1 

DATE: August 2013 

TO: Docket EPA-HQ-OAR-2010-0929 

FROM: Lisa Grogan-McCulloch 

SUBJECT: Data Elements Deferred to March 31, 2015: List of Data Elements Proposed 

Not To Be Reported

Table 1 lists the data elements for which reporting is deferred to March 31, 2015 (“inputs to 

equations” data elements) that are proposed not to be reported, as specified in the proposed 

rulemaking “Revisions to Reporting and Recordkeeping Requirements, and Proposed 

Confidentiality Determinations under the Greenhouse Gas Reporting Program.” Table 2 lists the 

“inputs to equations” data elements that EPA is not proposing to amend in this action; as a result, 

these data elements would be reported under the proposed rulemaking. 

Table 1. List of “Inputs to Equations” Data Elements Proposed Not To Be Reported 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.3(d)(3)(v) For any facility who submitted an abbreviated emissions report 

under §98.3(d)(3)(v), any facility operating data or process 

information used for the GHG emission calculations. 

 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(b)(9)(iii) Estimate of the heat input from each type of fuel listed in Table C2 that was combusted in the unit during the report year. C-10 
2 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(c)(2)(ix) The flue gases from two or more stationary fuel combustion units 

at a facility are combined together and discharged through a 

common stack or duct before exiting to the atmosphere and if 

CEMS are used to continuously monitor CO2 mass emissions at 

the common stack or duct according to the Tier 4 Calculation 

Methodology, you may report the combined emissions from the 

units sharing the common stack or duct, in lieu of separately 

reporting the GHG emissions from the individual units. This 

monitoring and reporting alternative may also be used when 

process off-gases or a mixture of combustion products and process 

gases are combined together in a common stack or duct before 

exiting to the atmosphere. An estimate of the heat input from each 

type of fuel listed in Table C-2 combusted during the reporting 

year. 

C-10 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1a 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1b 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-8 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ii)(A) For Tier 2: Total quantity of each type of fuel combusted in the 

unit or group of aggregated units (as applicable) during each 

month of the reporting year. Express the quantity of each fuel 

combusted during the measurement period in short tons for solid 

fuels, gallons for liquid fuels, and scf for gaseous fuels. 

C-2b 
3 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ii)(C) High heat values used in the CO2 emissions calculations for each 

fuel combusted during the reporting year. Report a HHV value for 

each calendar month in which HHV determination is required. If 

multiple values are obtained in a given month, report the 

arithmetic average value for the month. 

C-2b 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ii)(D) If Eq. C-2c is used: Ratio of the maximum rate heat input capacity 

to the design rated steam output capacity of the unit. 

C-2c 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ii)(D) If Eq. C-2c is used: Total quantity (i.e., pounds) of steam produced 

from MSW or solid fuel combustion during each month of the 

reporting year. 

C-2c 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-13 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-3 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-4 
4 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-5 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8a 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8b 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of each 

parameter. If multiple values of a parameter are obtained in a 

given month, report the arithmetic average value for the month. 

(CC). 

C-3 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of each 

parameter. If multiple values of a parameter are obtained in a 

given month, report the arithmetic average value for the month. 

(CC). 

C-4 
5 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of each 

parameter. If multiple values of a parameter are obtained in a 

given month, report the arithmetic average value for the month. 

(CC). 

C-5 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(C) Gas molecular weight values used in the emission calculations 

(including both valid and substitute data values). For each 

calendar month of the reporting year in which carbon content and, 

if applicable, molecular weight determination is required, report a 

value of each parameter. If multiple values of a parameter are 

obtained in a given month, report the arithmetic average value for 

the month. 

C-5 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(iv)(F) The annual average HHV, when measured HHV data, rather than 

a default HHV from Table C-1 of this subpart, are used to 

calculate CH4 and N2O emissions for a Tier 3 unit, in accordance 

with §98.33(c)(1). 

C-8 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ix)(D) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

carbon-based F-factor used in Equation C-13 of this subpart. 

C-13 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ix)(E) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

annual average HHV value used in Equation C-13 of this subpart. 

C-13 

C (Stationary fuel 

combustion sources at 

industrial sources, 

excluding stationary 

fuel combustion 

sources connected to 

certain electric 

generators connected 

to the local or 

regional power grid) 1

§98.36(e)(2)(ix)(F) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

total quantity of fossil fuel combusted during the reporting year. 

C-13 

E §98.56(b) Total annual adipic acid production from unit “z” (Pz). E-2 
6 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

E §98.56(b) Total annual adipic acid production from unit “z” (Pz). E-3a 

E §98.56(b) Total annual adipic acid production from unit “z” (Pz). E-3b 

E §98.56(b) Total annual adipic acid production from unit “z” (Pz). E-3c 

E §98.56(b) Total annual adipic acid production from unit “z” (Pz). E-3d 

E §98.56(c) Annual adipic acid production during which N2O abatement 

technology (located after the test point) is operating (Pz,N) . 

E-2 

E §98.56(j)(1) Emission factor for each unit (EFN2Oz). E-3a 

E §98.56(j)(1) Emission factor for each unit (EFN2O). E-3b 

E §98.56(j)(1) Emission factor for each unit (EFN2O). E-3c 

E §98.56(j)(1) Emission factor for each unit (EFN2O). E-3d 

E §98.56(j)(3) Production rate per test run during performance test for each unit 

(P). 

E-1 

F §98.66(a) Annual aluminum production. (MP) F-5 

F §98.66(a) Annual aluminum production. (MP) F-6 

F §98.66(c)(2) Anode effect minutes per cell-day. (AEM) F-2 

F §98.66(c)(2) Anode effect overvoltage factor. (EFCF4) F-3 

F §98.66(c)(2) Anode effect frequency. Used to calculate 

AEM and the slope 

coefficients used as 

an input in Eq. F-2 

F §98.66(c)(2) Anode effect duration. Used to calculate 

AEM and the slope 

coefficients used as 

an input in Eq. F-2 

F §98.66(c)(2) Potline overvoltage. Used to calculate 

the overvoltage 

factor used as an 

input in Eq. F-3 

F §98.66(c)(2) Current efficiency. Used to calculate 

the overvoltage 

factor used as an 

input in Eq. F-3 

F §98.66(c)(3) Smelter-specific slope coefficients. (SCF4) F-2 

F §98.66(c)(3) Overvoltage emission factors. (EFCF4) F-3 

F §98.66(e)(1) Annual anode consumption. (No CEMS) (NAC ) F-5 

F §98.66(f)(1) Annual paste consumption. (No CEMS) (PC ) F-6 

F §98.66(g) Sulfur content in baked anode (percent weight). (Sa) F-5 

F §98.66(g) Ash content in baked anode (percent weight). (Asha) F-5 

F §98.66(g) Binder content of paste (percent weight). (BC) F-6 

F §98.66(g) Sulfur content of pitch (percent weight). (Sp) F-6 

F §98.66(g) Ash content of pitch (percent weight). (Ashp) F-6 

F §98.66(g) Hydrogen content of pitch (percent weight). (Hp) F-6 
7 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

F §98.66(g) Sulfur content in calcined coke (percent weight). (Sc) F-6 

F §98.66(g) Ash content in calcined coke (percent weight). (Ashc) F-6 

F §98.66(g) Carbon in skimmed dust from Soderberg cells (metric ton 

C/metric ton Al) (CD). 

F-6 

F §98.66(g) Initial weight of green anodes (metric tons) (GA). F-7 

F §98.66(g) Annual hydrogen content in green anodes (metric tons) (Hw). F-7 

F §98.66(g) Annual baked anode production (metric tons) (BA). F-7 

F §98.66(g) Annual waste tar collected (metric tons) (WT). F-7 

F §98.66(g) Annual packing coke consumption (metric tons/metric ton baked 

anode) (PCC). 

F-8 

F §98.66(g) Annual baked anode production (metric tons) (BA). F-8 

F §98.66(g) Sulfur content in packing coke (percent weight) (SPc). F-8 

F §98.66(g) Ash content in packing coke (percent weight) (Ashpc). F-8 

G §98.76(b)(2) Monthly quantity of each type of feedstock consumed for 

ammonia manufacturing - Gaseous Feedstock. 

G-1 

G §98.76(b)(2) Monthly quantity of each type of feedstock consumed for 

ammonia manufacturing - Liquid Feedstock. 

G-2 

G §98.76(b)(2) Monthly quantity of each type of feedstock consumed for 

ammonia manufacturing - Solid Feedstock. 

G-3 

G §98.76(b)(7) Carbon content of the gaseous feedstock. G-1 

G §98.76(b)(8) Molecular weight of the gaseous feedstock. G-1 

G §98.76(b)(9) 2 Molar volume conversion factor of the gaseous feedstock. G-1 

G §98.76(b)(10) Carbon content of the liquid feedstock, for month n. G-2 

G §98.76(b)(11) Carbon content of the solid feedstock, for month n. G-3 

H §98.86(b)(2) Monthly clinker production for each kiln (No CEMS). H-2 

H §98.86(b)(5) Quarterly quantity of CKD not recycled to the kiln. H-2 

H §98.86(b)(6) Monthly fraction of total CaO in clinker. H-3 

H §98.86(b)(6) Monthly fraction of total MgO in clinker. H-3 

H §98.86(b)(6) Monthly fraction of non-calcined CaO in clinker. H-3 

H §98.86(b)(6) Monthly fraction of non-calcined MgO in clinker. H-3 

H §98.86(b)(8) Quarterly fraction of total CaO in CKD not recycled to the kiln. H-4 

H §98.86(b)(8) Quarterly fraction of total MgO in CKD not recycled to the kiln. H-4 

H §98.86(b)(8) Quarterly fraction of non-calcined CaO in CKD not recycled to 

the kiln. 

H-4 

H §98.86(b)(8) Quarterly fraction of non-calcined MgO in CKD not recycled to 

the kiln. 

H-4 

H §98.86(b)(10) Monthly kiln-specific clinker CO2 emission factors for each kiln. H-2 

H §98.86(b)(12) Annual organic carbon content of each raw kiln feed or annual 

organic carbon content of each raw material. 

H-5 

H §98.86(b)(13) Annual consumption of each raw kiln feed or annual consumption 

of each raw material. 

H-5 
8 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

H §98.86(b)(15) Monthly kiln-specific raw kiln feed to clinker produced factors (if 

used) for each kiln. 

Used to calculate 

clinker production 

by facilities using 

the method in 40 

CFR 98.84(d) (i.e., 

kiln-specific 

clinker-to-feed 

factors) 

K §98.116(b) Annual production by product from each EAF (tons) (used as 

input to Eq K-1): Mproductk= Annual mass of alloy product k 

tapped from EAF (tons). 

K-1 

K §98.116(b) Annual production by product from each EAF (tons) (used as 

input to Eq K-3). 

