How is the STQ calculated for Ammonium nitrate as an explosive?
For more information on this topic, please reference page 13 of 41 in the Final Rule, Appendix to Chemical Facility Anti-Terrorism Standards (http://www.dhs.gov/xlibrary/assets/chemsec_appendixafinalrule.pdf) on the DHS Critical Infrastructure: Chemical Security website. Referenced Text: As an explosive, AN presents two security issues: theft/diversion-EXP/IEDP and release-explosive. DHS is treating the possible theft/diversion of this form of AN in the same way that it is treating all other DOT Division 1.1 explosives. Where a facility has larger amounts of AN as an explosive, there may also be release hazards. As that is the case, DHS has set the STQ for the possible release of AN as an explosive at 5,000 pounds. Where AN as an explosive presents a theft-EXP/IEDP security issue, the STQ is 400 pounds, and a facility is expected to include all amounts of ACG of AN when determining whether it meets or exceeds the STQ. And, per ยง 27.203(c), in calculating this theft STQ, facilities need
