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21300 MANN ROAD Project No.2019-00095 P a g e 11 <br /> 8.2 Percolation Test Procedure <br /> One percolation test was conducted for the boring on November 5, 2019 in accordance with the <br /> requirements of the EHD. A four-hour percolation test was performed for the test. The last half hour <br /> of the test was observed by Daria Afonskaia, Registered Environmental Health Specialist,EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference point on the <br /> PVC casing using an electric well sounder with a depth accuracy of 1/100th foot. All tabulated values <br /> on the field data sheet are in decimal feet. After water drop was observed,the hole was checked for <br /> refill. The refill level was approximately 0.5 ft (6 inches) of water above the bottom level of the <br /> percolation test hole. The readings were taken every 30 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 D of this report. <br /> A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a <br /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop.The <br /> percolation test must demonstrate a satisfactory percolation rate within the proposed septic system <br /> disposal field of each parcel to utilize a standard septic system. Details of the percolation test is <br /> summarized in the table below. <br /> Table 6. <br /> Summary of Percolation Test— November 1, 2019 <br /> Test No., Percolation Percolation Test Comments <br /> Date Tested Test Rate Depth (feet) (minutes/inch) Duration (see notes) <br /> 21300 Mann Road <br /> P-1 (shallow) 3.25 31.25 4 hours 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 <br /> 1 minute per inch. <br /> The soil within the percolation test area for 21300 Mann Road demonstrated a satisfactory <br /> percolation rate in accordance with the requirements of the EHD for the use of a standard septic <br /> system. <br /> 9.0 SOIL SUITABILITY STUDY CONCLUSIONS <br /> In summary, a percolation rate that meets the minimum EHD standards was achieved within the <br /> proposed septic disposal area for the parcel located at 21300 Mann Road; the soil appears suitable <br /> for the use of a standard septic system. <br /> No ground water was encountered in the boring drilled on the property. There is no operable well <br /> onsite to test nitrate and DBCP. <br /> Petralogix Engineering,Inc. <br /> 26675 Bruella Road,Galt,ca 95632 <br /> (209)-400-5729 1W <br /> www.petralogix.com <br />