K-3 

K §98.116(e)(4) Annual material quantity for each material included for the 

calculation of annual process CO2 emissions (No CEMS): 

Mreducing agenti= Annual mass of reducing agent i fed, charged, 

or otherwise introduced into the EAF (tons). 

K-1 

K §98.116(e)(4) Annual material quantity for each material included for the 

calculation of annual process CO2 emissions (No CEMS): 

Melectrodem= Annual mass of carbon electrode m consumed in 

the EAF (tons). 

K-1 

K §98.116(e)(4) Annual material quantity for each material included for the 

calculation of annual process CO2 emissions (No CEMS): Moreh= 

Annual mass of ore h charged to the EAF (tons). 

K-1 

K §98.116(e)(4) Annual material quantity for each material included for the 

calculation of annual process CO2 emissions (No CEMS): Mfluxj= 

Annual mass of flux material j fed, charged, or otherwise 

introduced into the EAF to facilitate slag formation (tons). 

K-1 

K §98.116(e)(4) Annual material quantity for each material included for the 

calculation of annual process CO2 emissions (No CEMS): Mnonproduct outgoingl= Annual mass of non-product outgoing material 

l removed from EAF (tons). 

K-1 

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Creducing agenti= Carbon content in 

reducing agent i (percent by weight, expressed as a decimal 

fraction). 

K-1 

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Celectrodem= Carbon content of the 

carbon electrode m (percent by weight, expressed as a decimal 

fraction). 

K-1 

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Coreh= Carbon content in ore h (percent 

by weight, expressed as a decimal fraction). 

K-1 
9 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Cfluxj= Carbon content in flux material j 

(percent by weight, expressed as a decimal fraction). 

K-1 

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Cproductk= Carbon content in alloy 

product k . (percent by weight, expressed as a decimal fraction). 

K-1 

K §98.116(e)(5) Annual average of the carbon content determinations for each 

material included for the calculation of annual process CO2

emissions (No CEMS): Cnon-product outgoingl= Carbon content 

in non-product outgoing material l (percent by weight, expressed 

as a decimal fraction). 

K-1 

L §98.126(b)(1) Elements of the sum (a, b, c, etc.) (e.g., measured variables in the 

sum). 

L-1 

L §98.126(b)(1) 2 eSA (absolute error of the sum, expressed as one half of a 95 

percent confidence interval). Note that where eSA = the overall 

absolute error calculated for the process emissions you report 

under §98.126(a)(2), this data element was not deferred in the 

inputs deferral rule (76 FR 53057, August 25, 2011), and would be 

required to be reported. 

L-1 

L §98.126(b)(1) 2 ea, eb, ec = Relative error of a, b, or c, respectively, expressed as 

one half of a 95 percent confidence interval. 

L-1 

L §98.126(b)(1) Elements of the sum (a, b, c, etc.) (e.g., measured variables in the 

sum). 

L-2 

L §98.126(b)(1) a+b+c = Sum of the variables measured. L-2 

L §98.126(b)(1) 2 eSR (relative error of the sum, expressed as one half of a 95 

percent confidence interval). Note that where eSR = the overall 

relative error calculated for the process emissions you report under 

§§98.126(a)(2), this data element was not deferred in the inputs 

deferral rule (76 FR 53057, August 25, 2011), and would be 

required to be reported. 

L-2 

L §98.126(b)(1) 2 eSA (absolute error of the sum, expressed as one half of a 95 

percent confidence interval). Note that where eSA = the overall 

absolute error calculated for the process emissions you report 

under §98.126(a)(2), this data element was not deferred in the 

inputs deferral rule (76 FR 53057, August 25, 2011) , and would 

be required to be reported. 

L-2 

L §98.126(b)(1) Elements of the sum (a, b, c, etc.) (e.g., measured variables in the 

sum). 

L-3 

L §98.126(b)(1) 2 ea, eb, ec = Relative error of a, b, or c, respectively, expressed as 

one half of a 95 percent confidence interval. 

L-3 

L §98.126(b)(1) 2 ePA (absolute error of the product, expressed as one half of a 95 

percent confidence interval). Note that where ePA = the overall 

absolute error calculated for the process emissions you report 

under §98.126(a)(2), this data element was not deferred in the 

inputs deferral rule (76 FR 53057, August 25, 2011) , and would 

be required to be reported. 

L-3 

L §98.126(b)(1) a*b*c = Product of the variables measured. L-3 

L §98.126(b)(1) Measured variables of the product (a, b, c, etc.). L-4 

L §98.126(b)(1) a*b*c = Product of the variables measured. L-4 
10 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

L §98.126(b)(1) 2 ePR (relative error of the product, expressed as one half of a 95 

percent confidence interval). Note that where ePR = the overall 

relative error calculated for the process emissions you report under 

§98.126(a)(2), this data element was not deferred in the inputs 

deferral rule (76 FR 53057, August 25, 2011) , and would be 

required to be reported. 

L-4 

L §98.126(b)(1) 2 ePA (absolute error of the product, expressed as one half of a 95 

percent confidence interval). Note that where ePA = the overall 

absolute error calculated for the process emissions you report 

under §98.126(a)(2), this data element was not deferred in the 

inputs deferral rule (76 FR 53057, August 25, 2011) , and would 

be required to be reported. 

L-4 

L §98.126(b)(2) The balanced chemical equation that describes the reaction used to 

manufacture the fluorinated GHG product and each fluorinated 

GHG transformation product. 

 

L §98.126(b)(6) The mass of each fluorine-containing reactant that is fed into the 

process. (Rd) 

L-6 

L §98.126(b)(7) The mass of each fluorine-containing product produced by the 

process. (P) 

L-6 

L §98.126(b)(8)(i) The mass of each fluorine-containing product that is removed 

from the process and fed into the destruction device (metric tons). 

(Pj) 

L-7 

L §98.126(b)(8)(ii) The mass of each fluorine-containing by-product that is removed 

from the process and fed into the destruction device (metric tons). 

(Bkj) 

L-7 

L §98.126(b)(8)(iii) The mass of each fluorine-containing reactant that is removed 

from the process and fed into the destruction device (metric tons). 

(Rdj) 

L-7 

L §98.126(b)(8)(iv) The mass of each fluorine-containing by-product that is removed 

from the process and recaptured (metric tons). (Bkl) 

L-7 

L §98.126(b)(8)(v) The demonstrated destruction efficiency of the destruction device 

for each fluorinated GHG fed into the device from the process in 

greater than trace concentrations (fraction). (DEFGHGf= 

Destruction efficiency of the device that has been demonstrated 

for fluorinated GHG f in stream j (fraction).) 

L-8 

L §98.126(b)(9)(i) The mass of fluorine in each stream that is fed into the destruction 

device (metric tons). (cTFj * Sj) 

L-17 

L §98.126(b)(9)(ii) The mass of fluorine that is recaptured (metric tons). (cTFl * Sl) L-17 

L §98.126(b)(9)(iii) The weighted average destruction efficiency of the destruction 

device calculated for each stream under §98.123(b)(16). (DEavgj) 

L-17 

L §98.126(c)(1) The quantity of the process activity used to estimate emissions 

(e.g., tons of product produced or tons of reactant consumed). 

(ActivityC or ActivityU) 

L-21 

L §98.126(c)(1) The quantity of the process activity used to estimate emissions 

(e.g., tons of product produced or tons of reactant consumed). 

(ActivityC or ActivityU) 

L-22 

L §98.126(c)(1) The quantity of the process activity used to estimate emissions 

(e.g., tons of product produced or tons of reactant consumed). 

(Activity) 

L-26 

L §98.126(c)(1) The quantity of the process activity used to estimate emissions 

(e.g., tons of product produced or tons of reactant consumed). 

(ActivityU or ActivityC) 

L-27 
11 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

L §98.126(c)(2) The site-specific, process-vent-specific emission factor(s) for each 

process vent (EFPV). 

L-20 

L §98.126(c)(2) The site-specific, process-vent-specific emission factor(s) for each 

process vent (EFPV–C). 

L-21 

L §98.126(c)(2) The site-specific, process-vent-specific emission calculation factor 

for each process vent. (ECFPV-U). 

L-21 

L §98.126(c)(2) The site-specific, process-vent-specific emission factor(s) for each 

process vent (EFPV–U). 

L-22 

L §98.126(c)(2) The site-specific, process-vent-specific emission factor(s) for each 

process vent. (EFPV) 

L-23 

L §98.126(c)(2) The site-specific, process-vent-specific emission calculation factor 

for each process vent. (ECFPV). 

L-25 

L §98.126(c)(2) The site-specific, process-vent-specific emission calculation factor 

for each process vent (ECFPV). 

L-26 

L §98.126(c)(2) The site-specific, process-vent-specific emission calculation factor 

for each process vent. (ECFPV). 

L-27 

L §98.126(d) Where missing data have been estimated pursuant to §98.125 

report, estimate of the missing data. 

Varies 

L §98.126(f)(1) Destruction efficiency (DE) of each destruction device for each 

fluorinated GHG whose destruction the facility reflects in 

§98.123, in accordance with §98.124(g)(1)(i) through (iv). 

(DEFGHGf) 

L-8 

L §98.126(f)(1) Destruction efficiency (DE) of each destruction device for each 

fluorinated GHG whose destruction the facility reflects in 

§98.123, in accordance with §98.124(g)(1)(i) through (iv). 

(DEFGHGf) 

L-18 

L §98.126(f)(1) Destruction efficiency (DE) of each destruction device for each 

fluorinated GHG whose destruction the facility reflects in 

§98.123, in accordance with §98.124(g)(1)(i) through (iv). (DE ) 

L-22 

L §98.126(f)(1) Destruction efficiency (DE) of each destruction device for each 

fluorinated GHG whose destruction the facility reflects in 

§98.123, in accordance with §98.124(g)(1)(i) through (iv) (DE). 

L-27 

L §98.126(f)(1) Destruction efficiency (DE) of each destruction device for each 

fluorinated GHG whose destruction the facility reflects in 

§98.123, in accordance with §98.124(g)(1)(i) through (iv) (DE). 

L-31 

L §98.126(g)(1) The mass of the fluorinated GHG fed into the destruction device. 

(RED) 

L-31 

L §98.126(h)(2) If applicable, the heel factor calculated for each container size and 

type. (hfj) 

L-34 

N §98.146(b)(2) Annual quantity of carbonate based-raw material charged to each 

continuous glass melting furnace (No CEMS). 

N-1 
12 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

N §98.146(b)(4) Carbonate-based mineral mass fraction of carbonate-based raw 

material charged to a furnace. 

N-1 

N §98.146(b)(6) Fraction of calcination for carbonate-based raw material. N-1 

O §98.156(a)(2) Loss Factor used to account for the loss of HCFC– 22 upstream of 

the measurement (LF used in equation O-3). 

