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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

                              EXCHANGE ACT OF 1934


                For the Quarterly Period Ended November 30, 2000


                         Commission File Number 1-8368


                               SAFETY-KLEEN CORP.

             (Exact name of registrant as specified in its charter)


               Delaware                                         51-0228924
---------------------------------                           --------------------
(State or other jurisdiction of                             (I.R.S. Employer
 incorporation or organization)                              Identification No.)

1301 Gervais Street Columbia, Suite 300, South Carolina               29201
-------------------------------------------------------            ----------
(Address of principal executive offices)                           (Zip Code)


       (803) 933-4200 (Registrant's telephone number, including area code)
       --------------

   ---------------------------------------------------------------------------
   (Former name, address and former fiscal year, if changed since last report)


     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Sections 13 or 15(d) of the  Securities  Exchange Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.


         Yes        No    X
             -----      -----

The  number of shares of the issuer's common stock outstanding as of January 11,
2001 was 100,783,596.

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                               SAFETY-KLEEN CORP.


                                      INDEX


PART I FINANCIAL INFORMATION...................................................3

PART II  OTHER INFORMATION

Item 1   Legal Proceeding......................................................3

Item 6   Exhibits and Reports on Form 8-K......................................3

Signatures....................................................................10

Exhibit Index.................................................................11


                                     Page 2

<PAGE>


                         PART I - FINANCIAL INFORMATION

         Safety-Kleen   Corp.  (the  "Company"  or  "Registrant")   has  omitted
information  responsive  to Items 1, 2 and 3 of Part I of Form 10-Q and portions
of other Items which elicit financial information. As described in the Company's
Current  Report  on Form 8-K  filed on August 8,  2000,  the  Company  dismissed
PricewaterhouseCoopers  LLP as its independent accountants on August 1, 2000 and
engaged  Arthur  Andersen  LLP  as  successor  independent   accountants.   Upon
completion  of the audit by Arthur  Andersen  for fiscal  years ended August 31,
1997  through  August 31,  2000,  the  Company  will amend this Form 10-Q,  file
audited  financial  statements,   as  applicable,   and  respond  to  Items  the
information  for which has been  omitted in this filing.  The Company  presently
anticipates making that filing as soon as practicable.

                           PART II - OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS.


         There have been no  additional  significant  legal  proceedings  or any
material  changes in the legal  proceedings  other than as  reported in PART II,
Item 3 of the  Company's  Report on Form 10-K for the twelve months ended August
31, 2000.



ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K.

     (a)   Exhibits:

(3)(a) Restated  Certificate of  Incorporation of the Company dated May 13, 1997
and  Amendment  to  Certificate  of  Incorporation  dated May 15,  1997 filed as
Exhibit 3(a) to the  Registrant's  Form 10-Q for the Quarter  ended May 31, 1997
and incorporated herein by reference.

(3)(a)(i)  Certificate  of  Correction  Filed to Correct a Certain  Error in the
Restated and Amended  Certificate of  Incorporation of the Company dated October
15, 1997 filed as Exhibit  (3)(a)(i) to the  Registrant's  Form 10-K-405 for the
Year ended August 31, 1997, and incorporated herein by reference.

(3)(a)(ii) Certificate of Amendment to the Restated Certificate of Incorporation
of the  Company  dated  November  25, 1998 filed as Exhibit  (3)(a)(iii)  to the
Registrant's  Form 10-Q for the quarter ended November 30, 1998 and incorporated
herein by reference.

(3)(a)(iii)   Certificate   of  Amendment  to  the   Restated   Certificate   of
Incorporation of the Company dated November 30, 1998 filed as Exhibit (3)(a)(iv)
to the  Registrant's  Form 10-Q for the  quarter  ended  November  30,  1998 and
incorporated herein by reference.

(3)(b) Amended and Restated Bylaws of the Company filed as Exhibit (3)(b) to the
Registrant's  Form 10-K for the year  ended  August  31,  2000 and  incorporated
herein by reference.

                                     Page 3
<PAGE>

(4)(a) Indenture dated as of May 29, 1998 between LES, Inc. (a subsidiary of the
Registrant), Registrant, subsidiary guarantors of the Registrant and The Bank of
Nova Scotia Trust  Company of New York,  as trustee filed as Exhibit 4(b) to the
Registrant's  Form S-4 Registration  Statement No. 333-57587 filed June 24, 1998
and incorporated herein by reference.

(4)(b)  First  Supplemental  Indenture  effective  as of November 15, 1998 among
Safety-Kleen Services, Inc. the Registrant, SK Europe, Inc. and The Bank of Nova
Scotia  Trust  Company of New York,  as trustee  filed as Exhibit  (4)(f) to the
Registrant's  Form S-4 Registration  Statement No. 333-82689 filed July 12, 1999
and incorporated herein by reference.

(4)(c)  Second  Supplemental  Indenture  effective  as  of  May  7,  1999  among
Safety-Kleen Services, Inc. the Company, SK Services,  L.C., SK Services (East),
L.C. and The Bank of Nova Scotia Trust  Company of New York, as trustee filed as
Exhibit   (4)(d)  to  the  Company's  Form  10-K  filed  October  29,  1999  and
incorporated herein by reference.

(4)(d)  Indenture  dated as of May 17, 1999  between the Company and the Bank of
Nova Scotia Trust Company of New York, as trustee filed as Exhibit (4)(b) to the
Registrant's  Form S-4 Registration  Statement No. 333-82689 filed July 12, 1999
and incorporated herein by reference.

