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r s Table B-Historical Diesel Thickness Measurements and Product Recovery Data (6/18/99 through 11/9/05) Date t Recovery Depth to Depth to Diesel Cumulative Operations and Maintenance Notes Well Floating Groundwater Thickness Diesel Diesel Removed (gallons) RW-1 13.74 RW-2 14.63 14.65 0.02 20.93 Initial measured product recovery tank volume approximately 1.0 gallons. Previous RW-3 1462 1467 005 2215 product drum had been removed from Site.Recovered a combined total from RW-2, . . . . 7/29/2005 RW-3,RW-4, and RW-6 of approximately 0.75 gallons from skimmers and bailing. RW-4 13.76 14.82 1.06 97.55 Ending measured product recovery tank volume approximately 1.75 gallons. Active RW-5 - 13.40 - skimmer left off. RW-6 14.16 14.19 0.03 2.78 RW-I - 13.88 - Initial measured product recovery tank volume approximately 1.75 gallons.Recovered RW-2 14.67 14.71 0.04 20.93 approximately 0.15 gallons from RW4 with active skimmer while on Site. Ending RW-3 14.79 14.85 0.06 22.15 8/5/2005 measured product recovery tank volume approximately 1.9 gallons.Active skimmer in RW4 13.91 15.06 1.15 97.70 RW-4 turned on 55 psi 3-20 minute cycles per day.Tested skimmer shut off on 1 minute RW-5 - 13.56 - cycles-appears to start/shut off correctly.Changed battery out. RW-6 14.30 1 14.34 0.04 2.78 RW-1 - 14.01 - Initial measured product recovery tank volume approximately 1.9 gallons.Nitrogen tank RW-2 14.80 14.82 0.02 20.93 for active skimmer empty on arrival.Recovered approximately 0.10 gallons from RW-4 RW-3 14.75 14.79 0.04 22.15 8/12/2005 with bailer.Ending measured product recovery tank volume approximately 2.0 gallons. RW-4 13.99 15.35 1.36 97.80 Active skimmer in RW-4 fumed off- may be insufficient fluid column for active RW-5 - 13.68 RW-6 14.41 14.60 0.19 2.78 skimmer to operate. RW-I - 14.10 - 8/17 (3rd quarter GWM event). Initial measured product recovery tank volume RW-2 14.87 14.90 0.03 20.93 approximately 2.0 gallons. Insufficient fluid column in RW-2, RW-3, and RW-6 to 8/18/05 RW-3 14.87 14.89 0.02 22.15 operate passive skimmers. Changed out nitrogen tank for active skimmer in RW-4, RW-4 14.11 15.32 1.21 97.80" started active skimmer,and set run time/cycle to 10 min/3 times daily.Ending measured RW-5 - 13.79 - product recovery tank volume approximately 2.0 gallons. "Cumulative total diesel RW-6 14.51 14.55 0.04 2.78 removed from RW-4 revised down 0.70 gallons. RW-1 - 14.20 - RW-2 15.01 15.04 0.03 20.93 Initial product recovery tank volume approximately 2.0 gallons. Recovered 8/26/05 RW-3 14.92 14.98 0.06 22.15 approximately 0.24 gallons of product from RW-4 and RW-6 using bailing recovery RW-4 14.17 15.59 1.42 98.02 method.Reinstalled SoakEZ socks in RW-2 and RW-6.Reinstalled active skimmer in RW-5 - 13.91 - RW-4,skimmer was left on.Ending recovery tank volume approximately 2.2 gallons. RW-6 14.61 14.66 0.05 2.80 RW-1 - 14.37 RW-2 15.20 15.23 0.03 20.94 Initial product recovery tank volume approximately 2.2 gallons. Recovered RW-3 15.15 1520 0.05 22 17 approximately 0.55 gallons of product from RW-2, RW-3, RW-4, and RW-6 using . 9/9/05 bailing recovery method. Reinstalled SoakEZ socks in RW-2 and RW-6. Reinstalled RW-4 14.36 15.59 1.23 98.57 active skimmer in RW-4, skimmer was left on. Ending recovery tank volume RW-5 - 14.11 - approximately 2.8 gallons. RW-6 14.81 14.86 0.05 2.82 RW-I - 14.45 - RW-2 15.21 15.29 0.08 20.98 Initial product recovery tank volume approximately 2.8 gallons. Recovered 9/16/05 RW-3 15.21 15.27 0.06 22.20 approximately 0.8 gallons of product from RW-2, RW-3, RW4, and RW-6 using RW4 14.40 15.51 1.11 99.18 bailing recovery method. Reinstalled SoakEZ socks in RW-2 and RW-6. Removed RW-5 - 14.17 - active skimmer from Site.Ending recovery tank volume approximately 3.6 gallons. RW-6 14.86 1 14.98 0.12 2.89 RWA - 14.48 - RW-2 15.16 15.30 0.14 21.06 Initial product recovery tank volume approximately 3.6 gallons. Recovered 10/3/05 RW-3 15.12 15.28 0.16 22.29 approximately 1.0 gallon of product from RW-2,RW-3,RW4,and RW-6 using bailing RW4 14.36 15.57 1.21 99.88 recovery method.Reinstalled SoakEZ socks in RW-2 and RW-6.Ending recovery tank RW-5 - 14.23 - volume approximately 4.6 gallons. RW-6 14.90 15.13 0.23 3.02 RW-I - 14.38 - RW-2 15.04 15.31 0.27 21.28 Initial product recovery tank volume approximately 4.6 gallons. Recovered 10/31/05 RW-3 15.05 15.11 0.06 22.34 approximately 1.6 gallons of product from RW-2, RW-3, RW-4, and RW-6 using RW-4 14.26 15.57 1.31 100.91 bailing recovery method. Reinstalled SoakEZ socks in RW-2 and RW-6. Ending RW-5 - 14.20 - recovery tank volume approximately 6.2 gallons. RW-6 14.75 15.10 0.35 3.32 RWA - 14.34 - RW-2 14.98 15.34 0.36 21.53 Initial product recovery tank volume approximately 6.2 gallons. Recovered 11/9/05 RW-3 14.99 15.05 0.06 22.34 approximately 1.0 gallon of product from RW-2, RW-4, and RW-6 using bailing RW-4 14.21 15.58 1.37 101.41 recovery method.Reinstalled SoakEZ socks in RW-2 and RW-6.Ending recovery tank RW-5 - 14.16 - volume approximately 7.2 gallons. RW-6 14.84 15.07 0.23 3.57 Notes: All measurements are measured in feet unless otherwise noted;all depths measured from a marked measuring point on top of the well casing. Recovery wells not listed for the date specified did not contain floating product. "Estimated product recovery. ""Diesel recovered by bailing from RW-3 on 4/11/05 was inadvertently placed in the purge water drum and is summarized in the cumulative diesel removed volume,but not in product drum volume. Table B 111005 Page 11 of 11