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04 August 2009 <br /> AGE-NC Project No. 98-0465 <br /> Page 2 of 2 <br /> Drilling&Testing, Inc.using a CME-75 drill rig equipped and 8.25-inch/10.25-inch hollow stem <br /> augers. Prior to well destruction,each well casing was sounded with a Solinst water level meter to <br /> ensure that no obstructions were present in the casings.Thereafter,the drill rig hoist was utilized to <br /> remove each monitoring well box steel ring. <br /> Monitoring wells MW-1,MW-2 and MW-5 were destroyed at the site by connecting a cable to the <br /> top of the well casing and removing the entire well casing with the drill rig hoist.Thereafter,the well <br /> casing void space was backfilled utilizing portland type II grout. Four 50-pound bags of portland <br /> type II cement were utilized to backfill the well casing void space;a ratio of three gallons water for <br /> every 50-pound sack of portland cement was utilized in preparation of the grout mixture. Each well <br /> was completely backfilled to surface grade with the portland cement grout mixture. <br /> Monitoring wells MW-3 and MW-4 were over-drilled to total depths of 25 feet bsg due to the <br /> inability to remove the well casings with the drill rig hoist. Following each over-drill, the well <br /> casings from MW-3 and MW-4 were removed and inspected by a representative of EHD. Total <br /> depths of over-drilled borings MW-3 and MW-4 were measured at 25 feet bsg;thereafter,each over- <br /> drilled boring was completely backfilled with a portland type 11 cement grout mixture. Eight 50- <br /> pound bags of portland type 11 cement were utilized to backfill each boring; a ratio of three gallons <br /> water for every 50-pound sack of portland cement was utilized in preparation of the grout mixture. <br /> Each boring was completely backfilled to surface grade with the portland cement grout mixture <br /> utilizing the hollow stem augers as a tremie pipe. <br /> The above referenced well casings and soil cuttings were hauled off-site for disposal at U.S.Ecology <br /> Nevada Inc.;a copy of the non-hazardous waste manifest is included with Appendix B.If you have <br /> any questions or require further information, please contact our office at(209)467-1006. <br /> Sincerely, <br /> NAL <br /> Advanced GeoEnvironmental,Inc. e W• M/ t <br /> IJ�IN�I�� <br /> NO.asTa <br /> .. <br /> Timothy(y C lar Brian Millman <br /> Senior Project Geologist Senior Project Geologist <br /> California Professional Geologist No. 8574 <br /> Enclosures <br /> cc: Mr. Phil Elder,Country Club Food and Fuel <br /> Mr. James Barton, Central Valley Regional Water Quality Control Board <br /> Advanced GeoEnvironnental,Inc. <br />