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RCLd MARIE LANE <br /> Planter <br /> *MW-1 <br /> -6.49 <br /> Waste <br /> ------: Oil '6.45 � (ND} <br /> ` Tank �(ND) <br /> W <br /> z <br /> ----------------- <br /> Air& � <br /> Water Q <br /> -6.3S Fuel USTsf Z <br /> Station - - ----------------- <br /> - - - - - - - - - - - - - - - - - - <br /> Building <br /> 2 <br /> i <br /> _ Canopy and a �- <br /> MW-Z ' _ Dispenser , Exxon <br /> -6.24 ,6�s, Islands Monitoring <br /> (ND) , Well <br /> jV (ND) - _ "'MW-4 ' <br /> - Vent Lines - - - - - - - ` (ND) <br /> .22 <br /> V>G -2 <br /> VE (NA � <br /> (ND) <br /> (5.6) W-1 <br /> NA �-MW'-3 <br /> {0.69) -6,27 <br /> EXPLANATION _ _ (2-1) (ND) <br /> Ground Water Monitoring Well \ (3.5) <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 /> -6.22 Ground water elevation in feet Scale <br /> (ND) Benzene concentration in ppb <br /> ND=Not Detected 0 10 20 40 Feet <br /> (3.5) MTBE concentration in ppb I inch=20 Feet <br /> Note: Monitoring performed on 20-May-98. <br /> Approximate Hydraulic Gradient=0.004 Base map from Fugro map of 12-Nov-1992. <br /> PLATE GROUND WATER CONTOUR/CHEMICAL CONCENTRATION MAP A D <br /> Shell-branded Service Station CriMB�A <br /> 2 4445 Pershing Avenue 240-0837 <br /> Stockton, California <br /> Drawn by : MRM Date: 09-Jul-98 Approved By ^Date <br />