Exhibit 10.3.1 SAFETY-KLEEN CORP. SEVERANCE AGREEMENT PARTICIPANTS Donald W. Brinckman Chairman John G. Johnson, Jr. President and Chief Executive Officer Hyman K. Bielsky Senior Vice President/General Counsel James L. Breece Vice President Technical Roy D. Bullinger Senior Vice President Business Management and Marketing Robert J. Burian Senior Vice President Human Resources Michael H. Carney Senior Vice President Marketing Services Glenn R. Casbourne Vice President Engineering and Oil Recycle Operations Joseph Chalhoub Senior Vice President Operations, Oil Recovery & Envirosystems David A. Dattilo Senior Vice President Sales and Service Lawrence G. Davenport Vice President Information Services and Chief Information Officer Scott E. Fore Senior Vice President Environment, Health & Safety F. Henry Habicht, II Senior Vice President Corporate Development William P. Kasko Senior Vice President Ulisse Marini Vice President Solvent Recycle Operations Clyde R. Phillips Vice President Sales Eastern Division Clark J. Rose Vice President Manufacturing and Technical Services Laurence M. Rudnick Treasurer Clifford J. Schulz Controller Robert W. Willmschen, Jr. Senior Vice President, Finance