[Federal Register Volume 77, Number 242 (Monday, December 17, 2012)]
[Rules and Regulations]
[Pages 74592-74607]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-30100]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 80
[EPA-HQ-OAR-2011-0542; FRL-9760-2]
Supplemental Determination for Renewable Fuels Produced Under the
Final RFS2 Program From Grain Sorghum
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
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SUMMARY: EPA is issuing a supplemental rule associated with the
Renewable Fuel Standard (RFS) program. This final rule contains a
lifecycle GHG analysis for grain sorghum ethanol and a regulatory
determination that grain sorghum ethanol qualifies as a renewable fuel
under the RFS Program. EPA's analysis indicates that ethanol made from
grain sorghum at dry mill facilities that use natural gas for process
energy meets the lifecycle greenhouse gas emissions reduction threshold
of 20 percent compared to the baseline petroleum fuel it would replace,
and therefore qualifies as renewable fuel. It also contains our
regulatory determination that grain sorghum ethanol produced at dry
mill facilities using specified forms of biogas for both process energy
and most electricity production, has lifecycle GHG emission reductions
of more than 50 percent compared to the baseline petroleum fuel it
would replace, and that such grain sorghum ethanol qualifies as an
advanced biofuel under the RFS Program.
DATES: This final rule is effective on December 17, 2012.
ADDRESSES: EPA has established a docket for this action under Docket ID
No. EPA-HQ-OAR-2011-0542. All documents in the docket are listed in the
www.regulations.gov index. Although listed in the index, some
information is not publicly available, e.g., CBI or other information
whose disclosure is restricted by statute. Certain other material, such
as copyrighted material, will be publicly available only in hard copy.
Publicly available docket materials are available either electronically
in www.regulations.gov or in hard copy at the Air and Radiation Docket
and Information Center, EPA/DC, EPA West, Room 3334, 1301 Constitution
Ave. NW., Washington, DC 20004. The Public Reading Room is open from
8:30 a.m. to 4:30 p.m., Monday through Friday, excluding legal
holidays. The telephone number for the Public Reading Room is (202)
566-1744, and the telephone number for the Air Docket is (202) 566-
1742.
FOR FURTHER INFORMATION CONTACT: Jefferson Cole, Office of
Transportation and Air Quality, Transportation and Climate Division,
Environmental Protection Agency, 1200 Pennsylvania Ave. NW.,
Washington, DC 20460 (MC: 6041A); telephone number: 202-564-1283; fax
number: 202-564-1177; email address: [email protected].
SUPPLEMENTARY INFORMATION:
Outline of This Preamble
I. General Information
A. Does this action apply to me?
II. Analysis of Lifecycle Greenhouse Gas Emissions
A. Methodology
1. Scope of Analysis
2. Models Used
3. Scenarios Modeled for Impacts of Increased Demand for Grain
Sorghum
4. Model Modifications
B. Results
1. Agro-Economic Impacts
2. International Land Use Change Emissions
3. Grain Sorghum Ethanol Processing
4. Results of Lifecycle Analysis for Ethanol From Grain Sorghum
(Using Dry Mill Natural Gas)
5. Results of Lifecycle Analysis for Ethanol From Grain Sorghum
(Using Biogas for Process Energy and On-Site Electricity Production)
6. Other Ethanol Processing Technologies
C. Consideration of Lifecycle Analysis Results
1. Implications for Threshold Determinations
2. Consideration of Uncertainty
D. Other Comments Received
E. Summary
III. Statutory and Executive Order Reviews
A. Executive Order 12866: Regulatory Planning and Review and
Executive Order 13563: Improving Regulation and Regulatory Review
B. Paperwork Reduction Act
C. Regulatory Flexibility Act
D. Unfunded Mandates Reform Act
E. Executive Order 13132: Federalism
F. Executive Order 13175: Consultation and Coordination With
Indian Tribal Governments
G. Executive Order 13045: Protection of Children From
Environmental Health and Safety Risks
H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use
I. National Technology Transfer and Advancement Act
J. Executive Order 12898: Federal Actions To Address
Environmental Justice in Minority Populations and Low-Income
Populations
K. Congressional Review Act
IV. Statutory Provisions and Legal Authority
I. General Information
A. Does this action apply to me?
Entities potentially affected by this action are those involved
with the production, distribution, and sale of transportation fuels,
including gasoline and diesel fuel or renewable fuels such as biodiesel
and renewable diesel. Regulated categories include:
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NAICS \1\ Examples of potentially regulated
Category codes SIC\2\ codes entities
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Industry................................... 324110 2911 Petroleum Refineries.
Industry................................... 325193 2869 Ethyl alcohol manufacturing.
Industry................................... 325199 2869 Other basic organic chemical
manufacturing.
Industry................................... 424690 5169 Chemical and allied products
merchant wholesalers.
Industry................................... 424710 5171 Petroleum bulk stations and
terminals.
Industry................................... 424720 5172 Petroleum and petroleum products
merchant wholesalers.
Industry................................... 454319 5989 Other fuel dealers.
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\1\ North American Industry Classification System (NAICS).
\2\ Standard Industrial Classification (SIC) system code.
This table is not intended to be exhaustive, but rather provides a
guide for readers regarding entities likely to engage in activities
that may be affected by today's action. To determine whether your
activities would be affected, you should carefully examine the
applicability criteria in 40 CFR part 80, subpart M. If you have any
questions regarding the applicability of this action to a particular
entity, consult the person listed in the preceding section.
[[Page 74593]]
II. Analysis of Lifecycle Greenhouse Gas Emissions
A. Methodology
1. Scope of Analysis
On March 26, 2010, the Environmental Protection Agency (EPA)
published changes to the Renewable Fuel Standard program regulations as
required by 2007 amendments to CAA 211(o). This rulemaking is commonly
referred to as the ``March, 2010 RFS2 final rule''. As part of the
March, 2010 RFS2 final rule we analyzed various categories of biofuels
to determine whether the complete lifecycle GHG emissions (domestic and
international) associated with the production, distribution, and use of
those fuels meet minimum lifecycle greenhouse gas reduction thresholds
as specified in CAA section 211(o) (i.e., 60% for cellulosic biofuel,
50% for biomass-based diesel and advanced biofuel, and 20% for other
renewable fuels). Our final rule focused our lifecycle analyses on
fuels that were anticipated to contribute relatively large volumes of
renewable fuel by 2022 and thus did not cover all fuels that either are
contributing or could potentially contribute to the program. In the
preamble to the final rule, EPA indicated that it had not completed the
GHG emissions impact analysis for several specific biofuel production
pathways but that this work would be completed through supplemental
rulemaking processes. Since the final rule was issued, we have
continued to examine several additional pathways. On June 12, 2012, we
published a Notice of Data Availability Concerning Renewable Fuels
Produced From Grain Sorghum Under the RFS Program (see 77 FR 34915). In
that notice of data availability, we provided an opportunity for
comment on EPA's analysis of grain sorghum used as a feedstock to
produce ethanol under the RFS program. Today's final rule describes our
lifecycle analysis of ethanol made from grain sorghum (``grain sorghum
ethanol'') and presents our determination that grain sorghum ethanol
qualifies as renewable fuel (20% lifecycle GHG reduction as compared to
baseline fuel) or as advanced biofuel (50% lifecycle GHG reduction as
compared to baseline fuel) if produced pursuant to specified pathways.
The modeling approach EPA used in this analysis is the same general
approach used in the March, 2010 RFS2 final rule for lifecycle analyses
of other biofuels.\1\ The March, 2010 RFS2 final rule preamble and
Regulatory Impact Analysis (RIA) provides further discussion of our
approach.
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\1\ EPA. 2010. Renewable Fuel Standard Program (RFS2) Regulatory
Impact Analysis. EPA-420-R-10-006. http://www.epa.gov/oms/renewablefuels/420r10006.pdf.
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2. Models Used
The analysis EPA has prepared for grain sorghum ethanol uses the
same set of models that was used for the March, 2010 RFS2 final rule.
To estimate the domestic agricultural impacts presented in the
following sections, we used the Forestry and Agricultural Sector
Optimization Model (FASOM) developed by Texas A&M University. To
estimate the international agricultural sector impacts, we used the
Food and Agricultural Policy and Research Institute international
models as maintained by the Center for Agricultural and Rural
Development (FAPRI-CARD) at Iowa State University. For more information
on the FASOM and FAPRI-CARD models, refer to the March, 2010 RFS2 final
rule preamble (75 FR 14670) or the March, 2010 RFS2 final rule
Regulatory Impact Analysis (RIA).\2\ The models require a number of
inputs that are specific to the pathway being analyzed, including
projected yields of feedstock per acre planted, projected fertilizer
use, and energy use in feedstock processing and fuel production. The
docket includes detailed information on model inputs, assumptions,
calculations, and the results of our assessment of the lifecycle GHG
emissions performance of specified pathways for producing grain sorghum
ethanol.
