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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 /L} <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> Number Date (feet) (feet) feet <br /> ---------- — f (f <br /> } ( ) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> P1 05/08/97 643 1714 -1071 000 41 2 9 120 48 1,500 7 1 <br /> P 1 08/26/97 643 1882 -1239 000 -- -- __ _- <br /> P 1 11/11/97 643 1936 -12 93 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> PI 03/03/98 643 1341 -698 000 20 1 1 91 28 940 13 <br /> P1 03/03/98 643 3 7* <br /> P1 05/20/98 643 13 75 -732 000 20 <5 0 110 19 1,600 <25 <br /> Pi 05/20/98 643 3 1* <br /> 111 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 15 61 -9 18 000 -- -- __ __ <br /> P 1 03/30/99 643 -- -- -- <br /> PI <br /> -P1 05/05/99 643 1437 -794 000 <br /> P1 08/20/99 6 43 -- -- -- <br /> 111 <br /> -P1 12/06/99 643 <br /> P1 02/29/00 643 <br /> P1 05/16/00 643 <br /> 111 09/11/00 6 43 -- -- -- -- __ -- -- -- <br /> PI 12/13/00 643 <br /> PI 03/08/01 643 -- -- -- -- -- -- __ -- <br /> P1 06/21/01 643 <br /> Pi 09/20/01 643 <br /> 111 12/04/01 644 -- -- -- <br /> P2 01/30/91 7 87 3022 —2235 000 -- -- __ __ <br /> P2 05/02/91 787 30 13 —2226 000 140 13 650 610 5,400 e -- <br /> P2 07/16-17191 7 87 3I 05 —23 18 000 61 <5 300 220 5,200 -- <br /> P2 10/15/91 787 31 64 —2377 000 20 8 2 90 63 1,500 -- <br /> P2 01/28/92 7 87 29 93 —2206 000 53 24 170 120 2,900 -- <br /> P2 04/30/92 787 29 51 —2164 000 52 <2 5 160 120 2,000 -- <br /> P2 08/13/92 7 87 3153 —2366 000 45 12 100 76 2,100 -- <br /> P2 10/08/92 7 87 32 17 -2430 000 34 20 60 80 2,000 -- <br /> 112 02123193 787 2879 -2092 000 58 3 0 44 34 1,000 -- <br /> proj"ts1739}2lmaster n pry l 2i)113942gu als Page 23 of 40 <br />