AMES, Iowa (AP) — Authorities have reopened a portion of Highway 30 near Ames after a plume of gas from a chemical leak dissipated. Crews responded to a business at the Iowa State University Research Park shortly before noon Friday after a hydrochloric acid and sulfuric acid chemical leak spread over the area. Water was sprayed to diminish the plume.

Des Moines television station KCCI says a delivery driver was dropping off the chemicals at a business when the two accidentally mixed. The driver of the delivery truck was taken to a local hospital as a precaution.