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Table 3. Analytical Results <br /> ARCO Station 434, Lodi, California <br /> Monitoring well <br /> number Concentrations in ug/l <br /> and date sampled Benzene Eth lbenzene Toluene Xylenes TPH-G a <br /> W-1 <br /> 4110187 120 <10 <10 <10 120000 <br /> 7/23/87 180 <2 5 200 190 <900 <br /> 11/13/87 1600 1400 2300 6900 147200 <br /> 115/89 3680 130 740 2280 - <br /> 4/10/89 2920 <50 1050 2830 7/11/89 1 140 16 310 685 - <br /> 10/89 - - - - - <br /> Destroyed 5/90 <br /> W-1A <br /> 4/23190 490 41 81 540 - <br /> 10/02/90 27 <0 5 6 8 - <br /> 2/1191 100 3 4 24 50 - <br /> 4/18/91 110 <0 5 5 8 63 250 <br /> 7/24/91 75 <0 5 5 5 46 530 <br /> 10/23/91 20 <0 5 <0 5 <0 5 200 <br /> 2/11/92 18 <1 <1 <1 430 <br /> 5112192 5 6 <0 5 <0 5 <0 5 220 <br /> • 8118/92 6 5 <0 5 <0 5 <0 5 140 <br /> 11/17/92 <0 5 <0 5 <0 5 <0 5 <50 <br /> 21-31'93 <0.5 <0.5 <0.5 <0 5 <50 <br /> W-2 <br /> 4/10/87 4100 680 9200 5500 64000 <br /> 7/23/87 14000 2300 25000 16000 281700 <br /> 11/13/87 6200 5600 5300 13000 343900 <br /> 6/24/88 3570 755 3900 3000 - <br /> 10/3/88 260 110 500 410 - <br /> 1/6/89 4400 510 4540 2740 - <br /> 4/6/89 4200 450 110 2620 - <br /> 7/11/89 2090 200 1500 1150 - <br /> 1018//89 496 87 206 219 - <br /> 1/22/90 3600 470 4500 5000 18000 <br /> 5/9/90 4900 350 4000 5000 - <br /> l0/2J90 2800 260 2300 2900 <br /> 2/1/91 2600 150 1400 1600 - <br /> 4/16/91 4300 110 2200 1700 16000 <br /> 7/24/91 4900 110 740 1300 16000 <br /> 10/23/91 440 64 120 410 4000 <br /> 2/10/92 - - - - - <br /> 5/12/92(b) <br /> 8118/92(b) - - - - <br /> 11/16/92(b) <br /> 2J22J93(b) <br />