LAKE GROVE, CARLE PLACE AND VALLEY STREAM, N.Y. — NAI Long Island has brokered deals for three new corporate locations for AT&T Mobility in Lake Grove, Carle Place and Valley Stream for a total transaction value of $15.5 million. Al Centrella of NAI Long Island brokered the three transactions on behalf of AT&T Mobility. The company acquired a 4,164-square-foot retail space located at 2093 Smith Haven Plaza in Lake Grove. Matthew O’Grady of C&B Realty represented the undisclosed seller. In Carle Place, AT&T leased a 5,000-square-foot retail space at 235 Old Country Road from Jim Dalta of Park East LLC. In the third transaction, AT&T leased 4,500 square feet of retail space within Plaza at Green Acres in Valley Stream from Jeremy Isaacs of Ripco Realty in conjunction with Macerich.