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Soil Suitability&Nitrate Loading Evaluation CTE Job#25-1084G <br /> New Septic Leech Lines <br /> 21850 East Liberty Rd <br /> Clements, California <br /> January 30, 2021 (Revised 1/17/2022) Page 3 of 9 <br /> The following San Joaquin County permit records were available for other surrounding properties <br /> along East Liberty Road; <br /> • At 22077 East Liberty Road (APN: 021-200-04), a permit was obtained in 2003 for a new <br /> well. <br /> 5.0 FIELD INVESTIGATION <br /> A preliminary field investigation, conducted on January 5, 2020, included site reconnaissance, <br /> mapping of surficial site deposits, and the excavation of two percolation test holes for septic leach <br /> lines and one percolation test hole for a proposed storm retention basin (designated "P-1", "P-2", <br /> and "P-3" respectively) to a maximum depth of 36 inches. Percolation test holes logs, percolation <br /> data, and test results are attached as Appendix-A. The percolation test location is shown on the <br /> "Exploration Map", attached as Figure-2. <br /> The test holes for this study were drilled using a 4-inch diameter solid stem auger. The maximum <br /> explored depth was 3.0± feet below existing ground surface (begs). Soils were logged in the field <br /> by a CTE Field Geologist and were classified according to the Unified Soil Classification System <br /> (ASTM D2487) based on field testing, and visual observations. <br /> 6.0 GROUNDWATER <br /> No free groundwater was encountered within the percolation test hole performed for our <br /> evaluation. Based on information contained on the California SGMA Data Viewer site <br /> (https:Hsgma.water.ca. ovg /web ig s/?gppid=SGMADataViewer# wlevels), ground water flows <br /> toward the Northeast and historic high groundwater level is shown to be 121 feet begs (Spring <br /> 2020). The 121-foot groundwater level is consistent with historic high (1983 and 1999) <br /> groundwater levels shown in the "San Joaquin County Environmental Health Department Onsite <br /> Wastewater Treatment Systems Local Agency Management Program"publication. <br /> %7CM-AALI .INC <br />