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Re: Dirty bombs



On Thu, 27 Feb 2003, John Andrews wrote:

> >

> I cleaned up an old spill of Cs-137 once.  The material had been cleaned

> up years earlier, but residual material remained on some of the

> concrete.



	--In the original clean-up, years earlier, what fraction of the

contamination had been removed without chipping concrete?

	--In your clean-up, were you trying to get levels down to

background or to levels like that in Congressional Office Buildings ,

Grand Central Station, ets.



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