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29 May 2020 AdvancedGeo <br /> Project No. 20-6014 .n Employee-Owned Company <br /> Page 7 of 14 <br /> fine-grained sand from surface grade 42 inches bsg. The soil type at the base of the <br /> borehole is considered semi-permeable to permeable and should be sufficient for liquid <br /> waste disposal and treatment. <br /> 6.0. PERCOLATION TEST INFORMATION <br /> A percolation soil suitability test was performed at the site under EHD permit No. <br /> SR0082065 using a four-inch diameter soil boring established to a depth of 42 inches <br /> bsg. A site map showing the approximate location of the percolation test hole is illustrated <br /> in Figure 2. A precise description of the location and construction of the percolation test <br /> hole is included in Appendix C (EHD form 42-03 revised 11/02/2009). The soil suitability <br /> study was conducted within the area of the proposed septic system leach field. <br /> 6.1. NUMBER OF PERCOLATION TESTS PERFORMED <br /> One shallow percolation test was performed at the site. The appropriate percolation test <br /> procedure established by the EHD was followed for the test (Procedure #3). The <br /> percolation test hole was pre-soaked overnight for 24 hours followed by a one-hour <br /> percolation testing period. <br /> 6.2. CONSTRUCTION OF PERCOLATION TEST HOLE <br /> On 21 May 2020, one boring was advanced for a shallow percolation test. The boring was <br /> advanced using a four-inch diameter hand auger to a depth of 42 inches bsg. Following <br /> borehole advancement, the sides of the boring were scraped, and loose material was <br /> removed from the borehole. Once the borehole was cleared of loose material, two inches <br /> of fine gravel was added to the borehole. The borehole was then filled with water to a <br /> depth of 12 inches above the gravel at the time of 0815. The test hole was then covered <br /> for 24 hours to allow for complete saturation of the borehole. <br /> 6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK <br /> On 22 May 2020, the boring was found to be completely dry, intact and in good condition. <br /> 6.4. PERCOLATION TEST CONFORMED TO SJC POLICY EHD 98-02 <br /> The work was performed in accordance with San Joaquin County Division 11 <br /> Section 9-1105.2 (d) General Requirements. <br /> On 22 May 2020, the percolation test hole was dry after sitting overnight. Percolation test <br /> procedure #2 was initially performed by adding water to approximately six inches above <br />