Document:

<PAGE>   1

                                                                   EXHIBIT 10.11

                                                                  Conformed Copy

              -----------------------------------------------------

                           PHILIP SERVICES CORPORATION

                                       TO

                            WILMINGTON TRUST COMPANY

                                     Trustee

                               -------------------

                                    Indenture

                            Dated as of April 7, 2000

                               -------------------

                                   $64,507,987

                    6% Subordinated Notes due April 15, 2010

              -----------------------------------------------------

<PAGE>   2

                           PHILIP SERVICES CORPORATION

               Reconciliation and tie between Trust Indenture Act
               of 1939 and Indenture, dated as of April 7, 2000.

<TABLE>
<CAPTION>
Trust Indenture                                                              Indenture
 Act Section                                                                  Section
 -----------                                                                  -------
<S>                                                                            <C>
 ss.310(a)(1)     ..........................................................    609
       (a)(2)     ..........................................................    609
       (a)(3)     ..........................................................    Not Applicable
       (a)(4)     ..........................................................    Not Applicable
       (a)(5)     ..........................................................    608
       (b)        ..........................................................    608
       (c)        ..........................................................    Not Applicable
 ss.311(a)        ..........................................................    613
       (b)        ..........................................................    613
       (c)        ..........................................................    Not Applicable
 ss.312(a)        ..........................................................    701
       (b)        ..........................................................    702
       (c)        ..........................................................    702
 ss.313(a)        ..........................................................    703
       (b)        ..........................................................    703
       (c)        ..........................................................    703
       (d)        ..........................................................    703
 ss.314(a)        ..........................................................    704
       (a)(4)     ..........................................................    1008
       (b)        ..........................................................    Not Applicable
       (c)(1)     ..........................................................    102
       (c)(2)     ..........................................................    102
       (c)(3)     ..........................................................    Not Applicable
       (d)        ..........................................................    Not Applicable
       (e)        ..........................................................    102
       (f)        ..........................................................    Not Applicable
 ss.315(a)        ..........................................................    601
       (b)        ..........................................................    603
       (c)        ..........................................................    602
       (d)        ..........................................................    601
       (d)(1)     ..........................................................    601
       (e)        ..........................................................    514
</TABLE>

                                       i

<PAGE>   3

<TABLE>
<CAPTION>
Trust Indenture                                                              Indenture
 Act Section                                                                  Section
 -----------                                                                  -------
<S>                                                                            <C>
 ss.316(a) (last sentence)............................................          101 ("Outstanding")
       (a)(l)(A)          ............................................          512
       (a)(l)(B)          ............................................          513
       (a)(2)             ............................................          Not Applicable
       (b)                ............................................          508
       (c)                ............................................          104
 ss.317(a)(1)             ............................................          503
       (a)(2)             ............................................          504
       (b)                ............................................          1003
 ss.318(a)                ............................................          107
</TABLE>

----------
Note:    This reconciliation and tie shall not, for any purpose, be deemed to be
         a part of the Indenture.

                                       ii

<PAGE>   4

                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                <C>
RECITALS OF THE COMPANY.........................................................   1

                                    ARTICLE 1

                        Definitions and Other Provisions
                             of General Application

SECTION 101. Definitions........................................................   1
Act.............................................................................   2
Affiliate.......................................................................   2
Asset Disposition...............................................................   2
Authenticating Agent............................................................   2
Authority........................................................................  2
Bank............................................................................   3
beneficial owner................................................................   3
Board of Directors..............................................................   3
Board Resolution................................................................   3
Business Day....................................................................   3
Capital Stock...................................................................   3
Change of Control...............................................................   3
Commission......................................................................   3
Common Stock....................................................................   3
Company.........................................................................   3
Company Request.................................................................   3
Company Order...................................................................   3
Consolidated Net Income.........................................................   3
Convertible Subordinated Notes..................................................   4
Corporate Trust Office..........................................................   4
corporation.....................................................................   4
Credit Agreement................................................................   4
Defaulted Interest..............................................................   4
Deferral Period.................................................................   4
Deferral Period Interest........................................................   4
Deferred Interest...............................................................   4
Dollars.........................................................................   4
$...............................................................................   4
Event of Default................................................................   4
Exchange Act....................................................................   4
Expiration Date.................................................................   4
"Exit Facility".................................................................   5
generally accepted accounting principles........................................   5
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                      iii

<PAGE>   5

<TABLE>
<S>                                                                                <C>
Holder..........................................................................    5
Indenture.......................................................................    5
Initial Exit Facility...........................................................    5
Interest Payment Date...........................................................    5
Maturity........................................................................    5
Notice of Default...............................................................    5
Offer...........................................................................    5
Offer Expiration Date...........................................................    5
Offer to Purchase...............................................................    5
Officers' Certificate...........................................................    5
Opinion of Counsel..............................................................    5
Outstanding.....................................................................    5
Paying Agent....................................................................    6
Permitted Holder................................................................    6
Plan............................................................................    6
Person..........................................................................    6
Predecessor Security............................................................    7
Purchase Date...................................................................    7
Purchase Price..................................................................    7
Redeemable Stock................................................................    7
Redemption Date.................................................................    7
Redemption Price................................................................    7
Regular Record Date.............................................................    7
Required Filing Date............................................................    7
Responsible Officer.............................................................    7
Securities......................................................................    7
Securities Act..................................................................    7
Security Register...............................................................    7
Security Registrar..............................................................    7
Senior Indebtedness.............................................................    8
Significant Subsidiary..........................................................    8
Sinking Fund....................................................................    8
Sinking Fund Payment Date.......................................................    8
Special Record Date.............................................................    8
Stated Maturity.................................................................    8
Subsidiary......................................................................    8
Successor Security..............................................................    8
Tendered Security...............................................................    8
Trust Indenture Act.............................................................    8
Trustee.........................................................................    9
U.S. Government Obligations.....................................................    9
United States...................................................................    9
Vice President..................................................................    9
Voting Stock....................................................................    9
Wholly Owned Subsidiary.........................................................    9
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                       iv

<PAGE>   6

<TABLE>
<CAPTION>
                                                                                  Page
                                                                                  ----
<S>                                                                                <C>
SECTION 102. Compliance Certificates and Opinions...............................    9
SECTION 103. Form of Documents Delivered to Trustee.............................   10
SECTION 104. Acts of Holders; Record Date.......................................   10
SECTION 105. Notices. Etc., to Trustee and Company..............................   12
SECTION 106. Notices to Holders: Waiver.........................................   12
SECTION 107. Conflict with Trust Indenture Act..................................   13
SECTION 108. Effect of Headings and Table of Contents...........................   13
SECTION 109. Successors and Assigns.............................................   13
SECTION 110. Separability Clause................................................   13
SECTION 111. Benefits of Indenture..............................................   13
SECTION 112. Governing Law......................................................   13
SECTION 113. Legal Holidays.....................................................   13
SECTION 114. No Recourse Against Others.........................................   14
SECTION 115. Multiple Originals.................................................   14

                                    ARTICLE 2

                                 Security Forms

SECTION 201. Forms Generally....................................................   14
SECTION 202. Form of Face of Security...........................................   14
SECTION 203. Form of Reverse of Security........................................   17
SECTION 204. Form of Trustee's Certificate of Authentication....................   20

                                    ARTICLE 3

                                 The Securities

SECTION 301. Title and Terms....................................................   20
SECTION 302. Denominations......................................................   22
SECTION 303. Execution, Authentication, Delivery and Dating.....................   22
SECTION 304. Temporary Securities...............................................   23
SECTION 305. Registration, Registration of Transfer and Exchange................   24
SECTION 307. Payment of Interest; Interest Rights Preserved.....................   25
SECTION 308. Persons Deemed Owners..............................................   26
SECTION 309. Cancellation.......................................................   27
SECTION 310. Computation of Interest............................................   27
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be
         part of the Indenture.

                                       v

<PAGE>   7

<TABLE>
<CAPTION>
                                                                                  Page
                                                                                  ----
<S>                                                                                <C>
                                    ARTICLE 4

                           Satisfaction and Discharge

SECTION 401. Satisfaction and Discharge of Indenture............................   27
SECTION 402. Application of Trust Money.........................................   28

                                    ARTICLE 5

                                    Remedies

SECTION 501. Events of Default..................................................   28
SECTION 502. Acceleration of Maturity; Rescission and Annulment.................   30
SECTION 503. Collection of Indebtedness and Suits for Enforcement by Trustee....   31
SECTION 504. Trustee May File Proofs of Claim...................................   32
SECTION 505. Trustee May Enforce Claims Without Possession of Securities........   32
SECTION 506. Application of Money Collected.....................................   32
SECTION 507. Limitation on Suits................................................   33
SECTION 508. Unconditional Right of Holders to Receive Principal and Interest...   34
SECTION 509. Restoration of Rights and Remedies.................................   34
SECTION 510. Rights and Remedies Cumulative.....................................   34
SECTION 511. Delay or Omission Not Waiver.......................................   34
SECTION 512. Control by Holders.................................................   34
SECTION 513. Waiver of Past Defaults............................................   35
SECTION 514. Undertaking for Costs..............................................   35
SECTION 515. Waiver of Stay or Extension Laws...................................   35

                                    ARTICLE 6

                                   The Trustee

SECTION 601. Certain Duties and Responsibilities................................   35
SECTION 602. Notice of Defaults.................................................   36
SECTION 603. Certain Rights of Trustee..........................................   37
SECTION 605. May Hold Securities................................................   38
SECTION 606. Money Held in Trust................................................   38
SECTION 607. Compensation and Reimbursement.....................................   38
SECTION 608. Disqualification: Conflicting Interests............................   39
SECTION 609. Corporate Trustee Required; Eligibility............................   39
SECTION 610. Resignation and Removal; Appointment of Successor..................   39
SECTION 611. Acceptance of Appointment by Successor.............................   40
SECTION 612. Merger, Conversion, Consolidation or Succession to Business........   41
SECTION 613. Preferential Collection of Claims Against Company..................   41
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                       vi

<PAGE>   8

<TABLE>
<CAPTION>
                                                                                  Page
                                                                                  ----
<S>                                                                               <C>
SECTION 614. Appointment of Authenticating Agent................................   41
SECTION 701. Company to Furnish Trustee Names and Addresses of Holders..........   42
SECTION 702. Preservation of Information; Communications to Holders.............   43
SECTION 703. Reports by Trustee.................................................   43
SECTION 704. Reports by Company.................................................   43

                                    ARTICLE 8

              Consolidation, Merger, Conveyance, Transfer or Lease

SECTION 801. Company May Consolidate, Etc. Only on Certain Terms................   44
SECTION 802. Successor Substituted..............................................   44

                                    ARTICLE 9

                             Supplemental Indentures

SECTION 901. Supplemental Indentures Without Consent of Holders.................   45
SECTION 902. Supplemental Indentures with Consent of Holders....................   45
SECTION 903. Execution of Supplemental Indentures...............................   46
SECTION 904. Effect of Supplemental Indentures..................................   46
SECTION 905. Conformity with Trust Indenture Act................................   46
SECTION 906. Reference in Securities to Supplemental Indentures.................   46

                                   ARTICLE 10

                                    Covenants

SECTION 1001. Payment of Principal and Interest.................................   47
SECTION 1002. Maintenance of Office or Agency...................................   47
SECTION 1003. Money for Security Payments to be Held in Trust...................   47
SECTION 1004. Existence.........................................................   48
SECTION 1005. Maintenance of Properties.........................................   48
SECTION 1006. Payment of Taxes and Other Claims.................................   49
SECTION 1007. Maintenance of Insurance..........................................   49
SECTION 1008. Limitation on Restricted Payments.................................   49
SECTION 1009. Limitation on Dividend and Other Payment Restrictions
              Affecting Subsidiaries............................................   50
SECTION 1010. Limitation on Distributions of Assets to Shareholders.............   51
SECTION 1011. Statement By Officers as to Default; Compliance Certificates......   51
SECTION 1012. Waiver of Certain Covenants.......................................   51
SECTION 1013. Indemnification of Judgment Currency..............................   52
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                      vii

<PAGE>   9

<TABLE>
<CAPTION>
                                                                                  Page
                                                                                  ----
<S>                                                                               <C>
SECTION 1014. Available Information.............................................   52
SECTION 1015. Acquisition of Securities.........................................   52

                                   ARTICLE 11

                            Redemption of Securities

SECTION 1101. Right of Redemption...............................................   53
SECTION 1102. Applicability of Article..........................................   53
SECTION 1103. Notices to Trustee................................................   53
SECTION 1104. Selection by Trustee of Securities to Be Redeemed.................   53
SECTION 1105. Notice of Redemption..............................................   54
SECTION 1106. Deposit of Redemption Price.......................................   54
SECTION 1107. Securities Payable on Redemption Date.............................   54
SECTION 1108. Securities Redeemed in Part.......................................   55
SECTION 1109. Sinking Fund......................................................   55

                                   ARTICLE 12

                       Defeasance and Covenant Defeasance

SECTION 1201. Company's Option to Effect Defeasance or Covenant Defeasance......   56
SECTION 1202. Defeasance and Discharge..........................................   56
SECTION 1203. Covenant Defeasance...............................................   56
SECTION 1204. Conditions to Defeasance or Covenant Defeasance...................   56
SECTION 1205. Deposited Money and U.S. Government Obligations to be Held
              in Trust: Other Miscellaneous Provisions..........................   58
SECTION 1206. Reinstatement.....................................................   59

                                   ARTICLE 13

                           Subordination of Securities

SECTION 1301. Securities Subordinated to Senior Indebtedness....................   59
SECTION 1302. No Payments in Certain Circumstances;
              Payment Over of Proceeds Upon Dissolution, Etc....................   60
SECTION 1303. Notice to Trustee of Specified Events; Reliance on
              Certificate of Liquidating Agent..................................   61
SECTION 1304. Trustee to Effectuate Subordination...............................   62
SECTION 1305. Trustee Not Charged with Knowledge of Prohibition.................   62
SECTION 1306. Trustee Not Fiduciary for Holders of Senior Indebtedness..........   63
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be
         part of the Indenture.

                                      viii

<PAGE>   10

<TABLE>
<CAPTION>
                                                                                  Page
                                                                                  ----
<S>                                                                               <C>
SECTION 1307. Rights of Trustee as Holder of Senior Indebtedness;
              Preservation of Trustee's Rights..................................   63
SECTION 1308. Article Applicable to Paying Agents...............................   63

                                   ARTICLE 14

                                Change of Control

SECTION 1401. Change of Control.................................................   63
SECTION 1402. Certain Definitions...............................................   64
SECTION 1403. Deferral Period...................................................   66

TESTIMONIUM

SIGNATURES
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                       ix
<PAGE>   11

     INDENTURE, dated as of April 7, 2000 between Philip Services Corporation, a
corporation duly organized and existing under the laws of Delaware (herein
called the "Company"), having its principal office at 100 King Street West,
Hamilton, Ontario, Canada L8N 4T6 and Wilmington Trust Company, a banking
corporation duly organized and existing under the laws of the State of Delaware,
as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

     The Company has duly authorized the creation of an issue of its 6% Senior
Subordinated Notes due April 15, 2010 of substantially the tenor and amount
hereinafter set forth, and to provide therefor the Company has duly authorized
the execution and delivery of this Indenture.

     All things necessary to make the Securities, when executed by the Company
and authenticated and delivered hereunder and duly issued by the Company, the
valid obligations of the Company, and to make this Indenture a valid agreement
of the Company, in accordance with their and its terms, have been done.

     NOW, THEREFORE, THIS INDENTURE WITNESSETH:

     For and in consideration of the premises and the purchase of the Securities
by the Holders thereof, it is mutually covenanted and agreed, for the equal and
proportionate benefit of all Holders of the Securities, as follows:

                                    ARTICLE 1

                        Definitions and Other Provisions
                             of General Application

SECTION 101.  Definitions.

     For all purposes of this Indenture, except as otherwise expressly provided
or unless the context otherwise requires:

          (1) the terms defined in this Article have the meanings assigned to
     them in this Article and include the plural as well as the singular;

          (2) all other terms used herein which are defined in the Trust
     Indenture Act, either directly or by reference therein, have the meanings
     assigned to them therein;

          (3) all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with generally accepted accounting
     principles in the United States (whether or not such is indicated herein),
     and, except as otherwise herein expressly provided, the term "generally
     accepted accounting principles" with respect to any computation required or
     permitted hereunder shall mean such accounting principles as are

                                        1

<PAGE>   12

     generally accepted in the United States as consistently applied by the
     Company at the date of such computation;

          (4) unless the context otherwise requires, any reference to an
     "Article" or a "Section", or to an "Annex" or a "Schedule", refers to an
     Article or Section of, or to an Annex or a Schedule attached to, this
     Indenture, as the case may be;

          (5) unless the context otherwise requires, any reference to a statute,
     rule or regulation refers to the same (including any successor statute,
     rule or regulation thereto) as it may be amended from time to time;

          (6) unless otherwise specifically set forth herein, all calculations
     or determinations of a Person shall be performed or made on a consolidated
     basis in accordance with generally accepted accounting principles; and

          (7) the words "herein", "hereof" and "hereunder" and other words of
     similar import refer to this Indenture as a whole and not to any particular
     Article, Section or other subdivision.

          "Act", when used with respect to any Holder, has the meaning specified
     in Section 104.

     "Affiliate" of any Person means any other Person directly or indirectly
controlling or controlled by or under direct or indirect common control with
such Person. For the purposes of this definition, "control" when used with
respect to any Person means the power to direct the management and policies of
such Person, directly or indirectly, whether through the ownership of voting
securities, by contract or otherwise; and the terms "controlling" and
"controlled" have meanings correlative to the foregoing.

     "Asset Disposition" means any transfer, conveyance, sale, lease or other
disposition by the Company or any of its Subsidiaries (including a consolidation
or merger or other sale of any such Subsidiary with, into or to another Person
in a transaction in which such Subsidiary ceases to be a Subsidiary, but
excluding a disposition by a Subsidiary of the Company to the Company or a
Wholly Owned Subsidiary of the Company or by the Company to a Wholly Owned
Subsidiary of the Company) of (i) shares of Capital Stock (other than directors'
qualifying shares) or other ownership interests of a Subsidiary of the Company,
(ii) substantially all of the assets of the Company or any of its Subsidiaries
representing a division or line of business or (iii) other assets or rights of
the Company or any of its Subsidiaries outside of the ordinary course of
business, provided in each of the foregoing instances that the aggregate
consideration for such transfer, conveyance, sale, lease or other disposition is
equal to $10 million or more.

     "Authenticating Agent" means any Person authorized by the Trustee pursuant
to Section 614 to act on behalf of the Trustee to authenticate Securities.

     "Authority" means any federal, state, provincial, municipal, or local
government or quasi-governmental agency or authority.

                                        2

<PAGE>   13

     "Bank" means a "bank" as defined in section 3(a)(6) of the Exchange Act as
well as any other financial institution, foreign or otherwise, a substantial
portion of the business of which consists of receiving deposits or exercising a
fiduciary power similar to those permitted to national banks under the authority
of the Comptroller of the Currency pursuant to the first section of Public Law
87-722.

     "beneficial owner" has the meaning specified in Section 1402(1).

     "Board of Directors" means either the board of directors of the Company or
any duly authorized committee of that board authorized to act for it in respect
hereof.

     "Board Resolution" means a copy of a resolution certified by the Secretary
or an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

     "Business Day" means each Monday, Tuesday, Wednesday, Thursday and Friday
which is not a day on which banking institutions in The City of New York, New
York or Wilmington, Delaware are authorized or obligated by law or executive
order to close.

     "Capital Stock" of any Person means any and all shares, interests,
participations or other equivalents (however designated) of corporate stock or
other equity participations, including partnership interests, whether general or
limited, of such Person.

     "Change of Control" has the meaning specified in Section 1402(2).

     "Commission" means the United States Securities and Exchange Commission, as
from time to time constituted, created under the Exchange Act, or, if at any
time after the execution of this instrument such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act, then the
body performing such duties at such time.

     "Common Stock" of any Person means Capital Stock of such Person that does
not rank prior, as to the payment of dividends or as to the distribution of
assets upon any voluntary or involuntary liquidation, dissolution or winding up
of such Person, to shares of Capital Stock of any other class of such Person.

     "Company" means the Person named as the "Company" in the first paragraph of
this instrument until a successor Person shall have become such pursuant to the
applicable provisions of this Indenture and thereafter "Company" shall mean such
successor Person.

     "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman of the Board, its President or
a Vice President, and by its Vice President, Finance, its Treasurer, an
Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered to
the Trustee.

     "Consolidated Net Income" for any period means the consolidated net income
(or loss) of the Company and its Subsidiaries for such period determined on a
consolidated basis in accordance with generally accepted accounting principles;
provided that there shall be excluded

                                        3

<PAGE>   14

therefrom (a) gains or losses on Asset Dispositions by the Company or its
Subsidiaries, (b) all extraordinary gains and extraordinary losses, and (c) the
tax effect of any of the items described in clauses (a) and (b) above.

     "Convertible Subordinated Notes" means the 3% Convertible Subordinated
Notes due April 15, 2020 of the Company.

     "Corporate Trust Office" means the office of the Trustee in the City of
Wilmington, Delaware, which office at the date of this Indenture is located at
Rodney Square North, 1100 North Market Street, Wilmington, Delaware, 19890,
Attention: Corporate Trust Administration, at which at any particular time its
corporate trust business may be administered.

     "corporation" means a corporation, association, company, joint-stock
company, limited liability company, partnership or business trust.

     "Credit Agreement" means the Secured PIK/Term Credit Agreement, dated as of
April 7, 2000, among the Company, Subsidiaries of the Company named therein,
Canadian Imperial Bank of Commerce as administrative agent and the various
persons from time to time parties to such agreement as lenders, providing for
the PIK Loans and the Term Loans (as such terms are defined in such agreement),
as the same may be amended, renewed, extended, refinanced, replaced or refunded
from time to time, together with any documents entered into in connection
therewith, including collateral agency and intercreditor agreements.

     "Defaulted Interest" has the meaning specified in Section 307.

     "Deferral Period", in connection with a Change of Control, means the period
commencing on the date of this Indenture and ending on the earliest to occur of
(i) the stated maturity of the Initial Exit Facility; (ii) the acceleration of
amounts due under the Initial Exit Facility and written notice of which is
received by the Trustee; and (iii) the refinancing or replacement of the Initial
Exit Facility, which refinancing or replacement is consummated substantially
concurrently with the Change of Control and written notice of which is received
by the Trustee.

     "Deferral Period Interest" has the meaning specified in Section 301.

     "Deferred Interest" has the meaning specified in Section 301.

     "Dollars" and "$" means such coins or currency of the United States of
America which is legal tender for payment of public and private debts.

     "Event of Default" has the meaning specified in Section 501.

     "Exchange Act" refers to the Securities Exchange Act of 1934 as it may be
amended and any successor act thereto.

     "Expiration Date" has the meaning specified in Section 104.

                                        4

<PAGE>   15

     "Exit Facility" means the loan agreement, dated as of April 7, 2000, among
the Company, Subsidiaries of the Company named therein, Foothill Capital
Corporation as arranger and administrative agent, and the various persons from
time to time party to such agreement as lenders, as the same may be amended,
renewed, extended, refinanced, replaced or refunded from time to time, together
with any documents entered into in connection therewith, including collateral
agency and intercreditor agreements.

     "generally accepted accounting principles" means, as at any date of
determination, generally accepted accounting principles in the United States
(unless otherwise indicated) and which are applicable as of the date of
determination.

     "Holder" means a Person in whose name a Security is registered in the
Security Register.

     "Indenture" means this instrument as originally executed or as it may from
time to time be supplemented or amended by one or more indentures supplemental
hereto entered into pursuant to the applicable provisions hereof including, for
all purposes of this instrument and any such supplemental indenture, the Annexes
attached to this instrument.

     "Initial Exit Facility" means the Exit Facility as executed on April 7,
2000, which facility has a stated maturity of September 30, 2002.

     "Interest Payment Date" means the Stated Maturity of an instalment of
interest on the Securities.

     "Maturity", when used with respect to any Security, means the date on which
the principal of such Security becomes due and payable as therein or herein
provided, whether at the Stated Maturity or by declaration of acceleration, call
for redemption, exercise of the repurchase right or otherwise.

     "Notice of Default" means a written notice of the kind specified in Section
501(5).

     "Offer" has the meaning specified in Section 1402(3).

     "Offer Expiration Date" has the meaning specified in Section 1402(4).

     "Offer to Purchase" has the meaning specified in Section 1402(5).

     "Officers' Certificate" means a certificate signed by the Chairman of the
Board, the President or a Vice President, and by the Treasurer, an Assistant
Treasurer, the Secretary or an Assistant Secretary, of the Company, and
delivered to the Trustee.

     "Opinion of Counsel" means a written opinion of counsel, who may be counsel
for the Company, and who shall be acceptable to the Trustee.

     "Outstanding", when used with respect to Securities, means, as of the date
of determination, all Securities theretofore authenticated and delivered under
this Indenture, except:

                                        5

<PAGE>   16

          (i) Securities theretofore cancelled by the Trustee or delivered to
     the Trustee for cancellation;

          (ii) Securities for whose payment or redemption money in the necessary
     amount has been theretofore deposited with the Trustee or any Paying Agent
     (other than the Company) in trust or set aside and segregated in trust by
     the Company (if the Company shall act as its own Paying Agent) for the
     Holders of such Securities; provided that, if such Securities are to be
     redeemed, notice of such redemption has been duly given pursuant to this
     Indenture or provision therefor satisfactory to the Trustee has been made;

          (iii) Securities, except to the extent provided in Sections 1202 and
     1203, with respect to which the Company has effected defeasance and/or
     covenant defeasance as provided in Article Twelve; and

          (iv) Securities which have been paid pursuant to Section 306 or in
     exchange for or in lieu of which other Securities have been authenticated
     and delivered pursuant to this Indenture, other than any such Securities in
     respect of which there shall have been presented to the Trustee proof
     satisfactory to it that such Securities are held by a bona fide purchaser
     in whose hands such Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such request, demand, authorization, direction, notice,
consent or waiver or other action, only Securities which the Trustee knows to be
so owned shall be so disregarded. Securities so owned which have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

          "Paying Agent" means any Person authorized by the Company to pay the
     principal of or interest on any Securities on behalf of the Company.

          "Permitted Holder" means any Person that beneficially owns more than
     10% of the outstanding Common Stock of the Company as of the date of this
     Indenture, after giving effect to the distributions of Common Stock of the
     Company under the Plan.

          "Plan" means the First Amended Joint Plan of Reorganization of Philip
     Services (Delaware), Inc., et al, dated September 21, 1999, in the United
     States Bankruptcy Court for the District of Delaware.

          "Person" means any individual, corporation, partnership,joint venture,
     trust, limited liability company, unincorporated organization or government
     or any agency or political subdivision thereof. For purposes of Article 14,
     "Person" has the meaning specified in Section 1402(6).

                                        6

<PAGE>   17

     "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

     "Purchase Date" has the meaning specified in Section 1402(5).

     "Purchase Price" has the meaning specified in Section 1402(7).

     "Redeemable Stock" of any Person means any Capital Stock of such Person
that by its terms (or by the terms of any security into which it is convertible
or for which it is exchangeable) or otherwise (including upon the occurrence of
an event) matures or is required to be redeemed (pursuant to any sinking fund
obligation or otherwise) or is convertible into or exchangeable for indebtedness
or is redeemable at the option of the holder thereof, in whole or in part, at
any time prior to the final Stated Maturity of the Securities;

     "Redemption Date", when used with respect to any Security to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

     "Redemption Price", when used with respect to any Security to be redeemed,
means the price at which it is to be redeemed pursuant to this Indenture.

     "Regular Record Date" for the interest payable on any Interest Payment Date
means the April 1 or October 1 (whether or not a Business Day), as the case may
be, next preceding such Interest Payment Date.

     "Required Filing Date" has the meaning specified in Section 1011.

     "Responsible Officer", when used with respect to the Trustee, means the
chairman or any vice-chairman of the board of directors, the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee, the president, any vice president, the secretary, any
assistant secretary, the treasurer, any assistant treasurer, the cashier, any
assistant cashier, any trust officer or assistant trust officer, the controller
or any assistant controller or any other officer of the Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate trust matter,
any other officer to whom such matter is referred because of his knowledge of
and familiarity with the particular subject.

     "Securities" or "Security" means securities designated in the first
paragraph of the RECITALS OF THE COMPANY.

     "Securities Act" means the U.S. Securities Act of 1933 and (unless the
context otherwise requires) includes the rules and regulations of the Commission
promulgated thereunder.

     "Security Register" and "Security Registrar" have the respective meanings
specified in Section 305.

                                        7

<PAGE>   18

     "Senior Indebtedness" has the meaning specified in Section 1301.

     "Significant Subsidiary" means, at any date of determination, (a) any
Subsidiary of the Company that, together with any of its Subsidiaries (i) for
the most recent fiscal year of the Company accounted for more than 15% of the
consolidated revenues of the Company and its Subsidiaries or (ii) as of the end
of such fiscal year, owned more than 15% of the consolidated assets of the
Company and its Subsidiaries, all as set forth on the consolidated financial
statements of the Company and its Subsidiaries for such year prepared in
accordance with generally accepted accounting principles.

     "Sinking Fund" means the method provided in this Indenture and the
Securities for amortizing the principal amount of the Securities.

     "Sinking Fund Payment Date" means April 15, 2006, April 15, 2007, April 15,
2008 and April 15, 2009.

     "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 307.

     "Stated Maturity", when used with respect to any Security or any
installment of interest thereon, means the date specified in such Security as
the fixed date on which the principal of such Security or such installment of
interest is due and payable.

     "Subsidiary" of any Person means (i) a corporation more than 50% of the
combined voting power of the outstanding Voting Stock of which is owned,
directly or indirectly, by such Person or by one or more other Subsidiaries of
such Person or by such Person and one or more Subsidiaries thereof, (ii) any
other Person (other than a corporation) in which such Person, or one or more
other Subsidiaries of such Person or such Person and one or more other
Subsidiaries thereof, directly or indirectly, has at least a majority ownership
and power to direct the policies, management and affairs thereof or (iii) any
other Person not described in clauses (i) and (ii) above in which such Person,
or one more other Subsidiaries of such Person or such Person and one or more
other Subsidiaries thereof, directly or indirectly, has a 50% ownership and the
power, pursuant to a written contract or agreement, to direct the policies and
management or the financial and other affairs thereof.

     "Successor Security" of any particular Security means every Security issued
after, and evidencing all or a portion of the same debt as that evidenced by,
such particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

     "Tendered Security" has the meaning specified in Section 301.

     "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force at
the date as of which this instrument was executed, except as provided in Section
905; provided, however, that in the event the Trust Indenture Act of 1939 is
amended after such date, "Trust Indenture Act"

                                        8

<PAGE>   19

means, to the extent required by any such amendment, the Trust Indenture Act of
1939 as so amended.

     "Trustee" means the Person named as the "Trustee" in the first paragraph of
this Indenture until a successor Trustee shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Trustee" shall mean
such successor Trustee.

     "U.S. Government Obligations" has the meaning specified in Section 1204.

     "United States" means the United States of America (including the States
thereof and the District of Columbia), its territories, its possessions and
other areas subject to its jurisdiction.

     "Vice President", when used with respect to the Company or the Trustee,
means any vice president, whether or not designated by a number or a word or
words added before or after the title "vice president".

     "Voting Stock" of any Person means Capital Stock of such Person which
ordinarily has voting power for the election of directors (or persons performing
similar functions) of such Person, whether at all times or only so long as no
senior class of securities has such voting power by reason of any contingency.

     "Wholly Owned Subsidiary" of any Person means a Subsidiary of such Person
all of the outstanding Capital Stock or other ownership interests of which
(other than directors' qualifying shares) shall at the time be owned by such
Person or by one or more Wholly Owned Subsidiaries of such Person or by such
Person and one or more Wholly Owned Subsidiaries of such Person;

SECTION 102.  Compliance Certificates and Opinions.

     Upon any application or request by the Company to the Trustee to take any
action under any provision of this Indenture, the Company shall furnish to the
Trustee such certificates and opinions as may be required under the Trust
Indenture Act. Each such certificate or opinion shall be given in the form of an
Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirement set forth in
this Indenture.

     Every certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include

          (1) a statement that each individual signing such certificate or
     opinion has read such covenant or condition and the definitions herein
     relating thereto;

          (2) a brief statement as to the nature and scope of the examination or
     investigation upon which the statements or opinions contained in such
     certificate or opinion are based;

          (3) a statement that, in the opinion of each such individual, he has
     made such examination or investigation as is necessary to enable him to
     express an informed opinion as to

                                        9

<PAGE>   20

     whether or not such covenant or condition has been complied with (which, in
     the case of an Opinion of Counsel may be limited to reliance on an
     Officers' Certificate as to matters of fact); and

          (4) a statement as to whether, in the opinion of each such individual,
     such condition or covenant has been complied with.

SECTION 103.  Form of Documents Delivered to Trustee.

     In any case where several matters are required to be certified by, or
covered by an opinion of, any specified Person, it is not necessary that all
such matters be certified by, or covered by the opinion of, only one such
Person, or that they be so certified or covered by only one document, but one
such Person may certify or give an opinion with respect to some matters and one
or more other such Persons as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

     Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or opinion of counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.

     Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

SECTION 104.  Acts of Holders; Record Date.

     Any request, demand, authorization, direction, notice, consent, waiver or
other action provided by this Indenture to be given or taken by Holders may be
embodied in and evidenced by one or more instruments of substantially similar
tenor signed by such Holders in person or by agent duly appointed in writing;
and, except as herein otherwise expressly provided, such action shall become
effective when such instrument or instruments are delivered to the Trustee and,
where it is hereby expressly required, to the Company. Such instrument or
instruments (and the action embodied therein and evidenced thereby) are herein
sometimes referred to as the "Act" of the Holders signing such instrument or
instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose of this Indenture
and (subject to Section 601) conclusive in favor of the Trustee and the Company,
if made in the manner provided in this Section.

     The fact and date of the execution by any Person of any such instrument or
writing may be proved by the affidavit of a witness of such execution or by a
certificate of a notary public or other officer authorized by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a signer acting in a capacity other than his individual capacity, such
certificate or affidavit shall also constitute sufficient proof

                                       10

<PAGE>   21

of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other manner which the Trustee deems sufficient.

     The ownership of Securities shall be proved by the Security Register.

     Any request, demand, authorization, direction, notice, consent, waiver or
other Act of the Holder of any Security shall bind every future Holder of the
same Security and the Holder of every Security issued upon the registration of
transfer thereof or in exchange therefor or in lieu thereof in respect of
anything done, omitted or suffered to be done by the Trustee or the Company in
reliance thereon, whether or not notation of such action is made upon such
Security.

     The Company may set any day as a record date for the purpose of determining
the Holders of Outstanding Securities entitled to give, make or take any
request, demand, authorization, direction, notice, consent, waiver or other
action provided or permitted by this Indenture to be given, made or taken by
Holders of Securities, provided that the Company may not set a record date for,
and the provisions of this paragraph shall not apply with respect to, the giving
or making of any notice, declaration, request or direction referred to in the
next paragraph. If not set by the Company prior to the first solicitation of a
Holder made by any Person in respect of any such matter referred to in the
foregoing sentence, the record date for any such matter shall be the 30th day
(or, if later, the date of the most recent list of Holders required to be
provided pursuant to Section 701) prior to such first solicitation. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities on such record date, and no other Holders, shall be entitled to take
the relevant action, whether or not such Holders remain Holders after such
record date; provided that no such action shall be effective hereunder unless
taken on or prior to the applicable Expiration Date by Holders of the requisite
principal amount of Outstanding Securities on such record date. Nothing in this
paragraph shall be construed to prevent the Company from setting a new record
date for any action for which a record date has previously been set pursuant to
this paragraph (whereupon the record date previously set shall automatically and
with no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities on the date such
action is taken. Promptly after any record date is set pursuant to this
paragraph, the Company, at its own expense, shall cause notice of such record
date, the proposed action by Holders and the applicable Expiration Date to be
given to the Trustee in writing and to each Holder of Securities in the manner
set forth in Section 106.

     The Trustee may set any day as a record date for the purpose of determining
the Holders of Outstanding Securities entitled to join in the giving or making
of (i) any Notice of Default, (ii) any declaration of acceleration referred to
in Section 502, (iii) any request to institute proceedings referred to in
Section 507(2) or (iv) any direction referred to in Section 512. If any record
date is set pursuant to this paragraph, the Holders of Outstanding Securities on
such record date, and no other Holders, shall be entitled to join in such
notice, declaration, request or direction, whether or not such Holders remain
Holders after such record date; provided that no such action shall be effective
hereunder unless taken on or prior to the applicable Expiration Date by Holders
of the requisite principal amount of Outstanding Securities on such record date.
Nothing in this paragraph shall be construed to prevent the Trustee from setting
a new record date for any action for which a record date has previously been set
pursuant to this paragraph (whereupon the record date previously set shall
automatically and with no action by any Person be cancelled and of no effect),
and nothing in this paragraph shall be construed to render ineffective any
action taken by Holders of the requisite principal amount of Outstanding
Securities on the date such action is taken. Promptly after any record date is
set pursuant to this paragraph, the Trustee, at the Company's expense, shall
cause notice of such record

                                       11

<PAGE>   22

date, the proposed action by Holders and the applicable Expiration Date to be
given to the Company in writing and to each Holder of Securities in the manner
set forth in Section 106.

     With respect to any record date set pursuant to this Section, the party
hereto which sets such record dates may designate any day as the "Expiration
Date" and from time to time may change the Expiration Date to any earlier or
later day; provided that no such change shall be effective unless notice of the
proposed new Expiration Date is given to the other party hereto in writing, and
to each Holder of Securities in the manner set forth in Section 106, on or prior
to the existing Expiration Date. If an Expiration Date is not designated with
respect to any record date set pursuant to this Section, the party hereto which
set such record date shall be deemed to have initially designated the 180th day
after such record date as the Expiration Date with respect thereto, subject to
its right to change the Expiration Date as provided in this paragraph.
Notwithstanding the foregoing, no Expiration Date shall be later than the 180th
day after the applicable record date.

     Without limiting the foregoing, a Holder entitled hereunder to take any
action hereunder with regard to any particular Security may do so with regard to
all or any part of the principal amount of such Security or by one or more duly
appointed agents each of which may do so pursuant to such appointment with
regard to all or any part of such principal amount.

SECTION 105.  Notices. Etc., to Trustee and Company.

     Any request, demand, authorization, direction, notice, consent, waiver or
Act of Holders or other document provided or permitted by this Indenture to be
made upon, given or furnished to, or filed with,

          (1) the Trustee by any Holder or by the Company shall be sufficient
     for every purpose hereunder if made, given, furnished or filed in writing
     to or with the Trustee and received at its Corporate Trust Office or to it
     at Wilmington Trust Company, Rodney Square North, 1100 North Market Street,
     Wilmington, Delaware 19890, Attention: Corporate Trust Administration, or

          (2) the Company by the Trustee or by any Holder shall be sufficient
     for every purpose hereunder (unless otherwise herein expressly provided) if
     in writing and mailed, first-class postage prepaid, to the Company
     addressed to it at the address of its principal office specified in the
     first paragraph of this instrument or at any other address previously
     furnished in writing to the Trustee by the Company.

SECTION 106.  Notices to Holders: Waiver.

     Where this Indenture provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if in writing and mailed, first-class postage prepaid, to each Holder affected
by such event, at his address as it appears in the Security Register, not later
than the latest date (if any), and not earlier than the earliest date (if any),
prescribed for the giving of such notice. In any case where notice to Holders is
given by mail, neither the failure to mail such notice, nor any defect in any
notice so mailed, to any particular Holder shall affect the sufficiency of such
notice with respect to other Holders. Where this Indenture provides for notice
in any manner, such notice may be waived in writing by the Person entitled to
receive such notice, either before or after the event, and such waiver shall be
the equivalent of such notice. Waivers of notice by Holders shall be filed with
the Trustee, but such filing shall not be a condition precedent to the validity
of any action taken in reliance upon such waiver.

                                       12

<PAGE>   23

     In case by reason of the suspension of regular mail service or by reason of
any other cause it shall be impracticable to give such notice by mail, then such
notification as shall be made with the approval of the Trustee shall constitute
a sufficient notification for every purpose hereunder.

SECTION 107.  Conflict with Trust Indenture Act.

     If any provision hereof limits, qualifies or conflicts with a provision of
the Trust Indenture Act that is required under such Act to be a part of and
govern this Indenture, the latter provision shall control. If any provision of
this Indenture modifies or excludes any provision of the Trust Indenture Act
that may be so modified or excluded, the latter provision shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.

SECTION 108.  Effect of Headings and Table of Contents.

     The Article and Section headings herein and the Table of Contents are for
convenience only and shall not affect the construction hereof.

SECTION 109.  Successors and Assigns.

     All covenants and agreements in this Indenture by the Company shall bind
its successors and assigns, whether so expressed or not.

SECTION 110.  Separability Clause.

     In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

SECTION 111.  Benefits of Indenture.

     Nothing in this Indenture or in the Securities, express or implied, shall
give to any Person, other than the parties hereto and their successors hereunder
and the Holders of Securities, any benefit or any legal or equitable right,
remedy or claim under this Indenture. This provisions of Article Thirteen are
intended to be for the benefit of, and shall be enforceable directly by, holders
of Senior Indebtedness.

SECTION 112.  Governing Law.

     THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

SECTION 113.  Legal Holidays.

     In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security shall not be a Business Day, then (notwithstanding any
other provision of this Indenture or of the Securities) payment of interest or
principal need not be made on such date, but may be made on the next succeeding
Business Day with the same force and effect as if made on the Interest Payment
Date or

                                       13

<PAGE>   24

Redemption Date, or at the Stated Maturity, provided that no interest shall
accrue for the period from and after such Interest Payment Date, Redemption Date
or Stated Maturity, as the case may be.

SECTION 114.  No Recourse Against Others.

     A director, officer, employee or shareholder, as such, of the Company shall
not have any liability for any obligations of the Company under the Securities
or this Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. By accepting a Security, each Holder shall waive
and release all such liability. Such waiver and release shall be part of the
consideration for the issue of the Securities.

SECTION 115.  Multiple Originals.

     The parties may sign any number of copies of this Indenture. Each signed
copy shall be an original, but all of them together represent the same
agreement. One signed copy is enough to prove this Indenture.

                                    ARTICLE 2

                                 Security Forms

SECTION 201.  Forms Generally.

     The Securities and the Trustee's certificates of authentication shall be in
substantially the forms set forth in this Article, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be
required to comply with the rules of any securities exchange or as may,
consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities.

     Securities shall be issued in definitive, fully registered form without
interest coupons, substantially in the form of Security set forth in Sections
202 and 203. The definitive Securities shall be printed, lithographed or
engraved or produced by any combination of these methods on steel engraved
borders or may be produced in any other manner, provided that such manner is
permitted by the rules of any securities exchange on which the Securities may be
listed, all as determined by the officers executing such Securities, as
evidenced by their execution of such Securities.

