MEMORANDUM 

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

From: Alexis McKittrick and Mark DeFigueiredo, EPA/CCD 

Date: February 20, 2014 

Subject: Data Category Assignments and Confidentiality Determinations for All Data 

Elements (excluding inputs to emission equations) in the Proposed “Revisions and 

Confidentiality Determinations for Petroleum and Natural Gas Systems” 

In the proposed rulemaking titled “Revisions and Confidentiality Determinations for Petroleum 

and Natural Gas Systems (referred hereafter as the Subpart W 2014 Proposed Amendments), the 

EPA is proposing revisions to the current subpart W reporting requirements. These revisions 

include revisions to existing reporting requirements and the addition of several new data 

elements. In conjunction with the proposed revisions, the EPA is proposing confidentiality 

determinations for proposed new and substantially revised data elements (i.e., those that would 

require additional or different data to be reported), except for those proposed to be assigned to 

the inputs to emission equations data category. In this memorandum, we provide a list of all the 

proposed new and substantially revised data elements (excluding those proposed to be assigned 

to the inputs to emission equations data category), the proposed confidentiality determinations, 

and where appropriate, the data category assignments. 

Table A-1 shows the proposed category assignments for all new and substantially revised data 

elements assigned to data categories for which a categorical confidentiality determination was 

previously finalized in 2011. As explained in the preamble to the Subpart W 2014 Proposed 

Amendments (“the preamble”), for data elements listed in Table A-1, the EPA is proposing to 

apply the categorical determinations established in 2011. Descriptions of these data categories, 

the categorical confidentiality determinations made for these categories, and the rationale behind 

those determinations are provided in preambles to the proposed and final rulemakings: 

“Proposed Confidentiality Determinations for Data Required Under the Mandatory Greenhouse 

Gas Reporting Rule and Proposed Amendment to Special Rules Governing Certain Information 

Obtained Under the Clean Air Act” published on July 7, 2010 (75 FR 39094); and 

“Confidentiality Determinations for Data Required under the Mandatory Greenhouse Gas 

Reporting Rule and Amendment to Special Rules Governing Certain Information Obtained under 

the Clean Air Act” published on May 26, 2011 (76 FR 30782). For discussion of the proposed 

new and substantially revised data elements, their proposed category assignments, and the 

proposed application of the categorical confidentiality determinations, see Section III.B of the 

preamble to the Subpart W 2014 Proposed Amendments. 
2 

Table A-2 shows the proposed categorical assignments and confidentiality determinations for all 

new and substantially revised data elements assigned to the data categories “Unit/Process 

‘Operating’ Characteristics That Are Not Inputs to Emission Equations” and “Unit/Process 

‘Static’ Characteristics that Are Not Inputs to Emission Equations.” As explained in the 

preamble to this proposed rulemaking, the EPA did not establish categorical confidentiality 

determinations for these two data categories in 2011, and confidentiality determinations for data 

elements assigned to these two data categories are made on a case-by-case basis for these data 

elements, as explained in the preamble. See Section III.C of the preamble to the Subpart W 2014 

Proposed Amendments for more information on the proposed new and substantially revised data 

elements assigned to these two data categories, their proposed confidentiality determinations, 

and the rationales for the determinations. 

Table A-3 shows the proposed confidentiality determinations for 12 data elements. Eleven of 

these are new data elements for which no categorical assignment is proposed. The table also 

includes the re-proposed confidentiality determination for one data element previously assigned 

to the category “Production/Throughput Data that are Not Inputs to Emission Equations” and for 

which EPA is proposing to remove the previous categorical assignment and application of the 

categorical determination. For more information on these 12 proposed new data elements and 

one existing revised data element, the proposed (or re-proposed) confidentiality determinations, 

and rationale supporting the determinations, see Section III.D of the preamble to the Subpart W 

2014 Proposed Amendments. 

The Subpart W 2014 Proposed Amendments also include minor revisions to current subpart W 

reporting requirements and several new data elements that are proposed to be assigned to the 

inputs to emission equations data category. These data elements are not listed in this 

memorandum. As explained in the preamble, the minor revisions consist of changes that clarify 

existing reporting requirements and would not require reporting of different or additional data. 

Therefore, no confidentiality determination is proposed in conjunction with these minor 

revisions, and the previously established confidentiality determinations for these data elements 

continue to apply. The proposed new inputs to emission equations are discussed in another 

memorandum titled “Review of Potential Disclosure Concerns for Proposed New Inputs to 

Emission Equations in the Proposed Rulemaking ‘Revisions and Confidentiality Determinations 

for Petroleum and Natural Gas Systems.” 

