National Grid’s Remediation Contractor continued with site mobilization and preparation activities, which included the delivery of construction materials, additional equipment and supplies. The installation of the construction support trailers, water and sanitary holding tanks, office equipment, and utility connections also continued. The two foot thick Site Wide Cap and perimeter utility cut and cap excavations continued along the northeast corner and eastern side of the site. Excavated materials were transported off-site for disposal at approved and licensed disposal facilities. Demolition of concrete in the area of the former electrical substation continued, where the concrete was relocated and consolidated to the southwest corner of the Site. The noise and vibration monitoring program was conducted during the concrete demolition activities.

Personal decontamination shelter construction and installation on pad was completed. Further delineation of work zones (exclusion, decontamination, and support) continued. Maintenance of the interior access roads, parking areas, staging area, and upgrade clean fill stockpile cover continued. Odor and dust suppression activities were conducted as necessary. National Grid’s consulting engineer continued to monitor the site activities with the fixed base community air monitoring program (CAMP) equipment.

CAMP data is reviewed and compared to specific NYSDEC/NYSDOH approved criteria, known as “Action Limits.” As a result of this evaluation process, site conditions are categorized into two categories, “Operational Condition” and “Action Condition.” The “Operational Condition” is applicable when the data is below the “Action Limits”, and means that normal operations can continue. The “Action Condition” occurs when one or more of the fifteen minute average measurements for Dust (PM10), Total Volatile Organic Compounds (TVOC), Naphthalene or Odor Intensity are greater than the background or upwind measurement by the specified “Action Limits.” Reaching an Action Level requires corrective action or stopping work until the condition is addressed or abates. During the period from January 26, 2009 through January 30, 2009, six fixed base CAMP units and two portable CAMP units were in-use and measured TVOC and PM10. Fifteen-minute averages for TVOC and PM10 data remained in Operational Condition. No elevated readings for TVOC or PM10 were reporting during the weekly monitoring period. Weekly Reports of the CAMP data can be found as a separate tab in the Weekly Report Archive section.

For the week of February 1, 2009 through February 6, 2009, the Remediation Contractor plans to conduct the final installation of the support trailers and utility connections. Perimeter utility cut and cap excavation activities are scheduled to continue along the eastern side and southeast corner of the Site with off-site transport and disposal of excavated material at an approved and licensed disposal facility. Concrete pads along eastern side of Site will be demolished and consolidated in the southwestern part of the Site for future crushing and reuse in accordance with the necessary NYSDEC approvals. Odor and dust suppression activities will be conducted as necessary. National Grid’s consulting engineer will continue to monitor the site activities with CAMP equipment.