Using e-GGRT to Prepare Your Subpart A Report

Subpart A stipulates each facility or supplier is required to supply some basic facility or supplier level information for each reporting year, including the entering and reporting of relevant North American Industry Classification System (NAICS) codes and the entering and reporting of all highest-level United States parent companies.

This page provides an overview of subtopics that are central to Subpart A reporting:

The end of the page contains links you can use for more information on these topics.

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Subpart A NAICS Codes

For each NAICS code, Subpart A requires you to report the following data (see §98.3(c)(10)):

  • NAICS Code
  • The code's relevance to revenue producing activity. Choose Primary, Second Primary or Additional.

Subpart A U.S. Parent Companies

For each of the highest-level U.S. parent company(s), Subpart A requires you to report the following data (see §98.3(c)(11)):

  • Parent company name
  • Percentage of ownership
  • Parent company address

For information on how to format parent company name(s), refer to the Standardization of Parent Company Names - Style Guide.

Subpart A Additional Summary Information for this Facility or Supplier

Dates and Changes

Subpart A requires you to report the following data about your facility or supplier:

  • The start date and end date for the information contained in the GHG report (see §98.3(c)(2)).
  • A written explanation of any calculation methodology changes during the reporting year, including an explanation of why a change in methodology was required (see §98.3(c)(6) and §98.3(c)(e)), if applicable.

Best Available Monitoring Method (BAMM)

Subpart A requires a brief description of each "best available monitoring method" used, the parameter measured using this method, and the time period during which the best available monitoring method was used (see §98.3(c)(7)), if applicable. Please note that consistent with the final rule containing Confidentiality Determinations published in the Federal Register on May 26, 2011, and the accompanying memorandum titled, “Final Data Category Assignments and Confidentiality Determinations for Part 98 Reporting Elements,” the information reported under 98.3(c)(7) has been determined to be either emissions data, and therefore available to the public, or not eligible for confidential treatment, and thus available to the public.

Please note: Only facilities or suppliers that have been approved by EPA to use BAMM or have automatically been granted BAMM under the rule should report the information described above. If your facility does not fall into one of these categories, you should not enter data in the BAMM fields.

Other Fields

A response of Yes or No answering the question "Do reported emissions include emissions from a cogeneration unit?" (see §98.3(c)(4)). If you are only reporting as a supplier listed in Table A-5 you should select "Not applicable because I am a supplier".

A response of Yes or No answering the question "Does your facility report under subpart C or D and have a plant code (as defined in §98.6)? A plant code is the Plant ID code assigned by the Department of Energy's (DOE) Energy Information Administration (EIA) and may also be referred to as the "ORIS code", "ORISPL code", "Facility ID", or "Facility code", among other names.  If a Plant ID code has not been assigned by DOE's EIA, then plant code means a code beginning with "88" assigned by EPA's Clean Air Markets Division (CAMD) for electronic reporting.

For the 2010 reporting year only, if your facility is reporting emissions from part 75 units (i.e., units that are subject to Subpart D and/or units that use the methods in 40 CFR 75 to quantify mass emissions in accordance with 98.33(a)(5)), please indicate if you separately calculate biogenic CO2 emissions from these part 75 units (see §98.3(c)(12)). For reporting years 2011 and after this data element is not presented and thus is not required.

Subpart A Validation Report

The Validation Report assists you with determining the completeness and quality of your reported data.

We strongly encourage you to use the Validation Report to check your work. The Validation Report performs two types of checks:

  • Data Completeness: Data required for reporting that are missing or incomplete.
  • Data Quality: Data that are outside of the expected range of values.

Certain validation checks which are considered to represent critical errors must be corrected before you can successfully generate and submit your Annual Report. These checks are signified with a stop sign . If you feel that you have triggered one of these critical “stop signs” checks in error, or if there’s a reason why your report should be submitted despite the check being triggered, please submit a request to the e-GGRT Help Desk at

You may view the Validation Report at any time.

Note that the Validation Report is intended to assist users in entering data, but it is not an indication that the reporter has entered all necessary information, nor is it an indication that the reporter is in compliance with part 98. Furthermore, a negative finding on the validation report is not a guarantee that a data element was entered incorrectly. For more detail on the Validation Report and its functionality please review the Subpart Validation Report page.

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See Also

Screen Errors
Using e-GGRT to Prepare Your Subpart A Report
Subpart A NAICS Codes
Subpart A U.S. Parent Companies
Subpart A Additional Summary Information for this Facility
Subpart Validation Report

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