(4)(e) Amended and Restated  Credit  Agreement among Laidlaw  Chem-Waste,  Inc.,
Laidlaw Environmental Services (Canada) Ltd., Toronto Dominion (Texas) Inc., The
Toronto-Dominion  Bank,  TD  Securities  (USA)  Inc.,  The Bank of Nova  Scotia,
NationsBank,  N.A. and The First National Bank of Chicago and NationsBank,  N.A.
as  Syndication  Agent dated as of April 3, 1998,  filed as Exhibit  4(f) to the
Registrant's Form 10-Q for the quarter ended February 28, 1999, and incorporated
herein by reference.

(4)(f)  Supplement to the Amended and Restated  Credit  Agreement  among Laidlaw
Chem-Waste, Inc., Laidlaw Environmental Services (Canada) Ltd., Toronto Dominion
(Texas) Inc., The  Toronto-Dominion  Bank, TD Securities (USA) Inc., The Bank of
Nova  Scotia,  NationsBank,  N.A.  and The First  National  Bank of Chicago  and
NationsBank,  N.A.  as  Syndication  Agent  dated as of April 3, 1998,  filed as
Exhibit 4(e) to a subsidiary of the Registrant's Form S-4 Registration Statement
No. 333-57587 filed June 24, 1998 and incorporated herein by reference.

(4)(g) Waiver and First Amendment to the Amended and Restated  Credit  Agreement
dated  as of May 15,  1998  among  LES,  Inc.,  Laidlaw  Environmental  Services
(Canada) Ltd., the Lenders, Toronto Dominion (Texas), Inc., The Toronto Dominion
Bank, TD Securities (USA) Inc., The Bank of Nova Scotia, NationsBank,  N.A., The
First  National  Bank of Chicago and  Wachovia  Bank filed as Exhibit  4(f) to a
subsidiary of the  Registrant's  Form S-4  Registration  Statement No. 333-57587
filed June 24, 1998 and incorporated herein by reference.

(4)(h)  Commitment  to Increase  Supplement  to the Amended and Restated  Credit
Agreement  dated as of June 3,  1998  among  LES,  Inc.,  Laidlaw  Environmental
Services (Canada) Ltd., the Lenders, Toronto Dominion (Texas), Inc., The Toronto
Dominion Bank, TD Securities  (USA) Inc., The Bank of Nova Scotia,  NationsBank,
N.A., The First National Bank of Chicago and Wachovia Bank filed as Exhibit 4(g)
to a  subsidiary  of  the  Registrant's  Form  S-4  Registration  Statement  No.
333-57587 filed June 24, 1998 and incorporated herein by reference.

                                     Page 4
<PAGE>

(4)(i) Second Amendment to the Amended and Restated Credit Agreement dated as of
November 20, 1998 among  Safety-Kleen  Services,  Inc.  (formerly  known as LES,
Inc.),   Safety-Kleen   Services  (Canada)  Ltd.   (formerly  known  as  Laidlaw
Environmental  Services  (Canada) Ltd.), the Lenders,  Toronto Dominion (Texas),
Inc.,  The Toronto  Dominion  Bank, TD Securities  (USA) Inc.,  The Bank of Nova
Scotia, NationsBank,  N.A., The First National Bank of Chicago and Wachovia Bank
N.A.,  filed as Exhibit  (4)(j) to the  Registrant's  Form 10-Q for the  quarter
ended February 28, 1999 and incorporated herein by reference.

(4)(j) Waiver and Third Amendment to the Amended and Restated  Credit  Agreement
dated as of May 6, 1999 among  Safety-Kleen  Services,  Inc.  (formerly known as
LES,  Inc.),  Safety-Kleen  Services  (Canada) Ltd.  (formerly  known as Laidlaw
Environmental  Services  (Canada) Ltd.), the Lenders,  Toronto Dominion (Texas),
Inc.,  The Toronto  Dominion  Bank, TD Securities  (USA) Inc.,  The Bank of Nova
Scotia, NationsBank,  N.A., The First National Bank of Chicago and Wachovia Bank
N.A. filed as Exhibit (4)(l) to the Registrant's Form S-4 Registration Statement
No. 333-82689 filed July 12, 1999 and incorporated herein by reference.

(4)(k) Fourth  Amendment  dated as of March 13, 2000 to the Amended and Restated
Credit  Agreement  dated as of May 6, 1999  among  Safety-Kleen  Services,  Inc.
(formerly known as LES, Inc.),  Safety-Kleen  Services  (Canada) Ltd.  (formerly
known as Laidlaw  Environmental  Services  (Canada) Ltd.), the Lenders,  Toronto
Dominion (Texas), Inc., The Toronto Dominion Bank, TD Securities (USA) Inc., The
Bank of Nova Scotia,  NationsBank,  N.A., The First National Bank of Chicago and
Wachovia Bank N.A. filed as Exhibit (4)(l) to the Registrant's Current Report on
Form 10-Q filed July 18, 2000 and incorporated herein by reference.

(4)(l)  Consent  dated as of March 16, 2000 to the Amended and  Restated  Credit
Agreement dated as of May 6, 1999 among  Safety-Kleen  Services,  Inc. (formerly
known as LES,  Inc.),  Safety-Kleen  Services  (Canada) Ltd.  (formerly known as
Laidlaw  Environmental  Services  (Canada) Ltd.), the Lenders,  Toronto Dominion
(Texas),  Inc., The Toronto Dominion Bank, TD Securities (USA) Inc., The Bank of
Nova Scotia, NationsBank,  N.A., The First National Bank of Chicago and Wachovia
Bank N.A.  filed as Exhibit  (4)(m) to the  Registrant's  Current Report on Form
10-Q filed July 18, 2000 and incorporated herein by reference.