A copy of the Subpart W 2014 Amendments can be found on EPA’s website at 

http://www.epa.gov/ghgreporting/reporters/rules/index.html. Copies of the proposed and final 

CBI rules identified in this memorandum are available on EPA’s website: 

http://www.epa.gov/ghgreporting/reporters/cbi/index.html, at the following links: 

http://www.gpo.gov/fdsys/pkg/FR-2010-07-07/pdf/2010-16317.pdf and 

http://www.gpo.gov/fdsys/pkg/FR-2011-05-26/pdf/2011-12930.pdf. 
3 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

Natural Gas Pneumatic Device Venting §98.236(b) For each industry segment, whether the facility has any continuous highbleed, intermittent bleed, or continuous low-bleed natural gas pneumatic 

devices subject to reporting. 

Facility and Unit Identifier Information 

§98.236(b)(1)(ii)(C) Whether the reporting year is first or second year of reporting. Calculation Method Natural Gas Pneumatic Pump Venting §98.236(c) Whether the facility has any natural gas driven pneumatic pumps. Facility and Unit Identifier 

Information 

Acid Gas Removal §98.236(d) Whether the facility has any acid gas removal units vented to the 

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

Facility and Unit Identifier Information 

§98.236(d)(1)(vi) Sub-basin ID (onshore petroleum and natural gas production only). Facility and Unit Identifier 

Information 

§98.236(d)(2)(i)(B) If you used Calculation Method 1 or 2 in §98.233(d), the total annual 

volume of vent gas exiting the acid gas removal unit (cfy). 

Emissions 

§98.236(d)(2)(ii)(A) If you used Calculation Method 3 in §98.233(d), whether Equation W-4A 

or W-4B was used. 

Calculation Method 

§98.236(d)(2)(iii)(A) For each unit for which Calculation Method 4 in §98.233(d) is used, the 

name of the simulation software package used. 

Calculation Method 

1 The categorical confidentiality determinations for the data categories listed in this table were finalized on May 26, 2011 (see 76 FR 30782).
4 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

Dehydrators §98.236(e) For the onshore petroleum and natural gas production or onshore natural 

gas processing industry segments, for each industry segment, whether the facility has any: absorbent dehydrators that have an annual average daily natural gas throughput > or = to 0.4 MMscfd, glycol dehydrators that have an annual average daily natural gas throughput > or = to 0.4 MMscfd, and desiccant dehydrators. 

Facility and Unit Identifier Information 

§98.236(e)(1)(xviii) For each absorbent dehydrator, sub-basin ID (for the onshore petroleum 

and natural gas production industry segment only). 

Facility and Unit Identifier Information 

Well Venting for Liquids Unloading §98.236(f) Indicate which calculation methods (as specified in §98.233(f)) were used. Calculation Method §98.236(f)(1)(i) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (reported separately for wells with plunger lifts and wells without plunger lifts), the Sub-basin ID. 

Facility and Unit Identifier Information 

§98.236(f)(1)(ii) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (reported separately for wells with plunger lifts and wells without plunger lifts), a well tubing diameter and pressure group ID. 

Facility and Unit Identifier Information 

§98.236(f)(1)(v) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (reported separately for wells with plunger lifts and wells without plunger lifts), the percentage of wells for which the monitoring period used to determine the cumulative venting time was not the full calendar year. 

Calculation Method 
5 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(f)(1)(viii) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (reported separately for wells with plunger lifts and wells without plunger lifts), total annual natural gas emissions (scf/yr). 

Emissions 

§98.236(f)(1)(xii)(A) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (for wells without plunger lifts), the API number of tested well. 

Facility and Unit Identifier Information 

§98.236(f)(1)(xi)(A) For each Sub-basin and well tubing diameter and pressure group for which 

you used Calculation Method 1 (for wells without plunger lifts), the API number of tested well. 

Facility and Unit Identifier Information 

§98.236(f)(2)(i) For each Sub-basin for which you used Calculation Method 2 or 3, the Subbasin ID. Facility and Unit Identifier Information §98.236(f)(2)(ii) For each Sub-basin for which you used Calculation Method 2 or 3, the 

calculation method. 

Calculation Method 

§98.236(f)(2)(vi) For each Sub-basin for which you used Calculation Method 2 or 3, total 

annual natural gas emissions (scf/yr) from well venting for liquids unloading, as calculated according to §98.233(f)(2) or §98.233(f)(3), as applicable. 

Emissions 

Completions and Workovers with Hydraulic Fracturing §98.236(g)(1) For each completion or workover and well type combination, the Sub-basin 

ID. 

Facility and Unit Identifier Information 

§98.236(g)(2) For each completion or workover and well type combination, the well type 

combination. 

Facility and Unit Identifier Information 

§98.236(g)(4) Calculation method. Calculation Method 
6 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(g)(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 vented natural gas volume, in standard cubic feet, for each well in the sub-basin (“FVs,p” in Equation W-10B). 

