Hi Jiang,
Those definitions are out of date but BIOG is likely isoprene, terpenes, and/or sesquiterpenes.
What do you want to do with “VOC”? If you want it to be total atmospheric gaseous organic carbon, I would go through the GC.nml and include all reactive carbon-containing species. If you want it to be emitted VOCs, then I would include all organics from the EmisCtrl* file that are emitted. If you want to compare to AQS NMOC, you may need to consider a volatility and/or O:C cutoff in your definition of “VOC”. If you want the regulatory definition of “VOC” you should check 40 CFR 51.100 (40 CFR § 51.100 - Definitions. | CFR | US Law | LII / Legal Information Institute) and remove exempt VOCs like acetone and ethane.
The files may be updated in the next CMAQ release (VOC will be deprecated in the CRACMM mechanism SpecDef in favor of GROC, or gaseous reactive organic carbon, defined as all gas-phase reactive organic carbon regardless of volatility, O:C, or exempt status).
Havala