CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 98—MANDATORY GREENHOUSE GAS REPORTING > SUBPART H—Cement Production (§98.80 to §98.88) > 98.87—Records that must be retained.

98.87—Records that must be retained.

(a) If a CEMS is used to measure CO2 emissions, 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.
(b) If a CEMS is not used to measure CO2 emissions, 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.
(1) Documentation of monthly calculated kiln-specific clinker CO2 emission factor.
(2) Documentation of quarterly calculated kiln-specific CKD CO2 emission factor.
(3) Measurements, records and calculations used to determine reported parameters.

Code of Federal Regulations

[75 FR 66461, Oct. 28, 2010]