Page 1 of 25
**Subpart Q —**  **Iron and Steel Production**
The iron and steel production source category includes facilities with any of the following processes: taconite iron ore processing, integrated iron and steel manufacturing, cokemaking not colocated with an integrated iron and steel manufacturing process, direct reduction furnaces not co l located with an integrated iron and steel manufacturing process, and electric arc furnace (EAF) steelmaking not colocated with an integrated iron and steel manufacturing process. Integrated iron and steel manufacturing mean s the production of steel from iron ore or iron ore pellets. At a minimum, an integrated iron and steel manufacturing process has a basic oxygen furnace for refining molten iron into steel. Each cokemaking process and EAF process located at a facility with an integrated iron and steel manufacturing process is part of the integrated iron and steel manufacturing facility. § 98.170 Definition of the source category.

You must report GHG emissions under this subpart if your facility contains an iron and steel production proce ss and the facility meets the requirements of either §98.2(a)(1) or (2). § 98.171 Reporting threshold.

(a) You must report under subpart C of this part (General Stationary Fuel Combustion Sources) the emissions of CO § 98.172 GHGs to report.

2 ,CH 4 , andPage 2 of 25

N 2

(b) You must report CO O from each stationary combustio n unit following the requirements of subpart C except for flares. Stationary combustion units include, but are not limited to, by

- product recovery coke oven battery combustion stacks, blast furnace stoves, boilers, process heaters, reheat furnaces, anneali ng furnaces, flame suppression, ladle reheaters, and other miscellaneous combustion sources.

2 emission s from flares that burn blast furnace gas or coke oven gas according to the procedures in §98.253(b)(1) of subpart Y (Petroleum Ref ineries) of this part. When using the alternatives set forth in §98.253(b)(1)(ii)(B) and §98.253(b)(1)(iii)(C), you must use the default CO 2 emission factors for coke oven gas and blast furnace gas from Table C

– 1 to subpart C in Equations Y

– 2 and Y

– 3 of

su bpart Y. You must report CH 4 and N 2

(c) You must report process CO O emissions from flares according to the requirements in §98.33(c)(2) using the emission factors for coke oven gas and blast furnace gas in Table C

– 2 to subpart C of this part.

2 emission s from each taconite indurating furnace; basic oxygen furnace; non

- recovery coke oven battery combustion stack; coke pushing process; sinter process; EAF; decarburization vessel; and direct reduction furnace by following the procedures in this subpart. § 9 8.173 Calculating GHG emissions.Page 3 of 25 You must calculate and report the annual process CO 2 emission s from each taconite indurating furnace, basic oxygen furnace, non

- recovery coke oven battery, sinter process, EAF, decarburization vessel, and direct reduction f urnace using the procedures in either paragraph (a) or (b) of this section. Calculate and report the annual process CO 2

(a) Calculate and report under this subpart the proc ess CO emission s from the coke pushing process according to paragraph (c) of this section.

2

(b) Calculate and report under this subpart the process CO emission s by operating and maintaining CEMS according to the Tier 4 Calculation Methodology in §98.33(a)(4) and all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion Sources).

2

(1) emission s using the procedure in paragraph (b)(1) or (b)(2) of this section. Carbon mass balance method
. Calculate the annual mass emissions of CO 2 for the process as specified in paragraphs (b)(1)(i) through (b)(1)(v ii) of this section. The calculations are based on the annual mass of inputs and outputs to the process and an annual analysis of the respective weight fraction of carbon as determined according to the procedures in §98.174(b). If you have a process input or output other than CO 2 in the exhaust gas that contains carbon that is not included in Equations Q

– 1 through Q

– 7 of this section, you must account forPage 4 of 25 the carbon and mass rate of that process input or output in your calculations according to the procedur es in §98.174(b)(5). (i) For taconite indurating furnaces, estimate CO 2 emission s using Equation Q

– 1 of this section.

Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the taconite indurating furnace (metric tons).

2 (F to carbon.

s (C ) = Annual mass of the solid fuel combusted used (metric tons).

sf ) = Carbon content of the solid fuel, from the fuel analysis ( percent by weight, expressed as a decimal fraction , e.g. (F , 95% = 0.95 ).

g (C ) = Annual volume of the gaseous fuel combusted used (scf).
gf

MW = Molecular weight of the gaseous fuel (kg/kg

mole). ) = Average carbon content of the gaseous fuel, from the fuel analysis results (kg C per kg of fuel).

MVC = Molar volume conversion factor (849.5 scf per kg

- mole at standard c onditions). 0.001 = Conversion factor from kg to metric tons. (F l (C ) = Annual volume of the liquid fuel combusted used (gallons).

lf

(O) = Annual mass of greenball (taconite) pellets fed to the furnace (metric tons). ) = Carbon content of the liquid fuel, from the fuel analysis results (kg C per gallon of fuel).

(C 0 ) = Carbon content of the greenball (taconite) pellets, from the carbon analysis resultsPage 5 of 25
( percent by weight, expressed as a decimal fraction). (P) = Annual mass of fired pellets produced by the furnace (metric tons). (C p

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the fired pellets, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R

(ii) For basic oxygen process furnaces, estimate CO ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

2 emission s using Equation Q

– 2 of this section.

Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the basic oxygen furnace (metric tons).

2 (Iron) = Annual mass of molten iron charged to the furnace (metric tons). to carbon.

(C Iron
(Scrap) = Annual mass of ferrous scrap charged to the furnace (metric tons). ) = Carbon content of the molten iron, from the carbon analysis resul ts ( percent by weight, expressed as a decimal fraction).

(C Scrap

(Flux) = Annual mass of flux materials ( ) = Carbon content of the ferrous scrap, from the carbon analysis results ( percent by weight, expressed as a decima l fraction). e.g. , limestone, dolomite) charged to the furnace (metric tons).Page 6 of 25
(C Flux

(Ca rbon) = Annual mass of carbonaceous materials ( ) = Carbon content of the flux materials, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). e.g.

(C , coal, coke) charged to the furnace (metric tons).

Carbon

(Steel) = Annual mass of molten raw steel produced by the furnace (metric tons). ) = Carbon content of the carbonaceous materials, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C Steel

(Slag) = Annual mass of slag produced by the furnace (me tric tons). ) = Carbon content of the steel, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C Slag

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the slag, from the carbon analysis ( percent by weight, expressed as a decimal fraction).

(C R

(iii) For non

- recovery coke oven batteries, estimate CO ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

2 emission s using Equation Q

– 3 of this section.

Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the non

- recovery coke oven battery (metric tons).

2 (Coal) = Annual mass of coal charged to the battery (metric tons). to carbon.Page 7 of 25
(C Coal

(Coke) = Annual mass of coke produced by the battery (metric tons). ) = Carbon content of the coal, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C Coke

(R) = Annu al mass of air pollution control residue collected (metric tons). ) = Carbon content of the coke, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R

(iv) For sinter processes, estimate CO ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

2 emi ssion s using Equation Q

– 4 of this section.

Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the sinter process (metric tons).

2 (F to carbon.

g (C ) = Annual volume of the gaseous fuel combusted used (scf).
gf
MW = Molecular weight of the gaseous fuel (kg/kg

mole). ) = Carbon content of the gaseous fuel, from the fuel analysis results (kg C per kg of fuel).

MVC = Molar volume conversion factor (849.5 scf per kg

- mole at standard conditions). 0.001 = Conversion factor from kg to metric tons. (Feed) = Annual mass of sinter feed material (metric tons). (C Feed ) = Carbon content of the mixed sinter feed materials that form the bed entering thePage 8 of 25 sintering machine, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). (Sinter) = Annual mass of sinter produced (metric tons). (C Sinter

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the sinter pellets, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R

(v) For EAFs, estimate CO ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

2 emission s using Equation Q

– 5 of this section.

