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N <br /> MW-4 <br /> 60' 10' <br /> ND ND 5 0' 9.5 <br /> ND NG ND ND <br /> NG ND 6.0' 0' NO NR <br /> ND ND ND NO NO NO 5.5' <br /> ' <br /> ND NO ND NB ND ND ND ND ND ND <br /> ND ND NDI NO . NO <br /> NO ND B-2ND <br /> • N p 6 0' 13' <br /> ' <br /> B-12 NND ND <br /> ND B-4 B-3 B-5 ND ND <br /> ' � 5 0' 9.5, � D D <br /> ND ND NO ND 9 5' 6 D 5 5' 9.5' <br /> ND ND NO ND 3400 8 580 <br /> ' ND ND NO NO 11 17 0.62 <br /> NO ND NO ND 44 D 047 <br /> ND IND I ND 37 g' 170 .28 4.9 <br /> ND 450 B-10 0095 16 <br /> 13 1 2 <br /> ND 4.5 <br /> 14 9.$ B-1 5 O' 9.5' <br /> ND 55 B-9 8-11 NO NO <br /> B-7 40 B-8 ND ND <br /> MW-2 ND NO <br /> B--6 3.5' 9 0 6.0 10' ND NO <br /> 6.0' 10' ND NO NO ND <br /> ND NO 31 0.14 NO ND ND <br /> ND NDND NO ND NO <br /> ND ND ND ND ND ND NO ND <br /> ND ND NO 0 019 ND <br /> NO I ND- <br /> NO, ND ND <br /> do <br /> � NO <br /> MW-1 <br /> 6.0' 10' <br /> LEGEND N N <br /> Np ND <br /> ND ND <br /> MW- —qND ND <br /> MONITORING WELLS <br /> NO ND <br /> B-12 EXPLORATORY SOIL BORINGS <br /> (See the Mlttelhauser Preliminary Investigation <br /> and Evaluation Report dated January 1992, <br /> presented In Appendix A). <br /> GROUNDWATER GRADIENT FLOW DIRECTION <br /> TPI-Ig <br /> BENZENE <br /> TOLUENE <br /> E HYLBENZENE PHASE I INVESTIGATION <br /> XYLENES BAS O <br /> O 30 12 12 9 UNOCAL SERVICE STATION 18348 <br /> TRACY CALIFORNIA <br /> SCALE IN FEET M ' <br /> at2lfiorT FIGURE 2 0 <br />