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File No. 20-3514-01 k%J K L E I N F E L D E R <br /> September 11, 1991 <br /> 4 . Recommendations for foundations, including recommended <br /> maximum allowable soil bearing pressures and lateral- <br /> earth pressures. <br /> 5 . Recommendations for support of slab-on-grade floors. <br /> 6 . Recommendations for site preparation and grading. <br /> 7 . Recommendations for pavement sections. <br /> 8 . Results of percolation tests and comments for use in <br /> septic system design. <br /> 9 . Comments regarding existing septic systems in the <br /> area, depth to groundwater and groundwater gradient. <br /> s A water sample was obtained from the existing on-site well and was <br /> delivered to FGL Environmental in Stockton for DBCP testing. The <br /> test result will be submitted under separate cover as soon as it <br /> is available. <br /> SITE CONDITIONS <br /> At the time of our field explorations, the majority of the <br /> relatively flat site contained pasture. An exception was a <br /> residence with associated outbuildings located at the northwest <br /> corner of the site. The south end of the site is slightly lower <br /> than the remainder of the property, and we understand that after <br /> heavy rains water stands on the surface of the south portion of <br /> the site for several days. Plans provided to our firm indicate an <br /> a irrigation easement is present along the south approximate 1/2 of <br /> the east border of the site. However, the precise locations of <br /> any underground irrigation lines and/or utilities or any other <br /> buried objects at the site are not known to our firm at this time. <br /> FIELD EXPLORATIONS <br /> The field explorations for this project consisted of drilling four <br /> test borings, drilling and performing a percolation test on each <br /> of the four proposed parcels, surveying residences adjacent to the <br /> site, collecting one near-surface soil sample for R-Value testing, <br /> and collecting a water sample from the on-site well for DBCP <br /> testing. The borings extended to depths of approximately 10 to 15 <br /> feet, and the percolation tests were performed at a depth of <br /> _. approximately 3 feet below existing ground surface. The <br /> percolation test holes were drilled on August 21, 1991 using hand <br /> drilling equipment, and the borings were drilled on August 26, <br /> _ 1991, using a truck-mounted drill rig equipped with 6-inch <br /> diameter continuous-flight augers. <br /> Copyright 1991 KLeinfelder, Inc. Page 2 of 13 <br />