"It's been a long time coming, but work is finally under way to contain pollution from one of Portland harbor's dirtiest sites, the former home of a DDT and rocket-fuel maker that's loaded with the full suite of harbor toxics."

"The heavy-duty construction at Arkema, which covers 54 acres along the west side of the Willamette River, is designed to keep contaminated groundwater and stormwater from streaming into the river.

The headliner: a 1,650-foot-long groundwater containment wall buried to bedrock up to 85 feet down. Wells behind the wall will capture contaminated groundwater and send it to a new treatment plant. A containment pond will trap and clean toxic stormwater. "

Scott Learn reports for the Portland Oregonian October 23, 2012. [2]