Three oil field workers died after breathing carbon monoxide (CO) gas in an oil well cellar in California. How It Happened: The incident occurred during perforation, a procedure to create holes in the pipe in the well to allow the well to be used for water disposal. During the procedure, water began flowing from a valve in the cellar. The first worker, age 22, entered the cellar to turn off the valve. Upon entering the area, he collapsed and fell into the cellar. A second worker, age 24, entered the cellar to assist the first worker, but he also collapsed. A third worker, […]