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EXPLANATION <br /> ♦ Groundwater monitoring well <br /> 9999 Groundwater elevation in feet <br /> referenced to Dean Sea Level <br /> (MSL) <br /> CENTRAL AVENUE 99gg/ Groundwater elevation contour, <br /> Former / dashed where inferred <br /> Underground <br /> Storage <br /> Tanks <br /> Former <br /> Underground <br /> U-1 Storage <br /> Tanks /fO44 Y <br /> Concrete J V\J \ 38681 <br /> Island �` ' 1 �\ <br /> l�Canopy D 1 ♦U-400 <br /> Former -.1 I 38 66 ` Approximate groundwater <br /> o Station 1 flow direction at a <br /> ►Hells j , Building ; I 1 U-d gradient of 0003 to 0004 Ft/Ft <br /> Fargo - _ __ 3891 38 37 <br /> Building #U-5 �� ,*U-8 U-2 138 72 WCO <br /> 139 11 oWC <br /> Former I H <br /> W/o <br /> F- i Tank Former I 2 Furniture <br /> Dispenser i r Store <br /> Island <br /> L i — — — — — _ r <br /> I <br /> Approximate Property Boundary <br /> Asphalt <br /> Patch 0 40 <br /> Sour= Fire YoMW From Dra " Provided Scole in feet <br /> By MPDS samm ine <br /> POTENTIOMETRIC MAP FIGURE <br /> Gettler - Ryan Inc. Former Unocal Service Station No. 0123 <br /> 6747 Sierra CL, Suite J (925) 551-7555 1034 Central Avenue 1 <br /> Dublin, CA 94568 Tracx,, California <br /> Job NUMSER REVIEWED BY DATE REVISED DATE <br /> 280047 Se tember 9 1999 <br />