TagACC(1534)

Discharge Monitoring Report (DMR) for April 1998, permit number WA-002465-1, discharge number 001 (IWS), submitted by Port Of Seattle for Sea-Tac Airport (facility #681), P.O. Box 68727, Seattle WA 98168. Monitoring period covers April 1–30, 1998. Parameters monitored include flow (GPM), pH, oil and grease (mg/L), TSS (mg/L), BOD5 (mg/L), total glycols (mg/L), and TPH

A March 1998 fax exchange between the Port of Seattle and Herrera Environmental Consultants concerns the scope of work and cost estimates for Third Runway Water Quality Compliance Services. Carlos Herrera of Herrera Environmental sent documents to Port of Seattle contacts Barbara Hinkle and Kym Mattress, arguing that routine project water quality monitoring should be Herrera's responsibility, covering both compliance and BMP performance monitoring. Herrera noted he believed this approach would be most credible to the Washington Department of Ecology and neighboring airport communities, and requested review and discussion of the cost estimates to potentially reduce the budget.

Responsiveness summary for NPDES Permit No. WA-002465-1 issued by Washington State Department of Ecology to Port Of Seattle for Seattle-Tacoma International Airport (Sea-Tac Airport), prepared by Lisa Zinner, P.E., February 20, 1998. Covers discharge of treated industrial wastewater and stormwater; public meeting held November 3, 1997 and public hearing November 10, 1997 at Burien Public

NPDES Waste Discharge Permit No. WA-002465-1 issued by Washington State Department of Ecology (Northwest Regional Office) to Port Of Seattle for Seattle-Tacoma International Airport, King County, WA. Permit covers industrial wastewater discharge to Puget Sound (Outfall 001), stormwater discharges to Des Moines Creek (Outfalls 002-005, 009, 010, 014, 015), Miller Creek (Outfalls 006-008, 011), City

NPDES Waste Discharge Permit No. WA-002465-1 issued by Washington State Department of Ecology (Ecology) to Port Of Seattle for Seattle-Tacoma International Airport, effective March 1, 1998, expiring June 30, 2002. Authorizes discharge of industrial wastewater to Puget Sound (Outfall 001) and stormwater to Des Moines Creek (Outfalls 002-005, 009, 010, 014, 015), Miller Creek (Outfalls

In February 1998, the U.S. EPA Region 10 wrote to the Army Corps of Engineers recommending denial of a permit for the Port of Seattle's proposed third parallel runway at Seattle-Tacoma International Airport, citing concerns over the filling of more than 11 acres of wetlands and portions of Miller Creek and Des Moines Creek. The EPA objected that the applicant's mitigation plan relied almost entirely on off-site wetland replacement in the Green River Valley rather than within the affected watersheds, and questioned whether alternatives to wetland fills for the South Aviation Support Area and on-site borrow areas had been adequately explored. The agency indicated it was willing to work with the Corps and the Port to identify solutions that would satisfy both aviation safety needs and Clean Water Act Section 404(b)(1) requirements.

Whole Effluent Toxicity (WET) Program Evaluation prepared by Randall Marshall, WET Coordinator, Washington State Department of Ecology Water Quality Program, February 1998 (Publication #98-03). Evaluates implementation of Washington State’s WET regulation adopted October 1993, covering WET test review, effluent toxicity data, the state’s WET rule (WAC), EPA WET policy, SETAC Pellston Workshop (September 1995), EPA

Report prepared by Parametrix, Inc. for Port Of Seattle analyzing multiple-day rainfall probabilities at Seattle-Tacoma International Airport (Sea-Tac Airport). AR041556. Contains annual maximum precipitation probability plots for 1-7 day periods, monthly rainfall probability plots for each calendar month, and April-October seasonal rainfall probability plots. Includes appendices with slope and intercept estimates for rainfall-to-probability and probability-to-rainfall

This January 1998 geotechnical engineering report by AGI Technologies provides design recommendations for Phase 1 embankment construction related to the Third Runway Project at Seattle-Tacoma International Airport. The report covers site conditions including subsurface soil layers and groundwater, as well as design concepts addressing embankment stability, settlement, and drainage. It was prepared for HNTB Corporation as part of the engineering groundwork for the airport's runway expansion.

US Army Corps of Engineers Seattle District public notice of permit application 96-4-02325, filed by Port Of Seattle (contact: Barbara Hinkle, (206) 439-6606) under Section 404 of the Federal Clean Water Act. Proposes filling 7.38 acres of wetlands to construct an 8,500-foot parallel third runway at Seattle-Tacoma International Airport (Sea-Tac), plus 2.34 acres for Runway