Page 1 of 39

**Subpart Q —** **Iron and Steel Production §98.170**  **Definition of the source category.** 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 collocated with an integrated iron and steel manufacturing process, direct reduction furnaces not collocated with an integrated iron and steel manufacturing process, and electric arc furnace (EAF) steelmaking not collocated with an integrated iron and steel manufacturing process. Integrated iron and steel manufacturing means the production of steel from iron ore or iron ore pellets. At a minimum, an integrated iron and steel manufacturing process has a basic ox yg en 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 . **§98.171 Reporting threshold.**  You must report GHG emissions under this subpart if your facility contain s an iron and steel production process and the facility meets the requirements of either §98.2(a)(1) or (2). **§98.172 GHGs to report.**  (a) You must report under subpart C of this part (General Stationary Fuel Combustion Sources) the emissions of CO 2 , CH 4 , an d N 2 O from each stationary combustion 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, proce ss heaters, reheat furnaces, annealing furnaces, flame suppression, ladle reheaters, and other miscellaneous combustion sources.Page 2 of 39

(b) You must report CO 2 emissions from flares that burn blast furnace gas or coke oven gas according to the procedures in §98.2 53(b)(1) of subpart Y (Petroleum Refineries) 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 subp art C in Equations Y - 2 and Y - 3 of subpart Y. You must report CH 4 and N 2 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. (c) You must report process CO 2 emissions 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 b y following the procedures in this subpart. **§98.173 Calculating GHG emissions.**  You must calculate and report the annual process CO 2 emissions from each taconite indurating furnace, basic ox ygen furnace, non - recovery coke oven battery , sinter process, EAF, decarburization vessel, and direct reduction furnace using the procedures in either paragraph (a) or (b) of this section. Calculate and report the annual process CO 2 emissions from the coke pushing process according to paragraph (c) of this section. (a) Calculate and rep ort under this subpart the process CO 2 emissions 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). (b) Calculate and report under this subpart the process CO 2 emissions using the procedure in paragraph (b)(1) or (b)(2) of this section.Page 3 of 39

(1) 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)(vii) of this section. The calculations are based on the annual mass of inputs and outputs to the process and an annual anal ys is of the respective weight fraction of carbon as determined according to the procedures in §98.174(b ). If yo u 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 for the carbon and mass rate of that process input or output in your calculations according to the procedures in §98.174(b)(5). (i) For taconite indurating furnaces, estimate CO 2 emissions using Equation Q - 1 of this section.

Where: CO 2 = Annual CO 2 mass emissions from the taconite indurating furnace (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (F s ) = Annual mass of the solid fuel used (metric tons). (C sf ) = Carbon content of the solid fuel, from the fuel anal ys is (expressed as a decimal fraction). (F g ) = Annual volume of the gaseous fuel used (scf). (C gf ) = Average carbon content of the gaseous fuel, from the fuel analy sis results (kg C per kg of fuel). MW = Molecular weight of the gaseous fuel (kg/kg - mole). MVC = Molar volume conversion factor (849.5 scf per kg - mole at standard conditions). 0.001 = Conversion factor from kg to metric tons.Page 4 of 39

(F l ) = Annual volume of the liquid fuel used (gallons). (C lf ) = Carbon content of the liquid fuel, from the fuel anal ys is results (kg C per gallon of fuel). (O) = Annual mass of greenball (taconite) pellets fed to the furnac e (metric tons). (C 0 ) = Carbon content of the greenball (taconite) pellets, from the carbon analysis results (expressed as a decimal fraction). (P) = Annual mass of fired pellets produced b y the furnace (metric tons). (C p ) = Carbon content of the fired pel lets, from the carbon anal ys is results (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction). (ii) For basic ox ygen process furnaces, estimate CO 2 emissions using Equation Q - 2 of this section.

Where: CO 2 = Annual CO 2 mass emissions from the basic ox ygen furnace (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (Iron) = Annual mass of molten iron charged to the furnace (metric tons). (C Ir on) = Carbon content of the molten iron, from the carbon anal ys is results (expressed as a decimal fraction). (Scrap) = Annual mass of ferrous scrap charged to the fur nace (metric tons).Page 5 of 39

(C Scrap ) = Carbon content of the ferrous scrap, from the carbon anal ys is results (expressed as a decimal fraction). (Flux) = Annual mass of flux materials (e.g., limestone, dolomite) charged to the furnace (metric tons). (C Flux) = Carbo n content of the flux materials, from the carbon anal ys is results (expressed as a decimal fraction). (Carbon) = Annual mass of carbonaceous materials (e.g., coal, coke) charged to the furnace (metric tons). (C Carbon) = Carbon content of the carbonaceous materials, from the carbon analy sis results (expressed as a decimal fraction). (Steel) = Annual mass of molten raw steel produced by the furnace (metric tons). (C Steel ) = Carbon content of the steel, from the carbon anal ys is results (expressed as a decimal f raction). (Slag) = Annual mass of slag produced b y the furnace (metric tons). (C Slag) = Carbon content of the slag, from the carbon anal ys is (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction) (iii) For non - recovery

coke oven batteries, estimate CO 2 emissions using Equation Q - 3 of this section.

Where:Page 6 of 39

CO 2 = Annual CO 2 mass emissions from the non - recovery coke oven battery

(metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (Coal) = Annual mass of coal charged to the battery (metric tons). (C Coal) = Carbon content of the coal, from the carbon anal ys is results (expressed as a decimal fraction). (Coke) = Annual mass of coke produced b y the battery (metric tons). (C Coke) = Carbon content of the coke, from the carbon anal ys is results (expressed as a decimal fraction). (R) = Annual mass of air pollution control resi due collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction) (iv) For sinter processes, estimate CO 2 emissions using Equation Q - 4 of this section.

