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TABLE 1 GROUNDWATEP MONITORING AND C1IEMICrL PESULTS FORMER REG..L STATION 603 6425 PACIFIC AVENEUE STOCE'TON CALIFORNIA Method 20 WELL 4 CASING TOP OF DATE DEPTH TO PROD VACUUM COPPECTED TOTAL PET SEHZENE TOLUENE FTH 1 XYLENES Methyl tett Butyl DIS^OLJED Dissolt ed ELEVATION SLAT TOP OF THICF AT WELL GW ELEV BIDROCARB BLNZENE Ether Ox,(LEI Lead FEET AMSI FEET AMSL WATEP HEAD FT AMSL GAS-RANGE 8020 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPR PPB PPB PPB PP14 Ppb MW1112 81 -37 19 10101/3 57 2 0 0 00 44 39 MW11 12 81 -37 19 la/0919 57 2 0 0 00 44 39 <50 <0 3 <0 3 <0 3 c0 9 M1411 12 81 -37 19 11/11/9 56 84 0 0 00 44 03 MWil 12 81 -37 19 12/o9/9 56 4 0 0 00 43 59 <50 <0 3 <0 3 <0 3 <0 9 MW11 12 81 -37 19 GI/15/9< 55 78 0 0 00 42 97 MW11 12 81 -37 19 02/08/9 54 78 0 0 00 41 97 MW11 12 81 -37 19 03/1119, 54 65 0 0 00 -41 84 <50 <0 3 <0 3 0 3 <0 9 MW11 12 81 -37 19 04/15/9 53 82 0 0 00 -41 01 Mwil 12 81 -37 19 05/1919 51 83 0 0 00 739 02 MW11 12 81 -37 19 06/14/9 53 00 0 0 00 -40 27 <50 <0 3 5 3 <0 3 <0 9 Mwil 12 8i -37 19 01/19/9 51 84 0 a 00 -39 03 MW11 12 81 -37 19 08120/9 53 42 0 0 00 -40 61 MW11 12 81 -37 19 39/2319 53 42 0 0 00 -40 61 MW11 12 81 737 19 09/15/9 53 6 0 0 00 -40 79 MW1I 12 81 -37 19 09/29/9 53 6 0 0 00 40 79 MW11 12 81 -37 19 09/29/9 53 6 0 0 00 -40 79 <50 <0 3 <0 3 <0 3 <0 9 MWil 12 81 -37 19 11/05/9+ 53 19 0 0 00 -40 38 MWli 12 81 -37 19 12/12/97 52 53 1 0 0 00 -39 72 MW11 12 81 -37 19 02/lo/94 52 4E 0 0 00 -39 67 <50 <0 5 1 a0 S <0 5 <0 5 Mwil 12 81 37 19 03/04/94 50 96 0 0 00 -38 15 8010 = all compounds below detection limlta MW11 12 81 -37 19 03/29/94 50 4 0 0 00 -37 59 <50 <0 5 <0 5 <0 5 <2 MW11 12 el -37 19 04/26/94 99 84 0 0 00 -37 03 MW11 12 61 -37 19 05/19/94 50 1 0 0 00 -37 29 MW11 12 81 -37 19 06/22/94 49 48 0 0 00 -36 67 <50 c0 5 <0 5 c0 5 <2 MW11 12 e1 -37 19 08/17/90 51 64 0 0 00 -38 83 Mwil 12 81 -37 19 09/14/9450 5 0 0 00 -37 69 <So <0 5 <0 5 <0 5 <2 MW11 12 81 -37 19 1a/05/94 50 7 0 0 00 -37 89 MW11 12 81 -37 19 12/16/94 50 25 0 0 00 37 44 c50 <0 5 <0 5 c0 5 c2 MW11 12 81 -37 19 O1/as/95 49 64 0 0 00 -36 83 MW11 12 81 37 19 03/19/95 48 73 0 0 00 -35 92 <50 c0 5 <0 5 <0 S <2 Mwll 12 81 -37 19 04/12/95 46 97 0 0 00 -36 16 MW11 12 81 -37 19 05/17/35 47 SB 0 0 00 39 77 MW11 12 81 -37 19 06/21/35 47 26 0 0 00 -34 45 <50 <0 5 <0 S <0 5 c2 Mwil 12 81 -37 19 03/01/95 47 36 a 0 00 34 55 MW11 12 81 -37 19 09/25/95 47 65 0 0 002 34 84 Mwil 12 81 -37 19 10/17/95 47 37 0 0 00 -34 56 Mwil 12 81 -37 13 11/14/95 47 05 0 0 00 -34 24 MW11 12 81 37 19 12/12/39 46 55 0 0 00 -33 74 Mwil 12 81 -37 19 01/22/95 45 62 0 0 00 -32 81 MW11 12 81 1 -37 19 03/06/96 44 36 0 0 00 -31 55 <50 <0 5 <0 5 <0 5 <2 MW11 12 81 -37 19 04/n9/96 43 02 0 0 00 -30 21 MW11 12 81 37 19 05/29/96 42 05 0 0 00 -29 24 MWil 12 81 -37 19 o6/2o/96 41 94 0 0 00 -29 13 <50 <0 5 0 5 <2 <50 3 MW11 12 81 -37 19 07/30/96 42 62 0 0 00 29 81 Mwil 12 81 37 19 0 /19195 43 28 0 0 00 30 47 <So <0 5 10 5 1 0 5 <2 32