Laserfiche WebLink
k`■ KLEINFELDER <br /> File No. 20-3371-01 <br /> July 18, 1990 <br /> On July 12 , 1990, a representative of our firm returned to <br /> the site to perform the 3-foot deep percolation test. As <br /> per San Joaquin County guidelines, the test was performed <br /> for a period of 4 hours. The last 30 minutes of the test <br /> were used to calculate the percolation rate. 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 depth. <br /> The 3-foot deep test performed passed with a percolation <br /> rate of 10 minutes per inch. The county approved <br /> percolation test sheet is included with this report. <br /> ITEM C-3 • <br /> "The depth and gradient of the groundwater table. " i <br /> During our residence surveys on July 13 , 1990, we were able <br /> to measure groundwater in 3 wells. The groundwater was <br /> measured at between 26 to 28 feet below existing ground <br /> surface. Groundwater was estimated at approximately 28 <br /> feet deep by 1 other well owner, where mea=surements could <br /> not be obtained. Regional groundwater ma�s published by <br /> the San Joaquin County Flood Control and Water Conservation <br /> District, Plate II, indicate groundwater in this area was <br /> approximately 25 to 30 feet below existing ground surface <br /> in the fall of 1989. <br /> Based on County requirements for a small single parcel <br /> split, we are not required to establish an on-site <br /> groundwater gradient by drilling test borings. We are <br /> providing a general estimate of the groundwater gradient <br /> 3 <br />