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TABLE 1 (continued) <br /> Casing Depth Groundwater LPH Concentration (µg/L.) <br /> Well EIevation to Water Elevation Thickness Ethyl- <br /> No Date (ft msl) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> SW2 02/17/94 2870 -- 000 660 2,000 770 3,600 29,000 <br /> Not accessible since 02/17/94 <br /> 02/17/95 2757 Air sparging well-- samples not collected <br /> 05/11/95 2484 Air sparging well --samples not collected <br /> 08/24/95 -- Air sparging well --samples not collected <br /> 10/19/95 -- Air sparging well --samples not collected <br /> 02/13/96 -- Air sparging well --samples not collected <br /> 04/18/96 -- Air sparging well--samples not collected <br /> 08/08/96 -- Air sparging well-- samples not collected <br /> 11/04/96 2372 -- 000 110 <1 2 <1 2 20 320 <6 2 <br /> 02/03/97 -- -- -- -• -- -- -- -- <br /> V1 <br /> -V1 05/02/91 8 57 31 74 -23 17 000 20,000 49,000 4,700 25,000 130,000 -- <br /> 07116-17191 3270 -24 13 000 14,000 44,000 3,000 15,000 170,000 -- <br /> 10/15/91 3325 -2468 000 18,000 51,000 4,200 23,000 200,000 -- <br /> 01/28/92 3151 -2294 Sheen 20,000 58,000 2,400 23,000 150,000 -- <br /> 04/30/92 31 12 -2255 000 15,000 43,000 3,000 18,000 130,000 -- <br /> 08/13/92 33 17 -24 60 000 12,000 44,000 3,600 20,000 180,000 -- <br /> 10/08/92 3376 -25 18 0 01 Not sampled-LPH <br /> 02/23/93 3047 -2190 000 9,800 19,000 3,700 18,000 100,000 -- <br /> 05/18/93 -- -- -- -- -- -- -- -- <br /> 08/22/93 2970 -21 13 000 -- -- -- -- -- <br /> 12/30/93 2905 -2048 000 -- -- -- -- -- _- <br /> 02/17/94 2873 -2016 000 -- -- -- -- -- <br /> 05/10/94 2833 -1976 000 8,200 37,000 3,600 17,000 110,000 -- <br /> 08/02/94 -- -- -- -- -- -- -- -- <br /> 11101/94 3005 -2148 000 -- -- -- -- -- <br /> XLS73942Q297 T1 1 Page 21 <br />