Exhibit No. 4(g)




                        ICF KAISER INTERNATIONAL, INC.,

                                   as Issuer

                                      and

                             THE BANK OF NEW YORK,

                                  as Trustee

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

                                   INDENTURE

                         Dated as of December 23, 1996

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



                                  $15,000,000

                      12% Senior Notes due 2003, Series A

                                      and

                      12% Senior Notes due 2003, Series B

 
                               TABLE OF CONTENTS




ARTICLE 1   DEFINITIONS AND INCORPORATION
            BY REFERENCE
     Section 1.01  Definitions............................................
     Section 1.02  Other Definitions......................................
     Section 1.03  Incorporation by Reference of Trust
                     Indenture Act........................................
     Section 1.04  Rules of Construction..................................

ARTICLE 2   THE NOTES
     Section 2.01  Form and Dating........................................
     Section 2.02  Execution and Authentication...........................
     Section 2.03  Registrar and Paying Agent.............................
     Section 2.04  Paying Agent to Hold Money in Trust....................
     Section 2.05  Registration of Transfer and Exchange..................
     Section 2.06  Replacement Notes......................................
     Section 2.07  Outstanding Notes......................................
     Section 2.08  Treasury Notes.........................................
     Section 2.09  Temporary Notes........................................
     Section 2.10  Cancellation...........................................
     Section 2.11  Defaulted Interest.....................................
     Section 2.12  CUSIP Numbers..........................................
     Section 2.13  Book-Entry Provisions for Global Notes.................

ARTICLE 3   ASSET SALE OFFER
     Section 3.01  Notices to Trustee.....................................
     Section 3.02  Notices to Holders.....................................
     Section 3.03  Deposit of Purchase Price..............................
     Section 3.04  Asset Sale Offer.......................................

ARTICLE 4   OPTIONAL REDEMPTION
     Section 4.01  Redemption Date; Redemption Price......................
     Section 4.02  Notices to Trustee and Paying Agent....................
     Section 4.03  Selection of Notes to be Redeemed......................
     Section 4.04  Notice to Holders......................................
     Section 4.05  Effect of Notice of Redemption.........................
     Section 4.06  Deposit of Redemption Price............................
     Section 4.07  Notes Redeemed in Part.................................

ARTICLE 5   COVENANTS
     Section 5.01  Payment of Notes.......................................
     Section 5.02  Maintenance of Office or Agency........................
     Section 5.03  Change of Control......................................
     Section 5.04  Limitations on Additional Indebtedness.................
     Section 5.05  Limitations on Subsidiary Debt and
                     Preferred Stock......................................
     Section 5.06  Limitations on Restricted Payments.....................
     Section 5.07  Limitations on Restrictions on 
                     Distributions from Subsidiaries......................

 
     Section 5.08  Limitations on Transactions
                     With Affiliates......................................
     Section 5.09  Limitations on Asset Sales.............................
     Section 5.10  Restrictions on Sale of Stock of
                     Subsidiaries.........................................
     Section 5.11  Limitations on Guarantees..............................
     Section 5.12  SEC Reports............................................
     Section 5.13  Corporate Existence....................................
     Section 5.14  Stay, Extension and Usury Laws.........................
     Section 5.15  Insurance; Books and Records;
                     Compliance with Law..................................
     Section 5.16  Inspection and Confidentiality.........................
     Section 5.17  Compliance Certificate.................................

ARTICLE 6   SUCCESSORS
     Section 6.01  Limitations on Mergers and
                     Consolidations.......................................
     Section 6.02  Successor Corporation Substituted......................

ARTICLE 7   DEFAULTS AND REMEDIES
     Section 7.01  Events of Default......................................
     Section 7.02  Acceleration...........................................
     Section 7.03  Other Remedies.........................................
     Section 7.04  Waiver of Past Defaults................................
     Section 7.05  Control by Majority....................................
     Section 7.06  Limitations on Suits...................................
     Section 7.07  Rights of Holders to Receive Payment...................
     Section 7.08  Collection Suit by Trustee.............................
     Section 7.09  Trustee May File Proofs of Claim.......................
     Section 7.10  Priorities.............................................
     Section 7.11  Undertaking for Costs..................................
     Section 7.12  Restoration of Rights and Remedies.....................

 
ARTICLE 8   TRUSTEE
     Section 8.01  Duties of Trustee......................................
     Section 8.02  Rights of Trustee......................................
     Section 8.03  Individual Rights of Trustee...........................
     Section 8.04  Trustee's Disclaimer...................................
     Section 8.05  Notice of Defaults.....................................
     Section 8.06  Compensation and Indemnity.............................
     Section 8.07  Replacement of Trustee.................................
     Section 8.08  Successor Trustee by Merger, etc.......................
     Section 8.09  Eligibility; Disqualification..........................
     Section 8.10  Reports by Trustee to Holders..........................

ARTICLE 9   DISCHARGE OF INDENTURE
     Section 9.01  Termination of Company's Obligations...................
     Section 9.02  Application of Trust Money.............................
     Section 9.03  Repayment to Company...................................
     Section 9.04  Reinstatement..........................................

ARTICLE 10  AMENDMENTS
     Section 10.01  Without Consent of Holders............................
     Section 10.02  With Consent of Holders...............................
     Section 10.03  Compliance with Trust Indenture Act...................
     Section 10.04  Revocation and Effect of Consents.....................
     Section 10.05  Notation on or Exchange of Notes......................
     Section 10.06  Trustee to Sign Amendments, etc.......................

ARTICLE 11  MISCELLANEOUS
     Section 11.01  Trust Indenture Act Controls..........................
     Section 11.02  Notices...............................................
     Section 11.03  Certificate and Opinion as to Conditions
                      Precedent...........................................
     Section 11.04  Statements Required in Certificate or
                      Opinion.............................................
     Section 11.05  Rules by Trustee and Agents...........................
     Section 11.06  Legal Holidays........................................
     Section 11.07  No Recourse Against Others............................
     Section 11.08  Governing Law.........................................
     Section 11.09  No Adverse Interpretation of Other
                      Agreements..........................................
     Section 11.10  Successors............................................
     Section 11.11  Severability..........................................
     Section 11.12  Counterpart Originals.................................
     Section 11.13  Trustee as Paying Agent and Registrar.................
     Section 11.14  Table of Contents, Headings, etc......................

SIGNATURES................................................................

EXHIBIT A FORM OF SERIES A NOTE
EXHIBIT B FORM OF SERIES B NOTE
EXHIBIT C FORM OF LEGEND FOR GLOBAL NOTE
EXHIBIT D TRANSFER CERTIFICATE
EXHIBIT E TRANSFEREE CERTIFICATE FOR INSTITUTIONAL ACCREDITED INVESTORS
EXHIBIT F FORM OF TRANSFEREE CERTIFICATE FOR REGULATION S TRANSFERS
EXHIBIT G FORM OF GUARANTEE

 
EXHIBIT H GUARANTEE OF CYGNA CONSULTING ENGINEERS AND PROJECT MANAGEMENT, INC.
EXHIBIT I GUARANTEE OF ICF KAISER GOVERNMENT PROGRAMS, INC.
EXHIBIT J GUARANTEE OF PCI OPERATING COMPANY, INC.
EXHIBIT K GUARANTEE OF SYSTEMS APPLICATIONS INTERNATIONAL, INC.

 
                            CROSS-REFERENCE TABLE*
 
 
Trust Indenture                           Indenture Section
  Act Section                             -----------------
- ---------------     
                                                                          

310(a)(1)...................................................................8.09
   (a)(2)...................................................................8.09
   (a)(3)...................................................................N.A.
   (a)(4)...................................................................N.A.
   (a)(5).....................................................................**
   (b)........................................................................**
   (c)......................................................................N.A.
311(a)........................................................................**
   (b)........................................................................**
   (c)......................................................................N.A.
312(a)........................................................................**
   (b)........................................................................**
   (c)........................................................................**
313(a)......................................................................8.10
   (b)(1)...................................................................8.10
   (b)(2)...................................................................8.10
   (c)......................................................................8.10
   (d)......................................................................8.10
314(a)(1)...................................................................5.12
   (a)(2).....................................................................**
   (a)(3).....................................................................**
   (a)(4)...................................................................5.17
   (b)......................................................................N.A.
   (c)(1)..................................................................11.03
   (c)(2)..................................................................11.03
   (c)(3)...................................................................N.A.
   (d)......................................................................N.A.
   (e).....................................................................11.04
   (f)......................................................................N.A.
315(a)...................................................................8.01(2)
   (b)................................................................8.05,11.02
   (c)...................................................................8.01(1)
   (d)...................................................................8.01(3)
   (e)......................................................................7.11
316(a)(last sentence).......................................................2.08
   (a)(1)(A)................................................................7.05
   (a)(1)(B)................................................................7.04
   (a)(2)...................................................................N.A.
   (b)......................................................................7.07
   (c).....................................................................10.04
317(a)(1)...................................................................7.08
   (a)(2)...................................................................7.09
   (b)......................................................................2.04
318(a).....................................................................11.01


N.A.   means not applicable.
*   This Cross-Reference Table is not part of the Indenture.
**  Included pursuant to Section 318(c) of the Trust Indenture Act of 1939.

 
          INDENTURE dated as of December 23, 1996, between ICF Kaiser
International, Inc., a Delaware corporation as issuer (the "Company"), and The
Bank of New York, a New York banking corporation (the "Trustee").

          The Company has duly authorized the creation of an issue of 12% Senior
Notes due 2003, Series A, and 12% Senior Notes due 2003, Series B (together with
the Series A Notes, the "Notes"), to be issued in exchange for the 12% Senior
Notes due 2003, Series A, pursuant to the Registration Rights Agreement and, to
provide therefor, the Company has duly authorized the execution and delivery of
this Indenture.  All things necessary to make the Notes, when duly issued and
executed by the Company and authenticated and delivered hereunder, and the
Guarantees of Cygna Consulting Engineers and Project Management, Inc., a
California corporation, ICF Kaiser Government Programs, Inc., a Delaware
corporation, PCI Operating Company, Inc., a Delaware corporation, and Systems
Applications International, Inc., a Delaware corporation, as guarantors of the
principal of, premium, if any, and interest on the Notes (each individually, a
"Guarantor" and collectively, the "Guarantors"), the valid and binding
obligations of the Company and the Guarantors, respectively, and to make this
Indenture a valid and binding agreement of the Company, and the Guarantees valid
and binding obligations of each of the Guarantors, have been done.

          Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the Holders of the Notes:
    
                                   ARTICLE 1
                         DEFINITIONS AND INCORPORATION
                                 BY REFERENCE

Section 1.01    Definitions

          "Acquired Indebtedness" means:  (i) with respect to any Person that
becomes a direct or indirect Subsidiary of the Company after the date of this
Indenture, Indebtedness of such Person and its Subsidiaries existing at the time
such Person becomes a Subsidiary of the Company that was not incurred in
connection with, or in contemplation of, such Person becoming a Subsidiary of
the Company; and (ii) with respect to the Company or any of its Subsidiaries,
any Indebtedness assumed by the Company or any of its Subsidiaries in connection
with the acquisition of an asset from another Person that was not incurred by
such other Person in connection with, or in contemplation of, such acquisition.

          "Affiliate" of any Person means any Person (i) which directly or
indirectly controls or is controlled by, or is under direct or indirect common
control with, the referent Person, (ii) which beneficially owns or holds 10% or
more of any class of the Voting Stock of the referent Person or (iii) of which
10% or more of the Voting Stock (or, in the case of a Person which is not a
corporation, 10% or more of the equity interest) is beneficially owned or held
by the referent Person.  For purposes of this definition, control of a Person
shall mean 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.  Notwithstanding the foregoing, the term "Affiliate"
shall not include, with respect to the Company or any Wholly Owned Subsidiary of
the Company, (a) any Wholly Owned Subsidiary of the Company or (b) any
Subsidiary of the Company that is not a Wholly Owned Subsidiary or any Joint
Venture, provided that such Subsidiary or Joint Venture is not under the control
of, and does not have any Capital Stock (other than directors' qualifying
shares) or Indebtedness owned or held by, any Affiliate of the Company.

          "Agent" means any Registrar or Paying Agent.

          "Asset Sale" for any Person means the sale, lease, transfer or other
disposition or series of sales, leases, transfers or other dispositions
(including without limitation by merger or consolidation, and whether by
operation of law or otherwise) of any of that Person's assets (including without
limitation the sale or other disposition of Capital Stock of any Subsidiary of
such Person, whether by such Person or by such Subsidiary), whether owned on the
date of this Indenture or subsequently acquired, excluding, however:  (i) any
sale, lease, transfer or other disposition between the Company and any of its
Wholly Owned Restricted Subsidiaries; (ii) any transfer of assets of the Company
or any of its Restricted Subsidiaries that constitutes and is treated as a
Designated Investment; (iii) any transfer of assets of the Company or any of its
Restricted Subsidiaries that constitutes a Change of Control and that is
governed by and effected in accordance with the provisions of Section 5.03 and
Article 6; and (iv) any sale, lease, transfer or other disposition, or 

 
series of sales, leases, transfers or other dispositions, of assets having a
purchase price or transaction value, as the case may be, of $1,000,000 or less,
provided that no Default or Event of Default exists at the time of such sale.

          "Asset Sale Offer" means an Asset Sale Offer as defined in 
Section 5.09.

          "Attributable Indebtedness," when used with respect to any Sale and
Leaseback Transaction, means, as at the time of determination, the greater of
(i) the fair market value of the property subject to such Sale and Leaseback
Transaction and (ii) the present value (discounted at a rate equivalent to the
Company's then-current weighted average cost of funds for borrowed money as at
the time of determination, compounded on a semi-annual basis) of the total
obligations of the lessee for rental payments during the remaining term of the
lease included in any such Sale and Leaseback Transaction.

          "Bank Credit Agreement" means the Credit Agreement dated May 6, 1996
among the Company, certain banks and CoreStates Bank, N.A., as agent for the
banks, as such agreement has been and may be amended, restated, supplemented or
otherwise modified from time to time, and includes any successor bank credit
agreement.

          "Bankruptcy Law" means Title 11, U.S. Code or any similar Federal,
state or foreign law for the relief of debtors.

          "Board of Directors" for any Person means the Board of Directors of
such Person or any authorized committee of the Board of Directors of such
Person.

          "Board Resolution" for any Person means a duly adopted resolution of
the Board of Directors of such Person.

          "Business Day" means any day other than a Legal Holiday.

          "Capital Stock" of any Person means any and all shares, rights to
purchase, warrants or options (whether or not currently exercisable),
participations or other equivalents of or interests in (however designated) the
equity (including without limitation common stock, preferred stock and
partnership and joint venture interests) of such Person.

          "Capitalized Lease Obligations" of any Person means the obligations of
such Person to pay rent or other amounts under a lease that is required to be
capitalized for financial reporting purposes in accordance with GAAP, and the
amount of such obligation shall be the capitalized amount thereof determined in
accordance with GAAP.

          "Cash Equivalents" means: (i) obligations issued or unconditionally
guaranteed by the United States of America or any agency thereof or obligations
issued by any agency or instrumentality thereof and backed by the full faith and
credit of the United States of America; (ii) commercial paper rated the highest
grade by Moody's Investors Service, Inc. and Standard & Poor's Corporation and
maturing not more than one year from the date of creation thereof; and 
(iii) readily marketable direct obligations issued by any state of the United
States of America or any political subdivision thereof having one of the two
highest rating categories obtainable from either Moody's Investors Service, Inc.
or Standard & Poor's Corporation.

          "Change of Control" means any of the following:  (i) the sale, lease,
conveyance or other disposition of all or substantially all of the Company's
assets as an entirety or substantially as an entirety to any Person or "group"
(within the meaning of Section 13(d)(3) of the Exchange Act) in one or a series
of transactions, provided that a transaction where the holders of all classes of
Common Equity of the Company immediately prior to such transaction own, directly
or indirectly, more than 50% of the aggregate voting power of all classes of
Common Equity of such Person or group immediately after such transactions shall
not be a Change of Control; (ii) the acquisition by the Company and any of its
Subsidiaries of 50% or more of all classes of Common Equity of the Company in
one transaction or a series of related transactions; (iii) the approval by the
Company of a Plan of Liquidation of the Company; (iv) any transaction or series
of transactions (as a result of a tender offer, merger, consolidation or
otherwise) that results in, or that is in connection with, (a) any Person,
including a "group" (within the meaning of Section 13(d)(3) of the Exchange Act)
that includes such Person, acquiring "beneficial ownership" (as defined in Rule
13d-3 under the Exchange Act), directly or indirectly, of 50% or more of the
aggregate voting power of all classes of Common Equity of the Company or any

 
Person that possesses "beneficial ownership" (as defined in Rule 13d-3 under the
Exchange Act), directly or indirectly, of 50% or more of the aggregate voting
power of all classes of Common Equity of the Company, or (b) less than 50%
(measured by the aggregate voting power of all classes) of the Company's Common
Equity being registered under Section 12(b) or 12(g) of the Exchange Act; or 
(v) a majority of the Board of Directors of the Company not being comprised of
Continuing Directors.

          "Common Equity" of any Person means all Capital Stock of such Person
that is generally entitled to (i) vote in the election of directors of such
Person or (ii) if such Person is not a corporation, vote or otherwise
participate in the selection of the governing body, partners, managers or others
that will control the management and policies of such Person.

          "Company" means (i) ICF Kaiser International, Inc., a Delaware
corporation, and (ii) subject to the provisions of Article 6, in replacement of
or in addition to ICF Kaiser International, Inc., as the case may be, any
successor of ICF Kaiser International, Inc.

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

          "Consolidated Amortization Expense" of any Person for any period means
the amortization expense of such Person and its Restricted Subsidiaries for such
period (to the extent included in the computation of Consolidated Net Income of
such Person), determined on a consolidated basis in accordance with GAAP.

          "Consolidated Depreciation Expense" of any Person for any period means
the depreciation expense of such Person and its Restricted Subsidiaries for such
period (to the extent included in the computation of Consolidated Net Income of
such Person), determined on a consolidated basis in accordance with GAAP.

          "Consolidated Fixed Charge Coverage Ratio" of any Person means, with
respect to any determination date, the ratio of (i) EBITDA for such Person's
prior four full fiscal quarters for which financial results have been reported
immediately preceding the determination date to (ii) the aggregate Fixed Charges
of such Person for such four fiscal quarters; provided, however, that if any
calculation of the Company's Consolidated Fixed Charge Coverage Ratio requires
the use of any quarter beginning prior to the date of this Indenture, such
calculation shall be made on a pro forma basis, giving effect to the issuance of
the Notes and the use of the net proceeds therefrom as if the same had occurred
at the beginning of the four-quarter period used to make such calculation; and
provided, further, that if any such calculation requires the use of any quarter
prior to the date that any Asset Sale was consummated, or that any Indebtedness
was incurred, or that any acquisition was effected, by the Company or any of its
Restricted Subsidiaries, such calculation shall be made on a pro forma basis,
giving effect to each such Asset Sale, incurrence of Indebtedness or
acquisition, as the case may be, and the use of any proceeds therefrom, as if
the same had occurred at the beginning of the four-quarter period used to make
such calculation.

          "Consolidated Income Tax Expense" means, for any Person for any
period, the provision for taxes based on income and profits of such Person and
its Restricted Subsidiaries to the extent such income or profits were included
in computing Consolidated Net Income of such Person for such period.

