TagSea-Tac Airport(2023)

Hart Crowser report (J-4978-22) prepared for HNTB, June 2000, analyzing preliminary stability and settlement for subgrade improvements supporting Mechanically Stabilized Earth (MSE) walls at the Sea-Tac Airport Third Runway Project. Covers three MSE wall locations — North Safety Area, West MSE Wall, South MSE Wall — with analysis of subgrade improvement alternatives including overexcavation and

This document summarizes soil contamination test results for fill material taken from the First Avenue Bridge site, collected between October 1999 and May 2000. Samples were tested for petroleum hydrocarbons (diesel and heavy oil ranges) as well as RCRA 8 metals and other contaminants, with results indicating varying levels of heavy oil detected across samples. The table notes which soil samples were ultimately placed at the Third Runway construction site at Sea-Tac Airport, with several samples excluded due to contamination concerns.

Handwritten notes from a SeaTac internal meeting on 5-23-00 (AR 018449, Exhibit 180), attended by Jeannie, Ray H., Tom L., Joan M., John Glynn, Kevin P., and Paula Chlos. Topics include resolving conflicts between wildlife hazard plan and mitigation plan, sideboard definitions needed; need for ETA statement on conflict with circular and whether it meets

Letter dated May 22, 2000 from Elizabeth Leavitt, Manager of Aviation Environmental Programs at Port Of Seattle, to Tom Luster at Washington Department of Ecology (Environmental Coordination Section), withdrawing the December 6, 1999 CZMA Consistency Statement and simultaneously submitting a new one to reset the six-month review period under 33 C.F.R. Sec. 325.2. The withdrawal

Email from Raymond Hellwig to Thomas Fitzsimmons dated May 19, 2000, regarding the SeaTac Third Runway permitting process and July 2000 decision-making timeframe. Discusses King County review of Port Of Seattle stormwater management plan requiring up to 10 more weeks, internal staff meetings to develop a definitive issues list, drafting 401 language for resolved issues,

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

Draft memorandum dated April 10, 2000 from Douglas Lindquist, Barry Chen P.E., and Mike Bailey P.E. of Hart Crowser, Inc. to Jim Thomson P.E. at HNTB regarding seismic basis of design for the Third Runway Project (J-4978-14) at Sea-Tac Airport for the Port of Seattle. Compares 475-year return period (0.36g peak acceleration, 10% probability of

Draft Subsurface Conditions Data Report prepared by Hart Crowser for Port Of Seattle and HNTB, project number J-4978-23, dated April 7, 2000. Covers geologic and subsurface soil conditions, hydrogeologic conditions, auger borings, Standard Penetration Test (SPT) procedures, test pit excavations, and monitoring well installation for the South MSE (Mechanically Stabilized Earth) Wall and Adjacent Embankment

A April 2000 memo from engineering firm Parametrix, Inc. evaluates roofing options to prevent zinc leaching from galvanized steel roofs on two Port of Seattle warehouses at Sea-Tac Airport. The study compared paint systems (ranging from $21,000–$240,000 for both buildings) against synthetic coverings such as spray-on elastomers and single-ply membranes ($60,000–$330,000), finding that painting is cheaper but requires more frequent maintenance while synthetic coverings last longer but cost more upfront. The memo recommends that any chosen material be evaluated to ensure it does not release metals or other pollutants into stormwater runoff.