Notes
Email chain dated June 27, 2001 among Chung K. Yee, Peter Kmet, Kevin Fitzpatrick, and Craig Thompson (Washington State Department of Ecology) regarding acceptable fill criteria language for the Draft 401 Certification for the Seattle-Tacoma International Airport Third Runway project. Peter Kmet recommends using Table 749-3 chemical screening values for terrestrial ecological protection, requiring the uppermost 6 feet of fill to consist of clean naturally occurring soil with no detectable manmade organic compounds and no metals above natural background concentrations per Ecology publication #94-115, and applying WAC 173-340-740 statistical test methods. Kmet recommends against using MTCA (Model Toxics Control Act) as the basis for clean fill criteria. Topics include bioassay testing under WAC 173-340-7493(3)(b)(i), borrow pit ESA reports, virgin borrow sites, terrestrial ecological evaluation, ground water monitoring, and fill material contaminant testing. Document is marked as a deliberative document currently exempt from public disclosure. AR 023937–023939.