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File No. 20-3563-01' �� �LEINFELDER <br /> March 3 , 1992 <br /> site area consists of agricultural land with scattered <br /> residences and a dairy. <br /> On February 27 , 1992 , a representative of our firm visited <br /> five residences located off Bethany and Naglee Roads. The <br /> purpose of the visits was to obtain information on septic <br /> system use and to inquire about any problems known to exist <br /> with this method of sewage disposal. None of the residents <br /> questioned reported having problems with the performance of <br /> their septic systems. We were informed that their private <br /> wells generally produced "hard" quality water. Four of the <br /> five residences used water softeners. <br /> ITEM C-2 • <br /> "The suitability of the soil for development utilizing septic <br /> systems ; " <br /> On February 24 , 1992 , 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 February 25 , 1992 , our representative returned to the <br /> site to perform the percolation tests. As per San Joaquin <br /> County guidelines, the tests were performed for a period of <br /> 4 hours. The last 30 minutes of each test were used to <br /> calculate the percolation rates. In order to use standard <br /> leach lines, the County requires a percolation rate of 60 <br /> minutes per inch, or faster, at the 3-foot depth. A <br /> passing percolation rate of 60 minutes per inch was <br /> obtained for the test performed on the proposed 10-acre <br /> parcel. A failing test was obtained for the test performed <br /> on the designated remainder parcel . <br /> On February 26, 1992 , a representative of our firm returned <br /> to the site and drilled and set-up three additional 3-foot <br /> deep test holes on the designated remainder parcel . On <br /> February 27 , 1992 , our representative returned to the site <br /> and performed the percolation tests. A passing percolation <br /> rate of 11 minutes per inch was obtained. <br /> The approximate locations where the passing percolation <br /> rates were obtained are shown on Plate I . The County <br /> approved percolation test sheets are included with this <br /> report. <br /> Copyright 1992 Kleinfelder, Inc. Page 2 of 4 <br />