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\2\ EPA. 2010. Renewable Fuel Standard Program (RFS2) Regulatory
Impact Analysis. EPA-420-R-10-006. http://www.epa.gov/oms/renewablefuels/420r10006.pdf. Additional RFS2 related documents can
be found at http://www.epa.gov/otaq/fuels/renewablefuels/regulations.htm.
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3. Scenarios Modeled for Impacts of Increased Demand for Grain Sorghum
To assess the impacts of an increase in renewable fuel volume from
business-as-usual (what is likely to have occurred without the RFS
biofuel mandates) to levels required by the statute, we established a
control case and other cases for a number of biofuels analyzed for the
March, 2010 RFS2 final rule. The control case included a projection of
renewable fuel volumes that might be used to comply with the RFS
renewable fuel volume mandates in full. The other cases are designed
such that the only difference between a given case and the control case
is the volume of an individual biofuel, all other volumes remaining the
same. In the March, 2010 RFS2 final rule, for each individual biofuel,
we analyzed the incremental GHG emission impacts of increasing the
volume of that fuel to the total mix of biofuels needed to meet the
EISA requirements.
For the analysis of grain sorghum ethanol, we applied the same
methodology as in the March, 2010 RFS2 final rule. In this case, we
compared a scenario that included 200 million gallons of grain sorghum
ethanol to another scenario that included 300 million gallons of grain
sorghum ethanol, ensuring that all other renewable fuel volumes are
equal between the two scenarios. The scenario with 200 million gallons
of grain sorghum ethanol will henceforth be referred to as the
``control case,'' which was developed to account for the current
production of grain sorghum ethanol which is approximately 200 million
gallons per year (see Chapter 1 of the March, 2010 RFS2 final rule
RIA). All other volumes for each individual biofuel in this new control
case remain identical to the control case used in the March, 2010 RFS2
final rule. The scenario with 300 million gallons of grain sorghum
ethanol will be referred to as the ``grain sorghum'' case. For the
grain sorghum case, our modeling assumes approximately 300 million
gallons of sorghum ethanol would be consumed in the United States in
2022. The modeled scenario includes 2.06 billion lbs of grain sorghum
to be used to produce the additional 100 million gallons of ethanol in
2022.
Our volume scenario of approximately 200 million gallons of grain
sorghum ethanol in the control case, and 300 million gallons in the
grain sorghum case in 2022, is based on several factors including
historical volumes of grain sorghum ethanol production, potential
feedstock availability and other competitive uses (e.g., animal feed or
exports). Our assessment is described further in the inputs and
assumptions document that is available through the docket (EPA 2011).
Based in part on consultation with experts at the United States
Department of Agriculture (USDA) and industry representatives, we
believe that these volumes are reasonable for the purposes of
evaluating the impacts of producing additional volumes of ethanol from
grain sorghum.
The FASOM and FAPRI-CARD models, described above, project how much
grain sorghum will be supplied to ethanol production from a combination
of increased production, decreases in others uses (e.g., animal feed),
and decreases in exports, in going from the control case to the grain
sorghum case.
[[Page 74594]]
4. Model Modifications
Based on information from industry stakeholders, as well as in
consultation with USDA, both the FASOM and FAPRI-CARD models assume
perfect substitution in the use of grain sorghum and corn in the animal
feed market in the U.S. Therefore, when more grain sorghum is used for
ethanol production, grain sorghum that is used in feed decreases.
Either additional corn or additional sorghum production will be used in
the feed market to make up for this decrease, depending upon the
relative cost of additional production. This assumption is based on
conversations with industry and the USDA, reflecting the primary use of
sorghum in the U.S. as animal feed, just like corn. We received a
number of comments in response to our Notice of Data Availability
(NODA) for Renewable Fuels Produced from Grain Sorghum Under the RFS
Program (77 FR 34915, June 12, 2012) that support this assumption.
The United States is one of the largest producers and exporters of
grain sorghum. Two other large producers of grain sorghum, India and
Nigeria, do not actively participate in the global trade market for
sorghum. Rather, all grain sorghum in those two countries is produced
for domestic consumption. Therefore, as the U.S. diverts some of its
exports of grain sorghum for the purposes of ethanol production, we
would expect close to no reaction in the production levels of grain
sorghum in India and Nigeria. Historical data on prices, production,
and exports from USDA, FAOSTAT (the Statistics Division of the Food and
Agriculture Organization of the U.N.), and FAPRI support this
assumption.\3\ We received several comments in response to our NODA
that supported our proposed assumption that production of grain sorghum
in India and Nigeria is not impacted by changes in production and trade
of grain sorghum in the U.S. It should be noted that India and Nigeria
are unique in this behavior in regards to grain sorghum production,
consumption and trade. Other countries are expected to vary their
harvested area in response to changes in U.S. grain sorghum exports,
which can be seen in Table II-4 below.
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\3\ See Memo to the Docket, Docket Number EPA-HQ-OAR-2011-0542,
Dated May 18, 2012 and personal communication with USDA.
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B. Results
As we did for our analysis of other feedstocks in the March, 2010
RFS2 final rule, we assessed what the GHG emissions impacts would be
from the use of additional volumes of sorghum for biofuel production.
The information provided in this section discusses the assumptions and
outputs of the analysis using the FASOM and FAPRI-CARD agro-economic
models to determine changes in the agricultural and livestock markets.
These results from FASOM and FAPRI-CARD are then used to determine the
GHG emissions impacts due to land use change and other factors.
Finally, we include our analysis of the GHG emissions associated with
different processing pathways and how the choice of technologies affect
the lifecycle GHG emissions associated with grain sorghum ethanol.
As discussed in the March, 2010 RFS2 final rule and the
accompanying peer review, there are inherent challenges in reconciling
the results from two different models. However, using two models
provides a more complete and robust analysis than either model would be
able to provide alone. We have attempted to align as many of the key
assumptions as possible to get a consistent set of modeling results
although there are structural differences in the models that account
for some of the differences in the model results. For example, since
FASOM is a long-term dynamic optimization model, short-term spikes are
smoothed out over the five year reporting period. In comparison, the
FAPRI-CARD model captures annual fluctuations that may include short-
term supply and demand responses. In addition, some of the
discrepancies may be attributed to different underlying assumptions
pertaining to elasticities of supply and demand for different
commodities. These differences, in turn, affect projections of imports
and exports, acreage shifting, and total consumption and production of
various commodities.
1. Agro-Economic Impacts
EPA received no significant comments regarding the results from the
FASOM and FAPRI-CARD models, nor did EPA receive recommendations that
the models be re-run with different assumptions. Therefore, the results
from these two models are identical to those results presented and
discussed in the NODA. For more detailed results, please refer to the
NODA. Given the importance of the land use change results for our
emissions analysis we are presenting these identical results for
reference in this final rule.
In the FASOM model, the increase in grain sorghum area harvested is
relatively modest, at an additional 4 thousand acres, due to the fact
that demand for grain sorghum for use in ethanol production is being
met by a shift of grain sorghum from one existing use (in the animal
feed market) to another (ethanol production). Meeting the subsequent
gap in supply of animal feed, however, leads to an increase of 141
thousand corn acres in 2022. Another way to describe this interaction
is that it is relatively more profitable to take grain sorghum out of
the feed market for ethanol production and grow more corn, than it is
to simply grow more grain sorghum for ethanol production. Due to the
increased demand for corn production and harvested area, soybean
harvested area would decrease by 105 thousand acres (corn and soybeans
often compete for land). Other crops in the U.S., such as wheat, hay,
and rice, are projected to have a net increase of 53 thousand acres.
Table II-1--Summary of Projected Change in Crop Harvested Area in the U.S. in 2022 in the FASOM Model
[Thousands of acres]
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Grain sorghum
Control case case Difference
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Sorghum......................................................... 11,108 11,111 4
Corn............................................................ 77,539 77,680 141
Soybeans........................................................ 69,896 69,791 -105
Other........................................................... 154,511 154,564 53
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Total....................................................... 313,054 313,146 92
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[[Page 74595]]
As demand for grain sorghum increases for ethanol production in the
U.S., the FAPRI-CARD model estimates that the U.S. will decrease
exports of grain sorghum and increase exports of corn to partially
satisfy the gap of having less grain sorghum in the worldwide feed
market. This combination of impacts on the world trade of grain sorghum
and corn has effects both on major importers, as well as on other major
exporters. For example, Mexico, one of the largest importers of grain
sorghum, decreases its imports of grain sorghum and increases its
imports of corn. Brazil also contributes more corn to the global market
by increasing its exports.
The change in trade patterns directly impacts the amount of
production and harvested crop area around the world. Harvested crop
area for grain sorghum is not only predicted to increase in the U.S.,
but also in Mexico (7.8 thousand acres) and other parts of the world.
Worldwide grain sorghum harvested area outside of the U.S. would
increase by 39.3 thousand acres. Similarly, the increase in the demand
for corn would lead to an increase of 36.8 thousand harvested acres
outside of the U.S. While soybean harvested area would decrease in the
U.S., Brazil would increase its soybean harvested area (18.4 thousand
acres) to satisfy global demand. Although worldwide soybean harvested
area decreases by 11.7 thousand acres, non-U.S. harvested area
increases by 11.2 thousand acres.
