I have 31 years of experience and specialize in the field of environmental science with specific knowledge in the areas of hydrogeology, oil spills and gas leaks, and cost recovery. I have published on such topics as oil spills and gas leaks, hydraulic fracking, heavy metals, acid mine arainage and assessment, and remediation of soils and groundwater. I have testified 6 times on topics such as cost recovery, hydrogeology, erosion control, soil contaminants and soil vapor exposure to workers.