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<br /> TABLE 3
<br /> GROUNDWATER ANALYTICAL SUMMARY
<br /> Former ARCO Station No 6100
<br /> 25775 Patterson Pass Road
<br /> Tracy,Caltfonnta
<br /> Ethyl- Total
<br /> Sample Date GRO+ Benzene Toluene benzene Xylenes MTBE
<br /> ID Collected ( /L) ( ) ( IL) ( ) ( ) ( )
<br /> MW-6 06/17/03 61,000 A 7,200 A 8,800 A 270 A 17,000 A 110 A
<br /> MW-8 03/15/05 16,000 A <50 A <50 A <50 A 6,100 A <50 A
<br /> 06/21/05 42,000 A 470 A 580 A <50 A 19,000 A 290[10] J
<br /> 09/19/05 50,000 A 36 A 58 A <25 A 3,400 A <25 A
<br /> 12/19/05 240,000 A 290 A 1,400 A 560 A 24,000 A <250 A
<br /> ? 03/28/06 <25,000 A <250 A <250 A <250 A (68O:) 'J A <250 A
<br /> MW-9 09/19/05 2,200[12] J 47 [12] J 270 A <5 0 A 550 A <5 0 A
<br /> 03/28/06 3,300 A 200 A 290 A 27 A 1,200 A <5 0 A
<br /> MW-10 06/22/04 52,000 A 4,400 A 7,900 A 630 A 12,000 A <120 A
<br /> 09/07/04 46,000 A 4,600 A 5,000 A 530 A 9,400 A <100 A
<br /> 12/21/04 44,000[8] J 3,900 A 4,500 A 440 A 8,700 A <100 A
<br /> 03/15/05 31,000 A 3,700 A 3,200 A 270 A 6,500 A <50 A
<br /> 06/21/05 33,000 A 3,800 A 2,400 A 220 A 5,500 A <50 A
<br /> 09/19/05 40,000 A 3,900 A 2,900 A 240 A 6,000 A <25 A
<br /> 12/19/05 31,000 A 2,700 A 1,100 A 140 A 3,900 A <25 A
<br /> 03/28/06 14,000 A 2,600 A 490 A 72 A 1,300 A <25 A
<br /> Arco 6100_Qaarterly Data Page 2 of 9 5TPAru5
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