O-3 

O §98.156(a)(7) Annual mass of the HFC-23 generated (G23 in Eq. O-4). O-4 

O §98.156(a)(8) Annual mass of any HFC-23 sent off site for sale (S23 in Eq. O-4). O-4 

O §98.156(a)(9) Annual mass of any HFC-23 sent off site for destruction (OD23

used in Eq. O-4). 

O-4 

O §98.156(a)(10) Mass of HFC-23 in storage at the beginning of the year (used to 

calculate I23, which is used in Eq. O-4). 

O-4 

O §98.156(a)(10) Mass of HFC-23 in storage at the end of the year (used to calculate 

I23, which is used in Eq. O-4). 

O-4 

O §98.156(b)(1) Annual mass of HFC-23 fed into the destruction device (FD used 

in Eq. O-8 and O-9). 

O-8 

O §98.156(b)(1) Annual mass of HFC-23 fed into the destruction device (FD used 

in Eq. O-8 and O-9). 

O-9 

O §98.156(b)(2) Annual mass of HFC-23 destroyed (D23 used in Eq. O-8). O-8 

O §98.156(d)(1) If the HFC-23 concentration measured pursuant to §98.154(l) is 

greater than that measured during the performance test that is the 

basis for the destruction efficiency (DE), report flow rate of HFC23 being fed into the destruction device in kg/hr. 

No Equation - Used 

to calculate 

Destruction 

Efficiency 

O §98.156(d)(5) If the HFC-23 concentration measured pursuant to §98.154(l) is 

greater than that measured during the performance test that is the 

basis for the destruction efficiency (DE), report the destruction 

efficiency (DE) calculated from paragraphs (d)(1) and (d)(4) of 

this section. 

O-9 

O §98.156(e)(1) (One time report) Destruction efficiency (DE) (by March 31, 2011 

or within 60 days of commencing HFC-23 destruction). 

O-9 

P §98.156(b)(2) Monthly consumption of each fuel and feedstock by type used for 

hydrogen production (No CEMS): gaseous. 

P-1 

P §98.156(b)(2) Monthly consumption of each fuel and feedstock by type used for 

hydrogen production (No CEMS) (Fdstkn): Liquid. 

P-2 

P §98.156(b)(2) Monthly consumption of each fuel and feedstock by type used for 

hydrogen production (No CEMS) (Fdstkn): solid. 

P-3 

P §98.156(b)(5) Monthly analyses of carbon content for each fuel and feedstock 

used in hydrogen production: Gaseous. 

P-1 

P §98.156(b)(5) Monthly analyses of carbon content for each fuel and feedstock 

used in hydrogen production: Liquid. 

P-2 

P §98.156(b)(5) Monthly analyses of carbon content for each fuel and feedstock 

used in hydrogen production: Solid. 

P-3 

P §98.156(b)(6) Monthly analyses of the molecular weight of gaseous fuels and 

feedstocks. 

P-1 

Q §98.176(b) Annual quantity taconite pellets produced (No CEMS). Q-1 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 
13 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(b) Annual quantity coke produced (No CEMS ). Q-2 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity iron produced (No CEMS). Q-2 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity raw steel produced (No CEMS). Q-2 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity sinter produced (No CEMS). Q-4 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity raw steel produced (No CEMS). Q-5 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity raw steel produced (No CEMS). Q-6 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(b) Annual quantity iron produced (No CEMS). Q-7 or the 

calculation method 

specified in 

98.273(b)(2)(iv) for 

the site-specific 

emission factor 

method 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - solid fuel combusted (Csf). 

Q-1 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) -gaseous fuel combusted(Cgf). 

Q-1 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- liquid fuel combusted (Clf). 

Q-1 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- greenball pellets produced (Co). 

Q-1 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2 

emissions (No CEMS) - Fired pellets produced (Cp). 

Q-1 
14 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - air pollution control residue collected 

(Cr). 

Q-1 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Iron (Ciron). 

Q-2 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Scrap (Cscrap). 

Q-2 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Flux (Cflux). 

Q-2 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Carbonaceous material (Ccarbon). 

Q-2 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Steel produced (Csteel). 

Q-2 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Slag produced (Cslag). 

Q-2 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

(CR). 

Q-2 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Coal charged to coke battery (Ccoal). 

Q-3 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Coke produced by coke battery (Ccoke). 

Q-3 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

from coke battery (CR). 

Q-3 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Gaseous fuel combusted in the sinter 

process (Cgf). 

Q-4 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - sinter feed (CFeed). 

Q-4 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - sinter (CSinter). 

Q-4 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

from sinter process (CR). 

Q-4 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Iron (Ciron) used in EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Scrap (Cscrap) used in EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Flux (Cflux) used in EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Carbonaceous material (Ccarbon) used in 

EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Electrode consumed in EAF (Celectrode). 

Q-5 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Steel produced (Csteel) in EAF. 

Q-5 
15 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Slag produced (Cslag) in EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

(CR) for EAF. 

Q-5 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - molten steel before decarburization 

(Csteelout) in EAF. 

Q-6 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - molten steel after decarburization 

(Csteelout) in EAF. 

Q-6 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

(CR) for EAF. 

Q-6 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - Gaseous fuel combusted in the direct 

reduction furnace (Fg) . 

Q-7 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - iron ore or iron ore pellets fed into the 

direct reduction furnace (Core) . 

Q-7 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS)- Carbonaceous material (Ccarbon) used in the 

direct reduction furnace . 

Q-7 

Q §98.176(e)(1) Carbon content of each process input used to determine CO2

emissions (No CEMS) - Other materials charged to the direct 

reduction furnace (Cother). 

Q-7 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Iron produced from direct reduction 

furnace (Ciron). 

Q-7 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Non-metallic materials produced from 

direct reduction furnace (CNM). 

Q-7 

Q §98.176(e)(1) Carbon content of each process output used to determine CO2

emissions (No CEMS) - Air pollution control residue collected 

(CR) for direct reduction furnace. 

Q-7 

Q §98.176(e)(3) Annual volume of each type of gaseous fuel used to determine 

CO2 emissions (reported separately for each type in standard cubic 

feet) (No CEMS) - Taconite Indurating Furnace. 

Q-1 

Q §98.176(e)(3) Annual volume of each type of liquid fuel used to determine CO2

emissions (reported separately for each type in gallons) (No 

CEMS). 

Q-1 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of greenball 

(taconite) pellets fed into the furnace (O). 

Q-1 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of solid fuel 

combusted (Fs). 

Q-1 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue (R). 

Q-1 
16 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of fired 

pellets produced (P). 

Q-1 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of molten 

iron charged to furnace (Iron). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of scrap 

charged to the furnace (Scrap). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of flux 

charged to the furnace (Flux). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of carbon 

(e.g., coal, coke) charged to furnace (Carbon). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of steel 

produced (Steel). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of slag 

produced (Slag). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected (Residue). 

Q-2 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Coal charged to battery 

(Coal). 

Q-3 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of coke 

produced (Coke). 

Q-3 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected from battery (R). 

Q-3 

Q §98.176(e)(3) Annual volume of each type of gaseous fuel used to determine 

CO2 emissions (reported separately for each type in standard cubic 

feet) (No CEMS) - Sinter process (Fg). 

Q-4 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of sinter feed 

material (Feed). 

Q-4 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of sinter 

Produced (Sinter). 

Q-4 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected from sinter process (R). 

Q-4 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of direct 

reduced iron charged to the EAF (Iron). 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of Scrap 

charged to the EAF(Scrap). 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of flux 

charged to the EAF(Flux). 

Q-5 
17 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of carbon 

electrode consumed in the EAF(Electrode). 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of 

carbonaceous (coal or coke) material charged to the EAF(Carbon). 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of steel 

produced (Steel) in EAF. 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of slag 

produced (Slag) in EAF. 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected (Residue) from EAF. 

Q-5 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of steel 

charged to the decarburization vessel (Steel). 

Q-6 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected (Residue) from the 

decarburization vessel. 

Q-6 

Q §98.176(e)(3) Annual volume of each type of gaseous fuel used to determine 

CO2 emissions (reported separately for each type in standard cubic 

feet) (No CEMS) - direct reduction furnaces (Fg). 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of iron ore or 

iron ore pellets charged to the direct reduction furnace (Ore). 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of 

carbonaceous (coal or coke) material charged to the direct 

reduction furnace (Carbon). 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of other 

material charged to the direct reduction furnace (Other). 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of iron 

produced (Iron) in direct reduction furnace. 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process input used to 

determine CO2 emissions (No CEMS)- Annual mass of nonmetallic materials produced (NM) in direct reduction furnace. 

Q-7 

Q §98.176(e)(3) Annual mass (in metric tons) of each other process output used to 

determine CO2 emissions (No CEMS) - Annual mass of air 

pollution control residue collected (Residue) from the direct 

reduction furnace. 

Q-7 

Q §98.176(e)(4) Molecular weight of gaseous fuels (No CEMS) - Taconite 

Indurating Furnace. 

Q-1 

Q §98.176(e)(4) Molecular weight of gaseous fuels (No CEMS) - Sinter Process. Q-4 

Q §98.176(e)(4) Molecular weight of gaseous fuels (No CEMS) - Direct Reduction 

Furnace. 

Q-7 

Q §98.176(f)(2) Average hourly feed rate during the test (No CEMS). No Equation - Used 

as input in calc. 

method described in 

§98.173(b)(2)(iii). 
18 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Q §98.176(f)(2) Average hourly production rate during the test (No CEMS). No Equation - Used 

as input in calc. 

method described in 

§98.173(b)(2)(iii). 

Q §98.176(f)(3) Site-specific emission factor (No CEMS). No Equation - Used 

as input in calc. 

method described in 

§98.173(b)(2)(iv). 

Q §98.176(f)(4) Annual feed rate used to estimate annual CO2 emissions (No 

CEMS). 

No Equation - Used 

as input in calc. 

method described in 

§98.173(b)(2)(iv). 

Q §98.176(f)(4) Annual production rate used to estimate annual CO2 emissions 

(No CEMS). 

No Equation - Used 

as input in calc. 

method described in 

§98.173(b)(2)(iv). 

Q §98.176(g) The annual amount of coal charged to the coke ovens (in metric 

tons). 

No Equation - Used 

as input in calc. 

method described in 

§98.173(c). 

R §98.186(b)(6) Annual material quantity used for the calculation of annual 

process CO2 emissions (No CEMS) (Ore = Annual mass of lead 

ore charged to the smelting furnace (tons).) 

R-1 

R §98.186(b)(6) Annual material quantity used for the calculation of annual 

process CO2 emissions (No CEMS) (Scrap = Annual mass of lead 

scrap charged to the smelting furnace (tons).) 

