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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 (pglL) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet ms1) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> MW 11 08/13/92 1015 3994 -2979 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/08/92 10 15 4070 -3055 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 02/23/93 10 15 3728 -27 13 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 05/18/93 1015 -- -- <br /> 08/22/93 1015 36 19 -2604 000 <br /> 12/30/93 10 15 Not accessible -- __ -- <br /> 11/11/97 <br /> -l1/11197 10 15 2483 -1468 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 11/11/97 10 15 <2 0* <br /> 03/03/98 10 15 2011 -996 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/03/98 10 15 <2 0* <br /> 05/20/98 10 15 1858 -843 000 <0 5f <0 5f <0 5f <0 5f <50f <2 5f <br /> 05/20/98 10 15 <2 0* <br /> 08/19/98 10 15 1994 -979 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/19/98 10 15 <2 0* <br /> 11/18/98 10 15 2028 -10 13 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 03/30/99 10 15 1826 -8 11 000 __ __ __ __ <br /> 05/05/99 10 15 1848 -833 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 1015 -- -- __ __ <br /> 12/06/99 10 15 2037 -1022 000 -- -- __ __ <br /> 02/29/00 10 15 1829 -8 14 000 <1 <1 <1 <1 <50 <1 <br /> 05/16/00 10 15 1849 -834 000 -- -- _- _- <br /> 09/11/00 1015 -- -- -- -- <br /> 12/13/00 1015 <br /> 03/08/01 1015 <br /> 06/21/01 1015 -- -- __ -_ <br /> MW12 01/30/91 9 16 35 39 -2623 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> �prnje4ts173932Uiiasteri"T1g6OIU932gw xis <br /> Pae 21 of 4G <br />