Tannery Workers Killed by Hydrogen Sulfide Two workers died trying to fix a wastewater valve housed in a manhole. Tannery workers routinely entered the manhole to waist height to adjust the flow by turning a wheel, but the atmosphere below was deadly. The victims were to fix a cracked pipe in the manhole. Investigators say the first victim descended into the confined space and collapsed almost immediately. The second worker entered in a rescue effort but was also overcome. At lunchtime, the foreman saw the second worker in the manhole, but couldn't see the first man, submerged in water at the bottom. The […]