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' - Table 1 Groundwater Elevations and Sample Analytical Results Former E-Z Serve Location No 100878 1012 West Yoserrute Avenue,Manteca,California • Well No Sampling TOC DTW GWEr PSH TPHg B T E X MTBE (screened interval) Date (feet) _(feet) (feet) (feet) (4g/L) (4g/L) (4g/L) (µg L) (µg11.) MW-1 1130191 3185 1779 1406 000 3,400 24 52 <1 850 (10'-24') 5/17/91 31 85 1660 1525 000 1,700 38 90 86 310 -- 8/14/91 3185 2002 1183 000 320 11 3 6 10 -- 11/6/9I 31 85 1898 1287 000 490 19 12 18 55 -+ 2/18/92 31 85 1748 1437 000 680 17 42 68 230 7/1/92 3185 -- -- -- -- -- -- -- -- 9/12/92 31 85 21 59 1026 000 260 7 4 13 13 -- 12/23/92 31 85 1946 1239 000 55 2 <1 2 <1 -' 3/3193 31 85 1608 1577 000 940 18 13 79 230 7/4/93 3185 2036 1149 000 1,200 140 380 41 210 -- 9/15/93 31 85 21 62 1023 000 1,200 95 10 130 99 =- 12/21/93 31 85 1798 13 87 000 50 <1 <1 3 2 5/2/94 31 85 1722 1463 000 <100 <1 <1 <1 <1 -- 7/15/94 31 85 1827 1359 000 2,700 66 500 88 450 -- 9/27/94 31 85 2034 1151 000 <100 2 <1 4 4 -- 1217/94 3185 1786 1399 000 400 3 <0 5 26 59 3/24/95 3185 1468 1717 000 540 5 1 42 130 -- 6/22/95 31 85 1673 15 12 000 170 6 1 21 22 -- 9/15/95 31 85 1967 12 18 000 140 <1 11 73 99 -- 12/12/95 31 85 1760 1425 000 2,100 12 10 120 320 -- 2/22/96 31 85 1505 1680 000 1,900 24 60 100 200 -- 9117/96 31 85 1803 1382 000 470 5 1 32 40 1 12/10/96 3185 1572 16 13 000 2,800 19 6 180 440 73 4/15/97 31 85 1340 1845 000 3,200 18 <0 5 140 330 -- 6/20/97 31 85 1437 1749 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 11/21/97 31 85 1559 1626 000 4,500 19 37 180 480 <5 0 12/10/98 31 85 1237 1948 000 2,200 93 <0 5 100 250 <5 0 2/5/012 31 85 1403 1782 000 4,500 71 <1 0 190 330 1 5/24/01 31 85 1488 1697 000 2,900 65 <0 5 130 210 <0 5 11/8101 3185 1696 1489 000 1,800 53 <1 5 130 200 <1 0* 1/31/023 31 85 1430 1755 000 3,500 53 <0 5 200 2805 <1 5/2/02 31 85 1475 1710 000 7,700 64 <5 0 200 270 <10 1 8/23/02 31 85 1887 1298 000 1,600 20 13 82 91 <1 0 11/22/02 31 85 1775 1410 000 700 <0 5 <0 5 18 19 <0 5 MW-2 1/30/91 3154 1754 1400 000 680 21 9 7 47 -- (10'-24') 5/17/91 3154 1624 1530 000 1,400 88 46 61 240 =_ 8/14191 3154 1967 1187 000 110 6 <1 1 3 11/6/91 31 54 1863 1291 000 690 72 43 48 99 -- 2/18/92 3154 17 18 1436 000 820 71 7 98 140 711192 3154 9/12/92 3154 2123 1031 000 750 33 6 26 44 -- 12/23/92 31 54 19 15 1239 000 1,400 94 16 97 140 - ' 3/3/93 31 54 1582 1572 000 450 65 5 <1 79 =- 7/4/93 3154 1990 1164 000 870 72 280 21 210 9/15/93 3154 2123 1031 1000 230 9 2 15 10 -- 12/21/93 3154 1766 1388 000 4,200 130 460 230 1,100 -- 5/2/94 31 54 1687 1467 000 <100 2 <1 2 <1 -- 7/15194 3154 1785 1369 000 2,200 56 430 77 410 9/27/94 3154 ` 2001 1153 000 <100 1 <1 <1 <1 -- , F 12/7/94 31 54 1752 1402 000 800 21 10 83 260 == 3/24/95 31 54 1475 1679 000 2,800 48 51 190 650 6/22/95 3154 1667 1487 000 730 11 1 44 83 == 9/15/95 31 54 1935 1219 000 E <100 12 <1 23 40 1 12/12/95 3154 1744 1410 000 „ 2,600 19 74 120 350 ' I I I `2122/96 31 54 1484 1670 I 1000 2,500 31 1 22 I 90 I,220' MW-2 9117/96 1 3154 1769 13 85 000 500 28 1 1 15 31 4 (10'-24') 12/10/96 31 54 1546 1608 000 2,100 14 18 110 340 11 Page 1 of 5 'S 1E-Z61 � f SII' III I p II I