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�� www �w .�� .�■.. �� war ...�■ �� ■.�.. �� s .�.� �� s�� !i +�..� • • i TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHM AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration Well Elevation to Water Elevation Thickness Ethyl- Number Date feet feet (feet) (feet) Benzene Toluene benzene Xylenes TPH-9 MTBE MW4 03/05/02 7 12 1685 -9 73 000 320 <0 5 <0 5 <0 5 316 h 760 MW4 03/05/02 712 112* MW4 06/11/02 7 12 1741 -1029 000 2 9 <0 5 <0 5 <0 5 424 h 778 MW4 06/11/02 7 12 40 6* MW4 09/10/02 712 1853 -1141 000 2 4 <0 5 <0 5 <0 5 324 h 85 0 MW4 09/10/02 7 12 94 4* MW4 12/18/02 7 12 1828 -11 16 0 00 18 <0 5 <0 5 <0 5 301 h 82 6 MW4 12/18/02 7 12 92 0* MW4 03/24103 7 12 1780 -1068 000 <0 5 <0 5 <0 5 <0 5 402 h 72 3 MW4 03/24/03 7 12 72 5* MW4 06/11/03 7 12 1793 -1091 000 230 0 6 <0 5 <0 5 372 It 68 6 MW4 06/11/03 7 12 62 6* MW4 09/17/03 7 12 1927 -12 15 000 330 <0 5 <0 5 <0 5 547 h 108 MW4 09/17/03 712 114* MW4 12/08/03 7 12 1928 -1216 000 170 <0 5 <0 5 <0 5 444 h 126 MW4 12/08/03 712 130* MW4 03/02/04 7 12 1778 -1066 000 220 <0 5 <0 5 <0 5 354 h 100 MW4 03/02/04 7 12 84 2* MW4 06/28/04 7 12 1896 -1184 0 00 -- -- -- -- -- -- MW4 3 06/29/04 7 12 -- -- -- 120 <0 5 <0 5 <0 5 380 h 99 2* MW4 09/27/04 7 12 19 83 -1271 000 -- -- -- -- -- -- MW4 3 09/28/04 7 12 -- -- -- 190 <0 5 <0 5 <0 5 406 h 96 3* MW4 12/01/04 7 12 1946 -1234 000 -- -- -- -- -- MW4 12/02/04 7 12 -- -- -- 140 <0 5 <0 5 <0 5 331 h 85 5* MW5 07/16/87 9 58 16 69 -7 11 000 <10 480 280 1,390 2,200 -- MW5 04/11/88 958 22 86 -1328 000 <2 0 25 25 85 500 -- MW5 09/13/88 958 2533 -1575 000 4 4 650 50 110 1,400 -- MW5 11/16/88 958 2531 -1573 000 <1 3 19 25 24 910 -- MW5 02/09/89 958 2509 -15 51 000 3 4 12 15 22 1,250 -- MW5 05/31/89 958 2672 -17 14 000 <0 5 14 24 46 790 -- MW5 08/17/89 9 58 28 44 -1886 000 10 29 13 12 1,200 -- MW5 12119189 959 2945 -1987 000 -- -- -- -" -- Page 11 of 56 g Ip%Deus1739421masierlw0g120413942gw xis