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Table 3. Analytical Results <br /> ARCO Facility 434, Lodi, California <br /> • Monitoring well <br /> number and Concentrations in u 1 <br /> date sampled Benzene Toluene Eth lbenzene Xylenes TPH-G(a) <br /> W-1 <br /> 4/10/87 120 <1.0 <1.0 <1.0 120000 <br /> 7/23/87 180 200 <2.5 190 <900 <br /> I1/13/87 1600 2300 1400 6900 147200 <br /> 1/5/89 3680 740 130 2280 - <br /> 4/10/89 2920 1050 <50 2830 - <br /> 7/11/89 1140 310 16 685 - <br /> 10/89 - - - - _ <br /> Destroyed 5/90 <br /> W-IA <br /> 4123190 490 81 4.1 540 <br /> 10/02/90 27 6 <0.5 8 <br /> 2/1/91 100 24 3.4 50 - <br /> 4/18/91 110 5.8 <0.5 6.3 250 <br /> 7/24/91 75 5.5 <0.5 4.6 530 <br /> 10/23/91 20 <0.5 <0.5 <0.5 200 <br /> 2/11/92 18 <1 <i <1 430 <br /> 5/12/92 5.6 <0.5 <0.5 <0.5 220 <br /> 8/18/92 6.5 <0.5 <0.5 <0.5 140 <br /> • 11/17/92 <0.5 <0.5 <0.5 <0.5 <50 <br /> 2/23193 <0.5 <0.5 <0.5 <0.5 <50 <br /> 5/26/93 <0.5 <0.5 <0.5 <0.5 <50 <br /> 8/23/93 <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 <0.3 <0.3 <0.3 <0.5 <10 <br /> 6/23/94 <0.3 <0.3 <0.3 <0.5 <10 <br /> 9/28/94 <0.5 <0.5 <0.5 <0.5 <50 <br /> 12!19194 <0.5 <0.5 <0.5 <0.5 <50 <br /> W-2 <br /> 4/10/87 4100 9200 680 5500 64000 <br /> 7/23/87 14000 25000 2300 16000 281700 <br /> 11/13/87 6200 5300 5600 13000 343900 <br /> 6/24/88 3570 3900 755 3000 - <br /> 10/3/88 260 500 110 410 - <br /> 1/6/89 4400 4540 510 2740 - <br /> 4/6/89 4200 110 450 2620 - <br /> 7111/89 2090 1500 200 1150 - <br /> 1018//89 496 206 87 219 - <br /> 1/22/90 3600 4500 470 5000 18000 <br /> 5/9/90 4900 4000 350 5000 - <br /> 10/2/90 2800 2300 260 2900 - <br /> 2/1/91 2600 1400 150 1600 - <br /> • 4/16/91 4300 2200 110 1700 16000 <br /> 7/24/91 4900 740 110 1300 16000 <br /> 10/23/91 440 120 64 410 4000 <br /> 2/10/92 - - _ _ _ <br /> 5112/92(b) <br />