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Soil Suitability&Nitrate Loading Evaluation CTE Job#25-1256G <br /> New Septic Leech Lines <br /> 9490 E Schmeidt Rd <br /> Lodi, California <br /> June 29, 2022 Page 5 of 10 <br /> Area Soils having a moderate infiltration rate when thoroughly wet and soils having a high <br /> infiltration rate when thoroughly wet respectively. <br /> The percolation test hole (P-1) encountered soil profiles consisting of silty sands with clay (SM) to <br /> the maximum explored depth of 36 inches below existing ground surface (begs). Soils <br /> encountered in the borings are considered consistent with published mapping described above. <br /> The soil material type presented on the percolation test data sheets represents the soil material type <br /> present at the depth in which the percolation testing was conducted. Percolation data sheets are <br /> contained in Appendix-A. All test holes were backfilled and surface restored to original condition <br /> upon completion of testing. <br /> 8.0 PERCOLATION TESTING <br /> Our subsurface investigation included conducting leach field soil suitability evaluations via <br /> percolation testing. The evaluation included the drilling and testing of one percolation test hole <br /> performed at a depth of 36-inches at the proposed leach field location. The field testing for the <br /> leach field was performed under San Joaquin County EHD "Onsite Wastewater Treatment System <br /> Permit" Number SR0085342. With exception of conditions described below, the percolation test <br /> was performed in general conformance with San Joaquin County Environmental Health <br /> Department procedures shown on EHD 42-01-002, Revised 4/14/2018. The final readings of the <br /> test were observed/inspected by a San Joaquin County EHD inspector. Percolation test data is <br /> presented in Appendix A and a copy of the certified field data is included in Appendix B. <br /> 8.1 Percolation Testing Procedure <br /> Upon completion of the percolation test hole drilling, sides were scored to remove any smeared <br /> soil surfaces. Loose material was removed from the hole, 2 inches of coarse sand was added then a <br /> 3-inch diameter open-ended slotted drainpipe was installed to control potential sidewall caving of <br /> the hole. Pre-saturation of the soils to be tested was accomplished by adding water to 12-inches <br /> %7CAL,INC <br />