Exhibit 99.1 Deloitte & Touche LLP Suite 250 Key Bank Tower 50 Fountain Plaza Buffalo, New York 14202 Tel. (716) 843-7200 Fax. (716) 856-7760 www.us.deloitte.com June 14, 2002 Mr. Edward E. Babcock, Jr. Vice President, Finance Adelphia Business Solutions, Inc. One North Main Street Coudersport, PA 16915-1114 Dear Mr. Babcock: This is to confirm that the client-auditor relationship between Adelphia Business Solutions, Inc. (Commission File No 000-21605) and Deloitte & Touche LLP has ceased. Yours truly, /s/ Deloitte & Touche LLP cc: Office of the Chief Accountant SECPS Letter File Securities and Exchange Commission Mail Stop 11-3 450 5th Street, N.W. Washington, D.C. 20549 Mr. Patrick Lynch, Chairman of the Audit Committee