EPA Administrator Lisa P. Jackson signed the following document on 

August 3, 2012, and EPA is submitting it for publication in the 

Federal Register (FR). While we have taken steps to ensure the 

accuracy of this Internet version of the document, it is not the 

official version. Please refer to the official version in a 

forthcoming FR publication, which will appear on the Government 

Printing Office's FDSys website 

(http://fdsys.gpo.gov/fdsys/search/home.action). {It will also appear 

on Regulations.gov (http://www.regulations.gov) in Docket No. EPA-HQOAR-2011-0147}.

6560-50-P

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 98

[EPA-HQ-OAR-2011-0147; FRL-]

RIN 2060-AR53

2012 Technical Corrections, Clarifying and Other Amendments to 

the Greenhouse Gas Reporting Rule, and Confidentiality 

Determinations for Certain Data Elements of the Fluorinated Gas 

Source Category 

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

SUMMARY: The EPA is amending specific provisions of the 

Greenhouse Gas Reporting Rule to provide greater clarity and 

flexibility to facilities subject to reporting emissions from 

the industrial waste landfill, petroleum and natural gas 

systems, fluorinated gas production, and electronics 

manufacturing source categories. These source categories will 

report greenhouse gas data for the first time in September 2012. 

The changes do not significantly change the overall calculation 

and monitoring requirements of the Greenhouse Gas Reporting Rule 

or add additional requirements for reporters. The EPA is also 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

making confidentiality determinations for four new data elements 

for the fluorinated gas production source category of the 

Greenhouse Gas Reporting Rule. Lastly, we are finalizing an 

amendment to the general provisions to defer the reporting 

deadline for a data element used as an input to an emission 

equation in the fluorinated gas production source category until 

2015. 

DATES: This final rule is effective on [INSERT THE DATE OF 

PUBLICATION OF THIS FINAL RULE IN THE FEDERAL REGISTER], except 

for the amendments to 98.3(c)(4) (the subpart A amendments that 

affect subpart I) and the confidentiality determinations for 

subpart L, which are effective on [INSERT THE DATE 30 DAYS AFTER 

PUBLICATION OF THIS FINAL RULE IN THE FEDERAL REGISTER]. 

ADDRESSES: The EPA has established a docket for this action 

under Docket ID No. EPA-HQ-OAR-2011-0147. All documents in the 

docket are listed in the http://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, is not placed on the Internet and is 

publicly available only in hard copy. Publicly available docket 

materials are available either electronically in 

http://www.regulations.gov or in hard copy at the Air Docket, 

EPA/DC, EPA West Building, Room 3334, 1301 Constitution Ave., 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

NW., Washington, DC. This Docket Facility 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: Carole Cook, Climate Change 

Division, Office of Atmospheric Programs (MC-6207J), 

Environmental Protection Agency, 1200 Pennsylvania Ave., NW, 

Washington, DC 20460; telephone number: (202) 343-9263; fax 

number: (202) 343-2342; e-mail address: 

GHGReportingRule@epa.gov. For technical information and 

implementation materials, please go to the Greenhouse Gas 

Reporting Rule Program website at 

http://www.epa.gov/climatechange/emissions/ghgrulemaking.html. 

To submit a question, select Rule Help Center, followed by 

“Contact Us.” 

Worldwide Web (WWW). In addition to being available in the 

docket, an electronic copy of this final rule will also be 

available through the WWW. Following the Administrator's 

signature, a copy of this action will be posted on the EPA's 

Greenhouse Gas Reporting Program website at 

http://www.epa.gov/climatechange/emissions/ghgrulemaking.html.

SUPPLEMENTARY INFORMATION:
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

Regulated Entities. The Administrator determined that this 

action is subject to the provisions of Clean Air Act (CAA) 

section 307(d). See CAA section 307(d)(1)(V) (the provisions of 

section 307(d) apply to “such other actions as the Administrator 

may determine”). These amended regulations could affect owners 

or operators of direct emitters of GHGs. Regulated categories 

and affected entities may include those listed in Table 1 of 

this preamble:

Table 1. Examples of Affected Entities by Category

Category NAICS Examples of affected facilities

Petroleum and 

Natural Gas Systems

486210 Pipeline transportation of natural gas.

221210 Natural gas distribution facilities.

211 Extractors of crude petroleum and natural 

gas.

211112 Natural gas liquid extraction facilities.

Electronics 

Manufacturing

334111 Microcomputers manufacturing 

facilities.

334413 Semiconductor, photovoltaic (solidstate) device manufacturing

facilities.

334419 LCD unit screens manufacturing 

facilities.

334419 MEMS manufacturing facilities.

Fluorinated Gas 

Production

325120 Industrial gases manufacturing 

facilities.

Industrial Waste 

Landfills

562212 Solid waste landfills.

322110 Pulp mills.

322121 Paper mills.

322122 Newsprint mills.

322130 Paperboard mills.

311611 Meat processing facilities.

311411 Frozen fruit, juice, and vegetable 

manufacturing facilities.

311421 Fruit and vegetable canning facilities.

221320 Sewage treatment facilities.

Table 1 of this preamble is not intended to be exhaustive, 

but rather lists the types of facilities that the EPA is now 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

aware could be potentially affected by the reporting 

requirements. Other types of facilities not listed in the table 

could also be affected. To determine whether you are affected by 

this action, you should carefully examine the applicability 

criteria found in 40 CFR part 98, subpart A or the relevant 

criteria in the sections related to direct emitters of GHGs. If 

you have questions regarding the applicability of this action to 

a particular facility, consult the person listed in the 

preceding FOR FURTHER INFORMATION CONTACT section.

What is the effective date? This final rule is effective on 

[INSERT THE DATE OF PUBLICATION OF THIS FINAL RULE IN THE 

FEDERAL REGISTER], except for the amendments to 98.3(c)(4) (the 

subpart A amendments that affect subpart I) and the 

confidentiality determinations for subpart L, which are 

effective on [INSERT THE DATE 30 DAYS AFTER PUBLICATION OF THIS 

FINAL RULE IN THE FEDERAL REGISTER]. Section 553(d) of the 

Administrative Procedure Act (APA), 5 U.S.C. Chapter 5, 

generally provides that rules may not take effect earlier than 

30 days after they are published in the Federal Register. EPA 

is issuing this final rule under section 307(d)(1) of the Clean 

Air Act, which states: ‘‘The provisions of section 553 through 

557 * * * of Title 5 shall not, except as expressly provided in 

this section, apply to actions to which this subsection 

applies.’’ Thus, section 553(d) of the APA does not apply to 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

this rule. EPA is nevertheless acting consistently with the 

purposes underlying APA section 553(d) in making the final rule 

provisions, except for the amendments to 98.3(c)(4) (the subpart 

A amendments that affect subpart I) and the subpart L 

confidentiality determinations, effective on [INSERT THE DATE OF 

PUBLICATION OF THIS FINAL RULE IN THE FEDERAL REGISTER]. This 

final rule, except for the amendments to 98.3(c)(4) (the subpart 

A amendments that affect subpart I) and the subpart L 

confidentiality determinations, temporarily requires less 

detailed reporting under subpart L than would otherwise have 

been required by the November 2010 Subpart L final rule (75 FR 

74774), defers the deadline for reporting a data element used as 

an input to emission equations under subpart L, removes a data 

reporting requirement and otherwise provides flexibilities under 

subpart W, and removes the requirement for some facilities to 

report under subpart TT. A shorter effective date in such 

circumstances is consistent with the purposes of APA section 

553(d), which provides an exception for any action that grants 

or recognizes an exemption or relieves a restriction.

Judicial Review. Under section 307(b)(1) of the CAA,

judicial review of this final rule is available only by filing a 

petition for review in the U.S. Court of Appeals for the 

District of Columbia Circuit (the Court) by [INSERT THE DATE 60 

DAYS AFTER THE DATE OF PUBLICATION OF THE FINAL RULE IN THE 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

FEDERAL REGISTER]. Under CAA section 307(d)(7)(B), only an 

objection to this final rule that was raised with reasonable 

specificity during the period for public comment can be raised 

during judicial review. Section 307(d)(7)(B) of the CAA also 

provides a mechanism for the EPA to convene a proceeding for 

reconsideration, “[i]f the person raising an objection can 

demonstrate to EPA that it was impracticable to raise such 

objection within [the period for public comment] or if the 

grounds for such objection arose after the period for public 

comment (but within the time specified for judicial review) and 

if such objection is of central relevance to the outcome of the 

rule.” Any person seeking to make such a demonstration to us

should submit a Petition for Reconsideration to the Office of 

the Administrator, Environmental Protection Agency, Room 3000, 

Ariel Rios Building, 1200 Pennsylvania Ave., NW., Washington, DC 

20460, with a copy to the person listed in the preceding FOR 

FURTHER GENERAL INFORMATION CONTACT section, and the Associate 

General Counsel for the Air and Radiation Law Office, Office of 

General Counsel (Mail Code 2344A), Environmental Protection 

Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20004. Note, 

under CAA section 307(b)(2), the requirements established by 

this final rule may not be challenged separately in any civil or 

criminal proceedings brought by the EPA to enforce these 

requirements.
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Acronyms and Abbreviations. The following acronyms and 

abbreviations are used in this document.

CAA Clean Air Act

CBI confidential business information

CFR Code of Federal Regulations

CH4 methane

CO2 carbon dioxide

DOC degradable organic carbon

EF emission factor

EPA U.S. Environmental Protection Agency

FR Federal Register

GHG greenhouse gas

GHGRP Greenhouse Gas Reporting Program

kg/ft3 kilograms per cubic foot

CO2e carbon dioxide equivalent

N2O nitrous oxide

NAICS North American Industry Classification System

NTTAA National Technology Transfer and Advancement Act

OMB Office of Management and Budget

psia pounds per square inch absolute

QSARs quantitative structure activity relationships

RFA Regulatory Flexibility Act

SF6 sulfur hexafluoride

U.S. United States

UMRA Unfunded Mandates Reform Act of 1995

Organization of This Document. The following outline is 

provided to aid in locating information in this preamble. 

I. Background

A. Organization of This Preamble

B. Background on the Final Rule

C. Legal Authority

D. How do these amendments apply to 2012 reports?
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E. How do these amendments affect confidentiality 

determinations?

II. Final Amendments and Responses to Public Comments

A. Subpart A – General Provisions

B. Subpart TT – Industrial Waste Landfills

C. Subpart W – Petroleum and Natural Gas Systems

D. Subpart L – Fluorinated Gas Production

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 (RFA)

D. Unfunded Mandates Reform Act (UMRA)

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 Risks and Safety Risks

H. Executive Order 13211: Actions 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

I. Background

A. Organization of This Preamble

This preamble consists of three sections. The first section 

provides background on 40 CFR part 98 and describes the purpose 

and legal authority for this action.

The second section of this preamble summarizes the 

revisions made to the specific requirements for the general 

provisions (subpart A), industrial waste landfills (subpart TT), 

petroleum and natural gas systems (subpart W) and fluorinated 

gas production (subpart L) of 40 CFR part 98. It also describes 
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the major changes made to these source categories since proposal 

and provides a brief summary of significant public comments and 

EPA’s responses on issues specific to each source category. 

Additional responses to significant comments can be found in the 

document “2012 Technical Corrections, Clarifying and Other 

Amendments to the Greenhouse Gas Reporting Rule, and 

Confidentiality Determinations for Certain Data Elements of the 

Fluorinated Gas Source Category – Responses to Public Comment” 

in the docket to this rulemaking.

The third section of this preamble discusses the various 

statutory and executive order requirements applicable to this 

rulemaking. 

B. Background on the Final Rule

This action finalizes amendments to provisions in 40 CFR 

part 98, subparts A, TT, W, and L. The 2009 final GHG Reporting 

Rule was published in the Federal Register on October 30, 2009 

(74 FR 56260, hereafter referred to as the “2009 final rule” or 

“Part 98”). The 2009 final rule, which finalized reporting 

requirements for 30 source categories, did not include subparts 

TT, W, and L. Subsequent notices were published in 2010 

finalizing the requirements for subpart TT (75 FR 39736, July 

12, 2010), subpart W (75 FR 74458, November 30, 2010), and 

subpart L (75 FR 74774, December 1, 2010). Following the 

promulgation of these subparts, the EPA finalized four technical 
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corrections and clarifying amendments to these and other 

subparts under the Greenhouse Gas Reporting Program (GHGRP).1

In a separate recent action, the EPA proposed corrections, 

clarifying, and other amendments to subparts A, TT, W, and L on 

May 21, 2012 (77 FR 29935), hereinafter “2012 Technical 

Corrections Proposal.” In that action, the EPA proposed several 

amendments to specific provisions in these subparts to provide 

greater clarity and flexibility to facilities subject to 

reporting in 2012. The EPA also proposed an amendment to Table 

A–7 of subpart A to add a subpart L data element that was 

inadvertently omitted in the final deferral rule2 to defer its 

reporting deadline until 2015. In this action, the EPA is 

finalizing amendments to provisions in subparts A, TT, W, and L.

