| Main Title |
Verification of the isopleth method for relating photochemical oxidant to precursors / |
| Author |
Trijonis, J. ;
Hunsaker., D.
|
| CORP Author |
Technology Service Corp., Santa Monica, Calif.;Environmental Sciences Research Lab., Research Triangle Park, N.C. |
| Publisher |
U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory : Available from the National Technical Information Service, |
| Year Published |
1978 |
| Report Number |
EPA-600/3-78-019; EPA-68-02-2299 |
| Stock Number |
PB-278 196 |
| OCLC Number |
05309606 |
| Subjects |
Air--Pollution ;
Mathematical models ;
Ozone
|
| Additional Subjects |
Air pollution ;
Mathematical models ;
Ozone ;
Trends ;
Concentration(Composition) ;
Hydrocarbons ;
Nitrogen oxides ;
Nomographs ;
Oxidizers ;
Los Angeles(California)
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-3-78-019 |
c.1 |
Headquarters Library/Washington,DC |
09/06/2011 |
| EKBD |
EPA-600/3-78-019 |
|
Research Triangle Park Library/RTP, NC |
07/18/2003 |
| ELBD ARCHIVE |
EPA 600-3-78-019 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ESAD |
EPA 600-3-78-019 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-278 196 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
ix, 111 [i.e. 61] p. : ill. ; 28 cm. |
| Abstract |
Historical trend data for oxidant concentrations in the Los Angeles region were used to check the isopleth method that has been proposed as a replacement for the Appendix J method for relating oxidant to non-methane hydrocarbon (NMHC) and nitrogen oxide (NOx) precursors. Using the median 6-9 AM NMHC/NOx ratio measured during the summer as input to the isopleth model, significant discrepancies were found between the isopleth predictions and actual oxidant trends. Using a range in the NMHC/NOx ratio, in particular a low value for the ratio, much better agreement was found between the predicted and actual trends. Potential explanations for the discrepancies are discussed. |
| Notes |
NTIS PB 278 196. |