CO 2 = 44 12 ∗ � ( Iron ) ∗ ( C Iron ) + ( Scrap ) ∗ � C Scrap � + ( Flux ) ∗ ( C Flux ) + ( Electrode ) ∗ ( C Electrode ) + ( Carbon )

∗ ( C Carbon )

− ( Steel ) ∗ ( C Steel ) + � F g � ∗ � C gf � ∗ MW MVC ∗ 0

. 001

− ( Slag ) ∗ � C Slag �

− ( R ) ∗ ( C R ) � (Eq. Q

- 5) Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the EAF (metric tons).

2 (Iron) = Annual mass of direct reduced iron (if any) charged to the furnace (metric tons). to carbon.

(C Iron
(Scrap) = Annual mass of ferrous scrap charged to the furnace (metric tons). ) = Carbon content of the direct reduced iron, from the carbo n analysis results ( percent by weight, expressed as a decimal fraction). Formatted: Font: (Default) Arial, 9 ptPage 9 of 25
(C Scrap

(Flux) = Annual mass of flux materials ( ) = Carbon content of the ferrous scrap, from the carbon analysis results ( percent by weight, expre ssed as a decimal fraction). e.g.

(C , limestone, dolomite) charged to the furnace (metric tons).

Flux

(Electrode) = Annual mass of carbon electrode consumed (metric tons). ) = Carbon content of the flux materials, from the carbon analysis results ( percent by weight, expressed as a decima l fraction).

(C Electrode

(Carbon) = Annual mass of carbonaceous materials ( ) = Carbon content of the carbon electrode, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). e.g.

(C , coal, coke) charged to the furnace (metric tons).

Carbon

(Steel) = Annual mass of molten raw steel produced by the furnace (metric tons). ) = Carbon content of the carbonaceous materials, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C Steel

( F ) = Carbon content of the steel, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

g (C ) = Annual volume of the gaseous fuel used (scf at 60 degrees F and one atmo sphere )
. gf

( MW ) = Molecular weight of the gaseous fu el (kg/kg

mole)
. ) = Average carbon content of the gaseous fuel, from the fuel analysis results (kg C per kg of fuel)
.

( MVC ) = Molar volume conversion factor ( 836.6 scf per kg

- mole at standard conditions of 60 degrees F and one atmosphere ). ( 0.001 ) = Conversion factor from kg to metric tons. (Slag) = Annual mass of slag produced by the furnace (metric tons).Page 10 of 25
(C Slag

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the slag, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R

(vi) For decarburization vessels, estimate CO ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expre ssed as a decimal fraction).

2 emission s using Equation Q

– 6 of this section.

CO 2 = 44 12 ∗ { ( Steel ) ∗ [ ( C Steelin )

− ( C Steelout ) ]

− ( R ) ∗ ( C R ) } (Eq. Q

- 6) Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the decarburization vessel (metric tons).

2 (Steel) = Annual mass of molten steel charged to the vessel (metric tons). to carbon.

(C Steelin

(C ) = Carbon content of the molten steel before decarburization, from the carbon anal ysis results ( percent by weight, expressed as a decimal fraction).

Steelout

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the molten steel after decarburization, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R ) = Carbon content of the air pollution control residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). Formatted: Font: (Default) Arial, 9 ptPage 11 of 25
(vii) For direct reduction furnaces, estimate CO 2 emission s using Equation Q

– 7 of this section.

Where:

CO 2 = Annual CO 2 44/12 = Ratio of molecular weights, CO mass emissions from the direct reduction furnace (metric tons).

2 (F to carbon.

g (C ) = Annual volume of the gaseous fuel combusted used (scf).
gf
MW = Molecular weight of the gaseous fuel (kg/kg

mole). ) = Carbon content of the gaseous fuel, from the fuel analysis results (kg C per kg of fuel).