          "Consolidated Net Income" of any Person for any period means the net
income (or loss) of such Person and its Restricted Subsidiaries for such period
determined on a consolidated basis in accordance with GAAP; provided that there
shall be excluded from such net income (to the extent otherwise included
therein), without duplication:  (i) the net income (or loss) of any Person
(other than a Restricted Subsidiary of the referent Person) in which any Person
other than the referent Person has an ownership interest, except to the extent
that any such income has actually been received by the referent Person or any of
its Wholly Owned Restricted Subsidiaries in the form of cash dividends or
similar cash distributions during such period; (ii) except to the extent
includible in the consolidated net income of the referent Person pursuant to the
foregoing clause (i), the net income (or loss) of any Person that accrued prior
to the date that (a) such Person becomes a Restricted Subsidiary of the referent
Person or is merged into or consolidated with the referent Person or any of 

 
its Restricted Subsidiaries or (b) the assets of such Person are acquired by the
referent Person or any of its Restricted Subsidiaries; (iii) the net income (or
loss) of any Restricted Subsidiary of the referent Person to the extent that the
declaration or payment of dividends or similar distributions by such Restricted
Subsidiary of that income is not permitted by operation of the terms of its
charter or any agreement, instrument, judgment, decree, order, statute, rule or
governmental regulation applicable to that Restricted Subsidiary during such
period (provided that the amount of loss excluded pursuant to this clause 
(iii) shall not exceed that amount of net income excluded pursuant to this
clause (iii)); (iv) any gain (but not loss, except pursuant to clause (vii)
below), together with any related provisions for taxes on any such gain,
realized during such period by the referent Person or any of its Restricted
Subsidiaries upon (a) the acquisition of any securities, or the extinguishment
of any Indebtedness, of the referent Person or any of its Restricted
Subsidiaries or (b) any Asset Sale by the referent Person or any of its
Restricted Subsidiaries; (v) any extraordinary gain (but not extraordinary loss,
except pursuant to clause (vii) below), together with any related provision for
taxes on any such extraordinary gain, realized by the referent Person or any of
its Restricted Subsidiaries during such period; (vi) in the case of a successor
to such Person by consolidation, merger or transfer of its assets, any earnings
of the successor prior to such merger, consolidation or transfer of assets; and
(vii) in the case of the Company, any extraordinary loss directly related to the
repurchase or repayment, substantially concurrently with the sale of the Notes,
of (a) the Company's 13.5% Senior Subordinated Notes due 1999 and warrants
issued in connection with the issuance of such notes, (b) the Bank Credit
Agreement and (c) the Company's Series 2C Senior Preferred Stock and related
Series 2C Warrants.

          "Consolidated Net Tangible Assets" of any Person as of any date means
the Consolidated Tangible Assets of such Person and its Restricted Subsidiaries
less the total current liabilities of such Person and its Restricted
Subsidiaries, on a consolidated basis as of such date.

          "Consolidated Tangible Assets" of any Person as of any date means the
total assets of such Person and its Restricted Subsidiaries (excluding any
assets that would be classified as "intangible assets" under GAAP) on a
consolidated basis at such date, determined in accordance with GAAP, less all
write-ups subsequent to September 30, 1996 in the book value of any asset owned
by such Person or any of its Restricted Subsidiaries.

          "Consolidated Tangible Net Worth" of any Person as of any date means
the stockholders' equity (including any preferred stock that is classified as
equity under GAAP, other than Disqualified Stock) of such Person and its
Restricted Subsidiaries (excluding any equity adjustment for foreign currency
translation for any period subsequent to September 30, 1996 and any assets that
would be classified as "intangible assets" under GAAP) on a consolidated basis
at such date, as determined in accordance with GAAP, less all write-ups
subsequent to September 30, 1996 in the book value of any asset owned by such
Person or any of its Restricted Subsidiaries.

          "Continuing Director" of the Company as of any date means a member of
the Board of Directors of the Company who (i) was a member of the Board of
Directors of the Company on the date of this Indenture or (ii) was nominated for
election or elected to the Board of Directors of the Company with the
affirmative vote of at least a majority of the directors who were Continuing
Directors at the time of such nomination or election.

          "Corporate Trust Office of the Trustee" means the address of the
Trustee specified in Section 11.02 or such other address as the Trustee may give
notice to the Company.

          "Custodian" means any receiver, trustee, assignee, liquidator,
sequestrator or similar official under any Bankruptcy Law.

          "Default" means any event, act or condition that is, or after notice
or the passage of time or both would be, an Event of Default.

          "Depository" means, with respect to the Notes issued in the form of
one or more Global Notes, The Depository Trust Company or another Person
designated as Depository by the Company, which must be a clearing agency
registered under the Exchange Act.

 
          "Designated Investments" means Investments made after the date of this
Indenture in (i) any Subsidiary of the Company that is not a Wholly Owned
Restricted Subsidiary or (ii) any Joint Venture, provided that such Subsidiary
or Joint Venture is engaged in one or more Permitted Businesses.

          "Disqualified Stock" means any Capital Stock that, by its terms, by
the terms of any agreement related thereto or by the terms of any security into
which it is convertible, puttable or exchangeable, is, or upon the happening of
any event or the passage of time would be, required to be redeemed or
repurchased by the issuer thereof or any of its Subsidiaries, whether or not at
the option of the holder thereof, or matures or is mandatorily redeemable,
pursuant to a sinking fund obligation or otherwise, in whole or in part, on or
prior to the final maturity date of the Notes.

          "EBITDA" means, with respect to any Person for any period, without
duplication, the sum of the amounts for such period of (i) Consolidated Net
Income, (ii) Consolidated Income Tax Expense, (iii) Consolidated Amortization
Expense (but only to the extent not included in Fixed Charges), (iv) 
Consolidated Depreciation Expense, (v) Fixed Charges and (vi) all other non-
cash items reducing the Consolidated Net Income of such Person and its
Restricted Subsidiaries, in each case determined on a consolidated basis in
accordance with GAAP (provided, however, that the amounts set forth in clauses
(ii) through (vi) shall be included only to the extent such amounts reduce
Consolidated Net Income), less the aggregate amount of all non-cash items,
determined on a consolidated basis, to the extent such items increase
Consolidated Net Income.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "Existing Indebtedness" means all of the Indebtedness of the Company
and its Restricted Subsidiaries that is outstanding on the date of this
Indenture.

          "Existing Indenture" means the Indenture for the Existing Notes dated
January 11, 1994 between the Company and The Bank of New York as Trustee, as
such Indenture has been and may be amended, restated, supplemented or otherwise
modified from time to time.

          "Existing Notes" means the $125,000,000 principal amount of 12% Senior
Subordinated Notes due 2003 issued pursuant to the Existing Indenture.

          "Fixed Charges" means, with respect to any Person for any period, the
aggregate amount of (i) interest, whether expensed or capitalized, paid, accrued
or scheduled to be paid or accrued during such period (except to the extent
accrued in a prior period) in respect of all Indebtedness of such Person and its
Restricted Subsidiaries (including (a) original issue discount on any
Indebtedness and (b) the interest portion of all deferred payment obligations,
calculated in accordance with the effective interest method, in each case to the
extent attributable to such period) and (ii) dividend requirements on preferred
stock of such Person and its Subsidiaries (whether in cash or otherwise), but
not including dividends payable solely in shares of Qualified Capital Stock,
paid, accrued or scheduled to be paid or accrued during such period (except to
the extent accrued in a prior period), and excluding items eliminated in
consolidation.  For purposes of this definition, (1) interest on a Capitalized
Lease Obligation shall be deemed to accrue at the rate of interest implicit in
such Capitalized Lease Obligation in accordance with GAAP, (2) interest on
Indebtedness that is determined on a fluctuating basis shall be deemed to have
accrued at a fixed rate per annum equal to the rate of interest of such
Indebtedness in effect on the last day of the period with respect to which Fixed
Charges are being calculated, (3) interest on Indebtedness that may optionally
be determined at an interest rate based upon a factor of a prime or similar
rate, a eurocurrency interbank offered rate or other rates, shall be deemed to
have been based upon the rate actually chosen, or, if none, then based upon such
optional rate chosen as such Person may designate and (4) Fixed Charges shall be
increased or reduced by the net cost (including without limitation amortization
of discount) or benefit associated with Hedging Obligations attributable to such
period.  For purposes of clause (ii) above, dividend requirements (other than
dividends payable solely in shares of Qualified Capital Stock) shall be
increased to an amount representing the pretax earnings that would be required
to cover such dividend requirements; accordingly, the increased amount shall be
equal to a fraction, the numerator of which is such dividend requirements and
the denominator of which is 1 minus the applicable actual combined Federal,
state, local and foreign income tax rate of such Person and its Subsidiaries
(expressed as a decimal), on a consolidated basis, for the fiscal year
immediately preceding the date of the transaction giving rise to the need to
calculate Fixed Charges.

 
          "Foreign Asset Sale" means any Asset Sale in respect of the Capital
Stock or assets of a Foreign Subsidiary.

          "Foreign Subsidiary" means any Subsidiary of the Company that is
organized under the laws of any jurisdiction other than the United States of
America, any state thereof or the District of Columbia.

          "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession of the United States, as in effect on January 11, 1994.

          "Global Note" means a security evidencing all or a portion of the
Notes issued to the Depository or its nominee in accordance with Section 2.01
and bearing the legend set forth in Exhibit C.

          "Guarantee" shall mean any guarantee substantially in the form of
Exhibit G to this Indenture executed and delivered by any Restricted Subsidiary
pursuant to the provisions of Section 5.11 of the Indenture.

          "Guarantor" shall mean (i) Cygna Consulting Engineers and Project
Management, Inc., ICF Kaiser Government Programs, Inc., PCI Operating Company,
Inc., Systems Applications International, Inc., and (ii) each of the Company's
Subsidiaries that in the future executes a Guarantee.

          "Hedging Obligations" of any Person means the obligations of such
Person pursuant to any interest rate swap agreement, foreign currency exchange
agreement, interest rate collar agreement, option or futures contract or other
similar agreement or arrangement relating to interest rates or foreign exchange
rates.

          "Holder" means a Person holding a Note.

          "Indebtedness" of any Person at any date means, without duplication:
(i) all liabilities, contingent or otherwise, of such Person for borrowed money
(whether or not the recourse of the lender is to the whole of the assets of such
Person or only to a portion thereof); (ii) all obligations of such Person
evidenced by bonds, debentures, notes or other similar instruments; (iii) all
obligations of such Person in respect of letters of credit or other similar
instruments (or reimbursement obligations with respect thereto), other than
standby letters of credit issued for the benefit of, or surety or performance
bonds issued by, such Person in the ordinary course of business to the extent
such letters of credit are not drawn upon; (iv) all obligations of such Person
with respect to Hedging Obligations; (v) all obligations of such Person to pay
the deferred and unpaid purchase price of property or services, except trade
payables and accrued expenses incurred by such Person in the ordinary course of
business in connection with obtaining goods, materials or services, which
payable is not overdue according to industry practice or the original terms of
sale unless such payable is being-contested in good faith; (vi) the maximum
fixed repurchase price of all Disqualified Stock of such Person; (vii) all
Capitalized Lease Obligations of such Person; (viii) all Indebtedness of others
secured by a Lien on any asset of such Person, whether or not such Indebtedness
is assumed by such Person, other than a pledge by a Single Purpose Subsidiary of
the Capital Stock of an Unrestricted Subsidiary or Joint Venture of such Single
Purpose Subsidiary to secure Indebtedness of such Unrestricted Subsidiary or
Joint Venture incurred to finance a project constituting one or more Permitted
Businesses; (ix) all Indebtedness of others guaranteed by, or otherwise the
Liability of, such Person to the extent of such guarantee or Liability; and 
(x) all Attributable Indebtedness. The amount of Indebtedness of any Person at
any date shall be the outstanding balance at such date of all unconditional
obligations as described above, the maximum liability of such Person for any
such contingent obligations at such date and, in the case of clause (viii), the
fair market value of any asset subject to a Lien securing the Indebtedness of
others on the date that the Lien attaches. For purposes of the first sentence
hereof, the "maximum fixed repurchase price" of any Disqualified Stock that does
not have a fixed repurchase price shall be calculated in accordance with the
terms of such Disqualified Stock as if such Disqualified Stock were purchased on
any date on which Indebtedness shall be required to be determined pursuant to
this Indenture, and if such price is based upon, or measured by, the fair market
value of such Disqualified Stock (or any equity security for which it may be
exchanged or converted), such fair market value shall be determined in good
faith by the Board of Directors of such Person, which determination shall be
evidenced by a Board Resolution.

 
          "Indenture" means this Indenture as amended, supplemented or modified
from time to time.

          "Independent Financial Advisor" means an accounting, appraisal or
investment banking firm of nationally recognized standing that is, in the
reasonable judgment of the Company's Board of Directors, qualified to perform
the task for which it has been engaged and disinterested and independent with
respect to the Company and its Affiliates.

          "Initial Purchaser" means BT Securities Corporatio n.

          "Institutional Accredited Investor" means an institution that is an
"accredited investor" as that term is defined in Rule 501(a)(1), (2), (3) or (7)
under the Securities Act.

          "Interest Payment Date" has the meaning assigned to such term in the
Notes.

          "Investments" of any Person means (i) all investments by such Person
in any other Person in the form of loans, advances or capital contributions or
similar credit extensions constituting Indebtedness of such Person, and any
guarantee of Indebtedness of any other Person, (ii) all purchases (or other
acquisitions for consideration) by such Person of Indebtedness, Capital Stock or
other securities of any other Person and (iii) all other items that would be
classified as investments (including without limitation purchases of assets
outside the ordinary course of business) on a balance sheet of such Person
prepared in accordance with GAAP; provided, however, that advances to non-
executive employees and extensions of trade credit and advances to customers and
suppliers and other contractual and trade relationships, requiring repayment
within reasonable commercial periods, to the extent made in the ordinary course
of business consistent with past practice and in accordance with normal industry
practice, shall not be deemed to constitute Investments.

          "Joint Venture" means (i) a corporation of which less than a majority
of the aggregate voting power of all classes of the Common Equity is owned by
the Company or its Restricted Subsidiaries and (ii) any entity other than a
corporation in which the Company and its Restricted Subsidiaries own less than a
majority of the Common Equity of such entity.

          "Junior Subordinated Indebtedness" of the Company at any date means
Indebtedness of the Company which by its terms, or by the terms of any agreement
or instrument pursuant to which such Indebtedness is issued, (i) is expressly
subordinated in right of payment to the Notes and (ii) provides that no payment
of principal of such Indebtedness by way of sinking fund, mandatory redemption,
defeasance or otherwise is required to be made by the Company (including without
limitation at the option of the holder thereof) at any time prior to the
maturity of the Notes.

          "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or other similar encumbrance of any kind in respect of
such asset, whether or not filed, recorded or otherwise perfected under
applicable law (including without limitation any conditional sale or other title
retention agreement, and any lease in the nature thereof, any option or other
agreement to sell, and any filing of, or agreement to give, any financing
statement under the Uniform Commercial Code (or equivalent statutes) of any
jurisdiction).

          "Net Proceeds" with respect to any Asset Sale by any Person means the
aggregate net proceeds received by such Person from such Asset Sale (including
without limitation the amount of cash applied to repay Indebtedness secured by
any asset involved in such Asset Sale or otherwise received as consideration for
the assumption or incurrence of liabilities incurred in connection with or in
anticipation of such Asset Sale) after (i) provision for all income or other
taxes measured by or resulting from such Asset Sale or the transfer of the
proceeds of such Asset Sale to such Person and (ii) payment of all brokerage
commissions and the underwriting and other fees and expenses related to such
Asset Sale, whether such proceeds are in cash or property (valued at the fair
market value thereof at the time of receipt as determined in good faith by the
Board of Directors of such Person, which determination shall be evidenced by a
Board Resolution).

 
          "Net Reductions in Investments" means the amount of cash and Cash
Equivalents, less all fees and expenses incurred or accrued in connection with
the realization or collection of such cash and Cash Equivalents, and after
giving effect to all taxes payable with respect thereto, received with respect
to any Designated Investment, whether from the payment of interest on
Indebtedness, dividends, repayments of loans or advances or other transfers of
assets from the Person in which such Designated Investment was made, but only to
the extent that such cash or Cash Equivalents have been paid to the Company or
one or more Wholly Owned Restricted Subsidiaries of the Company in compliance
with all applicable laws, rules and regulations and all relevant documents,
agreements and instruments.

          "Non-Recourse Indebtedness" of a Single Purpose Subsidiary means
Indebtedness for which (i) the sole legal recourse for collection of principal,
premium, if any, and interest on such Indebtedness is against (a) the specific
property identified in the instruments evidencing or securing such Indebtedness
and such property was acquired with the proceeds of such Indebtedness or such
Indebtedness was incurred within 90 days of the acquisition of such property or
(b) the Capital Stock of such Single Purpose Subsidiary, provided that such
Single Purpose Subsidiary has no assets other than the specific property
acquired with the proceeds of such Indebtedness plus a reasonable amount of
working capital, (ii) no assets of such Single Purpose Subsidiary, other than
those assets identified in clause (i)(a) of this definition, may be realized
upon in collection of principal, premium, if any, or interest on such
Indebtedness and (iii) neither the Company nor any Restricted Subsidiary of the
Company, other than the referent Single Purpose Subsidiary, is directly or
indirectly liable to make any payment thereon, has made any guarantee of payment
or performance of such Indebtedness or has pledged or granted any lien or
encumbrances on any assets as collateral or security with respect thereto, other
than the Capital Stock of the referent Single Purpose Subsidiary.

          "Notes" means the Notes issued under this Indenture.

          "Officer" means the Chief Executive Officer, Chief Operating Officer,
Chief Financial Officer, the Treasurer, any Assistant Treasurer, Controller,
Secretary or any Vice President of the Company or a Guarantor, or any other
authorized representative designated by the Board of Directors of the Company or
a Guarantor.

          "Officers' Certificate" means a certificate signed by two Officers,
one of whom must be the Company's Chief Executive Officer, Chief Financial
Officer or Controller.

          "Opinion of Counsel" means a written opinion from legal counsel who is
acceptable to the Trustee.  The counsel may be an employee of or counsel to the
Company or the Trustee.

          "Paying Agent" means the paying agent as defined in Section 2.03.

          "Payment Restriction", with respect to a Subsidiary of any Person,
means any encumbrance, restriction or limitation, whether by operation of the
terms of its charter or by reason of any agreement, instrument, judgment,
decree, order, statute, rule or governmental regulation, on the ability of 
(i) such Subsidiary to (a) pay dividends or make other distributions on its
Capital Stock or make payments on any obligation, liability or Indebtedness owed
to such Person or any other Subsidiary of such Person, (b) make loans or
advances to such Person or any other Subsidiary of such Person or (c) transfer
any of its properties or assets to such Person or any other Subsidiary of such
Person or (ii) such Person or any other Subsidiary of such Person to receive or
retain any such (a) dividends, distributions or payments, (b) loans or advances
or (c) transfer of properties or assets.

          "Permitted Businesses" means the businesses of providing consulting,
engineering or construction services to public and private sector clients in the
environment, energy, infrastructure and industry markets.

