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.   Shallow Excavation Area remedial activities continued inside the temporary fabric enclosure at Tent Position # 1 in the southeast corner of the site. Load-out and off-site transport of impacted material continued from Tent Position # 1 to approved and permitted disposal facilities.  Record of construction surveys and construction stake-out surveys continued as site remediation activities progress. In addition, maintenance of the temporary fabric enclosure was conducted at Tent Position # 1 in the southeast corner of the Site.  Vapor Management System (VMS) operation continued at Tent Position # 1 and worker health and safety monitoring activities continued at the site. Soil borings were advanced as part of the geotechnical subsurface investigation along the alignment of the On-Site Waterloo Barrier Wall and at the 2006 Demonstration Area.

Personnel and equipment decontamination pads were utilized throughout site operations.  Further delineation of work zones (i.e., exclusion, decontamination, and support) continued, as required. Maintenance of the on-site gravel access roads, parking areas and material staging areas, the imported backfill material (i.e., clean fill) stockpile covers, and the perimeter privacy screen continued.    Maintenance of engineering controls 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.

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 June 1, 2009 through June 7, 2009, six fixed base CAMP units and one portable CAMP unit were in-use and measured TVOC and PM10. Fifteen-minute averages for 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 June 8, 2009 through June 12, 2009, the geotechnical subsurface investigation along the alignment of the on-site Waterloo Barrier Wall will be completed. Shallow Excavation Area remedial activities will continue at Tent Position #1 with off-site transport and disposal of impacted soils at the approved and permitted disposal facilities. Delivery of imported clean backfill material (stone and common fill) will continue. Work zone delineation and maintenance of the on-site gravel access roads, truck lining and tarping stations, personal and equipment decontamination pads, and the truck scale will continue. National Grid’s consulting engineer will continue to monitor the site activities with noise and vibration monitoring equipment, as necessary. Maintenance of engineering controls and SESC measures will continue, as necessary.  Work zone air monitoring, VMS system inspection, and performance monitoring will continue.  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.