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17-Sep 03 <br /> EXPLANATION <br /> Groundwater monitoring welt <br /> ® Product dispenser number <br /> Groundwater elevation contour in feet <br /> Oreferenced to mean sea level (ft msl) <br /> y. Arrows indicate approximate <br /> groundwater flow direction <br /> W <br /> -2247 Groundwater elevation in ft ms] <br /> (<0.50) Benzene concentration in parts per billion <br /> (ppb) <br /> ` (<5 0) MTBE concentration in ppb by EPA <br /> ,q!l Method 8260 <br /> \\a cx Not detected at reporting limit x <br /> Approximate hydraulic gradient=0 007 <br /> Dispenser Island \ <br /> (typ) \ <br /> Station ` <br /> Q ® Building \ <br /> a- <br /> MW-3 <br /> - - -28 30-4-.- � <br /> I I (<0.50) MW-2 <br /> (l 9) \ <br /> 2832 <br /> Existing ® (<0.50)USTs (<O <br /> � '(<0 50) <br /> Planter <br /> o <br /> O 28l Former UST ` <br /> MW-1* Location <br /> - - _ -28.02 ' - - - - - � <br /> (<0.50) <br /> (4 2) -N- <br /> HAMMIER LANE <br /> Scale(ft) <br /> FIGURE <br /> 0 15 30 60 2 <br /> N <br /> Bm map from Fugm map of&Feb96 <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 August 14, 2003 <br />