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r <br /> ROSE MARIE LANE <br /> \ Planter <br /> MW-1 <br /> \ -7 82 <br /> Waste -7.80— (ND) <br /> ---- Oil (ND) <br /> Tank <br /> a <br /> Air& y <br /> Water 4 <br /> -7 ----- ----------- <br /> Z <br /> Fuel USTs <br /> ------------------- <br /> ------------------- 09 <br /> Station ----- ------- - <br /> Building , <br /> -7.60, ' <br /> F � <br /> Canopy and <br /> MW-2 Dispenser Exxon <br /> -756 , Islands Monitoring <br /> (ND) , Well <br /> N (ND) �7 5 ' <br /> 11 <br /> - - - - - - - - - - - - - - <br /> - Vent Lines - - - - - - _ - - -W-4 <br /> vEW-2 -749 <br /> - - ------NA-----__-- (ND) <br /> --- ---------------------- ---- <br /> (ND) -vEW-1 (4 6) <br /> ($0) NA <br /> (ND) *MW-3 <br /> (l3) -754 <br /> EXPLANATION (ND) <br /> Ground Water Monitoring Well - - (ND) <br /> Vapor Extraction Well Former USTs <br /> Ground water elevation contour in feet referenced Location <br /> to mean sea level (MSL) Arrows indicate <br /> approximate ground water flow direction <br /> -749 Ground water elevation in feet Scale <br /> (ND) Benzene concentration in ppb <br /> ND=Not Detected 0 10 20 40 Feet <br /> (4 6) MTBE concentration in ppb I Inch=20 Feet <br /> Note Monitoring performed on 12-Aug-98 <br /> Approximate Hydraulic Gradient=0 004 Base map from Fugro map of 12 Nov 1992 <br /> PLATE GROUND WATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> Shell-branded Service Station CAMBRIA <br /> 2 4445 Pershing Avenue 240-0837 <br /> Stockton, California <br /> Drawn by ]N Date 07-Oct-98 Approved By Date <br />