Confined Space Case

The tank was located on the second floor and was part of a chicken processing operation at a rendering plant. The inside of the tank measured 8 feet high by 6-1/2 feet in diameter. The bottom of the tank was cone-shaped and sloped outward at a 120-degree angle. The to of the tank was covered with loose plate steel, one-third of which had been removed just prior to employee’s entry. Employee was to enter the tank to repair a hole in the bottom. The only witnesses to this operation were two other employees who observed from outside the tank. Upon entering the tank, the employee was immediately overcome by a gaseous, oxygen-deficient atmosphere. When he tried to climb out, he fell backward into the tank and apparently lost consciousness. Local authorities were unable to revive him. The gas present in the tank was identified as methane.
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