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Final Release LLNL Site 300 (USDOE) <br /> these homes for washing,bathing, cleaning, etc. Twelve of the 14 homes are situated along Tesla <br /> Road in Alameda County—upgradient from all confirmed groundwater plumes on Site 300. The <br /> other two residences are located on a small tract of land owned by CSVRA that lies on the same <br /> side of Corral Hollow Road as Site 300. Wells located in this area also serve as the sole water <br /> source for visitors to CSVRA. These homes are downgradient from contaminant plumes <br /> originating from the Pit 6 OU (OU-3). These plumes are not predicted to go off-site at levels <br /> above the MCLS. The groundwater is filtered and chlorinated to control bacteria before use <br /> (Dana Jones,Acting District Director, Carnegie State Vehicle Recreation Area,personal <br /> communication,August 26, 2003). There have been no anthropogenic contaminants detected <br /> above comparison values at any of the wells on CSVRA property. <br /> in <br /> a '� r m <br /> Spring; ¢ ; 0 tea, <br /> r c <br /> o o <br /> ♦ 2 ♦ Z <br /> rd a r °' ° <br /> ry U rd V <br /> or or m <br /> Mrs �- <br /> '"`,� <br /> N l O o N r v <br /> I Scale:meters r <br /> 0 150 300 1 <br /> r <br /> Extent <br /> I <br /> of ••• <br /> in Spring 2002 <br /> VSIEI V <br /> o24 <br /> o <br /> ,G°i ' CP <br /> Figure 5:Successful Reduction of the TCE Plume at the GSA of Site 300 <br /> Current Exposure <br /> Currently, off-site residents are not being exposed to contaminated groundwater originating <br /> from Site 300. Off-site contamination has only occurred in two locations at Site 300; both are in <br /> the GSA (OU-1). The eastern GSA plume has been treated to levels below drinking water <br /> standards off-site (Figure 5). Figure 6 shows VOC concentrations for the central GSA plume and <br /> the proximity of water supply wells. There are no completed pathways for current exposures <br /> because a completed pathway implies that a human is currently being exposed to contaminants <br /> from Site 300. No human is currently being exposed to off-site contaminated groundwater from <br /> 15 <br />