TagMTCA(87)

Internal email chain from Chung K. Yee to Kevin Fitzpatrick (Supervisor, Industrial Permit Unit, Water Quality Program, NWRO, Washington Department of Ecology) dated August 24, 2000, commenting on draft clean fill criteria language for the 401 Certification for the Third Runway at Sea-Tac Airport. Comments address sections E6, E7c.2(b), E7c.2(e), E7c.2(f), and E7c.3, covering issues

These internal deliberative notes from 5/30/00 discuss fill and stormwater management issues related to a construction or development project, covering topics such as soil fill acceptance criteria, Best Management Practices (BMPs) for water quality, spill containment features at Tyee Pond, and monitoring requirements for dissolved metals. The notes reference coordination among multiple regulatory frameworks including Section 401, CZM, and MTCA, and address questions about impervious liner hydrologic impacts and remediation procedures. Key action items include developing an approved stormwater plan, establishing soil sampling protocols for borrow sites, and determining upfront versus incremental BMP implementation strategies.

A December 1999 letter from Port of Seattle Senior Environmental Program Manager Paul W. Agid to the Washington Department of Ecology transmits a 'potential sites' table and map identifying locations at Seattle-Tacoma International Airport where historical operations may have caused soil or groundwater contamination. The document, compiled in compliance with an Agreed Order under Washington's Model Toxics Control Act (MTCA), lists twelve potential sites including former gas stations, fuel tanks, hydrant lines, and maintenance areas. The sites were identified based on past operational activities that had since been discontinued or modified prior to current environmental regulations.

This 1999 internal memo from the Washington State Department of Ecology details the history of environmental cleanup oversight at Seattle-Tacoma International Airport, where 15 separate contaminated sites involving jet fuel and gasoline were managed individually under the state's Model Toxics Control Act. The memo describes a series of prepaid staff positions funded by the Port of Seattle to coordinate cleanup efforts with airline and pipeline companies, and the challenges in getting formal Agreed Orders signed. It concludes with an update that a key groundwater study Agreed Order was finally signed in May 1999 after receiving over 600 public comments in opposition.

In a June 1999 email chain, Washington State Department of Ecology staff member Roger Nye proposed bringing in an outside consulting firm (SAIC) to help review technical groundwater studies related to an environmental cleanup agreement (Agreed Order) at Seattle-Tacoma International Airport (STIA). The goal was to add credibility and independence to Ecology's review process, particularly in response to public demands for an independent assessment. Nye also requested that the Port of Seattle agree to cover SAIC's costs as part of the overall project expenses under state cleanup regulations (MTCA).

In May 1999, Washington State Department of Ecology staff exchanged emails discussing plans to hire consulting firm SAIC to review groundwater studies at Sea-Tac Airport, with the question of whether the Port of Seattle would fund the work remaining unresolved. The emails also note that state legislation signed by the governor allocated $250,000 to study how construction of Sea-Tac's proposed Third Runway would impact aquifers beneath the airport, a move the Port viewed as an attempt to block the runway project. This created an unusual situation where two separate Ecology divisions were conducting potentially duplicative groundwater modeling studies at the airport for different purposes.

Washington State Department of Ecology Agreed Order #97TC-N122 issued to Port Of Seattle for Seattle-Tacoma International Airport (STIA), pursuant to RCW 70.105D.050(1). Documents hazardous substance releases within the Aircraft Operations and Maintenance Area (AOMA), a half-square-mile southeast quadrant of STIA operational since 1944. Contaminants identified include jet fuel (most abundant by bulk volume), gasoline, industrial

Agreed Order #97TC-N122 issued by Washington State Department of Ecology under RCW 70.105D.050(1) directed to Port Of Seattle regarding hazardous substance contamination at Seattle-Tacoma International Airport (STIA). Documents thirteen contaminated sites within the Aircraft Operations and Maintenance Area (AOMA), a 1/2 square-mile area in the southeast quadrant of the airport, contaminated with jet fuel, gasoline,

This 1999 plan, prepared jointly by the Washington State Department of Ecology and the Port of Seattle, outlines how the public will be involved in a ground water study at Seattle-Tacoma International Airport. The study was prompted by decades of jet fuel and petroleum product releases from underground storage tanks and fuel systems in the Airport's Aircraft Operations and Maintenance Area, which contaminated soil and ground water across 13 known sites. The plan describes required and additional public participation activities, community outreach roles, and the two-phase study approach, which included computer modeling of ground water flow to assess contamination risks to public water supplies and surface water.

A 1999 internal Port of Seattle memorandum reviews soil quality data for the Hamm Creek Restoration Project site near Boeing Field, evaluating whether the material is safe to use as fill for a proposed third runway. The review found that detected contaminants — including PCBs, DDTs, mercury, and PAHs — fell below MTCA cleanup levels, leading to the conclusion that the material is suitable for upland fill use. While the soil did not meet PSDDA standards for open-water disposal, the memo notes that this distinction is not technically relevant given its intended use as runway fill.