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TABLE 1 (continued) <br /> Casing Depth Groundwater LPH Concentration(pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (ft msl) (ft} (ft msl) (ft) Benzene Toluene benzene Xylenes TAH-g MTBE <br /> SWI 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 2424 -- 000 2,400 3,100 290 2,800 25,000 X250 <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 /> 08124/95 -- 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 X1.2 2.0 320 <6 2 <br /> I <br /> VI 05/02/91 857 31 74 -23 17 000 20,000 49,000 4,700 25,000 130,000 -- <br /> 07/16-17/91 3270 -24 13 000 14,000 44,000 3,000 15,000 170,000 -- <br /> 10/15/91 33 25 -2468 000 18,000 51,000 4,200 23,000 200,000 -- <br /> 01/28/92 31 51 -22 94 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 -2460 000 12,000 44,000 3,600 20,000 180,000 -- <br /> 10/08/92 33 76 -25 18 001 Not sampled - LPH <br /> 02/23/93 3047 -21 90 000 9,800 19,000 3,700 18,000 100,000 -- <br /> 05/18/93 -- -- -_ -- -- -- -- <br /> 08/22/93 2970 -21 13 000 <br /> X LS73942Q 1196 T 12 <br /> Page 20 <br />