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On September 8, 2017, Live Oak excavated one shallow soil boring on the Site for the <br /> purpose of logging the soil. The boring was four inches in diameter, 3.5 feet deep, and <br /> was excavated by hand auger. Live Oak excavated this boring within a few feet of the <br /> previous percolation test. The soil in the boring was similar to, though sandier than, that <br /> described by the Soil Survey. Sandy silt was encountered to six inches below ground <br /> surface, followed by silty fine sand to the full depth of the boring. The log for the soil <br /> boring is presented in Plate 10. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be good potential for <br /> percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> test results are discussed in the following section. <br /> Percolation Test <br /> One shallow percolation test was conducted on the Site. The test was performed by <br /> Justin Hasley and certified by Mr. Soares. It is assumed that percolation test <br /> procedures conformed to San Joaquin County Environmental Health Department policy. <br /> Percolation Test Procedure <br /> Mr. Hasley conducted the percolation test for the boring on August 25, 2017. A four- <br /> hour test was selected. Water level measurements were taken every half-hour during <br /> this four-hour period. Steven Shih, Senior Registered Environmental Health Specialist <br /> at the San Joaquin County Environmental Health Department, observed the last half- <br /> hour of the test. <br /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 2 of this report. The form <br /> was signed by Mr. Shih and indicates a percolation rate for the hole based on the final <br /> water drop observed. <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 35 and 42 inches; a satisfactory percolation <br /> rate for a shallow test is less than or equal to 60 minutes per inch (min/in) drop. For the <br /> Site to utilize a standard septic system, one percolation test must demonstrate a <br /> satisfactory percolation rate within the proposed septic system disposal field. <br /> Details and results of the percolation testing are summarized in the following table. <br /> LOGE 1729 Page 6 <br />