TagNPDES(128)

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

Washington State Department of Ecology (Ecology) letter dated June 30, 1994, issuing NPDES Permit No. WA-002465-1 to Port Of Seattle – Sea-Tac International Airport, expiring June 30, 1999. Signed by John H. Glynn, Water Quality Supervisor, Northwest Regional Office. Permit authorizes discharge of industrial wastewater, non-contact cooling water, and storm water to Puget Sound, Des

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

This Washington State Department of Ecology report outlines stormwater erosion and sediment control requirements for large construction projects involving one or more acres of disturbed land in the Puget Sound Basin. It describes best management practices (BMPs) such as covering exposed soil, trapping sediment onsite, and protecting adjacent properties from runoff and sediment. Developers are required to create an erosion and sediment control plan and are financially responsible for its implementation.

A May 1989 environmental report from Hart Crowser, Inc. details the installation of three groundwater monitoring wells (WY-1, WY-2, WY-3) near underground fuel storage tanks at the Weyerhaeuser Aviation facility at Sea-Tac International Airport. Soil samples collected during drilling showed no detectable petroleum contamination, and no groundwater was encountered at the site. The report was prepared to help Weyerhaeuser comply with the Port of Seattle's NPDES permit requirements and to assess subsurface soil conditions around the tanks.