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 F—Aluminum Production (§98.60 to §98.68) > 98.66—Data reporting requirements.

98.66—Data reporting requirements.

In addition to the information required by § 98.3(c), you must report the following information at the facility level:
(a) Annual aluminum production in metric tons.
(b) Type of smelter technology used.
(c) The following PFC-specific information on an annual basis:
(1) Perfluoromethane emissions and perfluoroethane emissions from anode effects in all prebake and all Sderberg electrolysis cells combined.
(2) Anode effect minutes per cell-day (AE-mins/cell-day), anode effect frequency (AE/cell-day), anode effect duration (minutes). (Or anode effect overvoltage factor ((kg CF4 /metric ton Al)/(mV/cell day)), potline overvoltage (mV/cell day), current efficiency (%).)
(3) Smelter-specific slope coefficients (or overvoltage emission factors) and the last date when the smelter-specific-slope coefficients (or overvoltage emission factors) were measured.
(d) Method used to measure the frequency and duration of anode effects (or overvoltage).
(e) The following CO2 -specific information for prebake cells:
(1) Annual anode consumption.
(2) Annual CO2 emissions from the smelter.
(f) The following CO2 -specific information for Sderberg cells:
(1) Annual paste consumption.
(2) Annual CO2 emissions from the smelter.
(g) Smelter-specific inputs to the CO2 process equations (e.g., levels of sulfur and ash) that were used in the calculation, on an annual basis.
(h) Exact data elements required will vary depending on smelter technology (e.g., point-feed prebake or Sderberg) and process control technology (e.g., Pechiney or other).

Code of Federal Regulations

[74 FR 56374, Oct. 30, 2009, as amended at 75 FR 79156, Dec. 17, 2010]