NEENAH, Wis. (AP) — An alleged chemical mixture inside a Neenah plant sent three employees to the hospital and forced the evacuation of workers and some residents living near the facility. The Neenah-Menasha Fire Rescue received a medical call about noon Wednesday reporting a sick employee at Galloway Co.. Fire chief Kevin Kloehn says hazmat crews have been sent to the scene to investigate whether chlorine was erroneously emptied into a tank filled with acid. Three employees were treated and released. Kloehn says the plant and residents within two blocks downwind of the facility were evacuated and brought to a nearby middle school.