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I <br />' GEOCHECe - PHYSICAL SETTING SOURCE SUMMARY <br /> GROUNDWATER FLOW DIRECTION INFORMATION <br /> Groundwater flow direction far 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 mformation, hydrogeologrc 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-H3 STOCKTON WEST, CA <br /> General Topographic Gradient General SW <br />' Source USGS 7 5 min quad index <br /> SURROUNDING TOPOGRAPHY ELEVATION PROFILES <br /> 1 <br /> Ic <br /> 0 <br /> cc <br /> > m b N N <br /> i7 G> N N v v v hNi u u <br /> INorth South <br /> TP <br /> I <br /> I <br /> 0 <br /> I01 <br /> .N- - - ►] - - - - - - - - - - -a r N N N V V fN., d N N N N N N N N <br /> u.i Ot V r T V m <br /> West East <br /> TP <br /> 0 1/2 1 Miles <br /> Target Property Elevation 23 ft <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 /> TC09731421s Page A-2 <br />