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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 ms]) (feet) (feet msl) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW 12 10/08/92 9 16 3754 -2838 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 02/23/93 3445 -2529 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 05/18/93 Not Accessible __ -- <br /> 08/22/93 Not Accessible <br /> 12/30/93 Not Accessible <br /> 02/17/94 Not Accessible __ __ <br /> 05/10/94 3105 -2189 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 08/02/94 32 55 -23 39 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 11/01/94 3303 -23 87 000 <0 5 <0 5 <0 5 <0 5 <50 <br /> 02/17/95 3057 -2141 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 05/11/95 2765 -1849 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 08/24/95 2851 -1935 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/19/95 2888 -1972 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 02/13/96 2665 -1749 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 04/18/96 24 12 -1496 000 -- __ _- <br /> 08/08/96 2493 -15 77 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 11/04/96 25 31 -16 15 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 02/03/97 21 03 -11 87 000 -- -- -_ <br /> 05/08/97 875 2000 -11 25 000 <br /> 08/26/97 21 63 -1288 000 -- -- __ <br /> 11/11/97 2228 -13 53 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 1705 -830 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 <br /> <2 0* <br /> 05/20/98 1623 -748 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 05/20/98 <2 0* <br /> 08/19/98 1758 -883 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 <br /> <2 0* <br /> 11/18/98 18 10 -935 000 -- _- -- __ <br /> 03/30/99 1630 -755 000 -- __ __ <br /> 05/05/99 1644 -769 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08(20199 -- -_ <br /> f lprojects1739421masierlwp)g9DUY39426w xls Pa6e IS of 37 <br />