R-1 

R §98.186(b)(6) Annual material quantity used for the calculation of annual 

process CO2 emissions (No CEMS) (Flux = Annual mass of flux 

materials (e.g., limestone, dolomite) charged to the smelting 

furnace (tons).) 

R-1 

R §98.186(b)(6) Annual material quantity used for the calculation of annual 

process CO2 emissions (No CEMS) (Carbon = Annual mass of 

carbonaceous materials (e.g., coal, coke) charged to the smelting 

furnace (tons).) 

R-1 

R §98.186(b)(6) Annual material quantity used for the calculation of annual 

process CO2 emissions (No CEMS) (Other = Annual mass of any 

other material containing carbon, other than fuel, fed, charged, or 

otherwise introduced into the smelting furnace (tons).) 

R-1 

R §98.186(b)(7) Annual average of the carbon content determinations for each 

material used for the calculation of annual process CO2 emissions 

(No CEMS) (COre= Carbon content of the lead ore, from the 

carbon analysis results (percent by weight, expressed as a decimal 

fraction).) 

R-1 

R §98.186(b)(7) Annual average of the carbon content determinations for each 

material used for the calculation of annual process CO2 emissions 

(No CEMS). (CScrap= Carbon content of the lead scrap, from the 

carbon analysis (percent by weight, expressed as a decimal 

fraction).) 

R-1 

R §98.186(b)(7) Annual average of the carbon content determinations for each 

material used for the calculation of annual process CO2 emissions 

(No CEMS). (CFlux= Carbon content of the flux materials, from 

the carbon analysis (percent by weight, expressed as a decimal 

fraction).) 

R-1 
19 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

R §98.186(b)(7) Annual average of the carbon content determinations for each 

material used for the calculation of annual process CO2 emissions 

(No CEMS). (CCarbon= Carbon content of the carbonaceous 

materials, from the carbon analysis (percent by weight, expressed 

as a decimal fraction).) 

R-1 

R §98.186(b)(7) Annual average of the carbon content determinations for each 

material used for the calculation of annual process CO2 emissions 

(No CEMS). (COther= Carbon content of the other material from 

the carbon analysis results (percent by weight, expressed as a 

decimal fraction).) 

R-1 

S §98.196(b)(2) Monthly emission factors for each lime type produced. S-4 

S §98.196(b)(3) Monthly emission factors for each calcined byproduct/waste by 

lime type that is sold. (EFLKD,i,n) 

S-4 

S §98.196(b)(5) Monthly results of chemical composition analysis of each type of 

lime product produced (CaOi,n and MgOi,n) (No CEMS). 

S-1 

S §98.196(b)(5) Monthly results of chemical composition analysis of each type of 

calcined lime byproducts/wastes sold (CaOLKDi,n and 

MgOLKDi,n) (No CEMS). 

S-2 

S §98.196(b)(6) Annual results of chemical composition analysis of each type of 

lime byproducts/wastes that is not sold ( CaOwastei,n and 

MgOwastei,n) (No CEMS). 

S-3 

S §98.196(b)(8) Monthly amount of lime product sold, by type (No CEMS). Calculation method 

described in 

§98.194(a) 

S §98.196(b)(10) Monthly amount of calcined lime byproduct/waste sold, by type 

(MLKDi,n) (No CEMS). 

S-4 

S §98.196(b)(11) Annual amount of calcined lime byproduct/waste that is not sold, 

by type (Mwastei) (No CEMS). 

S-3 

S §98.196(b)(12) Monthly weight or mass of each lime type produced (MLIMEi,n) 

(No CEMS). 

S-4 

U §98.216(b) Annual carbonate consumption by carbonate type. U-1 

U §98.216(b) Annual carbonate input by carbonate type. U-2 

U §98.216(e)(1) Annual carbonate consumption by carbonate type. U-1 

U §98.216(e)(2) Annual calcination fractions used in calculations. U-1 

U §98.216(f)(1) Annual carbonate input by carbonate type. U-2 

U §98.216(f)(2) Annual carbonate output by carbonate type. U-2 

V 3 §98.226(d) Annual nitric acid production during which N2O abatement 

technology is operating (tons, 100% acid basis). 

V-2 

V 3 §98.226(m)(1) Emission factor calculated for each nitric acid train (EFN2Ot). V-3a 

V 3 §98.226(m)(1) Emission factor calculated for each nitric acid train (EFN2Ot). V-3b 

V 3 §98.226(m)(1) Emission factor calculated for each nitric acid train (EFN2Ot). V-3c 

V 3 §98.226(m)(1) Emission factor calculated for each nitric acid train (EFN2Ot). V-3d 

V 3 §98.226(m)(3) Production rate per test run during performance test for each train. V-1 

X §98.246(a)(4) Indicate whether you used the alternative to sampling and 

analysis. 

X-1 
20 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

X §98.246(a)(4) Monthly volume values (used in Equations X-1 to X-3) - Volume 

of gaseous feedstock I introduced in month "n" ((Fgf)n).

X-1 

X §98.246(a)(4) Monthly volume values (used in Equations X-1 to X-3) - Volume 

of gaseous product i produced in month "n" ((Pgf)n)

X-1 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the gaseous feedstock I for month "n" 

((CCgf)n). 

X-1 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the gaseous product i for month "n" 

((CCgp)n). 

X-1 

X §98.246(a)(4) Molecular weights for gaseous feedstocks (used in Equation X-1). X-1 

X §98.246(a)(4) Molecular weights for gaseous products (used in Equation X-1). X-1 

X §98.246(a)(4) Indicate whether you used the alternative to sampling and 

analysis. 

X-2 

X §98.246(a)(4) Monthly volume values (used in Equations X-1 to X-3) - Volume 

of liquid feedstock i for month "n" ((Flf)n ). 

X-2 

X §98.246(a)(4) Monthly volume values (used in Equations X-1 to X-3) - Volume 

of liquid product i for month "n" ((Plp)n ) . 

X-2 

X §98.246(a)(4) Monthly mass values (used in Equations X-1 to X-3) - Mass of 

liquid feedstock i for month "n" ((Flf)n ). 

X-2 

X §98.246(a)(4) Monthly mass values (used in Equations X-1 to X-3) - Mass of 

liquid product i for month "n" ((Plp)n ). 

X-2 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the liquid feedstock i for month "n" 

((CClf)n). 

X-2 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the liquid product i for month "n" 

((CClp)n). 

X-2 

X §98.246(a)(4) Indicate whether you used the alternative to sampling and 

analysis. 

X-3 

X §98.246(a)(4) Monthly mass values (used in Equations X-1 to X-3) - Mass of 

solid feedstock I for month "n" ((Fsf)n). 

X-3 

X §98.246(a)(4) Monthly mass values (used in Equations X-1 to X-3) - Mass of 

solid product i for month "n" ((Psp)n). 

X-3 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the solid feedstock i for month "n" 

((CClf)n). 

X-3 

X §98.246(a)(4) Monthly carbon content values (used in Equations X-1 to X-3) - 

Average carbon content of the solid product i for month "n" 

((CClp)n). 

X-3 

X §98.246(b)(5)(iii) Quantity of each type of fuel used in equation C-8 in §98.33(c) for 

each stationary combustion unit or group of units (as applicable) 

during the reporting year, expressed in short tons for solid fuels, 

gallons for liquid fuels, and scf for gaseous fuels. 

C-8 

X §98.246(b)(5)(iv) The HHV (either default or annual average from measured data) 

used in equation C-8 in §98.33(C) for each stationary combustion 

unit or group of units (as applicable). 

C-8 
21 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Y §98.256(e)(6)2 If using Equation Y-1a: report the molar volume conversion factor 

(in scf/g-mole) for each flare. 

Y-1a 

Y §98.256(e)(7)2 If using Equation Y-1b: report molar volume conversion factor for 

each flare. 

Y-1b 

Y §98.256(e)(7)(ii) If using Equation Y-1b: report the carbon mole number of each 

carbon containing compound other than CO2 in the flare gas 

stream for each flare. 

Y-1b 

Y §98.256(e)(9) Annual volume of flare gas combusted during normal operations. Y-3 

Y §98.256(e)(9) Annual average higher heating value of the flare gas (normal). Y-3 

Y §98.256(e)(9) Volume of gas flared during SSM event. Y-3 

Y §98.256(e)(9) Average molecular weight (SSM). Y-3 

Y §98.256(e)(9) Carbon content of the flare gas (SSM). Y-3 

Y §98.256(e)(9)2 If using Equation Y-3: report the molar volume conversion factor 

for each flare. 

Y-3 

Y §98.256(e)(10)2 Fraction of carbon in the flare gas contributed by methane (used in 

Equation Y-4). 

Y-4 

Y §98.256(f)(7)2 If using Equation Y-6: report the molar volume conversion factor. Y-6 

Y §98.256(f)(10) Coke burn-off factor. Y-8 

Y §98.256(f)(10) Annual throughput of unit. Y-8 

Y §98.256(f)(10) Average carbon content of coke. Y-8 

Y §98.256(f)(11) If you use a unit-specific emission factor for CH4: report the unitspecific emission factor for CH4 each catalytic cracking units, 

traditional fluid coking units, and catalytic reforming units. 

Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(f)(11)2 Units of measure for the unit-specific CH4 emission factor. Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(f)(11) Activity data for calculating emissions (input). Used in method 

specified in 

§98.255(c)(4) 

Y §98.256(f)(11) Activity data for calculating emissions (product). Used in method 

specified in 

§98.255(c)(4) 

Y §98.256(f)(12) Activity data for calculating emissions (input). Used in method 

specified in 

§98.255(c)(5) 

Y §98.256(f)(12) Activity data for calculating emissions (production). Used in method 

specified in 

§98.255(c)(5) 

Y §98.256(f)(12) If a unit-specific emission factor for N2O was used: report the 

unit-specific emission factor for N2O each catalytic cracking 

units, traditional fluid coking units, and catalytic reforming units. 

Used in method 

specified in 

§98.253(c)(5) 

Y §98.256(f)(12)2 Units of measure for the unit-specific N2O emission factor. Used in method 

specified in 

9§8.253(c)(5) 

Y §98.256(f)(13) Average carbon content of coke. Y-11 
22 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Y §98.256(h)(4)2 If Equation Y-12 is used: report the molar volume conversion 

factor. 

Y-12 

Y §98.256(h)(4) If Equation Y-12 is used: Annual volumetric flow to the sulfur 

recovery plant. 

Y-12 

Y §98.256(h)(4) If Equation Y-12 is used: Annual average mole fraction of carbon 

in the sour gas. 

Y-12 

Y §98.256(h)(5) Annual volume of recycled tail gas (if used to calculate recycling 

correction factor). 

