# MEMORANDUM

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

From: Alexis McKittrick and Mark DeFigueiredo, EPA/CCD

Date: February 20, 2014

Subject: Revisions to the Subpart W Reporting Requirements as proposed in the “Greenhouse

Gas Reporting Rule: Revisions and Confid entiality Determinations for Petroleum

and Natural Gas Systems; Proposed Rule”

In the notice entitled “Greenhouse Gas Repor ting Rule: Revisions and Confidentiality

Determinations for Petroleum and Natural Gas Systems; Proposed Rule,” the EPA is proposing

changes to the reporting requirements in the Greenhouse Gas Reporting Program for Petroleum

and Natural Gas Systems (subpart W). The pr oposed changes amend monitoring and data

reporting requirements, revise cal culation methods, clarify certai n terms and definitions, and

correct technical and editorial errors. Specifi cally, the reporting re quirements section of

subpart W has been re-written to revise the re ported 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 proposed changes to the subpart W reporting requirements, including

the proposed and current rule text, and an identi fication of whether the data element is new,

revised, or a current reporting re quirement. Data elements that ar e listed as “Current” are those

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

existing data element. Data elements listed as “R evised” are those with substantial revisions to

existing reporting requirements.2Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementNatural Gas Pneumatic Device Venting§98.236(b)You must indicate whether the facility contains thefollowing types of equipment: continuous high bleednatural gas pneumatic devices, continuous low bleednatural gas pneumatic devices, and intermittent bleednatural gas pneumatic devices. If the facility containsany continuous high bleed natural gas pneumaticdevices, continuous low bleed natural gas pneumaticdevices, or intermittent bleed natural gas pneumaticdevices, you must report the information specified inparagraphs (b)(1) through (b)(4) of this section for eachdevice type.New§98.236(b)(1)(i)§98.236(c)(1)(i),(ii), (iii)(1) The number of natural gas pneumatic devices asspecified in paragraphs (b)(1)(i) and (b)(1)(ii) of thissection.(i) The total number of devices, determined accordingto §98.233(a)(1) and (a)(2).(i) Actual count and estimatedcount separately of natural gaspneumatic high bleed devicesas applicable.(ii) Actual count and estimatedcount separately of natural gaspneumatic low bleed devices asapplicable.(iii) Actual count and estimatedcount separately of natural gaspneumatic intermittent bleeddevices as applicable.Current3Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 thissection is an estimated value determined according to§98.233(a)(2), then you must report the informationspecified in paragraphs (b)(1)(ii)(A) through(b)(1)(ii)(C) of this section.(A) The number of devices reported in paragraph(b)(1)(i) of this section that are counted.(i) Actual count and estimatedcount separately of natural gaspneumatic high bleed devicesas applicable.(ii) Actual count and estimatedcount separately of natural gaspneumatic low bleed devices asapplicable.(iii) Actual count and estimatedcount separately of natural gaspneumatic intermittent bleeddevices 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 estimatedcount separately of natural gaspneumatic high bleed devicesas applicable.(ii) Actual count and estimatedcount separately of natural gaspneumatic low bleed devices asapplicable.(iii) Actual count and estimatedcount separately of natural gaspneumatic intermittent bleeddevices as applicable.Current§98.236(b)(1)(ii)(C)(C) Whether the calendar yearis the first calendar yearof reporting or the second calendar year of reporting.New§98.236(b)(2)(2) Estimated average number of hours in the calendaryear that the natural gas pneumatic devices reported inparagraph (b)(1)(i) of this section were operating in thecalendar year (“Tt” in Equation W-1 of this subpart).New4Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(b)(3)§98.236(c )(1)(iv)(3) Annual CO2emissions, in metric tons CO2, for thenatural gas pneumatic devices combined, calculatedusing Equation W-1 of this subpart and §98.233(a)(4),and reported in paragraph (b)(1)(i) of this section.Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for each of thefollowing pieces of equipment:high bleed pneumatic devices;intermittent bleed pneumaticdevices; low bleed pneumaticdevices.Current§98.236(b)(4)§98.236(c)(1)(iv)(4) Annual CH4emissions, in metric tons CH4, for thenatural gas pneumatic devices combined, calculatedusing Equation W-1 of this subpart and §98.233(a)(4),and reported in paragraph (b)(1)(i) of this section.Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for each of thefollowing pieces of equipment:high bleed pneumatic devices;intermittent bleed pneumaticdevices; low bleed pneumaticdevices.CurrentNatural Gas Pneumatic Pump Venting§98.236(c)You must indicate whether the facility has any naturalgas driven pneumatic pumps. If the facility containsany natural gas driven pneumatic pumps, then youmust 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 drivenpneumatic pumps.Current§98.236(c)(2)(2) Average estimated numberof hours in the calendaryear the pumps were operational (“T” in Equation W-2of this subpart).New5Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(c)(3)§98.236(c)(2)(ii)(3) Annual CO2emissions, in metric tons CO2, for allnatural gas driven pneumatic pumps combined,calculated according to §98.233(c)(1) and (c)(2).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all natural gasdriven pneumatic pumpscombined.Current§98.236(c)(4)§98.236(c)(2)(ii)(4) Annual CH4emissions, in metric tons CH4, for allnatural gas driven pneumatic pumps combined,calculated according to §98.233(c)(1) and (c)(2).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all natural gasdriven pneumatic pumpscombined.CurrentAcid Gas Removal§98.236(d)You must indicate whether your facility has any acidgas removal units that vent directly to the atmosphere,to a flare or engine, or toa sulfur recovery plant. Ifyour facility contains any acid gas removal units thatvent directly to the atmosphere, to a flare or engine, orto a sulfur recovery plant, then you must report theinformation specified in paragraphs (d)(1) and (d)(2) ofthis section.New§98.236(d)(1)(i)§98.236(c)(3)(vi)(1) You must report the information specified inparagraphs (d)(1)(i) through (d)(1)(v) of this section foreach acid gas removal unit.(i) A unique name or ID number for the acid gasremoval unit. For the onshore petroleum and naturalgas production industry segment, a different name orID may be used for a single acid gas removal unit foreach location it operates at in a given year.For the onshore natural gasprocessing industry segmentonly, report a unique name orID number for the AGR unit.Current6Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(d)(1)(ii) §98.236(c)(3)(i)Total feed rate entering the acid gas removal unit,using a meter or engineering estimate based on processknowledge or best available data, in million cubic feetper year.Total throughput off the acidgas removal unit using a meteror engineering estimate basedon process knowledge or bestavailable data in million cubicfeet per year.Revised§98.236(d)(1)(iii)§98.236(c)(3)(vii)The calculation method used to calculate CO2emissions from the acid gas removal unit, as specifiedin §98.233(d).An indication of whichcalculation methodology wasused for the AGR.Current§98.236(d)(1)(iv)Whether any CO2emissions from the acid gas removalunit 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)If any CO2emissions from the acid gas removal unitwere recovered and transferred outside the facility,then you must report the annual quantity of CO2, inmetric tons CO2that was recovered and transferredoutside the facility.Report the annual quantity ofCO2, expressed in metric tonsCO2e, that was recovered fromthe AGR unit and transferredoutside the facility, undersubpart PP of this part.Current§98.236(d)(1)(v)§98.236(c)(3)(v)Annual CO2emissions, in metric tons CO2, from theacid gas removal unit, calculated using any one of thecalculation methods specified in § §98.233(d) and asspecified in § §98.233(d)(10) and (11).Report annual CO2emissionsfor the AGR unit, expressed inmetric tons CO2e.Current§98.236(d)(1)(vi)Sub-basin ID (for the onshore petroleum and naturalgas production industry segment only).New§98.236(d)(2)(i) and(d)(2)(i)(A)§98.236(c)(3)(ii)(i) If you used Calculation Method 1 or CalculationMethod 2 as specified in § §98.233(d) to calculate CO2emissions from the acid gas removal unit, then youmust report the information specified in paragraphs(d)(2)(i)(A) and (d)(2)(i)(B) of this section.(A) Annual average volumetric fraction of CO2in thevent gas exiting the acid gas removal unit.For Calculation Methodology 1and Calculation Methodology 2of §98.233(d), annual averagefraction of CO2content in thevent from the acid gas removalunit (refer to §98.233(d)(6)).Current7Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(d)(2)(I)(B)Annual volume of gas vented from the acid gasremoval 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 CO2emissions from the acidgas removal unit, then you must report the informationspecified in paragraphs (d)(2)(ii)(A) through(d)(2)(ii)(D) of this section.(A) Which equation was used; Equation W-4A or W4B.New§98.236(d)(2)(ii)(B)§98.236(c)(3)(iii)(B) Annual average volumetric fraction of CO2in thenatural gas flowing out of the acid gas removal unit, asspecified in Equation W-4A or Equation W-4B of thissubpart.For Calculation Methodology 3of §98.233(d), annual averagevolume fraction of CO2contentof natural gas into and out ofthe acid gas removal unit (referto §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 CO2contentin natural gas flowing into the acid gas removal unit, asspecified in Equation W-4A or Equation W-4B of thissubpart.For Calculation Methodology 3of §98.233(d), annual averagevolume fraction of CO2contentof natural gas into and out ofthe acid gas removal unit (referto §98.233(d)(7) and (d)(8)).Current§98.236(d)(2)(ii)(D)§98.236(c)(3)(i)(D) The natural gas flow rate used, as specified inEquation W-4A of this subpart, reported as either totalannual volume of natural gas flow into the acid gasremoval unit in cubic feet at actual conditions; or totalannual volume of natural gas flow out of the acid gasremoval unit, as specified in Equation W-4B of thissubpart, in cubic feet at actual conditions.Total throughput off the acidgas removal unit using a meteror engineering estimate basedon process knowledge or bestavailable data in million cubicfeet per year.Current8Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 CO2emissions from the acidgas removal unit, then you must report the informationspecified in paragraphs (d)(2)(iii)(A) through(d)(2)(iii)(L) of this section, as applicable to thesimulation software package used.(A) The name of the simulation software package used.New§98.236(d)(2)(iii)(B)Natural gas feed temperature, in degrees Fahrenheit.New§98.236(d)(2)(iii)(C)Natural gas feed pressure, in pounds per square inch.New§98.236(d)(2)(iii)(D)§98.236(c)(3)(i)Natural gas flow rate, in standard cubic feet per minute.Total throughput off the acidgas removal unit using a meteror engineering estimate basedon process knowledge or bestavailable data in million cubicfeet per year.Revised§98.236(d)(2)(iii)(E)Acid gas content of the feed natural gas, in molepercent.New§98.236(d)(2)(iii)(F)Acid gas content of the outlet natural gas, in molepercent.New§98.236(d)(2)(iii)(G)Unit operating hours, excluding downtime formaintenance or standby, in hours per year.New§98.236(d)(2)(iii)(H)Exit temperature of the natural gas, in degreesFahrenheit.New§98.236(d)(2)(iii)(I)Solvent pressure, in pounds per square inch.New§98.236(d)(2)(iii)(J)Solvent temperature, in degrees Fahrenheit.New§98.236(d)(2)(iii)(K)Solvent circulation rate, in gallons per minute.New§98.236(d)(2)(iii)(L)Solvent weight, in pounds per gallon.New9Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementDehydrators§98.236(e)Dehydrators. You must indicate whether your facilitycontains any of the following equipment: absorbentdehydrators with an annual average daily natural gasthroughput greater than or equal to 0.4 million standardcubic feet per day, glycol dehydrators with an annualaverage daily natural gas throughput less than 0.4million standard cubic feet per day, and dehydratorsthat use desiccant. If your facility contains any of theequipment listed in this paragraph (e), then you mustreport 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 annualaverage daily natural gas throughput greater than orequal to 0.4 million standard cubic feet per day (asspecified in § §98.233(e)(1)), you must report theinformation 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 productionindustry segment, a different name or ID may be usedfor a single dehydrator foreach location it operates atin a given year.For the onshore natural gasprocessing industry segmentonly, report a unique name orID number for glycoldehydrator.Current§98.236(e)(1)(ii)§98.236(c)(4)(i)(A)Dehydrator feed natural gas flow rate in millionstandard cubic feet per day, determined by engineeringestimate based on best available data.Glycol dehydrator feed naturalgas flow rate in MMscfd,determined by engineeringestimate based on best availabledata.Current§98.236(e)(1)(iii)Dehydrator feed natural gas water content, in poundsper million standard cubic feet.New§98.236(e)(1)(iv)Dehydrator outlet natural gas water content, in poundsper million standard cubic feet.New10Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(1)(v)§98.236(c)(4)(i)(B)Dehydrator absorbent circulation pump type (e.g.natural gas pneumatic, airpneumatic, or electric).Glycol dehydrator absorbentcirculation pump typeCurrent§98.236(e)(1)(vi)Dehydrator absorbent circulation rate, in gallons perminute.New§98.236(e)(1)(vii)§98.236(c)(4)(i)(E)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)Whether stripper gas is used in dehydrator.Whether stripper gas is used inglycol dehydrator.Current§98.236(e)(1)(ix)§98.236(c)(4)(i)(D)Whether a flash tank separator is used in dehydrator.Whether a flash tank separatoris used in glycol dehydrator.Current§98.236(e)(1)(x)§98.236(c)(4)(i)(F)Total time the dehydrator is operating, in hours.Total time the glycoldehydrator is operating inhours.Current§98.236(e)(1)(xi)§98.236(c)(4)(i)(G)Temperature of the wet natural gas, in degreesFahrenheit.Temperature, in degreesFahrenheit and pressure, inpsig, of the wet natural gas.Current§98.236(e)(1)(xii)Pressure of the wet natural gas, in pounds per squareinch gauge.New§98.236(e)(1)(xiii)§98.236(c)(4)(i)(H)Mole fraction of CH4in wet natural gas.Concentration of CH4and CO2in wet natural gas.Current§98.236(e)(1)(xiv)§98.236(c)(4)(i)(H)Mole fraction of CO2in wet natural gas.Concentration of CH4and CO2in wet natural gas.Current§98.236(e)(1)(xv)§98.236(c)(4)(i)(I)Whether any dehydrator emissions are vented to avapor 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)Whether any dehydrator emissions are vented to a flareor regenerator firebox/fire tubes...What vent gas controls are used(refer to §98.233(e)(3) and(e)(4)).Current11Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 orregenerator firebox/fire tubes, report the informationspecified in paragraphs (e)(1)(xvi)(A) through(e)(1)(xvi)(C) of this section for these emissions fromthe dehydrator.