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■r r■r r r r r r rr r r r r r r r rr r rr r <br /> Table 2 <br /> Historical Groundwater Monitoring Data <br /> 7-Eleven Stare#20632 <br /> 4627 DaVinci Drive <br /> Stockton,California <br /> Well ID/ Ethyl- MTBE Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8020 8260 TBA DIPE ETBE TAME Oxygen DTW SPT WTE <br /> (TOC) (Ng/L) (mg L) (lsglL) (s 9rL) (G91L) (Ng/L) (pg/L) (Ng/L) (pg'L) (NgrL) (mqll-) (feet) (feet) (feet) <br /> Groundwater Grab Samples <br /> GP-1 02/21/97 390 700 370 2,100 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 6 5 26_ 110 440 <br /> _ -- -- -- -- -- --- <br /> GP-8� 02 1 <br /> /21/97 <0 50 <0 50 <0 50 0 94 830 ,800 —870-- <br /> rG <br /> 02/21/97 <0 50f <0 50 <0 50 1 1 <50 <5 0 <br /> 02/21/97 -_.<050 <0 50 <0 50 <0 50 <50 <50 <br /> ell Samples 10/17/97 65 <0 5 <0 5 13 51 16 13 -- -- -- -- -- 713 000 -540 <br /> 03/22/98 ND ND ND 078 ND -- 47 ND ND ND ND 041 535 000 -362 <br /> 06115/98 <0 3 <0 3 <05 <0 6 <100 -- <10 <100 <5 <5 <5 18 555 000 -382 <br /> 08/25/98 <0 3 <0 3 <0 5 <0 6 <50 -- <5 <50 <5 <5 <5 -- 629 000 -456 <br /> 12/29/98 <0 3 <0 3 <0 3 <06 <50 -- <5 <20 <5 <5 <5 04 660 000 -487 <br /> 02/17/99 <0 5 <0 5 <0 5 <0 5 <50 52 86 <2 <5 <5 <5 05 49 000 -317 <br /> 05/21/99 <03 <0 3 <0 3 <0 6 <50 -- <5 <20 <5 <5 <5 10 605 000 432 <br /> 08/28/99 <0 3 <0 3 <0 3 <06 <50 581 554 <20 <5 <5 <5 09 680 000 -507 <br /> 11/24/99 091 378 241 688 259 <5 <5 <20 <5 <5 <5 10 660 000 .-487— <br /> MW-2 <br /> -487MW-2 <0 5 <0 5 <0 5 <0 5 440 1,800 2,300 -- -- 837 000 -556 <br /> 2 82 10!17197 -' `" -- <br /> 03/22/98 ND ND ND 078 ND -- 2,000 ND ND ND ND 02 661 000 -379 <br /> 06/15/98 <0 3 <0 3 <0 5 <06 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 <0 3 <0 3 <0 3 <06 2,130 -- 5,280 <800 <200 <200 <2000 04 776 000 -494 <br /> 02/17199 <0 5 <0 5 <0 5 <0 5 770 3,300 4,900 <1,000 <250 <250 <250 09 613 000 -331 <br /> 05/21/99 385 <1 5 <1 5 <3 1,180 -- 5,340 <400 <100 <100 <100 08 737 011 -4 55 <br /> 08/28/99 <0 3 <0 3 <0 3 <0 6 2,100 -- 5,130 <800 <200 <200 <200 08 795 0 00 -5 13 <br /> 11/24/99 1 04 288 <0 3 177 3,490 5,830 7,450 _ <800 <200 <200� <200 18 785 000 ---503 <br /> 20632TB1 WK4 Page 1 of 2 IT CORPORATION <br />