Threshold Planning Quantity 4 : The minimum amount of an extremely hazardous substance that must be reported under the provisions of Section 302 of Public Law 99-499 (SARA, Title III)
City of Chandler, Emergency Operations Plan, Glossary, Chandler, Arizona, USA 2007. https://www.chandleraz.gov/Content/EmergencyOpsPla n.pdf, (Emr Mgt/ ND and Other Dzstr - Amer) {970}