Overall harvested crop area in other countries also increase,
particularly in Brazil. Brazil's total harvested area is predicted to
increase by 32.6 thousand acres by 2022. This is mostly comprised of an
increase in corn of 18.1 thousand acres, and an increase in soybeans of
18.4 thousand acres, along with minor changes in other crops. More
details on projected changes in world harvested crop area in 2022 can
be found below in Table II-2, Table II-3, Table II-4, and Table II-5.
Table II-2--Summary of Projected Change in International (Non-U.S.) Harvested Area by Country in 2022 in the
FAPRI-CARD Model
[Thousands of acres]
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Grain sorghum
Control case case Difference
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Brazil.......................................................... 137,983 138,016 33
China........................................................... 272,323 272,334 11
Africa and Middle East.......................................... 315,843 315,892 48
Rest of World................................................... 1,301,417 1,301,441 24
International Total (non-U.S.).................................. 2,027,567 2,027,682 115
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Table II-3--Summary of Projected Change in International (Non-U.S.) Harvested Area by Crop in 2022 in the FAPRI-
CARD Model
[Thousands of acres]
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Grain sorghum
Control case case Difference
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Sorghum......................................................... 95,108 95,148 39
Corn............................................................ 307,342 307,379 37
Soybeans........................................................ 202,980 202,991 11
Other........................................................... 1,422,137 1,422,165 28
International Total (non-U.S.).................................. 2,027,567 2,027,682 115
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Table II-4--Summary of Projected Change in International (Non-U.S.) Grain Sorghum Harvested Area by Country in
2022 in the FAPRI-CARD Model
[Thousands of acres]
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Grain sorghum
Control case case Difference
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Mexico.......................................................... 4,569 4,576 8
Argentina....................................................... 1,915 1,917 2
India........................................................... 22,261 22,261 0
Nigeria......................................................... 18,841 18,841 0
Other Africa and Middle East.................................... 37,833 37,856 23
Rest of World................................................... 9,689 9,695 6
International Total (non-U.S.).................................. 95,108 95,148 39
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Table II-5--Summary of Projected Change in International (Non-U.S.) Corn Harvested Area by Country in 2022 in
the FAPRI-CARD Model
[Thousands of Acres]
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Grain sorghum
Control case case Difference
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Africa and Middle East.......................................... 77,220 77,223 4
Asia............................................................ 108,751 108,764 13
[[Page 74596]]
Brazil.......................................................... 20,935 20,953 18
India........................................................... 20,176 20,180 5
Other Latin America............................................. 39,599 39,594 -5
Rest of World................................................... 40,661 40,664 2
International Total (non-U.S.).................................. 307,342 307,379 37
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More detailed information on the agro-economic modeling can be
found in the accompanying docket.
2. International Land Use Change Emissions
The methodology used in today's assessment of grain sorghum as an
ethanol feedstock is the same as that used in the March 2010 RFS2 final
rule for analyses of other biofuel pathways. However, we have updated
some of the data underlying the GHG emissions from international land
use changes; therefore, we are providing additional detail on these
modifications in this section.
In our analysis, GHG emissions per acre of land conversion
internationally (i.e., outside of the United States) are determined
using the emissions factors developed for the March 2010 RFS2 final
rule, following IPCC guidelines. In addition, estimated average forest
carbon stocks were updated based on a new study which uses a more
robust and higher resolution analysis. For the March 2010 RFS2 final
rule, international forest carbon stocks were estimated from several
data sources each derived using a different methodological approach.
Two new peer-reviewed analyses on forest carbon stock estimation have
been completed since the release of the March 2010 RFS2 final rule, one
for three continental regions by Saatchi et al.\4\ and the other for
the EU by Gallaun et al.\5\ We have updated our forest carbon stock
estimates based on these new studies because they represent significant
improvements as compared to the data used in the March 2010 RFS2 final
rule. These updated forest carbon stock estimates were previously used
in EPA's Notice of Data Availability Concerning Renewable Fuels
Produced From Palm Oil Under the RFS Program (77 FR 4300, January 27,
2012). Forest carbon stocks across the tropics are important in our
analysis of grain sorghum ethanol because a significant amount of the
land use changes in the scenarios modelled occur in tropical regions
such as Brazil. In the scenarios modelled, there are also much smaller
amounts of land use change impacts in the EU related to grain sorghum
ethanol production. In the interest of using the best available data,
we have incorporated the improved forest carbon stocks data in our
analysis of lifecycle GHG emissions related to grain sorghum ethanol.
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\4\ Saatchi, S.S., Harris, N.L., Brown, S., Lefsky, M.,
Mitchard, E.T.A., Salas, W., Zutta, B.R., Buermann, W., Lewis, S.L.,
Hagen, S., Petrova, S., White, L., Silman, M. And Morel, A. 2011.
Benchmark map of forest carbon stocks in tropical regions across
three continents. PNAS doi: 10.1073/pnas.1019576108.
\5\ Gallaun, H., Zanchi, G., Nabuurs, G.J., Hengeveld, G.,
Schardt, M., Verkerk, P.J. 2010. EU-wide maps of growing stock and
above-ground biomass in forests based on remote sensing and field
measurements. Forest Ecology and Management 260: 252-261.
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Preliminary results for Latin America and Africa from Saatchi et
al. were incorporated into the March 2010 RFS2 final rule, but Asia
results were not included due to timing considerations. The Saatchi et
al. analysis is now complete, and so the final map was used to
calculate updated area-weighted average forest carbon stocks for the
entire area covered by the analysis (Latin America, sub-Saharan Africa
and South and Southeast Asia). The Saatchi et al. results represent a
significant improvement over previous estimates because they
incorporate data from more than 4,000 ground inventory plots, about
150,000 biomass values estimated from forest heights measured by space-
borne light detection and ranging (LIDAR), and a suite of optical and
radar satellite imagery products. Estimates are spatially refined at 1-
km grid cell resolution and are directly comparable across countries
and regions.
In the March 2010 RFS2 final rule, forest carbon stocks for the
European Union were estimated using a combination of data from three
different sources. Issues with this `patchwork' approach were that the
biomass estimates were not comparable across countries due to the
differences in methodological approaches, and that estimates were not
spatially derived (or, the spatial data were not provided to EPA).
Since the release of the final rule, Gallaun et al. developed EU-wide
maps of above-ground biomass in forests based on remote sensing and
field measurements. MODIS data were used for the classification, and
comprehensive field measurement data from national forest inventories
for nearly 100,000 locations from 16 countries were also used to
develop the final map. The map covers the whole EU, the European Free
Trade Association countries, the Balkans, Belarus, the Ukraine,
Moldova, Armenia, Azerbaijan, Georgia, and Turkey.
For both data sources, Saatchi et al. and Gallaun et al., we added
belowground biomass to reported aboveground biomass values using an
equation in Mokany et al.\6\
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\6\ Mokany, K., R.J. Raison, and A.S. Prokushkin. 2006. Critical
analysis of root:shoot ratios in terrestrial biomes. Global Change
Biology 12: 84-96.
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In our analysis, forest stocks are estimated for over 750 regions
across 160 countries. For some regions the carbon stocks increased as a
result of the updates and in others they declined. For comparison, we
ran our grain sorghum analysis using the old forest carbon stock values
used in the March 2010 RFS2 final rule and with the updated forest
carbon values described above. Using the updated forest carbon stocks
increased the land use change GHG emissions related to grain sorghum
ethanol by approximately 1.2 kilograms of carbon dioxide equivalent
emissions per million British thermal units of grain sorghum ethanol
(kgCO2e/mmBtu). Table II-6 includes the international land
use change GHG emissions results for the scenarios modeled, in terms of
kgCO2e/mmBtu. International land use change GHG emissions
for grain sorghum are estimated at 30 kgCO2e/mmBtu.
[[Page 74597]]
Table II-6--International Land Use Change GHG Emissions
[kgCO2e/mmBtu]
------------------------------------------------------------------------
Region Emissions
------------------------------------------------------------------------
Africa and Middle East.................................. 9
Asia.................................................... 5
Brazil.................................................. 14
India................................................... 1
Other Latin America..................................... 1
Rest of World........................................... 1
International Total (non-U.S.).......................... 30
------------------------------------------------------------------------
More detailed information on the land use change emissions can be
found in the accompanying docket.
3. Grain Sorghum Ethanol Processing
The dry milling process is the ethanol production process
considered here for producing ethanol from grain sorghum. In the dry
milling process, the grain sorghum is ground and fermented to produce
ethanol. The remaining distillers grains (DG) are then either left wet
if used in the near-term or dried for longer term use as animal feed.
For this analysis, the amount of grain sorghum used for ethanol
production as modeled by the FASOM and FAPRI-CARD models was based on
yield assumptions built into those two models. Specifically, the models
assume sorghum ethanol yields of 2.71 gallons per bushel for dry mill
plants (yields represents pure ethanol).