On January 10, 2012 (77 FR 1434), the EPA proposed 

confidentiality determinations for data elements (excluding 

those used as inputs to emission equations) in eight subparts of 

Part 98, including subpart L. In the 2012 Technical Corrections 

Proposal, the EPA proposed, among other things, four new data 

elements for subpart L and confidentiality status for those four 

new subpart L data elements. In this action, the EPA is 

finalizing the addition of four new data elements to subpart L 

and their confidentiality determinations.

 

1 75 FR 66434, October 28, 2010; 75 FR 79092, December 17, 2010; 76 FR 73866, 

November 29, 2011; 76 FR 80554, December 23, 2011.

2 76 FR 53057, August 25, 2011
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

C. Legal Authority

The EPA is promulgating these rule amendments under its 

existing CAA authority, specifically authorities provided in CAA 

section 114. As stated in the preamble to the 2009 final rule 

(74 FR 56260, October 30, 2009) and the Response to Comments on 

the April 10, 2009 initial proposed rule,

3 Volume 9, Legal 

Issues, CAA section 114 provides the EPA broad authority to 

require the information proposed to be gathered by this rule 

because such data would inform and are relevant to the EPA’s 

carrying out a wide variety of CAA provisions. As discussed in 

the preamble to the initial proposed rule (74 FR 16448, April 

10, 2009), CAA section 114(a)(1) authorizes the Administrator to 

require emissions sources, persons subject to the CAA, 

manufacturers of control or process equipment, or persons who 

the Administrator believes may have necessary information to 

monitor and report emissions and provide such other information 

the Administrator requests for the purposes of carrying out any 

provision of the CAA. For further information about the EPA’s 

legal authority, see the preambles to the 2009 proposed and 

final rules and EPA’s Response to Comments, Volume 9.

In addition, the EPA is making confidentiality 

determinations for four data elements in subpart L, under its 

authorities provided in sections 114, 301, and 307 of the CAA. 

 

3 See http://www.epa.gov/climatechange/emissions/responses.html
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As mentioned above, CAA section 114 provides the EPA authority 

to obtain the information in Part 98, including the four new 

data elements we have added to subpart L. Section 114(c) 

requires that the EPA make information obtained under section 

114 publicly available, except where information qualifies for 

confidential treatment. Section 114(c) excludes emission data 

from qualifying for confidential treatment. The Administrator 

has determined that this action (amendment and confidentiality 

determination) is subject to the provisions of section 307(d) of 

the CAA.

D. How do these amendments apply to 2012 reports?

As explained in the preamble to the 2012 Technical 

Corrections Proposal, our response to comments, and this notice, 

we believe that it is feasible for reporters to implement the 

changes for the 2011 reporting year, for which reports are due 

by September 28, 2012. The revisions that apply to the reporting 

for 2011 are primarily technical corrections, and provide 

clarification regarding the existing regulatory requirements or 

reduce the amount of information that is required to be 

reported.

In the case of 40 CFR part 98, subpart A, the amendment is 

merely a harmonizing change to a technical correction finalized 

in February 2012 for subpart I (see 77 FR 10373). This change is 

effective for reporting year 2012 and does not affect reporting 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

year 2011. The February 2012 subpart I technical correction 

required reporters to calculate emissions of certain additional 

fluorinated heat transfer fluids under subpart I; however, the 

February 2012 correction inadvertently omitted an amendment to a 

corresponding requirement in subpart A to include those 

calculated emissions in the annual GHG report. This action 

corrects this omission by requiring that reporters include these 

emissions from heat transfer fluids in their facility level 

totals reported to the EPA in the annual GHG report. 

Additionally, as proposed, this rule adds one data element to 

Table A-7 to Subpart A (Table A-7 lists data elements whose 

reporting deadline is deferred until 2015). This element was 

inadvertently omitted in the final deferral rule defers the 

reporting of one additional input until 2015. Because this 

reduces the reporting requirements, the EPA has determined that 

it is feasible for this amendment to apply to the reporting year 

2011; therefore this data element would not need to be reported 

until 2015.

In the case of 40 CFR part 98, subpart TT, this final rule 

excludes some facilities from the reporting requirements and 

reduces the burden by making it easier for facilities to 

determine applicability of subpart TT under the GHG Reporting 

Rule. The excluded facilities are not expected to emit GHGs 
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since they receive only inert wastes that do not generate 

methane.

In the case of 40 CFR part 98, subpart W, the amendments 

include technical corrections that, while important to allow 

reporters to calculate emissions accurately, do not materially 

affect the actions facilities must take to comply with the rule. 

For example, in this action the EPA has corrected the emission 

factors in Table W-1A of subpart W for the onshore petroleum and 

natural gas production segment, due to an error in the December 

23, 2011 Technical Revisions to the Petroleum and Natural Gas 

Systems Category of the Greenhouse Gas Reporting Rule (76 FR 

80554, December 23, 2011, referred hereinafter as the “December 

2011 technical corrections final rule”), where EPA incorrectly 

revised several of the emission factors in this table. This 

final rule corrects this error but does not materially affect 

the actions a facility must undertake to comply with subpart W. 

In the case of 40 CFR part 98, subpart L, facilities 

subject to subpart L will report greenhouse gas emissions in a 

more aggregated manner in 2012 and 2013. This amendment is 

temporary (i.e., for 2012 and 2013 only) to allow the EPA time 

to fully evaluate concerns recently raised by stakeholders 

regarding reporting, and subsequent EPA release, of certain 

emission data.
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As explained above, we have concluded that it is 

appropriate to have these amendments to subpart A, Table A-7 and 

subparts TT and W apply to the 2011 reporting year, for which 

reporting occurs on September 28, 2012. For additional 

background information regarding some of these amendments, 

please refer to the Technical Support Document for the 2012 

Technical Corrections, Clarifying and Other Amendments to 

Certain Provisions of the Greenhouse Gas Reporting Rule 

proposal, available in the docket for this rulemaking (EPA–HQ–

OAR–2011-0147-0041). 

E. How do these amendments affect confidentiality 

determinations?

The amendments in this action do not affect the 

confidentiality determinations for subpart A data elements 

finalized in the “Confidentiality Determinations for Data 

Required Under the Mandatory Greenhouse Gas Reporting Rule and 

Amendments to Special Rules Governing Certain Information 

Obtained Under the Clean Air Act,”4 (hereinafter referred to as 

the “2011 Final CBI rule”) or the proposed determinations for 

subparts W,5 L,6 and TT.7 In this notice, we are also finalizing 

 

4 See 75 FR 30782, May 26, 2011.

5 See 77 FR 11039, February 24, 2012.

6 See 77 FR 1434, January 10, 2012.

7 See 75 FR 30782, May 26, 2011 for final confidentiality determination for 

subpart TT. See 77 FR 1434, January 10, 2012 for proposed confidentiality 

determinations for new subpart TT data elements added by the December 2011 

technical corrections final rule subsequent to the final confidentiality 

determinations made in 75 FR 30782. For the final determinations for the new 
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confidentiality determinations for the four new subpart L data 

elements also added in this rule. The confidentiality 

determinations for these new data elements together with our 

rationale are discussed in Section II.D.1 of this preamble. 

This rule does not include confidentiality determinations 

for subparts A, W, and TT. For the subpart A amendments, we are 

not making any confidentiality determinations because the data 

element being added is a subset of another data element in 

subpart I for which we have already proposed a CBI 

determination. Additionally, we are not making any 

confidentiality determination at this time for the subpart L 

data element added to Table A-7 of subpart A to defer the 

deadline for reporting until 2015. For subpart W, in addition to 

deleting an existing data element, the amendments in this action 

make only minor clarifications to the existing reporting 

requirements in that subpart, which do not change the type of 

data to be reported. Therefore, there is no change to the 

proposed confidentiality determinations for the data elements in 

that subpart. There are no amendments to the reporting 

requirements for subpart TT.

II. Final Amendments and Responses to Public Comments

 

subpart TT data elements, see the recently signed action titled Final

Confidentiality Determinations For Nine Subparts and Amendments to Subparts A 

and I Under the Mandatory Reporting of Greenhouse Gases Rule.
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In this action, the EPA is amending several provisions in 

subparts A, TT, W, and L of 40 CFR part 98 to provide greater 

clarity and flexibility. The amendments are listed in this 

section by subpart, followed by a more detailed summary of the 

final amendments to the various provisions and the EPA’s 

responses to major comments submitted on those amendments. We 

indicate where an amendment is being finalized as proposed and 

where an amendment differs from that which was proposed in the 

2012 Technical Corrections Proposal. For additional comments and 

EPA’s response to those comments please see the comment response 

document available in Docket ID No. EPA–HQ–OAR–2011–0147. 

A. Subpart A – General Provisions

1. Summary of Final Amendments

As proposed, this action amends the general reporting 

requirements of 40 CFR 98.3(c)(4) of subpart A, which specifies 

the types of data and format for reporting emissions in the 

annual GHG reports (e.g., annual emissions from each source 

category by GHG). In addition to the proposed amendments to 

98.3(c)(4), EPA has included one additional edit to 40 CFR 

98.3(c)(4) that did not appear in the proposal. This additional 

amendment adds the text “and each fluorinated heat transfer 

fluid (as defined in §98.98)” to the introductory sentence of 40 

CFR 98.3(c)(4). Although this edit was not proposed in the 2012 

Technical Corrections Proposal, it is being added as a 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

clarifying change to the regulatory language. EPA has determined 

that this additional edit does not substantively change the 

amendments that were proposed and is administrative in nature. 

The amendment to subpart A that was proposed in the 2012 

Technical Corrections proposal specifies that facilities subject 

to subpart I must include all fluorinated HTFs listed in Table 

A-1 of subpart A in the computation of CO2e that is required by 

40 CFR 98.3(c)(4)(i). Specifically, facilities must report each 

fluorinated HTF that is also a fluorinated GHG under 40 CFR 

98.3(c)(4)(iii)(E) and each fluorinated HTF that is not a 

fluorinated GHG in the new data element, 40 CFR 

98.3(c)(4)(iii)(F). This change, effective for reporting year 

2012, conforms with the amendments to reporting requirements for 

heat transfer fluids (fluorinated HTFs) that were published on 

February 22, 2012 (77 FR 10373). This change simplifies 

reporting for facilities and reduces burden by amending subpart 

A to be consistent with the requirements in subpart I. Given 

that facilities are already required to calculate emissions of 

fluorinated HTFs under subpart I, reporters already have the 

necessary data to comply with the final rule amendments.

As proposed in the 2012 Technical Corrections Proposal, we 

are also amending Table A-7 to subpart A to add a subpart L data 

element used as an input to an emission equation (Equation L-6) 

that was inadvertently omitted in the final deferral rule. Table 
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A-7 to subpart A lists the inputs to emission equations whose 

reporting deadlines have been deferred until March 31, 2015. 

Table A-7 to subpart A is amended to include the data element, 

“the mass of each fluorine-containing product produced by the 

process” (40 CFR 98.126(b)(7)); as is already the case with all 

other subpart L data elements assigned to the inputs to 

equations data category, this change defers the reporting 

deadline for this data element until March 31, 2015.

2. Summary of Comments and Responses

We received no comments on the proposed amendments to 

subpart A.

B. Subpart TT – Industrial Waste Landfills

1. Summary of Final Amendments

As proposed, we are amending subpart TT to exempt 

industrial waste landfills that receive only inert materials 

from reporting under this subpart. As discussed in the preamble 

to the proposed rule (77 FR 29935, May 21, 2012), this amendment 

ensures that landfills that are not expected to emit GHGs are 

excluded from reporting under this subpart. Specifically, we are 

adding, as proposed, a degradable organic content (DOC) value 

exclusion (provided in weight percent on a wet basis) as 40 CFR 

98.460(c)(2)(xiii). 

2. Summary of Comments and Responses
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

We received two comments on the proposed amendment to 

subpart TT. Both comments supported EPA’s proposed amendments. 

This section contains a brief summary of one of the 

comments received on the proposed changes to subpart TT and our 

response. Additional comments and responses thereto can be found 

in the document, “Response to Comments: 2012 Technical 

Corrections, Clarifying and Other Amendments of the Mandatory 

Reporting of Greenhouse Gases Rule, and Confidentiality 

Determinations for Certain Data Elements of the Fluorinated Gas 

Source Category” (see EPA–HQ–OAR–2011–0147). 

