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TABLE 2 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration(pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> P 1 10/19/95 779 2478 -1699 000 84 9 7 250 180 2,700 <25 <br /> P1 02/13/96 779 22 52 -1473 000 84 <5 0 230 70 3,300 <br /> -- <br /> PI 04/18/96 779 2070 -1291 000 -- -- _- <br /> Pl 08/08/96 779 21 41 -1362 000 -- -_ __ <br /> PI 11/04/96 779 2205 -1426 000 67 <5 0 170 21 2,000 X25 <br /> P1 02/03/97 779 1750 -9 71 000 -_ -- <br /> P1 05/08/97 643 17 14 -1071 0 00 41 2 9 120 48 1,500 7 1 <br /> PI 08/26/97 643 18 82 -1239 000 -- _- -- _ <br /> P1 11/11/97 643 1936 -12 93 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> P1 03/03/98 6 43 1341 -698 000 20 1 1 91 28 940 13 <br /> P1 03/03/98 643 3 7* <br /> P1 05/20/98 643 1375 -732 000 20 <5 0 110 19 1,600 <25 <br /> PI 05/20/98 643 3 1* <br /> P1 08/19/98 643 1521 -8 78 000 16 2 5 17 1 3 250 3 0 <br /> PI 08/19/98 643 <2 0* <br /> P1 11/18/98 643 1561 -9 18 000 <br /> P1 03/30/99 643 -- -_ <br /> P1 05/05/99 643 1437 -794 000 <br /> P1 08/20/99 643 -- -- <br /> PI 12/06/99 643 - -_ -- -- -- -- -- - <br /> P1 02/29/00 643 <br /> -- -- -- --PI 05/16/00 643 <br /> -- -- -- -- -- <br /> P1 09/11/00 643 <br /> PI 12/13/00 643 -- -- -- _ -- <br /> PI 03/08/01 643 -- -- -- -- -- -- -- <br /> P1 06/21/01 643 -- <br /> PI 09/20/01 643PI 12/04/01 644 <br /> PI 03/05/02 644 -- -- -- -- - -- <br /> P1 06/11/02 644 -- -_ _- <br /> P2 01/30/91 7 87 3022 -2235 000 <br /> b kpropects\739421tnaster\wp%g0602U9421,vr x1s <br /> Page 24 of 43 <br />