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EXPLANATION <br /> Groundwater Monitoring Well <br /> ® Groundwater Recovery Well <br /> �} Soil Vapor Extraction Well <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level (MSL) <br /> Arrows indicate approximate direction of <br /> ground water flow <br /> 7696 Groundwater elevation in feet above MSL <br /> (ND) Benzene concentration in ppb <br /> (171) MTBE concentration in ppb <br /> ND=Not Detected <br /> <X=Not detected at detection limit X <br /> Notes Monitoring and sampling performed on <br /> Approximate Location of CHANNEL STREET 14-Apr-99 <br /> Former Tank Excavation Approximate hydraulic gradient=0 01 <br /> VEW-3 <br /> Sidewalk VEW-2 MW-2 (109) <br /> (ND) 77 70 (171) <br /> _ _(425) (ND) 1RW-1M -4 <br /> *39 3) - - 77.42 + 77 30 <br /> (ND) (ND) <br /> 77 74 (c5 00) (<5 00) <br /> 7 1 (ND) /� <br /> (10 7) /1 <br /> VEN<1 ' <br /> (149) Canopy .2 <br /> Mw-5 `�(I32)----- - MW-11 7696 C) <br /> 7848 <br /> (<5.00) .(0.60) (3ND) <br /> (589) <br /> (944) g <br /> Building VEW- <br /> (2 22) <br /> (139) <br /> Former Waste Channel Bulkhead <br /> Oil Tank (Below) <br /> ; <br /> Concrete Deck Parking Area <br /> Scale <br /> 0 15 30 60 Feet <br /> I Inch=30 Feet <br /> Base map from Fugro map of 12 13-95 <br /> PLATE GROUNDWATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> C M Weber Enterprises Property CAMBRIA <br /> 2 141 North El Dorado Street 241-0821 <br /> Stockton, California <br /> Drawn By LS Date 4-Jun-99 Approved By Date <br />