Speciation for UAMV 1.30 using EPS 2.5 The speciation for UAMV 1.30 which uses the CBIV-TOX chemical mechanism is performed by the EPS 2.5 CHMSPL module. It requires a split factors file which includes the information for TOX speciation. The TOX split factors are designed for speciation of THC. Therefore, it is necessary that THC emissions be included in the input EMBR file. If the input AFS/AMS files contain emissions of VOC rather than THC, then the VOC emissions must be converted to THC. The VOC to THC conversion can be performed at the entry point of EPS 2.5: PREPNT for point source, and PREAM for area, non-road and on-road mobile sources. Included in this archive are the sample PREPNT and PREAM jobs (prp.sample.job and pra.ar.sample.job), associated SCC(ASC)/speciation profiles cross-reference file (chmprf.xref.voc2thc.v021695.tox), and Perl programs (voc2thc.afs.pl and voc2thc.ams.pl), which perform the THC to VOC conversion. Attached are also the split factors file (splitfac.thc-tox.990503) and associated SCC(ASC)/speciation profiles cross-reference file (chmprf.xref.thc-tox.990503), which are the inputs to EPS 2.5 CHMSPL module. The compounds data base (compound.021695.tox.dat, which is not used directly by EPS 2.5) includes speciation information for real world compounds to TOX species. If you are not using EPS 2.5 to perform the speciation step, then you will need to modify your emissions processing system to use the speciation information in the above files.