Overview
- The leak at Catalyst Refiners in Institute, which began around 9:30 a.m. Wednesday, left two workers dead and triggered a large hazmat response.
- Officials said nitric acid mixed with a substance identified as M2000A during tank decommissioning, producing hydrogen sulfide gas inside the building.
- At least 21 people were evaluated or hospitalized, including seven EMS responders, with one person in critical condition and officials later reporting that more than 30 sought care.
- A one‑mile shelter‑in‑place that covered nearby neighborhoods and West Virginia State University was lifted after air monitoring improved and roads started to reopen.
- OSHA and state agencies have opened investigations, and owner Ames Goldsmith said it is cooperating as the secured site remains under review.