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EXH AR023743: Internal Deliberative Notes — Third Runway EIS Fill, Stormwater, Tyee Pond, Soil Fill Criteria, Water Quality BMPs

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Sea-Tac Airport
Third Runway
PCHB
Box 10

These internal deliberative notes from 5/30/00 discuss fill and stormwater management issues related to a construction or development project, covering topics such as soil fill acceptance criteria, Best Management Practices (BMPs) for water quality, spill containment features at Tyee Pond, and monitoring requirements for dissolved metals. The notes reference coordination among multiple regulatory frameworks including Section 401, CZM, and MTCA, and address questions about impervious liner hydrologic impacts and remediation procedures. Key action items include developing an approved stormwater plan, establishing soil sampling protocols for borrow sites, and determining upfront versus incremental BMP implementation strategies.

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Notes

AR023743–AR023745. Internal deliberative notes dated 5/30/00 covering third runway EIS review issues including: 545A fill (80 acres), no flow augmentation, stop work conditions; 509 Temporary Interchange stormwater plan and 401 SMP element; provisional BMPs (BmG); Tyee Pond dual-feature spill containment and 401 language for Wetland 2 Forested Scrub/Shrub; source control BMPs, easement language, spill cleanup, restoration; south access road DOT and Sandi Manning restrictive covenants; Jason #3 (10 acres impervious liner, hydrologic impacts to wetland 28, indirect loading); water quality BMPs monitoring, enhanced WQ treatment BMPs, 401 conditions; copper and dissolved metals triggers; soil fill acceptance criteria form (no toxic materials, prohibitions against remediated material, sampling of fill and borrow sites); MTCA, AO, clean disclosure; CZM 401 plus CZM; additional NEPA/SEPA. References Pete Komet TLP/HO, Jem Kelly, Dyanne Sheldon, Jein Austins.

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