Record Display for the EPA National Library Catalog


Main Title Seasonal and monthly activity allocation fractions for nonroad engine emissions modeling.
CORP Author Environmental Protection Agency, Washington, DC. Air and Radiation Div.
Publisher Assessment and Standards Division, Office of Transportation and Air Quality, U.S. Environmental Protection Agency,
Year Published 2004
Report Number EPA 420-P-04-004
Stock Number PB2005-106070
OCLC Number 941838774
Subjects Automobiles--Motors--Exhaust gas--Quality control--Research
Additional Subjects Air pollution control ; Estimates ; Annual activity ; Seasonal activity ; Inventories ; Calculations ; Modeling ; Nonroad engine emissions ; NONROAD ; Activity allocation fractions ; Environmental Protection Agency ; Nonroad air emissions inventory model
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA 420-P-04-004 PDF file on file NVFEL Library/Ann Arbor, MI 12/05/2017
NTIS  PB2005-106070 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Edition Revised April 2004.
Collation 1 online resource (18 pages)
The EPA has developed a national nonroad air emissions inventory model called NONROAD. The model uses estimates of annual activity for each equipment type, e.g., generally expressed in terms of hours of operations or gallons of fuel used per year, to calculate yearly emission inventories. It will also calculate inventories on a seasonal (i.e., summer, fall, winter, spring), monthly, or daily (i.e., week or weekend day) basis by allocating annual activity to these smaller time periods. This memorandum documents the seasonal and monthly activity allocation fractions used by the model. Daily activity allocation fractions are addressed in a separate technical memorandum. The EPA currently considers these fractions to be final inputs for the draft NONROAD2004 model.
Title from title screen (viewed on Feb. 29, 2016). "NR-004b." "EPA420-P-04-004." "Supersedes EPA420-P-02-010." Includes bibliographical references.