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I Table 1 Groundwater Elevation and Analytical Data ARCO Service Station No 5469 130 S Wilson Way, Stockton, CA 3 TOC Depth to Water Level Ethyl- Total E Well Date P1 Elevation Water Elevation GIRD DRO Benzene Toluene benzene Xylenes MtBE DO ! Number Sampled NP (feet msl) i (feet bgs) (feet msl) (jig/l.) (pg1L) (pg1L) (pg1L) (pg/L) (pg1L) (ug/L) {mglL} Comments I MW-1 ;03116120051 P 1628 4445 -2817 <50 <0 50 <0 50 <0 50 <0 50 60 1 3 10 08120051 P I 1628 4273 -2645 <60 -- <0 50 <0 50 <0 50 <0 50 58 10 109/08/20051 P j 1628 4307 -2679 <60 -- <0 50 <0 50 <050 <0 50 40 14 12108120051 P 1 1628 43 59 -2731 <50 -- <0 5D <0 so <0 50 <0 50 14 1 $ MW-2 03116120051 P 1588 4395 -2807 <50 - <0 50 <0 50 <0 50 <0 50 <050 21 106/08120051 P 1588 4216 -2628 <50 - <0 50 <0 50 <0 50 <050 <0 50 1 2 109108/20051 P 6 1588 42 57 -2669 <50 <0 50 <0 50 <0 50 <050 <0 50 28 112109120051 P 1 1588 4315 .2727 <50 -- <0 50 <0 50 <050 <0 5o <0 50 32 MW-3 103116/20051 P 1593 j 4400 -28 07 <50 <0 50 <0 50 <0 50 <0 50 21 12 ` 106/08120051 P 1593 1 4220 -2627 <50 -- <0 50 <0 50 <0 50 <0 50 19 10 09108120051 P 1593 4257 -2664 <50 <0 50 <0 50 <0 50 <0 50 089 1 5 1210812005 P 1593 1 4315 -2722 <5D -- <0 50 <0 50 <0 50 <0 50 0 67 13 MW-4 1 0311 612 005 1 P 1 1622 1 4442 -2820 3 900 160 <10 1 <10 <10 4 600 07 06108/20051 P E 1622 1 4270 -2648 <2 500 -- 1 30 <25 <25 <25 200014 4 I '09108/20051 P 1622 4305 -2683 <2,500 -- 53 <25 <25 <25 2,100 15 11210812005 P 1622 1 4367 -2735 <2,500 - <25 <25 <25 <25 2,800 15 MW-5 103116/20051 P 1601 4422 -2821 280 - <25 <2 5 I <2 5 <2 5 1802 U 106/0812005 P 1601 4251 -2650 <500 <5 0 T <5 0 1 <5 0 <5 0 164 1 4 8 09108/20051 P 1601 4292 -2691 55 <050 <0 50 <0 50 <0 50 57 4 0 112108120051 P 1601 ; 4337 -2736 <50 -- <0 50- 0 50 <0 5o <0 50 56 45 MW-6 103116/2005 P ,' 1589 I 4404 -2815 1 800 <10 <10 <10 <10 1 500 11 106/08/2005 PP 1589 i 4230 -2641 <25 000 - <250 <250 <250 <250 18 000 1 3 15 8 09108120051 P 9 1 42 65 -26 76 5 300 _ <54 <50 <50 <50 7 500 16 , 12108120051 P 11589 4317 -2728 <2,500 -- <25 - - <25 <25 <25 2,300 is , MW-7 03116120051 P 1 1649 1 4473 -2824 <50 <0 50 <0 50 ' <0 50 <050 <0 50 67 06108120051 P 16 49 I 4265 -26 16 <- -- ` <0 50 <0 50 <0 50 <050 <0 50 73 09/08/2005 I P 16 49 1 43 37 -26 88 <54 - <0 50 <0 50 - <050 <0 50 <0 50 1 8 12!08120051 P 1649 4385 .2736 <50 -- <0 50- <050 --<-05-07—<050 <0 50 1 94 MW-8 03/16/2005'i P I 1646 1 4467 -28 21 27 000 - 600 <100 <100 <100 23,000 0 8 06/08/2005 P 1 1646 42 95 -26 49 1 <25 000 <250 <2!50_L <250 <250 18,000 1 8 Report Date February 2,2006 �-- - Page 1 of 2