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• Soil Borings On March 28, 2017, Live Oak excavated shallow soil borings on the proposed Parcels 2, 3, and 4 of the Site, as well as shallow and deep soil borings on Parcel 1, for the purpose of conducting percolation tests. On May 8, 2017, Live Oak drilled a new shallow soil boring on Parcel 1 for an additional percolation test. The borings were four inches in diameter, 3.32, 11.82, 3.36, 3.46, 3.21, and 3.05 feet deep, and were excavated by hand auger (Table 2). The locations of the borings are indicated on Plate / �) 10. The soil in the borings was similar to that described by the Soil Survey. At location P1, silty clay was encountered to a depth of 2.5 feet, followed by fat clay to a depth of 6.5 feet, then sandy clay to a depth of 11.0 feet, then cemented clayey sand to the full depth of the boring. At location P1-B, fat clay was encountered to the full depth of the boring. At location P2, fat clay was encountered to a depth of 3.0 feet, followed by J. ' sandy clay to the full depth of the boring. At location P3, fat clay was encountered to a depth of 1.5 feet, followed by cemented clayey sand to a depth of 2.0 feet, then clayey sand to the full depth of the boring. At location P4, fat clay was encountered to a depth of 3.0 feet, followed by cemented clayey sand to the full depth of the boring. The soil logs are presented on Plates 11 through 15. Discussion of Soil Lithology • Based on the soil observed in the borings, there appears to be limited potential for percolation at the test locations. Sandy soils generally have a much greater potential 3 v for percolation than fine-grained or cemented soils. However, a percolation test is the only accepted method for determining the suitability of the soils for a septic disposal area. Percolation test results are discussed in the following section. Percolation Test Shallow percolation tests were conducted on the proposed Parcels 2, 3, and 4 of the Site. Shallow and deep percolation tests were conducted on Parcel 1. The soil borings >> discussed above were used for the percolation test holes (Plate 10). Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Holes After the borings were advanced by hand auger and the soils logged, the test holes were completed for the percolation testing. Approximately one inch of pea gravel was placed in the bottom of each open soil boring, followed by a 2.0-inch diameter PVC pipe " with perforations on the bottom. Pea gravel was then used to backfill a few inches of the annular space. • LOGE 1704 Page 6