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06-Feb-01 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> Backfill well <br /> O Sump <br /> Groundwater elevation contour in feet referenced to <br /> mean sea level(ft ms]) Arrows indicate approximate <br /> / groundwater flow direction <br /> MW-3A—Well designation <br /> $7 78—Groundwater elevation, ft msl <br /> 195 `Benzene concentrations in groundwater in parts per <br /> (36 3)\billion (ppb) <br /> MTBE concentrations in groundwater in ppb by EPA <br /> Method 8020, results in parentheses are analyzed by <br /> EPA Method 8260 –N– <br /> NA Not Available <br /> <x Not detected at detection limit x <br /> MW8762 <br /> Approximate hydraulic. gradient=0 02 <br /> - <br /> -------------—--------- ;------------------- 356 - <br /> (69,300) <br /> MW-3A \ <br /> 8778 <br /> 1 95 <br /> 363 Nil � A <br /> BF-1� a <br /> �( NA <br /> 50 <br /> (64,700) W <br /> ` 1p j> <br /> Carwash U <br /> Canopy and \ <br /> Dispenser Islands_ 1 .0 <br /> ' Existing <br /> -• Fuel USTs > <br /> s <br /> 0 <br /> SUMP } 22 <br /> MW7NA <br /> <0 500 2 33 <br /> <2 50 (237) <br /> Former UST <br /> Location <br /> Mp - 1NTERS`r'ATE ROUTE NO.205 <br /> ON RA <br /> FIGURE <br /> Scale (ft) <br /> Q 15 30 60 Baw Map Fu€ro.x 4/5/95 <br /> 2- <br /> Shell-branded Service Station Groundwater Contour/ <br /> 3725 Tracy Boulevard © Chemical Concentration Map <br /> Tracy, California <br /> C A M B R I A October 30, 2000 <br />