Emissions 

§98.236(g)(7) For each completion or workover and well type combination, annual gas 

emissions, in standard cubic feet (“Es,n” in Equation W-10A or W-10B). 

Emissions 

Completions and Workovers without Hydraulic Fracturing §98.236(h)(1)(i) For each sub-basin with completions without hydraulic fracturing and 

without flaring, the Sub-basin ID. 

Facility and Unit Identifier Information 

§98.236(h)(2)(i) For each sub-basin with completions without hydraulic fracturing and with 

flaring, the Sub-basin ID. 

Facility and Unit Identifier Information 

§98.236(h)(3)(i) For each sub-basin with workovers without flaring, the Sub-basin ID. Facility and Unit Identifier 

Information 

§98.436(h)(4)(i) For each sub-basin with workovers without hydraulic fracturing and with 

flaring, the Sub-basin ID. 

Facility and Unit Identifier Information 

Blowdown Vent Stacks §98.236(i) You must indicate whether your facility has blowdown vent stacks. Facility and Unit Identifier 

Information 

§98.236(i) You must indicate whether emissions are calculated by equipment type or 

with flow meters. 

Calculation Method 

§98.236(i)(1) If reporting by equipment type, the applicable type. Facility and Unit Identifier 

Information 

§98.236(i)(1)(ii) If reporting by equipment type, total CO2 emissions for each equipment 

type (mt CO2/yr). 

Emissions 
7 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(i)(1)(iii) If reporting by equipment type, total CH4 emissions for each equipment 

type (mt CH4/yr). 

Emissions 

§98.236(i)(2)(i) If emissions are determined using a flow meter, total CO2 emissions (mt 

CO2/yr). 

Emissions 

§98.236(i)(2)(ii) If emissions are determined using a flow meter, total CH4 emissions (mt 

CH4/yr). 

Emissions 

Onshore Production Storage Tanks §98.236(j) Whether your onshore petroleum and natural gas production facility send 

produced oil to atmospheric tanks. 

Facility and Unit Identifier Information 

§98.236(j)(1)(i) For each sub-basin where Calculation Method 1 or 2 is used, the Sub-basin 

ID. 

Facility and Unit Identifier Information 

§98.236(j)(1)(ii) Calculation method used, and name of the software package used if using 

Calculation Method 1. 

Calculation Method 

§98.236(j)(2)(ii)(A) For each sub-basin where Calculation Method 3 is used, the Sub-basin ID. Facility and Unit Identifier 

Information 

§98.236(j)(2)(iii)(A) For each sub-basin with atmospheric tanks using Calculation Method 3 that 

control emissions with flares, the Sub-basin ID. 

Facility and Unit Identifier Information 

Transmission Storage Tanks §98.236(k) Whether the facility contains any transmission storage tanks. Facility and Unit Identifier 

Information 

§98.236(k)(1)(ii) For each transmission storage tank vent stack, the method used to 

determine if dump valve leakage is occurring. 

Test and Calibration Meth

§98.236(k)(2)(i) For each transmission storage tank vent stack where leakage is occurring 

and the vent stack is vented directly to the atmosphere, the method used to measure the leakage rate. 

Test and Calibration Meth
8 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(k)(3)(i) For each transmission storage tank vent stack where leakage is occurring 

and the vent stack vents to a flare, the method used to measure the leakage rate. 

Test and Calibration Meth

Well Testing Venting and Flaring §98.236(l) Whether you performed gas well or oil well testing that resulted in venting 

or flaring during the reporting year. 

Facility and Unit Identifier Information 

Associated Natural Gas Venting and Flaring §98.236(m)(1) For each Sub-basin, the Sub-basin ID. Facility and Unit Identifier 

Information 

§98.236(m)(7) Total volume of emissions reported elsewhere, in standard cubic feet, 

during time periods in which associated gas was vented or flared and which are calculated and reported under other paragraphs of this section, in standard cubic feet (sum of “EREp,q” values used in Equation W-18 of this subpart). 

Emissions 

Associated Natural Gas Venting and Flaring §98.236(n) You must indicate if your facility contains any flare stacks. Facility and Unit Identifier 

Information 

Centrifugal Compressors §98.236(o) You must indicate whether your facility has centrifugal compressors. Facility and Unit Identifier 

Information 

§98.236(o)(1)(i) For each compressor at your facility, a unique name or ID for the 

centrifugal compressor. 

Facility and Unit Identifier Information 

§98.236(o)(1)(iv) Indicator whether the compressor was measured in operating mode. Test and Calibration Meth§98.236(o)(1)(v) Indicate whether the compressor was measured in not-operatingdepressurized mode. Test and Calibration Meth
9 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.326(o)(2)(iv) Emission vent type. Indicate whether the emission vent is for a single 

compressor source or manifolded group of compressor sources and whether the emissions from the emission vent are released to the atmosphere, routed to a flare, combustion (fuel or thermal oxidizer), or vapor recovery. 