(4)(m) Amended and Restated  $100,000,000  Debtor In Possession Credit Agreement
among Safety-Kleen Services, Inc., The Several Lenders from Time to Time Parties
thereto,  Toronto Dominion (Texas),  Inc., as General  Administrative  Agent and
Underwriter  and The CIT  Group/Business  Credit,  Inc. as Collateral  Agent and
Underwriter  Initially dated as of June 11, 2000 Amended and Restated as of July
19,  2000 filed as  Exhibit  (4)(m) to the  Registrant's  Form 10-K for the year
ended August 31, 2000 and incorporated herein by reference.

(4)(n)  First  Amendment,  dated as of October  31,  2000,  to the  Amended  and
Restated  $100,000,000  Debtor In Possession Credit Agreement among Safety-Kleen
Services,  Inc., The Several Lenders from Time to Time Parties thereto,  Toronto
Dominion (Texas),  Inc., as General Administrative Agent and Underwriter and The
CIT Group/Business  Credit,  Inc. as Collateral Agent and Underwriter  Initially
dated as of June 11, 2000 Amended and Restated as of July 19, 2000.

                                     Page 5
<PAGE>

(4)(o)  Registration  Rights  Agreement  dated May 15, 1997 between the Company,
Laidlaw  Transportation,  Inc.  and Laidlaw  Inc. the form of which was filed as
Exhibit B to Annex A to the Registrant's  Definitive Proxy Statement on Form DEF
14A, filed on May 1, 1997 and incorporated herein by reference.

(4)(p)  Indenture  dated as of May 1, 1993  between the  Industrial  Development
Board  of  the   Metropolitan   Government  of  Nashville  and  Davidson  County
(Tennessee)  and  NationsBank of Tennessee,  N.A.,  filed as Exhibit 4(f) to the
Registrant's  Form 10-Q for the Quarter  ended May 31,  1997,  and  incorporated
herein by reference.

(4)(q) Indenture of Trust dated as of August 1, 1995 between Tooele County, Utah
and West One Bank,  Utah, now known as U.S.  Bank, as Trustee,  filed as Exhibit
4(h) to the  Registrant's  form 10-Q for the  Quarter  ended May 31,  1997,  and
incorporated herein by reference.

(4)(r)  Indenture of Trust dated as of July 1, 1997 between Tooele County,  Utah
and U.S. Bank, a national banking association, as Trustee, filed as Exhibit 4(j)
to the  Registrant's  Form  10-Q  for  the  Quarter  ended  May  31,  1997,  and
incorporated herein by reference.

(4)(s) Indenture of Trust dated as of July 1, 1997 between California  Pollution
Control Financing  Authority and U.S. Bank, a national banking  association,  as
Trustee,  filed as Exhibit  4(k) to the  Registrant's  Form 10-Q for the Quarter
ended May 31, 1997, and incorporated herein by reference.

(4)(t)  Promissory Note dated May 15, 1997 for  $60,000,000  from the Company to
Westinghouse  Electric  Corporation,  filed as Exhibit 4(n) to the  Registrant's
Form  10-Q for the  Quarter  ended  May 31,  1997,  and  incorporated  herein by
reference.

(4)(u) Letter dated May 7, 1999 from Toronto-Dominion  (Texas) Inc. (as assignee
of Westinghouse  Electric  Corporation) and agreed to by the Company and Laidlaw
Inc. amending the terms of the Promissory Note dated May 15, 1997 (as referenced
in  Exhibit  (4)(r))  filed  as  Exhibit  (4)(u)  to the  Registrant's  Form S-4
Registration Statement No. 333-82689 filed July 12, 1999 and incorporated herein
by reference.

(4)(v)  Guaranty  Agreement  dated May 15, 1997 by Laidlaw Inc. to  Westinghouse
Electric  Corporation  guaranteeing  Promissory  Note  dated  May 15,  1997  (as
referenced   in  Exhibit   (4)(s))   from  Company  to   Westinghouse   Electric
Corporation),  filed  as  Exhibit  4(o) to the  Registrant's  Form  10-Q for the
Quarter ended May 31, 1997, and incorporated herein by reference.


(4)(w)  Rights  Agreement  dated as of October 15, 1999  between the Company and
EquiServe  Trust  Company,  N.A., as Rights Agent,  filed as Exhibit (c)1 to the
Company's  Current Report on Form 8-K filed on October 15, 1999 and incorporated
herein by reference.


(4)(x) First Amendment to Rights Agreement,  dated as of March 17, 2000, between
the Company and  EquiServe  Trust  Company,  N.A.  filed as Exhibit  99.1 to the
Company's  Current  Report on Form 8-K filed on March 17, 2000 and  incorporated
herein by reference.

                                     Page 6
<PAGE>


(4)(y) Letter Agreement, dated October 12, 1999, between the Company and Laidlaw
Inc. filed as Exhibit 99.2 to the Company's  Current Report on Form 8-K filed on
March 17, 2000 and incorporated herein by reference.

(4)(z) Other instruments defining the rights of holders of nonregistered debt of
the Company  have been omitted from this exhibit list because the amount of debt
authorized  under any such instrument does not exceed 10% of the total assets of
the Company and its  subsidiaries.  The Company  agrees to furnish a copy of any
such instrument to the Commission upon request.

(10)(a)  Agreement  and Plan of Merger  dated as of March 16,  1998 by and among
Registrant, LES Acquisition, Inc., and Safety-Kleen Corp. included as Annex A of
Safety-Kleen's  Revised Amended  Prospectus on Form 14D-9 filed as Exhibit 62 to
Safety-Kleen's  Amendment  No.  28 to  Schedule  14-9A on March  17,  1998,  and
incorporated herein by reference.