As per the analysis done in the March 2010 RFS2 final rule, the
energy consumed and emissions generated by a renewable fuel plant must
be allocated not only to the renewable fuel produced, but also to each
of the by-products. For grain sorghum ethanol production, this analysis
accounts for the DG co-product use directly in the FASOM and FAPRI-CARD
agricultural sector modeling described in the NODA. DG are considered a
replacement animal feed and thus reduce the need to make up for the
grain sorghum production that went into ethanol production. Since FASOM
takes the production and use of DG into account, no further allocation
was needed at the ethanol plant and all plant emissions are accounted
for there.
As described in the NODA, the GHG emissions from production of
ethanol from grain sorghum were calculated in the same way as other
fuels analyzed as part of the March 2010 RFS final rule. The GHG
emissions were calculated by multiplying the amount of the different
types of energy inputs at the grain sorghum ethanol plant (e.g.,
natural gas, coal, biogas, electricity) by emissions factors for
production and use of those energy sources.
The NODA described how purchased fuel and electricity use for grain
sorghum ethanol production was based on the energy use information for
corn ethanol production from the March 2010 RFS final rule analysis.
These numbers reflect future plant energy use to represent plants that
would be built to meet future requirements for increased renewable fuel
use, as opposed to current or historic data on energy used in ethanol
production. The numbers also reflect adjustments to account for the
fact that converting grain sorghum to ethanol will result in slightly
different energy use based on the difference in the grains and how they
are processed.
Process energy at the plant includes natural gas, coal, or biogas
used in boilers to produce steam, in dryers, in thermal oxidizers or
used in other production or process equipment. Process electricity is
used for running pumps, conveyers, fans, lights, and other electrical
equipment. Specifically related to the fuel production process,
electricity can be produced on-site or purchased/received from an off-
site supplier.
The emissions associated with energy used at grain sorghum ethanol
facilities, varies significantly among plants with respect to the
production process, type of fuel used (e.g., coal versus natural gas),
and whether electricity used at the facility comes from the grid or is
produced from low-GHG emissions fuels such as biogas from landfills,
waste treatment plants and/or waste digesters. Variation also exists
between the same type of plants using the same fuel source based on the
design of the production process such as the technology used to
separate the ethanol from the water, the extent to which the DG are
dried and whether other co-products are produced. Such different
pathways were considered for ethanol made from corn. Since for the most
part these same production processes are available for ethanol produced
from sorghum, our analyses considered a similar set of production
pathways for grain sorghum ethanol production. Our focus was to
differentiate among facilities based on key differences, namely the
type of plant, the type of fuel used and source of electricity.
For grain sorghum, we analyzed several combinations of different
process technologies and fuels to determine their impacts on lifecycle
GHG emissions. This section describes the different GHG impacts
associated with alternative processing technology and fuel options and
outlines specific process pathways that would be needed to meet
different GHG threshold requirements.
The NODA discussed how several technologies and fuel choices affect
emissions. Process energy fuel choice has a significant impact on
emissions from a sorghum ethanol plant. Switching from natural gas to
biogas from landfills, waste treatment plants and/or waste digesters,
for example, was shown to reduce lifecycle GHG emissions by
approximately 20 percentage points. Therefore, use of such biogas
provides a way for grain sorghum ethanol plants to reduce their GHG
emissions. However, in order for the biogas to count as a GHG reduction
mechanism under the grain sorghum ethanol pathways discussed in this
rulemaking it has to come from landfills, waste treatment plants, or
waste digesters. The reason for this is that those sources of biogas
are assumed to have zero upstream GHG impacts.
We received comments on the GHG emissions associated with the use
of biogas as a process energy source, specifically for biogas from
manure digesters. Development and operation of a manure digester system
results in fugitive methane and other emissions, though their use also
means emissions associated with alternative manure disposal methods are
avoided. Putting in place a manure digester and capturing methane will
result in a change of emissions from the existing disposal method.
There is guidance available for calculating these emission changes.\7\
Based on one application of this guidance, one commenter indicated that
the upstream GHG impacts of biogas production from a manure digester
would be a net increase in GHG emissions. Another commenter using their
own application of the guidance indicated that there would be a net
reduction in upstream GHG emissions from the use of biogas from a
manure digester.
---------------------------------------------------------------------------
\7\ See, e.g., ``Protocol for Quantifying and Reporting the
Performance of Anaerobic Digestion Systems for Livestock Manures,''
Prepared for the U.S. Environmental Protection Agency AgSTAR
Program, Prepared by: Eastern Research Group, Inc., March 2011, and
``Climate Leaders Greenhouse Gas Inventory Protocol Offset Project
Methodology for Project Type: Managing Manure with Biogas Recovery
Systems,'' Climate Protection Partnerships Division/Climate Change
Division, Office of Atmospheric Programs, U.S. Environmental
Protection Agency, August 2008, Version 1.3.
---------------------------------------------------------------------------
The differences in net emission estimates from manure digesters
depend upon the assumptions about the alternative manure disposal
methods. If the alternative disposal methods would not have resulted in
significant emissions (e.g., if no methane were generated or if the
methane generated were captured and destroyed) then the installation of
a manure digester could
[[Page 74598]]
lead to an increase in emissions. On the other hand, if there would
have been significant emissions from an alternative disposal method
that would be avoided, then the installation of a manure digester would
result in a decrease in net emissions. EPA's approach for projecting
the net emissions from manure digesters for the sorghum lifecycle GHG
calculations was to assume effectively zero net emissions from digester
biogas. This assumption is consistent with our treatment of biogas
emissions in previous RFS rulemakings.
Given the uncertainty in the range of possible alternative manure
disposal emissions, we feel this approach is reasonable. In order for
biogas from manure digesters to result in positive net GHG emissions,
the emissions from the alternative disposal method would have to be
close to zero. This would only be the case with limited types of
disposal in which the decomposition of the manure was mainly aerobic
and does not result in methane emissions, such as land application.
Although the majority of manure in the United States is handled as a
solid, producing little CH4, the general trend in manure management is
one of increasing use of liquid systems. The shift in manure management
practices is due in part to a shift toward larger livestock facilities
which typically use liquid manure management systems. Liquid systems
have higher potential CH4 emissions than dry systems.\8\ Alternatively,
the existing disposal methods could have emissions close to zero if
they were capturing methane emissions and destroying them, which is not
generally happening in current practice.\9\ It is possible that use of
manure digesters could provide a net GHG benefit as compared to
alternative disposal methods. However, we also do not have enough
information to include a generic GHG offset reduction for manure
digesters at this time. Assuming zero net emissions for present
purposes appears reasonable given the range of possibilities. We plan
to seek comment on the possible use of manure digester offsets as part
of a future rulemaking and clarify their use for this and other
pathways in Table 1 to Sec. 80.1426. Interested parties using manure
digesters may also submit a petition under the 40 CFR 80.1416 petition
process.
---------------------------------------------------------------------------
\8\ Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-
2010, U.S. EPA Section 6.2.
\9\ Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-
2010, U.S. EPA Annex 3 Section 3.10, the emissions factors used in
calculating methane emissions from manure management do not include
methane capture. EPA is not aware of any current or planned
regulations that would require methane capture and destruction from
existing manure management activities.
---------------------------------------------------------------------------
We also received comments to expand the discussion to include
``biomass energy'' that is not restricted to only biogas in the context
of a fuel source from landfills, waste treatment plants, and waste
digesters. The comments point to existing pathways in Table 1 to Sec.
80.1426 that include the use of biogas or biomass. We plan to clarify
the meaning of the term biomass through a separate rulemaking and will
consider the comments of adding biomass as a process energy source to
the grain sorghum ethanol pathway at that time. In the interim, we
believe it is preferable to issue today's rule identifying two
qualifying grain sorghum ethanol pathways without delay. Doing so
allows producers using these pathways the opportunity to generate RINs
while EPA evaluates adding a definition of biomass as an energy source
for use in biofuel production.
Another factor that influences GHG impacts from process energy use
is the percentage of DG that are dried. If a plant is able to reduce
the amount of DG it dries, process energy use and GHG emissions
decrease. The impact of going from 100% dry DG to 100% wet DG is larger
for natural gas plants (approximately a 10% reduction in overall GHG
emissions relative to the petroleum baseline) compared to biogas plants
because biogas plants already have low emissions from process energy.
The NODA also discussed how production facilities that utilize
combined heat and power (CHP) systems can also reduce GHG emissions
relative to less efficient system configurations. The CHP system
configuration considered in the NODA calculations were based on using a
boiler to power a turbine generator unit that produces electricity, and
using waste heat to produce process steam. There are provisions in our
regulations stating that combined heat and power (CHP), also known as
cogeneration, refers to industrial processes in which waste heat from
the production of electricity is used for process energy in the
renewable fuel production facility. Table 2 to Sec. 80.1426 includes
combined heat and power such that, on a calendar year basis, at least
90% of the thermal energy associated with ethanol production (including
thermal energy produced at the facility and that which is derived from
an off-site waste heat supplier), exclusive of any thermal energy used
for the drying of distillers grains and solubles, is used to produce
electricity prior to being used to meet the process heat requirements
of the facility.