If a correction for 

CO2 emissions in 

the tail gas was 

used in Eq. Y-12, 

used in method 

specified in 

§98.253(f)(5) 

Y §98.256(h)(5) Annual average mole fraction of carbon in the tail gas (if used to 

calculate recycling correction factor). 

If a correction for 

CO2 emissions in 

the tail gas was 

used in Eq. Y-12, 

used in method 

specified in 

§98.253(f)(5) 

Y §98.256(i)(5) If you use Eq. Y-13, report the annual mass of green coke fed to 

the for each coke calcining unit 

Y-13 

Y §98.256(i)(5) If you use Eq. Y-13, report the carbon content of green coke fed to 

the for each coke calcining unit. 

Y-13 

Y §98.256(i)(5) If you use Eq. Y-13, report the annual mass of marketable coke 

produced for each coke calcining unit. 

Y-13 

Y §98.256(i)(5) If you use Eq. Y-13, report the carbon content of marketable coke 

produced for each coke calcining unit. 

Y-13 

Y §98.256(i)(5) If Equation Y-13 used for coke calcining units: report the annual 

mass of coke dust removed from the process through collected in 

dust collection systems. 

Y-13 

Y §98.256(i)(7) For coke calcining: Activity data for calculating emissions (input 

data). 

Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(i)(7) For coke calcining: Activity data for calculating emissions 

(production data). 

Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(i)(7) For coke calcining: The unit-specific CH4 emission factor. Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(i)(7) 2 For coke calcining: Units of measure for the unit-specific CH4

emission factor. 

Used in method 

specified in 

§98.253(c)(4) 

Y §98.256(i)(8) For coke calcining: If a unit specific emission factor was used for 

the N2O factor: report the activity data used for calculating 

emissions. 

Used in method 

specified in 

§98.253(c)(5) 

Y §98.256(i)(8) For coke calcining: If a unit-specific emission factor for N2O was 

used, report the site-specific emission factor. 

Used in method 

specified in 

§98.253(c)(5) 

Y §98.256(i)(8)2 For coke calcining: If a unit specific emission factor was used for 

the N2O factor: report the units of measure for the unit-specific 

factor . 

Used in method 

specified in 

§98.253(c)(5) 

Y §98.256(j)(2) Quantity of asphalt blown for each asphalt blowing unit. Y-14 
23 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Y §98.256(j)(2) Quantity of asphalt blown for each asphalt blowing unit. Y-15 

Y §98.256(j)(2) Quantity of asphalt blown for each asphalt blowing unit. Y-16a 

Y §98.256(j)(2) Quantity of asphalt blown for each asphalt blowing unit. Y-16b 

Y §98.256(j)(2) Quantity of asphalt blown for each asphalt blowing unit. Y-17 

Y §98.256(j)(5) CO2 emission factor for each asphalt blowing unit. Y-14 

Y §98.256(j)(6) CH4 emission factor for each asphalt blowing unit. Y-15 

Y §98.256(j)(7) If Equation Y-16 is used: report the carbon emission factor. Y-16a 

Y §98.256(j)(8) If Equation Y-16b is used: report the CO2 emission factor used. Y-16b 

Y §98.256(j)(8) If Equation Y-16b is used: report the carbon emission factor. Y-16b 

Y §98.256(j)(9) If you use Eq. Y-17: CH4 emission factor. Y-17 

Y §98.256(k)(3) For delayed coking units: Dimensions of coke drum or vessel. Y-18 

Y §98.256(k)(3) For delayed coking units: Typical gauge pressure of the coking 

drum when first vented to the atmosphere. 

Y-18 

Y §98.256(k)(3) For delayed coking units: Typical void fraction of coke drum or 

vessel. 

Y-18 

Y §98.256(k)(3) For delayed coking units: Annual number of coke-cutting cycles 

of coke drum or vessel. 

Y-18 

Y §98.256(k)(3)2 For delayed coking units: report the molar volume conversion 

factor for each coke drum or vessel. 

Y-18 

Y §98.256(k)(4) For delayed coking units: Height and diameter of the coke drums. Y-18 

Y §98.256(k)(4) For delayed coking units: Cumulative number of vessel openings 

for all delayed coking drums in the set. 

Y-18 

Y §98.256(k)(4) For delayed coking units: Typical venting pressure. Y-18 

Y §98.256(k)(4) For delayed coking units: Void fraction. Y-18 

Y §98.256(l)(5)2 For each process vent: Molar volume conversion factor. Y-19 

Y §98.256(m)(3) Uncontrolled blowdown systems reporting under §98.253 (k): CH4

emission factor used. 

Y-20 

Y §98.256(m)(3)2 Uncontrolled blowdown systems reporting under §98.253 (k): 

Molar volume conversion factor. 

Y-20 

Y §98.256(m)(3) Uncontrolled blowdown systems reporting under §98.253 (k): 

Total quantity of crude oil plus the quantity of intermediate 

products received from off-site that are processed at the facility in 

the reporting year. 

Y-20 

Y §98.256(o)(2)(ii) Total quantity of crude oil plus the quantity of intermediate 

products received from off-site that are processed at the facility in 

the reporting year. 

Y-22 

Y §98.256(o)(4)(ii) For storage tanks that process unstabilized crude oil: Quantity of 

unstabilized crude oil received during the calendar year. 

Y-23 

Y §98.256(o)(4)(iii) For storage tanks that process unstabilized crude oil: Average 

pressure differential. 

Y-23 

Y §98.256(o)(4)(iv)2 For storage tanks that process unstabilized crude oil: Molar 

volume conversion factor. 

Y-23 
24 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

Y §98.256(o)(4)(v) For storage tanks that process unstabilized crude oil: Average 

Mole fraction of CH4 in vent gas from the unstabilized crude oil 

storage tanks. 

Y-23 

Y §98.256(o)(6) Mole fraction of CH4 in vent gas from the unstabilized crude oil 

storage tank. 

Y-23 

Y §98.256(o)(6) Average pressure differential. Y-23 

Y §98.256(o)(6) Quantity of unstabilized crude oil received during the calendar 

year. 

Y-23 

Y §98.256(o)(7) Tank-specific methane composition data. Used in methods 

specified in 

§98.253(m)(2) 

Y §98.256(o)(7) Gas generation rate data. Used in methods 

specified in 

§98.253(m)(2) 

Y §98.256(p)(2) For loading operations: Quantity of materials loaded by vessel 

type that have an equilibrium vapor-phase concentration of CH4 of 

0.5 volume percent or greater. 

Used in methods 

specified in AP-42, 

Section 5.2 

(referenced by 

§98.253(n)) 

Z §98.266(f)(5) Monthly inorganic carbon content of phosphate rock for each wetprocess phosphoric acid process line for which Equation Z-1a is 

used (percent by weight, expressed as decimal fraction) (No 

CEMS). 

Z-1a 

Z §98.266(f)(5) Monthly CO2 (ton CO2/ton of phosphate rock) for which Equation 

Z-1b is used (No CEMS). 

Z-1b 

Z §98.266(f)(6) Monthly mass of phosphate rock consumed by origin in 

production. 

Z-1a 

Z §98.266(f)(6) Monthly mass of phosphate rock consumed by origin in 

production. 

Z-1b 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

furnaces. 

C-1 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

furnaces. 

C-1a 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

furnaces. 

C-1b 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

furnaces. 

C-2a 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

furnaces. 

C-3 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-4 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-5 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-8 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-8a 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-8b 

AA §98.276(b) Annual quantities of fossil fuels used in chemical recovery 

combustion units. 

C-9a 

AA §98.276(c) Annual mass of the spent liquor solids combusted. AA-1 
25 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

AA §98.276(c) Annual mass of the spent liquor solids combusted. AA-2 

AA §98.276(d) High heat value (HHV) of the spent liquor solids used in Equation 

AA-1. 

AA-1 

AA §98.276(f) Carbon content of the spent liquor solids used in Equation AA-2. AA-2 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-1 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-1a 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-1b 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-2a 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-3 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-4 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-5 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-8 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-8a 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-8b 

AA §98.276(g) Annual quantities of fossil fuels used in pulp mill lime kilns. C-9a 

AA §98.276(h) Make-up quantity of CaCO3 used for the reporting year used in 

Equation AA-3. 

AA-3 

AA §98.276(i) Make-up quantity of Na2CO3 used for the reporting year used in 

Equation AA-3. 

AA-3 

BB §98.286(b)(1) Monthly consumption of petroleum coke (No CEMS). BB-2 

BB §98.286(b)(4) Carbon content factor of petroleum coke from the supplier or as 

measured by the applicable method. 

BB-1 

BB §98.286(b)(6) CO2 emissions factor for each month. BB-2 

CC §98.296(b)(5) Monthly consumption of trona or liquid alkaline feedstock for 

each manufacturing line (No CEMS) (for facilities using Equation 

CC-1). 

CC-1 

CC §98.296(b)(6) Monthly production of soda ash for each manufacturing line (tons) 

(for facilities using Equation CC-2). 

CC-2 

CC §98.296(b)(7) Inorganic carbon content factor of soda ash. CC-1 

CC §98.296(b)(7) Inorganic carbon content factor of trona . CC-2 

EE §98.316(b)(6) Monthly calcined petroleum coke consumption for each 

production line (No CEMS). 

EE-2 

EE §98.316(b)(9) Monthly carbon content factor of petroleum coke (percent by 

weight expressed as a decimal fraction) (No CEMS). 

EE-2 

GG §98.336(b)(6) Annual mass of each carbon-containing input material charged to 

each kiln or furnace (No CEMS) - Mass of zinc bearing material. 

GG-1 

GG §98.336(b)(6) Annual mass of each carbon-containing input material charged to 

each kiln or furnace (No CEMS) - Annual mass of flux materials 

(e.g., limestone, dolomite) charged to kiln or furnace “k” (tons). 

GG-1 

GG §98.336(b)(6) Annual mass of each carbon-containing input material charged to 

each kiln or furnace (No CEMS) - Annual mass of carbon 

electrode consumed in furnace “k”. 

GG-1 
26 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . .

GG §98.336(b)(6) Annual mass of each carbon-containing input material charged to 

each kiln or furnace (No CEMS) - Annual mass of other 

carbonaceous material consumed in furnace “k”. 

GG-1 

GG §98.336(b)(7) Carbon content of carbon-containing input materials charged to 

kilns or furnace (including zinc bearing material, flux materials, 

and other carbonaceous materials) from the annual carbon analysis 

or from information provided by the material supplier) for each 

kiln or furnace (percent by weight, expressed as a decimal 

fraction) (No CEMS) - zinc bearing material. 

GG-1 

GG §98.336(b)(7) Carbon content of carbon-containing input materials charged to 

kilns or furnace (including zinc bearing material, flux materials, 

and other carbonaceous materials) from the annual carbon analysis 

or from information provided by the material supplier) for each 

kiln or furnace (percent by weight, expressed as a decimal 

fraction) (No CEMS) - flux materials. 

