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A new Homeland Security anti-terrorism rule was adopted in 2007 providing the federal government with the authority to secure chemical facilities and other entities to protect against the threat of terrorism. The reporting deadline is Jan. 19, 2008. A list of over 300 common chemicals, or chemicals by concentration in some cases, is included in a document called Appendix A. Exceeding the screening threshold quantity means a facility owner/operator must complete the on-line assessment in order to determine a facility?EUR??,,????'?????<???EUR?s security threat classification. All facilities are urged to review the list of chemicals in Appendix A to see whether any chemical STQ is exceeded. For example, if a golf facility posesses ammonium nitrate (used as a fertilizer), at an STQ of 2,000 lbs, or propane at an STQ of 7,500 lbs, they must complete the assessment. Phosphorus is also included in Appendix A, however, this type of phosphorus ?EUR??,,????'?????<???(R) white phosphorus (as determined by its Chemical Abstract Service number) ?EUR??,,????'?????<???(R) is a flare- and smoke-producing incendiary weapon or smoke-screening agent and is not used on golf courses. Any facility that manufactures, uses, stores, or distributes a chemical listed in Appendix A at or above the STQ listed must complete the Top Screen questionnaire by Jan. 19, 2008 or face stiff DHS penalties and inspections. DHS will review the Top Screen submittal and determine which of four risk-based tiers to categorize the facility. Tier status will then dictate regulatory requirements including the need to prepare a Site Security Plan and whether the facility will be subject to DHS audits and inspections. To learn more about the DHS Chemical Facility Anti-Terrorism Standards and review Appendix A, visit www.dhs.gov/xprevprot/laws/gc_1166796969417.shtm
A new Homeland Security anti-terrorism rule was adopted in 2007 providing the federal government with the authority to secure chemical facilities and other entities to protect against the threat of terrorism. The reporting deadline is Jan. 19, 2008. A list of over 300 common chemicals, or chemicals by concentration in some cases, is included in a document called Appendix A. Exceeding the screening threshold quantity means a facility owner/operator must complete the on-line assessment in order to determine a facility?EUR??,,????'?????<???EUR?s security threat classification.
All facilities are urged to review the list of chemicals in Appendix A to see whether any chemical STQ is exceeded. For example, if a golf facility posesses ammonium nitrate (used as a fertilizer), at an STQ of 2,000 lbs, or propane at an STQ of 7,500 lbs, they must complete the assessment. Phosphorus is also included in Appendix A, however, this type of phosphorus ?EUR??,,????'?????<???(R) white phosphorus (as determined by its Chemical Abstract Service number) ?EUR??,,????'?????<???(R) is a flare- and smoke-producing incendiary weapon or smoke-screening agent and is not used on golf courses.
Any facility that manufactures, uses, stores, or distributes a chemical listed in Appendix A at or above the STQ listed must complete the Top Screen questionnaire by Jan. 19, 2008 or face stiff DHS penalties and inspections.
DHS will review the Top Screen submittal and determine which of four risk-based tiers to categorize the facility. Tier status will then dictate regulatory requirements including the need to prepare a Site Security Plan and whether the facility will be subject to DHS audits and inspections. To learn more about the DHS Chemical Facility Anti-Terrorism Standards and review Appendix A, visit www.dhs.gov/xprevprot/laws/gc_1166796969417.shtm
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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