Laserfiche WebLink
kNNj KLEINFELDER <br /> File No. 20-3460-01 <br /> May 16, 1991 <br /> On March 11, 1991, a representative of our firm visited <br /> four residences located off Highway 26 and Baldwin Lane, as <br /> shown on Plate I. The purpose of the visits was to obtain <br /> information on septic system use and to inquire about any <br /> problems known to exist with this method of sewage <br /> disposal . Three of the residents questioned reported <br /> having no problems with the performance of their septic <br /> systems. No one was home at the remaining residence <br /> (Location 3) . The septic systems were reported to be <br /> between approximately 10 and 50 years old. All of the <br /> residents questioned indicated that their wells produced <br /> "good" quality water. One resident indicated that they use <br /> a water softener. <br /> ITEM C-2 : <br /> "Suitability of soil for development utilizing septic systems. " <br /> On May 13 , 1991, a representative of our firm drilled and <br /> set-up one 3-foot deep percolation test hole on each of the <br /> proposed parcels. The test holes were drilled with hand <br /> drilling equipment using a 6-inch diameter continuous- <br /> flight auger. Perforated PVC pipe was inserted into the <br /> test holes to prevent disturbance when adding water. The <br /> test holes were filled with relatively clean water and left <br /> to soak overnight. <br /> On May 14 , 1991, our representative returned to the site to <br /> perform the 3-foot deep percolation tests. As per San <br /> Joaquin County guidelines, the tests were performed for a <br /> period of four hours. The last 30 minutes of each test <br /> were used to calculate the percolation rates. In order to <br /> use 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 30 minutes per inch for parcels 1 and <br /> 2 . The County approved percolation test sheets are <br /> included with this report. <br /> ITEM C-3 • <br /> "The depth and gradient of the groundwater table. " <br /> During our residence surveys on March 11, 1991, we were <br /> able to measure groundwater in four wells. The groundwater <br /> was measured at depths of approximately 97 to 100 feet <br /> below existing ground surface. The regional groundwater <br /> depth map published by the San Joaquin County Flood Control <br /> Copyright 1991 Kleinfelder, Inc. 2 Page 2 of 4 <br />