Editing North Warning System (section)

== Site remediation==
The former DEW Line sites were operated using practices and materials accepted by the environmental standards of the time. With their closure and many of them rebuilt as NWS sites, a clean-up project was undertaken to remove surplus infrastructure, treat chemically contaminated soils, and stabilize landfill sites. The clean-up was designed to keep chemical contamination from the DEW Line sites out of the [[Arctic]] food chain, and ensure that the sites are restored to an environmentally safe condition. In 1989, the Canadian [[Department of National Defence (Canada)|Department of National Defence]] (DND) started investigating the environmental conditions of the DEW Line sites and commenced clean-up work at two sites in 1996. The clean-up of 21 sites was scheduled to be completed in 2013. In March 2014 DND announced the remediation project was complete.