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01 October 2019 <br />AGE Project No. 19-4850 <br />Page 8 of 14 <br />at the surface of the boring using a Solinst water level meter. Measurements were <br />recorded at 30-minute intervals for four hours. The final two measurements were <br />observed by the EHD inspector. Based on the field measurements collected, the <br />percolation rate for the parcel was calculated; the Percolation Test Rate Field Sheet is <br />provided in Appendix C. <br /> <br /> <br />6.5. COMPLETED PERCOLATION TEST FORM <br /> <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 /> <br /> <br />6.6. POTENTIAL PROBLEMS PREDICTED <br /> <br />On site soils within the shallow percolation test hole demonstrated adequate percolation <br />rates. Additionally, the existing septic system has been properly operating. <br /> <br /> <br />6.7. PERCOLATION TEST FINDINGS <br /> <br />The shallow percolation test performed provided a satisfactory percolation test rate. The <br />percolation rate of 16.7 minutes per inch was calculated from data collected during the 4- <br />hour percolation test; the smallest reading over the 4-hour period was used to calculate <br />the percolation rate. The use of the existing septic system should follow the San Joaquin <br />County On-site Wastewater Disposal Standards. <br /> <br /> <br />7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL <br /> <br />Soil chemical properties were supplied by regionally sourced material for the surrounding <br />area. <br /> <br /> <br />7.1. CHEMICAL AND PHYSICAL PROPERTIES OF SITE SOILS <br /> <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 the Jacktone-Urban land complex having 0 to 2 percent <br />slopes (#181). The Jacktone-Urban land complex is composed of alluvium derived from <br />mixed rock sources and is dominated by clay and sandy to clayey loam. Soils are <br />described as somewhat poorly drained, with a low permeability and salinity of less than