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TABLE 5 <br /> HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS - <br /> November 1990 Through January 2007 <br /> Former Balk Plant 0788 <br /> Date TOC Depth to LPH Ground- Change TPH-D TPH-G TPH-G Benzene Toluene Ethyl- Total MTBE Comments <br /> Sampled Elevation Water Thickness water in (8015M) (GC/MS) benzene Xylenes (8260B) <br /> Elevation Elevation - <br /> (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (pg/1) (µg/1) (µg/1) (µg(1) (110) (µg/1) <br /> UA continued <br /> 01/11/93 44.14 - 0.00 -- -- ND -- ND ND ND ND ND - <br /> 05/26/93 44.14 7.81 0.00 36.33 -- 90 -- ND ND ND ND ND -- <br /> 08/24/93 44.14 7.94 0.00 36.20 -0.13 ND -- ND ND ND ND ND -- <br /> 11/30/93 43.76 7.97 0.00 35.79 -0.41 ND - ND ND ND ND ND -- <br /> 02/18/94 43.76 7.70 0.00 36.06 0.27 ND - ND ND ND ND ND - <br /> 05/12/94 43.76 7.29 0.00 36.47 - 0.41 ND - ND ND ND ND ND -- <br /> 08/08/94 43.76 7.18 0.00 36.58 0.11 ND - ND ND ND ND ND - <br /> 11/08/94 43.76 8.40 0.00 35.36 -1.22 ND -- ND ND ND ND ND -- <br /> 02/13/95 43.76 8.08 0.00 35.68 0.32 ND -- ND ND ND ND ND -- <br /> 10/10/95 43.76 8.21 0.00 35.55 -0.13 -- -- - -- - -- - -- Sampled annually <br /> 02/13/96 43.76 7.56 - 0.00 36.20 0.65 ND -- ND ND ND ND ND -- <br /> 11/06/96 43.76 7.08 0.00 36.68 0.48 -- - -- - - -- -- - <br /> 05/06/97 43.76 6.04 0.00 37.72 1.04 ND - ND ND ND ND ND - • <br /> 0429/98 43.76 7.87 0.00 35.89 -1-83 130 - ND ND ND ND ND ND <br /> 12/01/98 43.76 8.00 0.00 35.76 -0.13 - - -- -- -- - -- - <br /> 0524/99 43.76 7.28 0.00 36.48 0.72 ND - ND ND ND ND ND ND <br /> 11/08/99 43.76 8.22 0.00 35.54 -0.94 - -- - -- -- -- - - <br /> 11/03/04 47.76 8.58 0.00 39.18 3.64 ND<50 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 <br /> 03/31/05 47.76 8.23 0.00 39.53 0.35 ND<50 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 <br /> 03/06/06 47.76 8.53 0.00 39.23 -0.30 ND<50 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 <br /> 06/07/06 47.76 4.77 0.00 42.99 3.76 ND<26 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 <br /> 0828/06 47.76 5.66 0.00 42.10 -0.89 ND<50 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 <br /> 10/16/06 47.76 8.40 0.00 39.36 -2.74 630 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 <br /> 01/24/07 47.76 8.55 0.00 3921 -015 ND<50 - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 <br /> 0788 Page 12 of 14 <br />