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11 Jul 00 <br /> EXPLANATION <br /> Groundwater Monitoring Well <br /> �/. Groundwater elevation contour in feet <br /> referenced to site datum Arrows indicate <br /> Q! approximate groundwater flow direction <br /> 66,77 Groundwater elevation in feet referenced <br /> W \ to site datum <br /> (0 551) Benzene concentration in ppb <br /> G� \ (<2 50) MTBE(by EPA Method 8020) <br /> concentration in ppb <br /> \ <x=Not detected at detection limit x <br /> w \ Approximate hydraulic gradient=0 03 <br /> jk <br /> Station \ <br /> �] Building <br /> Canopy and <br /> Dispenser Island \ <br /> I <br /> iVIW3 0 <br /> 67.69 <br /> (<0 500)+ <br /> (43 0) <br /> Id --Existing USTs MW-2 <br /> ~ +y67.64 <br /> (<0 500) <br /> Ca (<2 50) <br /> DiIslFormer UST <br /> 0� Location <br /> it <br /> - --------- ------- MW-1 <br /> 6677 ------ ---- <br /> (0.551) <br /> (<2 50, ! —N— <br /> HAMMER LANE <br /> Scale <br /> FIGURE <br /> 0 15 30 60 <br /> 1 Inch=30 Feet <br /> Base map from Fugro map of 6 Feb 96 <br /> 2-.j <br /> ISShell-branded Service Station Groundwater Contour/ <br /> 7910 Lower Sacramento Road G Chemical Concentra <br /> Stockton, California tion Map <br /> Incident No 98996180 C A M B R I A <br /> May 18, 2000 <br />