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Table 1 Historical Product Measurement and Thickness <br /> Union Pacific Railroad Company <br /> Former Tracy Maintenance Facility <br /> Tracy,California <br /> Depth to Product Product <br /> Well Date Product Depth to Water Thickness Volume <br /> Identification Measured (feet btc) (feet btc) (inches) (gal) Comments <br /> PZ-10 9/9/2005 ND 10.67 0.0 0.0 <br /> PZ-10 9/26/2005 ND 10.94 0.0 0.0 <br /> PZ-10 10/12/2005 ND 11.05 0.0 0.0 <br /> PZ-10 10/28/2005 ND 11.15 0.0 0.0 <br /> PZ-10 11/7/2005 ND 11.26 0.0 0.0 <br /> PZ-10 11/30/2005 ND 11.31 0.0 0.0 <br /> PZ-10 12/16/2005 ND 11.50 0.0 0.0 <br /> PZ-10 12/29/2005 ND 11.13 0.0 0.0 <br /> PZ-10 1/9/2006 ND 10.82 0.0 0.0 <br /> PZ-10 1/31/2006 ND 11.09 0.0 0.0 <br /> PZ-10 2/14/2006 ND 11.30 0.0 0.0 <br /> PZ-10 2/21/2006 ND 11.29 0.0 0.0 <br /> PZ-10 3/8/2006 ND 11.21 0.0 0.0 <br /> PZ-10 3/23/2006 ND 11.06 0.0 0.0 <br /> PZ-10 4/17/2006 ND 10.80 0.0 0.0 <br /> PZ-10 4/27/2006 ND 11.02 0.0 0.0 <br /> PZ-10 5/10/2006 ND 11.16 0.0 0.0 <br /> PZ-10 5/26/2006 ND 10.88 0.0 0.0 <br /> PZ-10 6/13/2006 ND 9.81 0.0 0.0 <br /> TW-01 3/16/95 NA 9.18 sheen 0.000 No measurable product-sheen only. <br /> TW-01 4/06/95 9.40 9.45 0.60 0.03 Product removed by bailer. <br /> TW-01 4/17/95 NA 9.60 sheen 0.000 No measurable product-sheen only. <br /> TW-01 5/15/95 NA 9.78 sheen 0.000 Product removed by bailer. <br /> TW-01 6/26/95 NA 8.86 0.00 0.00 No sheen <br /> TW-01 7/11/95 NA NM sheen 0.000 No measurable product-sheen only. <br /> TW-01 7/25/95 NA 9.75 0.00 0.00 No measurable product. <br /> TW-01 9/06/95 NA 9.65 0.00 0.00 No measurable product- <br /> TW-01 9/30/95 NA 10.50 0.00 0.00 No measurable product- <br /> TW-01 10/30/95 NA 10.13 0.00 0.00 No measurable product. <br /> TW-01 11/28/95 10.22 10.28 0.72 0.04 Product removed by bailer. <br /> TW-01 12/27/95 NA 9.42 0.00 0.00 Install Nochar bilge bags. <br /> TW-01 1/25/96 NA 9.38 0.00 0.00 Some diesel visible on bilge bag. <br /> Product visible in bilge bag;no measurable product <br /> TW-01 2/22/96 NA 8.50 0.00 0.00 in well. <br /> Bilge bags weighed but not remove and replaced. <br /> TW-01 3/15/96 - - - - Calculated weight of diesel removed was 0.37 lb. <br /> TW-01 4/02/96 NA 9.01 0.00 0.00 No measurable product. <br /> TW-01 5/13/96 NA 8.69 0.00 0.00 No measurable product. <br /> TW-01 7/15/96 NA 8.82 0.00 0.00 No measurable product. <br /> No measurable product. Remove and replace bilge <br /> TW-01 11/14/96 NA 8.85 0.00 0.00 bag. <br /> TW-01 2/11/97 NA 8.00 0.00 0.00 No measurable product. <br /> TW-01 5/22/97 NA 8.00 0.00 0.00 No measurable product. <br /> TW-01 7/28/97 NA 8.47 0.00 0.00 No measurable product. <br /> TW-01 10/31/97 NA 9.48 sheen 0.000 No measurable product-sheen only. <br /> TW-01 2/12/98 NM NM NM NM Well flooded. No measurement taken. <br /> TW-01 5/11/98 NA 7.95 0.00 0.00 No measurable product. Bilge bag not remove and <br /> TW-01 7/27/98 NA 8.35 0.00 0.00 No measurable product. <br /> TW-01 12/01/98 NA 9.41 0.00 0.00 No measurable product. <br /> TW-01 2/2/1999 8.95 8.96 0.12 0.01 Measure product. <br /> TW-01 5/11/1999 9.24 9.25 0.12 0.01 Measure product. Remove and replace bilge bag. <br /> No measurable product. Remove and replace bilge <br /> TW-01 8/10/1999 NA 8.48 0.00 0.00 bag. <br /> TW-01 11/17/1999 9.91 9.99 0.96 0.05 Measure product. Remove and replace bilge bag. <br /> TW-01 2/7/2000 NA 10.71 0.00 0.00 No measurable product. <br /> TW-01 5/9/2000 6.7 6.71 0.12 0.01 Measure product. Remove and replace bilge bag. <br /> TW-01 8/8/2000 9.56 10.1 6.48 0.35 Measure product. Remove and replace bilge bag. <br /> TW-01 11/8/2000 11.55 11.92 4.44 0.24 Measure product. Install new bilge bag. <br /> TW-01 2/12/2001 ND 11.67 0.0 0.00 Measure product. Remove bilge bag. <br /> TW-01 5/9/2001 9.81 9.87 0.7 0.04 <br /> TW-01 8/13/2001 9.60 9.65 0.6 0.03 <br /> ERM Page 10 of 16 UPRR/0020500.56-8/24/2006 <br />