SECTION 202.  Form of Face of Security.

                           PHILIP SERVICES CORPORATION

                    6% Subordinated Notes due April 15, 2010

CUSIP No. 718193 AA 3

No. _______________                                             $_______________

                                       14

<PAGE>   25

     Philip Services Corporation a corporation duly organized and existing under
the laws of Delaware (herein called the "Company", which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to __________, or registered assigns, the
principal sum of __________ Dollars on April 15, 2010, and to pay interest from
April 7, 2000 or from the most recent Interest Payment Date to which interest
has been paid or duly provided for, semi-annually on April 15 and October 15 in
each year, commencing October 15, 2000, (a) at the rate of 6% per annum on the
principal amount, until the principal hereof is paid or made available for
payment, or (b)(i) if a Change of Control occurs during the Deferral Period,
(ii) this Security has been tendered and not withdrawn pursuant to an Offer to
Purchase prior to the close of business on the Offer Expiration Date, and (iii)
the Company has not purchased this Security pursuant to Section 1403 of the
Indenture (a "Tendered Security"), at the rate of 12% per annum on the Purchase
Price of this Security from the day after the Offer Expiration Date until the
termination of the Deferral Period ("Deferral Period Interest"); provided that,
for greater certainty, interest payable after the termination of the Deferral
Period shall be payable on the full principal amount hereof.

     The interest so payable, and punctually paid or duly provided for, on any
Interest Payment Date will, as provided in such Indenture, be paid to the Person
in whose name this Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest, which shall be the April 1 or October 1 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date. Any such
interest, other than Deferral Period Interest, not so punctually paid or duly
provided for will forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on a
Special Record Date for the payment of such Defaulted Interest to be fixed by
the Trustee, notice whereof shall be given to Holders of Securities not less
than 10 days prior to such Special Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and upon such notice as may be
required by such exchange, all as more fully provided in said Indenture.
Interest on this Security shall be computed on the basis set forth in the
Indenture.

     For interest payments, other than payments of Deferral Period Interest, due
on each Interest Payment Date occurring on or prior to April 15, 2005, the
Company may, at its option, subject to and in accordance with the provisions of
this Security and the Indenture, issue additional Securities in lieu of the
payment in cash of the interest due and payable on such Interest Payment Date.
If the Company elects to issue Additional Securities in lieu of the payment in
cash of such interest, it need not give notice of such election to the Holders
and the Trustee prior to such Interest Payment Date, and shall execute and
deliver to the Trustee for authentication, and the Trustee shall authenticate
and deliver to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on such Regular
Record Date, additional Securities dated such Interest Payment Date in an
aggregate principal amount equal to the amount of cash interest that would be
payable on such Interest Payment Date (such additional Securities being referred
to herein as the "Additional Securities"), and the due issuance of such
Additional Securities shall constitute full payment of such portion of interest;
provided, however, that the Company shall not issue Additional Securities in any
denomination of less than $1.00 and the principal amount of Additional
Securities to be issued to any Holder in lieu of the payment of cash interest
shall be rounded down to the nearest $1.00. If the Company elects to make such
interest payment in cash, it shall give notice of such election to the Holders
and the Trustee not less than thirty days prior to such Interest Payment Date.

     One half of the Deferral Period Interest will accrue on the Purchase Price
of this Security and be paid in cash on the Interest Payment Date to the Person
in whose name this Security (or one or more

                                       15

<PAGE>   26

Predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest. The other half of the Deferral Period Interest
will accrue on the Purchase Price of this Security until the termination of the
Deferral Period but will only be paid in cash on the fifth Business Day after
the termination of the Deferral Period to the Person in whose name this Security
(or one or more Predecessor Securities) is registered ("Deferred Interest") on
the date of such termination. The Company's obligation to pay Deferral Period
Interest shall at all times be limited by and subject to the provisions of
Article 13 of the Indenture.

     Payment of the principal of and interest on this Security will be made at
the office or agency of the Company maintained for that purpose in the City of
Wilmington, Delaware and at any other office or agency maintained by the Company
for such purpose, in such coin or currency of the United States of America as at
the time of payment is legal tender for payment of public and private debts (in
the case of cash interest); provided, however, that at the option of the Company
payment of interest may be made by check (for cash interest) or certificates
representing Additional Securities mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

     Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

     Unless the certificate of authentication hereon has been executed by the
Trustee referred to on the reverse hereof by manual signature, this Security
shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

     IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:

                                        PHILIP SERVICES CORPORATION

[CORPORATE SEAL]

                                        By: ____________________________________
                                            Name:
                                            Title:

Attest:

________________________________________
Name:
Title:

                                       16

<PAGE>   27

SECTION 203.  Form of Reverse of Security.

     This Security is one of a duly authorized issue of Securities of the
Company designated as its 6% Subordinated Notes due April 15, 2010 (herein
called the "Securities"), limited (except as otherwise provided in the Indenture
referred to below) in aggregate principal amount to $64,507,987, issued and to
be issued under an Indenture, dated as of April 7, 2000 (herein called the
"Indenture"), between the Company and Wilmington Trust Company, as Trustee
(herein called the "Trustee", which term includes any successor trustee under
the Indenture), to which Indenture and all indentures supplemental thereto
reference is hereby made for a statement of the respective rights, limitations
of rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Securities and of the terms upon which the Securities are, and
are to be, authenticated and delivered.

     The Securities are subject to redemption upon not less than 30 nor more
than 60 days' notice by mail, at any time, as a whole or in part, at the
election of the Company, at a Redemption Price equal to 100% of the principal
amount then outstanding, together in the case of any such redemption with
accrued interest to but excluding the Redemption Date, but interest installments
whose Stated Maturity is on or prior to such Redemption Date will be payable to
the Holders of such Securities, or one or more Predecessor Securities, of record
at the close of business on the relevant Regular Record Dates referred to on the
face hereof, all as provided in the Indenture.

     As more fully set forth in the Indenture, provided that there is no default
in any Senior Indebtedness, the Company is required to redeem on April 15, 2006,
April 15, 2007, April 15, 2008 and April 15, 2009, a portion of the principal
amount of the Securities at a Redemption Price equal to 100% of the aggregate
principal amount of the Securities so redeemed, plus accrued and unpaid interest
to the Redemption Date.

     Within 30 days of the occurrence of a Change of Control, the Company will
be required to mail an Offer with respect to an Offer to Purchase all
Outstanding Securities at a purchase price equal to the sum of (x) the present
value of the remaining scheduled payments of principal and interest of the
Securities (not including the portion of any such payments of interest accrued
as of the Purchase Date) discounted to the Purchase Date on a semi-annual basis
(assuming a 360-day year consisting of twelve 30-day months) at 16% per annum
plus (y) interest thereon, if any, accrued as of the Purchase Date (provided,
however, that installments of interest whose Stated Maturity is on or prior to
the Purchase Date shall be payable to the Holders of such Securities, or one or
more Predecessor Securities, registered as such at the close of business on the
relevant Record Dates according to their terms and the provisions of the
Indenture).

     In the event of redemption or purchase pursuant to an Offer to Purchase of
this Security in part only, a new Security or Securities for the unredeemed or
unpurchased portion hereof will be issued in the name of the Holder hereof upon
the cancellation hereof.

     The indebtedness evidenced by this Security is, to the extent provided in
the Indenture, subordinate and subject in right of payment to the prior payment
in full of all Senior Indebtedness, and this Security is issued subject to the
provisions of the Indenture with respect thereto. Each Holder of this Security,
by accepting the same, (a) agrees to and shall be bound by such provisions, (b)
authorizes and directs the Trustee on his behalf to take such action as may be
necessary or appropriate to effectuate the subordination so provided and (c)
appoints the Trustee his attorney-in-fact for any and all such purposes.

                                       17

<PAGE>   28

     If an Event of Default shall occur and be continuing, the principal of all
the Securities may be declared due and payable in the manner and with the effect
provided in the Indenture.

     The Indenture contains provisions for defeasance at any time of (i) the
entire indebtedness of this Security or (ii) certain restrictive covenants and
Events of Default with respect to this Security, in each case upon compliance
with certain conditions set forth therein.

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the consent of the Holders of a
majority in aggregate principal amount of the Securities at the time
Outstanding. The Indenture also contains provisions permitting the Holders of
specified percentages in aggregate principal amount of the Securities at the
time Outstanding, on behalf of the Holders of all the Securities, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and their consequences. Any such consent or
waiver by the Holder of this Security shall be conclusive and binding upon such
Holder and upon all future Holders of this Security and of any Security issued
upon the registration of transfer hereof or in exchange herefor or in lieu
hereof, whether or not notation of such consent or waiver is made upon this
Security.

     No reference herein to the Indenture and no provision of this Security or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and interest on this
Security at the times, place and rate, and in the coin or currency, herein
prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this Security is registrable in the Security Register,
upon surrender of this Security for registration of transfer at the office or
agency of the Company in any place where the principal of and interest on this
Security are payable, duly endorsed by, or accompanied by a written instrument
of transfer in form satisfactory to the Company and the Security Registrar duly
executed by, the Holder hereof or his attorney duly authorized in writing, and
thereupon one or more new Securities, of authorized denominations and for the
same aggregate principal amount, will be issued to the designated transferee or
transferees.

     The Securities are issuable only in registered form without coupons in
denominations of $1.00 and any integral multiple thereof. As provided in the
Indenture and subject to certain limitations therein set forth, Securities are
exchangeable for a like aggregate principal amount of Securities of a different
authorized denomination, as requested by the Holder surrendering the same.

     No service charge shall be made for any such registration of transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

     Prior to due presentment of this Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

     Interest on this Security shall be computed on the basis of a 360-day year
of twelve 30-day months.

                                       18

<PAGE>   29

     All terms used in this Security which are defined in the Indenture shall
have the meanings assigned to them in the Indenture.

     The Indenture and this Security shall be governed by and construed in
accordance with the laws of the State of New York.

                                 ASSIGNMENT FORM

To assign this Security, fill in the form below:

I or we assign and transfer this Security to:

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
              (Print or type assignee's name, address and zip code)

________________________________________________________________________________
     (Print or type assignee's Social Security or other identifying number)

and irrevocably appoint ________________________________________________________

as agent to transfer this Security on the books of the Company. The agent may
substitute another to act for him or her.

Dated: _______________                  Signature: _____________________________
                                                   (Sign exactly as your name
                                                   appears on the face of this
                                                            Security)

                                        Signature
                                        Guarantee: _____________________________

     Note:  Signature must be guaranteed by an institution which is a member of
the following recognized signature guarantee programs: (i) the Securities
Transfer Agent Medallion Program, (ii) the New York Stock Exchange Medallion
Program, (iii) the Stock Exchange Medallion Program or (iv) another guarantee
program reasonably acceptable to the Trustee, if Securities are to be delivered
other than to and in the name of the registered owner.

                                       19

<PAGE>   30

SECTION 204.  Form of Trustee's Certificate of Authentication.

     This is one of the Securities referred to in the within-mentioned
Indenture.

WILMINGTON TRUST COMPANY
in its capacity as Trustee

By: ____________________________________
            Authorized Signatory

                                    ARTICLE 3

                                 The Securities

SECTION 301.  Title and Terms.

     The aggregate principal amount of Securities which may be authenticated and
delivered under this Indenture is limited to $64,507,987, except for Securities
authenticated and delivered upon registration of transfer of, or in exchange
for, or in lieu of, other Securities pursuant to Section 304, 305, 306, 906 or
1108 or in connection with an Offer to Purchase pursuant to Section 1401.

     The Securities shall be known and designated as the "6% Subordinated Notes
due April 15, 2010" of the Company. Their Stated Maturity shall be Apri1 15,
2010 and they shall bear interest (a) at the rate of 6% per annum on the
principal amount, from April 7, 2000 or from the most recent Interest Payment
Date to which interest has been paid or duly provided for, as the case may be,
payable semi-annually on April 15 and October 15, commencing October 15, 2000,
until the principal thereof is paid or made available for payment or, (b)(i) if
a Change of Control occurs during the Deferral Period, (ii) a Security has been
tendered and not withdrawn pursuant to an Offer to Purchase prior to the close
of business on the Offer Expiration Date, and (iii) the Company has not
purchased such Security pursuant to Section 1403 (a "Tendered Security"), at the
rate of 12% per annum on the Purchase Price of such Security from the day after
the Offer Expiration Date until the termination of the Deferral Period
("Deferral Period Interest"); provided that, for greater certainty, interest
payable after the termination of the Deferral Period shall be payable on the
full principal amount of the Securities.

     For interest payments, other than payments of Deferral Period Interest, due
on each Interest Payment Date occurring on or prior to April 15, 2005, the
Company may, at its option, in lieu of the payment in cash of the interest due
and payable on such Interest Payment Date, and in compliance with Section 303,
execute and deliver to the Trustee for authentication, additional Securities in
an aggregate principal amount equal to the amount of cash interest payable on
such Interest Payment Date, provided, that the Company shall not issue
additional Securities in any denomination of less than $1.00 and the principal
amount of additional Securities to be issued to any Holder in lieu of the
payment of cash interest shall be rounded down to the nearest $1.00; and the
Trustee, in accordance with the Company

                                       20

<PAGE>   31

Order provided in accordance with Section 303, shall authenticate and deliver to
the Holders of record on such Regular Record Date such additional Securities
requested in such Company Order (such duly executed and authenticated additional
Securities being of the same series as the Securities and referred to herein as
"Additional Securities"), and the due issuance of such Additional Securities
shall constitute full payment of such portion of interest; provided, however,
that the interest shall not so be payable in whole or part in Additional
Securities in lieu of cash from and after the date of any deposit of money
pursuant to Section 401 or the defeasance or covenant defeasance of the
Securities pursuant to Article Twelve. If the Company elects to make such
interest payment in cash, it shall give notice of such election to the Holders
and the Trustee not less than thirty days prior to such Interest Payment Date.
All Additional Securities shall be issued in the same series as the Securities
originally issued pursuant to the Indenture, and all Holders of Additional
Securities shall be treated as Holders of Securities for any and all purposes of
any Act of Holders or of other action of Holders or otherwise pursuant to this
Indenture except as may otherwise be required by law. Any such Additional
Securities shall be governed by the Indenture and the terms of each such
Additional Security shall be identical to the terms of these Securities except
with respect to, as the case may be, any necessary designation of such
Additional Security (which may (but need not) indicate the Interest Payment Date
of its original issuance), its CUSIP number or other required identifications,
any required legends (including with respect to taxation) and the date from
which interest accrues and except as may otherwise be required by law.
Notwithstanding the foregoing, Additional Securities may be issued on any given
Interest Payment Date in separate series if such is required pursuant to a
change in law after the date hereof, and, in such event, the Holders of
Additional Securities shall continue to be treated in all respects as Holders of
Securities for all purposes of this Indenture (including with respect to any Act
of Holders or any other action of Holders or otherwise pursuant to this
Indenture) except as required by such change in law.

     One half of the Deferral Period Interest payable on a Tendered Security
will accrue on the Purchase Pr ice of such Security and be paid in cash on the
Interest Payment Date to the Person in whose name such Security (or one or more
Predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest. The other half of the Deferral Period Interest
will accrue on the Purchase Price of such Security until the termination of the
Deferral Period but will only be paid in cash on the fifth Business Day after
the termination of the Deferral Period to the Person in whose name such Tendered
Security (or one or more Predecessor Securities) is registered ("Deferred
Interest") on the date of such termination. The Company's obligation to pay
Deferral Period Interest shall at all times be limited by and subject to the
provisions of Article 13.

     The principal of and interest on the Securities shall be payable at the
office or agency of the Company in the City of Wilmington, Delaware maintained
for such purpose or at any other office or agency maintained by the Company for
such purpose; provided, however, that at the option of the Company payment of
interest may be made by check mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

     The Securities shall be redeemable as provided in Article Eleven.

     The Securities shall be subject to defeasance at the option of the Company
as provided in Article Twelve.

     The Securities shall be subordinated in right of payment to Senior
Indebtedness of the Company as provided in Article Thirteen.

                                       21

<PAGE>   32

SECTION 302.  Denominations.

     The Securities shall be issuable only in registered form without coupons
and only in denominations of $1.00 and any integral multiple thereof.

SECTION 303.  Execution, Authentication, Delivery and Dating.

     The Securities shall be executed on behalf of the Company by its Chairman
of the Board, its President or one of its Vice Presidents, under a facsimile of
its corporate seal reproduced thereon attested by its Secretary. The signature
of any of these officers on the Securities may be manual or facsimile.

     Securities bearing the manual or facsimile signatures of individuals who
were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

     At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities and an Opinion of Counsel in form and substance
satisfactory to the Trustee, to the effect that (1) this Indenture has been
qualified under the Trust Indenture Act, (2) all legally required proceedings by
the Company in connection with the authorization and issuance of the Securities
have been duly taken and all orders, consents or other authorizations or
approvals legally required for the validity of the Securities have been
obtained, and (3) the Securities have been duly authorized and executed and when
authenticated in accordance with the terms of this Indenture will be legal,
valid and binding obligations of the Company enforceable in accordance with
their terms (subject to normal bankruptcy exceptions) and entitled to the
benefits of this Indenture; and the Trustee in accordance with such Company
Order shall authenticate and deliver such Securities as in this Indenture
provided and not otherwise.

     Pursuant to the third paragraph of Section 301, the Company may deliver
Additional Securities executed by the Company to the Trustee for authentication,
together with a Company Order for the authentication and delivery of such
Additional Securities and an Opinion of Counsel in form and substance
satisfactory to the Trustee, to the effect that (1) this Indenture has been
qualified under the Trust Indenture Act, (2) all legally required proceedings by
the Company in connection with the authorization and issuance of the Securities
have been duly taken and all orders, consents or other authorizations or
approvals legally required for the validity of the Securities have been
obtained, and (3) the Securities have been duly authorized and executed and when
authenticated in accordance with the terms of this Indenture will be legal,
valid and binding obligations of the Company enforceable in accordance with
their terms (subject to normal bankruptcy exceptions) and entitled to the
benefits of this Indenture, and, subject to Section 301 and compliance with this
Section 303, the Trustee in accordance with the Company Order shall authenticate
and deliver such Securities. Each such Company Order shall be accompanied by an
Officers' Certificate stating in substance that the issuance of the Additional
Securities to be issued on the relevant Interest Payment Date will not conflict
with, result in a breach or violation of or constitute a default under the terms
of any agreement or instrument binding on the Company and its Subsidiaries.

                                       22

<PAGE>   33

     Each Security shall be dated the date of its authentication.

     No Security shall be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder.

     In case the Company, pursuant to Article Eight, shall be consolidated or
merged with or into any other Person or shall convey, transfer, lease or
otherwise dispose of substantially all of its properties and assets to any
Person, and the successor Person resulting from such consolidation, or surviving
such merger, or into which the Company shall have been merged, or the successor
Person which shall have received a conveyance, transfer, lease or other
disposition as aforesaid, shall have executed an indenture supplemental hereto
with the Trustee pursuant to Article Eight, any of the Securities authenticated
or delivered prior to such consolidation, merger, conveyance, transfer, lease or
other disposition may, from time to time, at the request of the successor
Person, be exchanged for other Securities executed in the name of the successor
Person with such changes in phraseology and form as may be appropriate, but
otherwise in substance of like tenor as the Securities surrendered for such
exchange and of like principal amount; and the Trustee upon Company Order of the
successor Person, shall authenticate and deliver replacement Securities as
specified in such request for the purpose of such exchange. If replacement
Securities shall at any time be authenticated and delivered in any new name of a
successor Person pursuant to this Section in exchange or substitution for or
upon registration of transfer of any Securities, such successor Person, at the
option of any Holder but without expense to such Holder, shall provide for the
exchange of all Securities at the time outstanding held by such Holder for
Securities authenticated and delivered in such new name.

SECTION 304.  Temporary Securities.

     Pending the preparation of definitive Securities, the Company may execute,
and upon Company Order the Trustee shall authenticate and deliver, temporary
Securities which are printed, lithographed, typewritten, mimeographed or
otherwise produced, in any authorized denomination, substantially of the tenor
of the definitive Securities in lieu of which they are issued and with such
appropriate insertions, omissions, substitutions and other variations as the
officers executing such Securities may determine, as evidenced by their
execution of such Securities.

     If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay. After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at any office
or agency of the Company designated pursuant to Section 1002, without charge to
the Holder. Upon surrender for cancellation of any one or more temporary
Securities the Company shall execute and the Trustee shall authenticate and
deliver in exchange therefor a like principal amount of definitive Securities of
authorized denominations. Until so exchanged the temporary Securities shall in
all respects be entitled to the same benefits under this Indenture as definitive
Securities.

                                       23

<PAGE>   34

SECTION 305.  Registration, Registration of Transfer and Exchange.

     (a) Registration, Registration of Transfer and Exchange Generally. The
Company shall cause to be kept at the Corporate Trust Office of the Trustee a
register (the register maintained in such office and in any other office or
agency designated pursuant to Section 1002 being herein sometimes collectively
referred to as the "Security Register") in which, subject to such reasonable
regulations as it may prescribe, the Company shall provide for the registration
of Securities and of transfers and exchanges of Securities. The Trustee is
hereby appointed "Security Registrar" for the purpose of registering Securities
and transfers and exchanges of Securities as herein provided.

     Upon surrender for registration of transfer of any Security at an office or
agency of the Company designated pursuant to Section 1002 for such purpose, the
Company shall execute, and the Trustee shall authenticate and deliver, in the
name of the designated transferee or transferees, one or more new Securities of
any authorized denominations and of a like aggregate principal amount.

     At the option of the Holder, and subject to the other provisions of this
Section 305, Securities may be exchanged for other Securities of any authorized
denominations and of a like aggregate principal amount, upon surrender of the
Securities to be exchanged at such office or agency. Whenever any Securities are
so surrendered for exchange, and subject to the other provisions of this Section
305, the Company shall execute, and the Trustee shall authenticate and deliver,
the Securities which the Holder making the exchange is entitled to receive.

     All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

     Every Security presented or surrendered for registration of transfer or for
exchange shall (if so required by the Company or the Security Registrar) be duly
endorsed, or be accompanied by a written instrument of transfer in form
satisfactory to the Company and the Security Registrar duly executed, by the
Holder thereof or his attorney duly authorized in writing.

     No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906 or 1108.

     The Company shall not be required (i) to issue, register the transfer of or
exchange any Security during a period beginning at the opening of business 15
days before the day of the mailing of a notice of redemption of Securities
selected for redemption under Section 1104 and ending at the close of business
on the day of such mailing, or (ii) to register the transfer of or exchange any
Security so selected for redemption in whole or in part, except the unredeemed
portion of any Security being redeemed in part.

                                       24

<PAGE>   35

SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.

     If any mutilated Security is surrendered to the Trustee, the Company shall
execute and the Trustee shall authenticate and deliver in exchange therefor a
new Security of like tenor and principal amount and bearing a number not
contemporaneously outstanding.

     If there shall be delivered to the Company and the Trustee (i) evidence to
their satisfaction of the mutilation, destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and upon its request the Trustee shall
authenticate and deliver, in lieu of any such destroyed, lost or stolen
Security, a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

     In case any such mutilated, destroyed, lost or stolen Security has become
or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, pay such Security.

     Upon the issuance of any new Security under this Section, the Company may
require the payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in relation thereto and any other expenses (including
the fees and expenses of the Trustee) connected therewith.

     Every new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately with
any and all other Securities duly issued hereunder.

     The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities.

SECTION 307.  Payment of Interest; Interest Rights Preserved.

     Subject to the provisions of Article 13 hereof, interest, other than
Deferred Interest, on any Security which is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in
whose name that Security (or one or more Predecessor Securities) is registered
at the close of business on the Regular Record Date for such interest. Deferred
Interest on any Security which is payable, and is punctually paid or duly
provided for, shall be paid on the fifth Business Day after the termination of
the Deferral Period to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on the date of
such termination.

     Any interest, other than Deferral Period Interest, on any Security which is
payable, but is not punctually paid or duly provided for, on any Interest
Payment Date (herein called "Defaulted Interest") shall forthwith cease to be
payable to the Holder on the relevant Regular Record Date by virtue

                                       25

<PAGE>   36

of having been such Holder, and such Defaulted Interest may be paid by the
Company, at its election in each case, as provided in clause (1) or (2) below:

          (1) The Company may elect to make payment of any Defaulted Interest to
     the Persons in whose names the Securities (or their respective Predecessor
     Securities) are registered at the close of business on a Special Record
     Date for the payment of such Defaulted Interest, which shall be fixed in
     the following manner. The Company shall notify the Trustee in writing of
     the amount of Defaulted Interest proposed to be paid on each Security and
     the date of the proposed payment, and at the same time the Company shall
     deposit with the Trustee an amount of money equal to the aggregate amount
     proposed to be paid in respect of such Defaulted Interest or shall make
     arrangements satisfactory to the Trustee for such deposit prior to the date
     of the proposed payment, such money when deposited to be held in trust for
     the benefit of the Persons entitled to such Defaulted Interest as in this
     clause provided. Thereupon the Trustee shall fix a Special Record Date for
     the payment of such Defaulted Interest which shall be not more than 15 days
     and not less than 10 days prior to the date of the proposed payment and not
     less than 10 days after the receipt by the Trustee of the notice of the
     proposed payment. The Trustee shall promptly notify the Company of such
     Special Record Date and, in the name and at the expense of the Company,
     shall cause notice of the proposed payment of such Defaulted Interest and
     the Special Record Date therefor to be mailed, first-class postage prepaid,
     to each Holder at his address as it appears in the Security Register, not
     less than 10 days prior to such Special Record Date. Notice of the proposed
     payment of such Defaulted Interest and the Special Record Date therefor
     having been so mailed, such Defaulted Interest shall be paid to the Persons
     in whose names the Securities (or their respective Predecessor Securities)
     are registered at the close of business on such Special Record Date and
     shall no longer be payable pursuant to the following clause (2).

          (2) The Company may make payment of any Defaulted Interest in any
     other lawful manner not inconsistent with the requirements of any
     securities exchange on which the Securities may be listed, and upon such
     notice as may be required by such exchange, if, after notice given by the
     Company to the Trustee of the proposed payment pursuant to this clause,
     such manner of payment shall be deemed practicable by the Trustee.

     Subject to the foregoing provisions of this Section, each Security
delivered under this Indenture upon registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest accrued
and unpaid, and to accrue, which were carried by such other Security.

SECTION 308.  Persons Deemed Owners.

     Prior to due presentment of a Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name such Security is registered as the owner of such Security
for the purpose of receiving payment of principal of and (subject to Section
306) interest on such Security and for all other purposes whatsoever, whether or
not such Security be overdue, and neither the Company, the Trustee nor any agent
of the Company or the Trustee shall be affected by notice to the contrary.

                                       26

<PAGE>   37

SECTION 309.  Cancellation.

     All Securities surrendered for payment, redemption, registration of
transfer or exchange shall, if surrendered to any Person other than the Trustee,
be delivered to the Trustee and shall be promptly cancelled by it. The Company
shall deliver to the Trustee for cancellation any Securities previously
authenticated and delivered hereunder which the Company may have acquired in any
manner whatsoever, and all Securities so delivered shall be promptly cancelled
by the Trustee. No Securities shall be authenticated in lieu of or in exchange
for any Securities cancelled as provided in this Section, except as expressly
permitted by this Indenture. All cancelled Securities held by the Trustee shall
be disposed of by the Trustee in accordance with its customary procedures and
certification of their disposal delivered to the Company unless by Company Order
the Company shall direct that cancelled Securities be returned to it.

SECTION 310.  Computation of Interest.

     Interest on the Securities shall be computed on the basis of a 360-day year
of twelve 30-day months.

                                    ARTICLE 4

                           Satisfaction and Discharge

SECTION 401.  Satisfaction and Discharge of Indenture.

     This Indenture shall cease to be of further effect (except as to any
surviving rights of registration of transfer or exchange of Securities herein
expressly provided for), and the Trustee, upon a Company Order and at the
expense of the Company, shall execute proper instruments acknowledging
satisfaction and discharge of this Indenture (including, but not limited to,
Article Twelve hereof), when

     (1) either

          (A) all Securities theretofore authenticated and delivered (other than
     (i) Securities which have been destroyed, lost or stolen and which have
     been replaced or paid as provided in Section 306 and (ii) Securities for
     whose payment money has theretofore been deposited in trust or segregated
     and held in trust by the Company and thereafter repaid to the Company or
     discharged from such trust, as provided in Section 1003) have been
     delivered to the Trustee for cancellation; or

          (B) all such Securities not theretofore delivered to the Trustee for
     cancellation

               (i) have become due and payable, or

               (ii) will become due and payable at their Stated Maturity within
          one year, or

                                       27

<PAGE>   38

               (iii) are to be called for redemption within one year under
          arrangements satisfactory to the Trustee for the giving of notice of
          redemption by the Trustee in the name, and at the expense, of the
          Company,

     and the Company, in the case of (i), (ii) or (iii) above, has deposited or
     caused to be deposited with the Trustee as trust funds in trust for the
     purpose an amount sufficient to pay and discharge the entire indebtedness
     on such Securities not theretofore delivered to the Trustee for
     cancellation, for principal and interest to the date of such deposit (in
     the case of Securities which have become due and payable) or to the Stated
     Maturity or Redemption Date, as the case may be;

          (2) the Company has paid or caused to be paid all other sums payable
     hereunder by the Company; and

          (3) the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, each stating that all conditions precedent
     herein provided for relating to the satisfaction and discharge of this
     Indenture have been complied with.

     Notwithstanding the satisfaction and discharge of this Indenture pursuant
to this Article Four, the obligations of the Company to the Trustee under
Section 607 and, if money shall have been deposited with the Trustee pursuant to
subclause (B) of clause (1) of this Section, the obligations of the Trustee
under Section 402 and the last paragraph of Section 1003 shall survive.

SECTION 402.  Application of Trust Money.

     Subject to the provisions of the last paragraph of Section 1003, all money
deposited with the Trustee pursuant to Section 401 shall be held in trust and
applied by it, in accordance with the provisions of the Securities and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal and interest for
whose payment such money has been deposited with the Trustee.

     All moneys held pursuant to this Article shall not be subject to the claims
of the holders of Senior Indebtedness under Article Thirteen.

                                    ARTICLE 5

                                    Remedies

SECTION 501.  Events of Default.

     "Event of Default", wherever used herein, means (subject to Section 1302)
any one of the following events (whatever the reason for such Event of Default
and whether it shall be voluntary or involuntary or be effected by operation of
law or pursuant to any judgment, decree or order of any court or any order, rule
or regulation of any administrative or governmental body):

                                       28

<PAGE>   39

          (1) default in the payment of the principal of any Security at its
     Maturity; or

          (2) default in the payment of any interest upon any Security when it
     becomes due and payable, and continuance of such default for a period of 30
     days; or

          (3) default in the payment of principal and interest on Securities
     required to be purchased pursuant to an Offer to Purchase as described
     under Section 1401 when due and payable; or

          (4) default in the performance, or breach, of Section 801; or

          (5) default in the performance, or breach, of any covenant of the
     Company in this Indenture (other than a covenant a default in whose
     performance or whose breach is elsewhere in this Section specifically dealt
     with), and continuance of such default or breach for a period of 30 days
     after there has been given, by registered or certified mail, to the Company
     by the Trustee or to the Company and the Trustee by the Holders of at least
     25% in principal amount of the Outstanding Securities a written notice
     specifying such default or breach and requiring it to be remedied and
     stating that such notice is a "Notice of Default" hereunder; or

          (6) a default under the terms of the Convertible Subordinated Notes,
     which default results in the acceleration of the payment of all or any
     portion of such indebtedness; or

          (7) a default under the terms of any instrument evidencing or securing
     indebtedness for money borrowed by the Company or any Significant
     Subsidiary having an outstanding principal amount of $50 million, which
     default results in the acceleration of the payment of all or any portion of
     such indebtedness; or

          (8) a final judgment or final judgments for the payment of money are
     entered against the Company or any Significant Subsidiary in an aggregate
     amount of $35 million or more in excess of the amount covered by insurance,
     by a court or courts of competent jurisdiction, which judgments become
     liens and remain undischarged or unbonded for a period (during which
     execution shall not be effectively stayed) of 60 days after the right to
     appeal all such judgments have expired; or

          (9) the entry by a court having jurisdiction in the premises of (A) a
     decree or order for relief in respect of the Company or any Significant
     Subsidiary in an involuntary case or proceeding under any applicable U.S.
     Federal or State, Canadian Federal or Provincial or other applicable
     bankruptcy, insolvency, reorganization or other similar law or (B) a decree
     or order adjudging the Company or any Significant Subsidiary a bankrupt or
     insolvent, or approving as properly filed a petition seeking
     reorganization, arrangement, adjustment or composition of or in respect of
     the Company or any Significant Subsidiary under any applicable U.S. Federal
     or State, Canadian Federal or Provincial or other applicable law, or
     appointing a custodian, receiver, liquidator, assignee, trustee,
     sequestrator or other similar official of the Company or any Significant
     Subsidiary or of any substantial part of the property of the Company or any
     Significant Subsidiary, or ordering the winding up or liquidation of the
     affairs of the Company or any Significant Subsidiary, and the continuance
     of any such decree or order for relief or any such other decree or order
     unstayed and in effect for a period of 90 consecutive days; or

                                       29

<PAGE>   40

          (10) the commencement by the Company or any Significant Subsidiary of
     a voluntary case or proceeding under any applicable U.S. Federal or State,
     Canadian Federal or Provincial or other applicable bankruptcy, insolvency,
     reorganization or other similar law or of any other case or proceeding to
     be adjudicated a bankrupt or insolvent, or the consent by the Company or
     any Significant Subsidiary to the entry of a decree or order for relief in
     respect of the Company or any Significant Subsidiary in an involuntary case
     or proceeding under any applicable U.S. Federal or State, Canadian Federal
     or Provincial or other applicable bankruptcy, insolvency, reorganization or
     other similar law or to the commencement of any bankruptcy or insolvency
     case or proceeding against the Company or any Significant Subsidiary, or
     the filing by the Company or any Significant Subsidiary of a petition or
     answer or consent seeking reorganization or relief under any applicable
     U.S. Federal or State, Canadian Federal or Provincial or other applicable
     law, or the consent by the Company or any Significant Subsidiary to the
     filing of such petition or to the appointment of or taking possession by a
     custodian, receiver, liquidator, assignee, trustee, sequestrator or similar
     official of the Company or any Significant Subsidiary or of any substantial
     part of the property of the Company or any Significant Subsidiary, or the
     making by the Company or any Significant Subsidiary of an assignment for
     the benefit of creditors, or the admission by the Company or any
     Significant Subsidiary in writing of its inability to pay its debts
     generally as they become due, or the taking of corporate action by the
     Company or any Significant Subsidiary in furtherance of any such action.

SECTION 502.  Acceleration of Maturity; Rescission and Annulment.

     If an Event of Default (other than an Event of Default specified in Section
501(9) or (10)) occurs and is continuing, then and in every such case the
Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities may declare the principal of all the Securities to be due
and payable (i) with respect to an Event of Default other than an Event of
Default specified in Section 501(2) with respect to Deferral Period Interest,
immediately, and (ii) with respect to an Event of Default specified in Section
501(2) with respect to Deferral Period Interest, upon termination of the
Deferral Period, in each case by a notice in writing to the Company (and to the
Trustee if given by Holders), and upon any such declaration such principal and
any accrued interest shall become immediately due and payable; provided,
however, that so long as the Credit Agreement or Exit Facility shall be in full
force and effect, if an Event of Default shall have occurred and be continuing
(other than an Event of Default specified in Section 501(9) or (10)), the
Securities shall not become due and payable until the earlier to occur of (x)
twenty days following delivery of written notice of such acceleration of the
Securities to the agent under each of the Credit Agreement and the Exit
Facility, as applicable, or (y) the acceleration (ipso facto or otherwise) of
any indebtedness under the Credit Agreement or the Exit Facility.

     If an Event of Default specified in Section 501(9) or (10) occurs, the
principal of and any accrued interest on the Securities then Outstanding shall
ipso facto become immediately due and payable without any declaration or other
Act on the part of the Trustee or any Holder.

     At any time after such a declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter in this Article provided, the Holders of a majority
in principal amount of the Outstanding Securities, by written notice to the
Company and the Trustee, may rescind and annul such declaration and its
consequences if

          (1) the Company has paid or deposited with the Trustee a sum
     sufficient to pay

                                       30

<PAGE>   41

               (A) All overdue interest on all Outstanding Securities,

               (B) the principal of any Outstanding Securities which have become
          due otherwise than by such declaration of acceleration and, to the
          extent that payment of such interest is lawful, interest thereon at
          the rate provided by the Outstanding Securities,

               (C) to the extent that payment of such interest is lawful,
          interest upon overdue interest at the rate provided by the Securities,
          and

               (D) all sums paid or advanced by the Trustee hereunder and the
          reasonable compensation, expenses, disbursements and advances of the
          Trustee, its agents and counsel;

          and

          (2) all Events of Default, other than the non-payment of the principal
     of Securities which have become due solely by such declaration of
     acceleration, have been cured or waived as provided in Section 513.

     No such rescission shall affect any subsequent default or impair any right
consequent thereon.

SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee.

     The Company covenants that if

          (1) default is made in the payment of any interest on any Security
     when such interest becomes due and payable and such default continues for a
     period of 30 days, or

          (2) default is made in the payment of the principal of any Security at
     the Maturity thereof, the Company will, upon demand of the Trustee, pay to
     it, for the benefit of the Holders of such Securities, the whole amount
     then due and payable on such Securities for principal and interest, and, to
     the extent that payment of such interest shall be legally enforceable,
     interest on any overdue principal and on any overdue interest, at the rate
     provided by the Securities, and, in addition thereto, such further amount
     as shall be sufficient to cover the costs and expenses of collection,
     including the reasonable compensation, expenses, disbursements and advances
     of the Trustee, its agents and counsel.

     If the Company fails to pay such amounts forthwith upon such demand, the
Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon the Securities and collect the
moneys adjudged or decreed to be payable in the manner provided by law out of
the property of the Company or any other obligor upon the Securities, wherever
situated.

     If an Event of Default occurs and is continuing, the Trustee may in its
discretion proceed to protect and enforce its rights and the rights of the
Holders by such appropriate judicial proceedings as

                                       31

<PAGE>   42

the Trustee shall deem most effectual to protect and enforce any such rights,
whether for the specific enforcement of any covenant or agreement in this
Indenture or in aid of the exercise of any power granted herein, or to enforce
any other proper remedy.

SECTION 504.  Trustee May File Proofs of Claim.

     In case of any judicial proceeding relative to the Company (or any other
obligor upon the Securities), its property or its creditors, the Trustee shall
be entitled and empowered, by intervention in such proceeding or otherwise, to
take any and all actions authorized under the Trust Indenture Act in order to
have claims of the Holders and the Trustee allowed in any such proceeding and to
participate as a member, voting or otherwise, of any official committee of
creditors appointed in such matter. In particular, the Trustee shall be
authorized to collect and receive any moneys or other property payable or
deliverable on any such claims and to distribute the same; and any custodian,
receiver, assignee, trustee, liquidator, sequestrator or other similar official
in any such judicial proceeding is hereby authorized by each Holder to make such
payments to the Trustee and, in the event that the Trustee shall consent to the
making of such payments directly to the Holders, to pay to the Trustee any
amount due it for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 607.

     No provision of this Indenture shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding.

SECTION 505.  Trustee May Enforce Claims Without Possession of Securities.

     All rights of action and claims under this Indenture or the Securities may
be prosecuted and enforced by the Trustee without the possession of any of the
Securities or the production thereof in any proceeding relating thereto, and any
such proceeding instituted by the Trustee shall be brought in its own name as
trustee of an express trust, and any recovery of judgment shall, after provision
for the payment of the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, be for the ratable benefit of
the Holders of the Securities in respect of which such judgment has been
recovered.

SECTION 506.  Application of Money Collected.

     Any money collected by the Trustee pursuant to this Article shall be
applied in the following order, at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or interest,
upon presentation of the Securities and the notation thereon of the payment if
only partially paid and upon surrender thereof if fully paid:

          FIRST: To the payment of all amounts due the Trustee under Section
     607;

          SECOND: To the extend provided in Article Thirteen, to the holders of
     Senior Indebtedness in accordance with Article Thirteen; and

                                       32

<PAGE>   43

          THIRD: To the payment of the amounts then due and unpaid for principal
     of and interest on the Securities in respect of which or for the benefit of
     which such money has been collected, ratably, without preference or
     priority of any kind, according to the amounts due and payable on such
     Securities for principal and interest, respectively.

SECTION 507.  Limitation on Suits.

     No Holder of any Security shall have any right to institute any proceeding,
judicial or otherwise, with respect to this Indenture, or for the appointment of
a receiver or trustee, or for any other remedy hereunder, unless

          (1) such Holder has previously given written notice to the Trustee of
     a continuing Event of Default;

          (2) the Holders of not less than 25% in principal amount of the
     Outstanding Securities shall have made written request to the Trustee to
     institute proceedings in respect of such Event of Default in its own name
     as Trustee hereunder;

          (3) such Holder or Holders have offered to the Trustee reasonable
     indemnity against the costs, expenses and liabilities to be incurred in
     compliance with such request;

          (4) the Trustee for 60 days after its receipt of such notice, request
     and offer of indemnity has failed to institute any such proceeding; and

          (5) no direction inconsistent with such written request has been given
     to the Trustee during such 60-day period by the Holders of a majority in
     principal amount of the Outstanding Securities;

it being understood and intended that no one or more Holders shall have any
right in any manner whatever by virtue of, or by availing of, any provision of
this Indenture to affect, disturb or prejudice the rights of any other Holders,
or to obtain or to seek to obtain priority or preference over any other Holders
or to enforce any right under this Indenture, except in the manner herein
provided and for the equal and ratable benefit of all the Holders.

     Notwithstanding anything contained herein to the contrary, at any time when
the Company is prohibited from making any payment of principal of or interest on
the Securities as described in Article 13, neither the Trustee nor the Holders
may (A) accelerate the maturity of the principal of or accrued interest on the
Securities (unless, with respect to this clause (A) only, the payment of the
aggregate indebtedness under the Credit Agreement or the Exit Facility shall
have been accelerated), (B) commence any action or proceeding (including the
right to set off) to collect payment of the principal of or accrued interest on
the Securities, or (C) commence an involuntary case or proceeding in bankruptcy
against the Company or seek the appointment of a receiver, custodian or trustee
with respect to the assets of the Company; provided that the restrictions set
forth in the foregoing clauses (A), (B), and (C) shall not apply upon the
commencing of any bankruptcy, dissolution, winding up, liquidation or
reorganization of the Company by any Persons other than the Trustee or the
Holders.

