Pesticides expert witnesses may write reports and testify on pesticide contamination, insecticides, and pesticide products such as Sulfuryl Fluoride. The EPA has recently proposed rules regarding this pesticide.
The U.S. Environmental Protection Agency has re-evaluated the current science on fluoride and is taking steps to begin a phased-down withdrawal of the pesticide sulfuryl fluoride, a pesticide that breaks down into fluoride and is commonly used in food storage and processing facilities. Sulfuryl fluoride is currently registered for the control of insect pests in stored grains, dried fruits, tree nuts, coffee and cocoa beans, and for use in food handling and processing facilities. Although sulfuryl fluoride residues in food contribute only a very small portion of total exposure to fluoride, when combined with other fluoride exposure pathways, including drinking water and toothpaste, EPA has concluded that the tolerance (legal residue limits on food) no longer meets the safety standard under the Federal Food, Drug, and Cosmetic Act (FFDCA) and the tolerances for sulfuryl fluoride should be withdrawn.
See http://www.epa.gov/pesticides/sulfuryl-fluoride/evaluations.html and Federal Register Volume 76, Number 12 January 19, 2011.