EXH0033017496

• nt: Monday, September 11,2000 3:44 PM _e._ Jc.c, 1: o: Yee, Chung K. Cc: Fitzpatrick, Kevin Subject: New Method A Soil Cleanup Levels Here are a series of tables showing the calculations for the new Method A soil cleanup levels and providing a comparisonto the current Method A values. TAIBL740g.XL.S As I noted in our phone conversation, one point I didn't include in my earlier comments was ground water monitoring. I stillthink it would make sense to require that giventhe magnitude of the fill. You asked whether I thoughtthe Method A values could be used as a basis for defining clean fill. I understand there are some concerns about whether this can be done legally. Putting aside that issue for the moment, as I look at the Method A cleanup values in light of this use, several thoughts •come to mind: We believe the currentstandards are not protective for several chemicals. That is why we are proposing new values. You should require them to use the new standards (assuming we end up dopting them). One exception is arsenic. I think you need to lookcarefully at that value as the calculations indicate the current MethodA arsenic soil cleanup level may not always be protective. We plan to revisit that value in a future rule-making. In the interim, you may want to use a background value instead of Method A. The statewidestudy we had the USGS do found background in uncontaminated areas at PPM. As I re-look at this attachment inthe…

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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 [...]