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I l 1 r I Table 3 Historical Groundwater Analytical Results Former Unocal Station No 5098 5400 and 5606 Pacific Avenue Stockton,California SAMPLE DTW TPHg BENZENE n-BUTYL sec-BB 1,2-DCA EB IPB MtBE NAPHT n-PB TOLUENE 1,2,4-TMB 1,3,5-TMB XYLENES Methanol Ethanol ID t) (u LL) (N-14 (u 1L) (u /L) o' /L) (u /L) (u /L) at /L (u /L) (" /L) a /L) (i L (u /L) (u L) (u L 0191L) 11 VAPOR EXTRACTION WELLS VEW-2B 03/18/98 3780 81800 6040 <100 <100 <100 3020 149 <200 842 460 13800 2990 820 15290 NA NA 06/24198 3599 65000 3670 <100 <100 <200 1840 <100 <200 447 134 13400 2450 633 15230 NA NA 09/16/98 3893 71200 2600 <100 <100 <100 2990 152 <200 598 359 7730 3250 819 15060 NA NA 12/22/98 3341 43700 2610 <100 <100 <100 1420 1100 <200 560 169 6060 2420 603 10870 NA NA 03/18/99 31 18 31000 3040 <100 <100 <160 913 1100 <200 210 106 3080 1470 373 7230 NA NA It 06/18/99 3432 25000 2070 <100 <100 <100 1860 108 <200 818 208 4640 2610 670 12830 NA NA Not accessible due to the presence of remediation equipment VEW-3 03118/98 3803 96000 3630 185 <100 <100 4190 146 <200 722 526 21700 3570 978 22390 NA NA 06/24/98 3590 132000 4260 784 <100 <200 6210 330 <200 997 1150 20600 8870 2650 33790 NA NA 09/16/98 3877 119000 1900 <100 <100 <100 4220 <100 <200 338 <100 25900 3840 1160 23570 NA NA 14 12/22/98 3352 87200 4330 <100 <100 <100 3830 <100 <200 902 319 16600 2900 751 20450 NA NA 03/18/99 31 22 150000 3540 <100 <100 <100 4330 193 <200 1230 712 14900 5250 1510 23840 NA NA II 06/18/99 3410 46600 2240 <100 <100 <100 4340 <100 <200 1550 434 15200 3890 1000 24600 NA NA Not accessible due to the presence of remediation equipment VEW-4 03/18/98 3800 22900 3050 <50 <50 <50 1220 65 <100 390 190 465 1230 420 2907 NA NA 06/24/98 3568 9200 1180 <10 <10, <50 173 13 <20 18 14 79 367 181 738 NA NA 09116!98 3852 7110 315 <1 0 17 <110 150 348 <2 0 138 504 38 534 234 2727 NA NA 12/22/98 3341 4240 271 <10 15 <10 811� 11 <20 30 14 42 118 94 208 NA NA 03/18/99 31 09 5160 326 <1 0 28 <1I0 129 73 <2 0 28 125 249 136 614 539 NA NA 06/18/99 3383 2350 400 <1 0 <1 0 <110 B1 9 71 <2 0 182 84 149 124 532 433 NA NA Not accessible due to the presence of remediation equipment I �I VEW-5 6 03/18/98 3755 13100 2800 <50 <50, <50 1130 60 <100 110 160 210 500 180 1000 NA NA 06/24/98 3557 28800 1830 <50 <50 <100 1 13610 60 <100 123 135 3610 1080 325 4760 NA NA 09/16/98 3847 10300 668 501 11 1 449 729 483 <2 0 41 8 895 368 611 283 1076 NA NA II 12/22/98 3313 16000 1870 <10 <10, <10 1190 79 <20 184 213 85 876 327 1424 NA NA 03/18/99 3086 14800 1590 <10 <101 <10 982 49 <20 175 125 422 562 213 1839 NA NA 06/18/99 3375 7480 859 <10 <10 <10 543 39 <20 184 87 35 688 202 1353 NA NA Not accessible due to the presence of remediation equipment VEW-6A 12/01/03 N NA NA NA NA` NA NA NA NA NA NA NA NA NA NA NA ()6940 9 EN rporation i i ��M i i i i i i i i i li