EXH1254050641

CorDorate Ch_ce • 9t t FifthAvenue.Sure 100 • KirkJand WA 98033 • I:_none425 82%770] • Fax425 827-5424 West Sound Office • 179 Maclrone Lane Norm • BambnclgeIslancI.WA 98110 • Pr_one206 780-9370 • Fax 206 780-9438 1254 AR 050641 DRAFT TECHNICALMEMORANDUM JUNE 19, 2001 ANALYSIS OF PREFERENTIAL GROUND WATER FLOW PATHS RELATIVE TO PROPOSED THIRD RUNWAY SEATTLE-TACOMA INTERNATIONAL AIRPORT 1.0 INTRODUCTION The Port of Seattle (Port) presents this technical memorandum in response to a request from the Washington Department of Ecology (Ecology). Ecology has asked the Port to respond to a concern expressed by members of the public and certain State legislators opposed to construction of the proposed Third Runway at Seattle-Tacoma International Airport (STIA). The issue presented is whether known contaminated ground water conditions located below the principal aviation operations and maintenance area (AOMA) of STIA will migrate to the third runway construction area due to the presence of subsurface utilities and/or perched zones acting as pathways of contaminant migration, and/or the natural westward flow of ground water in the upper-most regional aquifer (Qva). The purpose of this technical memorandum is to report the findings of the Port's evaluation of potential contaminant migration from the AOMA to the thirdrunway area. The scope of this technical memorandum is to review and evaluate available data to enable a technical conclusion in response to the issues raised about proposed construction of the third runway. The issue is the potential for ground water flow and contaminant migration from the AOMA to the construction area.…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]