GG-1 

GG §98.336(b)(7) Carbon content of carbon-containing input materials charged to 

kilns or furnace (including zinc bearing material, flux materials, 

and other carbonaceous materials) from the annual carbon analysis 

or from information provided by the material supplier) for each 

kiln or furnace (percent by weight, expressed as a decimal 

fraction) (No CEMS) - other carbonaceous materials. 

GG-1 

GG §98.296(b)(10) Carbon content of the carbon electrodes used in each furnace from 

the annual carbon analysis or from information provided by the 

material supplier) (percent by weight, expressed as a decimal 

fraction) (No CEMS). 

GG-1 

TT §98.466(c)(3)(i) Total number of years (N) for which disposal and production data 

are both available. 

TT-2 

TT §98.466(c)(3)(ii) The waste disposal quantity for each year used in Equation TT–2 

of this subpart to calculate the average waste disposal factor 

(WDF). 

TT-2 

TT §98.466(c)(3)(iii) Average waste disposal factor (WDF) calculated for the waste 

stream. 

TT-3 

1

 Stationary fuel combustion sources connected to certain electric generators connected to the local or regional power grid include stationary fuel 

combustion sources (e.g., individual units, aggregations of units, common pipes, or common stacks) subject to subpart C of Part 98 that meet the 

following criteria: (1) the stationary fuel combustion source contains at least one combustion unit connected to a fuel-fired electric generators that 

has been granted access by the Public Utilities Commission to deliver power to the local or regional electric power grid (excluding electric 

generators that are connected to combustion units subject to subpart D of Part 98); and (2) the stationary fuel combustion source is located at a 

facility for which the sum of the nameplate capacities for all such electric generators is greater than or equal to 1 megawatt electric output. 2

 Data element would not be useful for data verification and would not inform future GHG policy development, in the absence of other data 

elements included in this table for which we are proposing to remove the reporting requirement. 3

 This table excludes the five subpart V “inputs to equations” data elements in §98.226(c) (included in Table A-7 of subpart A of part 98). In its 

memorandum “Evaluation of Competitive Harm from Disclosure of “Inputs to Equations” Data Elements Deferred to March 31, 2015” (refer to 

docket EPA-HQ-OAR-2010-0929), EPA identified these five “inputs to equations” data elements as production or raw material data, which were 

identified as having disclosure concerns. Based on these analysis results, EPA would have included these data elements in this table as part of its 

proposal to remove reporting of these data; however, EPA has excluded the data elements from this table because §98.226(c) is already removed 

from Subpart V. §98.226(c) was inadvertently removed and reserved in conjunction with the 2010 technical corrections rulemaking (75 FR 

79157, December 17, 2010); based on the results of its analysis, EPA is not taking any action to reinstate this provision. 

Table 2. List of “Inputs to Equations” Data Elements That EPA is Not Amending Under 

the Proposed Revisions to Part 98 (i.e., Data Elements Would Be Reported) 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 
27 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.3(d)(3)(v) For any facility who submitted an abbreviated emissions report 

under §98.3(d)(3)(v), any facility operating data or process 

information used for the GHG emission calculations. 

 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(b)(9)(iii) Estimate of the heat input from each type of fuel listed in Table 

C-2 that was combusted in the unit during the report year. 

C-10 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(c)(2)(ix) The flue gases from two or more stationary fuel combustion units 

at a facility are combined together and discharged through a 

common stack or duct before exiting to the atmosphere and if 

CEMS are used to continuously monitor CO2 mass emissions at 

the common stack or duct according to the Tier 4 Calculation 

Methodology, you may report the combined emissions from the 

units sharing the common stack or duct, in lieu of separately 

reporting the GHG emissions from the individual units. This 

monitoring and reporting alternative may also be used when 

process off-gases or a mixture of combustion products and 

process gases are combined together in a common stack or duct 

before exiting to the atmosphere. An estimate of the heat input 

from each type of fuel listed in Table C-2 combusted during the 

reporting year. 

C-10 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1a 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-1b 
28 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(i) Total quantity of each type of fuel combusted in each unit or 

group of aggregated units (as applicable) during the reporting 

year, in short tons for solid fuels, gallons for liquid fuels and 

standard cubic feet for gaseous fuels, or, if applicable, therms or 

mmBtu for natural gas. 

C-8 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ii)(A) For Tier 2: Total quantity of each type of fuel combusted in the 

unit or group of aggregated units (as applicable) during each 

month of the reporting year. Express the quantity of each fuel 

combusted during the measurement period in short tons for solid 

fuels, gallons for liquid fuels, and scf for gaseous fuels. 

C-2b 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ii)(C) High heat values used in the CO2 emissions calculations for each 

fuel combusted during the reporting year. Report a HHV value 

for each calendar month in which HHV determination is required. 

If multiple values are obtained in a given month, report the 

arithmetic average value for the month. 

C-2b 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ii)(D) If Eq. C-2c is used: Total quantity (i.e., pounds) of steam 

produced from MSW or solid fuel combustion during each month 

of the reporting year. 

C-2c 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ii)(D) If Eq. C-2c is used: Ratio of the maximum rate heat input 

capacity to the design rated steam output capacity of the unit. 

C-2c 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-13 
29 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-3 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-4 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-5 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8a 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(A) Quantity of each type of fuel combusted in the unit or group of 

units (as applicable) during each month of the reporting year 

(Fuel). 

C-8b 
30 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of 

each parameter. If multiple values of a parameter are obtained in 

a given month, report the arithmetic average value for the month. 

(CC) 

C-3 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of 

each parameter. If multiple values of a parameter are obtained in 

a given month, report the arithmetic average value for the month. 

(CC) 

C-4 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(C) The carbon content used in the emission calculations (including 

both valid and substitute data values). For each calendar month of 

the reporting year in which carbon content and, if applicable, 

molecular weight determination is required, report a value of 

each parameter. If multiple values of a parameter are obtained in 

a given month, report the arithmetic average value for the month. 

(CC) 

C-5 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(C) Gas molecular weight values used in the emission calculations 

(including both valid and substitute data values). For each 

calendar month of the reporting year in which carbon content 

and, if applicable, molecular weight determination is required, 

report a value of each parameter. If multiple values of a 

parameter are obtained in a given month, report the arithmetic 

average value for the month. 

C-5 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(iv)(F) The annual average HHV, when measured HHV data, rather than 

a default HHV from Table C-1 of this subpart, are used to 

calculate CH4 and N2O emissions for a Tier 3 unit, in accordance 

with §98.33(c)(1). 

C-8 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ix)(D) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

carbon-based F-factor used in Equation C-13 of this subpart. 

C-13 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ix)(E) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

annual average HHV value used in Equation C-13 of this subpart. 

C-13 
31 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

C (Stationary fuel 

combustion 

sources connected 

to certain electric 

generators 

connected to the 

local or regional 

power grid)1

§98.36(e)(2)(ix)(F) For units that combust both fossil fuel and biomass, when 

biogenic CO2 is determined according to §98.33(e)(2), report the 

total quantity of fossil fuel combusted during the reporting year. 

C-13 

E §98.56(g) Abatement technology destruction efficiency for each abatement 

technology (DF). 

 E-3a 

E §98.56(g) Abatement technology destruction efficiency for each abatement 

technology (DF). 

 E-3b 

E §98.56(g) Abatement technology destruction efficiency for each abatement 

technology (DF). 

E-3c 

E §98.56(h) Abatement utilization factor for each abatement technology (AF). E-3a 

E §98.56(h) Abatement utilization factor for each abatement technology. (AF) E-3b 

E §98.56(h) Abatement utilization factor for each abatement technology (AF). E-3c 

E §98.56(j)(4) N2O concentration per test run during performance test for each 

unit (CN2O). 

E-1 

E §98.56(j)(5) Volumetric flow rate per test run during performance test for 

each unit (Q). 

E-1 

E §98.56(j)(6) Number of test runs for each unit (n). E-1 

E §98.56(l) Fraction control factor for each abatement technology (percent of 

total emissions from the production unit that are sent to the 

abatement technology) if equation E-3c is used. (FCN) 

E-3c 

H §98.86(b)(11) Quarterly kiln-specific CKD CO2 emission factors for each kiln. H-2 

H §98.86(b)(13) Name of raw kiln feed or raw material. 

L §98.126(b)(10) 2 The fraction of the mass emitted that consists of each fluorinecontaining reactant (FERd). L-11 

L §98.126(b)(10) 2 The fraction of the mass emitted that consists of each fluorinecontaining reactant. (FERd). L-12 

L §98.126(b)(10) 2 The fraction of the mass emitted that consists of each fluorinecontaining reactant (FERd). L-13 

L §98.126(b)(11) 2 The fraction of the mass emitted that consists of the fluorinecontaining product (FEP). L-11 

L §98.126(b)(11) 2 The fraction of the mass emitted that consists of the fluorinecontaining product. (FEP) L-12 

L §98.126(b)(11) 2 The fraction of the mass emitted that consists of the fluorinecontaining product. (FEP). L-13 

L §98.126(b)(12) 2 The fraction of the mass emitted that consists of each fluorinecontaining by-product (FEBk). L-11 

L §98.126(b)(12) 2 The fraction of the mass emitted that consists of each fluorinecontaining by-product. (FEBk) L-12 

L §98.126(b)(12) 2 The fraction of the mass emitted that consists of each fluorinecontaining by-product. (FEBk) L-13 

O §98.156(d)(2) If the HFC-23 concentration measured pursuant to §98.154(l) is 

greater than that measured during the performance test that is the 

basis for the destruction efficiency (DE), report concentration 

(mass fraction) of HFC-23 at the outlet of the destruction device. 

No Equation - Used 

to calculate 

Destruction 

Efficiency 
32 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

O §98.156(d)(3) If the HFC-23 concentration measured pursuant to §98.154(l) is 

greater than that measured during the performance test that is the 

basis for the destruction efficiency (DE), report flow rate at the 

outlet of the destruction device in kg/hr. 

No Equation - Used 

to calculate 

Destruction 

Efficiency 

O §98.156(d)(4) If the HFC-23 concentration measured pursuant to §98.154(l) is 

greater than that measured during the performance test that is the 

basis for the destruction efficiency (DE), report emission rate (in 

kg/hour) calculated from the paragraphs (d)(2) and (d)(3) of this 

section. 

No Equation - Used 

to calculate 

Destruction 

Efficiency 

Q §98.176(f)(1) Measured average hourly CO2 emission rate during the test (No 

CEMS). 

No Equation - Used 

as input to method 

described in 

§98.173(b)(2)(iii). 

