BDL Below detection limit
ISTD Problem with ISTD peak
STD Problem with standard peak
FIT Problem with curve fit
<conc> CAL Currently calibrating, <conc> = peak table conc. for current level
NEG Negative concentration
<conc>
$$lc Low conc, <conc> = ca
$$lculated conc.
<conc> HC High conc, <conc> = ca
$$lculated conc.