Where: CO 2 = Annual CO 2 mass emissions from the sinter process (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (F g ) = Annual volume of the gaseous fuel used (scf). (C gf ) = Carbon content of the gaseous fuel, from the fuel analy sis results (kg C per kg of fuel). MW = Molecular weight of the gaseous fuel (kg/kg - mole). MVC = Molar volume conversion factor (849.5 scf per kg - mole at standard conditions). 0.001 = Conversion factor from kg to metric tons.Page 7 of 39

(Feed) = Annual mass of sinter feed material (metri c tons). (C Feed) = Carbon content of the mixed sinter feed materials that form the bed entering the sintering machine, from the carbon anal ys is results (expressed as a decimal fraction). (Sinter) = Annual mass of sinter produced (metric tons). (C Sinter) = Carbon content of the sinter pellets, from the carbon anal ys is results (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction). (v) For EAFs, estimate CO 2 emissions using Equation Q - 5 of this section.

= 44 12 ∗ ( ) ∗ ( ) + ( ) ∗ + ( ) ∗ ( ) + ( ) ∗ ( ) + ( ) ∗ ( ) − ( ) ∗ ( ) + ∗ ∗ ∗ 0 . 001 − ( ) ∗ − ( ) ∗ ( ) (Eq. Q - 5) Where: CO 2 = Annual CO 2 mass emissions from the EAF (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (Iron) = Annual ma ss of direct reduced iron (if any) charged to the furnace (metric tons). (C Ir on) = Carbon content of the direct reduced iron, from the carbon anal ys is results (expressed as a decimal fraction). (Scrap) = Annual mass of ferrous scrap charged to the furnace (metric tons). (C Scrap ) = Carbon content of the ferrous scrap, from the carbon anal ys is results (expressed as a decimal fraction).Page 8 of 39

(Flux) = Annual mass of flux materials ( e.g., limestone, dolomite) charged to the furnace (metric tons). (C Flux) = Carbon content of the flux materials, from the carbon anal ys is results (expressed as a decimal fraction). (Electrode) = Annual mass of carbon electrode consumed (metric tons). (C Electrode) = Carbon content of the carbon electrode, from the carbon anal ys is results (e xpressed as a decimal fraction). (Carbon) = Annual mass of carbonaceous materials ( e.g., coal, coke) charged to the furnace (metric tons). (C Carbon) = Carbon content of the carbonaceous materials, from the carbon analysis results (expressed as a decimal fraction). (Steel) = Annual mass of molten raw steel produced by the furnace (metric tons). (C Steel ) = Carbon content of the steel, from the carbon anal ys is results (expressed as a decimal fraction). (F g ) = Annual volume of the gaseous fuel used (scf at 60 degrees F and one atmosphere). (C gf ) = Average carbon content of the gaseous fuel, from the fuel analy sis results (kg C per kg of fuel). (MW) = Molecular weight of the gaseous fuel (kg/kg - mole). (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 b y the furnace (metric tons).Page 9 of 39

(C Slag) = Carbon content of the slag, from the carbon anal ys is results (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction). (vi) For decar

burization vessels, estimate CO 2 emissions using Equation Q - 6 of this section.

Where: CO 2 = Annual CO 2 mass emissions from the decarburization vessel (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (Steel) = Annual mass of molten steel charged to the vessel (metric tons). (C Steelin) = Carbon content of the molten steel before decarburization, from the carbon anal ys is results (expressed as a decimal fraction). (C Steelout) = Carbon content of the molten steel after decarburization, from the carbon anal ys is results (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction). (vii) For direct reduction furnaces, estimate CO 2 emissions using Equation Q - 7 of this section.Page 10 of 39

Where: CO 2 = Annual CO 2 mass emissions from the direct reduction furnace (metric tons). 44/12 = Ratio of molecular weights, CO 2 to carbon. (F g ) = Annual volume of the gaseous fuel used (scf). (C gf ) = Carbon content of the gaseous fuel, from the fuel analy sis results (kg C per kg of fuel). MW = Molecular weight of the gaseous fuel (kg/kg - mole). MVC = Molar volume conversion factor (849.5 scf per kg - mo le 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) = Carbon content of the iron ore or iron ore pellets, from the carbon anal ys is result s (expressed as a decimal fraction). (Carbon) = Annual mass of carbonaceous materials (e.g., coal, coke) charged to the furnace (metric tons). (C Carbon) = Carbon content of the carbonaceous materials, from the carbon analysis results (expressed as a decimal fraction). (Other) = Annual mass of other materials charged to the furnace (metric tons). (C Other) = Average carbon content of the other materials charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction). (Iron) = Annual mass of iron produced (metric tons).Page 11 of 39

(C Ir on) = Carbon content of the iron, from the carbon anal ys is results (expressed as a decimal fraction). (NM) = Annual mass of non - metallic materials produced b y the furnace (metric tons). (C NM ) = Carbon content of the non - metallic materials, from the carbon analysis results (expressed as a decimal fraction). (R) = Annual mass of air pollution control residue collected (metric tons). (C R) = Carbon content of the air pollution control residue, from the carbon anal ys is results (expressed as a decimal fraction). (2) Site -specific emission factor method. Conduct a performance test and measure CO 2 emissions from all exhaust stacks for the process and measure either the 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. (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. (ii) You must calculate the hourly CO 2 emission rate using Equation Q - 8 of this section and determine the average hourly CO 2 emission rate for the test.

