SR0083523_SSNL - Laserfiche WebLink

Home Browse Search

01 April 2021 AdvancedGeo Project No. 21-6365 An Employee-Owned Company Page 9 of 15 for the parcel was calculated; the Percolation Test Rate Field Sheet is provided in Appendix D. 6.5. COMPLETED PERCOLATION TEST FORM After completion of the test, the EHD inspector reviewed the field data and signed the required EHD Percolation Test Rate form. Field measurements recorded during the test are included on the Percolation Test Rate Field Sheet provided in Appendix D. 6.6. POTENTIAL PROBLEMS PREDICTED On site soils within the shallow percolation test hole demonstrated adequate percolation rates. Additionally, the existing septic system has been operating properly. 6.7. PERCOLATION TEST FINDINGS The shallow percolation test performed provided a satisfactory percolation test rate. The percolation rate of 4.38 minutes per inch (MPI) was calculated from data collected during the one-hour percolation test; the smallest reading over the one-hour period was used to calculate the percolation rate. The use of the proposed septic systems should follow the San Joaquin County OWTS Standards. 7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL Soil chemical properties were supplied by regionally sourced material for the surrounding area. 7.1. CHEMICAL AND PHYSICAL PROPERTIES OF SITE SOILS The dominant soil composition in the general area of the property was inferred from information provided by the United States Department of Agriculture's Soil Geographic Database (USDASGD). The USDASGD soil survey indicates the soil type for the property is predominantly composed of Jacktone-Urban land complex having 0 to 2 percent slopes (#181). The Jacktone-Urban land complex is composed of alluvium derived from mixed rock sources. Soils are described as somewhat poorly drained, with a very low permeability, and salinity ranging from 0.0 to 2.0 millimhos per centimeter (mmhos/cm). The Jacktone-Urban land complex typically have similar chemical properties and soil profile between surface grade and 37 inches bsg and between 37 inches and 60 inches bsg.