asbestos, Clements High School, Keith Harrell, Limestone County, mesothelioma, Mesothelioma News, protective clothing, respirators, tiles, Tom Sisk, warning sign School Officials Say Removal of Contaminated Tiles Poses No Threat to Students and Faculty By Mesothelioma Cancer Alliance News March 7, 2014 March 7, 2014 Mesothelioma News Asbestos Warning Sign Confuses Students, Causes Concerns Among Parents