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ROSE MARIE LANE <br /> Planter <br /> ' *MW-1 <br /> -910 <br /> \ ; Waste (9 2) <br /> - - Oil (ND) <br /> ' Tank <br /> w <br /> El Z <br /> Z <br /> Air& <br /> Water --.� -- - d <br /> Fuel USTs <br /> ---------- <br /> Station - <br /> Building <br /> A, <br /> Canopy and <br /> MW-2 Dispenser El Exxon <br /> _8.39 , 0 Islands F Monitoring <br /> (20) , Well <br /> N (ND) i 0 ` <br /> -MW-4 _ <br /> - Vent Lines - - - - - - - - - - -8 4 <br /> VE -2 (2 0) O <br /> ____________ __________ (ND) I�� <br /> i VEW-1 0 <br /> NA //*MW-3 <br /> (14) -929 <br /> EXPLANATION (54) (ND) <br /> Ground Water Monitoring Well - - (ND) <br /> Vapor Extraction Well Former USTs <br /> 00 Ground water elevation contour in feet referenced Location ` <br /> to mean sea level (MSL) Arrows indicate <br /> approximate ground water flow direction <br /> -910 Ground water elevation in feet Scale <br /> (9 2) Benzene concentration in ppb <br /> ND=Not Detected 0 t0 20 40 Feet <br /> (ND) MTBE concentration in ppb 1 Inch=20 Feet <br /> Note Monitoring performed on 10-Feb-98 <br /> Approximate Hydraulic Gradient=0 01-0 04 Base map from Fugro map of 12-Nov-1992 <br /> PLATE GROUND WATER CONTOURICHEMICAL CONCENTRATION MAP <br /> Stell Service Station CAMBRIA <br /> 2 4445 Pershing Avenue 240-0837 <br /> Stockton, California <br /> Drawn by TNM Date 6-Apr-98 Approved By - -Date <br />