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INTERNATIONAL TECHNOLOGY CORPORATION Ms. Mary Meays 3 October 27, 1997 All of the wells were completed at the surface with Christy-box or equivalent surface protection. Each protective cover will be removed, and the well will be either drilled out or pressure grouted. Following overdrilling and/or pressure grouting, each well will be finished at the surface to match the current surface conditions. Overdrilling will be performed using a hollow stem auger drill rig. Well abandonment will be performed in accordance with San Joaquin County and Department of Water Resources guidelines. Disposal of Generated Waste The drill cuttings generated during the field activities will be collected in a 10 cubic yard bin prior disposal at a Class II landfill. Water that is generated during the field activities will be contained and discharged to the water treatment system located on the facility. The well casing from MW-4 and the surface protection for the wells will be disposed as sanitary waste. Health an Safety The well abandonment activities will be performed in compliance with the site-specific Health and Safety Plan, dated November 1994 and the Health and Safety Plan Addendum and Update, dated August 1995. Well Abandonment Report Following completion of the field activities and disposal of the drill cuttings, a letter report will be submitted to PHS/EHD to document the field activities. This report will also include associated documentation such as DWR well abandonment records, and records of waste disposal. Should you have further questions, please do not hesitate to call me at (510) 372-5253. Sincerely, IT CORPORATION Linus Farias Project Manager M ZlVDBF197-0014.wp cc: Mr. Frank Yoneshige, Lipton Project Files IT Corporatfon is a wholly owned subsichary of International Technology Corporation