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V <br /> CENTRAL AVENUE EXPLANATION <br /> I Groundwater monitoring well <br /> f <br /> 9999 Groundwater elevation in feet <br /> 3893 referenced to Mean Sea Level <br /> Former I I <br /> (MSL) <br /> Underground , / <br /> ' Storage Tanks Former 9 9g Groundwater elevation contour, <br /> dereTanks <br /> /g dashed where Inferred <br /> Storage g <br /> 11 i 1 <br /> Concrete 1U-4 <br /> I Island I 38 91 <br /> �+ I a <br /> I i <br /> Canopy ' <br /> I Form 38 981 ' <br /> Er i StatlOn ` <br /> Buildin {U-2 W Approximate groundwater <br /> g c o 1 1 I Flow direction at a <br /> F gradient of 0 004 Ft/Ft <br /> 3 U-3 0 I r N <br /> 1 13916 I _ <br /> Former <br /> Waste od 1 <br /> i Tank 1 <br /> 1 I Former <br /> Dispenser <br /> i Island I l <br /> I Z <br /> i Asphalt <br /> Patch , <br /> I 3 <br /> Approximate Property Boundary 0 20 <br /> Source RgLn Hodrried From Oramag PrmWed <br /> Byaaos Servo= Inc Scale In Feet <br /> Ge Mar - Ryan Inc, POTENTIOMETRIC MAP FIGURE <br /> Former Unocal Service Station No 0123 <br /> 6747 Sierro Ct, Suite J (925) 551-7555 1034 Central Avenue <br /> DuErn, CA 94568 Trac , California <br /> JOB NUMBER REVIEWED BY -ATE REVISED DATE <br /> 280047 Setember 28 1998 <br />