MEMORANDUM

To: Docket # EPA-HQ-OAR-2011-0512

From: Mark de Figueiredo, EPA/CCD

Date: November 10, 2014

Subject: Final Revisions to the Subpart W Reporting Requirements in the “Greenhouse Gas 

Reporting Rule: 2014 Revisions and Confidentiality Determinations for Petroleum 

and Natural Gas Systems; Final Rule”

In the notice entitled “Greenhouse Gas Reporting Rule: 2014 Revisions and 

Confidentiality Determinations for Petroleum and Natural Gas Systems; Final Rule,” the EPA is 

finalizing changes to the reporting requirements in the Petroleum and Natural Gas Systems

(subpart W) source category of 40 CFR Part 98. The final amendments change monitoring and 

data reporting requirements, revise calculation methods, clarify certain terms and definitions, and 

correct technical and editorial errors. Specifically, the reporting requirements section of 

subpart W has been re-written to revise the reported data elements to clarify and align more 

closely with the calculation methods and to clearly identify the data that must be reported for 

each source type. 

Table 1 lists all the changes to the subpart W reporting requirements, including the final

and current rule text, and an identification of whether the data element is new, revised, or a 

current reporting requirement. Data elements that are listed as “Current” are those with either 

only minor changes that do not change the underlying data required to be reported in the existing 

data element or data elements that have been deleted. Data elements listed as “Revised” are those 

with substantial revisions to existing reporting requirements. 

1
Table 1. Final Changes to the Subpart W Reporting Requirements

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Natural Gas Pneumatic Device Venting

§98.236(b) (b) You must indicate whether the facility contains 

the following types of equipment: continuous high 

bleed natural gas pneumatic devices, continuous low 

bleed natural gas pneumatic devices, and intermittent 

bleed natural gas pneumatic devices. If the facility

contains any continuous high bleed natural gas 

pneumatic devices, continuous low bleed natural gas 

pneumatic devices, or intermittent bleed natural gas 

pneumatic devices, you must report the information 

specified in paragraphs (b)(1) through (b)(4) of this 

section.

New

§98.236(b)(1)(i) §98.236(c)(1)(i), 

(ii), (iii)

(1) The number of natural gas pneumatic devices as 

specified in paragraphs (b)(1)(i) and (b)(1)(ii) of this 

section.

(i) The total number of devices of each type, 

determined according to §98.233(a)(1) and (a)(2). 

(i) Actual count and estimated 

count separately of natural gas 

pneumatic high bleed devices 

as applicable.

(ii) Actual count and estimated 

count separately of natural gas 

pneumatic low bleed devices 

as applicable.

(iii) Actual count and 

estimated count separately of 

natural gas pneumatic 

intermittent bleed devices as 

applicable.

Current

2
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(b)(1)(ii) and 

(b)(1)(ii)(A)

§98.236(c)(1)(i), (ii), 

(iii)

(ii) If the reported value in paragraph (b)(1)(i) of 

this section is an estimated value determined 

according to §98.233(a)(2), then you must report 

the information specified in paragraphs (b)(1)(ii)(A) 

through (b)(1)(ii)(C) of this section.

(A) The number of devices of each type reported in 

paragraph (b)(1)(i) of this section that are counted.

(i) Actual count and estimated 

count separately of natural gas 

pneumatic high bleed devices 

as applicable.

(ii) Actual count and estimated 

count separately of natural gas 

pneumatic low bleed devices as 

applicable.

(iii) Actual count and estimated 

count separately of natural gas 

pneumatic intermittent bleed 

devices as applicable.

Current

§98.236(b)(1)(ii)(B) §98.236(c)(1)(i), (ii), 

(iii)

(B) The number of devices reported in paragraph 

(b)(1)(i) of this section that are estimated (not 

counted).

(i) Actual count and estimated 

count separately of natural gas 

pneumatic high bleed devices 

as applicable.

(ii) Actual count and estimated 

count separately of natural gas 

pneumatic low bleed devices as 

applicable.

(iii) Actual count and estimated 

count separately of natural gas 

pneumatic intermittent bleed

devices as applicable.

Current

§98.236(b)(1)(ii)(C) (C) Whether the calendar year is the first calendar 

year of reporting or the second calendar year of 

reporting.

New

§98.236(b)(2) (2) For each type of pneumatic device, the 

estimated average number of hours in the calendar

year that the natural gas pneumatic devices reported 

in paragraph (b)(1)(i) of this section were operating 

in the calendar year (“Tt” in Equation W-1 of this 

subpart).

New

3
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(b)(3) §98.236(c)(1)(iv) (3) Annual CO2 emissions, in metric tons CO2, for 

the natural gas pneumatic devices combined, 

calculated using Equation W-1 of this subpart and 

§98.233(a)(4), and reported in paragraph (b)(1)(i) 

of this section.

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for each of the 

following pieces of equipment: 

high bleed pneumatic devices; 

intermittent bleed pneumatic 

devices; low bleed pneumatic 

devices.

Current

§98.236(b)(4) §98.236(c)(1)(iv) (4) Annual CH4 emissions, in metric tons CH4, for 

the natural gas pneumatic devices combined, 

calculated using Equation W-1 of this subpart and 

§98.233(a)(4), and reported in paragraph (b)(1)(i) of 

this section.

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for each of the 

following pieces of equipment: 

high bleed pneumatic devices; 

intermittent bleed pneumatic 

devices; low bleed pneumatic 

devices.

Current

Natural Gas Pneumatic Pump Venting

§98.236(c) (c) You must indicate whether the facility has any 

natural gas driven pneumatic pumps. If the facility 

contains any natural gas driven pneumatic pumps, 

then you must report the information specified in 

paragraphs (c)(1) through (c)(4) of this section.

New

§98.236(c)(1) §98.236(c)(2)(i) (1) Count of natural gas driven pneumatic pumps. Count of natural gas driven 

pneumatic pumps.

Current

§98.236(c)(2) (2) Average estimated number of hours in the 

calendar year the pumps were operational (“T” in 

Equation W-2 of this subpart).

New

4
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(c)(3) §98.236(c)(2)(ii) (3) Annual CO2 emissions, in metric tons CO2, for 

all natural gas driven pneumatic pumps combined, 

calculated according to §98.233(c)(1) and (c)(2).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all natural gas 

driven pneumatic pumps 

combined.

Current

§98.236(c)(4) §98.236(c)(2)(ii) (4) Annual CH4 emissions, in metric tons CH4, for 

all natural gas driven pneumatic pumps combined, 

calculated according to §98.233(c)(1) and (c)(2).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all natural gas 

driven pneumatic pumps 

combined.

Current

Acid Gas Removal

§98.236(d) (d) You must indicate whether your facility has any 

acid gas removal units that vent directly to the 

atmosphere, to a flare or engine, or to a sulfur 

recovery plant. If your facility contains any acid gas 

removal units that vent directly to the atmosphere, 

to a flare or engine, or to a sulfur recovery plant, 

then you must report the information specified in 

paragraphs (d)(1) and (d)(2) of this section.

New

§98.236(d)(1) and 

§98.236(d)(1)(i)

§98.236(c)(3)(vi) (1) You must report the information specified in 

paragraphs (d)(1)(i) through (d)(1)(v) of this section

for each acid gas removal unit.

(i) A unique name or ID number for the acid gas 

removal unit. For the onshore petroleum and natural 

gas production industry segment, a different name 

or ID may be used for a single acid gas removal 

unit for each location it operates at in a given year.

For the onshore natural gas 

processing industry segment 

only, report a unique name or 

ID number for the AGR unit.

Current

5
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(d)(1)(ii) §98.236(c)(3)(i) (ii) Total feed rate entering the acid gas removal 

unit, using a meter or engineering estimate based on 

process knowledge or best available data, in million 

cubic feet per year.

Total throughput off the acid 

gas removal unit using a meter 

or engineering estimate based 

on process knowledge or best 

available data in million cubic 

feet per year.

Revised

§98.236(d)(1)(iii) §98.236(c)(3)(vii) (iii) The calculation method used to calculate CO2

emissions from the acid gas removal unit, as 

specified in §98.233(d).

An indication of which 

calculation methodology was 

used for the AGR.

Current

§98.236(d)(1)(iv) (iv) Whether any CO2 emissions from the acid gas 

removal unit are recovered and transferred outside 

the facility, as specified in §98.233(d)(11). ...

New

§98.236(d)(1)(iv) §98.236(c)(3)(iv) (iv) ... If any CO2 emissions from the acid gas 

removal unit were recovered and transferred outside 

the facility, then you must report the annual 

quantity of CO2, in metric tons CO2, that was 

recovered and transferred outside the facility under 

subpart PP of this part.

Report the annual quantity of 

CO2, expressed in metric tons 

CO2e, that was recovered from 

the AGR unit and transferred 

outside the facility, under 

subpart PP of this part.

Current

§98.236(d)(1)(v) §98.236(c)(3)(v) (v) Annual CO2 emissions, in metric tons CO2, from 

the acid gas removal unit, calculated using any one 

of the calculation methods specified in §98.233(d) 

and as specified in §98.233(d)(10) and (11).

Report annual CO2 emissions 

for the AGR unit, expressed in 

metric tons CO2e.

Current

§98.236(d)(1)(vi) (vi) Sub-basin ID that best represents the wells 

supplying gas to the unit (for the onshore petroleum 

and natural gas production industry segment only).

New

6
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(d)(2)(i) and 

(d)(2)(i)(A)

§98.236(c)(3)(ii) (i) If you used Calculation Method 1 or Calculation 

Method 2 as specified in §98.233(d) to calculate 

CO2 emissions from the acid gas removal unit, then 

you must report the information specified in 

paragraphs (d)(2)(i)(A) and (d)(2)(i)(B) of this 

section.

(A) Annual average volumetric fraction of CO2 in 

the vent gas exiting the acid gas removal unit.

For Calculation Methodology 1 

and Calculation Methodology 2 

of §98.233(d), annual average 

fraction of CO2 content in the 

vent from the acid gas removal 

unit (refer to §98.233(d)(6)).

Current

§98.236(d)(2)(i)(B) (B) Annual volume of gas vented from the acid gas 

removal unit, in cubic feet.

New

§98.236(d)(2)(ii) and 

(d)(2)(ii)(A)

(ii) If you used Calculation Method 3 as specified in 

§98.233(d) to calculate CO2 emissions from the 

acid gas removal unit, then you must report the 

information specified in paragraphs (d)(2)(ii)(A) 

through (d)(2)(ii)(D) of this section. 

(A) Which equation was used: Equation W-4A or 

W-4B.

New

§98.236(d)(2)(ii)(B) §98.236(c)(3)(iii) (B) Annual average volumetric fraction of CO2 in 

the natural gas flowing out of the acid gas removal 

unit, as specified in Equation W-4A or Equation W4B of this subpart.

For Calculation Methodology 3 

of §98.233(d), annual average 

volume fraction of CO2 content 

of natural gas into and out of 

the acid gas removal unit (refer 

to §98.233(d)(7) and (d)(8)).

Current

§98.236(d)(2)(ii)(C) §98.236(c)(3)(iii) (C) Annual average volumetric fraction of CO2

content in natural gas flowing into the acid gas 

removal unit, as specified in Equation W-4A or 

Equation W-4B of this subpart.

For Calculation Methodology 3 

of §98.233(d), annual average 

volume fraction of CO2 content 

of natural gas into and out of 

the acid gas removal unit (refer 

to §98.233(d)(7) and (d)(8)).

Current

7
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(d)(2)(ii)(D) §98.236(c)(3)(i) (D) The natural gas flow rate used, as specified in 

Equation W-4A of this subpart, reported as either 

total annual volume of natural gas flow into the acid 

gas removal unit in cubic feet at actual conditions;

or total annual volume of natural gas flow out of the 

acid gas removal unit, as specified in Equation W4B of this subpart, in cubic feet at actual conditions.

Total throughput off the acid 

gas removal unit using a meter 

or engineering estimate based 

on process knowledge or best 

available data in million cubic 

feet per year.

Current

§98.236(d)(2)(iii)

and (d)(2)(iii)(A)

(iii) If you used Calculation Method 4 as specified 

in §98.233(d) to calculate CO2 emissions from the 

acid gas removal unit, then you must report the 

information specified in paragraphs (d)(2)(iii)(A) 

through (d)(2)(iii)(L) of this section, as applicable 

to the simulation software package used.

(A) The name of the simulation software package 

used.

New

§98.236(d)(2)(iii)(B) (B) Natural gas feed temperature, in degrees 

Fahrenheit.

New

§98.236(d)(2)(iii)(C) (C) Natural gas feed pressure, in pounds per square 

inch.

New

§98.236(d)(2)(iii)(D) §98.236(c)(3)(i) (D) Natural gas flow rate, in standard cubic feet per 

minute.

Total throughput off the acid 

gas removal unit using a meter 

or engineering estimate based 

on process knowledge or best 

available data in million cubic 

feet per year.

Revised

§98.236(d)(2)(iii)(E) (E) Acid gas content of the feed natural gas, in mole 

percent.

New

§98.236(d)(2)(iii)(F) (F) Acid gas content of the outlet natural gas, in 

mole percent.

New

§98.236(d)(2)(iii)(G) (G) Unit operating hours, excluding downtime for 

maintenance or standby, in hours per year.

New

8
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(d)(2)(iii)(H) (H) Exit temperature of the natural gas, in degrees 

Fahrenheit.

New

§98.236(d)(2)(iii)(I) (I) Solvent pressure, in pounds per square inch. New

§98.236(d)(2)(iii)(J) (J) Solvent temperature, in degrees Fahrenheit. New

§98.236(d)(2)(iii)(K) (K) Solvent circulation rate, in gallons per minute. New

§98.236(d)(2)(iii) (L) (L) Solvent weight, in pounds per gallon. New

Dehydrators

§98.236(e) (e) You must indicate whether your facility contains 

any of the following equipment: glycol dehydrators 

with an annual average daily natural gas throughput 

greater than or equal to 0.4 million standard cubic 

feet per day, glycol dehydrators with an annual 

average daily natural gas throughput less than 0.4 

million standard cubic feet per day, and dehydrators 

that use desiccant. If your facility contains any of 

the equipment listed in this paragraph (e), then you 

must report the applicable information in 

paragraphs (e)(1) through (e)(3).

New

§98.236(e)(1) and 

(e)(1)(i)

§98.236(c)(4)(i)(L) (1) For each absorbent dehydrator that has an 

annual average daily natural gas throughput greater 

than or equal to 0.4 million standard cubic feet per 

day (as specified in §98.233(e)(1)), you must report 

the information specified in paragraphs (e)(1)(i) 

through (e)(1)(xviii) of this section for the 

dehydrator.

(i) A unique name or ID number for the dehydrator. 

For the onshore petroleum and natural gas 

production industry segment, a different name or ID 

may be used for a single dehydrator for each 

location it operates at in a given year.

For the onshore natural gas 

processing industry segment 

only, report a unique name or 

ID number for glycol 

dehydrator.

Current

9
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(1)(ii) §98.236(c)(4)(i)(A) (ii) Dehydrator feed natural gas flow rate in million 

standard cubic feet per day, determined by 

engineering estimate based on best available data.

Glycol dehydrator feed natural 

gas flow rate in MMscfd, 

determined by engineering 

estimate based on best 

available data.

Current

§98.236(e)(1)(iii) (iii) Dehydrator feed natural gas water content, in 

pounds per million standard cubic feet.

New

§98.236(e)(1)(iv) (iv) Dehydrator outlet natural gas water content, in 

pounds per million standard cubic feet.

New

§98.236(e)(1)(v) §98.236(c)(4)(i)(B) (v) Dehydrator absorbent circulation pump type 

(e.g., natural gas pneumatic, air pneumatic, or 

electric).

Glycol dehydrator absorbent 

circulation pump type

Current

§98.236(e)(1)(vi) (vi) Dehydrator absorbent circulation rate, in 

gallons per minute.

New

§98.236(e)(1)(vii) §98.236(c)(4)(i)(E) (vii) Type of absorbent (e.g., triethylene glycol 

(TEG), diethylene glycol (DEG), or ethylene glycol 

(EG)).

Type of absorbent. Current

§98.236(e)(1)(viii) §98.236(c)(4)(i)(C) (viii) Whether stripper gas is used in dehydrator. Whether stripper gas is used in 

glycol dehydrator.

Current

§98.236(e)(1)(ix) §98.236(c)(4)(i)(D) (ix) Whether a flash tank separator is used in 

dehydrator.

Whether a flash tank separator 

is used in glycol dehydrator.

Current

§98.236(e)(1)(x) §98.236(c)(4)(i)(F) (x) Total time the dehydrator is operating, in hours. Total time the glycol 

dehydrator is operating in 

hours.

Current

§98.236(e)(1)(xi) §98.236(c)(4)(i)(G) (xi) Temperature of the wet natural gas, in degrees 

Fahrenheit.

Temperature, in degrees 

Fahrenheit and pressure, in 

psig, of the wet natural gas.

Current

§98.236(e)(1)(xii) §98.236(c)(4)(i)(G) (xii) Pressure of the wet natural gas, in pounds per 

square inch gauge.

Temperature, in degrees 

Fahrenheit and pressure, in 

psig, of the wet natural gas.

Current

10
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(1)(xiii) §98.236(c)(4)(i)(H) (xiii) Mole fraction of CH4 in wet natural gas. Concentration of CH4 and CO2

in wet natural gas.

Current

§98.236(e)(1)(xiv) §98.236(c)(4)(i)(H) (xiv) Mole fraction of CO2 in wet natural gas. Concentration of CH4 and CO2

in wet natural gas.

