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<br /> TABLE 3
<br /> GROUNDWATER ANALYTICAL SUMMARY
<br /> ARCO Service Station No 6100
<br /> 25775 Patterson Pass Road
<br /> Tracy,California
<br /> Ethyl- Total
<br /> Sample Date GRO+ Benzene Toluene benzene Xylenes MTBE
<br /> ID Collected ( /L) ( ) ( ) ( ) (140 ( )
<br /> VW-1 06/22/04 110,000 A 32,000 A 25,000 A <1,000 A 18,000 A <1,000 A
<br /> 09/07/04 120,000 A 32,000 A 23,000 A 890 A 13,000 A 620 A
<br /> VW-2 02/08/01 28,700 6,680 524 112 1,890 395
<br /> 03/26/02 33,000 9,700 670 1,000 3,500 350
<br /> 03/16/04 1,400 A 320 A 67 A <5 0 A 49 A 61 A
<br /> 06/22/04 36,000 A 9,000 A 3,500 A 310 A 5,400 A <250 A
<br /> 12/21/04 31,000[8] J 6,400[7] J 1,800 A 710 A 6,300 A 120 A
<br /> 03/15/05 26,000 A 1,600 A 6,000 A 1,200 A 3,700 A <120 A
<br /> 06/21/05 12,000 A 720 A 110 A 480 A 2,100 A 58[10] J
<br /> VW-3 02/08/01 33,800 2,540 2,820 194 5,550 1,000
<br /> 03/26/02 43,000 6,000 4,700 930 8,800 490
<br /> 03/16/04 24,000 A 3,100 A 870 A <50 A 3,600 A 180 A
<br /> 06/22/04 86,000 A 22,000 A 22,000 A 880 A 12,000 A 970 A
<br /> 09/07/04 27,000 A 4,100 A 2,400 A 200 A 4,600 A 360 A
<br /> 12/21/04 47,000[8] J 5,400[7] J 4,800 A 650 A 10,000 A 170 A
<br /> 03/15/05 21,000 A 740 A 1,600 A 270 A 6,900 A <50 A
<br /> 06/21/05 15,000 A 1,000 A 410 A <25 A 3,600 A 180[10] J
<br /> VW-4 02/08/01 605,000 33,900 27,500 3,070 24,200 1,890
<br /> 09/18/02 160,000 21,000 24,000 2,900 26,000 1,200
<br /> 06/22/04 78,000 A 9,300 A 10,000 A 1,600 A 23,000 A <250 A
<br /> 06/21/05 110,000 A 7,900 A 8,800 A <500 A 24,000 A <500 A
<br /> Arco_6100 Quarterly_Data Page 3 of 6 3TKATU5
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