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A <br /> • GEOCHECW - 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 /> TARGET PROPERTY TOPOGRAPHY <br /> USGS Topographic Map 2437121-N3 STOCKTON WEST, CA <br /> General Topographic Gradient General SW <br /> Source USGS 7 5 min quad index <br /> SURROUNDING TOPOGRAPHY ELEVATION PROFILES <br /> c <br /> 0 <br /> North South <br /> TP <br /> I <br />� o <br /> m <br /> a <br /> m <br /> °' <br />` West East <br /> TP <br /> Target Property Elevation 23 ft 0 1/2 1 Miles <br /> Source Topography has been determined from the USGS Digital Elevation Model and should be evaluated <br /> on a relative(not an absolute) basis Relative elevation information between sites of close proximity <br /> should be field verified <br /> TC0973142 1s Page A-2 <br />