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r V Table B-Historical Diesel Thickness Measurements and Product Recovery Data (6/18/99 through 11/9105) Date t Recovery Depth to Depth to Diesel Cumulative Operations and Maintenance Notes Well Floating Groundwater Thickness Diesel Diesel Removed (gallons) RW-1 - 12.23 - RW-2 12.77 13.12 0.35 20.20 Skimmer pump moved to RW-3 due to insufficient product layer in RW-4 and set on(3) 2/4/04 RW-3 12.48 14.66 2.38 8.30 3-minute cycle/day.Two absorbent socks placed in RW-4.With the exception of RW-3, RW-4 12.39 12.60 0.21 90.70 insufficient product layer in recovery wells to support removal methods.Approximately RW-5 12.04 12.05 0.01 14.5 gallons in product recovery barrel. RW-6 12.52 12.91 0.39 0.50 RW-1 - 12.13 RW-2 12.71 13.03 0.32 20.20 2/9/04 RW-3 - 12.26 - 9.80 Skimmer pump in RW-3 set on (3) 3-minute cycle/day, changed to (3) 1-minute RW 4 12.25 12.27 0.02 90.70 cycle/day. Approximately 16 gallons in product recovery barrel. RW-5 12.33 12.33 sheen RW-6 12.45 12.81 0.36 0.50 RW-1 sheets 11.44 sheen RW-2 11.88 12.21 0.33 20.20 3/12/04 RW-3 12.09 12.17 0.08 13.80 Skimmer pump in RW-3 set on (3) 1-minute cycles/day, changed to (1) 3-minute RW-4 - 11.69 - 90.70 cycle/day. Approximately 20 gallons in product recovery barrel. RW-5 - 11.69 - RW-6 11.71 11.97 0.26 0.50 RW-I - 12.13 - RW-2 12.80 13.26 0.46 20.20 Skimmer pump in RW-3 set on (1) 3-minute cycles/day changed to (3) 3-minute RW-3 12.81 13.11 0.30 14.80 5/13/04 cycle/day. Approximately 21 gallons in product recovery barrel. Skimmer battery RW-4 12.31 12.41 0.10 90.70 changed.Nitrogen tank replaced. RW-5 Sheen 13.10 Sheen RW-6 12.50 13.16 0.66 0.50 RW-1 - 12.26 - RW-2 12.93 13.40 0.47 20.30 Skirmner pump in RW-3 set on(3)3-minute cycles/day. Approximately 21.20 gallons RW-3 12.98 13.10 0.12 14.90 5/20/04 in product recovery barrel.Pump run timer was not working. The timer was fixed and is RW-4 12.44 12.58 0.14 90.70 functioning properly. RW-5 - 12.17 - RW-6 12.92 13.30 0.38 0.50 RW-1 - 12.57 - RW-2 - 13.28 - 20.30 6/3/04 RW-3 13.42 13.55 0.13 14.95 Skimmer pump in RW-3 set on(3)3-minute cycles/day. Approximately 21.25 gallons RW-4 - 12.72 90.70 in product recovery barrel.Battery voltage good at 12.49 volts. RW-5 - 12.40 - RW-6 12.92 13.64 0.72 0.50 RW-1 13.00 13.01 0.01 RW-2 13.67 14.11 0.44 20.30 Skimmer pump in RW-3 set on(3)3-minute cyclestday.Skimmer pump moved to RW- 6/25/04 RW-3 13.75 13.95 0.20 14.95 6 and set to(3)3-minute c cle/daY� Approximately 21.25 gallons in product recovery RW-4 13.07 13.95 0.88 90.70 barrel. RW-5 - 12.78 - RW-6 13.32 14.11 0.79 0.50 RW-1 13.13 13.14 0.01 RW-2 13.83 13.88 0.05 20.30 Skimmer pump in RW-6 set on(3)3-minute cycles/day. Approximately 22.00 gallons 7/2/04 RW-3 13.80 14.03 0.23 14.95 in product recovery barrel.Product recovery barrel level was misread and is incorrectly RW-4 13.22 14.13 0.91 90.70 noted on the field form for 7/2/04 at 34 gallons(corrected on 7/9/04 and 7/30/04 field RW-5 - 12.90 - forms).Battery voltage good. RW-6 13.66 13.67 0.01 1.25 RW-I 13.30 13.31 0.01 RW-2 13.97 14.02 0.05 20.30 Skimmer pump in RW-6 set on(3)3-minute cycles/day.Skimmer pump moved to RW- 7/9/04 RW-3 13.95 14.19 0.24 14.95 4 and set to(3)3-minute c cle/daY� Approximately 22.00 pitons in product recovery RW-4 13.37 14.30 0.93 90.70 barrel. RW-5 - 12.90 RW-6 13.47 13.48 0.01 1.25 RW-1 13.43 13.44 0.01 RW-2 14.08 14.51 0.43 20.30 Skimmer pump in RW4 set on(3)3-minute cycles/day. Approximately 22.00 gallons 7/16/04 RW-3 14.05 14.31 0.26 14.95 in product recovery barrel.The level was misread and noted as 25.0 gallons on the field RW-4 13.77 13.80 0.03 90.70 form(corrected on 7/30/04 field form).Battery voltage good at 11.82 volts. RW-5 - 13.16 - RW-6 13.85 13.93 0.08 1.25 RW-I 13.53 13.55 0.02 RW-2 14.21 14.60 0.39 20.30 Skimmer pump in RW-4 set on(3)3-minute cycles/day. Approximately 22.00 gallons 7/21/04 RW-3 14.16 14.42 0.26 14.95 in product recovery barrel.The level was misread and noted as 26.0 gallons on the field RW-4 13.77 13.88 0.11 90.70 form(corrected on 7/30/04 field form). Battery voltage at 8.0 volts. Nitrogen tank RW-5 - 13.33 replaced,pressure at 1,500 psi. RW-6 13.98 14.07 0.09 1.25 Table B 111005 Page 7 of 11