We received comments that these current provisions only describe
``top cycle'' (high pressure) CHP systems. Commenters requested that we
also allow other types of CHP configurations (e.g., ``low pressure''
CHP systems). EPA recognizes that there are many different types of CHP
configurations and that some types that do not fit our current
regulatory provisions could have similar GHG reductions.
Although not exhaustive, Table II-7 shows the amount of process
fuel and electricity from the grid used at a grain sorghum ethanol
facility for the different technology and fuel options in terms of Btu/
gal of ethanol produced.
The energy use at dry mill ethanol plants was based on ASPEN models
developed by USDA and updated to reflect changes in technology out to
2022 as described in the March 2010 RFS2 final rule Regulatory Impact
Analysis (RIA) Chapter 1. The work done on grain ethanol production for
the March 2010 RFS2 final rule was based on converting corn to ethanol.
Converting grain sorghum to ethanol will result in slightly different
energy use based on difference in the grains and how they are
processed. The same ASPEN USDA models used for corn ethanol in the
final rule were also developed for grain sorghum ethanol. Based on the
numbers from USDA, a sorghum ethanol plant uses 96.3% of the thermal
process energy of a corn ethanol plant (3.7% less), and 99.3% of the
electrical energy (0.7% less).
[[Page 74599]]
Table II-7--Process Fuel and Electricity Options at Grain Sorghum Ethanol Facilities
[Btu/gallon of ethanol produced]
----------------------------------------------------------------------------------------------------------------
Grid
Fuel type and technology Natural gas Biogas use electricity
use use
----------------------------------------------------------------------------------------------------------------
Sorghum Ethanol--Dry Mill Natural Gas
----------------------------------------------------------------------------------------------------------------
No CHP, 100% Wet DG............................................. 16,449 .............. 2,235
Yes CHP, 100% Wet DG............................................ 18,605 .............. 508
No CHP, 0% Wet DG............................................... 27,599 .............. 2,235
Yes CHP, 0% Wet DG.............................................. 29,755 .............. 508
----------------------------------------------------------------------------------------------------------------
Sorghum Ethanol--Dry Mill Biogas
----------------------------------------------------------------------------------------------------------------
No CHP, 100% Wet DG............................................. .............. 16,449 2,235
Yes CHP, 100% Wet DG............................................ .............. 18,605 508
No CHP, 0% Wet DG............................................... .............. 27,599 2,235
Yes CHP, 0% Wet DG.............................................. .............. 29,755 508
----------------------------------------------------------------------------------------------------------------
As shown in Table II-7, the difference between CHP and non-CHP
plants is reflected in their use of different amounts of primary energy
(natural gas or biogas) and the amount of electricity used from the
grid. The difference in electricity used from the grid is independent
of the quantity of dry DG. Furthermore, as the GHG calculations are
based on the amount of fuel used times an emission factor plus the
amount of electricity used from grid times an emissions factor, the use
of CHP versus some other type of electricity generation system only
matters for natural gas plants. Although less biogas would be needed if
CHP is used versus standard electricity generation using biogas, the
GHG emissions are the same since the emission factor for biogas (when
it comes from landfills, waste treatment plants and/or waste digesters)
is zero. Therefore, because the only advanced biofuel pathway we are
adopting today for the production of grain sorghum ethanol involves use
of biogas for on-site electricity production, we do not need to specify
that CHP be used. We have therefore modified the final rule to instead
specify that for the advanced biofuel grain sorghum pathway, biogas
from landfills, waste treatment plants and/or waste digesters must be
used for on-site electricity production, and we have provided an
allowance for a certain amount of grid-purchased electricity that would
still be consistent with a finding of 50% lifecycle GHG reduction as
compared to baseline fuel. Any configuration of CHP, or a non-CHP
system, could be used for the on-site generation of electricity using
biogas. We have also included conforming changes to the regulatory
registration, recordkeeping and reporting requirements, to require
verification of the amount of grid electricity used at facilities using
this pathway.
The conforming changes include adding a new paragraph (f)(13) to
Section 80.1426 describing detailed requirements for the purchase,
measurement and use of biogas and electricity from the grid for
facilities using the advanced biofuel grain sorghum pathway. We have
also amended Section 80.1450 describing registration requirements for
facilities using the advanced biofuel grain sorghum pathway. Sections
80.1451 and 80.1454 are also amended to specify reporting and
recordkeeping requirements for this pathway.
The following Table II-8 shows the mean lifecycle GHG reductions
compared to the baseline petroleum fuel for a number of different grain
sorghum ethanol production technology pathways including natural gas
and biogas fired plants. In the following section, we provide detailed
analysis of the lifecycle GHG emissions for two scenarios. The first is
for a dry mill grain sorghum ethanol plant that uses natural gas for
process energy; the second is for a dry mill grain sorghum ethanol
plant that uses biogas for both process energy and for on-site
electricity production. These two scenarios were chosen as examples of
feasible technology that a plant can use to generate either
conventional or advanced fuel.
Table II-8--Lifecycle GHG Emission Reductions for Certain Dry Mill Grain
Sorghum Ethanol Facilities
[% change compared to petroleum gasoline]
------------------------------------------------------------------------
Fuel type and technology % Change
------------------------------------------------------------------------
Sorghum Ethanol--Dry Mill Natural Gas
------------------------------------------------------------------------
No On-Site Electricity Production, 100% Wet DG.......... -33
On-Site Electricity Production, using 0.15 kWh -36
electricity from the grid per gallon of ethanol, 100%
Wet DG.................................................
No On-Site Electricity Production, 0% Wet DG............ -22
On-Site Electricity Production, using 0.15 kWh -25
electricity from the grid per gallon of ethanol, 0% Wet
DG.....................................................
------------------------------------------------------------------------
Sorghum Ethanol--Dry Mill Biogas
------------------------------------------------------------------------
No On-Site Electricity Production, 100% Wet DG.......... -48
On-Site Electricity Production, using 0.15 kWh -53
electricity from the grid per gallon of ethanol, 100%
Wet DG.................................................
No On-Site Electricity Production, 0% Wet DG............ -47
On-Site Electricity Production, using 0.15 kWh -52
electricity from the grid per gallon of ethanol, 0% Wet
DG.....................................................
------------------------------------------------------------------------
The 0.15 kWh was based on data in Table II-7 converted to kWh per
gallon.
[[Page 74600]]
The docket for this final rule provides more details on our key
model inputs and assumptions (e.g., crop yields, biofuel conversion
yields, and agricultural energy use). These inputs and assumptions are
based on our analysis of peer-reviewed literature and consideration of
recommendations of experts from within the grain sorghum and ethanol
industries, USDA, and academic institutions.
4. Results of Lifecycle Analysis for Ethanol From Grain Sorghum (Using
Dry Mill Natural Gas)
Consistent with our approach for analyzing other pathways, our
analysis for grain sorghum ethanol includes a mid-point estimate as
well as a range of possible lifecycle GHG emission results based on
uncertainty analysis conducted by the Agency. The graph below (Figure
II-1) depicts the results of our analysis (including the uncertainty in
our land use change modeling) for grain sorghum ethanol produced in a
plant that uses natural gas and produces the current industry average
of 92% wet DG.
Lifecycle GHG emissions equivalent to the statutory gasoline fuel
baseline are represented on the graph by the zero on the X-axis. The
midpoint of the range of results is a 32% reduction in GHG emissions
compared to the 2005 gasoline baseline.\10\ As in the case of other
biofuel pathways analyzed as part of the March 2010 RFS2 final rule,
the range of results shown in Figure II-1 is based on our assessment of
uncertainty regarding the location and types of land that may be
impacted as well as the GHG impacts associated with these land use
changes (see Section II.B.1. for further information).
---------------------------------------------------------------------------
\10\ The 95% confidence interval around that midpoint results in
range of a 19% reduction to a 44% reduction compared to the 2005
gasoline fuel baseline.
[GRAPHIC] [TIFF OMITTED] TR17DE12.011
Table II-9 breaks down by stage the lifecycle GHG emissions for a
natural gas fired grain sorghum ethanol plant with 92% wet DG in 2022
and the statutory 2005 gasoline baseline.\11\ Results are included
using our mid-point estimate of land use change emissions, as well as
with the low and high end of the 95% confidence interval. Net
agricultural emissions include impacts related to changes in crop
inputs, such as fertilizer, energy used in agriculture, livestock
production and other agricultural changes in the scenarios modeled. The
fuel production stage includes emissions from ethanol production plants
including drying 8% of the DG. Fuel and feedstock transport includes
emissions from transporting bushels of harvested grain sorghum from the
farm to the ethanol production facility, as well as the emissions
associated with transporting ethanol from the production facility to
the fuel-blending facility.
---------------------------------------------------------------------------
\11\ Totals in the table may not sum due to rounding.
[[Page 74601]]
Table II-9--Lifecycle GHG Emissions for Grain Sorghum Ethanol Produced
in Dry Mill Plants That Use Natural Gas for Process Energy and Produce
92% Wet Distillers Grains
[gCO2e/mmBtu]
------------------------------------------------------------------------
Grain sorghum 2005 gasoline
Fuel type ethanol baseline
------------------------------------------------------------------------
Net Agriculture (w/o land use 12,698
change), Domestic and
International..................
