2011 Emissions Modeling Platform; Availability
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ENVIRONMENTAL PROTECTION AGENCY
Notice of Availability of the Environmental Protection Agency's 2011 Emissions Modeling Platform
Environmental Protection Agency (EPA).
Notice of data availability (NODA).
The Environmental Protection Agency (EPA) is providing notice that the 2011 Emissions Modeling Platform data are available for public review and comment. The 2011 Emissions Modeling Platform consists of emissions inventory data, supporting data, and methods that are used to process the 2011 National Emissions Inventory (NEI) and related data into a form that can be used for air quality modeling. The platform, or portions of the data that make up the platform, may be used by the Office of Air and Radiation in several contexts, including the development of rules related to the transport of air pollution and the National Ambient Air Quality Standards. The platform may also be used for other studies such as the National Air Toxics Assessment. The EPA is requesting comment on the 2011 Emissions Modeling Platform, including the emissions inventories and on the supporting data and methods. A docket has been established to track the comments.
Comments must be received on or before March 31, 2014. Please refer to SUPPLEMENTARY INFORMATION for additional information on submitting comments and on the provided data.
Submit your comments, identified by Docket ID No. EPA-HQ-OAR-2013-0743, by one of the following methods:
Instructions: Direct your comments to Docket ID No. EPA-HQ-OAR-2013-0743. The EPA's policy is that all comments received will be included in the public docket without change and may be made available online at , including any personal information provided, unless the comment includes information claimed to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through or email. The Web site is an “anonymous access” system, which means the EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an email comment directly to the EPA without going through , your email address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the Internet. If you submit an electronic comment, the EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD-ROM you submit. If the EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, the EPA may not be able to consider your comment. Electronic files should avoid the use of special characters, any form of encryption, and be free of any defects or viruses. For additional information about the EPA's public docket, visit the EPA Docket Center homepage at .
Docket: All documents in the docket are listed in the 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 or in hard copy at the Air and Radiation Docket and Information Center, EPA/DC, WJC West Building Room 3334, 1301 Constitution Ave. NW., Washington, DC. 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
For questions on the 2011 platform and on how to submit comments, contact Alison Eyth, Air Quality Assessment Division, Environmental Protection Agency, C339-02, 109 T.W. Alexander Drive, Research Triangle Park, NC 27709; telephone number: (919)541-2478; fax number: (919) 541-0684; email address: .
The EPA is requesting comment on the 2011 platform emission inventories; supporting ancillary files used to allocate emissions temporally, spatially, and by species; and on the emissions modeling methods used to process the inventories into data suitable for input to air quality models. Summaries of the emission inventories and data are provided to aid in the review of the data, but comments are sought on the actual data.
I. Additional Information on Submitting Comments
A. What should I consider as I prepare my comments for EPA?
1. Submitting CBI. Do not submit this information to the EPA through EDOCKET, , or email. Clearly mark the part or all of the information that you claim to be CBI. For CBI information in a disk or CD-ROM that you mail to the EPA docket office specified in the Instructions, mark the outside of the disk or CD-ROM as CBI and then identify electronically within the disk or CD-ROM the specific information that is claimed as CBI. In addition to one complete version of the comment that includes information claimed as CBI, a copy of the comment that does not contain the information claimed as CBI must be submitted for inclusion in the public docket. Information so marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2.
2. Tips for preparing your comments. When submitting comments, remember to:
i. Identify the notification by docket number and other identifying information (subject heading, Federal Register date and page number).
ii. Explain your comments, why you agree or disagree; suggest alternatives and substitute data that reflects your requested changes.
iii. Describe any assumptions and provide any technical information and/or data that you used.
iv. Provide specific examples to illustrate your concerns, and suggest alternatives.
v. Explain your views as clearly as possible, avoiding the use of profanity or personal threats.
vi. Make sure to submit your comments by the comment period deadline identified.
B. Instructions for Agencies That Submit Data to the NEI
1. Updates to the 2011 NEI. State, local, and tribal agencies that submit data to the NEI via the Emissions Inventory System (EIS) are encouraged to submit any updates to the 2011 emission inventory data through EIS as described in . Updates to emission inventories, and to model inputs used to develop mobile source emission inventories in the NEI, should be submitted through EIS even in cases in which the 2011 modeling platform inventory data does not exactly match the NEI data. Specific examples of non-matching data are given in Section II. The EPA requests that agencies submitting updates via EIS also submit to the docket a comment that describes the nature of, and rationale for, the changes that were made in EIS to aid in the documentation of changes to the inventories. These agencies do not need to submit to the docket the actual updated emission inventory data or model inputs already provided to EIS.
2. Updates to Other Data. EIS can accept updates to some of the categories of data for which EPA is requesting comments, but not for all of the data that exists in the modeling platform. The types of data that can be updated through EIS are noted below. Updates to all other modeling platform data and comments on the methods used must be provided through the docket. Additional details follow in Section I.C.