          "Permitted Investments" means:  (i) direct obligations of the United
States of America or any agency thereof, or obligations guaranteed by the United
States of America or any agency thereof, in each case maturing within 180 days
of the date of acquisition thereof; (ii) certificates of deposit or Eurodollar
deposits, due within 180 days of the date of acquisition thereof, with a
commercial bank which is organized under the laws of the United States of
America or any state thereof having capital funds of at least $500,000,000 or
more; and (iii) commercial paper given the highest rating by two established
national credit rating agencies and maturing not more than 180 days from the
date of acquisition thereof.

 
          "Person" means any individual, corporation, partnership, joint
venture, incorporated or unincorporated association, joint-stock company, trust,
unincorporated organization or government or other agency or political
subdivision thereof or other entity of any kind.

          "Physical Notes" shall have the meaning given such term in 
Section 2.01.

          "Plan of Liquidation," with respect to any Person, means a plan that
provides for, contemplates or the effectuation of which is preceded or
accompanied by (whether or not substantially contemporaneously, in phases or
otherwise):  (i) the sale, lease, conveyance or other disposition of all or
substantially all of the assets of such Person otherwise than as an entirety or
substantially as an entirety; and (ii) the distribution of all or substantially
all of the proceeds of such sale, lease, conveyance or other disposition and all
or substantially all of the remaining assets of such Person to Holders of
Capital Stock of such Person.

          "Private Placement Legend" means the legend initially set forth on the
Series A Notes in the form set forth on Exhibit A.

          "Qualified Capital Stock" means Capital Stock that is not Disqualified
Stock.

          "Qualified Institutional Buyer" or "QIB" means a "qualified
institutional buyer" as such term is defined in Rule 144A under the Securities
Act.

          "Refinancing Indebtedness" means Indebtedness of the Company or a
Restricted Subsidiary of the Company issued in exchange for, or the proceeds
from the issuance and sale or disbursement of which are used substantially
concurrently to repay, redeem, refund, refinance, discharge or otherwise retire
for value, in whole or in part (collectively, "repay"), or constituting an
amendment, modification or supplement to or a deferral or renewal of
(collectively, an "amendment"), any Indebtedness of the Company or any of its
Restricted Subsidiaries existing immediately after the original issuance of the
Notes or incurred pursuant to the provisions of Section 5.04 in a principal
amount not in excess of the principal amount of the Indebtedness so refinanced;
provided that: (i) the Refinancing Indebtedness is the obligation of the same
Person, and is subordinated to the Notes, if at all, to the same extent, as the
Indebtedness being repaid; (ii) the Refinancing Indebtedness is scheduled to
mature either (a) no earlier than the Indebtedness being repaid or (b) after the
maturity date of the Notes; and (iii) the portion, if any, of the Refinancing
Indebtedness that is scheduled to mature on or prior to the maturity date of the
Notes has a Weighted Average Life to Maturity at the time such Refinancing
Indebtedness is incurred that is equal to or greater than the Weighted Average
Life to Maturity of the portion of the Indebtedness being repaid that is
scheduled to mature on or prior to the maturity date of the Notes.

          "Registrar" means the Registrar as defined in Section 2.03.

          "Registration Rights Agreement" means the Registration Rights
Agreement dated December 23, 1996 between the Company and the Initial Purchaser.

          "Regulation S " means Regulation S under the Securities Act.

          "Related Business Investment" means any Investment directly by the
Company or one or more of its Wholly Owned Restricted Subsidiaries in any
business that is closely related to or complements the business of the Company
and its Subsidiaries as such business exists on the date thereof.

          "Representative" means the indenture trustee or other trustee, agent
or representative for an issue of Senior Indebtedness.

          "Restricted Debt Payment" means any purchase, redemption, defeasance
(including without limitation in substance or legal defeasance) or other
acquisition or retirement for value, directly or indirectly, by the Company or a
Subsidiary of the Company, prior to the scheduled maturity or prior to any
scheduled repayment of principal or sinking 

 
fund payment, as the case may be, in respect of Indebtedness of the Company that
is subordinate in right of payment to the Notes other than a Restricted Debt
Payment made with the proceeds of a substantially concurrent sale (other than to
a Subsidiary of the Company or an employee stock ownership plan) of the
Company's Qualified Capital Stock, provided that all Indebtedness so purchased,
redeemed, defeased or otherwise acquired or retired for value promptly is
surrendered for cancellation to the trustee for such Indebtedness.

          "Restricted Investment," with respect to any Person, means any
Investment by such Person in any of its Affiliates or in any Person other than a
Wholly Owned Restricted Subsidiary other than (i) a Permitted Investment or 
(ii) an Investment made with the proceeds of a substantially concurrent sale
(other than to a Subsidiary of the Company or an employee stock ownership plan)
of the Company's Qualified Capital Stock.

          "Restricted Note" has the meaning set forth for "Restricted Security"
in Rule 144(a)(3) under the Securities Act; provided that the Trustee shall be
entitled to request and conclusively rely upon an Opinion of Counsel with
respect to whether any Note is a Restricted Note.

          "Restricted Payment" means with respect to any Person:  (i) the
declaration of any dividend (other than a dividend declared by a Wholly Owned
Restricted Subsidiary to holders of its Common Equity) or the making of any
other payment or distribution of cash, securities or other property or assets in
respect of such Person's Capital Stock, except that a dividend payable solely in
Qualified Capital Stock of such Person shall not constitute a Restricted Payment
(for purposes of this clause (i), the declaration of any such dividend, or the
making of any other such distribution, by any Restricted Subsidiary shall only
constitute a Restricted Payment to the extent of the amounts paid or payable to
Persons other than the Company or a Wholly Owned Restricted Subsidiary); 
(ii) any payment on account of the purchase, redemption, retirement or other
acquisition for value of such Person's Capital Stock or any other payment or
distribution made in respect thereof, either directly or indirectly (other than
a payment solely in Qualified Capital Stock); (iii) any Restricted Investment;
or (iv) any Restricted Debt Payment.

          "Restricted Subsidiary" means each of the Subsidiaries of the Company
which, as of the determination date, is not an Unrestricted Subsidiary of the
Company.

          "Rule 144A" means Rule 144A under the Securities Act.

          "Sale and Leaseback Transaction" means with respect to any Person an
arrangement with any bank, insurance company or other lender or investor or to
which such lender or investor is a party, providing for the leasing by such
Person or any of its Subsidiaries of any property or asset of such Person or any
of its Subsidiaries which has been or is being sold or transferred by such
Person or such Subsidiary to such lender or investor or to any Person to whom
funds have been or are to be advanced by such lender or investor on the security
of such property or asset.  Notwithstanding the foregoing, no transaction
exclusively between the Company and any Wholly Owned Restricted Subsidiary shall
be deemed to constitute a Sale and Leaseback Transaction.

          "SEC" means the Securities and Exchange Commission.

          "Securities Act" means the Securities Act of 1933, as amended.

          "Senior Indebtedness" means all Indebtedness of the Company other than
Indebtedness that is specifically designated, by the terms of the instrument
creating or evidencing the same, as not being senior in right of payment to the
Notes.

          "Series A Notes" means the 12% Senior Notes due 2003, Series A, of the
Company issued pursuant to this Indenture.

          "Series B Notes" means the 12% Senior Notes due 2003, Series B, of the
Company to be issued in exchange for the Series A Notes pursuant to the
Registration Rights Agreement.

 
          "Single Purpose Subsidiary" of any Person means a Subsidiary of such
Person which has no Subsidiaries other than Unrestricted Subsidiaries and the
activities of which are limited to (i) ownership of all or a portion of the
interests in a single project constituting one or more Permitted Businesses,
either directly or through the ownership of the Capital Stock of another Person
and (ii) the development, engineering, design, project management, construction
or operation of such project.

          "Subsidiary" of any Person means (i) any corporation of which at least
a majority of the aggregate voting power of all classes of the Common Equity is
owned by such Person directly or through one or more other Subsidiaries of such
Person and (ii) any entity other than a corporation in which such Person,
directly or indirectly, owns at least a majority of the Common Equity of such
entity.

          "Supplemental Indenture" shall mean any supplemental indenture, in
form satisfactory to the Trustee, executed and delivered pursuant to (a) Article
10 of this Indenture or (b) Sections 5.11 or 6.01(a)(A) of this Indenture.

          "TIA" means the Trust Indenture Act of 1939, as amended, as in effect
on the date hereof, except as provided in Section 10.03.

          "Trustee" means the party named as such above until a successor
replaces it in accordance with the applicable provisions of this Indenture and
thereafter means the successor serving hereunder.

          "Trust Officer" means any officer or assistant officer of the Trustee
assigned by the Trustee to administer its corporate trust matters.

          "Unrestricted Subsidiary" means American Venture Holdings, Inc., a
Delaware corporation, American Venture Investments Incorporated, a Delaware
corporation, Excell Development Construction, Inc., a Delaware corporation, ICF
Kaiser Holdings Unlimited, Inc., a Delaware corporation, ICF Leasing
Corporation, Inc., a Delaware corporation, International Systems, Inc., a
Colorado corporation, Cygna Consulting Engineers and Project Management, Inc., a
California corporation, ICF Kaiser Engineers Eastern Europe, Inc., a Delaware
corporation, and ICF Kaiser Netherlands, B.V., a Netherlands corporation, and
each of the other Subsidiaries of the Company so designated by a resolution
adopted by the Board of Directors of the Company and whose creditors have no
direct or indirect recourse (including without limitation recourse with respect
to the payment of principal of or interest on Indebtedness of such Subsidiary)
to the Company or a Restricted Subsidiary other than a Lien on the Capital Stock
of such Unrestricted Subsidiary; provided, however, that (a) no Subsidiary may
be an Unrestricted Subsidiary if it owns any Capital Stock of a Restricted
Subsidiary and (b) the Board of Directors of the Company will be prohibited
after the date of this Indenture from designating as an Unrestricted Subsidiary
any Subsidiary existing on the date of this Indenture. The Board of Directors of
the Company may designate an Unrestricted Subsidiary to be a Restricted
Subsidiary, provided that (i) any such designation shall be deemed to be an
incurrence by the Company and its Restricted Subsidiaries of the Indebtedness
(if any) of such designated Subsidiary for purposes of the provisions of 
Section 5.04 as of the date of such designation and (ii) immediately after
giving effect to such designation and the incurrence of any such additional
Indebtedness, the Company and its Restricted Subsidiaries could incur $1.00 of
additional Senior Indebtedness pursuant to the provisions of Section 5.04. Any
such designation or redesignation by the Board of Directors shall be evidenced
to the Trustee by the filing with the Trustee of a certified copy of the Board
Resolution of the Company giving effect to such designation or redesignation and
an Officers' Certificate certifying that such designation or redesignation
complied with the foregoing conditions and setting forth the underlying
calculations of such Officers' Certificate, and upon which certificate the
Trustee shall conclusively rely without any investigation whatsoever.

          "U.S. Government Obligations" means direct obligations of the United
States of America for the payment of which the full faith and credit of the
United States of America is pledged.

          "Voting Stock", with respect to any Person, means securities of any
class of Capital Stock of such Person entitling the holders thereof (whether at
all times or only so long as no senior class of stock has voting power by reason
of any contingency) to vote in the election of members of the board of directors
of such Person.

 
          "Weighted Average Life to Maturity", when applied to any Indebtedness
at any date, means the number of years obtained by dividing (i) the sum of the
products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payment of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment by (ii) the then outstanding principal
amount of such Indebtedness.

          "Wholly Owned Restricted Subsidiary" of the Company means a Restricted
Subsidiary of the Company, of which 100% of the Common Equity (except for
directors' qualifying shares or certain minority interests owned by other
Persons solely due to local law requirements that there be more than one
stockholder, but which interest is not in excess of what is required for such
purpose) is owned directly by the Company or through one or more Wholly Owned
Restricted Subsidiaries of the Company.

          "Wholly Owned Subsidiary" of the Company means a Subsidiary of the
Company, of which 100% of the Common Equity (except for directors' qualifying
shares or certain minority interests owned by other Persons solely due to local
law requirements that there be more than one stockholder, but which interest is
not in excess of what is required for such purpose) is owned directly by the
Company or one or more Wholly Owned Subsidiaries of the Company.

Section 1.02    Other Definitions



        Term                                          Defined in Section
        ----                                          ------------------
                                                                

"Affiliate Transaction"...........................................5.08(a)
"Asset Sale Offer Date"...........................................5.09(b)
"Asset Sale Offer Period".........................................3.04(a)
"Asset Sale Payment Date".........................................3.04(a)
"Change of Control Offer".........................................5.03(a)
"Change of Control Payment
 Date"............................................................5.03(a)
"Event of Default"...................................................7.01
"incur"...........................................................5.04(a)
"Legal Holiday".....................................................11.06
"Paying Agent".......................................................2.03
"Registrar"..........................................................2.03
"Successor"..........................................................6.01
 

Section 1.03    Incorporation by Reference of Trust Indenture Act

          Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

          All terms used in this Indenture that are defined by the TIA, defined
by TIA reference to another statute or defined by SEC rule under the TIA have
the meanings so assigned to them.

Section 1.04    Rules of Construction

          Unless the context otherwise requires:

(1)       a term has the meaning assigned to it;
(2)       an accounting term not otherwise defined has the meaning assigned
          to it in accordance with GAAP;
(3)       "or" is not exclusive;
(4)       words in the singular include the plural, and in the plural
          include the singular; and
(5)       provisions apply to successive events and transactions.

 
                                   ARTICLE 2
                                   THE NOTES

Section 2.01    Form and Dating

          The Series A Notes and the Trustee's certificate of authentication
thereof shall be substantially in the form of Exhibit A annexed hereto, which is
hereby incorporated in and expressly made a part of this Indenture.  The Series
B Notes and the Trustee's certificate of authentication thereof shall be
substantially in the form of Exhibit B annexed hereto, which is hereby
incorporated in and expressly made a part of this Indenture.  The Notes may have
notations, legends or endorsements required by law, stock exchange rule or
usage.  The Company and the Trustee shall approve any notation, legend or
endorsement on the Notes.  Each Note shall be dated the date of its
authentication.  The Notes shall be in denominations of $1,000 and integral
multiples thereof.

          Notes offered and sold in reliance on Rule 144A and to Institutional
Accredited Investors shall be issued initially in the form of one or more
permanent Global Notes in registered form, substantially in the form set forth
in Exhibit A, deposited with the Trustee, as custodian for the Depository, and
shall bear the legend set forth on Exhibit C.  The aggregate principal amount of
any Global Note may from time to time be increased or decreased by adjustments
made on the records of the Trustee, as custodian for the Depository, as
hereinafter provided.

          Notes offered and sold in offshore transactions in reliance on
Regulation S shall be issued in the form of certificated Notes in registered
form, substantially in the form set forth in Exhibit A (the "Offshore Physical
Notes").  Notes offered and sold in reliance on any other exemption from
registration under the Securities Act other than as described in the preceding
paragraph shall be issued, and Notes offered and sold in reliance on Rule 144A
may be issued, in the form of certificated Notes in registered form in
substantially the form set forth in Exhibit A (the "U.S. Physical Notes").  The
Offshore Physical Notes and the U.S. Physical Notes are sometimes collectively
herein referred to as the "Physical Notes."

          The terms and provisions contained in the Notes shall constitute, and
are hereby expressly made, a part of this Indenture and to the extent applicable
the Company and the Trustee, by their execution and delivery of this Indenture,
expressly agree to such terms and provisions and to be bound thereby.

Section 2.02    Execution and Authentication

          Two Officers shall sign the Notes for the Company by manual or
facsimile signature.  The Company's seal shall be reproduced on the Notes and
may be in facsimile form.

          If an Officer whose signature is on a Note no longer holds that office
at the time the Note is authenticated, the Note nevertheless shall be valid.

          A Note shall not be valid until authenticated by the manual signature
of the Trustee. The signature shall be conclusive evidence that the Note has
been authenticated under this Indenture.

          The Trustee shall authenticate (a) Series A Notes for original issue
in the aggregate principal amount not to exceed $15,000,000 and (b) Series B
Notes from time to time for issue only in exchange for a like principal amount
of Series A Notes, in each case upon the receipt of a Company Order.  The
aggregate principal amount of Notes outstanding at any time may not exceed
$15,000,000, except as provided in Section 2.06.

          The Trustee may appoint an authenticating agent acceptable to the
Company to authenticate Notes.  An authenticating agent may authenticate Notes
whenever the Trustee may do so.  Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent.  An
authenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate.

Section 2.03    Registrar and Paying Agent

 
          The Company shall maintain an office or agency where Notes may be
presented for registration of transfer or for exchange ("Registrar") and an
office or agency where Notes may be presented for payment ("Paying Agent").  The
Registrar shall keep a register of the Notes and of their transfer and exchange.
The Company may appoint one or more co-registrars and one or more additional
paying agents.  The term "Registrar" includes any co-registrar and the term
"Paying Agent" includes any additional paying agent.  The Company may change any
Paying Agent or Registrar without notice to any Holder.  The Company shall
notify the Trustee of the name and address of any Agent not a party to this
Indenture.  If the Company fails to appoint or maintain another entity as
Registrar or Paying Agent, the Trustee shall act as such.  The Company or any of
its Subsidiaries may act as Paying Agent or Registrar.

          Each Note shall be dated the date of its authentication.

Section 2.04    Paying Agent to Hold Money in Trust

          The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent will hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal of, premium, if any, or interest on the Notes, and will notify the
Trustee of any default by the Company in making any such payment.  While any
such default continues, the Trustee may require a Paying Agent to pay all money
held by it to the Trustee.  The Company at any time may require a Paying Agent
to pay all money held by it to the Trustee.  Upon payment over to the Trustee,
the Paying Agent (if other than the Company or a Subsidiary) shall have no
further liability for the money.  If the Company or a Subsidiary acts as Paying
Agent, it shall segregate and hold in a separate trust fund for the benefit of
the Holders all money held by it as Paying Agent.

Section 2.05    Registration of Transfer and Exchange

          (a)   Transfer and Exchange of Physical Notes.  When Physical Notes
                ---------------------------------------
are presented to the Registrar with a request:

(i)       to register the transfer of the Physical Notes; or

(ii)      to exchange such Physical Notes for an equal number of Physical Notes
          of other authorized denominations,

the Registrar shall register the transfer or make the exchange as requested if
the requirements under this Indenture as set forth in this Section 2.05 for such
transactions are met; provided, however, that the Physical Notes presented or
surrendered for registration of transfer or exchange:

          (A) shall be duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Registrar, duly executed by the Holder
thereof or his attorney duly authorized in writing; and

          (B) in the case of Physical Notes the offer and sale of which have not
been registered under the Securities Act, such Physical Notes shall be
accompanied, in the sole discretion of the Company, by the following additional
information and documents, as applicable:

          (I) if such Physical Note is being delivered to the Registrar by a
Holder for registration in the name of such Holder, without transfer, a
certification from such Holder to that effect (substantially in the form of
Exhibit D hereto); or

         (II) if such Physical Note is being transferred to a Qualified
Institutional Buyer in accordance with Rule 144A, a certification to that effect
(substantially in the form of Exhibit D hereto); or

        (III) if such Physical Note is being transferred to an Institutional
Accredited Investor, delivery of a certification to that effect (substantially
in the form of Exhibit D hereto) and a Transferee Certificate for Institutional
Accredited Investors substantially in the form of Exhibit E hereto; or

 
         (IV) if such Physical Note is being transferred in reliance on
Regulation S, delivery of a certification to that effect (substantially in the
form of Exhibit D hereto), a Transferee Certificate for Regulation S Transfers
substantially in the form of Exhibit F hereto and an Opinion of Counsel
reasonably satisfactory to the Company to the effect that such transfer is in
compliance with the Securities Act; or

          (V) if such Physical Note is being transferred in reliance on Rule 144
under the Securities Act, delivery of a certification to that effect
(substantially in the form of Exhibit D hereto) and an Opinion of Counsel
reasonably satisfactory to the Company to the effect that such transfer is in
compliance with the Securities Act; or

         (VI) if such Physical Note is being transferred in reliance on another
exemption from the registration requirements of the Securities Act, a
certification to that effect (substantially in the form of Exhibit D hereto) and
an Opinion of Counsel reasonably acceptable to the Company to the effect that
such transfer is in compliance with the Securities Act.

