indicating both methods exhibited similar delta dierence, i.e. both methods displayed similar changes in emissions between baseline-to-EOP. The three outliers, labeled on the More generally, an operator deploying only one TD method will have no information to determine if a measured facility is one of the 11 (79% of facilities) which showed similar delta dierences between methods, or one of the three (21%) that showed dissimilar delta dierences between facilities, and therefore would have few clues to dierentiate between a decrease in the quality of TD method results, or a major change in facility emissions.