TagNPDES(130)

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

Email chain dated July 30, 2000 from Kelly R. Whiting, PE, King County Department of Natural Resources, Water and Land Resource Division, Drainage Services Section, to David Masters and Tom Luster (WDOE), forwarding water quality specialist Kate Rhoads’ notes on copper (Cu) levels in Seattle-Tacoma International Airport (STIA) runway stormwater runoff. Whiting discusses KCSWDM (King

Email from Kate Rhoads to Kelly Whiting dated July 28, 2000, with attached notes (POS-Cu.doc) on copper levels in Sea-Tac Airport (STIA/POS) runway stormwater runoff and the need for further treatment. Notes discuss total recoverable (TR) copper concentrations (median 37 ug/l) from SEATAC runways versus the acute toxicity standard of 15 ug/l at hardness 100,

Memo dated May 12, 2000 from Ray Hellwig (Northwest Regional Office, Department of Ecology) to Gary Zeiler requesting $200.00 recognition checks for seven Ecology staff and two AAGs (Joan Marchioro and Tom Young, Ecology Division) involved in the Sea-Tac Third Runway Water Quality Certification and NPDES Permit decisions. Staff recognized include Ann Kenny, Erik Stockdale

Final report prepared by Scott Tobiason, Aviation Environmental Programs, Port Of Seattle, documenting Stormwater Whole Effluent Toxicity (WET) testing at Seattle-Tacoma International Airport (STIA), May 2000. AR 044473. Covers WET testing background, sampling methods, STIA storm drainage subbasins, source-tracing of SDN1 outfall, chelation testing, synthetic runoff WET test results, field investigations, and NPDES stormwater discharge

Handwritten notes from a BEATAC meeting at the Port on April 20, 2000, AR018447, involving City of Des Moines personnel including Tom Walsh, Tacie Borden, John Marchiloro, Jim Kelly, and others. Topics include: stormwater review at FCC starting 5-5-00; SR-509 temporary interchange issues (ESA/BA review, Jonathan Freedman indirect impacts, erosion/sediment control, no federal nexus); LWS#3

Internal email from Tom Luster to Kevin Fitzpatrick dated January 12, 2000, discussing the legal distinction between Clean Water Act Section 401(d) and Section 402(a) as applied to Sea-Tac Airport water quality (WQ) and State Environmental Policy Act (SEA/SEPA) policies. Email quotes statutory language verbatim: 401(d) uses mandatory ‘shall’ language for effluent limitations and monitoring

A January 2000 internal email from EPA's Raymond Hellwig to Tom Luster addresses concerns about premature deaths of Coho salmon in Des Moines Creek near Sea-Tac Airport, in the context of the proposed third runway project. The email clarifies that stormwater discharge regulation will be handled through NPDES permits rather than Section 401 Water Quality Certifications, as the NPDES permit provides the only mechanism for ongoing regulatory oversight under the Clean Water Act. Hellwig directs Luster to defer to the Water Quality Program on stormwater issues and to stop raising the 401 Certification as an alternative avenue for addressing water quality standards.

A September 20, 1999 internal memorandum from Parametrix, Inc. consultants to Scott Tobiason provides technical review comments on the first draft of the 1999 Annual Stormwater Report for Seattle-Tacoma International Airport (STIA). The memo raises concerns about consistency in water quality comparators, statistical methods for 'trimmed' data sets, and the attribution of reduced sediment levels to construction wheel wash versus other factors. It also flags regulatory issues regarding mixing zones, water quality standards language, and potential NPDES permit compliance implications of identifying pollution sources in the annual report.

Annual stormwater monitoring report (AR018047) prepared by Port Of Seattle for Seattle-Tacoma International Airport (STIA) covering the period July 1, 1998 through June 30, 1999. Documents NPDES stormwater sampling results across STIA storm drainage subbasins including grab and composite samples for total petroleum hydrocarbons (TPH), fecal coliforms, suspended solids (TSS), turbidity, biochemical oxygen demand (BOD5),