Vermiculite, a naturally occurring mineral, was mined and processed in Libby, Montana, from the early 1920s until 1990. This vermiculite, which was shipped to many locations around the United States for processing, contained asbestos. At the Texas Vermiculite Company/W.R. Grace site in Dallas, Texas, more than 396,900 tons of asbestos-contaminated vermiculite were shipped to that … Continue reading Former Dallas Asbestos Vermiculite Plant