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 #10b Shallow Excavation activities were completed with off-site transport and disposal of impacted soils at approved and permitted disposal facilities.  Temporary sheet piling continued to be staged for demobilization from the Site. 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 2, 2010 through August 8, 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 9, 2010 through August 13, 2010, delivery of imported clean backfill material (crushed stone and common fill) and backfill material placement and compaction inside Tent Position #10b are scheduled for completion.  Tent relocation activities from Tent Position #10b to the next Tent Position (Tent Position #9) are scheduled to commence. Tent relocation activities will include the temporary disassembly and staging of tent anchors and the vapor management system (VMS), temporary removal of the central panel, end panels and access doors, followed by the relocation of the two tent sections and replacement of the central panel, access doors, and end panels.  The temporary fabric enclosure supports, tent anchors, and VMS will be reset as the final phase of the tent position relocation. Tent Position #9 Shallow Excavation activities are scheduled to commence with stockpiling inside the tent in preparation for load-out from Tent #9 with off-site transport and disposal of impacted soils at approved and permitted disposal facilities.  Temporary sheet piling will continued to be removed and staged on-site for re-used at Tent Position #9 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.