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**December 14, 2011 MEMORANDUM**  **TO: Air Docket**  **EP A**  **- HQ**  **- OAR** **- 2011**  **- 0542**  **SUBJECT: Supporting Documentation for Analysis of Lifecycle**  **Greenhouse Gas**

**(GHG) Emissions f**

**rom Palm Oil**  **- Based**  **Biodiesel and Renewable**  **Diesel** This memorandum accompanies information r elated to EPA’s anal ys is of lifecycle greenhouse gas (GHG) emissions from palm oil
- based biodiesel and renewable diesel
. As explained in the preamble to the Notice of Data Availability (N O DA), o ur analy sis utilizes several data sources and models. To fac ilitate public review, below is a brief description of the informational materials which accompany this memorandum
. **1. Summary of Modeling Inputs and Assumptions**  This memorandum provides information on the key inputs and assumptions used in EPA’s lifecyc le anal ys is of palm oil used as a feedstock to produce biodiesel and renewable diesel
. Assumptions include crop yields, energy use, energy

sources, ferti lizer use, co
- products , and other important factors in our lifecycle anal ys is. **2. Consideration of Un**  **certainty** This memorandum provides additional information regarding consideration of uncertainty in our modeling of the lifecycle GHG emissions associated with the palm oil
- based biodiesel and renewable diesel fuel produ ction pathway s anal yz ed in the Notic e of Data Availability (NODA). **3 . Lifecycle**  **GHG Emissions Results**  A spreadsheet that integrate s results from all stages of the fuel life cycle to calculate lifecycle GHG emissions from the production and use of the palm oil
- based biodiesel and renewable d iesel pathway s anal yz ed . The lifecycle GHG reductions are calculated as percent em issions reductions compared to the statutory 2005 petroleum baseline
. **4 . Calculation of International Agricultural Impacts from the**  **FAPRI -**  **CARD Model**  This spreadsheet inclu des calculations that convert the raw FAPRI
- CARD model results into differences between scenarios to determine biofuel
- in du ced GHG emissions impacts associated with the palm oil
- based biofuel pathway s anal yz ed. **5 . Spatial Modeling of Future Oil Palm Expa**  **nsion in Indonesia** This report explains the models, data and assumptions used to project the future locations of palm oil expansion in Indonesia for the scenarios modeled . The results include the area of palm oil expansion by

administrative unit, land cov er type converted and soil type converted. The results are used to calculate land use change GHG emissions in Indonesia for the scenarios modeled. **6 . Spatial Modeling of Future Oil Palm Expansion in Malaysia** 2

This report explains the models, data and ass umptions used to project the future locations of palm oil expansion in Malay sia for the scenarios modeled. The results include the area of palm oil expansion by

administrative unit, land cover type converted and soil type converted. The results are used to calculate land use change GHG emissions in Malay sia for the scenarios modeled. **7 . High Resolution Land Use Change Analysis of Oil Palm Plantations in Sumatra and**  **Kalimantan Circa 2000** This report documents our anal ys is of remote sensing data to map ar eas of oil palm cultivation in Indonesia in the 2000 time period . The resulting spatial map was used as a data input to the spatial modeling of future oil palm expansion in Indonesia
. **8 .**  **High Resolution Land Use Change Analysis of Oil Palm Plantations in Sumatra and**  **Kalimantan Circa 2010** This report documents our anal ys is of remote sensing data to map areas of oil palm cultivation in Indonesia in the 2010 time period . The resulting spatial map was used as a data input to the spatial modeling of future oil palm expansion in Indonesia
. **9. Revisions to Land Conversion Emission Factor’s since the RFS2 Final Rule** This report explains the revisions made , based on new data , since the RFS2 final rule to the land conversion emissions factors used in our anal ys i s of land use change GHG emissions. Such revisions include updates to our treatment of harvested wood products, oil palm carbon stocks, peat soil assumptions and forest carbon stocks.