(A) Annual CO2emissions, in metric tons CO2, for thedehydrator, calculated according to § §98.233(e)(6).For each glycol dehydrator,report annual CO2, CH4, andN2O emissions that resultedfrom flaring process gas fromthe dehydrator, expressed inmetric tons CO2e for each gas.Current§98.236(e)(1)(xvi)(B)§98.236(c)(4)(i)(K)Annual CH4emissions, in metric tons CH4, for thedehydrator, calculated according to § §98.233(e)(6).For each glycol dehydrator,report annual CO2, CH4, andN2O emissions that resultedfrom flaring process gas fromthe dehydrator, expressed inmetric tons CO2e for each gas.Current§98.236(e)(1)(xvi)(C)§98.236(c)(4)(i)(K)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, andN2O emissions that resultedfrom flaring process gas fromthe dehydrator, expressed inmetric tons CO2e for each gas.Current§98.236(e)(1)(xvii)Whether any dehydrator emissions are vented to theatmosphere without being routed to a flare orregenerator firebox/fire tubes.New§98.236(e)(1)(xvii)and (e)(1)(xvii)(A)§98.236(c)(4)(i)(J)(xvii) If any emissions arenot routed to a flare orregenerator firebox/fire tubes,then you must report theinformation specified in paragraphs (e)(1)(xvii)(A) and(e)(1)(xvii)(B) of this section for those emissions fromthe dehydrator.(A) Annual CO2emissions, in metric tons CO2, for thedehydrator when not venting to a flare or regeneratorfirebox/fire tubes, calculated according to §§98.233(e)(1) and (e)(5).For each glycol dehydrator,report annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.Current12Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(1)(xvii)(B)§98.236(c)(4)(i)(J)Annual CH4emissions, in metric tons CH4, for thedehydrator when not venting to a flare or regeneratorfirebox/fire tubes, calculated according to §§98.233(e)(1) and (e)(5).For each glycol dehydrator,report annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.Current§98.236(e)(1)(xviii)Sub-basin ID (for the onshore petroleum and naturalgas production industry segment only).New§98.236(e)(2)(i)§98.236(c)(4)(ii)(A)(2) For glycol dehydrators with an annual average dailynatural gas throughput less than 0.4 million standardcubic 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 entirefacility.(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)Whether any dehydrators reported in paragraph(e)(2)(i) of this section were vented to a vapor recoverydevice....Which vent gas controls areused (refer to §98.233(e)(3) and(e)(4)).Current§98.236(e)(2)(ii)...If any dehydrators reported in paragraph (e)(2)(i) ofthis section are vented to avapor recovery device, thenyou must report the total number of dehydrators at thefacility that vented to a vapor recovery device.New§98.236(e)(2)(iii)§98.236(c)(4)(ii)(B)Whether any dehydrators reported in paragraph(e)(2)(i) of this section were vented to a control deviceother than a vapor recovery device or a flare orregenerator firebox/fire tubes....Which vent gas controls areused (refer to §98.233(e)(3) and(e)(4)).Current§98.236(e)(2)(iii)...If any dehydrators reported in paragraph (e)(2)(i) ofthis section were vented to a control device other than avapor recovery device or a flare or regeneratorfirebox/fire tubes, then you must specify the type ofcontrol device and the numberof dehydrators at thefacility that were vented to each type of control device.New13Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(2)(iv)Whether any dehydrators reported in paragraph(e)(2)(i) of this section were vented to a flare orregenerator firebox/fire tubes....New§98.236(e)(2)(iv)and (e)(2)(iv)(A)...If any dehydrators reported in paragraph (e)(2)(i) ofthis section were vented to a flare or regeneratorfirebox/fire tubes, then you must report the informationspecified in paragraphs (e)(2)(iv)(A) through(e)(2)(iv)(D) of this section.(A) The total number of dehydrators venting to a flareor regenerator firebox/fire tubes.New§98.236(e)(2)(iv)(B)§98.236(c)(4)(ii)(D)Annual CO2emissions, in metric tons CO2, for thedehydrators reported in paragraph (e)(2)(iv)(A) of thissection, calculated according to § §98.233(e)(6).Report annual CO2, CH4, andN2O emissions at the facilitylevel that resulted from theflaring of process gas,expressed in metric tons CO2efor each gas, combined for allglycol dehydrators with annualaverage daily throughput of lessthan 0.4 MMscfd.Current§98.236(e)(2)(iv)(C)§98.236(c)(4)(ii)(D)Annual CH4emissions, in metric tons CH4, for thedehydrators reported in paragraph (e)(2)(iv)(A) of thissection, calculated according to § §98.233(e)(6).Report annual CO2, CH4, andN2O emissions at the facilitylevel that resulted from theflaring of process gas,expressed in metric tons CO2efor each gas, combined for allglycol dehydrators with annualaverage daily throughput of lessthan 0.4 MMscfd.Current14Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(2)(iv)(D)§98.236(c)(4)(ii)(D)Annual N2O emissions, in metric tons N2O, for thedehydrators reported in paragraph (e)(2)(iv)(A) of thissection, calculated according to § §98.233(e)(6).Report annual CO2, CH4, andN2O emissions at the facilitylevel that resulted from theflaring of process gas,expressed in metric tons CO2efor each gas, combined for allglycol dehydrators with annualaverage daily throughput of lessthan 0.4 MMscfd.Current§98.236(e)(2)(v) and(e)(2)(v)(A)§98.236(c)(4)(ii)(C)For dehydrators reported in paragraph (e)(2)(i) of thissection that were not ventedto a flare or regeneratorfirebox/fire tubes, report the information specified inparagraphs (e)(2)(v)(A) and (e)(2)(v)(B) of this section.(A) Annual CO2emissions in metric tons CO2, foremissions from all dehydrators reported in paragraph(e)(2)(i) of this section thatwere not vented to a flareor regenerator firebox/fire tubes, calculated accordingto § §98.233(e)(2), (e)(4), and (e)(5), where emissionsare added together for all such dehydrators.Report annual CO2and CH4emissions at the facility levelthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas, combined for allglycol dehydrators with annualaverage daily throughput of lessthan 0.4 MMscfd.Current§98.236(e)(2)(v)(B)§98.236(c)(4)(ii)(C)Annual CH4emissions in metric tons CO2, foremissions from all dehydrators reported in paragraph(e)(2)(i) of this section thatwere not vented to a flareor regenerator firebox/fire tubes, calculated accordingto § §98.233(e)(2), (e)(4), and (e)(5), where emissionsare added together for all such dehydrators.Report annual CO2and CH4emissions at the facility levelthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas, combined for allglycol dehydrators with annualaverage daily throughput of lessthan 0.4 MMscfd.Current15Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(3) and(e)(3)(i)§98.236(c)(4)(iii)(A)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (the totalnumber of dehydrators.)Count of desiccant dehydrators.Current§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (whetherany dehydrator emissions were vented to a vaporrecovery device).New§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (the totalnumber of dehydrators vented to a vapor recoverydevice)New16Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (whetherany dehydrator emissions were vented to a controldevice other than a vapor recovery device or a flare orregenerator firebox/fire tubes, and the control devicetype).New§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (thenumber of dehydrators vented to a control device otherthan a vapor recovery device or a flare or regeneratorfirebox/fire tubes)New§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (whetherany glycol dehydrator emissions are vented to a flare orregenerator firebox/fire tubes.)New17Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(3) and(e)(3)(i)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (the totalnumber of dehydrators venting to a flare or regeneratorfirebox/fire tubes.)New§98.236(e)(3) and(e)(3)(i)§98.236(c)(4)(iii)(B)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (AnnualCO2emissions for the dehydrators venting to a flare orfirebox/fire tubes)Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all absorbentdesiccant dehydratorscombined.Current§98.236(e)(3) and(e)(3)(i)§98.236(c)(4)(iii)(B)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (AnnualCH4emissions for the dehydrators venting to a flare orfirebox/fire tubes.)Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all absorbentdesiccant dehydratorscombined.Current18Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(e)(3) and(e)(3)(i)§98.236(c)(4)(iii)(B)(3) For dehydrators that usedesiccant (as specified in §§98.233(e)(3)), you must report the informationspecified in paragraphs (e)(3)(i) through (e)(3)(iii) ofthis section for the entire facility.(i) The same information specified in paragraphs(e)(2)(i) through (e)(2)(iv) of this section for glycoldehydrators, and report the information under thisparagraph for dehydrators that use desiccant. (AnnualN2O emissions for the dehydrators venting to a flare orfirebox/fire tubes.)Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all absorbentdesiccant dehydratorscombined.Current§98.236(e)(3)(ii)§98.236(c)(4)(iii)(B)Annual CO2emissions in metric tons CO2, foremissions from all desiccant dehydrators reportedunder paragraph (e)(3)(i) of this section that are notventing to a flare or regenerator firebox/fire tubes,calculated according to § §98.233(e)(3), (e)(4), and(e)(5), and summing for all such dehydrators.Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all absorbentdesiccant dehydratorscombined.Current§98.236(e)(3)(iii)§98.236(c)(4)(iii)(B)Annual CH4emissions in metric tons CH4, foremissions from all desiccant dehydrators reported inparagraph (e)(3)(i) of this section that are not ventingto a flare or regenerator firebox/fire tubes, calculatedaccording to § §98.233(e)(3),(e)(4), and (e)(5), andsumming for all such dehydrators.Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, for all absorbentdesiccant dehydratorscombined.CurrentLiquids Unloading§98.236(f)Liquids unloading. You must indicate whether wellventing for liquids unloading occurs at your facilityNew§98.236(f)Indicate which methods (as specified in § §98.233(f))were used to calculate emissions.New19Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(f), (f)(1),and (f)(1)(i)If your facility performs well venting for liquidsunloading and uses Calculation Method 1, then youmust report the information specified in paragraph(f)(1) of this section....(1) For each sub-basin and well tubing diameter andpressure grouping for which you used CalculationMethod 1 to calculate natural gas emissions from wellventing for liquids unloading, report the informationspecified in paragraphs (f)(1)(i) through (f)(1)(xii) ofthis section. Report information separately for wellswith plunger lifts and wells without plunger lifts.(i) Sub-basin ID.New§98.236(f)(1)(ii)Well tubing diameter and pressure group ID.New§98.236(f)(1)(iii)§98.236(c)(5)(i)(B)Plunger lift indicator.Count of plunger lifts. Whetherthe selected well from the tubingdiameter and pressure groupcombination had a plunger lift(yes/no).Current§98.236(f)(1)(iv)§98.236(c)(5)(i)(A)Count of wells vented to the atmosphere for the subbasin/well tubing diameter and pressure grouping.Count of wells vented to theatmosphere for liquidsunloading.Revised§98.236(f)(1)(v)Percentage of wells for which the monitoring periodused to determine the cumulative amount of timeventing was not the full calendar year.New§98.236(f)(1)(vi)Cumulative amount of time wells were vented (sum of“Tp” from Equation W-7A or W-7B of this subpart) inhours.New§98.236(f)(1)(vii)§98.236(c)(5)(i)(C)Cumulative number of unloadings vented to theatmosphere for each well, aggregated across all wellsin the sub-basin/well tubing diameter and pressuregrouping.Cumulative number ofunloadings vented to theatmosphere.Current20Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(f)(1)(viii)Annual natural gas emissions, in standard cubic feet,from well venting for liquids unloading, calculatedaccording to § §98.233(f)(1).New§98.236(f)(1)(ix)§98.236(c)(5)(i)(H)Annual CO2emissions, in metric tons CO2, from wellventing for liquids unloading, calculated according to §§98.233(f)(1) and § §98.233(f)(4).Report annual CO2and CH4emissions, expressed in metrictons CO2e for each gas.Current§98.236(f)(1)( x)§98.236(c)(5)(i)(H)Annual CH4emissions, in metric tons CH4, from wellventing for liquids unloading, calculated according to §§98.233(f)(1) and § §98.233(f)(4).Report annual CO2and CH4emissions, expressed in metrictons CO2e for each gas.Current§98.236(f)(1)(xi)and (f)(1)(xi)(A)(xi) For each well tubing diameter group and pressuregroup combination, you must report the informationspecified in paragraphs (f)(1)(xi)(A) through(f)(1)(xi)(E) of this section for each individual well notusing a plunger lift that was tested during the year.