Where: CO 2 = CO 2 mass emission rate, corrected for moisture (metric tons/hr). 5.18 × 10 −7 = Conversion factor (metric tons/scf −% CO 2 ). C CO2 = Hourly

CO 2 concentration, dry

basis (% CO 2 ). Q = Hourl y stack gas volumetric flow rate (scfh).Page 12 of 39

%H 2 O = Hourl y moisture percentage in the stack gas. (iii) You must calculate a site - specific emission factor for the process in metric tons of CO 2 per metric ton of feed or production, as applicable, b y dividing the average hourl y CO 2 emission rate during the test by the average hourl y feed or production rate during the test. (iv) You must calculate CO 2 emissions for the process b y multiplying the emission factor by the total amount of feed or production, as applicable, for the reporting period. (c) You must determine emissions of CO 2 from the coke pushing process in mtCO 2 e by multiplying the metric tons of coal charged to the by-product recovery and non - recovery

coke ovens during the reporting period b y 0.008. (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 comb ustion unit or process equipment that reports CO 2 emissions 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 compl y with all associated requirements for Ti er 4 in subpart C of this part (General Stationary Fuel Combustion Sources). **§98.174 Monitoring and QA/QC requirements.**  (a) If you operate and maintain a CEMS that measures CO 2 emissions consistent with subpart C of this part, you must meet the monitoring and QA/QC requirements of §98.34(c).Page 13 of 39

(b) If you determine CO 2 emissions using the carbon mass balance procedure in §98.173(b)(1), you must: (1) Except as provided in paragraph (b)(4) of this section, determine the mass of each process input and output other than 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 sh ipments 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. Determine 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 anal ys es provided by the supplier or by

the average carbon content determined by collecting and anal yz ing 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 Anal ys is of Limestone, Quicklime, and Hydrated Lime (incorporated by reference, see §98.7) for limestone, dolomite, and slag. (ii) ASTM D5373 - 08 Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in L aboratory Samples of Coal (incorporated by reference, see §98.7) for coal, coke, and other carbonaceous materials.Page 14 of 39

(iii) ASTM E 1915 - 07a, Standard Test Methods for Analy sis of Metal Bearing Ores and Related Materials b y 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 Ox ygen in Steel, Iron, Nickel, and Cobalt Alloys b y Various Combustion and Fusion Techniques (incorporated b y 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 b y reference, see §98.7); I SO/TR 15349 - 1:1998, Unalloyed steel

—Determination of low carbon content, Part 1: Infrared absorption method after combustion in an electric resistance furnace (b y 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 b y reference, see §98.7) as applicable for steel. (vi) For each process input that is a fuel, determine the carbon content and molecular weight (if applicable) using the applicable methods 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 allo y steel, pig iron, iron scrap, and direct reduced iron.Page 15 of 39

(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 yo u determine CO 2 emissions using the site - specific emission factor procedure in §98.173(b)(2), you must: (1) Conduct an annual performance test that is based on representative performance (i.e., performance based on normal operating conditions) of the affec ted process. (2)(i) For the exhaust from basic ox ygen 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 charged 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 ty pes of steel. (ii) For the exhaust from continuously charged 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 indurating furnaces, n on - 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, appendix A - 1Page 16 of 39

or M ethod 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. (5) Determine the mass rate of process feed or process 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 operates under different conditions as part of normal operations in such a manner that CO 2 emissions change b y more than 20 percent (e.g., routine changes in the carbon content of the sinter feed or change in grade of product), yo u must perform emission testing 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. (7) If your EAF 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 onl y 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. (8) The results of a performance test must include the anal ys is of samples, determination of emissions, and raw data. The performance test report 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 toPage 17 of 39

coke ovens can be measured using weigh belts or a combination of measuring volume and bulk density . **§98.175 Procedures for estimating missing data.**  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 missing data proced ures 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. (a) Except as provided 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 facilities that estimate emissions using the site - specific emission factor proce dure in §98.173(b)(2). (b) For missing records of the monthly mass or volume of carbon - containing inputs and outputs using the carbon mass balance procedure in §98.173(b)(1), the substitute data value must be based on the best available estimate of the mas s of the input or output material from all available process data or data used for accounting purposes. **§ 98. 176**  **Data reporting requirements.** In addition to the information required b y § 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 oxyg en furnace; non - recovery coke oven battery ; sinter process; EAF; decarburiz ation vessel; direct reduction furnace; and flare burning cokePage 18 of 39

oven gas or blast furnace gas. For reporting ye ar 2010, the information required in paragraphs (a) through (h) of this section is not required for decarburization vessels that are not argon - ox ygen decarburization vessels. For reporting year 2011 and each subsequent reporting year, the information in paragraphs (a) through (h) of this section must be reported for all decarburization vessels.(a) Unit identification number and annual CO 2 emissions (in metric tons). (b) If a CEMS is used to measure CO 2 emissions, then you must report the annual production quantity

for the production unit (in metric tons) for taconite pellets, coke, sinter, iron, and raw steel. (c) If a CEMS is used to measure CO 2 em issions, then you must report the relevant information required under § 98. 36 for the Tier 4 Calculation Methodology . (d) If a CEMS is not used to measure CO 2 emissions, then you must report for each process whether the emissions were determined using the carbon mass balance method in § 98. 173(b)(1) or the site - specific emission factor method in § 98. 173(b)(2). (e) If you use the carbon mass balance method in § 98. 173(b)(1) to determine CO 2 emissions, you must, except as provided in § 98. 174(b)(4), report the following information for each process: (1) Reserved . (2) Whether the carbon content was determined from information from the supplier or by laboratory

anal ys is, and if by

laboratory

anal ys is, the method used. (3) Reserved . (4) Reserved .Page 19 of 39

(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 determined and the number of months the missing data procedures were used. (6) The information specified in paragraphs (e)(6)(i) through (vi) of this section aggregated for all process units for which CO 2 emissions were determined using the mass balance method in § 98.173(b)(1), except as provided in § 98.174(b)(4). (i) The annual mass (metric tons) of all gaseous, liquid , and solid fuels (combined) used in process units for which CO 2 emissions were determined using Equations Q - 1 through Q - 7 of § 98.173 , calculated as specified in Equation Q - 9 of this section.