MVC = Molar volume conversion factor (849.5 scf per kg

- mole at standard conditions). 0.001 = Conversion factor from kg to metric tons. (Ore) = Annual mass of iron ore or iron ore pellets fed to the furnace (metric tons). (C Ore

(Ca rbon) = Annual mass of carbonaceous materials ( ) = Carbon content of the iron ore or iron ore pellets, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). e.g.

(C , coal, coke) charged to the furnace (metric tons).

Carbon

(Other) = Annual mass of other materials charged to the furnace (metric tons). ) = Carbon content of the carbonaceous materials, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).Page 12 of 25
(C Other

(Iron) = Annual m ass of iron produced (metric tons). ) = Average carbon content of the other materials charged to the furnace, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C Iron

(NM) = Annual mass of non

- metallic materials produced by the furnace (metric tons). ) = Carbon content of the iron, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C NM

(R) = Annual mass of air pollution control residue collected (metric tons). ) = Carbon content of the non

- metallic materials, from the carbon analysis results ( percent by weight, expressed as a decimal fraction).

(C R

(2) ) = Carbon content of the air pollution cont rol residue, from the carbon analysis results ( percent by weight, expressed as a decimal fraction). Site

- specific emission factor method
. Conduct a performance test and measure CO 2

(i) You must measure the process production rate or process feed rate, as applicable, during the performance test according to the procedures in §98.174(c)(5) and calculate the average rate for the test period in metric tons per hour. emission s from all exhaust stacks for the process and measure either th e feed rate of materials into the process or the production rate during the test as described in paragraphs (b)(2)(i) through (b)(2)(iv) of this section.Page 13 of 25 (ii) You must calculate the hourly CO 2 emission rate using Equation Q

– 8 of this section and determine the average hour ly CO 2 emission rate for the test.

Where:

CO 2 = CO 2
5.18 × 10 −7 = Conversion factor (metric tons/scf −% CO mass emission rate, corrected for moisture (metric tons/hr).

2 C CO )
.
2 = Hourly CO 2 concentration, dry basis (% CO 2 Q = Hourly stack gas volumetric flow rate (scfh). )
.

%H 2 (iii) You must calculate a site

- specific emission factor for the process in metric tons of CO O = Hourly moisture percentage in the stack gas.

2 per metric ton of feed or production, as applicable, by dividing the average hou rly CO 2

(iv) You must calculate CO emission rate during the test by the average hourly feed or production rate during the test.

2

(c) You must determine emissions of CO emission s for the process by multiplying the emission factor by the total amount of feed or production, as applicable, for the reporting period.

2 from the coke pushing process in mt CO 2 e by multiplying the metric tons of coal charged to the by

- product recovery and non

- recovery coke ovens during the reporting period by 0.008.Page 14 of 25
(d) If GHG emissions from a taconite indurating furnace, basic oxygen furnace, non

- recovery coke oven battery, sinter process, EAF, decarburization vessel, or direct reduction furnace are vented through a stack equipped with a CEMS that complies with the Tier 4 methodology in subpart C of this part, or through the same stack as any combustion unit or process equipment that reports CO 2 emission s using a CEMS that complies with the Tier 4 Calculation Methodology in subpart C of this part (General Stationary Fuel Combustion Sources), then the calculation methodology in paragraph (b) of this section shall not be used to calculate process emissions. The owner or operator shall report under this subpart the combined stack emissions according to the Tier 4 Calculation Methodology in §98.33(a)(4) and comply with all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion Sources).

(a) If you operate and maintain a CEMS that measures CO § 98.174 Monitoring and QA/QC requirements.

2

(b) If you determine CO emission s consistent with subpart C of this part, you must meet the monitoring and QA/QC requirements of §98.34(c).