(A) API number of tested well.New§98.236(f)(1)(xi)(B)§98.236(c)(5)(i)(F)Casing pressure, in pounds per square inch absolute.Casing pressure, in psia, of eachwell selected to representemissions in that tubing sizegroup and pressure groupcombination that does not have aplunger lift.Current§98.236(f)(1)(xi)(C)§98.236(c)(5)(i)(E)Internal casing diameter, in inches.Internal casing diameter orinternal tubing diameter ininches, where applicable, . ..selected to represent emissionsin that tubing size and pressurecombination.Current§98.236(f)(1)(xi)(D)§98.236(c)(5)(i)(E)Measured depth of the well in feet.. . . well depth of each well, infeet, selected to representemissions in that tubing size andpressure combination.Current21Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(f)(1)(xi)(E)§98.236(c)(5)(i)(D)Average flow rate of the well venting over the durationof the liquids unloading, in standard cubic feet perhour.Average flow rate of themeasured well venting in cubicfeet 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 pressuregroup combination, you must report the informationspecified in paragraphs (f)(1)(xii)(A) through(f)(1)(xii)(E) of this section for each individual wellusing 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)The tubing pressure, in pounds per square inchabsolute.Tubing pressure, in psia, of eachwell selected to representemissions in a tubing size groupand pressure group combinationthat has a plunger lift.Current§98.236(f)(1)(xii)(C)§98.236(c)(5)(i)(E)The internal tubing diameter, in inches.Internal casing diameter orinternal tubing diameter ininches, where applicable, . ..selected to represent emissionsin that tubing size and pressurecombination.Current§98.236(f)(1)(xii)(D)§98.236(c)(5)(i)(E)Measured depth of the well, in feet.. . .well depth of each well, infeet, selected to representemissions in that tubing size andpressure combination.Current§98.236(f)(1)(xii)(E)§98.236(c)(5)(i)(D)Average flow rate of the well venting over the durationof the liquids unloading, in standard cubic feet perhour.Average flow rate of themeasured well venting in cubicfeet per hour (refer to§98.233(f)(1)(i)(A)).Current22Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(f), (f)(2),and (f)(2)(i)(f)...If the facility performs liquids unloading and usesCalculation Method 2 or 3, then you must report theinformation specified in paragraph (f)(2) of thissection.(2) For each sub-basin for which you used CalculationMethod 2 or 3 (as specifiedin § 93.233(f)) to calculatenatural gas emissions from well venting for liquidsunloading, you must report the information in (f)(2)(i)through (f)(2)(x) of this section. Report informationseparately for each calculation method.(i) Sub-basin IDNew§98.236(f)(2)(ii)Calculation method.New§98.236(f)(2)(iii)§98.236(c)(5)(ii)(B)Plunger lift indicator.Count of plunger lifts.Current§98.236(f)(2)(iv)§98.236(c)(5)(ii)(A)Number of wells vented to the atmosphere.Count of wells vented to theatmosphere for liquidsunloading.Current§98.236(f)(2)(v)§98.236(c)(5)(ii)(C)Cumulative number of unloadings vented to theatmosphere for each well, aggregated across all wells.Cumulative number ofunloadings vented to theatmosphere.Current§98.236(f)(2)(vi)Annual natural gas emissions, in standard cubic feet,from well venting for liquids unloading, calculatedaccording to § §98.233(f)(2) or § §98.233(f)(3), asapplicable.New§98.236(f)(2)(vii)§98.236(c)(5)(ii)(E)Annual CO2emissions, in metric tons CO2, from wellventing for liquids unloading, calculated according to §§98.233(f)(2) or § §98.233(f)(3), as applicable, and §§98.233(f)(4).Report annual CO2and CH4emissions, expressed in metrictons CO2e for each GHG gas.Current§98.236(f)(2)(viii)§98.236(c)(5)(ii)(E)Annual CH4emissions, in metric tons CH4, from wellventing for liquids unloading, calculated according to §§98.233(f)(2) or § §98.233(f)(3), as applicable, and §§98.233(f)(4).Report annual CO2and CH4emissions, expressed in metrictons CO2e for each GHG gas.Current23Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(f)(2)(ix)§98.236(c)(5)(ii)(D)For wells without plunger lifts, the average internalcasing diameter, in inches.Average internal casingdiameter, in inches, for all wells,where applicable.Current§98.236(f)(2)(x)§98.236(c)(5)(i)(E)For wells with plunger lifts, the average internal tubingdiameter, in inches.Internal casing diameter orinternal tubing diameter ininches, where applicable, andwell depth of each well, in feet,selected to represent emissionsin that tubing size and pressurecombination.CurrentCompletions and Workovers with Hydraulic Fracturing§98.236(g)You must indicate whether your facility had any gaswell completions or workovers with hydraulicfracturing during the calendar year....New§98.236(g) and(g)(1)(g)...If your facility had gas well completions orworkovers with hydraulic fracturing during thecalendar year, then you must report informationspecified in paragraphs (g)(1) through (g)(10) of thissection, for each sub-basin and well type combination.Report information separately for completions andworkovers.(1) Sub-basin ID.New§98.236(g)(2)Well type.New§98.236(g)(3)§98.236(c)(6)(i)(A)and (C)Number of completions or workovers in the category.(A)Total count of completionsin calendar year.(C) Total count of workovers incalendar year that flare gas orvent gas to the atmosphere.Revised§98.236(g)(4)Calculation method used.New24Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 annualvolumetric total gas emissions, then you must reportthe information specified in paragraphs (g)(5)(i)and(g)(5)(ii) of this section.(i) Cumulative backflow time, in hours, for each subbasin (“Tp” in Equation W-10A).(E) When using Equation W10A, total number of days ofbackflow from all wells duringcompletions.(F) When using Equation W10A, total number of days ofbackflow from all wells duringworkovers.Current§98.236(g)(5)(ii)§98.236(c)(6)(i)(B)and (D)Measured flowback rate, in standard cubic feet perhour, for each sub-basin (“FRs,p” in Equation W-12A).(B) When using Equation W10A, measured flow rate ofbackflow during wellcompletion in standard cubicfeet per hour.(D) When using Equation W10A, measured flow rate ofbackflow during well workoverin standard cubic feet per hour.Current§98.236(g)(6)If you used Equation W-10B to calculate annualvolumetric total gas emissions for completions thatvent gas to the atmosphere, then you must report thevented natural gas volume, in standard cubic feet, foreach well in the sub-basin (“FVs,p” in Equation W10B).New§98.236(g)(7)Annual gas emissions, instandard cubic feet (“Es,n”inEquation W-10A or W-10B).New25Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(g)(8)§98.236(c)(6)(i)(I)and (J)Annual CO2emissions, in metric tons CO2.(I) Annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for eachgas.(J) Annual CO2, CH4, andN2O emissions that resultedfrom flares, expressed in metrictons CO2e for each gas.Current§98.236(g)(9)§98.236(c)(6)(i)(I)and (J)Annual CH4emissions, in metric tons CH4.(I) Annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.(J) Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current§98.236(g)(10)§98.236(c)(6)(i)(J)If the well emissions were vented to a flare, then youmust report the total N2O emissions, in metric tonsN2O.(I) Annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.(J) Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.CurrentCompletions and Workovers without Hydraulic Fracturing§98.236(h)You must indicate whether the facility had any gas wellcompletions without hydraulic fracturing or any gaswell workovers without hydraulic fracturing, and if theactivities occurred withor without flaring....New26Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(h), (h)(1),and (h)(1)(i)(h)...If the facility had gas well completions orworkovers without hydraulic fracturing, then you mustreport the information specified in paragraphs (h)(1)through (h)(4) of this section, as applicable.(1) For each sub-basin with gas well completionswithout hydraulic fracturing and without flaring, reportthe information specified in paragraphs (h)(1)(i)through (h)(1)(vi) of this section.(i) Sub-basin IDNew§98.236(h)(1)(ii)§98.236(c)(6)(ii)(A)Number of well completions that vented gas directly tothe atmosphere without flaring.Total count of completions incalendar year.Revised§98.236(h)(1)(iii)§98.236(c)(6)(ii)(C)Total number of hours that gas vented directly to theatmosphere during backflow for all completions in thesub-basin category (the sum of all “Tp” for completionsthat vented to the atmosphere as used in Equation W13B).Total number of days of gasventing to the atmosphereduring backflow forcompletion.Current§98.236(h)(1)(iv)Average daily gas production rate for all completionswithout hydraulic fracturingin the sub-basin withoutflaring, in standard cubic feet per hour (average of all“Vp” used in Equation W-13B).New§98.236(h)(1)(v)§98.236(c)(6)(ii)(D)Annual CO2emissions, in metric tons CO2, thatresulted from completions venting gas directly to theatmosphere (“Es,p” from Equation W-13B forcompletions that vented directly to the atmosphere,converted to mass emissions according to§98.233(h)(1)).(D) Annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.Current§98.236(h)(1)(vi)§98.236(c)(6)(ii)(D)Annual CH4emissions, in metric tons CH4, thatresulted from completions venting gas directly to theatmosphere (Es,pfrom Equation W-13B forcompletions that vented directly to the atmosphere,converted to mass emissions according to§98.233(h)(1)).(D) Annual CO2and CH4emissions that resulted fromventing gas directly to theatmosphere, expressed inmetric tons CO2e for each gas.Current27Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(h)(2) and(h)(2)(i)(2) For each sub-basin with gas well completionswithout hydraulic fracturing and with flaring, report theinformation 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)Number of well completions that flared gas.Total count of completions incalendar year.Revised§98.236(h)(2)(iii)Total number of hours that gas vented to a flare duringbackflow for all completionsin the sub-basin category(the sum of all “Tp” for completions that vented to aflare from Equation W-13B).New§98.236(h)(2)(iv)Average daily gas production rate for all completionswithout hydraulic fracturing in the sub-basin withflaring, in standard cubic feet per hour (the average ofall “Vp” from Equation W-13B).New§98.236(h)(2)(v)§98.236(c)(6)(ii)(E)Annual CO2emissions, in metric tons CO2, thatresulted from completions that flared gas calculatedaccording to §98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current§98.236(h)(2)(vi)§98.236(c)(6)(ii)(E)Annual CH4emissions, in metric tons CH4, thatresulted from completions that flared gas calculatedaccording to §98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current§98.236(h)(2)(vii)§98.236(c)(6)(ii)(E)Annual N2O emissions, in metric tons N2O, thatresulted from completions that flared gas calculatedaccording to §98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current§98.236(h)(3) and(h)(3)(i)(3) For each sub-basin with gas well workoverswithout hydraulic fracturing and without flaring, reportthe information specified in paragraphs (h)(3)(i)through (h)(3)(iv) of this section.(i) Sub-basin ID.New28Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(h)(3)(ii)§98.236(c)(6)(ii)(B)Number of workovers that vented gas to theatmosphere without flaring .Total count of workovers incalendar year that flare gas orvent gas to the atmosphere.Current§98.236(h)(3)(iii)§98.236(c)(6)(ii)(D)Annual CO2emissions, in metric tons CO2per year,that resulted from workovers venting gas directly to theatmosphere (“Es,wo” in Equation W-13A for workoversthat vented directly to the atmosphere, converted tomass emissions as specified in §98.233(h)(1)).Annual CO2and CH4emissionsthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas.Current§98.236(h)(3)(iv)§98.236(c)(6)(ii)(D)Annual CH4emissions, in metric tons CH4per year,that resulted from workovers venting gas directly to theatmosphere (“Es,wo” in Equation W-13A for workoversthat vented directly to the atmosphere, converted tomass emissions as specified in §98.233(h)(1)).Annual CO2and CH4emissionsthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas.Current§98.236(h)(4) and(h)(4)(i)(4) For each sub-basin with gas well workoverswithout hydraulic fracturing and with flaring, report theinformation 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)Number of workovers that flared gas.Total count of workovers incalendar year that flare gas orvent gas to the atmosphere.Current§98.236(h)(4)(iii)§98.236(c)(6)(ii)(E)Annual CO2emissions, in metric tons CO2per year,that resulted from workoversthat flared gas calculatedas specified in§98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current§98.236(h)(4)(iv)§98.236(c)(6)(ii)(E)Annual CH4emissions, in metric tons CH4per year,that resulted from workoversthat flared gas, calculatedas specified in§98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.Current29Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(h)(4)(v)§98.236(c)(6)(ii)(E)Annual N2O emissions, in metric tons N2O per year,that resulted from workoversthat flared gas calculatedas specified in§98.233(h)(2).Annual CO2, CH4, and N2Oemissions that resulted fromflares, expressed in metric tonsCO2e for each gas.CurrentBlowdown Vent Stacks§98.236(i)You must indicate whether your facility has blowdownvent stacks....New§98.236(i)...If your facility has blowdown vent stacks, then youmust report whether emissions were calculated byequipment type or by using flow meters....New§98.236(i) and (i)(1)(i)...If you calculated emissions by equipment type,then you must report the information specified inparagraph (i)(1) of this section...