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A <br /> CENTRAL AVENUE EXPLANATION <br /> Groundwater monitoring well <br /> 9999 Groundwater elevation In feet <br /> referenced to dean Sea Level <br /> I `1� Former 1 / <br /> Underg <br /> ' <br /> Storage roundTanks 1Former Underground /9g 9g dashedGroundwwheere elevation contour, <br /> inferred <br /> Storage Tanks <br /> { (w U-4 <br /> I Concrete r I 3939 <br /> Island I a <br /> to <br /> r <br /> Im I Canopy " Former �' { <br /> p, Station r W Approximate groundwater <br /> Budding U-2 WW flow direction at a <br /> 39 62r <br /> 39441 lE— gradient of 0004 Ft/Ft <br /> *U-81 1 I N <br /> Former <br /> Waste oil <br /> { Tank f { <br /> 1 Former/ I <br /> Dispenser <br /> { i Island <br /> I I I Z <br /> I <br /> Asphalt <br /> { Patch I <br /> 0 20 <br /> L L — — — — — Approximate Property Boundary <br /> 5ouuca F9" IlWdW From Dr" Now*d Scole In Feet <br /> �r NP05 Suwces, Inc <br /> Getter - Ryon Inc. POTENTIOMETRIC MAP FIGURE <br /> Former Unocal Service Station No. 0123 <br /> 6747 sierra Ct.. Suite J (925) 551-7555 1034 Central Avenue <br /> Dublin. CA 94568 Trac California <br /> JDB NUMBER REVIEWED BY DATE REVISED DATE <br /> 280047 June 22 1998 <br />