          (b)   Restrictions on Exchange of a Physical Note for a Beneficial
                ------------------------------------------------------------  
Interest in a Global Note. A Physical Note may not be exchanged for a beneficial
- -------------------------
interest in a Global Note except upon satisfaction of the requirements set forth
below. Upon receipt by the Registrar of a Physical Note, duly endorsed or
accompanied by appropriate instruments of transfer, in form satisfactory to the
Registrar, together with:

          (i)   certification, substantially in the form of Exhibit D hereto,
that such Physical Note is being transferred (A) to a Qualified Institutional
Buyer, (B) to an Accredited Investor or (C) in an offshore transaction in
reliance on Regulation S; and

         (ii)   a Company Order directing the Registrar to make, or to direct
the Depository to make, an endorsement on the applicable Global Note to reflect
an increase in the aggregate amount of the Notes represented by the Global Note,

then the Registrar shall cancel such Physical Note and cause, or direct the
Depository to cause, in accordance with the standing instructions and procedures
existing between the Depository and the Registrar, the principal amount of Notes
represented by the applicable Global Note to be increased accordingly.  If no
Global Note is then outstanding, the Company shall issue and the Trustee shall,
upon a Company Order in accordance with Section 2.02, authenticate such a Global
Note in the appropriate principal amount.

        (c)     Transfer and Exchange of Global Notes.  The transfer and 
                -------------------------------------
exchange of Global Notes or beneficial interests therein shall be effected
through the Depository in accordance with this Indenture (including the
restrictions on transfer set forth herein) and the procedures of the Depository
therefor.

        (d)     Transfer of a Beneficial Interest in a Global Note for a 
                --------------------------------------------------------
Physical Note.
- -------------
        
        (i)     Any Person having a beneficial interest in a Global Note may
upon request exchange such beneficial interest for a Physical Note. Upon receipt
by the Registrar of a Company Order, or such other form of instructions as is
customary for the Depository, from the Depository or its nominee on behalf of
any Person having a beneficial interest in a Global Note and upon receipt by the
Trustee of a written order or such other form of instructions as is customary
for the Depository or the Person designated by the Depository as having such a
beneficial interest containing registration instructions and, in the case of any
such transfer or exchange of a beneficial interest in Notes the offer and sale
of which have not been registered under the Securities Act, the following
additional information and documents:

        (A) if such beneficial interest is being transferred to the Person
designated by the Depository as being the beneficial owner, a certification from
such Person to that effect (substantially in the form of Exhibit D hereto); or

        (B) if such beneficial interest is being transferred to a Qualified
Institutional Buyer in accordance with Rule 144A, a certification to that effect
(substantially in the form of Exhibit D hereto); or

 
         (C) if such beneficial interest is being transferred to an
Institutional Accredited Investor, delivery of a certification to that effect
(substantially in the form of Exhibit D hereto) and a Certificate for
Institutional Accredited Investors substantially in the form of Exhibit E
hereto; or

         (D) if such beneficial interest is being transferred in reliance on
Regulation S, delivery of a certification to that effect (substantially in the
form of Exhibit D hereto) and a Transferee Certificate for Regulation S
Transfers substantially in the form of Exhibit F hereto and an Opinion of
Counsel reasonably satisfactory to the Company to the effect that such transfer
is in compliance with the Securities Act; or

         (E) if such beneficial interest is being transferred in reliance on
Rule 144 under the Securities Act, delivery of a certification to that effect
(substantially in the form of Exhibit D hereto) and an Opinion of Counsel
reasonably satisfactory to the Company to the effect that such transfer is in
compliance with the Securities Act; or

         (F) if such beneficial interest is being transferred in reliance on
another exemption from the registration requirements of the Securities Act, a
certification to that effect (substantially in the form of Exhibit D hereto) and
an Opinion of Counsel reasonably satisfactory to the Company to the effect that
such transfer is in compliance with the Securities Act,

         then the Registrar will cause, in accordance with the standing
instructions and procedures existing between the Depository and the Registrar,
the aggregate principal amount of the applicable Global Note to be reduced and,
following such reduction, the Company will execute and, upon receipt of an
authentication order in the form of an Officers' Certificate in accordance with
Section 2.02, the Trustee will authenticate and deliver to the transferee a
Physical Note.

         (ii) Notes issued in exchange for a beneficial interest in a Global
Note pursuant to this Section 2.05(d) shall be registered in such names and in
such authorized denominations as the Depository, pursuant to instructions from
its direct or indirect participants or otherwise, shall instruct the Registrar
in writing. The Registrar shall deliver such Physical Notes to the Persons in
whose names such Physical Notes are so registered.

         (e) Restrictions on Transfer and Exchange of Global Notes.
             -----------------------------------------------------    
Notwithstanding any other provisions of this Indenture, a Global Note may not be
transferred as a whole except by the Depository to a nominee of the Depository
or by a nominee of the Depository to the Depository or another nominee of the
Depository or by the Depository or any such nominee to a successor Depository or
a nominee of such successor Depository.

         (f) Private Placement Legend. Upon the transfer, exchange or
             ------------------------
replacement of Notes not bearing the Private Placement Legend, the Registrar
shall deliver Notes that do not bear the Private Placement Legend. Upon the
transfer, exchange or replacement of Notes bearing the private Placement Legend,
the Registrar shall deliver only Notes that bear the Private Placement Legend
unless, and the Trustee is hereby authorized to deliver Notes without the
Private Placement Legend if, (i) there is delivered to the Trustee an Opinion of
Counsel reasonably satisfactory to the Company and the Trustee to the effect
that neither such legend nor the related restrictions on transfer are required
in order to maintain compliance with the provisions of the Securities Act or
(ii) such Note has been sold pursuant to an effective registration statement
under the Securities Act.

         (g) General. By its acceptance of any Note bearing the Private
             -------
Placement Legend, each Holder of such a Note acknowledges the restrictions on
transfer of such Note set forth in this Indenture and in the Private Placement
Legend and agrees that it will transfer such Note only as provided in this
Indenture.

         The Registrar shall retain copies of all letters, notices and other
written communications received pursuant to Section 2.13 or this Section 2.05.
The Company shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

         No service charge shall be made to a Holder for any registration of
transfer or exchange (except as otherwise expressly permitted herein), but the
Company may require payment of a sum sufficient to cover any transfer tax or

 
similar governmental charge payable in connection therewith (other than such
transfer tax or similar governmental charge payable upon exchanges pursuant to
Section 10.05 or the Registration Rights Agreement).

         Without the prior consent of the Company, the Registrar is not required
(a) to register the transfer or exchange of any Note selected for redemption,
(b) to register the transfer or exchange of any Note for a period of 15 days
before a selection of Notes to be redeemed or (c) to register the transfer or
exchange of a Note between a record date and the next succeeding interest
payment date.

Section 2.06  Replacement Notes

         If any mutilated Note is surrendered to the Trustee, or the Company and
the Trustee receive evidence to their satisfaction of the destruction, loss or
theft of any Note, the Company shall issue and the Trustee, upon receipt of a
Company Order, shall authenticate a replacement Note if the Trustee's
requirements are met. The Trustee or the Company may require that the Holder
supply an indemnity bond that is sufficient in the judgment of the Trustee and
the Company to protect the Company, the Trustee, any Agent or any authenticating
agent from any loss which any of them may suffer if a Note is replaced. The
Company may charge for its expenses in replacing a Note.

         Every replacement Note is an additional obligation of the Company.

Section 2.07  Outstanding Notes

         The Notes outstanding at any time are all the Notes authenticated by
the Trustee except for those canceled by it, those delivered to it for
cancellation and those described in this Section 2.07 as not outstanding.

         If a Note is replaced pursuant to Section 2.06, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser.

         If the principal amount of any Note is considered paid under Section
5.01, it ceases to be outstanding and interest on it ceases to accrue.

         Except as set forth in Section 2.08, a Note does not cease to be
outstanding because the Company or an Affiliate holds the Note.

Section 2.08  Treasury Notes

         In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Company or by any Affiliate of the Company shall be considered as though not
outstanding, except that for the purposes of determining whether the Trustee
shall be protected in relying on any such direction, waiver or consent, only
Notes which the Trustee actually knows are so owned shall be so disregarded.

Section 2.09  Temporary Notes

         Until definitive Notes are ready for delivery, the Company may prepare
and the Trustee shall authenticate temporary Notes. Temporary Notes shall be
substantially in the form of definitive Notes but may have variations that the
Company considers appropriate for temporary Notes. Without unreasonable delay,
the Company shall prepare and the Trustee shall authenticate definitive Notes in
exchange for temporary Notes.

Section 2.10  Cancellation

         The Company at any time may deliver Notes to the Trustee for
cancellation. The Registrar and Paying Agent shall forward to the Trustee any
Notes surrendered to them for registration of transfer, exchange or payment. The
Trustee shall cancel all Notes surrendered for registration of transfer,
exchange, payment, replacement or cancellation. Unless the Company shall direct
by a written order signed by two Officers that canceled Notes be returned to it,
certification of their destruction shall be delivered to the Company. The
Company may not issue new Notes to replace

 
Notes that it has paid or that have been delivered to the Trustee for
cancellation, provided, however, that the Trustee shall not be required to
destroy Notes.

Section 2.11  Defaulted Interest

         If the Company defaults in a payment of interest on the Notes, it shall
pay the defaulted interest in any lawful manner plus, to the extent lawful, any
interest payable on the defaulted interest, to the Persons who are Holders on a
subsequent special record date, in each case at the rate provided in the Notes
and in Section 5.01. The Company, with the consent of the Trustee, shall fix
each such special record date and payment date. At least 15 days before the
record date, the Company (or the Trustee, in the name of and at the expense of
the Company) shall mail to Holders a notice that states the special record date,
the related payment date and the amount of such interest to be paid.

Section 2.12  CUSIP Numbers

         The Company in issuing the Notes may use "CUSIP" numbers (if then
generally in use), and, if so, the Trustee shall use "CUSIP" numbers in notices
of redemption as a convenience to Holders; provided that any such notice may
state that no representation is made as to the correctness of such numbers
either as printed on the Notes or as contained in any notice of a redemption and
that reliance may be placed only on the other identification numbers printed on
the Notes, and any such redemption shall not be affected by any defect in or
omission of such numbers.

Section 2.13  Book-Entry Provisions for Global Notes

         (a) The Global Notes initially shall (i) be registered in the name of
the Depository or the nominee of such Depository, (ii) be delivered to the
Trustee as custodian for such Depository and (iii) bear legends as set forth in
Exhibit C.

         Members of, or participants in, the Depository ("Participants") shall
have no rights under this Indenture with respect to any Global Note held on
their behalf by the Depository, or the Trustee as its custodian, or under the
Global Note, and the Depository may be treated by the Company, the Trustee and
any agent of the Company or the Trustee as the absolute owner of the Global Note
for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall
prevent the Company, the Trustee or any agent of the Company or the Trustee from
giving effect to any written certification, proxy or other authorization
furnished by the Depository or impair, as between the Depository and
Participants, the operation of customary practices governing the exercise of the
rights in a Holder of any Note.

         (b) Transfers of Global Notes shall be limited to transfers in whole,
but not in part, to the Depository, its successors or their respective nominees.
Interests of beneficial owners in the Global Notes may be transferred or
exchanged for Physical Notes in accordance with the rules and procedures of the
Depository and the provisions of Section 2.05. In addition, Physical Notes shall
be transferred to all beneficial owners in exchange for their beneficial
interests in Global Notes if (i) the Depository notifies the Company that it is
unwilling or unable to continue as Depository for any Global Note and a
successor Depository is not appointed by the Company within 90 days of such
notice or (ii) an Event of Default has occurred and is continuing and the
Registrar has received a request from the Depository to issue Physical Notes.

         (c) In connection with the transfer of Global Notes as an entirety to
beneficial owners pursuant to paragraph (b) of this Section 2.13, the Global
Notes shall be deemed to be surrendered to the Trustee for cancellation, and the
Company shall execute, and the Trustee shall upon receipt of Company Order
authenticate and deliver, to each beneficial owner identified by the Depository
in exchange for its beneficial interest in the Global Notes, an equal aggregate
principal amount of Physical Notes of authorized denominations.

         (d) Any Physical Notes constituting a Restricted Note delivered in
exchange for an interest in a Global Note pursuant to paragraph (b) of this
Section 2.13 shall, except as otherwise provided by Section 2.05, bear the
Private Placement Legend.

 
          (e)  The Holder of any Global Note may grant proxies and otherwise
authorize any Person, including Participants and Persons that may hold interests
through Participants, to take any action which a Holder is entitled to take
under this Indenture or the Notes.

                                   ARTICLE 3
                               ASSET SALE OFFER

Section 3.01   Notices to Trustee

          If the Company offers to purchase Notes pursuant to the provisions of
Section 3.04, it shall furnish to the Trustee, within five days after an Asset
Sale Offer Date, an Officers' Certificate setting forth the Asset Sale Payment
Date, the principal amount of Notes the Company is offering to purchase and the
purchase price of such Notes, and further setting forth a statement to the
effect that (a) the Company has consummated an Asset Sale and (b) the conditions
set forth in Section 5.09(a) have been satisfied.

Section 3.02   Notices to Holders

          (a)  As provided in Section 3.04, within 15 days after an Asset Sale
Offer Date, the Company shall mail a notice by first-class mail to each Holder.

          (b)  The notice shall state:

          (1)  that an Asset Sale Offer is being made pursuant to Section 3.04
and the length of time the Asset Sale Offer will remain open;
          (2)  the purchase price and the Asset Sale Payment Date;
          (3)  the principal amount of Notes the Company is offering to
purchase;
          (4)  that any Note not tendered or accepted for payment will continue
to accrue interest;
          (5)  that any Note accepted for payment pursuant to the Asset Sale
Offer shall cease to accrue interest on the Asset Sale Payment Date;
          (6)  that Holders electing to have a Note purchased pursuant to any
Asset Sale Offer will be required to surrender the Note, with the form entitled
"Option of Holder to Elect Purchase" on the reverse side of the Note completed,
to the Company, a depository if appointed by the Company or a Paying Agent at
the address specified in the notice prior to termination of the Asset Sale
Offer;
          (7)  that Holders will be entitled to withdraw their election if the
Company, depository or Paying Agent, as the case may be, receives, not later
than the expiration of the Asset Sale Offer Period, or such longer period as may
be required by law, a telegram, facsimile transmission or letter setting forth
the name of the Holder, the principal amount of the Note the Holder delivered
for purchase and a statement that such Holder is withdrawing his election to
have the Note purchased;
          (8)  that, if the aggregate principal amount of Notes surrendered by
Holders exceeds the aggregate principal amount of Notes offered to be purchased,
the Company shall select the Notes to be purchased on a pro rata basis or by lot
(with such adjustments as may be deemed appropriate by the Company so that only
Notes in denominations of $1,000 or integral multiples thereof shall be
purchased);
          (9)  that Holders whose Notes are purchased only in part will be
issued new Notes equal in principal amount to the unpurchased portion of the
Notes surrendered; and
          (10) the instructions that Holders must follow to tender their Notes.

          (c)  At the Company's written request, the Trustee shall give any
notice required in this Section 3.02 in the Company's name and at its expense;
provided, however, that the Company shall deliver to the Trustee on or prior to
the fifth day following an Asset Sale Offer Date an Officers' Certificate
requesting that the Trustee give such notice and setting forth the information
to be stated in such notice as provided in this Section 3.02.

 
Section 3.03  Deposit of Purchase Price

          One Business Day prior to the Asset Sale Payment Date, the Company
shall deposit with the Trustee or with the Paying Agent money sufficient to pay
the purchase price of, and accrued interest on, all Notes to be purchased on
that date. Upon completion of any Asset Sale Offer, the Trustee shall return to
the Company any money not required for that purpose.

          If the Company complies with the preceding paragraph, interest on the
Notes or portions thereof purchased pursuant to any Asset Sale Offer will cease
to accrue on the Asset Sale Payment Date. If any Note to be purchased shall not
be so paid on the Asset Sale Payment Date, because of the failure of the Company
to comply with the preceding paragraph, then interest will be paid on the unpaid
principal from the Asset Sale Payment Date until such principal is paid and on
any interest not paid on such unpaid principal, in each case, at the rate
provided in the Notes and in Section 5.01.

Section 3.04  Asset Sale Offer

          (a) Within 15 days after an Asset Sale Offer Date, the Company shall
mail (with notice to the Trustee) or shall cause the Trustee to mail (in the
Company's name and at its expense) notice of any Asset Sale Offer to each Holder
of Notes as set forth in Section 3.02. The Asset Sale Offer shall be deemed to
have commenced on the date of such mailing and shall terminate 20 Business Days
after its commencement unless a longer offering period is required by law (the
"Asset Sale Offer Period"). Promptly after the termination of the Asset Sale
Offer Period (the "Asset Sale Payment Date"), the Company shall purchase and
mail or deliver payment for, on a pro rata basis or as selected by lot, from
Holders tendering their Notes pursuant to an Asset Sale Offer, the amount of
Notes required to be purchased pursuant to Section 5.09. If an Asset Sale
Payment Date is on or after an interest payment record date and on or before the
related Interest Payment Date, accrued interest will be paid to the Person in
whose name a Note is registered at the close of business on such record date,
and no additional interest will be payable to Holders who tender Notes pursuant
to any such Asset Sale Offer.

          (b) On or before any Asset Sale Payment Date, the Company, to the
extent lawful, shall (i) accept for payment (on a pro rata basis or as selected
by lot) Notes or portions thereof tendered pursuant to the Asset Sale Offer,
(ii) if the Company appoints a depositary or Paying Agent, deposit with such
depositary or Paying Agent money sufficient to pay the purchase price of all
Notes or portions thereof so accepted, (iii) deliver or cause the depositary or
Paying Agent to deliver to the Trustee Notes so accepted and (iv) deliver an
Officers' Certificate identifying the Notes or portions thereof accepted for
payment by the Company in accordance with the terms of this Section 3.04. The
depositary, the Paying Agent or the Company, as the case may be, promptly shall
mail or deliver to each tendering Holder an amount equal to the purchase price
of the Notes tendered by such Holder and accepted by the Company for purchase
and the Trustee promptly shall authenticate and mail or deliver to any such
Holder a new Note equal in principal amount to any unpurchased portion of the
Note surrendered by such Holder. Any Notes not so accepted promptly shall be
mailed or delivered by the Company to the Holder thereof. The Company will
publicly announce the results of any Asset Sale Offer on the Asset Sale Payment
Date.

