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Percolation Test <br /> TEST conducted shallow and deep percolation tests in March of 2010. The soil borings <br /> discussed above were used for the percolation test holes. <br /> Preparation and Presaturation of Percolation Test Holes <br /> According to TEST, after the borings were advanced and the soil logged, the test holes <br /> were completed for the percolation testing. Approximately two inches of coarse sand <br /> were placed in the bottom of each open soil boring. <br /> TEST reportedly presoaked the percolation test holes approximately 24 hours prior to <br /> the percolation testing. On the day of testing, the deep hole was found to be intact and <br /> dry; standing water was observed in the shallow hole. <br /> Percolation Test Procedure <br /> Four-hour percolation tests were performed by TEST. Water level measurements were <br /> taken every 30 minutes during this four-hour period. The test form (Appendix 4) was <br /> signed by Michael Escotto, Registered Environmental Health Specialist at the San <br /> Joaquin County Environmental Health Department. <br /> According to TEST, a rigid steel measuring tap was used for the water level <br /> measurements. After each 30-minute period, the hole was refilled with water to a level <br /> of approximately six inches above the bottom of the hole. <br /> Percolation Test Results <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation <br /> rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than <br /> or equal to 60 min/in drop. A deep percolation test hole has a depth between 3.5 and <br /> 25 feet; a satisfactory percolation rate for a deep test is greater than or equal to 1 <br /> minute per inch (min/in) but less than or equal to 30 min/in drop. For the Site to utilize a <br /> standard septic system, one percolation test (shallow or deep) must demonstrate a <br /> satisfactory percolation rate within the proposed septic system disposal field. Details <br /> and results of the percolation testing are summarized in the following table. <br /> LOGE 1939 Page 7 <br />