Comment: One commenter requested clarification on the 

number of test results from the use of the anaerobic 

biodegradation test that are required to determine whether or 

not a facility meets the definition of the source category under 

this subpart.

Response: One representative sample must be taken and 

tested using an anaerobic biodegradation test in order to 

determine if a waste stream is inert and therefore the landfill 

is exempted from reporting under 40 CFR 98.460(c)(2)(xiii). This 

is consistent with the number of samples required for 

determining an exemption using the volatile solids concentration 

under 40 CFR 98.460(c)(2)(xii). The EPA agrees that a 

clarification is needed because Part 98 currently does not 

specify the number of samples necessary to determine whether the 
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exemption applies. Therefore, we have added text to 40 CFR 

98.464(b) to provide this clarification. The EPA notes that 

while only one representative sample must be taken from each 

waste stream to be tested, the anaerobic biodegradation test 

must be performed according to the steps described in 40 CFR 

98.464(b)(i), which requires multiple waste samples to be 

tested. Therefore, if only one representative sample is taken 

from a waste stream, the sample taken must be of sufficient size 

to be subdivided and tested according to the requirements in 40 

CFR 98.464(b)(i). 

C. Subpart W – Petroleum and Natural Gas Systems 

1. Summary of Final Amendments

The EPA is finalizing several technical corrections and 

amendments to subpart W as proposed in the 2012 Technical 

Corrections Proposal to correct equations and otherwise clarify 

provisions in the rule to ensure consistency across the 

calculation, monitoring, and reporting requirements in subpart W 

and thereby facilitate reporting. The EPA is finalizing the 

following technical corrections and amendments as proposed: 

 Removing a factor of 1,000 from the denominator of Equation 

W-6 in 40 CFR 98.233(e)(5) so that the emissions are

calculated in standard cubic feet rather than thousand 

standard cubic feet. 

 Providing reporters with the option to take and use more 

than the prescribed number of sample measurements per 

unique well tubing diameter and pressure group combination 

per sub-basin. 
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 Changing the parameter “FRp” to “FR” in Equation W-7 in 40 

CFR 98.233(f)(1) to avoid confusion. 

 Amending the parameter “Tp” and its definition in Equation 

W-7 to clarify that it refers to the cumulative amount of 

time in hours of venting for each well as opposed to the 

time for the measured well(s).

 Revising the definition of parameter “SPp” in Equation W-8 

in 40 CFR 98.233(f)(2) to clarify that the reporter must 

take a ratio of casing to tubing pressure. 

 Updating Equation W-8 and also Equation W-9 in 40 CFR 

98.233(f)(2) and (f)(3) by replacing the subscript “q” with 

“p” in parameter “SFR” to match the definition of parameter 

“SFRp.”

 Clarifying that the terms “Vp” and “HRp,q” in Equations W-8 

and W-9 are to be monitored per unloading event.

 Clarifying that Calculation Methodology 3 applies to well 

venting, not “each” well venting and that parameter “W” in 

Equation W-9 is the total number of wells with plunger lift 

assist.

 Revising the term “backflow” to read “flowback” in 40 CFR 

98.233(g) and (g)(1).

 Adding subscript “s” to several parameters in Equations W10A and W-10B to clarify that these parameters are at 

standard conditions.

 Clarifying that the flow volume variable “FVs,p” in 

Equation W-10B is at standard cubic feet.

 Clarifying that the outputs of Equations W-11A and W-11B

are at actual conditions by inserting the word “actual” in 

the definition of flow rate, “FR,” and also adding a 

subscript “a” to denote inputs at actual conditions. 

 Adding a reference to Equation W-12 in 40 CFR 

98.233(g)(1)(iii) in the parameter definition “FRs,p” to 

convert “FRa” to standard conditions. 

 In Equations W-11A and W-11B, clarifying the definition of 

orifice cross sectional area, “A” to state “Cross sectional 

open area of the restriction orifice (m2).” (Adding the 

terms “open” and "the restriction.”)

 Providing reporters with the option to take and use more 

than the prescribed number of sample measurements per subbasin and well type (horizontal or vertical). 
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 Amending Equation W-13 to clarify that the output is a sum 

of emissions from all completions and workovers without 

hydraulic fracturing within a sub-basin.

 Revising parameter “Es,n” in the parameter description to 

match the letter case of the term in Equation W-14B, 

revising the term “Ta” to “Ta,p” in Equation W-14B, and 

clarifying that the temperature is for each blowdown “p.”

 Revising 40 CFR 98.233(j)(5) to clarify that the term 

“throughput” refers to “average daily throughput of oil.” 

 Revising the definition of “Count” in Equation W-15 of 40 

CFR 98.233(j)(5) to clarify that the reporters are to count 

only the separators or wells that feed oil directly to the 

storage tank. 

 Revising the parameter definition of “1000” to accurately 

describe the conversion occurring through this parameter.

 Revising the definition of “PR” in Equation W-17B of 40 CFR 

98.233(l)(3) to clarify that the production rate is in 

actual and not standard conditions.

 Removing and reserving 40 CFR 98.233(n)(7) to harmonize the 

language with the reporting requirements in 40 CFR 98.236.

 Providing the proper notation for the summations in 

Equations W-23, W-24, W-27, and W-28 so that owners and 

operators may correctly calculate GHG emissions from 

centrifugal and reciprocating compressors. 

 Amending 40 CFR 98.233(o)(7) to remove the word “thousand” 

in parameter “EFi” in Equation W-25.

 Revising the definition of parameter EFi in Equation W-25 

in 40 CFR 98.233(o)(7) by deleting the term “thousand.”

 Amending an incorrect reference in 40 CFR 98.233(r)(2) to 

“Table W-1A” instead of “Table 1-A.” 

 Revising the phrase “meter or regulator” in 40 CFR 

98.233(r)(6)(ii) and replacing it with “meter/regulator.” 

 Revising 40 CFR 98.233(t) to clarify that reporters do not 

need to alter their calculation results to standard 

conditions if the results already reflect standard 

conditions.

 Revising the definition of parameter “ρi” in Equation W-36 

to amend the density value of CH4 to be 0.0192 kg/ft3. 

Replacing the parameter “ECO2” with “Ea,CO2” in the parameter 

definition for Equation W-39A in 40 CFR 98.233(z)(2)(iii) 

to match the parameters in the equation.
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 Revising the definition of “HHV” in Equation W-40 in 40 CFR 

98.233(z)(2)(vi) to reflect the “higher” heating value

represented by the acronym.

 Amending 40 CFR 98.236(c)(5)(ii)(D) to clarify that the 

average internal casing diameter of all wells, as opposed 

to each well, must be reported. 

 Amending 40 CFR 98.236(c)(9) to remove reference to the 

optical gas imaging instrument. 

 Amending 40 CFR 98.236(c)(13)(iii)(C) to replace the units 

of “cubic feet per hour” with “metric tons of CO2e for each 

gas” to align the units of this data reporting element to 

those of the general provisions of Part 98, 40 CFR 

98.3(c)(4)(i), which require reporting of annual emissions 

in units of mass in metric tons of CO2e. 

 Updating the incorrect reference to “Equation W-30” in 40 

CFR 98.236(c)(15)(i)(B) to read “Equation W-30A,” updating 

the incorrect reference to “Equation W-30” in 40 CFR 

98.236(c)(15)(i)(C) to read “Equation W-30A,” and deleting 

the unnecessary reference to “parameter GHGi” in 40 CFR 

98.236(c)(15)(i)(C).

 Removing the text references to “(a)(4)” and “W-3” in 40 

CFR 98.236(c)(15)(ii)(A) by deleting the unnecessary 

references to “(a)(8).” 

 Deleting “and CH4” from the reporting requirements for EOR 

injection pumps in 40 CFR 98.236(c)(17)(v) to make the data 

reporting requirements consistent with the calculation 

procedures in Equation W-37.

 Revising the incorrect title of Table W-1A of subpart W by 

deleting “Table A-1A” and correcting it to “Table W-1A.”

 Correcting the emission factors in Table W-1A of subpart W 

as proposed. 

 Amending Table W-5 of subpart W to provide the crossreference for footnote 2, by adding a reference associated 

with footnote 2 to Vapor Recovery Compressor.

In addition to finalizing the amendments proposed in the

2012 Technical Corrections Proposal, the EPA is finalizing 

several additional corrections to address areas where further 

clarifications to the subpart W were considered appropriate 
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based on comments received on the 2012 Technical Corrections 

Proposal:

 Removing the factors 365 days and “T” from Equation W-6 of 

subpart W and adding a new factor “N” for the number of 

dehydrator openings in the calendar year.

 Correcting the definition of parameter “SPp” in Equations 

W-8 to state that casing pressure is to be measured for 

wells with no packer, as opposed to taking the shut-in 

pressure or surface pressure measurement for wells with no 

packers.

 Correcting the definition of the term “PRs,p” in Equation 

W-10A to remove the phrase “under actual conditions, 

converted to standard conditions.”

 Correcting the definition of the terms “SGs,p” and “EnFs,p” 

in Equation W-10A to include omitted subscripts in the 

parameter references.

 Correcting the definition of the term “W” in Equation W-12 

by replacing the word “formation” with “combination.”

 Amending 40 CFR 98.233(o)(5), (o)(6), (o)(7), (p)(7), and 

(p)(7)(i) to clarify that the annual emissions must be 

estimated for each compressor for each mode-source 

combination measured in the reporting year.

 Correcting the definitions of the terms “Es,n” and “Ea,n” 

in Equation W-33 by deleting the parentheses around the 

terms “FRs,p” and “FRa,p”, respectively.

 Amending 40 CFR 98.236(c)(6), (c)(13)(i)(G), 

(c)(13)(ii)(C), (c)(13)(iii)(C), (c)(13)(iv),

(c)(13)(v)(B), (c)(14)(i)(C), (c)(14)(ii)(C), 

(c)(14)(iii)(C), (c)(14)(iv), and (c)(14)(v)(B) to clarify 

emission reporting requirements for compressors.

Since the amendments to subpart W finalized in this action 

do not change the type of information that must be collected, 

the methods used to collect the data, or materially affect how 

the emissions are calculated, we are requiring reporters to 

implement the amendments finalized in this action for the 

September 28, 2012 reporting deadline. 
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2. Summary of Comments and Responses

This section contains a brief summary of comments on the 

proposed changes to subpart W and responses. Additional comments 

and responses thereto can be found in the document, “Response to 

Comments: 2012 Technical Corrections, Clarifying and Other 

Amendments of the Mandatory Reporting of Greenhouse Gases Rule, 

and Confidentiality Determinations for Certain Data Elements of 

the Fluorinated Gas Source Category” (see EPA–HQ–OAR–2011–0147). 

The EPA received several comments on the 2012 Technical 

Corrections Proposal that the EPA has determined to be out of 

the scope of this rulemaking. These comments were diverse in 

nature, and covered several provisions within subpart W. Some of 

the comments were more technical in nature, for example, one 

comment included a revised definition of parameter "Tp" of 

Equation W-7 to allow for reporters to use alternative methods 

such as engineering estimates based on best available data to 

determine the cumulative amount of time in hours of venting for 

specific wells. Other comments included more substantive 

revisions and clarifications to the final provisions, for 

example several comments were submitted on the monitoring 

provisions for both centrifugal and reciprocating compressors 

and included revisions to equation parameters and definitions 

and address concerns previously raised by reporters. Also, by 

way of a third example, some of the comments submitted were 
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requests for clarification on the final provisions, for example, 

one comment included a request for clarification on the 

requirement in 40 CFR 98.236 for reporting of “annual throughput 

as determined by engineering estimate based on best available 

data.” The EPA has reviewed these comments, and although these 

comments are out of the scope of the 2012 Technical Corrections 

proposal, the EPA is considering ways to address these comments 

including possible future rulemakings or development of 

materials to post on EPA’s subpart W website.

Comment: One commenter recommended that Equation W-6 be 

amended to account for situations where desiccant dehydrator 

molecular sieves are used. The commenter further stated that 

this change was necessary because natural gas processors 

commonly use desiccant dehydrator molecular sieves which 

typically only require the dehydrator to be opened to the 

atmosphere once every 3 or 4 years when the molecular sieves are 

replaced. The commenter noted that the proposed Equation W-6 

accounts for the number of dehydrator vessel openings by 

dividing 365 days per year by the number of days “T” between 

refilling. The commenter recommended revising Equation W-6 by 

removing both the 365 day factor in the numerator and the 

variable “T” in the denominator and adding a new term “N” 

(number of dehydrator change-outs per year) to the numerator.
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Response: The EPA has reviewed the commenter’s suggested 

change to Equation W-6 to account for situations where desiccant 

dehydrator molecular sieves are used in desiccant dehydrators 

such that the equation will accurately adjust for the number of 

times the dehydrator vessel is opened to the atmosphere when it 

may occur less frequently than once per year. While the revision 

that EPA proposed in the 2012 Technical Corrections Proposal 

included a proposed amendment to Equation W-6 separate from what 

the commenter suggested, we agree that Equation W-6 can be 

amended as noted by the commenter to adjust for dehydrator 

vessels that are opened once over a multiple year time period. 

