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13 Feb-03 <br /> EXPLANATION <br /> HAMMER LANE Groundwater monitoring well <br /> Destroyed groundwater monitoring well <br /> ® Proposed groundwater monitoring well <br /> MW-4 Former UST Groundwater elevation contour in feet <br /> -32.12 Location _ MW-5 ft m <br /> - <br /> (<0.501 —--—--,.,`--—--—- __ referenced to mean sea level{ sI} <br /> -32.17 Arrows indicate approximate groundwater <br /> '(<0 50 j (<0 50) flow direction <br /> —4<050) <br /> -3217 Groundwater elevation in ft msl <br /> (<0 50) Benzene concentration in parts per <br /> Ex;sting' billion(ppb) <br /> USTs Wooded <br /> MW-8 <br /> (<0 50) MTBE concentration in ppb <br /> ' ® field <br /> f <x Not detected at reporting limit x <br /> MW-3 <br /> �de �. Approximate hydraulic gradient=0 001 <br /> -3209 MW-2 ` N <br /> MW-7 (Q0) <br /> � (4,300) h, -32.16 <br /> (<0 50) � <br /> (440) MW-9 <br /> � � � Building � <br /> Canopy and W E <br /> yDispenser Islands OMW-i <br /> I � tia I Domestic well <br /> 160 feet <br /> MW-6 S <br /> -3216 <br /> tib (<0 50) Waste Oil <br /> Flunj (<0 50) Tank <br /> --- — ------------- -- -- — -- - --------1 —N- <br /> -� FIGURE <br /> SaWe(ft) <br /> I � <br /> 0 20 40 80 2 <br /> rn <br /> o <br /> Shell-branded Service Station Groundwater Contour/Chemical <br /> 7700 Moreland Street G Concentration Map <br /> Stockton, Cafrfornia <br /> _ _ C A M B R 1 A December 5, 2002 <br />