The American Residential Services and American Mechanical Services segment of ServiceMaster Co. reported a 3 percent increase in revenues for the first six months of 2004, a total of $334 million. For the second quarter, there was a 4 percent increase from 2003 figures, a total of $180 million. For the first half of the year, the segment reported a loss of $2 million, compared to an operating income of $3 million in 2003. This decline was due primarily to cyclically depressed project margins at AMS and higher marketing, fuel and insurance costs at ARS. Operating income for the quarter was $2 million, compared with $4 million in 2003.