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13 August 2019 AdvancedGeo AGE Project No. 19-4782 L. i)v i ro n menta I Page 8 of 14 6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK On 19 June 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 19 July 2019, the percolation test was performed by recording the amount of water remaining in the borehole at 30-minute intervals for a period of four hours. Additional water was added to the boring after each 30-minute interval as required to ensure that approximately six inches of water remained above the gravel. 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 30-minute intervals for four hours. The final two measurements were observed by the EHD inspector. Based on the field measurements collected, the percolation rate for the parcel was calculated; the Percolation Test Rate Field Sheet is provided in Appendix D. 6.5. COMPLETED PERCOLATION TEST FORM After completion of the test, the EHD inspector reviewed the field data and signed the required EHD Percolation Test Rate form. Field measurements recorded during the test are included on the Percolation Test Rate Field Sheet provided in Appendix D. 6.6. POTENTIAL PROBLEMS PREDICTED On site soils within the shallow percolation test hole demonstrated adequate percolation rates. 6.7. PERCOLATION TEST FINDINGS The shallow percolation test performed provided a satisfactory percolation test rate. The percolation rate of 41.67 minutes per inch was calculated from data collected during the four-hour percolation testi the smallest readin over the four-hour period was used to calculate the percolation rate. The use of the proposed septic system should follow the San Joaquin County On-site Wastewater Disposal Standards. 7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL Soil chemical properties were supplied by regionally sourced material for the surrounding area.