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06 Jul Oi <br /> EXPLANATION <br /> Groundwater monitoring well <br /> Q Groundwater elevation contour in feet <br /> Oreferenced to site datum Arrows indicate <br /> approximate groundwater flow direction <br /> 6238 Groundwater elevation in feet referenced <br /> Wto site datum <br /> (<0 500) Benzene concentration in parts per billion <br /> (ppb) <br /> (<2 50) MTBE concentration in ppb by EPA <br /> \ o Method 8260 <br /> W \ <x Not detected at detection limit x <br /> 0Approximate <br /> hydraulic gradient=0 02 <br /> ►.� Dispenser Island \ <br /> (typ) <br /> 0 <br /> Station <br /> Building \ <br /> 0 <br /> MW-3 0 <br /> 6691 <br /> -- - (<0 50) <br /> i I (24) ` MW-2 <br /> \ <br /> 6694 <br /> Existing (<0 50) <br /> USTs *(<5 0) <br /> 668\• <br /> Planter 665 \ <br /> � o <br /> 662 - Former UST <br /> Location <br /> _MW-1� <br /> 6606 - <br /> (<0 50>==l <br /> (<5 a) —N— <br /> HAMMER LANE <br /> Scale(ti) FIGURE <br /> 0 15 30 60 2 <br /> Batic map Yrum Fugro m y of 6 Fcb96 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 7910 Lower Sacramento Road Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A May 11, 2001 <br />