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3 <br /> EXPLANATION <br /> ilk Ground Water Monitoring Well <br /> & Ground Water Recovery Well <br /> Soil Vapor Extraction Well <br /> Ground water elevation contour in feet <br /> referenced to mean sea level (MSL) <br /> 7 Arrows indicate approximate direction of <br /> ground water flow <br /> 7508 Ground water elevation in feet above MSL <br /> (ND) Benzene concentration in ppb <br /> ND=Not Detected <br /> NM No TOC Elevation Data <br /> Notes Monitoring performed on 31-Jan-97 <br /> Approximate Location of CHANNEL STREET Approximate Hydraulic Gradient=0 004 <br /> Former Tank Excavation <br /> --RW-1 <br /> SidewalkA 75 08 <br /> _ - - - — —MW-2 VEW-3 --75� - !s (ND)-�I <br /> 7545 -NM MW-4 <br /> * (ND)- -- 7505 <br /> t YjNiW-3 1 <br /> VEW-2 � --- {ND} <br /> 5 44 <br /> ND) Concrete Pad i 1(ND) L L <br /> VEW i—_ RW-2 C <br /> MW-5 NM Canopy <br />. <br /> 7646 06 <br /> +(ND) a 75 D) <br /> (ND) i I kn n {NIn <br /> D) <br /> MW-1 <br /> 7547 <br /> (ND) f <br /> Building NM -4 J v <br /> (ND) c <br /> Former Waste Channel Bulkhead <br /> Oil Tank (Below) <br /> Concrete Deck Parking Area <br /> Scale <br /> 0 15 30 60 Feet <br /> Base map from Fugro map of 12-13-95 1 Inch=30 Feet <br /> PLATE GROUND WATER CONTOUR/BENZENE CONCENTRATION MAP • <br /> C M Weber Enterprises Property enviros <br /> 2 141 North El Dorado Street 97369 <br /> Stockton, California <br /> Drawn By MED Date 26-Feb-97 Approved By 6WDate <br />