(10)(b) Stock  Purchase  Agreement  between  Westinghouse  Electric  Corporation
(Seller) and Rollins Environmental Services, Inc. (Buyer) for National Electric,
Inc. dated March 7, 1995 filed as Exhibit 2 to the  Registrant's  Current Report
on Form 8-K filed on June 13, 1995 and incorporated herein by reference.

(10)(c) Second  Amendment to Stock Purchase  Agreement (as referenced in Exhibit
(10)(b)  above),  dated May 15, 1997 among  Westinghouse  Electric  Corporation,
Rollins Environmental  Services, Inc. and Laidlaw Inc., filed as Exhibit 4(m) to
the Registrant's  Form 10-Q for the Quarter ended May 31, 1997, and incorporated
herein by reference.


(10)(d)  Agreement for the sale and purchase of shares and loan stock hold by SK
Europe, Inc. in Safety-Kleen Europe Limited between  Safety-Kleen Europe Limited
and SK Europe,  Inc.  and the Company and The  Electra  Subscribers  and Electra
European  Fund LP  dated as of July 6,  2000  filed as  Exhibit  (10)(d)  to the
Registrant's  Form 10-K for the year  ended  August  31,  2000 and  incorporated
herein by reference.

(10)(e) Rollins  Environmental  Services,  Inc. 1982 Incentive Stock Option Plan
filed with Amendment No. 1 to the Company's  Registration  Statement No. 2-84139
on Form S-1 dated June 24, 1983 and incorporated herein by reference.

(10)(f)  Rollins  Environmental  Services,  Inc. 1993 Stock Option Plan filed as
Exhibit (10)(e) to the  Registrant's  Current Report on Form 10-Q filed July 18,
2000 and incorporated herein by reference.

(10)(g)  Company's 1997 Stock Option Plan, filed as Exhibit 4.4 to the Company's
Registration  Statement  No.  333-41859 on Form S-8 dated  December 10, 1997 and
incorporated herein by reference.

(10)(h) First  Amendment to Company's  1997 Stock Option Plan,  filed as Exhibit
(10)(g) to the  Company's  Form 10-Q dated  January  14,  2000 and  incorporated
herein by reference.

                                     Page 7
<PAGE>

(10)(i)  Company's  Director's  Stock Option  Plan,  filed as Exhibit 4.5 to the
Company's  Registration  Statement No.  333-41859 on Form S-8 dated December 10,
1997 and incorporated herein by reference.

(10)(j)  First  Amendment  to  Company's  Director's  Stock Option Plan filed as
Exhibit  (10)(i)  to  the  Company's  Form  10-Q  dated  January  14,  2000  and
incorporated herein by reference.

(10)(k)  Stock  Purchase  Agreement  dated  February 6, 1997 among the  Company,
Laidlaw Inc., and Laidlaw Transportation,  Inc. filed as Exhibit A to Annex A to
the  Definitive  Proxy  Statement  on Form  DEF 14A  filed  on May 1,  1997  and
incorporated herein by reference.

(10)(l)  Executive  Bonus Plan for fiscal  year 2000 filed as  Appendix C to the
Definitive  Proxy  Statement  on Form DEF 14A  filed  on  October  29,  1999 and
incorporated herein by reference.

 (10)(m) Company's U.S. Supplemental  Executive Retirement Plan filed as Exhibit
10(g) to the  Company's  10-Q for the  quarter  ended  November  30,  1997,  and
incorporated herein by reference.

(10)(n) Employment Agreement by and between Company and Grover C. Wrenn dated as
of August 23, 2000 filed as Exhibit  (10)(n) to the  Registrant's  Form 10-K for
the year ended August 31, 2000 and incorporated herein by reference.

(10)(o)  Employment  Agreement by and between  Company and David E. Thomas,  Jr.
dated as of August 23, 2000 filed as Exhibit  (10)(o) to the  Registrant's  Form
10-K for the year ended August 31, 2000 and incorporated herein by reference.

(10)(p) Employment Agreement by and between Company and Larry W. Singleton dated
as of July 17, 2000 filed as Exhibit (10)(p) to the  Registrant's  Form 10-K for
the year ended August 31, 2000 and incorporated herein by reference.

(10)(q) Form of Senior  Executive  Change of Control  Agreement filed as Exhibit
(10)(q) to the  Registrant's  Form 10-K for the year ended  August 31,  2000 and
incorporated herein by reference.

(10)(r)  Senior  Executive  Retention  Plan  filed  as  Exhibit  (10)(r)  to the
Registrant's  Form 10-K for the year  ended  August  31,  2000 and  incorporated
herein by reference.

(10)(s)  Senior  Executive  Severance  Plan  filed  as  Exhibit  (10)(s)  to the
Registrant's  Form 10-K for the year  ended  August  31,  2000 and  incorporated
herein by reference.

(10)(t)  Executive  Retention Plan filed as Exhibit (10)(t) to the  Registrant's
Form  10-K  for the year  ended  August  31,  2000 and  incorporated  herein  by
reference.

(10)(u)  Executive  Severance Plan filed as Exhibit (10)(u) to the  Registrant's
Form  10-K  for the year  ended  August  31,  2000 and  incorporated  herein  by
reference.

(10)(v) Key Manager  Retention Plan filed as Exhibit (10)(v) to the Registrant's
Form  10-K  for the year  ended  August  31,  2000 and  incorporated  herein  by
reference.

                                     Page 8
<PAGE>

(10)(w)Key  Manager  Severance Plan filed as Exhibit (10)(w) to the Registrant's
Form  10-K  for the year  ended  August  31,  2000 and  incorporated  herein  by
reference.

