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NPDES Waste Discharge Permit No. WA-002465-1 issued by Washington State Department of Ecology (Northwest Regional Office) to Port Of Seattle for Seattle-Tacoma International Airport, King County, WA. Permit covers industrial wastewater discharge to Puget Sound (Outfall 001), stormwater discharges to Des Moines Creek (Outfalls 002-005, 009, 010, 014, 015), Miller Creek (Outfalls 006-008, 011), City of SeaTac storm sewer tributary to Gilliam Creek and the Green River (Outfalls 012-013), Midway Sewer District sanitary sewer (miscellaneous blowdown), Walker Creek (construction stormwater), and Gilliam Creek (construction stormwater). Issued February 20, 1998; effective March 1, 1998; expiration June 30, 2002; modified May 29, 2001. Conditions include effluent limitations, monitoring requirements, deicing/anti-icing fluid usage, NPDES, Clean Water Act, RCW Chapter 90.48, stormwater drainage system, ground water discharges, and compliance schedules.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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