"The Chemical Safety Board undertook the responsibility to investigate the accident and report to the community," Carper said. "There were two deaths. I don't think it takes a lot of brilliant detective work to know there were terrible mistakes made that resulted in that incident.
"I filed a complaint with the U.S. Attorney's Office," he said. "I was hopeful the U.S. Attorney's Office would do something about it. I filed a complaint with the Chemical Safety Board to do what they said they would do - issue a timely report. So they're all different but they're all related, they're about the same place.
"It would have been much better if they had issued a report and we could put this behind us. I am fearful about what will happen to that plant for a lot of reasons. It does not help to have this uncertainty hanging over it."
During his July visit, Moure-Eraso said he was not sure when the board would release a report on the Belle incidents. One of those incidents - the sudden release of phosgene - resulted in the death of DuPont employee Danny Fish.
Moure-Eraso said in July, "One of the issues we've dealt with is the fact that the same investigative team that attended to the Bayer investigation also had to take authority of the incident at DuPont. Of course this is a lot of additional work and contributed to us having to have a longer time to finish a report. I am focusing on the Bayer issue now."
On Monday the board's Cohen said work is proceeding on the Belle investigation "and the team expects the final report to have completed the review process by no later than the end of the first quarter, March 31, 2011, although it is working for completion well before that date.
"Team members were pulled off this investigation several times for brief period to participate in other investigations, causing the delay," Cohen said.
The safety board's website lists 17 open investigations, including the Institute and Belle probes and an investigation into the April 20 explosion and fire on the BP/Transocean Deepwater Horizon oil rig in the Gulf of Mexico. That accident resulted in the deaths of 11 workers and a massive oil spill.
Contact writer George Hohmann at busin...@dailymail.com or 304-348-4836.