Safety Kleen Watch

from 10-Q ~50 pages Software End User License Agreement/Sap

from 10-Q >50 pages Master Services Agreement/Eds

from 10-Q 1 page Amend 1 to 2nd A&R M&D Agreement

from 10-Q 1 page Amended Employment Agreement

from 10-Q >50 pages Annex a to Stock Purchase Agreement

from 10-Q ~5 pages Second Amendment to Stock Purchase Agreement

from 10-Q >50 pages Stock Purchase Agreement-Westinghouse/Rollins

from 10-Q 1 page Fiscal Year 2002 Management Incentive Plan

from 10-K/A 1 page 1st Amend to Acquisition Agreement

from 8-K ~50 pages Aquisition Agreement

from 10-Q 1 page Exhibit (10)(jj) Aa Extension Letter Dated December 5, 2001 Arthur Andersen Arthur Andersen Llp Mr. Larry Singleton Chief Financial Officer Suite 700 Safety-Kleen Corp. 1901 Main Street 1301 Gervais Street, Suite 300 Columbia, Sc 29201 Columbia, South Carolina 29201 Tel 803 2543 8102 WWW.ANDERSEN.com December 5, 2001 Re: Rider to Arrangement Letter Dated March 23, 2001 Dear Mr. Singleton: By This Letter, the Job Arrangement Letter Between Arthur Andersen Llp and Safety-Kleen Corp. Dated March 23, 2001, (The Agreement) Is Hereby Amended Such That the Date Through Which the Services Provided Under the Arrangement Letter Is Extended From December 31, 2001, Until Such Time as the Company Determines That the Quarterly and Annual Financial Statements of Safety-Kleen Corp. or Its Subsidiaries for Fiscal 2001 and Prior Periods Have Been Completed. All Other Terms and Conditions of the Agreement Shall Remain in Full Force and Effect. Very Truly Yours, Arthur Andersen Llp /S/ Bryan L. Williams by Bryan L. Williams Ckc/Cvj /J:audit/Saf052/2001/Jals/12-5_amended 3-2 JAL.DOC Acknowledge and Agreed By: Safety-Kleen Corp. By: /S/ Larry W. Singleton Date: 12-18-2001 Title: CFO

from 10-Q 1 page Aa Extension Letter Dated December 5, 2001

from 10-Q ~10 pages Rider to Aa Letter Agreement

from 10-Q ~5 pages Aa Letter Agreement

from 10-Q ~10 pages Material contract

from 10-Q ~10 pages JA&A Letter Agreement

from 10-K 1 page Agreement Among Safety-Kleen Corp, Safety-Kleen Se

from 10-K ~10 pages Employment Agreement by and Between Safety-Kleen

from 10-Q/A ~5 pages Material contract

from 10-Q/A ~20 pages Material contract