SITE INFORMATION AND CORRESPONDENCE_1998-2000

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APR 28 '98 10:43 FR LEVINE-FRICKE-RECON 510 6524906 TO 12094683433 P.06i19 Levine•FridMGTS e,Recon TS property. The active drilling workspace at each groundwater extraction well and piezometer location will be approximately 30 feet by 60 feet, as indicated on Figures 1 and 2. The "collapsed" workspaces needed to store equipment on site at each location during the day are also indicated as hatched areas on Figures 1 and 2. The mud-rotary drilling rig and necessary equipment will remain in the collapsed areas during non-working hours. Typically, the hollow- stem drilling rig will be removed from the work area each day, therefore, the collapsed workspaces for piezometer installation will be smaller. Field equipment for the CPT/PIPP investigation will consist of a CPT rig and support vehicles. The work space at each location will be approximately 50 feet by 50 feet (for example, see Figure 1). The workspace for each well, piezometer, and CPT location will be cordoned-off during the Lincoln Center at the end of each work shift. drilling period to prohibit access by unauthorized personnel. Support vehicles will be moved off of Field equipment for the trenching, pipeline placement, and vault installation will likely consist of a backhoe/excavator, a bobcat to move soil, and support trucks to transfer soil, equipment, and imported backfill materials. The equipment and vehicles will be used at the required location each evening and will then be moved to the temporary staging area for storage at the end of each work shift. System startup will generally not require any heavy machinery, although field support vehicles will be parked adjacent to the wells. Field Personnel Mr. Donald T. Bradshaw, R.G., Site Project Manager, oversees all aspects of construction at the Lincoln Center site and can be contacted at (510) 596-9559. Mr, Chris Nardi, Senior Associate Geotechnical Engineer, and Mr. Andy Lojo, Senior Geologist, are responsible for supervising the field personnel conducting the groundwater extraction well and piezometer installation activities and they can be contacted at (510) 596-9580 and(510) 596-9515, respectively. Mr. Michael Glaser, Senior Construction Engineer, is responsible for supervising field personnel conducting the construction activities, including installing the extraction well vaults and groundwater conveyance piping, and can be reached at (510) 596-9633. Schedule Extraction Well, Piezometer, and CPT/PIPP installation We have tentatively scheduled drilling the groundwater extraction wells and piezometers on the Subject Property beginning on or before April 20, 1998. We estimate that approximately three to four weeks will be required to complete this work. To minimize disruption to tenants and their customers, and any other shoppers at Lincoln Center, field activities generally will be conducted between the hours of 8:00 p.m. and 7:00 a.m. on Sunday through Thursday evenings. After access I.U.A0wss-FaIW.E[W<II6{4I I I sItL 5