                                       33

<PAGE>   44

SECTION 508.  Unconditional Right of Holders to Receive Principal and Interest.

     Subject to Article 13 hereof and the last paragraph of Section 507 hereof,
but notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and (subject to Section 307) interest on such
Security on the respective Stated Maturities expressed in such Security (or, in
the case of redemption, on the Redemption Date) and to institute suit for the
enforcement of any such payment, and such rights shall not be impaired without
the consent of such Holder.

SECTION 509.  Restoration of Rights and Remedies.

     If the Trustee or any Holder has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding has been discontinued
or abandoned for any reason, or has been determined adversely to the Trustee or
to such Holder, then and in every such case, subject to any determination in
such proceeding, the Company, the Trustee and the Holders shall be restored
severally and respectively to their former positions hereunder and thereafter
all rights and remedies of the Trustee and the Holders shall continue as though
no such proceeding had been instituted.

SECTION 510.  Rights and Remedies Cumulative.

     Except as otherwise provided with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Securities in the last paragraph of Section
306, no right or remedy herein conferred upon or reserved to the Trustee or to
the Holders is intended to be exclusive of any other right or remedy, and every
right and remedy shall, to the extent permitted by law, be cumulative and in
addition to every other right and remedy given hereunder or now or hereafter
existing at law or in equity or otherwise. The assertion or employment of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

SECTION 511.  Delay or Omission Not Waiver.

     No delay or omission of the Trustee or of any Holder of any Security to
exercise any right or remedy accruing upon any Event of Default shall impair any
such right or remedy or constitute a waiver of any such Event of Default or an
acquiescence therein. Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised from time to time, and as often
as may be deemed expedient, by the Trustee or by the Holders, as the case may
be.

SECTION 512.  Control by Holders.

     The Holders of a majority in principal amount of the Outstanding Securities
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or exercising any trust or
power conferred on the Trustee, provided that

          (1) such direction shall not be in conflict with any rule of law or
     with this Indenture, and

          (2) the Trustee may take any other action deemed proper by the Trustee
     which is not inconsistent with such direction.

                                       34

<PAGE>   45

SECTION 513.  Waiver of Past Defaults.

     The Holders of not less than a majority in principal amount of the
Outstanding Securities may on behalf of the Holders of all the Securities waive
any past default hereunder and its consequences, except a default

          (1) in the payment of the principal of or interest on any Security
     (including any Security which is required to have been purchased pursuant
     to an Offer to Purchase which has been made by the Company), or

          (2) in respect of a covenant or provision hereof which under Article
     Nine cannot be modified or amended without the consent of the Holder of
     each Outstanding Security affected.

     Upon any such waiver, such default shall cease to exist and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other
default or impair any right consequent thereon.

SECTION 514.  Undertaking for Costs.

     In any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; provided, that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company or the Trustee.

SECTION 515.  Waiver of Stay or Extension Laws.

     The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, or plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay or extension law wherever enacted,
now or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                    ARTICLE 6

                                  The Trustee

SECTION 601.  Certain Duties and Responsibilities.

          (a) If an Event of Default has occurred and is continuing, the Trustee
     shall exercise such of the rights and powers vested in it by this
     Indenture, and use the same degree of care and skill in its exercise, as a
     prudent person would exercise or use under the circumstances in the conduct
     of such person's own affairs.

                                       35

<PAGE>   46

          (b) Except during the continuance of an Event of Default:

               (i) the duties of the Trustee shall be determined solely by the
          express provisions of this Indenture and the Trustee need perform only
          those duties that are specifically set forth in this Indenture and no
          others, and no implied covenants or obligations shall be read into
          this Indenture against the Trustee; and

               (ii) in the absence of bad faith on its part, the Trustee may
          conclusively rely, as to the truth of the statements and the
          correctness of the opinions expressed therein, upon certificates or
          opinions furnished to the Trustee and conforming to the requirements
          of this Indenture. However, the Trustee shall examine the certificates
          and opinions to determine whether or not they conform to the
          requirements of this Indenture (but need not confirm or investigate
          the accuracy of mathematical calculations or other facts stated
          therein or otherwise verify the contents thereof).

          (c) The Trustee may not be relieved from liabilities for its own
     negligent action, its own negligent failure to act, or its own willful
     misconduct, except that:

               (i) this paragraph does not limit the effect of paragraph (b) of
          this Section 601;

               (ii) the Trustee shall not be liable for any error of judgment
          made in good faith by a Responsible Officer, unless it is proved that
          the Trustee was negligent in ascertaining the pertinent facts; and

               (iii) the Trustee shall not be liable with respect to any action
          it takes or omits to take in good faith in accordance with a direction
          received by it pursuant to Section 512 hereof.

          (d) Whether or not therein expressly so provided, every provision of
     this Indenture that in any way relates to the Trustee is subject to
     paragraphs (a), (b), and (c) of this Section 601.

          (e) No provision of this Indenture shall require the Trustee to expend
     or risk its own funds or incur any liability. The Trustee shall be under no
     obligation to exercise any of its rights and powers under this Indenture at
     the request of any Holder, unless such Holder shall have offered to the
     Trustee security and indemnity satisfactory to it against any loss,
     liability or expense including reasonable attorneys' fees that might be
     incurred by it in compliance with such request or direction.

          (f) The Trustee shall not be liable for interest on any money received
     by it except as the Trustee may agree in writing with the Company. Money
     held in trust by the Trustee need not be segregated from other funds except
     to the extent required by law.

SECTION 602.  Notice of Defaults.

     The Trustee shall give the Holders notice of any default hereunder as and
to the extent provided by the Trust Indenture Act; provided, however, that in
the case of any default of the character

                                       36

<PAGE>   47

specified in Section 501(4), no such notice to Holders shall be given until at
least 30 days after the occurrence thereof. For the purpose of this Section, the
term "default" means any event which is, or after notice or lapse of time or
both would become, an Event of Default.

SECTION 603.  Certain Rights of Trustee.

          Subject to the provisions of Section 601:

          (a) the Trustee may rely and shall be protected in acting or
     refraining from acting upon any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document believed by it to be genuine and to have been signed or presented
     by the proper party or parties;

          (b) any request or direction of the Company mentioned herein shall be
     sufficiently evidenced by a Company Request or Company Order and any
     resolution of the Board of Directors may be sufficiently evidenced by a
     Board Resolution;

          (c) whenever in the administration of this Indenture the Trustee shall
     deem it desirable that a matter be proved or established prior to taking,
     suffering or omitting any action hereunder, the Trustee (unless other
     evidence be herein specifically prescribed) may, in the absence of bad
     faith on its part, rely upon an Officers' Certificate;

          (d) the Trustee may consult with counsel and the written advice of
     such counsel or any Opinion of Counsel shall be full and complete
     authorization and protection in respect of any action taken, suffered or
     omitted by it hereunder in good faith and in reliance thereon;

          (e) the Trustee shall be under no obligation to exercise any of the
     rights or powers vested in it by this Indenture at the request or direction
     of any of the Holders pursuant to this Indenture, unless such Holders shall
     have offered to the Trustee reasonable security or indemnity against the
     costs, expenses and liabilities which might be incurred by it in compliance
     with such request or direction;

          (f) the Trustee shall not be bound to make any investigation into the
     facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document, but the Trustee, in its discretion, may make such further inquiry
     or investigation into such facts or matters as it may see fit, and, if the
     Trustee shall determine to make such further inquiry or investigation, it
     shall be entitled to examine the books, records and premises of the
     Company, personally or by agent or attorney; and

          (g) the Trustee may execute any of the trusts or powers hereunder or
     perform any duties hereunder either directly or by or through agents or
     attorneys and the Trustee shall not be responsible for any misconduct or
     negligence on the part of any agent or attorney appointed with due care by
     it hereunder.

                                       37

<PAGE>   48

SECTION 604.  Not Responsible for Recitals or Issuance of Securities.

     The recitals contained herein and in the Securities, except the Trustee's
certificates of authentication, shall be taken as the statements of the Company,
and the Trustee assumes no responsibility for their correctness. The Trustee
makes no representations as to the validity or sufficiency of this Indenture or
of the Securities. The Trustee shall not be accountable for the use or
application by the Company of Securities or the proceeds thereof.

SECTION 605.  May Hold Securities.

     The Trustee, any Authenticating Agent, any Paying Agent, any Security
Registrar or any other agent of the Company, in its individual or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
608 and 613, may otherwise deal with the Company with the same rights it would
have if it were not Trustee, Authenticating Agent, Paying Agent, Security
Registrar or such other agent.

SECTION 606.  Money Held in Trust.

     Money held by the Trustee in trust hereunder need not be segregated from
other funds except to the extent required by law. The Trustee shall be under no
liability for interest on any money received by it hereunder except as otherwise
agreed with the Company.

SECTION 607.  Compensation and Reimbursement.

          The Company agrees

          (1) to pay to the Trustee from time to time reasonable compensation
     for all services rendered by it hereunder (which compensation shall not be
     limited by any provision of law in regard to the compensation of a trustee
     of an express trust);

          (2) except as otherwise expressly provided herein, to reimburse the
     Trustee upon its request for all reasonable expenses, disbursements and
     advances incurred or made by the Trustee in accordance with any provision
     of this Indenture (including the reasonable compensation and the expenses
     and disbursements of its agents and counsel), except any such expense,
     disbursement or advance as may be attributable to its negligence or bad
     faith; and

          (3) to indemnify the Trustee for, and to hold it harmless against, any
     loss, liability or expense incurred without negligence or bad faith on its
     part, arising out of or in connection with the acceptance or administration
     of this trust, including the costs and expenses of enforcing this Indenture
     against the Company (including Section 607 hereof) and of defending itself
     against any claim or liability in connection with the exercise or
     performance of any of its powers or duties hereunder.

     The obligations of the Company under this Section 607 to compensate the
Trustee, to pay or reimburse the Trustee for expenses, disbursements and
advances and to indemnify and hold harmless the Trustee shall survive the
satisfaction and discharge of this Indenture. As security for the performance of
such obligations of the Company, the Trustee shall have a claim prior to the
Securities upon all

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<PAGE>   49

property and funds held or collected by the Trustee as such, except funds held
in trust for the payment of principal of or interest on particular Securities.

     When the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 501(9) or (10), the expenses (including
the reasonable charges and expenses of its counsel) of and the compensation for
such services are intended to constitute expenses of administration under any
applicable U.S. Federal or State bankruptcy, Canadian federal or provincial
insolvency or other similar law.

SECTION 608.  Disqualification: Conflicting Interests.

     If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.

SECTION 609.  Corporate Trustee Required; Eligibility.

     There shall at all times be a Trustee hereunder which shall be a Person
that is eligible pursuant to the Trust Indenture Act to act as such. Any
successor Trustee shall have a combined capital and surplus of at least
$50,000,000. If such Person publishes reports of condition at least annually,
pursuant to law or to the requirements of said supervising or examining
authority, then for the purposes of this Section, the combined capital and
surplus of such Person shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. If at any time
the Trustee shall cease to be eligible in accordance with the provisions of this
Section, it shall resign immediately in the manner and with the effect
hereinafter specified in this Article.

SECTION 610.  Resignation and Removal; Appointment of Successor.

          (a) No resignation or removal of the Trustee and no appointment of a
     successor Trustee pursuant to this Article shall become effective until the
     acceptance of appointment by the successor Trustee under Section 611.

          (b) The Trustee may resign at any time by giving written notice
     thereof to the Company. If an instrument of acceptance by a successor
     Trustee shall not have been delivered to the Trustee within 30 days after
     the giving of such notice of resignation, the resigning Trustee may
     petition any court of competent jurisdiction for the appointment of a
     successor Trustee.

          (c) The Trustee may be removed at any time by Act of the Holders of a
     majority in principal amount of the Outstanding Securities, delivered to
     the Trustee and to the Company.

          (d) If at any time:

               (1) the Trustee shall fail to comply with Section 608 after
          written request therefor by the Company or by any Holder who has been
          a bona fide Holder of a Security for at least six months, or

                                       39

<PAGE>   50

               (2) the Trustee shall cease to be eligible under Section 609 and
          shall fail to resign after written request therefor by the Company or
          by any such Holder, or

               (3) the Trustee shall become incapable of acting or shall be
          adjudged a bankrupt or insolvent or a receiver of the Trustee or of
          its property shall be appointed or any public officer shall take
          charge or control of the Trustee or of its property or affairs for the
          purpose of rehabilitation, conservation or liquidation, then, in any
          such case, (i) the Company by a Board Resolution may remove the
          Trustee, or (ii) subject to Section 514, any Holder who has been a
          bona fide Holder of a Security for at least six months may, on behalf
          of himself and all others similarly situated, petition any court of
          competent jurisdiction for the removal of the Trustee and the
          appointment of a successor Trustee.

          (e) If the Trustee shall resign, be removed or become incapable of
     acting, or if a vacancy shall occur in the office of Trustee for any cause,
     the Company, by a Board Resolution, shall promptly appoint a successor
     Trustee. If, within one year after such resignation, removal or
     incapability, or the occurrence of such vacancy, a successor Trustee shall
     be appointed by Act of the Holders of a majority in principal amount of the
     Outstanding Securities delivered to the Company and the retiring Trustee,
     the successor Trustee so appointed shall, forthwith upon its acceptance of
     such appointment, become the successor Trustee and supersede the successor
     Trustee appointed by the Company. If no successor Trustee shall have been
     so appointed by the Company or the Holders and accepted appointment in the
     manner hereinafter provided, any Holder who has been a bona fide Holder of
     a Security for at least six months may, on behalf of himself and all others
     similarly situated, petition any court of competent jurisdiction for the
     appointment of a successor Trustee.

          (f) The Company shall give notice of each resignation and each removal
     of the Trustee and each appointment of a successor Trustee to all Holders
     in the manner provided in Section 106. Each notice shall include the name
     of the successor Trustee and the address of its Corporate Trust Office.

SECTION 611.  Acceptance of Appointment by Successor.

     Every successor Trustee appointed hereunder shall execute, acknowledge and
deliver to the Company and to the retiring Trustee an instrument accepting such
appointment, and thereupon the resignation or removal of the retiring Trustee
shall become effective and such successor Trustee, without any further act, deed
or conveyance, shall become vested with all the rights, powers, trusts and
duties of the retiring Trustee; but, on request of the Company or the successor
Trustee, such retiring Trustee shall, upon payment of its charges, execute and
deliver an instrument transferring to such successor Trustee all the rights,
powers and trusts of the retiring Trustee and shall duly assign, transfer and
deliver to such successor Trustee all property and money held by such retiring
Trustee hereunder. Upon request of any such successor Trustee, the Company shall
execute any and all instruments for more fully and certainly vesting in and
confirming to such successor Trustee all such rights, powers and trusts.

     No successor Trustee shall accept its appointment unless at the time of
such acceptance such successor Trustee shall be qualified and eligible under
this Article.

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<PAGE>   51

SECTION 612.  Merger, Conversion, Consolidation or Succession to Business.

     Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
of the Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities shall have been authenticated,
but not delivered, by the Trustee then in office, any successor by merger,
conversion or consolidation to such authenticating Trustee may adopt such
authentication and deliver the Securities so authenticated with the same effect
as if such successor Trustee had itself authenticated such Securities.

SECTION 613.  Preferential Collection of Claims Against Company.

     If and when the Trustee shall be or become a creditor of the Company (or
any other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

SECTION 614.  Appointment of Authenticating Agent.

     The Trustee may appoint an Authenticating Agent or Agents which shall be
authorized to act on behalf of the Trustee to authenticate Securities issued
upon original issue and upon exchange, registration of transfer, partial
conversion or partial redemption or pursuant to Section 306, and Securities so
authenticated shall be entitled to the benefits of this Indenture and shall be
valid and obligatory for all purposes as if authenticated by the Trustee
hereunder. Wherever reference is made in this Indenture to the authentication
and delivery of Securities by the Trustee or the Trustee's certificate of
authentication, such reference shall be deemed to include authentication and
delivery on behalf of the Trustee by an Authenticating Agent and a certificate
of authentication executed on behalf of the Trustee by an Authenticating Agent.
Each Authenticating Agent shall be acceptable to the Company and shall at all
times be a corporation organized and doing business under the laws of the United
States of America, any State thereof or the District of Columbia, authorized
under such laws to act as Authenticating Agent, having a combined capital and
surplus of not less than $50,000,000 and subject to supervision or examination
by Federal or State authority. If such Authenticating Agent publishes reports of
condition at least annually, pursuant to law or to the requirements of said
supervising or examining authority, then for the purposes of this Section, the
combined capital and surplus of such Authenticating Agent shall be deemed to be
its combined capital and surplus as set forth in its most recent report of
condition so published. If at any time an Authenticating Agent shall cease to be
eligible in accordance with the provisions to this Section, such Authenticating
Agent shall resign immediately in the manner and with the effect specified in
this Section.

     Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall otherwise be eligible
under this Section, without the execution or filing of any paper or any further
act on the part of the Trustee or the Authenticating Agent.

                                       41

<PAGE>   52

     An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee and to the Company. The Trustee may at any time terminate
the agency of an Authenticating Agent by giving written notice thereof to such
Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall mail written notice of
such appointment by first-class mail, postage prepaid, to all Holders as their
names and addresses appear in the Security Register. Any successor
Authenticating Agent upon acceptance of its appointment hereunder shall become
vested with all the rights, powers and duties of its predecessor hereunder, with
like effect as if originally named as an Authenticating Agent. No successor
Authenticating Agent shall be appointed unless eligible under the provisions of
this Section.

     The Trustee agrees to pay to each Authenticating Agent from time to time
reasonable compensation for its services under this Section, and the Trustee
shall be entitled to be reimbursed for such payments, subject to the provisions
of Section 607.

     If an appointment is made pursuant to this Section, the Securities may have
endorsed thereon, in addition to the Trustee's certificate of authentication, an
alternative certificate of authentication in the following form:

     This is one of the Securities described in the within-mentioned Indenture.

                                        Wilmington Trust Company
                                           As Trustee

                                        By _____________________________________
                                           As Authenticating Agent

                                        By _____________________________________
                                           Authorized Officer

                                    ARTICLE 7

                Holders' Lists and Reports by Trustee and Company

SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders.

          The Company will furnish or cause to be furnished to the Trustee

          (a) semi-annually, not more than 15 days after each Regular Record
     Date, a list, in such form as the Trustee may reasonably require, of the
     names and addresses of the Holders as of such Regular Record Date, and

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<PAGE>   53

          (b) at such other times as the Trustee may request in writing, within
     30 days after the receipt by the Company of any such request, a list of
     similar form and content as of a date not more than 15 days prior to the
     time such list is furnished;

excluding from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

SECTION 702.  Preservation of Information; Communications to Holders.

          (a) The Trustee shall preserve, in as current a form as is reasonably
     practicable, the names and addresses of Holders contained in the most
     recent list furnished to the Trustee as provided in Section 701 and the
     names and addresses of Holders received by the Trustee in its capacity as
     Security Registrar. The Trustee may destroy any list furnished to it as
     provided in Section 701 upon receipt of a new list so furnished.

          (b) The rights of Holders to communicate with other Holders with
     respect to their rights under this Indenture or under the Securities and
     the corresponding rights and duties of the Trustee, shall be provided by
     the Trust Indenture Act.

          (c) Every Holder of Securities, by receiving and holding the same,
     agrees with the Company and the Trustee that neither the Company nor the
     Trustee nor any agent of either of them shall be held accountable by reason
     of any disclosure of information as to the names and addresses of Holders
     made pursuant to Section 312 of the Trust Indenture Act.

SECTION 703.  Reports by Trustee.

          (a) The Trustee shall transmit to Holders such reports concerning the
     Trustee and its actions under this Indenture as may be required pursuant to
     the Trust Indenture Act at the times and in the manner provided pursuant
     thereto.

          (b) A copy of each such report shall, at the time of such transmission
     to Holders, be filed by the Trustee with each stock exchange upon which the
     Securities are listed, with the Commission and with the Company. The
     Company will notify the Trustee when the Securities are listed on any stock
     exchange.

SECTION 704.  Reports by Company.

     The Company shall file with the Trustee and the Commission, and transmit to
Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to such Act; provided that any such information,
documents or reports required to be filed with the Commission pursuant to
Section 13 or 15(d) of the Exchange Act shall be filed with the Trustee within
15 days after the same is so required to be filed with the Commission.

                                       43

<PAGE>   54

                                    ARTICLE 8

              Consolidation, Merger, Conveyance, Transfer or Lease

SECTION 801.  Company May Consolidate, Etc. Only on Certain Terms.

     The Company may not, in a single transaction or a series of related
transactions, (i) consolidate or merge with or into any other Person or permit
any other Person to consolidate or merge with or into the Company or (ii)
directly or indirectly, transfer, sell, lease or otherwise dispose of all or
substantially all of its assets, unless:

          (1) in a transaction in which the Company does not survive or in which
     the Company sells, leases or otherwise disposes of all or substantially all
     of its assets, the successor entity to the Company (for purposes of this
     Article Eight, a "Successor Company") shall be a corporation, shall be
     organized and validly existing under the laws of the United States of
     America, any State thereof or the District of Columbia and shall expressly
     assume by an indenture supplemental hereto executed and delivered to the
     Trustee, in form satisfactory to the Trustee, the due and punctual payment
     of the principal of and interest on all the Securities and the performance
     of every covenant of this Indenture on the part of the Company to be
     performed or observed;

          (2) immediately before and after giving effect to such transaction, no
     Event of Default, and no event which, after notice or lapse of time, or
     both, would become an Event of Default, shall have occurred and be
     continuing;

          (3) the Company, or if applicable, the Successor Company has delivered
     to the Trustee an Officers' Certificate and an Opinion of Counsel, each
     stating that such consolidation, merger, conveyance, transfer, lease or
     acquisition and, if a supplemental indenture is required in connection with
     such transaction, such supplemental indenture, complies with this Article
     and that all conditions precedent herein provided for relating to such
     transaction have been complied with.

SECTION 802.  Successor Substituted.

     Upon any consolidation of the Company with, or merger of the Company into,
any other Person or any transfer, conveyance, sale, lease or other disposition
of all or substantially all of the properties and assets of the Company as an
entirety in accordance with Section 801, the Successor Company shall succeed to,
and be substituted for, and may exercise every right and power of, the Company
under this Indenture with the same effect as if such successor Person had been
named as the Company herein, and thereafter, except in the case of a lease, the
predecessor Person shall be relieved of all obligations and covenants under this
Indenture and the Securities.

                                       44

<PAGE>   55

                                    ARTICLE 9

                             Supplemental Indentures

SECTION 901.  Supplemental Indentures Without Consent of Holders.

     Without the consent of any Holders, the Company, when authorized by a Board
Resolution, and the Trustee, at any time and from time to time, may enter into
one or more indentures supplemental hereto, in form satisfactory to the Trustee,
for any of the following purposes:

          (1) to evidence the succession of another Person to the Company and
     the assumption by any such successor of the covenants of the Company herein
     and in the Securities; or

          (2) to add to the covenants of the Company for the benefit of the
     Holders, or to surrender any right or power herein conferred upon the
     Company; or

          (3) to comply with any requirements of the Commission in order to
     maintain the qualification of this Indenture under the Trust Indenture Act;
     or

          (4) to cure any ambiguity, to correct or supplement any provision
     herein which may be inconsistent with any other provision herein, or to
     make any other provisions with respect to matters or questions arising
     under this Indenture which shall not be inconsistent with the provisions of
     this Indenture, provided such action pursuant to this clause (4) shall not
     adversely affect the interests of the Holders in any material respect.

SECTION 902.  Supplemental Indentures with Consent of Holders.

     With the consent of the Holders of not less than a majority in principal
amount of the Outstanding Securities, by Act of said Holders delivered to the
Company and the Trustee, the Company, when authorized by a Board Resolution, and
the Trustee may enter into an indenture or indentures supplemental hereto for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of this Indenture or of modifying in any manner the rights
of the Holders under this Indenture; provided, however, that no such
supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby,

          (1) change the Stated Maturity of the principal of, or any instalment
     of interest on, any Security, or reduce the principal amount thereof or the
     rate of interest thereon, or change the place of payment where, or the coin
     or currency in which, any Security or the interest thereon is payable, or
     impair the right to institute suit for the enforcement of any such payment
     on or after the Stated Maturity thereof (or, in the case of redemption, on
     or after the Redemption Date), or

          (2) reduce the percentage in principal amount of the Outstanding
     Securities, the consent of whose Holders is required for any such
     supplemental indenture, or the consent of whose Holders is required for any
     waiver (of compliance with certain provisions of this Indenture or certain
     defaults hereunder and their consequences) provided for in this Indenture,
     or

                                       45

<PAGE>   56

          (3) modify any of the provisions of this Section, Section 513 or
     Section 1011, except to increase any such percentage or to provide that
     certain other provisions of this Indenture cannot be modified or waived
     without the consent of the Holder of each Outstanding Security affected
     thereby, or

          (4) following the mailing of an Offer with respect to an Offer to
     Purchase pursuant to Section 1401, modify the provisions of this Indenture
     with respect to such Offer to Purchase in a manner adverse to such Holder.

     It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

SECTION 903.  Execution of Supplemental Indentures.

     In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 601) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture. The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

SECTION 904.  Effect of Supplemental Indentures.

     Upon the execution of any supplemental indenture under this Article, this
Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby. No such supplemental indenture shall directly or
indirectly modify the provisions of Article Thirteen in any manner which might
terminate or impair the rights of the Senior Debt pursuant to such subordination
provisions.

SECTION 905.  Conformity with Trust Indenture Act.

     Every supplemental indenture executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act.

SECTION 906.  Reference in Securities to Supplemental Indentures.

     Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may, and shall if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture. If the Company shall so determine,
new Securities so modified as to conform, in the opinion of the Trustee and the
Company, to any such supplemental indenture may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities.

                                       46

<PAGE>   57

                                   ARTICLE 10

                                   Covenants

SECTION 1001.  Payment of Principal and Interest.

     The Company will duly and punctually pay the principal of and interest on
the Securities in accordance with the terms of the Securities and this
Indenture.

SECTION 1002.  Maintenance of Office or Agency.

     The Company will maintain in the City of Wilmington, Delaware, an office or
agency where Securities may be presented or surrendered for payment, where
Securities may be surrendered for registration of transfer or exchange and where
notices and demands to or upon the Company in respect of the Securities and this
Indenture may be served. The Company will give prompt written notice to the
Trustee of the location, and any change in the location, of such office or
agency. If at any time the Company shall fail to maintain any such required
office or agency or shall fail to furnish the Trustee with the address thereof,
such presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee, and the Company hereby appoints the
Trustee as its agent to receive all such presentations, surrenders, notices and
demands.

     The Company may also from time to time designate one or more other offices
or agencies (in or outside the City of Wilmington, Delaware) where the
Securities may be presented or surrendered for any or all such purposes and may
from time to time rescind such designations; provided, however, that no such
designation or rescission shall in any manner relieve the Company of its
obligation to maintain an office or agency in the City of Wilmington, Delaware,
for such purposes. The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other office or agency.

SECTION 1003.  Money for Security Payments to be Held in Trust.

     If the Company shall at any time act as its own Paying Agent, it will, on
or before each due date of the principal of or cash interest on any of the
Securities, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal or interest so becoming due until
such sums shall be paid to such Persons or otherwise disposed of as herein
provided and will promptly notify the Trustee of its action or failure so to
act.

     Whenever the Company shall have one or more Paying Agents, it will, prior
to each due date of the principal of or cash interest on any Securities, deposit
with a Paying Agent a sum sufficient to pay the principal or interest so
becoming due, such sum to be held in trust for the benefit of the Persons
entitled to such principal or interest, and (unless such Paying Agent is the
Trustee) the Company will promptly notify the Trustee of its action or failure
so to act.

     The Company will cause each Paying Agent other than the Trustee to execute
and deliver to the Trustee an instrument in which such Paying Agent shall agree
with the Trustee, subject to the provisions of this Section, that such Paying
Agent will:

                                       47

<PAGE>   58

          (1) hold all sums held by it for the payment of the principal of or
     interest on Securities in trust for the benefit of the Persons entitled
     thereto until such sums shall be paid to such Persons or otherwise disposed
     of as herein provided;

          (2) give the Trustee notice of any default by the Company (or any
     other obligor upon the Securities) in the making of any payment of
     principal or interest; and

          (3) at any time during the continuance of any such default, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums so
     held in trust by such Paying Agent.

     The Company may at any time, for the purpose of obtaining the satisfaction
and discharge of this Indenture or for any other purpose, pay, or by Company
Order direct any Paying Agent to pay, to the Trustee all sums held in trust by
the Company or such Paying Agent, such sums to be held by the Trustee upon the
same trusts as those upon which such sums were held by the Company or such
Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such
Paying Agent shall be released from all further liability with respect to such
money.

     Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of or interest on any
Security and remaining unclaimed for two years after such principal or interest
has become due and payable shall be paid to the Company on Company Request, or
(if then held by the Company) shall be discharged from such trust; and the
Holder of such Security shall thereafter, as an unsecured general creditor, look
only to the Company for payment thereof, and all liability of the Trustee or
such Paying Agent with respect to such trust money, and all liability of the
Company as trustee thereof, shall thereupon cease; provided, however, that the
Trustee or such Paying Agent, before being required to make any such repayment,
may at the expense of the Company cause to be published once, in a newspaper
published in the English language, customarily published on each Business Day
and of general circulation in The City of New York, notice that such money
remains unclaimed and that, after a date specified therein, which shall not be
less than 30 days from the date of such publication, any unclaimed balance of
such money then remaining will be repaid to the Company.

SECTION 1004.  Existence.

     Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence,
rights (charter and statutory) and franchises; provided, however, that the
Company shall not be required to preserve any such right or franchise if the
Board of Directors in good faith shall determine that the preservation thereof
is no longer desirable in the conduct of the business of the Company and that
the loss thereof is not disadvantageous in any material respect to the Holders.

SECTION 1005.  Maintenance of Properties.

     The Company will cause all properties used or useful in the conduct of its
business or the business of any Subsidiary of the Company to be maintained and
kept in good condition, repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
the Company may be necessary so that the business carried on in connection
therewith may be properly and advantageously conducted at all times; provided,
however, that nothing in this Section shall prevent the Company from

                                       48

<PAGE>   59

discontinuing the operation or maintenance of any of such properties if such
discontinuance is, as determined by the Board of Directors in good faith,
desirable in the conduct of its business or the business of any Subsidiary and
not disadvantageous in any material respect to the Holders.

SECTION 1006.  Payment of Taxes and Other Claims.

     The Company will pay or discharge or cause to be paid or discharged, before
the same shall become delinquent, (1) all taxes, assessments and governmental
charges levied or imposed upon the Company or any of its Subsidiaries or upon
the income, profits or property of the Company or any of its Subsidiaries, and
(2) all lawful claims for labor, materials and supplies which, if unpaid, might
by law become a lien upon the property of the Company or any of its
Subsidiaries; provided, however, that the Company shall not be required to pay
or discharge or cause to be paid or discharged any such tax, assessment, charge
or claim whose amount, applicability or validity is being contested in good
faith by appropriate proceedings.

SECTION 1007.  Maintenance of Insurance.

     The Company shall, and shall cause its Subsidiaries to, keep at all times
all of their properties which are of an insurable nature insured against loss or
damage with insurers believed by the Company to be responsible to the extent
that property of similar character is usually so insured by corporations
similarly situated and owning like properties in accordance with good business
practice. The Company shall, and shall cause its Subsidiaries to, use the
proceeds from any such insurance policy to repair, replace or otherwise restore
the property to which such proceeds relate.

SECTION 1008.  Limitation on Restricted Payments.

     The Company (i) may not, and may not permit any Subsidiary of the Company
to, directly or indirectly, declare or pay any dividend or make any distribution
(including any payment in connection with any merger or consolidation derived
from assets of the Company or any Subsidiary) in respect of its Capital Stock or
to the holders thereof, excluding (a) any dividends or distributions by the
Company payable solely in shares of its Common Stock (other than Redeemable
Stock) or in options, warrants or other rights to acquire its Common Stock
(other than Redeemable Stock), and (b) in the case of a Subsidiary, dividends or
distributions payable (1)to the Company or a Subsidiary and(2) to minority
shareholders of such Subsidiary, provided that at least a pro rata amount is
paid to the Company and/or a Subsidiary, as the case may be, and (ii) may not,
and may not permit any Subsidiary to, directly or indirectly, purchase, redeem,
or otherwise acquire or retire for value (a) any Capital Stock of the Company or
(b) any options, warrants or other rights to acquire shares of Capital Stock of
the Company or any securities convertible or exchangeable into shares of Capital
Stock of the Company (other than the Convertible Subordinated Notes) (each of
clauses (i) and (ii) being a "Restricted Payment") if: (1) an Event of Default,
or an event that with the passing of time or the giving of notice, or both,
would constitute an Event of Default, shall have occurred and be continuing or
would result from such Restricted Payment, or (2) upon giving effect to such
Restricted Payment, the aggregate of all Restricted Payments from the date of
original issuance of the Securities exceeds the sum of (a) 75% of cumulative
Consolidated Net Income (or, in the case Consolidated Net Income shall be
negative, less 100% of such deficit) of the Company from the date of original
issuance of the Securities through the last day of the last full fiscal quarter
ending immediately preceding such Restricted Payment for which quarterly or
annual financial statements are available (taken as a single accounting period);
plus (b) 100% of the aggregate net cash proceeds received by the Company after
the date of original issuance of the

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<PAGE>   60

Securities, from contributions of capital or the issuance and sale (other than
to a Subsidiary) of Capital Stock (other than Redeemable Stock) of the Company,
options, warrants or other rights to acquire Capital Stock (other than
Redeemable Stock) of the Company and indebtedness of the Company that has been
converted into or exchanged for Capital Stock (other than Redeemable Stock and
other than by or from a Subsidiary) of the Company after the date of original
issuance of the Securities. Prior to the making of any Restricted Payment, the
Company shall deliver to the Trustee an Officers' Certificate setting forth the
computations by which the determinations required by clause (2) above were made
and stating that no Event of Default, or event that with the passing of time or
the giving of notice, or both, would constitute an Event of Default, has
occurred and is continuing or will result from such Restricted Payment.

     Notwithstanding the foregoing, so long as no Event of Default, or event
that with the passing of time or the giving of notice, or both, would constitute
an Event of Default, shall have occurred and be continuing or would result
therefrom, (i) the Company and any Subsidiary of the Company may pay any
dividend on Capital Stock of any class within 60 days after the declaration
thereof if, on the date when the dividend was declared, the Company or such
Subsidiary could have paid such dividend in accordance with the foregoing
provisions; (ii) the Company may purchase, redeem, acquire or retire any shares
of Capital Stock of the Company solely in exchange for or out of the net
proceeds of the substantially concurrent sale (other than from or to a
Subsidiary or from or to an employee stock ownership plan financed by loans from
the Company or a Subsidiary of the Company) of shares of Capital Stock (other
than Redeemable Stock) of the Company. Any payment made pursuant to clause (i)
or (ii) of this paragraph shall be a Restricted Payment for purposes of
calculating aggregate Restricted Payments pursuant to the preceding paragraph.

SECTION 1009.  Limitation on Dividend and Other Payment Restrictions
               Affecting Subsidiaries.

     The Company may not, and may not permit any Subsidiary to, directly or
indirectly, create or otherwise cause or suffer to exist or become effective any
encumbrance or restriction on the ability of any Subsidiary of the Company to
pay dividends (in cash or otherwise) or make any other distributions in respect
of its Capital Stock owned by the Company or any other Subsidiary of the
Company. Notwithstanding the foregoing, the Company may, and may permit any
Subsidiary to, suffer to exist any such encumbrance or restriction:

          (a) pursuant to any agreement in effect on the date of original
     issuance of the Securities;

          (b) pursuant to an agreement relating to any indebtedness incurred by
     a Person (other than a Subsidiary of the Company existing on the date of
     original issuance of the Securities or any Subsidiary carrying on any of
     the businesses of any such Subsidiary) prior to the date on which such
     Person became a Subsidiary of the Company and outstanding on such date and
     not incurred in anticipation of becoming a Subsidiary, which encumbrance or
     restriction is not applicable to any Person, or the properties or assets of
     any Person, other than the Person so acquired;

          (c) pursuant to an agreement effecting a renewal, extension, refunding
     or refinancing of indebtedness incurred pursuant to an agreement referred
     to in clause (a) above, provided, however, that the provisions contained in
     such renewal, extension, refunding or refinancing agreement relating to
     such encumbrance or restriction are no more restrictive, taken as a whole,
     than the provisions contained in the agreement the subject thereof, as
     determined in good faith by the Board of Directors and evidenced by a
     resolution of the Board of Directors filed with the Trustee;

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<PAGE>   61

          (d) with respect to a Subsidiary of the Company imposed pursuant to an
     agreement which has been entered into for the sale or disposition of all or
     substantially all of the Capital Stock or assets of such Subsidiary,
     provided that consummation of such transaction would not result in an Event
     of Default or an event that, with the passing of time or the giving of
     notice or both, would constitute an Event of Default, that such restriction
     terminates if such transaction is closed or abandoned and that the closing
     or abandonment of such transaction occurs within one year of the date such
     agreement was entered into;

          (e) if such encumbrance or restriction is the result of applicable
     corporate law or regulation relating to the payment of dividends or
     distributions.

SECTION 1010.  Limitation on Distributions of Assets to Shareholders.

     The Company may not, and may not permit any Subsidiary to, directly or
indirectly, distribute, as a dividend or otherwise, any Capital Stock of a
Subsidiary to shareholders of the Company, unless such Subsidiary shall have
fully and unconditionally guaranteed the payment of principal and interest on
the Securities.

SECTION 1011.  Statement By Officers as to Default; Compliance Certificates.

          (a) The Company will deliver to the Trustee, within 120 days after the
     end of each fiscal year of the Company ending after the date hereof an
     Officers' Certificate, stating whether or not to the best knowledge of the
     signers thereof the Company is in default in the performance and observance
     of any of the terms, provisions and conditions of Section 801 or Sections
     1004 to 1009, inclusive, and if the Company shall be in default, specifying
     all such defaults and the nature and status thereof of which they may have
     knowledge.

          (b) The Company shall deliver to the Trustee, as soon as possible and
     in any event within 10 days after the Company becomes aware or should
     reasonably become aware of the occurrence of an Event of Default or an
     event which, with notice or the lapse of time or both, would constitute an
     Event of Default, an Officers' Certificate setting forth the details of
     such Event of Default or default, and the action which the Company proposes
     to take with respect thereto.

          (c) The Company shall deliver to the Trustee within 90 days after the
     end of each fiscal year a written statement by the Company's independent
     auditors or public accountants stating (A) that their audit examination has
     included a review of the terms of this Indenture and the Securities as they
     relate to accounting matters, and (B) whether, in connection with their
     audit examination, any event which, with notice or the lapse of time or
     both, would constitute an Event of Default has come to their attention and,
     if such a default has come to their attention, specifying the nature and
     period of the existence thereof.

SECTION 1012.  Waiver of Certain Covenants.

     The Company may omit in any particular instance to comply with any covenant
or condition set forth in Section 801 and Sections 1004 to 1010 inclusive, if
before the time for such compliance the Holders of at least a majority in
principal amount of the Outstanding Securities shall, by Act of such Holders,
either waive such compliance in such instance or generally waive compliance with
such covenant or

                                       51

<PAGE>   62

condition, but no such waiver shall extend to or affect such covenant or
condition except to the extent so expressly waived, and, until such waiver shall
become effective, the obligations of the Company and the duties of the Trustee
in respect of any such covenant or condition shall remain in full force and
effect.

SECTION 1013.  Indemnification of Judgment Currency.

     The Company shall indemnify the Trustee and any Holder against any loss
incurred by the Trustee or such Holder, as the case may be, as a result of any
judgment or order being given or made for any amount due under this Indenture or
such Security and being expressed and paid in a currency (the "Judgment
Currency") other than Dollars, and as a result of any variation between (i) the
rate of exchange at which the Dollar amount is converted into the Judgment
Currency for the purpose of such judgment or order and (ii) the spot rate of
exchange in The City of New York at which the Trustee or such Holder, as the
case may be, on the date of payment of such judgment or order is able to
purchase Dollars with the amount of the Judgment Currency actually received by
the Trustee or such Holder. The foregoing indemnity shall constitute a separate
and independent obligation of the Company and shall continue in full force and
effect notwithstanding any such judgment or order as aforesaid. The term "spot
rate of exchange" shall include any premiums and costs of exchange payable in
connection with the purchase of, or conversion into, United States dollars as
quoted by The Bank of Nova Scotia at its central foreign exchange desk in its
head office in Toronto at 12:00 noon (Toronto time).

SECTION 1014.  Available Information.

     Whether or not the Company is required to be subject to Section 13(a) or
15(d) of the Exchange Act, or any successor provision thereto, the Company shall
file with the Commission the annual reports, quarterly reports and other
documents which the Company would have been required to file with the Commission
pursuant to such Section 13(a) or 15(d) or any successor provision thereto if
the Company were so required, such documents to be filed with the Commission on
or prior to the respective dates (the "Required Filing Dates") by which the
Company would have been required so to file such documents if the Company were
so required. The Company shall also in any event (a) within 15 days of each
Required Filing Date (i) transmit by mail to all Holders, as their names and
addresses appear in the Security Register, without cost to such Holders, and
(ii) furnish to the Trustee, copies of the annual reports, quarterly reports and
other documents which the Company files with the Commission pursuant to such
Section 13(a) or 15(d) or any successor provision thereto or would have been
required to file with the Commission pursuant to such Section 13(a) or 15(d) or
any successor provisions thereto if the Company were required to be subject to
such Sections and (b) if filing such documents by the Company with the
Commission is not permitted under the Exchange Act, promptly upon written
request supply copies of such documents to any prospective Holder.

SECTION 1015.  Acquisition of Securities.

     The Company shall not, and shall cause its Affiliates not to, resell or
otherwise dispose of any Securities acquired by them, in the open market or
otherwise, and shall, and shall cause its Affiliates to, surrender all such
Securities acquired to the Trustee for cancellation.

                                       52

<PAGE>   63

                                   ARTICLE 11

                            Redemption of Securities

SECTION 1101.  Right of Redemption.

     The Securities may be redeemed at the election of the Company, other than
through the operation of the Sinking Fund as provided for in Section 1109, as a
whole or from time to time in part, at any time, in amounts of $1.00 or any
integral multiples of $1.00 at the Redemption Price specified in the form of
Security hereinbefore set forth together with accrued interest to the Redemption
Date. The election of the Company to redeem any Securities pursuant to Section
1101 shall be evidenced by a Board Resolution.

SECTION 1102.  Applicability of Article.

     Redemption of Securities, as permitted by any provision of this Indenture,
shall be made in accordance with such provision and this Article.

SECTION 1103.  Notices to Trustee.

