Following the Department’s review of a facility’s Top-Screen submission, the facility may be notified in writing that it is required to complete and submit a Chemical Security Assessment Tool (CSAT) Security Vulnerability Assessment (SVA). A facility that receives such a letter is initially considered high-risk and preliminarily assigned to Tier 1, 2, 3, or 4. Unless specifically notified by the Department to the contrary, the SVA must be submitted within 90 calendar days from the date of written notification. Preliminary Tier 4 facilities, however, may elect to submit an Alternative Security Program in lieu of an SVA.

Notwithstanding the SVA submission deadlines, any facility that comes into possession of an Appendix A Chemical of Interest at or above the applicable Screening Threshold Quantity has 60 days to complete and submit a CSAT Top-Screen to the Department.

If a facility would like to request an extension for the Department's consideration, formal letters can be sent via regular mail to:

Department of Homeland Security
Chemical Security and Compliance Division
Mail Stop 8100
Washington, D.C. 20528-8100

• Review CSAT SVA Questions (PDF, 105 pages - 368 KB)
• Review CSAT SVA Application Instructions January 3, 2011 (PDF, 118 pages - 1.43 MB)