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0 • KS-7 and KI-7 Monitor Well Destruction 4502-04 Kearney-KPF Facility, Stockton, CA Page 3 pump to the bottom of the MW casing and confirmed all obstructions were removed from MW KI-7. After the pump was pushed to the bottom of the well the top of the pump was tagged at 121-feet bls. The total well depth was 122.5 (Appendix A). A I-inch diameter tremie pipe was lowered to the bottom of MW and approximately 15 cu-ft(122 gallons) of Portland cement was pumped down the MW (Table 1). Dudek calculated approximately 114 gallons of neat cement would be required to backfill the MW casing and gravel pack, assuming the porosity of the gravel pack to equal 35%. Groundwater within the MW casing was pushed to land surface as the neat cement displaced the groundwater in the MW casing. The displaced groundwater was collected in 55- gallon drums. After the MW casing and filter pack was filled with neat cement, WDC inserted a pneumatic packer into the MW casing. The pneumatic packer was inflated and approximately 100 pounds per square inch(psi) of pressure was applied to push the neat cement into the filter pack. Pressure was applied for five minutes. The pneumatic packer was removed from the well casing and the MW was topped of with neat cement. After the MW was pressure grouted with neat cement, a cutting torch was used to cut the well casing and the conductor casing 1.5-feet bls. The existing asphalt road was cut 1-foot larger in diameter than the original borehole diameter. The MW vault, asphalt and road base were removed to approximately 1.5-feet bls. Neat cement was poured on top of the pressure grouted MW to form a 6-inch thick mushroom cap. Road base from the original excavation was used to back fill the excavation to 6-inches bls. On 07-Apr-06, a temporary 6-inch thick cold asphalt patch was placed and compacted to land surface in the excavation. On 14-Apr-06 Bonadonnas Asphalt Repairs, Inc. from Stockton, CA, removed the temporary cold asphalt patch and placed and compacted hot paving asphalt to land surface. The County of San Joaquin Department of Public Works inspected and approved the asphalt patch. A sample of the displaced groundwater was collected on 17-April-06 and 1 I—May-06. The samples were shipped over night to West Coast Analytical Service and analyzed by EPA Method 8260B. Trichloroethylene was the only VOC detected in the displaced groundwater samples at