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File No. 20-3672-01 KLEINFELDER November 19, 1992 Reference is made to Plate I of this report which shows the location of the Shively property. At the time of our field explorations, the property contained grape vineyards and pastures. The surrounding area contains predominately orchards with some grape vineyards, pastures, and other crops. On October 8, 1992, a representative of our firm visited four residences at the approximate locations shown on Plate I. The purpose of the visits was to obtain information regarding septic system use and to inquire about any problems known to exist with this method of sewage disposal. Three residents reported having no problems with their septic systems. One resident reported having problems with their leach lines several years ago; however, the problem was corrected under County permit, as noted below. Our representative performed a review of County septic system permit records. The permit records show one repair listed for the residence at 26950 Mackville Road. A sump pit and additional leach line were added, and the problem was corrected. No other permits for the residences in the surrounding area were on record. ITEM C-2: "The suitability of the soil for development utilizing septic systems;" On October 20, 1992, a representative of our firm drilled and set-up one approximate 3-foot deep percolation test hole on each of the proposed parcels 1 and 2 at the approximate locations shown on Plate I. The test holes were drilled with hand drilling equipment using a 6-inch diameter, continuous-flight auger. Because of hard soils, we were not able to drill the remaining parcels using hand equipment. Perforated PVC pipe was inserted into the test holes to prevent disturbance when adding water. The test holes were filled with relatively clean water and were left to soak overnight. On October 21, 1992, our representative returned to the site to perform the percolation tests on parcels 1 and 2. As per San Joaquin County guidelines, the tests were performed for a period of four hours. The last 30 minutes of each test were used to calculate the percolation rates. In order to use standard leach lines, the County requires a percolation rate of 60 minutes per inch, or faster. The tests performed passed with percolation rates of 60 minutes per inch for each parcel. On October 26, 1992, representatives of our firm returned to the site and drilled and set-up one approximate 3-foot deep, one approximate 10-foot deep, and one approximate 15-foot deep percolation test hole on the three remaining proposed parcels at the approximate locations indicated on Plate I. The test holes were drilled with a truck-mounted drill rig equipped with 6-inch diameter, continuous-flight augers. Copyright 1992 KLeinfelder, Inc. Page 2 of 5