Stolen Chemical A Big Potential Hazard Hazmat Teams Prepare For Hydrogen Fluoride To Be Found Posted: 3:11 p.m. EDT July 1, 2002 Updated: 10:00 a.m. EDT July 3, 2002 GREENVILLE, S.C. -- The whereabouts 500 pounds of a dangerous chemical and the people who stole it were still a mystery Tuesday to Greenville County, state and federal authorities.Investigators are concerned about finding the material and about what might happen when they do. The five navy blue cylinders of hydrogen fluoride were taken from National Welders Supply on White Horse Road sometime Thursday night or Friday morning. Company managers said they...