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TABLE I 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 /> I <br /> MW4 12/06/99 7 18 1655 -937 000 <1 <1 1 8 4 7 330 89 <br /> 02/29/00 14 12 -694 000 4 3 <1 <1 <1 100 7 <br /> 05/16/00 1414 -696 000 1 9 <1 <1 <1 190 6 9 <br /> 09/11/00 1649 -931 000 <0 5 <0 5 <0 5 <0 5 330 7 2 <br /> MW5 07/16/87 958 1669 -7 11 000 <10 480 280 1,390 2,200 -- <br /> 04/11/88 2286 -13 28 000 <2 0 25 25 85 500 -- <br /> 09/13/88 2533 -1575 000 4 4 650 50 110 1,400 -- <br /> 11/16/88 25 31 -15 73 000 <1 3 19 25 24 910 -- <br /> 02/09/89 2509 -15 51 000 3 4 12 15 22 1,250 -- <br /> 05/31/89 2672 -17 14 000 <0 5 14 24 46 790 -- <br /> 08/17/89 2844 -1886 000 10 29 13 12 1,200 -- <br /> 12/19/89 2945 -1987 000 -- -- _- __ <br /> Well dry since 03/21/90 <br /> 12/30/93 2990 -2032 000 <br /> 02/17/94 2954 -1996 000 <br /> 05/10/94 29 13 -1955 000 <br /> 08/02/94 Weil dry <br /> 11/01/94 Well dry <br /> 02/17/95 2841 -18 83 000 -- __ __ __ __ <br /> 05/11/95 2572 -16 14 000 1 4 1 2 7 5 4 8 350 -- <br /> 08/24/95 2335 -1377 000 <0 5 <0 5 072 1 5 85 -- <br /> 10/19/95 2720 -1762 000 <0 5 <0 5 1 1 1 1 85 <2 5 <br /> 02/13/96 Well dry __ __ __ __ _- -- <br /> 04/18/96 2200 -1242 000 <0 5 <0 5 <0 5 0 68 65 <2 5 <br /> 08/08/96 2422 -1464 000 -- -- _- __ __ -- <br /> 11/04/96 2468 -15 10 000 -- -- -- -_ __ _- <br /> 02/03/97 19 89 -1031 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/08/97 863 1943 -1080 000 <0 5 <0 5 <0 5 <0 5 56 <2 5 <br /> 08/26/97 2019 -11 56 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> It/11197 Well dry __ __ __ -- __ __ <br /> DpiojectsY739421Luaylerktp1g900139426w As Pabe 8 of 37 <br />