Abstract: At approximately 4:30 p.m. on October 29, 2008, Employee #1, a shipping receiving clerk, was at her work station performing her normal duties. Employee #1 was located in the back of the workplace near the loading docks. A roll-up door was fully open. Employee #1 started the work day at approximately 9:00 a.m. and, at approximately 9:30 a.m. began experiencing symptoms of chest tightening and difficulty in breathing. Toward the end of the work day, Employee #1 experienced unbearable pain in the chest and was unable to take deep breaths. With a history of asthma, Employee #1 self-administered the asthma medication (inhaler). Several puffs of the medication did not help with the breathing. Employee #1 then felt nauseous, started shaking and was unresponsive to a coworker. Employee #1 experienced an asthma attack and was unable to breathe. Employee #1 was treated at the hospital but was not hospitalized.