TagPort Of Seattle(2611)

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 April 30, 1999 memo documents a meeting between Corps of Engineers staff and Port of Seattle officials to discuss using land near Sea-Tac Airport's proposed 3rd runway as a disposal site for approximately 60,000 cubic yards of material from the Corps' Turn Basin #3 project. Key logistics covered included hauling up to 1,000 cubic yards per day starting in late July 1999 using no more than six trucks, with no fees charged for dumping on Port property. Outstanding questions included whether the Corps' Regulatory Branch — which was simultaneously reviewing a permit for the 3rd runway — might have conflicts of interest in using that same site, and what formal agreement would be needed between the two agencies.

A 1999 internal U.S. Army Corps of Engineers email discusses plans to dispose of approximately 60,000 cubic yards of excavated material from a Duwamish River habitat restoration project (Turn Basin #3) at a Port of Seattle site designated for the proposed Third Runway. The email raises concerns about whether this collaboration with the Port could compromise the Corps' ability to issue an impartial permit decision for the Third Runway project, while noting the arrangement could save the restoration project around $200,000 in disposal costs.

This is a Procedure Manual for stormwater monitoring at Sea-Tac International Airport, developed by Port of Seattle Environmental Services to comply with NPDES Permit WA-002465-1. It outlines sampling locations, monitoring schedules, deicing event protocols, and quality assurance procedures for collecting and reporting stormwater data. The manual covers topics ranging from automatic and manual sampling methods to laboratory accreditation and discharge monitoring report requirements.

In April 1999, the Washington State Department of Ecology requested contract services to independently review a groundwater study being conducted by the Port of Seattle at Sea-Tac Airport. The study aimed to determine whether groundwater contamination at the airport posed a risk to nearby surface waters and public water wells. Contract experts were needed to evaluate the Port's conceptual groundwater models, three-dimensional MODFLOW computer simulations, and proposed field monitoring work.

A April 17, 1999 outgoing telephone call was made to Kevin Fitzpatrick at the DOE regarding Project No. 55-2912-01(6), the POS Third Runway. The caller asked whether Ecology could proceed with reviewing the outline for the WER workplan and their approach to the mixing zones at the same time as evaluating BMPs at existing outfalls. Fitzpatrick responded that this was not acceptable to Ecology, stating that BMPs for existing outfalls must be addressed or confirmed as met before other project activities could proceed.

A April 14, 1999 email from Mike O'Neil of Metro King County discusses plans to use a Port of Seattle runway at Sea-Tac Airport as a disposal site for dredged material from Turning Basin #3 on the Duwamish/Hamm Creek project. The Port's contact, John Rothnie, found the material geotechnically and environmentally acceptable, but noted that sending more than 6 trucks per hour could trigger a special permit requirement from the City of SeaTac. Hauling was estimated to begin in June 1999 and conclude in August, with contingency plans for dewatering especially wet material at an alternative commercial site.

Email dated April 12, 1999 from Erik Stockdale to Raymond Hellwig and Tom Luster (cc: Erik Stockdale) regarding bird strike hazard (BASH) monitoring at Sea-Tac Airport in-basin mitigation sites Vacca Farm and Tyee Golf Course. Stockdale recounts conversation with Jim Kelley (FAA) about the need for baseline ‘before’ bird use data at mitigation sites prior

This document consists of a fax transmission from Parametrix, Inc. to Scott Tobiason at the Port of Seattle, dated March 29, 1999, transmitting water quality data logs and flow weighting calculation worksheets for WGR (water quality) samples collected from receiving streams on February 22, 1999. The attached field data logs record measurements such as pH, temperature, dissolved oxygen, and water levels at a site designated 'WC,' along with observations of rain, sheen, and water color during sampling. A flow weighting calculation worksheet for the 'Walker' site summarizes subsample volumes and calculates a total storm flow of 33,030 units for a 30-inch pipe.