Current

§98.236(e)(1)(xv) §98.236(c)(4)(i)(I) (xv) Whether any dehydrator emissions are vented 

to a vapor recovery device.

What vent gas controls are used 

(refer to §98.233(e)(3) and 

(e)(4)).

Current

§98.236(e)(1)(xvi) §98.236(c)(4)(i)(I) (xvi) Whether any dehydrator emissions are vented 

to a flare or regenerator firebox/fire tubes. ...

What vent gas controls are used 

(refer to §98.233(e)(3) and 

(e)(4)).

Current

§98.236(e)(1)(xvi)

and (e)(1)(xvi)(A)

§98.236(c)(4)(i)(K) (xvi) ... If any emissions are vented to a flare or 

regenerator firebox/fire tubes, report the 

information specified in paragraphs (e)(1)(xvi)(A) 

through (e)(1)(xvi)(C) of this section for these 

emissions from the dehydrator.

(A) Annual CO2 emissions, in metric tons CO2, for 

the dehydrator, calculated according to

§98.233(e)(6).

For each glycol dehydrator, 

report annual CO2, CH4, and 

N2O emissions that resulted 

from flaring process gas from 

the dehydrator, expressed in 

metric tons CO2e for each gas.

Current

§98.236(e)(1)(xvi)

(B)

§98.236(c)(4)(i)(K) (B) Annual CH4 emissions, in metric tons CH4, for 

the dehydrator, calculated according to

§98.233(e)(6).

For each glycol dehydrator, 

report annual CO2, CH4, and 

N2O emissions that resulted 

from flaring process gas from 

the dehydrator, expressed in 

metric tons CO2e for each gas.

Current

§98.236(e)(1)(xvi)

(C)

§98.236(c)(4)(i)(K) (C) Annual N2O emissions, in metric tons N2O per 

year, for the dehydrator, calculated according to

§98.233(e)(6).

For each glycol dehydrator, 

report annual CO2, CH4, and 

N2O emissions that resulted 

from flaring process gas from 

the dehydrator, expressed in 

metric tons CO2e for each gas.

Current

11
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(1)(xvii) (xvii) Whether any dehydrator emissions are vented 

to the atmosphere without being routed to a flare or 

regenerator firebox/fire tubes.

New

§98.236(e)(1)(xvii)

and (e)(1)(xvii)(A)

§98.236(c)(4)(i)(J) (xvii) If any emissions are not routed to a flare or 

regenerator firebox/fire tubes, then you must report 

the information specified in paragraphs 

(e)(1)(xvii)(A) and (e)(1)(xvii)(B) of this section for 

those emissions from the dehydrator.

(A) Annual CO2 emissions, in metric tons CO2, for 

the dehydrator when not venting to a flare or 

regenerator firebox/fire tubes, calculated according 

to §98.233(e)(1) and, if applicable, (e)(5).

For each glycol dehydrator, 

report annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current

§98.236(e)(1)

(xvii)(B)

§98.236(c)(4)(i)(J) (B) Annual CH4 emissions, in metric tons CH4, for 

the dehydrator when not venting to a flare or 

regenerator firebox/fire tubes, calculated according 

to §98.233(e)(1) and, if applicable, (e)(5).

For each glycol dehydrator, 

report annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current

§98.236(e)(1)(xviii) (xviii) Sub-basin ID that best represents the wells 

supplying gas to the dehydrator (for the onshore 

petroleum and natural gas production industry 

segment only).

New

§98.236(e)(2) and 

(e)(2)(i)

§98.236(c)(4)(ii) (A) (2) For glycol dehydrators with an annual average 

daily natural gas throughput less than 0.4 million 

standard cubic feet per day (as specified in 

§98.233(e)(2)), you must report the information 

specified in paragraphs (e)(2)(i) through (e)(2)(iv) 

of this section for the entire facility.

(i) The total number of dehydrators at the facility.

Count of glycol dehydrators. Current

§98.236(e)(2)(ii) §98.236(c)(4)(ii)(B) (ii) Whether any dehydrator emissions were vented 

to a vapor recovery device. ...

Which vent gas controls are 

used (refer to §98.233(e)(3) 

and (e)(4)).

Current

12
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(2)(ii) (ii) ... If any dehydrator emissions were vented to a 

vapor recovery device, then you must report the 

total number of dehydrators at the facility that 

vented to a vapor recovery device.

New

§98.236(e)(2)(iii) §98.236(c)(4)(ii)(B) (iii) Whether any dehydrator emissions were vented 

to a control device other than a vapor recovery 

device or a flare or regenerator firebox/fire tubes. 

...

Which vent gas controls are 

used (refer to §98.233(e)(3) 

and (e)(4)).

Current

§98.236(e)(2)(iii) (iii) ... If any dehydrator emissions were vented to 

a control device(s) other than a vapor recovery 

device or a flare or regenerator firebox/fire tubes,

then you must specify the type of control device(s)

and the total number of dehydrators at the facility 

that were vented to each type of control device.

New

§98.236(e)(2)(iv) (iv) Whether any dehydrator emissions were vented 

to a flare or regenerator firebox/fire tubes. ...

New

§98.236(e)(2)(iv)

and (e)(2)(iv)(A)

(iv) ... If any dehydrator emissions were vented to a 

flare or regenerator firebox/fire tubes, then you 

must report the information specified in paragraphs 

(e)(2)(iv)(A) through (e)(2)(iv)(D) of this section.

(A) The total number of dehydrators venting to a 

flare or regenerator firebox/fire tubes.

New

§98.236(e)(2)(iv)(B) §98.236(c)(4)(ii)(D) (B) Annual CO2 emissions, in metric tons CO2, for 

the dehydrators reported in paragraph (e)(2)(iv)(A) 

of this section, calculated according to

§98.233(e)(6).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level that resulted from the 

flaring of process gas, 

expressed in metric tons CO2e 

for each gas, combined for all 

glycol dehydrators with annual 

average daily throughput of 

less than 0.4 MMscfd.

Current

13
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(2)(iv)(C) §98.236(c)(4)(ii)(D) (C) Annual CH4 emissions, in metric tons CH4, for 

the dehydrators reported in paragraph (e)(2)(iv)(A) 

of this section, calculated according to

§98.233(e)(6).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level that resulted from the 

flaring of process gas, 

expressed in metric tons CO2e 

for each gas, combined for all 

glycol dehydrators with annual 

average daily throughput of 

less than 0.4 MMscfd.

Current

§98.236(e)(2)(iv)(D) §98.236(c)(4)(ii)(D) (D) Annual N2O emissions, in metric tons N2O, for 

the dehydrators reported in paragraph (e)(2)(iv)(A) 

of this section, calculated according to

§98.233(e)(6).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level that resulted from the 

flaring of process gas, 

expressed in metric tons CO2e 

for each gas, combined for all 

glycol dehydrators with annual 

average daily throughput of 

less than 0.4 MMscfd.

Current

§98.236(e)(2)(v) and 

(e)(2)(v)(A)

§98.236(c)(4)(ii)(C) (v) For dehydrator emissions that were not vented 

to a flare or regenerator firebox/fire tubes, report 

the information specified in paragraphs (e)(2)(v)(A) 

and (e)(2)(v)(B) of this section.

(A) Annual CO2 emissions, in metric tons CO2, for 

emissions from all dehydrators reported in 

paragraph (e)(2)(i) of this section that were not 

vented to a flare or regenerator firebox/fire tubes, 

calculated according to §98.233(e)(2), (e)(4), and, if 

applicable, (e)(5), where emissions are added 

together for all such dehydrators.

Report annual CO2 and CH4

emissions at the facility level 

that resulted from venting gas 

directly to the atmosphere, 

expressed in metric tons CO2e 

for each gas, combined for all 

glycol dehydrators with annual 

average daily throughput of 

less than 0.4 MMscfd.

Current

14
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(2)(v)(B) §98.236(c)(4)(ii)(C) (B) Annual CH4 emissions, in metric tons CH4, for 

emissions from all dehydrators reported in 

paragraph (e)(2)(i) of this section that were not 

vented to a flare or regenerator firebox/fire tubes, 

calculated according to §98.233(e)(2), (e)(4), and, if 

applicable, (e)(5), where emissions are added 

together for all such dehydrators.

Report annual CO2 and CH4

emissions at the facility level 

that resulted from venting gas 

directly to the atmosphere, 

expressed in metric tons CO2e 

for each gas, combined for all 

glycol dehydrators with annual 

average daily throughput of 

less than 0.4 MMscfd.

Current

§98.236(e)(3) and 

(e)(3)(i)

§98.236(c)(4)(iii) (A) (3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. (the 

total number of dehydrators.)

Count of desiccant dehydrators. Current

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(whether any dehydrator emissions were vented to a 

vapor recovery device).

New

15
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. (the 

total number of dehydrators vented to a vapor 

recovery device)

New

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(whether any dehydrator emissions were vented to a 

control device other than a vapor recovery device or 

a flare or regenerator firebox/fire tubes, and the 

control device type).

New

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. (the 

number of dehydrators vented to a control device 

other than a vapor recovery device or a flare or 

regenerator firebox/fire tubes)

New

16
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(whether any dehydrator emissions are vented to a 

flare or regenerator firebox/fire tubes.)

New

§98.236(e)(3) and 

(e)(3)(i)

(3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. (the 

total number of dehydrators venting to a flare or 

regenerator firebox/fire tubes.)

New

§98.236(e)(3) and 

(e)(3)(i)

§98.236(c)(4)(iii)(B) (3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(Annual CO2 emissions for the dehydrators venting 

to a flare or firebox/fire tubes)

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all absorbent 

desiccant dehydrators 

combined.

Current

17
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(3) and 

(e)(3)(i)

§98.236(c)(4)(iii)(B) (3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(Annual CH4 emissions for the dehydrators venting 

to a flare or firebox/fire tubes.)

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all absorbent 

desiccant dehydrators 

combined.

Current

§98.236(e)(3) and 

(e)(3)(i)

§98.236(c)(4)(iii)(B) (3) For dehydrators that use desiccant (as specified 

in §98.233(e)(3)), you must report the information 

specified in paragraphs (e)(3)(i) through (e)(3)(iii) 

of this section for the entire facility.

(i) The same information specified in paragraphs 

(e)(2)(i) through (e)(2)(iv) of this section for glycol 

dehydrators, and report the information under this 

paragraph for dehydrators that use desiccant. 

(Annual N2O emissions for the dehydrators venting 

to a flare or firebox/fire tubes.)

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all absorbent 

desiccant dehydrators 

combined.

Current

§98.236(e)(3)(ii) §98.236(c)(4)(iii)(B) (ii) Annual CO2 emissions, in metric tons CO2, for 

emissions from all desiccant dehydrators reported 

under paragraph (e)(3)(i) of this section that are not 

venting to a flare or regenerator firebox/fire tubes, 

calculated according to §98.233(e)(3), (e)(4), and, if 

applicable, (e)(5), and summing for all such 

dehydrators.

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all absorbent 

desiccant dehydrators 

combined.

Current

18
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(e)(3)(iii) §98.236(c)(4)(iii)(B) (iii) Annual CH4 emissions, in metric tons CH4, for 

emissions from all desiccant dehydrators reported in 

paragraph (e)(3)(i) of this section that are not 

venting to a flare or regenerator firebox/fire tubes, 

calculated according to §98.233(e)(3), (e)(4), and, if 

applicable, (e)(5), and summing for all such 

dehydrators.

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, for all absorbent 

desiccant dehydrators 

combined.

Current

Liquids Unloading

§98.236(f) (f) You must indicate whether well venting for 

liquids unloading occurs at your facility ...

New

§98.236(f) (f) ... Indicate which methods (as specified in 

§98.233(f)) were used to calculate emissions. ...

New

§98.236(f), (f)(1),

and (f)(1)(i)

(f) ... If your facility performs well venting for 

liquids unloading and uses Calculation Method 1, 

then you must report the information specified in 

paragraph (f)(1) of this section. ...

(1) For each sub-basin and well tubing diameter and 

pressure group for which you used Calculation 

Method 1 to calculate natural gas emissions from 

well venting for liquids unloading, report the 

information specified in paragraphs (f)(1)(i) 

through (f)(1)(xii) of this section. Report 

information separately for wells with plunger lifts 

and wells without plunger lifts. 

(i) Sub-basin ID.

New

§98.236(f)(1)(ii) (ii) Well tubing diameter and pressure group ID. New

§98.236(f)(1)(iii) §98.236(c)(5)(i)(B) (iii) Plunger lift indicator. Count of plunger lifts. Whether 

the selected well from the 

tubing diameter and pressure 

group combination had a 

plunger lift (yes/no).

Current

19
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(f)(1)(iv) §98.236(c)(5)(i)(A) (iv) Count of wells vented to the atmosphere for the 

sub-basin/well tubing diameter and pressure group.

Count of wells vented to the 

atmosphere for liquids 

unloading.

Revised

§98.236(f)(1)(v) (v) Percentage of wells for which the monitoring 

period used to determine the cumulative amount of 

time venting was not the full calendar year.

New

§98.236(f)(1)(vi) (vi) Cumulative amount of time wells were vented

(sum of “Tp” from Equation W-7A or W-7B of this 

subpart), in hours.

New

§98.236(f)(1)(vii) §98.236(c)(5)(i)(C) (vii) Cumulative number of unloadings vented to 

the atmosphere for each well, aggregated across all 

wells in the sub-basin/well tubing diameter and 

pressure group.

Cumulative number of 

unloadings vented to the 

atmosphere.

Current

§98.236(f)(1)(viii) (viii) Annual natural gas emissions, in standard 

cubic feet, from well venting for liquids unloading, 

calculated according to §98.233(f)(1).

New

§98.236(f)(1)(ix) §98.236(c)(5)(i)(H) (ix) Annual CO2 emissions, in metric tons CO2, 

from well venting for liquids unloading, calculated 

according to §98.233(f)(1) and §98.233(f)(4).

Report annual CO2 and CH4

emissions, expressed in metric 

tons CO2e for each gas.

Current

§98.236(f)(1)(x) §98.236(c)(5)(i)(H) (x) Annual CH4 emissions, in metric tons CH4, from 

well venting for liquids unloading, calculated 

according to §98.233(f)(1) and §98.233(f)(4).

Report annual CO2 and CH4

emissions, expressed in metric 

tons CO2e for each gas.

Current

§98.236(f)(1)(xi) and 

(f)(1)(xi)(A)

(xi) For each well tubing diameter group and 

pressure group combination, you must report the 

information specified in paragraphs (f)(1)(xi)(A) 

through (f)(1)(xi)(E) of this section for each 

individual well not using a plunger lift that was 

tested during the year.

(A) API number of tested well.

New

20
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(f)(1)(xi)(B) §98.236(c)(5)(i)(F) (B) Casing pressure, in pounds per square inch 

absolute.

Casing pressure, in psia, of 

each well selected to represent 

emissions in that tubing size 

group and pressure group 

combination that does not have 

a plunger lift.

Current

§98.236(f)(1)(xi)(C) §98.236(c)(5)(i)(E) (C) Internal casing diameter, in inches. Internal casing diameter or 

internal tubing diameter in 

inches, where applicable, . . 

.selected to represent emissions 

in that tubing size and pressure 

combination.

Current

§98.236(f)(1)(xi) (D) §98.236(c)(5)(i)(E) (D) Measured depth of the well, in feet. . . . well depth of each well, in 

feet, selected to represent 

emissions in that tubing size 

and pressure combination.

Current

§98.236(f)(1)(xi)(E) §98.236(c)(5)(i)(D) (E) Average flow rate of the well venting over the 

duration of the liquids unloading, in standard cubic 

feet per hour.

Average flow rate of the 

measured well venting in cubic 

feet per hour (refer to 

§98.233(f)(1)(i)(A)).

Current

§98.236(f)(1)(xii) 

and (f)(1)(xii)(A)

(xii) For each well tubing diameter group and 

pressure group combination, you must report the 

information specified in paragraphs (f)(1)(xii)(A) 

through (f)(1)(xii)(E) of this section for each 

individual well using a plunger lift that was tested 

during the year.

(A) The API well number.

New

§98.236(f)(1)(xii)(B) §98.236(c)(5)(i)(G) (B) The tubing pressure, in pounds per square inch 

absolute.

Tubing pressure, in psia, of 

each well selected to represent 

emissions in a tubing size 

group and pressure group 

combination that has a plunger 

lift.

Current

21
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(f)(1)(xii)(C) §98.236(c)(5)(i)(E) (C) The internal tubing diameter, in inches. Internal casing diameter or 

internal tubing diameter in 

inches, where applicable, . . 

.selected to represent emissions 

in that tubing size and pressure 

combination.

Current

§98.236(f)(1)(xii)(D) §98.236(c)(5)(i)(E) (D) Measured depth of the well, in feet. . . .well depth of each well, in 

feet, selected to represent 

emissions in that tubing size 

and pressure combination.

Current

§98.236(f)(1)(xii)(E) §98.236(c)(5)(i)(D) (E) Average flow rate of the well venting over the 

duration of the liquids unloading, in standard cubic 

feet per hour.

Average flow rate of the 

measured well venting in cubic 

feet per hour (refer to 

§98.233(f)(1)(i)(A)).

Current

§98.236(f), (f)(2),

and (f)(2)(i)

(f) ... If the facility performs liquids unloading and 

uses Calculation Method 2 or 3, then you must 

report the information specified in paragraph (f)(2) 

of this section.

(2) For each sub-basin for which you used 

Calculation Method 2 or 3 (as specified in 

§93.233(f)) to calculate natural gas emissions from 

well venting for liquids unloading, you must report 

the information in (f)(2)(i) through (f)(2)(x) of this 

section. Report information separately for each 

calculation method.

