TagSea-Tac Airport(2023)

Draft Subsurface Conditions Data Report for Phase 4 Fill of the Third Runway Embankment at Sea-Tac International Airport, prepared by Hart Crowser (HartCrowser) for Port of Seattle and HNTB, dated November 29, 2000, project J-4978-28, AR 046207. Report covers generalized geologic conditions, subsurface soil conditions, hydrogeologic conditions, field exploration methods including auger borings, Standard Penetration

Letter dated November 27, 2000 from Samuel R. Casne, Natural Resources Manager at Shannon & Wilson, Inc., to Erik Stockdale of the Washington State Department of Ecology (Shorelines & Environmental Assistance Program) in Bellevue, WA, proposing consulting services for review of the Natural Resource Mitigation Plan (NRMP) for the SeaTac Third Runway Project. The proposal,

Letter dated November 22, 2000 from Bill Garrity, Executive Director of the Consulting Engineers Council of Washington (CECW), to Erik Stockdale at the Washington Department of Ecology (AR 018492–018493). The letter addresses the Request for Bid (RFP dated November 14, 2000) for review of the Natural Resource Mitigation Plan (NRMP) for the SeaTac Third Runway

Letter and proposal from Dyanne Sheldon, Principal of Sheldon & Associates, Inc. (Seattle, WA), addressed to Erik Stockdale at Washington State Department of Ecology, dated November 21, 2000, submitting a proposal to review the Natural Resource Mitigation Plan (NRMP) for the Sea-Tac Third Runway. The letter discusses cost estimate exceeding the provided $18,000 budget, justifying

This document contains the revised agenda for the first Technical Review Board (TRB) meeting held November 16-18, 2000, concerning the Seattle-Tacoma International Airport Third Runway Project. The three-day meeting covered geotechnical and engineering topics including subsurface conditions, subgrade improvements, seismic design, MSE wall design, and general embankment fill. The agenda also included a site tour and a session for the TRB to summarize comments and recommendations on the adequacy of investigations and construction methods.

A November 2000 letter from the Washington State Department of Ecology to Seattle-Tacoma International Airport summarizes the completion status of environmental tasks required under Agreed Order 97TC-N122. The order mandated a comprehensive groundwater study of the Airport Operations and Maintenance Area (AOMA), including hydrogeological research, contamination mapping, and development of groundwater flow and contaminant transport models. While several research and data-collection tasks were completed, key items such as identifying unknown contamination sources, developing operational groundwater and transport models, and preparing a final Phase I Groundwater Study Report remained incomplete.

Email dated November 15, 2000 from Chung K. Yee to Kevin Fitzpatrick regarding Sea-Tac fill dirt, specifically the ‘Black’ virgin site where soil samples exceeded Method B 100X groundwater standards under MTCA (Model Toxics Control Act). The site holds 200,000 to 300,000 cubic yards of fill and is workable during winter months. Beth Clark arranged

A November 2000 memo from Washington State Department of Ecology's Roger Nye raises concerns that the Port of Seattle failed to adequately identify potential soil and groundwater contamination sites at Sea-Tac Airport, as required by an Agreed Order. Nye outlines four key deficiencies, including the Port's failure to account for historical use of chlorinated solvents in aircraft washing, overlooked fueling facilities, and incomplete identification of contamination sources based on historical operations rather than just historical facilities. The memo calls for a thorough, honest effort to identify all potential contamination areas that could pose risks to nearby drinking water wells and surface waters.

Memorandum dated November 9, 2000 from Barry Chen, P.E. of Hart Crowser to Jim Thomson, P.E. of HNTB (J-4978-30), reviewing RECo’s 30% design for NSA, West, and South MSE (Mechanically Stabilized Earth) walls for the Third Runway Embankment Project at Sea-Tac Airport. Using SLOPE/W limit equilibrium analyses and FLAC displacement-based modeling, Hart Crowser identified marginal

Email chain (AR 033715, ECY00000691) between Tom Luster and supervisor Paula Ehlers, dated November 7, 2000, discussing a November 1, 2000 Highline Times article titled ‘Opponents leery as third runway reviewers changed.’ Luster states he was incompletely quoted by reporter Chris Gower regarding his feelings about being reassigned from the third runway review project —