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' <br /> File No. 20-3389-01 �j KLEINfEII)ER <br /> September 24 , 1990 <br /> On September 4, 1990, representatives of our firm drilled <br /> and set-up 1 3-foot deep percolation test hole at each of <br /> the proposed parcels. The approximate locations of the <br /> percolation tests are shown on Plate I. The test holes <br /> were drilled with hand drilling equipment using a 6-inch <br /> diameter continuous-flight auger. Perforated PVC pipe was <br /> inserted into the test holes to prevent disturbance when <br /> adding water. The test holes were filled with relatively <br /> clean water and left to soak overnight. <br /> On September 5, 1990, our representatives returned to the <br /> site to perform the percolation tests. As per San Joaquin <br /> County guidelines, the tests were performed for periods of <br /> from 1 to 4 hours. The last 30 minutes of each test were <br /> used to calculate the percolation rates presented below. <br /> PERCOLATION TEST RESULTS <br /> Percolation Rate <br /> Test/Parcel No. Depth (Feet) (Mins Inch) <br /> 1 3 5 <br /> 2 3 60 <br /> 3 3 3-1/2 <br /> 4 3 60 <br /> In order to use standard leach lines, the County requires <br /> a percolation rate of 60 minutes per inch, or faster, at <br /> the 3-foot depth. All the 3-foot deep tests performed <br /> 3 <br />