April 15, 2012:

Exxon Mobil Corp. (XOM) reported the power failure of a compressor led to the release of 100 pounds of hydrogen sulfide into the atmosphere at its refinery in Beaumont, Texas, according to a filing with the National Response Center. The incident happened at 10:35 a.m. local time yesterday, the filing said.

U.S. refineries must notify the response center if they release hazardous substances in excess of reportable quantities, according to the

By Bloomberg