     If the Company elects to redeem Securities pursuant to Section 1101, or is
required to redeem Securities pursuant to the operation of the Sinking Fund
provided for in Section 1109, it shall notify the Trustee of the Redemption Date
and the principal amount of Securities to be redeemed. The Company shall give
each notice to the Trustee provided for in this Section 1103 at least five days
prior to the date on which notice is to be given (or such shorter period as the
Trustee may permit), as set forth in section 1105. Any such notice may be
canceled at any time prior to notice of such redemption being mailed to any
Holder and shall thereby be void and of no effect. In case of any redemption at
the election of the Company of less than all the Securities, the notification to
the Trustee shall specify the principal amount of Securities to be redeemed. In
the event that, with respect to a redemption of Securities pursuant to the
operation of the Sinking Fund provided for in Section 1109, the Company elects
to reduce the amount of any Sinking Fund Payment pursuant to the provisions of
Section 1109(a), the notice to the Trustee shall also state the amount of such
reduction and the basis for such reduction as set forth in Section 1109.

SECTION 1104.  Selection by Trustee of Securities to Be Redeemed.

     If less than all the Securities are to be redeemed, the particular
Securities to be redeemed shall be selected not more than 60 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities not previously
called for redemption, by such method as the Trustee shall deem fair and
appropriate and which may provide for the selection for redemption of portions
(equal to $1.00 or any integral multiple thereof) of the principal amount of
Securities of a denomination larger than $1.00.

     The Trustee shall promptly notify the Company and each Security Registrar
in writing of the Securities selected for redemption and, in the case of any
Securities selected for partial redemption, the principal amount thereof to be
redeemed.

     For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Securities which has been or is to be redeemed.

                                       53

<PAGE>   64

SECTION 1105.  Notice of Redemption.

     Notice of redemption, whether through operation of the Sinking Fund or
otherwise, shall be given by first-class mail, postage prepaid, mailed not less
than 30 nor more than 60 days prior to the Redemption Date, to each Holder of
Securities to be redeemed, at its address appearing in the Security Register.

          All notices of redemption shall set forth:

          (1) the Redemption Date,

          (2) the Redemption Price,

          (3) a brief statement setting forth the Company's right to effect such
     redemption and the Company's basis therefor,

          (4) if less than all the Outstanding Securities are to be redeemed,
     the identification (and, in the case of partial redemption, the principal
     amounts) of the particular Securities to be redeemed,

          (5) that on the Redemption Date the Redemption Price will become due
     and payable upon each such Security to be redeemed and that interest
     thereon will cease to accrue on and after said date,

          (6) whether the redemption notice is being sent pursuant to the
     optional redemption provisions of Section 1101 or pursuant to the operation
     of the Sinking Fund provided for in Section 1109, and

          (7) the place or places where such Securities are to be surrendered
     for payment of the Redemption Price.

     Notice of redemption of Securities to be redeemed at the election of the
Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

SECTION 1106.  Deposit of Redemption Price.

     On or prior to 9:00 a.m. New York City time on any Redemption Date, the
Company shall deposit with the Trustee or with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) an amount of money sufficient to pay the Redemption
Price of, and (except if the Redemption Date shall be an Interest Payment Date)
accrued interest on, all the Securities which are to be redeemed on that date.

SECTION 1107.  Securities Payable on Redemption Date.

     Notice of redemption having been given as aforesaid, the Securities so to
be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued

                                       54

<PAGE>   65

interest) such Securities shall cease to bear interest. Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption Price, together with accrued interest
to the Redemption Date; provided, however, that installments of interest whose
Stated Maturity is on or prior to the Redemption Date shall be payable to the
Holders of such Securities, or one or more Predecessor Securities, registered as
such at the close of business on the relevant Record Dates according to their
terms and the provisions of Section 307.

     If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal shall, until paid, bear interest from the
Redemption Date at the rate provided by the Security.

SECTION 1108.  Securities Redeemed in Part.

     Any Security which is to be redeemed only in part shall be surrendered at
an office or agency of the Company designated for that purpose pursuant to
Section 1002 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company and
the Trustee duly executed by, the Holder thereof or his attorney duly authorized
in writing), and the Company shall execute, and the Trustee shall authenticate
and deliver to the Holder of such Security without service charge, a new
Security or Securities, of any authorized denomination as requested by such
Holder, in aggregate principal amount equal to and in exchange for the
unredeemed portion of the principal of the Security so surrendered.

SECTION 1109.  Sinking Fund.

     (a) As and for a Sinking Fund for the retirement of the Securities,
provided that the Senior Indebtedness is not, or as a result of any payment
under this Section will not be, in default, the Company will, until all the
Securities are paid or payment thereof provided for, deposit in accordance with
Section 1106 on or prior to each Sinking Fund Payment Date an amount in cash
sufficient to redeem on such Sinking Fund Payment Date, at a Redemption Price
equal to 100% of the aggregate principal amount of the Securities so redeemed,
20% of the aggregate principal amount of Outstanding Securities as of April 15,
2005, or such lesser amount as may be outstanding, plus all accrued and unpaid
interest thereon; provided that such principal amount of Securities to be
redeemed may, at the option of the Company, be reduced in inverse order of
maturity by an amount equal to the sum of (i) the principal amount of Securities
theretofore issued and acquired at any time by the Company and delivered to the
Trustee for cancellation, and not theretofore made the basis of a Sinking Find
payment and (ii) the principal amount of Securities at any time redeemed and
paid pursuant to the provisions of Section 1101, or which shall at any time have
been duly called for redemption (other than through operation of the Sinking
Fund) and the Redemption Price of which shall have been deposited in trust for
that purpose and which have not been theretofore made the basis of a Sinking
Fund Payment.

     (b) Each Sinking Fund payment shall be applied to the redemption of
Securities on the related Sinking Fund Payment Date.

     (c) In the event that the Company elects to reduce the amount of any
Sinking Fund Payment pursuant to the provisions of Section1109 (a), the notice
to the Trustee shall also state the amount of such reduction and the basis for
such reduction as provided in Section1109(a).

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<PAGE>   66

                                   ARTICLE 12

                       Defeasance and Covenant Defeasance

SECTION 1201.  Company's Option to Effect Defeasance or Covenant Defeasance.

     The Company may at its option by Board Resolution, at any time, elect to
have either Section 1202 or Section 1203 applied to the Outstanding Securities
upon compliance with the conditions set forth below in this Article Twelve.

SECTION 1202.  Defeasance and Discharge.

     Upon the Company's exercise of the option provided in Section 1201
applicable to this Section, the Company shall be deemed to have been discharged
from its obligations with respect to the Outstanding Securities (other than its
ongoing obligations in respect of the payment of Additional Amounts) on the date
the conditions set forth below are satisfied (hereinafter, "defeasance"). For
this purpose, such defeasance means that the Company shall be deemed to have
paid and discharged the entire indebtedness represented by the Outstanding
Securities and to have satisfied all its other obligations under such Securities
and this Indenture insofar as such Securities are concerned (and the Trustee, at
the expense of the Company, shall execute proper instruments acknowledging the
same), except for the following which shall survive until otherwise terminated
or discharged hereunder: (A) the rights of Holders of such Securities to
receive, solely from the trust fund described in Section 1204 and as more fully
set forth in such Section, payments in respect of the principal of and interest
on such Securities when such payments are due, (B) the Company's obligations
with respect to such Securities under Sections 304, 305, 306, 1002 and 1003, (C)
the rights, powers, trusts, duties and immunities of the Trustee hereunder and
(D) this Article Twelve. Subject to compliance with this Article Twelve, the
Company may exercise its option under this Section 1202 notwithstanding the
prior exercise of its option under Section 1203.

SECTION 1203.  Covenant Defeasance.

     Upon the Company's exercise of the option provided in Section 1201
applicable to this Section, (i) the Company shall be released from its
obligations under Sections 1005 through 1007, inclusive, and clauses (2) and (3)
of Section 801, (ii) the occurrence of an event specified in Sections 501(3),
501(4) (with respect to clauses (2) and (3) of Section 801), 501(5) (with
respect to any of Sections 1005 through 1010, inclusive), 501(6), 501(7) and
501(8) shall not be deemed to be an Event of Default (hereinafter, "covenant
defeasance"). For this purpose, such covenant defeasance means that the Company
may omit to comply with and shall have no liability in respect of any term,
condition or limitation set forth in any such Section, Clause or Article,
whether directly or indirectly by reason of any reference elsewhere herein to
any such Section, Clause or Article or by reason of any reference in any such
Section, Clause or Article to any other provision herein or in any other
document, but the remainder of this Indenture and such Securities shall be
unaffected thereby.

SECTION 1204.  Conditions to Defeasance or Covenant Defeasance.

     The following shall be the conditions to application of either Section 1202
or Section 1203 to the then Outstanding Securities:

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<PAGE>   67

          (1) The Company shall irrevocably have deposited or caused to be
     deposited with the Trustee (or another trustee satisfying the requirements
     of Section 609 who shall agree to comply with the provisions of this
     Article Twelve applicable to it) as trust funds in trust for the purpose of
     making the following payments, specifically pledged as security for, and
     dedicated solely to, the benefit of the Holders of such Securities, (A)
     money in an amount, or (B) U.S. Government Obligations which through the
     scheduled payment of principal and interest in respect thereof in
     accordance with their terms will provide, not later than one day before the
     due date of any payment, money in an amount, or (C) a combination thereof,
     sufficient, in the opinion of a nationally recognized firm of independent
     certified public accountants expressed in a written certification thereof
     delivered to the Trustee, to pay and discharge, and which shall be applied
     by the Trustee (or other qualifying trustee) to pay and discharge, the
     principal of and each instalment of interest on the Securities on the
     Stated Maturity (or Redemption Date, if applicable) of such principal or
     instalment of interest in accordance with the terms of this Indenture and
     of such Securities. For this purpose, "U.S. Government Obligations" means
     securities that are (x) direct obligations of the United States of America
     for the payment of which its full faith and credit is pledged or (y)
     obligations of a Person controlled or supervised by and acting as an agency
     or instrumentality of the United States of America the payment of which is
     unconditionally guaranteed as a full faith and credit obligation by the
     United States of America, which, in either case, are not callable or
     redeemable at the option of the issuer thereof, and shall also include a
     depository receipt issued by a bank (as defined in Section 3(a)(2) of the
     Securities Act of 1933, as amended) as custodian with respect to any such
     U.S. Government Obligation or a specific payment of principal of or
     interest on any such U.S. Government Obligation held by such custodian for
     the account of the holder of such depository receipt, provided that (except
     as required by law) such custodian is not authorized to make any deduction
     from the amount payable to the holder of such depository receipt from any
     amount received by the custodian in respect of the U.S. Government
     Obligation or the specific payment of principal of or interest on the U.S.
     Government Obligation evidenced by such depository receipt.

          (2) In the case of an election under Section 1202, the Company shall
     have delivered to the Trustee an Opinion of Counsel qualified to practice
     law in the United States stating that (x) the Company has received from, or
     there has been published by, the Internal Revenue Service a ruling, or (y)
     since the date of this Indenture there has been a change in the applicable
     U.S. Federal income tax law, in either case to the effect that, and based
     thereon such opinion shall confirm that, the Holders of the Outstanding
     Securities will not recognize gain or loss for U.S. Federal income tax
     purposes as a result of such deposit, defeasance and discharge and will be
     subject to U.S. Federal income tax on the same amount, in the same manner
     and at the same times as would have been the case if such deposit,
     defeasance and discharge had not occurred.

          (3) In the case of an election under Section 1203, the Company shall
     have delivered to the Trustee an Opinion of Counsel qualified to practice
     law in the United States to the effect that the Holders of the Outstanding
     Securities will not recognize gain or loss for U.S. Federal income tax
     purposes as a result of such deposit and covenant defeasance and will be
     subject to U.S. Federal income tax on the same amount, in the same manner
     and at the same times as would have been the case if such deposit and
     covenant defeasance had not occurred.

          (4) Such defeasance or covenant defeasance shall not cause the Trustee
     to have a conflicting interest as defined in Section 608 and for purposes
     of the Trust Indenture Act with respect to any securities of the Company.

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<PAGE>   68

          (5) No Event of Default or event which with notice or lapse of time or
     both would become an Event of Default shall have occurred and be continuing
     on the date of such deposit or, insofar as subsections 501(9) and (10) are
     concerned, at any time during the period ending on the 121st day after the
     date of such deposit (it being understood that this condition shall not be
     deemed satisfied until the expiration of such period).

          (6) The Company shall have delivered to the Trustees an Opinion of
     Counsel qualified to practice law in the United States to the effect that
     such deposit shall not cause either Trustee or the trust so created to be
     subject to the Investment Company Act.

          (7) Such defeasance or covenant defeasance shall not result in a
     breach or violation of, or constitute a default under, any other agreement
     or instrument to which the Company is a party or by which it is bound.

          (8) The Company shall have delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each stating that all conditions
     precedent provided for relating to either the defeasance under Section 1202
     or the covenant defeasance under Section 1203 (as the case may be) have
     been complied with.

SECTION 1205.  Deposited Money and U.S. Government Obligations to be Held in
               Trust: Other Miscellaneous Provisions.

     Subject to the provisions of the last paragraph of Section 1003, all money
and U.S. Government Obligations (including the proceeds thereof) deposited with
the Trustee (or other qualifying trustee - collectively, for purposes of this
Section 1205, the "Trustee") pursuant to Section 1204 in respect of the
Securities shall be held in trust and applied by the Trustee, in accordance with
the provisions of such Securities and this Indenture, to the payment, either
directly or through any Paying Agent (including the Company acting as its own
Paying Agent) as the Trustee may determine, to the Holders of such Securities,
of all sums due and to become due thereon in respect of principal and interest,
but such money need not be segregated from other funds except to the extent
required by law.

     The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the U.S. Government Obligations
deposited pursuant to Section 1204 or the principal and interest received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of the Outstanding Securities.

     Anything in this Article Twelve to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon Company
Request any money or U.S. Government Obligations held by it as provided in
Section 1204 which, in the opinion of a nationally recognized firm of
independent public accountants expressed in a written certification thereof
delivered to the Trustee, are in excess of the amount thereof which would then
be required to be deposited to effect an equivalent defeasance or covenant
defeasance.

     All moneys deposited pursuant to this Article shall not be subject to the
claims of holders of Senior Indebtedness under Article Thirteen.

                                       58

<PAGE>   69

SECTION 1206.  Reinstatement.

     If the Trustee or the Paying Agent is unable to apply any money in
accordance with Section 1202 or 1203 by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, then the Company's obligations under this Indenture and the
Securities shall be revived and reinstated as though no deposit had occurred
pursuant to this Article Twelve until such time as the Trustee or Paying Agent
is permitted to apply all such money in accordance with Section 1202 or 1203;
provided, however, that if the Company makes any payment of principal of or
interest on any Security following the reinstatement of its obligations, the
Company shall be subrogated to the rights of the Holders of such Securities to
receive such payment from the money held by the Trustee or the Paying Agent.

                                   ARTICLE 13

                          Subordination of Securities

SECTION 1301.  Securities Subordinated to Senior Indebtedness.

     All Securities issued under this Indenture shall be issued subject to the
following provisions and each Holder of any Security whether upon original issue
or upon transfer or assignment thereof accepts and agrees to be bound by such
provisions.

     All Securities issued hereunder shall, to the extent and in the manner
hereinafter set forth, be subordinated and subject in right of payment to the
prior payment in full in cash of all Senior Indebtedness and termination of all
commitments under the Exit Facility. "Senior Indebtedness" means (i) the
principal, premium, if any, and interest (regardless whether such interest is
an allowable claim after the commencement of any dissolution or winding up or
total or partial liquidation or reorganization of the Company, whether voluntary
or involuntary or in bankruptcy, insolvency, receivership or other proceedings)
in respect of indebtedness of the Company, whether outstanding on the date of
the Indenture or thereafter incurred, for money borrowed or pursuant to any
obligation of the Company for the reimbursement on any letter of credit, bankers
acceptance, security purchase facility or similar credit transaction, in each
case pursuant to (A) a credit facility with or agented by, a Bank, or (B)
pursuant to the Credit Agreement or the Exit Facility, (ii) any amendments,
renewals, extensions, refinancings, replacements or refundings of any
obligations of the type referred to in clause (i) above (regardless of whether
such amendment, renewal, extension, refinancing, replacement or refunding is
pursuant to a credit facility with or agented by a Bank), (iii) all obligations
of the type referred to in clauses (i) and (ii) above of any Affiliate of the
Company for the payment of which the Company is responsible or liable as
obligor, guarantor or otherwise, and (iv) all obligations of the type referred
to in clauses (i) through (iii) above of any Affiliate of the Company secured by
any lien on any property or asset of the Company (whether or not such obligation
is assumed by the Company), except for any such indebtedness or other obligation
that is by its terms subordinated to or pari passu with the Securities.

                                       59

<PAGE>   70

SECTION 1302.  No Payments in Certain Circumstances;
               Payment Over of Proceeds Upon Dissolution, Etc.

     No payment on account of principal of, premium, if any, or interest on, or
redemption or purchase (including, without limitation, a purchase pursuant to
Article 14 of this Indenture) of, the Securities shall be made if, at the time
of such payment or immediately after giving effect thereto: (i) there shall
exist a default in the payment of principal of, premium, if any, sinking funds
or interest (including a default under any purchase or redemption obligations or
a default in the payment of interest after the commencement of any dissolution
or winding up or total or partial liquidation or reorganization of the Company,
whether voluntary or involuntary or in bankruptcy, insolvency, receivership or
other proceeding at the rate specified in the applicable Senior Indebtedness,
whether or not such interest is an allowable claim in such proceeding) with
respect to any Senior Indebtedness, or (ii) there shall have occurred an event
of default (other than a default in the payment of principal, premium, if any,
sinking funds or interest) with respect to any Senior Indebtedness, as defined
therein or in the instrument under which the same is outstanding, permitting the
holders thereof to accelerate the maturity thereof and such event of default
shall not have been cured or waived or shall not have ceased to exist.
Notwithstanding the foregoing, the Company may make, and the Trustee may receive
and shall apply, any payment in respect of the Securities (for principal,
premium, if any, or interest or purchase) if such payment was made prior to the
occurrence of any of the contingencies specified in clauses (i) and (ii) above.

     Upon (i) any acceleration of the principal amount due on the Securities or
(ii) any payment or distribution of assets of the Company of any kind or
character, whether in cash, property or securities, to creditors upon any
dissolution or winding up or total or partial liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all principal of, premium, if any, sinking
fund and interest due or to become due upon all Senior Indebtedness shall first
be paid in full (including interest after the commencement of any such
proceeding at the rate specified in the applicable Senior Indebtedness, whether
or not such interest is an allowable claim in such proceeding), or payment
thereof provided for in cash in accordance with its terms, before any payment is
made on account of the principal of, or interest on, or purchase of, the
indebtedness evidenced by the Securities, and upon any such dissolution or
winding up or liquidation or reorganization any payment or distribution of
assets of the Company of any kind or character, whether in cash, property or
securities, to which the holders of the Securities or the Trustee under this
Indenture would be entitled, except for the provisions hereof, shall be paid by
the Company or by any receiver, trustee in bankruptcy, liquidating trustee,
agent or other Person making such payment or distribution, or by the holders of
the Securities or by the Trustee under this Indenture if received by them or it,
as the case may be, directly to the holders of Senior Indebtedness (in
accordance with their relative priority and otherwise pro rata to each such
holder on the basis of the respective amounts of Senior Indebtedness held by
such holder) or their representatives, to the extent necessary to pay all Senior
Indebtedness in full (including interest after the commencement of any
dissolution or winding up or total or partial liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, at the rate specified in the applicable
Senior Indebtedness, whether or not such interest is an allowable claim in such
proceeding), in money or money's worth, after giving effect to any concurrent
payment or distribution to or for the holders of Senior Indebtedness, before any
payment or distribution is made to the holders of the Securities or to the
Trustee under this Indenture.

     If any default or event described in the first paragraph of this Section
1302 shall have occurred, any payment or distribution of assets of the Company
of any kind or character, whether in cash,

                                       60

<PAGE>   71

property or securities, received by the Trustee or the holders of the Securities
before all Senior Indebtedness is paid in full (including interest after the
commencement of any such proceeding at the rate specified in the applicable
Senior Indebtedness, whether or not such interest is an allowable claim in such
proceeding) or provision made for such payment, in accordance with its terms
shall be held in trust for the benefit of, and shall be paid over or delivered
to, the holders of such Senior Indebtedness or their representative or
representatives, or to the trustee or trustees under any indenture pursuant to
which any instruments evidencing any of such Senior Indebtedness have been
issued, as their respective interests may appear, for application to the payment
of all Senior Indebtedness remaining unpaid to the extent necessary to pay all
such Senior Indebtedness in full in accordance with its terms (including
interest after the commencement of any dissolution or winding up or total or
partial liquidation or reorganization of the Company, whether voluntary or
involuntary or in bankruptcy, insolvency, receivership or other proceedings, at
the rate specified in the applicable Senior Indebtedness, whether or not such
interest is an allowable claim in such proceeding), after giving effect to any
concurrent payment or distribution to or for the holders of such Senior
Indebtedness.

     Subject to the payment in full of all Senior Indebtedness, including the
payment of any interest in respect of any interest payment date occurring after
the commencement of any dissolution or winding up or total or partial
liquidation or reorganization of the Company, whether voluntary or involuntary
or in bankruptcy, insolvency, receivership or other proceeding, the holders of
the Securities (together with the holders of any other indebtedness of the
Company which is subordinated in right of payment to the payment in full of all
Senior Indebtedness,which is not subordinated in right of payment to the
Securities and which by its terms grants such right of subrogation to the
holders thereof) shall be subrogated to the rights of the holders of Senior
Indebtedness to receive payments or distributions of assets of the Company made
on the Senior Indebtedness until the principal of, premium, if any, and interest
on, or purchase of, the Securities shall be paid in full; and, for the purposes
of such subrogation, no payments or distributions to the holders of Senior
Indebtedness of any cash, property or securities to which the holders of the
Securities or the Trustee would be entitled except for the provisions of this
Article, and no payment over pursuant to the provisions of this Article to the
holders of Senior Indebtedness by the holders of the Securities or the Trustee,
shall, as between the Company, its creditors other than the holders of Senior
Indebtedness, and the holders of Securities, be deemed to be a payment by the
Company to the holders of or on account of Senior Indebtedness, it being
understood that the provisions of this Article are and are intended solely for
the purpose of defining the relative rights of the holders of the Securities, on
the one hand, and the holders of Senior Indebtedness, on the other hand.

SECTION 1303.  Notice to Trustee of Specified Events;
               Reliance on Certificate of Liquidating Agent.

     The Company shall give prompt written notice to the Trustee of any
insolvency or bankruptcy proceeding in respect of the Company, of any
proceedings for voluntary liquidation, dissolution or other winding up of the
Company (whether or not involving insolvency or bankruptcy), of the declaration
of any Security as due and payable before its expressed maturity, and of any
event which pursuant to Section 1302 would prevent payment by the Company on
account of the principal, or interest on, or purchase of, the Securities. The
Trustee, subject to the provisions of Section 601, shall be entitled to assume
that no such event has occurred unless the Company, or a holder of Senior
Indebtedness, or any trustee therefor, has given such notice.

     Upon any distribution of assets of the Company or payment by or on behalf
of the Company referred to in this Article, the Trustee and the holders of the
Securities shall be entitled to rely upon any order

                                       61

<PAGE>   72

or decree of a court of competent jurisdiction in which any proceedings of the
nature referred to in Section 1302 are pending, and the Trustee, subject to the
provisions of Section 601, and the holders of the Securities shall be entitled
to rely upon a certificate of the liquidating trustee or agent or other Person
making any distribution to the Trustee or to the holders of the Securities for
the purpose of ascertaining the Persons entitled to participate in such
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article.
In the event that the Trustee determines, in good faith, that further evidence
is required with respect to the right of any Person as a holder of Senior
Indebtedness to participate in any payment or distribution pursuant to this
Article, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness
held by such Person, as to the extent to which such Person is entitled to
participate in such payment or distribution, and as to other facts pertinent to
the rights of such Person under this Article, and if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

     The Trustee shall be entitled to rely on the delivery to it of a written
notice by a Person representing itself to be a holder of Senior Indebtedness (or
a trustee on behalf of such holder) to establish that such notice has been given
by a holder of Senior Indebtedness or a trustee on behalf of any such holder or
holders. In the event that the Trustee determines in good faith that further
evidence is required with respect to the right of any Person as a holder of
Senior Indebtedness to participate in any payment or distribution pursuant to
this Article Thirteen, the Trustee may request such Person to furnish evidence
to the reasonable satisfaction of the Trustee as to the amount of Senior
Indebtedness held by such Person, the extent to which such Person is entitled to
participate in such payment or distribution and any other facts pertinent to the
rights of such Person under this Article Thirteen and, if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

SECTION 1304.  Trustee to Effectuate Subordination.

     The Holder of each Security by its acceptance thereof authorizes and
directs the Trustee on its behalf to take such action as may be necessary or
appropriate to acknowledge or effectuate the subordination as provided in this
Article and appoints the Trustee as attorney-in-fact for any and all such
purposes.

SECTION 1305.  Trustee Not Charged with Knowledge of Prohibition.

     Notwithstanding the provisions of this Article or any other provision of
this Indenture, but subject to the provisions of Section 601 as between the
holders of Securities and the Trustee, neither the Trustee nor any Paying Agent
shall be charged with knowledge of any facts which would prohibit the making of
any payment of moneys to or by the Trustee or any such Paying Agent, unless and
until the Trustee or such Paying Agent shall have received written notice
thereof at its Corporate Trust Office from the Company or any holder of Senior
Indebtedness or the trustee or representative of any holder of such Senior
Indebtedness on his behalf; and, prior to the receipt of any such written
notice, the Trustee and any such Paying Agent shall be entitled to assume that
no such facts exist. If the Trustee or Paying Agent, as the case may be, shall
not have received, at least three Business Days prior to the date upon which by
the terms hereof any such moneys may become payable for any purpose (including,
without limitation, the payment of the principal of, premium, if any, or the
interest on any Security) with respect to such moneys, the notice provided for
in this

                                       62

<PAGE>   73

Section, then, anything herein contained to the contrary notwithstanding, the
Trustee and such Paying Agent, as the case may be, shall have full power and
authority to receive such moneys and to apply the same to the purpose for which
they were received and shall not be affected by any notice to the contrary which
may be received by it within three Business Days prior to such date.

SECTION 1306.  Trustee Not Fiduciary for Holders of Senior Indebtedness.

     The Trustee shall not be deemed to owe any fiduciary duty to the holders of
Senior Indebtedness and shall not be liable to any such holders if it shall in
good faith mistakenly pay over or distribute to holders of Securities or to the
Company or to any other Person cash, property or securities to which any holders
of Senior Indebtedness shall be entitled by virtue of this Article or otherwise.

     With respect to the holders of Senior Indebtedness, the Trustee undertakes
to perform or to observe only such of its covenants or obligations as are
specifically set forth in this Article and no implied covenants or obligations
with respect to holders of Senior Indebtedness shall be read into this Indenture
against the Trustee.

SECTION 1307.  Rights of Trustee as Holder of Senior Indebtedness;
               Preservation of Trustee's Rights.

     The Trustee in its individual capacity shall be entitled to all the rights
set forth in this Article with respect to any Senior Indebtedness which may at
any time be held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder.

     Nothing in this Article shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 607.

SECTION 1308.  Article Applicable to Paying Agents.

     In case at any time any Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article shall in such case (unless the context otherwise requires)
be construed as extending to and including such Paying Agent within its meaning
as fully for all intents and purposes as if such Paying Agent were named in this
Article in addition to or in place of the Trustee; provided, however, that
Sections 1305, 1306 and 1307 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

                                   ARTICLE 14

                               Change of Control

SECTION 1401.  Change of Control.

     (a) Within 30 days of the occurrence of a Change of Control, the Company
will be required to mail an Offer with respect to an Offer to Purchase all
Outstanding Securities at the Purchase Price thereof (provided, however, that
installments of interest whose Stated Maturity is on or prior to the Purchase
Date shall be payable to the Holders of such Securities, or one or more
Predecessor Securities, registered as

                                       63

<PAGE>   74

such at the close of business on the relevant Record Dates according to their
terms and the provisions of Section 307). Each Holder shall be entitled to
tender all or any portion of the Securities owned by such Holder pursuant to the
Offer to Purchase, subject to the requirement that any portion of a Security
tendered must be tendered in an integral multiple of $1.00 principal amount.

     (b) The Company and the Trustee shall perform their respective obligations
specified in the Offer for an Offer to Purchase. Subject to Article 13 and
Section 1403 hereof, prior to the Purchase Date, the Company shall (i) accept
for payment all Securities or portions thereof tendered pursuant to the Offer,
(ii) deposit with the Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 1003) money
sufficient to pay the purchase price of all Securities or portions thereof so
accepted and (iii) deliver or cause to be delivered to the Trustee all
Securities so accepted together with an Officers' Certificate stating the
Securities or portions thereof accepted for payment by the Company. The Paying
Agent shall promptly mail or deliver to Holders of Securities so accepted
payment in an amount equal to the purchase price, and the Trustee shall promptly
authenticate and mail or deliver to such Holders a new Security or Securities
equal in principal amount to any unpurchased portion of the Security surrendered
as requested by the Holder. Any Security not accepted for payment shall be
promptly mailed or delivered by the Company to the Holder thereof. The Company
shall publicly announce the results of the Offer on or as soon as practicable
after the Purchase Date.

     (c) Any Offer to Purchase shall be governed by and effected in accordance
with the Offer for such Offer to Purchase.

SECTION 1402.  Certain Definitions.

     For purposes of this Article 14,

     (1) "beneficial owner" shall be determined in accordance with Rule 13d-3,
as in effect on the date of the original execution of this Indenture,
promulgated by the Commission pursuant to the Exchange Act;

     (2) a "Change of Control" shall be deemed to have occurred (unless the
Company is discharged from its obligations with respect to the Securities in
accordance with Article 4) at the time, after the original issuance of the
Securities, of: (i) an event or series of events by which any Person or other
entity or Group of Persons (other than a Permitted Holder) (such Person or Group
of Persons, an "Acquiror") shall, as a result of (A) a tender or exchange offer,
open market purchases or privately negotiated purchases, or (B) a merger,
consolidation, or otherwise, have become the beneficial owner of more than 50%
of the aggregate voting power of all classes of Voting Stock of the Company; or
(ii) the Company is consolidated with or merged into another corporation with
the effect that immediately after such transaction the shareholders of the
Company immediately prior to such transaction beneficially own less thana
majority of the voting power of all classes of Voting Stock of the Person
surviving such transaction, and the Acquiror beneficially owns more than a
majority of the voting power of all classes of Voting Stock of the Person
surviving such transaction;

     (3) "Offer" has the meaning specified in the definition of Offer to
Purchase.

     (4) "Offer Expiration Date" has the meaning specified in the definition of
Offer to Purchase.

                                       64

<PAGE>   75

     (5) "Offer to Purchase" means a written offer (the "Offer") sent by the
Company by first class mail, postage prepaid, to each Holder at its address
appearing in the Securities Register on the date of the Offer. Unless otherwise
required by applicable law, the Offer shall specify an expiration date (the
"Offer Expiration Date") of the Offer to Purchase which shall be, subject to any
contrary requirements of applicable law, not less than 30 days or more than 60
days after the date of such Offer and a settlement date (the "Purchase Date")
for purchase of Securities within five Business Days after the Offer Expiration
Date; provided that, if the Offer Expiration Date occurs during a Deferral
Period, the Purchase Date shall be the fifth Business Day after the termination
of the Deferral Period. The Company shall notify the Trustee at least 15
Business Days (or such shorter period as is acceptable to the Trustee) prior to
the mailing of the Offer of the Company's obligation to make an Offer to
Purchase, and the Offer shall be mailed by the Company or, at the Company's
request, by the Trustee in the name and at the expense of the Company. The Offer
shall contain information concerning the business of the Company and its
Subsidiaries which the Company in good faith believes will enable such Holders
to make an informed decision with respect to the Offer to Purchase. The Offer
shall contain all instructions and materials necessary to enable such Holders to
tender Securities pursuant to the Offer to Purchase. The Offer shall also state:

          (A) the Offer Expiration Date, the Purchase Date and, if applicable,
     the Deferral Period;

          (B) the Purchase Price;

          (C) that the Holder may tender all or any portion of the Securities
     registered in the name of such Holder and that any portion of a Security
     tendered must be tendered in an integral multiple of $1.00 principal
     amount;

          (D) the place or places where Securities are to be surrendered for
     tender pursuant to the Offer to Purchase;

          (E) that interest (including Deferral Period Interest) on any Security
     not tendered or tendered but not purchased by the Company pursuant to the
     Offer to Purchase will continue to accrue;

          (F) that, subject to any Deferral Period, on the Purchase Date
     the Purchase Price will become due and payable upon each Security being
     accepted for payment pursuant to the Offer to Purchase and that interest
     thereon shall cease to accrue on and after the Purchase Date;

          (G) that each Holder electing to tender a Security pursuant to the
     Offer to Purchase will be required to surrender such Security at the place
     or places specified in the Offer prior to the close of business on the
     Offer Expiration Date (such Security being, if the Company or the Trustee
     so requires, duly endorsed by, or accompanied by a written instrument of
     transfer in form satisfactory to the Company and the Trustee duly executed
     by, the Holder thereof or his attorney duly authorized in writing);

          (H) that Holders will be entitled to withdraw all or any portion of
     Securities tendered if the Company (or the Paying Agent) receives, not
     later than the close of business on the Offer Expiration Date a telegram,
     telex, facsimile transmission or letter setting forth

                                       65

<PAGE>   76

     the name of the Holder, the principal amount of the Security the Holder
     tendered, the certificate number of the Security the Holder tendered and a
     statement that such Holder is withdrawing all or a portion of its tender;

          (I) that, subject to the Deferral Period, if Securities in an
     aggregate principal amount less than or equal to the Purchase Amount are
     duly tendered and not withdrawn pursuant to the Offer to Purchase, the
     Company shall purchase all such Securities; and

          (J) that in the case of any Holder whose Security is purchased only in
     part, the Company shall execute, and the Trustee shall authenticate and
     deliver to the Holder of such Security without service charge, a new
     Security or Securities, of any authorized denomination as requested by such
     Holder, in an aggregate principal amount equal to and in exchange for the
     unpurchased portion of the Security so tendered.

     (6) "Person" or "Group of Persons" shall include any syndicate or group
which would be deemed to be a "person" under Section 13(d)(3) of the Exchange
Act, as in effect on the date of the original execution of this Indenture.

     (7) "Purchase Price" means the sum of (x) the present value of the
remaining scheduled payments of principal and interest of the Securities (not
including the portion of any such payments of interest accrued as of the
Purchase Date) discounted to the Purchase Date on a semi-annual basis (assuming
a 360-day year consisting of twelve 30-day months) at 16% per annum plus (y)
interest thereon, if any, accrued as of the Purchase Date.

SECTION 1403.  Deferral Period

     Notwithstanding the provisions of Sections 1401 and 1402 hereof, during a
Deferral Period, the Company shall not be required to accept for payment or
purchase any Securities tendered pursuant to an Offer. A Holder whose Securities
have been tendered pursuant to an Offer may not withdraw its Securities during
the Deferral Period.

                                _______________

     This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.

                                       66

<PAGE>   77

     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed, all as of the day and year first above written.

                                        PHILIP SERVICES CORPORATION

                                        By: /s/ P.C. Widman
                                            ------------------------------------
                                            Name:  Phillip Widman
                                            Title: Executive Vice President and
                                                   Chief Financial Officer

                                        WILMINGTON TRUST COMPANY

                                        By: /s/ James D. Nesci
                                            ------------------------------------
                                            Name:  James D. Nesci
                                            Title: Authorized Signer

                                       67<PAGE>   1

                                                                   EXHIBIT 10.12

                                                                  Conformed Copy

          -------------------------------------------------------------

                           PHILIP SERVICES CORPORATION

                                       TO

                            WILMINGTON TRUST COMPANY

                                     Trustee

                                    Indenture

                            Dated as of April 7, 2000

                                   $18,000,000

              3% Convertible Subordinated Notes due April 15, 2020

          -------------------------------------------------------------

<PAGE>   2

                           PHILIP SERVICES CORPORATION

               Reconciliation and tie between Trust Indenture Act
                of 1939 and Indenture, dated as of April 7, 2000

<TABLE>
<CAPTION>
Trust Indenture                                                                Indenture
  Act Section                                                                   Section
  -----------                                                                   -------
<S>                                                                            <C>
  ss.310(a)(1)   .........................................................        609
        (a)(2)   .........................................................        609
        (a)(3)   .........................................................        Not Applicable
        (a)(4)   .........................................................        Not Applicable
        (b)      .........................................................        608
                 .........................................................        610
  ss.311(a)      .........................................................        613
        (b)      .........................................................        613
  ss.312(a)      .........................................................        701
                 .........................................................        702
        (b)      .........................................................        702
        (c)      .........................................................        702
        (b)      .........................................................        703
        (c)      .........................................................        703
        (d)      .........................................................        703
  ss.314(a)      .........................................................        704
        (a)(4)   .........................................................        1020
        (b)      .........................................................        Not Applicable
        (c)(1)   .........................................................        102
        (c)(2)   .........................................................        102
        (c)(3)   .........................................................        Not Applicable
        (d)      .........................................................        Not Applicable
        (e)      .........................................................        102
  ss.315(a)      .........................................................        601
        (b)      .........................................................        602
        (c)      .........................................................        601
        (d)      .........................................................        601
        (d)(1)   .........................................................        601
        (e)      .........................................................        514
</TABLE>

                                        i

<PAGE>   3

<TABLE>
<CAPTION>
Trust Indenture                                                                 Indenture
 Act Section                                                                     Section
 -----------                                                                     -------
<S>                                                                               <C>
  ss.316(a)                                                                          101
        (a)(l)(A)   .........................................................        502
                    .........................................................        512
        (a)(l)(B)   .........................................................        513
        (a)(2)      .........................................................        Not Applicable
        (b)         .........................................................        508
  ss.317(a)(1)      .........................................................        503
        (a)(2)      .........................................................        504
        (b)         .........................................................        1003
  ss.318(a)         .........................................................        107
</TABLE>

----------
Note:    This reconciliation and tie shall not, for any purpose, be deemed to be
         a part of the Indenture.

                                       ii

<PAGE>   4

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                          Page
                                                                                          ----
<S>                                                                                       <C>
                                    ARTICLE 1

                        Definitions and Other Provisions
                             of General Application

SECTION 101. Definitions.................................................................  1
Act......................................................................................  2
Affiliate................................................................................  2
Asset Disposition........................................................................  2
Authenticating Agent.....................................................................  2
Authority................................................................................  2
Bank.....................................................................................  3
beneficial owner.........................................................................  3
Board of Directors.......................................................................  3
Board Resolution.........................................................................  3
Business Day.............................................................................  3
Capital Stock............................................................................  3
Change of Control........................................................................  3
Closing Price Per Share..................................................................  3
Commission...............................................................................  3
Common Shares............................................................................  3
Common Stock.............................................................................  4
Company..................................................................................  4
Company Request..........................................................................  4
Company Order............................................................................  4
Consolidated Net Income..................................................................  4
Constituent Person.......................................................................  4
Conversion Agent.........................................................................  4
Conversion Date..........................................................................  4
Conversion Price.........................................................................  4
Corporate Trust Office...................................................................  4
corporation..............................................................................  4
Credit Agreement.........................................................................  5
Defaulted Interest.......................................................................  5
Deferral Period..........................................................................  5
Deferral Period Interest.................................................................  5
Deferred Interest........................................................................  5
Definitive Security......................................................................  5
Dollars..................................................................................  5
$........................................................................................  5
</TABLE>

----------
Note:    This table of contents shall not, for any purpose, be deemed to be a
         part of the Indenture.

