Deirdre Murphy/RTP/USEPA/US

06/19/2008 08:13 AM

	

To

Tricia Crabtree/RTP/USEPA/US@EPA

cc

Subject

NACAA Lead Testimony - clarification









Hi Tricia,

This morning (6/19/08), I spoke to Mary Stewart Douglas of NACAA to ask
a clarifying question regarding the testimony that NACAA recently
submitted on the Pb NAAQS, which they had apparently intended to read at
the Baltimore and St. Louis hearings.  

I asked her to clarify the meaning for the first two full sentences at
the top of page 2 which refer to blood Pb concentrations below 7.5 (1)
and use of 9 ug/DL as a "baseline" (2).  With regard to the second, she
said that that was a result of some confusion with the assistance they
had in drafting the letter;  she did not think that they would include
that sentence in their full written comments on the proposal (to be
submitted by 7/21).  With regard to the first sentence, she indicated
that it was referring to the quantitative C-R relationship (from the
analysis of children with peak BLL<7.5) recommended by CASAC.

Deirdre

