Weekly Update for Week of April 4th

National Grid’s contractor has finished the sub-base for the asphalt walkway and the concrete bench pads. The grouting of the interlock joints has also been completed. The drilling equipment to install the recovery wells was mobilized to the site and 3 recovery wells have been installed.

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 “Alert, Response and 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) 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 Monday, March 28, 2016 through Friday, April 1, 2016, two portable CAMP stations were in-use and measured TVOC and PM10. Fifteen-minute averages for TVOC and PM10 data remained below the Action Limit.

For the week of April 4, 2016, the concrete for the bench pads and the asphalt walkway will be installed. Installation of the recovery well located on the south side of the barrier wall alignment will continue.