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08-Jul-00 <br /> EXPLANATION <br /> Groundwater Monitoring Well <br /> �r Backfill Well <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level (MSL) <br /> Arrows indicate approximate groundwater <br /> flow direction <br /> 8790 Groundwater elevation in feet above MSL <br /> NM=Not measured —N— <br /> (<0 500) Benzene concentration in ppb <br /> (9 21) MTBE(by EPA Method 8020) <br /> concentration in ppb <br /> <x=Not detected at detection limit x <br /> Approximate hydraulic gradient=0 002 <br /> ---------------------------- CP <br /> .X -- — --�j-------�j — MW-1A <br /> MW-3A rJ� dp 87 73 <br /> 8790 �` <br /> \ ` \ (35,400) <br /> (9 2l) <br /> NMI ` <br /> A <br /> \ (240) <br /> \ (.W,000) W <br /> a <br /> d Existing <br /> Carwash °o Fuel USTs U <br /> Canopy and <br /> Dispenser Islands `\ ❑ E-+ <br /> - MW-2A <br /> 87801 <br /> (c0 500) <br /> (682) <br /> Former UST <br /> Locate on <br /> N RAMP ->INTERSTATE ROUTE NO.205 <br /> O <br /> Scale <br /> FIGURE <br /> 0 15 30 60 <br /> 1 Inch=30 Feet 2 <br /> Base Map Fugra of 415/95 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 3725 Tracy Boulevard © Chemical Concentration Map <br /> Tracy, California <br /> Incident No 98996222 C A M B R I A May 1, 2000 <br />