(i) Sub-basin ID.

New

§98.236(f)(2)(ii) (ii) Calculation method. New

§98.236(f)(2)(iii) §98.236(c)(5)(ii)(B) (iii) Plunger lift indicator. Count of plunger lifts. Current

§98.236(f)(2)(iv) §98.236(c)(5)(ii)(A) (iv) Number of wells vented to the atmosphere. Count of wells vented to the 

atmosphere for liquids 

unloading.

Current

22
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(f)(2)(v) §98.236(c)(5)(ii)(C) (v) Cumulative number of unloadings vented to the 

atmosphere for each well, aggregated across all 

wells.

Cumulative number of 

unloadings vented to the 

atmosphere.

Current

§98.236(f)(2)(vi) (vi) Annual natural gas emissions, in standard cubic 

feet, from well venting for liquids unloading, 

calculated according to §98.233(f)(2) or 

§98.233(f)(3), as applicable.

New

§98.236(f)(2)(vii) §98.236(c)(5)(ii)(E) (vii) Annual CO2 emissions, in metric tons CO2, 

from well venting for liquids unloading, calculated 

according to §98.233(f)(2) or §98.233(f)(3), as 

applicable, and §98.233(f)(4).

Report annual CO2 and CH4

emissions, expressed in metric 

tons CO2e for each GHG gas.

Current

§98.236(f)(2)(viii) §98.236(c)(5)(ii)(E) (viii) Annual CH4 emissions, in metric tons CH4, 

from well venting for liquids unloading, calculated 

according to §98.233(f)(2) or §98.233(f)(3), as 

applicable, and §98.233(f)(4).

Report annual CO2 and CH4

emissions, expressed in metric 

tons CO2e for each GHG gas.

Current

§98.236(f)(2)(ix) §98.236(c)(5)(ii) (D) (ix) For wells without plunger lifts, the average 

internal casing diameter, in inches.

Average internal casing 

diameter, in inches, for all 

wells, where applicable.

Current

§98.236(f)(2)(x) §98.236(c)(5)(i)(E) (x) For wells with plunger lifts, the average internal 

tubing diameter, in inches.

Internal casing diameter or 

internal tubing diameter in 

inches, where applicable, and 

well depth of each well, in feet, 

selected to represent emissions 

in that tubing size and pressure 

combination.

Current

Completions and Workovers with Hydraulic Fracturing

§98.236(g) (g) You must indicate whether your facility had any 

gas well completions or workovers with hydraulic 

fracturing during the calendar year. ...

New

23
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(g) and 

(g)(1) 

(g) ... If your facility had gas well completions or 

workovers with hydraulic fracturing during the 

calendar year, then you must report information 

specified in paragraphs (g)(1) through (g)(10) of 

this section, for each sub-basin and well type 

combination. Report information separately for 

completions and workovers.

(1) Sub-basin ID.

New

§98.236(g)(2) (2) Well type combination. New

§98.236(g)(3) §98.236(c)(6)(i)(A) 

and (C)

(3) Number of completions or workovers in the subbasin and well type combination category.(A)Total count of completions 

in calendar year.

(C) Total count of workovers in 

calendar year that flare gas or 

vent gas to the atmosphere.

Current

§98.236(g)(4) (4) Calculation method used. New

24
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(g)(5) and 

(g)(5)(i) 

§98.236(c)(6)(i)(E) 

and (F)

(5) If you used Equation W-10A to calculate annual 

volumetric total gas emissions, then you must 

report the information specified in paragraphs 

(g)(5)(i) and (g)(5)(ii) of this section.

(i) Cumulative gas flowback time, in hours, from 

when gas is first detected until sufficient quantities 

are present to enable separation, and the cumulative 

flowback time, in hours, after sufficient quantities 

of gas are present to enable separation (sum of 

“Tp,i” and sum of “Tp,s” values used in Equation W10A). You may delay reporting of this data element 

if you indicate in the annual report that wildcat 

wells and/or delineation wells are the only wells 

included in this number. If you elect to delay 

reporting of this data element, you must report by 

the date specified in §98.236(cc) the total number 

of hours of flowback from all wells during well 

completions or workovers and the API Well

Number(s) for the wells included in the number.

(E) When using Equation W10A, total number of days of 

backflow from all wells during 

completions.

(F) When using Equation W10A, total number of days of 

backflow from all wells during 

workovers.

Revised

§98.236(g)(5)(ii) §98.236(c)(6)(i)(B) 

and (D)

(ii) For the measured well(s), the flowback rate, in 

standard cubic feet per hour (average of “FRs,p” 

values used in Equation W-12A). You may delay 

reporting of this data element if you indicate in the 

annual report that wildcat wells and/or delineation 

wells are the only wells that that can be used for the 

measurement. If you elect to delay reporting of this 

data element, you must report by the date specified 

in §98.236(cc) the measured flowback rate during 

well completion or workover and the API Well

Number(s) for the wells included in the 

measurement.

(B) When using Equation W10A, measured flow rate of 

backflow during well 

completion in standard cubic 

feet per hour.

(D) When using Equation W10A, measured flow rate of 

backflow during well workover 

in standard cubic feet per hour.

Current

25
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(g)(6)(i) (6) If you used Equation W-10B to calculate annual 

volumetric total gas emissions for completions that 

vent gas to the atmosphere, then you must report the 

information specified in paragraphs (g)(6)(i) and 

(g)(6)(ii) of this section.

(i) Vented natural gas volume, in standard cubic 

feet, for each well in the sub-basin (“FVs,p” in 

Equation W-10B).

New

§98.236(g)(6)(ii) (ii) Flow rate at the beginning of time when 

sufficient quantities of gas are present to enable 

separation, in standard cubic feet per hour, for each 

well in the sub-basin (“FRp,i” in Equation W-10B).

New

§98.236(g)(7) (7) Annual gas emissions, in standard cubic feet 

(“Es,n” in Equation W-10A or W-10B).

New

§98.236(g)(8) §98.236(c)(6)(i)(I) and 

(J)

(8) Annual CO2 emissions, in metric tons CO2. (I) Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each 

gas.(J) Annual CO2, CH4, and 

N2O emissions that resulted 

from flares, expressed in metric 

tons CO2e for each gas.

Current

§98.236(g)(9) §98.236(c)(6)(i)(I) and 

(J)

(9) Annual CH4 emissions, in metric tons CH4. (I) Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

(J) Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

26
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(g)(10) §98.236(c)(6)(i)(J) (10) If the well emissions were vented to a flare, 

then you must report the total N2O emissions, in 

metric tons N2O.

(I) Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

(J) Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

N/A1 §98.236(c)(6)(i)(G) N/A Report number of completions 

employing purposely designed 

equipment that separates 

natural gas from the backflow 

and the amount of natural gas, 

in standard cubic feet, 

recovered using engineering 

estimate based on best 

available.

Current

N/A §98.236(c)(6)(i)(H) N/A Report number of workovers

employing purposely designed 

equipment that separates 

natural gas from the backflow 

and the amount of natural gas, 

in standard cubic feet, 

recovered using engineering 

estimate based on best 

available data.

Current

1 “N/A” means the reporting provision in the subpart W 2010 final rule was deleted in the 2014 amendments.

27

 
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Completions and Workovers without Hydraulic Fracturing

§98.236(h) (h) You must indicate whether the facility had any 

gas well completions without hydraulic fracturing 

or any gas well workovers without hydraulic 

fracturing, and if the activities occurred with or 

without flaring. ...

New

§98.236(h), (h)(1),

and (h)(1)(i)

(h) ... If the facility had gas well completions or 

workovers without hydraulic fracturing, then you 

must report the information specified in paragraphs 

(h)(1) through (h)(4) of this section, as applicable.

(1) For each sub-basin with gas well completions 

without hydraulic fracturing and without flaring, 

report the information specified in paragraphs 

(h)(1)(i) through (h)(1)(vi) of this section.

(i) Sub-basin ID.

New

§98.236(h)(1)(ii) §98.236(c)(6)(ii)(A) (ii) Number of well completions that vented gas 

directly to the atmosphere without flaring.

Total count of completions in 

calendar year.

Revised

§98.236(h)(1)(iii) §98.236(c)(6)(ii)(C) (iii) Total number of hours that gas vented directly 

to the atmosphere during venting for all 

completions in the sub-basin category (the sum of 

all “Tp” for completions that vented to the 

atmosphere as used in Equation W-13B).

Total number of days of gas 

venting to the atmosphere 

during backflow for 

completion.

Current

28
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(h)(1)(iv) (iv) Average daily gas production rate for all 

completions without hydraulic fracturing in the subbasin without flaring, in standard cubic feet per 

hour (average of all “Vp” used in Equation W-13B).

You may delay reporting of this data element if you 

indicate in the annual report that wildcat wells 

and/or delineation wells are the only wells that can 

be used for measurement. If you elect to delay 

reporting of this data element, you must report by 

the date specified in §98.236(cc) the measured 

average daily gas production rate for all wells 

during completions and the API Well Number(s) 

for the wells included in the measurement.

New

§98.236(h)(1)(v) §98.236(c)(6)(ii)(D) (v) Annual CO2 emissions, in metric tons CO2, that 

resulted from completions venting gas directly to 

the atmosphere (“Es,p” from Equation W-13B for 

completions that vented directly to the atmosphere, 

converted to mass emissions according to

§98.233(h)(1)).

(D) Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current 

§98.236(h)(1)(vi) §98.236(c)(6)(ii)(D) (vi) Annual CH4 emissions, in metric tons CH4, that 

resulted from completions venting gas directly to 

the atmosphere (Es,p from Equation W-13B for 

completions that vented directly to the atmosphere, 

converted to mass emissions according to

§98.233(h)(1)).

(D) Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current

§98.236(h)(2) and 

(h)(2)(i)

(2) For each sub-basin with gas well completions 

without hydraulic fracturing and with flaring, report 

the information specified in paragraphs (h)(2)(i) 

through (h)(2)(vii) of this section.

(i) Sub-basin ID.

New

§98.236(h)(2)(ii) §98.236(c)(6)(ii)(A) (ii) Number of well completions that flared gas. Total count of completions in 

calendar year.

Revised

29
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(h)(2)(iii) (iii) Total number of hours that gas vented to a flare 

during venting for all completions in the sub-basin 

category (the sum of all “Tp” for completions that 

vented to a flare from Equation W-13B).

New

§98.236(h)(2)(iv) (iv) Average daily gas production rate for all 

completions without hydraulic fracturing in the subbasin with flaring, in standard cubic feet per hour 

(the average of all “Vp” from Equation W-13B).

You may delay reporting of this data element if you 

indicate in the annual report that wildcat wells 

and/or delineation wells are the only wells that can 

be used for the measurement. If you elect to delay 

reporting of this data element, you must report by 

the date specified in §98.236(cc) the measured 

average daily gas production rate for all wells 

during completions and the API Well Number(s) 

for the wells included in the measurement.

New

§98.236(h)(2)(v) §98.236(c)(6)(ii)(E) (v) Annual CO2 emissions, in metric tons CO2, that 

resulted from completions that flared gas calculated 

according to §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

§98.236(h)(2)(vi) §98.236(c)(6)(ii)(E) (vi) Annual CH4 emissions, in metric tons CH4, that 

resulted from completions that flared gas calculated 

according to §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

§98.236(h)(2)(vii) §98.236(c)(6)(ii)(E) (vii) Annual N2O emissions, in metric tons N2O, 

that resulted from completions that flared gas 

calculated according to §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

30
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(h)(3) and 

(h)(3)(i)

(3) For each sub-basin with gas well workovers 

without hydraulic fracturing and without flaring, 

report the information specified in paragraphs 

(h)(3)(i) through (h)(3)(iv) of this section.

(i) Sub-basin ID.

New

§98.236(h)(3)(ii) §98.236(c)(6)(ii)(B) (ii) Number of workovers that vented gas to the 

atmosphere without flaring.

Total count of workovers in 

calendar year that flare gas or 

vent gas to the atmosphere.

Current

§98.236(h)(3)(iii) §98.236(c)(6)(ii)(D) (iii) Annual CO2 emissions, in metric tons CO2 per 

year, that resulted from workovers venting gas 

directly to the atmosphere (“Es,wo” in Equation W13A for workovers that vented directly to the 

atmosphere, converted to mass emissions as 

specified in §98.233(h)(1)).

Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current

§98.236(h)(3)(iv) §98.236(c)(6)(ii)(D) (iv) Annual CH4 emissions, in metric tons CH4 per 

year, that resulted from workovers venting gas 

directly to the atmosphere (“Es,wo” in Equation W13A for workovers that vented directly to the 

atmosphere, converted to mass emissions as 

specified in §98.233(h)(1)).

Annual CO2 and CH4

emissions that resulted from 

venting gas directly to the 

atmosphere, expressed in 

metric tons CO2e for each gas.

Current

§98.236(h)(4) and 

(h)(4)(i)

(4) For each sub-basin with gas well workovers 

without hydraulic fracturing and with flaring, report 

the information specified in paragraphs (h)(4)(i) 

through (h)(4)(v) of this section.

(i) Sub-basin ID.

New

§98.236(h)(4)(ii) §98.236(c)(6)(ii)(B) (ii) Number of workovers that flared gas. Total count of workovers in 

calendar year that flare gas or 

vent gas to the atmosphere.

Current

§98.236(h)(4)(iii) §98.236(c)(6)(ii)(E) (iii) Annual CO2 emissions, in metric tons CO2 per 

year, that resulted from workovers that flared gas 

calculated as specified in §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

31
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(h)(4)(iv) §98.236(c)(6)(ii)(E) (iv) Annual CH4 emissions, in metric tons CH4 per 

year, that resulted from workovers that flared gas, 

calculated as specified in §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

§98.236(h)(4)(v) §98.236(c)(6)(ii)(E) (v) Annual N2O emissions, in metric tons N2O per 

year, that resulted from workovers that flared gas 

calculated as specified in §98.233(h)(2).

Annual CO2, CH4, and N2O 

emissions that resulted from 

flares, expressed in metric tons 

CO2e for each gas.

Current

Blowdown Vent Stacks

§98.236(i) (i) You must indicate whether your facility has 

blowdown vent stacks. ...

New

§98.236(i) (i) ... If your facility has blowdown vent stacks, 

then you must report whether emissions were

calculated by equipment or event type or by using

flow meters or a combination of both. ...

New

§98.236(i) and (i)(1) (i) ... If you calculated emissions by equipment or 

event type for any blowdown vent stacks, then you 

must report the information specified in paragraph 

(i)(1) of this section considering, in aggregate, all 

blowdown vent stacks for which emissions were 

calculated by equipment or event type. ...

(1) If you calculated emissions from any blowdown 

vent stacks by the seven categories listed in 

§98.233(i)(2), then you must report the equipment

or event types ...

New

32
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(i)(1) and 

§98.236(i)(1)(i)

(1) ... the information specified in paragraphs 

(i)(1)(i) through (i)(1)(iii) of this section for each 

equipment or event type. If a blowdown event 

resulted in emissions from multiple equipment 

types, and the emissions cannot be apportioned to 

the different equipment types, then you may report 

the information in paragraphs (i)(1)(i) through 

(i)(1)(iii) of this section for the equipment type that 

represented the largest portion of the emissions for 

the blowdown event.

(i) Total number of blowdowns in the calendar year 

for the equipment or event type (the sum of

equation variable “N” from Equation W-14A or 

Equation W-14B of this subpart, for all unique 

physical volumes for the equipment or event type).

New

§98.236(i)(1)(ii) (ii) Annual CO2 emissions for the equipment or 

event type, in metric tons CO2, as calculated 

according to §98.233(i)(2)(iii).

New

§98.236(i)(1)(iii) (iii) Annual CH4 emissions for the equipment or 

event type, in metric tons CH4, as calculated 

according to §98.233(i)(2)(iii).

New

33
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(i), (i)(2),

and (i)(2)(i)

(i) ...If you calculated emissions using flow meters 

for any blowdown vent stacks, then you must report 

the information specified in paragraph (i)(2) of this 

section.

(2) If you elect to calculate emissions from 

blowdown vent stacks by using a flow meter 

according to §98.233(i)(3), then you must report the 

information specified in paragraphs (i)(2)(i) and 

(i)(2)(ii) of this section for the facility.

(i) Annual CO2 emissions from all blowdown vent 

stacks at the facility for which emissions were 

calculated using flow meters, in metric tons CO2

(the sum of all CO2 mass emission values calculated 

according to §98.233(i)(3) for all flow meters).

New

§98.236(i)(2)(ii) (ii) Annual CH4 emissions from all blowdown vent 

stacks at the facility for which emissions were 

calculated using flow meters, in metric tons CH4

(the sum of all CH4 mass emissions values 

calculated according to §98.233(i)(3) for all flow 

meters).

New

N/A §98.236(c)(7)(i)(A) N/A Total number of blowdowns 

for each unique physical 

volume in the calendar year.

Current

N/A §98.236(c)(7)(i)(B) N/A Annual CO2 and CH4

emissions, for each unique 

physical blowdown volume, 

expressed in metric tons CO2e 

for each gas.

Current

N/A §98.236(c)(7)(i)(C) N/A A unique name or ID number 

for the unique physical volume.

Current

34
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

N/A §98.236(c)(7)(ii)(A) N/A Total number of blowdowns 

for all unique physical volumes 

in the calendar year.

Current

N/A §98.236(c)(7)(ii)(B) N/A Annual CO2 and CH4

emissions from all unique 

physical volumes as an 

aggregate per facility, 

expressed in metric tons CO2e 

for each gas.

Current

Onshore Production Storage Tanks

§98.236(j) (j) You must indicate whether your facility sends 

produced oil to atmospheric tanks. ...