In these cases where vessels are opened less frequently than 

once per year, using Equation W-6 as written in the final 

subpart W rule would result in an inaccurate estimate of 

emissions. Therefore, we have amended Equation W-6 of subpart W 

as recommended by the commenter. EPA believes that finalizing 

this technical correction does not change the type of 

information collected by reporters who would use this equation, 

and that it is feasible to implement this correction for the 

2011 reporting year. 

Comment: Two commenters expressed support for EPA’s 

proposed technical corrections to Equations W-23, W-24, W-27, 

and W-28. However, two commenters further noted that even though 

the 2012 Technical Corrections Proposal correctly proposed 
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removing the summation terms in Equations W-23, W-24, W-27 and 

W-28, the equations for calculating emissions from centrifugal 

compressors (Equations W-23 and W-24) and reciprocating 

compressors (Equations W-27 and W-28) were still incomplete 

because either the parameters or the definitions of those 

parameters did not fully align with the proposed technical 

amendments. Commenters recommended either revising the parameter 

definition for “Es,i” or including a definition for the operator 

“m” in the equation definitions for Equation W-23 and W-27.

Commenters also recommended including a definition for the 

parameter “MTm,p” in Equation W-24 and W-28.

Response: In the 2012 Technical Corrections Proposal, the 

EPA proposed to make corrections, though few, to Equations W-23, 

W-24, W-27 and W-28 so that owners and operators would correctly 

calculate GHG emissions using those equations. In this action, 

the EPA is finalizing the amendments to both the centrifugal 

compressor and reciprocating compressor emission sources as 

proposed in the 2012 Technical Corrections Proposal. In response 

to those comments, the EPA is finalizing a limited set of 

additional corrections for both the centrifugal and 

reciprocating compressor emission sources. Specifically, in 

Equations W-23 and W-27, the EPA has finalized a correction to 

the definition for parameter “Es,i” such that the proposed 

amendments in the 2012 Technical Corrections Rule would 
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correctly align with the proposed amendment to remove the 

erroneous summation sign from these equations. EPA has reviewed 

the comments submitted, and in this action is revising the 

definition for parameter “Es,i” in Equations W-23 and W-27, by 

adding the subscript “m” so the parameter now reads “Es,i,m”. EPA 

has also revised the parameter definition to clarify that the 

annual volumetric GHG emissions are to be calculated for each 

centrifugal compressor (for Equation W-23) and for each 

reciprocating compressor (Equation W-27) for each of the modesource combination in cubic feet. Similarly, for Equations W-24 

and W-28 the EPA has revised the definition for parameters

“MTm,p” and “m” in response to comments received on the 2012 

Technical Corrections proposed rule. The definition for 

parameter “MTm,p” has been clarified to state that this parameter 

refers to the flow measurement from all compressor sources in 

each mode-source combination in standard cubic feet per hour, 

and the definition for parameter “m” has been clarified to state 

that this parameter refers to each compressor mode-source 

combination. 

Comment: One commenter agreed with the proposed change to 

40 CFR 98.236(c)(13)(iii)(C) to correct the units for the 

centrifugal compressor emission source to be reported in units 

of mass as opposed to units of cubic feet per hour. This same 

commenter further noted that EPA should also apply a correction 
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to the data reporting requirements for other provisions in 40 

CFR 98.236(c)(13) and (c)(14) such that data from these two 

emissions sources, centrifugal compressors and reciprocating 

compressors would be reported consistently on a mass unit basis. 

The commenter also noted that the references to the equations in 

40 CFR 98.233 that are cited in the data reporting requirements 

for 40 CFR 98.236(c)(13) and (14) should be removed.

Response: In the 2012 Technical Corrections Proposal, the 

EPA proposed a correction to the reporting units for centrifugal 

compressors such that the data would be reported in mass units 

for carbon dioxide equivalent instead of units of cubic feet per 

minute. EPA agrees with the commenters and has corrected the 

units for the applicable provisions in 40 CFR 98.236(c)(13) and 

(14) such that the data will be reported consistently on a mass 

basis. The EPA recognizes that corrections to the units to the 

data reporting requirements in 40 CFR 98.236(c)(13) and (14) 

were not proposed in the 2012 Technical Corrections Proposal; 

however, the EPA believes that applying the correction proposed 

in the 2012 Technical Corrections Proposal throughout the data 

reporting requirements for these emission sources would be 

logical, and would also assist reporters in submitting the data. 

Subpart W reporters are required to submit their data to the EPA 

by September 28, 2012 for data collected in 2011. Because these 

reports are being submitted for the first time, the EPA 
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considers this amendment necessary to ensure that the units for 

these data reporting requirements are consistent. Further, the 

EPA believes that this change is a technical correction that is 

logical in nature to apply to similar provisions for these two 

emission sources. Further, EPA believes that this change would 

result in less burden on reporters. Lastly, in line with the 

commenters suggestion to remove the 40 CFR 98.233 equation 

references found within specific data elements in 40 CFR 

98.236(c)(13) and (14), EPA has agreed with the commenter and in 

this action has removed the 40 CFR 98.233 equation references 

from the following data reporting elements, 40 CFR 

98.236(c)(13)(i)(G), 98.236(c)(13)(ii)(C), 

98.236(c)(13)(iii)(C), 98.236(c)(14)(i)(C), 

98.236(c)(14)(ii)(C), 98.236(c)(14)(iii)(C), and 

98.236(c)(14)(iv). 

Comment: One commenter questioned the proposed amendments

to the population emission factors in Table W-1A of subpart W. 

This commenter specifically questioned why the EPA increased the 

emission factors for valves, flanges, connectors, open-ended 

lines, and “other” components as listed in Table W-1A to Subpart 

W. The commenter further noted that the values previously 

included in Table W-1A were close to the commenter’s estimates 

when rounded up. Finally, the commenter recommended EPA not 
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revise the Table W-1A emission factors for valves, flanges, 

connectors, open-ended lines, and “other” components.

Response: The EPA disagrees with the commenter that the 

Table W-1A population emission factors should not be revised. In 

the December 2011 technical corrections final rule (76 FR 

80592), the emission factors were converted from a standard 

temperature of 68 °F to a standard temperature of 60 °F. In the 

December 2011 Final Rule, the EPA inadvertently used an 

incorrect intermediary version of Table W–1A to convert the 

emission factors, including the emission factors for the 

components noted by the commenter. The emission factors proposed 

in the 2012 Technical Corrections for Table W-1A show the 

emission factors correctly adjusted to a standard temperature of 

60oF. In this action, EPA is finalizing the emission factors in 

Table W-1A as proposed in the 2012 Technical Corrections 

Proposal.

Comment: One commenter stated that Equation W-14A contains 

an error in the purge factor that causes the equation to yield 

erroneous results. The commenter further stated that because the 

volume being purged is converted from actual cubic feet to 

standard cubic feet, inconsistent units were being subtracted, 

(i.e. standard cubic feet purged and actual cubic feet "purge 

factor") in Equation W-14A. The commenter also stated that the 

inconsistency would result in a negative number if the volume of 
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the purged item in standard cubic feet was less than that of 

actual cubic feet, (i.e. actual conditions are hotter or a lower 

pressure than standard conditions). Finally, the commenter 

stated that if the item is not being purged, the commenter 

believes the calculation should not be used, as there would be 

no GHG emissions from the blowdown stack. 

Response: The EPA agrees with the commenter that the 

natural gas remaining in the unique physical volume after the 

blowdown is complete without purging is at actual conditions. 

However, after a blowdown, “actual conditions” are essentially 

equivalent to atmospheric conditions, or standard conditions (as 

a simplifying assumption explained further below).

Equation W-14A calculates the volume of natural gas emitted 

from blowdowns. When equipment is depressurized, the gas 

contained in the unique volume expands as it goes from actual 

conditions (process pressure and temperature) to standard 

conditions (i.e., atmospheric pressure and temperature).

Equation W-14A accounts for this physical change. After 

expansion (i.e., venting), some gas will remain in the equipment 

or unique physical volume if the equipment is not purged. This 

unvented gas should be subtracted from the volume of expanded 

gas. If the remaining gas in the equipment is purged, then the 

purge factor in Equation W-14A equals zero and nothing will be 

subtracted from the emissions calculated earlier in the equation 
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as all of the expanded gas volume has been emitted to the 

atmosphere. If the remaining gas is not purged, then the purge 

factor equals one and the unique physical volume will be 

subtracted as it was not vented and released to the atmosphere. 

There are several simplifying assumptions in the equation to 

facilitate its use. It is assumed that the process temperature 

and/or pressure are significantly different than standard 

conditions. It is also assumed that the equipment is fully 

vented to the atmosphere, resulting in the final condition of 

the gas being at atmospheric temperature and pressure. It is 

also assumed that the atmospheric temperature and pressure are 

not significantly different than standard conditions. These 

simplifying assumptions are true in a majority, if not all 

cases. 

D. Subpart L – Fluorinated Gas Production 

1. Summary of Final Amendments and Confidentiality 

Determinations

Final amendments. As explained in Section I.D of this 

preamble, the EPA is deferring detailed reporting of GHG 

emissions from fluorinated gas production facilities until 2014 

in today’s final rule. In the meantime, the EPA is requiring 

that GHG emissions be reported in a more aggregated manner than 

previously required for the initial two years of reporting under 

subpart L. These changes pertain only to subpart L, and are 
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temporary (i.e., for reporting in 2012 and 2013) to allow the 

EPA sufficient time to fully evaluate concerns raised by 

stakeholders that reporting, and subsequent EPA release, of 

certain emissions would reveal trade secrets.

For reporting in 2012 and 2013, we are requiring owners and 

operators of facilities producing fluorinated gases to report 

annual total facility-wide fluorinated GHG emissions from 2011 

and 2012 respectively in tons of CO2e.8 The facilities are not 

required to report process level emissions or individual 

fluorinated GHGs in 2012 and 2013. These amendments do not 

change any other requirements of Part 98 or affect the deferral 

of the reporting deadline for subpart L data elements used as 

inputs to emission equations until March 31, 2015 (76 FR 53057, 

August 25, 2011). These amendments do not change the requirement 

that these subpart L data elements in today’s final rule be 

retained as records in a form that is suitable for expeditious 

inspection and review (required for all Part 98 records by 40 

CFR 98.3(g)).

As proposed, this final rule provides that owners and 

operators of facilities producing fluorinated gases are not 

 

8 This includes emissions from all fluorinated gas production processes, all 

fluorinated gas transformation processes that are not part of a fluorinated 

gas production process, all fluorinated gas destruction processes that are 

not part of a fluorinated gas production process or a fluorinated gas 

transformation process, and venting of residual fluorinated GHGs from 

containers returned from the field.
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required to submit the data elements listed below until March 

31, 2014:

 40 CFR 98.3(c)(4)(iii)

 40 CFR 98.126 (a)(2), (a)(3), (a)(4), (a)(6),(b), (c), (d), 

(e), (f), (g), and (h). 

Fluorinated gas producers subject to subpart L are required 

to report only the data elements in 40 CFR 98.126(a)(5) (the 

methods used) and in paragraph 40 CFR 98.126(j) (facility-level 

CO2e emissions) for reporting of 2011 and 2012 emissions in 2012 

and 2013. Consistent with 40 CFR 98.126(e), a facility must 

include any excess emissions, converted to CO2e, that result from 

malfunctions of the destruction device when reporting total 

facility CO2e under 40 CFR 98.126(j). However, as noted in 40 CFR 

98.126(j), these excess emissions do not need to be reported 

separately but must be included in the facility-wide CO2e 

reported. In this action, we have also amended 98.126(a)(5) as 

proposed to require facilities to report the methods used to 

determine emissions at a facility level rather than linking each 

method to a particular process.