                                       iii

<PAGE>   5

<TABLE>
<CAPTION>
                                                                                          Page
                                                                                          ----
<S>                                                                                       <C>
Event of Default.......................................................................    5
Exchange Act...........................................................................    5
Exit Facility..........................................................................    5
Expiration Date........................................................................    5
generally accepted accounting principles...............................................    5
Holder.................................................................................    5
Indenture..............................................................................    6
Initial Exit Facility..................................................................    6
Interest Payment Date..................................................................    6
Maturity...............................................................................    6
Nasdaq.................................................................................    6
Notice of Default......................................................................    6
Non-electing Share.....................................................................    6
NYSE...................................................................................    6
Offer..................................................................................    6
Offer Expiration Date..................................................................    6
Offer to Purchase......................................................................    6
Officers' Certificate..................................................................    6
Opinion of Counsel.....................................................................    6
Outstanding............................................................................    6
Paying Agent...........................................................................    7
Permitted Holder.......................................................................    7
Plan...................................................................................    7
Person.................................................................................    7
Predecessor Security...................................................................    7
Purchase Date..........................................................................    7
Purchase Price.........................................................................    7
Redeemable Stock.......................................................................    8
Redemption Change of Control...........................................................    8
Redemption Date........................................................................    8
Redemption Price.......................................................................    8
Reference Date.........................................................................    8
Regular Record Date....................................................................    8
Responsible Officer....................................................................    8
Securities.............................................................................    8
Security...............................................................................    8
Securities Act.........................................................................    8
Security Register......................................................................    9
Security Registrar.....................................................................    9
Senior Indebtedness....................................................................    9
Significant Subsidiary.................................................................    9
Special Record Date....................................................................    9
Stated Maturity........................................................................    9
Subordinated Notes.....................................................................    9
Subsidiary.............................................................................    9
</TABLE>

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                                       iv

<PAGE>   6

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Successor Security.....................................................................     9
Tendered Security......................................................................     9
Trading Days...........................................................................     9
Trust Indenture Act....................................................................    10
Trustee................................................................................    10
United States..........................................................................    10
Vice President.........................................................................    10
Voting Stock...........................................................................    10
Wholly Owned Subsidiary................................................................    10
SECTION 102. Compliance Certificates and Opinions......................................    10
SECTION 103. Form of Documents Delivered to Trustee....................................    11
SECTION 104. Acts of Holders; Record Date..............................................    11
SECTION 105. Notices. Etc., to Trustee and Company.....................................    13
SECTION 106. Notice to Holders: Waiver.................................................    13
SECTION 107. Conflict with Trust Indenture Act.........................................    14
SECTION 108. Effect of Headings and Table of Contents..................................    14
SECTION 109. Successors and Assigns....................................................    14
SECTION 110. Separability Clause.......................................................    14
SECTION 111. Benefits of Indenture.....................................................    14
SECTION 112. Governing Law.............................................................    15
SECTION 113. Legal Holidays............................................................    15
SECTION 114. No Recourse Against Others................................................    15
SECTION 115. Multiple Originals........................................................    15

                                    ARTICLE 2

                                 Security Forms

SECTION 201. Forms Generally...........................................................    15
SECTION 202. Form of Face of Security..................................................    16
SECTION 203. Form of Reverse of Security...............................................    18
SECTION 204. Form of Trustee's Certificate of Authentication...........................    22
SECTION 205. Form of Conversion Notice.................................................    22

                                    ARTICLE 3

                                 The Securities

SECTION 301. Title and Terms...........................................................    22
SECTION 302. Denominations.............................................................    23
SECTION 303. Execution, Authentication, Delivery and Dating............................    23
SECTION 304. Temporary Securities......................................................    24
SECTION 305. Registration, Registration of Transfer and Exchange.......................    25
SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities..........................    25
SECTION 307. Payment of Interest; Interest Rights Preserved............................    26
SECTION 308. Persons Deemed Owners.....................................................    27
SECTION 309. Cancellation..............................................................    28
SECTION 310. Computation of Interest...................................................    28
</TABLE>

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<PAGE>   7

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                                    ARTICLE 4

                           Satisfaction and Discharge

SECTION 401. Satisfaction and Discharge of Indenture..................................     28
SECTION 402. Application of Trust Money...............................................     29

                                    ARTICLE 5

                                    Remedies

SECTION 501. Events of Default........................................................     30
SECTION 502. Acceleration of Maturity; Rescission and Annulment.......................     31
SECTION 503. Collection of Indebtedness and Suits for Enforcement by Trustee..........     32
SECTION 504. Trustee May File Proofs of Claim.........................................     33
SECTION 505. Trustee May Enforce Claims Without Possession of Securities..............     33
SECTION 506. Application of Money Collected...........................................     33
SECTION 507. Limitation on Suits......................................................     34
SECTION 508. Unconditional Right of Holders to Receive Principal and Interest.........     35
SECTION 509. Restoration of Rights and Remedies.......................................     35
SECTION 510. Rights and Remedies Cumulative...........................................     35
SECTION 511. Delay or Omission Not Waiver.............................................     35
SECTION 512. Control by Holders.......................................................     36
SECTION 513. Waiver of Past Defaults..................................................     36
SECTION 514. Undertaking for Costs....................................................     36
SECTION 515. Waiver of Stay or Extension Laws.........................................     36

                                    ARTICLE 6

                                   The Trustee

SECTION 601. Certain Duties and Responsibilities......................................     37
SECTION 602. Notice of Defaults.......................................................     38
SECTION 603. Certain Rights of Trustee................................................     38
SECTION 604. Not Responsible for Recitals or Issuance of Securities...................     39
SECTION 605. May Hold Securities......................................................     39
SECTION 606. Money Held in Trust......................................................     39
SECTION 607. Compensation and Reimbursement...........................................     39
SECTION 608. Disqualification: Conflicting Interests..................................     40
SECTION 609. Corporate Trustee Required; Eligibility..................................     40
SECTION 610. Resignation and Removal; Appointment of Successor........................     40
SECTION 611. Acceptance of Appointment by Successor...................................     41
SECTION 612. Merger, Conversion, Consolidation or Succession to Business..............     42
SECTION 613. Preferential Collection of Claims Against Company........................     42
SECTION 614. Appointment of Authenticating Agent......................................     42
</TABLE>

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                                    ARTICLE 7

                Holders' Lists and Reports by Trustee and Company

SECTION 701. Company to Furnish Trustee Names and Addresses of Holders.................    44
SECTION 702. Preservation of Information; Communications to Holders....................    44
SECTION 703. Reports by Trustee........................................................    44
SECTION 704. Reports by Company........................................................    45

                                    ARTICLE 8

              Consolidation, Merger, Conveyance, Transfer or Lease

SECTION 801. Company May Consolidate, Etc. Only on Certain Terms.......................    45
SECTION 802. Successor Substituted.....................................................    45

                                    ARTICLE 9

                             Supplemental Indentures

SECTION 901. Supplemental Indentures Without Consent of Holders........................    46
SECTION 902. Supplemental Indentures with Consent of Holders...........................    46
SECTION 903. Execution of Supplemental Indentures......................................    47
SECTION 904. Effect of Supplemental Indentures.........................................    47
SECTION 905. Conformity with Trust Indenture Act.......................................    47
SECTION 906. Reference in Securities to Supplemental Indentures........................    48

                                   ARTICLE 10

                                    Covenants

SECTION 1001. Payment of Principal and Interest........................................    48
SECTION 1002. Maintenance of Office or Agency..........................................    48
SECTION 1003. Money for Security Payments to be Held in Trust..........................    48
SECTION 1004. Existence................................................................    49
SECTION 1005. Maintenance of Properties................................................    50
SECTION 1006. Payment of Taxes and Other Claims........................................    50
SECTION 1007. Registration and Listing.................................................    50
SECTION 1008. Limitation on Restricted Payments........................................    51
SECTION 1009. Limitation on Dividend and Other Payment Restrictions
              Affecting Subsidiaries...................................................    52
SECTION 1010. Limitation on Distributions of Assets to Shareholders....................    52
SECTION 1011. Statement By Officers as to Default; Compliance Certificates.............    53
SECTION 1012. Waiver of Certain Covenants..............................................    53
SECTION 1013. Indemnification of Judgment Currency.....................................    53
SECTION 1014. Available Information....................................................    54
SECTION 1015. Acquisition of Securities................................................    54
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                                   ARTICLE 11

                            Redemption of Securities

SECTION 1101. Right of Redemption......................................................    54
SECTION 1102. Applicability of Article.................................................    54
SECTION 1103. Notices to Trustee.......................................................    54
SECTION 1104. Selection by Trustee of Securities to Be Redeemed........................    55
SECTION 1105. Notice of Redemption.....................................................    55
SECTION 1106. Deposit of Redemption Price..............................................    56
SECTION 1107. Securities Payable on Redemption Date....................................    56
SECTION 1108. Securities Redeemed in Part..............................................    56

                                   ARTICLE 12

                            Conversion of Securities

SECTION 1201. Conversion Privilege and Conversion Price................................    57
SECTION 1202. Exercise of Conversion Privilege.........................................    57
SECTION 1203. Fractions of Shares......................................................    58
SECTION 1204. Adjustment of Conversion Price...........................................    58
SECTION 1205. Notice of Adjustments of Conversion Price................................    60
SECTION 1206. Notice of Certain Corporate Action.......................................    60
SECTION 1207. Company to Reserve Common Shares.........................................    61
SECTION 1208. Taxes on Conversions.....................................................    61
SECTION 1209. Covenant as to Common Shares.............................................    61
SECTION 1210. Cancellation of Converted Securities.....................................    62
SECTION 1211. Provision in Case of Consolidation, Merger or Sale of Assets.............    62
SECTION 1212. Issuance of Rights, Options or Warrants..................................    62
SECTION 1213. Responsibility of Trustee................................................    63

                                   ARTICLE 13

                           Subordination of Securities

SECTION 1301. Securities Subordinated to Senior Indebtedness...........................    63
SECTION 1302. No Payments in Certain Circumstances;
              Payment Over of Proceeds Upon Dissolution, Etc...........................    64
SECTION 1303. Notice to Trustee of Specified Events;
              Reliance on Certificate of Liquidating Agent.............................    65
SECTION 1304. Trustee to Effectuate Subordination......................................    66
SECTION 1305. Trustee Not Charged with Knowledge of Prohibition........................    66
SECTION 1306. Trustee Not Fiduciary for Holders of Senior Indebtedness.................    67
SECTION 1307. Rights of Trustee as Holder of Senior Indebtedness;
              Preservation of Trustee's Rights.........................................    67
SECTION 1308. Article Applicable to Paying Agents......................................    67
SECTION 1309. Certain Conversions Deemed Payment.......................................    67
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                                   ARTICLE 14

                                Change of Control

     SECTION 1401. Change of Control...................................................    68
     SECTION 1402. Certain Definitions.................................................    68
     SECTION 1403. Deferral Period.....................................................    71

RECITALS OF THE COMPANY................................................................     1

TESTIMONIUM

SIGNATURES
                                     ANNEXES

Annex A-1     Form of Conversion Notice                                                 A-1-1
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                                       ix

<PAGE>   11

         INDENTURE, dated as of April 7, 2000 between Philip Services
Corporation, a corporation duly organized and existing under the laws of
Delaware (herein called the "Company"), having its principal office at 100 King
Street West, Hamilton, Ontario, Canada L8N 4T6 and Wilmington Trust Company, a
banking corporation duly organized and existing under the laws of the State of
Delaware, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

         The Company has duly authorized the creation of an issue of its 3%
Convertible Subordinated Notes due April 15, 2020 of substantially the tenor and
amount hereinafter set forth, and to provide therefor the Company has duly
authorized the execution and delivery of this Indenture.

         All things necessary to make the Securities, when executed by the
Company and authenticated and delivered hereunder and duly issued by the
Company, the valid obligations of the Company, and to make this Indenture a
valid agreement of the Company, in accordance with their and its terms, have
been done.

         NOW, THEREFORE, THIS INDENTURE WITNESSETH:

         For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:

                                    ARTICLE 1

                        Definitions and Other Provisions
                             of General Application

SECTION 101. Definitions.

         For all purposes of this Indenture, except as otherwise expressly
provided or unless the context otherwise requires:

                  (1) the terms defined in this Article have the meanings
         assigned to them in this Article and include the plural as well as the
         singular;

                  (2) all other terms used herein which are defined in the Trust
         Indenture Act, either directly or by reference therein, have the
         meanings assigned to them therein;

                  (3) all accounting terms not otherwise defined herein have the
         meanings assigned to them in accordance with generally accepted
         accounting principles in the United States (whether or not such is
         indicated herein), and, except as otherwise herein expressly provided,
         the term "generally accepted accounting principles" with respect to any
         computation required or permitted hereunder shall mean such accounting
         principles as are

                                       1

<PAGE>   12

         generally accepted in the United States as consistently applied by the
         Company at the date of such computation;

                  (4) unless the context otherwise requires, any reference to an
         "Article" or a "Section", or to an "Annex" or a "Schedule", refers to
         an Article or Section of, or to an Annex or a Schedule attached to,
         this Indenture, as the case may be;

                  (5) unless the context otherwise requires, any reference to a
         statute, rule or regulation refers to the same (including any successor
         statute, rule or regulation thereto) as it may be amended from time to
         time;

                  (6) unless otherwise specifically set forth herein, all
         calculations or determinations of a Person shall be performed or made
         on a consolidated basis in accordance with generally accepted
         accounting principles; and

                  (7) the words "herein", "hereof" and "hereunder" and other
         words of similar import refer to this Indenture as a whole and not to
         any particular Article, Section or other subdivision.

         "Act", when used with respect to any Holder, has the meaning specified
in Section 104.

         "Affiliate" of any Person means any other Person directly or indirectly
controlling or controlled by or under direct or indirect common control with
such Person. For the purposes of this definition, "control" when used with
respect to any Person means the power to direct the management and policies of
such Person, directly or indirectly, whether through the ownership of voting
securities, by contract or otherwise; and the terms "controlling" and
"controlled" have meanings correlative to the foregoing.

         "Asset Disposition" means any transfer, conveyance, sale, lease or
other disposition by the Company or any of its Subsidiaries (including a
consolidation or merger or other sale of any such Subsidiary with, into or to
another Person in a transaction in which such Subsidiary ceases to be a
Subsidiary, but excluding a disposition by a Subsidiary of the Company to the
Company or a Wholly Owned Subsidiary of the Company or by the Company to a
Wholly Owned Subsidiary of the Company) of (i) shares of Capital Stock (other
than directors' qualifying shares) or other ownership interests of a Subsidiary
of the Company, (ii) substantially all of the assets of the Company or any of
its Subsidiaries representing a division or line of business or (iii) other
assets or rights of the Company or any of its Subsidiaries outside of the
ordinary course of business, provided in each of the foregoing instances that
the aggregate consideration for such transfer, conveyance, sale, lease or other
disposition is equal to $10 million or more.

         "Authenticating Agent" means any Person authorized by the Trustee
pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities.

         "Authority" means any federal, state, provincial, municipal, or local
government or quasi-governmental agency or authority.

                                        2

<PAGE>   13

         "Bank" means a "bank" as defined in section 3(a)(6) of the Exchange Act
as well as any other financial institution, foreign or otherwise, a substantial
portion of the business of which consists of receiving deposits or exercising a
fiduciary power similar to those permitted to national banks under the authority
of the Comptroller of the Currency pursuant to the first section of Public Law
87-722.

         "beneficial owner" has the meaning specified in Section 1402(1).

         "Board of Directors" means either the board of directors of the Company
or any duly authorized committee of that board authorized to act for it in
respect hereof.

         "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

         "Business Day" means each Monday, Tuesday, Wednesday, Thursday and
Friday which is not a day on which banking institutions in The City of New York,
New York or Wilmington, Delaware are authorized or obligated by law or executive
order to close.

         "Capital Stock" of any Person means any and all shares, interests,
participations or other equivalents (however designated) of corporate stock or
other equity participations, including partnership interests, whether general or
limited, of such Person.

         "Change of Control" has the meaning specified in Section 1402(2).

         "Closing Price Per Share" means, with respect to a class of Common
Stock of the Company, for any day, the reported last sales price regular way per
share of such class or, in case no such reported sale takes place on such day,
the average of the reported closing bid and asked prices regular way, in either
case (i) on the NYSE or, if such class of Common Stock is not quoted, listed or
admitted to trading on the NYSE, on the principal (as determined by the
Company's Board of Directors) United States or Canadian national securities
exchange or Nasdaq on which such class of Common Stock is quoted, listed or
admitted to trading or (ii) if not quoted on the NYSE or listed or admitted to
trading on any United States or Canadian national securities exchange or Nasdaq,
the average of the closing bid and asked prices in the over-the-counter market
as furnished by any New York Stock Exchange member firm selected from time to
time by the Company for that purpose or (iii) if not so available in either
manner set forth in (i) or (ii), as otherwise determined in good faith by the
Board of Directors.

         "Commission" means the United States Securities and Exchange
Commission, as from time to time constituted, created under the Exchange Act,
or, if at any time after the execution of this instrument such Commission is not
existing and performing the duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.

         "Common Shares" means the shares of Common Stock , $0.01 par value per
share, of the Company authorized at the date of this instrument as originally
executed. Subject to the provisions of Section 1211, shares issuable upon
conversion of Securities shall include only Common Shares or shares of any class
or classes of Common Stock resulting from any

                                        3

<PAGE>   14

reclassification thereof; provided, however, that if at any time as a result of
such reclassification there shall be more than one such resulting class, the
shares so issuable upon conversion of Securities shall include shares of all
such classes, and the number of shares of each such class then so issuable shall
be in the same proportion which the total number of shares of such class
resulting from such reclassification bears to the total number of shares of such
classes resulting from such reclassification.

         "Common Stock" means the Common Shares, together with any other class
of capital stock of the Company which has no preference in respect of dividends
or of amounts payable in the event of any voluntary or involuntary liquidation,
dissolution or winding up of the Company and which is not subject to redemption
by the Company.

         "Company" means the Person named as the "Company" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture and thereafter "Company"
shall mean such successor Person.

         "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman of the Board, its President or
a Vice President, and by its Vice President, Finance, its Treasurer, an
Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered to
the Trustee.

         "Consolidated Net Income" for any period means the consolidated net
income (or loss) of the Company and its Subsidiaries for such period determined
on a consolidated basis in accordance with generally accepted accounting
principles; provided that there shall be excluded therefrom (a) gains or losses
on Asset Dispositions by the Company or its Subsidiaries, (b) all extraordinary
gains and extraordinary losses, and (c) the tax effect of any of the items
described in clauses (a) and (b) above.

         "Constituent Person" has the meaning specified in Section 1211.

         "Conversion Agent" means any Person authorized by the Company to
convert Securities in accordance with Article Thirteen. The Company has
initially appointed the Trustee as its Conversion Agent in the Borough of
Manhattan, The City of New York.

         "Conversion Date" has the meaning specified in Section 1202.

         "Conversion Price" has the meaning specified in Section 1201.

         "Corporate Trust Office" means the office of the Trustee in the City of
Wilmington, Delaware, which office at the date of this Indenture is located at
Rodney Square North, 1100 North Market Street, Wilmington, Delaware 19890,
Attention: Corporate Trust Administration, at which at any particular time its
corporate trust business may be administered.

         "corporation" means a corporation, association, company, joint-stock
company, limited liability company, partnership or business trust.

                                                4

<PAGE>   15

         "Credit Agreement" means the Secured PIK/Term Credit Agreement, dated
as of April 7, 2000, among the Company, Subsidiaries of the Company named
therein, Canadian Imperial Bank of Commerce as administrative agent and the
various persons from time to time parties to such agreement as lenders providing
for the PIK Loans and the Term Loans (as such terms are defined in such
agreement), as the same may be amended, renewed, extended, refinanced, replaced
or refunded from time to time, together with any documents entered into in
connection therewith, including collateral agency and intercreditor agreements.

         "Defaulted Interest" has the meaning specified in Section 307.

         "Deferral Period", in connection with a Change of Control, means the
period commencing on the date of the Indenture and ending on the earliest to
occur of (i) the stated maturity of the Initial Exit Facility; (ii) the
acceleration of amounts due under the Initial Exit Facility and written notice
of which is received by the Trustee; and (iii) the refinancing or replacement of
the Initial Exit Facility, which refinancing or replacement is consummated
substantially concurrently with the Change of Control and written notice of
which is received by the Trustee.

         "Deferral Period Interest" has the meaning specified in Section 301.

         "Deferred Interest" has the meaning specified in Section 301.

         "Definitive Security" means any Security other than a Global Security.

         "Dollars" and "$" means such coins or currency of the United States of
America which is legal tender for payment of public and private debts.

         "Event of Default" has the meaning specified in Section 501.

         "Exchange Act" refers to the Securities Exchange Act of 1934 as it may
be amended and any successor act thereto.

         "Exit Facility" means the loan agreement, dated as of April 7, 2000,
among the Company, Subsidiaries of the Company named therein, Foothill Capital
Corporation as arranger and administrative agent, and the various persons from
time to time party to such agreement as lenders, as the same may be amended,
renewed, extended, refinanced, replaced or refunded from time to time, together
with any documents entered into in connection therewith, including collateral
agency and intercreditor agreements.

         "Expiration Date" has the meaning specified in Section 104.

         "generally accepted accounting principles" means, as at any date of
determination, generally accepted accounting principles in the United States
(unless otherwise indicated) and which are applicable as of the date of
determination.

         "Holder" means a Person in whose name a Security is registered in the
Security Register.

                                        5

<PAGE>   16

         "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof
including, for all purposes of this instrument and any such supplemental
indenture, the Annexes attached to this instrument.

         "Initial Exit Facility" means the Exit Facility as executed on April 7,
2000, which facility has a stated maturity of September 30, 2002.

         "Interest Payment Date" means the Stated Maturity of an instalment of
interest on the Securities.

         "Maturity", when used with respect to any Security, means the date on
which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption or otherwise.

         "Nasdaq" means the Nasdaq National Market and The Nasdaq SmallCap
Market.

         "Notice of Default" means a written notice of the kind specified in
Section 501(5).

         "Non-electing Share" has the meaning specified in Section 1211.

         "NYSE" means the New York Stock Exchange.

         "Offer" has the meaning specified in Section 1402(3).

         "Offer Expiration Date" has the meaning specified in Section 1402(4).

         "Offer to Purchase" has the meaning specified in Section 1402(5).

         "Officers' Certificate" means a certificate signed by the Chairman of
the Board, the President or a Vice President, and by the Treasurer, an Assistant
Treasurer, the Secretary or an Assistant Secretary, of the Company, and
delivered to the Trustee.

         "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company, and who shall be acceptable to the Trustee.

         "Outstanding", when used with respect to Securities, means, as of the
date of determination, all Securities theretofore authenticated and delivered
under this Indenture, except:

                  (i) Securities theretofore cancelled by the Trustee or
         delivered to the Trustee for cancellation;

                  (ii) Securities for whose payment or redemption money in the
         necessary amount has been theretofore deposited with the Trustee or any
         Paying Agent (other than the Company) in trust or set aside and
         segregated in trust by the Company (if the Company shall act as its own
         Paying Agent) for the Holders of such Securities; provided that, if
         such Securities are

                                        6

<PAGE>   17

         to be redeemed, notice of such redemption has been duly given pursuant
         to this Indenture or provision therefor satisfactory to the Trustee has
         been made; and

                  (iii) Securities which have been paid pursuant to Section 306
         or in exchange for or in lieu of which other Securities have been
         authenticated and delivered pursuant to this Indenture, other than any
         such Securities in respect of which there shall have been presented to
         the Trustee proof satisfactory to it that such Securities are held by a
         bona fide purchaser in whose hands such Securities are valid
         obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities are present or have given any
request, demand, authorization, direction, notice, consent or waiver hereunder,
Securities owned by the Company or any other obligor upon the Securities or any
Affiliate of the Company or of such other obligor shall be disregarded and
deemed not to be Outstanding, except that, in determining whether the Trustee
shall be protected in relying upon any such determination as to the presence of
a quorum or any such request, demand, authorization, direction, notice, consent
or waiver or other action, only Securities which the Trustee knows to be so
owned shall be so disregarded. Securities so owned which have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

         "Paying Agent" means any Person authorized by the Company to pay the
principal of or interest on any Securities on behalf of the Company.

         "Permitted Holder" means any Person that beneficially owns more than
10% of the outstanding Common Shares as of the date of this Indenture, after
giving effect to the distributions of Common Shares under the Plan.

         "Plan" means the First Amended Joint Plan of Reorganization of Philip
Services (Delaware), Inc., et al , dated September 21, 1999, in the United
States Bankruptcy Court for the District of Delaware.

         "Person" means any individual, corporation, partnership, joint venture,
trust, limited liability company, unincorporated organization or government or
any agency or political subdivision thereof. For purposes of Article 14,
"Person" has the meaning specified in Section 1402(6).

         "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Purchase Date" has the meaning specified in Section 1402(5).

         "Purchase Price" has the meaning specified in Section 1402(7).

                                        7

<PAGE>   18

         "Redeemable Stock" of any Person means any Capital Stock of such Person
that by its terms (or by the terms of any security into which it is convertible
or for which it is exchangeable) or otherwise (including upon the occurrence of
an event) matures or is required to be redeemed (pursuant to any sinking fund
obligation or otherwise) or is convertible into or exchangeable for indebtedness
or is redeemable at the option of the holder thereof, in whole or in part, at
any time prior to the final Stated Maturity of the Securities;

         a "Redemption Change of Control" shall be deemed to have occurred
(unless the Company is discharged from its obligations with respect to the
Securities in accordance with Article 4) at the time, after the original
issuance of the Securities, of: (i) an event or series of events by which any
Person or other entity or Group of Persons shall, as a result of (A) a tender or
exchange offer, open market purchases or privately negotiated purchases, or (B)
a merger, consolidation or otherwise, have become the beneficial owner of more
than 50% of the aggregate voting power of all classes of Voting Stock of the
Company; or (ii) the Company is consolidated with or merged into another
corporation with the effect that immediately after such transaction the
shareholders of the Company immediately prior to such transaction beneficially
own less than a majority of the voting power of all classes of Voting Stock of
the Person surviving such transaction.

         "Redemption Date", when used with respect to any Security to be
redeemed, means the date fixed for such redemption by or pursuant to this
Indenture.

         "Redemption Price", when used with respect to any Security to be
redeemed,means the price at which it is to be redeemed pursuant to this
Indenture.

         "Reference Date" has the meaning specified in Section 1204(3).

         "Regular Record Date" for the interest payable on any Interest Payment
Date means the April 1 or October 1 (whether or not a Business Day), as the case
may be, next preceding such Interest Payment Date.

         "Responsible Officer", when used with respect to the Trustee, means the
chairman or any vice-chairman of the board of directors, the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee, the president, any vice president, the secretary, any
assistant secretary, the treasurer, any assistant treasurer, the cashier, any
assistant cashier, any trust officer or assistant trust officer, the controller
or any assistant controller or any other officer of the Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate trust matter,
any other officer to whom such matter is referred because of his knowledge of
and familiarity with the particular subject.

         "Securities" or "Security" means securities designated in the first
paragraph of the RECITALS OF THE COMPANY.

         "Securities Act" means the U.S. Securities Act of 1933 and (unless the
context otherwise requires) includes the rules and regulations of the Commission
promulgated thereunder.

                                        8

<PAGE>   19

         "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

         "Senior Indebtedness" has the meaning specified in Section 1301.

         "Significant Subsidiary" means, at any date of determination, (a) any
Subsidiary of the Company that, together with any of its Subsidiaries (i) for
the most recent fiscal year of the Company accounted for more than 15% of the
consolidated revenues of the Company and its Subsidiaries or (ii) as of the end
of such fiscal year, owned more than 15% of the consolidated assets of the
Company and its Subsidiaries, all as set forth on the consolidated financial
statements of the Company and its Subsidiaries for such year prepared in
accordance with generally accepted accounting principles.

         "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 307.

         "Stated Maturity", when used with respect to any Security or any
installment of interest thereon, means the date specified in such Security as
the fixed date on which the principal of such Security or such installment of
interest is due and payable.

         "Subordinated Notes" means the 6% Subordinated Notes due April 15, 2010
of the Company.

         "Subsidiary" of any Person means (i) a corporation more than 50% of the
combined voting power of the outstanding Voting Stock of which is owned,
directly or indirectly, by such Person or by one or more other Subsidiaries of
such Person or by such Person and one or more Subsidiaries thereof, (ii) any
other Person (other than a corporation) in which such Person, or one or more
other Subsidiaries of such Person or such Person and one or more other
Subsidiaries thereof, directly or indirectly, has at least a majority ownership
and power to direct the policies, management and affairs thereof or (iii) any
other Person not described in clauses (i) and (ii) above in which such Person,
or one more other Subsidiaries of such Person or such Person and one or more
other Subsidiaries thereof, directly or indirectly, has a 50% ownership and the
power, pursuant to a written contract or agreement, to direct the policies and
management or the financial and other affairs thereof.

         "Successor Security" of any particular Security means every Security
issued after, and evidencing all or a portion of the same debt as that evidenced
by, such particular Security; and, for the purposes of this definition, any
Security authenticated and delivered under Section 306 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

         "Tendered Security" has the meaning specified in Section 301.

         "Trading Days" of a class of Common Stock means (i) if such class of
Common Stock is quoted on Nasdaq or on any United States national securities
exchange, days on which Nasdaq or such national securities exchange is open for
business; (ii) if such class of Common Stock is quoted on a system of automated
dissemination of quotations of securities prices, days on which

                                        9

<PAGE>   20

trades may be effected through such system; or (iii) if such class of Common
Stock is not listed or admitted for trading on the Nasdaq or other United States
national securities exchange or quoted on any system of automated dissemination
of quotation of securities prices, days on which such class of Common Stock is
traded regular way in the over-the-counter market and for which a closing bid
and a closing asked price for such class of Common Stock are available.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed, except as provided in
Section 905; provided, however, that in the event the Trust Indenture Act of
1939 is amended after such date, "Trust Indenture Act" means, to the extent
required by any such amendment, the Trust Indenture Act of 1939 as so amended.

         "Trustee" means the Person named as the "Trustee" in the first
paragraph of this Indenture until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean such successor Trustee.

         "United States" means the United States of America (including the
States thereof and the District of Columbia), its territories, its possessions
and other areas subject to its jurisdiction.

         "Vice President", when used with respect to the Company or the Trustee,
means any vice president, whether or not designated by a number or a word or
words added before or after the title "vice president".

         "Voting Stock" of any Person means Capital Stock of such Person which
ordinarily has voting power for the election of directors (or persons performing
similar functions) of such Person, whether at all times or only so long as no
senior class of securities has such voting power by reason of any contingency.

         "Wholly Owned Subsidiary" of any Person means a Subsidiary of such
Person all of the outstanding Capital Stock or other ownership interests of
which (other than directors' qualifying shares) shall at the time be owned by
such Person or by one or more Wholly Owned Subsidiaries of such Person or by
such Person and one or more Wholly Owned Subsidiaries of such Person.

SECTION 102. Compliance Certificates and Opinions.

         Upon any application or request by the Company to the Trustee to take
any action under any provision of this Indenture, the Company shall furnish to
the Trustee such certificates and opinions as may be required under the Trust
Indenture Act. Each such certificate or opinion shall be given in the form of an
Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirement set forth in
this Indenture.

         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include

                                       10

<PAGE>   21

                  (1) a statement that each individual signing such certificate
         or opinion has read such covenant or condition and the definitions
         herein relating thereto;

                  (2) a brief statement as to the nature and scope of the
         examination or investigation upon which the statements or opinions
         contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of each such individual,
         he has made such examination or investigation as is necessary to enable
         him to express an informed opinion as to whether or not such covenant
         or condition has been complied with (which, in the case of an Opinion
         of Counsel may be limited to reliance on an Officers' Certificate as to
         matters of fact); and

                  (4) a statement as to whether, in the opinion of each such
         individual, such condition or covenant has been complied with.

SECTION 103. Form of Documents Delivered to Trustee.

         In any case where several matters are required to be certified by, or
covered by an opinion of, any specified Person, it is not necessary that all
such matters be certified by, or covered by the opinion of, only one such
Person, or that they be so certified or covered by only one document, but one
such Person may certify or give an opinion with respect to some matters and one
or more other such Persons as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

         Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or opinion of counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.

         Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

SECTION 104. Acts of Holders; Record Date.

         Any request, demand, authorization, direction, notice, consent, waiver
or other action provided by this Indenture to be given or taken by Holders may
be embodied in and evidenced by one or more instruments of substantially similar
tenor signed by such Holders in person or by agent duly appointed in writing;
and, except as herein otherwise expressly provided, such action shall become
effective when such instrument or instruments are delivered to the Trustee and,
where it is hereby expressly required, to the Company. Such instrument or
instruments (and the action embodied therein and evidenced thereby) are herein
sometimes referred to as the "Act" of the Holders signing such instrument or
instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose

                                       11

<PAGE>   22

of this Indenture and (subject to Section 601) conclusive in favor of the
Trustee and the Company, if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by a
certificate of a notary public or other officer authorized by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a signer acting in a capacity other than his individual capacity, such
certificate or affidavit shall also constitute sufficient proof of his
authority. The fact and date of the execution of any such instrument or writing,
or the authority of the Person executing the same, may also be proved in any
other manner which the Trustee deems sufficient.

         The ownership of Securities shall be proved by the Security Register.

         Any request, demand, authorization, direction, notice, consent, waiver
or other Act of the Holder of any Security shall bind every future Holder of the
same Security and the Holder of every Security issued upon the registration of
transfer thereof or in exchange therefor or in lieu thereof in respect of
anything done, omitted or suffered to be done by the Trustee or the Company in
reliance thereon, whether or not notation of such action is made upon such
Security.

         The Company may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities entitled to give, make or take
any request, demand, authorization, direction, notice, consent, waiver or other
action provided or permitted by this Indenture to be given, made or taken by
Holders of Securities, provided that the Company may not set a record date for,
and the provisions of this paragraph shall not apply with respect to, the giving
or making of any notice, declaration, request or direction referred to in the
next paragraph. If not set by the Company prior to the first solicitation of a
Holder made by any Person in respect of any such matter referred to in the
foregoing sentence, the record date for any such matter shall be the 30th day
(or, if later, the date of the most recent list of Holders required to be
provided pursuant to Section 701) prior to such first solicitation. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities on such record date, and no other Holders, shall be entitled to take
the relevant action, whether or not such Holders remain Holders after such
record date; provided that no such action shall be effective hereunder unless
taken on or prior to the applicable Expiration Date by Holders of the requisite
principal amount of Outstanding Securities on such record date. Nothing in this
paragraph shall be construed to prevent the Company from setting a new record
date for any action for which a record date has previously been set pursuant to
this paragraph (whereupon the record date previously set shall automatically and
with no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities on the date such
action is taken. Promptly after any record date is set pursuant to this
paragraph, the Company, at its own expense, shall cause notice of such record
date, the proposed action by Holders and the applicable Expiration Date to be
given to the Trustee in writing and to each Holder of Securities in the manner
set forth in Section 106.

         The Trustee may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities entitled to join in the giving
or making of (i) any Notice of Default, (ii) any declaration of acceleration
referred to in Section 502, (iii) any request to institute proceedings referred
to in Section 507(2) or (iv) any direction referred to in Section 512. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities on such record date, and no other Holders, shall be entitled to join
in such notice, declaration, request or direction, whether or not such Holders
remain Holders after such record

                                       12

<PAGE>   23

date; provided that no such action shall be effective hereunder unless taken on
or prior to the applicable Expiration Date by Holders of the requisite principal
amount of Outstanding Securities on such record date. Nothing in this paragraph
shall be construed to prevent the Trustee from setting a new record date for any
action for which a record date has previously been set pursuant to this
paragraph (whereupon the record date previously set shall automatically and with
no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities on the date such
action is taken. Promptly after any record date is set pursuant to this
paragraph, the Trustee, at the Company's expense, shall cause notice of such
record date, the proposed action by Holders and the applicable Expiration Date
to be given to the Company in writing and to each Holder of Securities in the
manner set forth in Section 106.

         With respect to any record date set pursuant to this Section, the party
hereto which sets such record dates may designate any day as the "Expiration
Date" and from time to time may change the Expiration Date to any earlier or
later day; provided that no such change shall be effective unless notice of the
proposed new Expiration Date is given to the other party hereto in writing, and
to each Holder of Securities in the manner set forth in Section 106, on or prior
to the existing Expiration Date. If an Expiration Date is not designated with
respect to any record date set pursuant to this Section, the party hereto which
set such record date shall be deemed to have initially designated the 180th day
after such record date as the Expiration Date with respect thereto, subject to
its right to change the Expiration Date as provided in this paragraph.
Notwithstanding the foregoing, no Expiration Date shall be later than the 180th
day after the applicable record date.

         Without limiting the foregoing, a Holder entitled hereunder to take
anyaction hereunder with regard to any particular Security may do so with regard
to all or any part of the principal amount of such Security or by one or more
duly appointed agents each of which may do so pursuant to such appointment with
regard to all or any part of such principal amount.

SECTION 105. Notices. Etc., to Trustee and Company.

         Any request, demand, authorization, direction, notice, consent, waiver
or Act of Holders or other document provided or permitted by this Indenture to
be made upon, given or furnished to, or filed with,

                  (1) the Trustee by any Holder or by the Company shall be
         sufficient for every purpose hereunder if made, given, furnished or
         filed in writing to or with the Trustee and received at its Corporate
         Trust Office or to it at Wilmington Trust Company, Rodney Square North,
         1100 North Market Street, Wilmington, Delaware 19890, Attention:
         Corporate Trust Administration, or

                  (2) the Company by the Trustee or by any Holder shall be
         sufficient for every purpose hereunder (unless otherwise herein
         expressly provided) if in writing and mailed, first-class postage
         prepaid, to the Company addressed to it at the address of its principal
         office specified in the first paragraph of this instrument or at any
         other address previously furnished in writing to the Trustee by the
         Company.

SECTION 106. Notice to Holders: Waiver.

         Where this Indenture provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if in writing and mailed, first-class postage

                                       13

<PAGE>   24

prepaid, to each Holder affected by such event, at his address as it appears in
the Security Register, not later than the latest date (if any), and not earlier
than the earliest date (if any), prescribed for the giving of such notice. In
any case where notice to Holders is given by mail, neither the failure to mail
such notice, nor any defect in any notice so mailed, to any particular Holder
shall affect the sufficiency of such notice with respect to other Holders. Where
this Indenture provides for notice in any manner, such notice may be waived in
writing by the Person entitled to receive such notice, either before or after
the event, and such waiver shall be the equivalent of such notice. Waivers of
notice by Holders shall be filed with the Trustee, but such filing shall not be
a condition precedent to the validity of any action taken in reliance upon such
waiver.

         In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such notification as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.

SECTION 107. Conflict with Trust Indenture Act.

         Until such time as this Indenture shall be qualified under the Trust
Indenture Act, this Indenture, the Company and the Trustee shall be deemed for
all purposes hereof to be subject to and governed by the Trust Indenture Act to
the same extent as would be the case if this Indenture were so qualified on the
date hereof. If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such Act to be a
part of and govern this Indenture, the latter provision shall control. If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall be
deemed to apply to this Indenture as so modified or to be excluded, as the case
may be.

SECTION 108. Effect of Headings and Table of Contents.

         The Article and Section headings herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.

SECTION 109. Successors and Assigns.

         All covenants and agreements in this Indenture by the Company shall
bind its successors and assigns, whether so expressed or not.

SECTION 110. Separability Clause.

         In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

SECTION 111. Benefits of Indenture.

         Nothing in this Indenture or in the Securities, express or implied,
shall give to any Person, other than the parties hereto and their successors
hereunder and the Holders of Securities, any benefit or any legal or equitable
right,remedy or claim under this Indenture. The provisions of Article
Thirteenare intended to be for the benefit of, and shall be enforceable directly
by, the holders of Senior Indebtedness.

                                       14

<PAGE>   25

SECTION 112. Governing Law.

         THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

SECTION 113. Legal Holidays.

         In any case where any Interest Payment Date, Redemption Date, Purchase
Date or Stated Maturity of any Security or the last day on which a Holder of a
Security has a right to convert his Security shall not be a Business Day, then
(notwithstanding any other provision of this Indenture or of the Securities)
payment of interest or principal or conversion of such security need not be made
on such date, but may be made on the next succeeding Business Day with the same
force and effect as if made on the Interest Payment Date, Redemption Date, or
Purchase Date, or at the Stated Maturity, provided, that no interest shall
accrue for the period from and after such Interest Payment Date, Redemption
Date, or Purchase Date, or Stated Maturity or last day for conversion, as the
case may be.

SECTION 114. No Recourse Against Others.

         A director, officer, employee or shareholder, as such, of the Company
shall not have any liability for any obligations of the Company under the
Securities or this Indenture or for any claim based on, in respect of or by
reason of such obligations or their creation. By accepting a Security, each
Holder shall waive and release all such liability. Such waiver and release shall
be part of the consideration for the issue of the Securities.

SECTION 115. Multiple Originals.

         The parties may sign any number of copies of this Indenture. Each
signed copy shall be an original, but all of them together represent the same
agreement. One signed copy is enough to prove this Indenture.

                                    ARTICLE 2

                                 Security Forms

SECTION 201. Forms Generally.

         The Securities and the Trustee's certificates of authentication shall
be in substantially the forms set forth in this Article, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be
required to comply with the rules of any securities exchange or as may,
consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities.

         The conversion notice shall be in substantially the form set forth in
the Annex to the Indenture.

                                       15

<PAGE>   26

         Securities shall be issued in definitive, fully registered form without
interest coupons, substantially in the form of Security set forth in Sections
202 and 203. The definitive Securities shall be printed, lithographed or
engraved or produced by any combination of these methods on steel engraved
borders or may be produced in any other manner, provided that such manner is
permitted by the rules of any securities exchange on which the Securities may be
listed, all as determined by the officers executing such Securities, as
evidenced by their execution of such Securities.

SECTION 202. Form of Face of Security.

                           PHILIP SERVICES CORPORATION

              3% Convertible Subordinated Notes due April 15, 2020

CUSIP No. 718193 AB 1

No._____________                                                $_______________

         Philip Services Corporation a corporation duly organized and existing
under the laws of Delaware (herein called the "Company", which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to __________, or registered assigns, the
principal sum of __________ Dollars on April 15, 2020, and to pay interest from
April 15, 2003 or from the most recent Interest Payment Date to which interest
has been paid or duly provided for, semi-annually on April 15 and October 15 in
each year, commencing October 15, 2003, (a) at the rate of 3% per annum on the
principal amount, until the principal hereof is paid or made available for
payment, or (b) (i) if a Change of Control occurs during a Deferral Period, (ii)
this Security has been tendered and not withdrawn pursuant to an Offer to
Purchase prior to the close of business on the Offer Expiration Date, and (iii)
the Company has not purchased this Security pursuant to Section 1403 of the
Indenture (a "Tendered Security"), at the rate of 12% per annum on the Purchase
Price of this Security from the day after the Offer Expiration Date until the
termination of the Deferral Period ("Deferral Period Interest"); provided that,
for greater certainty, interest payable after the termination of the Deferral
Period shall be payable on the full principal amount hereof.

         The interest so payable, and punctually paid or duly provided for, on
any Interest Payment Date will, as provided in such Indenture, be paid to the
Person in whose name this Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest, which shall be the April 1 or October 1 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date. Any such
interest, other than Deferral Period Interest, not so punctually paid or duly
provided for will forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on a
Special Record Date for the payment of such Defaulted Interest to be fixed by
the Trustee, notice whereof shall be given to Holders of Securities not less
than 10 days prior to such Special Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and upon such notice as may be
required by such exchange, all as more fully provided in said Indenture.
Interest on this Security shall be computed on the basis set forth in the
Indenture.

         One half of the Deferral Period Interest will accrue on the Purchase
Price of this Security and be paid in cash on the Interest Payment Date to the
Person in whose name this Security (or one or more

                                       16

<PAGE>   27

Predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest. The other half of the Deferral Period Interest
will accrue on the Purchase Price of this Security until the termination of the
Deferral Period but will only be paid in cash on the fifth Business Day after
the termination of the Deferral Period to the Person in whose name this Security
(or one or more Predecessor Securities) is registered ("Deferred Interest") on
the date of such termination. The Company's obligation to pay Deferral Period
Interest shall at all times be limited by and subject to the provisions of
Article 13 of the Indenture.

         Payment of the principal of and interest on this Security will be made
at the office or agency of the Company maintained for that purpose in the City
of Wilmington, Delaware and at any other office or agency maintained by the
Company for such purpose, in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and
private debts; provided, however, that at the option of the Company payment of
interest may be made by check, mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         Unless the certificate of authentication hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

         IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:

                                         PHILIP SERVICES CORPORATION

[CORPORATE SEAL]

                                         By: _________________________________
                                             Name:
                                             Title:

Attest:

______________________________
Name:
Title:

                                       17

<PAGE>   28

SECTION 203. Form of Reverse of Security.

         This Security is one of a duly authorized issue of Securities of the
Company designated as its 3% Convertible Subordinated Notes due April 15, 2020
(herein called the "Securities"), limited in aggregate principal amount to
$18,000,000, issued and to be issued under an Indenture, dated as of April 7,
2000 (herein called the "Indenture"), between the Company and Wilmington Trust
Company, as Trustee (herein called the "Trustee", which term includes any
successor trustee under the Indenture), to which Indenture and all indentures
supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties and immunities thereunder of the Company,
the Trustee and the Holders of the Securities and of the terms upon which the
Securities are, and are to be, authenticated and delivered.

