October 30, 2008

MEMORANDUM

TO: 			Air Docket EPA-HQ-OAR-2005-0161

SUBJECT:	Food and Agricultural Policy Research Institute (FAPRI) Model
Results for Lifecycle GHG Assessment

This memorandum accompanies two spreadsheets placed on the docket that
include results from the FAPRI model.  

The first spreadsheet includes FAPRI projections of crop area and crop
production for seven renewable fuel volume cases, including the Control
Case.  The spreadsheet calculates the change in crop area and crop
production from the Control Case to each of the other cases.  These
calculations were used to estimate lifecycle GHG emissions for corn
ethanol, soy-based biodiesel, switchgrass ethanol, and imported
sugarcane ethanol.  For more information about the scenarios modeled,
and the use of the FAPRI results refer to DRIA Chapter 2.

The second spreadsheet contains FAPRI livestock projections for the same
seven renewable fuel volume cases.  The spreadsheet calculates the
change in livestock populations from the Control Case to each of the
other cases.  For more information about the FAPRI livestock projections
and how they were used for lifecycle GHG assessment refer to DRIA
Chapter 2.

 

