Document ID: EPA-HQ-OAR-2007-0225-0238
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-03-12T04:00Z

Ron Evans/RTP/USEPA/US

10/01/2007 12:06 PM

	

To

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

cc

Subject

RE: RESEND:  SAB letter on extrapolated costs

I just sent a note to Jim DeMocker who runs the 812 analysis for OAR to
look into your questions.  He is out of the office until the 8th.  Can
you wait until next week for answers on these contextual questions?

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

10/01/2007 10:48 AM

	

To

Ron Evans/RTP/USEPA/US@EPA

cc

Subject

RE: RESEND:  SAB letter on extrapolated costs

Can you provide the context for this letter?  It appears as though the

questions were being posed for previous rulemakings; i.e., what was the

ozone naaqs std being modeled in the background review document?  

"The Project Team has been unable to identify measures that yield

sufficient emission

reductions to comply with the National Ambient Air Quality Standards

(NAAQS) and relies on

unidentified pollution control measures to make up the difference.

Emission reductions attributed to

unidentified measures appear to account for a large share of emission

reductions required for a few

large metropolitan areas but a relatively small share of emission

reductions in other locations and

nationwide."

Which naaqs and levels does this refer to?

Rob