The EPA requires that facilities use Equation A-1 of 

subpart A to calculate CO2e from the mass of fluorinated GHG 

emissions. For fluorinated GHGs that do not have a global 

warming potential (GWP) listed in Table A-1, facilities are 

required to use either a default GWP or their best estimate of 

the GWP, based on the information described in 40 CFR 
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98.123(c)(1)(vi)(A)(3).9 As discussed further in Section II.D.2 

of this preamble, we have clarified that use of quantitative 

structure activity relationships (QSARs), which are based on the 

chemical structure of the compound, is an acceptable method for 

estimating the GWP in situations where neither pure standards of 

the compound nor fourier transform infrared spectroscopy (FTIR) 

spectra for the chemicals mixed with the compound (i.e., 

impurities) are available. 

As proposed, the default GWP used depends on the type of 

fluorinated GHG. For fully fluorinated GHGs, the default GWP is 

10,000, which is based on the average GWP of the fully 

fluorinated GHGs in Table A-1 of subpart A. For the purposes of 

subpart L, the EPA is finalizing as proposed the addition of the 

definition of “fully fluorinated GHGs” to 40 CFR 98.128: 

“fluorinated GHGs that contain only single bonds and in which 

all available valence locations are filled by fluorine atoms. 

This includes but is not limited to saturated perfluorocarbons, 

SF6, NF3, SF5CF3, fully fluorinated linear, branched and cyclic 

alkanes, fully fluorinated ethers, fully fluorinated tertiary 

amines, fully fluorinated aminoethers, and perfluoropolyethers.” 

As proposed, for other fluorinated GHGs, the default GWP is 

 

9 This is part of the provision of subpart L that allows facilities to 

request to use provisional GWPs to calculate whether they must use 

stack testing to establish an emission factor for a vent. Note that 

EPA is not requiring approval of best-estimate GWPs in this action.
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2,000, which is based on the average GWP of the other 

fluorinated GHGs on Table A-1 of subpart A.

As proposed, we are adding four new data elements to the 

subpart L reporting requirements. Facilities that use one or 

more default or best-estimate GWPs are required to report the 

amounts of CO2e emissions that were calculated using each of the 

two default values as well as using best-estimate GWPs. This 

enables the EPA to understand the potential impact of the 

default or best-estimate GWPs on the uncertainty of the overall 

estimated emissions of the facility. (Default and best-estimate 

GWPs are likely to have higher uncertainties than GWPs from 

Table A-1.) Also as proposed, facilities using default or bestestimate GWPs for fluorinated GHGs without GWPs in Table A-1 of 

subpart A are required to keep records of the GWP they used for 

each GHG. As proposed, facilities using best-estimate GWPs are 

also required to keep records of the data and analysis that were 

used to develop the GWPs, in a form that is suitable for 

expeditious inspection and review (required for all Part 98 

records by 40 CFR 98.3(g)). As discussed further in Section 

II.D.2 of this preamble, we are updating the proposed 

recordkeeping requirement to specify that where QSARs are used 

to estimate GWPs, facilities must retain information related to 

the reliability of GWPs based on the QSARs.
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Final Confidentiality Determinations. We are finalizing the 

confidentiality determinations for the four new subpart L data 

elements (listed in Table 2 of this preamble) as proposed. In 

the proposal, we assigned these four data elements to the 

“Emissions” data category because they describe emissions 

exhausted to the atmosphere, and apply to these data elements 

the categorical confidentiality determination the EPA made in 

the 2011 Final CBI rule for that data category, i.e., the data 

elements in this data category are “emission data” under CAA 

section 114(c) and 40 CFR 2.301(a)(2)(i). We received no 

comments on our proposed category assignment and confidentiality 

determination described above. We are therefore finalizing the 

determination that these data elements are “emission data,” 

which are not eligible for confidential treatment under section 

114(c) of the CAA.

Table 2. Reporting Data Elements and Confidentiality 

Determinations

Citation Data Element

Data Category 

(Finalized CBI 

Determination10)

1 98.126(j)(3) You must report the total 

fluorinated GHG emissions of 

the facility, expressed in tons 

of CO2e.

Emissions (Emission 

Data: Made available 

to the public)

2 98.126(j)(3)(ii) Provide the total annual 

emissions across fluorinated 

GHGs for the entire facility, 

in metric tons of CO2e, that 

were calculated using the 

default GWP of 2000.

Emissions (Emission 

Data: Made available 

to the public)

 

10 The CBI determinations of these data categories were finalized in the 2011 

Final CBI Rule (May 26, 2011, 76 FR 30782).
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Citation Data Element

Data Category 

(Finalized CBI 

Determination10)

3 98.126(j)(3)(iii) Provide the total annual 

emissions across fluorinated 

GHGs for the entire facility, 

in metric tons of CO2e, that 

were calculated using the 

default GWP of 10,000.

Emissions (Emission 

Data: Made available 

to the public)

4 98.126(j)(3)(iv) Provide the total annual 

emissions across fluorinated 

GHGs for the entire facility, 

in metric tons of CO2e, that 

were calculated using your best 

estimate of the GWP. 

Emissions (Emission 

Data: Made available 

to the public)

2. Summary of Comments and Responses

This section contains a brief summary of comments on the 

proposed changes to subpart L and responses. 

Additional comments and responses thereto can be found in 

the document, “Response to Comments: 2012 Technical Corrections, 

Clarifying and Other Amendments of the Mandatory Reporting of 

Greenhouse Gases Rule, and Confidentiality Determinations for 

Certain Data Elements of the Fluorinated Gas Source Category” 

(see EPA–HQ–OAR–2011–0147).

Comment: One commenter recommended that 40 CFR 98.126(j) be 

revised to clarify that comparable methods for best-estimate 

GWPs based on use of professional judgment are acceptable if 

they result in accuracy that is comparable to the accuracy 

associated with the methods described in 40 CFR 

98.123(c)(1)(vi)(A)(3). This commenter stated that measurement 

of the low-pressure gas phase infrared absorption spectrum for a 
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particular fluorinated GHG is not possible where neither pure 

standards of the “target” fluorinated GHG nor FTIR spectra for 

the impurities are available. In such circumstances, the 

commenter recommended the EPA allow reporters to use 

quantitative structure activity relationships (QSARs) that 

mathematically relate the radiative forcing and/or atmospheric 

lifetime (i.e., reaction rate) of a compound to the chemical’s 

structure (i.e., type of compound, number of carbon-halogen 

bonds, etc.). The commenter believes that QSARs are a valid 

approach for obtaining a “best estimate” of GWP in situations 

where infrared spectroscopy cannot be used and that this 

approach is consistent with the methods that are described in 40 

CFR 98.123(c)(1)(vi)(A)(3). The commenter also stated that 

comparisons between measured and QSAR-derived GWPs have shown 

that the uncertainty associated with QSAR-derived estimates of 

radiative forcing is between 18 to 23 percent and that the 

uncertainty associated with QSAR-derived estimates of the 

atmospheric lifetime is 30 percent on average for a given class 

of compounds. The commenter stated that the overall uncertainty 

of QSAR-derived GWPs is a combination of these two 

uncertainties, but that use of a QSAR-based GWP is still more 

accurate than the default GWPs of 2,000 or 10,000 provided in 

the rule.
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Response: The EPA agrees with the commenter that for 

purposes of this rule, use of QSARs is an acceptable alternative 

method for estimating GWPs of fluorinated GHGs that do not have 

a GWP listed in Table A-1 of subpart A. QSARs are based on 

statistical analysis correlating the chemical or biological 

activity of compounds (including, e.g., radiative forcing and 

reaction rates) with their molecular structure and/or 

properties. The activity of one or more compounds is estimated 

(modeled) based on the activity of compounds with similar 

structures. The accuracy of QSAR-derived estimates depends on 

the structural similarity between the “target” compound and the 

group of compounds (often called “analogs”) used to model it and 

on the quantity and quality of the measurements of the activity 

of the analogs, among other factors. We are finding use of QSARs 

acceptable for purposes of this rule because they can provide 

reasonable estimates of the likely radiative forcing11 and 

lifetime of the compound, which is what the provisions described 

at 40 CFR 98.123(c)(1)(vi)(A)(3) are intended to ensure.

As requested by the commenter, we have revised 40 CFR 

98.126(j) to specify that the use of QSARs for determining GWPs 

is an acceptable method for situations where the infrared 

spectrum of a fluorinated GHG cannot be measured because neither 

 

11 Note that the actual radiative forcing also depends on other variables, 

such as whether or not the gas is sufficiently long-lived to become wellmixed in the atmosphere.
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pure standards of the “target” fluorinated GHG nor FTIR spectra 

for the impurities are available. In addition, we have revised 

the proposed recordkeeping requirements at 40 CFR 98.127 to 

require retention of information related to the reliability of 

GWPs based on QSARs. This includes information on how the 

structure of the “target” fluorinated GHG is similar to the 

structures of the fluorinated GHGs used to model the radiative 

forcing and/or reaction rate of the “target” fluorinated GHG, 

the quality and quantity of the measurements of the radiative 

forcings and/or reaction rates of the fluorinated GHGs used to 

model these parameters for the “target” fluorinated GHG, any 

estimated uncertainties of the modeled forcings and/or reaction 

rates, and descriptions and results of any efforts to validate 

the QSAR model(s).

Although we find the use of QSARs to be acceptable in this 

situation, we disagree with the commenter’s recommendation that 

the rule be revised to state that any comparable methods based 

on use of professional judgment are acceptable if they result in 

accuracy that is comparable to the accuracy associated with the 

methods described in 40 CFR 98.123(c)(1)(vi)(A)(3). Since the 

commenter provided no description of any other alternative 

methods, we are unable to assess whether other methods based on 

professional judgment would provide an acceptable level of 

accuracy. Thus, we are not including a blanket provision 
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permitting use of comparable methods based on professional 

judgment. 

III. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review and 

Executive Order 13563: Improving Regulation and Regulatory 

Review

This final rule, which finalizes several corrections to 

specific provisions in subparts A, TT, W, and L to provide 

greater clarity and flexibility to facilities subject to 

reporting in 2012 and finalizes confidentiality determinations

for amended subpart L reporting requirements, 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

These final rule amendments and confidentiality 

determinations do not increase the recordkeeping and reporting 

burden associated with Part 98. The amendments to subpart L 

result in a net decrease in burden since they result in less 

detailed reporting under subpart L than would otherwise have 

been required by the December 2010 Subpart L final rule. 

Although we have added new recordkeeping provisions to subpart 

L, these apply only to those facilities electing to use the 
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optional QSAR approach to determining GWPs instead of the 

default factors provided in the rule. Additionally, the subpart 

L confidentiality determinations do not impose any additional 

burden. The subpart A amendment is merely a harmonizing change 

to a technical correction finalized in February 2012 for subpart 

I that clarifies the existing reporting requirements. The 

subpart TT amendment excludes some facilities from the reporting 

requirements and reduces the burden by making it easier for 

facilities to determine applicability of subpart TT under the 

GHG Reporting Rule. Finally, the subpart W amendments are 

technical corrections and clarifications that help clarify GHG 

calculations and reporting and do not materially affect the 

actions facilities must take to comply with the rule or add any 

additional reporting requirements. The OMB has previously 

approved the information collection requirements for subparts A 

on October 30, 2009, subpart L on December 1, 2010, subpart W 

promulgated on November 30, 2010, subpart TT promulgated on July 

12, 2010 under 40 CFR part 98 under the provisions of the 

Paperwork Reduction Act, 44 U.S.C. 3501 et seq., and has 

assigned OMB control numbers 2060-0629; 2060-0650; and 2060-

0647; and 2060-0649 respectively. The OMB control numbers for 

the EPA’s regulations in 40 CFR are listed in 40 CFR part 9. 

Further information on the EPA’s assessment on the impact on 
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burden can be found in the 2012 Technical Corrections and 

Amendments Cost Memo in docket number EPA-HQ-OAR-2011-0147. 

C. Regulatory Flexibility Act (RFA)

The 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 this final rule on 

small entities, a small entity is defined as: (1) a small 

business as defined by the Small Business Administration’s 

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-forprofit enterprise which is independently owned and operated and 

is not dominant in its field. 

After considering the economic impacts of these final rule 

amendments on small entities, I certify that this action will 

not have a significant economic impact on a substantial number 

of small entities. These rule amendments and confidentiality 
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determinations will not impose any additional burden on small 

entities beyond that currently required by 40 CFR part 98, 

subpart A promulgated on October 30, 2009; subpart TT 

promulgated on July 12, 2010; subpart W promulgated on November 

30, 2010, or subpart L promulgated on December 1, 2010. The EPA 

is promulgating the amendments in this action to provide 

clarity, add flexibility, to address ambiguity in the rule 

provisions, and to make corrections where necessary to assist 

reporters in implementation of these subparts. 