         Upon the occurrence of a Redemption Change of Control, the Securities
are subject to redemption upon not less than 30 nor more than 60 days' notice by
mail, as a whole or in part, at the election of the Company, at a Redemption
Price equal to 100% of the principal amount then outstanding, together in the
case of any such redemption with accrued interest to but excluding the
Redemption Date, but interest installments whose Stated Maturity is on or prior
to such Redemption Date will be payable to the Holders of such Securities, or
one or more Predecessor Securities, of record at the close of business on the
relevant Regular Record Dates referred to on the face hereof, all as provided in
the Indenture.

         Subject to and upon compliance with the provisions of the Indenture,
the Holder of this Security is entitled, at its option, at any time, or in case
this Security or a portion hereof is called for redemption or the Holder hereof
has tendered this Security or a portion thereof to an Offer to Purchase, then in
respect of this Security until and including, but (unless the Company defaults
in making the payment due upon redemption or purchase, as the case may be) not
after, the close of business on the Redemption Date or the Purchase Date, as the
case may be, to convert this Security (or any portion of the principal amount
hereof that is an integral multiple of $1.00), into fully paid and nonassessable
Common Shares of the Company at an initial Conversion Price of $30.00 for each
Common Share (or at the current adjusted Conversion Price if an adjustment has
been made as provided in the Indenture) by surrender of this Security, duly
endorsed or assigned to the Company or in blank and, in case such surrender
shall be made during the period from the close of business of any Regular Record
Date next preceding any Interest Payment Date to the opening of business on such
Interest Payment Date ("Interest Period") (except Securities called for
redemption on a Redemption Date or to be purchased on a Purchase Date during, in
each case, such Interest Period), also accompanied by payment in same day or
other funds acceptable to the Company of an amount equal to the interest payable
on such Interest Payment Date on the principal amount of this Security then
being converted, and also the conversion notice hereon duly executed, to the
Company at the Corporate Trust Office of the Trustee, or at such other office or
agency of the Company, subject to any laws or regulations applicable thereto and
subject to the right of the Company to terminate the appointment of any
Conversion Agent as may be designated by it for such purpose in the City of
Wilmington, Delaware, or at such other offices or agencies as the Company may
designate (each a Conversion Agent). Subject to the aforesaid requirement for
payment and, in the case of a conversion after the Regular Record Date next
preceding any Interest Payment Date and on or before such Interest Payment Date,
to the right of the Holder of this Security (or any Predecessor Security) of
record at such Regular Record Date to receive an installment of interest, no
cash payment or adjustment is to be made on conversion, if the date of
conversion is not an Interest Payment Date, for interest accrued hereon from the
Interest Payment Date next preceding the date of conversion, or for dividends on
the Common Shares issued on conversion hereof. The Company shall thereafter
deliver to the Holder the fixed number of shares of Common Shares (together with
any cash adjustment, as provided in the Indenture) into which this Security is
convertible and such delivery will be deemed to satisfy the

                                       18

<PAGE>   29

Company's obligation to pay the principal amount of this Security. No fractions
of shares or scrip representing fractions of shares will be issued on
conversion, but instead of any fractional interest (calculated to the nearest
1/100th of a share) the Company shall pay a cash adjustment as provided in the
Indenture. The Conversion Price is subject to adjustment as provided in the
Indenture. In addition, the Indenture provides that in case of certain
amalgamations, consolidations or mergers to which the Company is a party or the
transfer of all or substantially all of the property and assets of the Company,
the Indenture shall be amended, without the consent of any holders of
Securities, so that this Security, if then Outstanding, will be convertible
thereafter, during the period this Security shall be convertible as specified
above, only into the kind and amount of securities, cash and other property
receivable upon such consolidation, merger or transfer by a holder of the number
of Common Shares of the Company into which this Security could have been
converted immediately prior to such consolidation, merger or transfer. No
adjustment in the Conversion Price will be made until the cumulative effect of
all such adjustments would require an increase or decrease of at least one
percent of such price, provided that any adjustment that would otherwise be made
will be carried forward and taken into account in the computation of any
subsequent adjustment.

         The Indenture provides that, subject to certain conditions, if a Change
of Control occurs, the Company shall be required to make an Offer to Purchase
for all of the Securities at the following prices (expressed as percentages of
the principal amount) if the Purchase Date is during the 12-month period
beginning April 15 of each of the years indicated below:

<TABLE>
<CAPTION>
                                                  Purchase
                         Year                      Price
                         ----                      -----
                         <S>                     <C>
                         2000                    64.45915%
                         2001                    68.32670%
                         2002                    72.42630%
                         2003                    76.77187%
                         2004                    81.37819%
                         2005                    86.26088%
                         2006                    88.84870%
                         2007                    91.51417%
                         2008                    94.25959%
                         2009                    97.08738%
</TABLE>

and thereafter at a price equal to 100% of the principal amount, in each case
plus accrued interest to the Purchase Date (provided, however, that installments
of interest whose Stated Maturity is on or prior to the Purchase Date shall be
payable to the Holders of such Securities, or one or more Predecessor
Securities, registered as such at the close of business on the relevant Record
Dates).

         In the event of redemption, purchase or conversion of this Security in
part only, a new Security or Securities for the unredeemed, unpurchased or
unconverted portion hereof will be issued in the name of the Holder hereof upon
the cancellation hereof.

         The indebtedness evidenced by this Security is, to the extent and in
the manner provided in the Indenture, subordinate and subject in right of
payment to the prior payment in full of all Senior Indebtedness of the Company,
and this Security is issued subject to such provisions of the Indenture with
respect thereto. Each Holder of this Security, by accepting the same, (a) agrees
to and shall be bound by such provisions, (b) authorizes and directs the Trustee
on his behalf to take such action as may be necessary or

                                       19

<PAGE>   30

appropriate to effectuate the subordination so provided and (c) appoints the
Trustee his attorney-in-fact for any and all such purposes.

         If an Event of Default shall occur and be continuing, the principal of
all the Securities may be declared due and payable in the manner and with the
effect provided in the Indenture.

         The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the consent of the Holders of a
majority in aggregate principal amount of the Securities at the time
Outstanding. The Indenture also contains provisions permitting the Holders of
specified percentages in aggregate principal amount of the Securities at the
time Outstanding, on behalf of the Holders of all the Securities, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and their consequences. Any such consent or
waiver by the Holder of this Security shall be conclusive and binding upon such
Holder and upon allfuture Holders of this Security and of any Security issued
upon the registration of transfer hereof or in exchange herefor or in lieu
hereof, whether or not notation of such consent or waiver is made upon this
Security.

         No reference herein to the Indenture and no provision of this Security
or of the Indenture shall alter or impair the obligation of the Company, which
is absolute and unconditional, to pay the principal of and interest on this
Security at the times, place and rate, and in the coin or currency, herein
prescribed or to convert this Security as provided in the Indenture.

         As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company in any place where the principal of and interest
on this Security are payable, duly endorsed by, or accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar duly executed by, the Holder hereof or his attorney duly authorized in
writing, and thereupon one or more new Securities, of authorized denominations
and for the same aggregate principal amount, will be issued to the designated
transferee or transferees.

         The Securities are issuable only in registered form without coupons in
denominations of $1.00 and any integral multiple thereof. As provided in the
Indenture and subject to certain limitations therein set forth, Securities are
exchangeable for a like aggregate principal amount of Securities of a different
authorized denomination, as requested by the Holder surrendering the same.

         No service charge shall be made for any such registration of transfer
or exchange, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         Interest on this Security shall be computed on the basis of a 360-day
year of twelve 30-day months.

                                       20

<PAGE>   31

         All terms used in this Security which are defined in the Indenture
shall have the meanings assigned to them in the Indenture.

         The Indenture and this Security shall be governed by and construed in
accordance with the laws of the State of New York.

                                 ASSIGNMENT FORM

To assign this Security, fill in the form below:

I or we assign and transfer this Security to:

________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
              (Print or type assignee's name, address and zip code)

________________________________________________________________________________
     (Print or type assignee's Social Security or other identifying number)

and irrevocably appoint_________________________________________________________

as agent to transfer this Security on the books of the Company. The agent may
substitute another to act for him or her.

Dated:______________________________   Signature:_______________________________
                                                 (Sign exactly as your name
                                                 appears on the face of this
                                                 Security)

                                       Signature
                                       Guarantee:_______________________________

Note: Signature must be guaranteed by an institution which is a member of the
following recognized signature guarantee programs: (i) the Securities Transfer
Agent Medallion Program, (ii) the New York Stock Exchange Medallion Program,
(iii) the Stock Exchange Medallion Program or (iv) another guarantee program
reasonably acceptable to the Trustee, if Securities are to be delivered other
than to and in the name of the registered owner.

                                       21

<PAGE>   32

SECTION 204. Form of Trustee's Certificate of Authentication.

This is one of the Securities referred to in the within-mentioned Indenture.

WILMINGTON TRUST COMPANY
in its capacity as Trustee

By:_____________________________
      Authorized Signatory

SECTION 205. Form of Conversion Notice.

         The form of conversion notice is attached as Annex A-1 hereto.

                                    ARTICLE 3

                                 The Securities

SECTION 301. Title and Terms.

         The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is limited to $18,000,000, except for
Securities authenticated and delivered upon registration of transfer of, or in
exchange for, or in lieu of, other Securities pursuant to Section 304, 305, 306,
906, 1108, 1202 or in connection with an Offer to Purchase pursuant to Section
1401.

         The Securities shall be known and designated as the "3% Convertible
Notes due April 15, 2020" of the Company. Their Stated Maturity shall be April
15, 2020 and they shall bear interest (a) at the rate of 3% per annum on the
principal amount, from April 15, 2003 or from the most recent Interest Payment
Date to which interest has been paid or duly provided for, as the case may be,
payable semi-annually on April 15 and October 15, commencing October 1, 2003,
until the principal thereof is paid or made available for payment, or (b)(i) if
a Change of Control occurs during the Deferral Period, (ii) a Security has been
tendered and not withdrawn pursuant to an Offer to Purchase prior to the close
of business on the Offer Expiration Date, and (iii) the Company has not
purchased such Security pursuant to Section 1403 (a "Tendered Security"), at the
rate of 12% per annum on the Purchase Price of such Security from the day after
the Offer Expiration Date until the termination of the Deferral Period
("Deferral Period Interest"); provided that, for greater certainty, interest
payable after the termination of the Deferral Period shall be payable on the
full principal amount of the Securities.

         One half of the Deferral Period Interest payable on a Tendered Security
will accrue on the Purchase Price of such Security and be paid in cash on the
Interest Payment Date to the Person in whose name such Security (or one or more
Predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest. The other half of the Deferral Period Interest
will accrue on the Purchase Price of such Security until the termination of the
Deferral Period but will only be paid in cash on

                                       22

<PAGE>   33

the fifth Business Day after the termination of the Deferral Period to the
Person in whose name such Tendered Security (or one or more Predecessor
Securities) is registered ("Deferred Interest") on the date of such termination.
The Company's obligation to pay Deferral Period Interest shall at all times be
limited by and subject to the provisions of Article 13.

         The principal of and interest on the Securities shall be payable at the
office or agency of the Company in the City of Wilmington, Delaware maintained
for such purpose or at any other office or agency maintained by the Company for
such purpose; provided, however, that at the option of the Company payment of
interest may be made by check mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

         The Securities shall be redeemable as provided in Article Eleven.

         The Securities shall be convertible as provided in Article Twelve.

         The Securities shall be subordinated in right of payment to Senior
Indebtedness of the Company as provide in Article Thirteen.

SECTION 302. Denominations.

         The Securities shall be issuable only in registered form without
coupons and only in denominations of $1.00 and any integral multiple thereof.

SECTION 303. Execution, Authentication, Delivery and Dating.

         The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its President or one of its Vice Presidents, under a
facsimile of its corporate seal reproduced thereon attested by its Secretary.
The signature of any of these officers on the Securities may be manual or
facsimile.

         Securities bearing the manual or facsimile signatures of individuals
who were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

         At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities executed by the Company to
the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities and an Opinion of Counsel in form
and substance satisfactory to the Trustee, to the effect that (1) this Indenture
has been qualified under the Trust Indenture Act, (2) all legally required
proceedings by the Company in connection with the authorization and issuance of
the Securities have been duly taken and all orders, consents or other
authorizations or approvals legally required for the validity of the Securities
have been obtained, (3) the Securities have been duly authorized and executed
and when authenticated in accordance with the terms of this Indenture will be
legal, valid and binding obligations of the Company enforceable in accordance
with their terms (subject to normal bankruptcy exceptions) and entitled to the
benefits of this Indenture, and (4) the stockholders of the Company do not have
pre-emptive rights with respect to the Common Stock to be issued upon the
conversion of the Securities and the Trustee in accordance with such Company
Order shall authenticate and deliver such Securities as in this Indenture
provided and not otherwise.

                                       23

<PAGE>   34

         Each Security shall be dated the date of its authentication.

         No Security shall be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder.

         In case the Company, pursuant to Article Eight, shall be consolidated
or merged with or into any other Person or shall convey, transfer, lease or
otherwise dispose of substantially all of its properties and assets to any
Person, and the successor Person resulting from such consolidation, or surviving
such merger, or into which the Company shall have been merged, or the successor
Person which shall have received a conveyance, transfer, lease or other
disposition as aforesaid, shall have executed an indenture supplemental hereto
with the Trustee pursuant to Article Eight, any of the Securities authenticated
or delivered prior to such consolidation, merger, conveyance, transfer, lease or
other disposition may, from time to time, at the request of the successor
Person, be exchanged for other Securities executed in the name of the successor
Person with such changes in phraseology and form as may be appropriate, but
otherwise in substance of like tenor as the Securities surrendered for such
exchange and of like principal amount; and the Trustee upon Company Order of the
successor Person, shall authenticate and deliver replacement Securities as
specified in such request for the purpose of such exchange. If replacement
Securities shall at any time be authenticated and delivered in any new name of a
successor Person pursuant to this Section in exchange or substitution for or
upon registration of transfer of any Securities, such successor Person, at the
option of any Holder but without expense to such Holder, shall provide for the
exchange of all Securities at the time outstanding held by such Holder for
Securities authenticated and delivered in such new name.

SECTION 304. Temporary Securities.

         Pending the preparation of definitive Securities, the Company may
execute, and upon Company Order the Trustee shall authenticate and deliver,
temporary Securities which are printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, substantially of the
tenor of the definitive Securities in lieu of which they are issued and with
such appropriate insertions, omissions, substitutions and other variations as
the officers executing such Securities may determine, as evidenced by their
execution of such Securities.

         If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay. After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at any office
or agency of the Company designated pursuant to Section 1002, without charge to
the Holder. Upon surrender for cancellation of any one or more temporary
Securities the Company shall execute and the Trustee shall authenticate and
deliver in exchange therefor a like principal amount of definitive Securities of
authorized denominations. Until so exchanged the temporary Securities shall in
all respects be entitled to the same benefits under this Indenture as definitive
Securities.

                                       24

<PAGE>   35

SECTION 305. Registration, Registration of Transfer and Exchange.

         (a) Registration, Registration of Transfer and Exchange Generally. The
Company shall cause to be kept at the Corporate Trust Office of the Trustee a
register (the register maintained in such office and in any other office or
agency designated pursuant to Section 1002 being herein sometimes collectively
referred to as the "Security Register") in which, subject to such reasonable
regulations as it may prescribe, the Company shall provide for the registration
ofSecurities and of transfers and exchanges of Securities. The Trustee is hereby
appointed "Security Registrar" for the purpose of registering Securities and
transfers and exchanges of Securities as herein provided.

         Upon surrender for registration of transfer of any Security at an
office or agency of the Company designated pursuant to Section 1002 for such
purpose, the Company shall execute, and the Trustee shall authenticate and
deliver, in the name of the designated transferee or transferees, one or more
new Securities of any authorized denominations and of a like aggregate principal
amount.

         At the option of the Holder, and subject to the other provisions of
this Section 305, Securities may be exchanged for other Securities of any
authorized denominations and of a like aggregate principal amount, upon
surrender of the Securities to be exchanged at such office or agency. Whenever
any Securities are so surrendered for exchange, and subject to the other
provisions of this Section 305, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

         All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

         Every Security presented or surrendered for registration of transfer or
for exchange shall (if so required by the Company or the Security Registrar) be
duly endorsed, or be accompanied by a written instrument of transfer in form
satisfactory to the Company and the Security Registrar duly executed, by the
Holder thereof or his attorney duly authorized in writing.

         No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental chargethat may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906, 1108, 1202 or 1401.

         The Company shall not be required (i) to issue, register the transfer
of or exchange any Security during a period beginning at the opening of business
15 days before the day of the mailing of a notice of redemption of Securities
selected for redemption under Section 1104 and ending at the close of business
on the day of such mailing, or (ii) to register the transfer of or exchange any
Security so selected for redemption in whole or in part, except the unredeemed
portion of any Security being redeemed in part.

SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.

         If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

                                       25

<PAGE>   36

         If there shall be delivered to the Company and the Trustee (i) evidence
to their satisfaction of the mutilation, destruction, loss or theft of any
Security and (ii) such security or indemnity as may be required by them to save
each of them and any agent of either of them harmless, then, in the absence of
notice to the Company or the Trustee that such Security has been acquired by a
bona fide purchaser, the Company shall execute and upon its request the Trustee
shall authenticate and deliver, in lieu of any such destroyed, lost or stolen
Security, a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

         In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, the Company in its discretion may,
but subject to any conversion rights, instead of issuing a new Security, pay
such Security.

         Upon the issuance of any new Security under this Section, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

         Every new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately with
any and all other Securities duly issued hereunder.

         The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities.

SECTION 307. Payment of Interest; Interest Rights Preserved.

         Subject to the provisions of Article 13 hereof, interest , other than
Deferred Interest, on any Security which is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in
whose name that Security (or one or more Predecessor Securities) is registered
at the close of business on the Regular Record Date for such interest. Deferred
Interest on any Security which is payable, and is punctually paid or duly
provided for, shall be paid on the fifth Business Day after the termination of
the Deferral Period to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on the date of
such termination.

         Any interest, other than Deferral Period Interest, on any Security
which is payable, but is not punctually paid or duly provided for, on any
Interest Payment Date (herein called "Defaulted Interest") shall forthwith cease
to be payable to the Holder on the relevant Regular Record Date by virtue of
having been such Holder, and such Defaulted Interest may be paid by the Company,
at its election in each case, as provided in clause (1) or (2) below:

                  (1) The Company may elect to make payment of any Defaulted
         Interest to the Persons in whose names the Securities (or their
         respective Predecessor Securities) are registered at the close of
         business on a Special Record Date for the payment of such Defaulted
         Interest, which shall be fixed in the following manner. TheCompany
         shall notifythe Trustee in writing of the amount of Defaulted Interest
         proposed to be paid on each Security and the date of the proposed
         payment, and at the same

                                       26

<PAGE>   37

         time the Company shall deposit with the Trustee an amount of money
         equal to the aggregate amount proposed to be paid in respect of such
         Defaulted Interest or shall make arrangements satisfactory to the
         Trustee for such deposit prior to the date of the proposed payment,
         such money when deposited to be held in trust for the benefit of the
         Persons entitled to such Defaulted Interest as in this clause provided.
         Thereupon the Trustee shall fix a Special Record Date for the payment
         of such Defaulted Interest which shall be not more than 15 days and not
         less than 10 days prior to the date of the proposed payment and not
         less than 10 days after the receipt by the Trustee of the notice of the
         proposed payment. The Trustee shall promptly notify the Company of such
         SpecialRecord Date and, in the name and at the expense of the Company,
         shall cause notice of the proposed payment of such Defaulted Interest
         and the Special Record Date therefor to be mailed, first-class postage
         prepaid, to each Holder at his address as it appears in the Security
         Register, not less than 10 days prior to such Special Record Date.
         Notice of the proposed payment of such Defaulted Interest and the
         Special Record Date therefor having been so mailed, such Defaulted
         Interest shall be paid to the Persons in whose names the Securities (or
         their respective Predecessor Securities) are registered at the close of
         business on such Special Record Date and shall no longer be payable
         pursuant to the following clause (2).

                  (2) The Company may make payment of any Defaulted Interest in
         any other lawful manner not inconsistent with the requirements of any
         securities exchange on which the Securities may be listed, and upon
         such notice as may be required by such exchange, if, after notice given
         by the Company to the Trustee of the proposed payment pursuant to this
         clause, such manner of payment shall be deemed practicable by the
         Trustee.

         Subject to the foregoing provisions of this Section, each Security
delivered under this Indenture upon registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest accrued
and unpaid, and to accrue, which were carried by such other Security.

         In the case of any Security which is converted after any Regular Record
Date and on or prior to the next succeeding Interest Payment Date (other than
any Security whose Maturity is prior to such Interest Payment Date), interest
whose Stated Maturity is on such Interest Payment Date shall be payable on such
Interest Payment Date notwithstanding such conversion, and such interest
(whether or not punctually paid or duly provided for) shall be paid to the
Person in whose name such Security (or one or more Predecessor Securities) is
registered at the close of business on such Regular Record Date. Except as
otherwise expressly provided in the immediately preceding sentence, in the case
of any Security which is converted, interest whose Stated Maturity is after the
date of conversion of such Security shall not be payable.

SECTION 308. Persons Deemed Owners.

         Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name such Security is registered as the owner of such
Security for the purpose of receiving payment of principal of and (subject to
Section 307) interest on such Security and for all other purposes whatsoever,
whether or not such Security be overdue, and neither the Company, the Trustee
nor any agentof the Company or the Trustee shall be affected by notice to the
contrary.

                                       27

<PAGE>   38

SECTION 309. Cancellation.

         All Securities surrendered for payment, redemption, purchase,
registration of transfer or exchange or conversion shall, if surrendered to any
Person other than the Trustee, be delivered tothe Trustee and shall be promptly
cancelled by it. The Company shall deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company
may have acquired in any manner whatsoever, and all Securities so delivered
shall be promptly cancelled by the Trustee. No Securities shall be authenticated
inlieu of or in exchange for any Securities cancelled as provided in this
Section, except as expressly permitted by this Indenture. All cancelled
Securities held by the Trustee shall be disposed of by the Trustee in accordance
with its customary procedures and certification of their disposal delivered to
the Company unless by Company Order the Company shall direct that cancelled
Securities be returned to it.

SECTION 310. Computation of Interest.

         Interest on the Securities shall be computed on the basis of a 360-day
year of twelve 30-day months.

                                    ARTICLE 4

                           Satisfaction and Discharge

SECTION 401. Satisfaction and Discharge of Indenture.

         This Indenture shall cease to be of further effect (except as to any
surviving rights of conversion, or registration of transfer or exchange of
Securities herein expressly provided for), and the Trustee, upon a Company Order
and at the expense of the Company, shall execute proper instruments
acknowledging satisfaction and discharge of this Indenture (including, but not
limited to, Article Twelve hereof), when

         (1)      either

                  (A) all Securities theretofore authenticated and delivered
         (other than (i) Securities which have been destroyed, lost or stolen
         and which have been replaced or paid as provided in Section 306 and
         (ii) Securities for whose payment money has theretofore been deposited
         in trust or segregated and held in trust by the Company and thereafter
         repaid to the Company or discharged from such trust, as provided in
         Section 1003) have been delivered to the Trustee for cancellation; or

                  (B) all such Securities not theretofore delivered to the
         Trustee for cancellation

                           (i) have become due and payable (whether on the
                  Purchase Date, upon an election by a Holder to convert its
                  Securities or otherwise), or

                           (ii) will become due and payable at their Stated
                  Maturity within one year, or

                                       28

<PAGE>   39

                           (iii) are to be called for redemption within one year
                  under arrangements satisfactory to the Trustee for the giving
                  of notice of redemption by the Trustee in the name, and at the
                  expense, of the Company,

         and the Company, in the case of (i), (ii) or (iii) above, has deposited
         or caused to be deposited with the Trustee as trust funds in trust for
         the purpose an amount sufficient to pay and discharge the entire
         indebtedness on such Securities not theretofore delivered to the
         Trustee for cancellation, for principal and interest to the date of
         such deposit (in the case of Securities which have become due and
         payable) or to the Purchase Date, Stated Maturity or Redemption Date,
         as the case may be;

                  (2) the Company has paid or caused to be paid all other sums
         payable hereunder by the Company; and

                  (3) the Company has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent herein provided for relating to the satisfaction and
         discharge of this Indenture have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture pursuant to
this Article Four, the obligations of the Company to the Trustee under Section
607 and, if money shall have been deposited with the Trustee pursuant to
subclause (B) of clause (1) of this Section, the obligations of the Trustee
under Section 402 and the last paragraph of Section 1003 shall survive.

SECTION 402. Application of Trust Money.

         Subject to the provisions of the last paragraph of Section 1003, all
money deposited with the Trustee pursuant to Section 401 shall be held in trust
and applied by it, in accordance with the provisions of the Securities and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal and interest for
whose payment such money has been deposited with the Trustee.

         All moneys deposited with the Trustee pursuant to Section 401 (and held
by it or any Paying Agent) for the payment of Securities subsequently converted
shall be returned to the Company upon Company Request.

         All moneys held pursuant to this Article shall not be subject to the
claims of the holders of Senior Indebtedness under Article Thirteen.

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<PAGE>   40

                                    ARTICLE 5

                                    Remedies

SECTION 501.  Events of Default.

     "Event of Default", wherever used herein, means (subject to Section 1302)
any one of the following events (whatever the reason for such Event of Default
and whether it shall be occasioned by the provisions of Article Fourteen or be
voluntary or involuntary or be effected by operation of law or pursuant to any
judgment, decree or order of any court or any order, rule or regulation of any
administrative or governmental body):

          (1) default in the payment of the principal of (or premium, if any,
     on) any Security at its Maturity; or

          (2) default in the payment of any interest upon any Security when it
     becomes due and payable, and continuance of such default for a period of 30
     days; or

          (3) default in the payment of principal and interest on Securities
     required to be purchased pursuant to an Offer to Purchase as described
     under Section 1401 when due and payable; or

          (4) default in the performance, or breach, of Section 801; or

          (5) default in the performance, or breach, of any covenant of the
     Company in this Indenture (other than a covenant a default in whose
     performance or whose breach is elsewhere in this Section specifically dealt
     with), and continuance of such default or breach for a period of 30 days
     after there has been given, by registered or certified mail, to the Company
     by the Trustee or to the Company and the Trustee by the Holders of at least
     25% in principal amount of the Outstanding Securities a written notice
     specifying such default or breach and requiring it to be remedied and
     stating that such notice is a "Notice of Default" hereunder; or

          (6) a default under the terms of the Subordinated Notes, which default
     results in the acceleration of the payment of all or any portion of such
     indebtedness; or

          (7) a default under the terms of any instrument evidencing or securing
     indebtedness for money borrowed by the Company or any Significant
     Subsidiary having an outstanding principal amount of $50 million, which
     default results in the acceleration of the payment of all or any portion of
     such indebtedness; or

          (8) a final judgment or final judgments for the payment of money are
     entered against the Company or any Significant Subsidiary in an aggregate
     amount of $35 million or more in excess of the amount covered by insurance,
     by a court or courts of competent jurisdiction, which judgments become
     liens and remain undischarged or unbonded for a period (during which
     execution shall not be effectively stayed) of 60 days after the right to
     appeal all such judgments have expired; or

          (9) the entry by a court having jurisdiction in the premises of (A) a
     decree or order for relief in respect of the Company or any Significant
     Subsidiary in an involuntary case or proceeding under

                                       30

<PAGE>   41

     any applicable U.S. Federal or State, Canadian Federal or Provincial or
     other applicable bankruptcy, insolvency, reorganization or other similar
     law or (B) a decree or order adjudging the Company or any Significant
     Subsidiary a bankrupt or insolvent, or approving as properly filed a
     petition seeking reorganization, arrangement, adjustment or composition of
     or in respect of the Company or any Significant Subsidiary under any
     applicable U.S. Federal or State, Canadian Federal or Provincial or other
     applicable law, or appointing a custodian, receiver, liquidator, assignee,
     trustee, sequestrator or other similar official of the Company or any
     Significant Subsidiary or of any substantial part of the property of the
     Company or any Significant Subsidiary, or ordering the winding up or
     liquidation of the affairs of the Company or any Significant Subsidiary,
     and the continuance of any such decree or order for relief or any such
     other decree or order unstayed and in effect for a period of 90 consecutive
     days; or

          (10) the commencement by the Company or any Significant Subsidiary of
     a voluntary case or proceeding under any applicable U.S. Federal or State,
     Canadian Federal or Provincial or other applicable bankruptcy, insolvency,
     reorganization or other similar law or of any other case or proceeding to
     be adjudicated a bankrupt or insolvent, or the consent by the Company or
     any Significant Subsidiary to the entry of a decree or order for relief in
     respect of the Company or any Significant Subsidiary in an involuntary case
     or proceeding under any applicable U.S. Federal or State, Canadian Federal
     or Provincial or other applicable bankruptcy, insolvency, reorganization or
     other similar law or to the commencement of any bankruptcy or insolvency
     case or proceeding against the Company or any Significant Subsidiary, or
     the filing by the Company of a petition or answer or consent seeking
     reorganization or relief under any applicable U.S. Federal or State,
     Canadian Federal or Provincial or other applicable law, or the consent by
     the Company or any Significant Subsidiary to the filing of such petition or
     to the appointment of or taking possession by a custodian, receiver,
     liquidator, assignee, trustee, sequestrator or similar official of the
     Company or any Significant Subsidiary or of any substantial part of the
     property of the Company or any Significant Subsidiary, or the making by the
     Company or any Significant Subsidiary of an assignment for the benefit of
     creditors, or the admission by the Company or any Significant Subsidiary in
     writing of its inability to pay its debts generally as they become due, or
     the taking of corporate action by the Company or any Significant Subsidiary
     in furtherance of any such action.

SECTION 502.  Acceleration of Maturity; Rescission and Annulment.

     If an Event of Default (other than an Event of Default specified in Section
501(9) or (10)) occurs and is continuing, then and in every such case the
Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities may declare the principal of all the Securities to be due
and payable (i) with respect to an Event of Default other than an Event of
Default specified in Section 501(2) with respect to Deferral Period Interest,
immediately, and (ii) with respect to an Event of Default specified in Section
501(2) with respect to Deferral Period Interest, upon termination of the
Deferral Period, in each case by a notice in writing to the Company (and to the
Trustee if given byHolders), and upon any such declaration such principal and
any accrued interest shall become immediately due and payable; provided,
however, that so long as the Credit Agreement or Exit Facility shall be in full
force and effect, if an Event of Default shall have occurred and be continuing
(other than an Event of Default specified in Section 501(9) or (10)), the
Securities shall not become due and payable until the earlier to occur of (x)
twenty days following delivery of written notice of such acceleration of the
Securities to the agent under each of the Credit Agreement or the Exit Facility
or (y) the acceleration (ipso facto or otherwise) of any indebtedness under the
Credit Agreement and the Exit Facility, as applicable.

                                       31

<PAGE>   42

     If an Event of Default specified in Section 501(9) or (10) occurs, the
principal of and any accrued interest on the Securities then Outstanding shall
ipso facto become immediately due and payable without any declaration or other
Act on the part of the Trustee or any Holder.

     At any time after such a declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter in this Article provided, the Holders of a majority
in principal amount of the Outstanding Securities, by written notice to the
Company and the Trustee, may rescind and annul such declaration and its
consequences if

          (1) the Company has paid or deposited with the Trustee a sum
     sufficient to pay

               (A) All overdue interest on all Outstanding Securities,

               (B) the principal of any Outstanding Securities which have become
          due otherwise than by such declaration of acceleration and, to the
          extent that payment of such interest is lawful, interest thereon at
          the rate provided by the Outstanding Securities,

               (C) to the extent that payment of such interest is lawful,
          interest upon overdue interest at the rate provided by the Securities,
          and

               (D) all sums paid or advanced by the Trustee hereunder and the
          reasonable compensation, expenses, disbursements and advances of the
          Trustee, its agents and counsel;

     and

          (2) all Events of Default, other than the non-payment of the principal
     of Securities which have become due solely by such declaration of
     acceleration, have been cured or waived as provided in Section 513.

     No such rescission shall affect any subsequent default or impair any right
consequent thereon.

SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee.

          The Company covenants that if

          (1) default is made in the payment of any interest on any Security
     when such interest becomes due and payable and such default continues for a
     period of 30 days, or

          (2) default is made in the payment of the principal of any Security at
     the Maturity thereof,

the Company will, upon demand of the Trustee, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and interest, and, to the extent that payment of such
interest shall be legally enforceable, interest on any overdue principal and on
any overdue interest, at the rate provided by the Securities, and, in addition
thereto, such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

                                       32

<PAGE>   43

     If the Company fails to pay such amounts forthwith upon such demand, the
Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon the Securities and collect the
moneys adjudged or decreed to be payable in the manner provided by law out of
the property of the Company or any other obligor upon the Securities, wherever
situated.

     If an Event of Default occurs and is continuing, the Trustee may in its
discretion proceed to protect and enforce its rights and the rights of the
Holders by such appropriate judicial proceedings as the Trustee shall deem most
effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.

SECTION 504.  Trustee May File Proofs of Claim.

     In case of any judicial proceeding relative to the Company (or any other
obligor upon the Securities), its property or its creditors, the Trustee shall
be entitled and empowered, by intervention in such proceeding or otherwise, to
take any and all actions authorized under the Trust Indenture Act in order to
have claims of the Holders and the Trustee allowed in any such proceeding and to
participate as a member, voting otherwise, of any committee of creditors
appointed in such matter. In particular, the Trustee shall be authorized to
collect and receive any moneys or other property payable or deliverable on any
such claims and to distribute the same; and any custodian, receiver, assignee,
trustee, liquidator, sequestrator or other similar official in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the
Trustee and, in the event that the Trustee shall consent to the making of such
payments directly to the Holders, to pay to the Trustee any amount due it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 607.

     No provision of this Indenture shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding.

SECTION 505.  Trustee May Enforce Claims Without Possession of Securities.

     All rights of action and claims under this Indenture or the Securities may
be prosecuted and enforced by the Trustee without the possession of any of the
Securities or the production thereof in any proceeding relating thereto, and any
such proceeding instituted by the Trustee shall be brought in its own name as
trustee of an express trust, and any recovery of judgment shall, after provision
for the payment of the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, be for the ratable benefit of
the Holders of the Securities in respect of which such judgment has been
recovered.

SECTION 506.  Application of Money Collected.

     Any money collected by the Trustee pursuant to this Article shall be
applied in the following order, at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of

                                       33

<PAGE>   44

principal or interest, upon presentation of the Securities and the notation
thereon of the payment if only partially paid and upon surrender thereof if
fully paid:

          FIRST: To the payment of all amounts due the Trustee under Section
     607;

          SECOND: To the extent provided in Article Thirteen, to the holders of
     Senior Indebtedness in accordance with Article Thirteen; and

          THIRD: To the payment of the amounts then due and unpaid for principal
     of and interest on the Securities in respect of which or for the benefit of
     which such money has been collected, ratably, without preference or
     priority of any kind, according to the amounts due and payable on such
     Securities for principal and interest, respectively.

SECTION 507.  Limitation on Suits.

     No Holder of any Security shall have any right to institute any proceeding,
judicial or otherwise, with respect to this Indenture, or for the appointment of
a receiver or trustee, or for any other remedy hereunder, unless

          (1) such Holder has previously given written notice to the Trustee of
     a continuing Event of Default;

          (2) the Holders of not less than 25% in principal amount of the
     Outstanding Securities shall have made written request to the Trustee to
     institute proceedings in respect of such Event of Default in its own name
     as Trustee hereunder;

          (3) such Holder or Holders have offered to the Trustee reasonable
     indemnity against the costs, expenses and liabilities to be incurred in
     compliance with such request;

          (4) the Trustee for 60 days after its receipt of such notice, request
     and offer of indemnity has failed to institute any such proceeding; and

          (5) no direction inconsistent with such written request has been given
     to the Trustee during such 60-day period by the Holders of a majority in
     principal amount of the Outstanding Securities;

it being understood and intended that no one or more Holders shall have any
right in any manner whatever by virtue of, or by availing of, any provision of
this Indenture to affect, disturb or prejudice the rights of any other Holders,
or to obtain or to seek to obtain priority or preference over any other Holders
or to enforce any right under this Indenture, except in the manner herein
provided and for the equal and ratable benefit of all the Holders.

     Notwithstanding anything contained herein to the contrary, at any time when
the Company is prohibited from making any payment of principal of or interest on
the Securities as described in Article 13, neither the Trustee nor the Holders
may (A) accelerate the maturity of the principal of or accrued interest on the
Securities (unless, with respect to this clause (A) only, the payment of the
aggregate indebtedness under the Credit Agreement or the Exit Facility shall
have been accelerated), (B) commence any action or

                                       34

<PAGE>   45

proceeding (including the right to set off) to collect payment of the principal
of or accrued interest on the Securities, or (C) commence an involuntary case or
proceeding in bankruptcy against the Company or seek the appointment of a
receiver, custodian or trustee with respect to the assets of the Company;
provided that the restrictions set forth in the foregoing clauses (A), (B), and
(C) shall not apply upon the commencing of any bankruptcy, dissolution, winding
up, liquidation or reorganization of the Company by any Persons other than the
Trustee or the Holders.

SECTION 508.  Unconditional Right of Holders to Receive Principal and Interest.

     Subject to Article Thirteen hereof and the last paragraph of Section 507
hereof, notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and (subject to Section 307) interest on such
Security on the respective Stated Maturities expressed in such Security (or, in
the case of redemption or purchase, on the Redemption Date or Purchase Date, as
the case may be) and to institute suit for the enforcement of any such payment,
and such rights shall not be impaired without the consent of such Holder.

SECTION 509.  Restoration of Rights and Remedies.

     If the Trustee or any Holder has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding has been discontinued
or abandoned for any reason, or has been determined adversely to the Trustee or
to such Holder, then and in every such case, subject to any determination in
such proceeding, the Company, the Trustee and the Holders shall be restored
severally and respectively to their former positions hereunder and thereafter
all rights and remedies of the Trustee and the Holders shall continue as though
no such proceeding had been instituted.

SECTION 510.  Rights and Remedies Cumulative.

     Except as otherwise provided with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Securities in the last paragraph of Section
306, no right or remedy herein conferred upon or reserved to the Trustee or to
the Holders is intended to be exclusive of any other right or remedy, and every
right and remedy shall, to the extent permitted by law, be cumulative and in
addition to every other right and remedy given hereunder or now or hereafter
existing at law or in equity or otherwise. The assertion or employment of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

SECTION 511.  Delay or Omission Not Waiver.

     No delay or omission of the Trustee or of any Holder of any Security to
exercise any right or remedy accruing upon any Event of Default shall impair any
such right or remedy or constitute a waiver of any such Event of Default or an
acquiescence therein. Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised from time to time, and as often
as may be deemed expedient, by the Trustee or by the Holders, as the case may
be.

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<PAGE>   46

SECTION 512.  Control by Holders.

     The Holders of a majority in principal amount of the Outstanding Securities
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or exercising any trust or
power conferred on the Trustee, provided that

          (1) such direction shall not be in conflict with any rule of law or
     with this Indenture, and

          (2) the Trustee may take any other action deemed proper by the Trustee
     which is not inconsistent with such direction.

SECTION 513.  Waiver of Past Defaults.

     The Holders of not less than a majority in principal amount of the
Outstanding Securities may on behalf of the Holders of all the Securities waive
any past default hereunder and its consequences, except a default

          (1) in the payment of the principal of or interest on any Security
     (including any Security which is required to have been purchased pursuant
     to an Offer to Purchase which has been made by the Company), or

          (2) in respect of a covenant or provision hereof which under Article
     Nine cannot be modified or amended without the consent of the Holder of
     each Outstanding Security affected.

     Upon any such waiver, such default shall cease to exist and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other
default or impair any right consequent thereon.

SECTION 514.  Undertaking for Costs.

     In any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; provided, that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company or the Trustee.

SECTION 515.  Waiver of Stay or Extension Laws.

     The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, or plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay or extension law wherever enacted,
now or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                       36

<PAGE>   47

                                    ARTICLE 6

                                  The Trustee

SECTION 601.  Certain Duties and Responsibilities.

          (a) If an Event of Default has occurred and is continuing, the Trustee
     shall exercise such of the rights and powers vested in it by this
     Indenture, and use the same degree of care and skill in its exercise, as a
     prudent person would exercise or use under the circumstances in the conduct
     of such person's own affairs.

          (b) Except during the continuance of an Event of Default:

               (i) the duties of the Trustee shall be determined solely by the
          express provisions of this Indenture and the Trustee need perform only
          those duties that are specifically set forth in this Indenture and no
          others, and no implied covenants or obligations shall be read into
          this Indenture against the Trustee; and

               (ii) in the absence of bad faith on its part, the Trustee may
          conclusively rely, as to the truth of the statements and the
          correctness of the opinions expressed therein, upon certificates or
          opinions furnished to the Trustee and conforming to the requirements
          of this Indenture. However, the Trustee shall examine the certificates
          and opinions to determine whether or not they conform to the
          requirements of this Indenture (but need not confirm or investigate
          the accuracy of mathematical calculations or other facts stated
          therein or otherwise verify the contents thereof).

          (c) The Trustee may not be relieved from liabilities for its own
     negligent action, its own negligent failure to act, or its own willful
     misconduct, except that:

               (i) this paragraph does not limit the effect of paragraph (b) of
          this Section 601;

               (ii) the Trustee shall not be liable for any error of judgment
          made in good faith by a Responsible Officer, unless it is proved that
          the Trustee was negligent in ascertaining the pertinent facts; and

               (iii) the Trustee shall not be liable with respect to any action
          it takes or omits to take in good faith in accordance with a direction
          received by it pursuant to Section 512 hereof.

          (d) Whether or not therein expressly so provided, every provision of
     this Indenture that in any way relates to the Trustee is subject to
     paragraphs (a), (b), and (c) of this Section 601.

          (e) No provision of this Indenture shall require the Trustee to expend
     or risk its own funds or incur any liability. The Trustee shall be under no
     obligation to exercise any of its rights and powers under this Indenture at
     the request of any Holder, unless such Holder shall have offered to

                                       37

<PAGE>   48

     the Trustee security and indemnity satisfactory to it against any loss,
     liability or expense including reasonable attorneys' fees that might be
     incurred by it in compliance with such request or direction.

          (f) The Trustee shall not be liable for interest on any money received
     by it except as the Trustee may agree in writing with the Company. Money
     held in trust by the Trustee need not be segregated from other funds except
     to the extent required by law.

SECTION 602.  Notice of Defaults.

     The Trustee shall give the Holders notice of any default hereunder as and
to the extent provided by the Trust Indenture Act; provided, however, that in
the case of any default of the character specified in Section 501(6), no such
notice to Holders shall be given until at least 30 days after the occurrence
thereof. For the purpose of this Section, the term "default" means any event
which is, or after notice or lapse of time or both would become, an Event of
Default.

SECTION 603.  Certain Rights of Trustee.

