Dr. Rodes has 30 years of experience planning and conducting research and development studies in the areas of size-specific aerosol sampling, total human exposure assessment, personal, indoor air, and microenvironmental air sampling, receptor modeling of size-specific aerosols in urban environments, dermal transfer of dusts and residues, indoor air velocity and turbulence characterizations, pollution prevention from office equipment, PM10 and total inspirable aerosol sampler evaluations, and PM10 sampling.
Conducting Dermal Dust Fate and Transport Research - Conducting research on the dust movements, sources and sinks found in residential settings, including soil dust track-in by shoe type and walk-off surface type, preparation of fluorescently-tagged particle size fractions for house and test dusts, and further study of the adhesive forces that influence the particle size distributions from walking on carpeting. Contract/EPA
Conduct Aerosol Exposure Sampling for Manganese Generated by Mobile Sources - Developed personal, indoor and outdoor aerosol monitoring systems for a commercial client in a study duplicating the EPA PTEAM study, but in a Canadian city with a focus on the PM10 and PM2.5 cutpoints and manganese air exposures over 3 day periods - Contract/Private Client.
NHEXAS Aerosol Sampler Development - Developed personal, indoor and outdoor aerosol sampling systems that accurately assess the air route to total exposure for the EPA NHEXAS program. Personal sampling system development focused on reduction in total burden (noise, weight and size) for extended assessment periods of up to 7 days. Aerosol inlet technologies focused on PM10 and Total Inspirable cutpoints. Cooperative Agreement/EPA
Developing a Mass Balance Approach to Determining Dermal Contribution to Total Exposure - Conducting research on the dermal sampling procedures used in the NHEXAS program to assist in development of a mass balance framework for total human exposure to chlorpyrifos. Cooperative Agreement/EPA
Prepared the Aerosol Sampling Methodology Section for the PM10 / PM2.5 Criteria Document - Co-authored the aerosol sampling section (Chapter 4) as an expert consultant for a peer-reviewed revision of the PM Criteria Document revision for EPA/ECAO. Contract/EPA
Conducting Research Into the Potential Biases in Personal Exposure Sampling for Particles - Currently conducting research under a cooperative agreement with EPA/AREAL to examine the various phenomena that may be contributing to biases between personal and fixed location indoor aerosol sampling. These facets include personal cloud dander and re-entrained floor/carpet aerosols, as well as potential enrichment/depletion biases that may be occurring from air flow around the human bluff body. Cooperative Agreement/EPA
Developed and Implemented a Particle Receptor Modeling Study for Cairo, Egypt - Developed and implemented a receptor monitoring study for USAID to characterize and apportion the urban aerosols by size fraction in Cairo, Egypt, as a function of the source categories. The project included both ambient (receptor) sampling at rural, urban and industrial locations, and source signature sampling representing 12 different source category types. Contract/USAID
1988 to 1992. University of North Carolina - Completed courses and dissertation research in Environmental Engineering leading to the Ph.D. degree. Dissertation research concerned the transport, dispersion and modeling of flow fields and contaminants produced from personal activity sources in indoor air flow regimes.
1966 to 1988. U. S. Environmental Protection Agency - Served as project engineer designing and testing contaminant collection and calibration systems. Conducted field and laboratory measurement studies for spatial and temporal characterization of contaminant distributions. Directed contract and cooperative agreement research studying contaminant and fluid measurement technologies. Developed research programs to investigate population exposure and indoor microenvironmental characteristics.
"Estimation of Long-Term Aerosol and Elemental Exposures for Toronto, Canada Residents", Clayton, C. A., Pellizzari, E. D., Mason, R. E., Rodes, C. E., Lawless, P. A. and L. L. Piper, presented at AWMA Specialty Conference - Measurement of Toxic and Related Air Pollutants, April 29, 1997, Research Triangle Park, NC.
"Personal, Indoor and Outdoor Aerosol Sampling for the NHEXAS with Preliminary Mass Concentration Data", Rodes, C. E., Lawless, P. A., Pellizzari, E. D. and K. W. Thomas, presented at the Joint SRA/ISEA Conference, Session I9 - NHEXAS I, paper I9.05, New Orleans, LA, December 12, 1996.
"Aerosol Sampling Biases in Personal Exposure Measurements", Rodes, C. E., Peters, T. M., Lawless, P. A., and L. Wallace, presented at the Joint SRA/ISEA Conference, Session K3 - Exposure to Particulate Matter, paper K3.03, New Orleans, LA, December 12, 1996.
"Biases in Personal Aerosol Air Exposure Sampling", Rodes, C. E., Lawless, P. A. and Peters, T. M., presented at A&WMA Conference Measurement of Toxic and Related Air Pollutants, Session 15 - Human Exposure, Research Triangle Park, NC, May 9, 1996
"An Assessment and Source Apportionment of Airborne Particulate Matter in Cairo, Egypt", by Charles E. Rodes, Mahmoud M. Nasralla, and Philip A. Lawless, PhD, final project report under Environmental Health Project activity 133-RC submitted to USAID Cairo Mission, May, 1996.
"Population-Based Exposure Measurements in EPA Region 5: A Phase I Field Study in Support of the National Human Exposure Assessment Survey", by E. Pellizzari, P. Lioy, J. Quackenboss, R. Whitmore, A. Clayton, N. Freeman, J. Waldman, K. Thomas, C. Rodes, and T. Wilcosky, Journal of Exposure Analysis and Environmental Epidemiology, Vol. 5, No. 3, pp. 327-358, September, 1995.
"Experimental Considerations for the Study of Contaminant Dispersion Near the Body", by C. Rodes, R. Kamens and R. Wiener, Air and Industrial Hygiene Association Journal, Vol. 56, pp. 535-545, June, 1995.
"Sampling and Analysis of Particulate Matter", by C. Rodes and J. Chow, Chapter 4, in the US Environmental Protection Agency/Environmental Criteria and Assessment Office, report EPA/600/AP-95/001a, Air Quality Criteria For Particulate Matter, Research Triangle Park, NC, April, 1995.
"Indoor Aerosols and Aerosol Exposures", by R.W. Wiener and C.E. Rodes, Chapter 30, pp. 659-689 in Aerosol Measurement, edited by K. Willeke and P. Baron, Van Nostrand, 1993
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