= ∑ , ∗ ∗ 0 . 001 + , ∗ , ∗ 0 . 001 + , (Eq. Q - 9) Where: Fuel = Annual mass of all gaseous, liquid, and solid fuels used in process units

(metric tons). n = Number of process units where fuel is used. F g,i = Annual volume of gaseous fuel combusted (“ (F g)” in Equations Q - 1, Q - 4 and

Q - 7 of this section) for each process (scf). MW i = Molecular weight of gaseous fuel used in each process (kg/kg - mole). MVC = Molar volume conversion factor at standard conditions, as defined in § 98.6.

Use 849.5 scf per kg mole if you select 68 °F as s tandard temperature and 836.6 scf per kg mole if you select 60 °F as standard temperature. F l,i = Annual volume of the liquid fuel combusted (“ (F l)” included in Equation Q - 1

of this section) for each process unit (gallons). F s,i = Annual mass of the solid fuel combusted (“ (F s )” in Equation Q - 1 of this

section) for each process unit (metric tons). ρ l,i = Density of the liquid fuel (kg/gallon). 0.001 = Conversion factor from kg to metric tons. (ii) The annual mass (metric tons) of all non - fuel material input s (combined) specified in Equations Q - 1 through Q - 7 of § 98.173 , calculated as specified in Equation Q - 10 of this section.Page 20 of 39

= ∑ + + + + + +

+ + + + h (Eq. Q - 10) Where: NFI = Annual mass of all non - fuel inputs (to all process unit ty pes) specified in Equations Q - 1 through Q - 7 of § 98.173 (metric tons). n = Number of process units, all process types. O = Annual mass of greenball (taconite) pellets fed to the taconite furnace(s)

(metric tons). Iron = Annual mass of molten iron charged to the basic oxygen furnace(s) plus

annual mass of direct reduced iron charged to the EAF(s) (metric tons). Scrap = Annual mass of ferrous scrap charged to the basic oxygen furnace(s) and

EAF(s) (metric tons). Flux = Annual mass of flux materials charged to the basic oxygen furnace(s) and

EAF(s) (metric tons). Carbon = Annual mass of carbonaceous materials (e.g., coal, coke) charged to the basic

oxygen furnace(s), EAF(s), and direct reduction furnace(s) (metric tons). Coal = Annual mass of coal charged to the coke oven battery(s) (metric tons). Feed = Annual mass of sinter feed material charged to the sinter process(es) (metric

tons). Electrode = Annual mass of carbon electrode consumed in the EAF(s) (metric tons). Steel in = Annual mass of molten steel charged to the decarburization vessels (metric

tons). Ore = Annual mass of iron ore or iron ore pellets fed to the direct reduction

furnace(s) (metric tons). Other = Annual mass of other materials charged to the direction reduction furnace(s)

(metric tons). (iii) The annual mass (metric tons) of all solid and liquid products and by products (combined) specified in Equations Q - 1 through Q - 7 of § 98.173 , calculated as specified in Equ ation Q - 11 of this section.

= ∑ ( + + + + + + + ) ( Eq. Q - 11) Where:Page 21 of 39

Products = Annual mass of all solid and liquid products and by- products (from all

process units) specified in Equations Q - 1 through Q - 7 of § 98.173 (metric tons) . n = Number of process units, all ty pes. P = Annual mass of fired pellets produced b y the taconite furnace (metric tons). R = Annual mass of air pollution control residue from all process units (metric

tons). Steel out = Annual mass of steel produced b y the basic ox yge n furnace(s), EAF(s) and

decarburization vessel(s) (metric tons). Slag = Annual mass of slag produced b y the basic ox ygen furnace(s) and EAF(s)

(metric tons). Coke = Annual mass of coke produced b y the non - recovery coke batteries (metric tons). Sinter = Annual mass of sinter produced from the sinter process(es) (metric tons). Iron = Annual mass of iron produced from the direct reduction furnace (metric

tons). NM = Annual mass of non - metallic materials produced by the direct reduction furnace (metric tons). (iv) The weighted average carbon content of all gaseous, liquid, and solid fuels (combined) included in Equation Q - 9 of this section, calculated as specified in Equation Q - 12 of this section.

= ∑ ( , ∗ ∗ , ∗ . , ∗ , ∗ . , ∗ ) ( Eq. Q - 12) Where: CF avg = Weighted average carbon content of all gaseous, liquid, and solid fuels

included in Equation Q - 9 of this section (weight fraction). n = Number of gaseous, liquid, and sol id fuel input s to each process unit as used

in Equation Q - 9. C gf,i = Average carbon content of the gaseous fuel used in each process, from the

fuel anal ys is results (kg C per kg of fuel). C lf,i = Carbon content of the liquid fuel used in each process, fro m the fuel anal ys is

results (kg C per gallon of fuel.Page 22 of 39

C sf = Carbon content of the solid fuel used in each process, from the fuel anal ys is

(expressed as a decimal fraction, e.g., 95% = 0.95). Fuel = Annual mass of all gaseous, liquid, and solid fuels used in process units

(metric tons), as calculated in Equation Q - 9. (v) The weighted average carbon content of all non - fuel inputs to all process units (combined) included in Equation Q - 10 of this section, calculated as specified in Equation Q - 13 of this sectio n.

