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11 Apr 03 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> fa Groundwater elevation contour in feet <br /> Oreferenced to mean sea level(ft msl) <br /> �! Arrows indicate approximate <br /> groundwater flow direction <br /> W -21.1.6 Groundwater elevation in ft mst <br /> (<0.50) Benzene concentration in parts per billion <br /> (ppb) <br /> (<5 0) MTBE concentration in ppb by EPA <br /> ` Method 8260 <br /> COO <br /> \� <x Not detected at reporting limit x <br /> \ Approximate hydraulic gradient=0 002 <br /> O <br /> !.� Dispenser Island <br /> (typ) . <br /> Station ` <br /> Building \ <br /> I i <br /> I a" <br /> MW-3 N <br /> -23.30-. , <br /> (0 50) a w _ MW-2 <br /> (<5 0) � �' \ -23.38 <br /> Existing •°` (<0.50) <br /> 4 USTs '(CS 0) <br /> Planter <br /> Former UST <br /> Location <br /> -- - - - - _ - <br /> MW-l+ <br /> -2330— <br /> - - <br /> (<0 5)0 ...-- - -N- <br /> (13 <br /> ioo 7-PAF <br /> HAMMER LANE <br /> Scale (ft) <br /> FIGURE <br /> 2 <br /> 0 15 30 60 <br /> N <br /> CO Sass map from Fugro map of 6 Feb-96 <br /> hell-branded Service Station Groundwater Contour/ <br /> 7910 Lower Sacramento Road Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A February 21, 2003 <br />