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Table 4. Historical Groundwater Sample Results Continued, <br /> F <br /> ARCO Facility 434, Lodi, California <br /> Monitoring liven <br /> number and <br /> .r. date sampled Benzene Concentrations inµg/1„ <br /> Toluene Ethylbenzene Xylenes TPH-G a <br /> ) MTBE <br /> 11/13/87 <0.5 <0.5 <0.5 <br /> 211/88 <0.5 <0.5 <0.5 <0.2 <br /> 7/89 <0.5 <0.5 -- <br /> 10/89 - -- -- <br /> 1/]8/90 <br /> -1/18/90(d) -- <0.05 <br /> + 5/10/90 <0.3 <0.3 - '_ -- <br /> 10/05/90 <0.5 <0 5 <br /> <0.3 <0.3 _- <br /> 1/29/91 <0•5 <0.5 -- <br /> <0.5 <0.5 <0.5 <br /> 4/18/91 <0.5 <0'5 <br /> 1.3 <br /> 7/25/91 <0.5 <0.5 -_ <br /> <0.5 <0.5 <0.S <SO _ <br /> 10/24/91 <0.5 <0.5 <0.5 <50 <br /> 2/10/92 <0.5 <0.5 <50 <br /> 0.5 <0.5 <0.5 <br /> 5/12/92 <0.5 < <0.5 <50 _- <br /> $/18/92 0 5 <0.5 <0.5 -- <br /> <0.5 <0.5 <0.5 <50 -- <br /> ,�, <br /> 11/17/92 <0.5 < <0.5 <50 <br /> 2/22/93 <0.5 <0 5 <0.5 <0.5 <50 -- <br /> L < -- <br /> 5/25/93 0.5 0.5 <O.S <br /> <0.5 <0.5 <50 -- <br /> $124/93 <O.S <0.5 <0.5 <50 <br /> 1 1/16/93 <Q 5 <0.5 <O.S - <br /> <0.5 <0.5 <0.5 <50 <br /> 3/22/94 <0.3 < <0 5 <50 <br /> 6/23/94 <0.3 <0.3 <0.3 <0.5 <10 <br /> 9/28/94 <0.5 <0.5 <0.3 <0.5 <10 - <br /> 12/19/94 <0.5 <0.5 <Q.5 <0.5 <50 <br /> 3/2/95 <0.5 < 0.5 <0.5 <50 -- <br /> 0.5 <0.5 <0.5 <50 <br /> 5/19/95 <0.5 <0.5 <br /> 8/11/95 <0.5 <0.5 c0.5 <br /> 0 <0.5 <50 <br /> I 1/17/95(f) -- 5 <0.5 <50 -- <br /> 2/14/96 <0-5 <05 ' -- -- _- <br /> 5/9/96(f) _- <0.5 <0.5 <50 <br /> W-9 <br /> { <br /> 4/23/90 2000 <br /> 12 <br /> 10/02/90 320 1 O. 3200 <br /> * <br /> 2/1/91 180 <0.5 610 <br />�. 4/16/91 440 199 0.8 50 <br /> 4100 2. -- <br /> 7/22/91 I.0 1.4 130 <br /> 0 < 830 -- <br /> 10/22/91 i 50 <0.5 <0 5 If 1400 <br /> 2/1 1/92 0.5 2.8 420 <br />� 180 <I < -- <br /> 5/12/92 1 <1 430 <br /> 8/18/92 14 <0.5 <0.505 <0.5 73 <br /> 11/17/92 <0.5 < <0.5 <50 -. <br /> 2/23/93 <0.5 <0 5 <0.5 <0.5" <50 _ 1 <br /> 05 < <br /> 5/26/93 <0.5 < <0.5 <0.5 <50 <br /> 8/23/93 <O.S <0 5 <0.5 <0.5 <50 <br /> <0.5 0.5 <br /> 'I 1/17/93 <0 <0.5 <br /> .5 <0 5 < <50 <br /> 6 <br />. I <br /> I � <br />