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Table 3. Analytical Results ARCO Station 434, Lodi, California (cont'd) Monitoring well number Concentrations to u Il and date sampled Benzene Eth lbenzene Toluene Xylenes TPH-G a W-3 4110187 30000 1800 38000 14000 180000 7/23/87 12000 2400 23000 15500 227300 11/13/87 3400 2700 3200 8500 176900 6124/88 103 19 148 95 - 10/3/88 2250 210 4320 2600 - 1/6/89 2990 240 70 2380 - 4/6/89 1480 70 520 420 - 7/11/89 669 33 253 280 - 1017//89 669 33 253 280 20000 1/19190 3200 580 2600 5300 - 5/9/90 1800 130 910 1600 - 10/03/90 4700 39 530 1600 - 2/1/91 960 42 720 880 - 4116/91 3000 29 570 660 <500 7/22/91 4100 120 800 950 39000 10/22/91 1400 27 360 450 6200 2111/92 480 22 210 490 4100 5/12/92 9500 260 850 2200 34000 . 8/18/92 210 88 <5 (c) <5(c) 1,200 11/17/92 52 <0 5 08 10 1,000 2/2."3 <1(e) <0.5 <0.5 <0.5 <50 W-4 7/23/87 16 09 <0 5 10 <900 11/87 2 3 9 32 <200 6/88 <0 5 <0 5 <0 5 <0 5 - 10/3/88 <0 5 <0 5 <0 5 <0 5 1/5/89 <0 5 <0 5 <0 5 <0 5 - 4/4/89 <0 5 <0 5 <0 5 <0 5 - 7/11/89 <05 <05 <05 <05 - 1016//89 <0 5 <0 5 <0 5 <0 5 - 1119/90 05 <0 3 04 06 <50 5/90 - - - - - 10/90 - - - - - 1/91 - - - - - 4/91 - - - - - 7/91 - - - - - 10/91 - - - - - 2/92 - - - -5/12/92 - - - - - 8/18/92 - - - - - 11/16/92 (d) - - - - - 2/22J'93(d)