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Table 4. Historical Groundwater Sample Results Continued, <br /> ARCO Facility 434, Lodi, California <br /> Monitoring well <br /> number and Concentrations in pg/1. <br /> date sampled Benzene Toluene Ethylbenzene Xylenes TPH-G(a) MTBE <br /> 312/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/18/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/10/95 <0 5 <0 5 <0 5 07 <50 11/17/95 (t) -- -- -- -- <br /> 2/14/96 <br /> -2/14/96 1 3 29 053 17 68 -- <br /> 5/9/96(i) -- -- -- -- _- <br /> W-3 <br /> 4/10/87 30000 38000 1800 14000 180000 -- <br /> 7/23/87 12000 23000 2400 15500 227300 -- <br /> 11/13/87 3400 3200 2700 8500 176900 -- <br /> 10/3/88 103 148 19 95 -- <br /> 1/6/89 2250 4320 210 2600 -- -- <br /> 4/6/89 2990 70 240 2380 -- -- <br /> 7/11/89 1480 520 70 420 -- <br /> 10/17189 669 253 33 280 20000 -- <br /> 1/19/90 3200 2600 580 5300 -- <br /> 5/9/90 1800 910 130 1600 -- -- <br /> 10/03/90 4700 530 39 1600 -- <br /> 2/1/91 960 720 42 880 -- <br /> 4/16/91 3000 570 29 660 <500 <br /> 7/22/91 4100 800 120 950 39000 -- <br /> 10/22/91 1400 360 27 450 6200 -- <br /> 2/11/92 480 210 22 490 4100 -- <br /> 5/12/92 9500 850 260 2200 34000 -- <br /> 8/18/92 210 <5(g) 88 <5 (g) 1,200 -- <br /> 11/17/92 52 0 8 <0 5 10 1,000 -- <br /> 2/23/93 <l(h) <0 5 <0 5 <0 5 <50 -- <br /> 5/26/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/24/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/17/93 <0 5 <0 5 <0 5 <0 5 <50 — <br /> 3/22/94 04 04 <0 3 05 <10 -- <br /> 6/23/94 24 22 08 55 22 -- <br /> 9/28/94 l 8 <0 5 <0 5 <0 5 <50 -- <br /> 12/19/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 3/2/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/19/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 8/10/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/17/95 <0 5 <0 5 <0 5 <0 5 <50 <3 <br /> 2/14/96 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 5/9/96 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> I <br />