EXHIBIT 23(c) CONSENT OF KPMG PEAT MARWICK LLP -------------------------------- We hereby consent to the incorporation by reference in this Registration Statement on Form S-4 of our report dated January 24, 1997, which appears in Keystone Heritage Group, Inc.'s 1996 Annual Report on Form 10-K, and to the reference to our Firm under the caption "Experts" in the prospectus. KPMG PEAT MARWICK LLP By: --------------------------------- Philadelphia, Pennsylvania December 2, 1997