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r i Table B-Historical Diesel Thickness Measurements and Product Recovery Data (6/18/99 through 11/9/05) Date 'Recovery Depth to Depth to Diesel cumulative Operations and Maintenance Notes Well Floating Groundwater Thickness Diesel Diesel Removed (gallons) RW-1 13.00 13.05 0.05 11/11/02 RW-2 - 13.77 - 19.55 Skimmer pump in RW4 inoperative; insufficient water/product in well for pump to RW-3 13.54 13.82 0.28 function properly. RW-4 13.02 14.19 1.17 16.00 RW-1 13.25 13.30 0.05 RW-2 13.88 13.89 0.01 19.55 Bailed product from RW-3 and RW-4.Absorbent socks in RW-1 and RW-3 strained 11/21/02 and replaced. Skimmer pump in RW-4 not utilized due to low water depth.Product RW-3 13.72 14.30 0.58 0.20* recovery barrel measurement indicated approximately 29.5 gallons of product and accumulated water. RW-4 12.92 15.26 2.34 17.0* RW-2 13.01 13.02 0.01 19.55 Absorbent socks in RW-I and RW-3 strained and replaced.Skimmer pump in RW4 12/27/02 RW-3 12.72 13.26 0.54 0.20 RW-4 12.37 14.33 1.96 17.00 still not operating properly;pump left active. RW-2 12.79 12.85 0.06 19.55 Product measurements taken with recovery socks in place in RW-I and RW-3. Absorbent socks in RW-I and RW-3 strained.Replaced sock in RW-3 and moved other sock to RW-2.Approximately.75 gallon of product was removed from RW-3 using a 1/20/03 RW-3 12.52 13.54 1.01 0.95 disposable two-much bailer.Approximately 1.0 gallon of product was removed from RW- 4 using a disposable two-inch bailer. Skimmer pump in RW-4 was removed during measurement and appears to be functional, but still not recovering product. 31.75 RW-4 12.02 14.12 2.10 18.00 gallons in product recovery barrel. RW-2 12.86 12.87 0.01 19.60 N2 tank removed and exchanged. Absorbent socks in RW-2 and RW-3 strained and replaced. Approximately 0.05-gallon of product was recovered from RW-2. 2/10/03& Approximately 0.75 gallon of product was recovered from RW-3 using a disposable two. 2/11/03 RW-3 12.67 13.52 0.85 1.70 inch bailer.Approximately 2.0 gallons of product were recovered from RW-4 using a disposable two-inch bailer.Skimmer pump left off in RW-4 because of non-recovery of product.Approximately 6.45 gallons of water were removed from the product recovery RW-4 11.91 14.79 2.88 20.00 barrel using a disposable coliwasa.28.1 gallons in product recovery barrel. RW-2 19.60 Skimmer pump in RW-4 repaired and turned back on. Approximately 1.0 gallon of 2/12/03 RW-3 1.70 water was purged from the product recovery barrel.An estimated value of 0.40 gallon RW-4 12.10 13.70 20.40* was skimmed from RW-4.26.5 gallons in product recovery barrel. RW-2 12.89 13.01 0.12 19.70 Skimmer pump installed in RW-4 active.Pump cycle set at(3) 10-minute cycles/day. 2/21/03 RW-3 12.80 13.20 0.40 1.80 Absorbent socks in RW-2 and RW-3 strained and replaced;approximately 0.20 gallons of product added to the product recovery barrel.Product recovery barrel measurement indicated approximately 34.2 gallons of product including a negligible amount of water RW-4 12.20 13.46 1.26 27.90 (<1 gallon[). RW-2 12.88 12.95 0.07 19.70 Skimmer pump installed in RW-4 active.N2 tank removed and exchanged;pump cycle set at (1) 5-minute cycle/day. Absorbent socks in RW-2 and RW-3 strained and 2/25/03 RW-3 12.80 13.21 0.41 1.80 replaced;a negligible amount of product recovered.Insufficient product in RW-2 and RW-3 for bailing to be effective. Product recovery barrel measurement indicated approximately 37.1 gallons of product(coliwasa confirmed all product). RW-4 12.55 12.56 0.01 30.80 RW-2 12.92 12.95 0.03 19.70 Skinruner pump installed in RW-4 inspected and maintained.Pump cycle set at(3)3- 3/11/03 RW-3 12.80 13.40 0.60 1.80 minute cycles/day.Absorbent socks in RW-2 and RW.-3 strained and replaced with new socks;a negligible amount of product recovered.Product recovery barrel measurement indicated approximately 44 gallons of product(coliwasa confirmed all product). RW-4 12.49 13.22 0.73 37.70 Pacie 4 of 11