On June 13, 2014, Region 10 signed an Administrative Order on Consent and Settlement Agreement with the Port of Tacoma (Port). Pursuant to the requirements of CERCLA, in this Order the EPA is directing the Port to investigate the source and extent of a release of tributyltin (TBT) into the Blair Waterway under one of their piers. In addition to conducting more sampling, the Port is to produce a Removal Site Evaluation, which the EPA will use in determining whether future action is warranted. The Order also requires the Port to cover the EPAÂs costs.