RE: Acceptable fill criteria language for draft 401 certification

Notes

An internal email from Peter Kmet to Kevin Fitzpatrick recommending language for a 401 Certification regarding acceptable fill criteria for the Seattle-Tacoma International Airport Third Runway project. The email outlines four elements for ensuring fill material would not cause adverse impacts on plants and animals, including chemical testing requirements, bioassay testing, a clean soil buffer zone, and statistical compliance methods. The document also includes earlier emails discussing whether MTCA should be used to establish clean-fill criteria.

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