National Grid’s Remediation Contractor continued with site mobilization and preparation activities, which included the delivery and installation of the construction support trailers, backfill material and access road base material (gravel), and initial delivery of the tent enclosure structural elements. In addition, work continued on utility connections, field verification of the electric utility located along Beach Channel Drive, relocation and installation of the Beach 108th Street site access gate, pre-characterization activities along the southern perimeter utility cut and cap alignment. Odor and dust suppression activities were performed, as necessary. National Grid’s consulting engineers continued to monitor the site activities with 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 December 1, 2008 through December 5, 2008, six portable CAMP locations 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 December 8, 2008 through December 12, 2008, deliveries are scheduled for backfill material and access road base material (gravel), and continued delivery of the tent enclosure structural elements. In addition, the Remediation Contractor will continue utility connections, pre-characterization activities along the northern perimeter utility cut and cap alignment as well as the southern perimeter alignment. 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.