I have 30 years of experience, and specialize in the field of environmental contaminants with specific knowledge in the areas of PCBs, metals and radioactive materials. I have published on such topics as PCBs, groundwater contamination and analytical techniques. I have testified on groundwater contamination (deposition). Although I have not testified, I have been deposed once, and I have served as an expert witness several times. I have also been hired as a consultant numerous times. Perhaps the most remarkable aspect has been the diversity of topics.