          Subject to the provisions of Section 601:

          (a) the Trustee may rely and shall be protected in acting or
     refraining from acting upon any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document believed by it to be genuine and to have been signed or presented
     by the proper party or parties;

          (b) any request or direction of the Company mentioned herein shall be
     sufficiently evidenced by a Company Request or Company Order and any
     resolution of the Board of Directors may be sufficiently evidenced by a
     Board Resolution;

          (c) whenever in the administration of this Indenture the Trustee shall
     deem it desirable that a matter be proved or established prior to taking,
     suffering or omitting any action hereunder, the Trustee (unless other
     evidence be herein specifically prescribed) may, in the absence of bad
     faith on its part, rely upon an Officers' Certificate;

          (d) the Trustee may consult with counsel and the written advice of
     such counsel or any Opinion of Counsel shall be full and complete
     authorization and protection in respect of any action taken, suffered or
     omitted by it hereunder in good faith and in reliance thereon;

          (e) the Trustee shall be under no obligation to exercise any of the
     rights or powers vested in it by this Indenture at the request or direction
     of any of the Holders pursuant to this Indenture, unless such Holders shall
     have offered to the Trustee reasonable security or indemnity against the
     costs, expenses and liabilities which might be incurred by it in compliance
     with such request or direction;

          (f) the Trustee shall not be bound to make any investigation into the
     facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document, but the Trustee, in its discretion, may make such further inquiry
     or investigation into such facts or

                                       38

<PAGE>   49

     matters as it may see fit, and, if the Trustee shall determine to make such
     further inquiry or investigation, it shall be entitled to examine the
     books, records and premises of the Company, personally or by agent or
     attorney; and

          (g) the Trustee may execute any of the trusts or powers hereunder or
     perform any duties hereunder either directly or by or through agents or
     attorneys and the Trustee shall not be responsible for any misconduct or
     negligence on the part of any agent or attorney appointed with due care by
     it hereunder.

SECTION 604.  Not Responsible for Recitals or Issuance of Securities.

     The recitals contained herein and in the Securities, except the Trustee's
certificates of authentication, shall be taken as the statements of the Company,
and the Trustee assumes no responsibility for their correctness. The Trustee
makes no representations as to the validity or sufficiency of this Indenture, of
the Securities or the Common Stock issuable upon the conversion of the
Securities. The Trustee shall not be accountable for the use or application by
the Company of Securities or the proceeds thereof.

SECTION 605.  May Hold Securities.

     The Trustee, any Authenticating Agent, any Paying Agent, any Conversion
Agent, any Security Registrar or any other agent of the Company, in its
individual or any other capacity, may become the owner or pledgee of Securities
and, subject to Sections 608 and 613, may otherwise deal with the Company with
the same rights it would have if it were not Trustee, Authenticating Agent,
Paying Agent, any Conversion Agent, Security Registrar or such other agent.

SECTION 606.  Money Held in Trust.

     Money held by the Trustee in trust hereunder need not be segregated from
other funds except to the extent required by law. The Trustee shall be under no
liability for interest on any money received by it hereunder except as otherwise
agreed with the Company.

SECTION 607.  Compensation and Reimbursement.

          The Company agrees

          (1) to pay to the Trustee from time to time reasonable compensation
     for all services rendered by it hereunder (which compensation shall not be
     limited by any provision of law in regard to the compensation of a trustee
     of an express trust);

          (2) except as otherwise expressly provided herein, to reimburse the
     Trustee upon its request for all reasonable expenses, disbursements and
     advances incurred or made by the Trustee in accordance with any provision
     of this Indenture (including the reasonable compensation and the expenses
     and disbursements of its agents and counsel), except any such expense,
     disbursement or advance as may be attributable to its negligence or bad
     faith; and

          (3) to indemnify the Trustee for, and to hold it harmless against, any
     loss, liability or expense incurred without negligence or bad faith on its
     part, arising out of or in connection with the

                                       39

<PAGE>   50

     acceptance or administration of this trust, including the costs and
     expenses of enforcing the Indenture against the Company (including Section
     607 hereof) and of defending itself against any claim or liability in
     connection with the exercise or performance of any of its powers or duties
     hereunder.

     The obligations of the Company under this Section 607 to compensate the
Trustee, to pay or reimburse the Trustee for expenses, disbursements and
advances and to indemnify and hold harmless the Trustee shall survive the
satisfaction and discharge of this Indenture. As security for the performanceof
such obligations of the Company, the Trustee shall have a claim prior to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of or interest on
particular Securities.

     When the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 501(9) or (10), the expenses (including
the reasonable charges and expenses of its counsel) of and the compensation for
such services are intended to constitute expenses of administration under any
applicable U.S. Federal or State bankruptcy, Canadian federal or provincial
insolvency or other similar law.

SECTION 608.  Disqualification: Conflicting Interests.

     If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.

SECTION 609.  Corporate Trustee Required; Eligibility.

     There shall at all times be a Trustee hereunder which shall be a Person
that is eligible pursuant to the Trust Indenture Act to act as such. Any
successor Trustee shall have a combined capital and surplus of at least
$50,000,000. If such Person publishes reports of condition at least annually,
pursuant to law or to the requirements of said supervising or examining
authority, then for the purposes of this Section, the combined capital and
surplus of such Person shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. If at any time
the Trustee shall cease to be eligible in accordance with the provisions of this
Section, it shall resign immediately in the manner and with the effect
hereinafter specified in this Article.

SECTION 610.  Resignation and Removal; Appointment of Successor.

     (a) No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee under Section 611.

     (b) The Trustee may resign at any time by giving written notice thereof to
the Company. If an instrument of acceptance by a successor Trustee shall not
have been delivered to the Trustee within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition any court of competent
jurisdiction for the appointment of a successor Trustee.

     (c) The Trustee may be removed at any time by Act of the Holders of a
majority in principal amount of the Outstanding Securities, delivered to the
Trustee and to the Company.

                                       40

<PAGE>   51

     (d) If at any time:

          (1) the Trustee shall fail to comply with Section 608 after written
     request therefor by the Company or by any Holder who has been a bona fide
     Holder of a Security for at least six months, or

          (2) the Trustee shall cease to be eligible under Section 609 and shall
     fail to resign after written request therefor by the Company or by any such
     Holder, or

          (3) the Trustee shall become incapable of acting or shall be adjudged
     a bankrupt or insolvent or a receiver of the Trustee or of its property
     shall be appointed or any public officer shall take charge or control of
     the Trustee or of its property or affairs for the purpose of
     rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 514, any Holder who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee.

     (e) If the Trustee shall resign, be removed or become incapable of acting,
or if a vacancy shall occur in the office of Trustee for any cause, the Company,
by a Board Resolution, shall promptly appoint a successor Trustee. If, within
one year after such resignation, removal or incapability, or the occurrence of
such vacancy, a successor Trustee shall be appointed by Act of the Holders of a
majority in principal amount of the Outstanding Securities delivered to the
Company and the retiring Trustee, the successor Trustee so appointed shall,
forthwith upon its acceptance of such appointment, become the successor Trustee
and supersede the successor Trustee appointed by the Company. If no successor
Trustee shall have been so appointed by the Company or the Holders and accepted
appointment in the manner hereinafter provided, any Holder who has been a bona
fide Holder of a Security for at least six months may, on behalf of himself and
all others similarly situated, petition any court of competent jurisdiction for
the appointment of a successor Trustee.

     (f) The Company shall give notice of each resignation and each removal of
the Trustee and each appointment of a successor Trustee to all Holders in the
manner provided in Section 106. Each notice shall include the name of the
successor Trustee and the address of its Corporate Trust Office.

SECTION 611.  Acceptance of Appointment by Successor.

     Every successor Trustee appointed hereunder shall execute, acknowledge and
deliver to the Company and to the retiringTrustee an instrument accepting such
appointment, and thereupon the resignation or removal of the retiring
Trusteeshall become effective andsuch successor Trustee, without any further
act, deed or conveyance, shall become vested with all the rights, powers, trusts
and duties of the retiring Trustee; but, on request of the Company or the
successor Trustee, such retiring Trustee shall, upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights, powers and trusts of the retiring Trustee and shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee hereunder. Upon request of any such successor Trustee, the
Company shall execute any and all instruments for more fully and certainly
vesting in and confirming to such successor Trustee all such rights, powers and
trusts.

                                       41

<PAGE>   52

     No successor Trustee shall accept its appointment unless at the time of
such acceptance such successor Trustee shall be qualified and eligible under
this Article.

SECTION 612.  Merger, Conversion, Consolidation or Succession to Business.

     Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
of the Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities shall have been authenticated,
but not delivered, by the Trustee then in office, any successor by merger,
conversion or consolidation to such authenticating Trustee may adopt such
authentication and deliver the Securities so authenticated with the same effect
as if such successor Trustee had itself authenticated such Securities.

SECTION 613.  Preferential Collection of Claims Against Company.

     If and when the Trustee shall be or become a creditor of the Company (or
any other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

SECTION 614.  Appointment of Authenticating Agent.

     The Trustee may appoint an Authenticating Agent or Agents which shall be
authorized to act on behalf of the Trustee to authenticate Securities issued
upon original issue and upon exchange, registration of transfer, partial
conversion, partial purchase or partial redemption or pursuant to Section 306,
and Securities so authenticated shall be entitled to the benefits of this
Indenture and shall be valid and obligatory for all purposes as if authenticated
by the Trustee hereunder. Wherever reference is made in this Indenture to the
authentication and delivery of Securities by the Trustee or the Trustee's
certificate of authentication, such reference shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each Authenticating Agent shall be acceptable to the
Company and shall at all times be a corporation organized and doing business
under the laws of the United States of America, any State thereof or the
District of Columbia, authorized under such laws to act as Authenticating Agent,
having a combined capital and surplus of not less than $50,000,000 and subject
to supervision or examination by Federal or State authority. If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or to the requirements of said supervising or examining authority, then
for the purposes of this Section, the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. If at any time an
Authenticating Agent shall cease to be eligible in accordance with the
provisions to this Section, such Authenticating Agent shall resign immediately
in the manner and with the effect specified in this Section.

     Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided

                                       42

<PAGE>   53

such corporation shall otherwise be eligible under this Section, without the
execution or filing of any paper or any further act on the part of the Trustee
or the Authenticating Agent.

     An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee and to the Company. The Trustee may at any time terminate
the agency of an Authenticating Agent by giving written notice thereof to such
Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall mail written notice of
such appointment by first-class mail, postage prepaid, to all Holders as their
names and addresses appear in the Security Register. Any successor
Authenticating Agent upon acceptance of its appointment hereunder shall become
vested with all the rights, powers and duties of its predecessor hereunder, with
like effect as if originally named as an Authenticating Agent. No successor
Authenticating Agent shall be appointed unless eligible under the provisions of
this Section.

     The Trustee agrees to pay to each Authenticating Agent from time to time
reasonable compensation for its services under this Section, and the Trustee
shall be entitled to be reimbursed for such payments, subject to the provisions
of Section 607.

     If an appointment ismade pursuant to this Section, the Securities mayhave
endorsed thereon, in addition to the Trustee's certificate of authentication, an
alternative certificate of authentication in the following form:

     This is one of the Securities described in the within-mentioned Indenture.

                                        Wilmington Trust Company As Trustee

                                        By
                                           -------------------------------------
                                           As Authenticating Agent

                                        By
                                           -------------------------------------
                                           Authorized Officer

                                       43

<PAGE>   54

                                    ARTICLE 7

                Holders' Lists and Reports by Trustee and Company

SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders.

          The Company will furnish or cause to be furnished to the Trustee

          (a) semi-annually, not more than 15 days after each Regular Record
     Date, a list, in such form as the Trustee may reasonably require, of the
     names and addresses of the Holders as of such Regular Record Date, and

          (b) at such other times as the Trustee may request in writing, within
     30 days after the receipt by the Company of any such request, a list of
     similar form and content as of a date not more than 15 days prior to the
     time such list is furnished;

excluding from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

SECTION 702.  Preservation of Information; Communications to Holders.

     (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders contained in the most recent
list furnished to the Trustee as provided in Section 701 and the names and
addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

     (b) The rights of Holders to communicate with other Holders with respect to
their rights under this Indenture or under the Securities and the corresponding
rights and duties of the Trustee, shall be provided by the Trust Indenture Act.

     (c) Every Holder of Securities, by receiving and holding the same,agrees
with the Company and the Trustee that neither the Company nor the Trustee nor
any agent of either of them shall be held accountable by reason of any
disclosure of information as to the names and addresses of Holders made pursuant
to Section 312 of the Trust Indenture Act.

SECTION 703.  Reports by Trustee.

     (a) The Trustee shall transmit to Holders such reports concerning the
Trustee and its actions under this Indenture as may be required pursuant to the
Trust Indenture Act at the times and in the manner provided pursuant thereto.

     (b) A copy of each such report shall, at the time of such transmission to
Holders, be filed by the Trustee with each stock exchange upon which the
Securities are listed, with the Commission and with the Company. The Company
will notify the Trustee when the Securities are listed on any stock exchange.

                                       44

<PAGE>   55

SECTION 704.  Reports by Company.

     The Company shall file with the Trustee and the Commission, and transmit to
Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to such Act; provided that any such information,
documents or reports required to be filed with the Commission pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 shall be filed with
the Trustee within 15 days after the same is so required to be filed with the
Commission.

                                    ARTICLE 8

              Consolidation, Merger, Conveyance, Transfer or Lease

SECTION 801.  Company May Consolidate, Etc. Only on Certain Terms.

     The Company may not, in a single transaction or a series of related
transactions, (i) consolidate or merge with or into any other Person or permit
any other Person to consolidate or merge with or into the Company or (ii)
directly or indirectly, transfer, sell, lease or otherwise dispose of all or
substantially all of its assets, unless:

          (1) in a transaction in which the Company does not survive or in which
     the Company sells, leases or otherwise disposes of all or substantially all
     of its assets, the successor entity to the Company (for purposes of this
     Article Eight, a "Successor Company") shall be a corporation, shall be
     organized and validly existing under the laws of the United States of
     America, any State thereof or the District of Columbia and shall expressly
     assume by an indenture supplemental hereto executed and delivered to the
     Trustee, in form satisfactory to the Trustee, the due and punctual payment
     of the principal of and interest on all the Securities and the performance
     of every covenant of this Indenture on the part of the Company to be
     performed or observed;

          (2) immediately before and after giving effect to such transaction, no
     Event of Default, and no event which, after notice or lapse of time, or
     both, would become an Event of Default, shall have occurred and be
     continuing;

          (3) the Company, or if applicable, the Successor Company has delivered
     to the Trustee an Officers' Certificate and an Opinion of Counsel, each
     stating that such consolidation, merger, conveyance, transfer, lease or
     acquisition and, if a supplemental indenture is required in connection with
     such transaction, such supplemental indenture, complies with this Article
     and that all conditions precedent herein provided for relating to such
     transaction have been complied with.

SECTION 802.  Successor Substituted.

     Upon any consolidation of the Company with, or merger of the Company into,
any other Person or any transfer, conveyance, sale, lease or other disposition
of all or substantially all of the properties and assets of the Company as an
entirety in accordance with Section 801, the Successor Company shall succeed to,
and be substituted for, and may exercise every right and power of, the Company
under this Indenture with the same effect as if such successor Person had been
named as the Company herein, and

                                       45

<PAGE>   56

thereafter, except in the case of a lease, the predecessor Person shall be
relieved of all obligations and covenants under this Indenture and the
Securities.

                                    ARTICLE 9

                            Supplemental Indentures

SECTION 901. Supplemental Indentures Without Consent of Holders.

     Without the consent of any Holders, the Company, when authorized by a Board
Resolution, and the Trustee, at any time and from time to time, may enter into
one or more indentures supplemental hereto, in form satisfactory to the Trustee,
for any of the following purposes:

          (1) to evidence the succession of another Person to the Company and
     the assumption by any such successor of the covenants of the Company herein
     and in the Securities; or

          (2) to add to the covenants of the Company for the benefit of the
     Holders, or to surrender any right or power herein conferred upon the
     Company; or

          (3) to comply with any requirements of the Commission in order to
     maintain the qualification of this Indenture under the Trust Indenture Act;
     or

          (4) to make provision with respect to the conversion rights of Holders
     of Securities pursuant to Section 1211; or

          (5) to cure any ambiguity, to correct or supplement any provision
     herein which may be inconsistent with any other provision herein, or to
     make any other provisions with respect to matters or questions arising
     under this Indenture which shall not be inconsistent with the provisions of
     this Indenture, provided such action pursuant to this clause (4) shall not
     adversely affect the interests of the Holders in any material respect.

SECTION 902.  Supplemental Indentures with Consent of Holders.

     With the consent of the Holders of not less than a majority in principal
amount of the Outstanding Securities, by Act of said Holders delivered to the
Company and the Trustee, the Company, when authorized by a Board Resolution, and
the Trustee may enter into an indenture or indentures supplemental hereto for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of this Indenture or of modifying in any manner the rights
of the Holders under this Indenture; provided, however, that no such
supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby,

          (1) change the Stated Maturity of the principal of, or any instalment
     of interest on, any Security, or reduce the principal amount thereof or the
     rate of interest thereon, or change the place of payment where, or the coin
     or currency in which, any Security or the interest thereon is payable, or
     impair the right to institute suit for the enforcement of any such payment
     on or after the Stated Maturity thereof (or, in the case of redemption or
     any purchase, on or after the Redemption Date or

                                       46

<PAGE>   57

     Purchase Date, as the case may be),or except as permitted by Section 1211,
     adversely affect the right to convert any Security as provided in Article
     Twelve, or modify the provisions of this Indenture with respect to the
     subordination of the Securities in a manner adverse to the Holders of
     Securities, or

          (2) reduce the percentage in principal amount of the Outstanding
     Securities, the consent of whose Holders is required for any such
     supplemental indenture, or the consent of whose Holders is required for any
     waiver (of compliance with certain provisions of this Indenture or certain
     defaults hereunder and their consequences) provided for in this Indenture,
     or

          (3) modify any of the provisions of this Section, Section 513 or
     Section 1011, except to increase any such percentage or to provide that
     certain other provisions of this Indenture cannot be modified or waived
     without the consent of the Holder ofeach Outstanding Security affected
     thereby, or

          (4) following the mailing of an Offer with respect to an Offer to
     Purchase pursuant to Section 1401, modify the provisions of this Indenture
     with respect to such Offer to Purchase in a manner adverse to such Holder.

     It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

SECTION 903.  Execution of Supplemental Indentures.

     In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 601) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture. The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

SECTION 904.  Effect of Supplemental Indentures.

     Upon the execution of any supplemental indenture under this Article, this
Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby. No such supplemental indenture shall directly or
indirectly modify the provisions of Article Thirteen in any manner which might
terminate or impair the rights of the Senior Debt pursuant to such subordination
provisions.

SECTION 905.  Conformity with Trust Indenture Act.

     Every supplemental indenture executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act.

                                       47

<PAGE>   58

SECTION 906.  Reference in Securities to Supplemental Indentures.

     Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may, and shall if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplementalindenture. If the Company shall so determine,
new Securities so modified as to conform, in the opinion of the Trustee and the
Company, to any such supplemental indenture may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities.

                                   ARTICLE 10

                                   Covenants

SECTION 1001. Payment of Principal and Interest.

     The Company will duly and punctually pay the principal of and interest on
the Securities in accordance with the terms of the Securities and this
Indenture.

SECTION 1002.  Maintenance of Office or Agency.

     The Company will maintain in the City of Wilmington, Delaware an office or
agency where Securities may be presented or surrendered for payment, where
Securities may be surrendered for registration of transfer or exchange, where
Securities may be surrendered for conversion and where notices and demands to or
upon the Company in respect of the Securities and this Indenture may be served.
The Company will give prompt written notice to the Trustee of the location, and
any change in the location, of such office or agency. If at any time the Company
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee, and the Company hereby appoints the Trustee as its agent to receive all
such presentations, surrenders, notices and demands.

     The Company may also from time to time designate one or more other offices
or agencies (in or outside the City of Wilmington, Delaware) where the
Securities may be presented or surrendered for any or all such purposes and may
from time to time rescind such designations; provided, however, that no such
designation or rescission shall in any manner relieve the Company of its
obligation to maintain an office or agency in the City of Wilmington, Delaware,
for such purposes. The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other office or agency.

SECTION 1003.  Money for Security Payments to be Held in Trust.

     If the Company shall at any time act as its own Paying Agent, it will, on
or before each due date of the principal of or interest on any of the
Securities, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal or interest so becoming due until
such sums shall be paid to such Persons or otherwise disposed of as herein
provided and will promptly notify the Trustee of its action or failure so to
act.

                                       48

<PAGE>   59

     Whenever the Company shall haveone or more Paying Agents, it will, prior to
each due date of the principal of or interest on any Securities, deposit with a
Paying Agent a sum sufficient to pay the principal or interest so becoming due,
such sum to be held in trust for the benefit of the Persons entitled to such
principal or interest, and (unless such Paying Agent is the Trustee) the Company
will promptly notify the Trustee of its action or failure so to act.

     The Company will cause each Paying Agent other than the Trustee to execute
and deliver to the Trustee an instrument in which such Paying Agent shall agree
with the Trustee, subject to the provisions of this Section, that such Paying
Agent will:

          (1) hold all sums held by it for the payment of the principal of or
     interest on Securities in trust for the benefit of the Persons entitled
     thereto until such sums shall be paid to such Persons or otherwise disposed
     of as herein provided;

          (2) give the Trustee notice of any default by the Company (or any
     other obligor upon the Securities) in the making of any payment of
     principal or interest; and

          (3) at any time during the continuance of any such default, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums so
     held in trust by such Paying Agent.

     The Company may at any time, for the purpose of obtaining the satisfaction
and discharge of this Indenture or for any other purpose, pay, or by Company
Order direct any Paying Agent to pay, to the Trustee all sums held in trust by
the Company or such Paying Agent, such sums to be held by the Trustee upon the
same trusts as those upon which such sums were held by the Company or such
Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such
Paying Agent shall be released from all further liability with respect to such
money.

     Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of or interest on any
Security and remaining unclaimed for two years after such principal or interest
has become due and payable shall be paid to the Company on Company Request, or
(if then held by the Company) shall be discharged from such trust; and the
Holder of such Security shall thereafter, as an unsecured general creditor, look
only to the Company for payment thereof, and all liability of the Trustee or
such Paying Agent with respect to such trust money, and all liability of the
Company as trustee thereof, shall thereupon cease; provided, however, that the
Trustee or such Paying Agent, before being required to make any such repayment,
may at the expense of the Company cause to be published once, in a newspaper
published in the English language, customarily published on each Business Day
and of general circulation in The City of New York, notice that such money
remains unclaimed and that, after a date specified therein, which shall not be
less than 30 days from the date of such publication, any unclaimed balance of
such money then remaining will be repaid to the Company.

SECTION 1004.  Existence.

     Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force andeffect its existence,
rights (charter and statutory) and franchises; provided, however, that the
Company shall not be required to preserve any such right or franchise if the
Board of Directors in good faith shall determine that the preservation thereof
is no longer desirable in the conduct of

                                       49

<PAGE>   60

the business of the Company and that the loss thereof is not disadvantageous in
any material respect to the Holders.

SECTION 1005.  Maintenance of Properties.

     The Company will cause all properties used or useful in the conduct of its
business or the business of any Subsidiary of the Company to be maintained and
kept in good condition, repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
the Company may be necessary so that the business carried on in connection
therewith may be properly and advantageously conducted at all times; provided,
however, that nothing in this Section shall prevent the Company from
discontinuing the operation or maintenance of any of such properties if such
discontinuance is, as determined by the Board of Directors in good faith,
desirable in the conduct of its business or the business of any Subsidiary and
not disadvantageous in any material respect to the Holders.

SECTION 1006.  Payment of Taxes and Other Claims.

     The Company will pay or discharge or cause to be paid or discharged, before
the same shall become delinquent, (1) all taxes, assessments and governmental
charges levied or imposed upon the Company or any of its Subsidiaries or upon
the income, profits or property of the Company or any of its Subsidiaries, and
(2) all lawful claims for labor, materials and supplies which, if unpaid, might
by law become a lien upon the property of the Company or any of its
Subsidiaries; provided, however, that the Company shall not be required to pay
or discharge or cause to be paid or discharged any such tax, assessment, charge
or claim whose amount, applicability or validity is being contested in good
faith by appropriate proceedings.

SECTION 1007.  Registration and Listing.

     (1) Prior to the time the Securities become convertible, the Company will
effect all registrations with, and obtain all approvals by, all governmental
authorities that may be necessary under any United States Federal or state law
(including the Securities Act, the Exchange Act and state securities and Blue
Sky laws) before the Common Shares issuable upon conversion of Securities may be
lawfully issued and delivered, and thereafter publicly traded (if permissible
under the Securities Act), and qualified or listed as contemplated by clause (2)
(it being understood that for purposes of this Section 1007, the Company shall
not be required to register the Securities or the Common Shares under the
Securities Act); and (2) prior to the time the Securities become convertible,
the Company will cause the Common Shares required to be issued and delivered
upon conversion of Securities, prior to such issuance or delivery, to be quoted
on Nasdaq or, if the Common Shares are not then listed on Nasdaq, cause to be
listed the Common Shares on the United States national securities exchange, if
any, on which Common Shares are listed or quoted at the time of such delivery.
Upon such registration, approval, quotation or listing, if any, as provided in
(1) and (2) above, the Company will deliver to the Trustee and theConversion
Agent an Officers'Certificate notifying them of such compliance with Section
1007.

                                       50

<PAGE>   61

SECTION 1008.  Limitation on Restricted Payments

     The Company (i) may not, and may not permit any Subsidiary of the Company
to, directly or indirectly, declare orpay any dividend or make any distribution
(including any payment in connection with any merger or consolidation derived
from assets of the Company or any Subsidiary) in respect of its Capital Stock or
to the holders thereof, excluding (a) any dividends or distributions by the
Company payable solely in shares of its Common Stock (other than Redeemable
Stock) or in options, warrants or other rights to acquire its Common Stock
(other than Redeemable Stock), and (b) in the case of a Subsidiary, dividends or
distributions payable (1)to the Company or a Subsidiary and(2) to minority
shareholders of such Subsidiary, provided that at least a pro rata amount is
paid to the Company and/or a Subsidiary, as the case may be, and (ii) may not,
and may not permit any Subsidiary to, directly or indirectly, purchase, redeem,
or otherwise acquire or retire for value (a) any Capital Stock of the Company or
(b) any options, warrants or other rights to acquire shares of Capital Stock of
the Company or any securities convertible or exchangeable into shares of Capital
Stock of the Company (each of clauses (i) and (ii) being a "Restricted Payment")
if: (1) an Event of Default, or an event that with the passing of time or the
giving of notice, or both, would constitute an Event of Default, shall have
occurred and be continuing or would result from such Restricted Payment, or (2)
upon giving effect to such Restricted Payment, the aggregate of all Restricted
Payments from the date of original issuance of the Securities exceeds the sum of
(a) 75% of cumulative Consolidated Net Income (or, in the case Consolidated Net
Income shall be negative, less 100% of such deficit) of the Company from the
date of original issuance of the Securities through the last day of the last
full fiscal quarter ending immediately preceding such Restricted Payment for
which quarterly or annual financial statements are available (taken as a single
accounting period); plus (b) 100% of the aggregate net cash proceeds received by
the Company after the date of original issuance of the Securities, from
contributions of capital or the issuance and sale (other than to a Subsidiary)
of Capital Stock (other than Redeemable Stock) of the Company, options, warrants
or other rights to acquire Capital Stock (other than Redeemable Stock) of the
Company and indebtedness of the Company that has been converted into or
exchanged for Capital Stock (other than Redeemable Stock and other than by or
from a Subsidiary) of the Company after the date of original issuance of the
Securities. Prior to the making of any Restricted Payment, the Company shall
deliver to the Trustee an Officers' Certificate setting forth the computations
by which the determinations required by clause (2) above were made and stating
that no Event of Default, or event that with the passing of time or the giving
of notice, or both, would constitute an Event of Default, has occurred and is
continuing or will result from such Restricted Payment.

     Notwithstanding the foregoing, so long as no Event of Default, or event
that with the passing of time or the giving of notice, or both, would constitute
an Event of Default, shall have occurred and be continuing or would result
therefrom, (i) the Company and any Subsidiary of the Company may pay any
dividend on Capital Stock of any class within 60 days after the declaration
thereof if, on the date when the dividend was declared, the Company or such
Subsidiary could have paid such dividend in accordance with the foregoing
provisions; (ii) the Company may purchase, redeem, acquire or retire any shares
of Capital Stock of the Company solely in exchange for or out of the net
proceeds of the substantially concurrent sale (other than from or to a
Subsidiary or from or to an employee stock ownership plan financed by loans from
the Company or a Subsidiary of the Company) of shares of Capital Stock (other
than Redeemable Stock) of the Company. Any payment made pursuant to clause (i)
or (ii) of this paragraph shall be a Restricted Payment for purposes of
calculating aggregate Restricted Payments pursuant to the preceding paragraph.

                                       51

<PAGE>   62

SECTION 1009.  Limitation on Dividend and Other Payment Restrictions
               Affecting Subsidiaries

     The Company may not, and may not permit any Subsidiary to, directly or
indirectly, create or otherwise cause or suffer to exist or become effective any
encumbrance or restriction on the ability of any Subsidiary of the Company to
pay dividends (in cash or otherwise) or make any other distributions in respect
of its Capital Stock owned by the Company or any other Subsidiary of the
Company. Notwithstanding the foregoing, the Company may, and may permit any
Subsidiary to, suffer to exist any such encumbrance or restriction:

          (1) pursuant to any agreement in effect on the date of original
     issuance of the Securities;

          (2) pursuant to an agreement relating to any indebtedness incurred by
     a Person (other than a Subsidiary of the Company existing on the date of
     original issuance of the Securities or any Subsidiary carrying on any of
     the businesses of any such Subsidiary) prior to the date on which such
     Person became a Subsidiary of the Company and outstanding on such date and
     not incurred in anticipation of becoming a Subsidiary, which encumbrance or
     restriction is not applicable to any Person, or the properties or assets of
     any Person, other than the Person so acquired;

          (3) pursuant to an agreement effecting a renewal, extension, refunding
     or refinancing of indebtedness incurred pursuant to an agreement referred
     to in clause (a) above, provided, however, that the provisions contained in
     such renewal, extension, refunding or refinancing agreement relating to
     such encumbrance or restriction are no more restrictive, taken as a whole,
     than the provisions contained in the agreement the subject thereof, as
     determined in good faith by the Board of Directors and evidenced by a
     resolution of the Board of Directors filed with the Trustee;

          (4) with respect to a Subsidiary of the Company imposed pursuant to an
     agreement which has been entered into for the sale or disposition of all or
     substantially all of the Capital Stock or assets of such Subsidiary,
     provided that consummation of such transaction would not result in an Event
     of Default or an event that, with the passing of time or the giving of
     notice or both, would constitute an Event of Default, that such restriction
     terminates if such transaction is closed or abandoned and that the closing
     or abandonment of such transaction occurs within one year of the date such
     agreement was entered into;

          (5) if such encumbrance or restriction is the result of applicable
     corporate law or regulation relating to the payment of dividends or
     distributions.

SECTION 1010.  Limitation on Distributions of Assets to Shareholders.

     The Company may not, and may not permit any Subsidiary to, directly or
indirectly, distribute, as a dividend or otherwise, any Capital Stock of a
Subsidiary to shareholders of the Company, unless such Subsidiary shall have
fully and unconditionally guaranteed the payment of principal and interest on
the Securities.

                                       52

<PAGE>   63

SECTION 1011.  Statement By Officers as to Default; Compliance Certificates.

     (a) The Company will deliver to the Trustee, within 120 days after the end
of each fiscal year, and within 60 days after the end of each fiscal quarter
(other than the fourth fiscal quarter), of the Company ending after the date
hereof an Officers' Certificate, stating whether or not to the best knowledge of
the signers thereof the Company is in default in the performance and observance
of any of the terms, provisions and conditions of Section 801 or Sections 1004
to 1009, inclusive, and if the Company shall be in default, specifying all such
defaults and the nature and status thereof of which they may have knowledge.

     (b) The Company shall deliver to the Trustee, as soon as possible and in
any event within 10 days after the Company becomes awareor should reasonably
become aware of the occurrence of an Event of Default or an event which, with
notice or the lapse of time or both, would constitute an Event of Default, an
Officers' Certificate setting forth the details of such Event of Default or
default, and the action which the Company proposes to take with respect thereto.

     (c) The Company shall deliver to the Trustee within 90 days after the end
of each fiscal year a written statement by the Company's independent auditors or
public accountants stating (A) that their audit examination has included a
review of the terms of this Indenture and the Securities as they relate to
accounting matters, and (B) whether, in connection with their audit examination,
any event which, with notice or the lapse of time or both, would constitute an
Event of Default has come to their attention and, if such a default has come to
their attention, specifying the nature and period of the existence thereof.

SECTION 1012.  Waiver of Certain Covenants.

     The Company may omit in any particular instance to comply with any covenant
or condition set forth in Section 801 and Sections 1004 to 1009 inclusive, if
before the time for such compliance the Holders of at least a majority in
principal amount of the Outstanding Securities shall, by Act of such Holders,
either waive such compliance in such instance or generally waive compliance with
such covenant or condition, but no such waiver shall extend to or affect such
covenant or condition except to the extent so expressly waived, and, until such
waiver shall become effective, the obligations of the Company and the duties of
the Trustee in respect of any such covenant or condition shall remain in full
force and effect.

SECTION 1013.  Indemnification of Judgment Currency.

     The Company shall indemnify the Trustee and any Holder against any loss
incurred by the Trustee or such Holder, as the case may be, as a result of any
judgment or order being given or made for any amount due under this Indenture or
such Security and being expressed and paid in a currency (the "Judgment
Currency") other than Dollars, and as a result of any variation between (i) the
rate of exchange at which the Dollar amount is converted into the Judgment
Currency for the purpose of such judgment or order and (ii) the spot rate of
exchange in The City of New York at which the Trustee or such Holder, as the
case may be, on the date of payment of such judgment or order is able to
purchase Dollars with the amount of the Judgment Currency actually received by
the Trustee or such Holder. The foregoing indemnity shall constitute a separate
and independent obligation of the Company and shall continue in full force and
effect notwithstanding any such judgment or order as aforesaid. The term "spot
rate of exchange" shall includeany premiums and costs of exchange payable in
connection with the purchase of, or conversion into, United States dollars as
quoted by The Bank of Nova Scotia at its central foreign exchange desk in its
head office in Toronto at 12:00 noon (Toronto time).

                                       53

<PAGE>   64

SECTION 1014.  Available Information.

     Whether or not the Company is required to be subject to Section 13(a) or
15(d) of the Exchange Act, or any successor provision thereto, the Company shall
file with the Commission the annual reports, quarterly reports and other
documents which the Company would have been required to file with the Commission
pursuant to such Section 13(a) or 15(d) or any successor provisionthereto if the
Company were so required, such documents to be filed with the Commission on or
prior to the respective dates (the "Required Filing Dates") by which the Company
would have been required so to file such documents if the Company were so
required. The Company shall also in any event (a) within 15 days of each
Required Filing Date (i) transmit by mailto all Holders, as their names and
addresses appear in the Security Register, without cost to such Holders, and
(ii) furnish to the Trustee, copies of the annual reports, quarterly reports and
other documents which the Company files with the Commission pursuant to such
Section 13(a) or 15(d) or any successor provision thereto or would have been
required to file with the Commission pursuant to such Section 13(a) or 15(d) or
any successor provisions thereto if the Company were required to be subject to
such Sections and (b) if filing such documents by the Company with the
Commission is not permitted under the Exchange Act, promptly upon written
request supply copies of such documents to any prospective Holder.

SECTION 1015.  Acquisition of Securities.

     The Company shall not, and shall cause its Affiliates not to, resell or
otherwise dispose of any Securities acquired by them, in the open market or
otherwise, and shall, and shall cause its Affiliates to, surrender all such
Securities acquired to the Trustee for cancellation.

                                   ARTICLE 11

                            Redemption of Securities

SECTION 1101. Right of Redemption.

     The Securities may be redeemed at the election of the Company, as a whole
or in part, upon the occurrence of a Redemption Change of Control in amounts of
$1.00 or any integral multiples of $1.00 at the Redemption Price specified in
the form of Security hereinbefore set forth together with accrued interest to
the Redemption Date. The election of the Company to redeem any Securities
pursuant to Section 1101 shall be evidenced by a Board Resolution.

SECTION 1102.  Applicability of Article.

     Redemption of Securities at the election of the Company, as permitted by
any provision of this Indenture, shall be made in accordance with such provision
and this Article.

SECTION 1103.  Notices to Trustee.

     If the Company elects to redeem Securities pursuant to Section 1101, it
shall notify the Trustee of the Redemption Date and the principal amount of
Securities to be redeemed. The Company shall give each notice to the Trustee
provided for in this Section 1103 at least five days prior to the date on which
notice is to be given (or such shorter period as the Trustee may permit), as set
forth in section 1105. Any

                                       54

<PAGE>   65

such notice may be canceled at any time prior to notice of such redemption being
mailed to any Holder and shall thereby be void and of no effect. In case of any
redemption at the election of the Company of less than all the Securities, the
notification to the Trustee shall specify the principal amount of Securities to
be redeemed.

SECTION 1104.  Selection by Trustee of Securities to Be Redeemed.

     If less than all the Securities are to be redeemed, the particular
Securities to be redeemed shall be selected not more than 60 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities not previously
called for redemption, by such method as the Trustee shall deem fair and
appropriate and which may provide for the selection for redemption of portions
(equal to $1.00 or any integral multiple thereof) of the principal amount of
Securities of a denomination larger than $1.00.

     The Trustee shall promptly notify the Company and each Security Registrar
in writing of the Securities selected for redemption and, in the case of any
Securities selected for partial redemption, the principal amount thereof to be
redeemed.

     For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Securities which has been or is to be redeemed.

SECTION 1105.  Notice of Redemption.

     Notice of redemption shall be given by first-class mail, postage prepaid,
mailed not less than 30 nor more than 60 days prior to the Redemption Date, to
each Holder of Securities to be redeemed, at his address appearing in the
Security Register.

          All notices of redemption shall set forth:

          (1) the Redemption Date,

          (2) the Redemption Price,

          (3) a brief statement setting forth the Company's right to effect such
     redemption and the Company's basis therefor,

          (4) if less than all the Outstanding Securities are to be redeemed,
     the identification (and, in the case of partial redemption, the principal
     amounts) of the particular Securities to be redeemed,

          (5) that on the Redemption Date the Redemption Price will become due
     and payable upon each such Security to be redeemed and that interest
     thereon will cease to accrue on and after said date,

          (6) the Conversion Price, the date on which the right to convert the
     Securities to be redeemed will terminate and the place or places where such
     Securities may be surrendered for conversion, and

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<PAGE>   66

          (7) the place or places where such Securities are to be surrendered
     for payment of the Redemption Price.

     Notice of redemption of Securities to be redeemed at the election of the
Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

SECTION 1106.  Deposit of Redemption Price.

     On or prior to 9:00 a.m. New York City time on any Redemption Date, the
Company shall deposit with the Trustee or with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) an amount of money sufficient to pay the Redemption
Price of, and (except if the Redemption Date shall be an Interest Payment Date)
accrued interest on, all the Securities which are to be redeemed on that date
other than any Securities called for redemption on that date which have been
converted prior to the date of such deposit.

     If any Security called for redemption is converted, any money deposited
with the Trustee or with a Paying Agent or so segregated and held in trust for
the redemption of such Security shall (subject to any right of the Holder of
such Security or any Predecessor Security to receive interest as provided in the
last paragraph of Section 307) be paid to the Company on Company Request or, if
then held by the Company, shall be discharged from such trust.

SECTION 1107.  Securities Payable on Redemption Date.

     Notice of redemption having beengiven as aforesaid, the Securities so to be
redeemed shall, on the Redemption Date, become due and payable at the Redemption
Price therein specified, and from and after such date (unless the Company shall
default in the payment of the Redemption Price and accrued interest) such
Securities shall cease to bear interest. Upon surrender of any such Security for
redemption in accordance with said notice, such Security shall be paid by the
Company at the Redemption Price, together with accrued interest to the
Redemption Date; provided, however, that installments of interest whose Stated
Maturity is on or prior to the Redemption Date shall be payable to the Holders
of such Securities, or one or more Predecessor Securities, registered as such at
the close of business on the relevant Record Dates according to their terms and
the provisions of Section 307.

     If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal shall, until paid, bear interest from the
Redemption Date at the rate provided by the Security and such Security shall
remain convertible into Common Stock until the principal of such Security (or
portion thereof, as the case may be) shall have been paid or duly provided for.

SECTION 1108.  Securities Redeemed in Part.

     Any Security which is to be redeemed only in part shall be surrendered at
an office or agency of the Company designated for that purpose pursuant to
Section 1002 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company and
the Trustee duly executed by, the Holderthereof or his attorney duly authorized
in writing), and the Company shall execute, and the Trustee shall authenticate
and deliver to the Holder of such Security without service charge, a new
Security or Securities, of any authorized denomination as requested by such
Holder, in

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<PAGE>   67

aggregate principal amount equal to and in exchange for the unredeemed portion
of the principal of the Security so surrendered.

                                   ARTICLE 12

                            Conversion of Securities

SECTION 1201. Conversion Privilege and Conversion Price.

     Subject to and upon compliance with the provisions of this Article, at the
option of the Holder thereof, any Security maybe converted into fully paid and
nonassessable Common Shares (calculated as to each conversion to the nearest
1/100th of a share) at the Conversion Price, determined as hereinafter provided,
in effect at the time of conversion. Such conversion right may be exercised at
any time, subject, in the case of the conversion of any Global Security, to any
applicable book-entry procedures of the U.S. Depositary therefor. In case a
Security or portion thereof is called for redemption oris delivered for
purchase, such conversion right in respect of the Security or portion so called
or delivered shall expire at the close of business on the Redemption Date or the
Purchase Date, as the case may be, unless the Company defaults in making the
payment due upon redemption or purchase, as the case may be.

     The price at which Common Shares shall be delivered upon conversion (herein
called the "Conversion Price") shall be initially $30.00 per Common Share. The
Conversion Price shall be adjusted in certain instances as provided in this
Article Twelve.

SECTION 1202.  Exercise of Conversion Privilege.

