Abstract: At approximately 5:40 a.m. on July 17, 2012, Employee #1 was a member of the sanitation crew at Townsend Farms, Inc., an orchard in Fairview, Oregon. The sanitation crew was cleaning the floors in the fresh market processing room. They had started that day at 4:00 a.m. Some of the processing machine operators were also in the room, preparing for the day. The sanitation crew's second electric-powered pressure washer was broken, so one of the teams decided to bring a gas-powered pressure washer into the room. A team consisted of two workers, one spraying and one squeegeeing. The gas engine was run until approximately 5:40 a.m. At 5:40 a.m., Employee #1, who was wielding a squeegee and who was the crewmember working closest to the engine, collapsed. He was moved out of the room, and he received first aid attention. Because he had diabetes, his symptoms were mistaken for a diabetic reaction. At 6:10 a.m. he was transported to the hospital emergency room. He had to be hospitalized overnight, and he received hyperbaric treatment. The carbon monoxide hazard was not recognized at this time, and the other workers went back to work in the room. At approximately 8:00 a.m., the full processing crew of 20 or more employees began to work in the room. At approximately 8:30 a.m., members of this crew began to experience the symptoms of carbon monoxide poisoning. The processing operators on Line #4 were closest to the pressure washer, and these workers were most affected by the carbon monoxide. At this point, someone finally recognized that there was a carbon monoxide problem in the room. The workers in the room were evacuated. At approximately 9:00 a.m., the fire department arrived and began transporting workers to the hospital according to their triage protocol. In all, twenty-three workers were transported to various local hospitals. The four workers near Line #4 had the most serious symptoms.