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(ABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration ( /L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) _.(feet) (feet) Benzene Toluene benzene Xylenes TPH-� MTBE <br /> MW9 05/20/98 6 57 20* <br /> MW9 08/19/98 657 15 50 -893 000 081 68 <0 5 <0 5 340 45 <br /> MW9 08/19/98 657 44* <br /> MW9 11/18/98 657 1573 -916 000 <05 <05 <05 <05 310c 18 <br /> MW9 03/30/99 657 13 85 -728 000 <br /> MW9 05/05/99 657 1423 -766 000 <0 5 <0 5 <0 5 <0 5 93 1 5 12 <br /> MW9 08/20/99 6 57 1569 -9 12 000 <br /> MW9 12/06/99 657 15 83 -926 000 <br /> MW9 02/29/00 657 13 33 -676 000 <1 <1 <1 <1 <50 4 8 <br /> MW9 05/16/00 657 13 39 -682 000 <br /> MW9 09/11/00 657 -- -- -- -- -- <br /> MW9 12/13/00 6 57 <br /> MW9 03/08/01 657 1472 -8 15 000 <0 5 <0 5 <0 5 <0 5 <50 7 6 <br /> MW9 06/21/01 657 16 14 -957 000 <0 5 <0 5 <0 5 <0 5 110 17 <br /> MW9 06/21/01 657 19* <br /> MW9 09/20/01 657 17 17 -1060 000 <br /> NIW9 12/04/01 6 52 1685 -1033 000 <br /> MW 10 04/11/88 861 23 18 -1457 000 640 130 170 140 3,100 -- <br /> MW 10 09/13/88 861 25 85 -1724 000 4,800 130 340 240 7,700 -- <br /> M W 10 11/16/88 8 61 2608 -1747 000 5,800 290 700 340 9,400 -- <br /> MW10 02/09/89 8 61 25 70 -1709 000 7,500 450 220 320 8,800 -- <br /> MWIO 05/31/89 861 2744 -1883 000 11,000 320 1,600 800 24,000 -- <br /> MW10 08/17/89 861 2945 -2084 000 12,000 2,100 3,100 2,500 35,000 -- <br /> M W 10 03/21/90 8 61 Not accessible <br /> MW10 05/17/90 861 Not accessible <br /> MW l O 06/27/90 861 3252 -2391 000 9,700 4,800 2,400 5,300 51,000 -- <br /> MW10 09/25/90 861 3395 -2534 000 13,000 9,900 2,700 8,900 71,000 -- <br /> M W 10 12/19/90 861 33 79 -25 18 000 16,000 16,000 3,300 11,000 81,000 -- <br /> MW10 01/30/91 8 61 3424 -25 63 000 18,000 15,000 2,600 9,900 62,000 -- <br /> MW 10 05/02/91 861 3424 -25 63 000 6,900 5,700 2,100 5,900 27,000 -- <br /> M`V l0 67116-17191 8 61 35 13 -26 52 a 000 <br /> %pioJLcts1739421m,isierl»plyi20113942gx+ xls Page 16 of 40 <br />