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30-Mar-00 <br /> EXPLANATION <br /> ♦ Groundwater Monitoring Well <br /> Backfill Well <br /> ` Groundwater elevation contour in feet <br /> referenced to mean sea level (MSL) <br /> Arrows indicate approximate groundwater <br /> flow direction <br /> 8837 Groundwater elevation in feet above MSL <br /> NM =Not measured —N— <br /> (<1 00) Benzene concentration in ppb <br /> MTBE(by EPA Method 8020) <br /> (229) concentration in ppb <br /> <x=Not detected at detection limit x <br /> Approximate hydraulic gradient=0 002 <br /> - ---- -- <br /> MW-3A '3p 2S 88 221 <br /> 88.36 IN Z *(<100) <br /> (<0 500) (49,900) <br /> (3 23) \_ <br /> BF-1 % A <br /> (<500) > <br /> i 1\122,000 a <br /> 7 <br /> b G� Existing <br /> Carwash sruel USTs U <br /> Canopy and <br /> Dispenser Islands_ F-+ <br /> ❑ <br /> i <br /> 1 - MW-2A <br /> ♦ 88.371 <br /> (<100) <br /> 12291 <br /> Former UST <br /> Location <br /> I <br /> ON Mp <br /> 205 <br /> P _INTERSTATE ROUTE NO <br /> Scale <br /> FIGURE <br /> 0 15 30 BO <br /> -1 1 Inch=30 Feet <br /> Banc Map Fugra of 4!5195 21 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 3725 Tracy Boulevard G Chemical Concentration Map <br /> Tracy, California <br /> Incident No 98996222 C A M B R I A February 18, 2000 <br />