(1) ...you must report the equipment types...New§98.236(i)(1)(i)(1) If you calculated emissions from blowdown ventstacks by equipment type, then you must report...theinformation specified in paragraphs (i)(1)(i) through(i)(1)(iii) of this section for reach equipment type. If ablowdown event resulted in emissions from multipleequipment types, then you must report the informationin paragraphs (i)(1)(i) through (i)(1)(iii) of this sectionfor the equipment type that represented the largestportion of the emissions for the blowdown event.(i) Total number of blowdowns in the calendar year forthe equipment type (the sum of equation variable “N”from Equation W-14A or Equation W-14B of thissubpart for all unique physical volumes for theequipment type).New§98.236(i)(1)(ii)Annual CO2emissions for the equipment type, inmetric tons CO2, as calculated according to §§98.233(i)(2)(iii).New30Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(i)(1)(iii)Annual CH4emissions for the equipment type, inmetric tons CH4, as calculated according to§98.233(i)(2)(iii).New§98.236(i)(2) and(i)(2)(i)(2) If you elect to calculate emissions from blowdownvent stacks by using a flow meter according to§98.233(i)(3), then you must report the informationspecified in paragraphs (i)(2)(i) and (i)(2)(ii) of thissection for the facility.(i) Annual CO2emissions from all blowdown ventstacks at the facility, in metric tons CO2(the sum of allCO2mass emission values calculated according to §§98.233(i)(3) for all flow meters).New§98.236(i)(2)(ii)Annual CH4emissions from all blowdown vent stacksat the facility, in metric tons CH4, (the sum of all CH4mass emissions values calculated according to §§98.233(i)(3) for all flow meters).NewOnshore Production Storage Tanks§98.236(j)You must indicate whether your facility sendsproduced oil to atmospheric tanks.New§98.236(j)If your facility sends produced oil to atmospherictanks, then you must indicate which CalculationMethod(s) you used to calculate GHG emissions...New§98.236(j)If any atmospheric tanks were observed to havemalfunctioning dump valves during the calendar year,then you must indicate that dump valves weremalfunctioning...New§98.236(j)(1) and(j)(1)(i)(1) If you used Calculation Method 1 or CalculationMethod 2 to calculate GHG emissions, then you mustreport 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.New31Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(1)(ii)Calculation method used, and name of the softwarepackage used if using Calculation Method 1.New§98.236(j)(1)(iii)§98.236(c)(8)(i)(F)The total annual gas-liquid separator oil volume that issent to applicable onshore production storage tanks, inbarrels.Total volume of oil from allwellhead separators sent totank(s) in barrels per year.Current§98.236(j)(1)(iv)§98.236(c)(8)(i)(B)The average gas-liquid separator temperature, indegrees.Estimated average separatortemperature, in degreesFahrenheit,Current§98.236(j)(1)(v)§98.236(c)(8)(i)(B)The average gas-liquid separator pressure, in poundsper square inch gauge.Estimated average separator . . .estimated average pressure, inpsig.Current§98.236(j)(1)(vi)§98.236(c)(8)(i)(C)The average sales oil or stabilized oil API gravity, indegrees.Estimated average sales oilstabilized API gravity, indegrees.Current§98.236(j)(1)(vii)§98.236(c)(8)(i)(I)The minimum and maximum concentration (molefraction) of CO2in flash gas from onshore productionstorage tanks.Range of concentrations offlash gas, CH4and CO2.Current§98.236(j)(1)(viii)§98.236(c)(8)(i)(I)The minimum and maximum concentration (molefraction) of CH4in flash gas from onshore productionstorage tanks.Range of concentrations offlash gas, CH4and CO2.Current§98.236(j)(1)(ix)§98.236(c)(8)(i)(A)The number of wells sending oil to gas-liquidseparators or directly to atmospheric tanks.Number of wellhead separatorssending oil to atmospherictanks.Current§98.236(j)(1)(x)§98.236(c)(8)(i)(D)The number of atmospheric tanks.Count of hydrocarbon tanks atwell pads.Current§98.236(j)(1)(xi)§98.236(c)(8)(i)(E)An estimate of the number of atmospheric tanks, not onwell-pads, receiving your oil.Best estimate of count of stocktanks not at well pads receivingyour oil.Current32Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(1)(xii)(A)§98.236(c)(8)(i)(G)(xii) If any emissions from of the atmospheric tanks atyour facility were controlled with vapor recoverysystems, then you must indicate and report theinformation specified in paragraphs (j)(1)(xii)(A)through (j)(1)(xii)(E) of this section.(A) The number of atmospheric tanks that controlemissions with vapor recovery systems.Count of tanks with emissionscontrol measures, either vaporrecovery systemor flaring, fortanks at well pads.Current§98.236(j)(1)(xii)(B)§98.236(c)(8)(i)(K)Total CO2mass, in metric tons CO2, that was recoveredduring the calendar yearusing a vapor recoverysystem.Annual CO2and CH4gasquantities that were recovered,expressed in metric tons CO2efor each gas, for all wellheadgas-liquid separators or storagetanks using CalculationMethodology 1, and for allwellhead gas-liquid separatorsor storage tanks usingCalculation Methodology 2 of§98.233(j).Current§98.236(j)(1)(xii)(C)§98.236(c)(8)(i)(K)Total CH4mass, in metric tons CH4, that was recoveredduring the calendar yearusing a vapor recoverysystem.Annual CO2and CH4gasquantities that were recovered,expressed in metric tons CO2efor each gas, for all wellheadgas-liquid separators or storagetanks using CalculationMethodology 1, and for allwellhead gas-liquid separatorsor storage tanks usingCalculation Methodology 2 of§98.233(j).Current33Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(1)(xii)(D)§98.236(c)(8)(i)(J)Annual CO2emissions, in metric tons CO2, fromatmospheric tanks equipped with vapor recoverysystems.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology1, and for all wellhead gasliquid separators or storagetanks using CalculationMethodology 2 of §98.233(j).Current§98.236(j)(1)(xii)(E)§98.236(c)(8)(i)(J)Annual CH4emissions, in metric tons CH4, fromatmospheric tanks equipped with vapor recoverysystems.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology1, and for all wellhead gasliquid separators or storagetanks using CalculationMethodology 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 ventedgas directly to the atmosphere without using a vaporrecovery system or without flaring, then you mustreport 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 gasdirectly to the atmosphere without using a vaporrecovery system or without flaring.Count of tanks with emissionscontrol measures, either vaporrecovery systemor flaring, fortanks at well pads.Current34Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(1)(xiii)(B)§98.236(c)(8)(i)(J)Annual CO2emissions, in metric tons CO2, thatresulted from venting gas directly to the atmosphere.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology1, and for all wellhead gasliquid separators or storagetanks using CalculationMethodology 2 of §98.233(j).Current§98.236(j)(1)(xiii)(C)§98.236(c)(8)(i)(J)Annual CH4emissions, in metric tons CH4, thatresulted from venting gas directly to the atmosphere.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology1, and for all wellhead gasliquid separators or storagetanks using CalculationMethodology 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 atmospherictanks at your facility with one or more flares, then youmust 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 controlledemissions with flares.Count of tanks with emissionscontrol measures, either vaporrecovery systemor flaring, fortanks at well pads.Current35Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(1)(xiv)(B)§98.236(c)(8)(i)(L)Annual CO2emissions, in metric tons CO2, fromatmospheric tanks that controlled emissions with one ormore flares.Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, for allwellhead gas-liquid separatorsor storage tanks usingCalculation Methodology 1,and for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology2 of §98.233(j).Current§98.236(j)(1)(xiv(C)§98.236(c)(8)(i)( L)Annual CH4emissions, in metric tons CH4, fromatmospheric tanks that controlled emissions with oneore more flares.Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, for allwellhead gas-liquid separatorsor storage tanks usingCalculation Methodology 1,and for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology2 of §98.233(j).Current§98.236(j)(1)(xiv)(D)§98.236(c)(8)(i)(L)Annual N2O emissions, in metric tons N2O, fromatmospheric tanks that controlled emissions with one ormore flares.(I) Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, for allwellhead gas-liquid separatorsor storage tanks usingCalculation Methodology 1,and for all wellhead gas-liquidseparators or storage tanksusing Calculation Methodology2 of §98.233(j).Current36Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 GHGemissions, then you must report the informationspecified in paragraph (j)(2)(i) through (j)(2)(iii) of thisparagraph.(i) Report the information specified in paragraphs(j)(2)(i)(A) through (j)(2)(i)(F) of this section at thebasin level for atmospheric tanks where emissions werecalculated using Calculation Method 3.(A) The total annual oil throughput that is sent toatmospheric tanks in the basin, in barrels.Total volume of oil productionin barrels per year.Revised§98.236(j)(2)((i)(B)§98.236(c)(8)(iii)(D)An estimate of the fraction of oil throughput reportedin paragraph (j)(2)(i)(A) sent to atmospheric tanks inthe basin that controlled emissions with flares.Best estimate of fraction ofproduction sent to tanks withassumed control measures:either vapor recovery system orflaring of tank vapors.Current§98.236(j)(2)((i)(C)§98.236(c)(8)(iii)(D)An estimate of the fraction of oil throughput reportedin paragraph (j)(2)(i)(A) sent to atmospheric tanks inthe basin that controlled emissions with vapor recoverysystems.Best estimate of fraction ofproduction sent to tanks withassumed control measures:either vapor recovery system orflaring of tank vapors.Current§98.236(j)(2)((i)(D)§98.236(c)(8)(iii)(E)The number of atmospheric tanks, in the basin.Count of hydrocarbon tanks onwell pads.Current§98.236(j)(2)((i)(E)§98.236(c)(8)(iii)(A)The number of wells with gas-liquid separators(“Count” from Equation W-15 of this subpart), in thebasin.Number of wellhead separators.Current§98.236(j)(2)((i)(F)§98.236(c)(8)(iii)(B)The number of wells without gas-liquid separators(“Count” from Equation W-15 of this subpart), in thebasin.Number of wells withoutwellhead separators.Current37Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 foreach sub-basin with atmospheric tanks whoseemissions were calculated using Calculation Method 3and that did not control emissions with flares. (A) Subbasin ID.New§98.236(j)(2)(ii)(B)The number of atmospheric tanks in the sub-basin thatdid not control emissions with flares.New§98.236(j)(2)(ii)(C)§98.236(c)(8)(iii)(F)Annual CO2emissions, in metric tons CO2fromatmospheric tanks in the sub-basin that did not controlemissions with flares, calculated using Equation W-15of this subpart.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,at the sub-basin level forCalculation Methodology 5 of§98.233(j).Current§98.236(j)(2)(ii)(D)§98.236(c)(8)(iii)(F)Annual CH4emissions, in metric tons CH4fromatmospheric tanks in the sub-basin that vent gasdirectly to the atmosphere, calculated using EquationW-15 of this subpart.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,at the sub-basin level forCalculation Methodology 5 of§98.233(j).Current§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 foreach sub-basin with atmospheric tanks whoseemissions were calculated using Calculation Method 3and that controlled emissions with flares.(A) Sub-basin ID.New§98.236(j)(2)(iii)(B)The number of atmospheric tanks in the sub-basin thatcontrolled emissions with flares.New38Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(2)(iii)(C)§98.236(c)(8)(iii)(H)Annual CO2emissions, in metric tons CO2fromatmospheric tanks that controlled emissions with flares.Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, at thesub-basin level for CalculationMethodology 5 of §98.233(j).Current§98.236(j)(2)(iii)(D)§98.236(c)(8)(iii)(H)Annual CH4emissions, in metric tons CH4fromatmospheric tanks that controlled emissions with flares.Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, at thesub-basin level for CalculationMethodology 5 of §98.233(j).Current§98.236(j)(2)(iii)(E)§98.236(c)(8)(iii)(H)Annual N2O emissions, in metric tons fromatmospheric tanks that controlled emissions with flares.Annual CO2,CH4,and N2Oemissions that resulted fromflaring gas, expressed in metrictons CO2e for each gas, at thesub-basin level for CalculationMethodology 5 of §98.233(j).Current§98.236(j)(3) and(j)(3)(i)§98.236(c)(8)(iv)(A)(3) If any gas-liquid separator liquid dump values didnot close properly duringthe calendar year, then youmust report the information specified in paragraphs(j)(3)(i) through (j)(3)(iv) of this section.(i) The total number of gas-liquid separators whoseliquid dump valves did not close properly during thecalendar year.Count of wellhead separatorsthat dump valve factor isapplied.Current§98.236(j)(3)(ii)The total time the dump valves on gas-liquid separatorsdid not close properly in the calendar year, in hours(“Tn” in Equation W-16 of this subpart).New39Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(j)(3)(iii)§98.236(c)(8)(iv)(B)Annual CO2emissions, in metric tons CO2, thatresulted from the dump valves on gas-liquid separatorsnot closing properly during the calendar year,calculated using Equation W-16 of this subpart.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,at the sub-basin level forimproperly functioning dumpvalves.Current§98.236(j)(3)(iv)§98.236(c)(8)(iv)(B)Annual CH4emissions, in metric tons CH4, thatresulted from the dump valves on gas-liquid separatorsnot closing properly during the calendar year,calculated using Equation W-16 of this subpart.Annual CO2and CH4emissionsthat resulted from venting gasto the atmosphere, expressed inmetric tons CO2e for each gas,at the sub-basin level forimproperly functioning dumpvalves.CurrentTransmission Storage Tanks§98.236(k)You must indicate whether your facility contains anytransmission 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 transmissionstorage tank, then you must report the informationspecified in paragraphs (k)(1) through (k)(3) of thissection for each transmission storage tank vent stack.