Land Use Change, Mean (Low/ 27,620 (16,196/
High), Domestic and 41,903)
International..................
Fuel Production................. 22,111 19,200
Fuel and Feedstock Transport.... 3,661 *
Tailpipe Emissions.............. 880 79,004
---------------------------------------
Total Emissions, Mean (Low/ 66,971 (55,547/ 98,204
High)...................... 81,254)
Midpoint Lifecycle GHG Percent 32%
Reduction Compared to Petroleum
Baseline.......................
------------------------------------------------------------------------
* Emissions included in fuel production stage.
5. Results of Lifecycle Analysis for Ethanol From Grain Sorghum (Using
Biogas for Process Energy and On-Site Electricity Production)
The graph below (Figure II-2) depicts the results of our analysis
(including the uncertainty in our land use change modeling) for grain
sorghum ethanol produced in a dry mill plant that produces 0% wet DG
and uses biogas for process energy and for on-site production of all
electricity other than 0.15 kWh of grid electricity per gallon of
ethanol produced.
Figure II-2 shows the percent difference between lifecycle GHG
emissions for the 2005 petroleum gasoline fuel baseline and for 2022
grain sorghum ethanol produced in a plant that dries 100% of its DG,
uses only biogas as process energy and uses biogas to produce all
electricity used on site except for 0.15 kWh of grid electricity per
gallon of ethanol produced. Lifecycle GHG emissions equivalent to the
statutory gasoline fuel baseline are represented on the graph by the
zero on the X-axis. The midpoint of the range of results for this
sorghum ethanol plant configuration is a 52% reduction in GHG emissions
compared to the 2005 gasoline baseline.\12\ As in the case of other
biofuel pathways analyzed as part of the March 2010 RFS2 final rule,
the range of results shown in Figure II-2 is based on our assessment of
uncertainty regarding the location and types of land that may be
impacted as well as the GHG impacts associated with these land use
changes (see Section II.B.1). These results justify our determination
that sorghum ethanol produced in dry mill plants that dry any amount of
DG and use only biogas (from landfills, waste treatment plants and/or
waste digesters) for process energy and production of electricity used
on site, other than 0.15 kWh of electricity from the grid per gallon of
ethanol produced, meet the 50% lifecycle GHG reduction threshold
required for the generation of advanced renewable fuel RINs.
---------------------------------------------------------------------------
\12\ The 95% confidence interval around that midpoint results in
range of a 38% reduction to a 64% reduction compared to the 2005
gasoline fuel baseline.
---------------------------------------------------------------------------
[[Page 74602]]
[GRAPHIC] [TIFF OMITTED] TR17DE12.012
Table II-10 breaks down by stage the lifecycle GHG emissions for
grain sorghum ethanol in 2022 produced through this pathway and the
statutory 2005 gasoline baseline.\13\ Results are included using our
mid-point estimate of land use change emissions, as well as with the
low and high end of the 95% confidence interval. Net agricultural
emissions include impacts related to changes in crop inputs, such as
fertilizer, energy used in agriculture, livestock production and other
agricultural changes in the scenarios modeled. Emissions from fuel
production include emissions from ethanol production and drying 100% of
the DG. Fuel and feedstock transport includes emissions from
transporting bushels of harvested grain sorghum from the farm to
ethanol production facility, as well as the emissions associated with
transporting ethanol from the production facility to the fuel-blending
facility.
---------------------------------------------------------------------------
\13\ Totals in the table may not sum due to rounding.
Table II-10--Lifecycle GHG Emissions for Grain Sorghum Ethanol Produced
in Dry Mill Plants That Produce 0% Wet DG and Use Only Biogas (From
Landfills, Waste Treatment Plants, and/or Waste Digesters) for Process
Energy and Electricity Production, Except for 0.15 kWh of Electricity
From the Grid per Gallon of Ethanol Produced
[gCO2e/mmBtu]
------------------------------------------------------------------------
Grain sorghum 2005 gasoline
Fuel type ethanol baseline
------------------------------------------------------------------------
Net Agriculture (w/o land use 12,698 ..................
change), Domestic and
International..................
Land Use Change, Mean (Low/ 27,620 (16,196/ ..................
High), Domestic and 41,903)
International..................
[[Page 74603]]
Fuel Production................. 1,612 19,200
Fuel and Feedstock Transport.... 4,276 *
Tailpipe Emissions.............. 880 79,004
---------------------------------------
Total Emissions, Mean (Low/ 47,086 (35,662/ 98,204
High)...................... 61,369)
Midpoint Lifecycle GHG Percent 52%
Reduction Compared to Petroleum
Baseline.......................
------------------------------------------------------------------------
* Emissions included in fuel production stage.
6. Other Ethanol Processing Technologies
In the NODA we stated our intention to address other broadly
applicable ethanol production technologies that have the potential to
reduce lifecycle GHG emissions through a separate rulemaking. In the
NODA, we provided a brief description of the use of electricity that is
derived from renewable and non-carbon sources, such as wind power,
solar power, hydropower, biogas or biomass as power for process units
and equipment, and capturing and sequestering CO2 emissions
from an ethanol plant. We received comments supporting the use of
electricity that is derived from renewable and non-carbon sources as
power for process units and equipment. We also received comments
supporting the use of capturing and sequestering CO2
emissions as part of the RFS2 program. Due to the range of issues
before us, and the fact that these issues can pertain to more than just
the sorghum pathways, we intend to assess these technologies in a
separate action and will consider at that time the comments received in
response to the NODA and whether to broaden the number of grain sorghum
ethanol pathways that may qualify for RIN generation.
C. Consideration of Lifecycle Analysis Results
1. Implications for Threshold Determinations
As discussed above, EPA's analysis shows that, based on the mid-
point of the range of results, ethanol produced from grain sorghum
using biogas (from landfills, waste treatment plants and/or waste
digesters) for process heat and to produce all electricity used on-
site, other than 0.15 kWh of electricity from the grid per gallon of
ethanol produced at a dry mill plant drying any amount of DG would meet
the 50 percent GHG emissions reduction threshold needed to qualify as
an advanced biofuel (D-5 RINs). Grain sorghum ethanol meets the 20%
lifecycle GHG emissions reduction threshold for conventional biofuels
(D-6 RINs) when natural gas or biogas is used for process energy at a
dry mill plant, regardless of how much DG is dried. Therefore, Table 1
to Section 80.1426 is modified to add these new pathways. Table II-11
illustrates how these new pathways are included in the existing table.
Table II-11--Pathways and Applicable D Codes for Grain Sorghum Ethanol
----------------------------------------------------------------------------------------------------------------
Production process
Fuel type Feedstock requirements D-Code
----------------------------------------------------------------------------------------------------------------
Ethanol............................... Grain Sorghum............ Dry mill process using biogas 6
from landfills, waste
treatment plants, and waste
digesters, and/or natural
gas, for process energy.
Ethanol............................... Grain Sorghum............ Dry mill process, using only 5
biogas from landfills, waste
treatment plants, and waste
digesters for process energy
and for on-site production
of all electricity used at
the site other than up to
0.15 kWh of electricity from
the grid per gallon of
ethanol produced.
----------------------------------------------------------------------------------------------------------------
2. Consideration of Uncertainty
EPA's threshold determinations for grain sorghum ethanol are based
on the weight of evidence currently available. For this pathway, the
evidence considered includes the mid-point estimate as well as the
range of results based on statistical uncertainty and sensitivity
analyses conducted by the Agency. EPA has weighed all of the evidence,
while placing the greatest weight on the best-estimate value for the
scenarios analyzed.
As part of our assessment of the grain sorghum ethanol pathway, we
have identified key areas of uncertainty in our analysis. Although
there is uncertainty in all portions of the lifecycle modeling, we
focused our analysis on the factors that are the most uncertain and
have the biggest impact on the results. The indirect international
emissions are the component of our analysis with the highest level of
uncertainty. The type of land that is converted internationally and the
emissions associated with this land conversion are critical issues that
have a large impact on the GHG emissions estimates.
Our analysis of land use change GHG emissions includes an
assessment of uncertainty that focuses on two aspects of indirect land
use change--the types of land converted and the GHG emissions
associated with different types of land converted. These areas of
uncertainty were estimated statistically using the Monte Carlo analysis
methodology developed for the March,
[[Page 74604]]
2010 RFS2 final rule.\14\ Figure II-1 and Figure II-2 show the results
of our statistical uncertainty assessment.
---------------------------------------------------------------------------
\14\ The Monte Carlo analysis is described in EPA (2010a),
Section 2.4.4.2.8.
---------------------------------------------------------------------------
The docket for this final rule provides more details on all aspects
of our analysis of grain sorghum ethanol.
