Notes
Exhibit 372 (AR 021364). Letter dated February 16, 2001 from J. Strand of Columbia Biological Assessments, Richland WA, submitted to USACOE Project Manager Jonathan Freedman and Washington State Department of Ecology specialist Ann Kenny on behalf of the Airport Communities Coalition (ACC). Evaluates whether the Port Of Seattle has provided a scientifically defensible basis for issuance of a Clean Water Act Section 404 permit for the STIA third runway project (Public Notice No. 1996-4-02325). Addresses impacts to Miller Creek, Walker Creek, and Des Moines Creek, including chinook salmon (federally threatened), coho salmon, chum salmon, and cutthroat trout. Identifies deficiencies in Port’s environmental analysis including: elevated water temperatures and low dissolved oxygen in relocated Miller Creek; fish stranding and mortality risks from summer low flows and spawning gravel additions; chemically contaminated fill (PCBs, DDT) from Hamm Creek Restoration Project stockpiled at Seattle-Tacoma International Airport; violations of water quality criteria for copper and zinc in stormwater discharges; inadequate assessment of de-icer effects; and flawed use of Model Toxics Control Act (MTCA) Soil Cleanup Levels and NPDES permit modifications. Recommends transport, fate, and effects modeling of metals and other stormwater chemicals before permit decision.