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File No. 20-3554-01 k" KLEINFELDER January 22 , 1992 Reference is made to Plate I of this report which shows the location of the Fortuny property and the adjacent Scott/Johnson property. The majority of the site area consists of agricultural and pasture land with scattered residences. On August 13 , 1991, a representative of our firm visited four residences located north and south of the site. The purpose of the visits was to obtain informaticn on septic system use and to inquire about any problems known to exist with this method of sewage disposal . One of the residents questioned reported that his system drained rather slowly, and the system is pumped every 1-1/2 to 2 years. The remainder of the residents questioned reported no problems with their systems. The septic systems were reported to be up to 30 years old. The residents reported that their on- site wells produced "fair" to "good" quality water. One resident uses a water softener. ITEM C-2 : "The suitability of the soil for development utilizing septic systems ; " On January 16, 1992 , a ren_ resentative of our firm drilled and set-up one 3-foot deep percolation test hole on each of the four proposed parcels 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. 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 left to soak overnight. On January 17, 1992 , our representative returned to the site to perform the 3-foot deep percolation tests. As per San Joaquin County guidelines, the tests were performed for a period of 4 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, at the 3-foot depth. The 3-foot deep tests performed passed with percolation rates of 9-1/2 , 15, 17-1/2 and 24 minutes per inch for parcels 1 through 4 , respectively. The County approved percolation test sheets are included with this report. ITEM C-3 • "The depth and gradient of the water table;" Copyright 1992 Kteinfelder, Inc. Page 2 of 4