University of California, Riverside

Center for Environmental Research & Technology

Dennis Fitz

Researcher, Atmospheric Processes

Dennis FitzDennis Fitz received his Master's degrees in both Organic Chemistry and Applied Sciences at the University of California, Riverside. The Atmospheric Processes group he manages conducts research to determine the fate of air pollutants after they are emitted into the atmosphere using measurements and modeling. The current research includes determining the reactivity of VOC to form ozone and particulate matter in smog chambers and evaluating and developing measurement methods to better characterize products formed in photochemical air pollution.

The group also conducts studies to determine emission rates from fugitive sources into the atmosphere. Mr Fitz's research focuses on developing and applying methods to accurately measure trace pollutants in the atmosphere. He recently developed and constructed analyzers for measuring NO2 and PAN for the Central California Ozone Study (CCOS) and is also measuring concentrations of hydrogen peroxide, formaldehyde, nitric acid and nitrogen dioxide for the Study using a tunable diode laser absorption spectrometer (TDLAS). Other current projects include using a novel fabric denuder to determine emission rates of ammonia from fugitive sources, developing a ceramic denuder to measure nitric acid in real time, measuring NOx in southern California, determining the fugitive particulate emissions from vehicles on paved roads, and using a LIDAR to determine the fate of particulate matter generated from unpaved roads and tilling operation.

He was the Principal Investigator for three key projects for the Southern California Oxidant Study (SCOS97-NARSTO), a major research effort to characterize the area's air pollution. These projects involved monitoring ozone aloft using balloon-based monitors, measuring various components of nitrogenous species (nitric acid, ammonia, PAN, and NOx combined), and performing detailed speciation of volatile organic compounds. Other completed projects include determining emission factors of fine particulate matter from roadways and whether street sweeping is effective in reducing these emission rates. Under previous ARB funding, Mr. Fitz evaluated the CADMP (California Acid Deposition Monitoring Program) and Two-Week samplers in addition to developing a novel diffusion denuder sampler for semi-volatile species such as ammonium nitrate, nitric acid and ammonia.

Before rejoining the University of California in 1993, Mr. Fitz was the manager of Atmospheric Measurements at AeroVironment Inc., a consulting firm specializing in air pollution research. While at AeroVironment, he managed or participated in many major air monitoring research field studies. These include developing particulate and gaseous pollutant sampling equipment for the Southern California Air Quality Study (SCAQS), Western Regional Air Quality Study (WRAQS), its successor SCENES, and the Navajo Generating Station Visibility Study. He also designed the air quality measurement system for the Biosphere 2 project near Tucson, Arizona, and managed projects to measure air toxics. Until joining AeroVironment in 1985, Mr. Fitz was a Research Specialist at APRC. He was program manager or co-investigator for research projects involving smog chambers, ambient pollutant measurements and methodology to determine the fate of air pollutants in the atmosphere. Mr. Fitz has written or presented over forty technical papers in addition to preparation of dozens of project-generated reports.

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University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

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Center for Environmental Research & Technology
1084 Columbia Avenue
Riverside, CA 92507
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Tel: (951) 781-5791
Fax: (951) 781-5790

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