= ∑ ∗ (Eq. Q - 13) Where: CI avg = Weighted average carbon content of all non - fuel inputs to all process units

included in Equation Q - 10 of this section (weight fraction). n = Number of non - fuel inputs to all process units as used in Equation Q - 10. NFI i = Annual mass of each non - fuel input used in Equation Q - 10 (metric tons). C NFIi = Average carbon content of each non - fuel input used in Equation Q - 10

(expressed as a decimal fraction). NFI = Total of all non - fuel input s to all process units (metric tons). (vi) The weighted average carbon content of all solid and liquid products and by products from all process units (combined) included in Equation Q - 11 of this section, calculated as specified in Equation Q - 14 of this se ction.

= ∑ ∗ (Eq. Q - 14) Where: CP avg = Weighted average carbon content of all solid and liquid products and

by products from all process units (weight fraction). n = Number of products and by products fro m each process unit as used in Equation Q - 11 of this section.Page 23 of 39

Producti = Annual mass of each product or b yproduct used in Equation Q - 11 of this

section (metric tons). C p,i = Average carbon content of each product or b yp roduct used in Equation Q - 11

of this section (expressed as a decimal fraction). Products = Mass of all products and by products from all process units, calculated in Equation Q - 11 of this section (metric tons). (f) If you used the site - specific emission factor method in § 98. 173(b)(2) to deter mine CO 2 emissions, you must report the following information for each process: (1) The measured average hourly CO 2 emission rate during the test (in metric tons per hour). (2) Reserved . (3) Reserved . (4) Reserved . (g) Reserved . (h) For flares burning coke oven gas or blast furnace gas, the information specified in § 98. 256(e) of subpart Y (Petroleum Refineries) of this part. **§ 98. 177**  **Records that must be retained.** In addition to the records required b y § 98. 3(g), you must retain the records specified in paragraphs (a) through ( f ) 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). (a) Records of all anal ys es and calculations conducted, including all information reported as required under § 98. 176.Page 24 of 39

(b) When the carbon mass balance method is used to estimate emissions for a process, the monthly mass of each process input and output th at are used to determine the annual mass, except that no determination of the mass of steel output from decarburization vessels is required. (c) Production capacity (in metric tons per ye ar) for the production of taconite pellets, coke, sinter, iron, and raw steel. (d) Annual operating hours for each taconite indurating furnace, basic oxyg en furnace, non - recovery

coke oven battery , sinter process, electric arc furnace, decarburization vessel, and direct reduction furnace. (e) Facilities must keep records th at include a detailed explanation 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 densi ty). You also must document the 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 e quipment 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. (f) Verification software records . You must keep a record of the fil e generated by the verification software specified in § 98.5(b) for the applicable data specified in paragraphs (f)(1) through ( 9 ) of this section. Retention of this file satisfies the recordkeeping requirement for the data in paragraphs (f)(1) through ( 9 ) of this section. (1) The data in paragraphs (f)(1)(i) through (f)(1) (xxv) of this section for each applicable taconite indurating furnace for which the carbon mass balance method of reporting is used . (i) Annual mass of each solid fuel (metric tons) (Equation Q - 1 of § 98.173 ).Page 25 of 39

(ii) Carbon content of each solid fuel, from the fuel anal ys is (expressed as a decimal fraction) (Equation Q - 1). (iii) Annual volume of each gaseous fuel (scf) (Equation Q - 1). (iv) Average carbon content of each gaseous fuel, from the fuel anal ys is results (kg C per kg of fuel) (Equation Q - 1). (v) Molecular weight of each gaseous fuel (kg/kg - mole) (Equation Q - 1). (vi) Annual volume of each liquid fuel (gallons) (Equation Q - 1). (vii) Carbon content of each liquid fuel, from the fuel analysis results (kg C per gallon of fuel) (Equation Q - 1). (viii) Annual mass of the greenball (taconite) pellets fed to the furnace (metric tons) (Equation Q - 1). (ix) Carbon content of the greenball (taconite) pellets, from the carbon analysis results (expre ssed as a decimal fraction) (Equation Q - 1). (x) Annual mass of fired pellets produced b y the furnace (metric tons) (Equation Q - 1). (xi) Carbon content of the fired pellets, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 1). (xii) Annual mass of air pollution control residue collected (metric tons) (Equation Q - 1). (xiii) Carbon content of the air pollution control residue, from the carbon analysis results (expressed as a decimal fraction) (Equation Q - 1). (xiv) Annual mass of e ach other solid input containing carbon fed to each furnace (metric tons) (Equation Q - 1). (xv) Carbon content of each other solid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 1).Page 26 of 39

