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F <br /> r <br /> 1 <br /> 31 December 2008 <br /> AGE-NC Project No. 97-0360 ` <br /> Page 2 of 2 <br /> depth with 8-inch diameter hollow stem augers and a solid drive lead-bit and the extraction well was <br /> removed by over-drilling to its total depth with 15-inch diarneter,hollow stem augers and a solid <br /> i drive lead bit.Well borings were then grouted to near surface using a portland cement grout mixture. <br /> A ratio of six gallons water for every 94-pound sack of portland cement was utilized in preparation <br /> of the grout mixture.Borings for all wells were completely backfilled to 0.5 feet below surface grade <br /> with neat cement and then to surface grade with concrete. :F <br /> On 31 December 2008,non-hazardous purge water/rinseate(generated from monitoring events and <br /> well destructions) and drums of soil cuttings and solid waste.(generated from well destructions) <br /> containerized in 55-gallon drums were removed from the site by Advanced Chemical Transport,Inc. <br /> (ACT)of Merced,California.Non-hazardous waste was disposed at Riverbank Oil Transfer located <br /> in Riverbank, California. Non-hazardous waste manifests w i11 be transmitted to the EHD upon <br /> receipt of the manifests from ACT. , <br /> If you have any questions or require further information,please contact our office at(800)511-9300. <br /> Sincerely, <br /> Advanced GeoEnviron mental,Inc. <br /> E�SSk'3 l Grpp�0 <br /> AVX <br /> Ally L. C ita William R. Little <br /> Project Scientist Senior Project Geologist rr�rF�- FOP��P <br /> !- CAI- <br /> California Registered Geologist 3 <br /> Enclosures <br /> cc: Mr. Monty Warren <br />` Mr. James Barton, CVRWQCB <br /> 1 `¢ <br /> E� <br /> S- <br /> .advanced GeoEnvironmental,Inc. <br /> ' a <br /> 1 <br />