(1) For each transmission storage tank vent stack reportthe information specified in (k)(1)(i) through (k)(1)(iv)of this section.(i) The unique name or ID number for the transmissionstorage tank vent stack.A unique name or ID numberfor the vent stack monitoredaccording to 40 CFR§98.233(k).Current§98.236(k)(1)(ii)Method used to determine if dump valve leakageoccurred.New§98.236(k)(1)(iii)Indicator whether scrubber dump valve leakageoccurred for the transmission storage tank vent.New§98.236(k)(1)(iv)Indicator if there is a flareattached to the transmissionstorage tank vent stack.New40Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(k)(2) and(k)(2)(i)(2) If scrubber dump valve leakage occurred for atransmission storage tank vent stack, as reported inparagraph (k)(1)(iii) and the vent stack vented directlyto the atmosphere during the calendar year, then youmust report the information specified in paragraphs(k)(2)(i) through(k)(2)(v) of this section for eachtransmission storage vent stack where scrubber dumpvalve leakage occurred.(i) Method used to measure the leak rate.New§98.236(k)(2)(ii)Measured leak rate (average leak rate from acontinuous flow measurement device) in standardcubic feet per hour.New§98.236(k)(2)(iii)Duration of time that venting occurred in hours (mayuse best available data if a continuous flowmeasurement device was used).New§98.236(k)(2)(iv)§98.236(c)(9)(i)Annual CO2emissions, in metric tons CO2, thatresulted from venting gas directly to the atmosphere,calculated according to § §98.233(k)(1) through (k)(3).For each vent stack, reportannual CO2and CH4emissionsthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas.Current§98.236(k)(2)(v)§98.236(c)(9)(i)Annual CH4emissions, in metric tons CH4, thatresulted from venting gas directly to the atmosphere,calculated according to § §98.233(k)(1) through (k)(3).For each vent stack, reportannual CO2and CH4emissionsthat resulted from venting gasdirectly to the atmosphere,expressed in metric tons CO2efor each gas.Current41Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(k)(3) and(k)(3)(i)(3) If scrubber dump valve leakage occurred for atransmission storage tank vent stack, as reported inparagraph (k)(1)(iii) and the vent stack vented to a flareduring the calendar year, then you must report theinformation specified in paragraphs (k)(3)(i) through(k)(3)(vi).(i) Method used to measure the leak rate.New§98.236(k)(3)(ii)Measured leakage rate (average leak rate from acontinuous flow measurement device) in standardcubic feet per hour.New§98.236(k)(3)(iii)Duration of time that flaring occurred in hours (mayuse best available data if a continuous flowmeasurement device was used).New§98.236(k)(3)(iv)§98.236(c)(9)(ii)Annual CO2emissions, in metric tons CO2, thatresulted from flaring gas, calculated according to §§98.233(k)(4).For each transmission storagetank, report annual CO2, CH4,and N2O emissions that resultedfrom flaring process gas fromthe transmission storage tank,expressed in metric tons CO2efor each gas.Current§98.236(k)(3)(v)§98.236(c)(9)(ii)Annual CH4emissions, in metric tons CH4, thatresulted from flaring gas, calculated according to §§98.233(k)(4).For each transmission storagetank, report annual CO2, CH4,and N2O emissions that resultedfrom flaring process gas fromthe transmission storage tank,expressed in metric tons CO2efor each gas.Current42Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(k)(3)(vi)§98.236(c)(9)(ii)Annual N2O emissions, in metric tons N2O, thatresulted from flaring gas, calculated according to §§98.233(k)(4).For each transmission storagetank, report annual CO2, CH4,and N2O emissions that resultedfrom flaring process gas fromthe transmission storage tank,expressed in metric tons CO2efor each gas.CurrentWell Testing§98.236(l)You must indicate whether you performed gas well oroil well testing, and if the testing of gas wells or oilwells resulted in vented or flared emissions during thecalendar year....New§98.236(l), (l)(1),and (l)(1)(i)§98.236(c)(10)(i)(l)...If you performed well testing that resulted invented or flared emissions during the calendar year,then you must report the information specified inparagraphs (l)(1) through (l)(4) as applicable.(1) If you used Equation W-17A to calculate annualvolumetric natural gas emissions at actual conditionsfrom oil wells and the emissions are not vented to aflare, then you must reportthe information specified inparagraphs (l)(1)(i) through (l)(1)(vi) of this section.(i) Number of wells tested in the calendar year.Number of wells tested perbasin in calendar year.Current§98.236(l)(1)(ii)§98.236(c)(10)(iii)Average number of well testing days in the calendaryear.Average number of days thewell is tested in a basin.Current§98.236(l)(1)(iii)§98.236(c)(10)(ii)Average gas to oil ratio for well(s) tested, in cubic feetof gas per barrel of oil.Average gas to oil ratio foreach basin.Current§98.236(l)(1)(iv)Average flow rate for well(s) tested, in barrels of oilper day.New43Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(l)(1)(v)§98.236(c)(10)(iv)Annual CO2emissions, in metric tons CO2, ascalculated according to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell testing venting.Current§98.236(l)(1)(vi)§98.236(c)(10)(iv)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell 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 annualvolumetric natural gas emissions at actual conditionsfrom oil wells and the emissions are vented to a flare,then you must report the information specified inparagraphs (l)(2)(i) through (l)(2)(vii) of this section.(i) Number of wells tested in the calendar year.Number of wells tested perbasin in calendar year.Current§98.236(l)(2)(ii)§98.236(c)(10)(iii)Average number of well testing days in the calendaryear.Average number of days thewell is tested in a basin.Current§98.236(l)(2)(iii)§98.236(c)(10)(ii)Average gas to oil ratio for well(s) tested, in cubic feetof gas per barrel of oil.Average gas to oil ratio foreach basin.Current§98.236(l)(2)(iv)Average flow rate for well(s) tested, in barrels of oilper day.New§98.236(l)(2)(v)§98.236(c)(10)(iv)Annual CO2emissions, in metric tons CO2, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell testing venting.Current§98.236(l)(2)(vi)§98.236(c)(10)(iv)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell testing venting.Current44Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(l)(2)(vii)§98.236(c)(10)(iv)Annual N2O emissions, in metric tons N2O, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell 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 annualvolumetric natural gas emissions at actual conditionsfrom gas wells and the emissions were not vented to aflare, then you must reportthe information specified inparagraphs (l)(3)(i) through(l)(3)(v) of this section.(i) Number of wells tested in the calendar year.Number of wells tested perbasin in calendar year.Current§98.236(l)(3)(ii)§98.236(c)(10)(iii)Average number of well testing days in the calendaryear.Average number of days thewell is tested in a basin.Current§98.236(l)(3)(iii)Average annual production rate for well(s) tested inactual cubic feet per day.New§98.236(l)(3)(iv)§98.236(c)(10)(iv)Annual CO2emissions in metric tons CO2, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell testing venting.Current§98.236(l)(3)(v)§98.236(c)(10)(iv)Annual CH4emissions in metric tons CH4, calculatedaccording to § §98.233(l).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromwell 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 annualvolumetric natural gas emissions at actual conditionsfrom gas wells and the emissions were vented to aflare, then you must reportthe information specified inparagraphs (l)(4)(i) through (l)(4)(vi) of this section.(i) Number of wells tested in calendar year.Number of wells tested perbasin in calendar year.Current45Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(l)(4)(ii)§98.236(c)(10)(iii)Average number of well testing days in the calendaryear.Average number of days thewell is tested in a basin.Current§98.236(l)(4)(iii)Average annual production rate for well(s) tested, inactual cubic feet per day.New§98.236(l)(4)(iv)§98.236(c)(10)(v)Annual CO2emissions,, in metric tons CO2, calculatedaccording to § §98.233(l).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom well testing flaring.Current§98.236(l)(4)(v)§98.236(c)(10)(v)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(l).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom well testing flaring.Current§98.236(l)(4)(vi)§98.236(c)(10)(v)Annual N2O emissions, in metric tons N2O, calculatedaccording to § §98.233(l).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom well testing flaring.CurrentAssociated Natural Gas§98.236(m)You must indicate whether any associated gas wasvented or flared during the calendar year....New§98.236(m) and(m)(1)(m)...If associated gas was vented or flared during thecalendar year, then you mustreport the informationspecified in paragraphs (m)(1) through (m)(8) of thissection for each sub-basin.(1) Sub-basin ID.New§98.236(m)(2)Indicator whether any associated gas was venteddirectly to the atmosphere without flaring.New§98.236(m)(3)Indicator whether any associated gas was flared.New46Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(m)(4)§98.236(c)(11)(ii)Average gas to oil ratio, in standard cubic feet of gasper barrel of oil (average of the “GOR” values used inEquation W-18 of this subpart).Average gas to oil ratio foreach basin.Current§98.236(m)(5)Volume of oil produced, in barrels, in the calendar yearduring the time periods in which associated gas wasvented or flared (the sum of “Vp,q” used in Equation W18 of this subpart).New§98.236(m)(6)Total volume of associated gas sent to sales, instandard cubic feet, in the calendar year during timeperiods in which associated gas was vented or flared(the sum of “SG” values used in Equation W-18 of thissubpart).New§98.236(m)(7)Total volume of emissions reported elsewhere, instandard cubic feet, during time periods in whichassociated gas was vented or flared and which arecalculated and reported under other paragraphs of thissection, in standard cubic feet (the sum of “EREp,q”values used in Equation W-18 of this subpart).New§98.236(m)(8) and(m)(8)(i)§98.236(c)(11)(i)(8) If you had associated gas emissions directly to theatmosphere without flaring, then you must report theinformation specified in paragraphs (m)(8)(i) through(m)(8)(iii) of this section for each sub-basin.(i) Total number of wells for which associated gas wasvented directly to the atmosphere without flaring.Number of wells venting orflaring associated natural gas ina calendar year.Current§98.236(m)(8)(ii)§98.236(c)(11)(iii)Annual CO2emissions, in metric tons CO2, calculatedaccording to § §98.233(m)(3) and (m)(4).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromassociated natural gas venting.Current47Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(m)(8)(iii)§98.236(c)(11)(iii)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(m)(3) and (m)(4).Report annual CO2and CH4emissions at the facility level,expressed in metric tons CO2efor each gas, emissions fromassociated natural gas venting.Current§98.236(m)(9) and(m)(9)(i)§98.236(c)(11)(i)(9) If you had associated gas emissions that wereflared, then you must report the information specifiedin paragraphs (m)(9)(i) through (m)(9)(iv) of thissection for each sub-basin.(i) Total number of wells for which associated gas wasflared.Number of wells venting orflaring associated natural gas ina calendar year.Current§98.236(m)(9)(ii)§98.236(c)(11)(iv)Annual CO2emissions, in metric tons CO2, calculatedaccording to § §98.233(m)(5).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom associated natural gasflaring.Current§98.236(m)(9)(iii)§98.236(c)(11)(iv)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(m)(5).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom associated natural gasflaring.Current§98.236(m)(9)(iv)§98.236(c)(11)(iv)Annual N2O emissions, in metric tons N2O, calculatedaccording to § §98.233(m)(5).Report annual CO2,CH4,andN2O emissions at the facilitylevel, expressed in metric tonsCO2e for each gas, emissionsfrom associated natural gasflaring.CurrentFlare Stacks§98.236(n)You must indicate if your facility contains any flarestacks.New48Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(n) and(n)(1)§98.236(c)(12)(x)(n)...You must report the information specified inparagraphs (n)(1) through (n)(13) of this section foreach flare stack at your facility, and for each industrysegment applicable to your facility.(1) Unique name or ID for the flare stack. For theonshore petroleum and natural gas production industrysegment, a different name or ID may be used for asingle flare stack for each location where it operates atin a given calendar year.For the natural gas processingindustry segment, a uniquename or ID number for the flarestack.Current§98.236(n)(2)§98.236(c)(12)(i)Indicate whether the flare stack has a continuous flowmeasurement device.Whether flare has a continuousflow monitor.Current§98.236(n)(3)§98.236(c)(12)(iv)Indicate whether the flare stack has a continuous gascomposition analyzer on feed gas to the flare.Whether flare has a continuousgas analyzer.Current§98.236(n)(4)§98.236(c)(12)(ii)Volume of gas sent to the flare in standard cubic feet(“Va” in Equation W-19 of this subpart).Volume of gas sent to flare incubic feet per year.Current§98.236(n)(5)§98.236(c)(12)(iii)Fraction of the feed gas sent to an un-lit flare (“Zu” inEquation W-19 of this subpart).Percent of gas sent to un-litflare determined by engineeringestimate and processknowledge based on bestavailable data and operatingrecords.Current§98.236(n)(6)§98.236(c)(12)(v)Flare combustion efficiency expressed as the fractionof gas combusted by a burning flare.Flare combustion efficiency.Current§98.236(n)(7)Mole fraction of CH4in the feed gas to the flare(“XCH4” in Equation W-19 of this subpart).New§98.236(n)(8)Mole fraction of CO2in the feed gas to the flare(“XCO2” in Equation W-20 of this subpart).New49Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(n)(9)§98.236(c)(12)(vii)and (viii)Annual CO2emissions, in metric tons CO2(refer toEquation W-20 of this subpart).