Exxon Mobil Corp. agreed to pay $400,000 in penalties to California for environmental violations at its Torrance refinery. Exxon Mobil also agreed to spend a maximum of $2 million on supplemental environmental projects intended to cut excessive emissions of carbon dioxide and other pollutants at the refinery. The company paid $250,000 for a March 22, 2007 incident that caused the release of nitrogen oxides, carbon dioxide and other substances. In addition, Exxon Mobil paid $150,000 to settle 23 air permit and air quality violations at the Torrance facility that occurred between October 2005 and October 2006.