offi ce of transportation epa420 r 05 022 and air quality december 2005 nr 006d nonroad engine population estimates assessment standards division office us environmental protection agency notice this technical report does not necessarily represent fi nal epa decisions or positions it is intended to present analysis issues using data that are currently available the purpose in release such reports facilitate an exchange information inform public developments memorandum document source values used s final nonroad2005 emission inventory model populations provided as default categorized by equipment type power level fuel categorization allows determine phase new other unique aspects emissions allocations application introduction base year a starting point estimate future past
