Document ID: EPA-HQ-OAR-2007-0225-0299
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-03-19T04:00Z

Ron Evans/RTP/USEPA/US

03/11/2008 08:59 AM

	

To

"King, Heidi R." <Heidi_R._King@omb.eop.gov>

cc

"Schwab, Margo" <Margo_Schwab@omb.eop.gov>, "Johansson, Robert"
<Robert_C._Johansson@omb.eop.gov>, fann.neal@epa.gov, Bryan Hubbell,
Tricia Crabtree/RTP/USEPA/US@EPA, Lydia Wegman, Janet
Cakir/RTP/USEPA/US@EPA

Subject

Re: Ron - RIA comments attached

Heidi, we have reviewed the language conforming changes for the
secondary language you provided in the attached.   Our only comment
concerns the motivation for not doing the analysis.   We would delete
the one sentence and adjust the last per edits below.   These changes
reflect why we did not do teh analysis.

Well-developed techniques exist to provide monetary estimates of these
benefits to agricultural producers and to consumers. These techniques
use models of planting decisions, yield response functions, and the
supply of and demand for agricultural products. The resulting welfare
measures are based on predicted changes in market prices and production
costs. Models also exist to measure benefits to silvicultural producers
and consumers. There is considerable uncertainty, however, in such
estimates, including the fact that the extensive management of
agricultural crops may mitigate the potential O3-related effects.  For
this reason, the estimates of economic crop loss developed using the
updated AGSIM model were not relied on for this analysis of alternative
O3 standards.  In addition, these models have not been adapted for use
in analyzing ozone-related forest impacts.  Again, because there
commercial activities are highly managed the potential benefits of
alternative O3 standards are uncertain.  Because of these uncertainties
and resource limitations, we are unable to provide benefits estimates
for the commercial production of agricultural and silvaculture
commodities.

"King, Heidi R." <Heidi_R._King@omb.eop.gov> 

03/10/2008 05:18 PM

	

To

Ron Evans/RTP/USEPA/US@EPA

cc

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

Subject

Ron - RIA comments attached

 [attachment "NAAQS Ozone RIA comments_20080310_v2.doc" deleted by Ron
Evans/RTP/USEPA/US] [attachment "RIA P 7-18_20080310.doc" deleted by Ron
Evans/RTP/USEPA/US]