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04 Nov 04 <br /> EXPLANATION <br /> ® Direct-Push Soil Boring <br /> Monitoring Well <br /> —N-- <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level(ft ms]) <br /> Arrows indicate approximate groundwater <br /> flow direction <br /> Scale(ft) 522 Groundwater elevation in ft msl <br /> 0 15 30 60 (4 0) Benzene concentration in parts per billion <br /> (ppb) <br /> (<0 50) MTBE concentration in ppb <br /> WEST YOSEMITE AVEUNE <x Not detected at reporting limit x <br /> �00 Approximate hydraulic gradient= 0 003 <br /> ?� MW-3 <br /> .33 <br /> (<0 50) Driveway Sidewalk <br /> <0 50) 15 V <br /> Drain Mw-4 �� <br /> * ' Planter <br /> S 24 %A <br /> Planter 5 32 <br /> (<0 50) Sidewalk <br /> Sidewalk-1 (<0 50) <br /> 522 -- /--- <br /> (4.0) � _ I ___ J Retail <br /> 16 (<0 50) - <br /> Former <br /> tspenser Islands <br /> Former Underground <br /> cn N i Retail Storage Tanks <br /> A Former <br /> Payless Shoe <br /> 0 Source 4 - <br /> I I � <br /> ' NI[W-5 <br /> �*''► <br /> 533 <br /> (<0 50) o ! <br /> / (<0 50) <br /> Sidewalk ,yam Retail <br /> O y � <br /> H <br /> MW-2 �� Concrete Pad <br /> 3 522 <br /> (<0 50) Retail <br /> A (<0 50) <br /> Trash FIGURE <br /> 2 <br /> 0 <br /> Former Shell Service Station © Groundwater Contour/ <br /> 1160 West Yosemite Avenue Chemical Concentration Map <br /> Manteca, California C A M B R I A <br /> September 28, 2004 <br />