On July 24, 2017, at around 11:00 a.m., an employee was preparing to load peracetic acid and peroxide into a plastic tote. He turned the air off, which keeps the plunger from opening up at the bottom of the fill tube, and guided the fill tube into a plastic tote. When he started lowering the fill tube into the tote, the plunger opened up and some chemical came out and splashed him, causing chemical burns to the left side of his neck and left shoulder.