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i • • <br /> TABLE 1 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 /> No Date (feet msl) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> P1 11/04/96 779 2205 -1426 000 67 <5 0 170 21 2,000 <25 <br /> 02/03/97 1750 -971 000 -- -- -- <br /> 05/08/97 643 17 14 -1071 000 41 2 9 120 48 1,500 7 1 <br /> 08/26/97 1882 -1239 000 -- -_ <br /> 11/11/97 1936 -1293 000 <05 <05 <05 <05 <50 <25 <br /> 03/03/98 1341 -698 000 20 1 1 91 28 940 13 <br /> 03/03/98 3 7* <br /> 05/20/98 13 75 -732 000 20 <5 0 110 19 1,600 <25 <br /> 05/20/98 <br /> 31* <br /> 08/19/98 1521 -878 000 16 2 5 17 1 3 250 3 0 <br /> 08/19/98 <2 0* <br /> 11/18/98 15 61 -9 18 000 -- __ <br /> 03/30/99 _- _- <br /> 05/05/99 1437 -794 000 <br /> 08/20/99 -- -- <br /> 12/06/99 -- -- -- -- -- -- <br /> 02/29/00 -- <br /> -- -- -- -- -- <br /> 05/16/00 <br /> 09/11/00 -- __ -- -- -- _ -- -- <br /> P2 01/30/91 7 87 3022 -2235 000 -- __ <br /> 05/02/91 30 13 -2226 000 140 13 650 610 5,400 -- <br /> 07/16-17/91 3105 -23 18 000 61 <5 300 220 5,200 -- <br /> 10/15/91 31 64 -2377 000 20 8 2 90 63 1,500 -- <br /> 01/28/92 2993 -2206 000 53 24 170 120 2,900 -- <br /> 04/30/92 2951 -2164 000 52 <2 5 160 120 2,000 -- <br /> 08/13/92 31 53 -23 66 000 45 12 100 76 2,100 -- <br /> 10/08/92 32 17 -2430 000 34 20 60 80 2,000 -- <br /> 02/23/93 2879 -20 92 000 58 3 0 44 34 1,000 -- <br /> 05/18/93 2739 -1952 000 65 20 81 58 1,400 -- <br /> 08/22/93 2763 -1976 000 50 2 4 69 53 1,400 -- <br /> fiproiecrel73942%masier1wp1g9OOU942Lw xis Pabe 21 o€37 <br />