Further, the EPA took several steps to reduce the impact of 

40 CFR part 98 on small entities when developing the final GHG 

reporting rules in 2009 and 2010. Specifically, the EPA 

determined appropriate thresholds that reduced the number of 

small businesses reporting. In addition, the EPA conducted 

several meetings with industry associations to discuss 

regulatory options and the corresponding burden on industry, 

such as recordkeeping and reporting. Finally, the EPA continues 

to conduct significant outreach on the GHG reporting program and 

maintains an “open door” policy for stakeholders to help inform 

the EPA’s understanding of key issues for the industries.

D. Unfunded Mandates Reform Act (UMRA)

This final 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 
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in any one year. Thus, the final rule amendments and 

confidentiality determinations for are not subject to the 

requirements of section 202 and 205 of the 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. The final 

amendments will not impose any new requirements that are not 

currently required for 40 CFR part 98, and the final rule 

amendments will not unfairly apply to small governments. 

Therefore, this action is not subject to the requirements of 

section 203 of the UMRA.

E. Executive Order 13132: Federalism 

The final rule amendments and confidential determinations 

to Part 98 do not have federalism implications. They 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. These amendments and confidentiality determinations apply 

directly to facilities that supply certain products that would 

result in GHGs when released, combusted or oxidized and 

facilities that directly emit greenhouses gases. They do not 

apply to governmental entities unless the government entity owns 

a facility that directly emits GHGs above threshold levels, so 
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relatively few government facilities would be affected. This 

regulation also does not limit the power of states or localities 

to collect GHG data and/or regulate GHG emissions. Thus, 

Executive Order 13132 does not apply to this action.

Although section 6 of Executive Order 13132 does not apply 

to this action, the EPA did consult with state and local 

officials or representatives of state and local governments in 

developing subparts A on October 30, 2009; subpart TT 

promulgated on July 12, 2010; subpart W promulgated on November 

30, 2010; and subpart L promulgated on December 1, 2010. A 

summary of the EPA’s consultations with state and local 

governments is provided in Section VIII.E of the preamble to the 

2009 final rule.

F. Executive Order 13175: Consultation and Coordination with 

Indian Tribal Governments

This action does not have tribal implications, as specified 

in Executive Order 13175 (65 FR 67249, November 9, 2000). This 

final rule, which finalizes several corrections to specific 

provisions in subparts A, TT, W, and L to provide greater 

clarity and flexibility to facilities subject to reporting in 

2012 and finalizes confidentiality determinations for amended 

subpart L reporting requirements, will not increase the burden 

associated with the current requirements of 40 CFR part 98. 

Thus, Executive Order 13175 does not apply to this action.
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G. Executive Order 13045: Protection of Children from 

Environmental Health Risks and Safety Risks

The EPA interprets Executive Order 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 Executive Order has the 

potential to influence the regulation. This action is not 

subject to Executive Order 13045 because it does not establish 

an environmental standard intended to mitigate health or safety 

risks.

H. Executive Order 13211: Actions 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 No. 104-113 (15 

U.S.C. 272 note) directs the 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 
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consensus standards bodies. NTTAA directs the EPA to provide 

Congress, through OMB, explanations when the EPA decides not to 

use available and applicable voluntary consensus standards. The 

final rule amendments do not involve technical standards. 

Therefore, the 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 12898 (59 FR 7629, February 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. 

The EPA has determined that the final rule amendments and 

confidentiality determinations 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 
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environment because it is a rule addressing information 

collection and reporting procedures.

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 (SBREFA), 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. 

The 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 in the Federal Register. A major 

rule cannot take effect until 60 days after it is published in 

the Federal Register. This action is not a “major rule” as 

defined by 5 U.S.C. 804(2). This final rule is effective on 

[INSERT THE DATE OF PUBLICATION OF THIS FINAL RULE IN THE 

FEDERAL REGISTER], except for the amendments to 98.3(c)(4) (the 

subpart A amendments that affect subpart I) and the 

confidentiality determinations for subpart L, which are 

effective on [INSERT THE DATE 30 DAYS AFTER PUBLICATION OF THIS 

FINAL RULE IN THE FEDERAL REGISTER].
2012 Technical Corrections, Clarifying and Other Amendments to the

Greenhouse Gas Reporting Rule, and Confidentiality Determinations for 

Certain Data Elements of the Fluorinated Gas Source Category

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List of Subjects in 40 CFR Part 98

Environmental protection, Administrative practice and 

procedure, Greenhouse gases, Suppliers, Reporting and 

recordkeeping requirements.

____________________________

Dated:

____________________________

Lisa P. Jackson,

Administrator.
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For the reasons stated in the preamble, title 40, chapter 

I, of the Code of Federal Regulations is amended as follows:

PART 98—[AMENDED]

1. The authority citation for part 98 continues to read 

as follows:

Authority: 42 U.S.C. 7401 et seq.

Subpart A—[Amended]

2. Section 98.3 is amended by:

a. Revising paragraph (c)(4) introductory text.

b. Revising paragraph (c)(4)(i).

c. Revising paragraph (c)(4)(iii)(E).

d. Adding paragraph (c)(4)(iii)(F).

e. Revising paragraph (c)(4)(vi).

The revisions read as follows:

§98.3 What are the monitoring, reporting, recordkeeping and 

verification requirements of this part? 

* * * * *

(c) * * *

(4) For facilities, except as otherwise provided in 

paragraph (c)(12) of this section, report annual emissions of 

CO2, CH4, N2O, each fluorinated GHG (as defined in §98.6), and 

each fluorinated heat transfer fluid (as defined in §98.98) as 

follows.
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(i) Annual emissions (excluding biogenic CO2) aggregated for 

all GHG from all applicable source categories, expressed in 

metric tons of CO2e calculated using Equation A–1 of this 

subpart. For electronics manufacturing (as defined in §98.90), 

starting in reporting year 2012 the CO2e calculation must include 

each fluorinated heat transfer fluid (as defined in §98.98) 

whether or not it is also a fluorinated GHG.

* * * * *

(iii) * * *

(E) Each fluorinated GHG (as defined in §98.6), including 

those not listed in Table A–1 of this subpart.

(F) For electronics manufacturing (as defined in §98.90), 

each fluorinated heat transfer fluid (as defined in §98.98) that 

is not also a fluorinated GHG as specified under (c)(4)(iii)(E). 

This requirement applies beginning in reporting year 2012.

* * * * *

(vi) When applying paragraph (c)(4)(i) of this section to 

fluorinated GHGs and fluorinated heat transfer fluids, calculate 

and report CO2e for only those fluorinated GHGs and fluorinated 

heat transfer fluids listed in Table A–1 of this subpart.

* * * * *

3. Table A-7 to subpart A of part 98 is amended by 

revising the entries for subpart L to read as follows:
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Table A-7 to Subpart A of Part 98--Data Elements that Are Inputs 

to Emission Equations and for Which the Reporting Deadline Is 

March 31, 2015

Subpart Rule Citation (40 CFR part 98)

Specific data elements for 

which reporting date is March 

31, 2015 (“All” means all 

data elements in the cited 

paragraph are not required to 

be reported until March 31, 

2015)

* * * * * * *

L 98.126(b)(1) Only data used in 

calculating the absolute 

errors and data used in 

calculating the relative 

errors.

L 98.126(b)(2) All.

L 98.126(b)(6) Only mass of each 

fluorine-containing 

reactant fed into the 

process.

L 98.126(b)(7) Only mass of each 

fluorine-containing 

product produced by the 

process.

L 98.126(b)(8)(i) Only mass of each 

fluorine-containing 

product that is removed 

from the process and fed 

into the destruction 

device.

L 98.126(b)(8)(ii) Only mass of each 

fluorine-containing byproduct that is removed 

from the process and fed 

into the destruction 

device.

L 98.126(b)(8)(iii) Only mass of each 

fluorine-containing 

reactant that is removed 

from the process and fed 

into the destruction 

device.
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Subpart Rule Citation (40 CFR part 98)

Specific data elements for 

which reporting date is March 

31, 2015 (“All” means all 

data elements in the cited 

paragraph are not required to 

be reported until March 31, 

2015)

L 98.126(b)(8)(iv) Only mass of each 

fluorine-containing byproduct that is removed 

from the process and 

recaptured.

L 98.126(b)(8)(v) All.

L 98.126(b)(9)(i) All.

L 98.126(b)(9)(ii) All.

L 98.126(b)(9)(iii) All.

L 98.126(b)(10) All.

L 98.126(b)(11) All.

L 98.126(b)(12) All.

L 98.126(c)(1) Only quantity of the 

process activity used to 

estimate emissions.

L 98.126(c)(2) All.

L 98.126(d) Only estimate of missing 

data.

L 98.126(f)(1) All.

L 98.126(g)(1) All.

L 98.126(h)(2) All.

* * * * * * *

Subpart L—[Amended]

4. Section 98.126 is amended by:

a. Revising paragraph (a) introductory text.

b. Revising paragraph (a)(5).

c. Adding paragraph (j).

The revisions read as follows:

§98.126 Data reporting requirements.
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(a) All facilities. In addition to the information required 

by §98.3(c), you must report the information in paragraphs 

(a)(2) through (a)(6) of this section according to the schedule 

in paragraph (a)(1) of this section, except as otherwise 

provided in paragraph (j) of this section or in §98.3(c)(4)(vii) 

and Table A-7 of Subpart A of this part.

* * * * *

(5) The methods used to determine the mass emissions of 

each fluorinated GHG, i.e., mass balance, process-vent-specific 

emission factor, or process-vent-specific emission calculation 

factor, at the facility. If you use the process-vent-specific 

emission factor or process-vent-specific emission calculation 

factor method, report the methods used to estimate emissions 

from equipment leaks.

* * * * *

(j) Special provisions for reporting years 2011 and 2012 

only. For reporting years 2011 and 2012, the owner or operator 

of a facility must comply with paragraphs (j)(1), (j)(2), and 

(j)(3) of this section.

(1) Timing. The owner or operator of a facility is not 

required to report the data elements at §98.3(c)(4)(iii) and 

§98.126(a)(2), (a)(3), (a)(4), (a)(6), (b), (c), (d), (e), (f), 

(g), and (h) of this section until the later of March 31, 2014 
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or the date set forth for that data element at §98.3(c)(4)(vii) 

and Table A-7 of Subpart A of this part.

(2) Excess emissions. Excess emissions of fluorinated GHGs 

resulting from destruction device malfunctions must be reflected 

in the reported facility-wide CO2e emissions but are not required 

to be reported separately.

(3) Calculation and reporting of CO2e. You must report the 

total fluorinated GHG emissions covered by this subpart, 

expressed in metric tons of CO2e. This includes emissions from 

all fluorinated gas production processes, all fluorinated gas 

transformation processes that are not part of a fluorinated gas 

production process, all fluorinated gas destruction processes 

that are not part of a fluorinated gas production process or a 

fluorinated gas transformation process, and venting of residual 

fluorinated GHGs from containers returned from the field. To 

convert fluorinated GHG emissions to CO2e for reporting under 

this section, use Equation A-1 of §98.2. For fluorinated GHGs 

whose GWPs are not listed in Table A-1 of Subpart A of this 

part, use either the default GWP specified below or your best 

estimate of the GWP based on the information described in 

§98.123(c)(1)(vi)(A)(3). Use of quantitative structure activity 

relationships (QSARs) is an acceptable method for determining 

GWPs in situations where pure standards of the “target” 

fluorinated GHG are not available, the “target” fluorinated GHG 
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cannot be isolated from gas streams, and FTIR spectra for the 

impurities are not available.

(i) If you choose to use a default GWP rather than your 

best estimate of the GWP for fluorinated GHGs whose GWPs are not 

listed in Table A-1 to this subpart, use a default GWP of 10,000 

for fluorinated GHGs that are fully fluorinated GHGs and use a 

default GWP of 2000 for other fluorinated GHGs.

(ii) Provide the total annual emissions across fluorinated 

GHGs for the entire facility, in metric tons of CO2e, that were 

calculated using the default GWP of 2000.

(iii) Provide the total annual emissions across fluorinated 

GHGs for the entire facility, in metric tons of CO2e, that were 

calculated using the default GWP of 10,000.

(iv) Provide the total annual emissions across fluorinated 

GHGs for the entire facility, in metric tons of CO2e, that were 

calculated using your best estimate of the GWP.

5. Section 98.127 is amended by:

a. Revising the introductory text.

b. Adding paragraph (k).

The revisions read as follows:

§98.127 Records that must be retained.

In addition to the records required by §98.3(g), you must retain 

the dated records specified in paragraphs (a) through (k) of 

this section, as applicable.
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* * * * *

(k) For fluorinated GHGs whose GWPs are not listed in Table 

A-1 to subpart A of this part, maintain records of the GWPs used 

to calculate facility-wide CO2e emissions under §98.127(j). 

