Code of Federal Regulations Title 40. Protection of Environment § 40.98.65 Procedures for estimating missing data

(a) Where anode or paste consumption data are missing, CO₂ emissions can be estimated from aluminum production by using Equation F–9 of this section.

Where:

ECO₂ = CO₂ emissions from anode and/or paste consumption, metric tons CO₂.

EF_p = Prebake technology specific emission factor (1.6 metric tons CO₂/metric ton aluminum produced).

MP_p = Metal production from prebake process (metric tons Al).

EF_s = Søderberg technology specific emission factor (1.7 metric tons CO₂/metric ton Al produced).

MP_s = Metal production from Søderberg process (metric tons Al).

(b) For other parameters, use the average of the two most recent data points after the missing data.