While conceding that “incidents involving ammonium nitrate may be among the most severe and highest-profile accidental releases both in the United States and around the world,” the Environmental Protection Agency proposes leaving the highly explosive chemical unregulated as it updates rules covering the storage of hazardous substances. In a report to be released Tuesday, a pair of national environmental organizations points to the Jan. 31 Winston Weaver Co. fire as clear evidence that the EPA’s approach puts lives and communities at grave risk. “Companies should be required to disclose the presence of ammonium nitrate at their facilities and have approved risk management plans in place to protect workers and surrounding communities,” Coming Clean and the Environmental Justice Health Alliance for Chemical Policy Reform note in their 19-page report.