I have 25 years of experience and specialize in the field of environmental engineering with specific knowledge of contaminant releases, contaminant dispersion in air, water and soil, and exposure assessment. I have published on such topics as air, water, soil and sediment pollution, contaminant release and movement in the environment, and assessment and remediation of contaminated sediments. I have testified 10 times on topics such as air dispersion, contaminated soil and sediments, and groundwater contamination.