V §98.226(i) Abatement technology destruction efficiency (DF). V-3a 

V §98.226(i) Abatement technology destruction efficiency (DF). V-3b 

V §98.226(i) Abatement technology destruction efficiency (DF). V-3c 

V §98.226(j) Abatement utilization factor (AF). V-3a 

V §98.226(j) Abatement utilization factor (AF). V-3b 

V §98.226(j) Abatement utilization factor (AF). V-3c 

V §98.226(m)(4) N2O concentration per test run during performance test for each 

train. 

V-1 

V §98.226(m)(5) Volumetric flow rate per test run during performance test each 

train. 

V-1 

V §98.226(m)(6) Number of test runs during performance test each train. V-1 

V §98.226(p) Fraction control factor for each abatement technology (percent of 

total emissions from the production unit that are sent to the 

abatement technology) if equation V-3c is used. 

V-3c 

W 98.236(c)(1)(i) Actual count of natural gas pneumatic high bleed devices. W-1 

W 98.236(c)(1)(i) Estimated count of natural gas pneumatic high bleed devices. W-1 

W 98.236(c)(1)(ii) Actual count of natural gas pneumatic low bleed devices. W-1 

W 98.236(c)(1)(ii) Estimated count of natural gas pneumatic low bleed devices. W-1 

W 98.236(c)(1)(iii) Actual count of natural gas pneumatic intermittent bleed devices. W-1 

W 98.236(c)(1)(iii) Estimated count of natural gas pneumatic intermittent bleed 

devices. 

W-1 

W 98.236(c)(2)(i) Count of natural gas driven pneumatic pumps. W-2 

W 98.236(c)(3)(i) Total throughput of each acid gas removal unit using a meter or 

engineering estimate based on process knowledge or best 

available data. 

W-3 

W 98.236(c)(3)(ii) For Calculation Methodology 2 of §98.233(d), annual average 

fraction of CO2 content in the vent from each acid gas removal 

unit. 

W-3 
33 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(3)(iii) For Calculation Methodology 3 of §98.233(d), annual average 

volume fraction of CO2 content of natural gas into each acid gas 

removal unit. 

W-4A 

W 98.236(c)(3)(iii) For Calculation Methodology 3 of §98.233(d), annual average 

volume fraction of CO2 content of natural gas into each acid gas 

removal unit. 

W-4B 

W 98.236(c)(3)(iii) For Calculation Methodology 3 of §98.233(d), annual average 

volume fraction of CO2 content of natural gas out of each acid 

gas removal unit. 

W-4A 

W 98.236(c)(3)(iii) For Calculation Methodology 3 of §98.233(d), annual average 

volume fraction of CO2 content of natural gas out of each acid 

gas removal unit. 

W-4B 

W 98.236(c)(3)(iv) Annual quantity of CO2, that was recovered from each acid gas 

removal unit and transferred outside the facility (metric tons 

CO2e), under subpart PP of this part. 

98.233(d)(11) 

W 98.236(c)(4)(i)(A) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Glycol dehydrator feed natural gas flow rate in 

MMscfd, determined by engineering estimate based on best 

available data. 

Methodology 1 

W 98.236(c)(4)(i)(B) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Glycol dehydrator absorbent circulation pump 

type. 

Methodology 1 

W 98.236(c)(4)(i)(C) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Report whether stripper gas is used in glycol 

dehydrator. 

Methodology 1 

W 98.236(c)(4)(i)(D) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Report whether a flash tank separator is used in 

glycol dehydrator. 

Methodology 1 

W 98.236(c)(4)(i)(E) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Report type of absorbent. 

Methodology 1 

W 98.236(c)(4)(i)(F) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Total time the glycol dehydrator is operating in 

hours. 

Methodology 1 

W 98.236(c)(4)(i)(G) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Temperature of the wet natural gas (degrees 

Fahrenheit). 

Methodology 1 

W 98.236(c)(4)(i)(G) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Pressure of the wet natural gas (psig). 

Methodology 1 

W 98.236(c)(4)(i)(H) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Concentration of CO2 in wet natural gas. 

Methodology 1 

W 98.236(c)(4)(i)(H) For each glycol dehydrator with throughput greater than or equal 

to 0.4 MMscfd: Concentration of CH4 in wet natural gas. 

Methodology 1 

W 98.236(c)(4)(ii)(A) For all glycol dehydrator with throughput less than 0.4 MMscfd: 

Count of glycol dehydrators. 

W-5 
34 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(5)(i)(D) For well venting for liquids unloading, for Calculation 

Methodology 1, report the following by each tubing diameter 

group and pressure group combination within each sub-basin 

category: Average flow rate of the measured well venting (cubic 

feet per hour). 

W-7 

W 98.236(c)(5)(ii)(C) For well venting for liquids unloading, for Calculation 

Methodologies 2 and 3, report the following for each sub-basin 

category: Cumulative number of unloadings vented to the 

atmosphere. 

W-8 

W 98.236(c)(5)(ii)(C) For well venting for liquids unloading, for Calculation 

Methodologies 2 and 3, report the following for each sub-basin 

category: Cumulative number of unloadings vented to the 

atmosphere. 

W-9 

W 98.236(c)(6)(i)(B) For well completions and workovers with hydraulic fracturing, 

report the following for each sub-basin and well type (horizontal 

or vertical) combination: When using Equation W-10A, 

measured flow rate of backflow during well completion (cubic 

feet per hour). 

W-10A 

W 98.236(c)(6)(i)(D) For well completions and workovers with hydraulic fracturing, 

report the following for each sub-basin and well type (horizontal 

or vertical) combination: When using Equation W-10A, 

measured flow rate of backflow during well workover (cubic feet 

per hour). 

W-12 

W 98.236(c)(6)(i)(E) For well completions and workovers with hydraulic fracturing, 

report the following for each sub-basin and well type (horizontal 

or vertical) combination: When using Equation W-10A, total 

number of days of backflow from all wells during completions. 

W-10A 

W 98.236(c)(6)(i)(F) For well completions and workovers with hydraulic fracturing, 

report the following for each sub-basin and well type (horizontal 

or vertical) combination: When using Equation W-10A, total 

number of days of backflow from all wells during workovers. 

W-10A 

W 98.236(c)(6)(i)(G) For well completions and workovers with hydraulic fracturing, 

report the following for each sub-basin and well type (horizontal 

or vertical) combination: The amount of gas recovered to sales 

using engineering estimate based on best available data. 

W-10A 

W 98.236(c)(6)(i)(H) For well workovers with hydraulic fracturing, report the 

following for each sub-basin and well type (horizontal or 

vertical) combination: The amount of gas recovered to sales 

using engineering estimate based on best available data. 

W-10A 

W 98.236(c)(6)(ii)(A) For well completions and workovers without hydraulic 

fracturing, report the following for each sub-basin and well type 

(horizontal or vertical) combination: Total count of completions 

in calendar year. 

W-13 

W 98.236(c)(6)(ii)(B) For well completions and workovers without hydraulic 

fracturing, report the following for each sub-basin and well type 

(horizontal or vertical) combination: Total count of workovers in 

calendar year that flare gas or vent gas to the atmosphere. 

W-13 

W 98.236(c)(7)(i)(A) For blowdown vent stack emission source, for each unique 

physical volume that is blown down more than once during the 

calendar year: Total number of blowdowns for each unique 

physical volume in the calendar year. (when using Eq. W-14A) 

W-14A 
35 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(8)(i)(F) For wellhead gas-liquid separator with oil throughput greater than 

or equal to 10 barrels per day, using Calculation Methodology 1 

and 2 of 40 CFR 98.233(j), report by sub-basin category: Total 

volume of oil from all wellhead separators sent to tank(s) in 

barrels per year. 

Methodology 1 (see 

98.236j2) 

W 98.236(c)(8)(i)(F) For wellhead gas-liquid separator with oil throughput greater than 

or equal to 10 barrels per day, using Calculation Methodology 1 

and 2 of 40 CFR 98.233(j), report by sub-basin category: Total 

volume of oil from all wellhead separators sent to tank(s) in 

barrels per year. 

Methodology 2 (see 

98.233j1) 

W 98.236(c)(8)(i)(K) For wellhead gas-liquid separator with oil throughput greater than 

or equal to 10 barrels per day, using Calculation Methodology 1 

of 40 CFR 98.233(j), report by sub-basin category: Annual CO2 

gas quantities that were recovered (metric tons CO2e), for all 

wellhead gas-liquid separators or storage tanks using Calculation 

Methodology 1 of §98.233(j). 

98.233(j)(6)(i) 

W 98.236(c)(8)(ii)(A) For wells with oil production greater than or equal to 10 barrels 

per day, using Calculation Methodology 3 and 4 of 40 CFR 

98.233(j), report the following by sub-basin category: Total 

volume of sales oil from all wells (barrels per year). 

Methodology 3 and 

4 (see 98.233(j)(3) 

and (j)(4)) 

W 98.236(c)(8)(ii)(H) For wells with oil production greater than or equal to 10 barrels 

per day, using Calculation Methodology 3 and 4 of 40 CFR 

98.233(j), report the following by sub-basin category: Annual 

CO2 gas quantities that were recovered (metric tons CO2e), for 

Calculation Methodology 3 or 4 of §98.233(j). 

98.233(j)(6)(i) 

W 98.236(c)(8)(iii)(A) For wellhead gas-liquid separators and wells with throughput less 

than 10 barrels per day, using Calculation Methodology 5 of 40 

CFR 98.233(j) Equation W-15 of 40 CFR 98.233: Number of 

wellhead separators. 

W-15 

W 98.236(c)(8)(iii)(B) For wellhead gas-liquid separators and wells with throughput less 

than 10 barrels per day, using Calculation Methodology 5 of 40 

CFR 98.233(j) Equation W–15 of 40 CFR 98.233: Number of 

wells without wellhead separators. 

W-15 

W 98.236(c)(8)(iii)(G) For wellhead gas-liquid separators and wells with throughput less 

than 10 barrels per day, using Calculation Methodology 5 of 40 

CFR 98.233(j) Equation W-15 of 40 CFR 98.233: Annual CO2 

gas quantities that were recovered (metric tons CO2e), at the subbasin level for Calculation Methodology 5 of §98.233(j). 

98.233(j)(6)(i) 

W 98.236(c)(12)(ii) For flare stacks: Volume of gas sent to flare (cubic feet per year). W-19 

W 98.236(c)(12)(ii) For flare stacks: Volume of gas sent to flare (cubic feet per year). W-20 

W 98.236(c)(12)(ii) For flare stacks: Volume of gas sent to flare (cubic feet per year). W-21 

W 98.236(c)(12)(v) For flare stacks: Flare combustion efficiency. W-19 

W 98.236(c)(12)(v) For flare stacks: Flare combustion efficiency. W-21 

W 98.236(c)(13)(i)(E) For compressors with wet seals in operational mode: Reporter 

emission factor for wet seal oil degassing vents in cubic feet per 

hour (refer to Equation W-24 of 40 CFR 98.233). 