(10)(x) Letter  Agreement dated March 16, 2000 between Jay Alix & Associates and
the Company  filed as Exhibit  (10)(x) to the Company's  Current  Report on Form
10-Q filed July 18, 2000 and incorporated herein by reference.

(99.1)  Consent  Agreement  and Final  Order by and  between  the United  States
Environmental Protection Agency and Safety-Kleen Corp. and certain of its United
States  subsidiaries  and affiliates filed as Exhibit (99.1) to the Registrant's
Form  10-K  for the year  ended  August  31,  2000 and  incorporated  herein  by
reference.

(b)      Reports on Form 8-K.

i.   The Company filed a Current  Report on Form 8-K on September 15, 2000 which
     contained Item 5 related to an updated report concerning the Pinewood legal
     proceeding.

ii.  The  Company  filed a Current  Report on Form 8-K on October 11, 2000 which
     contained Item 5 related to an updated report concerning the Pinewood legal
     proceeding.

iii. The Company  filed a Current  Report on Form 8-K on November 14, 2000 which
     contained Item 5 related to a press release announcing that Safety-Kleen to
     launch SystemOne Product line for 2001.

                                     Page 9
<PAGE>




                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Company  has duly  caused  this  report to be  signed on its  behalf by the
undersigned thereunto duly authorized.


   DATE: January 12, 2001      SAFETY-KLEEN CORP.
                               ---------------------
                                   (Registrant)


                               /s/ Henry H. Taylor
                               ----------------------------
                               Henry H. Taylor
                               Vice President, General Counsel and Secretary


                               /s/ Larry W. Singleton
                               -----------------------------
                               Larry W. Singleton
                               Chief Financial Officer

                                    Page 10
<PAGE>


                                 EXHIBIT INDEX

(3)(a)         Restated  Certificate of  Incorporation  of the Company dated May
               13, 1997 and Amendment to Certificate of Incorporation  dated May
               15, 1997 filed as Exhibit 3(a) to the Registrant's  Form 10-Q for
               the  Quarter  ended  May 31,  1997  and  incorporated  herein  by
               reference.

(3)(a)(i)      Certificate of Correction Filed to Correct a Certain Error in the
               Restated and Amended  Certificate of Incorporation of the Company
               dated  October  15,  1997  filed  as  Exhibit  (3)(a)(i)  to  the
               Registrant's  Form  10-K-405  for the Year ended August 31, 1997,
               and incorporated herein by reference.

(3)(a)(ii)     Certificate   of  Amendment  to  the  Restated   Certificate   of
               Incorporation  of the Company  dated  November  25, 1998 filed as
               Exhibit (3)(a)(iii) to the Registrant's Form 10-Q for the quarter
               ended November 30, 1998 and incorporated herein by reference.

(3)(a)(iii)    Certificate   of  Amendment  to  the  Restated   Certificate   of
               Incorporation  of the Company  dated  November  30, 1998 filed as
               Exhibit  (3)(a)(iv) to the Registrant's Form 10-Q for the quarter
               ended November 30, 1998 and incorporated herein by reference.

(3)(b)         Amended  and  Restated  Bylaws of the  Company  filed as  Exhibit
               (3)(b) to the  Registrant's  Form 10-K for the year ended  August
               31, 2000 and incorporated herein by reference.

(4)(a)         Indenture  dated  as  of  May  29,  1998  between  LES,  Inc.  (a
               subsidiary of the Registrant),  Registrant, subsidiary guarantors
               of the  Registrant  and The Bank of Nova Scotia Trust  Company of
               New York,  as trustee  filed as Exhibit 4(b) to the  Registrant's
               Form S-4 Registration Statement No. 333-57587 filed June 24, 1998
               and incorporated herein by reference.

(4)(b)         First  Supplemental  Indenture  effective as of November 15, 1998
               among Safety-Kleen Services, Inc. the Registrant, SK Europe, Inc.
               and The Bank of Nova Scotia Trust Company of New York, as trustee
               filed as Exhibit (4)(f) to the Registrant's Form S-4 Registration
               Statement  No.  333-82689  filed July 12,  1999 and  incorporated
               herein by reference.

(4)(c)         Second  Supplemental  Indenture effective as of May 7, 1999 among
               Safety-Kleen  Services,  Inc. the Company, SK Services,  L.C., SK
               Services  (East),  L.C. and The Bank of Nova Scotia Trust Company
               of New York, as trustee filed as Exhibit  (4)(d) to the Company's
               Form 10-K  filed  October  29,  1999 and  incorporated  herein by
               reference.

(4)(d)         Indenture  dated as of May 17,  1999  between the Company and the
               Bank of Nova Scotia Trust  Company of New York,  as trustee filed
               as  Exhibit  (4)(b)  to the  Registrant's  Form S-4  Registration
               Statement  No.  333-82689  filed July 12,  1999 and  incorporated
               herein by reference.

                                    Page 11
<PAGE>

(4)(e)         Amended and Restated Credit  Agreement among Laidlaw  Chem-Waste,
               Inc.,  Laidlaw  Environmental  Services  (Canada)  Ltd.,  Toronto
               Dominion (Texas) Inc., The  Toronto-Dominion  Bank, TD Securities
               (USA) Inc.,  The Bank of Nova Scotia,  NationsBank,  N.A. and The
               First  National  Bank  of  Chicago  and   NationsBank,   N.A.  as
               Syndication  Agent  dated as of April 3,  1998,  filed as Exhibit
               4(f) to the Registrant's Form 10-Q for the quarter ended February
               28, 1999, and incorporated herein by reference.

