Hazmat crews responded to Precious Metal Plating located at 2635 South Orange Avenue following the blast and evacuated employees.
Nineteen employees were treated after they were exposed to chemicals. Two victims were transported to Western Medical Center with minor skin irritation after chemicals splashed on them. The remaining employees were treated and released at the scene.
The Orange County Fire Authority was called to the scene. The investigation into the source of the explosion is ongoing but authorities say one of the chemicals overheated and caused the explosion.