2

(1) Except as provided in paragraph ( b)(4) of this section, determine the mass of each process input and output other than emission s using the carbon mass balance procedure in §98.173(b)(1), you must:Page 15 of 25 fuels using the same plant instruments or procedures that are used for accounting purposes (such as weigh hoppers, belt weigh feeders, weighed purchased quantities in shi pments or containers, combination of bulk density and volume measurements, etc.), record the totals for each process input and output for each calendar month, and sum the monthly mass to determine the annual mass for each process input and output. Determin e the mass rate of fuels using the procedures for combustion units in §98.34. No determination of the mass of steel output from decarburization vessels is required. (2) Except as provided in paragraph (b)(4) of this section, determine the carbon content o f each process input and output annually for use in the applicable equations in §98.173(b)(1) based on analyses provided by the supplier or by the average carbon content determined by collecting and analyzing at least three samples each year using the stan dard methods specified in paragraphs (b)(2)(i) through (b)(2)(vi) of this section as applicable. (i) ASTM C25

– 06, Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime (incorporated by reference, see §98.7) for limestone, d olomite, and slag. (ii) ASTM D5373

– 08 Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in LaboratoryPage 16 of 25 Samples of Coal (incorporated by reference, see §98.7) for coal, coke, and other carbonaceous materials. (iii) ASTM E 1915

– 07a, Standard Test Methods for Analysis of Metal Bearing Ores and Related Materials by Combustion Infrared

Absorption Spectrometry (incorporated by reference, see §98.7) for iron ore, taconite pellets, and other iron

- bearing materials. (iv) ASTM E1019

– 08, Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques (incorporated by reference, see §98.7) for iron and ferrous
scrap. (v) ASM CS

– 104 UNS No. G10460

— Alloy Digest April 1985 (Carbon Steel of Medium Carbon Content) (incorporated by reference, see §98.7); ISO/TR 15349

– 1:1998, Unalloyed steel

— Determination of low carbon content, Part 1: Infrared absorption method after combustion in an electric resistance furnace (by peak separation) (1998

– 10

– 15) First Edition (incorporated by reference, see §98.7); or ISO/TR 15349

– 3:1998, Unalloyed steel

Determination of low carbon content Part 3: Infrared absorption method after combustion in an electric resis tance furnace (with preheating) (1998

– 10

– 15) First Edition (incorporated by reference, see §98.7) as applicable for steel.Page 17 of 25 (vi) For each process input that is a fuel, determine the carbon content and molecular weight (if applicable) using the applicable me thods listed in §98.34. (3) For solid ferrous materials charged to basic oxygen process furnaces or EAFs that differ in carbon content, you may determine a weighted average carbon content based on the carbon content of each type of ferrous material and the average weight percent of each type that is used. Examples of these different ferrous materials include carbon steel, low carbon steel, stainless steel, high alloy steel, pig iron, iron scrap, and direct reduced iron. (4) If you document that a specific p rocess input or output contributes less than one percent of the total mass of carbon into or out of the process, you do not have to determine the monthly mass or annual carbon content of that input or output. (5) Except as provided in paragraph (b)(4) of this section, you must determine the annual carbon content and monthly mass rate of any input or output that contains carbon that is not listed in the equations in §98.173(b)(1) using the procedures in paragraphs (b)(1) and (b)(2) of this section. (c) If y ou determine CO 2 emission s using the site

- specific emission factor procedure in §98.173(b)(2), you must:Page 18 of 25 (1) Conduct an annual performance test that is based on representative performance ( i.e.

(2 ) ) (i) For the furnace exhaust from basic oxygen furnaces, EAFs, decarburization vessels, and direct reduction furnaces, sample the furnace exhaust for at least three complete production cycles that start when the furnace is being charge d and end after steel or iron and slag have been tapped. For EAFs that produce both carbon steel and stainless or specialty (low carbon) steel, develop an emission factor for the production of both types of steel. , performance based on normal operating conditions) of the affected process.

