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I <br /> EXPLANATION <br /> Scale <br /> Ground Water Monitoring Well <br /> 0 15 30 60 Feet <br /> Q I Inch=30 Feet Ground water elevation contour in feet <br /> O T referenced to mean sea level (MSL) <br /> a + \ Arrows indicate approximate ground <br /> 1 water flow direction <br /> J <br /> W \ , <br /> 5665 Ground water elevation in feet above MSL <br /> V <br /> (2 0) Benzene concentration in ppb <br /> I \ ND=Not Detected <br /> W <br /> Notes Monitoring performed 6-Feb-97 <br /> O \ Approximate hydraulic gradient =0 005 <br /> Station <br /> Building \ <br /> N <br /> Canopy and <br /> i <br /> I Dispenser Island ` <br /> ' <br /> MW-3 <br /> <56 93 <br /> (ND) <br /> - <br /> 569 MW-2 <br /> (--56 9- 56 82 <br /> Existing USTs Former UST (ND) <br /> i, Location <br /> 5619 <br /> � \ <br /> Canopy and 56 S <br /> Dispenser Islands t <br /> i <br /> \ o 56 7 - 567 \ <br /> i <br /> - - - - - - MW-I <br /> - - - - - _ � <br /> 5665 <br /> HAMMER LANE <br /> Base map from Fugro map of 6-Feb-96 <br /> dr2y <br /> GROUND WATER CONTOUR/BENZENE CONCENTRATION MAP <br /> Shell Service Station envlYos <br /> 7910 Lower Sacramento Road 97377 <br /> Stockton, California <br /> Drawn By MED Date 1-Apr-97 Approved By ate <br />