Impact/Purpose:

To use the tools of x-ray fluorescence (XRF), ion chromatography (IC), scanning electron microscopy (SEM), thermal optical (organic and elemental carbon -- OC & EC), and radiocarbon analysis combined with various receptor models to determine the contributions of sources to PM as measured in outdoor (ambient) environments or particular microenvironments involving human exposure issues.

Description:

Source apportionment (receptor) models are mathematical procedures for identifying and quantifying the sources of ambient air pollutants and their effects at a site (the receptor), primarily on the basis of species concentration measurements at the receptor, and generally without need of emissions and meteorological data. NERL's PM source apportionment program covers both measurements and modeling and includes (1) chemical and physical characterization of PM samples, (2) radiocarbon (14C) determination of biogenic content of PM, (3) receptor model development, (4) receptor model applications, and (5) source profile measurement and collection.

Record Details:

Record Type:PROJECT

Start Date:10/01/1999

Completion Date:09/01/2001

Record ID: 15837

Show Additional Record Data

Project Information:

Progress :Manuscripts -

G.A. Norris et al., "Composition and Sources of PM in Phoenix AZ", J. Air Waste Manage. Assoc. (in journal review) - the article presents species mass balance and spatial distribution, and PCA and CMB receptor model analyses, of NERL Phoenix Research Platform data..

T.F. Mar, G.A. Norris et al., "Associations between Air Pollution and Mortality in Phoenix, 1995-1997," Environ. Health Perspectives, Volume 108, Number 4, April 2000, pp 347 - 353. - the article shows significant association of cardiovascular mortality with PM-2.5 and PM-10 measured daily over 3 yrs. at the NERL Phoenix Research Platform, and also with CO, NO2, and SO2, and elemental carbon (EC).

R.D. Willis, "Workshop on UNMIX and PMF as applied to PM-2.5". U.S. EPA Report No. EPA/600/A-00/048 (June 2000) - the report is the proceedings of a workshop to evaluate the performance of two advanced receptor models.

FY00 APM 444 (Key): "Produce improved receptor models (CMB8 and UNMIX) for measurement of source category emissions impacts on air quality"; due 09/00. NERL clearance of software modules and user's manuals: 11/15/00.

Miscellaneous - Two commercial instruments for performing OC/EC measurements have been installed. XRF and IC analyses of samples from the Fresno and RTP personal exposure studies are in progress. Radiocarbon analysis of the PM-2.5 samples collected during the "SCOS97" and "Nashville99" field studies have begun.

ABSTRACT/ORAL

Date Cleared - Citation

08-DEC-99 - Landis, M.S., Norris, G.A., Williams, R.W., Sheldon, L.S., and Creason, J.P. Personal exposures to PM 2.5 mass and trace elements in Baltimore, Maryland. PM 2000 AWMA Conference, Charleston, SC, January 24-28, 2000.

07-MAR-00 - Lewis, C.W., Stockburger, L., Klouda, G.A., Ellenson, W.D., and Fortune, C.R. Radiocarbon analysis of PM 2.5 ambient aerosol. Abstract presented at: SOS Data Analysis Workshop 2000, RTP, NC, March 6-10, 2000.

31-AUG-00 - Lewis, C.W., Klouda, G.A., and Ellenson, W.D. Radiocarbon measurements on PM-2.5 ambient aerosol. Abstract presented at: NARSTO 2000 Tropospheric Aerosols: Science and Decisions in an International Community, Queretaro, Mexico, Octoer 23-26, 2000.

JOURNAL

Date Cleared - Citation

19-NOV-99 - Mar, T.F., Norris, G.A., Koenig, J.Q., and Larson, T.V. Associations between air pollution and mortality in Phoenix, 1995-1997. Published in: Environmental Health.

SYMPOSIUM/CONFERENCE

Date Cleared - Citation

25-SEP-00 - Coulter, T., Wagoner, R.A., and Lewis, C.W. "Chemical mass balance model: EPA-CMB8.2." Paper presented at: International Symposium on Measurement of Toxic and Related Air Pollutants, Research Triangle Park, NC, September 12-14, 2000

07-JUL-00 - Willis, R.D. "Workshop on UNMIX and PMF as Applied to PM 2.5." U.S. EPA Report No. EPA/600/A-00/048, Research Triangle Park, NC, February 14-16, 2000

02-NOV-99 - M. S. Landis, G. A. Norris, R. B. Zweidinger, R. W. Willliams and J. C. Suggs, Relationship between a community monitor and personal exposure to PM2.5 mass and trace elements in Baltimore, Maryland, PM 2000 Conference, Charleston, SC, January 24-28, 2000.



Relevance :This task supports GPRA Goal 1 (Clean Air) through the related APG's and APM's listed below. The source apportionment modeling activities under this task are intended to provide quantitative estimates of the contributions that source emissions make to measured concentrations of air pollutants in ambient or human exposure-related microenvironments. Such estimates constitute the fundamental knowledge that is required in order to know which sources to control to meet NAAQS or reduce human exposures. The laboratory analytical activities under this task not only support source apportionment modeling, but also provide an analytical service to NERL's human exposure program, in furnishing a basic level of PM chemical characterization of field samples.

Clients :James Homolya (OAQPS), Mark Schmidt (OAQPS), Lara Autry (OAQPS), Richard Scheffe (OAQPS), Linda Sheldon (NERL), NARSTO, SOS, William Wilson (NCEA), Joellen Lewtas (NERL), Marilyn Engle (OIA).

Project IDs:

ID Code :3932

Project type :OMIS