Extremely Hazardous Substances (EHS)
These substances are regulated by the Environmental Protection Agency (EPA) under the Federal Emergency Planning and Community Right to Know Act (EPCRA) Section 302. Facilities that possess a Threshold Planning Quantity (TPQ) of an EHS are subject to federal emergency planning requirements. TPQ’s are calculated based on the aggregate amount of an EHS substance at the facility at one time. Facilities in Oregon are required to identify whether or not they are subject to these requirements on the Oregon Hazardous Substance Information Survey (HSIS).
For more information about EHS’s:
For information about reporting EHS substances in Oregon:
Clean Air Act (CAA) Section 112r
Section 112r of the Clean Air Act requires facilities that produce, handle, process, distribute, or store certain chemicals to develop a Risk Management Program, prepare a Risk Management Plan (RMP), and submit the RMP to the EPA. Facilities are subject to this requirement if they possess a Threshold Quantity (TQ) of a substance found on the 112r list. Facilities in Oregon are required to identify whether or not they are subject to these requirements on the Oregon Hazardous Substance Information Survey (HSIS).
For More Information about 112r substances:
For more information about reporting 112r substances in Oregon: