At 8:30 a.m. on May 24, 2018, Employee #1, 45, set up a booth representing the control laboratory for a safety day event at the plant, which involved approximately 1,000 employees, visitors, and vendors. Employee #1 wanted a fog effect at the booth to attract visitors.
Employee #1 made plans to have coworker #1 get dry ice for the effect. When coworker #1 could not get dry ice, coworker #1 asked coworker #2 to get liquid nitrogen from an adjacent lab. Even though the control lab does not use nitrogen, Employee #1 knew it was available at the development lab.