CES specializes in innovative solutions to air quality problems by using source characterization. Modeling examples include: development of plume simulating dilution stack sampler, tunnel and dynamometer studies of automotive emissions, and compilation of source composition libraries.
With source apportionment and CMB analysis techniques, CES can locate and measure sources of metal emissions based on unique chemical profiles.
CMB Receptor Modeling:
CES uses the latest CMB version (CMB-7) in its source apportionment modeling. Whether the study is of a pristine Oregon wilderness or an industrial lead smelter in Missouri, CES can develop sampling protocols, organize the analysis, and complete the modeling. CES personnel have:
Directed more than 100 airshed source apportionment studies in the U.S., Mexico, Canada, and Brazil.
Managed source apportionment studies of numerous copper and lead smelter operations throughout the western U.S.
Conducted chemical mass balance on Three Sisters National Forest for U.S. Forest Service.
Developed and conducted the Portland Aerosol Characterization Study.
Taught numerous short courses on receptor modeling in the U.S., Canada, and Brazil.
Co-authored EPA’s demonstration of dispersion and receptor model reconciliation.
Dr. Cooper is an internationally recognized receptor model authority and has:
Served as Project Manager for more than 100 source apportionment studies in the US, Brazil, Canada and Mexico.
Taught numerous receptor modeling courses at industrial sites, conferences and universities across the U.S.
Co-authored EPA's first source profile library.
Developed the first source profile library for California's South Coast Air Basin.
Served as principal investigator for the Portland Aerosol Characterization Study.
Click here for a detailed discussion of CMB Receptor Modeling
X-Ray Fluorescence Analysis of Air Monitoring Filters:
CES' primary analytical focus is providing x-ray fluorescence (XRF) measurements of trace elements on air monitoring filters. CES personnel have been responsible for tens of thousands of XRF filter analyses over the past 30 years, and have contributed to XRF's acceptance as an analysis technique by coordinating XRF interlaboratory comparisons, organizing NSF workshops on X-ray methods, and teaching short courses and graduate level classes on XRF methods of environmental analysis.
CES uses a Spectrace QuanX energy dispersive XRF analyzer for all filter measurements. CES' XRF instrumentation is capable of analyzing particulate deposit diameters ranging from 0.1 cm to 20 cm including circular streaker samples and continuous sampling system disks as well as standard 25, 37, and 47 mm diameter filters.
A brochure outlining the CES XRF program (in adobe acrobat *.pdf format) is available for you to download here.
CES's Quality Management Plan demonstrates our commitment to rigorous Quality Control/Quality Assurance.
Additional Analytical Services Provided Through CES:
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