•If you use a surrogate, you
could get interference.
•Or their could be
financial issues in some testing (Emissions
Credits, State Title V emission fees per
ton for VOCs )
•
•Surrogates are NOT
allowed where the money is involved
for credit trading:
•Some Methods and testing, you have to use EPA protocol gases (Part 75 / Part 60)
•Some Methods you have to use certified Zero Gases (CFR 40 72.2)*
•* (A gas is not a zero gas unless it meets the
definition)