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476 N Patton Avenue Project No. 2021-00084 P a g e 112 <br /> 8.2 Percolation Test Procedure <br /> One percolation test was conducted for the boring on September 29, 2021, in accordance <br /> with the requirements of the EHD. A four-hour percolation test was anticipated; however, <br /> the percolation test hole was dry after the initial 30-minute test, therefore, a one-hour test <br /> was performed. The last ten minutes of the test was observed by Mr. Naseem Ahmed, an <br /> Environmental Health Specialist for San Joaquin County EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference point <br /> on the PVC casing using an electric well sounder with a depth accuracy of 1/100th foot. All <br /> tabulated values on the field data sheet are in decimal feet. After water drop was observed, <br /> the hole was checked for refill. The refill level was approximately 0.5 ft (6 inches) of water <br /> above the bottom level of the percolation test hole. The readings were taken every 30 <br /> minutes for a period of four (4) hours. <br /> 8.3 Percolation Test Form and Results <br /> The completed percolation test permit and test form are included in the Appendix E of this <br /> report. A shallow percolation test is defined by the EHD as being between 36 and 42 inches <br /> in depth; a satisfactory percolation rate for a shallow test is less than or equal to 60 minutes <br /> per inch drop. The percolation test must demonstrate a satisfactory percolation rate within <br /> the proposed septic system disposal field of each parcel to utilize a standard septic system. <br /> Details of the percolation test is summarized in the Table 7: <br /> Table 7. <br /> Summary of Percolation Test- September 29, 2021 <br /> Percolation percolation <br /> Test No., Test Rate Test Comments <br /> Date Tested Depth (minutes/inch) Duration (See notes) <br /> (inches) <br /> 476 N Patton Avenue <br /> P-1 (shallow) 42 3.21 1-hour Satisfactory <br /> Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch and greater than or equal to 1 <br /> minute per inch. <br /> The soil within the percolation test area for 476 N Patton Avenue demonstrated a <br /> satisfactory percolation rate in accordance with the requirements of the EHD for the use of <br /> a standard septic system. <br /> 9.0 SOIL SUITABILITY STUDY CONCLUSIONS <br /> In summary,a percolation rate that meets the minimum EHD standards was achieved within <br /> the proposed septic disposal area for the parcel located at 476 N Patton Avenue; the soil <br /> appears suitable for the use of a standard septic system. <br /> Petralogix Engineering,InC. <br /> 26675 BruelIa Road,Galt,Ca 95632 <br /> (209)-40o-5729 <br /> www.petralogix.com <br />