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r 26 March 2012 AGE-NC Project No. 08-1642 Page 2 of 2 25 pounds per square inch, for 10 minutes, to allow grout to enter the sand pack interval. Following pressurization, the upper three feet of each well was destroyed by over-drilling using hollow stem augers. Well MW-12 was hand dug to three feet bsg, removing the remnant Portland cement and bentonite from installation. After removal, the blank well casing and screen were removed intact. Following casing removal, the borehole was filled from bottom to top with Portland cement. Once all the above wells were destroyed, each well box was removed and the surface was finished with a rapid setting concrete mixture; the surface at well MW-6 was finished with native soil. Ground water monitoring MW-8, MW-10 and MVV-13 were removed by over-drilling the wells to total depths of 21 feet bsg (MW-8 and W-10) and 35 feet bsg (MW-13) with 8.5-inch diameter hollow stem augers. Following o erdriIling each well was grouted to near surface using a Portland cement grout mixture,wel boxes were removed and the surfaces at each location were completed with a rapid setti g concrete mixture. On 08 March 2012, three 55-gallon drums filled with soil cuttings and debris and two 55-gallon drums filled with purged water generatec during previous monitoring events and extruded drilling water were removed from the si a by Instrat Incorporated of Rio Vista, California. Waste generated was hauled an disposed of at Instrat's facilities. A non--hazardous waste manifests documentinj the waste disposal is included in Appendix B. If you have any questions or require further information, please contact our office at (800) 511-9300. Sincerely, Advanced GeoEnvfronmental, Inc. Daniel J. Villanueva W Iliam R. Little Staff Geologist SE nior Project Geologis C lifornia Registered Geologist No. 7473 Enclosures cc: Mr. Terry McDonald Advanced GeoEnvironmental,Inc.