Page 1 of 12 **Subpart H —**  **Cement Production**
The cement production source category consists of each kiln and each in

- line kiln/raw mill at any portland cement manufacturing facility including alkali bypasses, and includes kilns and in

- line kiln/raw mills that burn hazardous waste. § 98.80 Definition of the source category.

You must report GHG emissions under this subpart if your facility contains a cement production process a nd the facility meets the requirements of either §98.2(a)(1) or (2). § 98.81 Reporting threshold.

You must report: § 98.82 GHGs to report.

(a) CO 2 (b) CO process emissions from calcination in each kiln.

2 (c) CH combustion emissions from each kiln.

4 and N 2

(d) CO O combustion emissions from ea ch kiln. You must calculate and report these emissions under subpart C of this part (General Stationary Fuel Combustion Sources) by following the requirements of subpart C.

2 , CH 4 , and N 2 O emissions from each stationary combustion unit other than kil ns. You must report these emissions under subpart C of this part (General Stationary Fuel Combustion Sources) by following the requirements of subpart C. § 98.83 Calculating GHG emissions.Page 2 of 12 You must calculate and report the annual process CO 2

(a) For each cement kiln that meets the conditions specified in §98.33(b)(4)(ii) or (b)(4)(iii), you must calculate and report under this subpart the combined process and combustion CO emission s from each kiln using the procedure in paragraphs (a) and (b) of this section.

2 emission s by operating and maintaining a CEMS to
measure CO 2

(b) For each kiln that is not subject to the requirements in paragraph (a) of this section, calculate and report the process and combustion CO emission s according to the Tier 4 Calculation Methodology specified in §98.33(a)(4) and all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion So urces).

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(c) Calcu late and report under this subpart the combined process and combustion CO emission s from the kiln by using the procedure in either paragraph (c) or (d) of this section.

2 emission s by operating and maintaining a CEMS to measure CO 2

(d) Calculate and report process and combustion CO emission s according to the Tier 4 Calculation Methodology specified in §98.33(a)(4) and all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion Sources).

2 emission s separately using the procedures specified in paragraphs (d)(1) through (d)(4) of this section.Page 3 of 12 (1) Calculate CO 2 pr ocess emissions from all kilns at the facility using Equation H

– 1 of this section:

Where:
CO 2 CMF = Annual process emissions of CO 2 CO from cement manufacturing, metric tons.
2 Cli,m = Total annual emissions of CO 2 CO from clinker production from kiln m, metric tons.
2 rm = Total annual emissions of CO 2 k = Total number of kilns at a cement manufacturing facility. from raw materials, metric tons.

(2) CO 2 emissions from clinker production . Calculate CO 2 emission s from each kiln using Equations H

– 2 through H
– 5 of this section.

Where: Cli, j
EF = Quantity of clinker produced in month j from kiln m, tons. Cli,j = Kiln specific clinker emission factor for month j for kiln m, metric tons CO 2 CKD, / metric ton clinker computed as specified in Equation H

– 3 of this secti on. i
EF = Cement kiln dust (CKD) not recycled to the kiln in quarter i from kiln m, tons. CKD,i = Kiln specific CKD emission factor for quarter i from kiln m, metric tons CO 2
p = Num ber of months for clinker calculation, 12. / metric ton CKD computed as specified in Equation H

– 4 of this section.

r = Number of quarters for CKD calculation, 4.Page 4 of 12 2000/2205 = Conversion factor to convert tons to metric tons. (i) Kiln

- Specific Clinker Emission Factor . (A) Calculate the kiln

- specific clinker emission factor using Equation H

– 3 of this section.

Where: Cli CaO = Cli Monthly total CaO content of Clinker, wt

fraction.
ncCaO =
MR Monthly non

- calcined CaO content of Clinker, wt
- fraction.
CaO = Molecular

- weight Ratio of CO 2 Cli / CaO = 0.785. MgO = Cli Monthly total MgO content of Clinker, wt

fraction. ncMgO =
MR Monthly non

- calcined MgO content of Clinker, wt
- fraction. MgO = Molecular

- weight Ratio of CO 2 (B) Non

- calcined CaO is CaO that remains in the clinker in the form of CaCO / MgO = 1.092.

3 and CaO in the clinker that entered the kiln as
a non - carbonate species. Non

- calcined MgO is MgO that remains in the clinker in the form of MgCO 3
(ii) and MgO in the clinker that entered the kiln as a non

- carbonate species. Kiln

- Specific CKD Emission Factor . (A) Calculate the kiln

- specific CKD emission factor for CKD not recycled to the kiln using Equation H

– 4 of this section.