(ii) For the exhaust from continuously cha rged EAFs, sample the exhaust for a period spanning at least three hours. For EAFs that produce both carbon steel and stainless or specialty (low carbon) steel, develop an emission factor for the production of both types of steel. (3) For taconite indurati ng furnaces, non

- recovery coke batteries, and sinter processes, sample for at least 3 hours. (4) Conduct the stack test using EPA Method 3A at 40 CFR part 60, appendix A

– 2 to measure the CO 2 concentration, Method 2, 2A, 2C, 2D, or 2F at 40 CFR part 60, app endix A

– 1 or Method 26 at 40 CFR part 60, appendix A

– 2 to determine the stack gas volumetric flow rate, and Method 4 at 40 CFR part 60, at appendix A

– 3 to determine the moisture content of the stack gas.Page 19 of 25 (5) Determine the mass rate of process feed or proce ss production (as applicable) during the test using the same plant instruments or procedures that are used for accounting purposes (such as weigh hoppers, belt weigh feeders, combination of bulk density and volume measurements, etc.) (6) If your process op erates under different conditions as part of normal operations in such a manner that CO 2 emission s change by more than 20 percent ( e.g.

(7) If your E AF and decarburization vessel exhaust to a common emission control device and stack, you must sample each process in the ducts before the emissions are combined, sample each process when only one process is operating, or sample the combined emissions when both processes are operating and base the site

- specific emission factor on the steel production rate of the EAF. , routine changes in the carbon content of the sinter feed or change in grade of product), you must perform emission test ing and develop separate emission factors for these different operating conditions and determine emissions based on the number of hours the process operates and the production or feed rate (as applicable) at each specific different condition.

(8) The results of a performance test must include the analysis of samples, determination of emissions, and raw data.Page 20 of 25 The performance test repo rt must contain all information and data used to derive the emission factor. (d) For a coke pushing process, determine the metric tons of coal charged to the coke ovens and record the totals for each pushing process for each calendar month. Coal charged to coke ovens can be measured using weigh belts or a combination of measuring volume and bulk density.

A complete record of all measured parameters used in the GHG emissions calculations in §98.173 is required . Therefore, whenever a quality

- assured value of a required parameter is unavailable, a substitute data value for the missing parameter shall be used in the calculations as specified in the paragraphs (a) and (b) of this section. You must follow the missin g data procedures in §98.255(b) of subpart Y (Petroleum Refineries) of this part for flares burning coke oven gas or blast furnace gas. You must document and keep records of the procedures used for all such estimates. § 98.175 Procedures for estimating missing data.

(a) For each missing data Except as pr ovided in §98.174(b)(4), 100 percent data availability is required for the carbon content of inputs and outputs for facilities that estimate emissions using the carbon mass balance procedure in §98.173(b)(1) or for facilities that estimate emissions using the site

- specific emission factor procedure in §98.173(b)(2 );Page 21 of 25 100 percent data availability is required. You must repeat the test for average carbon contents of inputs and outputs according to the procedures in §98.174(b)(2). Similarly, you must repeat the test to determine the site

- specific emission factor if data on the CO 2

(b) For missing records of the monthly mass or volume of carbon

- containing inputs and outputs using the carb on mass balance procedure in §98.173(b)(1), the substitute data value must be based on the best available estimate of the mass of the input or output material from all available process data or data used for accounting purposes. emission rate, process production rate or process feed rate are missing. ).

In addition to the information required by §98.3(c), each annual report must contain the information required in paragraphs (a) through (h) of this section for each coke pushing operation; taconite indurating furnace; basic oxygen furnace;

non - r ecovery coke oven battery; sinter process; EAF; decarburization vessel; direct reduction furnace; and flare burning coke oven gas or blast furnace gas. For reporting year 2010, the information required in paragraphs (a) through (h) of this section is not r equired for decarburization vessels that are not argon

- oxygen decarburization vessels. For reporting year 2011 and each subsequent reporting year, the information in § 98.176 Data reporting req uirements.Page 22 of 25 paragraphs (a) through (h) of this section must be reported for all decarburization vessel s. (a) Unit identification number and annual CO 2

(b) Annual production quantity (in metric tons) for taconite pellets, coke, sinter, iron, and raw steel. emission s (in metric tons).

