TagNPDES(130)

The Industrial Wastewater System (IWS) at Seattle-Tacoma International Airport was built in 1963 to collect and treat runoff from airport aprons, taxiways, hangars, and maintenance areas that may be contaminated by fuel spills, de-icing chemicals, and aircraft wash water. The system channels wastewater through two main drainage areas to an on-site treatment plant, with treated water ultimately discharged into Puget Sound under an NPDES permit. Ongoing upgrades aim to expand the system's capacity to handle a 25-year design storm event.

Final draft meeting notes from November 29, 2000 (9:30am–2:00pm) prepared by Kate Snider of Floyd & Snider Inc. for Sea-Tac Airport Third Runway 401 permit negotiations between Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith) and Washington State Department of Ecology (Kevin Fitzpatrick, Ann Kenny, Dave Garland), with King County (David Masters, Kelly Whiting)

Final draft meeting notes prepared by Kate Snider of Floyd & Snider Inc. for Sea-Tac Airport Third Runway 401 Permit Negotiations meeting held November 13, 2000, 1:00–3:30 PM. Attendees include representatives from Washington State Department of Ecology (Ray Hellwig, Kevin Fitzpatrick, Ann Kenny, Dave Garland), Port Of Seattle (Elizabeth Leavitt, Michael Cheyne, Keith Smith), King

Resume of Paul S. Fendt, P.E. (Parametrix), dated October 26, 2000, detailing over 16 years of stormwater engineering and planning experience. Projects include Valley Creek Estuary Restoration (Port of Port Angeles, WA), Stormwater Pollution Prevention Plans (SWPPP) for Potlatch Corporation (Lewiston, ID) and Port of Vancouver (Columbia River, WA), stormwater treatment system design for Port

Exhibit 89 (AR 017784-017785). Email chain forwarded by Raymond Hellwig (Ecology) to Ann Kenny on October 26, 2000, containing internal comments by Tom Luster (Ecology) on draft 10/20/2000 meeting notes for the Sea-Tac Airport third runway 401/404 review. Luster raises concerns about: NPDES major modification and stormwater plan for SR-509 interchange; South Access/Tyee Pond spill

Internal email chain dated October 23, 2000 from Tom Luster (Ecology) to Raymond Hellwig, Kevin Fitzpatrick, Erik Stockdale, and Joan Marchioro (ATG), forwarded November 20, 2000 to Thomas Fitzsimmons, concerning 401/404 review of SeaTac airport Third Runway expansion. Luster raises unresolved issues including: NPDES major modification and stormwater plan approval for SR-509 interchange as prerequisite

STIA Construction Site Stormwater Monitoring reports dated 10/16/00 and 10/20/00, samplers JL/RS and JB/RS. Documents turbidity and pH measurements at multiple Sea-Tac Airport construction sites including Logistics Site Development (Tyee Pond, Des Moines Creek outfall), MWS Lagoon 3 Construction, Airfield Improvement (SDS3-594, SDS-6, SDS-7), Dobbs Flight Kitchen Remodel (SDE4-611, SDE4-607, SDE4-615, SDE4-601, SDE4-602), Booster Pump

A water resources consultant hired by the Airport Communities Coalition reviewed Sea-Tac Airport's August 2000 Stormwater Master Plan and found it seriously deficient in protecting local water quality. The review concludes that existing pollution controls at the airport are not working, that stormwater discharges regularly violate Washington State Water Quality Standards, and that the Plan's proposed measures fail to provide reasonable assurance that those standards will be met in the future. Key concerns include the diversion of polluted runoff away from local creeks, inadequate handling of metal roof runoff, and the lack of meaningful mass-balance accounting for long-lived pollutants.

This document contains a September 2000 email exchange regarding the proposed expansion of Lagoon #3 in the Sea-Tac Airport Industrial Wastewater System (IWS), in which consultant Bill Rozeboom follows up on unresolved comments submitted to the Washington State Department of Ecology. The attached July 31, 2000 comments raise concerns about discrepancies in the lagoon's design capacity, the risk of frequent overflow into Des Moines Creek, and potential wildlife hazards near aircraft movement areas that may violate FAA guidelines. Additional issues flagged include incomplete construction plans, unaddressed lagoon deficiencies, and the apparent overlap of the lagoon expansion project with 3rd runway construction activities affecting nearby wetlands.

Email dated August 10, 2000 from Kate Rhoads to Kelly Whiting transmitting a Word document (POS-Cu.doc) containing technical comments on copper (Cu) levels in stormwater runoff from Seattle-Tacoma International Airport (STIA) runways. AR017903-017904. Comments address total recoverable (TR) copper median concentration of 37 ug/l versus the dissolved fraction surface water acute toxicity standard of 4