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23 October 2019 AdvancedGeo <br /> AGE Project No. 19-4881 F ri v i ro n m e n t a I <br /> Page 8 of 15 <br /> 6.0. PERCOLATION TEST INFORMATION <br /> A percolation soil suitability test was performed at the site under EHD permit No. <br /> SR0081231 using a four-inch diameter soil boring established to a depth of 39 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 D (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-hour followed by a four-hour <br /> percolation testing period. <br /> 6.2. CONSTRUCTION OF PERCOLATION TEST HOLE <br /> On 10 October 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 39 inches bsg. The <br /> boring was located within the area of the proposed septic system disposal field. 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 coarse sand was added to the borehole. The borehole was then filled with water to a <br /> depth of 12 inches above the sand at the time of 0850. 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 11 October 2019, the boring 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 11 October 2019, the percolation test hole was dry after sitting overnight. Percolation <br /> test procedure #2 was performed by adding water to approximately six inches above the <br /> sand and recording the amount of water remaining in the borehole at 30-minute intervals <br /> for a period of four hours. Additional water was added to the boring after each 30-minute <br /> interval as required to ensure that approximately six inches of water remained above the <br />