| Main Title |
Fungal emission reates and their impact on indoor air / |
| Author |
Foarde, Karin K. ;
VanOsdell, D. W. ;
Owen, M. K. ;
Chang, J. C. S.
|
| Other Authors |
|
| CORP Author |
Research Triangle Inst., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div. |
| Publisher |
U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, |
| Year Published |
1997 |
| Report Number |
EPA/600/A-98/030; EPA-R-822642 |
| Stock Number |
PB98-140239 |
| Additional Subjects |
Fungi ;
Indoor air pollution ;
Space HVAC systems ;
Emissions ;
Microorganisms ;
Spores ;
Aspergillus ;
Penicillium ;
Ecological concentration ;
Environmental exposure ;
Ducts ;
Air flow ;
Flow rates ;
Relative humidity ;
Ventilation systems ;
Air pollution sources ;
Air pollution monitoring ;
Indoor air quality ;
Mathematical models ;
Emission rates
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB98-140239 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
14 pages : illustrations ; 28 cm |
| Abstract |
The paper reports on preliminary experiments that show that fungal dissemination in air ducts has complex interactions with humidity. To replicate levels of fungal growth similar to those documented in the literature, duct materials were allowed to develop microbial (Penicillium and Aspergillus) contamination in a constant temperature and high-humidity environment. A known and constant air flow was maintained throughout. Almost no spore release was seen over 3 months of periodic sampling with constant exposure to 95% relative humidity (RH), while surface growth increased at least 2-3 orders of magnitude. After 3 months, a series of experiments was initiated to investigate the impact of RH on fungal emissions. In these, the RH was varied and culturable fungal spore emissions were measured. The level to which the RH was decreased was inversely related to increasing emissions. To better understand the implications of the spore emission rates measured in these experiments on indoor air quality (IAQ), an IAQ Model was used to estimate concentration and occupant exposure. |
| Notes |
"EPA/600/A-98/030." "PB98-140239." "Presented at 2nd Biennial Conference, Engineering Solutions to IAQ Problems, Research Triangle Park, NC, 7/21-23/97." "John C.S. Chang, project officer." Microfiche. |
| Place Published |
Research Triangle Park, NC : |
| Supplementary Notes |
Details in illustrations may not be fully legible in microfiche. Presented at the Biennial Conference (2nd), Engineering Solutions to IAQ Problems, Research Triangle Park, NC., July 21-23, 1997. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div. |
| Availability Notes |
Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.fedworld.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| Corporate Au Added Ent |
United States. ; Air Pollution Prevention and Control Division. ; Research Triangle Institute. |
| PUB Date Free Form |
1997. |
| NTIS Prices |
PC A03/MF A01 |
| BIB Level |
m |
| Cataloging Source |
OCLC/T |
| OCLC Time Stamp |
20010806170310 |
| Language |
eng |
| Origin |
NTIS |
| Type |
MERGE |
| OCLC Rec Leader |
01463nam 2200325Ka 45020 |
