A 29-year-old city maintenance worker jumped to his death from the city hall building in Costa Mesa, Calif., yesterday, after learning that he was among more than 200 city workers who are to be laid off. Authorities did not identify the man, except to say he had worked for the city for four years. The city sent layoff notices to roughly half its employees yesterday, including 90 firefighters, 12 jail staffers, 30 dispatchers, and 50 maintenance workers, as part of a plan to outsource 18 city services, KTLA-TV reports. (More suicide stories.)