Calculation Method 

§98.326(o)(2)(v) Indicate whether as found leak measurement as identified in §98.233(o)(2) 

or (o)(4) was performed on the vent. 

Test and Calibration Meth

§98.326(o)(2)(vi) Indicate whether continuous leak measurement as identified in 

§98.233(o)(3) or (o)(5) was performed on the vent. 

Test and Calibration Meth

§98.236(o)(3)(i)(A) If the measurement methods specified in paragraphs §98.233(o)(2) or (o)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the name or ID of vent. 

Facility and Unit Identifier Information 

§98.236(o)(3)(i)(B) If the measurement methods specified in paragraphs §98.233(o)(2) or (o)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the sample date. 

Test and Calibration Meth

§98.236(o)(3)(i)(C) If the measurement methods specified in paragraphs §98.233(o)(2) or (o)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the leak measurement method. 

Test and Calibration Meth

§98.236(o)(3)(i)(E) If the measurement methods specified in paragraphs §98.233(o)(2) or (o)(4) 

are performed: For each as found leak measurement performed on an emission vent, for each compressor attached to the emission vent, report the mode of operation the compressor was in when the sample was taken. 

Test and Calibration Meth

§98.236(o)(3)(ii)(A) For each compressor mode-source combination where a reporter emission 

factor as calculated in Equation W-24 was used to calculate emissions in Equation W-23, report the compressor mode-source combination. 

Facility and Unit Identifier Information 

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

emission factor is facility-specific or corporate. 

Calculation Method 
10 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(o)(4)(i) Continuous leak measurement data. If the measurement methods specified 

in paragraphs §98.233(o)(3) or (o)(5) are performed, report the name or ID of vent. 

Facility and Unit Identifier Information 

Reciprocating Compressors §98.236(p) You must indicate whether your facility has reciprocating compressors. Facility and Unit Identifier 

Information 

§98.236(p)(1)(i) For non-manifolded compressors, a compressor ID. Facility and Unit Identifier 

Information 

§98.236(p)(1)(v) Indicator whether the compressor was measured in operating mode. Test and Calibration Meth§98.236(p)(1)(vi) Indicator whether the compressor was measured in standby-depressurized 

mode. 

Test and Calibration Meth

§98.236(p)(1)(vii) Indicator whether the compressor was measured in not-operatingdepressurized mode. Test and Calibration Meth§98.236(p)(2)(i) Reciprocating compressor name or ID. Facility and Unit Identifier 

Information 

§98.236(p)(2)(ii) Reciprocating compressor source degassing, isolation valve, blowdown 

valve, or rod packing). 

Facility and Unit Identifier Information 

§98.236(p)(2)(iii) Unique name or ID for the emission vent. Facility and Unit Identifier 

Information 

§98.236(p)(2)(iv) Vent type. Indicate whether the vent is for a single compressor source 

venting to atmosphere, a manifolded group of compressor sources venting to atmosphere, a vent routed to a flare, a vent routed to combustion (fuel or thermal oxidizer), or a vent routed to vapor recovery. 

Calculation Method 

§98.236(p)(2)(v) Indicate whether as found leak measurement as identified in §98.233(p)(2) 

or (p)(4) was performed on the vent. 

Test and Calibration Meth
11 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

98.236(p)(2)(vi) Indicate whether continuous leak measurement as identified in 

§98.233(p)(3) or (p)(5) was performed on the vent. 

Test and Calibration Meth

§98.236(p)(3)(i)(A) If the measurement methods specified in paragraphs §98.233(p)(2) or (p)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the name or ID of emission vent. 

Facility and Unit Identifier Information 

§98.236(p)(3)(i)(B) If the measurement methods specified in paragraphs §98.233(p)(2) or (p)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the sample date. 

Test and Calibration Meth

§98.236(p)(3)(i)(C) If the measurement methods specified in paragraphs §98.233(p)(2) or (p)(4) 

are performed: For each as found leak measurement performed on an emission vent, report the leak measurement method. 

Test and Calibration Meth

§98.236(p)(3)(i)(E) If the measurement methods specified in paragraphs §98.233(p)(2) or (p)(4) 

are performed: For each as found leak measurement performed on an emission vent, for each compressor attached to the emission vent, report the mode of operation the compressor was in when the sample was taken. 

Test and Calibration Meth

§98.236(p)(3)(ii)(A) 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 compressor mode-source combination. 

Facility and Unit Identifier Information 

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

emission factor is facility-specific or corporate. 

