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EXPLANATION <br /> + 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 /> Arrows indicate approximate direction of <br /> ground water flow <br /> 7367 Ground water elevation in feet above MSL <br /> (ND) Benzene concentration in ppb <br /> (73) 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 12-Jan-98 and 13-Jan-98 unless otherwise indicated <br /> Former Tank Excavation Approximate hydraulic gradient= 0 007 <br /> Sidewalk MW-2 VEW-3 <br /> VEW-2 —73.71 (2 5) RW-1 <br /> (41D}) (ND) (8 9) 73339) MW-4 <br /> 7�0 (NA) F MW-3 ( 73 32 <br /> a 73 72 (ND) (ND) <br /> ;t ncrete Pad (ND) —tr (ND) <br /> `SO (NA) W <br /> VEW-1 RW-2 Q,! <br /> (2 0) Canopy G 73 31 E- <br /> MW-5 ° - (84) (ND) <br /> 74 70 - - - (ND) F� <br /> MW-1 O <br /> (670) 7367 <br /> (ND) C) <br /> Building {73} {1W4 <br /> rA <br /> (2 6) <br /> Former Waste Channel Bulkhead, <br /> Oil Tank (Below) <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 GROUND WATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> C M Weber Enterprises Property �08�� <br /> 2 141 North El Dorado Street zoo-oszl <br /> Stockton, California <br /> Drawn By MRM Date 12-Mar-98 Approved By �. Date 3-15 <br />