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File No. 20-2949-19 k" KLEINFELDER <br /> November 21, 1991 <br /> Reference is made to Plate I of this report which shows the <br /> location of the Teicheira property. The majority of the <br /> site area consists of agricultural and pasture land with <br /> scattered farm houses and dairies. <br /> On October 22 , 1991, a representative of our firm visited <br /> five residences located on the site and surrounding the <br /> site off Union, Perrin and Manteca Roads. The purpose of <br /> the visits was to obtain information on septic system use <br /> and to inquire about any problems known to exist with this <br /> method of sewage disposal. Residents questioned at two of <br /> the locations visited reported having no problems with the <br /> performance of their septic systems. No one was home at <br /> the remaining three residences. The residents questioned <br /> reported their wells produced "hard" water and one uses a <br /> water softener. <br /> ITEM C-2 • <br /> "The suitability of the soil for development utilizing septic <br /> systems; " <br /> On November 7, 1991, a representative of our firm drilled <br /> and set-up one 3-foot deep percolation test hole on the <br /> proposed 10-acre parcel and on the designated remainder <br /> parcel. The test holes were drilled with hand drilling <br /> equipment using a 6-inch diameter continuous-flight auger. <br /> Perforated PVC pipe was inserted into the test holes to <br /> prevent disturbance when adding water. The test holes were <br /> filled with relatively clean water and left to soak <br /> overnight. <br /> On November 8 , 1991, our representative returned to the <br /> site to perform the 3-foot deep percolation tests. As per <br /> San Joaquin County guidelines, the tests were performed for <br /> a period of 4 hours. The last 30 minutes of each test were <br /> used to calculate the percolation rates. In order to use <br /> standard leach lines, the County requires a percolation <br /> rate of 60 minutes per inch, or faster, at the 3-foot <br /> depth. The 3-foot deep tests performed passed with <br /> percolation rates of 9 and 10 minutes per inch for the 10- <br /> acre parcel and the designated remainder parcel, <br /> respectively. The County approved percolation test sheet <br /> is included with this report. <br /> ITEM C-3• <br /> "The depth and gradient of the water table;" <br /> During our residence surveys on October 22 , 1991, we were <br /> able to measure groundwater in four wells. The groundwater <br /> Copyright 1991 Kleinfelder, Inc. Page 2 of 4 <br />