(4)(f)         Supplement  to the Amended and Restated  Credit  Agreement  among
               Laidlaw Chem-Waste, Inc., Laidlaw Environmental Services (Canada)
               Ltd., Toronto Dominion (Texas) Inc., The  Toronto-Dominion  Bank,
               TD Securities  (USA) Inc., The Bank of Nova Scotia,  NationsBank,
               N.A. and The First National Bank of Chicago and NationsBank, N.A.
               as Syndication  Agent dated as of April 3, 1998, filed as Exhibit
               4(e) to a subsidiary of the  Registrant's  Form S-4  Registration
               Statement  No.  333-57587  filed June 24,  1998 and  incorporated
               herein by reference.

(4)(g)         Waiver and First  Amendment  to the Amended and  Restated  Credit
               Agreement  dated as of May 15,  1998  among  LES,  Inc.,  Laidlaw
               Environmental  Services  (Canada)  Ltd.,  the  Lenders,   Toronto
               Dominion (Texas),  Inc., The Toronto Dominion Bank, TD Securities
               (USA) Inc., The Bank of Nova Scotia, NationsBank, N.A., The First
               National  Bank of Chicago and Wachovia Bank filed as Exhibit 4(f)
               to  a  subsidiary  of  the  Registrant's  Form  S-4  Registration
               Statement  No.  333-57587  filed June 24,  1998 and  incorporated
               herein by reference.

(4)(h)         Commitment  to Increase  Supplement  to the Amended and  Restated
               Credit  Agreement  dated  as of June 3,  1998  among  LES,  Inc.,
               Laidlaw  Environmental   Services  (Canada)  Ltd.,  the  Lenders,
               Toronto  Dominion  (Texas),  Inc., The Toronto  Dominion Bank, TD
               Securities  (USA)  Inc.,  The Bank of Nova  Scotia,  NationsBank,
               N.A.,  The First National Bank of Chicago and Wachovia Bank filed
               as Exhibit  4(g) to a  subsidiary  of the  Registrant's  Form S-4
               Registration  Statement  No.  333-57587  filed June 24,  1998 and
               incorporated herein by reference.

(4)(i)         Second  Amendment  to the Amended and Restated  Credit  Agreement
               dated as of November 20, 1998 among Safety-Kleen  Services,  Inc.
               (formerly known as LES,  Inc.),  Safety-Kleen  Services  (Canada)
               Ltd. (formerly known as Laidlaw  Environmental  Services (Canada)
               Ltd.), the Lenders,  Toronto Dominion (Texas),  Inc., The Toronto
               Dominion Bank, TD Securities (USA) Inc., The Bank of Nova Scotia,
               NationsBank,  N.A.,  The  First  National  Bank  of  Chicago  and
               Wachovia Bank N.A.,  filed as Exhibit (4)(j) to the  Registrant's
               Form  10-Q  for  the  quarter   ended   February   28,  1999  and
               incorporated herein by reference.

                                    Page 12
<PAGE>

(4)(j)         Waiver and Third  Amendment  to the Amended and  Restated  Credit
               Agreement  dated as of May 6, 1999 among  Safety-Kleen  Services,
               Inc.  (formerly  known  as  LES,  Inc.),   Safety-Kleen  Services
               (Canada) Ltd. (formerly known as Laidlaw  Environmental  Services
               (Canada) Ltd.), the Lenders,  Toronto Dominion (Texas), Inc., The
               Toronto Dominion Bank, TD Securities (USA) Inc., The Bank of Nova
               Scotia, NationsBank, N.A., The First National Bank of Chicago and
               Wachovia Bank N.A.  filed as Exhibit  (4)(l) to the  Registrant's
               Form S-4 Registration Statement No. 333-82689 filed July 12, 1999
               and incorporated herein by reference.

(4)(k)         Fourth  Amendment  dated as of March 13,  2000 to the Amended and
               Restated  Credit   Agreement  dated  as  of  May  6,  1999  among
               Safety-Kleen  Services,  Inc.  (formerly  known  as  LES,  Inc.),
               Safety-Kleen  Services  (Canada) Ltd.  (formerly known as Laidlaw
               Environmental  Services  (Canada)  Ltd.),  the  Lenders,  Toronto
               Dominion (Texas),  Inc., The Toronto Dominion Bank, TD Securities
               (USA) Inc., The Bank of Nova Scotia, NationsBank, N.A., The First
               National Bank of Chicago and Wachovia Bank N.A.  filed as Exhibit
               (4)(l) to the Registrant's Current Report on Form 10-Q filed July
               18, 2000 and incorporated herein by reference.

(4)(l)         Consent  dated as of March 16, 2000 to the  Amended and  Restated
               Credit  Agreement  dated  as of May 6,  1999  among  Safety-Kleen
               Services,  Inc.  (formerly  known  as  LES,  Inc.),  Safety-Kleen
               Services (Canada) Ltd.  (formerly known as Laidlaw  Environmental
               Services  (Canada) Ltd.), the Lenders,  Toronto Dominion (Texas),
               Inc., The Toronto  Dominion  Bank, TD Securities  (USA) Inc., The
               Bank of Nova Scotia,  NationsBank,  N.A., The First National Bank
               of Chicago and Wachovia Bank N.A.  filed as Exhibit (4)(m) to the
               Registrant's  Current Report on Form 10-Q filed July 18, 2000 and
               incorporated herein by reference.

