Record Display for the EPA National Library Catalog


Main Title The national air pollution background network final project report /
Author Evans, Gary F. ; Evans, G. F.
Other Authors
Author Title of a Work
Martin, Barry E.
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
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA 600-4-85-038 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
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
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.
"PB85-212413." "EPA/600/4-85/038." "May 1985." Project officer: Barry E. Martin. Includes bibliographical material.