SITE INFORMATION AND CORRESPONDENCE_1997

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Levine-Fricke-Recon ENGINEERS,HVDROGEOLOGISTS&APPLIED SCIENTISTS 3. Pilot Boring and Monitoring Well Installation Field equipment for the pilot boring and monitoring well installation will consist of a drilling rig and support vehicles. Two photographs of a drilling rig used at a similar location are presented in Figure 4. The work space will be approximately 50 feet by 80 feet, covering an area of approximately 4,000 square feet. The work space will be cordoned off during the drilling period to prohibit access by unauthorized personnel. Because of the nature of this drilling method, it will be necessary to keep certain key equipment in place during the duration of the work. Between work shifts, the work space will be reduced to 40 feet by 45 feet to accommodate the drilling rig and other key equipment that must be left on site. The work space will be cordoned off with traffic cones and barrier tape and a security guard will be present during nonworking hours. Field Personnel Donald T. Bradshaw, R.G., Site Project Manager, oversees all aspects of the investigation, monitoring, and testing at the Lincoln Center site and can be contacted at (510) 596-9559. Christopher Alger, Senior Engineering Geologist, is responsible for supervising the field personnel conducting the GPT/PIPP investigation and can be contacted at (510) 596-9683. Adam Klein, Senior Associate Hydrologist, is responsible for supervising the field personnel conducting the soil- vapor investigation and can be contacted at (510) 596-9562. Sarah L. Raker, Senior Hydrogeologist, is responsible for supervising the field personnel conducting the pilot boring and monitoring well installations and can be contacted at (510) 596-9593. LPL representatives may also be in attendance to oversee field activities. Schedule The proposed schedule for the field work is presented below. Field Activity Proposed Schedule Estimated Number of Work Shifts CPT/PIPP Investigation June 16 through June 20, 1997 S Evenings June 23 through June 27, 1997 Soil-Vapor Investigation June 16 through June 20, 1997 5 Evenings Pilot Borings and Monitoring June 16 through June 20, 1997 5 Evenings Well Installation To minimize disruption to tenants and their customers, and any other shoppers at Lincoln Center, field activities will be conducted between the hours of 8:00 p.m. and 7:00 a.m. The proposed schedule is estimated and may be extended as a result of unanticipated circumstances. We will notify you in advance of any schedule changes. LC-ACCI7.LTR:JBA 4