Willow Boulevard/A-Site Operable Unit Construction Update – January 2013

In December 2012, crews completed major construction work associated with the closure of the Willow Boulevard/A-Site Operable Unit (WB/A-Site OU). Most of the work in 2012 was focused on the A-Site Landfill, where construction crews excavated PCB-impacted materials, installed the final cover system, and began restoration activities. Construction crews also completed work at the AMW-3A Area, the area east of Davis Creek, and the Willow Boulevard Landfill. See the map below for locations. Activities completed in 2012 include:

A-Site Landfill

• Excavation of PCB-impacted materials, consolidation of excavated materials, backfill of excavated areas, and final grading of the landfill surface.
• Removal of the sheet pile wall and installation of restoration stone up to the 2-year flood elevation along the river on the northern side of the landfill.
• Installation of the final cover system, construction of a permanent access road, and restoration of the A-Site Landfill as described in the post-construction restoration and mitigation plan.

AMW-3A Area

• Excavation and restoration work.

Area East of Davis Creek

• Excavation of PCB-impacted materials, backfilling, and restoration, including planting trees, spreading mulch, and watering the newly planted trees and native plant seed mix along the river.

Willow Boulevard Landfill

• Grading, soil stabilization, and erosion control.
• Completion of the landfill cover system.
• Installation of the permanent fence.
• Replanting the landfill according to the post-construction restoration and mitigation plan.

Click to enlarge image.

Crews have also finished the final steps to demobilize construction equipment and cleanup work zones. In Spring 2013 when weather is appropriate for planting, crews will complete the remainder of the restoration and habitat enhancement work. In addition, Georgia-Pacific will be installing a groundwater monitoring system later this year. Once the wells are in place, additional fencing will be added along the river at A-Site.

See photographs below of work completed at the site in 2012.

Click on photos to enlarge.

Backfilling following excavation in the area east of Davis Creek	Installation of the liner portion of the final cover system on the A-Site Landfill	Placement of habitat stone at A-Site Landfill

Installation of topsoil at the A-Site Landfill	Restoration progress at the Willow Boulevard Landfill	Erosion blanket installed at the Willow Boulevard Landfill

Permanent access road constructed at A-Site Landfill