An explosion at Quick Turn Anodizing and Black Oxide Coatings in Guthrie, Kentucky Jan. 18 killed one person and injured four others.

According to WHOP radio, Guthrie Police Chief Dean Blumel says a “truck was off-loading cutting grease into a stainless steel tank outside when lye somehow got into the mixture and caused the explosion.” The chief says the tank was blown through the building and came to rest indoors on the other side of the structure.

The station reported that Todd County Coroner Timothy Wells confirmed one fatality, two people were taken to Tennova Health Hospital in Clarksville, and one person was transported to Vanderbilt University Medical Center in Nashville.

According to the Todd County Emergency Management Agency:

Facility security photo shows the fire after the explosion.Facility security photo shows the fire after the explosion.Starting around noon a vacuum truck waste hauler from Onsite Environmental was removing a alkaline lye solution from a holding tank at the Quick Turn Anodizing facility on 2nd street. Near the end of that process, at a few minutes before 1:00 what was described as white smoke or steam was seen coming from the area of the truck which was parked directly in front of the building. Within minutes the tank containing approximately 300 gallons of the solution catastrophically failed at it’s end cap seam. The end cap flew approximately 125’ to the north landing in a vacant lot the remainder of the tank went through the exterior of the building, through an interior partition hit a support beam and finally coming to a stop about 100’ away just short of exiting the rear of the building. The fatality occurred when this flying tank struck two employees working near the center of the facility. Also injured were the driver of the truck who was standing near it and was thrown into the vacant lot, a Guthrie city employee who had seen the initial smoke and went to investigate and another Quick Turn employee who was inside the building."

TheTodd County Emergency Management Agency says the investigation into the cause is ongoing by the Kentucky State Fire Marshall and the Kentucky Environmental Cabinet. "At this time it is believed that for some reason an organic fat such as cooking oil became mixed with the alkaline waste water in the tank which resulted in an exothermic saponification reaction. This reaction raised the temperature inside the tank causing the water portion of the solution to boil. This raised the pressure inside it to a point beyond its designed strength resulting in the failure of the tank seam," the agency says.
 
The Quick Turn Anodizing and Black Oxide Coatings company’s website says, “QTA’s staff have a vast knowledge of global Mechanical Engineering and metal processing experience and expertise in implementing global Quality Systems, Toyota Productions System Lean Manufacturing, Lean Six Sigma, ISO 9001, Value Analysis/Value Engineering, and the Toyota Production System Tools and methodology.”