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ROSE MARIE LANE <br /> Planter <br /> *MW-1 <br /> Waste -729 <br /> Oil (0 688) <br /> Tank (ND) <br /> -72-- Z <br /> Air& <br /> Water 1 <br /> Fuel USTs ' <br /> Station <br /> ------------------- ------ <br /> Building <br /> Canopy and <br /> Dispenser ' <br /> Islands t <br /> MW-2 i Exxon <br /> -699 \ Monitoring <br /> (ND) \ Well <br /> N (175) \----- <br /> --------- ----76) <br /> Vent Lines - MW-4 <br /> -696 <br /> = v`"" 2 NDNA ( ) <br /> (ND) (ND) <br /> (ND) VEW-NA *MV(0 73 -704 <br /> EXPLANATION (ND) (ND} <br /> Groundwater Monitoring Well --—--— (ND) <br /> Vapor Extraction Well Former USTs <br /> Groundwater elevation contour in feet referenced — Location <br /> to mean sea level(MSL) Arrows indicate <br /> approximate groundwater flow direction <br /> -696 Ground water elevation in feet Scale <br /> (ND) Benzene concentration in ppb <br /> ND=Not Detected 0 10 20 40 Feet <br /> (ND) MTBE concentration in ppb 1 Inch=20 Feet <br /> Note Monitoring performed on 28-May-99 <br /> Approximate Hydraulic Gradient= 0 004-0 01 sa.�map from i-q.,o mar or 12 Nov 1992 <br /> PLATE GROUNDWATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> Shell-branded Service Station CAMBRIA <br /> 2 4445 Pershing Avenue 241-0837 <br /> 4 Stockton, California <br /> Drawn by LS Date 01-Jul-99 Approved By Date <br />