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PostedDate:  06/01/2007 09:00:25 AM
Recipients:  <Margo_Schwab@omb.eop.gov>,CN=Marjorie Jones/OU=RTP/O=USEPA/C=US@EPA,<Robert_C._Johansson@omb.eop.gov>,fann.neal@epa.gov,Bryan Hubbell
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Subject:  PRB sensitivity as threshold in RIA analysis
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Neal and I have talked briefly with Bryan about the idea of using Harvey's 
PRB sensitivity analysis as the basis for a threshold like sensitivity for 
the purpose of the RIA benefits.  As we have described it to him, he 
concurred with us that we should not be doing this kind of additional 
assessment, it does not really translate to the benefits analysis.  If you 
wish to discuss this further, please give Bryan a call to ensure that he 
has a good understanding of what you are proposing and why.  Thanks.


Ron Evans
Leader, Air Benefit & Cost Group
HEID/OAQPS/OAR/EPA
Mail Drop C-439-02
919-541-5488
919-541-0839 fax




