EXH0538023646

Northwest Regional Of/;ce, 3)' 90 . 16Orb Ave S.E. ° Bellevue, Washington 98008-5d52 • (425) 649.7000 August 23, 1999 TO: Steven M. Alexander Section Head, Toxics Cleanup Program, NW'RO FROM: Roger Nye SUBJECT: Requested Write Ups Regarding Sea-Tac Airport You asked me to write up two items: (1) the Toxics Cleanup Program's historical involvement at Sea-Tac Airport, and (2) the current workload regarding Sea-Tac Airport. have also included anticipated future workload. (1) Historical Involvement: There are several individual MTCA sites (currently 15) within Sea-Tat Airport. The sites _ are mostly widely scattered and physically not connected. Jet fuel and gasoline are the most abundant contaminants and deep groundwater (70- 90 _. bgs.) is impacted at about actions have been / ongoing at the sitesI/3 oft.he sites. Independent cleanup are by various responsible parties under different timelines. Responsible parties include tenant airline and rental car companies, Olympic Pipeline Co., and the Port of Seattle (POS). There are public water well fields both north and south of the airport, and three suburban streams head near the edges of the airport. Given known information at the individual MTCA sites, the current risk to the wells and streams appears to be minimal. The MTCA sites have always been tracked and dealt with iridividually. Sea-Tac Airport has never been treated as a single "facility" with the MTCA sites as "operable units". Sea-Tac Airport has never been ranked as a single facility, nor have any of the individual MTCA sites been ranked. A new jet fuel…

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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 [...]