||Air quality criteria for particulate matter : summary and conclusions.
||United States. National Air Pollution Control Administration.
|| U.S. Dept. of Health, Education and Welfare, Public Health Service, Consumer Protection and Environmental Health Service,
||EPA-AP-49 sum; EPA 950-S-69-003; NAPCA-Pub-AP-49
Air quality--Standards--United States. ;
Air Pollution--prevention & control.
Air quality--Standards ;
( Air pollution ;
( Particles ;
Air pollution) ;
Particle size ;
Solar radiation ;
Respiratory system ;
Quality control ;
Air quality criteria
||Research Triangle Park Library/RTP, NC
||TD881.N3 1969 no. AP-49
||NVFEL Library/Ann Arbor, MI
||Region 8 Technical Library/Denver,CO
||Region 9 Library/San Francisco,CA
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||19 pages ; 26 cm
||Air quality criteria are an expression of the scientific knowledge of the relationship between various concentrations of pollutants in the air and their adverse effects on man and his environment. They are issued to assist the States in developing air quality standards. Air quality criteria are descriptive; that is, they describe the effects that have been observed to occur when the ambient air level of a pollutant has reached or exceeded specific figures for a specific time period. In developing criteria, many factors have to be considered. The chemical and physical characteristics of the pollutants and the techniques available for measuring these characteristics must be considered, along with exposure time, relative humidity, and other conditions of the environment. The criteria must consider the contribution of all such variables to the effects of air pollution on human health, agriculture, materials, visibility, and climate. Further, the individual characteristics of the receptor must be taken into account. The particulate matter commonly found dispersed in the atmosphere is composed of a large variety of substances. Some of these--flourides, beryllium, lead, and asbestos, for example--are known to be directly toxic, although not necessarily at levels routinely found in the atmosphere today.
||Reprinted from Air Quality Criteria for Particulate Matter issued in 1969 by the National Air Pollution Control Administration.
||A. Summary: 1. General -- 2. Effects on health -- 3. Effects on climate near the ground -- 4. Effects on visibility -- 5. Effects on materials -- 6. Economic effects of atmospheric particulate matter -- 7. Effects on vegetation -- 8. Effects on public concern -- 9. Suspended particles as a source of odor -- B. Conclusions: 1. Effects on health -- 2. Effects on direct sunlight -- 3. Effects on visibility -- 4. Effects on materials -- 5. Effects on public concern.
||Paper copy available from Superintendent of Documents, GPO, Washington, D.C. 20402. $1.75 as FS 2.300:AP-49.
||Also available via the World Wide Web.
|PUB Date Free Form
|OCLC Time Stamp
|OCLC Rec Leader
||02233cam 2200445Ii 45010