New

§98.236(j) (j) ... If your facility sends produced oil to 

atmospheric tanks, then you must indicate which 

Calculation Method(s) you used to calculate GHG 

emissions and you must report the information 

specified in paragraphs (j)(1) and (j)(2) of this 

section as applicable. ...

New

§98.236(j) (j) ... If you used Calculation Method 1 or 

Calculation Method 2, and any atmospheric tanks 

were observed to have malfunctioning dump valves

during the calendar year, then you must indicate 

that dump valves were malfunctioning and you 

must report the information specified in paragraph 

(j)(3) of this section. ...

New

§98.236(j)(1) and 

(j)(1)(i)

(1) If you used Calculation Method 1 or Calculation 

Method 2 to calculate GHG emissions, then you 

must report the information specified in paragraphs 

(j)(1)(i) through (j)(1)(xiv) of this section for each 

sub-basin, and by calculation method.

(i) Sub-basin ID.

New

35
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(ii) (ii) Calculation method used, and name of the 

software package used if using Calculation Method 

1.

New

§98.236(j)(1)(iii) §98.236(c)(8)(i)(F) and 

§98.236(c)(8)(ii)(A)

(iii) The total annual oil volume from gas-liquid 

separators and direct from wells that is sent to 

applicable onshore production storage tanks, in 

barrels. You may delay reporting of this data 

element if you indicate in the annual report that 

wildcat wells and delineation wells are the only 

wells in the sub-basin with oil production greater 

than or equal to 10 barrels per day and flowing to 

gas-liquid separators or directly to storage tanks. If 

you elect to delay reporting of this data element, 

you must report by the date specified in §98.236(cc) 

the total volume of oil from all separators and wells 

sent to tank(s) and the API Well Number(s) for the 

wells included in this volume.

(i)(F) Total volume of oil from 

all wellhead separators sent to 

tank(s) in barrels per year.

(ii)(A) Total volume of sales 

oil from all wells in barrels per 

year.

Current

§98.236(j)(1)(iv) §98.236(c)(8)(i)(B) (iv) The average gas-liquid separator temperature, 

in degrees Fahrenheit.

Estimated average separator 

temperature, in degrees 

Fahrenheit, 

Current

§98.236(j)(1)(v) §98.236(c)(8)(i)(B) (v) The average gas-liquid separator pressure, in 

pounds per square inch gauge.

Estimated average separator . . 

. estimated average pressure, in 

psig.

Current

§98.236(j)(1)(vi) §98.236(c)(8)(i)(C) (vi) The average sales oil or stabilized oil API 

gravity, in degrees.

Estimated average sales oil 

stabilized API gravity, in 

degrees.

Current

§98.236(j)(1)(vii) §98.236(c)(8)(i)(I) (vii) The minimum and maximum concentration 

(mole fraction) of CO2 in flash gas from onshore 

production storage tanks.

Range of concentrations of 

flash gas, CH4 and CO2.

Current

§98.236(j)(1)(viii) §98.236(c)(8)(i)(I) (viii) The minimum and maximum concentration 

(mole fraction) of CH4 in flash gas from onshore 

production storage tanks.

Range of concentrations of 

flash gas, CH4 and CO2.

Current

36
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(ix) §98.236(c)(8)(i)(A),

§98.236(c)(8)(ii)(B), 

and 

§98.236(c)(8)(ii)(C)

(ix) The number of wells sending oil to gas-liquid 

separators or directly to atmospheric tanks.

(i)(A) Number of wellhead 

separators sending oil to 

atmospheric tanks.

(ii)(B) Total number of wells 

sending oil directly to tanks.

(ii)(C) Total number of wells 

sending oil to separators off the 

well pads.

Current

§98.236(j)(1)(x) §98.236(c)(8)(i)(D)

and 

§98.236(c)(8)(ii)(E)

(x) The number of atmospheric tanks. (i)(D) Count of hydrocarbon 

tanks at well pads.

(ii)(E) Count of hydrocarbon 

tanks on wellpads.

Current

§98.236(j)(1)(xi) §98.236(c)(8)(i)(E) (xi) An estimate of the number of atmospheric 

tanks, not on well-pads, receiving your oil.

Best estimate of count of stock 

tanks not at well pads receiving 

your oil.

Current

§98.236(j)(1)(xii)(A) §98.236(c)(8)(i)(G) (xii) If any emissions from of the atmospheric tanks 

at your facility were controlled with vapor recovery 

systems, then you must indicate and report the 

information specified in paragraphs (j)(1)(xii)(A) 

through (j)(1)(xii)(E) of this section.

(A) The number of atmospheric tanks that control 

emissions with vapor recovery systems.

Count of tanks with emissions 

control measures, either vapor 

recovery system or flaring, for 

tanks at well pads.

Current

37
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(xii)(B) §98.236(c)(8)(i)(K) (B) Total CO2 mass, in metric tons CO2, that was

recovered during the calendar year using a vapor 

recovery system.

Annual CO2 and CH4 gas 

quantities that were recovered, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

§98.236(j)(1)(xii)(C) §98.236(c)(8)(i)(K) (C) Total CH4 mass, in metric tons CH4, that was

recovered during the calendar year using a vapor 

recovery system.

Annual CO2 and CH4 gas 

quantities that were recovered, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

§98.236(j)(1)(xii)(D) §98.236(c)(8)(i)(J) (D) Annual CO2 emissions, in metric tons CO2, 

from atmospheric tanks equipped with vapor 

recovery systems.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

38
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(xii)(E) §98.236(c)(8)(i)(J) (E) Annual CH4 emissions, in metric tons CH4, 

from atmospheric tanks equipped with vapor 

recovery systems.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

§98.236(j)(1)(xiii)

and (j)(1)(xiii)(A)

§98.236(c)(8)(i)(G) (xiii) If any atmospheric tanks at your facility 

vented gas directly to the atmosphere without using 

a vapor recovery system or without flaring, then 

you must report the information specified in 

paragraphs (j)(1)(xiii)(A) through (j)(1)(xiii)(C) of 

this section.

(A) The number of atmospheric tanks that vented 

gas directly to the atmosphere without using a vapor 

recovery system or without flaring.

Count of tanks with emissions 

control measures, either vapor 

recovery system or flaring, for 

tanks at well pads.

Current

§98.236(j)(1)(xiii)

(B)

§98.236(c)(8)(i)(J) (B) Annual CO2 emissions, in metric tons CO2, that 

resulted from venting gas directly to the 

atmosphere.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

39
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(xiii)

(C)

§98.236(c)(8)(i)(J) (C) Annual CH4 emissions, in metric tons CH4, that 

resulted from venting gas directly to the 

atmosphere.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, for all wellhead 

gas-liquid separators or storage 

tanks using Calculation 

Methodology 1, and for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 2 of 

§98.233(j).

Current

§98.236(j)(1)(xiv) 

and (j)(1)(xiv)(A)

§98.236(c)(8)(i)(G) (xiv) If you controlled emissions from any 

atmospheric tanks at your facility with one or more 

flares, then you must report the information 

specified in paragraphs (j)(1)(xiv)(A) through 

(j)(1)(xiv)(D) of this section.

(A) The number of atmospheric tanks that 

controlled emissions with flares.

Count of tanks with emissions 

control measures, either vapor 

recovery system or flaring, for 

tanks at well pads.

Current

§98.236(j)(1)(xiv)

(B)

§98.236(c)(8)(i)(L) (B) Annual CO2 emissions, in metric tons CO2, 

from atmospheric tanks that controlled emissions 

with one or more flares.

Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 1, 

and for all wellhead gas-liquid 

separators or storage tanks 

using Calculation Methodology 

2 of §98.233(j).

Current

40
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(1)(xiv) 

(C)

§98.236(c)(8)(i)(L) (C) Annual CH4 emissions, in metric tons CH4, 

from atmospheric tanks that controlled emissions 

with one or more flares.

Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 1, 

and for all wellhead gas-liquid 

separators or storage tanks 

using Calculation Methodology 

2 of §98.233(j).

Current

§98.236(j)(1)(xiv) 

(D)

§98.236(c)(8)(i)(L) (D) Annual N2O emissions, in metric tons N2O, 

from atmospheric tanks that controlled emissions 

with one or more flares.

(I) Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, for all 

wellhead gas-liquid separators 

or storage tanks using 

Calculation Methodology 1, 

and for all wellhead gas-liquid 

separators or storage tanks 

using Calculation Methodology 

2 of §98.233(j).

Current

41
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(2) and 

(j)(2)(i) and 

(j)(2)(i)(A)

§98.236(c)(8)(iii)(C) (2) If you used Calculation Method 3 to calculate 

GHG emissions, then you must report the 

information specified in paragraphs (j)(2)(i) through 

(j)(2)(iii) of this section.

(i) Report the information specified in paragraphs 

(j)(2)(i)(A) through (j)(2)(i)(F) of this section at the 

basin level for atmospheric tanks where emissions 

were calculated using Calculation Method 3.

(A) The total annual oil throughput that is sent to 

atmospheric tanks in the basin, in barrels. You may 

delay reporting of this data element if you indicate 

in the annual report that wildcat wells and 

delineation wells are the only wells in the sub-basin 

with oil production less than 10 barrels per day and 

that send oil to atmospheric tanks. If you elect to 

delay reporting of this data element, you must 

report by the date specified in §98.236(cc) the total 

annual oil throughput from all wells sent to the 

tank(s) and the API Well Number(s) for the wells 

included in this volume.

Total volume of oil production 

in barrels per year.

Revised

§98.236(j)(2)(i)(B) §98.236(c)(8)(iii) (D) (B) An estimate of the fraction of oil throughput 

reported in paragraph (j)(2)(i)(A) sent to 

atmospheric tanks in the basin that controlled

emissions with flares.

Best estimate of fraction of 

production sent to tanks with 

assumed control measures: 

either vapor recovery system or 

flaring of tank vapors.

Current

§98.236(j)(2)(i)(C) §98.236(c)(8)(iii) (D) (C) An estimate of the fraction of oil throughput 

reported in paragraph (j)(2)(i)(A) sent to 

atmospheric tanks in the basin that controlled

emissions with vapor recovery systems.

Best estimate of fraction of 

production sent to tanks with 

assumed control measures: 

either vapor recovery system or 

flaring of tank vapors.

Current

§98.236(j)(2)(i)(D) §98.236(c)(8)(iii)(E) (D) The number of atmospheric tanks in the basin. Count of hydrocarbon tanks on 

well pads.

Current

42
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(2)(i)(E) §98.236(c)(8)(iii) (A) (E) The number of wells with gas-liquid separators 

(“Count” from Equation W-15 of this subpart) in

the basin.

Number of wellhead 

separators.

Current

§98.236(j)(2)(i)(F) §98.236(c)(8)(iii)(B) (F) The number of wells without gas-liquid 

separators (“Count” from Equation W-15 of this 

subpart) in the basin.

Number of wells without 

wellhead separators.

Current

§98.236(j)(2)(ii) and 

(j)(2)(ii)(A)

(ii) Report the information specified in paragraphs 

(j)(2)(ii)(A) through (j)(2)(ii)(D) of this section for 

each sub-basin with atmospheric tanks whose 

emissions were calculated using Calculation 

Method 3 and that did not control emissions with 

flares.

(A) Sub-basin ID.

New

§98.236(j)(2)(ii)(B) (B) The number of atmospheric tanks in the subbasin that did not control emissions with flares.New

§98.236(j)(2)(ii)(C) §98.236(c)(8)(iii)(F) (C) Annual CO2 emissions, in metric tons CO2,

from atmospheric tanks in the sub-basin that did not 

control emissions with flares, calculated using 

Equation W-15 of this subpart and adjusted for 

vapor recovery, if applicable.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for Calculation 

Methodology 5 of §98.233(j).

Current

§98.236(j)(2)(ii)(D) §98.236(c)(8)(iii)(F) (D) Annual CH4 emissions, in metric tons CH4,

from atmospheric tanks in the sub-basin that did not 

control emissions with flares, calculated using 

Equation W-15 of this subpart and adjusted for 

vapor recovery, if applicable.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for Calculation 

Methodology 5 of §98.233(j).

Current

43
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(2)(iii) and 

(j)(2)(iii)(A)

(iii) Report the information specified in paragraphs 

(j)(2)(iii)(A) through (j)(2)(iii)(E) of this section for 

each sub-basin with atmospheric tanks whose 

emissions were calculated using Calculation 

Method 3 and that controlled emissions with flares. 

(A) Sub-basin ID.

New

§98.236(j)(2)(iii)(B) (B) The number of atmospheric tanks in the subbasin that controlled emissions with flares.New

§98.236(j)(2)(iii)(C) §98.236(c)(8)(iii) (H) (C) Annual CO2 emissions, in metric tons CO2,

from atmospheric tanks that controlled emissions 

with flares.

Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, at the 

sub-basin level for Calculation 

Methodology 5 of §98.233(j).

Current

§98.236(j)(2)(iii)(D) §98.236(c)(8)(iii) (H) (D) Annual CH4 emissions, in metric tons CH4,

from atmospheric tanks that controlled emissions 

with flares.

Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, at the 

sub-basin level for Calculation 

Methodology 5 of §98.233(j).

Current

§98.236(j)(2)(iii)(E) §98.236(c)(8)(iii) (H) (E) Annual N2O emissions, in metric tons N2O,

from atmospheric tanks that controlled emissions 

with flares.

Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, at the 

sub-basin level for Calculation 

Methodology 5 of §98.233(j).

Current

44
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(j)(3) and 

(j)(3)(i)

§98.236(c)(8)(iv)(A) (3) If you used Calculation Method 1 or Calculation 

Method 2, and any gas-liquid separator liquid dump 

values did not close properly during the calendar 

year, then you must report the information specified 

in paragraphs (j)(3)(i) through (j)(3)(iv) of this 

section.

(i) The total number of gas-liquid separators whose

liquid dump valves did not close properly during 

the calendar year.

Count of wellhead separators 

that dump valve factor is 

applied.

Current

§98.236(j)(3)(ii) (ii) The total time the dump valves on gas-liquid 

separators did not close properly in the calendar 

year, in hours (“Tn” in Equation W-16 of this 

subpart).

New

§98.236(j)(3)(iii) §98.236(c)(8)(iv)(B) (iii) Annual CO2 emissions, in metric tons CO2, that 

resulted from the dump valves on gas-liquid 

separators not closing properly during the calendar 

year, calculated using Equation W-16 of this 

subpart.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for improperly 

functioning dump valves.

Current

§98.236(j)(3)(iv) §98.236(c)(8)(iv)(B) (iv) Annual CH4 emissions, in metric tons CH4, that 

resulted from the dump valves on gas-liquid 

separators not closing properly during the calendar 

year, calculated using Equation W-16 of this 

subpart.

Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for improperly

functioning dump valves.

Current

N/A §98.236(c)(8)(i)(H) N/A Best estimate of count of stock 

tanks assumed to have 

emissions control measures not 

at well pads, receiving your oil.

Current

45
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

N/A §98.236(c)(8)(ii)(D) N/A Sales oil API gravity range for 

wells in (c)(8)(ii)(B) and 

(c)(8)(ii)(C) of this section, in 

degrees.

Current

N/A §98.236(c)(8)(ii)(F) N/A Count of hydrocarbon tanks, 

both on and off well pads 

assumed to have emissions 

control measures: either vapor 

recovery system or flaring of 

tank vapors.

Current

N/A §98.236(c)(8)(ii)(G) N/A Annual CO2 and CH4

emissions that resulted from 

venting gas to the atmosphere, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for Calculation 

Methodology 3 or 4 of 

§98.233(j).

Current

N/A §98.236(c)(8)(ii)(H) N/A Annual CO2 and CH4 gas 

quantities that were recovered, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for Calculation 

Methodology 3 or 4 of 

§98.233(j).

Current

N/A §98.236(c)(8)(ii)(I) N/A Annual CO2, CH4, and N2O 

emissions that resulted from 

flaring gas, expressed in metric 

tons CO2e for each gas, at the 

sub-basin level for Calculation 

Methodology 3 and 4 of 

§98.233(j).

Current

46
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

N/A §98.236(c)(8)(iii)(G) N/A Annual CO2 and CH4 gas 

quantities that were recovered, 

expressed in metric tons CO2e 

for each gas, at the sub-basin 

level for Calculation 

Methodology 5 of §98.233(j).

Current

Transmission Storage Tanks

§98.236(k) (k) You must indicate whether your facility 

contains any transmission storage tanks. ...

New

§98.236(k), (k)(1),

and (k)(1)(i)

§98.236(c)(9)(iii) (k) ... If your facility contains at least one 

transmission storage tank, then you must report the 

information specified in paragraphs (k)(1) through 

(k)(3) of this section for each transmission storage 

tank vent stack.

(1) For each transmission storage tank vent stack 

report the information specified in (k)(1)(i) through 

(k)(1)(iv) of this section.

(i) The unique name or ID number for the 

transmission storage tank vent stack.

A unique name or ID number 

for the vent stack monitored 

according to 40 CFR 

§98.233(k).

Current

§98.236(k)(1)(ii) (ii) Method used to determine if dump valve 

leakage occurred.

New

§98.236(k)(1)(iii) (iii) Indicate whether scrubber dump valve leakage 

occurred for the transmission storage tank vent

according to §98.233(k)(2).

New

§98.236(k)(1)(iv) (iv) Indicate if there is a flare attached to the 

transmission storage tank vent stack.

