Abstract: At approximately 12:05 p.m. on August 10, 2021, Employee #1, a 15-year veteran at a chemical manufacturing facility, was mixing magnesium and calcium powder in a 3,500-gallon tank. While adding EDTA powder and liquid caustic soda (sodium hydroxide), the tank reached a temperature around 190 degrees Fahrenheit. Upon turning on the cooler, liquid erupted from a pressure relief valve, hitting Employee #1 on the shoulders, back, and head. He was initially taken to a clinic and transferred to Torrance Memorial Medical Center's burn unit, where he spent two nights. A Serious Accident Related citation was issued due to inadequate drainage from the pressure relief valve, which didn't prevent exposure in case of overflow.