          (d) Any offer to purchase Notes pursuant to this Section 3.04 shall be
made pursuant to the provisions of Sections 3.01, 3.02 and 3.03.

          (e) Any such offer shall be conducted in compliance with applicable
tender offer rules, including Section 14(e) of the Exchange Act and Rule 14e-1
thereunder, and any other applicable securities laws or regulations.

                                   ARTICLE 4
                              OPTIONAL REDEMPTION

Section 4.01  Redemption Date; Redemption Price

 
          The Notes may not be redeemed prior to December 31, 1998, but will be
redeemable at the option of the Company, in whole or in part, at any time on or
after December 31, 1998, at the following redemption prices (expressed as
percentages of principal amount), together with accrued and unpaid interest
thereon to the redemption date, if redeemed during the 12-month period beginning
December 31:
 
          Year         Optional Redemption Price
          ----         -------------------------
          1998         108.0%
          1999         106.4
          2000         104.8
          2001         103.2
          2002         101.6

On and after the redemption date, interest will cease to accrue on the Notes or
portions thereof called for redemption.

Section 4.02  Notices to Trustee and Paying Agent

          If the Company elects to redeem Notes pursuant to Section 4.01 and
Section 5 of the Notes, it shall notify the Trustee and the Paying Agent in
writing of the redemption date and the principal amount of Notes to be redeemed.
The Company shall give each notice provided for in this Section 4.02 at least 60
days before the redemption date, together with an Officers' Certificate stating
that such redemption shall comply with the conditions contained herein and in
the Notes.

Section 4.03  Selection of Notes to be Redeemed

          If less than all of the Notes are to be redeemed at any time, the
Trustee shall select the Notes to be redeemed in compliance with the
requirements of the principal national securities exchange, if any, on which the
Notes being redeemed are listed or, if the Notes are not listed on a national
securities exchange, on a pro rata basis, by lot or by such other method as the
Trustee shall deem fair and appropriate.

          The Trustee shall make the selection from the Notes outstanding and
not previously called for redemption.  The Trustee promptly shall notify the
Company in writing of such Notes selected for redemption and, in the case of
Notes selected for partial redemption, the principal amount to be redeemed.  The
Trustee may select for redemption portions (equal to $1,000 or any integral
multiple thereof) of the principal of Notes that have denominations larger than
$1,000.  The Notes and portions thereof the Trustee selects shall be in amounts
of $1,000 or integral multiples of $1,000.  Provisions of this Indenture that
apply to Notes called for redemption also apply to portions of Notes called for
redemption.

Section 4.04  Notice to Holders

          At least 30 days but not more than 60 days prior to a redemption date,
the Company shall mail or cause the mailing of a notice of redemption by first-
class mail to each Holder of Notes to be redeemed and the Trustee and Paying
Agent.

          The notice shall identify the Notes, including "CUSIP" number, to be
redeemed and shall state:

     (1)  the redemption date;
     (2)  the redemption price and the amount of accrued interest, if any, to be
paid;
     (3)  the name and address of the Paying Agent;
     (4)  that Notes called for redemption must be surrendered to the Paying
Agent to collect the redemption price and accrued interest, if any;
     (5)  that, unless the Company defaults in making the redemption payment,
interest on Notes called for redemption ceases to accrue on and after the
redemption date and the only remaining right of the Holders is to receive
payment of the redemption price, together with accrued and unpaid interest
thereon to the redemption date, upon surrender to the Trustee or the Paying
Agent of the Notes so redeemed;

 
     (6)  if any Note is being redeemed in part, the portion of the principal
amount (equal to $1,000 or any integral multiple thereof) of such Note to be
redeemed, and that, on and after the redemption date, upon surrender of such
Note, a new Note or Notes in principal amount equal to the unredeemed portion
thereof shall be issued without charge to the Holder; and
     (7)  if less than all of the Notes are to be redeemed, the identification
of the particular Notes (or portion thereof) to be redeemed, as well as the
aggregate principal amount of Notes to be redeemed and the aggregate principal
amount of Notes estimated to be outstanding after the redemption.

At the Company's request, the Trustee shall give the notice of redemption in the
Company's name and at the Company's expense.

Section 4.05  Effect of Notice of Redemption

         Once notice of redemption is mailed, Notes called for redemption become
due and payable on the redemption date and at the redemption price and shall
cease to bear interest from and after the redemption date (unless the Company
shall default in the payment of the redemption price or accrued interest). Upon
surrender to the Paying Agent, such Notes shall be paid at the redemption price,
plus accrued interest to the redemption date but any interest installment with
respect to an Interest Payment Date that is on or prior to such redemption date
shall be payable on such Interest Payment Date to Holders of record at the close
of business on the record date referred to in the Notes.

Section 4.06  Deposit of Redemption Price

         At least one Business Day prior to the redemption date, the Company
shall deposit with the Paying Agent money sufficient to pay the redemption price
of and accrued interest on all Notes or portions thereof to be redeemed on that
date.

         If any Note surrendered for redemption in the manner provided in this
Indenture shall not be so paid on the redemption date due to the failure of the
Company to deposit sufficient funds with the Paying Agent, interest shall
continue to accrue from the redemption date until such payment is made on the
unpaid principal and, to the extent lawful, on any interest not paid on such
unpaid principal, in each case at the date and in the manner provided in the
Notes.

Section 4.07  Notes Redeemed in Part

         Upon surrender of a Note that is redeemed in part, the Company shall
issue and the Trustee shall authenticate for the Holder a new Note equal in
principal amount to the unredeemed portion of the Note surrendered.

                                 ARTICLE 5
                                 COVENANTS

Section 5.01  Payment of Notes

         The Company shall pay the principal of, premium, if any, and interest
on the Notes on the dates and in the manner provided in the Notes. Principal of,
premium, if any, and interest shall be considered paid on the date due if the
Paying Agent, other than the Company or a Subsidiary of the Company, holds on
that date money deposited by the Company designated for and sufficient to pay
all principal of, premium, if any, and interest then due.

         The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal at the rate equal to
1% per annum in excess of the then applicable interest rate on the Notes to the
extent lawful; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest
(without regard to any applicable grace period) at the same rate to the extent
lawful.

 
Section 5.02  Maintenance of Office or Agency

          The Company will maintain, in the Borough of Manhattan, The City of
New York, an office or agency (which may be an office of the Trustee or the
Registrar) where Notes may be surrendered for registration of transfer or
exchange and where notices and demands to or upon the Company in respect of the
Notes 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.

          The Company also from time to time may designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and from time to time may 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 Borough of
Manhattan, The City of New York 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.

          The Company hereby designates the Corporate Trust Office of the
Trustee as one such office or agency of the Company in accordance with Section
2.03.

Section 5.03  Change of Control

          (a) Upon the occurrence of a Change of Control, the Company will offer
(a "Change of Control Offer") to purchase all outstanding Notes at a purchase
price equal to 101% of the aggregate principal amount of the Notes, plus accrued
and unpaid interest, if any, to the date of purchase.  The Change of Control
Offer shall be deemed to have commenced upon mailing of the notice described in
Section 5.03(b), which notice shall specify a payment date (which shall be no
earlier than 30 days nor later than 60 days from the date such notice is
mailed), and shall terminate on the specified payment date, unless a longer
offering period is required by law.  Promptly after the termination of the
Change of Control Offer (the "Change of Control Payment Date"), the Company will
purchase and mail or deliver payment for all Notes tendered in response to the
Change of Control Offer.  If the Change of Control Payment Date is on or after
an interest payment record date and on or before the related Interest Payment
Date, any accrued interest will be paid to the Person in whose name a Note is
registered at the close of business on such record date, and no additional
interest will be payable to Holders who tender Notes pursuant to the Change of
Control Offer.

          (b) Within 30 days after any Change of Control, the Company, or the
Trustee at the Company's request and expense, will mail or cause to be mailed to
all Holders on the date of the Change of Control a notice of the occurrence of
such Change of Control. Such notice, which shall govern the terms of the Change
of Control Offer, shall state:

          (1) that a Change of Control has occurred and that the Holders have
the right to require the Company to purchase any or all of the outstanding Notes
at a purchase price equal to 101% of the principal amount thereof plus accrued
and unpaid interest, if any, to the date of purchase;

          (2) that the Change of Control Offer is being made pursuant to this
Section 5.03 and the length of time the Change of Control Offer will remain
open;

          (3) the purchase price and the Change of Control Payment Date;

          (4) that any Note not tendered will continue to accrue interest;

          (5) that any Note accepted for payment pursuant to the Change of
Control Offer shall cease to accrue interest on the Change of Control Payment
Date;

 
          (6)  that Holders electing to have a Note purchased pursuant to any
Change of Control Offer will be required to surrender the Note, with the form
entitled "Option of Holder to Elect Purchase" on the reverse side of the Note
completed, to the Company, a depository if appointed by the Company or a Paying
Agent at the address specified in the notice prior to termination of the Change
of Control Offer;

          (7)  that Holders will be entitled to withdraw their election if the
Company, depository or Paying Agent, as the case may be, receives, not later
than the expiration of the Change of Control Offer, or such longer period as may
be required by law, a telegram, facsimile transmission or letter setting forth
the name of the Holder, the principal amount of the Note the Holder delivered
for purchase and a statement that such Holder is withdrawing his election to
have the Note purchased;

          (8)  that Holders whose Notes are purchased only in part will be
issued Notes equal in principal amount to the unpurchased portion of the Notes
surrendered;

          (9)  the instructions, determined by the Company consistent with this
Indenture, that Holders must follow in order to have their Notes purchased;

          (10) the circumstances and relevant facts regarding such Change of
Control (including without limitation information with respect to pro forma
historical income, cash flow and capitalization after giving effect to such
Change of Control); and

          (11) information regarding the Persons acquiring control and an
information regarding such Person's business plans going forward.

          (c)  On, but in no event before, a Change of Control Payment Date, the
Company, to the extent lawful, will:  (i) deposit with the depository or Paying
Agent, if the Company appoints any depository or Paying Agent, money in
immediately available funds sufficient to pay the purchase price of all Notes
tendered; (ii) deliver or cause such depository or Paying Agent to deliver to
the Trustee Notes so tendered; and (iii) deliver an Officers' Certificate
identifying the Notes accepted for payment by the Company in accordance with the
terms of this Section 5.03.  The depository, the Paying Agent or the Company, as
the case may be, promptly shall mail or deliver to each tendering Holder an
amount equal to the purchase price of the Notes tendered by such Holder and
accepted by the Company for purchase, and the Trustee promptly shall
authenticate and mail or deliver to such Holders a new Note equal in principal
amount to any unpurchased portion of the Note so surrendered. Any Notes not
accepted promptly shall be mailed or delivered by the Company to the Holder
thereof.  The Company publicly will announce the results of the Change of
Control Offer on the Change of Control Payment Date.

          (d)  Neither the Board of Directors nor the stockholders of the
Company may adopt a Plan of Liquidation that provides for or contemplates, or
the effectuation of which is preceded by, (i) the sale, lease, conveyance or
other disposition of all or substantially all of the assets of the Company
otherwise than substantially as an entirety, and (ii) the distribution of all or
substantially all of the proceeds of such sale, lease, conveyance or other
disposition and of the remaining assets of the Company to the holders of the
Company's Capital Stock unless, prior to making any liquidating distribution
pursuant to such Plan of Liquidation, the Company makes provision for the
satisfaction of its obligations hereunder and under the Notes. The Company shall
be deemed to have made provision for such payments only if the Company delivers
in trust to the Trustee or Paying Agent (other than the Company or a Subsidiary)
money or U.S. Government Obligations maturing as to principal and interest in
such amounts and at such times as are sufficient without consideration of any
reinvestment of such principal or interest to pay, when due, the principal of
and interest on the Notes and also delivers to the Trustee an Opinion of Counsel
or a tax ruling to the effect that Holders of the Notes will not recognize
income, gain or loss for federal income tax purposes as a result of such action
and will be subject to federal income tax on the same amount and in the same
manner and at the same times as would have been the case if such action has not
been taken; provided, however, that the Company shall not make any liquidating
distribution until after the Company shall have certified to the Trustee with an
Officers' Certificate at least five days prior to the making of any liquidating
distribution that it has complied with the provisions of this Section 5.03(d)
and that no Default or Event of Default then exists or would occur as a result
of any such liquidating distribution.

 
          (e) Any Change of Control Offer will be conducted in compliance with
applicable tender offer rules, including Section 14(e) of the Exchange Act and
Rule 14e-1 promulgated thereunder, and any other applicable securities laws or
regulations.

Section 5.04  Limitations on Additional Indebtedness

          (a) After the date hereof: (i) the Company will not, and will not
permit any of its Restricted Subsidiaries to, directly or indirectly, create,
incur, assume, guarantee, extend the maturity of or otherwise become liable with
respect to (collectively, "incur"), any Indebtedness (including without
limitation Acquired Indebtedness), other than (A) Junior Subordinated
Indebtedness incurred by the Company in compliance with the provisions of the
immediately following sentence or (B) Indebtedness between the Company and its
Wholly Owned Restricted Subsidiaries (provided that such Indebtedness of the
Company to any Wholly Owned Restricted Subsidiary is expressly subordinated in
right of payment to the Notes) or among such Wholly Owned Restricted
Subsidiaries (provided, however, that any subsequent issue or transfer of any
Capital Stock that results in any such Wholly Owned Restricted Subsidiary
ceasing to be a Wholly Owned Restricted Subsidiary or any transfer of such
Indebtedness (other than to a Wholly Owned Restricted Subsidiary) shall be
deemed, in each case, to constitute the incurrence of such Indebtedness by the
Company) and (ii) the Company will not permit any of its Restricted Subsidiaries
to issue (except to the Company or any of its Wholly Owned Restricted
Subsidiaries) any Capital Stock having a preference in liquidation or with
respect to the payment of dividends, unless, after giving effect thereto, the
Company's Consolidated Fixed Charge Coverage Ratio on the date thereof would be
at least:

          (1) 2.25 to 1, if such date is on or prior to February 28, 1998; and

          (2) 2.50 to 1, if such date is after February 28, 1998,

in each case determined on a pro forma basis as if the incurrence of such
additional Indebtedness or the issuance of such Capital Stock, as the case may
be, and the application of the net proceeds therefrom, had occurred at the
beginning of the four-quarter period used to calculate the Company's
Consolidated Fixed Charge Coverage Ratio.  In addition, after the date hereof
the Company will not directly or indirectly incur any Junior Subordinated
Indebtedness unless, after giving effect thereto, the Company's Consolidated
Fixed Charge Coverage Ratio on the date thereof would be at least 1.50 to 1, in
each case determined on a pro forma basis as if the incurrence of such
additional Indebtedness, and the application of the net proceeds therefrom, had
occurred at the beginning of the four-quarter period used to calculate the
Company's Consolidated Fixed Charge Coverage Ratio.

          (b) Notwithstanding the provisions of Section 5.04(a), the Company and
its Restricted Subsidiaries may: (i) incur Indebtedness under the Bank Credit
Agreement in an amount not to exceed $60,000,000; (ii) incur Indebtedness not
otherwise permitted by any other provision hereof, so long as the aggregate
principal amount of Indebtedness incurred under this clause (ii) does not exceed
7.5% of the Consolidated Tangible Assets of the Company; and (iii) incur
Refinancing Indebtedness. In addition, notwithstanding the provisions of Section
5.04(a): (A) Subsidiaries of the Company that are not Wholly Owned Restricted
Subsidiaries may incur Indebtedness to the Company or any of its Wholly Owned
Restricted Subsidiaries in the amounts and subject to the restrictions in
Section 5.05(iii) and (B) Single Purpose Subsidiaries of the Company may incur
Non-Recourse Indebtedness to the extent permitted by Section 5.05(iv).

          (c) Notwithstanding the provisions of Sections 5.04(a) and 5.04(b),
the Company may not incur any Indebtedness if such Indebtedness is subordinate
or junior in ranking in any respect to any Senior Indebtedness unless such
Indebtedness is Junior Subordinated Indebtedness. In addition, the Company may
not incur any secured Indebtedness which is not Senior Indebtedness unless
contemporaneously therewith effective provision is made to secure the Notes
equally and ratably with such secured Indebtedness for so long as such secured
Indebtedness is secured by a Lien.

Section 5.05  Limitations on Subsidiary Debt and  Preferred Stock

 
          After the date hereof, the Company will not permit any of its
Restricted Subsidiaries, directly or indirectly, to create, incur, assume,
guarantee, extend the maturity of or otherwise become liable with respect to
(collectively, "incur"), any Indebtedness (which, with respect to any Restricted
Subsidiary, includes without limitation preferred stock of such Restricted
Subsidiary) except: (i) guarantees by any Restricted Subsidiary of the payment
of the principal of, premium, if any, and interest on the Indebtedness incurred
pursuant to the Bank Credit Agreement and in compliance with the provisions of
Section 5.04(b)(i) and with the provisions of Section 5.11; (ii) Indebtedness
issued to and held by the Company or a Wholly Owned Restricted Subsidiary of the
Company (provided, however, that any subsequent issue or transfer of any Capital
Stock that results in any such Wholly Owned Restricted Subsidiary ceasing to be
a Wholly Owned Restricted Subsidiary or any transfer of such Indebtedness (other
than to a Wholly Owned Restricted Subsidiary) shall be deemed, in each case, to
constitute the incurrence of such Indebtedness by such Restricted Subsidiary);
(iii) Indebtedness to the Company or any of its Wholly Owned Restricted
Subsidiaries incurred by Subsidiaries of the Company that are not Wholly Owned
Restricted Subsidiaries that are engaged in Permitted Businesses in an aggregate
amount (together with all Designated Investments made in Subsidiaries that are
not Wholly Owned Restricted Subsidiaries in compliance with the provisions of
Section 5.06(b)(E)) not to exceed 5% of Consolidated Tangible Assets; and (iv)
Non-Recourse Indebtedness incurred by a Single Purpose Subsidiary.

Section 5.06  Limitations on Restricted Payments

          (a) The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, make any Restricted Payment if at the
time of such Restricted Payment:

          (i)   a Default or Event of Default shall have occurred and be
continuing or shall occur as a consequence thereof;

          (ii)  the Company would be unable to incur an additional $1.00 of
Senior Indebtedness under the provisions of Section 5.04(a); or

          (iii) the amount of such Restricted Payment, when added to the
aggregate amount of all Restricted Payments (other than those made pursuant to
the provisions of clause (A), (C), (D), (E) or (G) of Section 5.06(b)) made
after the date of this Indenture, exceeds the sum of: (a) 50% of the Company's
Consolidated Net Income accrued during the period from the date of this
Indenture to the end of the Company's most recently ended fiscal quarter for
which financial results have been reported at the time of such Restricted
Payment (or, if such aggregate Consolidated Net Income shall be a deficit, minus
100% of such aggregate deficit); plus (b) the aggregate amount of Net Reductions
in Investments attributable to Designated Investments made by the Company or any
Subsidiary subsequent to the date of this Indenture; provided, however, that (1)
the Net Reductions in Investments attributable to any Designated Investment for
purposes of this calculation shall not exceed the amount of such Designated
Investment, (2) to the extent that cash or Cash Equivalents included in any Net
Reductions in Investments pursuant to the definition thereof have been or will
be included in the computation of Consolidated Net Income for purposes of
determining the ability of the Company or any of its Restricted Subsidiaries to
make Restricted Payments under clause (iii)(a) of this Section 5.06(a), such
cash or Cash Equivalents shall not also be included in computing Net Reductions
in Investments for purposes of this clause (iii)(b) and (3) the Company will not
be permitted to make any Restricted Payment described in clause (i) or (ii) of
the definition of Restricted Payment from any Net Reductions in Investments.

