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i CE/NFELDER I <br /> /a„ m ftihik. Rightx <br /> 2.4 .4 Groundwater <br /> According to the San Joaquin County Flood Control and Water Conservation District's <br /> document titled "Groundwater Report," dated Spring 2008, the elevation of the unconfined <br /> aquifer beneath the Norman's Nursery area is approximately -10 feet mean sea level (msl ) , <br /> and groundwater flows towards the southwest. According to the same report, the depth to the <br /> unconfined aquifer in the area of the project site is approximately 140 to 150 feet below the <br /> ground surface (bgs) . <br /> Subsurface investigations in the area of the project site have shown shallow perched <br /> groundwater zones in some areas . The results of the subsurface investigations do not support <br /> continuity of perched groundwater zones across the site area . Evidence of springs and vernal <br /> pools also exist in the area . <br /> The origin of the shallow groundwater zones (assumed to be perched ) encountered in <br /> monitoring wells MW-2 and MW-5 , and test pits TP-2 and TP-4 is unknown . Its occurrence <br /> may be seasonal ; however, the absence of free water in the test pits in the center portion of <br /> the property and the historic lack of perched water in historical monitoring wells MW-4s and <br /> MW-4d , suggest multiple perched groundwater zones . In addition , the lack of perched <br /> groundwater in the center of the property appears to indicate that the perched groundwater in <br /> monitoring wells MW-2 and MW-5 does not represent a single continuous perched <br /> groundwater zone for which a groundwater flow direction and gradient can be calculated <br /> across the entire site. <br /> i <br /> 117226.E021ST013R0176 Page 6 of 40 January 31 , 2013 <br /> Copyright 2013 Kleinfelder <br />