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1 <br /> J1 GEOCHECI(® TPHYSICAL SETTING SOURCE.SUMMARY'. <br /> i <br /> GROUNDWATER FLOW DIRECTION INFORMATION <br /> Groundwater flow direction for a particular site <br /> _"est 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 /> i <br /> 4 <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: 2437121-F4 TRACY, CA <br /> Source: USGS 7.5 min quad index <br /> GENERAL TOPOGRAPHIC GRADIENT AT TARGET PROPERTY <br /> Target Property: General NE <br /> Source: General Topographic Gradient has been determined from the USGS 1 Degree 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 /> I <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: 0602990710A <br /> Additional Panels in search area: 0602990720A <br /> NATIONAL WETLAND INVENTORY <br /> NWl Electronic <br /> NWI Quad at Target Property 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 /> TC890744.3s Page A-2 <br />