| Main Title |
The national air pollution background network final project report / |
| Author |
Evans, Gary F. ;
Evans, G. F.
|
| Other Authors |
|
| CORP Author |
Environmental Monitoring Systems Lab., Research Triangle Park, NC. |
| Publisher |
U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, |
| Year Published |
1985 |
| Report Number |
EPA-600/4-85-038 |
| Stock Number |
PB85-212413 |
| OCLC Number |
958163174 |
| Subjects |
Air--Pollution--United States--Measurement ;
Air quality monitoring stations--United States ;
Air--Pollution--Measurement
|
| Additional Subjects |
Air pollution ;
Ozone ;
Forests ;
Monitors ;
Assessments ;
National government ;
Sites ;
Sampling ;
Standards ;
Concentration(Composition) ;
Trends ;
Graphs(Charts) ;
Calibrating ;
Tables(Data) ;
Regression analysis ;
Air quality ;
Air pollution sampling ;
National Air Pollution Background Network
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD ARCHIVE |
EPA 600-4-85-038 |
|
Headquarters Library/Washington,DC |
05/16/2017 |
| ESBD |
EPA-600/4-85-038 |
|
CPHEA/PESD Library/Corvallis,OR |
09/16/2016 |
DISPERSAL |
| NTIS |
PB85-212413 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 34 leaves : illustrations, 1 map ; 28 cm |
| Abstract |
The U.S. Environmental Protection Agency, in cooperation with the U.S. Forest Service, operated a network of ozone monitoring stations from 1976 through 1983 in selected National Forests within the continental U.S. The primary objective of this project was to determine the level of ozone concentrations occurring in remote areas, especially in relation to the National Ambient Air Quality Standard for ozone. Secondary objectives included the evaluation of regional differences, the characterization of seasonal and diurnal patterns, and the assessment of long-term trends for ozone concentrations in remote areas. Annual mean ozone concentrations were found to vary from site-to-site and year-to-year within a range of 25 to 50 parts per billion (ppb). Hourly ozone concentrations in excess of 120 ppb, the current level of the National Ambient Air Quality Standard, were occasionally observed. Such events, however, were rare and generally confined to the spring and summer months at sites in the eastern half of the U.S. and during the first half of the study period. No such events were observed after 1980. Seasonal mean ozone concentrations were greatest during the spring months (April through June) and diurnal maximums occurred most frequently during the early afternoon (1-3 p.m.). While no statistically significant trends were observed in mean ozone concentrations, the frequency of exceedances of the National Ambient Air Quality Standard decreased over the course of the study. |
| Notes |
"PB85-212413." "EPA/600/4-85/038." "May 1985." Project officer: Barry E. Martin. Includes bibliographical material. |