Calculation Method 

§98.236(p)(4)(i) If the measurement methods specified in paragraphs §98.233(p)(3) or (p)(5) 

are performed, report the name or ID of vent. 

Facility and Unit Identifier Information 

Leak detection and leaker emission factors §98.236(q)(1)(i) You must report the number of complete leak surveys performed during the 

calendar year. 

Test and Calibration Meth
12 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

§98.236(q)(1)(ii) For natural gas distribution facilities performing a multiple year leak survey 

cycle, the number of years in the leak survey cycle must be reported. 

Test and Calibration Meth

§98.236(q)(2)(i) Component type. Facility and Unit Identifier 

Information 

Equipment Leaks by Population Counts §98.236(r)(1) You must indicate whether your facility contains any of the emission 

source types covered by §98.233(r), for the applicable industry segment. 

Facility and Unit Identifier Information 

§98.236(r)(1)(i) Emission source type. Facility and Unit Identifier 

Information 

§98.236(r)(3)(i) Onshore petroleum and natural gas production facilities must report the 

information specified in paragraph (r)(3) of this section.(i) Calculation method used. 

Calculation Method 

§98.236(r)(3)(ii)(A) An indication of whether the facility contains the major equipment type. Facility and Unit Identifier 

Information 

EOR Injection Pump Blowdown §98.236(w)(1) For each EOR injection pump system, the Sub-basin ID. Facility and Unit Identifier 

Information 

§98.236(w)(2) For each EOR injection pump system, an identifier. Facility and Unit Identifier 

Information 

EOR Hydrocarbon Liquid Dissolved CO2§98.236(x)(1) For each sub-basin with EOR operations, the Sub-basin ID. Facility and Unit Identifier 

Information 
13 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

Onshore Petroleum and Natural Gas Production and Natural Gas Distribution §98.236(z) For each facility, whether the facility has any combustion units subject to 

reporting. 

Facility and Unit Identifier Information 

§98.236(z)(1) Indicate whether the combustion units subject to reporting under §98.232 

include external fuel combustion units with a rated heat less than or equal to 5 mmBtu/hr, or internal fuel combustion units, excluding compressordrivers, with a rated heat capacity less than or equal to 1 mmBtu/hr (or the equivalent of 130 horsepower). 

Facility and Unit Identifier Information 

§98.236(z)(1)(i) The type of combustion unit. Facility and Unit Identifier 

Information 

§98.236(z)(2) Indicate whether the combustion units subject to reporting under §98.232 

include external fuel combustion units with a rated heat greater than 5 mmBtu/hr, internal fuel combustion units, excluding compressor-drivers, with a rated heat capacity less than or equal to 1 mmBtu/hr (or the equivalent of 130 horsepower), or compressor-drivers. 

Facility and Unit Identifier Information 

§98.236(z)(2)(i) The type of combustion unit. Facility and Unit Identifier 

Information 

Onshore Petroleum and Natural Gas Production §98.236(aa)(1)(ii)(A) For each sub-basin category, the state. Facility and Unit Identifier 

Information 

§98.236(aa)(1)(ii)(B) For each sub-basin category, the county. Facility and Unit Identifier 

Information 
14 

Table A-1. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Da

Categories with Categorical Determinations1

Rule Citation Proposed Data Element 

Proposed Category 

Assignment 

Missing Data Provisions §98.236(bb)(1)(i) The date(s) the missing data are used. Missing Data Provisions §98.236(bb)(1)(ii) The equation(s) in which the missing data are used Missing Data Provisions §98.236(bb)(1)(iii) The description of the unique or unusual circumstance that led to missing 

data use, including information on any equipment or components involved and any procedures that were not followed. 

Missing Data Provisions 

§98.236(bb)(i)(iv) The description of the procedures used to substitute an unavailable value of 

a parameter. 

Missing Data Provisions 

§98.236(bb)(i)(v) The description of how the owner or operator will avoid the use of missing 

data in the future, such as mitigation strategies or changes to standard operating procedures. 

Missing Data Provisions 
15 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

Acid Gas Removal §98.236(d)(1)(iv) Whether and CO2 emissions are recovered and transferred 

outside the facility 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Dehydrators §98.236(e)(1)(xvii) For each absorbent dehydrator, whether any dehydrator 

emissions are vented to the atmosphere without being routed to a flare or regenerator firebox. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(2)(i) For glycol dehydrators with an annual average daily natural 

gas throughput less than 0.4 MMscfd, the total number of dehydrators at the facility. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(2)(ii) For glycol dehydrators with an annual average daily natural 

gas throughput less than 0.4 MMscfd, the total number of dehydrators venting to a vapor recovery device. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(2)(iii) For glycol dehydrators with an annual average daily natural 

gas throughput less than 0.4 MMscfd, the number of dehydrators venting to a control device other than a vapor recovery device or a flare or regenerator firebox/fire tubes. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(2)(iv) For glycol dehydrators with an annual average daily natural 

gas throughput less than 0.4 MMscfd, whether any glycol dehydrator emissions are vented to a flare or regenerator firebox/fire tubes. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(2)(iv)(A) For glycol dehydrators with an annual average daily natural 

gas throughput less than 0.4 MMscfd and vent to a flare or regenerator firebox, the total number of dehydrators. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, the total number of 

dehydrators at the facility. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
16 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

