Times Observer photo by Brian Ferry A City of Warren Fire Department engine is on standby at United Refining Company Tuesday night after a hazardous materials call at 10 p.m. According to the company, a small tank failed, releasing a partially-processed crude oil product.

There was a reportedly small and contained release of some processed oil products at United Refinery Tuesday night, resulting in multiple agencies responding to help or evaluate.

City of Warren Fire Department responded to a hazardous materials call late Tuesday.

“A small tank at one of the company’s process units failed at approximately 10 p.m. Tuesday night, resulting in a spill of partially processed crude oil,” United Spokesperson Rob Kaemmerer said Wednesday. “The spill was contained on-site and no hazardous materials were released to the environment, including the Allegheny River, during the incident.”

In addition to the fire department, Warren County Public Safety, Pennsylvania Department of Environmental Protection and Fish and Boat Commission, and U.S. Environmental Protection Agency were notified.