SITE INFORMATION AND CORRESPONDENCE_1998-2000

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Levine•Fricke•Recon ENGINEERS,HVDROGEOLOGISTS&APPLIED SCIENTISTS contact with utilities during installation. At the end of each work shift, any waste materials or debris generated during field activities will be removed and the work area will be cleaned. Upon completion of this fieldwork, the asphalt or concrete surfaces or landscaping surrounding the extraction wells and piezometers will be restored to its original condition. All drilling equipment will be decontaminated in accordance with the procedures presented in Section 4.1 of the FSP. All waste generated during this work will be managed in accordance with the procedures presented in the Investigation-Derived Residuals Management Plan, Appendix D of the RI/FS Work Plan. All of these activities will be performed in accordance with the Health and Safety Plan, Appendix F of the RI/FS Work Plan. Field Equipment Field equipment for the extraction well installation will consist of a mud-rotary drilling rig, shaker trailer, and support vehicles. Field equipment for the piezometer installation will consist of a hollow-stem drilling rig and support vehicles. The active drilling workspace at all locations will be approximately 30 feet by 60 feet, covering an area of approximately 1,800 square feet, as indicated on Figures 2 through 4. The workspace for both drilling methods will be cordoned-off during the drilling period to prohibit access by unauthorized personnel. Support vehicles will be moved off Lincoln Center at the end of each work shift. The "collapsed" workspaces needed to store equipment on-site at each location during the day are also indicated on Figures 2 through 5. The mud-rotary drilling rig and necessary equipment will remain in the collapsed areas. The hollow-stem drilling rig will typically be able to leave the work area each day, thus the piezometer collapsed workspaces will be smaller. Field Personnel Mr. Donald T. Bradshaw, R.G., Site Project Manager, oversees all aspects of the construction at the Lincoln Center site and can be contacted at (510) 596-9559. Mr. Chris Nardi, Senior Associate Geotechnical Engineer, is responsible for supervising the field personnel conducting the extraction well and piezometer installation tasks and can be contacted at (510) 596-9580. The names of LFR staff assigned to oversee the drilling activities will be provided to you a minimum of 48-hours before the actual start dates. Schedule The schedule for these field activities is somewhat dependent on weather conditions. We have tentatively scheduled drilling the extraction wells on LPL property beginning on March 23, 1998. We estimate that approximately six to eight weeks will be required to complete this work. We anticipate that drilling for the piezometers will begin on LPL property on April 13, 1998, and require four to six weeks to complete. After the final schedule is determined, LFR will provide LPL with 48-hour notice of the actual start dates. LU-A=ss-LPL-Ph I extract-041I I:SRL 2