ABM Lakeside Building Maintenance Awarded Contract with Prime Group Realty Trust.

Business Editors

CHICAGO--(BUSINESS WIRE)--Aug. 4, 2003

ABM Lakeside Building Maintenance, a wholly-owned subsidiary of ABM Industries Incorporated (NYSE:ABM), has been awarded a multi-year, multi-million dollar contract for Bank One Center, which is managed by Prime Group Realty Trust (NYSE:PGE). ABM Lakeside will provide building maintenance services for the 1,525,000-square-foot high-rise building located at 131 South Dearborn Street in downtown Chicago.

"We are pleased to serve one of Chicago's largest real estate investment firms," said Michael Sweig, chairman of the board and COO of ABM Lakeside Building Maintenance. "Our staff and management look forward to providing state-of-the-art janitorial services for each of Prime Group Realty's tenants, including Bank One Corporation, at this premier, 37-story office building," he added.

Prime Group Realty Trust (PGE) is a fully-integrated, self-administered and self-managed real estate investment trust which owns, manages, leases, develops and renovates office and industrial property primarily in metropolitan Chicago. The PGE portfolio consists of 15 office properties totaling 7.8 million net rentable square feet, 29 industrial properties totaling 3.9 million net rentable square feet, and joint venture interests in two office properties in Illinois and Arizona, as well as 202.1 acres of developable land and the right to acquire an additional 31.6 acres of developable land.

Based in Chicago, ABM Lakeside Building Maintenance has operations throughout the Midwest in Cincinnati, Cleveland, Columbus, Detroit, Indianapolis, Louisville, Milwaukee, Nashville and St. Louis.

ABM Industries Incorporated is one of the largest facility services contractors listed on the New York Stock Exchange. With annualized revenues in excess of $2.1 billion and more than 62,000 employees, ABM provides janitorial, parking, engineering, security, lighting, elevator, mechanical and network services for thousands of commercial, industrial, institutional and retail facilities in hundreds of cities across North America. In addition to ABM Lakeside Building Maintenance, the ABM Family of Services includes ABM Janitorial, Ampco System Parking, ABM Engineering, American Commercial Security (ACSS), Amtech Lighting, Amtech Elevator, CommAir Mechanical and ABM Service Network.