     In order to exercise the conversion privilege, the Holder of any Security
to be converted shall (A) surrender such Security, duly endorsed or assigned to
the Company or in blank, at any office or agency of the Company maintained for
that purpose pursuant to Section 1002, and (B) deliver to such office or agency
a duly signed and completed conversion notice substantially in the form set
forth in Annex A-1, as appropriate, stating that the Holder elects to convert
such Security or, if less than the entire principal amount thereof is to be
converted, the portion thereof to be converted. Each Security surrendered for
conversion (in whole or in part) during the period from the close of business on
any Regular Record Date to the opening of business on the next succeeding
Interest Payment Date (except Securities called for redemption on a Redemption
Date or to be purchased on a Purchase Date during, in each case, such period)
shall be accompanied by payment in same day funds or other funds acceptable to
the Company of an amount equal to the interest payable on such Interest Payment
Date on the principal amount of such Security (or part thereof, as the case may
be) being surrendered for conversion. The interest so payable on such Interest
Payment Date in respect of such Security (or portion thereof, as the case may
be) surrendered for conversion shall be paid to the Holder of such Security as
of such Regular Record Date. Interest payable in respect of any Security
surrendered for conversion on an Interest Payment Date shall be paid to the
Holder of such Security as of the next preceding Regular Record Date,
notwithstanding the exercise of the right of conversion. Except as provided in
this paragraph and subject to the last paragraph of Section 307, no cash payment
or adjustment shall be made upon any conversion on account of, if the date of
conversion is not an Interest Payment Date, any interest accrued from the
Interest Payment Date next preceding the conversion date, in respect of any
Security (or part thereof, as the case may be) surrendered for conversion, or on
account of any dividends on the Common Shares issued upon conversion. The
Company's delivery to the Holder of

                                       57

<PAGE>   68

the number of Common Shares (and cash in lieu of fractions thereof, as provided
in this Indenture) into which a Security is convertible will be deemed to
satisfy the Company's obligation to pay the principal amount of the Security.

     Securities shall be deemed to have been converted immediately prior to the
close of business on the day of surrender of such Securities for conversion (the
"Conversion Date") in accordance with the foregoing provisions, and at such time
the rights of the holders of such Securities as holders shall cease, and the
Person or Persons entitled to receive the Common Shares issuable upon conversion
shall be treated for all purposes as the record holder or holders of such Common
Shares at such time. As promptly as practicable on or after the Conversion Date,
the Company shall issue and deliver to the Trustee, for delivery to the Holder,
a certificate or certificates for the number of full shares of Common Shares
issuable upon conversion, together with payment in lieu of any fraction of a
share, as provided in Section 1203.

     In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in an aggregate principal amount equal to
the unconverted portion of the principal amount of such Security. A Security may
be converted in part, but only if the principal amount of such Security to be
converted is any integral multiple of $1.00.

SECTION 1203.  Fractions of Shares.

     No fractional Common Shareshall be issued upon conversion of any
Securities. If more than one Security shall be surrendered for conversion at one
time by the same Holder, the number of full shares which shall be issuable upon
conversion thereof shall be computed on the basis of the aggregate principal
amount of the Securities (or specified portions thereof) so surrendered. Instead
of any fractional Common Share which would otherwise be issuable upon conversion
of any Securities (or specified portions thereof), the Company shall calculate
and pay a cash adjustment in respect of such fraction (calculated to the nearest
1/100th of a share) in an amount equal to the same fraction of the current
market price per Common Share (calculated in accordance with Section 1204(5)
below) at the close of business on the day of conversion.

SECTION 1204.  Adjustment of Conversion Price.

     The Conversion Price shall be subject to adjustments from time to time as
follows:

     (1) In case the Company shall pay or make a dividend or other distribution
on any class of capital stock of the Company payable in Common Stock, the
Conversion Price in effect at the opening of business on the day following the
date fixed for the determination of stockholders entitled to receive such
dividend or other distribution shall be reduced by multiplying such Conversion
Price by a fraction of which the numerator shall be the number of shares of
Common Stock outstanding at the close of business on the date fixed for such
determination andthe denominator shall be the sum of such number of shares and
the total number of shares constituting such dividend or other distribution,
such reduction to become effective immediately after the opening of business on
the day following the date fixed for such determination. For the purposes of
this paragraph (1), the number of shares of Common Stock at any time outstanding
shall not include shares held in the treasury of the Company but shall include
shares issuable in respect of scrip certificates issued in lieu of fractions of
shares of Common Stock. The Company will not pay any dividend or make any
distribution on shares of Common Stock held in the treasury of the Company.

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<PAGE>   69

     (2) In case outstanding shares of any class of Common Stock shall be
subdivided into a greater number of shares of such class of Common Stock, and,
conversely, in case outstanding shares of any class of Common Stock shall each
be combined into a smaller number of shares of such class of Common Stock, the
Conversion Price in effect at the opening of business on the day following the
day upon which such subdivision or combination becomes effective shall be
adjusted by the Company so that the same shall equal the price determined by
multiplying the Conversion Price in effect immediately prior to the
effectiveness of the Conversion Price adjustment contemplated by this
subparagraph (2) by a fraction of which the numerator shall be the number of
shares of Common Stock outstanding immediately prior to such subdivision or
combination and the denominator shall be the number of shares of Common Stock
outstanding immediately after giving effect to such subdivision or combination,
such adjustment to become effective immediately after the opening of business on
the day following the day upon which such subdivision or combination becomes
effective.

     (3) In case the Company shall, by dividend or otherwise, distribute to all
holders of its Common Stock evidences of its indebtedness, shares of any class
of capital stock, or other property (including securities, but excluding (i) any
rights, options or warrants referred to in Section 1212, (ii) any dividend or
distribution paid exclusively in cash, (iii) any dividend or distribution
referred to in paragraph (1) of this Section and (iv) any merger or
consolidation to which Section 1211 applies), the Conversion Price shall be
adjusted so that the same shall equal the price determined by multiplying the
Conversion Price in effect immediately prior to the close of business on the
date fixed for the determination of stockholders entitled to receive such
distribution by a fraction of which (i) the numerator shall be the current
market price per share (determined as providedin paragraph (5) of this Section)
of theCommon Stock on the third Trading Day prior to the date fixed for such
determination (the "Reference Date") less the then fair market value (as
determined by the Board of Directors, whose determination shall be conclusive
and described in a Board Resolution) on the Reference Date of the portion of the
assets, shares or evidences of indebtedness so distributed applicable to one
share of Common Stock and the denominator shall be the current market price per
share of Common Stock on the Reference Date, such adjustment to become effective
immediately prior to the opening of business on the day following the Reference
Date.

     (4) The reclassification of any class of Common Stock into securities
including other than Common Stock (other than any reclassification upon a
consolidation or merger to which Section 1211 applies) shall be deemed to
involve (a) a distribution of such securities other than Common Stock to all
holders of Common Stock (and the effective date of such reclassification shall
be deemed to be "the date fixed for the determination of stockholders entitled
to receive such distribution" and "the date fixed for such determination" within
the meaning of paragraph (3) of this Section), and (b) a subdivision or
combination, as the case may be, of the number of shares of such class of Common
Stock outstanding immediately prior to such reclassification into the number of
shares of Common Stock outstanding immediately thereafter (and the effective
date of such reclassification shall be deemed to be "the day upon which such
subdivision becomes effective" or "the day upon which such combination becomes
effective", as the case may be, and "the day upon which such subdivision or
combination becomes effective" within the meaning of paragraph (3) of this
Section).

     (5) For the purpose of any computation under paragraph (3) of this Section
1204, the current market price per share of a class of Common Stock on any date
shall be calculated by the Company and be deemed to be the average of the daily
Closing Prices Per Share of such class for the five consecutive Trading Days
selected by the Company commencing not more than 10 Trading Days before,and
ending not later than, the earlier of the day in question and the day before the
"ex" date with respect to the issuance or distribution

                                       59

<PAGE>   70

requiring such computation. For purposes of this paragraph, the term "`ex'
date", when used with respect to any issuance or distribution, means the first
date on which such class of Common Stock trades regular way in the applicable
securities market or on the applicable securities exchange without the right to
receive such issuance or distribution.

     (6) No adjustment in the Conversion Price shall be required unless such
adjustment (plus any adjustments not previously made by reason of this paragraph
(9)) would require an increase or decrease of at least one percent in such
price; provided, however, that any adjustments which by reason of this paragraph
(6) are not required to be made shall be carried forward and taken into account
in any subsequent adjustment. All calculations under this Article shall be made
to the nearest cent or to the nearest one-hundredth of a share, as the case may
be.

     (7) The Company may make such reductions in the Conversion Price, for the
remaining term of the Securities or any shorter term, in addition to those
required by paragraphs (1), (2) and (3) of this Section 1204, as it considers to
be advisable in order to avoid or diminish any income tax to any holders of
Common Shares resulting from any dividend or distribution of stock or issuance
of rights or warrants to purchase or subscribe for stock or from any event
treated as such for income tax purposes.

SECTION 1205.  Notice of Adjustments of Conversion Price.

          Whenever the Conversion Price is adjusted as herein provided:

          (1) the Company shall compute the adjusted Conversion Price in
     accordance with Section 1204 and shall prepare a certificate signed by the
     Treasurer ofthe Company setting forth the adjusted Conversion Price and
     showing in reasonable detail the facts upon which such adjustment is based,
     and such certificate shall promptly be filed with the Trustee and with each
     Conversion Agent; and

          (2) a notice stating that the Conversion Price has been adjusted and
     setting forth the adjusted Conversion Price shall forthwith be required,
     and as soon as practicable after it is required, such notice shall be
     provided by the Company to all holders in accordance with Section 106.

Neither the Trustee nor any Conversion Agent shall be under any duty or
responsibility with respect to any such certificate or the information and
calculations contained therein, except to exhibit the same to any Holder of
Securities desiring inspection thereof at its office during normal business
hours.

SECTION 1206.  Notice of Certain Corporate Action.

          In case:

          (a) the Company shall declare a dividend (or any other distribution)
     on any class of its Common Stock payable otherwise than exclusively in
     cash; or

          (b) the Company shall authorize the granting to all holders of any
     class of its Common Stock of rights, options or warrants to subscribe for
     or purchase any shares of Capital Stock of any class or of any other
     rights; or

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          (c) of any reclassification of any class of Common Stock of the
     Company (other than a subdivision or combination of its outstanding shares
     of Common Stock), or of any consolidation or merger to which the Company is
     a party and for which approval of any stockholders of the Company is
     required, or of the sale or transfer of all or substantially all of the
     assets of the Company; or

          (d) of the voluntary or involuntary dissolution, liquidation or
     winding up of the Company;

then the Company shall cause to be filed at each office or agency maintained for
the purpose of conversion of Securities pursuant to Section 1002, and shall
cause to be provided to all holders in accordance with Section 106, at least 20
days (or 10 days in any case specified in clause (a) or (b) above) prior to the
applicable record, expiration or effective date hereinafter specified, a notice
stating (x) the date on which a record is to be taken for the purpose of such
dividend, distribution, rights, options or warrants, or, if a record is not to
be taken, the date as of which the holders of Common Stock of record to be
entitled to such dividend, distribution, rights, options or warrants are to be
determined, (y) the date on which the right to make tenders under such tender
offer expires or (z) the date on which such reclassification, consolidation,
merger, share exchange, conveyance, transfer, sale, lease, dissolution,
liquidation or winding up is expected to become effective, and the date as of
which it is expected that holders of Common Stock of record shall be entitled to
exchange their shares of Common Stock for securities, cash or other property
deliverable upon such reclassification, consolidation, merger, share exchange,
conveyance, transfer, sale, lease, dissolution, liquidation or winding up. If at
the time the Trustee shall not be the conversion agent, a copy of such notice
and any notice referred to in the following paragraph shall also forthwith be
filed by the Company with the Trustee.

SECTION 1207.  Company to Reserve Common Shares.

     The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Shares, for the
purpose of effecting the conversion of Securities, the full number of Common
Shares then issuable upon the conversion of all Outstanding Securities.

SECTION 1208.  Taxes on Conversions.

     The Company will pay any and all taxes and duties that may be payable in
respect of the issue or delivery of shares of Common Shares on conversion of
Securities pursuant hereto. The Company shall not, however, be required to pay
any tax or duty which may be payable in respect of any transfer involved in the
issue and delivery of shares of Common Shares in a name other than that of the
Holder of the Security or Securities to be converted, and no such issue or
delivery shall be made unless and until the Person requesting such issue has
paid to the Company the amount of any such tax or duty, or has established to
the satisfaction of the Company that such tax or duty has been paid.

SECTION 1209.  Covenant as to Common Shares.

     The Company agrees that all Common Shares which may be delivered upon
conversion of Securities, upon such delivery, will have been duly authorized and
validly issued and will be fully paid and nonassessable and free of any liens,
charges or adverse claims.

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SECTION 1210.  Cancellation of Converted Securities.

     All Securities delivered for conversion shall be delivered to the Trustee
or its agent to be canceled by or at the direction of the Trustee, which shall
dispose of the same as provided in Section 308.

SECTION 1211.  Provision in Case of Consolidation, Merger or Sale of Assets.

     In case of any consolidation of the Company with, or merger of the Company
into, any other Person, any merger of another Person into the Company (other
than a merger which does not result in any reclassification, conversion,
exchange or cancellation of outstanding Common Shares of the Company) or any
sale or transfer of all or substantially all of the assets of the Company, the
Person formed by such consolidation or resulting from such merger or which
acquires such assets, as the case may be, shall execute and deliver to the
Trustee a supplemental indenture providing that the Holder of each Security then
Outstanding shall have the right thereafter, during the period such Security
shall be convertible as specified in Section 1201, to convert such Security only
into the kind and amount of securities, cash and other property receivable upon
such consolidation, merger, sale or transfer by a holder of the number of shares
of Common Shares of the Company into which such Security might have been
converted immediately prior to such consolidation, merger, sale or transfer, and
assuming such holder of Common Shares of the Company (i) is not a Person with
which the Company consolidated or into which the Company merged or which merged
into the Company or to which such sale or transfer was made, as the case may be
("Constituent Person"), or an Affiliate of a Constituent Person and (ii) failed
to exercise his rights of election, if any, as to the kind or amount of
securities, cash and other property receivable upon such consolidation, merger,
sale or transfer (provided that if the kind or amount of securities, cash and
other property receivable upon such consolidation, merger, sale or transfer is
not the same for each Common Share of the Company held immediately prior to such
consolidation, merger, sale or transfer by Persons other than a Constituent
Person or an Affiliate thereof and in respect of which such rights of election
shall not have been exercised ("Non-electing Share"), then for the purpose of
this Section 1211 the kind and amount of securities, cash and other property
receivable upon such consolidation, merger, sale or transfer by the holders of
each Non-electing Share shall be deemed to be the kind and amount so receivable
per share by a plurality of the Non-electing Shares). Such supplemental
indenture shall provide for adjustments which, for events subsequent to the
effective date of such supplemental indenture, shall be as nearly equivalent as
may be practicable to the adjustments provided for in this Article. The above
provisions of this Section 1211 shall similarly apply to successive
consolidations, mergers, sales or transfers. Notice of the execution of such a
supplemental indenture shall be given by the Company to the Holder of each
Security as provided in Section 106 promptly upon such execution.

SECTION 1212.  Issuance of Rights, Options or Warrants.

     The Company shall not issue any rights, options or warrants to holders of
any class of Common Stock entitling them to subscribe for or purchase additional
shares of any class of Common Stock unless the Company shall contemporaneously
issue to Holders of the Securities such number of such rights, options or
warrants as is equal to (a) the number of rights, options or warrants, per share
of Common Stock, issued to the holders thereof, multiplied by (b) the number of
Common Shares into which the Securities held by such Holder are then
convertible. The record date for the determination of Holders of Securities
entitled to such issuance of rights, options or warrants shall be the record
date for the determination of holders of Common Stock entitled to the issuance
of such rights, options or warrants.

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SECTION 1213.  Responsibility of Trustee.

     Neither the Trustee nor any authenticating agent nor any Conversion Agent
shall at any time be under any duty or responsibility to any Holder of
Securities to determine whether any facts exist which may require any adjustment
of the Conversion Price, or with respect to the nature or extent of any such
adjustment when made, or with respect to the method employed, or herein or in
any supplemental indenture provided to be employed, in making the same. Neither
the Trustee nor any authenticating agent nor any Conversion Agent shall be
accountable with respect to the validity or value (or the kind or amount) of any
Common Shares, or of any securities or property, which may at any time be issued
or delivered upon the conversion of any Securities; and neither the Trustee nor
any authenticating agent nor any Conversion Agent makes any representation with
respect thereto. Neither the Trustee nor any authenticating agent nor any
Conversion Agent shall be responsible for any failure of the Company to issue,
transfer or deliver any Common Shares or stock certificates or other securities
or property or cash upon the surrender of any Securities for the purpose of
conversion or to comply with any of the covenants of the Company contained in
this Article.

                                   ARTICLE 13

                          Subordination of Securities

SECTION 1301.  Securities Subordinated to Senior Indebtedness.

     All Securities issued under this Indenture shall be issued subject to the
following provisions and each Holder of any Security whether upon original issue
or upon transfer or assignment thereof accepts and agrees to be bound by such
provisions.

     All Securities issued hereunder shall, to the extent and in the manner
hereinafter set forth, be subordinated and subject in right of payment to the
prior payment in full in cash of all Senior Indebtedness and termination of all
commitments under the Exit Facility. "Senior Indebtedness" means (i) the
principal, premium, if any, and interest (regardless whether such interest is an
allowable claim after the commencement of any dissolution or winding up or total
or partial liquidation or reorganization of the Company, whether voluntary or
involuntary or in bankruptcy, insolvency, receivership or other proceedings) in
respect of indebtedness of the Company, whether outstanding on the date of the
Indenture or thereafter incurred, for money borrowed or pursuant to any
obligation of the Company for the reimbursement on any letter of credit, bankers
acceptance, security purchase facility or similar credit transaction, in each
case pursuant to (A) a credit facility with or agented by, a Bank, or (B)
pursuant to the Credit Agreement or the Exit Facility, (ii) any amendments,
renewals, extensions, refinancings, replacements or refundings of any
obligations of the type referred to in clause (i) above (regardless of whether
such amendment, renewal, extension, refinancing, replacement or refunding is
pursuant to a credit facility with or agented by a Bank), (iii) all obligations
of the type referred to in clauses (i) and (ii) above of any Affiliate of the
Company for the payment of which the Company is responsible or liable as
obligor, guarantor or otherwise, and (iv) all obligations of the type referred
to in clauses (i) through (iii) above of any Affiliate of the Company secured by
any lien on any property or asset of the Company (whether or not such obligation
is assumed by the Company), except for any such indebtedness or other obligation
that is by its terms subordinated to or pari passu with the Securities.

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SECTION 1302.  No Payments in Certain Circumstances;
               Payment Over of Proceeds Upon Dissolution, Etc.

     No payment on account of principal of, premium, if any, or interest on, or
redemption or purchase (including without limitation, a purchase pursuant to
Article 14 of this Indenture) of, the Securities shall be made if, at the time
of such payment or immediately after giving effect thereto: (i) there shall
exist a default in the payment of principal of, premium, if any, sinking funds
or interest (including a default under any purchase or redemption obligations or
a default in the payment of interest after the commencement of any dissolution
or winding up or total or partial liquidation or reorganization of the Company,
whether voluntary or involuntary or in bankruptcy, insolvency, receivership or
other proceeding at the rate specified in the applicable Senior Indebtedness,
whether or not such interest is an allowable claim in such proceeding) with
respect to any Senior Indebtedness, or (ii) there shall have occurred an event
of default (other than a default in the payment of principal, premium, if any,
sinking funds or interest) with respect to any Senior Indebtedness, as defined
therein or in the instrument under which the same is outstanding, permitting the
holders thereof to accelerate the maturity thereof and such event of default
shall not have been cured or waived or shall not have ceased to exist.
Notwithstanding the foregoing, the Company may make, and the Trustee may receive
and shall apply, any payment in respect of the Securities (for principal,
premium, if any, or interest or purchase) if such payment was made prior to the
occurrence of any of the contingencies specified in clauses (i) and (ii) above.

     Upon (i) any acceleration of the principal amount due on the Securities or
(ii) any payment or distribution of assets of the Company of any kind or
character, whether in cash, property or securities, to creditors upon any
dissolution or winding up or total or partial liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all principal of, premium, if any, sinking
fund and interest due or to become due upon all Senior Indebtedness shall first
be paid in full (including interest after the commencement of any such
proceeding at the rate specified in the applicable Senior Indebtedness, whether
or not such interest is an allowable claim in such proceeding), or payment
thereof provided for in cash in accordance with its terms, before any payment is
made on account of the principal of, or interest on, or purchase of, the
indebtedness evidenced by the Securities, and upon any such dissolution or
winding up or liquidation or reorganization any payment or distribution of
assets of the Company of any kind or character, whether in cash, property or
securities, to which the holders of the Securities or the Trustee under this
Indenture would be entitled, except for the provisions hereof, shall be paid by
the Company or by any receiver, trustee in bankruptcy, liquidating trustee,
agent or other Person making such payment or distribution, or by the holders of
the Securities or by the Trustee under this Indenture if received by them or it,
as the case may be, directly to the holders of Senior Indebtedness (in
accordance with their relative priority and otherwise pro rata to each such
holder on the basis of the respective amounts of Senior Indebtedness held by
such holder) or their representatives, to the extent necessary to pay all Senior
Indebtedness in full (including interest after the commencement of any
dissolution or winding up or total or partial liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, at the rate specified in the applicable
Senior Indebtedness, whether or not such interest is an allowable claim in such
proceeding), in money or money's worth, after giving effect to any concurrent
payment or distribution to or for the holders of Senior Indebtedness, before any
payment or distribution is made to the holders of the Securities or to the
Trustee under this Indenture.

     If any default or event described in the first paragraph of this Section
1302 shall have occurred, any payment or distribution of assets of the Company
of any kind or character, whether in cash,

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property or securities, received by the Trustee or the holders of the Securities
before all Senior Indebtedness is paid in full (including interest after the
commencement of any such proceeding at the rate specified in the applicable
Senior Indebtedness, whether or not such interest is an allowable claim in such
proceeding) or provision made for such payment, in accordance with its terms
shall be held in trust for the benefit of, and shall be paid over or delivered
to, the holders of such Senior Indebtedness or their representative or
representatives, or to the trustee or trustees under any indenture pursuantto
which any instruments evidencing any of such Senior Indebtedness have been
issued, as their respective interests may appear, for application to the payment
of all Senior Indebtedness remaining unpaid to the extent necessary to pay all
such Senior Indebtedness in full in accordance with its terms (including
interest after the commencement of any dissolution or winding up or total or
partial liquidation or reorganization of the Company, whether voluntary or
involuntary or in bankruptcy, insolvency, receivership or other proceedings, at
the rate specified in the applicable Senior Indebtedness, whether or not such
interest is an allowable claim in such proceeding), after giving effect to any
concurrent payment or distribution to or for the holders of such Senior
Indebtedness.

     Subject to the payment in full of all Senior Indebtedness, including the
payment of any interest in respect of any interest payment date occurring after
the commencement of any dissolution or winding up or total or partial
liquidation or reorganization of the Company, whether voluntary or involuntary
or in bankruptcy, insolvency, receivership or other proceeding, the holders of
the Securities (together with the holders of any other indebtedness of the
Company which is subordinated in right of payment to the payment in full of all
Senior Indebtedness, which is not subordinated in right of payment to the
Securities and which by its terms grants such right of subrogation to the
holders thereof) shall be subrogated to the rights of the holders of Senior
Indebtedness to receive payments or distributions of assets of the Company made
on the Senior Indebtedness until the principal of, premium, if any, and interest
on, or purchase of, the Securities shall be paid in full; and, for the purposes
of such subrogation, no payments or distributions to the holders of Senior
Indebtedness of any cash, property or securities to which the holders of the
Securities or the Trustee would be entitled except for the provisions of this
Article, and no payment over pursuant to the provisions of this Article to the
holders of Senior Indebtedness by the holders of the Securities or the Trustee,
shall, as between the Company, its creditors other than the holders of Senior
Indebtedness, and the holders of Securities, be deemed to be a payment by the
Company to the holders of or on account of Senior Indebtedness, it being
understood that the provisions of this Article are and are intended solely for
the purpose of defining the relative rights of the holders of the Securities, on
the one hand, and the holders of Senior Indebtedness, on the other hand.

SECTION 1303.  Notice to Trustee of Specified Events;
               Reliance on Certificate of Liquidating Agent.

     The Company shall give prompt written notice to the Trustee of any
insolvency or bankruptcy proceeding in respect of the Company, of any
proceedings for voluntary liquidation, dissolution or other winding up of the
Company (whether or not involving insolvency or bankruptcy), of the declaration
of any Security as due and payable before its expressed maturity, and of any
event which pursuant to Section 1302 would prevent payment by the Company on
account of the principal, or interest on, or purchase of, the Securities. The
Trustee, subject to the provisions of Section 601, shall be entitled to assume
that no such event has occurred unless the Company, or a holder of Senior
Indebtedness, or any trustee therefor, has given such notice.

     Upon any distribution of assets of the Company or payment by or on behalf
of the Company referred to in this Article, the Trustee and the holders of the
Securities shall be entitled to rely upon any order

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or decree of a court of competent jurisdiction in which any proceedings of the
nature referred to in Section 1302 are pending, and the Trustee, subject to the
provisions of Section 601, and the holders of the Securities shall be entitled
to rely upon a certificate of the liquidating trustee or agent or other Person
making any distribution to the Trustee or to the holders of the Securities for
the purpose of ascertaining the Persons entitled to participate in such
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article.
In the event that the Trustee determines, in good faith, that further evidence
is required with respect to the right of any Person as a holder of Senior
Indebtedness to participate in any payment or distribution pursuant to this
Article, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness
held by such Person, as to the extent to which such Person is entitled to
participate in such payment or distribution, and as to other facts pertinent to
the rights of such Person under this Article, and if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

     The Trustee shall be entitled to rely on the delivery to it of a written
notice by a Person representing itself to be a holder of Senior Indebtedness (or
a trustee on behalf of such holder) to establish that such notice has been given
by a holder of Senior Indebtedness or a trustee on behalf of any such holder or
holders. In the event that the Trustee determines in good faith that further
evidence is required with respect to the right of any Person as a holder of
Senior Indebtedness to participate in any payment or distribution pursuant to
this Article Thirteen, the Trustee may request such Person to furnish evidence
to the reasonable satisfaction of the Trustee as to the amountof Senior
Indebtedness held by such Person, the extent to which such Person is entitled to
participate in such payment or distribution and any other facts pertinent to the
rights of such Person under this Article Thirteen and, if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

SECTION 1304.  Trustee to Effectuate Subordination.

     The Holder of each Security by its acceptance thereof authorizes and
directs the Trustee on its behalf to take such action as may be necessary or
appropriate to acknowledge or effectuate the subordination as provided in this
Article and appoints the Trustee as attorney-in-fact for any and all such
purposes.

SECTION 1305.  Trustee Not Charged with Knowledge of Prohibition.

     Notwithstanding the provisions of this Article or any other provision of
this Indenture, but subject to the provisions of Section 601 as between the
holders of Securities and the Trustee, neither the Trustee nor any Paying Agent
shall be charged with knowledge of any facts which would prohibit the making of
any payment of moneys to or by the Trustee or any such Paying Agent, unless and
until the Trustee or such Paying Agent shall have received written notice
thereof at its Corporate Trust Office from the Company or any holder of Senior
Indebtedness or the trustee or representative of any holder of such Senior
Indebtedness on his behalf; and, prior to the receipt of any such written
notice, the Trustee and any such Paying Agent shall be entitled to assume that
no such facts exist. If the Trustee or Paying Agent, as the case may be, shall
not have received, at least three Business Days prior to the date upon which by
the terms hereof any such moneys may become payable for any purpose (including,
without limitation, the payment of the principal of, premium, if any, or the
interest on any Security) with respect to such moneys, the notice provided for
in this

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Section, then, anything herein contained to the contrary notwithstanding, the
Trustee and such Paying Agent, as the case may be, shall have full power and
authority to receive such moneys and to apply the same to the purpose for which
they were received and shall not be affected by any notice to the contrary which
may be received by it within three Business Days prior to such date.

SECTION 1306.  Trustee Not Fiduciary for Holders of Senior Indebtedness.

     The Trustee shall not be deemed to owe any fiduciary duty to the holders of
Senior Indebtedness and shall not be liable to any such holders if it shall in
good faith mistakenly pay over or distribute to holders of Securities or to the
Company or to any other Person cash, property or securities to which any holders
of Senior Indebtedness shall be entitled by virtue of this Article or otherwise.

     With respect to the holders of Senior Indebtedness, the Trustee undertakes
to perform or to observe only such of its covenants or obligations as are
specifically set forth in this Article and no implied covenants or obligations
with respect to holders of Senior Indebtedness shall be read into this Indenture
against the Trustee.

SECTION 1307.  Rights of Trustee as Holder of Senior Indebtedness;
               Preservation of Trustee's Rights.

     The Trustee in its individual capacity shall be entitled to all the rights
set forth in this Article with respect to any Senior Indebtedness which may at
any time be held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder.

     Nothing in this Article shall apply to claims of, or payments to,
theTrustee under or pursuant to Section 607.

SECTION 1308.  Article Applicable to Paying Agents.

     In case at any time any Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article shall in such case (unless the context otherwise requires)
be construed as extending to and including such Paying Agent within its meaning
as fully for all intents and purposes as if such Paying Agent were namedin this
Article in addition to or in place of the Trustee; provided, however, that
Sections 1305, 1306 and 1307 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

SECTION 1309.  Certain Conversions Deemed Payment.

     For the purposes of this Article only, (1) the issuance and delivery of
junior securities upon conversion of Securities in accordance with Article
Twelve shall not be deemed to constitute a payment or distribution on account of
the principal of or premium or interest on Securities or on account of the
purchase or other acquisition of Securities, and (2) the payment, issuance or
delivery of cash, property or securities (other than junior securities) upon
conversion of a Security shall be deemed to constitute payment on account of the
principal of such Security. For the purposes of this Section, the term "junior
securities" means Common Shares and any other cash, property or securities into
which the Securities are convertible pursuant to Article Twelve. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities is
intended to or

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shall impair, as among the Company, its creditors other than holders of Senior
Indebtedness and the holders of the Securities, the right, which is absolute and
unconditional, of the Holder of any Security to convert such Security in
accordance with Article Twelve.

                                   ARTICLE 14

                               Change of Control

SECTION 1401. Change of Control.

     (a) Within 30 days of the occurrence of a Change of Control, the Company
will be required to mail an Offer with respect to an Offer to Purchase all
Outstanding Securities at the Purchase Price thereof plus accrued interest to
the Purchase Date (provided, however, that installments of interest whose Stated
Maturity is on or prior to the Purchase Date shall be payable to the Holders of
such Securities, or one or more Predecessor Securities, registered as such at
the close of business on the relevant Record Dates according to their terms and
the provisions of Section 307). Each Holder shall be entitled to tender all or
any portion of the Securities owned by such Holder pursuant to the Offer to
Purchase, subject to the requirement that any portion of a Security tendered
must be tendered in an integral multiple of $1.00 principal amount.

     (b) The Company and the Trustee shall perform their respective obligations
specified in the Offer for an Offer to Purchase. Subject to Article 13 and
Section 1403 hereof, prior to the Purchase Date, the Company shall (i) accept
for payment all Securities or portions thereof tendered pursuant to the Offer,
(ii) deposit with the Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 1003) money
sufficient to pay the purchase price of all Securities or portions thereof so
accepted and (iii) deliver or cause to be delivered to the Trustee all
Securities so accepted together with an Officers' Certificate stating the
Securities or portions thereof accepted for payment by the Company. The Paying
Agent shall promptly mail or deliver to Holders of Securities so accepted
payment in an amount equal to the purchase price, and the Trustee shall promptly
authenticate and mail or deliver to such Holders a new Security or Securities
equal in principal amount to any unpurchased portion of the Securitysurrendered
as requested by the Holder. Any Security not accepted for payment shall be
promptly mailed or delivered by the Company to the Holder thereof. The Company
shall publicly announce the results of the Offer on or as soon as practicable
after the Purchase Date.

     (c) Any Offer to Purchase shall be governed by and effected in accordance
with the Offer for such Offer to Purchase.

SECTION 1402.  Certain Definitions.

     For purposes of this Article 14,

     (1) "beneficial owner" shall be determined in accordance with Rule 13d-3,
as in effect on the date of the original execution of this Indenture,
promulgated by the Commission pursuant to the Exchange Act;

     (2) a "Change of Control" shall be deemed to have occurred (unless the
Company is discharged from its obligations with respect to the Securities in
accordance with Article 4) at the time, after

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the original issuance of the Securities, of: (i) an event or series of events by
which any Person or other entity or Group of Persons (other than a Permitted
Holder) (such Person or group of Persons, an "Acquiror") shall, as a result of
(A) a tender or exchange offer, open market purchases or privately negotiated
purchases, or (B) a merger, consolidation or otherwise, have become the
beneficial owner of more than 50% of the aggregate voting power of all classes
of Voting Stock of the Company; or (ii) the Company is consolidated with or
merged into another corporation with the effect that immediately after such
transaction the shareholders of the Company immediately prior to such
transaction beneficially own less than a majority of the voting power of all
classes of Voting Stock of the Person surviving such transaction, and the
Acquiror beneficially owns more than a majority of the voting power of all
classes of Voting Stock of the Person surviving such transaction;

     (3) "Offer" has the meaning specified in the definition of Offer to
Purchase.

     (4) "Offer Expiration Date" has the meaning specified in the definition of
Offer to Purchase.

     (5) "Offer to Purchase" means a written offer (the "Offer") sentby the
Company by first class mail, postage prepaid, to each Holder at its address
appearing in the Securities Register on the date of the Offer. Unless otherwise
required by applicable law, the Offer shall specify an expiration date (the
"Offer Expiration Date") of the Offer to Purchase which shall be, subject to any
contrary requirements of applicable law, not less than 30 days or more than 60
days after the date of such Offer and a settlement date (the "Purchase Date")
for purchase of Securities within five Business Days after the Offer Expiration
Date; provided that, if the Offer Expiration Date occurs during a Deferral
Period, the Purchase Date shall be the fifth Business Day after the termination
of the Deferral Period. The Company shall notify the Trustee at least 15
Business Days (or such shorter period as is acceptable to the Trustee) prior to
the mailing of the Offer of the Company's obligation to make an Offer to
Purchase, and the Offer shall be mailed by the Company or, at the Company's
request, by the Trustee in the name and at the expense of the Company. The Offer
shall contain information concerning the business of the Company and its
Restricted Subsidiaries which the Company in good faith believes will enable
such Holders to make an informed decision with respect to the Offer to Purchase.
The Offer shall contain all instructions and materials necessary to enable such
Holders to tender Securities pursuant to the Offer to Purchase. The Offer shall
also state:

          (A) the Offer Expiration Date, the Purchase Date and, if applicable,
     the Deferral Period;

          (B) the Purchase Price;

          (C) that the Holder may tender all or any portion of the Securities
     registered in the name of such Holder and that any portion of a Security
     tendered must be tendered in an integral multiple of $1.00 principal
     amount;

          (D) the place or places where Securities are to be surrendered for
     tender pursuant to the Offer to Purchase;

          (E) that interest (including Deferral Period Interest) on any Security
     not tendered or tendered but not purchased by the Company pursuant to the
     Offer to Purchase will continue to accrue;

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          (F) that, subject to any Deferral Period, on the Purchase Date the
     Purchase Price will become due and payable upon each Security being
     accepted for payment pursuant tothe Offer to Purchase and that interest
     thereon shall cease to accrue on and after the Purchase Date;

          (G) the Conversion Price then in effect, the date on which the right
     to convert the principal amount of the Securities to be purchased will
     terminate and the place or places where such Securities may be surrendered
     for conversion;

          (H) that each Holder electing to tender a Security pursuant to the
     Offer to Purchase will be required to surrender such Security at the place
     or places specified in the Offer prior to the close of business on the
     Offer Expiration Date (such Security being, if the Company or the Trustee
     so requires, duly endorsed by, or accompanied by a written instrument of
     transfer in form satisfactory to the Company and the Trustee duly executed
     by, the Holder thereof or his attorney duly authorized in writing);

          (I) that Holders will be entitled to withdraw allor any portion of
     Securities tendered if the Company (or the Paying Agent) receives, not
     later than the close of business on the Offer Expiration Date a telegram,
     telex, facsimile transmission or letter setting forth the name of the
     Holder, the principal amount of the Security the Holder tendered, the
     certificate number of the Security the Holder tendered and a statement that
     such Holder is withdrawing all or a portion of its tender;

          (J) that, subject to the Deferral Period, if less than all of the
     Outstanding Securities are duly tendered and not withdrawn pursuant to the
     Offer to Purchase, the Company shall purchase all such Securities; and

          (K) that in the case of any Holder whose Security is purchased only in
     part, the Company shall execute, and the Trustee shall authenticate and
     deliver to the Holder of such Security without service charge, a new
     Security or Securities, of any authorized denomination as requested by such
     Holder, in an aggregate principal amount equal to and in exchange for the
     unpurchased portion of the Security so tendered.

     (6) "Person" or "Group of Persons" shall include any syndicate or group
which would be deemed to be a "person" under Section 13(d)(3) of the Exchange
Act, as in effect on the date of the original execution of this Indenture.

                                       70

<PAGE>   81

     (7) "Purchase Price" means the following prices (expressed as percentages
of the principal amount) if the Purchase Date is during the 12-month period
beginning April 15 of each of the years indicated below:

<TABLE>
<CAPTION>
                                            Purchase
                    Year                      Price
                    ----                    ---------
                    <S>                     <C>
                    2000                    64.45915%
                    2001                    68.32670%
                    2002                    72.42630%
                    2003                    76.77187%
                    2004                    81.37819%
                    2005                    86.26088%
                    2006                    88.84870%
                    2007                    91.51417%
                    2008                    94.25959%
                    2009                    97.08738%
</TABLE>

and thereafter at a price equal to 100% of the principal amount.

SECTION 1403.  Deferral Period.

     Notwithstanding the provisions of Sections 1401 and 1402 hereof, during a
Deferral Period, the Company shall not be required to accept for payment or
purchase any Securities tendered pursuant to an Offer. A Holder whose Securities
have been tendered pursuant to an Offer may not withdraw its Securities during
the Deferral Period.

                                _______________

     This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.

                                       71

<PAGE>   82

     IN WITNESS WHEREOF, the parties hereto have caused this Indenture tobe duly
executed, all as of the day and year first above written.

                                        PHILIP SERVICES CORPORATION

                                        By: /s/ P.C. Widman
                                            ------------------------------------
                                            Name:  Phillip Widman
                                            Title: Executive Vice President and
                                                   Chief Financial Officer

                                        WILMINGTON TRUST COMPANY

                                        By: /s/ James D. Nesci
                                            ------------------------------------
                                            Name:  James D. Nesci
                                            Title: Authorized Signer

<PAGE>   83

                                                                       ANNEX A-1

                            FORM OF CONVERSION NOTICE

Wilmington Trust Company
   as Conversion Agent
Rodney Square North
1100 North Market Street
Wilmington, Delaware 19890
Attention: Corporate Trust Administration

               Re: Philip Services Corporation
                   3% Convertible Subordinated Notes
                   Due April 15, 2020 (the "Securities")
                   -------------------------------------

     Reference is hereby made to the Indenture, dated as of April 7, 2000 (the
"Indenture"), between Philip Services Corporation as Issuer, and Wilmington
Trust Company, as Trustee. Capitalized terms used but not defined herein shall
have the meanings given to them in the Indenture.

     This letter relates to the Securities specified below, which are registered
in the name of the undersigned (the "Holder"). The Holder hereby irrevocably
exercises its right to convert such Securities, or the portion thereof, if any,
specified below, into Common Shares and, as specified below, directs that such
Shares, together with any check in payment for a fractional share and any
Security representing any unconverted principal amount, be issued and delivered
[in book-entry form through the facilities of the Depositary, for credit to the
account(s) of the Person(s)] [in certificated form to the Registered Owner(s)]
indicated below. The Holder understands that, subject to certain limited
exceptions specified in the Indenture, owners of beneficial interests in a
Global Security must hold any Security representing any unconverted principal
amount in book-entry form.

     The Holder acknowledges and agrees that no Common Shares will be delivered
upon conversion of such Securities until any amount payable by the Holder on
account of interest is paid, any certificates evidencing specified Securities
not held in book-entry form are

                                      A-1-1

<PAGE>   84

duly endorsed or assigned to the Company or in blank and surrendered and any
taxes or other charges or documents required in connection with a transfer on
conversion, and any other required items, are delivered to the Conversion Agent.

     Conversion of the specified Securities is subject to the requirements
established by the Company and the Trustee pursuant to the Indenture, as well as
to the procedures of the U.S. Depository if such Securities are held or to be
held in book-entry form, all as in effect from time to time. The specified
Securities will be deemed to have been converted immediately prior to the close
of business on the first day on which this conversion notice and all other
required items have been delivered to the Conversion Agent as provided above
and, upon such conversion, shall cease to accrue interest or be Outstanding.

                                     A-1-2

<PAGE>   85

            Please provide the information requested below, as applicable.

(1)  PLEASE SPECIFY THE SECURITIES HELD AND THE PORTION THEREOF TO BE CONVERTED;

     Principal amount held: U.S.$ ______________________________________________

     CUSIP number(s): __________________________________________________________

     Depositary account where held
          (if applicable): _____________________________________________________

     Principal amount being converted (if less than all):
          U.S. $ _______________________________________________________________

     All Securities to be converted will be converted into Common Shares and
     (together with any unconverted Securities) will be delivered as specified
     in Item 2 below.

     (2)  Please specify the type, number and form of securities to be delivered
          on conversion and the name(s) of the account holder(s) or registered
          owner(s), by checking the appropriate boxes and providing the
          information requested:

               [ ]  Book Entry

                    Number of Common Shares: ___________________________________
                    Depositary Account: ________________________________________

               [ ]  Certificates

                    Number of Common Shares: ___________________________________
                    Registered Owner: __________________________________________

               [ ]  Unconverted Book Entry

                    Principal Amount: U.S.$ ___________________________________1
                    Depositary Account: ________________________________________

               [ ]  Unconverted Certificates

                    (only in certain instances
                    defined in the Indenture)
                    Principal Amount: U.S.$ ___________________________________*
                    Registered Owner: __________________________________________

          Please sign and date this notice in the space provided below.

_______________

1 Aggregate principal amount of each certificate must equal U.S. $1.00 or any
  integral multiple thereof.

                                      A-1-3

<PAGE>   86

DATE:                                   ________________________________________
                                                    Name of Holder

                                        ________________________________________
                                                Signature(s) of Holder
                                                Title(s):

                                        (If the Holder is a corporation,
                                        partnership or fiduciary, the title of
                                        the Person signing on behalf of the
                                        Holder must be stated.)

Signature(s) must be guaranteed by an institution which is a member of the
following recognized signature guarantee programs: (i) the Securities Transfer
Agent Medallion Program, (ii) the New York Stock Exchange Medallion Program,
(iii) the Stock Exchange Medallion Program or (iv) another guarantee program
reasonably acceptable to the Conversion Agent, if Common Shares or unconverted
Securities are to be delivered other than to and in the name of the registered
owner.

________________________________________
          Signature Guarantee

                                      A-1-4

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