Records indicate that officials could not conclusively determine the source of the ignition that led to the explosion.
But OSHA said Central Environmental used improper headlamps "for illumination during hours of darkness when checking brine tank levels." Nearby residents said the explosion that killed Hopkins occurred about 6:45 p.m. DEP inspectors arrived onsite about 8:45 a.m., records show.
OSHA also issued two "other than serious" citations that involved not having proper employee training on the use of fire extinguishers and having an electrical receptacle without a faceplate. Those carried no proposed penalties.
EQT calls itself "a major player in the Appalachian Basin," with more than 3.5 million acres of drilling rights in Kentucky, Pennsylvania, Virginia and West Virginia.
Parkersburg-based Central Environmental says it is "a leading provider of a comprehensive suite of environmental, transportation, energy and industrial services," including the management of gas industry wastewater."
Between 2003 and 2011, the most recent figures available, at least 17 workers in West Virginia's oil and gas industry were killed on the job, according to an analysis by the U.S. Department of Labor's Bureau of Labor Statistics.
Reach Ken Ward Jr. at kw...@wvgazette.com or 304-348-1702.