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EXPLANATION <br /> -� Ground Water Monitoring Well <br /> 9 Ground Water Recovery Well <br /> Soil Vapor Extraction Well <br /> / Ground water elevation contour in feet <br /> referenced to mean sea level (MSL). <br /> / Arrows indicate approximate direction of <br /> ground water flow. <br /> 73.85 Ground water elevation in feet above MSL <br /> (0.81) Benzene concentration in ppb <br /> ND=Not Detected <br /> Notes:Monitoring performed on 02-Apr-97. <br /> Approximate Location of— <br /> CHANNEL STREET Approximate Hydraulic Gradient=0.01. <br /> Former Tank Excavation <br /> /// RW-1 <br /> Sidewalk 73.55 <br /> MW-Z VEW-3 '['�6 S (6.3)71 <br /> _ j73.72—(ND+ MW4 <br /> > 1.1,- (0.76) ` 73.38 <br /> - --W MW-3 (ND) <br /> VEW-2 73.75 <br /> (ND) ,Concrete Pad. ND i - <br /> ( ) <br /> VEW-1 ^� <br /> ,-#49 Canop S 73 0 <br /> (ND) �(ND) <br /> - � -� O <br /> o M1W-1 Q <br /> 73.85 <br /> (0.81) _ o N <br /> Building (ND) �- <br /> v <br /> --- <br /> Z <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. <br /> 1 Inch=30 Feet <br /> PLATE GROUND WATER CONTOUR/BENZENE CONCENTRATION MAP • <br /> 2 C.M. Weber Enterprises Property en viros <br /> 141 North El Dorado Street 97369 <br /> Stockton, California <br /> Drawn By: MED Date: 16-May-97 Approved By Date <br />