New

47
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(k)(2) and 

(k)(2)(i)

(2) If scrubber dump valve leakage occurred for a 

transmission storage tank vent stack, as reported in 

paragraph (k)(1)(iii) of this section, and the vent 

stack vented directly to the atmosphere during the 

calendar year, then you must report the information 

specified in paragraphs (k)(2)(i) through (k)(2)(v) 

of this section for each transmission storage vent 

stack where scrubber dump valve leakage occurred.

(i) Method used to measure the leak rate.

New

§98.236(k)(2)(ii) (ii) Measured leak rate (average leak rate from a

continuous flow measurement device), in standard 

cubic feet per hour.

New

§98.236(k)(2)(iii) (iii) Duration of time that the leak is counted as 

having occurred, in hours, as determined in 

§98.233(k)(3) (may use best available data if a 

continuous flow measurement device was used).

New

§98.236(k)(2)(iv) §98.236(c)(9)(i) (iv) Annual CO2 emissions, in metric tons CO2, that 

resulted from venting gas directly to the 

atmosphere, calculated according to §98.233(k)(1) 

through (k)(4).

For each vent stack, report 

annual CO2 and CH4 emissions 

that resulted from venting gas 

directly to the atmosphere, 

expressed in metric tons CO2e 

for each gas.

Current

§98.236(k)(2)(v) §98.236(c)(9)(i) (v) Annual CH4 emissions, in metric tons CH4, that 

resulted from venting gas directly to the 

atmosphere, calculated according to §98.233(k)(1) 

through (k)(4).

For each vent stack, report 

annual CO2 and CH4 emissions 

that resulted from venting gas 

directly to the atmosphere, 

expressed in metric tons CO2e 

for each gas.

Current

48
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(k)(3) and 

(k)(3)(i)

(3) If scrubber dump valve leakage occurred for a 

transmission storage tank vent stack, as reported in 

paragraph (k)(1)(iii) and the vent stack vented to a 

flare during the calendar year, then you must report 

the information specified in paragraphs (k)(3)(i) 

through (k)(3)(vi).

(i) Method used to measure the leak rate.

New

§98.236(k)(3)(ii) (ii) Measured leakage rate (average leak rate from a

continuous flow measurement device), in standard 

cubic feet per hour.

New

§98.236(k)(3)(iii) (iii) Duration of time that flaring occurred, in hours, 

as determined in §98.233(k)(3) (may use best 

available data if a continuous flow measurement 

device was used).

New

§98.236(k)(3)(iv) §98.236(c)(9)(ii) (iv) Annual CO2 emissions, in metric tons CO2, that 

resulted from flaring gas, calculated according to 

§98.233(k)(5).

For each transmission storage 

tank, report annual CO2, CH4, 

and N2O emissions that 

resulted from flaring process 

gas from the transmission 

storage tank, expressed in 

metric tons CO2e for each gas.

Current

§98.236(k)(3)(v) §98.236(c)(9)(ii) (v) Annual CH4 emissions, in metric tons CH4, that 

resulted from flaring gas, calculated according to 

§98.233(k)(5).

For each transmission storage 

tank, report annual CO2, CH4, 

and N2O emissions that 

resulted from flaring process 

gas from the transmission 

storage tank, expressed in 

metric tons CO2e for each gas.

Current

49
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(k)(3)(vi) §98.236(c)(9)(ii) (vi) Annual N2O emissions, in metric tons N2O, that 

resulted from flaring gas, calculated according to 

§98.233(k)(5).

For each transmission storage 

tank, report annual CO2, CH4, 

and N2O emissions that 

resulted from flaring process 

gas from the transmission 

storage tank, expressed in 

metric tons CO2e for each gas.

Current

Well Testing 

§98.236(l) (l) You must indicate whether you performed gas 

well or oil well testing, and if the testing of gas 

wells or oil wells resulted in vented or flared 

emissions during the calendar year. ...

New

§98.236(l), (l)(1),

and (l)(1)(i)

§98.236(c)(10)(i) (l) ... If you performed well testing that resulted in 

vented or flared emissions during the calendar year,

then you must report the information specified in 

paragraphs (l)(1) through (l)(4), as applicable.

(1) If you used Equation W-17A to calculate annual 

volumetric natural gas emissions at actual 

conditions from oil wells and the emissions are not 

vented to a flare, then you must report the 

information specified in paragraphs (l)(1)(i) through 

(l)(1)(vi) of this section.

(i) Number of wells tested in the calendar year.

Number of wells tested per 

basin in calendar year.

Current

§98.236(l)(1)(ii) §98.236(c)(10)(iii) (ii) Average number of well testing days per well 

for well(s) tested in the calendar year.

Average number of days the 

well is tested in a basin.

Current

§98.236(l)(1)(iii) §98.236(c)(10)(ii) (iii) Average gas to oil ratio for well(s) tested, in 

cubic feet of gas per barrel of oil.

Average gas to oil ratio for 

each basin.

Current

50
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(l)(1)(iv) (iv) Average flow rate for well(s) tested, in barrels 

of oil per day. You may delay reporting of this data 

element if you indicate in the annual report that 

wildcat wells and/or delineation wells are the only 

wells that are tested. If you elect to delay reporting 

of this data element, you must report by the date 

specified in §98.236(cc) the measured average 

annual production rate for well(s) tested and the 

API Well Number(s) for the wells included in the 

measurement.

New

§98.236(l)(1)(v) §98.236(c)(10)(iv) (v) Annual CO2 emissions, in metric tons CO2, as 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(1)(vi) §98.236(c)(10)(iv) (vi) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(2) and 

(l)(2)(i)

§98.236(c)(10)(i) (2) If you used Equation W-17A to calculate annual 

volumetric natural gas emissions at actual 

conditions from oil wells and the emissions are 

vented to a flare, then you must report the 

information specified in paragraphs (l)(2)(i) through 

(l)(2)(vii) of this section.

(i) Number of wells tested in the calendar year.

Number of wells tested per 

basin in calendar year.

Current

§98.236(l)(2)(ii) §98.236(c)(10)(iii) (ii) Average number of well testing days per well 

for well(s) tested in the calendar year.

Average number of days the 

well is tested in a basin.

Current

§98.236(l)(2)(iii) §98.236(c)(10)(ii) (iii) Average gas to oil ratio for well(s) tested, in 

cubic feet of gas per barrel of oil.

Average gas to oil ratio for 

each basin.

Current

51
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(l)(2)(iv) (iv) Average flow rate for well(s) tested, in barrels 

of oil per day. You may delay reporting of this data 

element if you indicate in the annual report that 

wildcat wells and/or delineation wells are the only 

wells that are tested. If you elect to delay reporting 

of this data element, you must report by the date 

specified in §98.236(cc) the measured average 

annual production rate for well(s) tested and the 

API Well Number(s) for the wells included in the 

measurement.

New

§98.236(l)(2)(v) §98.236(c)(10)(iv) (v) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(2)(vi) §98.236(c)(10)(iv) (vi) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(2)(vii) §98.236(c)(10)(iv) (vii) Annual N2O emissions, in metric tons N2O, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(3) and 

(l)(3)(i)

§98.236(c)(10)(i) (3) If you used Equation W-17B to calculate annual 

volumetric natural gas emissions at actual 

conditions from gas wells and the emissions were

not vented to a flare, then you must report the 

information specified in paragraphs (l)(3)(i) through 

(l)(3)(v) of this section.

(i) Number of wells tested in the calendar year.

Number of wells tested per 

basin in calendar year.

Current

52
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(l)(3)(ii) §98.236(c)(10)(iii) (ii) Average number of well testing days per well 

for well(s) tested in the calendar year.

Average number of days the 

well is tested in a basin.

Current

§98.236(l)(3)(iii) (iii) Average annual production rate for well(s) 

tested in actual cubic feet per day. You may delay 

reporting of this data element if you indicate in the 

annual report that wildcat wells and/or delineation 

wells are the only wells that are tested. If you elect 

to delay reporting of this data element, you must 

report by the date specified in §98.236(cc) the 

measured average annual production rate for well(s) 

tested and the API Well Number(s) for the wells 

included in the measurement.

New

§98.236(l)(3)(iv) §98.236(c)(10)(iv) (iv) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(3)(v) §98.236(c)(10)(iv) (v) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(l).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

well testing venting.

Current

§98.236(l)(4) and 

(l)(4)(i)

§98.236(c)(10)(i) (4) If you used Equation W-17B to calculate annual 

volumetric natural gas emissions at actual 

conditions from gas wells and the emissions were

vented to a flare, then you must report the 

information specified in paragraphs (l)(4)(i) through 

(l)(4)(vi) of this section.

(i) Number of wells tested in calendar year.

Number of wells tested per 

basin in calendar year.

Current

§98.236(l)(4)(ii) §98.236(c)(10)(iii) (ii) Average number of well testing days per well 

for well(s) tested in the calendar year.

Average number of days the 

well is tested in a basin.

Current

53
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(l)(4)(iii) (iii) Average annual production rate for well(s) 

tested, in actual cubic feet per day. You may delay 

reporting of this data element if you indicate in the 

annual report that wildcat wells and/or delineation 

wells are the only wells that are tested. If you elect 

to delay reporting of this data element, you must 

report by the date specified in §98.236(cc) the 

measured average annual production rate for well(s) 

tested and the API Well Number(s) for the wells 

included in the measurement.

New

§98.236(l)(4)(iv) §98.236(c)(10)(v) (iv) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(l).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from well testing flaring.

Current

§98.236(l)(4)(v) §98.236(c)(10)(v) (v) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(l).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from well testing flaring.

Current

§98.236(l)(4)(vi) §98.236(c)(10)(v) (vi) Annual N2O emissions, in metric tons N2O, 

calculated according to §98.233(l).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from well testing flaring.

Current

Associated Natural Gas

§98.236(m) (m) You must indicate whether any associated gas 

was vented or flared during the calendar year. ...

New

54
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(m) and 

(m)(1)

(m) ... If associated gas was vented or flared during 

the calendar year, then you must report the 

information specified in paragraphs (m)(1) through 

(m)(8) of this section for each sub-basin.

(1) Sub-basin ID. 

New

§98.236(m)(2) (2) Indicate whether any associated gas was vented

directly to the atmosphere without flaring.

New

§98.236(m)(3) (3) Indicate whether any associated gas was flared. New

§98.236(m)(4) §98.236(c)(11)(ii) (4) Average gas to oil ratio, in standard cubic feet 

of gas per barrel of oil (average of the “GOR” 

values used in Equation W-18 of this subpart).

Average gas to oil ratio for 

each basin.

Current

§98.236(m)(5) (5) Volume of oil produced, in barrels, in the 

calendar year during the time periods in which 

associated gas was vented or flared (the sum of 

“Vp,q” used in Equation W-18 of this subpart). You 

may delay reporting of this data element if you 

indicate in the annual report that wildcat wells 

and/or delineation wells are the only wells from 

which associated gas was vented or flared. If you 

elect to delay reporting of this data element, you 

must report by the date specified in §98.236(cc) the 

volume of oil produced for well(s) with associated 

gas venting and flaring and the API Well

Number(s) for the wells included in the 

measurement.

New

55
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(m)(6) (6) Total volume of associated gas sent to sales, in 

standard cubic feet, in the calendar year during time 

periods in which associated gas was vented or 

flared (the sum of “SG” values used in Equation W18 of §98.233(m)). You may delay reporting of this 

data element if you indicate in the annual report that 

wildcat wells and/or delineation wells are the only 

wells from which associated gas was vented or 

flared. If you elect to delay reporting of this data 

element, you must report by the date specified in 

§98.236(cc) the measured total volume of 

associated gas sent to sales for well(s) with 

associated gas venting and flaring and the API Well 

Number(s) for the wells included in the 

measurement.

New

§98.236(m)(7) and 

(m)(7)(i)

§98.236(c)(11)(i) (7) If you had associated gas emissions vented 

directly to the atmosphere without flaring, then you 

must report the information specified in paragraphs 

(m)(7)(i) through (m)(7)(iii) of this section for each 

sub-basin.

(i) Total number of wells for which associated gas 

was vented directly to the atmosphere without 

flaring.

Number of wells venting or 

flaring associated natural gas in 

a calendar year.

Current

§98.236(m)(7)(ii) §98.236(c)(11)(iii) (ii) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(m)(3) and (m)(4).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

associated natural gas venting.

Current

§98.236(m)(7)(iii) §98.236(c)(11)(iii) (iii) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(m)(3) and (m)(4).

Report annual CO2 and CH4

emissions at the facility level, 

expressed in metric tons CO2e 

for each gas, emissions from 

associated natural gas venting.

Current

56
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(m)(8) and 

(m)(8)(i)

§98.236(c)(11)(i) (8) If you had associated gas emissions that were

flared, then you must report the information 

specified in paragraphs (m)(8)(i) through (m)(8)(iv) 

of this section for each sub-basin.

(i) Total number of wells for which associated gas 

was flared.

Number of wells venting or 

flaring associated natural gas in 

a calendar year.

Current

§98.236(m)(8)(ii) §98.236(c)(11)(iv) (ii) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(m)(5).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from associated natural gas 

flaring.

Current

§98.236(m)(8)(iii) §98.236(c)(11)(iv) (iii) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(m)(5).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from associated natural gas 

flaring.

Current

§98.236(m)(8)(iv) §98.236(c)(11)(iv) (iv) Annual N2O emissions, in metric tons N2O, 

calculated according to §98.233(m)(5).

Report annual CO2, CH4, and 

N2O emissions at the facility 

level, expressed in metric tons 

CO2e for each gas, emissions 

from associated natural gas 

flaring.

Current

Flare Stacks

§98.236(n) (n) You must indicate if your facility contains any 

flare stacks. ...

New

57
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(n) and 

(n)(1)

§98.236(c)(12)(x) (n) ... You must report the information specified in 

paragraphs (n)(1) through (n)(13) of this section for 

each flare stack at your facility, and for each 

industry segment applicable to your facility.

(1) Unique name or ID for the flare stack. For the 

onshore petroleum and natural gas production 

industry segment, a different name or ID may be 

used for a single flare stack for each location where

it operates at in a given calendar year.

For the natural gas processing 

industry segment, a unique 

name or ID number for the 

flare stack.

Current

§98.236(n)(2) §98.236(c)(12)(i) (2) Indicate whether the flare stack has a continuous 

flow measurement device.

Whether flare has a continuous 

flow monitor.

Current

§98.236(n)(3) §98.236(c)(12)(iv) (3) Indicate whether the flare stack has a continuous 

gas composition analyzer on feed gas to the flare.

Whether flare has a continuous 

gas analyzer.

Current

§98.236(n)(4) §98.236(c)(12)(ii) (4) Volume of gas sent to the flare in standard cubic 

feet (“Vs” in Equations W-19 and W-20 of this 

subpart).

Volume of gas sent to flare in 

cubic feet per year.

Current

§98.236(n)(5) §98.236(c)(12)(iii) (5) Fraction of the feed gas sent to an un-lit flare 

(“Zu” in Equation W-19 of this subpart).

Percent of gas sent to un-lit 

flare determined by 

engineering estimate and 

process knowledge based on 

best available data and 

operating records.

Current

§98.236(n)(6) §98.236(c)(12)(v) (6) Flare combustion efficiency expressed as the 

fraction of gas combusted by a burning flare.

Flare combustion efficiency. Current

§98.236(n)(7) (7) Mole fraction of CH4 in the feed gas to the flare 

(“XCH4” in Equation W-19 of this subpart).

New

§98.236(n)(8) (8) Mole fraction of CO2 in the feed gas to the flare 

(“XCO2” in Equation W-20 of this subpart).

New

58
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(n)(9) §98.236(c)(12)(vii) 

and (viii)

(9) Annual CO2 emissions, in metric tons CO2

(refer to Equation W-20 of this subpart).

(vii) Report uncombusted CO2

emissions in metric tons CO2e 

(refer to Equation W-20 of 

§98.233)

(viii) Report combusted CO2

emissions, in metric tons CO2e 

(refer to Equation W-21 of 

§98.233).

Current

§98.236(n)(10) §98.236(c)(12)(vi) (10) Annual CH4 emissions, in metric tons CH4

(refer to Equation W-19 of this subpart).

Report uncombusted CH4

emissions, in metric tons CO2e 

(refer to Equation W-19 of 

§98.233).

Current

§98.236(n)(11) §98.236(c)(12)(ix) (11) Annual N2O emissions, in metric tons N2O 

(refer to Equation W-40 of this subpart).

Report N2O emissions, in 

metric tons CO2e.

Current

§98.236(n)(12) §98.236(c)(12)(xi) (12) Indicate whether a CEMS was used to measure 

emissions from the flare. If a CEMS was used to 

measure emissions from the flare, then you are not 

required to report N2O and CH4 emissions for the 

flare stack.

In the case that a CEMS is used 

to measure CO2 emissions for 

the flare stack, indicate that a 

CEMS was used in the annual 

report and report the 

combusted CO2 and 

uncombusted CO2 as a 

combined number.

Current

Centrifugal Compressors

§98.236(o) (o) You must indicate whether your facility has 

centrifugal compressors. ...

New

§98.236(o)(1) and 

(o)(1)(i)

(1) Report the information specified in paragraphs 

(o)(1)(i) through (o)(1)(xiv) of this section for each 

centrifugal compressor located at your facility.

(i) Unique name or ID for the centrifugal 

compressor.

New

§98.236(o)(1)(ii) §98.236(c)(13)(i)(F) (ii) Hours in operating-mode. Total time the compressor is 

operating in hours.

Current

59
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(1)(iii) §98.236(c)(13)(iii)(A) (iii) Hours in not-operating-depressurized-mode. Total time in hours the 

compressor is in shutdown, 

depressurized mode.

Current

§98.236(o)(1)(iv) (iv) Indicate whether the compressor was measured 

in operating-mode.

