Weekly Update for Week of March 14th

For the week of March 7th, National Grid’s contractor cored through the roof of the subsurface tunnel located under Beach Channel Drive, and grout was pumped inside. The barrier wall was re-exposed in preparation for joint flushing and grouting. Grading work for the walkway along the bulkhead also resumed.

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 7, 2016 through Friday, March 11, 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 March 14, 2016, National Grid’s contractor will continue grading and compacting the subgrade for the planting beds and walkway. The interlocks of the barrier wall will begin to be flushed and grouted.