§98.236(e)(3)(i) For dehydrators that use desiccant, whether any dehydrator 

emissions are vented to a vapor recovery device. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, the total number of 

dehydrators venting to a vapor recovery device. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, whether any dehydrator 

emissions are vented to a control device other than a vapor recovery device or a flare or regenerator firebox/fire tubes, and the control device type. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, whether any dehydrator 

emissions are vented to a control device other than a vapor recovery device or a flare or regenerator firebox/fire tubes. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, the number of 

dehydrators venting to a control device other than a vapor recovery device or a flare or regenerator firebox/fire tubes. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant, whether any glycol 

dehydrator emissions are vented to a flare or regenerator firebox/fire tubes. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(e)(3)(i) For dehydrators that use desiccant and vent to a flare or 

regenerator firebox, the total number of dehydrators. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Well Venting for Liquids Unloading §98.236(f) Liquids unloading. You must indicate whether well venting 

for liquids unloading occurs at your facility. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(f)(1)(iv) For each Sub-basin and well tubing diameter and pressure 

group for which you used Calculation Method 1 (reported separately for wells with plunger lifts and wells without plunger lifts), the count of wells vented to the atmosphere for this grouping. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
17 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

Completions and Workovers with Hydraulic Fracturing §98.236(g) Whether the facility had any gas well completions or 

workovers with hydraulic fracturing in the calendar year. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(g)(3) For each completion or workover and well type 

combination, the total number of completions or workovers.

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Completions and Workovers without Hydraulic Fracturing §98.236(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. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(h)(1)(ii) For each sub-basin with gas well completions without 

hydraulic fracturing and without flaring, the number of completions that vented gas to the atmosphere. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

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

without hydraulic fracturing in the sub-basin without flaring, in standard cubic feet per hour (average of all “Vp” as used in Equation W-13B). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(h)(2)(ii) For each sub-basin with gas well completions without 

hydraulic fracturing and with flaring, the number of well completions that flared gas. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

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

backflow for all completions in the sub-basin category (sum of all “Tp” for completions that vented to a flare as used in Equation W-13B). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
18 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

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

without hydraulic fracturing in the sub-basin with flaring, in standard cubic feet per hour (average of all “Vp” from Equation W-13B). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Blowdown Vent Stacks §98.236(i)(1)(i) Total number of blowdowns in the calendar year for the 

equipment type (sum equation variable “N” from Equation W-14A or Equation W-14B of this subpart for all unique physical volumes for the equipment type). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Onshore Production Storage Tanks §98.236(j) You must indicate whether your facility sends produced oil 

to atmospheric tanks. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(j) If any of the atmospheric tanks are observed to have 

malfunctioning dump valves, indicate that dump valves were malfunctioning. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(j)(3)(ii) If any of the gas-liquid separator liquid dump valves did not 

close properly during the reporting year, the total time, in hours, the dump valves on gas-liquid separators did not close properly (“Tn” in equation W-16). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Transmission Storage Tanks §98.236(k)(1)(iii) For each transmission storage tank vent stack, indicate 

whether scrubber dump valve leakage is occurring for the transmission storage vent. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(k)(1)(iv) For each transmission storage tank vent stack, indicate if 

there is a flare attached to the vent stack. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
19 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

Well Testing Venting and Flaring §98.236(l)(1)(iv) If oil well testing is performed where emissions are not 

vented to a flare, the average flow rate in barrels of oil per day for well(s) tested. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(l)(2)(iv) If oil well testing is performed where emissions are vented 

to a flare, the average flow rate in barrels of oil per day for well(s) tested. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(l)(3)(iii) If gas well testing is performed where emissions are not 

vented to a flare, the average annual production rate in actual cubic feet per day for well(s) tested. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(l)(4)(iii) If gas well testing is performed where emissions are vented 

to a flare, the average annual production rate in actual cubic feet per day for well(s) tested. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Associated Natural Gas Venting and Flaring §98.236(m) You must indicate whether any associated gas was vented 

or flared during the reporting year. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(m)(2) For each sub-basin, indicate whether any associated gas 

was vented without flaring. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(m)(3) For each sub-basin, indicate whether any associated gas 

was flared. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(m)(5) For each sub-basin, the volume of oil produced during time 

periods in which associated gas was vented or flared (barrels). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(m)(6) For each sub-basin, the total volume of associated gas sent 

to sales during time periods in which associated gas was vented or flared (scf). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
20 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

