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� � � � II_ IIIIIIIIIIIIIR 11111111111111 Illllllllllllllf III_ IIIIIIIIIII� IIIIIIIIIII, TABLE 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- Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE I IWI 03/02/04 6 87 <0 5* IW 1 06/28/04 6 87 1859 -1172 000 -- -_ __ __ __ IW1 J 06/29/04 6 87 -- -- -- 14 3 <0 5 6 4 16 1,270 h <0 5* IW 1 09/27/04 6 87 1941 -1254 000 -- -- -- -- _- __ IWI J 09/28/04 6 87 -- -- -- 133 <0 5 5 5 12 1,220 h <0 5* IW 1 12/01/04 687 19.09 -1222 0100 -- — -- _ _ _. 1W1 12/02/04 6 87 — — — 13 7 <0 5 3 9 0 6 1,110 h <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 <I00 -- MWI 09/13/88 776 22 18 -1442 000 19 2 5 <0 5 <0 5 70 -- MWI 11/16/88 776 2307 -1531 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 -2150 000 <0 5 <0 5 <0 5 0 8 <250 -- MWI 08/17/89 7 76 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 -19 70 000 <0 5 <0 5 0 8 2 9 80 MWI 05/17/90 776 2824 -2048 000 <0 5 4 5 <0 5 <0 5 120 MWI 09/25/90 776 2959 -2183 000 <0 5 7 0 10 4 7 170 MWI 12/19/90 776 Dry __ -_ __ __ __ MWl 01/30/91 776 Dry MWI 05/02/91 776 Dry MWI 07116-17191 776 Dry MWI 10/15/91 7 76 2995 -22 19 a 000 MWI 01/28/92 7 76 2970 -2194 a 000 MWI 04/30/92 776 2926 -2150 000 MWI 08/13/92 776 2985 -2209 000 -- -- -- -- __ MWI 10/08/92 7 76 Dry MWI 02/23/93 776 2855 -2079 000 -- -- — -- _- 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 -- g 1pro)ects1739421masterlwp'gl20413942gw xis Page 3 of 58