Notes
A letter from Columbia Biological Assessments to the U.S. Army Corps of Engineers and Washington State Department of Ecology raising concerns about the Port of Seattle’s Soil Fill Acceptance Criteria for the proposed third runway at Sea-Tac Airport. The letter details findings that soils from the Black River Quarry transferred to STIA exceeded MTCA Method A Soil Cleanup Levels for total petroleum hydrocarbons, and that the Port delayed reporting these results. The author concludes that the fill acceptance process remains flawed and recommends against approval under Clean Water Act Sections 401 and 404.
