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27 October 2009 <br /> AGE-NC Project No. 95-0128 <br /> Page 3 of 3 <br /> A total of 8 monitoring wells(MW-5,MW-7,MW-10 and MW-14 through MW-18)were destroyed <br /> using pressure grouting techniques. Each well that was that was pressure grouted was fitted with a <br /> pressure tight adapter connected to a hose extending from a grout mixer. A ratio of approximately <br /> 6 gallons water for every 94-pound sack of portland cement was utilized in preparation of the grout <br /> mixture.The grout mixture was pumped into each well casing for five minutes under approximately <br /> 30 pounds per square inch (psi)of pressure. The well boxes were then removed and the wells were <br /> over-drilled to three feet bsg using a CME-75 HT hollow stem auger drill rig equipped with 8-inch <br /> hollow stem augers.The top three to five feet of the well casings were then removed and the borings <br /> were grouted to the near surface using the portland cement grout mixture.Borings for all wells were <br /> either completely backfilled to 0.5 feet bsg with neat cement and then to surface grade with concrete <br /> or asphalt patching. New asphalt was replaced over well vault locations and new sidewalk was <br /> replaced over wells within sidewalks areas of the City of Stockton. <br /> All non-hazardous waste ( i.e. soil cuttings, PVC, and well boxes) generated during destruction <br /> activities were stored onsite in soil bins provided by Republic Services of Stockton,CA.Waste was <br /> removed and transported to Forward Landfill of Manteca, California on 02 October 2009 by Delta <br /> Container Corporation of Stockton, California. Remediation equipment and waste carbon was <br /> disposed by Slaby Sales Environmental,Inc.Uniform non-hazardous waste manifests documenting <br /> the waste disposal have been included as Appendix B. <br /> If you have any questions or require further information,please contact our office at(209)467-1006. <br /> Sincerely, <br /> Advanced Ge6Environmental, Inc. <br /> E�5510RAL GFp�D <br /> R %rte <br /> * No.-7473' <br /> William R. Little <br /> Senior Project Geologist <br /> California Professional Geolog n <br /> Enclosures <br /> cc: Mr. Arthur Wyatt <br /> Mr. James Barton, Central Valley Regional Water Quality Control Board <br />