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dated 01 November 2000 • October 200.1 -AGE advanced three cone penetrometer testing(CPT) soil bonngs (CPT-1, CPT-2 and CPT-2A) at the site to maximum depths of 150 feet bsg to assess the vertical extent ofpetroleum-impact and identify potential hydrologic units Based on CPT data,AGE interpreted the CPT data to identify nine potential hydrogeologic units at depths between 25 feet and 150 feet bsg informally identified as Hydrologic Units 1 through 9 Analytical results of grab water samples detected TPH-g at depths as great as 140 feet bsg from CPT-1 and CPT-2A at concentrations as high as 840µg/1 and BTEX constituents as high as 120µg/1 xylenes Results of the October 2001 investigation were reported by AGE in Cone Penetrometer Testing Site Investigation -Fourth Quarter 2001, dated 19 February 2002 • October, November & December 2002 - Due to internal damage at well MW-13 (casing separation),one multi-level ground water monitoring well(MW-13A,B and C)was installed on-site to a maximum depth of 150 feet bsg to replace the damaged well, well MW-13 was tnple-completed utilizing Sollmst CMT, 1 7--inch diameter teflon casing screened at depths of 95-100 feet bsg, 120-125 feet bsg and 145-150 feet bsg Due to the severe heaving sands, no sampling activities were performed during drilling of replacement well MW-13 (A-C) Analytical results of the initial water sample detected TPH-g at a concentrations as ingh as 330 µg/1 and BTEX constituents as high as 38 µg/1 toluene Results of the October/November/December 2000 investigation were reported by AGE in Multi-Level Monitoring Well Installation Report - 4`4 Quarter 2002, dated 13 May 2003 • January 2003 - One ground water extraction well (EW-1) was installed on-site to a maximum depth of 65 feet bsg, well EW-1 was single-completed utilizing 6-mch diameter PVC casing screened 40-65 feet bsg Analytical results of soil samples detected TPH-g from EW-1 as deep as 50 feet bsg at concentrations as high as 3,300 mg/kg and BTEX constituents at concentrations as high as 440 mg/kg xylenes Results of the January 2003 investigation were reported by AGE in Ground Water Aquifer Pumping Test Report-July 2003, dated 04 February 2004 • July 2003 - Ground water aquifer pump testing was performed from EW-1 at the site to (1) obtain general ground water aquifer characteristics and (2) to evaluate aquifer response to ground water extraction The pump test results indicated a radius of influence fiom EW-1 at approximately 62 feet at 5 GPM, transmissivity was calculated at 565 ft /day(equivalent to 4,216 gallons per day/ft)and a storativity value calculated at 0 11,hydraulic conductivity was calculated at 22 6 ft/day,or 0 008 cm/s which is consistent with a silty sand to fine sand Analytical Results of grab water samples collected during the pump test detected TPH-g at concentrations as high as 71,000 µg/l and BTEX constituents as high as 13,000 µg/1 xylene Results of the January 2003 investigation were reported by AGE in Ground WntPr Aquifer Pumping Test Report -July 2003, dated 04 February 2004 Between Augustl996 and June 2004, thirty ground water monitoring events were performed at the site to monitor dissolved petroleum hydrocarbon concentrations in ground water and to characterize ground water flow direction and gradient on the site, ground water flow direction was consistently oriented toward the east-northeast at a gradierits between 0 002 and 0 005 Initially,the most intense APPENDIX A