D. Other Comments Received
We received other comments that suggested that if we are to
calculate certain indirect emissions and costs of renewable fuels
(e.g., land use, and energy used for extraction), the same should be
included for petroleum fuels that are being displaced. These comments
were similar to comments we responded to in the March, 2010 final RFS
rule. Commenters did not provide any new information or data that would
cause us to re-evaluate our methodology that was described in more
detail in the March, 2010 RFS2 final rule. Therefore, we are not making
the suggested modifications to our lifecycle analysis at this time.
We also received comments regarding the situation where a facility
could be characterized under two or more separate pathways. For example
a facility co-processing different feedstocks, like corn and sorghum,
and using two different process energy sources simultaneously, like
natural gas and biogas with on-site electricity production. The
commenters asked if different RINs could be produced based on the
different pathways represented by the different feedstocks and process
energy sources used. In response, we note that 40 CFR Sec.
80.1426(f)(3)(i)-(vi) addresses a number of options for the generation
of RINs when renewable fuel production can be described by two or more
pathways. In situations not covered by the regulations, parties may
submit a petition to EPA pursuant to 80.1416.
E. Summary
Based on our GHG lifecycle analysis as discussed above, today's
rule includes two pathways for ethanol produced from grain sorghum
feedstocks. One pathway will allow the generation of D code 6 RINs for
grain sorghum ethanol produced by a natural gas or biogas fired dry
mill facility that dries any amount of DG. A second pathway will allow
producers of grain sorghum ethanol to generate advanced (D code 5) RINs
if they use only biogas for process energy and on-site electricity
production and use no more than 0.15 kWh of electricity from the grid
per gallon of ethanol produced. In both cases, of course, RINs may only
be generated if the fuel meets other definitional criteria for
renewable fuel (e.g., produced from renewable biomass as defined in the
March, 2010 RFS2 final rule regulations, and used to reduce or replace
the quantity of fossil fuel present in transportation fuel, heating oil
or jet fuel). In order to qualify for RIN generation, the fuel must
meet all other requirements specified in the Clean Air Act and the RFS
regulations at 40 CFR part 80 Subpart M. Parties that produce ethanol
through either pathway must do so in a matter that is consistent with
current regulations. Failure to do so may result in invalid RINs and
penalties.
III. Statutory and Executive Order Reviews
A. Executive Order 12866: Regulatory Planning and Review and Executive
Order 13563: Improving Regulation and Regulatory Review
This action is not a ``significant regulatory action'' under the
terms of Executive Order 12866 (58 FR 51735, October 4, 1993) and is
therefore not subject to review under Executive Orders 12866 and 13563
(76 FR 3821, January 21, 2011).
B. Paperwork Reduction Act
This action does not impose any new information collection burden.
The corrections, clarifications, and modifications to the March, 2010
RFS2 final regulations contained in this rule are within the scope of
the information collection requirements submitted to the Office of
Management and Budget (OMB) for the March, 2010 RFS2 final regulations.
OMB has approved the information collection requirements contained
in the existing regulations at 40 CFR part 80, subpart M under the
provisions of the Paperwork Reduction Act, 44 U.S.C. 3501 et seq. and
has assigned OMB control numbers 2060-0637 and 2060-0640. The OMB
control numbers for EPA's regulations in 40 CFR are listed in 40 CFR
part 9.
C. Regulatory Flexibility Act
The Regulatory Flexibility Act (RFA) generally requires an agency
to prepare a regulatory flexibility analysis of any rule subject to
notice and comment rulemaking requirements under the Administrative
Procedure Act or any other statute unless the agency certifies that the
rule will not have a significant economic impact on a substantial
number of small entities. Small entities include small businesses,
small organizations, and small governmental jurisdictions.
For purposes of assessing the impacts of today's rule on small
entities, small entity is defined as: (1) A small business as defined
by the Small Business Administration's (SBA) regulations at 13 CFR
121.201; (2) a small governmental jurisdiction that is a government of
a city, county, town, school district or special district with a
population of less than 50,000; and (3) a small organization that is
any not-for-profit enterprise which is independently owned and operated
and is not dominant in its field.
After considering the economic impacts of this action on small
entities, I certify that this rule will not have a significant economic
impact on a substantial number of small entities. This rule will not
impose any new requirements on small entities. Rather, we expect that
this rule may have a positive impact on entities that would now have
the opportunity to generate advanced RINs, where they may have been
unable to prior to this rule. The relatively minor corrections and
modifications this rule makes to the March, 2010 RFS2 final regulations
do not impact small entities.
D. Unfunded Mandates Reform Act
This rule does not contain a Federal mandate that may result in
expenditures of $100 million or more for State, local, and tribal
governments, in the aggregate, or the private sector in any one year.
We have determined that this action will not result in expenditures of
$100 million or more for the above parties and thus, this rule is not
subject to the requirements of sections 202 or 205 of UMRA.
This rule is also not subject to the requirements of section 203 of
UMRA because it contains no regulatory requirements that might
significantly or uniquely affect small governments. It only applies to
gasoline, diesel, and renewable fuel producers, importers, distributors
and marketers.
E. Executive Order 13132: Federalism
This action does not have federalism implications. It will not have
substantial direct effects on the States, on the relationship between
the national government and the States, or on the distribution of power
and responsibilities among the various levels of government, as
specified in Executive Order 13132. This action only applies to
gasoline, diesel, and renewable fuel producers, importers, distributors
and marketers. Thus, Executive Order 13132 does not apply to this
action.
[[Page 74605]]
F. Executive Order 13175: Consultation and Coordination With Indian
Tribal Governments
This rule does not have tribal implications, as specified in
Executive Order 13175 (65 FR 67249, November 9, 2000). It applies to
gasoline, diesel, and renewable fuel producers, importers, distributors
and marketers. This action does not impose any enforceable duties on
communities of Indian tribal governments. Thus, Executive Order 13175
does not apply to this action.
G. Executive Order 13045: Protection of Children From Environmental
Health Risks and Safety Risks
EPA interprets E.O. 13045 (62 FR 19885, April 23, 1997) as applying
only to those regulatory actions that concern health or safety risks,
such that the analysis required under section 5-501 of the E.O. has the
potential to influence the regulation. This action is not subject to
E.O. 13045 because it does not establish an environmental standard
intended to mitigate health or safety risks.
H. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use
``This action is not subject to Executive Order 13211 (66 FR 28355
(May 22, 2001)), because it is not a significant regulatory action
under Executive Order 12866.''
I. National Technology Transfer and Advancement Act
Section 12(d) of the National Technology Transfer and Advancement
Act of 1995 (``NTTAA''), Public Law 104-113, 12(d) (15 U.S.C. 272 note)
directs EPA to use voluntary consensus standards in its regulatory
activities unless to do so would be inconsistent with applicable law or
otherwise impractical. Voluntary consensus standards are technical
standards (e.g., materials specifications, test methods, sampling
procedures, and business practices) that are developed or adopted by
voluntary consensus standards bodies. NTTAA directs EPA to provide
Congress, through OMB, explanations when the Agency decides not to use
available and applicable voluntary consensus standards.
This action does not involve technical standards. Therefore, EPA
did not consider the use of any voluntary consensus standards.
J. Executive Order 12898: Federal Actions To Address Environmental
Justice in Minority Populations and Low-Income Populations
Executive Order (E.O.) 12898 (59 FR 7629 (Feb. 16, 1994))
establishes Federal executive policy on environmental justice. Its main
provision directs Federal agencies, to the greatest extent practicable
and permitted by law, to make environmental justice part of their
mission by identifying and addressing, as appropriate,
disproportionately high and adverse human health or environmental
effects of their programs, policies, and activities on minority
populations and low-income populations in the United States.
EPA has determined that this rule will not have disproportionately
high and adverse human health or environmental effects on minority or
low-income populations because it does not affect the level of
protection provided to human health or the environment. These
amendments would not relax the control measures on sources regulated by
the RFS regulations and therefore would not cause emissions increases
from these sources.
K. Congressional Review Act
The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the
Small Business Regulatory Enforcement Fairness Act of 1996, generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report, which includes a copy of the rule,
to each House of the Congress and to the Comptroller General of the
United States. A major rule cannot take effect until 60 days after it
is published in the Federal Register. EPA will submit a report
containing this rule and other required information to the U.S. Senate,
the U.S. House of Representatives, and the Comptroller General of the
United States prior to publication of the rule the Federal Register.
This action is not a ``major rule'' as defined by 5 U.S.C. 804(2).
IV. Statutory Provisions and Legal Authority
Statutory authority for the rule finalized today can be found in
section 211 of the Clean Air Act, 42 U.S.C. 7545. Additional support
for today's rule comes from Section 301(a) of the Clean Air Act, 42
U.S.C. 7414, 7542, and 7601(a).
List of Subjects in 40 CFR Part 80
Environmental protection, Administrative practice and procedure,
Agriculture, Air pollution control, Confidential business information,
Diesel fuel, Energy, Forest and forest products, Fuel additives,
Gasoline, Imports, Labeling, Motor vehicle pollution, Penalties,
Petroleum, Reporting and recordkeeping requirements.
Dated: November 30, 2012.
Lisa P. Jackson,
Administrator.
