At 7:30 p.m. on July 2, 2021, Employee #1, Employee #2, and Employee #3 performed two maintenance tasks in the M2 crude rectification section on the ground and second levels at tower M2-T250 and vessel V-207. On July 2, 2021, during the night shift, three (3) gas monomer chemical operators were exposed to toxic fluorocarbons and other hazardous chemicals while performing the maintenance tasks at M2-T250, which resulted in delayed respiratory failure.
When returning T250 to normal operations, three employees were exposed to unknown and known acute toxic chemicals, due to inadequate safe work practices and respiratory protection, identified as expected to be in the process streams such as, but not limited to: