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Draft memorandum dated April 25, 2000, from Doug Henderson and Linda Logan (job number 556-2912-001) to Port Of Seattle project files, summarizing range-finding toxicity test results for the water-effect ratio (WER) study for copper in streams receiving Sea-Tac Airport (STIA) stormwater. Covers sampling at five sites — Miller Creek Upstream, Miller Creek Detention Facility, Northwest Ponds Outlet, Northwest Ponds Inlet, and Des Moines Creek Weir — during a qualifying storm event on April 15, 2000. Describes WER calculation methodology using Daphnia magna LC50 tests, copper sulfate pentahydrate (CAS#7758-99-8) stock solution, nominal copper concentrations, and EPA/600/4-90/027F (August 1993) protocol. Tests conducted by Parametrix toxicology laboratory; samples collected by Taylor Associates using ISCO flow-weighted composite samplers. Exhibit identifier AR026666.

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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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