W-23 

W 98.236(c)(13)(i)(F) For compressors with wet seals in operational mode: Total time 

the compressor is operating (hours). 

W-22 

W 98.236(c)(13)(i)(F) For compressors with wet seals in operational mode: Total time 

the compressor is operating (hours). 

W-23 
36 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(13)(ii)(A) For wet and dry seal centrifugal compressors in operating mode: 

Total time the compressor is in operating mode (hours). 

W-23 

W 98.236(c)(13)(ii)(B) For wet and dry seal centrifugal compressors in operating mode: 

Reporter emission factor for blowdown vents (cubic feet per 

hour). 

W-23 

W 98.236(c)(13)(iii)(A) For wet and dry seal centrifugal compressors: Total time the 

compressor is in shutdown, depressurized mode (hours). 

W-22 

W 98.236(c)(13)(iii)(A) For wet and dry seal centrifugal compressors: Total time the 

compressor is in shutdown, depressurized mode (hours). 

W-23 

W 98.236(c)(13)(iii)(B) For wet and dry seal centrifugal compressors: Reporter emission 

factor for isolation valve emissions in shutdown, depressurized 

mode (cubic feet per hour). 

W-23 

W 98.236(c)(13)(v)(A) For centrifugal compressors in onshore petroleum and natural gas 

production: Count of compressors. 

W-25 

W 98.236(c)(14)(i)(B) For reciprocating compressors rod packing emissions with or 

without a vent in operating mode: Total time the reciprocating 

compressor is in operating mode (hours). 

W-26 

W 98.236(c)(14)(i)(B) For reciprocating compressors rod packing emissions with or 

without a vent in operating mode: Total time the reciprocating 

compressor is in operating mode (hours). 

W-27 

W 98.236(c)(14)(ii)(A) For reciprocating compressors blowdown vents not manifold to 

rod packing vents, in operating and standby pressurized mode: 

Total time the compressor is in standby, pressurized mode 

(hours). 

W-26 

W 98.236(c)(14)(ii)(A) For reciprocating compressors blowdown vents not manifold to 

rod packing vents, in operating and standby pressurized mode: 

Total time the compressor is in standby, pressurized mode 

(hours). 

W-27 

W 98.236(c)(14)(ii)(B) For reciprocating compressors blowdown vents not manifold to 

rod packing vents, in operating and standby pressurized mode: 

Emission factor for blowdown vents (cubic feet per hour). 

W-27 

W 98.236(c)(14)(iii)(A) For reciprocating compressors: Total time the compressor is in 

not operating, depressurized mode. 

W-26 

W 98.236(c)(14)(iii)(A) For reciprocating compressors: Total time the compressor is in 

not operating, depressurized mode. 

W-27 

W 98.236(c)(14)(iii)(B) For reciprocating compressors: Reporter emission factor for 

isolation valve emissions in not operating, depressurized mode. 

W-27 

W 98.236(c)(14)(v)(A) For reciprocating compressors in onshore petroleum and natural 

gas production: Count of compressors. 

W-29 

W 98.236(c)(15)(ii)(A) For equipment leaks calculated using population counts and 

factors (refer to §98.233(r)), report the following: 

For source categories 40 CFR 98.230(a)(4), (a)(5), (a)(6), (a)(7), 

and (a)(8) total count for each type of leak source in Tables W-2, 

W-3, W-4, W-5, and W-6 of this subpart for which there is a 

population emission factor, listed by major heading and 

component type. 

 W-31 

W 98.236(c)(15)(ii)(B) For equipment leaks calculated using population counts and 

factors (refer to §98.233(r)), report the following: 

For equipment leaks calculated using population counts and 

factors: For onshore production (refer to 40 CFR 98.230 

paragraph (a)(2)), total count for each type of major equipment in 

Table W-1B and Table W-1C of this subpart, by sub-basin 

category. 

 W-31 
37 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(16)(viii) For local distribution companies: Leak factor for meter/regulator 

run developed in Equation W-32 of §98.233. 

W-31 

W 98.236(c)(16)(ix) For local distribution companies: Number of miles of unprotected 

steel distribution mains. 

W-31 

W 98.236(c)(16)(x) For local distribution companies: Number of miles of protected 

steel distribution mains. 

W-31 

W 98.236(c)(16)(xi) For local distribution companies: Number of miles of plastic 

distribution mains. 

W-31 

W 98.236(c)(16)(xii) For local distribution companies: Number of miles of cast iron 

distribution mains. 

W-31 

W 98.236(c)(16)(xiii) For local distribution companies: Number of unprotected steel 

distribution services. 

W-31 

W 98.236(c)(16)(xiv) For local distribution companies: Number of protected steel 

distribution services. 

W-31 

W 98.236(c)(16)(xv) For local distribution companies: Number of plastic distribution 

services. 

W-31 

W 98.236(c)(16)(xvi) For local distribution companies:Number of copper distribution 

services. 

W-31 

W 98.236(c)(17)(ii) For each EOR injection pump blowdown: Volume of critical 

phase gas between isolation valves. 

W-37 

W 98.236(c)(17)(iii) For each EOR injection pump blowdown: Number of blowdowns 

per year. 

W-37 

W 98.236(c)(17)(iv) For each EOR injection pump blowdown: Critical phase EOR 

injection gas density. 

W-37 

W 98.236(c)(18)(i) For EOR hydrocarbon liquids dissolved CO2 for each sub-basin 

category: Volume of crude oil produced (barrels per year). 

W-38 

W 98.236(c)(18)(ii) For EOR hydrocarbon liquids dissolved CO2 for each sub-basin 

category: Amount of CO2 retained in hydrocarbon liquids (metric 

tons per barrel), under standard conditions. 

W-38 

W 98.236(c)(19)(iv) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in external fuel combustion units with a rated heat 

capacity larger than 5 mmBtu/hr, by fuel type. 

W-39A 

W 98.236(c)(19)(iv) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in external fuel combustion units with a rated heat 

capacity larger than 5 mmBtu/hr, by fuel type. 

W-39B 

W 98.236(c)(19)(iv) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in external fuel combustion units with a rated heat 

capacity larger than 5 mmBtu/hr, by fuel type. 

W-40 

W 98.236(c)(19)(vii) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in internal combustion units with a rated heat capacity 

larger than 1 mmBtu/hr or 130 horsepower, by fuel type. 

W-39A 

W 98.236(c)(19)(vii) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in internal combustion units with a rated heat capacity 

larger than 1 mmBtu/hr or 130 horsepower, by fuel type. 

W-39B 
38 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

W 98.236(c)(19)(vii) For onshore petroleum and natural gas production and natural gas 

distribution combustion emissions: Cumulative volume of fuel 

combusted in internal combustion units with a rated heat capacity 

larger than 1 mmBtu/hr or 130 horsepower, by fuel type. 

W-40 

Y §98.256(h)(5) Value of the correction. If a correction for 

CO2 emissions in 

the tail gas was used 

in Eq. Y-12, used in 

method specified in 

§98.253(f)(5) 

Y §98.256(k)(4) For delayed coking units: Mole fraction of methane in coking 

gas. 

Y-18 

Y §98.256(n)(3) For equipment leaks: Number of each type of emission source 

listed in Equation Y-21 (if using Eq. Y-21). 

Y-21 

Y §98.256(o)(4)(vi) If you did not use Equation Y-23: report the gas generation rate 

data used to estimate cumulative CH4 emissions for storage tanks 

used to process unstabilized crude oil. 

Used in methods 

specified in 

§98.253(m)(2) 

Y §98.256(o)(4)(vi) If you did not use Equation Y-23: report the tank-specific 

methane composition data used to estimate cumulative CH4 

emissions for storage tanks used to process unstabilized crude oil. 

Used in methods 

specified in 

§98.253(m)(2) 

AA §98.276(e) Default or site specific emission factor for CO2 used in equation 

AA-1. 

AA-1 

AA §98.276(e) Default or site specific emission factor for CH4 used in equation 

AA-1. 

AA-1 

AA §98.276(e) Default or site specific emission factor for N2O used in equation 

AA-1. 

AA-1 

CC §98.296(b)(10)(i) Stack gas volumetric flow rate during performance test (dscfm) 

for each manufacturing line or stack. 

CC-3 

CC §98.296(b)(10)(ii) Hourly CO2 concentration during performance test (percent CO2) 

for each manufacturing line or stack. 

CC-3 

CC §98.296(b)(10)(iii) CO2 emission factor of process vent flow from mine water for 

each manufacturing line or stack. 

CC-5 

CC §98.296(b)(10)(iv) CO2 emission mass emission rate during performance test (metric 

tons/hour) for each manufacturing line or stack. 

CC-4 

CC §98.296(b)(10)(v) Average process vent flow from mine water stripper/evaporator 

during performance test for each manufacturing line or stack. 

CC-4 

CC §98.296(b)(10)(vi) Annual process vent flow rate from mine stripper/evaporator for 

each manufacturing line or stack. 

CC-5 

II §98.356(d)(2) Cumulative volumetric biogas flow for each week that biogas is 

collected for destruction (if using weekly sampling). 

II-4 

II §98.356(d)(3) Weekly average CH4 concentration for each week that biogas is 

collected for destruction (if using weekly sampling). 

II-4 

II §98.356(d)(4) Weekly average temperature at which flow is measured for 

biogas collected for destruction (if using weekly sampling). 

II-4 
39 

Subpart 

Rule Citation in 40 

CFR Part 98 Data Element Description 

Data Element is 

used as Input to 

Equation . . . 

II §98.356(d)(5) Weekly average moisture content for each week at which flow is 

measured for biogas collected for destruction (if using weekly 

sampling). 

II-4 

II §98.356(d)(6) Weekly average pressure for each week at which flow is 

measured for biogas collected for destruction (if using weekly 

sampling). 

II-4 

1

 Stationary fuel combustion sources connected to certain electric generators connected to the local or regional power grid include stationary fuel 

combustion sources (e.g., individual units, aggregations of units, common pipes, or common stacks) subject to subpart C of Part 98 that meet the 

following criteria: (1) the stationary fuel combustion source contains at least one combustion unit connected to a fuel-fired electric generators that 

has been granted access by the Public Utilities Commission to deliver power to the local or regional electric power grid (excluding electric 

generators that are connected to combustion units subject to subpart D of Part 98); and (2) the stationary fuel combustion source is located at a 

facility for which the sum of the nameplate capacities for all such electric generators is greater than or equal to 1 megawatt electric output. 2

 Reporting of this data element will be addressed under a separate EPA rulemaking; therefore, EPA is taking no action on this data element under 

this rulemaking.