TagPCHB(607)

A water resources consultant wrote to the Washington State Department of Ecology in September 2000, arguing that Seattle Public Utilities' Lake Youngs water supply is too warm to effectively cool Des Moines Creek during summer months. Temperature data showed that Lake Youngs outlet water exceeds 16°C from mid-June through mid-October — the exact period when cooler stream temperatures are needed — reaching as high as 20°C in summer 2000. The letter concludes that the Port of Seattle's proposed flow augmentation facility for Des Moines Creek cannot rely on this water source for temperature improvement, undermining the Port's claims about its water supply plan.

This document contains a September 2000 email exchange regarding the proposed expansion of Lagoon #3 in the Sea-Tac Airport Industrial Wastewater System (IWS), in which consultant Bill Rozeboom follows up on unresolved comments submitted to the Washington State Department of Ecology. The attached July 31, 2000 comments raise concerns about discrepancies in the lagoon's design capacity, the risk of frequent overflow into Des Moines Creek, and potential wildlife hazards near aircraft movement areas that may violate FAA guidelines. Additional issues flagged include incomplete construction plans, unaddressed lagoon deficiencies, and the apparent overlap of the lagoon expansion project with 3rd runway construction activities affecting nearby wetlands.

A biological assessments consultant, writing on behalf of the Airport Communities Coalition, critiques the Port of Seattle's revised plan to use City of Seattle drinking water to boost summer flows in Des Moines Creek near Sea-Tac Airport. The letter raises concerns that the plan inadequately addresses the toxicity of fluoride and residual chlorine in treated drinking water, which can harm fish and other aquatic life at very low levels. The consultant also warns that differences in temperature, pH, and dissolved oxygen between the makeup water and the creek could cause serious ecological damage if not corrected before augmentation begins.

This September 2000 preliminary design report, prepared by Kennedy/Jenks Consultants for the Port of Seattle, outlines a plan to augment water flow in Des Moines Creek near Seattle-Tacoma International Airport. The report covers facility configuration, process components such as backflow prevention, dechlorination, and aeration systems, as well as an evaluation of chemical dechlorination alternatives. The project was designed to improve creek water quality by treating and releasing water in a controlled manner.

This document contains reference data for the Seatac Groundwater Study, compiled by Associated Earth Sciences, Inc. The dataset, totaling 10.4 MB across 17 files, includes flat-file format tables covering bore holes, water levels, geology, hydraulic parameters, and well segments related to groundwater conditions in the Sea-Tac area. The materials were submitted as a legal exhibit and are part of the broader environmental record associated with Sea-Tac Airport.

This June 2000 report by Pacific Groundwater Group examines the hydrological impacts of proposed runway fill construction at Seattle-Tacoma International Airport. It covers groundwater conditions, surface water management, effects on local wetlands and fish habitat in Miller and Walker Creeks, and reviews stormwater control proposals. The study was prepared for the Washington State Department of Ecology to assess how the Third Runway embankment fill would affect the surrounding hydrologic environment.

This document summarizes soil contamination test results for fill material taken from the First Avenue Bridge site, collected between October 1999 and May 2000. Samples were tested for petroleum hydrocarbons (diesel and heavy oil ranges) as well as RCRA 8 metals and other contaminants, with results indicating varying levels of heavy oil detected across samples. The table notes which soil samples were ultimately placed at the Third Runway construction site at Sea-Tac Airport, with several samples excluded due to contamination concerns.

A May 2000 laboratory report from Columbia Analytical Services, Inc. presents water and sediment quality monitoring results for the Airport Communities Coalition in Richland, Washington. Samples were collected on April 19, 2000, and analyzed for metals, ammonia, pesticides, semivolatile organics, and other contaminants as part of project OO-101G. Two samples arrived broken and unusable, and one sediment sample showed elevated background components affecting Toxaphene reporting limits, though no major anomalies were found in the remaining analyses.

In a May 2, 2000 email exchange regarding Sea-Tac Airport runway issues, Martha Choe updates John Savich on her efforts to coordinate between key stakeholders, noting she has spoken with Joe and attempted to reach Tom but received no response. She has arranged a meeting tentatively scheduled for May 16 at 2pm, bringing together the Governor's office, the Port, AWB, and unions to help move the runway matter forward. John had suggested that a high-level commitment to major milestones between DOE's Tom F. and Gina Marie was needed to give existing deadlines real weight.

A April 25, 2000 email from Martha Choe of the Washington State Community, Trade and Economic Development office to a colleague at the Department of Ecology summarizes concerns raised by the Port of Seattle regarding delays in obtaining a 401 water quality permit for Sea-Tac Airport's proposed third runway. Key issues include the FAA's unfamiliarity with Endangered Species Act requirements after taking over the review from the Army Corps of Engineers, King County's slow progress on stormwater documentation, and formatting problems that caused further delays. The email warns that if the permit is not issued by July 21, 2000, the third runway's inclusion in the regional transportation plan—and its federal funding eligibility—could be jeopardized.