May 11 (Reuters) - BP PLC :
* Cherry point refinery at Blaine, Washington, reportsemissions due to an unspecified start up on Saturday
* Refinery reports a 1000 pound release of nitrous oxidesfrom two sources, a high pressure flare, and the number twohydrogen flare.
Refinery capacity:225,000 barrels per daySource: U.S. refinery filing - National Response Center (NRC),made public on MondayRelated story - BP reports tail gas unit malfunction at CherryPoint, Wash. refinery (Reporting by Anupam Chatterjee in Bengaluru)