This document is a draft National Pollutant Discharge Elimination System (NPDES) waste discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for Sea-Tac International Airport. It governs the discharge of treated industrial wastewater into Puget Sound and stormwater runoff into nearby waterways including Des Moines Creek, Miller Creek, and Walker Creek. The permit sets effluent limits, monitoring requirements, and reporting obligations to protect water quality in the receiving waters.Open full document
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A draft NPDES waste discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for Sea-Tac International Airport. The permit authorizes discharges to Puget Sound (process wastewater) and several stormwater receiving waters including Des Moines Creek, Miller Creek, Walker Creek, and a City of SeaTac storm sewer tributary. The permit includes special conditions covering industrial wastewater treatment, stormwater runoff, discharge limitations, monitoring requirements, and toxicity standards.