Where:Page 5 of 12
CKD CaO = CKD Quarterly total CaO content of CKD not recycled to the kiln, wt

- fraction.
CaO =
MR Quarterly non

- calcined CaO content of CKD not recycled to the kiln, wt

- fraction.
CaO = Molecular

- weight Ratio of CO 2 CKD / CaO = 0.785. MgO = CKD Quarterly total MgO content of CKD not recycled to the kiln, wt

- fraction. MgO =
MR Quarterly non

- calcined MgO content of CKD not recycled to t he kiln, wt

- fraction. MgO = Molecular

- weight Ratio of CO 2 (B) Non

- calcined CaO is CaO that remains in the CKD in the form of CaCO / MgO = 1.092.

3 and CaO in the CKD that entered the kiln as a non

carbonate species. Non

- calcined MgO is MgO that remains in the CKD in the form of MgCO 3
(3) CO and MgO in the CKD that entered the kiln
as a non - carbonate species.

2 emissions from raw materials . Calculate CO 2 emission s from raw materials using Equation H

– 5 of this section:

Where:

rm = The amount of raw material i consumed annually, tons/yr (dry basis) or the amount of raw kiln feed consumed annually, tons/yr (dry basis). CO 2 , rm = Annual CO 2 TOCrm = Organic carbon content of raw material i or organic carbon content of combined raw kiln feed (dry basis), as determined in §98.84(c) or using a default factor of 0.2 percent of total raw material weight. emission s from raw materials.

M = Number of raw materials or 1 if calculating emissions based on combined raw kiln feed. 44/12 = Ratio of molecular weights, CO 2 to carbo n.Page 6 of 12 2000/2205 = Conversion factor to convert tons to metric tons. (4) Calculate and report under subpart C of this part (General Stationary Fuel Combustion Sources) the combustion CO 2 emission s from the kiln according to the applicable requirements in subpa rt C.
(a) You must determine the weight fraction of total CaO and total MgO in CKD not recycled to the kiln from each kiln using ASTM C114

– 09, Standard Test Methods for Chemical Analysis of Hydraulic Cement (incop orated by reference, § 98.84 Monitoring and QA/QC requirements.

see

(b) You must determine the weight fraction of total CaO and total MgO in clinker f rom each kiln using ASTM C114

– 09 Standard Test Methods for Chemical Analysis of Hydraulic Cement (incorporated by reference, §98.7). The monitoring must be conducted quarterly for each kiln from a CKD sample drawn either as CKD is exiting the kiln or from bulk CKD storage.

see

(c) The total organic carbon content (dry basis) of raw materials must be determined annua lly using ASTM C114

– 09 §98.7). The monitoring must be conducted monthly for each kiln from a monthly clinker sample drawn from bulk clinker storage if storage is dedicated to the specific kiln, or from a monthly arithmetic average of daily clinker samples drawn from the clinker conveying systems exiting each kiln.Page 7 of 12 Standard Test Methods for Chemical Analysis of Hydraulic Cement (incorporated by reference, see §98.7) or a similar industry standard practice or method approved for total organic carbon determination in raw mineral materials. The an alysis must be conducted either on sample material drawn from bulk raw kiln feed storage or on sample material drawn from bulk raw material storage for each category of raw material ( i.e.

(d) The quantity of clinker produced monthly by each kiln must be determined by direct weight measurement of clinker using the same plant techn iques used for accounting purposes, such as reconciling weigh hopper or belt weigh feeder measurements against inventory measurements. As an alternative, facilities may also determine clinker production by direct measurement of raw kiln feed and applicatio n of a kiln

- specific feed

- to
- clinker factor. Facilities that opt to use a feed

- to
- clinker factor must verify the accuracy of this factor on a monthly basis. , limestone, sand, shale, iron oxide, and alumina). Facilities that o pt to use the default total organic carbon factor provided in §98.83(d)(3), are not required to monitor for TOC.

(e) The quantity of CKD not recycled to the kiln generated by each kiln must be determined quarterl y using the same plant techniques used for accounting purposes, such as direct weight measurement using weigh hoppers, truck weigh scales, or belt weigh feeders.Page 8 of 12 (f) The annual quantity of raw kiln feed or annual quantity of each category of raw materials consumed by the facility ( e.g.

(g) The monthly non

- calcined CaO and MgO that remains in the clinker in the form of CaCO , limestone, sand, shale, iron oxide, and alumina) must be determined monthly by direct weight measurement using the same plant instruments used for accounting purposes, such as weigh hoppers, truck weigh scales, or belt weigh feeders.

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(h) The quarterly non

- calcined CaO and MgO that remains in the CKD in the form of CaCO or that enters the kiln as a non

carbonate species may be assumed to be a default value of 0.0 or may be determined monthly by careful chemical analysis of f eed material and clinker material from each kiln using well documented analytical and calculational methods or the appropriate industry standard practice.

