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0. <br /> S <br /> �Drleans <br /> X Fence <br /> F R•8 1 <br /> O� 1 (45.0) <br /> ZI <br /> A rR•2 <br /> ARwvun.Wall (ND <br /> (N ) X A�4 + <br /> P=P uL <br /> ARCO <br /> +-ATR-11 STATION <br /> (ND) ATR-7 <br /> v (13' <br /> n <br /> m <br /> IATR-3 y <br /> (230 PrcdLa �+ <br /> Un <br /> 5torag�T� <br /> A b <br /> Wendy's j <br /> Restaurant .}ATR-4 <br /> (22) 5,a <br /> + <br /> 0.6 <br /> ATR-12 <br /> ! (ND) NO Road <br /> Clover <br /> A-M-10 + <br /> (ND) U <br /> Restaurant <br /> 1 <br /> Explanation <br /> ATR-2 Monitoring Well and Number <br /> t <br /> Benzene Concentration,ug/1 <br /> Benzene Isoconcentration Line. 10 20 30 40 ` <br /> i a•� Logarithmic Contour Intervi-I" a <br /> Dashed Where Approximated <br /> Scale in feet <br /> (ND) Not Detected:Less &i to t <br /> Limit of 0.5 ug/1 <br /> Figure 5. Benzene Isoconcentration Map, September 24, 1991, <br /> ARCO Station 2093,Tracy, CA <br />