(4)(m)         Amended and Restated  $100,000,000  Debtor In  Possession  Credit
               Agreement among Safety-Kleen Services,  Inc., The Several Lenders
               from Time to Time  Parties  thereto,  Toronto  Dominion  (Texas),
               Inc., as General Administrative Agent and Underwriter and The CIT
               Group/Business  Credit,  Inc. as Collateral Agent and Underwriter
               Initially  dated as of June 11, 2000  Amended and  Restated as of
               July 19, 2000 filed as Exhibit  (4)(m) to the  Registrant's  Form
               10-K for the year ended August 31, 2000 and  incorporated  herein
               by reference.

(4)(n)         First Amendment, dated as of October 31, 2000, to the Amended and
               Restated $100,000,000 Debtor In Possession Credit Agreement among
               Safety-Kleen  Services,  Inc.,  The Several  Lenders from Time to
               Time Parties thereto,  Toronto Dominion (Texas), Inc., as General
               Administrative  Agent and Underwriter and The CIT  Group/Business
               Credit, Inc. as Collateral Agent and Underwriter  Initially dated
               as of June 11, 2000 Amended and Restated as of July 19, 2000.

                                    Page 13
<PAGE>

(4)(o)         Registration  Rights  Agreement  dated May 15,  1997  between the
               Company,  Laidlaw Transportation,  Inc. and Laidlaw Inc. the form
               of which  was filed as  Exhibit B to Annex A to the  Registrant's
               Definitive  Proxy Statement on Form DEF 14A, filed on May 1, 1997
               and incorporated herein by reference.

(4)(p)         Indenture  dated  as  of  May  1,  1993  between  the  Industrial
               Development Board of the Metropolitan Government of Nashville and
               Davidson County  (Tennessee) and NationsBank of Tennessee,  N.A.,
               filed  as  Exhibit  4(f) to the  Registrant's  Form  10-Q for the
               Quarter ended May 31, 1997, and incorporated herein by reference.

(4)(q)         Indenture  of Trust  dated as of August 1,  1995  between  Tooele
               County,  Utah and West One Bank, Utah, now known as U.S. Bank, as
               Trustee,  filed as Exhibit 4(h) to the Registrant's form 10-Q for
               the  Quarter  ended  May 31,  1997,  and  incorporated  herein by
               reference.

(4)(r)         Indenture  of  Trust  dated  as of July 1,  1997  between  Tooele
               County,  Utah and U.S. Bank, a national banking  association,  as
               Trustee,  filed as Exhibit 4(j) to the Registrant's Form 10-Q for
               the  Quarter  ended  May 31,  1997,  and  incorporated  herein by
               reference.

(4)(s)         Indenture  of Trust dated as of July 1, 1997  between  California
               Pollution Control  Financing  Authority and U.S. Bank, a national
               banking  association,  as Trustee,  filed as Exhibit  4(k) to the
               Registrant's  Form 10-Q for the Quarter  ended May 31, 1997,  and
               incorporated herein by reference.

(4)(t)         Promissory  Note  dated  May 15,  1997 for  $60,000,000  from the
               Company to Westinghouse  Electric  Corporation,  filed as Exhibit
               4(n) to the Registrant's  Form 10-Q for the Quarter ended May 31,
               1997, and incorporated herein by reference.

(4)(u)         Letter dated May 7, 1999 from  Toronto-Dominion  (Texas) Inc. (as
               assignee of Westinghouse  Electric  Corporation) and agreed to by
               the Company and Laidlaw Inc. amending the terms of the Promissory
               Note dated May 15, 1997 (as  referenced in Exhibit  (4)(r)) filed
               as  Exhibit  (4)(u)  to the  Registrant's  Form S-4  Registration
               Statement  No.  333-82689  filed July 12,  1999 and  incorporated
               herein by reference.

(4)(v)         Guaranty  Agreement  dated  May  15,  1997  by  Laidlaw  Inc.  to
               Westinghouse  Electric Corporation  guaranteeing  Promissory Note
               dated May 15, 1997 (as referenced in Exhibit (4)(s)) from Company
               to Westinghouse Electric  Corporation),  filed as Exhibit 4(o) to
               the  Registrant's  Form 10-Q for the Quarter  ended May 31, 1997,
               and incorporated herein by reference.

(4)(w)         Rights Agreement dated as of October 15, 1999 between the Company
               and EquiServe  Trust  Company,  N.A.,  as Rights Agent,  filed as
               Exhibit (c)1 to the Company's Current Report on Form 8-K filed on
               October 15, 1999 and incorporated herein by reference.

                                    Page 14
<PAGE>

(4)(x)         First Amendment to Rights Agreement,  dated as of March 17, 2000,
               between the Company and EquiServe  Trust  Company,  N.A. filed as
               Exhibit 99.1 to the Company's Current Report on Form 8-K filed on
               March 17, 2000 and incorporated herein by reference.

(4)(y)         Letter Agreement, dated October 12, 1999, between the Company and
               Laidlaw  Inc.  filed as  Exhibit  99.2 to the  Company's  Current
               Report  on Form  8-K  filed on March  17,  2000 and  incorporated
               herein by reference.

(4)(z)         Other instruments defining the rights of holders of nonregistered
               debt of the Company  have been  omitted  from this  exhibit  list
               because the amount of debt  authorized  under any such instrument
               does not exceed 10% of the total  assets of the  Company  and its
               subsidiaries.  The  Company  agrees to furnish a copy of any such
               instrument to the Commission upon request.

(10)(a)        Agreement  and Plan of Merger  dated as of March 16,  1998 by and
               among Registrant,  LES Acquisition,  Inc., and Safety-Kleen Corp.
               included as Annex A of Safety-Kleen's  Revised Amended Prospectus
               on Form 14D-9 filed as Exhibit 62 to Safety-Kleen's Amendment No.
               28 to Schedule 14-9A on March 17, 1998, and  incorporated  herein
               by reference.

