Installing temporary sheeting at future tent position

National Grid’s Remediation Contractor continued with site remediation activities, which included the delivery of construction materials, imported backfill material (stone and common fill), and construction equipment and supplies. The Tent Position #2 Shallow Excavation and load-out remedial activities was completed within the temporary fabric enclosure as well as the off-site transport of impacted material to approved and permitted disposal facilities.  Operation of the Vapor Management System (VMS) at Tent Position # 2 continued and worker health and safety monitoring activities were conducted at the site, as necessary.  The placement and compaction of imported backfill material continued within the Shallow Excavation Area at Tent Position #2.  Installation of temporary steel sheeting continued at the proposed Tent Positions #3 through #6.   

Maintenance of the decontamination areas, work zones, on-site gravel access roads, parking areas and material staging areas, the 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 engineer continued to monitor the site activities with the fixed base community air monitoring program (CAMP) equipment, as well as with noise and vibration monitors.

Backfill to restore excavation under tent at Position 2.

During the period from July 27, 2009 through August 2, 2009, six fixed base CAMP units and one portable CAMP unit were in-use and measured TVOC and PM10. Fifteen-minute averages for both TVOC and PM10 data remained in the Operational Condition. No elevated TVOC and PM10 measurements were reported for the weekly CAMP 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 August 3, 2009 through August 7, 2009, the delivery of imported clean backfill material (stone and common fill), placement and compaction within the Tent Position # 2 Shallow Excavation Area will continue. On-going temporary fabric enclosure and VMS operation and maintenance will continue at Tent Position #2.  Temporary fabric enclosure improvements (southern end replacement and northern end double door enhancements) are scheduled after the relocation from Tent Position #2 to Tent Position #3. Installation of temporary sheet piling will continue at Tent Positions #3 through #6. Odor and dust suppression activities will be conducted as necessary. Work zone delineation, Site maintenance activities, CAMP operation, and noise and vibration monitoring activities will continue.