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• 02 Historical Groundwater Monitoring and Analytical Data 7-Eleven Store 1119976 1399!North Main Street Manteca CA well IDI Ethyl- MtBE 1,2- Eth- Meth- Dlssolved i Elevation Date I Benzene Toluene Benzene Xylene TPH-G 8020 MtBE TBA DIPS ELBE TAME DCA EDB anol anol Notes Oxygen DTW SPT WTE OC I { 0 ( I-) (P i� i i ( {p (POIL) �I u G} I feat} If fee>i 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 J N = = = ~ = GP 3-w 04/29/98 5,800 11,000 5,500 26,000 290,000 4,200 3,700 <10,OOC <500 <500 <500 Mw 6@w 05/11/99 200 140 110 520 1,500 120 75 <40 <10 <10 <10 Monitoring Well Samples MW-1 3199 09/16/98 281 <03 421 245 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 02/18/99 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 44 202 152 951 530 126 88 33 <5 <5 <5 -- — — -- b 18 1760 000 1439 01/24/00 148 693 569 168 2,020 335 347 <20 <5 <5 <5 -- — — — 09 1770 000 1429 04/06/00 630 11 0 310 100 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 1399 10/12/00 230 <12 630 1,200 7,200 — 1,100 860 <50 <50 <50 <25 — <5 <5 06 1815 000 1384 01/16/01 <0 5 052 093 <1 <100 -- 610 <500 <20 <20 <20 — — — — c 04 1800 000 1399 04/02/01 330 10 320 820 5,400 — 2,700 <2,500 <100 <100 <100 -- -- — -- 35 18 85 0 00 1314 06/26/01 37 4 3 31 70 830 -- 280 <250 <10 <10 <10 — -- — — 21 2076 000 11 23 11128!01 91 <2 5 83 230 2,100 — 1,300 <200 <50 <50 <50 -- -- — — 07 21 12 000 10 87 I I 1%7-Elevenl7 11 Stores1199761Tables119976 Current GroundwaterAsH3stoncal Water Pagel of 12