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i T412 Historical Groundwater Monitoring and Analytical Data 7-Eleven Store#19976 1399 North Main Street Manteca CA Well 1D/ Ethyl- MtBE 1,2- Eth- Meth- Dissolved Elevation Date Benzene Toluene Benzene Xylene TPH-G 8020 MtBE TSA DIPE EtBE TAME DCA EDB anol anol Nates Oxygen DTW SPT WTE TOC { A p /L p ) (p IL ) {pg/L IL) {p !L ) /L { IL) Im 1L m !L m !L fee fee fe Water Grab Samples GP 1 w 04/29/98 3,000 1,400 520 2,500 19,000 430 380 <500 <25 <25 <25 - - -- - __ _ P-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 05111!99 200 140 110 520 1,500 120 75 <40 <10 <10 <10 -- - - - ~ -- - - Monitonng Well Samples MW-1 3199 09116198 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 02/18/99 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 09/14/99 114 29 683 282 98 772 104 329 <5 <5 <5 ~ _ - - - 1733 000 1466 11/04199 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 04/06/00 630 110 310 100 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 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 13 99 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 -- -- -- - 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 - - -- -- 1 0 1885 000 1314 04/04/02 150 <10 46 59 2,900 4,100 5,600 1,400 <100 <i00 <100 - - - - 09 1972 000 1227 07/08/02 23 081 18 29 320 590 970 220 <12 <12 <12 - - - - 1 0 2067 000 11 12 10/03/02 43 <0 5 25 22 100 130 100 <25 <2 5 <2 5 <2 5 - -- - - 1 1 2000 000 1199 03/11/03 47 <1 0 39 30 180 -- 390 96 <1 0 <1 0 12 -- -- - - 31 1977 000 1222 06/27/03 077 <0 50 065 16 <50 - 55 11 <0 50 <0 50 <0 50 - - - -- 54 2042 000 11571 09/15/03 30 <0 50 22 30 78 - 150 30 <0 50 <0 50 <0 50 - - -- -- 60 2071 000 1128 12/23/03 36 <0 50 57 32 61 290 67 <0 50 <0 50 070 - - - - 32 2189 000 1010 03/29104 40 <0 50 81 29 180 -- 460 100 <0 50 <0 50 13 - - -- - 10 2103 000 1096 06/10/04 <0 50 <0 50 10 061 <50 - 140 25 <0 50 <0 50 <0 50 - -- -- - 54 2308 000 891 09/15/04 91 <0 50 93 23 510 -- 160 13 <0 50 <0 50 076 - - - -- e 67 2551 000 648 12/10/04 50 25 42 47 200 - 420 50 <0 50 <0 50 1 2 <0 50 <0 50 <5 0 <50 25 2335 000 864 02/10/05 <0 50 <0 50 <0 50 <0 50 <50 - 25 56 <0 50 <0 50 <0 50 -- -- - - 44 2234 000 965 06/03/05 30 <0 50 1 1 097 65 -- 84 14 <0 50 <0 50 <0 50 - - -- -- 44 2257 000 942 I 08/15/05 <0 50 <0 50 <0 50 <0 50 <50 - 72 <5 0 <0 50 <0 50 <0 50 - - - - 69 21 74 000 1025 117 ElevenV 11 Storest199761TebleM19976 Current Groundwater AsHistoncal Water Page 1 of 11