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ROSE MARIE LANE <br /> Planter <br /> ` -i♦MW 1 <br /> -740 <br /> Waste (ND) <br /> oilND <br /> Tank -735 ( ) <br /> w <br /> 0z <br /> - -- ----- ----- w <br /> Air& <br /> Water d <br /> '7 <br /> 2S USTs <br /> , � W <br /> a <br /> Station <br /> Building i <br /> -715 Canopy and <br /> i Dispenser <br /> AIVIslands <br /> MW-2 Exxon <br /> a -713 ,SIS Monitoring <br /> (ND) ; Well <br /> N (ND) <br /> - Vent Lines - - - - -- - - MW-4 <br /> - vE -2 -712 <br /> _ __ _ __ ____=--==NA== ___ _ -72S (ND) <br /> - (ND) (ND) <br /> (ND) VEW-i 1 <br /> NA -!-M w-3 <br /> (ND) -7.29 <br /> EXPLANATION (2 9) (ND) <br /> �- Ground Water Monitoring Well - - (ND) <br /> Vapor Extraction Well _ Former USTs <br /> Ground water elevation contour in feet referenced Location <br /> to mean sea level (MSL) Arrows indicate <br /> approximate ground water flow direction <br /> -740 Ground water elevation in feet Scale <br /> (ND) Benzene concentration in ppb <br /> ND =Not Detected 0 10 20 40 Feet <br /> (ND) MTBE concentration to ppb 1 Inch=20 Feet <br /> Note Monitoring performed on 11-Feb-99 <br /> Approximate Hydraulic Gradient= 0 003 - 0 02 Base map from Fugro map of t2 Nov 1992 <br /> PLATE GROUND WATER CONTOUR/CHEMICAL CONCENTRATION MAP <br /> Shell-branded Service Station CAMBRIA <br />. 2 4445 Pershing Avenue 240-0837 <br /> Stockton, California <br /> Drawn by WC Date 15-Apr-99 Approved By Date <br />