| Main Title |
National Air Surveillance Cascade Impactor Network. III. Variations in Size of Airborne Particulate Matter Over Three-Year Period. |
| Author |
Lee, Jr., Robert E. ;
Goranson., Stephen ;
|
| CORP Author |
Health Effects Research Lab., Research Triangle Park, N.C. |
| Year Published |
1975 |
| Report Number |
EPA/600/J-76/058; |
| Stock Number |
PB-267 875 |
| Additional Subjects |
Particle size distribution ;
Automobiles ;
Aerosols ;
Impactors ;
Sampling ;
Exhaust emissions ;
Fines ;
Cascade impactors ;
Air pollution sampling ;
Reprints
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-267 875 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
A cascade impactor network operating from 1970 through 1972 at eight urban and two nonurban sites indicated that the median size of airborne particles on a mass basis appeared to increase over the sampling period. Quarterly variations in the median size were associated with seasonal changes, decreasing in summer but increasing in winter. The general upward trend in the size of airborne particles appeared to be associated with the reduction in automotive emissions that can lead to the formation of fine, secondary aerosols. Other possible explanations, however, were examined in addition to an evaluation of the limitations of the cascade impactor used in the network. |
| Supplementary Notes |
Pub. in Environmental Science and Technology, v10 n10 p1022-1027 Oct 76. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: National Air Surveillance Cascade Impactor Network. III. Variations in Size of Airborne Particulate Matter Over Three-Year Period. |
| PUB Date Free Form |
21 Jul 75 |
| Category Codes |
13B; 68A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/08 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323718438 |
| Origin |
NTIS |
| Type |
CAT |