(xvi) Annual mass of each other solid output containing carbon produced by each furnace (metric tons) (Equation Q - 1). (xvii) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 1). (xviii) Annual mass of each other gaseous input containing carbon fed to each furnace (metric tons) (Equation Q - 1). (xix) C arbon content of each other gaseous input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 1). (xx) Annual mass of each other gaseous output containing carbon produced by each furnace (metric tons) (Equation Q - 1). (xxi) C arbon content of each other gaseous output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 1). (xxi i ) Annual mass of each other liquid input containing carbon fed to each furnace (metric tons) (Equation Q - 1). (xx iii ) Carbon content of each other liquid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 1). (xx iv) Annual mass of each other liquid output containing carbon produced by each furnace (metric tons) (Equation Q - 1). (xxv) Carbon content of each other liquid output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 1). (2) The data in paragraphs (f)(2)(i) through (xxvi) of this section for each applicable basic oxygen process furnace for which the carbon mass balance method of reporting is used .Page 27 of 39

(i) Annual mass of molten iron charged to the furnace (metric tons) (Equation Q - 2 of § 98.173 ). (ii) Carbon content of the molten iron charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 2). (iii) Annual mass of ferrous scrap charged to the furnace (metric tons) (Equation Q - 2). (iv) Carbon c ontent of the ferrous scrap charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 2). (v) Annual mass of the flux materials (e.g., limestone, dolomite) charged to the furnace (metric tons) (Equation Q - 2). (v i) Carbon content of the flux materials charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 2). (vii) Annual mass of the carbonaceous materials (e.g., coal, coke) charged to the furnace (metric tons) (Equation Q - 2). (viii) Carbon content of the carbonaceous materials charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 2). (ix) Annual mass of molten raw steel produced b y the furnace (metric tons) (Equation Q 2). (x) Carbon content of the steel produced b y the furnace, from the carbon analysis results (expressed as a decimal fraction) (Equation Q - 2). (xi) Annual mass of slag produced b y the furnace (metric tons) (Equation Q - 2). (xii) Carbon content of the slag produced by the furnace, from the carbon analysis (expressed as a decimal fraction) (Equation Q - 2).Page 28 of 39

(xiii) Annual mass of air pollution control residue collected for the furnace (metric tons) (Equation Q - 2). (xiv) Carbon content of the air pollution control residue collected for the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 2). (xv) Annual mass of each other solid input containing carbon fed to each furnace (metric tons) (Equation Q - 2). (xvi) Carbon content of each other solid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 2). (xvii) Annual mass of each other solid output containing carbon produced by each furnace (metric tons) (Equation Q - 2). (xviii) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 2). (xix) Annual mass of each other gaseous input containing carbon fed to each furnace (metric tons) (Equation Q - 2). (xx) C arbon content of each other gaseous input c ontaining carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 2). (xxi) Annual mass of each other gaseous output containing carbon produced by each furnace (metric tons) (Equation Q - 2). (xxii) C arbon content of each other gaseous output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 2). (xx iii ) Annual mass of each other liquid input containing carbon fed to each furnace (metric tons) (Equation Q - 2).Page 29 of 39

(xx iv) Carbon content of each other liquid in put containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 2). (xxv) Annual mass of each other liquid output containing carbon produced by each furnace (metric tons) (Equation Q - 2). (xxvi) Carbon content of each other liquid output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 2). (3) The data in paragraphs (f)(3)(i) through (xviii ) of this section for each applicable non recovery coke oven battery for which the carbon mass balance method of reporting is used . (i) Annual mass of coal charged to the battery (metric tons) (Equation Q - 3 of § 98.173 ). (ii) Carbon content of the coal, from the carbon analy sis results (expressed as a decimal fraction) (Equation Q - 3). (iii) Annual mass of coke produced b y the battery (metric tons) (Equation Q - 3). (iv) Carbon content of the coke, from the carbon analysis results (expressed as a decimal fraction) (Equation Q - 3). (v) Annual mass of air pollution control residue collected (metric tons) (Equation Q - 3). (vi) Carbon content of the air pollution control residue, from the carbon analy sis results (expressed as a decimal fraction) (Equation Q - 3). (vii) Annual mass of each other solid input containing carbon fed to each battery (metric tons) (Equation Q - 3). (viii) Carbon content of each other solid input containing carbon fed to each battery (expressed as a decimal fraction) (Equation Q - 3). (ix) Annual mass of each other solid output containing carbon produced b y each battery (metric tons) (Equation Q - 3).Page 30 of 39

(x) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 3). (xi) Annual mass of each other gaseous input containing carbon fed to each battery (metric tons) (Equation Q - 3). (xii) C arbon content of each o ther gaseous input containing carbon fed to each battery (expressed as a decimal fraction) (Equation Q - 3). (xi ii ) Annual mass of each other gaseous output containing carbon produced by each battery (metric tons) (Equation Q - 3). (x iv) C arbon content of each other gaseous output containing carbon produced by each battery (expressed as a decimal fraction) (Equation Q - 3). (xv) Annual mass of each other liquid input containing carbon fed to each battery (metric tons) (Equation Q - 3). (xvi) Carbon content of each other liquid input containing carbon fed to each battery (expressed as a decimal fraction) (Equation Q - 3). (xvii ) Annual mass of each other liquid output containing carbon produced by each battery (metric tons) (Equation Q - 3). (xviii ) Carbon content of each other liquid output containing carbon produced by each battery (expressed as a decimal fraction) (Equation Q - 3). (4) The data in paragraphs (f)(4)(i) through (xxi) of this section for each applicable sinter process for which the carbon mass balance method of reporting is used . (i) Annual volume of the gaseous fuel (scf) (Equation Q - 4 of § 98.173 ). (ii) Carbon content of the gaseous fuel, from the fuel anal ys is results (kg C per kg of fuel) (Equation Q - 4).Page 31 of 39