C. Instructions for Comments Not Submitted Through EIS
The EPA can most effectively incorporate comments that provide specific alternative values to those in the EPA data sets, and for which accompanying documentation supports the alternative values. Commenters should provide the alternative data at a level of detail appropriate to the data set into which it will be incorporated, thereby including all key fields needed to substitute the old data with the new. For example, commenters should not provide a new set of county total emissions as an alternative to more detailed point source emissions data.
Any alternative emission inventory or other data provided should be compatible with the formats used by the Sparse Matrix Operator Kernel Emissions (SMOKE) modeling system version 3.5, which is used by the EPA to process emission inventories into a format that can be used for air quality modeling. Formats are defined in the SMOKE Version 3.5 User's Manual available from . Only the rows of data that have changed from those provided by the EPA should be included in the alternative data sets.
II. Information Available for Public Comment
The 2011 Emissions Modeling Platform consists of emission inventories primarily based on the 2011 NEI version 1, additional ancillary data files that are used to convert the NEI emissions into a form that can be used for air quality modeling, along with the methods used to prepare the air quality model inputs. The NEI represents emissions of criteria and hazardous pollutants into the atmosphere from all source categories within the United States. 2011 is the latest year for which a complete NEI for all emission processes is available. These complete, national emission inventories are prepared every three years and are primarily based on data and inputs provided by state, local, and tribal agencies for sources within their jurisdictions. The NEI includes emissions from sources at specific locations called point sources, emissions from fire events, and county-level emissions of onroad mobile sources, nonroad mobile sources, and other nonpoint sources.
The 2011 emissions modeling platform is named for the year of the data that it represents. The emission inventories in the modeling platform are primarily based on the 2011 NEI version 1, although there are some key differences between the platform inventories and the NEI. First, in the modeling platform, the NEI inventories are split into additional categories called modeling sectors. For example, the point sources are split into peaking electric generating units (EGUs), other EGUs, oil and gas sources, and other point sources. The nonpoint sources are split into agricultural ammonia sources, residential wood sources, oil and gas sources, and other nonpoint sources. Other differences between the platform inventories and the NEI are in the emission values for commercial marine vessel emissions in specific areas, in the mobile source emissions in California and Texas, and the inclusion of additional ethanol plants in the modeling platform. Another difference is in the onroad mobile source emissions inventory values due to the use of different versions of the Motor Vehicle Emissions Simulator (MOVES) in the two data sets.
The 2011 emissions modeling platform also includes emissions inventories for Canada and Mexico, along with ancillary data files used to allocate annual emissions to the hourly, gridded emissions of chemical species used by an air quality model (AQM). The types of ancillary data files include temporal profiles that allocate annual and monthly emissions down to days and hours, spatial surrogates that allocate county-level emissions onto the grid cells used by an AQM, and speciation profiles that allocate the pollutants in the NEI to the chemical species used by an AQM. In addition, there are temporal, spatial, and speciation cross-reference files that map the emission sources in the emission inventories to the appropriate profiles based on their location, emissions source classification code (SCC), and in some cases the specific facility or unit.
The 2011 emissions modeling platform, or portions of the data that make up the platform, may be used by the Office of Air and Radiation in several contexts including the development of rules related to the transport of air pollution and the National Ambient Air Quality Standards. Air quality modeling results that are based on the outputs of the emissions modeling platform are typically used in support of Regulatory Impact Analyses (RIAs) and sometimes support other aspects of rulemaking. The platform may also be used for other studies such as the National Air Toxics Assessment.
The EPA has placed key information related to the 2011 emissions modeling platform into the electronic docket available at . However, many of the detailed data files are too large to be directly uploaded into the electronic docket and/or are not in formats accepted by that docket. Therefore, the information placed in the electronic docket, associated detailed data, and summaries to help with interpretation of the data are available for public review on the CHIEF Emissions Modeling Clearinghouse on EPA's Web site at . Supplementary custom and prepared summaries and extractions of the 2011 NEI, and documentation thereof, are also available on EPA's Web site at .
The emissions inventories, along with many of the ancillary files, are provided in the form of flat files that can be input to SMOKE. Flat files are comma-separated value style text files with columns and rows that can be loaded into spreadsheet or database software. The columns of interest in the emission inventory files are specified in each subsection below. The EPA requests comment on the following components of the 2011 emissions modeling platform data:
To aid in the interpretation of the provided data files and how they relate to the aspects of the data on which the EPA is requesting comment, the EPA has provided in the docket a document describing the information included in the provided data files.
Dated: November 20, 2013.
Acting Director, Office of Air Quality Planning and Standards.
[FR Doc. 2013-28508 Filed 11-26-13; 8:45 am]
BILLING CODE 6560-50-P
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Comment Period Closed
Mar 31 2014, at 11:59 PM ET
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Date Posted: Nov 27, 2013
Federal Register Number: 2013-28508
Docket ID No. EPA-HQ-OAR-2013-0743 Notice of Data Availability of the Environmental Protection Agency’s 2011 Emissions Modeling Platform Federal Register...
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