Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What is the Area of Highest Quantity (AHQ)?

April 26, 2017ahq area Highest quantity

0

Posted

What is the Area of Highest Quantity (AHQ)?

1 Answer

0

Posted

The Area of Highest Quantity (AHQ) is defined as an area within a radius of 170 feet in which the greatest amount of a release-COI is located. The same counting rules that a facility applies in determining whether it meets or exceeds the applicable STQ for release-COI, also applies when compiling the AHQ. The CSAT Top-Screen requests this information for release-toxic, release-flammable, and release-explosive COI. Attachment A of the Top-Screen User’s Manual at http://www.dhs.gov/xlibrary/assets/chemsec_csattopscreenusersmanual.pdf contains useful worksheets and examples to help facilities compile and report the AHQ for release-COI.