TagSea-Tac Airport(2025)

Final Natural Resource Mitigation Plan (NRMP) prepared by Parametrix, Inc. for the Port Of Seattle, covering Master Plan Update Improvements at Seattle-Tacoma International Airport (Sea-Tac Airport). Document number 556-2912-001 (03), dated November 2001. Administrative Record document AR 029275–AR 029277.

A study at Seattle-Tacoma International Airport found that galvanized metal roofing on cargo buildings was the primary source of elevated zinc levels in the airport's stormwater runoff, which drains into salmon-bearing streams including Miller Creek and Des Moines Creek. Researchers used whole effluent toxicity (WET) testing and source-tracing methods to identify the problem, focusing on one outfall (SDN1) that consistently showed higher zinc concentrations and toxic effects on aquatic organisms. The findings prompted the Port of Seattle to investigate remediation options as part of its stormwater pollution prevention program under its NPDES permit.

A October 26, 2001 transmittal from Parametrix, Inc. to the U.S. Army Corps of Engineers (ACOE) provides responses to the ACOE's request for additional information regarding the Seattle-Tacoma International Airport (STIA) Master Plan Update (MPU) Natural Resource Mitigation project. The package includes maps and aerial photographs identifying wetland areas and acreages within Borrow Area 1, submitted on behalf of the Port of Seattle.

Hart Crowser, Inc. subsurface conditions data report prepared for HNTB, project number 4978-52, dated October 22, 2001, covering the haul route and Borrow Areas 3 and 4 for the Third Runway Project at Sea-Tac International Airport, Seatac, Washington. Report by Reese P. Hastings (Senior Associate) and Joe N. Morrice (Senior Staff Hydrogeologist) covers generalized geologic

Joint declaration filed October 8, 2001 in PCHB No. 01-133 and No. 01-160 by nine Washington State legislators — Senator Julia Patterson (33rd District), Senator Dow Constantine (34th District), Senator Tracey Eide (30th District), Representatives Shay Schual-Berke, Karen Keiser, Joe McDermott, Erik Poulsen, Mark Miloscia, and Maryann Mitchell — opposing Port Of Seattle’s claim of

Fax cover sheet and letter dated October 2, 2001 from Port Of Seattle (Elizabeth Leavitt, Manager Aviation Environmental Programs) to Ms. Ann Kenny, Washington Department of Ecology Northwest Regional Office, transmitting two documents in satisfaction of §401 Water Quality Certification Order #1996-4-02325 Condition F.1. Condition F.1 requires proposed construction BMPs to prevent interception of contaminated

Letter dated October 2, 2001 from Elizabeth Leavitt, Manager Aviation Environmental Programs, Port Of Seattle, to Ann Kenny at Washington Department of Ecology Northwest Regional Office, submitting two documents in satisfaction of §401 Water Quality Certification Order #1996-4-02325, Condition F.1, for Seattle-Tacoma International Airport (STIA). Attached document: ‘Proposed Construction BMPs To Prevent Interception of Contaminated

Port Of Seattle filing in PCHB No. 01-133 opposing Airport Communities Coalition (ACC) motion for stay, received October 1, 2001 by the Environmental Hearings Office. Includes Declaration of Mayor Paul Schell of Seattle, who previously served nine years as Port Of Seattle Commissioner, addressing regional air transportation capacity and economic impacts related to Seattle-Tacoma International

Fill Criteria Derivation Chart (Exhibit E) for Third Runway Embankment at Sea-Tac Airport, revised 9-28-01. Charts fill dirt criteria for constituents including antimony, arsenic, barium, beryllium, chromium, copper, lead, mercury, selenium, silver, thallium, diesel, and heavy oils against Ecology criteria, FWS drainage layer cover values, and FINAL drainage layer cover values. References WAC 173-340-747(3)(a) and

Draft maps prepared by Parametrix, Inc. on September 28, 2001, showing impervious and pervious surface coverage for the Sea-Tac Airport area. Two maps labeled imprv94 and imprv04 depict land surface conditions with dark shading indicating impervious surfaces and light areas indicating pervious surfaces. Documents are part of Administrative Record AR 051192 and AR 051193, likely