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r� � r r r r r r �r r� rr r r� r� .r r� r■� Table 1A Groundwater Analytical Data 7-Eleven Store#19976 1399 North Main Street Manteca,California Well No 1 Ethyl- MTBE Dissolved Elevation Date Benzene Toluene benzene Xylenes TPH-G 8020 8260 TBA DIPS ETBE TAME 1,2-DCA Ethanol Methanol Oxygen DTW SPT WTE (TOC) (NgIL) (Ng1L) (NgIL) (IJgIL) (ug1L) (pg{L) (pg1L) (I1g/L) (Ng1L) (pgIL) (NgIL) (NgIL) (mglL) (mglL) (mg/L) (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 1 <5 <5 <5 - -- -- -- -- -- - GP-3-W 04/29/98 5,800 11,000 5,500 1 28,000 290,000 4,200 1 3,700 <10,000 <500 <500 <500 - - -MW-5@_W 05/11/99 200 140 110 520 1,500 120 1 75 <40 <10 <10 <14 -- -- - - Monitoring Well Samples MW-1 3199 09/16/98 281 <0 3 421 245 1,550 - 738 <20 <5 <5 <5 - -- 12 1474 000 1725 12/30/98 904 317 282 147 2,860 -- 3830 <20 <5 <5 <5 - -- 06 1417 000 1782 02/18199 75 <25 170 320 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 09/14/99 114 29 683 282 98 772 104 329 <5 <5 <5 - - - -- 1733 000 1466 11/04/99 44** 20 2** 15 2** 95 1** 530** 126** 88** 33*" <5 <5 <5 - - - 18 1760 000 1439 01/24/00 148 693 569 168 2,020 1 335 347 <20 <5 <5 <5 - -- -- 09 1770 000 1429 04/06/00 630 110 31 0 100 1,100 -- 140 <100 <4 <4 <4 - -- 44 1654 000 1545 07121100 22 <0 5 17 28 <100 - 90 <100 <4 <4 <4 <1 <15 <5 28 1800 000 1399 10/12/00 230 <12 630 1,200 7,200 - 1,100 860 <50 <50 <50 <25 <5 <5 06 18 15 000 1384 01116101 <0 5 052 0 93*** <1 <100 610 <500 <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 06126101 37 43 31 70 830 - 280 <250 1 <10 <10 <10 - - - 21 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 07108/021 23 081 18 29 320 590 970 220 <12 <12 <12 - - 10 2087 000 11 12 10/031021 43 <0 5 26 22 100 130 100 <25 <2 5 <2 5 <2 5 - - 1 1 2000 000 11 99 MW 1A* 3209 09/16/98 <0 3 <0 3 1 905 3770 185 -- <5 <20 <5 <5 <5 t - 38 1539 1 000 1670 12/30/98 <0 3 <0 3 <0 3 <0 6 <50 -- 538 <20 <5 <5 <5 -- -- - 1 2 1445 000 1764 02/18199 <0 5 <0 5 073 11 <50 <5 <5 <20 <5 <5 <5 - - - 03 1449 000 1760 06/04/99 3 05 175 214 <50 -- 106 <20 <5 <5 <5 -- 02 1564 000 1645 09/14/99 258 163 1 13 1 497 <50 <5 <5 <20 <5 <5 <5 _ __ - 1778 000 1431 11/04/99 1 26** 1 23** 0 59** 1 3 73** <50** <5** <5** <20** <5 <5 <5 - - - 30 1790 000 1419 01/24100 289 '109 338 178 84 <5 747 1 <20 <5 <5 <5 -- 16 1785 000 14 24 04106100 16 1 1 1 1 38 <100 -- 22 <50 <2 <2 <2 __ __ -- 40 1709 000 15 OD 07/21/00 13 <0 5 <0 5 17 <100 - 25 <50 <2 <2 <2 <1 <5 <5 19 1862 000 1347 . 10/12100 18 84 79 42 210 - 46 1 <25 <2 c2 <2 <1 <5 <5 04 i18 37 000 13721 7-11119976 tab xis Page 1 of 5 11-01-02