Section 98.66 - Data reporting requirementsIn addition to the information required by § 98.3(c) , you must report the following information at the facility level:
(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 Søderberg 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 if using the method in § 98.63(g) .(2) Annual CO2 emissions from the smelter.(f) The following CO2-specific information for Søderberg cells: (1) Annual paste consumption if using the method in § 98.63(g) .(2) Annual CO2 emissions from the smelter.(h) Exact data elements required will vary depending on smelter technology (e.g., point-feed prebake or Søderberg) and process control technology (e.g., Pechiney or other). 74 FR 56374 , Oct. 30, 2009, as amended at 75 FR 79156 , Dec. 17, 2010; 79 FR 63784 , Oct. 24, 2014; 81 FR 89253 , Dec. 9, 2016