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22-JW-05 <br /> EXPLANATION <br /> + Monitoring Well <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level(ft ms]) <br /> _N_ ! Arrows indicate approximate groundwater <br /> flow direction <br /> 881 Groundwater elevation in ft nisi <br /> Scale(M} (0•70) Benzene concentration in parts per billion <br /> (ppb) <br /> 0 15 30 60 (<10 50) MTBE concentration in ppb <br /> NA Not analyzed <br /> VVEST YOSEMITE AVEUNE <x Not detected at reporting limit x <br /> MW-3 I Approximate hydraulic gradient 0 015 <br /> 10.26 <br /> (1.5) Driveway Sidewalk <br /> NA)--5-Drai <br /> PlanterNib- 106 -4 Planter <br /> 10.71 <br /> (<0 50) Sidewalk <br /> Sidewalk (NA) <br /> Former <br /> _ <br /> 'kDispenser Islands <br /> Mw-1 <br /> 10 62 Retail <br /> (51) <br /> (NA) <br /> "4 . ____ Former Underground <br /> rn - / ` Retail Storage Tanks r <br /> --- -� <br /> A Former - ,\ <br /> OPayless Shoe <br /> Source -- <br /> Z -- _ <br /> ' � /'\♦ \ <br /> MW 5 <br /> - 10.47 <br /> ( 0.50) • \�� <br /> Sidewalk Retail <br /> H <br /> 3_ <br /> MW-2 Concrete Pad1070 <br /> v <0 50 Former UST <br /> { ) <br /> A (NA) Retail <br /> Trash L FIGURE <br /> 0 2 <br /> r <br /> P60rmer Shell Service Station © Groundwater Contour/ <br /> West Yosemite Avenue Chemical Concentration Map <br /> Manteca, California C A M B R I A <br /> June 14,2005 <br />