[Federal Register Volume 78, Number 36 (Friday, February 22, 2013)]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-04142]
ENVIRONMENTAL PROTECTION AGENCY
Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2011
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of document availability and request for comments.
SUMMARY: The Draft Inventory of U.S. Greenhouse Gas Emissions and
Sinks: 1990-2011 is available for public review. Annual U.S. emissions
for the period of time from 1990 through 2011 are summarized and
presented by source category and sector. The inventory contains
estimates of carbon dioxide (CO2), methane (CH4),
nitrous oxide (N2O), hydrofluorocarbons (HFC),
perfluorocarbons (PFC), and sulfur hexafluoride (SF6)
emissions. The inventory also includes estimates of carbon fluxes in
U.S. agricultural and forest lands. The technical approach used in this
report to estimate emissions and sinks for greenhouse gases is
consistent with the methodologies recommended by the Intergovernmental
Panel on Climate Change (IPCC), and reported in a format consistent
with the United Nations Framework Convention on Climate Change (UNFCCC)
reporting guidelines. The Inventory of U.S. Greenhouse Gas Emissions
and Sinks: 1990-2011 is the latest in a series of annual U.S.
submissions to the Secretariat of the UNFCCC.
DATES: To ensure your comments are considered for the final version of
the document, please submit your comments within 30 days of the
appearance of this notice. However, comments received after that date
will still be welcomed and be considered for the next edition of this
ADDRESSES: Comments should be submitted to Mr. Leif Hockstad at:
Environmental Protection Agency, Climate Change Division (6207J), 1200
Pennsylvania Ave., NW., Washington, DC 20460, Fax: (202) 343-2359. You
are welcome and encouraged to send an email with your comments to
FOR FURTHER INFORMATION CONTACT: Mr. Leif Hockstad, Environmental
Protection Agency, Office of Air and Radiation, Office of Atmospheric
Programs, Climate Change Division, (202) 343-9432,
SUPPLEMENTARY INFORMATION: For this year's public review, EPA is
calling attention to two specific areas where interested stakeholders
could provide feedback to improve the quality of the emission
estimates. First, EPA is seeking comments on approaches for using
facility-level data reported under EPA's Greenhouse Gas Reporting
Program (GHGRP), particularly data from reporters that began reporting
in 2011. For selected source categories, EPA could use data elements
reported under the GHGRP, such as facility-level data that can be
aggregated at the national level, to derive country-specific emission
factors for use in estimating industrial process emissions. Categories
with GHGRP-related updates under consideration include nitric acid,
petrochemical production, phosphoric acid, titanium dioxide, lime
production, and several fluorinated gas categories. Interested
stakeholders should review detailed methodological approaches in
Chapter 4 (Industrial Processes) of the report. Depending on
stakeholder feedback, EPA may include revised estimates in the final
published inventory report that use these emission factors derived from
the specified GHGRP data elements.
The second area is the natural gas sector, which in recent years
has experienced significant growth and changes in industry practices.
EPA recently solicited and received new information and data related to
emissions estimates for the oil and gas industry through a variety of
mechanisms, including the formal public notice and comment process of
the oil and gas New Source Performance Standards (NSPS) to control
VOCs, a stakeholder workshop on the natural gas sector emissions
estimates, and data submitted under the GHGRP. In developing the draft
inventory report for this public comment period, EPA carefully
evaluated relevant information, and has made updates to two key
sources: liquids unloading, and completions with hydraulic fracturing
and refracturing. EPA also made additional changes to the report to
allow for more transparency. EPA seeks feedback on these updates, and
on incorporation of GHGRP data, and requests recommendations for
improving the overall quality of the inventory report to be finalized
in April 2013, as well as subsequent Inventory reports.
The draft report can be obtained by visiting the U.S. EPA's Climate
Change Site at: http://www.epa.gov/climatechange/ghgemissions/usinventoryreport.html.
Dated: February 14, 2013.
Assistant Administrator, Office of Air and Radiation.
[FR Doc. 2013-04142 Filed 2-21-13; 8:45 am]
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