For criteria pollutants, the 1996 National Emissions Inventory (NEI) used for the Heavy Duty Diesel vehicle rulemaking was used.
The 1996 NEI numbers were deemed unsuitable for this application.
mnli hypothesis: The 1996 NEI numbers were deemed unsuitable for this application. premise: For criteria pollutants, the 1996 National Emissions Inventory (NEI) used for the Heavy Duty Diesel vehicle rulemaking was used.