          (b) Notwithstanding the foregoing, the provisions of clauses (ii) and
(iii) of Section 5.06(a) will not prevent:

          (A) the Company or any Wholly Owned Restricted Subsidiary from making
Investments in Subsidiaries, in an aggregate amount not to exceed $4,000,000,
pursuant to contractual obligations in existence on the date of this Indenture
or directly related to projects in existence on the date of this Indenture;

          (B) the Company from paying any dividend within 60 days after the date
of its declaration if such dividend could have been paid on the date of its
declaration without violation of this covenant;

 
          (C) the Company from purchasing or redeeming and retiring any shares
of Capital Stock of the Company, and paying accrued and unpaid dividends on such
shares at the time of such repurchase or redemption, in exchange for, or out of
the net proceeds of a substantially concurrent sale (other than to a Subsidiary
of the Company or an employee stock ownership plan) of, shares of Qualified
Capital Stock of the Company;

          (D) the Company or any Subsidiary from making (1) Investments pursuant
to the provisions of employee benefit plans of the Company or any of its
Subsidiaries in an aggregate amount not to exceed $500,000 in any fiscal year,
or (2) making loans to officers of the Company in connection with any relocation
of residence, approved by a majority of the independent members of the Board of
Directors of the Company, provided that the aggregate amount of Investments and
loans under this clause (D) shall not exceed $1,000,000 in any fiscal year;

          (E) the Company or any Wholly Owned Restricted Subsidiary from making
Designated Investments (1) in Subsidiaries that are not Wholly Owned Restricted
Subsidiaries in an aggregate amount (together with Indebtedness incurred by or
on behalf of Subsidiaries that  are not Wholly Owned Restricted Subsidiaries in
compliance with the provisions of Section 5.05(iii)) not to exceed 5% of
Consolidated Tangible Assets or (2) in Joint Ventures in an aggregate amount not
to exceed 5% of Consolidated Tangible Assets, provided that:  (x) the Person in
whom the Investment is made is engaged only in Permitted Businesses; (y) the
Company, directly or through Wholly Owned Restricted Subsidiaries of the
Company, controls, under an operating and management agreement or otherwise, the
day to day management and operation of such Person or otherwise has the right to
exercise significant influence over the management and operation of such Person
in all material respects (including without limitation the right to control or
veto any material act or decision); and (z) after giving effect to such
Investment, the aggregate amount of Indebtedness and Investments made by the
Company and its Subsidiaries in such Person does not exceed $5,000,000;

          (F) the Company or any Wholly Owned Restricted Subsidiary from making
Designated Investments in Subsidiaries that are not Wholly Owned Restricted
Subsidiaries or in Joint Ventures; provided that such Designated Investments are
made solely from (1) the net proceeds of a substantially concurrent sale (other
than to a Subsidiary of the Company or an employee stock ownership plan) of
shares of Qualified Capital Stock of the Company, (2) 50% of the Company's
Consolidated Net Income accrued during the period from the date of this
Indenture to the end of the Company's most recently ended fiscal quarter for
which financial results have been reported at the time of such Restricted
Payment or (3) the aggregate amount of Net Reductions in Investments (not to
exceed the aggregate amount of such Designated Investments) made by the Company
or any Subsidiary subsequent to the date of this Indenture;

          (G) the Company from redeeming for cash all (but not less than all) of
the outstanding shares of the Company's Series 2D Senior Preferred Stock;
provided, however, that such redemption shall not be at a price in excess of the
redemption price set forth in Section 17.01 of the Company's Amended and
Restated Certificate of Incorporation in effect as of the date of this
Indenture; and provided, further, that prior to January 13, 1997, the Company
shall not redeem any of the outstanding shares of the Company's Series 2D Senior
Preferred Stock until the Company delivers to the Trustee an Officer's
Certificate certifying that the Company's earnings before interest and taxes for
the most recent twelve (12) month period calculated in accordance with generally
accepted accounting principles equalled or exceeded $27 million. Nothing
contained in this further proviso shall affect the Company's right to redeem the
Series 2D Senior Preferred Stock no later than January 13, 1997; or

          (H) the Company from (1) making all regular quarterly dividends, each
such quarterly dividend payment not to exceed $487,500 in the aggregate of
$2,437.50 per share, on the outstanding shares of the Company's Series 2D Senior
Preferred Stock; and (2) making all payments of any dividends of up to 9.75% on
the aggregate unpaid amount of any regular quarterly dividend on the outstanding
shares of the Company's Series 2D Senior Preferred Stock from the date such
regular quarterly dividend should have been paid to the date of the payment of
such dividend; in consideration thereof, and except as provided below, the
               ------------------------------------------------------
Company shall increase the Interest payable on the Notes by one percent (1%)
(the "Additional Interest") from the date of this Indenture, such Additional
Interest payable as provided for in the Notes. The Company files its financial
results with the Securities and Exchange Commission on quarterly and annual
reports, and these reports include the Company's earnings after deducting
minority interests and before interest, taxes, depreciation, and amortization
calculated in accordance with generally accepted accounting principles
("Earnings"). The Company will measure its Earnings for trailing twelve month
periods, each period to end on the last day of a fiscal quarter and extend no
further than March 31, 1998 (each a "Quarterly Measurement Period").  

 
If the Company's Earnings equal or exceed $36 million for two consecutive
Quarterly Measurement Periods, then the Company is relieved of its obligation to
pay any future Additional Interest. However, if the Company's Earnings do not
equal or exceed $36 million for any subsequent Quarterly Measurement Period, up
to and including the Quarterly Measurement Period ending March 31, 1998, the
Company is obligated to commence paying Additional Interest until the Company's
Earnings again equal or exceed $36 million on a trailing twelve month basis
calculated quarterly.

Section 5.07  Limitations on Restrictions on Distributions from Subsidiaries

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, create or otherwise cause or suffer to exist or become
effective any consensual Payment Restriction with respect to any of its
Restricted Subsidiaries, except for (i) Payment Restrictions covering not more
than $1,000,000 in the aggregate of retained earnings of ICF Kaiser Servicios
Ambientales, S.A. de C.V., (ii) any such Payment Restriction contained in
Existing Indebtedness or existing contracts to which the Company or any of its
Restricted Subsidiaries are parties, (iii) any such Payment Restriction under
any agreement evidencing any Acquired Indebtedness that was permitted to be
incurred pursuant to the provisions of this Indenture, provided that such
Payment Restriction only applies to assets that were subject to such
restrictions and encumbrances prior to the acquisition of such assets by the
Company or its Restricted Subsidiaries and (iv) any such Payment Restriction
arising in connection with Refinancing Indebtedness; provided that any such
Payment Restrictions that arise under such Refinancing Indebtedness are not,
taken as a whole, more restrictive than those under the agreement creating or
evidencing the Indebtedness being refunded or refinanced.

Section 5.08  Limitations on Transactions With Affiliates

          (a) The Company will not, and will not permit any of its Restricted
Subsidiaries to, make any loan, advance, guarantee or capital contribution to or
for the benefit of, or sell, lease, transfer or otherwise dispose of any of its
properties or assets to or for the benefit of, or make any Investment in, or
purchase or lease any property or assets from, or enter into or amend any
contract, agreement or understanding with or for the benefit of, any Affiliate
of the Company or any of its Subsidiaries (each an "Affiliate Transaction"),
other than Affiliate Transactions in the ordinary course of business and
consistent with past practice that are fair to the Company or such Restricted
Subsidiary, as the case may be, and are on terms at least as favorable as would
have been obtainable at such time from an unaffiliated party, unless the Board
of Directors of the Company or such Restricted Subsidiary, as the case may be,
pursuant to a Board Resolution reasonably and in good faith determines that such
Affiliate Transaction is fair to the Company or such Restricted Subsidiary, as
the case may be, and is on terms at least as favorable as would have been
obtainable at such time from an unaffiliated party.

          (b) In addition, the Company will not, and will not permit any of its
Restricted Subsidiaries to, enter into any Affiliate Transaction or series of
Affiliate Transactions involving or having a value of more than (i) $1,000,000
unless a majority of the members of the Board of Directors of the Company who
are not affiliated with any other party to such Affiliate Transaction reasonably
and in good faith shall have determined that such Affiliate Transaction or
series of Affiliate Transactions is fair to the Company or such Restricted
Subsidiary, as the case may be, and is on terms at least as favorable as would
have been obtainable at such time from an unaffiliated party and (ii) $5,000,000
unless the Company or such Restricted Subsidiary, as the case may be, has
received an opinion from an Independent Financial Advisor to the effect that the
financial terms of such Affiliate Transaction are fair to the Company or such
Restricted Subsidiary, as the case may be, from a financial point of view.

          (c) The provisions of Sections 5.08(a) and 5.08(b) shall not apply to:
(i) transactions exclusively between or among the Company and any of its Wholly
Owned Restricted Subsidiaries or exclusively between or among any of the
Company's Wholly Owned Restricted Subsidiaries, provided that such transactions
are not otherwise prohibited by the Indenture; (ii) arms-length transactions
between the Company or any of its Wholly Owned Restricted Subsidiaries and the
other owners of any Subsidiary or Joint Venture described in the last sentence
of the definition of Affiliate; and (iii) reasonable compensation,
indemnification and other benefits paid or made available to officers, directors
and employees of the Company or any Subsidiary for services rendered in such
Person's capacity as an officer, director or employee.

Section 5.09  Limitations on Asset Sales

 
          (a) The Company will not, and will not permit any of its Restricted
Subsidiaries to, consummate any Asset Sale unless:  (i) the Company or its
Restricted Subsidiaries receive consideration at the time of such Asset Sale at
least equal to the fair market value of the assets or Capital Stock included in
such Asset Sale; (ii) the aggregate fair market value of the consideration from
such Asset Sale (other than consideration in the form of assumption of
Indebtedness of the Company or one or more of its Restricted Subsidiaries from
which the Company or such Restricted Subsidiaries, as the case may be, are
released) that is not in the form of cash or Cash Equivalents shall not, when
aggregated with the fair market value of all other non-cash or non-Cash
Equivalent consideration received by the Company and its Restricted Subsidiaries
from all previous Asset Sales since the date of this Indenture that have not yet
been converted into cash or Cash Equivalents, exceed 5% of Consolidated Tangible
Assets of the Company at the time of such Asset Sale; and (iii) if the aggregate
fair market value of the assets or Capital Stock to be sold in such Asset Sale
exceeds $3,000,000, such Asset Sale has been approved by the Company's Board of
Directors.

          (b) Within six months after consummation of any such Asset Sale (the
Business Day closest to the end of such six-month period is referred to as the
"Asset Sale Offer Date"), the Company shall, or shall cause the applicable
Restricted Subsidiary to:  (i) reinvest the cash and Cash Equivalent portion of
the Net Proceeds of such Asset Sale in a manner that would constitute a Related
Business Investment; (ii) apply or cause to be applied the cash and Cash
Equivalent portion of the Net Proceeds of such Asset Sale to repay outstanding
Senior Indebtedness of the Company or any Restricted Subsidiary, provided,
however, that any such repayment of Indebtedness under any revolving credit
facility or similar agreement shall result in a permanent reduction in the
lending commitment relating thereto in an amount equal to the principal amount
so repaid; or (iii) apply or cause to be applied the cash and Cash Equivalent
portion of the Net Proceeds of such Asset Sale that is neither reinvested as
provided in clause (i) nor applied to the repayment of Senior Indebtedness as
provided in clause (ii), first to the purchase of Existing Notes tendered to the
                         -----                                                  
Company at a purchase price equal to 100% of the principal amount thereof, plus
accrued and unpaid interest, if any, thereon to the date of purchase, pursuant
to an offer to purchase made by the Company as set forth in Article 3 and
Section 5.09 of the Indenture for the Existing Notes and this Indenture (an
"Asset Sale Offer") and second to the purchase of Notes tendered to the Company
                        ------                                                 
at a purchase price equal to 100% of the principal thereof, plus accrued and
unpaid interest, if any, thereon to the date of purchase, pursuant to an Asset
Sale Offer; provided, however, that the Company may defer the Asset Sale Offer
until the amount subject thereto would be at least $5,000,000.

          (c) Notwithstanding the provisions of Sections 5.09(a) and 5.09(b):
(i) to the extent that any or all of the Net Proceeds of any Foreign Asset Sale
are prohibited or delayed by applicable local law from being repatriated to the
United States, the portion of such Net Proceeds so affected will not be required
to be applied in the manner set forth in this Section 5.09 but may be retained
by the applicable Foreign Subsidiary so long, but only so long, as the
applicable local law will not permit repatriation to the United States (the
Company hereby agreeing to cause the applicable Foreign Subsidiary promptly to
take all actions required by the applicable local law to permit such
repatriation) and, once such repatriation of any of such affected Net Proceeds
is permitted under the applicable local law, such repatriation will be
immediately effected and such repatriated Net Proceeds will be applied in the
manner set forth in this Section 5.09; and (ii) to the extent that the Board of
Directors has determined in good faith that repatriation of any or all of the
Net Proceeds of any Foreign Asset Sale would have a material adverse tax
consequence, the Net Proceeds so affected may be retained by the applicable
Foreign Subsidiary for so long as such material adverse tax consequence would
continue.

Section 5.10  Restrictions on Sale of Stock of Subsidiaries

          The Company may not sell or otherwise dispose of any of the Capital
Stock of any Restricted Subsidiary of the Company unless: (i) (a)(x) the Company
shall retain ownership of more than 50% of the Common Equity of such Restricted
Subsidiary or (y) all of the Capital Stock of such Restricted Subsidiary shall
be sold or otherwise disposed of, and (b) the Net Proceeds from any such sale or
disposition are applied in a manner consistent with the provisions of Section
5.09; or (ii) the Company elects to treat the amount of its remaining investment
in any such Restricted Subsidiary that has become a Joint Venture as a result of
such sale or other disposition as an Investment in such Joint Venture subject to
the provisions of Section 5.06.

 
Section 5.11  Limitations on Guarantees

          The Company will not permit any of its Restricted Subsidiaries to
guarantee any Indebtedness (other than (i) guarantees permitted under the
provisions of Section 5.05(i) and (ii) guarantees delivered pursuant to the Bank
Credit Agreement by Subsidiaries of the Company who have delivered similar
guarantees prior to the date of this Indenture) unless the Company causes each
such Subsidiary to execute and deliver to the Trustee, prior to or concurrently
with the issuance of such guarantee, a supplemental indenture, in form
satisfactory to the Trustee, pursuant to which such Subsidiary unconditionally
guarantees the payment of principal of, premium, if any, and interest on the
Notes. Any such guarantee shall be substantially in the form of Exhibit G to
this Indenture, which is hereby incorporated in and expressly made a part of
this Indenture.

Section 5.12  SEC Reports

          (a) At any time that the Company has a class of securities registered
under the Exchange Act, the Company shall file with the Trustee and provide to
Holders, within 15 days after it files the same with the SEC, copies of its
annual reports and of the information, documents and other reports (or copies of
such portions of any of the foregoing as the SEC may by rules and regulations
prescribe) which the Company or any Subsidiary of the Company is required to
file with the SEC pursuant to Section 12, 13 or 15(d) of the Exchange Act. The
Company shall cause any annual report furnished to its stockholders generally
and any quarterly or other financial reports furnished by it to its stockholders
generally to be filed with the Trustee and mailed to the Holders at their
addresses appearing in the register of Notes maintained by the Registrar.

          (b) At any time that the Company does not have a class of securities
registered under the Exchange Act, the Company shall furnish to the Trustee (who
is hereby authorized and directed to furnish a copy thereof to any Person
requesting the same in writing) and shall mail (or cause to be mailed by the
Trustee at the Company's expense) to each of the Holders at their addresses as
set forth in the register of Notes maintained by the Registrar within 60 days
after the close of each of the first three quarters of each fiscal year and
within 105 days after the close of each fiscal year consolidated balance sheets
of the Company as of the end of each such quarter or fiscal year, as the case
may be, and consolidated statements of income and cash flow of the Company for
the period commencing at the end of the Company's previous fiscal year and
ending with the end of such quarter or fiscal year, as the case may be, all such
financial statements setting forth in comparative form the corresponding figures
for the corresponding period of the preceding fiscal year, all in reasonable
detail and duly certified (subject to year-end adjustments) by an Officer of the
Company as having been prepared in accordance with GAAP consistently applied,
and, in the case of annual consolidated financial statements, certified by
independent public accountants of established national reputation, and a
discussion and analysis of the results of operations and financial condition of
the Company and its subsidiaries for the periods presented, which discussion and
analysis shall be prepared by the management of the Company in a manner
responsive to the requirements of Item 303 (or any successor item or section) of
Regulation S-K promulgated by the SEC.  All financial statements shall be
prepared in accordance with GAAP consistently applied, except for changes with
which the Company's independent public accountants concur and except that
quarterly statements may be subject to year-end adjustments.

          (c) Delivery of the above-referenced reports, information and
documents to the Trustee is for informational purposes only and the Trustee's
receipt of such shall not constitute constructive notice of any information
contained therein or determinable from information contained therein, including
the Company's compliance with any of its covenants hereunder (as to which the
Trustee is entitled to rely exclusively on Officers' Certificates).

Section 5.13  Corporate Existence

          Subject to the provisions of Sections 5.09 and 6.01, the Company
shall, and shall cause each Restricted Subsidiary to, do or cause to be done all
things necessary to preserve and keep in full force and effect its rights
(charter and statutory), licenses and franchises, except in such cases where a
failure to do so would not have a material adverse effect on (a) the business,
prospects, assets or financial condition of the Company and its Restricted
Subsidiaries taken as a whole, or (b) the Holders.

 
Section 5.14  Stay, Extension and Usury Laws

          The Company covenants (to the extent that it may lawfully do so) that
it will not at any time insist upon, plead or in any manner whatsoever claim or
take the benefit or advantage of any stay, extension or usury law wherever
enacted, now or at any time hereafter in force, that may affect the Company's
obligation to pay the Notes; and the Company (to the extent that it may lawfully
do so) hereby expressly waives all benefit or advantage of any such law insofar
as such law applies to the Notes, and covenants that it will not, by resort to
any such law, 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 has been enacted.

Section 5.15  Insurance; Books and Records; Compliance with Law

          (a) The Company will and will cause each Subsidiary to maintain
insurance with financially sound and responsible insurance companies on all its
property in at least such amounts and against at least such risks (but including
in any event public liability, product liability and business interruption) as
are usually insured against in the same general area by companies engaged in the
same or a similar business.

         (b)  The Company will and will cause each Subsidiary to keep proper
books of record and account in which full and correct entries shall be made of
all financial transactions and the assets and business of the Company and each
Subsidiary, in accordance with GAAP consistently applied to the Company and its
Subsidiaries taken as a whole.

         (c)  The Company will and will cause each Subsidiary to comply with all
statutes, laws, ordinances or government rules and regulations to which it is
subject, non-compliance with which would materially adversely affect the
business, prospects, earnings, properties, assets or condition (financial or
otherwise) of the Company and its Subsidiaries taken as a whole.