Centrifugal Compressors §98.236(o)(1)(iv) operating mode (v) not operating mode 

For non-manifolded compressors, whether the compressor was measured in the operating-mode or the not-operatingdepressurized–mode. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(o)(1)(vii) Indicate whether any compressor sources are routed to a 

flare. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(o)(1)(viii) Indicate whether any compressor sources have vapor 

recovery. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(o)(1)(ix) Indicate whether emissions from any compressor sources 

are captured for fuel use or are routed to a thermal oxidizer. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(o)(1)(x) Indicate whether the compressor has blind flanges installed. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(o)(1)(xi) Indicate whether the compressor has wet or dry seals. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(o)(1)(xiii) Compressor power rating (hp). Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(o)(1)(xiv) Year compressor was installed. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(o)(1)(xv) Compressor model name and description. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(o)(1)(xvi) Date of last maintenance shutdown that the compressor was 

depressurized. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(o)(2)(viii) If the emission vent is routed to flare, combustion, or vapor 

recovery, report the percentage of time that the respective device was operational. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
21 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

Reciprocating Compressors §98.236(p)(1)(viii) Indicate whether any compressor sources are part of a 

manifolded group of compressor sources. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(p)(1)(ix) Indicate whether any compressor sources are routed to a 

flare. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(p)(1)(x) Indicate whether any compressor sources have vapor 

recovery. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(p)(1)(xi) Indicate whether emissions from any compressor sources 

are captured for fuel use or are routed to a thermal oxidizer. 

Unit/Process Static Characteristics that are NInputs to Emission Equations 

§98.236(p)(1)(xii) Indicate whether the compressor has blind flanges installed. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(p)(1)(xiii) Compressor power rating (hp). Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(p)(1)(xiv) Year compressor was installed. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(p)(1)(xv) Compressor model name and description. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(p)(1)(xvi) Date of last maintenance shutdown for rod packing 

replacement. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(p)(2)(viii) If the emission vent is routed to flare, combustion, or vapor 

recovery, report the percentage of time that the respective device was operational. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Leak detection and leaker emission factors §98.236(q)(2)(iii) Average time surveyed components were found leaking and 

operational, in hours (average of Tp,z in Equation W-30 of this subpart). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 
22 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

§98.236(q)(3)(ii) Number of meter/regulator runs at above grade 

transmission-distribution transfer stations surveyed in the calendar year. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(q)(3)(iii) Average time that meter/regulator runs surveyed in the 

calendar year were operational, in hours (average of Tw,y in Equation W-31 of this subpart, for the current calendar year). 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(q)(3)(v) Number of meter/regulator runs at above grade 

transmission-distribution transfer stations surveyed in current leak survey cycle. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

§98.236(q)(3)(vi) Average time that meter/regulator runs surveyed in the 

current leak survey cycle were operational, in hours. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

EOR Injection Pump Blowdown §98.236(w) Whether CO2 EOR injection was used at the facility. Unit/Process Operating Characteristics that 

Not Inputs to Emission Equations 

§98.236(w) You must indicate whether any EOR injection pump 

blowdowns occurred during the year. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

EOR Hydrocarbon Liquid Dissolved CO2§98.236(x) Whether hydrocarbon liquids were produced through EOR 

operations. 

Unit/Process Operating Characteristics that Not Inputs to Emission Equations 

Onshore Petroleum and Natural Gas Production and Natural Gas Distribution §98.236(z)(1)(ii) The total number of combustion units. Unit/Process Static Characteristics that are N

Inputs to Emission Equations 

§98.236(z)(2)(ii) The type of fuel combusted. Unit/Process Operating Characteristics that 

Not Inputs to Emission Equations 
23 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

§98.236(z)(2)(i) The type of combustion unit. Unit/Process Static Characteristics that are 

Inputs to Emission Equations 

Onshore petroleum and natural gas production §98.236(aa)(1)(ii)(C) For each sub-basin category, the formation type. Unit/Process Static Characteristics that are 

Inputs to Emission Equations 

§98.236(aa)(1)(ii)(D) For each sub-basin category, the number of producing wells 

at the end of the calendar year. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

§98.236(aa)(1)(ii)(E) For each sub-basin category, the number of producing wells 

acquired during the calendar year. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

§98.236(aa)(1)(ii)(F) For each sub-basin category, the number of producing wells 

divested during the calendar year. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

§98.236(aa)(1)(ii)(G) For each sub-basin category, the number of wells 

completed during the calendar year. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

§98.236(aa)(1)(ii)(H) For each sub-basin category, the number of wells taken out 

of production during the calendar year. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

