EXH0287019665

The Corp of Engineers (USCOE) has supplied the Pqrt of Seattle with soil quality information for the Hamm Creek Restoration Project Site located along West Marginal Way, south of Boeing Field. This information includes partial copies of a 1990 site assessment by the Boeing Company, a 1997 USCOE Sampling and Analysis Plan, and a 1997 USCOE Sediment Characterization Report including Appendix C and E. These reports will be placed in the Port files. The review of the site data does not indicate any exceedences of MTCA cleanup levels. The material, therefore, should be suitable for use as fill material for the third runway. Several souJ;ceissues have been evaluated, and should be considered before the Port makes the final decision to accept_the material. Our evaluation of these issues are discussed below, and include responses from the USCOE project manager Pat Cagney, and information received.informally from Pete Rude, a sediment specialistfor Landau Associates, Inc.. Data Summary The followingis a brief summary of some of the detected constituents: Constituent Maximum Level Maximum Level PSDDA SL ::)raftMT.CA Method A (USCOE) (Boein_l) Residential) Total DDT 14 ppb ND 6.9 ppb 1000 ppb Total PCB 160 ppb ND 130 ppb 400 ppb PAHs (Cam) ND 459 ppb 1,800 ppb 700 ppb (HPAH) Mercury 0.074 ppm 0.51 ppm 0.21 ppm 1.0 ppm ND = Not detected Discussion • The USCOE study detected PCBs and DDTs above the PSDDA screening levels but below MTCA cleanup levels. Since the samples were composited over large areas and depths, there is…

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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 [...]