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�. s � .�■� �. � a� 11�■s � � � � li l� a� w I ABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA Casing Depth Groundwater LPH Concentration /L) Well Elevation to Water Elevation Thickness Ethyl- Nunfbei Date (feet) (feet) (feet) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE MW3 02/17/94 9 14 28 92 -1978 000 MW3 05/10/94 9 14 29 14 -2000 000 MW3 08/02/94 9 14 Well dry MW3 11/01/94 914 Well dry MW3 02/17/95 9 14 Well dry -- -- __ -- -- MW3 _MW3 05/11/95 9 14 25 59 -1645 000 97 24 42 1,300 5,600 -- MW3 08/24/95 9 14 2449 -15 35 000 45 5 9 19 440 2,600 -- MW3 10/19/95 9 14 Well dry -- -- -- __ _- MW3 02/13/96 914 2529 -1615 000 270 68 81 210 2,200 -- MW3 04/18/96 9 14 1940 -1026 000 80 9 5 25 45 1,000 17 M W 3 08/08/96 9 14 24 05 -1491 000 -- -- -- _- -- m W.3 _MW3 11/04/96 9 14 24 05 -1491 000 -- -- -- __ __ -- m W 1) _MW3 02/03/97 9 14 19 63 -1049 000 180 4 6 48 110 1,400 24 MW3 05/08/97 8 54 1942 -1088 000 -- -- -- __ __ MW3 08/26/97 8 54 21 20 -1266 000 MW3 11/11/97 854 Well dry -- _- __ -- -- -- MW3 03/03/98 854 16 16 -7 62 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW3 03/03/98 854 <2 0* M W3 05/20/98 854 1602 -748 000 14 <0 5 <0 5 <0 5 170 <2 5 MW3 05/20/98 854 <2 0* MW3 08/19/98 854 1748 -894 000 5 9 2 2 <0 5 063 280 2 6 MW3 08/19/98 8 54 <2 0* NIW3 11/18/98 854 1793 -939 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MW3 03/30/99 854 -- -- -- __ __ __ __ -- MW3 -MW3 05/05/99 854 1640 -786 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 MW3 08/20/99 854 1785 -931 000 -- -- _- __ __ -- m W3 12/06/99 854 1802 -948 000 MW3 02/29/00 854 15 67 -7 13 000 MW3 05/16/00 854 15 62 -708 000 -- -- -_ __ -_ MW3 09/11/00 8 54 1798 -944 000 7 3 84 5 9 115 220 <0 5 MW3 12/13/00 854 1760 -906 000 3 4 11 1 8 83 90 <0 5 MW3 03108/01 854 1706 -852 000 <0 5 <0 5 <0 5 <0 5 210 <0 5 ,1pioiecta1739421nsaateruvl}581201139 42Ku r1s Page 6 of 40