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 G—Ammonia Manufacturing (§98.70 to §98.78) > 98.77—Records that must be retained.

98.77—Records that must be retained.

In addition to the records required by § 98.3(g), you must retain the following records specified in paragraphs (a) and (b) of this section for each ammonia manufacturing unit.
(a) If a CEMS is used to measure emissions, retain records of all feedstock purchases in addition to the requirements in § 98.37 for the Tier 4 Calculation Methodology.
(b) If a CEMS is not used to measure process CO2 emissions, you must also retain the records specified in paragraphs (b)(1) through (b)(2) of this section:
(1) Records of all analyses and calculations conducted for reported data as listed in § 98.76(b).
(2) Monthly records of carbon content of feedstock from supplier and/or all analyses conducted of carbon content.