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20 November 2020 AdvancedGeo Project No. 20-6205 An Employee-Owned Company Page 8 of 14 .� 6.3. DESCRIPTION OF THE PERCOLATION TEST HOLE - POST SOAK On 13 November 2020, 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 13 November 2020, the percolation test hole was dry after sitting overnight. Percolation test procedure #2 was performed by adding water to approximately six inches above the gravel and recording the amount of water remaining in the borehole after 30- minute intervals. 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 measurement was 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 C. 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 C. 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 50 minutes per inch was calculated from data collected during the four- hour percolation test; the smallest reading over the four-hour period was used to calculate the percolation rate. The use of the existing and proposed septic systems should follow the San Joaquin County On-site Wastewater Treatment Standards. 7.0. CHEMICAL AND PHYSICAL PROPERTIES OF SOIL Soil chemical properties were supplied by regionally sourced material for the surrounding area.