TagStormwater(373)

This 1997 Annual Stormwater Monitoring Report, prepared by Scott Tobiason of Port of Seattle Environmental Services, documents water quality data collected from Seattle-Tacoma International Airport's stormwater discharges between July 1, 1996 and May 31, 1997. The report analyzes discharge samples from stormwater outfalls across the airport's drainage basins, comparing results to regional and national benchmarks, and notes that improvements from newly installed Best Management Practices (BMPs) would be evaluated in the following year's report. It was submitted to the Washington Department of Ecology in fulfillment of Special Condition S.9 of the airport's NPDES permit.

This June 1997 report, prepared by the Port of Seattle for Washington State's Department of Ecology, presents storm water receiving environment monitoring results conducted under NPDES Permit No. WA-002465-1. It covers water quality topics including instream toxicity bioassays, sediment quality, identification of pollution sources, metals speciation, vegetation management, and streambank erosion in Miller Creek and Des Moines Creek watersheds near Sea-Tac Airport. The findings assess the environmental impact of airport storm water runoff on local waterways and identify contributing pollution sources within each creek basin.

Annual Stormwater Monitoring Report for Seattle-Tacoma International Airport (STIA) covering the period July 1, 1995 through June 30, 1996, AR 027767–027769. Prepared by Scott Tobiason, Environmental Management Specialist, Port Of Seattle Environmental Services. Reviewed by Tom Hubbard (Port of Seattle) and Gary Minton (Resource Planning Associates). Document concerns NPDES stormwater monitoring at Sea-Tac Airport.

This 1996 document summarizes public responses to a proposed modification of the water discharge permit (NPDES Permit No. WA-002465-1) for Sea-Tac International Airport, operated by the Port of Seattle. It addresses concerns raised at a June 1996 public hearing in Burien, WA, including questions about self-monitoring of water samples, erosion and water flow in Miller Creek, and the Department of Ecology's enforcement and fining process. The document outlines how Ecology responded to community concerns and describes permit changes, such as a new condition requiring the Port to assess the airport's impact on local creek hydrology.

A 1995 Washington Department of Ecology staff discussion paper analyzes regulatory challenges in applying the NPDES permit program to municipal and industrial stormwater discharges, focusing on how to ensure such discharges comply with Clean Water Act water quality standards. The paper explores questions around defining 'Waters of the State,' determining compliance monitoring points, and identifying which permitted dischargers require water-quality-based effluent limitations. Note that this paper does not represent official Ecology policy and was intended to stimulate internal discussion and policy decisions.

Academic journal article published in Environmental Toxicology and Chemistry (Vol. 14, No. 6, 1995) by Fisher, Knott, Turley, Turley, Yonkos, and Ziegler from the University of Maryland and Maryland Department of the Environment. Study characterizes acute whole effluent toxicity (WET) of storm water from Baltimore-Washington International Airport (BWI) on fathead minnow (Pimephales promelas) and daphnid

This 1994 document is a Response to Comments on a proposed National Pollutant Discharge Elimination System (NPDES) wastewater discharge permit issued to the Port of Seattle for Sea-Tac International Airport. It summarizes public feedback gathered at meetings in Des Moines and Normandy Park, Washington, addressing topics such as storm water management, effluent limitations, spill plans, and pollution prevention at the airport. The document reflects the Department of Ecology's review of industrial wastewater, cooling water, and storm water discharges from airport operations including aircraft maintenance, fueling, and de-icing activities.

Parametrix Record of Communication (AR 026481–026483), project no. 55-2912-01, dated 3/30/94, by Linda Logan, documenting outgoing call to Kevin Fitzpatrick at Ecology (Ecolog[y]) as follow-up to 3/25/99 meeting. Topics include WER (Waste Effluent Ratio) work plan outline review by Gary Bailey and Randy Marshall, mixing zone study approach review by Norm Glen, AKART requirements at

A 1993 Port of Seattle letter to Des Moines resident Barbara Stuhring explains that airplane deicing at Sea-Tac uses only FAA-approved ethylene or propylene glycol, and that wastewater from deicing drains to the airport's treatment system before being discharged to Puget Sound — not to Miller or Des Moines Creeks. A 1996 Final Environmental Impact Statement (EIS) later addressed public concerns about deicing fluid effects on local waterways, concluding that glycol quantities in stormwater runoff were too small and too diluted to cause lethal impacts on aquatic life in those creeks. Stuhring subsequently wrote to the Port challenging what she saw as a contradictory response in the Final EIS compared to the original 1993 letter.