New

§98.236(o)(1)(v) (v) Indicate whether the compressor was measured 

in not-operating-depressurized-mode.

New

§98.236(o)(1)(vi) (vi) Indicate which, if any, compressor sources are 

part of a manifolded group of compressor sources.

New

§98.236(o)(1)(vii) (vii) Indicate which, if any, compressor sources are 

routed to a flare.

New

§98.236(o)(1)(viii) (viii) Indicate which, if any, compressor sources 

have vapor recovery.

New

§98.236(o)(1)(ix) (ix) Indicate which, if any, compressor source

emissions are captured for fuel use or are routed to 

a thermal oxidizer.

New

§98.236(o)(1)(x) (x) Indicate whether the compressor has blind 

flanges installed and associated dates.

New

§98.236(o)(1)(xi) (xi) Indicate whether the compressor has wet or dry 

seals.

New

§98.236(o)(1)(xii) §98.236(c)(13)(i)(A) (xii) If the compressor has wet seals, the number of 

wet seals.

Number of wet seals connected 

to the degassing vent.

Current

§98.236(o)(1)(xiii) (xiii) Power output of the compressor driver (hp). New

§98.236(o)(1)(xiv) (xiv) Indicate whether the compressor had a 

scheduled depressurized shutdown during the 

reporting year.

New

60
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(2)(i) and 

(o)(2)(i)(A)

(i) For each compressor source at each compressor, 

report the information specified in paragraphs 

(o)(2)(i)(A) through (o)(2)( i)(C) of this section.

(A) Centrifugal compressor name or ID. Use the 

same ID as in paragraph (o)(1)(i) of this section.

New

§98.236(o)(2)(i)(B) (B) Centrifugal compressor source (wet seal, 

isolation valve, or blowdown valve).

New

§98.236(o)(2)(i)(C) (C) Unique name or ID for the leak or vent. If the 

leak or vent is connected a manifolded group of 

compressor sources, use the same leak or vent ID 

for each compressor source in the manifolded 

group. If multiple compressor sources are released 

through a single vent for which continuous 

measurements are used, use the same leak or vent 

ID for each compressor source released via the 

measured vent. For a single compressor using as 

found measurements, you must provide a different 

leak or vent ID for each compressor source.

New

§98.236(o)(2)(ii) and 

(o)(2)(ii)(A)

(ii) For each leak or vent, report the information 

specified in paragraphs (o)(2)(ii)(A) through 

(o)(2)(ii)(E) of this section.

(A) Indicate whether the leak or vent is for a single 

compressor source or manifolded group of 

compressor sources and whether the emissions from 

the leak or vent are released to the atmosphere,

routed to a flare, combustion (fuel or thermal 

oxidizer), or vapor recovery.

New

§98.236(o)(2)(ii)(B) (B) Indicate whether an as found measurement(s) as 

identified in §98.233(o)(2) or (o)(4) was conducted

on the leak or vent.

New

61
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(2)(ii)(C) (C) Indicate whether continuous measurements as 

identified in § §98.233(o)(3) or (o)(5) were 

conducted on the leak or vent.

New

§98.236(o)(2)( ii)(D)

and (o)(2)( ii)(D)(1)

§98.236(c)(13)(i)

(G), §98.236(c)(13)(ii)

(C), and 

§98.236(c)(13)(iii)

(C)

(D) Report emissions as specified in paragraphs 

(o)(2)(ii)(D)(1) and (o)(2)(ii)(D)(2) of this section 

for the leak or vent. If the leak or vent is routed to a 

flare, combustion, or vapor recovery, you are not 

required to report emissions under this paragraph.

(1) Annual CO2 emissions, in metric tons CO2.

(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.

Current

§98.236(o)(2)(ii)

(D)(2)

§98.236(c)(13)(i) (G), 

§98.236(c)(13)(ii)

(C), and 

§98.236(c)(13)(iii)

(C)

(2) Annual CH4 emissions, in metric tons CH4. (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.

Revised

62
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(2)( ii)(E) (E) If the leak or vent is routed to flare, combustion, 

or vapor recovery, report the percentage of time that 

the respective device was operational when 

compressor source emissions were routed to the 

device.

New

§98.236(o)(3), 

(o)(3)(i), and 

(o)(3)(i)(A)

(3) If the measurement methods specified in 

paragraphs §98.233(o)(2) or (o)(4) are conducted,

report the information specified in paragraph 

(o)(3)(i) of this section. ...

(i) For each as found measurement performed on a

leak or vent, report the information specified in 

paragraphs (o)(3)(i)(A) through (o)(3)(i)(E) of this 

section.

(A) Name or ID of leak or vent. Use same leak or 

vent ID as in paragraph (o)(2)(i)(C) of this section.

New

§98.236(o)(3)(i)(B) (B) Measurement date. New

§98.236(o)(3)(i)(C) (C) Measurement method. If emissions were not 

detected when using a screening method, report the 

screening method. If emissions were detected using 

a screening method, report only the method 

subsequently used to measure the volumetric 

emissions.

New

§98.236(o)(3)(i)(D) (D) Measured flow rate, in standard cubic feet per 

hour.

New

§98.236(o)(3)(i)(E) (E) For each compressor attached to the leak or

vent, report the compressor mode during which the 

measurement was taken.

New

§98.236(o)(3)(i)(F) (F) If the measurement is for a manifolded group of 

compressor sources, indicate whether the 

measurement location is prior to or after comingling 

with non-compressor emission sources.

New

63
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(3)(ii) and 

(o)(3)(ii)(A)

(ii) For each compressor mode-source combination 

where a reporter emission factor as calculated in 

Equation W-23 was used to calculate emissions in 

Equation W-22, report the information specified in 

paragraphs (o)(3)(ii)(A) through (o)(3)(ii)(D) of this 

section.

(A) The compressor mode-source combination.

New

§98.236(o)(3)(ii)(B) §98.236(c)(13)(i) (E), 

§98.236(c)(13)(ii) (B), 

and §98.236(c)(13)(iii)

(B)

(B) The compressor mode-source combination 

reporter emission factor, in standard cubic feet per 

hour (“EFs,m” in Equation W-23).

(i)(E) Reporter emission factor 

for wet seal oil degassing vents 

in cubic feet per hour (refer to 

Equation W-24 of §98.233).

(ii)(B) Reporter emission factor 

for blowdown vents in cubic 

feet per hour (refer to Equation 

W-24 of §98.233).

(iii)(B) Reporter emission 

factor for isolation valve 

emissions in shutdown, 

depressurized mode in cubic 

feet per hour (refer to Equation 

W-24 of §98.233).

Current

§98.236(o)(3)(ii)(C) (C) The total number of compressors measured in 

the compressor mode-source combination in the 

current reporting year and the preceding two 

reporting years (“Countm” in Equation W-23).

New

§98.236(o)(3)(ii)(D) (D) Indicate whether the compressor mode-source 

combination reporter emission factor is facilityspecific or based on all of the reporter's applicable 

facilities.

New

64
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(4) and 

(o)(4)(i)

(4) If the measurement methods specified in 

paragraphs §98.233(o)(3) or (o)(5) are conducted, 

report the information specified in paragraphs 

(o)(4)(i) through (o)(4)(iv) of this section for each 

continuous measurement conducted on each leak or 

vent associated with each compressor source or 

manifolded group of compressor sources.

(i) Name or ID of leak or vent. Use same leak or 

vent ID as in paragraph (o)(2)(i)(C) of this section.

New

§98.236(o)(4)(ii) (ii) Measured volume of flow during the reporting 

year, in million standard cubic feet.

New

§98.236(o)(4)(iii) (iii) Indicate whether the measured volume of flow 

during the reporting year includes compressor 

blowdown emissions as allowed for in 

§98.233(o)(3)(ii) and (o)(5)(iii).

New

§98.236(o)(4)(iv) (iv) If the measurement is for a manifolded group of 

compressor sources, indicate whether the 

measurement location is prior to or after comingling 

with non-compressor emission sources.

New

§98.236(o)(5) and 

(o)(5)(i)

§98.236(c)(13)(v) (A) (5) Centrifugal compressors with wet seal degassing 

vents in onshore petroleum and natural gas 

production must report the information specified in 

paragraphs (o)(5)(i) through (o)(5)(iii) of this 

section.

(i) Number of centrifugal compressors that have 

wet seal oil degassing vents.

Count of compressors. Revised

§98.236(o)(5)(ii) §98.236(c)(13)(v) (B) (ii) Annual CO2 emissions, in metric tons CO2, 

from centrifugal compressors with wet seal oil 

degassing vents.

Report annual emissions in 

metric tons of CO2e for each 

gas (refer to Equation W-25 of 

§98.233) collectively.

Current

65
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(o)(5)(iii) §98.236(c)(13)(v) (B) (iii) Annual CH4 emissions, in metric tons CH4, 

from centrifugal compressors with wet seal oil 

degassing vents.

Report annual emissions in 

metric tons of CO2e for each 

gas (refer to Equation W-25 of 

§98.233) collectively.

Current

N/A §98.236(c)(13)(i)(B) N/A Fraction of vent gas recovered 

for fuel or sales or flared.

Current

N/A §98.236(c)(13)(i)(C) N/A Annual throughput in million 

scf, use an engineering 

calculation based on best 

available data.

Current

N/A §98.236(c)(13)(i)(D) N/A Type of meters used for 

making measurements.

Current

N/A §98.236(c)(13)(ii)

(A)

N/A Total time in hours the 

compressor is in operating 

mode.

Current

N/A §98.236(c)(13)(iv) N/A Report total annual compressor 

emissions from all modes of 

operation in metric tons of 

CO2e for each gas.

Current

Reciprocating Compressors

§98.236(p) (p) You must indicate whether your facility has 

reciprocating compressors. ...

New

§98.236(p)(1) and 

(p)(1)(i)

(1) Report the information specified in paragraphs 

(p)(1)(i) through (p)(1)(xiv) of this section for each 

reciprocating compressor located at your facility.

(i) Unique name or ID for the reciprocating 

compressor.

New

§98.236(p)(1)(ii) §98.236(c)(14)(i)(B) (ii) Hours in operating-mode. Total time in hours the 

reciprocating compressor is in 

operating mode.

Current

66
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(1)(iii) §98.236(c)(14)(ii) (A) (iii) Hours in standby-pressurized-mode. Total time in hours the 

compressor is in standby, 

pressurized mode.

Current

§98.236(p)(1)(iv) §98.236(c)(14)(iii) (A) (iv) Hours in not-operating-depressurized-mode. Total time the compressor is in 

not operating, depressurized 

mode.

Current

§98.236(p)(1)(v) (v) Indicate whether the compressor was measured 

in operating-mode.

New

§98.236(p)(1)(vi) (vi) Indicate whether the compressor was measured 

in standby-pressurized-mode.

New

§98.236(p)(1)(vii) (vii) Indicate whether the compressor was measured 

in not-operating-depressurized-mode.

New

§98.236(p)(1)(viii) (viii) Indicate which, if any, compressor sources are 

part of a manifolded group of compressor sources.

New

§98.236(p)(1)(ix) (ix) Indicate which, if any, compressor sources are 

routed to a flare.

New

§98.236(p)(1)(x) (x) Indicate which, if any, compressor sources have 

vapor recovery.

New

§98.236(p)(1)(xi) (xi) Indicate which, if any, compressor source

emissions are captured for fuel use or are routed to 

a thermal oxidizer.

New

§98.236(p)(1)(xii) (xii) Indicate whether the compressor has blind 

flanges installed and associated dates.

New

§98.236(p)(1)(xiii) (xiii) Power output of the compressor driver (hp). New

§98.236(p)(1)(xiv) (xiv) Indicate whether the compressor had a 

scheduled depressurized shutdown during the 

reporting year.

New

67
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(2)(i) and 

(p)(2)(i)(A)

(i) For each compressor source at each compressor, 

report the information specified in paragraphs 

(p)(2)(i)(A) through (p)(2)(i)(C) of this section.

(A) Reciprocating compressor name or ID. Use the 

same ID as in paragraph (p)(1)(i) of this section.

New

§98.236(p)(2)(i)(B) (B) Reciprocating compressor source (isolation 

valve, blowdown valve, or rod packing).

New

§98.236(p)(2)(i)(C) (C) Unique name or ID for the leak or vent. If the 

leak or vent is connected to a manifolded group of 

compressor sources, use the same leak or vent ID 

for each compressor source in the manifolded

group. If multiple compressor sources are released 

through a single vent for which continuous 

measurements are used, use the same leak or vent 

ID for each compressor source released via the 

measured vent. For a single compressor using as 

found measurements, you must provide a different 

leak or vent ID for each compressor source.

New

§98.236(p)(2)(ii) and 

(p)(2)(ii)(A)

(ii) For each leak or vent, report the information 

specified in paragraphs (p)(2)(ii)(A) through 

(p)(2)(ii)(E) of this section.

(A) Indicate whether the leak or vent is for a single 

compressor source or manifolded group of 

compressor sources and whether the emissions from 

the leak or vent are released to the atmosphere, 

routed to a flare, combustion (fuel or thermal 

oxidizer), or vapor recovery.

New

§98.236(p)(2)(ii)(B) (B) Indicate whether an as found measurement(s) as 

identified in §98.233(p)(2) or (p)(4) was conducted

on the leak or vent.

New

68
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(2)(ii)(C) (C) Indicate whether continuous measurements as 

identified in §98.233(p)(3) or (p)(5) were conducted

on the leak or vent.

New

§98.236(p)(2)(ii)(D)

and (p)(2)(ii)(D)(1)

§98.236(c)(14)(i)

(C),

§98.236(c)(14)(ii)

(C), and

§98.236(c)(14)(iii)

(C)

(D) Report emissions as specified in paragraphs 

(p)(2)(ii)(D)(1) through (p)(2)(ii)(D)(2) of this 

section for the leak or vent. If the leak or vent is 

routed to flare, combustion, or vapor recovery, you 

are not required to report emissions under this 

paragraph.

(1) Annual CO2 emissions, in metric tons CO2.

(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.

Current

§98.236(p)(2)(ii)

(D)(2)

§98.236(c)(14) (i)

(C),

§98.236(c)(14)(ii)

(C), and

§98.236(c)(14)(iii)

(C)

(2) Annual CH4 emissions, in metric tons CH4. (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.

Revised

69
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(2)( ii)(E) If the leak or vent is routed to flare, combustion, or 

vapor recovery, report the percentage of time that 

the respective device was operational when the 

compressor source emissions were routed to the 

device.

New

§98.236(p)(3),

(p)(3)(i), and 

(p)(3)(i)(A)

(3) If the measurement methods specified in 

paragraphs §98.233(p)(2) or (p)(4) are conducted, 

report the information specified in paragraphs 

(p)(3)(i) of this section. If the calculation specified 

in paragraph §98.233(p)(6)(ii) is performed, report 

the information specified in paragraph (p)(3)(ii) of 

this section.

(i) For each as found measurement performed on a

leak or vent, report the information specified in 

paragraphs (p)(3)(i)(A) through (p)(3)(i)(E) of this 

section.

(A) Name or ID of leak or vent. Use the same leak 

or vent ID as in paragraph (p)(2)(i)(C) of this 

section.

New

§98.236(p)(3)(i)(B) (B) Measurement date. New

§98.236(p)(3)(i)(C) (C) Measurement method. If emissions were not 

detected when using a screening method, report the 

screening method. If emissions were detected using 

a screening method, report only the method used to 

measure the volumetric emissions.

New

§98.236(p)(3)(i)(D) (D) Measured flow rate, in standard cubic feet per 

hour.

New

§98.236(p)(3)(i)(E) (E) For each compressor attached to the leak or

vent, report the compressor mode during which the 

measurement was taken.

New

70
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(3)(i)(F) (F) If the measurement is for a manifolded group of 

compressor sources, indicate whether the 

measurement location is prior to or after comingling 

with non-compressor emissions sources.

New

§98.236(p)(3)(ii) and 

(p)(3)(ii)(A)

(ii) For each compressor mode-source combination 

where a reporter emission factor as calculated in 

Equation W-28 was used to calculate emissions in 

Equation W-27, report the information specified in 

paragraphs (p)(3)(ii)(A) through (p)(3)(ii)(D) of this 

section.

(A) The compressor mode-source combination.

New

§98.236(p)(3)(ii)(B) §98.236(c)(14)(ii) (B), 

and §98.236(c)(14)(iii)

(B)

(B) The compressor mode-source combination 

reporter emission factor, in standard cubic feet per 

hour (“EFs,m” in Equation W-28).

(ii)(B) Reporter emission factor 

for blowdown vents in cubic 

feet per hour (refer to §98.233, 

Equation W-28).

(iii)(B) Reporter emission 

factor for isolation valve 

emissions in not operating, 

depressurized mode in cubic 

feet per hour (refer to Equation 

W-28 of §98.233).

Current

§98.236(p)(3)(ii)(C) (C) The total number of compressors measured in 

the compressor mode-source combination in the 

current reporting year and the preceding two 

reporting years (“Countm” in Equation W-28).

New

§98.236(p)(3)(ii)(D) (D) Indicate whether the compressor mode-source 

combination reporter emission factor is facilityspecific or based on all of the reporter's applicable 

facilities.

New

71
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(p)(4) and 

(p)(4)(i)

(4) If the measurement methods specified in 

paragraphs §98.233(p)(3) or (p)(5) are conducted, 

report the information specified in paragraphs 

(p)(4)(i) through (p)(4)(iv) of this section for each 

continuous measurement conducted on each leak or 

vent associated with each compressor source or 

manifolded group of compressor sources.

(i) Name or ID of leak or vent. Use same leak or 

vent ID as in paragraph (p)(2)(i)(C) of this section.

