TagStormwater(385)

This document is a public responsiveness summary from Washington State's Department of Ecology regarding an NPDES wastewater discharge permit issued to the Port of Seattle for Seattle-Tacoma International Airport. It compiles and responds to comments received during a March 2003 public meeting and hearing, covering concerns about the airport's treated industrial wastewater, stormwater runoff, and construction runoff discharges. The summary addresses feedback from a range of stakeholders, including the Port of Seattle, local legislators, advocacy groups, and individual residents.

Paper by Scott A. Tobiason (Port Of Seattle) and Linda R. J. Logan (Parametrix Incorporated) documenting stormwater whole effluent toxicity (WET) testing at Seattle-Tacoma International Airport (STIA) during 1998-99 across four NPDES permit outfalls. WET tests used Daphnia pulex and Pimephales promelas (fathead minnow); outfall SDN1 draining 6 hectares of rooftops and roadways failed Washington

This document, labeled Exhibit 431 and bearing reference number AR 022780.01, is a photograph from the administrative record, appearing to show ground-level environmental conditions near a pipe or post, with visible soil, leaf litter, pine needles, and wet or saturated ground surface. The image likely documents site conditions relevant to environmental or noise mitigation proceedings associated with Seattle-Tacoma International Airport. No additional text or descriptive caption accompanies the photograph.

This document, labeled Exhibit #430 and archived as AR 022780, is a photograph showing what appears to be a ground-level view of a wet or muddy outdoor area with debris, sticks, and small plants visible. A white pipe or tube is partially visible in the lower left corner of the image. The photo appears to have been submitted as evidence or documentation in a proceeding related to Sea-Tac Airport noise or environmental policy matters.

Declaration of Linda R.J. Logan, Ph.D. (Division Manager, Parametrix, Inc.) filed before the Washington Pollution Control Hearings Board (PCHB No. 01-133) in Airport Communities Coalition (ACC) v. Department of Ecology and Port Of Seattle. Logan holds a Ph.D. in Environmental Geochemistry and Health and over 10 years of consulting experience in risk assessment, stormwater quality,

This document outlines a Water Quality Assessment (WQA) conducted in support of the Port of Seattle's Master Plan Update for Seattle-Tacoma International Airport (STIA), focused on evaluating the airport's ability to meet water quality requirements under its NPDES permit following construction of a proposed third runway. The assessment uses three approaches: a Water Effect Ratio (WER) study to adjust water quality standards for site-specific conditions, a mixing zone analysis to determine where standards must be met in receiving streams, and an examination of variability in stormwater quality. The goal is to reach agreement with the Washington Department of Ecology on whether aquatic life in nearby receiving streams will be adequately protected.

This research study examines how heavy metals in highway stormwater runoff behave as water flows off pavement, finding that most heavy metals remain dissolved rather than attaching to solid particles due to low alkalinity and short travel times on the pavement surface. The study, conducted on Interstate 75 in Cincinnati over two years, explores how best management practices like detention basins or infiltration trenches could be used to capture these metals before they reach receiving waters.

Reference list compiled by Peter Willing, Ph.D., of documents relied upon in testimony regarding the 401 Water Quality Certification for the Third Runway at Sea-Tac Airport. Sources cited include studies on highway runoff chemistry, heavy metals partitioning, urban stormwater BMPs, treatment wetlands, NPDES permits, and Port of Seattle annual stormwater monitoring reports (1998–2001). Key references

This document is a reference bibliography (Exhibit B) listing scientific and regulatory sources related to environmental monitoring at Seattle-Tacoma International Airport. It includes studies on stormwater quality, aircraft de-icing and anti-icing fluid toxicity, aquatic habitat assessment, and sediment guidelines, drawn from sources such as the Port of Seattle, Parametrix Inc., and various environmental agencies. The references support environmental compliance reporting under the airport's NPDES stormwater permit.

Technical Note #15 from Watershed Protection Techniques, I(1):30-31, covering sources of urban stormwater pollutants as defined in Wisconsin. Based on Bannerman, R., D. Owens, R. Dodds, and N. Hornewer (1993) study published in Water Science & Technology (28):3-5, pp. 241-259. Over 300 runoff samples collected from 46 micro-sites in two watersheds. Documents pollutant concentrations of