Slurry Wall and Cover System for Redevelopment of the McColl Superfund Site
The McColl Superfund site is a 20-acre former industrial waste disposal facility. From 1942 to 1946, petroleum sludges and other wastes from the production of high octane aviation fuel were placed in 12 unlined pits. In the 1950s, in an effort to control odors and gaseous emissions from the site, several of the pits were covered with diesel oil-based drilling mud. The site was placed on the National Priorities, or Superfund, List in 1982. In 1984, under a CERCLA Unilateral Administrative Order (UAO), the U.S. EPA directed the Potentially Responsible Parties (PRPs) to implement a remedy consisting of excavation and off-site disposal of hazardous wastes that was estimated to cost in excess of $200 million. New residential development and a golf course surrounding the site complicated the remediation, and tarry seeps and malodorous emissions were emanating from the site.
