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GEOCHECW - PHYSICAL SETTING SOURCE SUMMARY <br /> AR=OUNDWATER 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, hydrogeologac data <br /> collected on nearby properties,and regional groundwater flow information (from deep aquifers) <br /> TOPOGRAPHIC INFORMATION <br /> Surface topography maybe indicative of the direction of surflcial 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-H3 STOCKTON WEST, CA <br /> Source USGS 7 5 min quad index <br /> GENERAL TOPOGRAPHIC GRADIENT AT TARGET PROPERTY <br /> Target Property General West <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 /> 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 Q3 Flood <br /> Target Property County Data Electronic Coverage <br /> SAN JOAQUIN, CA YES-refer to the Overview Map and Detail Map <br /> I Flood Plain Panel at Target Property 0603020020D I CBPP <br /> I Additional Panels in search area 0603020015D 1 CBPP <br /> 0602990430B 1 CBPP <br /> I 0602990435B I CBPP <br /> NATIONAL WETLAND INVENTORY <br /> NWI Electronic <br /> NWI Quad at Target Property Coverage <br /> STOCKTON WEST 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 hydrogeologac 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 /> TC630504 2s Page A-2 <br />