(10)(b)        Stock   Purchase   Agreement   between   Westinghouse    Electric
               Corporation  (Seller) and Rollins  Environmental  Services,  Inc.
               (Buyer) for National Electric,  Inc. dated March 7, 1995 filed as
               Exhibit 2 to the Registrant's Current Report on Form 8-K filed on
               June 13, 1995 and incorporated herein by reference.

(10)(c)        Second  Amendment to Stock  Purchase  Agreement (as referenced in
               Exhibit  (10)(b)  above),  dated May 15, 1997 among  Westinghouse
               Electric Corporation,  Rollins Environmental  Services,  Inc. and
               Laidlaw Inc., filed as Exhibit 4(m) to the Registrant's Form 10-Q
               for the Quarter ended May 31, 1997,  and  incorporated  herein by
               reference.

(10)(d)        Agreement for the sale and purchase of shares and loan stock hold
               by  SK  Europe,  Inc.  in  Safety-Kleen  Europe  Limited  between
               Safety-Kleen  Europe Limited and SK Europe,  Inc. and the Company
               and The Electra Subscribers and Electra European Fund LP dated as
               of July 6, 2000 filed as Exhibit (10)(d) to the Registrant's Form
               10-K for the year ended August 31, 2000 and  incorporated  herein
               by reference.

(10)(e)        Rollins Environmental  Services, Inc. 1982 Incentive Stock Option
               Plan filed with  Amendment  No. 1 to the  Company's  Registration
               Statement  No.  2-84139  on Form  S-1  dated  June  24,  1983 and
               incorporated herein by reference.

(10)(f)        Rollins Environmental Services, Inc. 1993 Stock Option Plan filed
               as Exhibit  (10)(e) to the  Registrant's  Current  Report on Form
               10-Q filed July 18, 2000 and incorporated herein by reference.

                                    Page 15
<PAGE>

(10)(g)        Company's  1997 Stock  Option  Plan,  filed as Exhibit 4.4 to the
               Company's  Registration Statement No. 333-41859 on Form S-8 dated
               December 10, 1997 and incorporated herein by reference.

(10)(h)        First  Amendment  to Company's  1997 Stock Option Plan,  filed as
               Exhibit (10)(g) to the Company's Form 10-Q dated January 14, 2000
               and incorporated herein by reference.

(10)(i)        Company's  Director's  Stock Option Plan, filed as Exhibit 4.5 to
               the Company's  Registration  Statement No.  333-41859 on Form S-8
               dated December 10, 1997 and incorporated herein by reference.

(10)(j)        First Amendment to Company's  Director's  Stock Option Plan filed
               as Exhibit  (10)(i) to the Company's  Form 10-Q dated January 14,
               2000 and incorporated herein by reference.

(10)(k)        Stock  Purchase  Agreement  dated  February  6,  1997  among  the
               Company, Laidlaw Inc., and Laidlaw Transportation,  Inc. filed as
               Exhibit A to Annex A to the  Definitive  Proxy  Statement on Form
               DEF  14A  filed  on  May  1,  1997  and  incorporated  herein  by
               reference.

(10)(l)        Executive  Bonus Plan for fiscal year 2000 filed as Appendix C to
               the Definitive  Proxy  Statement on Form DEF 14A filed on October
               29, 1999 and incorporated herein by reference.

(10)(m)        Company's U.S.  Supplemental  Executive  Retirement Plan filed as
               Exhibit  10(g)  to the  Company's  10-Q  for  the  quarter  ended
               November 30, 1997, and incorporated herein by reference.

(10)(n)        Employment  Agreement by and between  Company and Grover C. Wrenn
               dated as of August  23,  2000  filed as  Exhibit  (10)(n)  to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(o)        Employment  Agreement by and between Company and David E. Thomas,
               Jr.  dated as of August 23, 2000 filed as Exhibit  (10)(o) to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(p)        Employment   Agreement  by  and  between  Company  and  Larry  W.
               Singleton  dated as of July 17, 2000 filed as Exhibit  (10)(p) to
               the Registrant's Form 10-K for the year ended August 31, 2000 and
               incorporated herein by reference.

(10)(q)        Form of Senior  Executive  Change of Control  Agreement  filed as
               Exhibit (10)(q) to the Registrant's  Form 10-K for the year ended
               August 31, 2000 and incorporated herein by reference.

(10)(r)        Senior  Executive  Retention Plan filed as Exhibit (10)(r) to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(s)        Senior  Executive  Severance Plan filed as Exhibit (10)(s) to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

                                    Page 16
<PAGE>

(10)(t)        Executive   Retention  Plan  filed  as  Exhibit  (10)(t)  to  the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(u)        Executive   Severance  Plan  filed  as  Exhibit  (10)(u)  to  the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(v)        Key  Manager  Retention  Plan  filed as  Exhibit  (10)(v)  to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(w)        Key  Manager  Severance  Plan  filed as  Exhibit  (10)(w)  to the
               Registrant's  Form 10-K for the year ended  August  31,  2000 and
               incorporated herein by reference.

(10)(x)        Letter  Agreement  dated  March  16,  2000  between  Jay  Alix  &
               Associates  and the  Company  filed  as  Exhibit  (10)(x)  to the
               Company's  Current  Report on Form 10-Q filed  July 18,  2000 and
               incorporated herein by reference.

(99.1)         Consent  Agreement  and Final  Order by and  between  the  United
               States Environmental Protection Agency and Safety-Kleen Corp. and
               certain of its United States subsidiaries and affiliates filed as
               Exhibit (99.1) to the  Registrant's  Form 10-K for the year ended
               August 31, 2000 and incorporated herein by reference.


                                     Page 17