This section describes how to determine deterioration factors, either with pre-existing test data or with new emission measurements.
Where:
NE = engine-out emission levels (pre-catalyst) from the low-hour test result for a given pollutant, in g/kW-hr.
EDF = the deterioration factor specified in paragraph (c)(1) of this section for the type of engine for a given pollutant.
CC = the catalyst conversion from the low-hour test, in g/kW-hr. This is the difference between the official emission result and NE.
F = 1.0 for NOX and 0.8 for HC and CO.
40 C.F.R. §1054.245