Weekly Update: January 18 - January 22, 2010

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Jan 20 Moving the Tent

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..  Temporary sheeting was pulled from the former Tent Position #8 and re-driven in the next Tent Position. Tent Position relocation activities included the movement of the two temporarily staged tent sections north to the next Tent Position, and replacement of the central panel, access doors, and end panels.  The temporary fabric enclosure supports, tent anchors, and VMS were also reset during this phase of the Tent Position relocation.

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 engineers continued to monitor the site activities with the fixed base community air monitoring program (CAMP) equipment.

During the period from January 18, 2010 through January 24, 2010, six fixed base CAMP units and one portable CAMP unit 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 readings for TVOC or PM10 were reporting for this monitoring period. Weekly Reports that summarize the CAMP data and the elevated measurements can be found as a separate tab in the Weekly Report Archive section.

For the week of January 25, 2010 through January 29, 2010, the next Tent Position Shallow Excavation activities are scheduled to commence with off-site transport and disposal of impacted soils at approved and permitted disposal facilities. Delivery of imported clean backfill material (stone and common fill) and backfill material placement and compaction will commence inside the next Tent Position. Odor and dust suppression activities will be conducted as necessary. Work zone delineation, site maintenance activities, and CAMP operation monitoring activities will continue.