Notes
Letter dated February 16, 2001 from Peter Willing, Ph.D., Water Resources Consulting L.L.C., to Jonathan Freedman (U.S. Army Corps of Engineers) and Ann Kenny (Washington State Department of Ecology), submitted on behalf of the Airport Communities Coalition (ACC), reviewing water quality and water management aspects of the Sea-Tac Airport third runway expansion plan. Exhibit AR021162. Analyzes the Comprehensive Stormwater Management Plan (Parametrix, December 2000), Annual Stormwater Monitoring Report (1999–2000), Low Streamflow Analysis (Earth Tech, December 2000), NPDES Permit No. WA-002465-1, Des Moines Creek Basin Plan, and King County Surface Water Design Manual. Key findings: Port Of Seattle stormwater diversion to industrial waste system violates Governor Locke’s June 30, 1997 certification protecting Miller Creek and Des Moines Creek instream flows; existing BMPs failing to meet Washington State Water Quality Standards; streams on 303(d) impaired waters list; 50-year soil contaminant accumulation; Clean Water Act Section 401 and Section 404 approval not warranted; stormwater discharges routed to Class AA streams in Puget Sound via Renton treatment plant.