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..� � �.. a� � >� � � � 1111 � 1• � � � � � TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration well Elevation to Water Elevation Thickness Ethyl- Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE IWI 03/02/04 687 <0 5* 1W1 06/28/04 6.87 1859 -11.72 0.00 — _ _ _ IWl 1 06/29/04 687 — -- -- 143 <0 5 6.4 16 1,270 It <0 5* MWI 01/87 776 -- -- <1 <1 -- <1 <50 MWI 07/16/87 776 -- -- -- <0 5 15 <0 5 <0 50 <100 MWI 04/11/88 776 2051 -1275 000 <0 5 <0 5 <0 5 <0 5 <100 MWI, 09/13/88 776 2218 -1442 000 19 2 5 <0 5 <0 5 70 MWI 11/16/88 776 23 07 -15 31 000 <0 5 95 <0 5 <0 5 130 MWI 02/09/89 776 2264 -1488 000 17 0 2 0 2 0 6 <250 MWI 05/31/89 776 2926 -21 50 000 <0 5 <0 5 <0 5 0 8 <250 MWI 08/17/89 776 2587 -18 11 000 <0 5 <0 5 <0 5 <0 5 <250 MWI 12/19/89 776 2922 -2146 000 <0 5 19 <0 5 <0 5 <250 -- MWI 03/21/90 776 2746 -1970 0 00 <0 5 <0 5 08 29 80 MWI 05/17/90 776 2824 -2048 000 <0 5 4 5 <0 5 <0 5 120 MWI. 09/25/90 776 2959 -21 83 000 <0 5 7 0 10 4 7 170 MWI. 12/19/90 776 Dry -- -- _- -_ -- MWI 01/30/91 776 Dry MWI 05/02/91 776 Dry MWI 07116-17/91 776 Dry MWI 10/15/91 776 2995 -22 19 a 000 MWI. 01/28/92 776 2970 -21 94 a 000 MWI. 04/30/92 776 2926 -2150 0 00 MWI 08/13/92 776 29 85 -2209 000 MWI 10/08/92 776 Dry MWI 02/23/93 776 2855 -2079 000 -- -- -_ __ -- MWI _MW1 05/18/93 776 27 12 -1936 000 19 <0 5 28 18 950 MWI 08/22/93 776 2734 -1958 000 8 9 <0 5 <0 5 <0 5 710 - MWI 12/30/93 776 2678 -1902 000 12 <0 5 19 7 7 390 MWI 02/17/94 776 2647 -1871 000 <0 5 13 <0 5 <0 5 130 MWI 05/10/94 776 2612 -1836 000 <0 5 13 0 6 0 6 510 MWI 08/02/94 776 2759 -1983 000 <0 5 3 5 17 5 2 780 -- g tipropects\739421masterlwp\g070413942gw xls Page 3 of 54