Section 5.16  Inspection and Confidentiality

         (a)  The Company shall, and shall cause each of its Subsidiaries to,
permit authorized representatives of the Trustee to visit and inspect the
properties of the Company or its Subsidiaries, all upon reasonable prior notice
and at such reasonable times during normal business hours and as often as may be
reasonably requested.

         (b)  The Trustee and its authorized representatives referred to in
Section 5.16(a) agree not to use any information obtained pursuant to this
Section 5.16 for any unlawful purpose and to keep confidential and not to
disclose any such information to any Person except that (i) the recipient of the
information may disclose any information that becomes publicly available other
than as a result of disclosure by such recipient, (ii) the recipient of the
information may disclose any information that its counsel reasonably concludes
is necessary to be disclosed by law, pursuant to any court or administrative
order or ruling or in any pending legal or administrative proceeding or
investigation after prior written notice, reasonable under the circumstances, to
the Company and (iii) the recipient of the information may disclose any
information necessary to be disclosed pursuant to any provision of the TIA.

Section 5.17  Compliance Certificate

         (a)  The Company shall deliver to the Trustee, within 105 days after
the end of each fiscal year of the Company, an Officers' Certificate stating
that a review of the activities of the Company and its Restricted Subsidiaries
during the preceding fiscal year has been made under the supervision of the
signing Officers with a view to determining whether the Company has kept,
observed, performed and fulfilled its obligations under this Indenture, and
further stating, as to each such Officer signing such Officers' Certificate,
that to the best of such Officer's knowledge the Company has kept, observed,
performed and fulfilled each covenant contained in this Indenture and is not in
default in the performance or observance of any of the terms, provisions and
conditions hereof (or, if a Default or Event of Default shall have occurred,
describing all such Defaults or Events of Default of which such Officer may have
knowledge and what action the Company is taking or proposes to take with respect
thereto) and that to the best of such Officer's knowledge no event has occurred
and remains in existence by reason of which payments on account of the

 
principal of, premium, if any, or interest on the Notes are prohibited or, if
such event has occurred, a description of the event and what action the Company
is taking or proposes to take with respect thereto. Such compliance shall be
determined without regard to periods of grace or requirements of notice.

         (b)  So long as not contrary to the then current recommendations of the
American Institute of Certified Public Accountants, the year-end financial
statements delivered pursuant to Section 5.12 shall be accompanied by a written
statement of the Company's independent public accountants (who shall be a firm
of established national reputation) that in making the examination necessary for
certification of such financial statements nothing has come to their attention
that would lead them to believe that the Company has violated any provisions of
Article 5 or 6 or, if any such violation has occurred, specifying the nature and
period of existence thereof, it being understood that such accountants shall not
be liable directly or indirectly to any Person for any failure to obtain
knowledge of any such violation.

         (c)  The Company, so long as any of the Notes are outstanding, will
deliver to the Trustee, within five Business Days of any Officer becoming aware
of any Default or Event of Default under this Indenture, an Officers'
Certificate specifying such Default or Event of Default and what action the
Company is taking or proposes to take with respect thereto.

                                   ARTICLE 6
                                  SUCCESSORS

Section 6.01  Limitations on Mergers and Consolidations

         (a)  The Company, in a single transaction or a series of related
transactions, will not (i) consolidate or merge with or into, or sell, lease,
convey or otherwise dispose of all or substantially all of its assets, or assign
any of its obligations under the Notes or this Indenture, to any Person or (ii)
adopt a Plan of Liquidation unless, in either case:

         (A)  the Person formed by or surviving such consolidation or merger (if
other than the Company) or to which such sale, lease, conveyance or other
disposition or assignment shall be made (or, in the case of a Plan of
Liquidation, one Person to which assets are transferred) (collectively, the
"Successor"), is a corporation organized and existing under the laws of the
United States or any State thereof or the District of Columbia, and the
Successor assumes by supplemental indenture in a form satisfactory to the
Trustee all of the obligations of the Company under the Notes and this
Indenture;

         (B)  immediately prior to and immediately after and giving effect to
such transaction and the assumption of the obligations as set forth in clause
(A) above and the incurrence of any Indebtedness to be incurred in connection
therewith, no Default or Event of Default shall have occurred and be continuing;
and

         (C)  immediately after and giving effect to such transaction and the
assumption of the obligations as set forth in clause (A) above and the
incurrence of any Indebtedness to be incurred in connection therewith, and the
use of any net proceeds therefrom on a pro forma basis, (1) the Consolidated
Tangible Net Worth of the Company or the Successor, as the case may be, would be
at least equal to the Consolidated Tangible Net Worth of the Company immediately
prior to such transaction and (2) the Company or the Successor, as the case may
be, could incur at least $1.00 of additional Senior Indebtedness under the
provisions of Section 5.04.

         (b)  In addition, the Company will not permit any Single Purpose
Subsidiary that has outstanding Indebtedness to consolidate or merge with any
other Person other than a Person the activities of which are limited to
ownership of a portion of the same project in which the referent Single Purpose
Subsidiary owns an interest.

         (c)  The provisions of Sections 6.01(a) and 6.01(b) will not prohibit a
transaction the sole purpose of which (as determined in good faith by the Board
of Directors of the Company and evidenced by a Board Resolution) is to change
the state of incorporation of the Company or a Single Purpose Subsidiary, as the
case may be, and such transaction does not have as one of its purposes the
evasion of the limitations described above.

Section 6.02  Successor Corporation Substituted

 
           (a) Upon any consolidation or merger, or any sale, lease, conveyance
or other disposition of all or substantially all of the assets of the Company or
any assignment of its obligations under this Indenture or the Notes in
accordance with Section 6.01, the Successor formed by such consolidation or into
or with which the Company is merged or to which such sale, lease, conveyance or
other disposition or assignment is made 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 had been named as the Company herein.

           (b) Subject to the provisions of Section 5.03(a), in the event of any
such sale, lease, conveyance or other disposition (other than a transfer by way
of lease), the Company or any Successor which theretofore shall have been
substituted for the Company pursuant to the provisions of this Article 6 shall
be discharged from all obligations and covenants under this Indenture and the
Notes and may, but need not be, liquidated and dissolved.

                                   ARTICLE 7

                             DEFAULTS AND REMEDIES

Section 7.01   Events of Default

           An "Event of Default" occurs if:

           (1) the Company fails to pay interest on any of the Notes when it
becomes due and payable and such failure continues for 30 days;

           (2) the Company fails to pay the principal or premium, if any, of the
Notes when it becomes due and payable, whether at stated maturity, upon
redemption, upon acceleration or otherwise (including failure to make payment
pursuant to a Change in Control Offer or an Asset Sale Offer);

           (3) the Company fails to comply with any covenant in this Indenture
and such failure continues for 60 days after notice of such failure has been
given to the Company by the Trustee or by the Holders of at least 25% of the
aggregate principal amount of the Notes then outstanding;

           (4) the Company or any of its Subsidiaries fail to make any payment
when due or during any applicable grace period in respect of any Indebtedness of
the Company or any of its Subsidiaries, other than Non-Recourse Indebtedness of
a Single Purpose Subsidiary, that has an aggregate outstanding principal amount
of $2,000,000 or more;

           (5) the Company defaults under any Indebtedness, other than
Non-Recourse Indebtedness of a Single Purpose Subsidiary, whether such
Indebtedness existed on the date of this Indenture or thereafter shall be
created, if (A) such default results in the holder or holders of such
Indebtedness causing such Indebtedness to become due prior to its stated
maturity and (B) the principal amount of such Indebtedness, together with the
principal amount of any other such Indebtedness the maturity of which has been
so accelerated, aggregate $2,000,000 or more at any one time outstanding;

           (6) one or more final judgments or orders that exceed $2,000,000 in
the aggregate for the payment of money have been entered by a court or courts of
competent jurisdiction against the Company or any of its Subsidiaries and such
judgment or judgments have not been satisfied, stayed, annulled or rescinded
within 60 days of being entered;

           (7) the Company or any of its Subsidiaries pursuant to or within the
meaning of any Bankruptcy Law:

(a)        commences a voluntary case,

(b)        consents to the entry of an order for relief against it in an
involuntary case,

(c)        consents to the appointment of a Custodian of it or for all or
substantially all of its property, or


 
(d)        makes a general assignment for the benefit of its creditors; or

(8)        a court of competent jurisdiction enters an order or decree under any
Bankruptcy Law that:

           (a) is for relief against the Company or any of its
Subsidiaries as debtor in an involuntary case,

           (b) appoints a Custodian of the Company or any of its
Subsidiaries or a Custodian for all or substantially all of the property of the
Company or any of its Subsidiaries, or

           (c) orders the liquidation of the Company or any of its Subsidiaries,
and the order or decree remains unstayed and in effect for 60 days.

Section 7.02   Acceleration

           If an Event of Default (other than an Event of Default with respect
to the Company specified in clause (7) or (8) of Section 7.01) occurs and is
continuing, the Trustee by written notice to the Company, or the Holders of at
least 25% in aggregate principal amount of the Notes then outstanding by notice
to the Company and the Trustee, may declare all amounts owing under the Notes to
be due and payable immediately for an amount equal to 100% of the principal
amount of the Notes plus accrued and unpaid interest, if any, to date of
payment. Upon such declaration of acceleration, the aggregate principal of and
interest on the Notes shall immediately become due and payable. If an Event of
Default with respect to the Company specified in clause (7) or (8) of Section
7.01 occurs, such an amount shall ipso facto become and be immediately due and
payable without any declaration, notice or other act on the part of the Trustee
or any Holder. The Holders of a majority in aggregate principal amount of the
Notes then outstanding by written notice to the Trustee may rescind an
acceleration and its consequences if the rescission would not conflict with any
judgment or decree and if all existing Events of Default (except nonpayment of
principal or interest on the Notes that has become due solely as a result of
such acceleration) have been cured or waived.

Section 7.03   Other Remedies

           If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy by proceeding at law or in equity to collect the
payment of principal of, premium, if any, or interest on the Notes or to enforce
the performance of any provision of the Notes or this Indenture.

           The Trustee may maintain a proceeding even if it does not possess any
of the Notes or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. No remedy is exclusive of any
other remedy. All remedies are cumulative to the extent permitted by law.

Section 7.04   Waiver of Past Defaults

           Subject to the provisions of Section 7.07 and Section 10.02, the
Holders of a majority in principal amount of the then outstanding Notes by
notice to the Trustee may waive an existing Default or Event of Default and its
consequences, except a continuing Default or Event of Default specified in
clause (1), (2), (7) or (8) of Section 7.01 or in respect of the provisions of
Section 5.03 or any provision hereof that cannot be modified or amended without
the consent of the Holder so affected pursuant to Section 10.02. 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 7.05   Control by Majority

           The Holders of a majority in principal amount of the then outstanding
Notes may 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
it. However, the Trustee may refuse to follow any direction that conflicts with
law or this Indenture, that the Trustee determines may be unduly prejudicial to
the rights of other Holders, or that may involve the Trustee in personal
liability.

Section 7.06   Limitations on Suits

           Except as provided in Section 7.07, a Holder may pursue a remedy with
respect to this Indenture or the Notes only if:

           (1) the Holder gives to the Trustee written notice of a
continuing Event of Default;

           (2) the Holders of at least 25% in principal amount of the then
outstanding Notes make a written request to the Trustee to pursue the remedy;

           (3) such Holder or Holders offer to the Trustee indemnity
satisfactory to the Trustee against any loss, liability or expense;

           (4) the Trustee does not comply with the request within 60 days
after receipt of the request and the offer of indemnity; and

           (5) during such 60-day period the Holders of a majority in principal
amount of the then outstanding Notes do not give the Trustee a direction
inconsistent with the request.

A Holder may not use this Indenture to prejudice the rights of another Holder or
to obtain a preference or priority over another Holder.

Section 7.07   Rights of Holders to Receive Payment

           Notwithstanding any other provision of this Indenture, the right of
any Holder of a Note to receive payment of principal of, premium, if any, and
interest on the Note, on or after the respective due dates expressed in the
Note, or to bring suit for the enforcement of any such payment on or after such
respective dates, is absolute and unconditional and shall not be impaired or
affected without the consent of the Holder.

Section 7.08   Collection Suit by Trustee

           If an Event of Default specified in Section 7.01(1) or (2) occurs and
is continuing, the Trustee is authorized to recover judgment in its own name and
as trustee of an express trust against the Company for the amount of principal,
premium, if any, and interest remaining unpaid on the Notes, determined in
accordance with Section 7.02, and interest on overdue principal and, to the
extent lawful, premium, if any, and interest, and 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.


 
Section 7.09   Trustee May File Proofs of Claim

           The Trustee is authorized to file such proofs of claim and other
papers or documents as may be necessary or advisable in order to have the claims
of the Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Holders allowed in any judicial proceedings relative to the Company, its
creditors or its property and shall be entitled and empowered to collect,
receive and distribute any money or other property payable or deliverable on any
such claims and any Custodian 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 to 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 8.06. Nothing
herein contained 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 Notes 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 7.10   Priorities

           If the Trustee collects any money pursuant to this Article 7, it
shall pay out the money in the following order:

           First:  to the Trustee for amounts due under Section 8.06;

           Second:  to Holders for amounts due and unpaid on the Notes for
interest, ratably, without preference or priority of any kind, according to the
amounts due and payable on the Notes for interest;

           Third:  to Holders for amounts due and unpaid on the Notes for
principal and premium, if any, ratably, without preference or priority of any
kind, according to the amounts due and payable on the Notes for principal and
premium, if any, respectively; and

           Fourth:  as a court of competent jurisdiction may direct.

           The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Section 7.10.

Section 7.11   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 or omitted by
it as Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section 7.11 does not apply to a suit by the Trustee, a suit by a Holder
pursuant to Section 7.07 or a suit by Holders of more than 10% in principal
amount of the then outstanding Notes.

Section 7.12   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 case, subject to any
determination in such proceeding, the Company, the Trustee and the Holder 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.

                                    ARTICLE 8
                                     TRUSTEE

Section 8.01   Duties of Trustee


 
           (1) 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 such exercise, as a
prudent man would exercise or use under the circumstances in the conduct of his
own affairs.

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

           (a) 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

           (b) 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.

           (3) 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:

           (a) this paragraph does not limit the effect of paragraph (2) of this
Section 8.01;

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

           (c) 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 7.05.

           (4) Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraphs
(1), (2) and (3) of this Section 8.01.

           (5) No provision of this Indenture shall require the Trustee to
expend or risk its own funds or incur any liability. The Trustee may refuse to
perform any duty or exercise any right or power unless it receives indemnity
satisfactory to it against any loss, liability or expense.

           (6) 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 8.02   Rights of Trustee

           Subject to the provisions of Section 8.01:

           (1) The Trustee may rely on any document believed by it to be genuine
and to have been signed or presented by the proper Person. The Trustee need not
investigate any fact or matter stated in the document.

           (2) Before the Trustee acts or refrains from acting, it may require
an Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not
be liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. The Trustee may consult with
counsel and an 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.

           (3) The Trustee may act through agents and shall not be responsible
for the misconduct or negligence of any agent (other than an agent who is an
employee of the Trustee) appointed with due care.


 
           (4) The Trustee shall not be liable for any action it takes or omits
to take in good faith which it believes to be authorized or within its rights or
powers conferred upon it by this Indenture.

           (5) Unless otherwise specifically provided in this Indenture, any
demand, request, direction or notice from the Company shall be sufficient if
signed by an Officer of the Company.

           (6) 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 may be incurred by it in compliance with such
request or direction.

Section 8.03   Individual Rights of Trustee

           The Trustee in its individual or any other capacity may become the
owner or pledgee of Notes and may otherwise deal with the Company or any of its
Affiliates with the same rights it would have if it were not Trustee. Any Agent
may do the same with like rights.

Section 8.04   Trustee's Disclaimer

           The Trustee makes no representation as to the validity or adequacy of
this Indenture or the Notes. It shall not be accountable for the Company's use
of the proceeds from the Notes or any money paid to the Company or upon the
Company's direction under any provision hereof. It shall not be responsible for
the use or application of any money received by any Paying Agent other than the
Trustee. It shall not be responsible for any statement or recital herein or any
statement in the Notes other than its certificate of authentication.

Section 8.05   Notice of Defaults

           If a Default or Event of Default occurs and is continuing and if it
is known to the Trustee, the Trustee shall mail to Holders, as their names and
addresses shall appear on the Notes register, a notice of the Default or Event
of Default within 60 days after it occurs. Except in the case of a Default or
Event of Default in payment of principal of, premium, if any, or interest on any
Note or that resulted from a failure to comply with Section 5.03, the Trustee
may withhold the notice if and so long as a committee of its Trust Officers in
good faith determines that withholding the notice is in the interests of
Holders.

Section 8.06   Compensation and Indemnity

           The Company shall pay to the Trustee such compensation as the Company
and the Trustee may from time to time agree upon in writing for its acceptance
of this Indenture and services hereunder. The Trustee's compensation shall not
be limited by any law on compensation of a trustee of an express trust. The
Company shall reimburse the Trustee upon request for all reasonable
disbursements, advances and expenses incurred by it. Such expenses shall include
the reasonable compensation, disbursements and expenses of the Trustee's agents
and counsel.

           The Company shall indemnify each of the Trustee and any predecessor
Trustee against any and all loss, damage, claim, liability or expense including
taxes (other than taxes based upon, measured by or determined by the income of
the Trustee), incurred by it arising out of or in connection with the acceptance
or administration of its duties under this Indenture, except as set forth in the
next paragraph. The Trustee promptly shall notify the Company of any claim for
which it may seek indemnity. The Company shall defend the claim and the Trustee
shall cooperate in the defense. The Trustee may have separate counsel and the
Company shall pay the reasonable fees and expenses of such counsel. The Company
need not pay for any settlement made without its consent, which consent shall
not be unreasonably withheld.

           The Company need not reimburse any expense or indemnify against any
loss or liability incurred by the Trustee through negligence or bad faith.


 
           To secure the Company's payment obligations in this Section 8.06, the
Trustee shall have a Lien prior to the Notes on all money or property held or
collected by the Trustee, except that held in trust to pay principal of,
premium, if any, and interest on particular Notes. Such Lien shall survive the
satisfaction and discharge of this Indenture.

           When the Trustee incurs expenses or renders services after an Event
of Default specified in Section 7.01(7) or (8) occurs, the expenses (including
the reasonable charges and expenses of its counsel) and the compensation for the
services are intended to constitute expenses of administration under any
Bankruptcy Law.

Section 8.07   Replacement of Trustee

           A resignation or removal of the Trustee and appointment of a
successor Trustee shall become effective only upon the successor Trustee's
acceptance of appointment as provided in this Section 8.07.

           The Trustee may resign and be discharged from the trust hereby
created by so notifying the Company. The Holders of a majority in principal
amount of the then outstanding Notes may remove the Trustee by so notifying the
Trustee and the Company. The Company may remove the Trustee if:

           (1) the Trustee fails to comply with Section 310(b) of the TIA;

           (2) the Trustee is adjudged a bankrupt or an insolvent or an order
for relief is entered with respect to the Trustee under any Bankruptcy Law;

           (3) a Custodian or public officer takes charge of the Trustee or its
property; or

           (4) the Trustee becomes incapable of acting.

           If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the Holders
of a majority in principal amount of the then outstanding Notes may appoint a
successor Trustee to replace the successor Trustee appointed by the Company.

