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EXPLANATION <br /> Scale y <br /> 0 15 30 60 Feet T Groundwater Monitoring Well <br /> Q I Inch=30 Feet <br /> Q, 6263 Groundwater elevation in feet referenced <br /> O to site datum <br /> Groundwater elevation contour in feet <br /> referenced to site datum Arrows indicate <br /> / approximate groundwater flow direction <br /> (ND) Benzene concentration in ppb <br /> Q' \ ND=Not Detected <br /> (ND) MTBE concentration in ppb <br /> Q Notes Monitoring performed 27-Aug-99 <br /> Approximate hydraulic gradient=0 006 <br /> Station <br /> /] Building <br /> Canopy and <br /> Dispenser Island <br /> i <br /> MW-3 er <br /> 62 33* e <br /> ---(ND) w <br /> ' <br /> } Existing USTs (60 7) �o \ MW-2 <br /> r t \b2 63 <br /> Canopy and r ! �~�1 ( <br /> O Dispenser Islandsi (ND) <br /> Former UST <br /> r Location \ <br /> I <br /> — — ----- --- ---- TMW-1 <br /> =-- 62 41f— — — <br /> (ND) <br /> ND) <br /> HAMMER LANE <br /> Base map from Fugro map of 6-Feb-96 <br /> FIGURE GROUNDWATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> Shell-branded Service Station CAMBRIA <br /> 2 7910 Lower Sacramento Road 241-0832 <br /> Stockton, California <br /> Drawn By AKC Date I I-Qct-99 Approved By Date 1Q i3 <br />