Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Seasonal and monthly activity allocation fractions for nonroad engine emissions modeling.
CORP Author Environmental Protection Agency, Washington, DC. Office of Transportation and Air Quality.
Publisher U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Assessment and Standards Division,
Year Published 2005
Report Number EPA420-R-05-017
Stock Number PB2010-107318
OCLC Number 863492899
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-R-05-017 PDF file on file NVFEL Library/Ann Arbor, MI 12/16/2013
NTIS  PB2010-107318 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/13/2011
Collation 1 online resource ([22] pages)
The United States Environmental Protection Agency (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., weekday or weekend day) basis by allocating annual activity to these smaller time periods. This report documents the seasonal and monthly activity allocation fractions used by the model. Daily activity allocation fractions are addressed in a separate technical report. The only substantive change from draft NONROAD2004 is the seasonal allocation of construction equipment, described in the Methodology/Results section below. Seasonal inputs have also been added for Puerto Rico and the U.S. Virgin Islands, simply by assigning them to the Southeast region and using those existing values. The EPA currently considers these seasonal fractions to be final inputs for the draft NONROAD2005 model. The remainder of this report is organized into two parts. The first part contains a basic description of the overall approach and sources of information that are used to develop the requisite temporal allocation fractions. The second part explains how this information is used and describes the final default values for each state.
"NR-004c." "December 2005." Title from title screen (viewed on Nov. 20, 2013). "EPA420-R-05-017." Includes bibliographical references (page [19]).