Courtney Herring, a graduate student in the Voiland School of Chemical Engineering and Bioengineering, is investigating the chemical composition of diesel and gasoline exhaust mixtures. Herring conducted a series of experiments at the Lovelace Respiratory Research Institute in New Mexico, running engines under a variety of conditions to see how the chemical composition of the exhaust changed. Led by Timothy VanReken, in the Department of Civil and Environmental Engineering, the researchers are studying the link between health concerns and specific chemicals in the exhaust. In particular, the researchers are measuring what engine conditions might contribute to or worsen the formation of cancer-causing compounds. Researchers at WSU are involved in the project because of their ability to accurately measure gas and the particle phase of the exhaust. The work is part of a large project funded by the Environmental Protection Agency.