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15 November 2019 AdvancedGeo AGE Project No. 19-4912 Environmental Page 7 of 14 .f hole is included in Appendix B (EHD form 42-03 revised 11/02/2009). The soil suitability study was conducted within the area of the proposed septic system leach field. 6.1 . NUMBER OF PERCOLATION TESTS PERFORMED One shallow percolation test was performed at the site. The appropriate percolation test procedure established by the EHD was followed for the test (Procedure #3). The percolation test hole was pre-soaked overnight for 24-hour followed by a one-hour percolation testing period. 6.2. CONSTRUCTION OF PERCOLATION TEST HOLE On 13 November 2019, one boring was advanced for a shallow percolation test. The boring was advanced using a four-inch diameter hand auger to a depth of 42 inches bsg. The boring was located within the area of the proposed septic system disposal field. Following borehole advancement, the sides of the boring were scraped, and loose material was removed from the borehole. Once the borehole was cleared of loose material, two inches of coarse sand was added to the borehole. The borehole was then filled with water to a depth of 12 inches above the sand at the time of 0850. The test hole was then covered for 24 hours to allow for complete saturation of the borehole. 6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK On 14 November 2019, the boring was found to be completely dry, intact and in good condition. 6.4. PERCOLATION TEST CONFORMED TO SJC POLICY EHD 98-02 The work was performed in accordance with San Joaquin County Division 11 Section 9-1105.2 (d) General Requirements. On 14 November 2019, the percolation test hole was dry after sitting overnight. Percolation test procedure #2 was initially performed by adding water to approximately six inches above the sand and recording the amount of water remaining in the borehole after 30-minute intervals. However, after only 10 minutes all the water drained out of the test hole. Therefore, procedure #3 was performed by adding water to approximately six inches above the sand and recording the amount of water remaining in the borehole at 10-minute intervals for one hour. The water level was measured from a fixed reference point at the surface of the boring using a Solinst water level meter. Measurements were recorded at 10-minute intervals for one hour. The final measurement was observed by the EHD inspector. Based on the field measurements collected, the percolation rate for