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Thank you for helping me make this point - even low levels of lead are unsafe. A brief reread of my post shows that I failed to emphasize my indignation with the fact that pediatricians do not care about lead levels until they reach 10 - but parents should be concerned by any levels. It is important for parents to find out the results of these tests so that they can determine if there child has any lead exposure and what they need to do about it.
(And we did by a HEPA filter vaccuum and my daughter and I went out of town while our porch was torn down and rebuilt.)