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. Table 3. Analytical Results for <br /> ARCO Facility 2093, Tracy, California <br /> Monitoring well Concentrations in L <br /> number and Methyl <br /> date sampled Benzene Toluene Ethvlbenzene Xylenes TPH-G (a) Tert-Butyl Ether <br /> 12/27/89 3 5 <0 3 1 1 0 3 <50 -- <br /> 4/18/90 2 9 <0 3 <0 3 <0 3 50 -- <br /> 10/16/90 <0 5 <0 5 <0 5 <0 5 <50 1/10/91 0 8 <0 5 <0 5 <0 5 <50 -- <br /> 4/10/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/10/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 9/24/91 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 1/23/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 4/20/92 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/8/92 2 8 <0 5 <0 5 <0 5 <50 -- <br /> 10/7/92 5 7 <0 5 <0 5 <0 5 59 <br /> 1/18/93(b) -- -- -- -- -- <br /> 4/I4/93 3 8 0 7 0 8 t 9 55 -- <br /> 8/30/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/27/93 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/18/94 0 7 0 9 <0 3 0 7 <I0 -- <br /> 5/20/94 0 9 <0 3 <0 3 <0 5 <10 -- <br /> 10/7/94 <0 5 <0 5 <0 5 <0 5 <50 -- <br />• 12/16/94 <0 5 <0 5 <0 5 <0 5 <50 =_ <br /> 2/28/95 <0 5 <0 5 <0 5 <0 5 <50 <br /> 4/25/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 7/27/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/26/95 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 2/12/96 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 4/18/96 <2 5 <2 5 <2 5 <2 5 <250 -- <br /> 7/18/96 <0 5 <0 5 <0 5 <0 5 <50 500 <br /> ATR-3 <br /> 4/23/87 2300 180 <5 0 2300 17000 -- <br /> 12/22/87 5000 50 530 250 -- <br /> 3/24/88 8300 8700 4400 7800 43000 -- <br /> 6/23/88 6160 4221 1800 4750 70000 -- <br /> 9/29/88 8850 17600 2190 8170 57400 -- <br /> 2/22/89 1000 2100 480 2000 110000 -- <br /> 6/29/89 890 520 250 1100 4500 -- <br /> 9/18/89 I000 1300 460 2200 7400 -- <br /> 12/28/89 840 1400 840 5600 27000 -- <br /> 4/18/90 1000 490 340 1500 4800 <br /> 10/16/90 1900 1300 780 4600 14000 -- <br /> 1/10/91 610 230 160 670 2600 -- <br /> 4/10/91 910 120 110 190 3000 -- <br /> 7/10/91 420 300 340 760 19000 -- <br /> 9/24/91 280 81 69 130 2000 <br /> 1/23/92(d) -- -+ -- -- -- -- <br /> 4/20/92(d) <br /> 33151TABLES12093AUG6 US <br />