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21 Apr 04 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> ® Product dispenser number <br /> A / Groundwater elevation contour in feet <br /> /y referenced to mean sea level (ft msl) <br /> !�! Arrows indicate approximate <br /> Ogroundwater flow direction <br /> W -2526 Groundwater elevation in ft msl <br /> r (<0.50) Benzene concentration in parts per billion <br /> (ppb) <br /> ` (2 3) MTBE concentration in ppb by EPA <br /> Method 8260 <br /> W <x Not detected at reporting limit x <br /> ,3 Approximate hydraulic gradient= 0 002 <br /> ODispenser Island \ <br /> (typ) <br /> Station ` <br /> O © Building \ <br /> a� <br /> -2516 <br /> (<0 50) <br /> (10) <br /> Existing ® \ Mph <br /> USTs <br /> i `MW-2 <br /> 2526 <br /> O (<0 50) <br /> (2 3) <br /> Planter <br /> \ J Former UST <br /> Location <br /> -25 26— - - - - - <br /> __L (<0.50) <br /> (0 93) -N- <br /> HAMMIER <br /> NHAMMER LANE <br /> Scale(ft) <br /> FIGURE <br /> 0 15 30 60 <br /> N <br /> Base map from Fugro mop of&Fe696 2- 0 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 7910 Lower Sacramento Road G Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A February 23, 2004 <br />