Emergency response (HAZWOPER)
A response by people from outside the immediate area to a release that is, or is likely to be, uncontrolled.
Definition, in the source's words
29 CFR 1910.120(a)(3)(opens ecfr.gov in a new tab)“Emergency response or responding to emergencies means a response effort by employees from outside the immediate release area or by other designated responders (i.e., mutual-aid groups, local fire departments, etc.) to an occurrence which results, or is likely to result, in an uncontrolled release of a hazardous substance. Responses to incidental releases of hazardous substances where the substance can be absorbed, neutralized, or otherwise controlled at the time of release by employees in the immediate release area, or by maintenance personnel are not considered to be emergency responses within the scope of this standard.”
What it means
The incidental-release exclusion is the key exam point: a small spill controlled at the time by people in the immediate area, or by maintenance, isn't an emergency response, so 1910.120(q) doesn't apply to it.
Example
A worker knocks over a 1-gallon container of a known solvent and absorbs it with the spill kit at the workstation: an incidental release. A ruptured tank line that forces an evacuation and brings in the plant HAZMAT team is an emergency response.
Where it appears on the exam
ASP: ASP11 Domain 7, Environmental Management
Practice: Hazardous Waste Operations (HAZWOPER)
CSP: CSP11 Domain 7, Training
Practice: HAZWOPER Training, Emergency Response Plans and Incident Command
CHST: CHST5 Domain 2, Emergency Preparedness, Incident Investigation, and Response
Practice: Emergency Response to Hazardous Releases
Questions
- Is cleaning up a small spill an emergency response?
- Not if the substance can be absorbed, neutralized or otherwise controlled at the time of release by employees in the immediate area or by maintenance personnel. That's an incidental release.
Related
Checked 2026-10-16. Spot a problem? Email hello@passcited.com.