Rules demand workers be trained - By CLIF LeBLANC, The State, SC
Experts say companies also must test air quality in tight spaces
An autopsy showed Howell died of asphyxiation in a 200-gallon tank at a home in western Lexington County near Lake Murray, the county coroner's office said.
Oxygen readings inside the tank hovered around 18 percent, county Fire Chief David Fulmer said.
Federal safety regulations require monitors with alarms when entering a tank whose oxygen content dips below 19.5 percent.
"Anything below 19.5 percent is unsafe," Fulmer said.