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11 Jul 01 <br /> ' EXPLAN ON <br /> Groundwater monitoring well <br /> Backfill well <br /> O Sump <br /> Abandoned water well <br /> R Groundwater elevation contour in feet referenced to <br /> /y mean sea level (ft msl) Arrows indicate approximate <br /> groundwater flow direction <br /> mw-3A—Well designation <br /> 87 78—Groundwater elevation,ft ms] <br /> 195 Benzene concentrations in groundwater in parts per <br /> (36 3)"�billion(ppb) <br /> MTBE concentrations in groundwater in ppb by EPA <br /> Method 8260 <br /> NA Not Available <br /> <x Not detected at detection limit x MW-IA,_ <br /> Approximate hydraulic gradient=0 0007 8767 <br /> <20 <br /> - - - - - � - - - - - - - - - - (7,800) — <br /> Abandoned <br /> 8761 <br /> -------------- -------- Water Well <br /> 87 61 ' <br /> <0 50 A <br /> - - GG <br /> NA �� y <br /> <50 �' W <br /> (33,000) <br /> a <br /> d1> O <br /> Carwash <br /> Canopy and <br /> Dispenser Islands Existing <br /> Fuel USTs <br /> O r - - MW-2A <br /> 8763 <br /> ` <0 50 <br /> (170) <br /> Former UST <br /> Location <br /> ON RAMp . INTERSTATE ROUTE NO-205 <br /> FIGURE <br /> Scale(ft) <br /> M 0 15 30 60 <br /> ; 2 <br /> Base Map Fugro of 415195 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 3725 Tracy Boulevard G Chemical Concentration Map <br /> Tracy, California <br /> C A M B R I A ,lune 5, 2001 <br />