MT. PROSPECT, ILL. — New York-based Polish and Slavic Federal Credit Union (PSFCU) has entered the Illinois market with a new location at Mt. Prospect Plaza in Mt. Prospect. PSFCU leased 4,326 square feet at the 299,300-square-foot retail center. The credit union plans to open in 2010. Mary Beth Menelli of Oakbrook Terrace, Ill.-based Mid-America Asset Management represented the undisclosed landlord in the transaction. Details of the lease were not released.