Excavation dewatering system

No work was conducted on site during the holiday break from December 23, 2008 through to January 1, 2009. Sevenson Environmental, National Grid’s Remediation Contractor, had buttoned down the site for the holiday break.

Following the holiday break, Sevenson continued mobilization of equipment, materials, and winterization and heat tracing of the water treatment plant. Last week, no soil was transported from the site. Sevenson’s dewatering subcontractor, Griffin, completed the installation of the excavation dewatering system this week. The well points will be used to pump groundwater from the excavation to the waste water treatment plant.

Two-Week Outlook

Sevenson is expected to initiate transportation and the erection of the temporary fabric structure (tent).  Site clearing activities will be initiated to prepare for installation of a temporary fabric cover. Maintenance (winterization and heat tracing) and operation of the water treatment plant will be ongoing for the next week.

Sevenson’s dewatering subcontractor, Griffin, will start the operation of the excavation dewatering system this week. The well points will be used to pump groundwater from the excavation to the waste water treatment plant.

National Grid contractors will continue working in Long Island Avenue to address sewer line issues. Work will continue to complete an inspection of the sewer line and conduct any necessary repairs.

General hours of operation will continue to be Monday through Friday, 7:00 AM to 5:00 PM. To maintain the ambitious schedule for the project, beginning Saturday, January 3, for a period of at least two months, work on the site will also be conducted on Saturdays, between 8:00 AM and 6:00 PM.