(iii) Molecular weight of th e gaseous fuel (kg/kg - mole) (Equation Q - 4). (iv) Annual mass of sinter feed material (metric tons) (Equation Q - 4). (v) Carbon content of the mixed sinter feed materials that form the bed entering the sintering machine, from the carbon anal ys is results (exp ressed as a decimal fraction) (Equation Q - 4). (vi) Annual mass of sinter produced (metric tons) (Equation Q - 4). (vii) Carbon content of the sinter pellets, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 4). (viii) Annual mass of air pollution control residue collected (metric tons) (Equation Q - 4). (ix) Carbon content of the air pollution control residue, from the carbon analy sis results (expressed as a decimal fraction) (Equation Q - 4). (x) Annual mass of each other solid input containing carbon fed to each sinter process (metric tons) (Equation Q - 4). (xi) Carbon content of each other solid input containing carbon fed to each sinter process (expressed as a decimal fraction) (Equation Q - 4). (xii) Annual mass of each other sol id output containing carbon produced by each sinter process (metric tons) (Equation Q - 4). (xiii) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 4). (xiv) Annual mass of each other gaseous input co ntaining carbon fed to each sinter process (metric tons) (Equation Q - 4). (xv) C arbon content of each other gaseous input containing carbon fed to each sinter process (expressed as a decimal fraction) (Equation Q - 4).Page 32 of 39

(xvi) Annual mass of each other gaseous output containing carbon produced by each sinter process (metric tons) (Equation Q - 4). (xvii) C arbon content of each other gaseous output containing carbon produced b y each sinter process (expressed as a decimal fraction) (Equation Q - 4). (xviii ) Annual ma ss of each other liquid input containing carbon fed to each sinter process (metric tons) (Equation Q - 4). (x ix) Carbon content of each other liquid input containing carbon fed to each sinter process (expressed as a decimal fraction) (Equation Q - 4). (xx) Annual mass of each other liquid output containing carbon produced by each sinter process (metric tons) (Equation Q - 4). (xxi) Carbon content of each other liquid output containing carbon produced by each sinter process (expressed as a decimal fraction) (Equation Q - 4). (5) The data in paragraphs (f)(5)(i) through (xxxi) of this section for each applicable electric arc furnace for which the carbon mass balance method of reporting is used . (i) Annual mass of direct reduced iron (if any) charged to the furnace (m etric tons) (Equation Q - 5 of § 98.173 ). (ii) Carbon content of the direct reduced iron, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 5) (iii) Annual mass of ferrous scrap charged to the furnace (metric tons) (Equation Q - 5). (iv) Carbon content of the ferrous scrap, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 5). (v) Annual mass of flux materials (e.g., limestone, dolomite) charged to the furnace (metric tons) (Equation Q - 5).Page 33 of 39

(vi) Carbon content of the flux materials, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 5). (vii) Annual mass of carbon electrode consumed (metric tons) (Equation Q - 5). (viii) Carbon content of the carbon electrode, from the carbon anal ysis results (expressed as a decimal fraction) (Equation Q - 5). (ix) Annual mass of carbonaceous materials (e.g., coal, coke) charged to the furnace (metric tons) (Equation Q - 5). (x) Carbon content of the carbonaceous materials, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 5). (xi) Annual mass of molten raw steel produced b y the furnace (metric tons) (Equation Q 5). (xii) Carbon content of the steel, from the carbon analysis results (expressed as a decimal fraction) (Equation Q - 5). (xiii) Annual volume of the gaseous fuel (scf at 60F and 1 atm) (Equation Q - 5). (xiv) Average carbon content of the gaseous fuel, from the fuel anal ys is results (kg C per kg of fuel) (Equation Q - 5). (xv) Molecular weight of the gaseous fuel (kg/kg - mole) (Equation Q - 5). (xvi) Annual mass of slag produced b y the furnace (metric tons) (Equation Q - 5). (xvii) Carbon content of the slag, from the carbon anal ys is (expressed as a decimal fraction) (Equation Q - 5). (xviii) Annual mass of air pollution control residue collected (metric tons) (Equation Q 5).Page 34 of 39

(xix) Carbon content of the air pollution control residue, from the carbon analy sis results (expressed as a decimal fraction) (Equation Q - 5). (xx) Annual mass of each other solid input containing carb on fed to each furnace (metric tons) (Equation Q - 5). (xxi) Carbon content of each other solid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 5). (xxii) Annual mass of each other solid output containing carbon prod uced by each furnace (metric tons) (Equation Q - 5). (xxiii) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 5). (xxiv) Annual mass of each other gaseous input containing carbon fed to each furnace (metric tons) (Equation Q - 5). (xxv) C arbon content of each other gaseous input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 5). (xxvi) Annual mass of each other gaseous output containing carbon produced by each furnace (metric tons) (Equation Q - 5). (xxvii) C arbon content of each other gaseous output containing carbon produced b y each furnace (expressed as a decimal fraction) (Equation Q - 5). (xxviii ) Annual mass of each other liquid input containing carbon fed to each furnace (metric tons) (Equation Q - 5). (xx ix) Carbon content of each other liquid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 5).Page 35 of 39

