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�. ..� .tet � �■. ...t 1.1 ... ww ■w w w w TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA I Casing Depth Groundwater LPH Concentration ( /L) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE MW6 09/17/03 744 Well dry -- __ -_ __ MW7 07/16/87 835 18 11 -976 000 78 35 32 678 1,000 - MW7 04/11/88 835 2121 -1286 000 26 <2 0 10 <40 1,200 -- MW7 835 Well dry since 07/12/88 MW7 835 Not accessible since 12/30/93 MW7 05/11/95 8 35 Well dry -- MW7 08/24/95 8 35 Well dry MW7 10/19/95 835 Well dry MW7 02/13/96 835 Well dry -- MW7 04/18/96 835 Well dry MW7 08/08/96 8 35 2160 -1325 000 MW7 11/04/96 8 35 2250 -14 15 000 -- -- __ __ __ _ MW7 02/03/97 835 1758 -923 000 <0 5 <0 5 <0 5 <0 5 71 <2 5 MW7 05/08/97 685 1731 -1046 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 08/26/97 6 85 2009 -1324 000 -- __ __ -- MW7 _MW7 11/11/97 6 85 Well dry __ __ __ __ -- MW7 _MW7 03/03/98 6 85 13 85 -700 000 <0 5 <0 5 <0 5 <0 5 79c <2 5 MW7 03/03/98 6 85 <2 0* MW7 05/20/98 685 l 3 98 -7 13 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 05/20198 685 <2 0* MW7 08/19/98 695 1543 -858 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 08/19/98 6 85 <2 0* MW7 11/18/98 685 1582 -897 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW7 03/30/99 6 85 -- -- __ __ MW7 05/05/99 685 1433 -748 000 <0 5 <0 5 <0 5 0 637 542 <2 0 MW7 08/20/99 6 85 1575 -890 000 -- -- -- __ __ -- MW7 12/06/99 6 85 1597 -9 12 000 <1 <1 <1 <1 92 <1 MW7 02/29/00 6 85 1351 -666 000 16 <1 <1 <1 64 <1 MW7 05/16/00 6 85 13 65 -680 000 <1 <1 <1 <1 <50 <1 MW7 09/11/00 6 85 1592 -9 07 000 <0 5 <0 5 <0 5 <0 5 53 <0 5 MW7 12/13/00 695 15 83 -899 000 076 28 063 309 <50 <0 5 MW7 03/08/01 6 85 14 97 -8 12 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW7 06/21/01 685 1633 -948 000 <05 <05 <05 <05 <50 <05 g 1pwjeus1739421m isiLAm[AgO9p313942gu xis Page 13 of 47 I