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Re: Background Dioxin Levels?
>According to Bill Farland of EPA speaking today at Dioxin '97, soil
>background levels across the US are ca. 20+/-6 ppt and that's what it will
>say when the reassessment issues.
To make this statement definitive, Bill Farland should describe sampling
methodology, including for example, 'depth'. If we take the land surface
area of the US and Canada, and multiply by the depth, then using the
20 ppt we can arrive at our total background inventory of dioxin stored in
soil. Should be an interesting number, the concept and origins of this
inventory are interesting too. We can divide by population and attribute
per capita 'ownership' as well.
Philip Fleischer firstname.lastname@example.org