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In October 2000, Washington State Department of Ecology staff member Tom Luster raised concerns about the adequacy of Ecology's Clean Water Act Section 401 certification review for the proposed Sea-Tac Airport expansion. Luster identified multiple unresolved issues, including insufficient stormwater pollution controls, unevaluated wetland and water quality impacts, and conflicts between Ecology's approach and federal Clean Water Act requirements. He warned that failing to address these issues could result in a legally indefensible permit and degraded water quality in nearby creeks and wetlands.

This October 2000 internal memo from Roger Nye to TCP Section Head Steve Alexander explains the history of the Agreed Order between Washington State Ecology and the Port of Seattle regarding environmental cleanup at Sea-Tac Airport. It describes how the Port agreed to conduct a large-scale groundwater evaluation under an Agreed Order, with the understanding that a risk-based cleanup remedy scenario would be developed if contamination risk proved low. The memo also notes that the Agreed Order intentionally excluded language about remedial actions, with Ecology reserving the right to formally intervene if cleanup became necessary.

STIA Construction Site Stormwater Monitoring reports dated 10/16/00 and 10/20/00, samplers JL/RS and JB/RS. Documents turbidity and pH measurements at multiple Sea-Tac Airport construction sites including Logistics Site Development (Tyee Pond, Des Moines Creek outfall), MWS Lagoon 3 Construction, Airfield Improvement (SDS3-594, SDS-6, SDS-7), Dobbs Flight Kitchen Remodel (SDE4-611, SDE4-607, SDE4-615, SDE4-601, SDE4-602), Booster Pump

These are the official draft meeting notes from October 13, 2000 negotiations between the Port of Seattle, the Washington Department of Ecology, and King County regarding the 401 Water Quality Permit for Sea-Tac Airport's proposed third runway. The meeting covered technical issues including stormwater management, natural resource mitigation planning, and a master list of permit issues tracked by resolution status. Representatives from multiple agencies worked to resolve outstanding questions about detention sizing, wetland hydrology, and environmental compliance requirements.

Memorandum dated October 13, 2000 from Michael Bailey P.E. and Michael Kenrick P.E. of Hart Crowser to Jim Thomson P.E. at HNTB (project J-4978-06), analyzing infiltration into the proposed Third Runway embankment at Sea-Tac Airport and effects on shallow water-bearing zone base flow to Miller Creek and adjacent wetlands. Analysis uses three sequential models —

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the Sea-Tac Airport Third Runway 401 Permit Negotiations held October 13, 2000. Attendees include representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Tom Luster, Erik Stockdale), Port Of Seattle (Michael Cheyne, Elizabeth Leavitt, Keith Smith), King County (Kelly

Email chain AR 018494 in which Erik Stockdale (Washington State Department of Ecology, ESTO461@ECY.WA.GOV) sends internal memo to Gail Terzi and Jonathan Freedman (Army Corps of Engineers) outlining status of the natural resource mitigation plan and associated documents for Sea-Tac Airport expansion. Stockdale notes the Port of Seattle is objecting to Ecology’s choice of consultant

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the Sea-Tac Airport Third Runway Section 401 Permit Negotiations meeting held October 10, 2000, 9:00–4:00. Attendees included representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Tom Luster, Chung Ki Yee), Port Of Seattle (Michael Cheyne, Elizabeth Leavitt, Keith

A October 9, 2000 internal memo from Tom Luster to Ecology's SeaTac reviewers outlines a draft list of unresolved issues related to the SeaTac Airport 401 water quality certification review. The issues cover stormwater management, streamflows, wetland impacts, and environmental mitigation plans, including concerns about cumulative impacts on Des Moines Creek and Miller Creek from several interconnected proposed projects. The memo notes that some issues may require only minor document clarifications while others may need significant new documentation or development of formal 401 permit conditions.

Internal memo from Erik Stockdale (Ecology) to Tom Luster, Kevin Fitzpatrick, Ray Hellwig, Dave Garland, Joan Marchioro, and Jeannie Summerhays, dated October 9, 2000, summarizing 23 remaining issues with the SeaTac Natural Resource Mitigation Plan (NRMP) for the Third Runway project at Seattle-Tacoma International Airport. Topics include: Ecology review transition and 3rd party wetland consultant