COLUMBIA, S.C. — Cayce officials say they don't believe there is an immediate danger from the hazardous materials situation Thursday morning but continue to operated with a high level of caution as they close out the situation.

Officials said they were hoping to open up the area and rescind earlier evacuation orders from nearby homes before 1 p.m.

The City of Cayce Fire Department says the incident happened at Crystal Clean, located at 627 Poplar Street. According to officials at 6:52 a.m. vapors were seen rising from a tanker truck parked at the business. By 7 a.m., fire units were on the scene, and their first priority was to determined what was leaking out.

According to the city, potassium hydroxide and sodium hydroxide were accidentally mixed with cooking oil, creating chemical off

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