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Table B-Historical Diesel Thickness Measurements and Product Recovery Data (6/18/99 through 11/9/05) Date n Recovery Depth to Depth to Diesel Cumulative Operations and Maintenance Notes Well Floating Groundwater Thickness Diesel Diesel Removed (gallons) RW-2 12.93 12.95 0.02 19.70 Product recovery barrel measurement indicated approximately 46.25 gallons of product; system sensor stopped pumping due to tank full status.Full tank removed and replaced with an empty recovery barrel;skimmer pump set to continuous mode.Full product barrel set next to diesel AST basin.Absorbent socks in RW-2 and RW-3 strained;a negligible amount of product recovered. Skimmer pump in RW-4 removed 3/17/03 RW-3 12.76 13.32 0.56 2.30 approximately 0.5 gallons of product.Skimmer puup removed from RW-4 and installed in RW-3.Cycle remained on continuous mode until no additional product was removed; cycle then set on(3)5-minute cycles/day.Absorbent socks placed in RW-2 and RW-4. Approximately 1.0 gallon ofproduct was measured in the new recovery barrel.Half inch metal bars and orange safety tape was placed around the skimmer pump for added visibility. .RW-4 12.62 12.63 - 0.01 40.45 RW-2 12.93 12.98 0.05 19.70 .. Skimmer pump installed in RW-3 was inspected and the N2 tank exchanged.The system regulator was not functioning and required repair.Cycle set on(1)5-minute cycle/day. The recovery sock from RW-4 was strained and replaced,and free product from the well 4/2/03 RW-3 12.97 13.17 0.20 2.30 was bailed; approximately 2 gallons was added to the product recovery barrel. Insufficient product available in RW-2 for bailing to be effective.The recovery sock in RW-2 was strained and replaced;a negligible amount of product was recovered.Post bailing measurement of the product recovery barrel indicated approximately 3 gallons of product. _ - RW-4 11.91 15.24 3.33 42.45 RW-2 13.06 13.12 0.06 19.70 The skimmer pump regulator and battery were not operational.The line pressure was functional;however,the tank pressure was not.Absorbent socks in RW-2 and RW-4 4/13/03 RW-3 13.19 13.39 0.30 2.80 strained;a negligible amount of product recovered.Skimmer pump removed from RW- 3 and installed in RW-4. Recovery socks were reinserted in RW-2 and RW-3. Approximately 3.5 gallons in product recovery barrel. RW-4 12.02 15.58 3.56 42.45 RW-2 13.06 13.14 0.08 19.70 Skimmer pump removed from RW-4 and inspected.Skimmer pump was reinstalled in RW-4 and the pump cycle set at(6)5-minute cycles/day.The N2 tank supply tank and 4/25/03 RW-3 13.02 13.51 0.49 2.80 battery were replaced and a new regulator was purchased and installed.The pump cycle was reset at(3)3-minute cycles per day.Absorbent socks in RW-2 and RW-3 strained and replaced;a negligible amount of product recovered.Approximately 10.5 gallons in product recovery barrel. RW-4 12.58 13.05- 0.47. 49.45 RW-2 13.16 13.37 0.21 19.70 Initial measurement of the product recovery barrel indicated approximately 22.75 gallons of diesel product Skimmer pump left in RW-4;pump cycle reset to(1)5-minute 5/22/03 RW-3 13.02 14.34 1.32 3.80 cycle/day. Absorbent socks in RW-2 and RW-3 removed and strained; a negligible amount of product recovered.Approximately 1 gallon of free product was bailed from RW-3 and added to the product recovery barrel.The absorbent socks were replaced in RW-2 and RW-3.Approximately 23.75 gallons in product recovery barrel. RW-4 12.77 12.82 0.05 61.70 Table B 111005 - Page 5 of 11