(c) If a CEMS is used to measure CO 2

(d) If a CEMS is not used to measure CO emission s, then you must report the relevant information required under §98.36 for the Tier 4 Calculation Methodology.

2

(e) If you use the carbon mass balance method in §98.173(b)(1) to determine CO emission s, then you must report for each process whether the emissions were determined using the carbon mass balance method in §98.1 73(b)(1) or the site

- specific emission factor method in §98.173(b)(2).

2

(1) The carbon content of each process input and output used to determine CO emission s, you must , ex cept as provided in §98.174(b)(4), report the following information for each proce ss:

2 (2) Whether the carbon content was determined from information from the supplier or by laboratory analysis, and if by laboratory analysis, the method used. emission s.

(3) The annual volume of each type of gaseous fuel (reported separately for each type in standard cubic feet), thePage 23 of 25 annual volume of each type of liquid fuel (reported separately for each type in gallons), and the annual mass (in metric tons) of each other process inputs and outputs used to determine CO 2

(4) The molecular weight of gaseous fuels. emission s.

(5) If you used the missing data procedures in §98.175(b), you must report how the monthly mass for each process input or output with missing data was determine d and the number of months the missing data procedures were used. (f) If you used the site

- specific emission factor method in §98.173(b)(2) to determine CO 2

(1) The measured average hourly CO emission s, you must report the following information for each process:

2

(2) The average hourly feed or production rate (as applicable) during the test (in metric tons per hour). emission rate during the test (in metric tons per hour).

(3) The site

- specific emission factor (in metric tons of CO 2

(4) The annual feed or production rate (as applicable) used to estimate annual CO per metric ton of feed or production, as applicable).

2 (g) The annual amount of coal charged to the coke ovens (in metric tons). emission s (in metric tons).Page 24 of 25
(h) For flare s burning coke oven gas or blast furnace gas, the information specified in §98.256(e) of subpart Y (Petroleum Refineries) of this part.

In addition to the records required by §98.3(g), you must retain the records spe cified in paragraphs (a) through (e) of this section, as applicable. Facilities that use CEMS to measure emissions must also retain records of the verification data required for the Tier 4 Calculating Methodology in §98.36(e). § 98.177 Records that must be retained.

(a) Records of all analyses a nd calculations conducted, including all information reported as required under §98.176. (b) When the carbon mass balance method is used to estimate emissions for a process, the monthly mass of each process input and output that are used to determine the a nnual mass , except that no determination of the mass of steel output from decarburization vessels is required
. (c) Production capacity (in metric tons per year) for the production of taconite pellets, coke, sinter, iron, and raw steel. (d) Annual operating hours for each taconite indurating furnace, basic oxygen furnace, non

- recovery coke oven battery, sinter process, electric arc furnace, decarburization vessel, and direct reduction furnace.Page 25 of 25 (e) Facilities must keep records that include a detailed explanat ion of how company records or measurements are used to determine all sources of carbon input and output and the metric tons of coal charged to the coke ovens ( e.g. , weigh belts, a combination of measuring volume and bulk density). You also must document th e procedures used to ensure the accuracy of the measurements of fuel usage including, but not limited to, calibration of weighing equipment, fuel flow meters, coal usage including, but not limited to, calibration of weighing equipment and other measurement devices. The estimated accuracy of measurements made with these devices must also be recorded, and the technical basis for these estimates must be provided.

All terms used in this subpart have the same meaning given in the Clean Air Act and subpart A of this part. § 98.178 Definitions.