Found guilty of violating Quebec Fisheries Act after crude oil leaked into the Megantic Lake and Chaudiere River.
Face charges of conspiracy, endangerment and Clean Air Act violations.
Authorities say a crew hit the gas line at a construction project.
Explosion occurred at a facility owned by Ontario-based Midland Resource Recovery.
Accident was triggered by an explosion of a liquefied gas tanker.
Building was destroyed, more than a dozen hurt in the blast.
Other explosions have occurred at Lake City Army Ammunition Plant.
Three people were killed Apr. 3 when the van-sized boiler blew up at Loy-Lange Box Co. in St. Louis.
Incident involving carbon monoxide gas used in production is under investigation.
A small bag of acetylene placed in a temporary fabrication building caused a small explosion.
Authorities have not discovered any fatalities.
Blast occurred in paint shop; sheriff says the scene is safe.
A tank failed within the larger, second-stage liquid oxygen tank.
Facility manufactures and packages aerosol, liquid and other specialty chemicals.
Massive explosion last year at a chemical warehouse killed 173 people.