(vii) Report uncombusted CO2emissions in metric tons CO2e(refer to Equation W-20 of§98.233)(viii) Report combusted CO2emissions, in metric tons CO2e(refer to Equation W-21 of§98.233).Current§98.236(n)(10)§98.236(c)(12)(vi)Annual CH4emissions, in metric tons CH4(refer toEquation W-19 of this subpart).Report uncombusted CH4emissions, in metric tons CO2e(refer to Equation W-19 of§98.233).Current§98.236(n)(11)§98.236(c)(12)(ix)Annual N2O emissions, in metric tons N2O (refer toEquation W-40 of this subpart).Report N2O emissions, inmetric tons CO2e.Current§98.236(n)(12)§98.236(c)(12)(xi)Indicate whether a CEMS was used to measureemissions from the flare. If a CEMS was used tomeasure emissions from the flare, then you are notrequired to report N2O and CH4emissions for the flarestack.In the case that a CEMS is usedto measure CO2emissions forthe flare stack, indicate that aCEMS was used in the annualreport and report the combustedCO2and uncombusted CO2as acombined number.CurrentCentrifugal Compressors§98.236(o)You must indicate whether your facility has centrifugalcompressors....New§98.236(o)(1) and(o)(1)(i)Report the information specified in paragraphs (o)(1)(i)through (o)(1)(xvi) of this section for each compressorlocated at your facility.(i) Unique name or ID for the centrifugal compressor.New§98.236(o)(1)(ii)§98.236(c)(13)(i)(F)Hours in operating-mode.Total time the compressor isoperating in hours.Current50Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(o)(1)(iii)§98.236(c)(13)(iii)(A)Hours in not-operating-depressurized-mode.Total time in hours thecompressor is in shutdown,depressurized mode.Current§98.236(o)(1)(iv)Indicate whether the compressor was measured inoperating-mode.New§98.236(o)(1)(v)Indicate whether the compressor was measured in notoperating-depressurized-mode.New§98.236(o)(1)(vi)Indicate whether any compressor sources are part of amanifolded group of compressor sources.New§98.236(o)(1)(vii)Indicate whether any compressor sources are routed toa flare.New§98.236(o)(1)(viii)Indicate whether any compressor sources have vaporrecovery.New§98.236(o)(1)(ix)Indicate whether emissions from any compressorsources are captured for fueluse or are routed to athermal oxidizer.New§98.236(o)(1)(x)Indicate whether the compressor has blind flangesinstalled.New§98.236(o)(1)(xi)Indicate whether the compressor has wet or dry seals.New§98.236(o)(1)(xii)§98.236(c)(13)(i)(A)If the compressor has wet seals, the number of wetseals.Number of wet seals connectedto the degassing vent.Current§98.236(o)(1)(xiii)Compressor power rating (hp).New§98.236(o)(1)(xiv)Year compressor was installed.New§98.236(o)(1)(xv)Compressor model name and description.New§98.236(o)(1)(xvi)Date of last maintenance shutdown that compressorwas depressurized.New51Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(o)(2) and(o)(2)(i)(2) For each compressor source at each compressor,report the information specified in paragraphs (o)(2)(i)through (o)(2)(viii) of this section.(i) Centrifugal compressor name or ID. Use the sameID as in paragraph (o)(1)(i) of this section.New§98.236(o)(2)(ii)Centrifugal compressor source (wet seal, isolationvalve, or blowdown valve).New§98.236(o)(2)(iii)Unique name or ID for the emission vent. If theemission vent is connected a manifolded group ofcompressor sources, use the same emission vent ID foreach compressor source.New§98.236(o)(2)(iv)Indicate whether the emission vent is for a singlecompressor source or manifolded group of compressorsources and whether the emissions from the emissionvent are released to the atmosphere, routed to a flare,combustion (fuel or thermal oxidizer), or vaporrecovery.New§98.236(o)(2)(v)Indicate whether an as foundleak measurement(s) asidentified in § §98.233(o)(2) or (o)(4) was conductedon the emission vent.New§98.236(o)(2)(vi)Indicate whether continuousleak measurements asidentified in § §98.233(o)(3) or (o)(5) were conductedon the emission vent.New§98.236(o)(2)(vii)and (o)(2)(vii)(A)§98.236(c)(13)(iv)Report emissions as specified in paragraphs(o)(2)(vii)(A) and (o)(2)(vii)(B) of this section for theemission vent. For emission vents associated withindividual compressor sources that use an as found leakmeasurement(s), calculateemissions by summing allemissions from all compressor mode-sourcecombinations for the emission vent.(A) Annual CO2emissions, in metric tons CO2.Report total annual compressoremissions from all modes ofoperation in metric tons ofCO2e for each gas.Current52Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(o)(2)(vii)(B)§98.236(c)(13)(iv)Annual CH4emissions, in metric tons CH4.Report total annual compressoremissions from all modes ofoperation in metric tons ofCO2e for each gas.Current§98.236(o)(2)(viii)If the emission vent is routed to flare, combustion, orvapor recovery, report the percentage of time that therespective device was operational.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...(i) For each as found leak measurement performed onan emission vent, report the information specified inparagraphs (o)(3)(i)(A) through (o)(3)(i)(E) of thissection.(A) Name or ID of emission vent. Use same emissionvent ID as in paragraph (o)(2)(iii) of this section.New§98.236(o)(3)(i)(B)Sample date.New§98.236(o)(3)(i)(C)Leak measurement method.New§98.236(o)(3)(i)(D)Measured flow rate, in standard cubic feet per hour.New§98.236(o)(3)(i)(E)For each compressor attached to the emission vent,report the mode of operation the compressor was inwhen the sample was taken.New§98.236(o)(3)(ii)and (o)(3)(ii)(A)(ii) For each compressormode-source combinationwhere a reporter emission factor as calculated inequation W-24 was used to calculate emissions inEquation W-23, report the information specified inparagraphs (o)(3)(ii)(A) through (o)(3)(ii)(D) of thissection.(A) The compressor mode-source combination.New53Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(o)(3)(ii)(B)§98.236(c)(13)(iii)(B)The compressor mode-source combination reporteremission factor, in standard cubic feet per hour (EFm,sin Equation W-24).(B) Reporter emission factorfor isolation valve emissions inshutdown, depressurized modein cubic feet per hour (refer toEquation W-24 of §98.233).Revised§98.236(o)(3)(ii)(C)The total number of compressors measured in thecompressor mode-source combination in the currentreporting year and the preceding two reporting years(Countmin Equation W-24).New§98.236(o)(3)(ii)(D)Indicate whether the compressor mode-sourcecombination reporter emissionfactor is facility-specificor corporate.New§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 theinformation specified in paragraphs (o)(4)(i) and(o)(4)(ii) of this section for each continuousmeasurement conducted on each emission ventassociated with each compressor source or manifoldedgroup of compressor sources.(i) Name or ID of emission vent. Use same Vent ID asin paragraph (o)(2)(iii) of this section.New§98.236(o)(4)(ii)Measured volume of flow during the reporting year, inmillion standard cubic feet.New§98.236(o)(5) and(o)(5)(i)§98.236(c)(13)(v)(A)(5) Centrifugal compressors with wet seal degassingvents in onshore petroleum and natural gas productionmust report the information specified in paragraphs(o)(5)(i) through (o)(5)(iii) of this section.(i) Number of centrifugal compressors that have wetseal oil degassing vents.Count of compressors.Revised54Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(o)(5)(ii)§98.236(c)(13)(v)(B)Annual CO2emissions, in metric tons CO2, fromcentrifugal compressors with wet seal oil degassingvents.Report annual emissions inmetric tons of CO2e for eachgas (refer to Equation W-25 of§98.233) collectively.Current§98.236(o)(5)(iii)§98.236(c)(13)(v)(B)Annual CH4emissions, in metric tons CH4, fromcentrifugal compressors with wet seal oil degassingvents.Report annual emissions inmetric tons of CO2e for eachgas (refer to Equation W-25 of§98.233) collectively.CurrentReciprocating Compressors§98.236(p)You must indicate whether your facility hasreciprocating compressors.New§98.236(p)(1) and(p)(1)(i)(1) Report the information specified in paragraphs(p)(1)(i) through (p)(1)(xvi) of this section for eachcompressor located at your facility.(i) Unique name or ID for the reciprocatingcompressor.New§98.236(p)(1)(ii)§98.236(c)(14)(i)(B)Hours in operating-mode.Total time in hours thereciprocating compressor is inoperating mode.Current§98.236(p)(1)(iii)§98.236(c)(14)(ii)(A)Hours in standby-depressurized-mode.Total time in hours thecompressor is in standby,pressurized mode.Current§98.236(p)(1)(iv)§98.236(c)(14)(iii)(A)Hours in not-operating-depressurized-mode.Total time the compressor is innot operating, depressurizedmode.Current§98.236(p)(1)(v)Indicate whether the compressor was measured inoperating-mode.New§98.236(p)(1)(vi)Indicate whether the compressor was measured instandby-depressurized-mode.New§98.236(p)(1)(vii)Indicate whether the compressor was measured in notoperating-depressurized-mode.New55Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(p)(1)(viii)Indicate whether any compressor sources are part of amanifolded group of compressor sources.New§98.236(p)(1)(ix)Indicate whether any compressor sources are routed toa flare.New§98.236(p)(1)(x)Indicate whether any compressor sources have vaporrecovery.New§98.236(p)(1)(xi)Indicate whether emissions from any compressorsources are captured for fueluse or are routed to athermal oxidizer.New§98.236(p)(1)(xii)Indicate whether the compressor has blind flangesinstalled.New§98.236(p)(1)(xiii)Compressor power rating (hp).New§98.236(p)(1)(xiv)Year compressor was installed.New§98.236(p)(1)(xv)Compressor model name and description.New§98.236(p)(1)(xvi)Date of last maintenance shutdown for rod packingreplacement.New§98.236(p)(2) and(p)(2)(i)(2) For each compressor source at each compressor,report the information specified in paragraphs (p)(2)(i)through (p)(2)(viii) of this section.(i) Reciprocating compressor name or ID. Use the sameID as in paragraph (p)(1)(i) of this section.New§98.236(p)(2)(ii)Reciprocating compressor source (isolation valve,blowdown valve, or rod packing).New§98.236(p)(2)(iii)Unique name or ID for the emission vent. If theemission vent is connected to a manifolded group ofcompressor sources, use the same emission vent ID foreach compressor source.New56Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(p)(2)(iv)Indicate whether the emission vent is for a singlecompressor source or manifolded group of compressorsources and whether the emissions from the emissionvent are released to the atmosphere, routed to a flare,combustion (fuel or thermal oxidizer), or vaporrecovery.New§98.236(p)(2)(v)Indicate whether an as foundleak measurement(s) asidentified in § §98.233(p)(2) or (p)(4) was conductedon the emission vent.New§98.236(p)(2)(vi)Indicate whether continuousleak measurements asidentified in § §98.233(p)(3) or (p)(5) were conductedon the emission vent.New§98.236(p)(2)(vii)and (p)(2)(vii)(A)§98.236(c)(14)(iv)(vii) Report emissions as specified in paragraphs(p)(2)(vii)(A) through (p)(2)(vii)(B) of this section forthe emission vent. For emission vents associated withindividual compressor sources that use an as found leakmeasurement(s), calculateemissions by summing allemissions from all compressor mode-sourcecombinations for the emission vent.(A) Annual CO2emissions, in metric tons CO2.Report total annual compressoremissions from all modes ofoperation in metric tons ofCO2e for each gas.Current§98.236(p)(2)(vii)(B)§98.236(c)(14)(iv) Annual CH4emissions, in metric tons CH4.Report total annual compressoremissions from all modes ofoperation in metric tons ofCO2e for each gas.Revised§98.236(p)(2)(viii)If the emission vent is routed to flare, combustion, orvapor recovery, report the percentage of time that therespective device was operational.New57Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§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 theinformation specified in paragraphs (p)(3)(i) of thissection. If the measurement method specified inparagraph §98.233(p)(2) is performed, report theinformation specified in paragraph (p)(3)(ii) of thissection.(i) For each as found leak measurement performed onan emission vent, report the information specified inparagraphs (p)(3)(i)(A) through (p)(3)(i)(E) of thissection.(A) Name or ID of emission vent. Use the sameemission vent ID as in paragraph (p)(2)(iii) of thissection.New§98.236(p)(3)(i)(B)Sample date.New§98.236(p)(3)(i)(C)Leak measurement method.New§98.236(p)(3)(i)(D)Measured flow rate, in standard cubic feet per hour.New§98.236(p)(3)(i)(E)For each compressor attached to the emission vent,report the mode of operation the compressor was inwhen the sample was taken.New§98.236(p)(3)(ii)and (p)(3)(ii)(A)(ii) For each compressormode-source combinationwhere a reporter emission factor as calculated inequation W-28 was used to calculate emissions inEquation W-27, report the information specified inparagraphs (p)(3)(ii)(A) through (p)(3)(ii)(D) of thissection.