================================================================================


                                  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 May 31, 2001


                          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 July 12,
2001 was 100,783,596.

================================================================================


                                     <PAGE>



                               SAFETY-KLEEN CORP.


                                      INDEX


PART I FINANCIAL INFORMATION.................................................  2

PART II  OTHER INFORMATION

Item 1   Legal Proceedings...................................................  2

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

Signatures................................................................... 11


<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 Annual
Report on Form  10-K/A,  filed July 9, 2001,  the  Company is  currently  in the
process of updating its fiscal 2001  general  ledger  system for the  voluminous
number of adjusting  journal  entries  resulting  from its  internal  accounting
review through August 31, 2000. In addition to updating its general ledgers, the
Company is  reviewing  its  accounting  records for the first three  quarters of
fiscal 2001,  including  the effects of applying  any changes to its  accounting
policies from the fiscal 1997 to 2000 review to its current results. Until these
efforts are completed, presently estimated to be on or about September 15, 2001,
the Company  will not be able to file  quarterly  financial  information,  which
responds to the omitted Items.

                           PART II - OTHER INFORMATION

ITEM 1 LEGAL PROCEEDINGS.

     Except as herein set forth, 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/A filed July 9,
2001.

MATTERS RELATED TO INVESTIGATION OF FINANCIAL RESULTS

     On March 5, 2001, a class action captioned Eaton Vance Distributors,  Inc.,
T. Rowe Price  Associates,  Inc.,  Delaware  Investment  Advisors,  John Hancock
Funds, Inc., and Putnam  Investments,  Inc., v. Kenneth W. Winger,  Laidlaw Inc.
John R. Grainger,  James R. Bullock, Paul R. Humphreys,  John Rollins, Sr., John
W. Rollins, Jr., Leslie W. Haworth, David E. Thomas, Jr., Henry B. Tippie, James
L. Wareham, Grover C. Wrenn, Michael J. Bragagnolo and Henry H. Taylor, Case No.
01AS01376, was filed in the Superior Court of the State of California, County of
Sacramento.  The  plaintiffs  purchased or acquired  certain bonds issued by the
California  Pollution Control Financing Authority on July 1, 1997, secured by an
indenture agreement with Laidlaw Environmental  Services, Inc. and its successor
Safety-Kleen  Corp.,  in their  initial  offering on July 1, 1997,  and retained
through  March 6, 2000.  The bonds were  entitled  Pollution  Control  Refunding
Revenue Bonds due July 1, 2007. The plaintiffs allege,  among other things, that
the defendants  made written or oral  communications  containing  material false
statements  or  omissions  and  violated  certain  state  securities  laws.  The
plaintiffs seek to recover compensatory damages in the amount of $21,742,375 and
punitive  damages  in the  amount of  $65,227,125,  as well as  related  relief.
Although  the Company is not a party to this action,  certain of the  individual
defendants,  who are present or former officers or directors of the Company, may
make demands to be indemnified by the Company in connection with the action.


                                       2
<PAGE>


FINANCIAL ASSURANCE ISSUES

     On July 11, 2001, the Bankruptcy  Court approved a transaction  pursuant to
which the Company and its affected subsidiaries will replace financial assurance
coverage that Frontier Insurance Company  ("Frontier") now provides at more than
100 facilities. Replacement instruments issued pursuant to this transaction will
be provided to the  affected  states on or before July 31, 2001.  The  effective
date of the  instrument  will depend upon state  acceptance of the  instruments,
which the Company and its affected subsidiaries anticipate receiving.

     The Company and its affected subsidiaries  anticipate providing replacement
coverage for Frontier at additional  facilities on or before September 30, 2001.
The Company and its affected  subsidiaries have commenced  negotiations with EPA
regarding an extension beyond September 30, 2001 for facilities not then covered
by compliant  financial  assurance,  primarily  facilities that are inactive and
undergoing  closure.  There can be no  assurance  that these  negotiations  will
succeed.  The failure to replace  Frontier at these sites by September  30, 2001
could result in the imposition of  substantial  penalties on the Company and its
affected  subsidiaries,  although  operations at other, active facilities likely
would not be materially affected.

     The Company and its affected subsidiaries have agreed in principle with the
State of Texas to settle all enforcement activities that the State has commenced
or  threatened  to commence on and after June 1, 2001  pertaining  to  financial
assurance (and other) issues. The Company and its affected  subsidiaries believe
that a settlement  agreement  will be completed  in time for  submission  to the
Bankruptcy Court for consideration during the scheduled August 21, 2001 hearing.
Under  the   settlement,   the  operations  of  the  Company  and  its  affected
subsidiaries in Texas will continue without interruption.


