Document ID: EPA-HQ-OAR-2007-0225-0131
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2007-08-20T04:00Z

Marjorie Jones/RTP/USEPA/US

07/12/2007 12:59 PM

	

To

"Johansson, Robert" <Robert_C._Johansson@omb.eop.gov>

cc

"Schwab, Margo" <Margo_Schwab@omb.eop.gov>, Ron Evans/RTP/USEPA/US@EPA,
Lisa Conner/RTP/USEPA/US@EPA

Subject

Your proposed footnote language on PM expert elicitation 

Margo/Rob:  

Attached below, pls find Lisa Conner's recommended edits to the language
you asked us to add to the footnote.

Our question about the last sentence is:  why is it needed?  

FN #3: As discussed in Chapter 6, one way in which we characterize the
model uncertainty associated with the relationship between particulate
matter and premature mortality was to conduct an expert elicitation. 
The elicitation yielded twelve different functions, generated by asking
12 experts a structured set of questions, leading each to articulate a
functional form for the relationship, in a probabilistic estimate of
uncertainty.  Among the twelve experts, Expert K's function
characterizes the weakest relationship between PM and premature
mortality, whereas Expert E's function characterizes the strongest
relationship.

Marjorie C. Jones

Office of Air Quality Planning & Standards

Air Benefit and Cost Group, Mail Code C439-02

Health and Environmental Impacts Division

RTP, NC 27711

voice: (919) 541-2508

fax:     (919) 541-0839

Shipping/receiving: 4930 Old Page Rd.

Durham, NC 27709