(a) You must report emissions of the following gases in metric tons per year resulting from their use as cover gases or carrier gases in magnesium production or processing:

(1) Sulfur hexafluoride (SF6).

(2) HFC-134a.

(3) The fluorinated ketone, FK 5-1-12.

(4) Carbon dioxide (CO2).

(5) Any other GHGs (as defined in §98.6).

(b) You must report under subpart C of this part (General Stationary Fuel Combustion Sources) the CO2, N2O, and CH4 emissions from each combustion unit by following the requirements of subpart C.