New

§98.236(p)(4)(ii) (ii) Measured volume of flow during the reporting 

year, in million standard cubic feet.

New

§98.236(p)(4)(iii) (iii) Indicate whether the measured volume of flow 

during the reporting year includes compressor 

blowdown emissions as allowed for in 

§98.233(p)(3)(ii) and (p)(5)(iii).

New

§98.236(p)(4)(iv) (iv) If the measurement is for a manifolded group of 

compressor sources, indicate whether the 

measurement location is prior to or after comingling 

with non-compressor emission sources.

New

§98.236(p)(5) and 

(p)(5)(i)

§98.236(c)(14)(v) (A) (5) Reciprocating compressors in onshore 

petroleum and natural gas production must report 

the information specified in paragraphs (p)(5)(i) 

through (p)(5)(iii) of this section.

(i) Number of reciprocating compressors.

Count of compressors. Current

§98.236(p)(5)(ii) §98.236(c)(14)(v) (B) (ii) Annual CO2 emissions, in metric tons CO2, 

from reciprocating compressors.

Report annual emissions in 

metric tons of CO2e for each 

gas collectively (refer to 

Equation W-29 of §98.233).

Current

§98.236(p)(5)(iii) §98.236(c)(14)(v) (B) (iii) Annual CH4 emissions, in metric tons CH4, 

from reciprocating compressors.

Report annual emissions in 

metric tons of CO2e for each 

gas collectively (refer to 

Equation W-29 of §98.233).

Current

72
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

N/A §98.236(c)(14)(i)(A) N/A Annual throughput in million 

scf, use an engineering 

calculation based on best 

available data.

Current

N/A §98.236(c)(14)(iv) N/A Report total annual compressor 

emissions from all modes of 

operation in metric tons of 

CO2e for each gas

Current

Equipment Leak Surveys

§98.236(q), (q)(1),

and (q)(1)(i)

(q) If your facility is subject to the requirements of 

§98.233(q), then you must report the information 

specified in paragraphs (q)(1) and (q)(2) of this 

section. Natural gas distribution facilities with 

emission sources listed in §98.232(i)(1) must also 

report the information specified in paragraph (q)(3) 

of this section.

(1) You must report the information specified in 

paragraphs (q)(1)(i) and (q)(1)(ii) of this section.

(i) Except as specified in paragraph (q)(1)(ii) of this 

section, the number of complete equipment leak 

surveys performed during the calendar year.

New

§98.236(q)(1)(ii) §98.236(c)(16)(ii) (ii) Natural gas distribution facilities performing

equipment leak surveys across a multiple year leak 

survey cycle must report the number of years in the 

leak survey cycle.

Number of years over which all 

T-D transfer stations will be 

monitored at least once.

Revised

73
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(q)(2) and 

(q)(2)(i)

(2) You must indicate whether your facility contains 

any of the component types listed in §98.233(d)(7), 

(e)(7), (f)(5), (g)(3), (h)(4), or (i)(1), for your 

facility’s industry segment. For each component 

type that is located at your facility, you must report 

the information specified in paragraphs (q)(2)(i) 

through (q)(2)(v) of this section. If a component 

type is located at your facility, and no leaks were

identified from that component, then you must

report the information in paragraphs (q)(2)(i) 

through (q)(2)(v) of this section but report a zero

(“0”) for the information required according to 

paragraphs (q)(2)(iii), (q)(2)(iv), and (q)(2)(v) of 

this section.

(i) Component type.

New

§98.236(q)(2)(ii) §98.236(c)(15)(i)(A) (ii) Total number of the survey component type that 

were identified as leaking in the calendar year (“xp” 

in Equation W-30 of this subpart for the component 

type).

Total count of leaks found in 

each complete survey listed by 

date of survey and each 

component type for which 

there is a leaker emission factor 

in Tables W-2, W-3, W-4, W5, W-6, and W-7 of this 

subpart.

Current

§98.236(q)(2)(iii) (iii) Average time the surveyed components are 

assumed to be leaking and operational, in hours 

(average of Tp,z from Equation W-30 of this subpart

for the component type).

New

§98.236(q)(2)(iv) §98.236(c)(15)(i)(C) (iv) Annual CO2 emissions, in metric tons CO2, for 

the component type as calculated using Equation 

W-30 (for surveyed components only).

Annual CO2 and CH4

emissions in metric tons CO2e 

for each gas (refer to Equation 

W-30A of §98.233), by 

component type

Current

74
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(q)(2)(v) §98.236(c)(15)(i)(C) (v) Annual CH4 emissions, in metric tons CH4, for 

the component type as calculated using Equation 

W-30 (for surveyed components only).

Annual CO2 and CH4

emissions in metric tons CO2e 

for each gas (refer to Equation 

W-30A of §98.233), by 

component type

Current

§98.236(q)(3) and 

(q)(3)(i)

§98.236(c)(16)(iii) (3) Natural gas distribution facilities with emission 

sources listed in §98.232(i)(1) must also report the 

information specified in paragraphs (q)(3)(i) 

through (q)(3)(viii) and, if applicable, (q)(3)(ix) of 

this section.

(i) Number of above grade transmission-distribution 

transfer stations surveyed in the calendar year.

Number of T-D stations 

monitored in calendar year.

Current

§98.236(q)(3)(ii) (ii) Number of meter/regulator runs at above grade 

transmission-distribution transfer stations surveyed 

in the calendar year (“CountMR,y” from Equation W31 of this subpart, for the current calendar year). 

New

§98.236(q)(3)(iii) (iii) Average time that meter/regulator runs 

surveyed in the calendar year were operational, in 

hours (average of “Tw,y” from Equation W-31 of 

this subpart, for the current calendar year).

New

§98.236(q)(3)(iv) §98.236(c)(16)(ii) (iv) Number of above grade transmissiondistribution transfer stations surveyed in the current 

leak survey cycle.

(iii) Number of T-D stations 

monitored in calendar year.

Current

§98.236(q)(3)(v) (v) Number of meter/regulator runs at above grade 

transmission-distribution transfer stations surveyed 

in current leak survey cycle (sum of “CountMR,y”

from Equation W-31 of this subpart, for all calendar 

years in the current leak survey cycle).

New

75
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(q)(3)(vi) (vi) Average time that meter/regulator runs 

surveyed in the current leak survey cycle were 

operational, in hours (average of “Tw,y” from

Equation W-31 of this subpart, for all years 

included in the leak survey cycle).

New

§98.236(q)(3)(vii) §98.236(c)(16)(viii) (vii) Meter/regulator run CO2 emission factor based 

on all surveyed transmission-distribution transfer 

stations in the current leak survey cycle, in standard 

cubic feet of CO2 per operational hour of all 

meter/regulator runs (“EFs,MR,CO2” calculated using 

Equation W-31 of this subpart).

Leak factor for meter/regulator 

run developed in Equation W32 of §98.233.

Current

§98.236(q)(3)(viii) §98.236(c)(16)(viii) (viii) Meter/regulator run CH4 emission factor 

based on all surveyed transmission-distribution 

transfer stations in the current leak survey cycle, in 

standard cubic feet of CH4 per operational hour of 

all meter/regulator runs (“EFs,MR,CH4” calculated 

using Equation W-31 of this subpart).

Leak factor for meter/regulator 

run developed in Equation W32 of §98.233.

Current

§98.236(q)(3)(ix)

and (q)(3)(ix)(A)

(ix) If your natural gas distribution facility performs 

equipment leak surveys across a multiple year leak 

survey cycle, you must report:

(A) The total number of meter/regulator runs at 

above grade transmission-distribution transfer 

stations at your facility (“CountMR” in Equation W32B of this subpart).

New

§98.236(q)(3)(ix)(B) (B) Average estimated time that each 

meter/regulator run at above grade transmissiondistribution transfer stations was operational in the 

calendar year, in hours per meter/regulator run 

(“Tw,avg” in Equation W-32B of this subpart).

New

76
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(q)(3)(ix)(C) §98.236(c)(16)(xvii) (C) Annual CO2 emissions, in metric tons CO2, for 

all above grade transmission-distribution transfer 

stations at your facility.

Annual CO2 and CH4 

emissions, in metric tons CO2e 

for each gas, from all above 

grade T-D transfer stations 

combined.

Current

§98.236(q)(3)(ix)(D) §98.236(c)(16)(xvii) (D) Annual CH4 emissions, in metric tons CH4, for 

all above grade transmission-distribution transfer 

stations at your facility.

Annual CO2 and CH4 

emissions, in metric tons CO2e 

for each gas, from all above 

grade T-D transfer stations 

combined.

Current

N/A §98.236(c)(15)(i)(B) N/A For onshore natural gas 

processing, range of 

concentrations of CH4 and CO2

(refer to Equation W-30A of 

§98.233).

Current

Equipment Leaks by Population Count

§98.236(r) and (r)(1) (r) If your facility is subject to the requirements of 

§98.233(r), then you must report the information 

specified in paragraph (r)(1) through (r)(3) of this 

section, as applicable. 

(1) You must indicate whether your facility 

contains any of the emission source types required 

to use Equation W-32A of this subpart. You must 

report the information specified in paragraphs 

(r)(1)(i) through (r)(1)(v) of this section separately 

for each emission source type required to use 

Equation W-32A of this subpart that is located at 

your facility. Onshore petroleum and natural gas 

production facilities must report the information 

specified in paragraphs (r)(1)(i) through (r)(1)(v) of 

this section separately by component type, service 

type, and geographic location (i.e., Eastern U.S or 

Western U.S.).

New

77
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(r)(1)(i) (i) Emission source type. Onshore petroleum and 

natural gas production facilities must report the 

component type, service type and geographic 

location.

New

§98.236(r)(1)(ii) §98.236(c)(15)(ii) (A), 

§98.236(c)(16)(iv), 

§98.236(c)(16)(vi), 

§98.236(c)(16)(ix), 

§98.236(c)(16)(x), 

§98.236(c)(16)(xi), 

§98.236(c)(16)(xii), 

§98.236(c)(16)(xiii), 

§98.236(c)(16)(xiv), 

§98.236(c)(16)(xv), 

and 

§98.236(c)(16)(xvi)

(ii) Total number of the emission source type at the 

facility (“Counte” in Equation W-32A of this 

subpart).

(15)(ii)(A) 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.

(16)(iv) Total number of below 

grade T-D transfer stations at 

the facility.

(16)(vi) Total number of below 

grade metering-regulating 

stations (this count will include 

below grade T-D transfer 

stations) at the facility.

(16)(ix) Number of miles of 

unprotected steel distribution 

mains.

(16)(x) Number of miles of 

protected steel distribution 

mains.

(16)(xi) Number of miles of 

plastic distribution mains.

(16)(xii) Number of miles of 

cast iron distribution mains.

(16)(xiii) Number of 

unprotected steel distribution 

services.

Current

78
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

(16)(xiv) Number of protected 

steel distribution services.

(16)(xv) Number of plastic 

distribution services.

(16)(xvi) Number of copper 

distribution services.

§98.236(r)(1)(iii) (iii) Average estimated time that the emission 

source type was operation in the calendar year, in 

hours (“Te” in Equation W-32A of this subpart).

New

79
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(r)(1)(iv) §98.236(c)(15)(ii) (C), 

§98.236(c)(16)(xviii), 

§98.236(c)(16)(xix), 

§98.236(c)(16)(xx), 

§98.236(c)(16)(xxi), 

§98.236(c)(16)(xxii)

(iv) Annual CO2 emissions, in metric tons CO2, for 

the emission source type.

(15)(ii)(C) Annual CO2 and 

CH4 emissions, in metric tons 

CO2e for each gas (refer to 

Equation W-31 of §98.233), by 

component type.

(16)(xviii) Annual CO2 and 

CH4 emissions, in metric tons 

CO2e for each gas, from all 

below grade T-D transfer 

stations combined.

(16)(xix) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all above 

grade metering-regulating 

stations (including T-D transfer 

stations) combined.

(16)(xx) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all below 

grade metering-regulating 

stations (including T-D transfer 

stations) combined.

(16)(xxi) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all 

distribution mains combined.

(16)(xxii) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all 

distribution services combined.

Current

80
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(r)(1)(v) §98.236(c)(15)(ii) (C) , 

§98.236(c)(16)(xviii), 

§98.236(c)(16)(xix), 

§98.236(c)(16)(xx), 

§98.236(c)(16)(xxi), 

§98.236(c)(16)(xxii)

(v) Annual CH4 emissions, in metric tons CH4, for 

the emission source type.

(15)(ii)(C) Annual CO2 and

CH4 emissions, in metric tons 

CO2e for each gas (refer to 

Equation W-31 of §98.233), by 

component type.

(16)(xviii) Annual CO2 and 

CH4 emissions, in metric tons 

CO2e for each gas, from all 

below grade T-D transfer 

stations combined.

(16)(xix) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all above 

grade metering-regulating 

stations (including T-D transfer 

stations) combined.

(16)(xx) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all below 

grade metering-regulating 

stations (including T-D transfer 

stations) combined.

(16)(xxi) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all 

distribution mains combined.

(16)(xxii) Annual CO2 and CH4

emissions, in metric tons CO2e 

for each gas, from all 

distribution services combined.

Current

81
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(r)(2) and 

(r)(2)(i)

§98.236(c)(16)(i) (2) Natural gas distribution facilities must also 

report the information specified in paragraphs 

(r)(2)(i) through (r)(2)(v) of this section.

(i) Number of above grade transmission-distribution 

transfer stations at the facility.

Total number of above grade 

T-D transfer stations in the 

facility.

Current

§98.236(r)(2)(ii) §98.236(c)(16)(v) (ii) Number of above grade metering-regulating 

stations that are not transmission-distribution 

transfer stations at the facility.

Total number of above grade 

metering-regulating stations 

(this count will include above 

grade T-D transfer stations) in 

the facility.

Current

§98.236(r)(2)(iii) (iii) Total number of meter/regulator runs at above 

grade metering-regulating stations that are not 

above grade transmission-distribution transfer 

stations (“CountMR” in Equation W-32B of this 

subpart).

New

§98.236(r)(2)(iv) (iv) Average estimated time that each 

meter/regulator run at above grade meteringregulating stations that are not above grade 

transmissions-distribution transfer stations was 

operational in the calendar year, in hours per 

meter/regulator run (“Tw,avg” in Equation W-32B of 

this subpart).

New

§98.236(r)(2)(v) and 

(r)(2)(v)(A)

(v) If your facility has above grade meteringregulating stations that are not above grade 

transmission-distribution transfer stations and your 

facility also has above grade transmissiondistribution transfer stations, you must also report:

(A)_Annual CO2 emissions, in metric tons CO2, 

from above grade metering-regulating stations that 

are not above grade transmission-distribution 

transfer stations.

New

82
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(r)(2)(v)(B) (B) Annual CH4 emissions, in metric tons CH4, 

from above grade metering-regulating stations that 

are not above grade transmission-distribution 

transfer stations.

New

§98.236(r)(3) and 

(r)(3)(i)

(3) Onshore petroleum and natural gas production 

facilities must also report the information specified 

in paragraphs (r)(3)(i) and (r)(3)(ii) of this section.

(i) Calculation method used. 

New

§98.236(r)(3)(ii) and 

(r)(3)(ii)(A)

(ii) Onshore petroleum and natural gas production 

facilities must report the information specified in 

paragraphs (r)(3)(ii)(A) and (r)(3)(ii)(B) of this 

section, for each major equipment type, production 

type (i.e., natural gas or crude oil), and geographic 

location combination in Tables W-1B and W-1C of 

this subpart.

(A) An indication of whether the facility contains 

the major equipment type.

New

§98.236(r)(3)(ii)(B) §98.236(c)(15)(ii) (B) (B) If the facility does contain the equipment type, 

the count of the major equipment type.

Total count for each type of 

major equipment in Table W1B and Table W-1C of this 

subpart, by facility.

Current

83
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Offshore Petroleum and Natural Gas Production

§98.236(s)(1), 

(s)(2), and (s)(3)

§98.236(b) (s) You must report the information specified in 

paragraphs (s)(1) through (s)(3) of this section for 

each emission source type listed in the most recent 

BOEMRE study. 

(1) Annual CO2 emissions, in metric tons CO2. 

(2) Annual CH4 emissions, in metric tons CH4. 

(3) Annual N2O emissions, in metric tons N2O.

Report emissions of CH4, CO2

and N2O as applicable to the 

source type (in metric tons 

CO2e per year at standard 

conditions) individually for all 

of the emissions source types 

listed in the most recent 

BOEMRE study.

Current

EOR Injection Pumps

§98.236(w) (w) You must indicate whether CO2 EOR injection 

was used at your facility during the calendar year, 

and if any EOR injection pump blowdowns 

occurred during the year. If any EOR injection 

pump blowdowns occurred during the calendar 

year, then you must report the information specified 

in paragraphs (w)(1) through (w)(8) of this section 

for each EOR injection pump system.

New

§98.236(w)(1) (1) Sub-basin ID. New

§98.236(w)(2) (2) EOR injection pump system identifier. New

§98.236(w)(3) §98.236(c)(17)(i) (3) Pump capacity, in barrels per day. Pump capacity, in barrels per 

day

Current

§98.236(w)(4) §98.236(c)(17)(ii) (4) Total volume of EOR injection pump system 

equipment chambers, in cubic feet (“Vv” in 

Equation W-37 of this subpart).

Volume of critical phase gas 

between isolation valves.

Revised

§98.236(w)(5) §98.236(c)(17)(iii) (5) Number of blowdowns for the EOR injection 

pump system in the calendar year.

Number of blowdowns per 

year.

