TagACC(1534)

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.

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.

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held November 13, 2000, 1:00–3:30 PM. Attendees include representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny, Dave Garland), Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith), King

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

Final draft meeting notes from Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held November 7, 2000, prepared by Kate Snider of Floyd & Snider Inc. Attendees included Ray Hellwig, Kevin Fitzpatrick, and Ann Kenny from Washington Department of Ecology; Elizabeth Leavitt from Port Of Seattle; David Masters from King County; and Paul Fendt and

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 —

This 2000 Washington State Department of Ecology policy document establishes procedures for how stormwater discharges must comply with water quality standards under Sections 401 and 402 of the Federal Clean Water Act. It outlines how Best Management Practices (BMPs), including Supplemental Treatment, should be applied to control stormwater pollution, and defines how compliance decisions are made for various permit types. The policy applies to Ecology Water Quality and SEA Program staff when reviewing or permitting projects that have stormwater impacts.

Port Of Seattle report (AR 043696, Volume 1) examining effects of runway deicing chemicals on dissolved oxygen in receiving waters at Seattle-Tacoma International Airport for the 1999-2000 winter season. Documents ground deicing chemical applications including potassium acetate (PA, Cryotech E36 LRD), sodium acetate (SA), and calcium magnesium acetate (CMA) on airfield, ramp, and landside roadways.

This October 31, 2000 agenda document outlines a meeting between the Port of Seattle, the Department of Ecology, the Attorney General's Office, and Seattle Public Utilities to address water rights issues related to flow augmentation in Des Moines Creek, connected to the Sea-Tac Airport Third Runway project. The meeting focused on identifying potential sources of stream flow augmentation water, including the SPU Highline Well Field, Highline Water District wells, detained stormwater, and reclaimed water. Key discussion points included whether water right changes were necessary, what approvals were required from the Department of Ecology, and how to develop an action plan for resolving outstanding legal and regulatory issues.

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held October 31, 2000, 8:00–11:00 AM. Attendees included representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny), Port Of Seattle (Michael Cheyne, Elizabeth Leavitt, Keith Smith), King County