(A) compressor mode-source combination.New§98.236(p)(3)(ii)(B)§98.236(c)(14)(iii)(B)The compressor mode-source combination reporteremission factor, in standard cubic feet per hour (EFm,sin Equation W-28).Reporter emission factor forisolation valve emissions in notoperating, depressurized modein cubic feet per hour (refer toEquation W-28 of §98.233).Revised58Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(p)(3)(ii)(C)The total number of compressors measured in thecompressor mode-source combination in the currentreporting year and the preceding two reporting years(Countmin Equation W-28).New§98.236(p)(3)(ii)(D)Indicate whether the compressor mode-sourcecombination reporter emissionfactor is facility-specificor corporate.New§98.236(p)(4) and(p)(4)(i)If the measurement methods specified in paragraphs §§98.233(p)(3) or (p)(5) are conducted, report theinformation specified in paragraphs (p)(4)(i) and(p)(4)(ii) of this section for each continuousmeasurement conducted on each emission ventassociated with each compressor source or manifoldedgroup of compressor sources.(i) Name or ID of emission vent. Use same emissionvent ID as in paragraph (p)(2)(iii) of this section.New§98.236(p)(4)(ii)Measured volume of flow during the reporting year, inmillion standard cubic feet.new§98.236(p)(5) and(p)(5)(i)§98.236(c)(14)(v)(A)(5) Reciprocating compressors in onshore petroleumand natural gas production must report the informationspecified in paragraphs (p)(5)(i) through (p)(5)(iii) ofthis section.(i) Number of reciprocating compressors.Count of compressors.Current§98.236(p)(5)(ii)§98.236(c)(14)(v)(B)Annual CO2emissions, in metric tons CO2, fromreciprocating compressors.Report annual emissions inmetric tons of CO2e for eachgas collectively (refer toEquation W-29 of §98.233).Current§98.236(p)(5)(iii)§98.236(c)(14)(v)(B)Annual CH4emissions, in metric tons CH4, fromreciprocating compressors.Report annual emissions inmetric tons of CO2e for eachgas collectively (refer toEquation W-29 of §98.233).Current59Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementEquipment Leaks Surveys§98.236(q), (q)(1),and (q)(1)(i)If your facility is subject to the requirements of§98.233(q), then you must report the informationspecified in paragraphs (q)(1)and (q)(2) of this section.Natural gas distribution facilities must also report theinformation specified in paragraph (q)(3) of thissection.(1) You must report the information specified inparagraphs (q)(1)(i) and (ii) of this section.(i) The number of complete equipment leak surveysperformed during the calendar year.New§98.236(q)(1)(ii)§98.236(c)(16)(ii)Natural gas distribution facilities performingequipment leak surveys across a multiple year leaksurvey cycle must report the number of years in theleak survey cycle.Number of years over which allT-D transfer stations will bemonitored at least once.Revised§98.236(q)(2) and(q)(2)(i)(2) You must indicate whether your facility containsany of the component types listed in § §98.233(d)(7),(e)(7), (f)(5), (g)(3), (h)(4), or (i)(1), for your facility’sindustry segment. For each component type that islocated at your facility, you must report the informationspecified in paragraphs (q)(2)(i) through (q)(2)(iv) ofthis section. If a component type is located at yourfacility, and no leaks were identified from thatcomponent, then you must report the information inparagraphs (q)(2)(i) through (q)(2)(v) of this sectionbut report a zero (“0”0 for the information requiredaccording to paragraphs (q)(2)(iii), (q)(2)(iv), and(q)(2)(v) of this section.(i) Component type.New60Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(q)(2)(ii)§98.236(c)(15)(i)(A)Total number of the survey component type that wereidentified as leaking in the calendar year (“xp” inEquation W-30 of this subpart for the component type).Total count of leaks found ineach complete survey listed bydate of survey and eachcomponent type for which thereis a leaker emission factor inTables W-2, W-3, W-4, W-5,W-6, and W-7 of this subpart.Current§98.236(q)(2)(iii)Average time the surveyed components were foundleaking and operational, in hours (average of Tp,zfromEquation W-30 of this subpart for the component type).New§98.236(q)(2)(iv)§98.236(c)(15)(i)(C)Annual CO2emissions, in metric tons CO2, for thecomponent type.Annual CO2and CH4emissionsin metric tons CO2e for eachgas (refer to Equation W-30Aof §98.233), by component typeCurrent§98.236(q)(2)(v)§98.236(c)(15)(i)(C)Annual CH4emissions, in metric tons CH4, for thecomponent type.Annual CO2and CH4emissionsin metric tons CO2e for eachgas (refer to Equation W-30Aof §98.233), by component typeCurrent§98.236(q)(3) and(q)(3)(i)§98.236(c)(16)(iii)(3) Natural gas distribution facilities must report theinformation specified in paragraphs (q)(3)(i) through(q)(3)(viii) of this subpart.(i) Number of above grade transmission-distributiontransfer stations surveyed in the calendar year.Number of T-D stationsmonitored in calendar year.Current§98.236(q)(3)(ii)Number of meter/regulator runs at above gradetransmission-distribution transfer stations surveyed inthe calendar year (CountMR,yfrom Equation W-31 ofthis subpart, for the current calendar year).New§98.236(q)(3)(iii)Average time that meter/regulator runs surveyed in thecalendar year were operational, in hours (average ofTw,yfrom Equation W-31 of this subpart, for thecurrent calendar year).New61Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(q)(3)(iv)§98.236(c)(16)(ii)Number of above grade transmission-distributiontransfer stations surveyedin the current leak surveycycle.(iii) Number of T-D stationsmonitored in calendar year.Current§98.236(q)(3)(v)Number of meter/regulator runs at above gradetransmission-distribution transfer stations surveyed incurrent leak surveycycle (sum of CountMR,yfromEquation W-31 of this subpart, for all calendar years inthe current leak survey cycle).New§98.236(q)(3)(vi)Average time that meter/regulator runs surveyed in thecurrent leak survey cycle were operational, in hours(average of Tw,yfrom Equation W-31of this subpart, forall years included in the leak survey cycle).New§98.236(q)(3)(vii)§98.236(c)(16)(viii)Meter/regulator run CO2emission factor based on allsurveyed transmission-distribution transfer stations inthe current leak survey cycle,in standard cubic feet ofCO2per meter/regulator run operating hour(“EFs,MR,CO2” calculated using Equation W-31 of thissubpart).Leak factor for meter/regulatorrun developed in Equation W32 of §98.233.Current§98.236(q)(3)(viii)§98.236(c)(16)(viii)Meter/regulator run CH4emission factor based on allsurveyed transmission-distribution transfer stations inthe current leak survey cycle,in standard cubic feet ofCH4per meter/regulator run operating hour(“EFs,MR,CH4” calculated using Equation W-31 of thissubpart).Leak factor for meter/regulatorrun developed in Equation W32 of §98.233.Current62Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementEquipment 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 informationspecified in paragraph (r)(1) of this section. Natural gasdistribution facilities must also report the informationspecified in paragraph (r)(2) of this section. Onshorepetroleum and natural gas production facilities mustalso report the information specified in paragraph (r)(3)of this section.(1) You must indicate whether your facility containsany of the emission source types covered by §§98.233(r), for the applicable industry segment. Youmust report the information specified in paragraphs(r)(1)(i) through (r)(1)(v) of this section separately foreach emission source type that is located at yourfacility. Onshore petroleum and natural gas productionfacilities must report the information specified inparagraphs (r)(1)(i) through (r)(1)(v) of this sectionseparately by component type, service type, andgeographic location (i.e., Eastern U.S or Western U.S.).New§98.236(r)(1)(i)Emission source type. Onshore petroleum and naturalgas production facilities must report the componenttype, service type and geographic location.New§98.236(r)(1)(ii)§98.236(c)(15)(ii)(A)Total number of the emission source type at the facility(“Counte” in Equation W-32A of this subpart).Total count for each componenttype in Tables W-4, W-5, andW-6 of this subpart for whichthere is a population emissionfactor, listed by major headingand component type.Current§98.236(r)(1)(iii)Average estimated time that the emission source typewas operation in the calendar year, in hours (“Te” inEquation W-32A of this subpart).New63Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(r)(1)(iv)§98.236(c)(15)(ii)(C)Annual CO2emissions, in metric tons CO2, for theemission source type.Annual CO2and CH4emissions, in metric tons CO2efor each gas (refer to EquationW-31 of §98.233), bycomponent type.Current§98.236(r)(1)(v)§98.236(c)(15)(ii)(C)Annual CH4emissions, in metric tons CH4, for theemission source type.Annual CO2and CH4emissions, in metric tons CO2efor each gas (refer to EquationW-31 of §98.233), bycomponent type.Current§98.236(r)(2) and(r)(2)(i)§98.236(c)(16)(i)(2) Natural gas distribution facilities must also reportthe information specified in paragraphs (q)(2)(i)through (q)(2)(viii) of this subpart.(i) Number of above grade transmission-distributiontransfer stations at the facility.Total number of above grade TD transfer stations in thefacility.Current§98.236(r)(2)(ii)§98.236(c)(16)(v)Number of above grade metering-regulating stationsthat are not transmission-distribution transfer stationsat the facility.Total number of above grademetering-regulating stations(this count will include abovegrade T-D transfer stations) inthe facility.Current§98.236(r)(2)(iii)§98.236(c)(16)(iv)Number of below grade transmission-distributiontransfer stations at the facility.Total number of below grade TD transfer stations in thefacility.Current§98.236(r)(2)(iv)§98.236(c)(16)(vi)Number of below grade metering-regulating stationsthat are not transmission-distribution transfer stationsat the facility.Total number of below grademetering-regulating stations(this count will include belowgrade T-D transfer stations) inthe facility.Current§98.236(r)(2)(v)Total number of meter/regulator runs at above grademetering-regulating stations that are not above gradetransmission-distribution transfer stations (“CountMR”in Equation W-32B of this subpart).New64Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(r)(2)(vi)Average estimated time that each meter/regulator runwas operational in the calendar year, in hours permeter/regulator run (“Tw,avg” in Equation W-32B of thissubpart).New§98.236(r)(2)(vii)Annual CO2emissions, in metric tons CO2, from abovegrade metering regulating stations that are not abovegrade transmission-distribution transfer stations.New§98.236(r)(2)(viii)Annual CH4emissions, in metric tons CH4, from abovegrade metering regulating stations that are not abovegrade transmission-distribution transfer stations.New§98.236(r)(3) and(r)(3)(i)(3) Onshore petroleum and natural gas productionfacilities must also report the information specified inparagraphs (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 productionfacilities must report the information specified inparagraphs (r)(3)(ii)(A) and (r)(3)(ii) of this section, foreach major equipment type, production type (i.e.natural gas or crude oil), and geographic locationcombination in Tables W-1B and W-1C of this subpart.(A) An indication of whether the facility contains themajor equipment type.New§98.236(r)(3)(ii)(B)§98.236(c)(15)(ii)(B)If the facility does contain the equipment type, thecount of the major equipment type.Total count for each type ofmajor equipment in Table W1B and Table W-1C of thissubpart, by facility.Current65Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementOffshore Petroleum and Natural Gas Production§98.236(s)(1),(s)(2), and (s)(3)§98.236(b)(s) You must report the information specified inparagraphs (s)(1) through (s)(3) of this section for eachemission source type listed in the most recentBOEMRE study.(1) Annual CO2emissions, in metric tons CO2.(2) Annual CH4emissions, in metric tons CH4.(3) Annual N2O emissions, in metric tons N2O.Report emissions of CH4, CO2and N2O as applicable to thesource type (in metric tonsCO2e per year at standardconditions) individually for allof the emissions source typeslisted in the most recentBOEMRE study.CurrentEOR Injection Pumps§98.236(w)You must indicate whether CO2EOR injection wasused at your facility during the calendar year, and ifany EOR injection pump blowdowns occurred duringthe year. If EOR injection pump blowdowns occurredduring the calendar year, then you must report theinformation specified in paragraphs (w)(1) through(w)(8) of this section for each EOR injection pumpsystem.New§98.236(w)(1)Sub-basin ID.New§98.236(w)(2)EOR injection pump system identifier.New§98.236(w)(3)§98.236(c)(17)(i)Pump capacity, in barrels per day.Pump capacity, in barrels perdayCurrent§98.236(w)(4)§98.236(c)(17)(ii)Total volume of EOR injection pump systemequipment chambers, in cubic feet(“Vv” in EquationW-37 of this subpart).Volume of critical phase gasbetween isolation valves.Revised§98.236(w)(5)§98.236(c)(17)(iii)Number of blowdowns for the EOR injection pumpsystem in the calendar year.Number of blowdowns peryear.Current§98.236(w)(6)§98.236(c)(17)(iv)Density of critical phase EOR injection gas, inkilograms per cubic foot(“Rc” in Equation W-37 ofthis subpart)Critical phase EOR injectiongas density.Current66Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(w)(7)Mass fraction of CO2in critical phase EOR injectiongas (“GHGCO2” in Equation W-37 of this subpart).New§98.236(w)(8)§98.236(c)(17)(v)Annual CO2emissions, in metric tons CO2, from EORinjection pump system blowdowns.For each EOR pump, reportannual CO2 emissions,expressed in metric tons CO2efor each gas.CurrentEOR Hydrocarbon Liquids§98.236(x)You must indicate whether hydrocarbon liquids wereproduced through EOR operations....New§98.236(x) and(x)(1)(x)...If hydrocarbon liquids were produced throughEOR operations, you must report the informationspecified in paragraphs (x)(1) through (x)(4) of thissection for each sub-basin category with EORoperations.