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22 December 2020 AdvancedGeo <br /> Project No. 20-6228 An Employee Owned Company <br /> Page 9 of 15 <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 1.66 minutes per inch was calculated from data collected during the <br /> one-hour percolation test; the smallest reading over the one-hour period was used to <br /> calculate the percolation rate. The use of the existing and proposed septic systems should <br /> follow the 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 compositions 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 two soil types for the <br /> property. The northern portion of the site is predominantly composed of Honcut sandy <br /> loam having 0 to 2 percent slopes (#175). The Honcut sandy loam is composed of <br /> alluvium derived from granitic rock sources. Soils are described as well drained; with high <br /> permeability; and salinity of less than 2.0 millimhos per centimeter (mmhos/cm). The <br /> Honcut sandy loam typically have the same chemical properties between surface grade <br /> and 60 inches bsg. <br /> The southern portion of the site is predominantly composed of Veritas fine sandy loam <br /> having 0 to 2 percent slopes (#266). The Veritas fine sandy loam land complex is <br /> composed of alluvium derived from mixed rock sources. Soils are described as <br /> moderately well drained; with a very low permeability; and salinity of less than <br /> 4.0 mmhos/cm. Sands in the Veritas fine sandy loam complex typically have the same <br /> chemical properties between surface grade and 54 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 to permeable and have moderate water storage. These soils will allow <br /> moderate infiltration of water through the surface soils. The longer the effluent remains <br />