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09 August 2022 Advance <br />Project No. 22-6942 AnEmpoyre-ownrdCompany <br />Page 9 of 16 0 N V <br />6.5. COMPLETED PERCOLATION TEST FORM <br />After completion of the test, the EHD inspector reviewed the field data and signed the <br />required EHD Percolation Test Rate form. Field measurements recorded during the test <br />are included on the Percolation Test Rate Field Sheet provided in Appendix D. <br />6.6. POTENTIAL PROBLEMS PREDICTED <br />On site soils within the shallow percolation test hole demonstrated an adequate <br />percolation rate. Additionally, the existing septic system has been operating properly. <br />6.7. PERCOLATION TEST FINDINGS <br />The shallow percolation test performed provided a satisfactory percolation test rate. The <br />percolation rate of 1.06 minutes per inch was calculated from data collected during the <br />percolation test; the final reading over the half-hour period was used to calculate the <br />percolation rate. The use of the existing and proposed septic systems should follow the <br />San Joaquin County On-site Wastewater Treatment 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 Manteca fine sandy loam having 0 to 2 percent slopes <br />(#196). The Manteca fine sandy loam is composed of alluvium derived from mixed rock <br />sources. Soils are described as moderately well drained, with medium runoff, and salinity <br />ranging from 0.0 to 2.0 millimhos per centimeter (mmhos/cm). The Manteca fine sandy <br />loam typically features fine sandy loam from 0 to 24 inches bsg; indurated sandy loam <br />from 24 to 35 inches bsg; cemented sandy loam from 35 to 54 inches bsg; and stratified <br />loamy sand to loam from 54 to 74 inches bsg. <br />7.2. MASS TRANSPORT PROPERTIES OF UNDERLYING SITE SOILS <br />The percolation test and dominant soil type at the site indicates that the soils are semi- <br />permeable and have moderate water storage. These soils will allow moderate infiltration <br />