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EXH 448: Email Thread — 3rd Runway Fill Arsenic Lead Levels TSP Project Concern (Jan 10, 2002)

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Sea-Tac Airport
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A January 2002 internal email from Washington State Department of Ecology staff raises concerns about elevated levels of metals, particularly lead and arsenic, in fill material being used for the 3rd Runway construction at Sea-Tac Airport. The issue was flagged by the City of Burien as a community sensitivity, with worries that it could become a broader concern for neighboring communities including SeaTac, Normandy Park, and Tukwila. The email seeks clarification on the rationale behind allowable arsenic and lead levels in the runway fill, drawing a comparison to stricter restrictions previously placed on arsenic exports from the Maury Island gravel pit.

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Exhibit 448 (AR 022825). Internal Washington State Department of Ecology email chain dated January 10, 2002, from Norm Peck (Toxics Cleanup Program, Northwest Regional Office) to Steve Alexander and Raymond Hellwig, forwarded to Ann Kenny. Peck raises concern about the rationale for allowing elevated levels of arsenic and lead in fill material for the Third Runway at Sea-Tac Airport. References City of Burien raising this as a sensitive community issue related to wide-area contamination in SW King County. Also references Lone Star/Glacier NW Maury Island gravel pit expansion EIS and conditions designed to prevent arsenic export from that pit to fill sites. Requests identification of Ecology staff making decisions on allowable arsenic (As) and lead (Pb) levels in third-runway fill. Tags: arsenic, lead, fill dirt, MTCA, Third Runway, TSP (Toxics Site Program), Vashon Island, Maury Island.

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