moderately well drained; with a general <br />