National Grid’s Remediation Contractor continued with site mobilization and preparation activities, which included the delivery of construction materials, and additional equipment and supplies. The installation of the construction support trailers, sanitary holding tanks, office equipment, and utility connections also continued. The two foot wide Site Wide Cap and perimeter utility cut and cap excavations commenced in the northeast corner of the site;, Excavated materials were transported off-site for disposal at an approved and licensed disposal facility. Demolition of surface concrete continued in the area of the former electrical substation and utility poles were removed. The noise and vibration monitoring program was activated during the concrete breaking activities. Personal decontamination pad construction and further delineation of work zones (exclusion, decontamination, and support) continued. Maintenance of the interior access roads, parking areas, clean fill stockpile covers, and equipment and materials staging area was performed. In addition, the Remediation Contractor processed disposal facility approvals, authorizations and documentation in preparation for the scheduled utility perimeter cut and cap activities. Odor and dust suppression activities were conducted as necessary. National Grid’s consulting engineer continued to monitor the site activities with community air monitoring program (CAMP) equipment. In addition, National Grid’s consulting engineer installed, calibrated, and commenced the operation of the fixed-base perimeter CAMP system that also includes a meteorological tower and computer network system.

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 January 12, 2009 through January 16, 2009, six portable CAMP locations and the six fixed based CAMP units were in-use and measured TVOC and PM10. Fifteen-minute averages for TVOC and PM10 data remained in Operational Condition. No elevated readings for TVOC or PM10 were reporting during the weekly 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 January 19, 2009 through January 23, 2009, the final installation of the support trailers and utility connections (i.e., phone, cable, water, and sanitary tanks) is scheduled for completion. Perimeter cut and cap excavation activities are scheduled in the northeast corner of the Site with off-site transport and disposal of excavated material at an approved and licensed disposal facility. Demolished concrete will be relocated on-site and stockpiled for future crushing in accordance with the NYSDEC approvals. Personnel decontamination shelter, equipment decontamination station, and stabilized construction entrance installation activities are scheduled for completion. 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.