| Main Title |
The trend of suspended particulates in urban air : 1957-1964 / |
| Author |
McMullen, Thomas B. ;
Smit, R.
|
| Other Authors |
|
| CORP Author |
Robert A. Taft Sanitary Engineering Center, Cincinnati, Ohio. Lab. of Engineering and Physical Sciences. |
| Publisher |
U.S. Dept. of Health, Education and Welfare, Public Health Service, Division of Air Pollution, |
| Year Published |
1965 |
| Report Number |
PHS PUB 999 AP 19 |
| Stock Number |
PB-170 475 |
| Subjects |
Air--Pollution--United States ;
Dust ;
Aerosols
|
| Additional Subjects |
( Air pollution ;
Particles) ;
( Dust ;
Density) ;
Samplers ;
Collecting methods ;
Statistical analysis ;
Environment ;
Urban areas ;
Meteorological parameters
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-170 475 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
v, 27 pages : illustrations ; 24 cm. |
| Abstract |
The trend toward lower average concentrations of suspended particulate pollution in the urban air in the United States from 1957 through 1963, indicated by measurements of the National Air Sampling Network, is investigated from three aspects: (1) statistical significance, (2) the validity of the sampling and analytical methods, and (3) relationship to environmental changes in the vicinity of the sampling stations. The evidence indicates that the decline is real and that the methods employed can reliably detect substantive changes in the concentration of suspended particulate pollution. Information on changes in the environments of a representative group of stations revealed that where significant decreases in suspended particulates occurred, they were often logically related to specific changes in source emissions. Thus the indicated decline in the suspended particulate portion of urban air pollution is verified and substantially accounted for. A statistically significant increase in the annual mean occurred in 1964; if continued, such an increase would suggest the possibility of cyclic influences. (Author) |
| Notes |
Public Health Service publication no. 999-AP-19. Microfiche. |
| Place Published |
Cincinnati, |
| Title Ser Add Ent |
Public Health Service publication ; |
| PUB Date Free Form |
1965. |
| Series Title Untraced |
Environmental health series: air pollution |
| NTIS Prices |
PC A03 MF A01 |
| BIB Level |
m |
| Cataloging Source |
OCLC/T |
| OCLC Time Stamp |
20040205123433 |
| Language |
eng |
| Origin |
NTIS |
| Type |
MERGE |
| OCLC Rec Leader |
01080nam 2200289Ka 45020 |
