This action is to resolve claims for past costs incurred under CERCLA against the Riverview Trenton Railroad Company (RTRR). The RTRR site consists of approximately 76 acres and is located fifteen miles southwest of Detroit, Michigan. On June 17, 2010, EPA issued a UAO to RTRR that required it to investigate and determine the source of high pH leachate, and remove or contain the source. RTRR refused to perform the work. On November 30, 2010, EPA began removal activities.