In Wednesday's report, board investigators noted 17 other deaths in dust incidents the agency is examining, including three in a December explosion that killed three workers at the AL Solutions Inc. metals recycling plant in New Cumberland, Hancock County.
The AL Solutions facility recycles titanium and zirconium for use in the metals industry, and the new CSB report identified the December incident as involving "titanium powder."
Daniel Horowitz, a board spokesman, said CSB investigators believe there are similarities between the Hoeganaes incidents and the one at AL Solutions, including the failure to control accumulations of combustible metals dust.
In its 2006 report, the CSB urged OSHA to adopt a broad rule to protect workers in all sorts of industries from the potential dangers of combustible dust. So far, OSHA has not proposed such a rule. Instead, the agency is relying on what it says are stepped up training efforts and inspections.
But in their report Wednesday, the safety board said OSHA did not include the iron and steel mill industry classification -- covering plants like Hoeganaes -- in its national emphasis program for dust inspections.
Leni Uddyback-Fortson, an OSHA spokeswoman, said her agency "looks forward to reviewing the CSB report.
"Combustible dust explosions continue to be an area of high concern for OSHA," she said. "We will continue to inspect facilities under the combustible dust national emphasis program while also pursuing combustible dust rulemaking."
Reach Ken Ward Jr. at kw...@wvgazette.com or 304-348-1702.