National Grid’s Remediation Contractor continued with site remediation activities, which included the delivery of construction materials, imported backfill material (stone and common fill), as well as construction equipment and supplies.  Tent Position #9 Shallow Excavation activities continued with off-site transport and disposal of impacted soils at approved and permitted disposal facilities.  Backfill material placement and compaction activities continued inside Tent Position #9.  Temporary sheet piling removal and on-site staging continued. Common fill material deliveries and grading activities continued to support the Cap construction.  National Grid’s consulting engineer conducted noise and vibration monitoring activities, as necessary.

Maintenance of the decontamination areas, work zones, on-site gravel access roads, parking areas and material staging areas, imported backfill material (i.e., clean fill), stockpile covers, the perimeter privacy screen, and soil erosion and sediment control (SESC) measures continued. Odor and dust suppression activities were conducted, as necessary. National Grid’s consulting engineers continued to monitor the site activities with the community air monitoring program (CAMP) equipment.

During the period from August 23, 2010 through August 29, 2010, six fixed base CAMP units and two portable CAMP units were in-use and measured total volatile organic compounds (TVOC) and particulates (PM10). Fifteen-minute averages for both TVOC and PM10 data remained in the Operational Condition. No elevated TVOC or PM10 readings were reported for the weekly monitoring period.  The Weekly Report that summarizes the CAMP data can be found as a separate tab in the Weekly Report Archive section.

For the week of August 30, 2010 through September 3, 2010, Tent Position #9 Shallow Excavation activities are scheduled for completion with off-site transport and disposal of impacted soils at approved and permitted disposal facilities.  Backfill material placement and compaction activities are scheduled for completion inside Tent Position #9. Temporary sheet piling will continue to be removed and staged on-site for re-use or for future demobilization from the Site, as appropriate. Odor and dust suppression activities will be conducted, as necessary.  Work zone delineation, site maintenance activities, CAMP operation monitoring activities will continue, and noise and vibration monitoring activities will continue, as necessary.