Where you used your best estimate of the GWP, maintain records 

of the data and analysis used to develop that GWP, including the 

data elements at §98.123(c)(1)(vi)(A)(1)-(3). If you have used 

QSARs to estimate the GWP, include information documenting the 

level of accuracy of the QSAR-derived GWP, including information 

on how the structure of the “target” fluorinated GHG is similar 

to the structures of the fluorinated GHGs used to model the 

radiative forcing and/or reaction rate of the “target” 

fluorinated GHG, the quality and quantity of the measurements of 

the radiative forcings and/or reaction rates of the fluorinated 

GHGs used to model these parameters for the “target” fluorinated 

GHG, any estimated uncertainties of the modeled forcings and/or 

reaction rates, and descriptions and results of any efforts to 

validate the QSAR model(s). 

6. Section 98.128 is amended by adding the definition of 

“Fully fluorinated GHGs” in alphabetical order to read as 

follows:

§98.128 Definitions. 

* * * * *
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Fully fluorinated GHGs means fluorinated GHGs that contain 

only single bonds and in which all available valence locations 

are filled by fluorine atoms. This includes but is not limited 

to saturated perfluorocarbons, SF6, NF3, SF5CF3, fully fluorinated 

linear, branched and cyclic alkanes, fully fluorinated ethers, 

fully fluorinated tertiary amines, fully fluorinated 

aminoethers, and perfluoropolyethers. 

* * * * *

Subpart W—[Amended]

7. Section 98.233 is amended by:

a. In paragraph (e)(5), revising Equation W-6.

b. Revising paragraph (f)(1) introductory text, Equation W7, and the definitions of parameters “Tp” and “FRp” in Equation 

W-7.

c. Revising paragraph (f)(1)(i) introductory text and 

paragraph (f)(1)(i)(A).

d. In paragraph (f)(2), revising Equation W-8 and the 

definitions of parameters “SPp”, “Vp”, and “HRp,q” in Equation W8.

e. Revising paragraph (f)(3) introductory text, Equation W9, and the definitions of parameters “W”, “Vp”, and “HRp,q” in 

Equation W-9.

f. In paragraph (g), revising Equations W-10A and W-10B and 

the definitions of “FRM”, “PRp”, “EnFp”, “SGp”, and “FVp”. 
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g. Revising paragraph (g)(1) introductory text. 

h. In paragraph (g)(1)(ii), revising Equations W-11A and W11B, and revising the definitions of parameters “FR” and “A” in 

both Equations W-11A and W-11B.

i. In paragraph (g)(1)(iii), revising Equation W-12 and the 

definitions of parameters “FRM”, “FRp”, and “PRp”; removing the 

definition of “W”; and adding the definition of parameter “N.” 

j. Revising paragraph (g)(3)(i).

k. In paragraph (h), revising the definition of parameter 

“Es,n” in Equation W-13. 

l. In paragraph (i)(3), revising the definition of 

parameter “ES,N” in Equation W-14A, revising Equation W-14B, and 

the definition of parameter “Ta” in Equation W-14B.

m. Revising paragraph (j)(5) introductory text and the 

definition of parameters “Count” and “1,000” in Equation W-15.

n. In paragraph (l)(3), revising the definition of 

parameter “PR” in Equation W-17B.

o. Removing and reserving paragraph (n)(7).

p. In paragraph (o)(5), revising Equation W-23 and the 

definition of parameter “Es,i”.

q. In paragraph (o)(6), revising Equation W-24 and the

definitions of parameters “MTm,p” and “m”.

r. In paragraph (o)(7), revising the definition of “EFi” in 

Equation W-25.
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s. In paragraph (p)(7) introductory text, revising Equation 

W-27 and revising the definition of parameters “Es,i” in Equation 

W-27.

t. In paragraph (p)(7)(i) introductory text, revising 

Equation W-28 and the definitions of parameters “MTm,p” and “m”.

u. Revising paragraph (r)(2) introductory text.

v. Revising paragraph (r)(6)(ii) introductory text.

w. Revising paragraph (t) introductory text, paragraph 

(t)(1) introductory text, and the definition of parameters “Es,n” 

and “Ea,n” in Equation W-33.

x. In paragraph (v), revising the definition of “ρi” in 

Equation W-36.

y. In paragraph (z)(2)(iii), revising the definition of 

“ECO2” in Equations W-39A and W-39B. 

z. In paragraph (z)(2)(vi), revising the definition of 

parameter “HHV” in Equation W-40.

The revisions read as follows:

§98.233 Calculating GHG emissions.

* * * * *

(e) * * *

(5) * * *

Es,n = (H*D2*P*P2*%G*N) (Eq. W-6)

(4*P1*100)

Where:
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Es,n = Annual natural gas emissions at standard 

conditions in cubic feet. 

H = Height of the dehydrator vessel (ft). 

D = Inside diameter of the vessel (ft). 

P1 = Atmospheric pressure (psia). 

P2 = Pressure of the gas (psia). 

P = pi (3.14).

%G = Percent of packed vessel volume that is gas. 

N = Number of dehydrator openings in the calendar 

year.

100 = Conversion of %G to fraction.

* * * * *

(f) * * *

(1) Calculation Methodology 1. For at least one well of 

each unique well tubing diameter group and pressure group 

combination in each sub-basin category (see §98.238 for the 

definitions of tubing diameter group, pressure group, and subbasin category), where gas wells are vented to the atmosphere to 

expel liquids accumulated in the tubing, a recording flow meter 

shall be installed on the vent line used to vent gas from the 

well (e.g., on the vent line off the wellhead separator or 

atmospheric storage tank) according to methods set forth in 

§98.234(b). Calculate emissions from well venting for liquids 

unloading using Equation W-7 of this section.





h

p

Ea n TpFR

1

, (Eq. W-7)

* * * * *
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Tp = Cumulative amount of time in hours of venting 

for each well, p, of the same tubing diameter 

group and pressure group combination in a subbasin during the year.

FR = Average flow rate in cubic feet per hour for 

all measured wells venting for the duration of 

the liquids unloading, under actual conditions 

as determined in paragraph (f)(1)(i) of this 

section.

(i) Determine the well vent average flow rate as specified 

under paragraph (f)(1)(i) of this section for at least one well 

in a unique well tubing diameter group and pressure group 

combination in each sub-basin category.

(A) The average flow rate per hour of venting is calculated 

for each unique tubing diameter group and pressure group 

combination in each sub-basin category by dividing the recorded 

total flow by the recorded time (in hours) for all measured 

liquid unloading events with venting to the atmosphere. 

* * * * *

(2) * * *

       

 















         

W

p

V

q

s n p p p p p p q p q

p

E V CD WD SP SFR HR Z

1 1

, ,

3 2

, 0.37 10 1.0

(Eq. W-8)

* * * * *

SPp = For each well, p, shut-in pressure or surface 

pressure for wells with tubing production or 

casing pressure for each well with no packers 

in pounds per square inch absolute (psia); or 

casing-to-tubing pressure ratio of one well 

with no packer from the same sub-basin 

multiplied by the tubing pressure of each 
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well, p, in the sub-basin, in pounds per 

square inch absolute (psia).

Vp = Number of unloading events per year per well, 

p.

* * * * *

HRp,q = Hours that each well, p, was left open to the 

atmosphere during each unloading event, q. 

* * * * *

(3) Calculation Methodology 3. Calculate emissions from 

well venting to the atmosphere for liquids unloading with 

plunger lift assist using Equation W-9 of this section.

       

 















         

W

p

V

q

s n p p p p p p q p q

p

E V TD WD SP SFR HR Z

1 1

, ,

3 2

, 0.37 10 0.5

(Eq. W-9)

* * * * *

W = Total number of wells with plunger lift assist 

and well venting for liquids unloading for 

each sub-basin.

* * * * *

Vp = Number of unloading events per year for each 

well, p.

* * * * *

HRp,q = Hours that each well, p, was left open to the 

atmosphere during each unloading event, q.

* * * * *

(g) * * *

 



    

W

p

s n p s s p s p s p E T FRM PR EnF SG

1

, , , ,

(Eq. W-10A)
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 



 

W

p

Es n FVs p EnFs p

1

, , ,

(Eq. W-10B)

* * * * *

FRMs = Ratio of flowback during well completions and 

workovers from hydraulic fracturing to 30-day 

production rate from Equation W-12.

PRs,p = First 30-day average production flow rate in 

standard cubic feet per hour of each well p, 

as required in paragraph (g)(1) of this 

section.

EnFs,p = Volume of CO2 or N2 injected gas in cubic feet 

at standard conditions that was injected into 

the reservoir during an energized fracture job 

for each well p. If the fracture process did 

not inject gas into the reservoir, then EnFs,p

is 0. If injected gas is CO2 then EnFs,p is 0.

SGs,p = Volume of natural gas in cubic feet at 

standard conditions that was recovered into a 

flow-line for well p as per paragraph (g)(3) 

of this section. This parameter includes any 

natural gas that is injected into the well for 

clean-up. If no gas was recovered, SGs,p is 0.

FVs,p = Flow volume of each well (p) in standard cubic 

feet measured using a recording flow meter 

(digital or analog) on the vent line to 

measure flowback during the completion or 

workover according to methods set forth in 

§98.234(b).

(1) The average flow rate for flowback during well 

completions and workovers from hydraulic fracturing shall be 

determined using measurement(s) for Calculation Methodology 1 or 

calculation(s) for Calculation Methodology 2 described in this 

paragraph (g)(1) of this section. If Equation W-10A is used, the 

number of measurements or calculations shall be determined per 
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sub-basin and well type (horizontal or vertical) as follows: at 

least one measurement or calculation for less than or equal to 

25 completions or workovers; at least two measurements or 

calculations for 26 to 50 completions or workovers; at least

three measurements or calculations for 51 to 100 completions or 

workovers; at least four measurements or calculations for 101 to 

250 completions or workovers; and at least five measurements or

calculations for greater than 250 completions or workovers.

* * * * * 

(ii) * * *

































 















 

1.758

1

2

1.515

1

5 2

1.27 10 * * 3430* *

P

P

P

P

FRa A Tu

(Eq. W-11A)

Where:

FRa = Average flow rate in cubic feet per hour, 

under actual subsonic flow conditions.

A = Cross sectional open area of the restriction 

orifice (m2).

* * * * *

FRa A Tu1.27 10 * * 187.08*

5

 

(Eq. W-11B)

Where:

FRa = Average flow rate in cubic feet per hour, 

under actual sonic flow conditions.

A = Cross sectional open area of the restriction 

orifice (m2).

* * * * *

(iii) * * *
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







 N

p

s p

N

p

s p

s

PR

FR

FRM

1

,

1

,

(Eq. W-12)

Where:

FRMs = Ratio of flowback rate during well completions 

and workovers from hydraulic fracturing to 30-

day production rate.

FRs,p = Measured flowback rate from Calculation 

Methodology 1 described in paragraph (g)(1)(i) 

of this section or calculated flow rate from 

Calculation Methodology 2 described in 

paragraph (g)(1)(ii) of this section in 

standard cubic feet per hour for well(s) p for 

each sub-basin and well type (horizontal or 

vertical) combination. Measured and calculated 

FRa values shall be converted from actual 

conditions (FRa) to standard conditions (FRs,p) 

for each well p using Equation W-33 in 

paragraph (t) of this section. You may not use 

flow volume as used in Equation W-10B 

converted to a flow rate for this parameter.

PRs,p = First 30-day production rate in standard cubic 

feet per hour for each well p that was 

measured in the sub-basin and well type 

combination.

N = Number of measured or calculated well 

completions or workovers using hydraulic 

fracturing in a sub-basin and well type 

combination.

* * * * *

(3) * * *

(i) Use the factor SGs,P in Equation W-10A of this section, 

to adjust the emissions estimated in paragraphs (g)(1) through 

(g)(4) of this section by the magnitude of emissions captured 

using purpose designed equipment that separates saleable gas 
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from the flowback as determined by engineering estimate based on 

best available data.

* * * * *

(h) * * *

* * * * *

Es,n = Annual natural gas emissions in standard cubic 

feet from gas well venting during well 

completions and workovers without hydraulic 

fracturing.

* * * * *

(i) * * *

(3) * * *

* * * * *

Es,n = Annual natural gas venting emissions at 

standard conditions from blowdowns in cubic 

feet.

* * * * *

      

































 



N

p a p s

s a b p a e p

s n

T P

T P P

E V

1 ,

, , , ,

,

459.67

459.67

(Eq. W-14B)

* * * * *

Ta,p = Temperature at actual conditions in the unique 

physical volume (oF) for each blowdown “p”.

