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GEOC -IECK® - PHYSICAL�SETTING-SOURCE SUMMARY <br />' GROUNDWATER FLOW DIRECTION INFORMATION <br /> Groundwater flow direction for a particular site Is best determined by a qualified environmental professional <br /> using site-specific well data If such data is not reasonably ascertainable, it may be necessary to rely on other <br /> sources of information,such as surface topographic information, hydrologic information hydrogeologic data <br /> collected on nearby properties,and regional groundwater flow Information(from deep aquifers) <br /> TOPOGRAPHIC INFORMATION <br /> Surface topography may be Indicative of the direction of surficial groundwater flow This Information can be used to <br /> assist the environmental professional in forming an opinion about the Impact of nearby contaminated properties or, <br />' should contamination exist on the target property,what downgradient sites might be Impacted <br /> USGS TOPOGRAPHIC MAP ASSOCIATED WITH THIS SITE <br /> Target Property 2437129-F4 TRACY,CA <br /> Source USGS 7 5 min quad index <br /> GENERAL TOPOGRAPHIC GRADIENT AT TARGET PROPERTY <br /> 1Target Property General North <br /> Source General Topographic Gradient has been determined from the USGS Digital Elevation Model and <br /> should be evaluated on a relative(not an absolute)basis Relative elevation information between sites of <br /> close proximity should be field verified <br /> HYDROLOGIC INFORMATION <br /> + Surface water can act as a hydrologic barrier to groundwater flow Such hydrologic information can be used to assist <br /> the environmental professional in forming an opinion about the impact of nearby contaminated properties or,should <br /> contamination exist on the target property,what downgradient sites might be impacted <br />' Refer to the Physical Setting Source Map following this summary for hydrologic information(major waterways <br /> and bodies of water) <br /> FEMA FLOOD ZONE <br /> FEMA Flood <br /> Target Property County Electronic Data <br /> SAN JOAQUIN CA YES-refer to the Overview Map and Detail Map <br /> Flood Plain Panel at Target Property 0603030005A <br /> Additional Panels in search area 0602990710A <br /> NATIONAL WETLAND INVENTORY <br /> NWI Electronic <br /> NWI Quad at Target Propel Data Coverage <br /> TRACY YES-refer to the Overview Map and Detail Map <br /> HYDROGEOLOGIC INFORMATION <br /> Hydrogeologic information obtained by installation of wells on a specific site can often be an indicator <br /> of groundwater flow direction in the immediate area Such hydrogeologic information can be used to assist the <br /> environmental professional in forming an opinion about the impact of nearby contaminated properties or,should <br /> contamination exist on the target property,what downgradient sites might be impacted <br /> TC945756 4s Page A-2 <br />