Some 1,850 units are in privately owned buildings where social-service agencies lease apartments into which they place clients.

These agencies will lease 780,000 square feet of space from the Ratner companies, leaving 170,000 square feet on the top floors for commercial tenants.

The agency leased it to the company Porty Lotnicze "Mazury-Szczytno" which planned to turn it into a civilian airport.

G.S.A. officials still don't think it's a loss if agencies don't lease from them.

In the meantime, the agency leased 75,000 square feet to a tenant and left the rest empty.

The federal agency leased the space for more than 20 years.

The agency occupied eight floors of the building and leased the other floors.

If a deal is struck, the agency would lease nearly half the building, enabling Mr. Silverstein to build without much risk.

It was used to acquire the Sohmer Factory, but the agency took title and is leasing it to Adirondack until 1992.

While commercial enterprises occupied the street-level retail spaces, finance-related agencies leased the remaining portions of the building.