For the reasons set forth in the preamble, 40 CFR part 80 is
amended as follows:
PART 80--REGULATION OF FUELS AND FUEL ADDITIVES
0
1. The authority citation for part 80 continues to read as follows:
Authority: 42 U.S.C. 7414, 7521(1), 7545 and 7601(a).
0
2. Section 80.1426 (f)(1) is amended by adding two new entries in Table
1 for ``Ethanol'' to the end of the table and adding paragraph (f)(13)
to read as follows:
Sec. 80.1426 How are RINs generated and assigned to batches of
renewable fuel by renewable fuel producers or importers?
* * * * *
(f) * * *
Table 1 to Sec. 80.1426--Applicable D Codes for Each Fuel Pathway for Use in Generating RINs
----------------------------------------------------------------------------------------------------------------
Production process
Fuel type Feedstock requirements D Code
----------------------------------------------------------------------------------------------------------------
* * * * * * *
Ethanol............................... Grain Sorghum............ Dry mill process using biogas 6
from landfills, waste
treatment plants, and/or
waste digesters, and/or
natural gas, for process
energy.
[[Page 74606]]
Ethanol............................... Grain Sorghum............ Dry mill process, using only 5
biogas from landfills, waste
treatment plants, and/or
waste digesters for process
energy and for on-site
production of all
electricity used at the site
other than up to 0.15 kWh of
electricity from the grid
per gallon of ethanol
produced, calculated on a
per batch basis.
----------------------------------------------------------------------------------------------------------------
* * * * *
(13) In order for facilities to satisfy the requirements of the
advanced biofuel grain sorghum pathway all of the following conditions
(in addition to other applicable requirements) apply.
(i) The quantity of electricity used at the site that is purchased
from the grid must be measured and recorded by continuous metering.
(ii) All electricity used on-site that is not purchased from the
grid must be produced on-site from biogas from landfills, waste
treatment plants, and/or waste digesters.
(iii) For biogas directly transported to the facility without being
placed in a commercial distribution system, all of the following
conditions must be met:
(A) The producer has entered into a written contract for the
procurement of biogas that specifies the volume of biogas, its heat
content, and that the biogas must be derived from a landfill, waste
treatment plant and/or waste digester.
(B) The volume of biogas was sold to the renewable fuel production
facility, and to no other facility.
(C) The volume and heat content of biogas injected into the
pipeline and the volume of gas used at the renewable fuel production
facility are measured by continuous metering.
(iv) Reserved
(v) For biogas that has been gathered, processed and injected into
a common carrier pipeline, all of the following conditions must be met:
(A) The producer has entered into a written contract for the
procurement of biogas that specifies a specific volume of biogas, with
a specific heat content, and that the biogas must be derived from a
landfill, waste treatment plant and/or waste digester.
(B) The volume of biogas was sold to the renewable fuel production
facility, and to no other facility.
(C) The volume of biogas that is withdrawn from the pipeline is
withdrawn in a manner and at a time consistent with the transport of
fuel between the injection and withdrawal points.
(D) The volume and heat content of biogas injected into the
pipeline and the volume of gas used at the renewable fuel production
facility are measured by continuous metering.
(E) The common carrier pipeline into which the biogas is placed
ultimately serves the producer's renewable fuel facility.
(vi) No party relied upon the contracted volume of biogas for the
creation of RINs.
* * * * *
0
3. Section 80.1450 is amended by adding paragraph (b)(1)(ix) to read as
follows:
Sec. 80.1450 What are the registration requirements under the RFS
program?
* * * * *
(b) * * *
(1) * * *
(ix)(A) For a producer of ethanol from grain sorghum or a foreign
ethanol producer making product from grain sorghum and seeking to have
it sold as renewable fuel after addition of denaturant, provide a plan
that has been submitted and accepted by U.S. EPA that includes the
following information:
(1) Locations from which the biogas used at the facility was
produced or extracted.
(2) Name of suppliers of all biogas used at the facility.
(3) An affidavit from each biogas supplier stating its intent to
supply biogas to the renewable fuel producer or foreign ethanol
producer, the quantity and energy content of the biogas that it intends
to provide to the renewable fuel producer or foreign ethanol producer,
and that the biogas will be derived solely from landfills, waste
treatment plants, and/or waste digesters.
(4) If the producer intends to generate advanced biofuel RINs,
estimates of the total amount of electricity used from the grid, the
total amount of ethanol produced, and a calculation of the amount of
electricity used from the grid per gallon of ethanol produced.
(5) If the producer intends to generate advanced biofuel RINs, a
description of how the facility intends to demonstrate and document
that not more than 0.15 kWh of grid electricity is used per gallon of
ethanol produced, calculated on a per batch basis, at the time of RIN
generation.
(B) [Reserved]
* * * * *
0
4. Section 80.1451 is amended by redesignating paragraph (b)(1)(ii)(S)
as (b)(1)(ii)(T) and adding a new paragraph (b)(1)(ii)(S) to read as
follows:
Sec. 80.1451 What are the reporting requirements under the RFS
program?
* * * * *
(b) * * *
(1) * * *
(ii) * * *
(S) Producers of advanced biofuel using grain sorghum shall report
all of the following:
(1) The total amount of electricity that is purchased from the grid
and used at the site, based on metering, in kWh.
(2) Total amount of ethanol produced.
(3) Calculation of the amount of grid electricity used at the site
per gallon of ethanol produced in each batch.
(4) Each batch number as specified in Sec. 80.1452(b).
(5) Reference ID for documents required by Sec. 80.1454(k)(2)(D).
* * * * *
0
5. Section 80.1454(k) is revised to read as follows:
Sec. 80.1454 What are the recordkeeping requirements under the RFS
program?
* * * * *
(k)(1) biogas and electricity in pathways involving feedstocks
other than grain sorghum. A renewable fuel producer that generates RINs
for biogas or electricity produced from renewable biomass (renewable
electricity) for fuels that are used for transportation pursuant to
Sec. 80.1426(f)(1) and (11), or that uses process heat from biogas to
generate RINs for renewable fuel pursuant to Sec. 80.1426(f)(12) shall
keep all of the following additional records:
(i) Contracts and documents memorializing the sale of biogas or
renewable electricity for use as transportation fuel relied upon in
Sec. 80.1426(f)(10), Sec. 80.1426(f)(11), or for use of biogas for
use as process heat to make renewable fuel as relied upon in Sec.
80.1426(f)(12), and the transfer of title of the biogas or renewable
electricity
[[Page 74607]]
and all associated environmental attributes from the point of
generation to the facility which sells or uses the fuel for
transportation purposes.
(ii) Documents demonstrating the volume and energy content of
biogas, or kilowatts of renewable electricity, relied upon under Sec.
80.1426(f)(10) that was delivered to the facility which sells or uses
the fuel for transportation purposes.
(iii) Documents demonstrating the volume and energy content of
biogas, or kilowatts of renewable electricity, relied upon under Sec.
80.1426(f)(11), or biogas relied upon under Sec. 80.1426(f)(12), that
was placed into the common carrier pipeline (for biogas) or
transmission line (for renewable electricity).
(iv) Documents demonstrating the volume and energy content of
biogas, or kilowatts of renewable electricity, relied upon under Sec.
80.1426(f)(12) at the point of distribution.
(v) Affidavits from the biogas or renewable electricity producer
and all parties that held title to the biogas or renewable electricity
confirming that title and environmental attributes of the biogas or
renewable electricity relied upon under Sec. 80.1426(f)(10) and
(11) were used for transportation purposes only, and that the
environmental attributes of the biogas relied upon under Sec.
80.1426(f)(12) were used for process heat at the renewable fuel
producer's facility, and for no other purpose. The renewable fuel
producer shall create and/or obtain these affidavits at least once per
calendar quarter.
(vi) The biogas or renewable electricity producer's Compliance
Certification required under Title V of the Clean Air Act.
(vii) The biogas or renewable electricity producer's Compliance
Certification required under Title V of the Clean Air Act.
(viii) Such other records as may be requested by the Administrator.
(2) Biogas and electricity in pathways involving grain sorghum as
feedstock.
(i) Contracts and documents memorializing the purchase and sale of
biogas and the transfer of biogas from the point of generation to the
ethanol production facility.
(ii) If the advanced biofuel pathway is used, documents
demonstrating the total kilowatt-hours (kWh) of electricity used from
the grid, and the total kWh of grid electricity used on a per gallon of
ethanol basis, pursuant to Sec. 80.1426(f)(13).
(iii) Affidavits from the producer of biogas used at the facility,
and all parties that held title to the biogas, confirming that title
and environmental attributes of the biogas relied upon under Sec.
80.1426(f)(13) were used for producing ethanol at the renewable fuel
production facility and for no other purpose. The renewable fuel
producer shall obtain these affidavits at least once per calendar
quarter.
(iv) The biogas producer's Compliance Certification required under
Title V of the Clean Air Act.
(v) Such other records as may be requested by the Administrator.
* * * * *
[FR Doc. 2012-30100 Filed 12-14-12; 8:45 am]
BILLING CODE P