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m m m mom m m m m m mqr <br /> TABLE 2 <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#20632 <br /> 4627 DaVnci Dnve <br /> Stockton, California <br /> Well ID! Ethyl- MTBE Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8020 8260 TBA RIPE ETBE TAME Oxygen DTW SPT WPE <br /> (TOC) (Ns«) WIL) (pg/L) OWL) tign) (Ngn-1 WIL) WIL) WIL) Wk) (x+98-) tom) (feet) (feet) (feat) <br /> Groundwater Grab Samples <br /> GP-1 1 02121!97 390 700 370 2100 16,000 16,000 — — <br /> GP-5 02/21/97 110 12 39 310 2,800 1,800 — — <br /> GP-7 02/21/97 34 65 26 110 440 58 — — <br /> GP-8 02/21/97 <0 50 <0 50 <0 50 0.84 830 1 600 1 870 — — — — <br /> GP-9 02/21/97 <0 50 <0 50 <0 50 1.1 <50 <5 0 — — — <br /> GP-10 02/21/97 <0 50 <0 50 <0 50 <0 50 <50 <5 0 <br /> MonitoringWell Sample <br /> MW-1 i <br /> 173 10/17197 65 <05 <05 13 $1 16 1 13 -- -- -- -- -- 713 000 -540 <br /> 03/22/98 ND ND ND 078 ND -- 47 ND ND ND ND 041 535 000 -362 <br /> i 06/15/98 <0 3 _<0 3 <0 5 <0 6 <100 -- <10 <100 <5 <5 <5 18 555 000 -382 <br /> 08125!98 <0 3 <0 3 ' <0 5 <0 6 <50 -- <5 <50 <5 <5 <5 -- 629 000 -456 <br /> 12/29198 <03 <0 3 <0 3 <0 6 <50 _ <5 I <20 <5 <5 <5 I 04 660 000 -487 <br /> 02/17/99 <0 5 <0 5 <0 5 <0 5 <50 52 86 <20 <5 <5 <5 05490 0 00 -317 <br /> 05/21/99 <0 3 <0 3 <0 3 <0 6 <50 -- <5 <20 <5 <5 <5 10 <br /> 605 000 1432 <br /> MW-2 i <br /> 282 10/17/97 <0 5 <0 5 <0 5 <0 5 440 1,800 2,304 -- .. - -- -- 837 0.00 -555 <br /> 03/22/98 ND ND ND 078 ND i -- 2,000 ND ND ND ND 020 661 000 -379 <br /> I <br /> 06/15/98 <0 3 <0.3 <0 5 <0.6 1,300 - 1,600 <2,000 <100 <100 <100 15 684 000 -402 <br /> 08/25/98 06 <0 3 <0 5 <0 6 1,550 -- 1,610 <2,000 <200 <200 <200 -- 77 000 -488 <br /> 12/29/98 <D3 <0.3 <0 3 <0.6 2,130 - 5,280 <800 <200 <200 <2000 04 776 000 -494 <br /> 02/17/99 <0 5 <0 5 <0 5 <0 5 770 3300 4,900 <1000 <250 <250 <250 09 613 000 -331 <br /> 05/21/99 1 3 85 <1 5 1 -0.5 <3 9 1$0 6.340 <400 A <100 <100 t <100 1 08 737 0.00 -4 55 <br /> 20632T62 WK4 Page 1 of 2 <br />