§98.236(aa)(1)(ii)(I) For each sub-basin category, the average mole fraction CH4

in produced gas. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(1)(ii)(J) For each sub-basin category, the average mole fraction CO2

in produced gas. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

Onshore natural gas processing §98.236(aa)(3)(vii) Whether the facility fractionates NGLs. Unit/Process Static Characteristics that are 

Inputs to Emission Equations 

Natural gas transmission compression §98.236(aa)(4)(i) The quantity of gas transported through the compressor 

station in the calendar year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 
24 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

§98.236(aa)(4)(ii) Number of compressors. Unit/Process Static Characteristics that are 

Inputs to Emission Equations 

§98.236(aa)(4)(iii) The total compressor power rating for all compressors 

combined, in horsepower. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(4)(iv) The average upstream pipeline pressure in pounds per 

square inch gauge. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(4)(v) The average downstream pipeline pressure in pounds per 

square inch gauge. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

Underground natural gas storage §98.236(aa)(5)(i) The quantity of gas injected into storage in the calendar 

year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(5)(ii) The quantity of gas withdrawn from storage in the calendar 

year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(5)(iii) The total storage capacity in thousand standard cubic feet. Unit/Process Static Characteristics that are 

Inputs to Emission Equations 

LNG import and export equipment §98.236(aa)(6) For LNG import equipment, the quantity of LNG imported 

in the calendar year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(7) For LNG export equipment, the quantity of LNG exported 

in the calendar year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

LNG storage §98.236(aa)(8)(i) The quantity of LNG added into storage in the calendar 

year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(8)(ii) The quantity of LNG withdrawn from storage in the 

calendar year, in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 
25 

Table A-2. 

Proposed Data Category Assignments and Confidentiality Determinations for New/Substantially Revised Data 

Unit/Process Operating Characteristics and the Unit/Process Static Characteristics Data Cat

Rule Citation Proposed Data Element Proposed Category Assignment 

§98.236(aa)(8)(iii) The total LNG storage capacity in the calendar year, in 

thousand standard cubic feet. 

Unit/Process Static Characteristics that are Inputs to Emission Equations 

Natural gas distribution §98.236(aa)(9)(i) The quantity of natural gas received at all custody transfer 

stations and withdrawn from in-system storage. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(ii) The quantity of natural gas withdrawn from in-system 

storage in the reporting year in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(iii) The quantity of natural gas added to in-system storage in 

the reporting year in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(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. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(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. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(vi) The quantity of natural gas consumed by the LDC for 

operational purposes in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 

§98.236(aa)(9)(vii) The estimated quantity of gas stolen in the reporting year 

in thousand standard cubic feet. 

Unit/ Process Operating Characteristics ThaNot Inputs to Emission Equations 
26 

Table A-3. 

Proposed Confidentiality Determinations for New/Substantially Revised Data Elements Not Assigned to a Data 

Confidentiality Determinations for three Existing Data Elements

Rule Citation Proposed Data Element 

Onshore petroleum and natural gas production §98.236(j)(2)(i)(A) The total annual oil throughput that is sent to atmospheric tanks in the basin, in barrels. §98.236(aa)(1)(i)(A) The quantity of gas produced in the calendar year from wells, in thousand standard cubic feet. This includ

gas that is routed to a pipeline, vented or flared, or used in field operations. This does not include gas injecback into reservoirs or shrinkage resulting from lease condensate production. 

§98.236(aa)(1)(i)(B) The quantity of gas produced in the calendar year for sales in thousand standard cubic feet. §98.236(aa)(1)(i)(C) For each basin, the quantity of crude oil produced in the calendar year for sales, not including lease 

condensates, in barrels. 

§98.236(aa)(1)(i)(D) For each basin, the quantity of lease condensate produced in the calendar year for sales (in barrels). Offshore petroleum and natural gas production §98.236(aa)(2)(i) The quantity of gas produced for sales from the offshore platform in the calendar year for sales, in thousan

standard cubic feet. 

§98.236(aa)(2)(ii) The quantity of oil produced for sales from the offshore platform in the calendar year for sales (in barrels)§98.236(aa)(2)(iii) The quantity of condensate produced for sales from the offshore platform in the calendar year for sales (in 

barrels). 

Onshore natural gas processing §98.236(aa)(3)(i) The quantity of produced gas received at the gas processing plant in thousand standard cubic feet. §98.236(aa)(3)(ii) The quantity of processed (residue) gas leaving the gas processing plant in thousand standard cubic feet. §98.236(aa)(3)(iii) The quantity of NGLs (bulk and fractionated) received at the gas processing plant in the calendar year, in 

barrels. 

§98.236(aa)(3)(iv) The quantity of NGLs (bulk and fractionated) leaving the gas processing plant in the calendar year, in barr