* * * * *

(j) * * *

(5) Calculation Methodology 5. For well pad gas-liquid 

separators and for wells flowing off a well pad without passing 
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through a gas-liquid separator with annual average daily 

throughput of oil less than 10 barrels per day use Equation W-15 

of this section:

* * * * *

Count = Total number of separators or wells with 

annual average daily throughput less than 10 

barrels per day. Count only separators or 

wells that feed oil directly to the storage 

tank.

1,000 = Conversion from thousand standard cubic feet 

to standard cubic feet.

* * * * *

(l) * * *

(3) * * *

* * * * *

PR = Average annual production rate in actual cubic 

feet per day for the gas well(s) being tested. 

* * * * *

(o) * * *

(5) * * *

E s i m EF m Tm GHG i* * , ,  (Eq. W-23)

* * * * *

Es,i,m = Annual total volumetric GHG emissions at 

standard conditions from each centrifugal 

compressor for mode-source combination m, in 

cubic feet.

* * * * *

(6) * * * 
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m

Count

p

m p

m

Count

MT

EF

m





1

,

(Eq. W-24)

* * * * *

MTm,p = Flow measurements from all centrifugal 

compressor sources in each mode-source 

combination, m, for each measured compressor, 

p, in standard cubic feet per hour. 

m = Compressor mode-source combination as listed 

in paragraph (o)(1)(i) through (o)(1)(iii).

* * * * *

(7) * * *

Where:

EFi = Emission factor for GHGi. Use 1.2 x 107

standard cubic feet per year per compressor 

for CH4 and 5.30 x 105 standard cubic feet per 

year per compressor for CO2 at 60°F and 14.7 

psia.

* * * * *

(p) * * *

(7) * * *

Es i m EFm Tm GHG i* * , ,  (Eq. W-27)

* * * * *

Es,i,m = Annual total volumetric GHG emissions at 

standard conditions from each reciprocating 

compressor for mode-source combination m, in 

cubic feet.

(i) * * *
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m

p

m p

m

Count

MT

EF





Countm

1

,

(Eq. W-28)

* * * * *

MTm,p = Flow measurements from all reciprocating 

compressor sources in each mode-source 

combination, m, for each measured compressor, 

p, in standard cubic feet per hour. 

m = Compressor mode-source combination as listed 

in (p)(1) through (p)(3).

* * * * *

(r) * * *

(2) Onshore petroleum and natural gas production facilities 

shall use the appropriate default population emission factors 

listed in Table W-1A of this subpart for equipment leaks from 

valves, connectors, open ended lines, pressure relief valves, 

pump, flanges, and other. Major equipment and components 

associated with gas wells are considered gas service components 

in reference to Table W-1A of this subpart and major natural gas 

equipment in reference to Table W-1B of this subpart. Major 

equipment and components associated with crude oil wells are 

considered crude service components in reference to Table W-1A 

of this subpart and major crude oil equipment in reference to 

Table W-1C of this subpart. Where facilities conduct EOR 

operations the emissions factor listed in Table W-1A of this 

subpart shall be used to estimate all streams of gases, 
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including recycle CO2 stream. The component count can be 

determined using either of the methodologies described in this 

paragraph (r)(2). The same methodology must be used for the 

entire calendar year.

* * * * *

(6) * * *

(ii) Emissions from all above grade metering-regulating 

stations (including above grade TD transfer stations) shall be 

calculated by applying the emission factor calculated in 

Equation W-32 and the total count of meter/regulator runs at all 

above grade metering-regulating stations (inclusive of TD 

transfer stations) to Equation W-31. The facility wide emission 

factor in Equation W-32 will be calculated by using the total 

volumetric GHG emissions at standard conditions for all 

equipment leak sources calculated in Equation W-30B in paragraph 

(q)(8) of this section and the count of meter/regulator runs 

located at above grade transmission-distribution transfer 

stations that were monitored over the years that constitute one 

complete cycle as per paragraph (q)(8)(i) of this section. A 

meter on a regulator run is considered one meter/regulator run. 

Reporters that do not have above grade T-D transfer stations 

shall report a count of above grade metering-regulating stations 

only and do not have to comply with §98.236(c)(16)(xix).

* * * * *
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(t) Volumetric emissions. If equation parameters in §98.233 

are already at standard conditions, which results in volumetric 

emissions at standard conditions, then this paragraph does not 

apply. Calculate volumetric emissions at standard conditions as 

specified in paragraphs (t)(1) or (2) of this section, with 

actual pressure and temperature determined by engineering 

estimates based on best available data unless otherwise 

specified. 

(1) Calculate natural gas volumetric emissions at standard 

conditions using actual natural gas emission temperature and 

pressure, and Equation W-33 of this section for conversions of 

Ea,n or conversions of FRa (whether sub-sonic or sonic). 

* * * * *

Es,n = Natural gas volumetric emissions at standard 

temperature and pressure (STP) conditions in 

cubic feet, except Es,n equals FRs,p for each 

well p when calculating either subsonic or 

sonic flowrates under 98.233(g).

Ea,n = Natural gas volumetric emissions at actual 

conditions in cubic feet, except Ea,n equals 

FRa,p for each well p when calculating either 

subsonic or sonic flowrates under 98.233(g).

* * * * *

(v) * * *

* * * * *

= Density of GHGi. Use 0.0526 kg/ft3 for CO2 and 

N2O, and 0.0192 kg/ft3 for CH4 at 60°F and 14.7 

psia .

 i
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* * * * *

(z) * * *

(2) * * *

(iii) * * *

* * * * *

Ea,CO2 = Contribution of annual CO2 emissions from 

portable or stationary fuel combustion sources 

in cubic feet, under actual conditions.

* * * * *

(vi) * * *

* * * * *

HHV = For the higher heating value for field gas or 

process vent gas, use 1.235 x 10-3 mmBtu/scf 

for HHV.

* * * * *

8. Section 98.236 is amended by:

a. Revising paragraph (c)(5)(ii)(D).

b. Revising paragraph (c)(9) introductory text.

c. Revising paragraphs (c)(13)(i)(G), (c)(13)(ii)(C), 

(c)(13)(iii)(C), (c)(13)(iv), and (c)(13)(v)(B).

d. Revising paragraphs (c)(14)(i)(C), (c)(14)(ii)(C), 

(c)(14)(iii)(C), (c)(14)(iv), and (c)(14)(v)(B).

e. Revising paragraphs (c)(15)(i)(B), (c)(15)(i)(C), and 

(c)(15)(ii)(A).

f. Revising paragraph (c)(17)(v). 

The revisions read as follows: 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

§98.236 Data reporting requirements.

* * * * *

(c) * * *

* * * * *

(5) * * *

(ii) * * *

(D) Average internal casing diameter, in inches, for all 

wells, where applicable. 

* * * * *

(9) For transmission tank emissions identified in 

§98.233(k) from scrubber dump valves report the following:

* * * * *

(13) * * *

(i) * * *

(G) Report seal oil degassing vent emissions for 

compressors measured and for compressors not measured in metric 

tons of CO2e for each gas.

(ii) * * *

(C) Report blowdown vent emissions when in operating mode 

in metric tons of CO2e for each gas.

(iii)* * *

(C) Report the isolation valve leakage emissions in not 

operating, depressurized mode in metric tons of CO2e for each 

gas. 
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

(iv) Report total annual compressor emissions from all 

modes of operation in metric tons of CO2e for each gas.

(v) * * *

(B) Report annual emissions in metric tons of CO2e for each 

gas (refer to Equation W–25 of §98.233) collectively.

(14) * * *

(i) * * *

(C) Report rod packing emissions for compressors measured 

and for compressors not measured in metric tons of CO2e for each 

gas.

(ii) * * * 

(C) Report blowdown vent emissions when in operating and 

standby pressurized modes in metric tons of CO2e for each gas.

(iii) * * *

(C) Report isolation valve leakage emissions in not 

operating, depressurized mode in metric tons of CO2e for each 

gas.

(iv) Report total annual compressor emissions from all 

modes of operation in metric tons of CO2e for each gas.

(v) * * *

(B) Report annual emissions in metric tons of CO2e for each 

gas collectively (refer to Equation W–29 of §98.233).

(15) * * *

(i) * * *
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

(B) For onshore natural gas processing, range of 

concentrations of CH4 and CO2 (refer to Equation W-30A of 

§98.233).

(C) Annual CO2 and CH4 emissions in metric tons CO2e for 

each gas (refer to Equation W-30A of §98.233), by component 

type.

(ii) * * *

(A) For source categories §98.230(a)(5), (a)(6), and 

(a)(7), total count for each component type in Tables W-4, W-5, 

and W-6 of this subpart for which there is a population emission 

factor, listed by major heading and component type.

* * * * *

(17) * * *

(v) For each EOR pump, report annual CO2 emissions, 

expressed in metric tons CO2e for each gas.

* * * * *

9. Table A-1A of Subpart W of part 98 is revised to read 

as follows: 

Table W-1A of Subpart W–Default Whole Gas Emission Factors for 

Onshore Petroleum and Natural Gas Production

Onshore petroleum and natural gas production Emission Factor 

(scf/hour/component)

Eastern U.S.

Population Emission Factors - All Components, Gas Service1

Valve 0.027

Connector 0.003

Open-ended Line 0.061

Pressure Relief Valve 0.040

Low Continuous Bleed Pneumatic Device Vents2 1.39
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

Onshore petroleum and natural gas production Emission Factor 

(scf/hour/component)

High Continuous Bleed Pneumatic Device Vents2 37.3

Intermittent Bleed Pneumatic Device Vents2 13.5

Pneumatic Pumps3 13.3

Population Emission Factors - All Components, Light Crude Service4

Valve 0.05

Flange 0.003

Connector 0.007

Open-ended Line 0.05

Pump 0.01

Other5 0.30

Population Emission Factors - All Components, Heavy Crude Service6

Valve 0.0005

Flange 0.0009

Connector (other) 0.0003

Open-ended Line 0.006

Other5 0.003

Western U.S.

Population Emission Factors - All Components, Gas Service1

Valve 0.121

Connector 0.017

Open-ended Line 0.031

Pressure Relief Valve 0.193

Low Continuous Bleed Pneumatic Device Vents2 1.39

High Continuous Bleed Pneumatic Device Vents2 37.3

Intermittent Bleed Pneumatic Device Vents2 13.5

Pneumatic Pumps3 13.3

Population Emission Factors - All Components, Light Crude Service4

Valve 0.05

Flange 0.003

Connector (other) 0.007

Open-ended Line 0.05

Pump 0.01

Other5 0.30

Population Emission Factors - All Components, Heavy Crude Service6

Valve 0.0005

Flange 0.0009

Connector (other) 0.0003

Open-ended Line 0.006

Other5 0.003

1 For multi-phase flow that includes gas, use the gas service emissions 

factors

2 Emission Factor is in units of "scf/hour/device"

3 Emission Factor is in units of "scf/hour/pump"

4 Hydrocarbon liquids greater than or equal to 20 ̊API are considered "light 

crude"
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2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

Onshore petroleum and natural gas production Emission Factor 

(scf/hour/component)

5 ”Others” category includes instruments, loading arms, pressure relief 

valves, stuffing boxes, compressor seals, dump lever arms, and vents.

6 Hydrocarbon liquids less than 20 ̊API are considered "heavy crude"

10. Table W-5 of Subpart W of part 98 is amended by 

revising the entry for “Vapor Recovery Compressor” to read as 

follows: 

Table W-5 of Subpart W–Default Methane Emission Factors for 

Liquefied Natural Gas (LNG) Storage

LNG Storage Emission Factor 

(scf/hour/component)

* * * * * * *

Vapor Recovery Compressor2 4.17

Subpart TT—[Amended]

11. Section 98.460 is amended by adding paragraph 

(c)(2)(xiii) to read as follows:

§98.460 Definition of source category.

* * * * *

(c) * * *

(2) * * *

(xiii) Other waste material that has a DOC value of 0.3 

weight percent (on a wet basis) or less. DOC value must be 

determined using a 60-day anaerobic biodegradation test 

procedure identified in §98.464(b)(4)(i)(A).

12. Section 98.464(b) is amended to read as follows:

§98.464 Monitoring and QA/QC Requirements.
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* * * * *

(b) For each waste stream placed in the landfill during the 

reporting year for which you choose to determine volatile solids 

concentration for the purposes of §98.460(c)(2)(xii) or choose 

to determine a landfill-specific DOCx for use in Equation TT-1 

of this subpart or for the purposes of §98.460(c)(2)(xiii) of 

this subpart, you must collect and test a representative sample 

of that waste stream using the methods specified in paragraphs 

(b)(1) through (b)(4) of this section.