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02 March 2023 AdvancedGeo <br /> Project No. 23-7124 An Employee-Owned Company <br /> Page 7 of 14 <br /> soil type 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 /> SR0080276 using a four-inch diameter soil boring established to a depth of 36 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 E (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 #2). The <br /> percolation test hole was pre-soaked overnight for 24 hours followed by a 4-hour <br /> percolation testing period. <br /> 6.2. CONSTRUCTION OF PERCOLATION TEST HOLE <br /> On 18 April 2019, one boring was advanced for a shallow percolation test. The boring <br /> was advanced using a four-inch diameter hand auger to a depth of 36 inches bsg. <br /> Following borehole advancement, the sides of the borehole were scraped, and loose <br /> material was removed from the borehole. Once the borehole was cleared of loose <br /> material, two inches of fine gravel was added to the bottom of the borehole. The borehole <br /> was then filled with water to a depth of 12 inches above the gravel and the test hole was <br /> then covered for 24 hours to allow for complete saturation of the borehole. <br /> 6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK <br /> On 19 April 2019, the borehole was found to be completely dry, intact and in good <br /> 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 19 April 2019, Percolation test procedure #2 was performed by adding water to <br /> approximately six inches above the gravel and recording the amount of water remaining <br />