These flat files represent emissions for the 2014 NEI version 1. 

They are formats that can be input to SMOKE for processing for air quality modeling.

However, for onroad and nonroad mobile sources, we use more finely resolved data
for air quality modeling: monthly for nonroad, and emissions are computed hourly
for onroad based on gridded meteorological data and emission factors.  So, these
files should not be used directly for modeling.

For point and nonpoint sources, we typically split these comprehensive files into
smaller sectors for emissions modeling. 

Once these inventories have been developed into air quality model-ready emissions for
the National Air Toxics Assessment, the sector-specific inventory files and associated 
ancillary data for SMOKE will be made available at: 

ftp://ftp.epa.gov/EmisInventory/2014platform

We expect this to be sometime in November of 2014.