   UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

        WASHINGTON DC 20460

                                                                        
                                        	      			                     

June 3, 2011

         OFFICE OF 

AIR AND RADIATION

MEMORANDUM

SUBJECT:	Supporting Documentation for Camelina Direct Final Rulemaking

FROM:	Sharyn Lie, Office of Transportation and Air Quality

TO:		Docket EPA-HQ-OAR-XXX

The following documents were used to support the calculations presented
in the Camelina Direct Final Rulemaking and associated Notice of
Proposed Rulemaking.  

“Final Camelina Calculations for Docket.xls”

This document contains information on the assumptions, conversion
factors, yields, energy use, GHG emission, and net returns used in the
camelina Direct Final Rule. 

N20 emissions included in “N2O” tab are taken from the “N2O
Summary” tab of the “Final Camelina N2O Calculations for
Docket.xls” described below.  

Camelina fertilizer application rates, energy use, and yields are taken
from the literature search, which are summarized in the “lit review”
tab and described in the Federal Register Notice.  

 “Final Camelina N2O Calculations for Docket.xls”

This document contains the direct fertilizer N2O emissions, indirect
fertilizer N2O emissions, direct N2O emissions from crop residue, and
indirect N2O emissions from crop residue for camelina and soybean
biodiesel production in the U.S.  

The nitrogen fertilizer application rates for camelina are assumed to be
40 pounds/acre, References for these articles are included in the
Federal Register notice associated with this docket.  

The nitrogen fertilizer application rates for soybeans are based on
regional application rates used in the FASOM model.  These application
rates are documented in the Final RFS2 Rulemaking Docket:
EPA-HQ-OAR-2005-0161-3178.

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