1 EXHIBIT 4.8 WEXFORD MANAGEMENT LLC 411 West Putnam Avenue Greenwich CT 06830 (203) 862-7000 Direct Dial: 862-7428 Direct Fax: 862-7471 E-Mail: forubin@wexford.com September 22, 1997 Ross Pirasteh Chairman of the Board KTI, Inc. 7000 Boulevard East Guttenberg, NJ 07093 Dear Ross: I hereby resign effective immediately from my position as a director of KTI, Inc. and as a member of the KTI Compensation Committee and Audit Committee. Very Truly Yours, /s/ Kenneth A. Rubin - -------------------- Kenneth A. Rubin