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File No. 20-2949-12 KLEINFELDER <br /> August 6, 1990 <br /> L E <br /> S f <br /> AUG 13 1990 <br /> EMIRONMN i AL HEALTI <br /> PERMIT/SERVICES <br /> On July 19 , 1990, a representative of our firm <br /> returned to the site to perform the 3-foot deep <br /> percolation tests . As per San Joaquin County <br /> guidelines, the tests were performed for a period <br /> of 4 hours . The last 30 minutes of each test were <br /> used to calculate the percolation rates . In order <br /> to use standard leach lines, the County requires a <br /> percolation rate of 60 minutes per inch, or faster, <br /> at the 3-foot depth. The 3 3-foot deep tests <br /> performed passed, and the percolation rates are <br /> presented in Table I, below. The county approved <br /> percolation test sheets are included with this <br /> report. <br /> TABLE I <br /> PERCOLATION TEST RESULTS <br /> PERLOCATION <br /> TEST LOCATION/NO. DEPTH (FEET) RATE (MINS/INCH) <br /> Parcel 1/P-1 3 6 <br /> Parcel 2/P-2 3 7-1/2 <br /> Parcel 3/P-3 3 7-1/2 <br /> ITEM C-3• <br /> "The depth and gradient of the groundwater table. " <br /> During our residence surveys on July 23, 1990, we <br /> were able to measure groundwater in 3 wells . The <br /> groundwater was measured at between 35 to 38 feet <br /> below existing ground surface. Groundwater was <br /> estimated at approximately 30 feet deep by 1 other <br /> 3 <br />