Is there a relationship or synergistic effect between other carcinogens and mineral fibers or viruses?
(15) Response: The commenter is referring to the Libby Groundwater NPL site, consisting of soil and groundwater contaminated with wood treating fluids at the former Champion lumber and plywood mill (now occupied by Stimson Lumber) [47]. The contamination at this site was discovered in 1979 when, shortly after installation of private wells in the area, homeowners noticed a strong creosote odor in their water. The groundwater contained pentachlorophenol (PCP), polycyclic aromatic hydrocarbons, and heavy metals. The site was listed on the NPL in 1983. Homeowners were connected to municipal water, existing private wells were plugged and abandoned, and the source-contaminated soils were excavated and treated. A city ordinance now prohibits the installation of new wells for drinking water or irrigation. ATSDR concluded in 1993 that the site poses no apparent public health hazard [48]. The main contaminant of concern in the groundwater was PCP, which is toxic to the liver, thyroid, immune and
