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29 May 2020 AdvancedGec <br /> Project No. 20-6014 An Employee OwnedComponv <br /> Page 8 of 14 <br /> the gravel and recording the amount of water remaining in the borehole after 30-minute <br /> intervals. However, after less than 30 minutes all the water drained out of the test hole. <br /> Therefore, procedure #3 was performed by adding water to approximately six inches <br /> above the gravel and recording the amount of water remaining in the borehole at <br /> 10-minute intervals for one hour and then at 5-minute intervals for 30 minutes. The water <br /> level was measured from a fixed reference point at the surface of the boring using a <br /> Solinst water level meter. The final measurement was observed by the EHD inspector. <br /> Based on the field measurements collected, the percolation rate for the parcel was <br /> 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 hole demonstrated adequate percolation <br /> rates. <br /> 6.7. PERCOLATION TEST FINDINGS <br /> The shallow percolation test performed provided a satisfactory percolation test rate. The <br /> percolation rate of 1.19 minutes per inch was calculated from data collected during the <br /> percolation test; the smallest reading over the 1-hour period was used to calculate the <br /> percolation rate. The use of the proposed septic system should follow the San Joaquin <br /> County OV TS 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 Vignolo silt loam having 0 to 2 percent slopes (#270). The <br />