In conclusion, we maintain there is sufficient information to
warrant the decision to leave the Pu-contaminated areas discussed
in this paper as exclusion areas.
There are a few uncertainties
in maintaining exclusion areas among which appears to be the
possibility of movement of Pu into the playas, even though the
dilution factors may negate the hazard in this area.
There may
be some positive advantages to these exclusion areas, and the
possibility of decreasing Pu availability to food chains or to
other human exposures with time making this alternative well
worth considering.
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