Updated: The Ohio Environmental Protection Agency will be in Middletown today.
Forty-five year-old Thomas Rogers was killed at United Waste Treatment services after coming into contact with hydrogen sulfide.
The chemical release kept neighbors confined to their homes for several hours.
FROM FOX 19 NEWS --- A worker at a Middletown plant has been killed in a chemical accident.
It happened at United Waste Water Services this morning.
Police say a chemical reaction led to the release of hydrous sodium sulfide, which was fatal to one person.
The toxic release also led officials to issue a shelter in place order for people living near the plant, who were advised to stay inside and close their doors and windows.
Two Middletown firefighters were slightly injured and treated and released.