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Table 1A Groundwater Analytical Data 7-Eleven Store#19976 1399 North Main Street Manteca,California Well No I Ethyl- MTBE Dissolved Elevation Date Benzene Toluene benzene Xylenes TPH-G 8020 8260 TBA DIPS ETHE TAME 1;3-DCA Ethanol Methanol Oxygen DTW SPT WYE (TOC) W (IrJIL) (uJll-) (I19t1-) (}j9r 1 tp (N911-) S gllL (jig/L) {la II.1 (N9/L) (Ijg/L (Ng/L) (ing1L) (m91L) {m IL) (ft) (ft) (ft) Water Grab Samples GP-1-W 04/29/98 3,000 1,400 520 2,500 19,000 430 380 <500 <25 <25 <25 -- - GP-2-W 04/29/98 21 036 24 25 1,600 16 <10 <100 <5 <5 <5 -- - -- -- - __ GP-3-W 04/29/98 5,800 11,000 5,500 28,000 290,000 4,200 3,700 <10,000 <500 <500 <500 - - - - - MW-5 W 05/11/99 200 140 110 520 1,500 120 75 <40 <10 <10 <10 - -- -- -- -- Monitoring Well Samples MW-1 31 99 09/16/98 281 <0 3 421 245 1 1,550 -- 738 <20 <5 <5 <5 - 1 2 1474 000 1725 12/30/98 904 317 282 147 2,860 -- 3830 <20 <5 <5 <5 - - - 06 1417 000 1782 02/18/99 75 <2 5 170 320 4,400 330 230 <50 <12 <12 <12 - - - 03 1426 000 1773 06/04/99 335 143 611 1,020 11,000 - 1,240 <100 <25 <25 <25 -- -- -- 02 1527 000 1672 09/14199 114 29 683 282 98 772 104 329 <5 <5 <5 -- -- -- - 1733 000 1466 11/04/99 44** 202'- 1 152-- 95 1** 530** 126`* 88** 33*" <5 <5 <5 -- 1 8 1760 000 1439 01/24/00 148 693 669 168 2,020 335 347 <20 <5 <5 <5 _ -- - 09 1770 000 1429 04/06/00 630 110 310 100 1,100 -- 140 <100 <4 <4 <4 - -- 44 1654 000 1545 07/21/00 22 <0 5 17 28 <100 - 90 <100 <4 <4 <4 <1 <15 <5 28 1800 000 13 99 10/12/00 23D <12 630 1,200 7,200 -- 1,100 860 <50 <50 <50 <25 <5 <5 06 18 15 000 1384 01/16/01 <0 5 052 0 93*" <1 <100 -- 610 <600 <20 <20 <20 -- -- -- 04 1800 000 1399 04/02/01 330 10 320 820 5,400 2,700 <2,500 <100 <100 <100 -- -- - 35 1885 000 1314 06/26/01 37 43 31 70 830 - 280 <250 <10 <10 <10 -- -- -- 2 1 2076 000 1123 11/28/01 91 <2 5 83 230 2,100 1,300 <200 <50 <50 <50 - 07 21 12 000 1087 01/30/02 83 <5 <5 <5 2,500 - 9,200 <1,000 <250 <250 <250 - - 10 1885 000 1314 04/04/02 150 <10 46 59 2,900a 4,100 5,600 1,400 <100 <100 <100 - 09 1972 000 1227 07/08/02 23 081 18 29 320 590 970 220 <12 <12 <12 - - 1 0 2087 000 11 12 MW-1A* 3209 09/16/98 <0 3 <0 3 905 3770 185 - <5 <20 <5 <5 <5 -- - 38 1539 000 1670 12130/98 <0 3 <0 3 <0 3 <0 6 <50 -- 538 <20 <5 <5 <5 - __ - 1 2 1445 000 1764 02/18/99 <0 5 <0 5 073 1 1 <50 <5 <5 <20 <5 <5 <5 -- -- -- 03 1449 000 1760 06/04199 1 3 05 175 214 <50 -- 106 <20 <5 <5 <5 _ 02 1564 000 1645 09/14/991 258 163 113 497 <50 1 <5 <5 <20 <5 <5 <5 - - - - 1778 000 1431 11/04199 1 26** 123** 0 59** 3 73** <50** <5** <5** <20** <5 <5 <5 - -- -- 30 1790 000 1419 01/24100 289 109 338 178 B4 <5 747 <20 <5 <5 <5 - -- -- 1 6 1785 000 1424 04106/00 1 5 1 1 11 38 <100 -- 22 <50 <2 <2 <2 -- -- 40 1709 000 1500 07/21/00 13 <0 5 <0 517 <100 -- 25 <50 <2 <2 <2 <1 <5 1 <5 1 9 18 62 000 1347 10112/00 18 84 7 9 42 210 46 <25 <2 <2 <2 <1 <5 <5 04 1837 _000_ 1_1372 7-11119976 tab xls Page 1 of 5 08-15-02