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Soil Borings <br />On October 19 and November 18, 2021, Live Oak excavated shallow borings on each <br />proposed parcel of the Site for the purpose of conducting percolation tests. The borings <br />were four inches in diameter, 2.22 to 2.51 feet deep, and were excavated by hand <br />auger (Table 2). The locations of the borings are indicated on Plate 11. <br />The soil in the borings was similar to that described by the Soil Survey. A mixture of <br />clay, silt, and sand was encountered in each hole. The soil logs are presented on <br />Plates 12 through 15. <br />Discussion of Soil Lithology <br />Based on the soil observed in the borings, there appears to be limited potential for <br />percolation in the shallow soil zones. Sandy soils generally have a much greater <br />potential for percolation than fine-grained or cemented soils. However, a percolation <br />test is the only accepted method for determining the suitability of the soils for a septic <br />disposal area. Percolation test results are discussed in the following section. <br />rcolation Test <br />Shallow percolation tests were conducted on each proposed parcel of the Site. The soil <br />borings discussed above were used for the percolation test holes. Percolation test <br />procedures conformed to San Joaquin County Environmental Health Department policy. <br />Preparation and Presaturation of Percolation Test Holes <br />After the borings were advanced by hand auger and the soil logged, the test holes were <br />completed for the percolation testing. Approximately two inches of pea gravel were <br />placed in the bottom of each open soil boring, followed by a 2.0 -inch diameter PVC pipe <br />with perforations on the bottom. Pea gravel was then used to backfill a few inches of <br />the annular space. <br />Live Oak presaturated the percolation test holes approximately 24 hours prior to the <br />percolation testing. Each hole was filled with water to a height of 12 inches above the <br />bottom of the boring for the presaturation. On the day of testing, each hole was found <br />to be intact and dry. <br />Percolation Test Procedure <br />Live Oak conducted the percolation tests for the borings on October 20 and November <br />19, 2021. Based on the soil types present, standard four-hour tests were selected. <br />Water level measurements were taken every 30 minutes during the four-hour period. <br />The last 30 minutes of each test were observed by Francisco Garcia Ruiz, Registered <br />LOGE 2153 Page 6 <br />