EXHIBIT 60 CONFIDENTIALITY AND NONDISCLOSURE AGREEMENT DATED MARCH 13, 1998 PRIVILEGED & CONFIDENTIAL ------------------------- Laidlaw Environmental Services, Inc. 1301 Gervais Street Columbia, SC 29201 Safety-Kleen Corp. 1000 North Randall Rd....Confidentiality and Nondisclosure Agreement • March 17th, 1998 • Safety Kleen Corp • Services-business services, nec • Illinois
