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TABLE 2 ANALYTICAL TESTING RESULTS ' Montgomery Ward Auto Service Center Former Unocal Branded Semce Station#5098 page 3 of 7 Stockton, California ' parts per billion Sample ID DTW TPH-G Benzene Toluene Ethylbenzene Xylenes 1,2-DCA MTBE 12/19/95 4720 490 40 <0 3 42 24 088 NA 03/11/96 4354 980 f 48 1 7 39 35 1 6 <50 06/19/96 4523 950 110 21 15 18 24 <200 ' 09/17/96 4793 2400 78 21 11 87 49 130 12/05/96 4296 430 57 12 071 <0 5 1 5 <30 03/24/97 4169 2, 2 6 1 8 <0 5 076 1 5 <30 ' 06/18/97 4305 <50 21 <0 3 <0 3 <0 6 1 8 <2 0 MW-7 ' 03/11/96 4391 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <50 06/19/96 4530 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <30 09/17/96 4752 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <30 12/05/96 4341 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <30 03/24/97 4105 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <30 06/18/97 4262 <50 <0 3 <0 3 <0 3 <0 6 <0 5 <2 0 N UNOCAL SITE MW-10 06/03/92 NM 960 72 2 33 86 12 NA 09/30/92 NM 1000 26 0 85 46 10 12 NA 12/30/92 NM 820 25 1 5 53 36 5 2 NA 03/25/93 NM 470 5 5 <0 50 21 0 62 22 NA 06/28/93 5723 220 17 ND 26 062 1 2 NA 09/29/93 51175 ND 2 5 ND 62 ND ND NA 12/20/93 NM 110 1 1 065 54 ND 28 NA 03/29/94 5009 220 1 5 ND 13 077 2 9 NA 06/28/94 5457 <50 ! <0 50 <0 50 4 0 8 <0 50 NA 09/14/94 5717 100 61 72 6 57 25 NA 12/06/94 5263 130 17 085 054 091 NA NA 02/08/95 4986 82 12 <0 50 <0 50 <0 50 NA NA 06/21/95 5014 <50 <0 50 <0 50 <0 50 <0 50 NA NA ■ 09/19/95 5223 <50 <0 50 085 <0 50 <0 50 <0 50 NA 12/19/95 4734 <50 <0 50 <0 50 <0 50 <0 50 NA NA I 03/11/96 4392 NS NS NS NS NS NS NS 06/19/96 4505 <50 <0 50 <0 50 <0 50 —<050 NA <5 0 09/17/96 4729 <50 <0 50 <0 50 <0 50 1 <0 50 —072 <5 0 12/05/96 4306 NS NS NS NS NS NS NS 03/24/97 NM NS NS NS NS NS NS NS 06/18/97 NM NS NS NS NS NS NS NS IProject No 1232 ENVIRONMENTAL AUDIT, INC .