TagWater Quality(478)

A July 2001 email from King County engineer Kelly Whiting summarizes ecological recommendations regarding proposed stream flow mitigation measures. A lead stream ecologist advised that mitigation plans be compared against existing stream hydrology to avoid abrupt changes that could disrupt biological processes, such as sudden summer flow increases confusing fish behavior. The ecologist also emphasized that water quality factors like temperature and dissolved oxygen are as important as flow rates, and suggested introducing reserved water gradually through ponds or wetlands rather than directly into streams.

Email from Chung K. Yee to Kevin Fitzpatrick (cc: Craig E. Thompson, Ann Kenny), dated June 26, 2001, transmitting draft clean fill criteria language for the 401 Certification related to the proposed Third Runway embankment at Sea-Tac Airport. Fill criteria based on Method A table, 3-phase model protection of ground water and surface water, PQL,

Email dated June 26, 2001 from Chung K. Yee to Craig E. Thompson and Kevin Fitzpatrick (Ecology) transmitting draft fill criteria requirements for the 401 Water Quality Certification for the SeaTac Third Runway Embankment project. Attachments include: draft clean fill criteria, spreadsheets deriving surface water quality criteria and ground water cleanup levels using three-phase model

Email from Chung K. Yee to Kevin Fitzpatrick, cc Craig E. Thompson and Ann Kenny, dated June 26, 2001, transmitting draft fill criteria language for a 401 Certification related to the Port Of Seattle Third Runway embankment project. Fill criteria are based on Method A table, 3-phase model protection of ground water and surface water,

These are meeting notes from a June 25, 2001 technical meeting regarding the 401 Permit Decision-Making process for the Sea-Tac International Airport Third Runway project, focused on analyzing low stream flow impacts. Participants from the Department of Ecology, King County, Port of Seattle, and various consulting firms discussed methodologies for evaluating water flow modeling results, vault filling estimates, and potential mitigation requirements for affected streams. Modeling results were not yet available at the time of the meeting, and a follow-up meeting was scheduled for July 9, 2001 to review completed modeling output and determine any required mitigation measures.

Final meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the 401 Permit Decision-Making process for the Sea-Tac International Airport Third Runway project, covering Low Flow Analysis discussions held June 25, 2001. Attendees included representatives from Washington State Department of Ecology (Ann Kenny, John Drabeck), King County (Kelly Whiting), Port of Seattle

Draft technical memorandum prepared by Associated Earth Sciences, Inc. (AESI, Project No. BV99122C) for Port Of Seattle, dated June 19, 2001, analyzing preferential ground water flow paths relative to the proposed Third Runway at Seattle-Tacoma International Airport (STIA). Evaluates potential contaminant migration from the Aviation Operations and Maintenance Area (AOMA) to the third runway construction

Draft technical memorandum prepared by Associated Earth Sciences, Inc. (AESI, Project No. BV99122C) for Port Of Seattle, dated June 19, 2001, analyzing preferential ground water flow paths relative to the proposed Third Runway at Seattle-Tacoma International Airport (STIA). Responds to Washington Department of Ecology (Ecology) request regarding whether contaminated ground water below the Aviation Operations

Final meeting notes from June 14, 2001 (1:00–4:00 PM) prepared by Kate Snider, Floyd & Snider Inc., for the 401 Permit Decision-Making process for the Sea-Tac Airport Third Runway. Attendees included Ann Kenny and John Drabeck (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port Of Seattle), Paul Fendt (Parametrix), Alan Black (HNTB), and

Draft meeting notes from June 12, 2001 status meeting on Low Stream Flow related tasks for Sea-Tac International Airport Third Runway 401 Permit Decision-Making process. Attendees included Ann Kenny and John Drabeck (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port of Seattle), Paul Fendt (Parametrix), and Charles Ellingson (Pacific Groundwater Group). Topics covered: