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TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3942,4444 N PERSHING AVENUE,STOCKTON,CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration{µg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> N0 Date (ft ms]) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> M W l 2 0S/20/98 875 <2 0* <br /> 08/19/98 1758 -883 000 <05 <05 <05 <05 <50 <25 <br /> 08/19/98 <2 0* <br /> 11/18/98 1810 -935 000 -- -- -- -- -- -- <br /> 03/30/99 1630 -7 55 000 -- -- -- -- -- -- <br /> 05/05/99 1644 -769 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> 08/20/99 -- -- -- <br /> 12/06/99 - -- -- -- -- -- -- -- <br /> 02/29/00 -- -- <br /> 05/16/00 1628 -753 000 -- -- -- -- -- -- <br /> M W]3 05/18/93 949 33 75 -2426 000 1 1 <0 5 <0 5 <1 71 -- <br /> 08/22/93 35 05 -25 56 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 12/30/93 33 29 -23 80 000 <0 5 <0 5 <0 5 <0 5 <50 <br /> 02/17/94 32 73 -2324 000 2 3 <0 5 <0 5 0 5 <50 -- <br /> 05/10/94 3200 -2251 000 1 1 <0 5 <0 5 <0 5 110 -- <br /> 08/02/94 33 30 -23 81 000 13 6 8 5 9 35 620 -- <br /> 11/0 1/94 33 97 -2448 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 02/17/95 31 76 -2227 000 <0 5 <0 5 <0 5 <0 5 <50 <br /> M/1 1/95 28 90 -1941 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 08/24/95 2958 -2009 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 10/19/95 2997 -2048 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 02/13/96 27 85 -1836 000 <0 5 <0 5 <0 5 <0 5 <50 -- <br /> 04/]S/96 25 27 -15 78 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 08/08/96 2600 -16 51 000 -- -- -- -- -- -- <br /> 11/04/96 2636 -1687 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 02/03/97 22 20 -12 71 000 -- -- -- -- -- -- <br /> 05/08/97 8 08 2087 -1279 000 -- -- -- -- -- -- <br /> 08/26/97 22 69 -1461 000 -- -- -- -- -- -- <br /> 11/11/97 2320 -15 12 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> 1 prolec1s173942timasteri%%p,Q)00\3942,a \Is Page 19of37 <br />