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EXPLANATION <br /> Scale yy <br /> _T Ground Water Monitoring Well <br /> 0 15 30 60 Feet <br /> !.� 1 Inch=30 Feet Ground water elevation contour in feet <br /> Oreferenced to mean sea level(MSL) <br /> Arrows indicate approximate ground <br /> Q water flow direction <br /> E� <br /> W ` \ <br /> 5665 Ground water elevation in feet above MSL <br /> \ (2 0) Benzene concentration in ppb <br /> `\ ND=Not Detected <br /> ` Notes Monitoring performed 10-Jun-97 <br /> O \ Approximate hydraulic gradient=0 003 <br /> Station <br /> Building \ <br /> - N <br /> Canopy and \ <br /> Dispenser island ` <br /> MW-3 <br /> '58 03 <br /> (0 555) <br /> - - \ <br /> MW-2 <br /> 5795 <br /> Existing USTs F er UST (ND) <br /> -� <br /> Lac .on <br /> O Canopy and <br /> ` Dispenser IslandsC ` <br /> - MW-1- - ,sem <br /> 58 06�0� <br /> (ND) - — <br /> HAMMER LANE <br /> Base map from Fugro map of 6-Feb-96 <br /> LATE GROUND WATER CONTOUR/BENZENE CONCENTRATION MAP <br /> Shell Service Station e v�,�rOs <br /> 2 7910 Lower Sacramento Road 97377 <br /> Stockton, California <br /> Drawn By JWN Date 9-Jul-97 Approved By Date&A,1 <br />