(1) Sub-basin ID.New§98.236(x)(2)§98.236(c)(18)(i)Total volume of hydrocarbon liquids produced throughEOR operations in the calendar year, in barrels (“Vhl”in Equation W-38 of this subpart).Volume of crude oil producedin barrels per year.Current§98.236(x)(3)§98.236(c)(18)(ii)Average CO2retained in hydrocarbon liquidsdownstream of the storage tank, in metric tons perbarrel under standard conditions (“Shl” in Equation W38 of this subpart).Amount of CO2retained inhydrocarbon liquids in metrictons per barrel, under standardconditions.Current§98.236(x)(4)§98.236(c)(18)(iii)Annual CO2emissions, in metric tons CO2, from CO2retained in hydrocarbon liquids produced through EORoperations downstream of the storage tank (“MassCO2”in Equation W-38 of this subpart).Report annual CO2emissions atthe sub-basin level , expressedin metric tons CO2e.Current67Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementCombustion Equipment for Onshore Petroleum and NaturalGas Production and Natural Gas Distribution Facilities§98.236(z)If your facility is required by§98.232(c)(22) or (i)(7)to report emissions from combustion equipment, thenyou must indicate whether your facility has anycombustion units subject to reporting according toparagraphs (a)(1)(xvii) or (a)(8)(iii) of this section....New§98.236(z) and(z)(1)(z) ...If your facility contains any combustion unitssubject to reporting according to paragraphs(a)(1)(xvii) or (a)(8)(iii) of this section, then you mustreport 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 heatcapacity less than or equal to 5 million Btu per hour;or, internal fuel combustion units that are notcompressor-drivers, with a rated heat capacity less thanor equal to 1 mmBtu per hour (or the equivalent of 130horsepower)....New§98.236(z)(1) and(z)(1)(i)(1)...If the facility contains external fuel combustionunits with a rated heat capacity less than or equal to 5million Btu per hour or internal fuel combustion unitsthat are not compressor-drivers, with a rated heatcapacity less than or equal to 1 million Btu per hour (orthe equivalent of 130 horsepower), then you mustreport the information specified in paragraphs (z)(1)(i)and (z)(1)(ii) of thissection for each unit type.(i) The type of combustion unit.New68Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(z)(1)(ii)§98.236(c)(19)(i)and (ii)The total number of combustion units.(i) Cumulative number ofexternal fuel combustion unitswith a rated heat capacity equalto or less than 5 mmBtu/hr, bytype of unit.(ii) Cumulative number ofexternal fuel combustion unitswith a rated heat capacity largerthan 5 mmBtu/hr, by type ofunit.Revised§98.236(z)(2)Indicate whether the combustion units include: externalfuel combustion units with arated heat capacity greaterthan 5 million Btu per hour; internal fuel combustionunits that are not compressor-drivers, with a rated heatcapacity greater than 1 million Btu per hour (or theequivalent of 130 horsepower); or, internal fuelcombustion units of anyheat capacity that arecompressor-drivers.New§98.236(z)(2) and(z)(2)(i)§98.236(c )(19)(i)and (ii)(2)...If your facility contains: external fuel combustionunits with a rated heat capacity greater than 5mmBtu/hr; internal fuel combustion units that are notcompressor-drivers, with a rated heat capacity greaterthan to 1 million Btu per hour (or the equivalent of 130horsepower); or internal fuel combustion units of anyheat capacity that are compressor-drivers, then youmust report the information specified in paragraphs(z)(2)(i) through (z)(2)(vi) for each combustion unittype and fuel type combination.(i) The type of combustion unit.(i) Cumulative number ofexternal fuel combustion unitswith a rated heat capacity equalto or less than 5 mmBtu/hr, bytype of unit.(ii) Cumulative number ofexternal fuel combustion unitswith a rated heat capacity largerthan 5 mmBtu/hr, by type ofunit.Revised§98.236(z)(2)(ii)The type of fuel combusted.New69Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(z)(2)(iii)§98.236(c )(19)(iv)and (c)(19)(vii)The quantity of fuel combusted in the calendar year, inthousand standard cubic feet, gallons, or tons.(iv) Cumulative volume of fuelcombusted in external fuelcombustion units with a ratedheat capacity larger than 5mmBtu/hr, by fuel type.(vii) Cumulative volume of fuelcombusted in internalcombustion units with a ratedheat capacity larger than 1mmBtu/hr or 130 horsepower,by fuel type.Current§98.236(z)(2)(iv)§98.236(c )(19)(iii)and (c)(19)(vi)Annual CO2emissions, in metric tons CO2, calculatedaccording to § §98.233(z)(1) and (z)(2).(iii) Report annual CO2, CH4,and N2O emissions fromexternal fuel combustion unitswith a rated heat capacity largerthan 5 mmBtu/hr, expressed inmetric tons CO2e for each gas,by type of unit.(vi) Report annual CO2, CH4,and N2O emissions frominternal combustion unitsgreater than 1mmBtu/hr,expressed in metric tons CO2efor each gas, by type of unit.Current70Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(z)(2)(v)§98.236(c )(19)(iii)and (c)(19)(vi)Annual CH4emissions, in metric tons CH4, calculatedaccording to § §98.233(z)(1) and (z)(2).(iii) Report annual CO2, CH4,and N2O emissions fromexternal fuel combustion unitswith a rated heat capacity largerthan 5 mmBtu/hr, expressed inmetric tons CO2e for each gas,by type of unit.(vi) Report annual CO2, CH4,and N2O emissions frominternal combustion unitsgreater than 1mmBtu/hr,expressed in metric tons CO2efor each gas, by type of unit.Current§98.236(z)(2)(vi)§98.236(c )(19)(iii)and (c)(19)(vi)Annual N2O emissions, in metric tons N2O, calculatedaccording to § §98.233(z)(1) and (z)(2).(iii) Report annual CO2, CH4,and N2O emissions fromexternal fuel combustion unitswith a rated heat capacity largerthan 5 mmBtu/hr, expressed inmetric tons CO2e for each gas,by type of unit.(vi) Report annual CO2, CH4,and N2O emissions frominternal combustion unitsgreater than 1mmBtu/hr,expressed in metric tons CO2efor each gas, by type of unit.Current71Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirementMiscellaneous§98.236(aa), (aa)(1),(aa)(1)(i), and(aa)(1)(i)(A)(aa) Each facility must report the information specifiedin paragraphs (aa)(1) through (aa)(9) of this section, foreach applicable industrysegment, by using bestavailable data. If a quantity required to be reported iszero, 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)(D) of this section forthe basin as a whole.(A) The quantity of gas produced in the calendar yearfrom wells in thousand standard cubic feet. Thisincludes gas that is routed to a pipeline, vented orflared, or used in fieldoperations. This does notinclude gas injected back into reservoirs or shrinkageresulting from lease condensate production.New§98.236(aa)(1)(i)(B)The quantity of gas produced in the calendar year forsales, in thousand standard cubic feet.New§98.236(aa)(1)(i)(C)The quantity of crude oil produced in the calendar yearfor sales, not including lease condensates, in barrels.New§98.236(aa)(1)(i)(D)The quantity of lease condensate produced in thecalendar 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 foreach unique sub-basin category.(A) State.New§98.236(aa)(1)(ii)(B)County.New72Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(aa)(1)(ii)(C)Formation type.New§98.236(aa)(1)(ii)(D)The number of producing wells at the end of thecalendar yearNew§98.236(aa)(1)(ii)(E)The number of producing wells acquired during thecalendar yearNew§98.236(aa)(1)(ii)(F)The number of producing wells divested during thecalendar year.New§98.236(aa)(1)(ii)(G)The number of wells completed during the calendaryear.New§98.236(aa)(1)(ii)(H)The number of wells taken out of production during thecalendar year.New§98.236(aa)(1)(ii)(I)Average mole fraction of CH4in produced gas.New§98.236(aa)(1)(ii)(J)Average mole fraction of CO2in produced gasNew§98.236(aa)(1)(ii)(K)§98.236(e)If an oil sub-basin, report the average GOR of all wells,in thousand standard cubic feet per barrel.For onshore petroleum andnatural gas production, report . .. best available estimate of gasto oil ratio, ...for each oil subbasin category.Current§98.236(aa)(1)(ii)(L)§98.236(e)If an oil sub-basin, report the average API gravity of allwells.For onshore petroleum andnatural gas production, reportthe best available estimate ofAPI gravity, . . .for each oilsub-basin category.Current§98.236(aa)(1)(ii)(M)§98.236(e)If an oil sub-basin, report average low pressureseparator pressure, in pounds per square inch gauge.For onshore petroleum andnatural gas production, reportthe . . .best available estimate ofaverage low pressure separatorpressure for each oil sub-basincategory.Current73Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(aa)(2) and(aa)(2)(i)(2) For offshore production, report the quantitiesspecified in paragraphs (aa)(2)(i) through (aa)(2)(iii) ofthis section.(i) The quantity of gas produced from the offshoreplatform in the calendar year for sales, in thousandstandard cubic feet.New§98.236(aa)(2)(ii)The quantity of oil produced from the offshoreplatform in the calendar year for sales, in barrels.New§98.236(aa)(2)(iii)The quantity of condensate produced from the offshoreplatform in the calendar year for sales, in barrels.New§98.236(aa)(3) and(aa)(3)(i)(3) For natural gas processing, report the quantitiesspecified in paragraphs (aa)(3)(i) through (aa)(3)(vii)of this section.(i) The quantity of producedgas received at the gasprocessing plant in the calendar year, in thousandstandard cubic feet.New§98.236(aa)(3)(ii)The quantity of processed (residue) gas leaving the gasprocessing plant in the calendar year, in thousandstandard cubic feet.New§98.236(aa)(3)(iii)The quantity of NGLs (bulkand fractionated) receivedat the gas processing plant in the calendar year, inbarrels.New§98.236(aa)(3)(iv)The quantity of NGLs (bulk and fractionated) leavingthe gas processing plant in the reporting year (barrels).New§98.236(aa)(3)(v)Average mole fraction of CH4 in produced gasreceived.New§98.236(aa)(3)(vi)Average mole fraction of CO2 in produced gasreceived.New§98.236(aa)(3)(vii)Indicate whether the facility fractionates NGLs.New74Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(aa)(4) and(aa)(4)(i)(4) For natural gas transmission compression, reportthe quantity specified in paragraphs (aa)(4)(i) through(aa)(4)(v) of this section.(i) The quantity of gas transported through thecompressor station in thecalendar year,in thousandstandard cubic feet.New§98.236(aa)(4)(ii)Number of compressors.New§98.236(aa)(4)(iii)Total compressor power rating of all compressorscombined, in horsepower.New§98.236(aa)(4)(iv)Average upstream pipeline pressure, in pounds persquare inch gauge.New§98.236(aa)(4)(v)Average downstream pipeline pressure, in pounds persquare inch gauge.New§98.236(aa)(5) and(aa)(5)(i)(5) For underground natural gas storage, report thequantities specified in paragraphs (aa)(5)(i) through(aa)(5)(iii) of this section.(i) The quantity of gas injected into storage in thecalendar year, in thousandstandard cubic feet.New§98.236(aa)(5)(ii)The quantity of gas withdrawn from storage in thecalendar year, in thousandstandard cubic feet.New§98.236(aa)(5)(iii)Total storage capacity, in thousand standard cubic feet.New§98.236(aa)(6)For LNG import equipment, report the quantity ofLNG imported in the calendar year, in thousandstandard cubic feet.New§98.236(aa)(7)For LNG export equipment, report the quantity of LNGexported in the calendar year, in thousand standardcubic feet.New75Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(aa)(8) and(aa)(8)(i)(8) For LNG storage, report the quantities specified inparagraphs (aa)(8)(i) through(aa)(8)(iii) of this section.(i) The quantity of LNG added into storage in thecalendar year, in thousandstandard cubic feet.New§98.236(aa)(8)(ii)The quantity of LNG withdrawn from storage in thecalendar year, in thousandstandard cubic feet.New§98.236(aa)(8)(iii)Total storage capacity, in thousand standard cubic feet.New§98.236(aa)(9) and(aa)(9)(i)(9) For natural gas distribution, report the quantitiesspecified in paragraphs (aa)(9)(i) through (aa)(9)(vii)of this section.(i) The quantity of natural gas received at all custodytransfer stations in thecalendar year, in thousandstandard cubic feet. This value may include metercorrections, but only for the calendar year covered bythe annual report.New§98.236(aa)(9)(ii)The quantity of natural gas withdrawn from in-systemstorage in the calendar year, in thousand standard cubicfeet.New§98.236(aa)(9)(iii)The quantity of natural gas added to in-system storagein the calendar year, in thousand standard cubic feet.New§98.236(aa)(9)(iv)The quantity of natural gas delivered to end users, inthousand standard cubic feet. This value does notinclude stolen gas, or gas that is otherwise unaccountedfor.New§98.236(aa)(9)(v)The quantity of natural gas transferred to third partiessuch as other LDCs or pipelines, in thousand standardcubic feet. This value does not include stolen gas, orgas that is otherwise unaccounted for.New§98.236(aa)(9)(vi)The quantity of natural gas consumed by the LDC foroperational purposes, in thousand standard cubic feet.New76Table 1. Proposed Changes to the Subpart W Reporting RequirementsProposed CitationReferenceCurrent CitationReferenceProposed Rule TextCurrent Rule TextNew, Revised, orCurrentRequirement§98.236(aa)(9)(vii)The estimated quantity of gas stolen in the calendaryear, in thousand standard cubic feet.NewMissing Data Provisions§98.236(bb), and(bb)(1)(bb) For any missing data procedures used, report theinformation in paragraphs (1) through (5) in thissection for each individual missing data value used in acalculation. Aggregation of missing data values withina component, well, sub-basin, or basin is notacceptable. If missing data is substituted for the sameparameter in non-consecutive periods during thecalendar year, the information in paragraphs (1)through (5) in this section should be reported for eachperiod separately.(1) The date(s) the missing data is used.New§98.236(bb)(2)The equation(s) in which the missing data is usedNew§98.236(bb)(3)The description of the unique or unusual circumstancethat led to missing data use, including information onany equipment or components involved and anyprocedures that were not followed.New§98.236(bb)(4)The description of the procedures used to substitute anunavailable value of a parameter.New§98.236(bb)(5)The description of how the owner or operator willavoid the use of missing data in the future, such asmitigation strategies or changes to standard operatingprocedures.New