TagNPDES(128)

This Stormwater Pollution Prevention Plan (SWPPP), prepared by the Port of Seattle for Seattle-Tacoma International Airport in November 1998 (with revisions through December 2001), outlines strategies and best management practices (BMPs) to prevent pollutants from contaminating stormwater runoff at Sea-Tac Airport. The plan covers a range of potential pollution sources including aircraft servicing, deicing operations, spills, construction sites, and vehicle maintenance, and describes the airport's drainage systems and inspection requirements under its NPDES permit. It serves as a regulatory compliance document ensuring that airport operations minimize their impact on local water quality.

Stormwater Pollution Prevention Plan (SWPPP) for Seattle-Tacoma International Airport (Sea-Tac Airport), prepared by Port Of Seattle, originally November 1998 with Revision 1 (April 1999) and Revision 2 (December 2001). AR 052594. Covers drainage system description, potential pollution sources and Best Management Practices (BMPs) for aircraft servicing, ground anti-icing/deicing of roads and paved surfaces, snow storage,

A 1998 internal email exchange between Ken Ludwa and Kerry Ritland discusses edits to Section 4.3 of a stormwater management report related to Sea-Tac Airport. The section covers water quality facilities, explaining that new stormwater detention facilities would follow state Ecology guidelines using biofiltration and permanent water quality storage, while also complying with the Port's NPDES permit and Stormwater Pollution Prevention Plan (SWPPP). Ken Ludwa agreed to edit the section to reference Appendix F – Water Quality BMP Analysis once that appendix was further developed.

Memorandum from Ken Ludwa (Parametrix, Inc.) to Paul Fendt dated July 1, 1998, project number 55-2912-01, describing results of a Reasonable Potential Analysis (RPA) for the STIA Third Runway area stormwater runoff. Analysis conducted at a working meeting with Lisa Zinner (Ecology), Lori Terry (Preston, Gates, and Ellis), Tom Hubbard (POS), John Rogers (CH2M Hill),

A 1998 internal memo from Parametrix, Inc. summarizes the results of a Reasonable Potential Analysis (RPA) conducted for the Seattle-Tacoma International Airport (STIA) Third Runway project, assessing whether stormwater runoff from the new runway could exceed water quality criteria in Miller Creek and Des Moines Creek. The analysis found that most pollutant concentrations after treatment with best management practices (BMPs) such as bioswales, sand filters, and wet ponds would meet criteria, with the exception of copper, which remained above acceptable levels. The memo also notes that existing pollutant concentrations in the receiving waterways during storms already exceeded criteria, even before accounting for Third Runway runoff.

A July 1, 1998 memorandum from Parametrix, Inc. summarizes the results of a Reasonable Potential Analysis (RPA) conducted for the Seattle-Tacoma International Airport (STIA) Third Runway project, assessing stormwater runoff quality against water quality criteria for Miller Creek and Des Moines Creek. The analysis found that most pollutant concentrations after treatment with best management practices (BMPs) such as bioswales, sand filters, and wet ponds would meet criteria, with the exception of copper, which remained above acceptable levels. The memo also notes that during storms, pollutant concentrations already present in the receiving waters exceeded criteria and were higher than those predicted from Third Runway stormwater runoff.

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

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