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EXPLANATION <br /> Scale <br /> f Ground Water Monitoring Well <br /> 0 15 30 60 Feet <br /> A 1 Inch=30 Feet Ground water elevation contour in feet <br /> referenced to mean sea level (MSL) <br /> 0 \ Arrows indicate approximate ground <br /> water flow direction <br /> 0 <br /> 6316 Ground water elevation in feet above site <br /> W \ datum <br /> \ (0 67) Benzene concentration in ppb <br /> U \ ND=Not Detected <br /> (2 S) MTBE concentration in ppb <br /> a Notes Monitoring performed 10-Nov-98 <br /> 3 Approximate hydraulic gradient=0 004 <br /> a <br /> Station <br /> Building N <br /> Canopy and \ <br /> Dispenser Island <br /> MW-3 <br /> 6332 <br /> (ND) <br /> i ------------ 1 (ND) <br /> Existing USTsi L MW-2 <br /> f 16 <br /> M m (0 Former UST jjj���►►► {0 67) <br /> Canopy an <br /> 1 Dispenser Islands �c Location (ND) <br /> �I \ <br /> MW-1- <br /> 6324 <br /> W-16324 <br /> (36) <br /> HAMMER LANE <br /> Base map from Fugro map of 6-Feb-96 <br /> PLATE GROUND WATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> Shell-branded Service Station C AMBRIA <br /> 2 7910 Lower Sacramento Road 240-0832 <br /> Stockton, California <br /> Drawn By MDP Date 07-Jan-99 Approved By n.al Date1 -�f <br />