Where:
Eday = The daily PM, HCl, and D/F (and HF for uncontrolled group 1 furnaces) emission rate for the secondary aluminum processing unit for the 24-hour period;
Ti = The total amount of feed, or aluminum produced, for emission unit i for the 24-hour period (tons or Mg);
ERi = The measured emission rate for emission unit i as determined in the performance test (lb/ton or [MICRO]g/Mg of feed/charge); and
n = The number of emission units in the secondary aluminum processing unit.
40 C.F.R. §63.1510