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r � Table B-Historical Diesel Thickness Measurements and Product Recovery Data (6/18/99 through 11/9/05) Date 'Recovery Depth toDepth to Diesel Cumulative Operations and Maintenance Notes Well Floating Groundwater Thickness Diesel Diesel Removed (gallons) RW-I - 11.61 - Checked passive skimmers in RW-2 and RW-3, both were empty. Recovered RW-2 13.33 13.43 0.10 20.68 approximately 0.007 and 0.08 gallons of product from RW-2 and RW-3,respectively, 5/6/05 RW-3 13.15 13.69 0.54 20.15 with disposable bailers. Recovered a trace of product from RW-4 with a disposable RW-4 13.69 13.70 0.01 99.05 bailer. The active skimmer was disabled due to titin product layer in RW-4 and RW-5 - 11.96 - insufficient fluid column in RW-3.Approximately 36.0 gallons of product measured in RW-6 12.85 2.62 recovery barrel. RW-1 12.28 Recovered approximately 0.002 and 0.09 gallons of product from passive skimmers in RW-2 13.27 13.32 0.05 20.68 RW-2 and RW-3,respectively.Recovered a trace amount of product from RW-4 using a RW-3 13.12 13.61 0.49 20.24 5/12/05 disposable bailer.The active skimmer was disabled due to tl»u product layer un RW-4 RW-4 12.57 12.66 0.09 99.05 and insufficient fluid column in RW-3.Approximately 36.2 gallons of product measured RW-5 - 12.29 - in recovery barrel. RW-6 12.87 2.62 RW-1 - 12.52 - Initial measured product recovery tank volume approximately 28.5 gallons.Recovered RW-2 13.34 13.39 0.05 20.69 an estimated 3.04 gallons of product from RW-2,RW-3,and RW-4 using a combination 5/20/05 RW-3 13.21 14.03 0.82 20.69 of passive skimmers in RW-2 and RW-3.Reinstalled passive skimmers RW-2 and RW- RW-4 12.30 15.18 2.88 93.93 3.Active skimmer was not turned on due to malfunctioning solenoid.Called to have RW-5 - 12.37 - product tank emptied. Ending measured recovery tank volume approximately 31.5 RW-6 12.94 12.95 2.62 gallons. RW-1 - 12.59 - RW-2 13.50 13.51 0.01 20.81 Initial measured product recovery tank volume approximately 31.5 gallons.Recovered 5/27/05 RW-3 13.40 13.69 0.29 20.94 approximately 0.60 gallons from RW-2, RW-3, and RW-4 using a combination of RW-4 12.69 13.05 0.36 94.16 passive skimmers and bailing.Ending measured recovery tank volume approximately RW-5 - 12.42 - 32.1 gallons.Active skimmer was left off. RW-6 13.02 13.03 0.01 2.62 RW-1 - 12.67 - RW-2 13.58 13.59 0.01 20.82 Initial measured product recovery tank volume approximately 32.1 gallons.Recovered a 6/1/05 RW-3 13.51 13.87 0.36 21.43 total of approximately I.0 gallon from RW-2,RW-3,and RW-4 from passive skimming RW-4 12.74 13.25 0.51 94.67 and bailing.Ending measured recovery tank volume approximately 33.1 gallons.Active RW-5 - 12.48 - skimmer left off until recovery tank is replaced. RW-6 13.09 13.10 0.01 2.62 RW-1 Initial measured product recovery tank volume approximately 33.1 gallons.Technician RW-2 20.83 did not have interface probe to measure product thicknesses.Recovered a combined 6/10/05 RW-4 95.68 total from RW-2,RW-3,and RW-4 of approximately 0.69 gallons from skimmers and RW-5 bailing. Final measured product tank volume approximately 33.8 gallons. Active skimmer left off until recovery tank is replaced. RW-6 2.62 RW-1 - 13.05 - RW-2 13.95 13.98 0.03 20.83 Initial measured product recovery tank volume approximately 33.8 gallons.Recovered a 6/20/05 RW-3 13.94 14.29 0.35 21.80 combined total from RW-3 and RW-4 of approximately 0.25 gallons from skimmers and RW-4 13.16 13.43 0.27 95.10 bailing. Final measured product recovery tank volume approximately 34.05 gallons. RW-5 - 12.75 - Active skimmer left off until recovery tank is replaced. RW-6 13.47 13.48 1 0.01 2.62 RW-1 - 13.16 - RW-2 14.10 14.11 0.01 20.83 Initial measured product recovery tank volume approximately 34 gallons.Recovered a 6/27/05 RW-3 14.09 14.24 0.15 21.92 combined total from RW-3 and RW-4 ofapproximately 0.13 gallons front skimmers and RW-4 13.31 13.53 0.22 95.24 bailing. Ending measured product recovery tank volume approximately 34.1 gallons. RW-5 - 12.85 - Active skimmer left off until recovery tank is replaced. RW-6 13.57 13.60 0.03 2.62 RW-t - 13.35 - RW-2 14.28 14.29 0.01 20.83 Initial measured product recovery tank volume approximately 34.1 gallons.Recovered a 7/8/05 RW-3 14.28 14.30 0.02 22.10 combined total from RW-3, RW-4, and RW-6 of approximately 0.63 gallons from RW-4 13.45 13.88 0.43 95.69 skimmers and bailing.Ending measured product recovery tank volume approximately RW-5 - 12.99 34.8 gallons.Active skimmer left off until recovery tank is replaced. RW-6 13.75 13.80 0.05 2.67 RW-1 - 13.46 - RW-2 14.32 14.34 0.02 20.85 Initial measured product recovery tank volume approximately 34.8 gallons.Recovered a 7/14/05 RW-3 14.33 14.36 0.03 22.11 combined total from RW-3, RW-4, and RW-6 of approximately 0.35 gallons from RW-4 13.53 14.20 0.67 96.02 skimmers and bailing.Ending measured product recovery tank volume approximately RW-5 - 13.08 - 35.1 gallons.Active skimmer left offuntil recovery tank is replaced. RW-6 13.87 13.92 0.05 2.67 RW-1 - 13.65 - Initial measured product recovery tank volume approximately 35.1 gallons. Installed RW-2 14.57 14.59 0.02 20.90 skimmer hardware and plumbing to new product drum. Recovered a combined total RW-3 14.59 14.60 0.01 22.12 7/22/05 from RW-2,RW-3,RW-4,and RW-6 of approximately 1.0 gallon from skimmers and RW 4 13.73 14.41 0.68 96.87 bailing.Ending measured product recovery tank volume approximately 1.0 gallons in RW-5 - 13.24 - new product drum.Active skimmer left off. RW-6 14.06 14.13 0.07 2.76 Table B 111005 Page 10 of 11