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■�� 111 !• i TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERS14ING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration( /L) Well Elevation to Water Elevation Thickness Ethyl_ Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene X lenes TPH-g MTBE I MW7 05/20/98 6 85 1398 -7 13 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 05/20/98 685 <2 Q* MW7 08/19/98 6 85 1543 -858 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 08/19/98 6 85 <2 0* MW7 11/18/98 6 85 1582 -897 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 03/30/99 685 -- -- MW7 _MW7 05/05/99 6 85 14 33 -748 000 <0 5 <0 5 <0 5 0 637 54-2 <2 0 MW7 08/20/99 685 1575 -890 000 -- __ __ MW7 12/06/99 6 85 1597 -912 000 <1 <1 <1 <1 92 <1 Mi W 7 02/29/00 685 13 51 -666 000 1 6 <1 <1 <1 64 <1 MW7 05/16/00 6 85 1365 -680 000 <1 <1 <1 <1 <50 <1 MW7 09/11/00 685 1592 -907 000 <05 <05 <05 <05 53 <05 MW7 12/13/00 685 15 83 -8 98 000 076 2 8 063 309 <50 <0 5 MW7 03/08/01 6 85 1497 -8 12 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW7 06/21/01 685 1633 -948 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW7 09/20/01 6 85 16 82 -997 000 -- _- _- MW7 12/04/01 6 80 17 18 -1038 000 -- -- MW7 03/05/02 6 80 1635 -955 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 MW7 06/11/02 6 80 -- -- MW7 09/10/02 680 1800 -1120 000 MW7 12/18/02 680 1773 -10 93 000 -- -- - -- MW7 03/24/03 6 80 1725 -1045 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 MW7 06/11/03 680 1738 -1058 000 -- __ MW7 09/17/03 6 80 1871 -11 91 000 MW7 1210810' 6 80 1874 -1194 000 -- _- - -- - MW7 03/02/04 680 1724 -1044 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 MW8 04/11/88 778 2025 -1247 000 740 18,000 5,700 32,000 120,000 MW8 09/13/88 778 22 58 -14 80 000 470 11,000 3,900 20,000 56,000 MW8 11/16/88 7 78 2272 -1494 000 <500 9,300 3,600 16,000 63,000 MW8 02/09/89 7 78 2228 -1450 000 650 13,000 3,900 21,000 62,500 -- MW8 05/31/89 778 2395 -16 17 000 460 8,700 3,700 24,000 66,000 -- b Iprogects1739421tttasterlwp\gO3i7413942gw xis Pd6e 15 of 52