3 or that enters the kiln as a non

carbonate species may be assumed to be a default value of 0.0 or may be determined quarterly by careful chemical analysis of feed material and CKD material from each kiln using well documented analytical and calculational methods or the appropriate industry standard practice.
A complete record of all measured parameters used in the GHG emissions calculations in §98.83 is required. Therefore, whenever a quality

- assured value of a required par ameter is § 98.85 Procedures for estimating missing data.Page 9 of 12 unavailable, a substitute data value for the missing parameter shall be used in the calculations. The owner or operator must document and keep records of the procedures used for all such estimates. (a) If the CEMS approach is used to determine co mbined process and combustion CO 2
(b) For CO emission s, the missing data procedures in §98.35 apply.

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(c) For each missing value of monthly clinker production the substitute data value must be the best available estimat e of the monthly clinker production based on information used for accounting purposes, or use the maximum tons per day capacity of the system and the number of days per month. process emissions from cement manufacturing facilities calculated according to §98.83(d), if data on the carbonate content (of clinker or CKD), noncalcine d content (of clinker or CKD) or the annual organic carbon content of raw materials are missing, facilities must undertake a new analysis.

(d) For each missing value of monthly raw material consumption the substitute da ta value must be the best available estimate of the monthly raw material consumption based on information used for accounting purposes (such as purchase records), or use the maximum tons per day raw material throughput of the kiln and the number of days pe r month. § 98.86 Data reporting requirements.Page 10 of 12 In addition to the information required by §98.3(c), each annual report must contain the information specified in paragraphs (a) and (b) of this section, as appropriate. (a) If a CEMS is used to measure CO 2

(1) Monthly clinker production from each kiln at the facility. emission s, then you must report under this subpart the relevant information required by §98.36(e)(2)(vi) and the information listed in this paragraph(a):

(2) Monthly Annual facility cement pro duction . from each kiln at the facility. (3) Number of kilns and number of operating kilns. (b) If a CEMS is not used to measure CO 2

(1) Kiln identification number. emission s, then you must report the information listed in this paragraph (b) for each kiln:
(2) Monthly clinker production from each kiln. (3) Annual cement production at the facility. (4) Number of kilns and number of operating kilns. (5) Quarterly quantity of CKD not recycled to the kiln for each kiln at the facility. (6) Monthly fraction of t otal CaO, total MgO, non

- calcined CaO and non

- calcined MgO in clinker for each kiln (as wt

fractions).Page 11 of 12 (7) Method used to determine non

- calcined CaO and non

calcined MgO in clinker. (8) Quarterly fraction of total CaO, total MgO, non

calcined CaO and non

- c alcined MgO in CKD not recycled to the kiln for each kiln (as wt

- fractions). (9) Method used to determine non

- calcined CaO and non

calcined MgO in CKD. (10) Monthly kiln

- specific clinker CO 2 emission factors for each kiln (metric tons CO 2 (11) Quarterly kiln

- specific CKD CO / metric ton clinke r produced).

2 emission factors for each kiln (metric tons CO 2 (12) Annual organic carbon content of raw kiln feed or annual organic carbon content of each raw material (wt

- fraction, dry basis). / metric ton CKD produced).

(13) Annual consumption of raw kiln feed or annual consumption of each raw material (dry basis). (14) Number of times missing data procedures were used to determine the following information: (i) Clinker production (number of months). (ii) Carbonate conten ts of clinker (number of months). (iii) Non

- calcined content of clinker (number of months). (iv) CKD not recycled to kiln (number of quarters). (v) Non

- calcined content of CKD (number of quarters)Page 12 of 12 (vi) Organic carbon contents of raw materials (number of ti mes). (vii) Raw material consumption (number of months). (15) Method used to determine the monthly clinker production from each kiln reported under (b)(2) of this section, including monthly kiln

- specific clinker factors, if used.

(a) If a CEMS is used to measure CO § 98.87 Records that must be retained.

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(b) If a CEMS is not used to measur e CO emission s, then in addition to the records required by §98.3(g), you must retain under this subpart the records required for the Tier 4 Calculation Methodology in §98.37.

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(1) Documentation of monthly calculated kiln

- specific clinker CO emission s, then in addition to the records required by §98.3(g), you must retain the records specified in this paragraph (b) for each portland cement manufacturing facility.

2 (2) Documentation of quarterly calculated kiln

- specific CKD CO emission f actor.

2 (3) Measurements, records and calculations used to determine reported parameters. emission factor.

All terms used in this subpart have the same meaning given in the Clean Air Act and subpart A of this part § 98.88 Definitions.