Current

§98.236(w)(6) §98.236(c)(17)(iv) (6) Density of critical phase EOR injection gas, in 

kilograms per cubic foot (“Rc” in Equation W-37 of 

this subpart).

Critical phase EOR injection 

gas density.

Current

84
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(w)(7) (7) Mass fraction of CO2 in critical phase EOR 

injection gas (“GHGCO2” in Equation W-37 of this 

subpart).

New

§98.236(w)(8) §98.236(c)(17)(v) (8) Annual CO2 emissions, in metric tons CO2, from 

EOR injection pump system blowdowns.

For each EOR pump, report 

annual CO2 emissions, 

expressed in metric tons CO2e 

for each gas.

Current

EOR Hydrocarbon Liquids

§98.236(x) (x) You must indicate whether hydrocarbon liquids 

were produced through EOR operations. ...

New

§98.236(x) and 

(x)(1)

(x) ... If hydrocarbon liquids were produced 

through EOR operations, you must report the 

information specified in paragraphs (x)(1) through 

(x)(4) of this section for each sub-basin category 

with EOR operations.

(1) Sub-basin ID. 

New

§98.236(x)(2) §98.236(c)(18)(i) (2) Total volume of hydrocarbon liquids produced 

through EOR operations in the calendar year, in 

barrels (“Vhl” in Equation W-38 of this subpart).

Volume of crude oil produced 

in barrels per year.

Current

§98.236(x)(3) §98.236(c)(18)(ii) (3) Average CO2 retained in hydrocarbon liquids 

downstream of the storage tank, in metric tons per 

barrel under standard conditions (“Shl” in Equation 

W-38 of this subpart).

Amount of CO2 retained in 

hydrocarbon liquids in metric 

tons per barrel, under standard 

conditions.

Current

§98.236(x)(4) §98.236(c)(18)(iii) (4) Annual CO2 emissions, in metric tons CO2, from 

CO2 retained in hydrocarbon liquids produced 

through EOR operations downstream of the storage 

tank (“MassCO2” in Equation W-38 of this subpart).

Report annual CO2 emissions 

at the sub-basin level , 

expressed in metric tons CO2e.

Current

85
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Combustion Equipment for Onshore Petroleum and Natural Gas Production and Natural Gas Distribution Facilities

§98.236(z) (z) If your facility is required by §98.232(c)(22) or 

(i)(7) to report emissions from combustion 

equipment, then you must indicate whether your

facility has any combustion units subject to 

reporting according to paragraphs (a)(1)(xvii) or 

(a)(8)(i) of this section. ...

New

§98.236(z) and (z)(1) (z) ... If your facility contains any combustion units

subject to reporting according to paragraphs 

(a)(1)(xvii) or (a)(8)(i) of this section, then you 

must report the information specified in paragraphs 

(z)(1) and (z)(2) of this section, as applicable.

(1) Indicate whether the combustion units include:

external fuel combustion units with a rated heat 

capacity less than or equal to 5 million Btu per 

hour; or, internal fuel combustion units that are not

compressor-drivers, with a rated heat capacity less 

than or equal to 1 mmBtu per hour (or the 

equivalent of 130 horsepower). ...

New

§98.236(z)(1) and 

(z)(1)(i)

(1) ... If the facility contains external fuel 

combustion units with a rated heat capacity less 

than or equal to 5 million Btu per hour or internal 

fuel combustion units that are not compressordrivers, with a rated heat capacity less than or equal 

to 1 million Btu per hour (or the equivalent of 130 

horsepower), then you must report the information 

specified in paragraphs (z)(1)(i) and (z)(1)(ii) of 

this section for each unit type.

(i) The type of combustion unit.

New

86
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(z)(1)(ii) §98.236(c)(19)(i) and 

(v)

(ii) The total number of combustion units. (i) Cumulative number of 

external fuel combustion units 

with a rated heat capacity equal 

to or less than 5 mmBtu/hr, by 

type of unit.

(v) Cumulative number of 

internal fuel combustion units, 

not compressor-drivers, with a 

rated heat capacity equal to or 

less than 1 mmBtu/hr or 130 

horsepower, by type of unit.

Revised

§98.236(z)(2) (2) Indicate whether the combustion units include:

external fuel combustion units with a rated heat

capacity greater than 5 million Btu per hour;

internal fuel combustion units that are not

compressor-drivers, with a rated heat capacity 

greater than 1 million Btu per hour (or the 

equivalent of 130 horsepower); or, internal fuel 

combustion units of any heat capacity that are

compressor-drivers. ...

New

§98.236(z)(2) and 

(z)(2)(i)

§98.236(c )(19)(i) and 

(ii)

(2) ... If your facility contains: external fuel 

combustion units with a rated heat capacity greater 

than 5 mmBtu/hr; internal fuel combustion units

that are not compressor-drivers, with a rated heat 

capacity greater than 1 million Btu per hour (or the 

equivalent of 130 horsepower); or internal fuel 

combustion units of any heat capacity that are

compressor-drivers, then you must report the 

information specified in paragraphs (z)(2)(i) 

through (z)(2)(vi) for each combustion unit type 

and fuel type combination. 

(i) The type of combustion unit.

(i) Cumulative number of 

external fuel combustion units 

with a rated heat capacity equal 

to or less than 5 mmBtu/hr, by 

type of unit.

(ii) Cumulative number of 

external fuel combustion units 

with a rated heat capacity 

larger than 5 mmBtu/hr, by 

type of unit.

Revised

§98.236(z)(2)(ii) (ii) The type of fuel combusted. New

87
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(z)(2)(iii) §98.236(c )(19)(iv) and 

(c)(19)(vii)

(iii) The quantity of fuel combusted in the calendar 

year, in thousand standard cubic feet, gallons, or 

tons.

(iv) Cumulative volume of fuel 

combusted in external fuel 

combustion units with a rated 

heat capacity larger than 5 

mmBtu/hr, by fuel type.

(vii) Cumulative volume of 

fuel combusted in internal 

combustion units with a rated 

heat capacity larger than 1 

mmBtu/hr or 130 horsepower, 

by fuel type.

Current

§98.236(z)(2)(iv) §98.236(c )(19)(iii) 

and (c)(19)(vi)

(iv) Annual CO2 emissions, in metric tons CO2, 

calculated according to §98.233(z)(1) and (z)(2).

(iii) Report annual CO2, CH4, 

and N2O emissions from 

external fuel combustion units 

with a rated heat capacity 

larger than 5 mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

(vi) Report annual CO2, CH4, 

and N2O emissions from 

internal combustion units 

greater than 1mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

Current

88
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(z)(2)(v) §98.236(c)(19)(iii) and 

(c)(19)(vi)

(v) Annual CH4 emissions, in metric tons CH4, 

calculated according to §98.233(z)(1) and (z)(2).

(iii) Report annual CO2, CH4, 

and N2O emissions from 

external fuel combustion units 

with a rated heat capacity 

larger than 5 mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

(vi) Report annual CO2, CH4, 

and N2O emissions from 

internal combustion units 

greater than 1mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

Current

§98.236(z)(2)(vi) §98.236(c)(19)(iii) and 

(c)(19)(vi)

(vi) Annual N2O emissions, in metric tons N2O, 

calculated according to §98.233(z)(1) and (z)(2).

(iii) Report annual CO2, CH4, 

and N2O emissions from 

external fuel combustion units 

with a rated heat capacity 

larger than 5 mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

(vi) Report annual CO2, CH4, 

and N2O emissions from 

internal combustion units 

greater than 1mmBtu/hr, 

expressed in metric tons CO2e 

for each gas, by type of unit.

Current

N/A §98.236(c)(19)(ii) N/A Cumulative number of external 

fuel combustion units with a 

rated heat capacity larger than 

5 mmBtu/hr, by type of unit.

Current

89
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Onshore Petroleum and Natural Gas Production

§98.236(aa), (aa)(1), 

(aa)(1)(i), and 

(aa)(1)(i)(A)

(aa) Each facility must report the information 

specified in paragraphs (aa)(1) through (aa)(9) of 

this section, for each applicable industry segment, 

by using best available data. If a quantity required 

to be reported is zero, you must report zero as the 

value.

(1) For onshore petroleum and natural gas 

production, report the data specified in paragraphs 

(aa)(1)(i) and (aa)(1)(ii) of this section.

(i) Report the information specified in paragraphs 

(aa)(1)(i)(A) through (aa)(1)(i)(C) of this section for 

the basin as a whole.

(A) The quantity of gas produced in the calendar

year from wells, in thousand standard cubic feet. 

This includes gas that is routed to a pipeline, vented 

or flared, or used in field operations. This does not 

include gas injected back into reservoirs or 

shrinkage resulting from lease condensate 

production.

New

§98.236(aa)(1)(i)(B) (B) The quantity of gas produced in the calendar

year for sales, in thousand standard cubic feet.

New

§98.236(aa)(1)(i)(C) (C) The quantity of crude oil and condensate 

produced in the calendar year for sales, in barrels.

New

§98.236(aa)(1)(ii)

and (aa)(1)(ii)(A)

(ii) Report the information specified in paragraphs 

(aa)(1)(ii)(A) through (aa)(1)(ii)(M) of this section 

for each unique sub-basin category.

(A) State.

New

§98.236(aa)(1)(ii)(B) (B) County. New

§98.236(aa)(1)(ii)(C) (C) Formation type. New

90
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(aa)(1)(ii)(D) (D) The number of producing wells at the end of the 

calendar year (exclude only those wells 

permanently taken out of production, i.e., plugged 

and abandoned).

New

§98.236(aa)(1)(ii)(E) (E) The number of producing wells acquired during 

the calendar year.

New

§98.236(aa)(1)(ii)(F) (F) The number of producing wells divested during 

the calendar year.

New

§98.236(aa)(1)(ii (G) (G) The number of wells completed during the 

calendar year.

New

§98.236(aa)(1)(ii)(H) (H) The number of wells permanently taken out of 

production (i.e., plugged and abandoned) during the 

calendar year.

New

§98.236(aa)(1)(ii)(I) (I) Average mole fraction of CH4 in produced gas. New

§98.236(aa)(1)(ii)(J) (J) Average mole fraction of CO2 in produced gas. New

§98.236(aa)(1)(ii)(K) §98.236(e) (K) If an oil sub-basin, report the average GOR of 

all wells, in thousand standard cubic feet per barrel.

For onshore petroleum and 

natural gas production, report . 

. . best available estimate of gas 

to oil ratio, ...for each oil subbasin category.

Current

§98.236(aa)(1)(ii)(L) §98.236(e) (L) If an oil sub-basin, report the average API 

gravity of all wells.

For onshore petroleum and 

natural gas production, report 

the best available estimate of 

API gravity, . . .for each oil 

sub-basin category.

Current

§98.236(aa)(1)(ii)

(M)

§98.236(e) (M) If an oil sub-basin, report average low pressure 

separator pressure, in pounds per square inch gauge.

For onshore petroleum and 

natural gas production, report 

the . . .best available estimate 

of average low pressure 

separator pressure for each oil 

sub-basin category.

Current

91
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Offshore Petroleum and Natural Gas Production

§98.236(aa)(2) and 

(aa)(2)(i)

(2) For offshore production, report the quantities 

specified in paragraphs (aa)(2)(i) and (aa)(2)(ii) of 

this section.

(i) The total quantity of gas handled at the offshore 

platform in the calendar year, in thousand standard 

cubic feet, including production volumes and 

volumes transferred via pipeline from another 

location.

New

§98.236(aa)(2)(ii) (ii) The total quantity of oil and condensate handled 

at the offshore platform in the calendar year, in

barrels, including production volumes and volumes 

transferred via pipeline from another location..

New

Onshore Natural Gas Processing

§98.236(aa)(3) and 

(aa)(3)(i)

(3) For natural gas processing, report the 

information specified in paragraphs (aa)(3)(i) 

through (aa)(3)(vii) of this section.

(i) The quantity of natural gas received at the gas 

processing plant in the calendar year, in thousand 

standard cubic feet.

New

§98.236(aa)(3)(ii) (ii) The quantity of processed (residue) gas leaving 

the gas processing plant in the calendar year, in 

thousand standard cubic feet.

New

§98.236(aa)(3)(iii) (iii) The cumulative quantity of all NGLs (bulk and 

fractionated) received at the gas processing plant in 

the calendar year, in barrels.

New

§98.236(aa)(3)(iv) (iv) The cumulative quantity of all NGLs (bulk and 

fractionated) leaving the gas processing plant in the 

reporting year, in barrels.

New

§98.236(aa)(3)(v) (v) Average mole fraction of CH4 in natural gas 

received.

New

92
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(aa)(3)(vi) (vi) Average mole fraction of CO2 in natural gas 

received.

New

§98.236(aa)(3)(vii) (vii) Indicate whether the facility fractionates 

NGLs.

New

Onshore Natural Gas Transmission Compression

§98.236(aa)(4) and 

(aa)(4)(i)

(4) For natural gas transmission compression, report 

the quantity specified in paragraphs (aa)(4)(i) 

through (aa)(4)(v) of this section.

(i) The quantity of gas transported through the 

compressor station in the calendar year, in thousand 

standard cubic feet.

New

§98.236(aa)(4)(ii) (ii) Number of compressors. New

§98.236(aa)(4)(iii) (iii) Total compressor power rating of all 

compressors combined, in horsepower.

New

§98.236(aa)(4)(iv) (iv) Average upstream pipeline pressure, in pounds 

per square inch gauge.

New

§98.236(aa)(4)(v) (v) Average downstream pipeline pressure, in 

pounds per square inch gauge.

New

Underground Natural Gas Storage

§98.236(aa)(5) and 

(aa)(5)(i)

(5) For underground natural gas storage, report the 

quantities specified in paragraphs (aa)(5)(i) through 

(aa)(5)(iii) of this section.

(i) The quantity of gas injected into storage in the 

calendar year, in thousand standard cubic feet.

New

§98.236(aa)(5)(ii) (ii) The quantity of gas withdrawn from storage in 

the calendar year, in thousand standard cubic feet.

New

§98.236(aa)(5)(iii) (iii) Total storage capacity, in thousand standard 

cubic feet.

New

93
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

LNG Import and Export Equipment

§98.236(aa)(6) (6) For LNG import equipment, report the quantity 

of LNG imported in the calendar year, in thousand 

standard cubic feet.

New

§98.236(aa)(7) (7) For LNG export equipment, report the quantity 

of LNG exported in the calendar year, in thousand 

standard cubic feet.

New

LNG Storage

§98.236(aa)(8) and 

(aa)(8)(i)

(8) For LNG storage, report the quantities specified 

in paragraphs (aa)(8)(i) through (aa)(8)(iii) of this 

section.

(i) The quantity of LNG added into storage in the 

calendar year, in thousand standard cubic feet.

New

§98.236(aa)(8)(ii) (ii) The quantity of LNG withdrawn from storage in 

the calendar year, in thousand standard cubic feet.

New

§98.236(aa)(8)(iii) (iii) Total storage capacity, in thousand standard 

cubic feet.

New

Natural Gas Distribution

§98.236(aa)(9) and 

(aa)(9)(i)

(9) For natural gas distribution, report the quantities 

specified in paragraphs (aa)(9)(i) through 

(aa)(9)(vii) of this section.

(i) The quantity of natural gas received at all 

custody transfer stations in the calendar year, in 

thousand standard cubic feet. This value may 

include meter corrections, but only for the calendar

year covered by the annual report.

New

§98.236(aa)(9)(ii) (ii) The quantity of natural gas withdrawn from insystem storage in the calendar year, in thousand 

standard cubic feet.

New

94
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

§98.236(aa)(9)(iii) (iii) The quantity of natural gas added to in-system 

storage in the calendar year, in thousand standard 

cubic feet.

New

§98.236(aa)(9)(iv) (iv) The quantity of natural gas delivered to end 

users, in thousand standard cubic feet. This value 

does not include stolen gas, or gas that is otherwise 

unaccounted for.

New

§98.236(aa)(9)(v) (v) The quantity of natural gas transferred to third 

parties such as other LDCs or pipelines, in thousand 

standard cubic feet. This value does not include 

stolen gas, or gas that is otherwise unaccounted for.

New

§98.236(aa)(9)(vi) (vi) The quantity of natural gas consumed by the 

LDC for operational purposes, in thousand standard 

cubic feet.

New

§98.236(aa)(9)(vii) (vii) The estimated quantity of gas stolen in the 

calendar year, in thousand standard cubic feet.

New

Missing Data Provisions

§98.236(bb), and 

(bb)(1)

(bb) For any missing data procedures used, report 

the information in paragraphs §98.3(c)(8) except as 

provided in paragraphs (bb)(1) and (bb)(2) in this 

section.

(1) For quarterly measurements, report the total 

number of quarters that a missing data procedure 

was used for each data element rather than the total 

number of hours.

New

§98.236(bb)(2) (2) For annual or biannual (once every two years) 

measurements, you do not need to report the 

number of hours that a missing data procedure was 

used for each data element.

New

95
Table 1. Final Changes to the Subpart W Reporting Requirements (continued)

Final Citation 

Reference

Current Citation 

Reference Final Rule Text Current Rule Text

New, Revised, or 

Current 

Requirement

Reporting Date for Delayed Reporting Elements

§98.236(cc) (cc) If you elect to delay reporting the information 

in paragraph (g)(5)(i), (g)(5)(ii), (h)(1)(iv), 

(h)(2)(iv), (j)(1)(iii), (j)(2)(i)(A), (l)(1)(iv), 

(l)(2)(iv), (l)(3)(iii), (l)(4)(iii), (m)(5), or (m)(6) of 

this section, you must report the information 

required in that paragraph no later than the date 2 

years following the date specified in §98.3(b) 

introductory text.

New

96