SAFETY KLEEN CORP/

Q: May 31 2002

Q: May 31 2002

Q: Feb 28 2002

Q: Feb 28 2002

FY: Aug 31 2001

Q: Nov 30 2001

Q: Nov 30 2001

Q: Nov 30 2001

FY: Aug 31 2001

FY: Aug 31 2001

Q: Nov 30 2000

Q: Feb 28 2001

Q: May 31 2001

Q: May 31 2001

FY: Aug 31 2000

Q: Feb 28 2001

Q: Nov 30 2000

FY: Aug 31 2000

Q: May 31 2000

Q: Feb 29 2000

5,7

Other events

5,7

5,7

Other events

5,7

5,7

5,7

2,7

2,7

5

5,7

4

5,7

5,7

5,7

5,7

Other events

5,7

Other events

Certification of termination of registration of a class of securities (Section 12(b))

Registration of Securities on Exchange

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 (amendment)

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Post-effective amendment to a registration statement

Prospectus Supplement for Primary Offering

Post-effective amendment to a registration statement

Prospectus Supplement for Primary Offering

Post-effective amendment to a registration statement

Registration statement under Securities Act of 1933 (amendment)

Definitive Proxy Statement

Definitive Proxy Statement

No description available

Definitive Proxy Statement

Preliminary Proxy Statement

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

No description available

SAFETY KLEEN CORP/

SAFETY KLEEN CORP/

SAFETY KLEEN CORP/

SAFETY KLEEN CORP/

SAFETY KLEEN CORP/

MERRILL LYNCH & CO INC

SAFETY KLEEN CORP/

SAFETY KLEEN CORP/

SOUTHEASTERN ASSET MANAGEMENT INC/TN/

SOUTHEASTERN ASSET MANAGEMENT INC/TN/

HALCYON SLIFKA ALAN B MANAGEMENT CO LLC

MERRILL LYNCH & CO INC

LAIDLAW INC

LAIDLAW INC

CRABBE HUSON GROUP INC

LAIDLAW INC

LAIDLAW ENVIRONMENTAL SERVICES INC

LAIDLAW ENVIRONMENTAL SERVICES INC

LAIDLAW ENVIRONMENTAL SERVICES INC

LAIDLAW ENVIRONMENTAL SERVICES INC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)