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ST. LOUIS — Integrated Facility Services (IFS) has begun work on a $10 million HVAC, plumbing and fire protection renovation project at the Robert A. Young Federal Building, a 1 million-square-foot property in downtown St. Louis. The project is part of design-build contractor McCarthy Building Cos.’ $62 million seismic retrofit of the 20-story building’s mechanical systems. The building, which was built in 1933 and is currently owned and managed by the U.S. General Services Administration, houses nearly 3,000 employees across roughly 40 federal agencies.