(xxx) Annual m ass of each other liquid output containing carbon produced by each furnace (metric tons) (Equation Q - 5). (xxxi) Carbon content of each other liquid output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 5). (6) The data in paragraphs (f)(6)(i) through (xvii ) of this section for each applicable decarburization vessel for which the carbon mass balance method of reporting is used . (i) Annual mass of molten steel charged to the vessel (metric tons) (Equation Q - 6 of § 98. 173 ). (ii) Carbon content of the molten steel before decarburization, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 6). (iii) Carbon content of the molten steel after decarburization, from the carbon anal ys is results (expre ssed as a decimal fraction) (Equation Q - 6). (iv) Annual mass of air pollution control residue collected (metric tons) (Equation Q - 6). (v) Carbon content of the air pollution control residue, from the carbon analysis results (expressed as a decimal fraction) (Equation Q - 6). (vi) Annual mass of each other solid input containing carbon fed to each decarburization vessel (metric tons) (Equation Q - 6). (vii) Carbon content of each other solid input containing carbon fed to each decarburization vessel (expressed a s a decimal fraction) (Equation Q - 6). (viii) Annual mass of each other solid output containing carbon produced by each decarburization vessel (metric tons) (Equation Q - 6). (ix) Carbon content of each other solid output containing carbon (expressed as a de cimal fraction) (Equation Q - 6).Page 36 of 39

(x) Annual mass of each other gaseous input containing carbon fed to each decarburization vessel (metric tons) (Equation Q - 6). (xi) C arbon content of each other gaseous input containing carbon fed to each decarburization ves sel (expressed as a decimal fraction) (Equation Q - 6). (xii) Annual mass of each other gaseous output containing carbon produced by each decarburization vessel (metric tons) (Equation Q - 6). (xi ii ) C arbon content of each other gaseous output containing carbon produced by each decarburization vessel (expressed as a decimal fraction) (Equation Q - 6). (x iv) Annual mass of each other liquid input containing carbon fed to each decarburization vessel (metric tons) (Equation Q - 6). (xv) Carbon content of each other liquid input containing carbon fed to each decarburization vessel (expressed as a decimal fraction) (Equation Q - 6). (xvi) Annual mass of each other liquid output containing carbon produced by each de carburization vessel (metric tons) (Equation Q - 6). (xvii ) Carbon content of each other liquid output containing carbon produced by each decarburization vessel (expressed as a decimal fraction) (Equation Q - 6). (7) The data in paragraphs (f)(7)(i) through (xxvi i) of this section for each applicable direct reduction furnace for which the carbon mass balance method of reporting is used . (i) Annual volume of the gaseous fuel (scf at 68F and 1 atm) (Equation Q - 7 of § 98.173 ). (ii) Average carbon content of the gaseous fuel, from the fuel anal ys is results (kg C per kg of fuel) (Equation Q - 7). (iii) Molecular weight of the gaseous fuel (kg/kg - mole) (Equation Q - 7).Page 37 of 39

(iv) Annual mass of iron ore or iron pellets fed to the furnace (metric tons) (Equation Q 7). (v) Car

bon content of the iron ore or iron pellets, from the carbon anal ys is (expressed as a decimal fraction) (Equation Q - 7). (vi) Annual mass of carbonaceous materials (e.g., coal, coke) charged to the furnace (metric tons) (Equation Q - 7). (vii) Carbon content of the carbonaceous materials, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 7). (viii) Annual mass of each other material charged to the furnace (metric tons) (Equation Q - 7). (ix) Average carbon content of each other material charged to the furnace, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 7). (x) Annual mass of iron produced (metric tons) (Equation Q - 7). (xi) Carbon content of the iron produced, from the carbon anal ys is results (expres sed as a decimal fraction) (Equation Q - 7). (xii) Annual mass of non - metallic materials produced b y the furnace (metric tons) (Equation Q - 7). (xiii) Carbon content of the non - metallic materials produced, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 7). (xiv) Annual mass of air pollution control residue collected (metric tons) (Equation Q - 7). (xv) Carbon content of the air pollution control residue collected, from the carbon anal ys is results (expressed as a decimal fraction) (Equation Q - 7).Page 38 of 39

(xvi) Annual mass of each other solid input containing carbon fed to each furnace (metric tons) (Equation Q - 7). (xvii) Carbon content of each other solid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equatio n Q - 7). (xviii) Annual mass of each other solid output containing carbon produced by each furnace (metric tons) (Equation Q - 7). (xix) Carbon content of each other solid output containing carbon (expressed as a decimal fraction) (Equation Q - 7). (xx) Annual mass of each other gaseous input containing carbon fed to each furnace (metric tons) (Equation Q - 7). (xxi) C arbon content of each other gaseous input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 7). (xxii) Annual mas s of each other gaseous output containing carbon produced by each furnace (metric tons) (Equation Q - 7). (xx ii i) C arbon content of each other gaseous output containing carbon produced b y each furnace (expressed as a decimal fraction) (Equation Q - 7). (xx iv) Annual mass of each other liquid input containing carbon fed to each furnace (metric tons) (Equation Q - 7). (xxv) Carbon content of each other liquid input containing carbon fed to each furnace (expressed as a decimal fraction) (Equation Q - 7). (xxvi) Annual mass of each other liquid output containing carbon produced by each furnace (metric tons) (Equation Q - 7).Page 39 of 39

(xxv i i ) Carbon content of each other liquid output containing carbon produced by each furnace (expressed as a decimal fraction) (Equation Q - 7). ( 8) The data in paragraphs (f)(8)(i) and (ii) of this section for each process unit for which the site - specific emission factor method was used . (i) Average hourl y feed or production rate, as applicable, during the test (metric tons/hour) ( as used in § 98.1 73(b)(2)(iii)). (ii) Annual total feed or production, as applicable (metric tons) ( as used in § 98.173(b)(2)(iv)). (9) T otal coal charged to the coke ovens for each process (metric tons /year)( as used in § 98.173(c)). **§98.178 Definitions.**  All terms used in this subpart have the same meaning given in the Clean Air Act and subpart A of this part.