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, Certificate of
Correction  Filed to  Correct  a  Certain  Error  in the  Restated  and  Amended
Certificate of Incorporation of the Company dated October 15, 1997,  Certificate
of Amendment to the Restated  Certificate of  Incorporation of the Company dated
November 25, 1998, and  Certificate of Amendment to the Restated  Certificate of
Incorporation  of the Company  dated  November  30,  1998,  all filed as Exhibit
(3)(a) to the  Registrant's  Form 10-Q for the quarter ended  February 28, 2001,
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.


                                       3
<PAGE>


(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.

(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
<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 Form 10-Q for the
quarter ended May 31, 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  Form 10-Q for the quarter
ended May 31, 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 Company 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,  filed as
Exhibit (4)(n) to the Registrant's  Form 10-Q for the quarter ended November 30,
2000 and incorporated herein by reference.

4)(o) Second Amendment and Waiver, dated as of February 28, 2001, to the Amended
and Restated  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)(o) to the Registrant's Form 10-K/A for the year ended August 31, 2000, filed
on July 9, 2001 and incorporated herein by reference.


                                       5
<PAGE>


(4)(p) Third  Amendment  and Waiver,  dated as of March 28, 2001, to the Amended
and Restated  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)(p) to the Registrant's Form 10-K/A for the year ended August 31, 2000, filed
on July 9, 2001 and incorporated herein by reference.

(4)(q) Fourth  Amendment and Waiver,  dated as of April 30, 2001, to the Amended
and Restated  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)(q) to the Registrant's Form 10-K/A for the year ended August 31, 2000, filed
on July 9, 2001 and incorporated herein by reference.

(4)(r) Letter Agreement among Toronto Dominion (Texas),  Inc., as administrative
agent,  the Company and  Safety-Kleen  Systems,  Inc.  dated  December  12, 2000
relating to the Amended and Restated  Marketing  and  Distribution  Agreement by
Safety-Kleen  Systems,  Inc. and System One Technologies  Inc., filed as Exhibit
(4)(o) to the  Registrant's  Form 10-Q for the quarter ended  February 28, 2001,
and incorporated herein by reference.

(4)(s)  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)(t)  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)(u) 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)(v)  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)(w) 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)(x)  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.


                                       6
<PAGE>


(4)(y) 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)(z)  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)(aa)  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)(bb) 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)(cc)  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)(dd) 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 held 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 Company  filed as Exhibit  (10)(d) to
the  Registrant's  Form 10-K for the year ended August 31, 2000 and incorporated
herein by reference.


                                       7
<PAGE>


(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 Form 10-Q for the quarter ended May
31, 2000 and incorporated herein by reference.

(10)(g)  The  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 for the quarter ended  November 30, 1999 and
incorporated herein by reference.

(10)(i) The 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 for the quarter ended  November 30,
1999 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) The  Company's  U.S.  Supplemental  Executive  Retirement  Plan filed as
Exhibit 10(g) to the Company's Form 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.


                                       8
<PAGE>


(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.

(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 Form 10-Q for the quarter
ended May 31, 2000 and incorporated herein by reference.

(10)(y) Second Amended and Restated Marketing and Distribution Agreement,  dated
as of March 8, 2001 by and between SystemOne  Technologies Inc. and Safety-Kleen
Systems,  Inc.,  a  subsidiary  of the  Registrant,  filed as  Exhibit  10.16 to
SystemOne Technologies Inc. Form 10-KSB for the year ended December 31, 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.

(99.2)  Amended  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  as approved by the United  States
Bankruptcy  Court on May 16, 2001,  filed as Exhibit (99.2) to the  Registrant's
Form  10-K/A  for the year  ended  August  31,  2000,  filed on July 9, 2001 and
incorporated herein by reference.

(b)      Reports on Form 8-K.

i.   The  Company  filed a Current  Report on Form 8-K on March 23,  2001  which
     contained  Items  5  and  7  related  to a  press  release  announcing  the
     appointment of two new directors to the Company's Board of Directors.


                                       9
<PAGE>


ii.  The  Company  filed a  Current  Report  on Form  8-K on May 3,  2001  which
     contained  Items  5  and  7  related  to a  press  release  announcing  the
     appointment of one new director to the Company's Board of Directors.


                                       10
<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:  July 13, 2001                SAFETY-KLEEN CORP.
                                    ------------------
                                       (Registrant)


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


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


                                       11