Zonolite and W.R. Grace Sites as Reviewed by ATSDR
The former Zonolite and W.R. Grace site is part of ATSDR's National Asbestos Exposure Review (NAER). Under the program, more than 200 sites around the United States that received vermiculite ore mined in Libby from the early 1920s until 1990 are being evaluated. More information about NAER is available on-line at
Courtesy of The ATSDR
Asbestos waste rock contamination can be very dangerous