           If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least 10% in principal amount of the then outstanding Notes may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

           If the Trustee fails to comply with Section 310 of the TIA, any
Holder may petition any court of competent jurisdiction for the removal of the
Trustee and the appointment of a successor Trustee.

           A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Thereupon the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders. The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, subject to the Lien provided for
in Section 8.06. Notwithstanding replacement of the Trustee pursuant to this
Section 8.07, the Company's obligations under Section 8.06 shall continue for
the benefit of the retiring Trustee.

Section 8.08   Successor Trustee by Merger, etc.

           Subject to Section 8.09, if the Trustee consolidates, merges or
converts into, or transfers all or substantially all of its corporate trust
business to, another corporation, the successor corporation without any further
act shall be the successor Trustee.

Section 8.09   Eligibility; Disqualification


 
           There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America, any State thereof or the District of Columbia, shall be authorized
under such laws to exercise corporate trust power, shall be subject to
supervision or examination by federal or state (or the District of Columbia)
authority and shall have a combined capital and surplus of at least $50,000,000
as set forth in its most recent published annual report of condition.

Section 8.10   Reports by Trustee to Holders

           To the extent required by TIA ss. 313(a), within 60 days after May 15
of each year commencing with 1997 and for as long as there are Notes outstanding
hereunder, the Trustee shall mail to each Holder the Company's brief report
dated as of such date that complies with TIA ss. 313(a). The Trustee also shall
comply with TIA ss. 313(b), (c) and (d). A copy of such report at the time of
its mailing to Holders shall be filed with the SEC, if required, and each stock
exchange, if any, on which the Notes are listed.

           The Company shall promptly notify the Trustee if the Notes become
listed on any national securities exchange and the Trustee shall comply with
Section 313(d) of the TIA.

                                   ARTICLE 9

                            DISCHARGE OF INDENTURE

Section 9.01   Termination of Company's Obligations

           This Indenture shall cease to be of further effect (except that the
Company's obligations under Section 8.06 and the Trustee's and Paying Agent's
obligations under Section 9.03 shall survive) when all outstanding Notes
theretofore authenticated and issued have been delivered (other than destroyed,
lost or stolen Notes that have been replaced or paid) to the Trustee for
cancellation and the Company has paid all sums payable hereunder. In addition,
the Company may terminate all of its obligations under this Indenture if:

           (1) the Company irrevocably deposits in trust with the Trustee or, at
the option of the Trustee, with a trustee satisfactory to the Trustee and the
Company under the terms of an irrevocable trust agreement in form and substance
satisfactory to the Trustee, money or U.S. Government Obligations sufficient to
pay principal of, premium, if any, and interest on the Notes to maturity and to
pay all other sums payable by it hereunder; provided that (i) the trustee of the
irrevocable trust shall have been irrevocably instructed to pay such money or
the proceeds of such U.S. Government Obligations to the Trustee and (ii) the
Trustee shall have been irrevocably instructed to apply such money or the
proceeds of such U.S. Government Obligations to the payment of said principal,
premium and interest with respect to the Notes;

           (2) the Company delivers to the Trustee an Officers' Certificate
stating that all conditions precedent to satisfaction and discharge of this
Indenture have been complied with, and an Opinion of Counsel to the same effect;

           (3) no Default or Event of Default shall have occurred and be
continuing on the date of such deposit; and

           (4) the Company shall have delivered to the Trustee an Opinion of
Counsel from nationally recognized counsel acceptable to the Trustee or a tax
ruling to the effect that the Holders of the Notes will not recognize income,
gain or loss for federal income tax purposes as a result of the Company's
exercise of its option under this Section 9.01 and will be subject to federal
income tax on the same amount and in the same manner and at the same times as
would have been the case if such option had not been exercised.

In such event, this Indenture shall cease to be of further effect (except as
provided in the next succeeding paragraph), and the Trustee, on demand of the
Company, shall execute proper instruments acknowledging confirmation of and
discharge under this Indenture.

           However, the Company's obligations in Sections 2.03, 2.04, 2.05,
2.06, 5.01, 5.02, 8.06 and 8.07 and the Company's, the Trustee's and Paying
Agent's obligations in Section 9.03 shall survive until the Notes are no longer


 
outstanding. Thereafter, only the Company's obligations in Section 8.06 and the
Trustee's and Paying Agent's obligations in Section 9.03 shall survive.

           After such irrevocable deposit made pursuant to this Section 9.01 and
satisfaction of the other conditions set forth herein, the Trustee upon request
shall acknowledge in writing the discharge of the Company's obligations under
this Indenture except for those surviving obligations specified above.

           In order to have money available on a payment date to pay principal
of, premium, if any, or interest on the Notes, the U.S. Government Obligations
shall be payable as to principal or interest on or before such payment date in
such amounts as will provide the necessary money. U.S. Government Obligations
shall not be callable at the issuer's option.

Section 9.02   Application of Trust Money

           The Trustee or a trustee satisfactory to the Trustee and the Company
shall hold in trust money or U.S. Government Obligations deposited with it
pursuant to Section 9.01. It shall apply the deposited money and the money from
U.S. Government Obligations through the Paying Agent and in accordance with this
Indenture to the payment of principal of, premium, if any, and interest on the
Notes.

Section 9.03   Repayment to Company

           The Trustee and the Paying Agent shall promptly pay to the Company
upon written request any excess money or securities held by them at any time.

           The Trustee and the Paying Agent shall pay to the Company upon
written request any money held by them for the payment of principal, premium, if
any, or interest that remains unclaimed for two years after the date upon which
such payment shall have become due; provided, however, that the Company shall
have either caused notice of such payment to be mailed to each Holder entitled
thereto no less than 30 days prior to such repayment or within such period shall
have published such notice in a financial newspaper of general circulation
published in The City of New York. After payment to the Company, Holders
entitled to the money must look to the Company for payment as general creditors
unless an applicable abandoned property law designates another Person, and all
liability of the Trustee and such Paying Agent with respect to such money shall
cease.

Section 9.04   Reinstatement

           If the Trustee or Paying Agent is unable to apply any money or U.S.
Government Obligations in accordance with Section 9.01 by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application, the
Company's obligations under this Indenture and the Notes shall be revived and
reinstated as though no deposit had occurred pursuant to Section 9.01 until such
time as the Trustee or Paying Agent is permitted to apply all such money or U.S.
Government Obligations in accordance with Section 9.01; provided, however, that
if the Company has made any payment of principal of, premium, if any, or
interest on any Notes because of the reinstatement of its obligations, the
Company shall be subrogated to the rights of the Holders of such Notes to
receive such payment from the money or U.S. Government Obligations held by the
Trustee or Paying Agent.

                                  ARTICLE 10
                                  AMENDMENTS

Section 10.01  Without Consent of Holders

           The Company and the Trustee may amend this Indenture or the Notes or
waive any provision hereof without the consent of any Holder:

           (1) to cure any ambiguity, defect or inconsistency;


 
           (2) to comply with Section 6.01;
           (3) to provide for uncertificated Notes in addition to certificated
Notes;
           (4) to make any change that does not adversely affect the legal
rights hereunder of any Holder; 
           (5) to surrender any right or power herein conferred upon the
Company;           
           (6) to modify, eliminate or add to the provisions of this Indenture
to such extent as shall be necessary to effect the qualification of the
Indenture under the TIA, or under any similar federal statute hereafter enacted;
or           
           (7) to add or release any Guarantor pursuant to the terms of this
Indenture or the Guarantees.

           Upon the request of the Company, accompanied by a resolution of the
Board of Directors authorizing the execution of any such supplemental indenture,
and upon receipt by the Trustee of the documents described in Section 10.06, the
Trustee shall join with the Company in the execution of any supplemental
indenture authorized or permitted by the terms of this Indenture and make any
further appropriate agreements and stipulations that may be therein contained,
but the Trustee shall not be obligated to enter into any supplemental indenture
that affects its own rights, duties or immunities under this Indenture or
otherwise. After an amendment or waiver under this Section 10.01 becomes
effective, the Company shall mail to the Holders of each Note affected thereby a
notice briefly describing the amendment or waiver. Any failure of the Company to
mail such notice, or any defect therein, shall not, however, in any way impair
or affect the validity of any such supplemental indenture.

Section 10.02  With Consent of Holders

           Except as provided in this Section 10.02, the Company and the Trustee
may amend this Indenture or the Notes with the written consent (including
consents obtained in connection with a tender offer or exchange offer for Notes)
of the Holders of at least a majority in principal amount of the then
outstanding Notes.

           Upon the request of the Company, accompanied by a resolution of the
Board of Directors of the Company authorizing the execution of any such
supplemental indenture, and upon the filing with the Trustee of evidence of the
consent of the Holders as aforesaid, and upon receipt by the Trustee of the
documents described in Section 10.06, the Trustee shall join with the Company in
the execution of such supplemental indenture unless such supplemental indenture
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise, in which case the Trustee may in its discretion, but shall not be
obligated to, enter into such supplemental indenture.

           It shall not be necessary for the consent of the Holders under this
Section 10.02 to approve the particular form of any proposed amendment or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

           The Holders of a majority in principal amount of the Notes then
outstanding may waive compliance in a particular instance by the Company with
any provision of this Indenture or the Notes (including waivers obtained in
connection with a tender offer or exchange offer for Notes). However, without
the consent of each Holder affected, an amendment or waiver under this Section
10.02 may not:

           (1) reduce the amount of Notes whose Holders must consent to an
amendment, supplement or waiver; 
           (2) reduce the rate of or change the time for payment of interest,
including default interest, on any Note ; 
           (3) reduce the principal of or change the fixed maturity of any Note
or alter the provisions with respect to optional redemption or mandatory
repurchase of the Notes under this Indenture, including without limitation
purchases of Notes under Section 3.04;
           (4) make any Note payable in money other than that stated in the
Note;
           (5) make any change in Section 5.03, 7.04 or 7.07 or in this
paragraph of this Section 10.02; or 
           (6) waive a continuing Default or Event of Default in the payment of
principal of or interest on the Notes or that resulted from a failure to comply
with Section 5.03.

           The right of any Holder to participate in any consent required or
sought pursuant to any provision of this Indenture (and the obligation of the
Company to obtain any such consent otherwise required from such Holder) may be
subject to the requirement that such Holder shall have been the Holder of record
of any Notes with respect to which such consent is required or sought as of a
date identified by the Trustee or the Company in a notice furnished to Holders
in accordance with the terms of this Indenture.


 
Section 10.03  Compliance with Trust Indenture Act

           Every amendment to this Indenture or the Notes shall comply in form
and substance with the TIA as then in effect.

Section 10.04  Revocation and Effect of Consents

           Until an amendment (which includes any supplement) or waiver becomes
effective, a consent to it by a Holder of a Note is a continuing consent by the
Holder and every subsequent Holder of a Note or portion of a Note that evidences
the same debt as the consenting Holder's Note, even if notation of the consent
is not made on any Note. However, any such Holder or subsequent Holder may
revoke the consent as to his or her Note or portion of a Note if the Trustee
receives written notice of revocation before the date the amendment or waiver
becomes effective. An amendment or waiver becomes effective in accordance with
its terms and thereafter binds every Holder.

           The Company may, but shall not be obligated to, fix a record date for
the purpose of determining the Holders entitled to consent to any amendment or
waiver. If the Company elects to fix a record date for such purpose, the record
date shall be fixed at (i) the later of 30 days prior to the first solicitation
of such consent or the date of the most recent list of Holders furnished to the
Trustee prior to such solicitation, or (ii) such other date as the Company shall
designate. If a record date is fixed, then notwithstanding the provisions of the
immediately preceding paragraph, those Persons who were Holders at such record
date (or their duly designated proxies), and only those Persons, shall be
entitled to consent to such amendment or waiver or to revoke any consent
previously given, whether or not such Persons continue to be Holders after such
record date. No consent shall be valid or effective for more than 90 days after
such record date unless consents from Holders of the principal amount of Notes
required hereunder for such amendment or waiver to be effective shall have also
been given and not revoked within such 90-day period.

           After an amendment or waiver becomes effective it shall bind every
Holder, unless it is of the type described in any of clauses (1) through (7) of
Section 10.02. In such case, the amendment or waiver shall bind each Holder of a
Note who has consented to it and every subsequent Holder of a Note that
evidences the same debt as the consenting Holder's Note.

Section 10.05  Notation on or Exchange of Notes

           The Trustee may place an appropriate notation about an amendment or
waiver on any Note thereafter authenticated. The Company in exchange for all
Notes may issue and the Trustee shall authenticate new Notes that reflect the
amendment or waiver.

Section 10.06  Trustee to Sign Amendments, etc.

           The Trustee shall sign any amendment or supplemental indenture
authorized pursuant to this Article 10 if the amendment does not adversely
affect the rights, duties, liabilities or immunities of the Trustee. If it does,
the Trustee may, but need not, sign it. In signing or refusing to sign such
amendment or supplemental indenture, the Trustee shall be entitled to receive
and, subject to Section 8.01, shall be fully protected in relying upon, an
Officers' Certificate and an Opinion of Counsel as conclusive evidence that such
amendment or supplemental indenture is authorized or permitted by this
Indenture, that it is not inconsistent herewith and that it will be valid and
binding upon the Company in accordance with its terms.

                                  ARTICLE 11
                                 MISCELLANEOUS

Section 11.01  Trust Indenture Act Controls

           If any provision of this Indenture limits, qualifies or conflicts
with the duties imposed by TIA ss. 318(c), the imposed duties shall control.



 
Section 11.02  Notices

           Any notice or communication by the Company or the Trustee to the
other is duly given if in writing and delivered in Person or mailed by
first-class mail (registered or certified, return receipt requested), telecopier
or overnight air courier guaranteeing next day delivery, to the other's address:

           If to the Company:  ICF Kaiser International, Inc.
                               9300 Lee Highway
                               Fairfax, Virginia  22031-1207
                               Attention: Executive Vice President and Chief
                                          Financial Officer
                               cc:  Senior Vice President and General Counsel
                              
           If to the Trustee:  The Bank of New York
                               101 Barclay Street, 21 West
                               New York, New York 10286
                               Attention: Corporate Trust Trustee Administration

           The Company or the Trustee by notice to the other may designate
additional or different addresses for subsequent notices or communications.

           All notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; five Business
Days after being deposited in the mail, postage prepaid, if mailed; when receipt
acknowledged, if telecopied; and the next Business Day after timely delivery to
the courier, if sent by overnight air courier guaranteeing next day delivery.

           Any notice or communication to a Holder shall be mailed by
first-class mail to the Holder's address shown on the register kept by the
Registrar. Failure to mail a notice or communication to a Holder or any defect
in it shall not affect its sufficiency with respect to other Holders.

           If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it.

           If the Company mails a notice or communication to Holders, it shall
 mail a copy to the Trustee and each Agent at the same time.

Section 11.03  Certificate and Opinion as to Conditions Precedent

           Upon any request or application by the Company to the Trustee to take
any action under this Indenture, the Company shall furnish to the Trustee:

           (1) an Officers' Certificate (which shall include the statements set
forth in Section 11.04) stating that, in the opinion of the signers, all
conditions precedent and covenants, if any, provided for in this Indenture
relating to the proposed action have been complied with; and

           (2) an Opinion of Counsel (which shall include the statements set
forth in Section 11.04) stating that, in the opinion of such counsel, all such
conditions precedent and covenants have been complied with.

Section 11.04  Statements Required in Certificate or Opinion

           Each certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (other than a certificate
provided pursuant to Section 314(a)(4) of the TIA) shall include:


 
           (1) a statement that the Person making such certificate or opinion
has read such covenant or condition; 
           (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 such Person, 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; and
           (4) a statement as to whether or not, in the opinion of such Person,
such condition or covenant has been complied with.

Section 11.05  Rules by Trustee and Agents

           The Trustee may make reasonable rules for action by or at a meeting
of Holders. The Registrar or Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

Section 11.06  Legal Holidays

           A "Legal Holiday" is a Saturday, a Sunday or a day on which banking
institutions in The City of New York or at a place of payment are authorized or
obligated by law, regulation or executive order to remain closed. If a payment
date is a Legal Holiday at a place of payment, payment may be made at that place
on the next succeeding day that is not a Legal Holiday, and no interest shall
accrue for the intervening period. 

Section 11.07  No Recourse Against Others

           A director, officer, employee or stockholder of the Company, as such,
shall not have any liability for any obligations of the Company under the Notes
or this Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Holder by accepting a Note waives and
releases all such liability.

Section 11.08  Governing Law

           THIS INDENTURE AND THE NOTES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAW.

Section 11.09  No Adverse Interpretation of Other Agreements

           This Indenture may not be used to interpret another indenture, loan
or debt agreement of the Company or a Subsidiary. Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

Section 11.10  Successors

           All agreements of the Company in this Indenture and the Notes shall
bind its successor. All agreements of the Trustee in this Indenture shall bind
its successor.

Section 11.11  Severability

           In case any provision in this Indenture or in the Notes 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 11.12  Counterpart 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.

Section 11.13  Trustee as Paying Agent and Registrar


 
           The Company initially appoints the Trustee as Paying Agent and
Registrar.

Section 11.14  Table of Contents, Headings, etc.

           The Table of Contents, Cross-Reference Table and Headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part hereof and shall in no way
modify or restrict any of the terms or provisions hereof.

                                  SIGNATURES

                                  ICF KAISER INTERNATIONAL, INC.
                                  Issuer

                                  By:   /s/ James O. Edwards
                                  Title:  Chairman and Chief Executive Officer

                                  THE BANK OF NEW YORK
                                  Trustee

                                  By: /s/ B. Merino
                                  Title:  Assistant Treasurer


 
                                   EXHIBIT A

                            [FORM OF SERIES A NOTE]

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD
WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS
EXCEPT AS SET FORTH BELOW. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS
THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A
PROMULGATED UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED
INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2), (3) OR (7) PROMULGATED UNDER THE
SECURITIES ACT (AN "ACCREDITED INVESTOR")) OR (C) IT IS NOT A U.S. PERSON AND IS
ACQUIRING THIS SECURITY IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH REGULATION
S PROMULGATED UNDER THE SECURITIES ACT, (2) AGREES THAT IT WILL NOT WITHIN THREE
YEARS AFTER THE ORIGINAL ISSUANCE OF THIS SECURITY RESELL OR OTHERWISE TRANSFER
THIS SECURITY EXCEPT (A) TO THE ISSUER THEREOF OR ANY SUBSIDIARY THEREOF, (B)
INSIDE THE UNITED STATES TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH
RULE 144A PROMULGATED UNDER THE SECURITIES ACT, (C) INSIDE THE UNITED STATES TO
AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHED (OR
HAS FURNISHED ON ITS BEHALF BY A U.S. BROKER-DEALER) TO THE TRUSTEE A SIGNED
LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
RESTRICTIONS ON TRANSFER OF THIS SECURITY, (D) OUTSIDE THE UNITED STATES IN AN
OFFSHORE TRANSACTION IN COMPLIANCE WITH REGULATION S PROMULGATED UNDER THE
SECURITIES ACT, (E) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE
144 PROMULGATED UNDER THE SECURITIES ACT (IF AVAILABLE), OR (F) PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT
WILL GIVE TO EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF
THIS SECURITY WITHIN THREE YEARS AFTER THE ORIGINAL ISSUANCE OF THIS SECURITY,
IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR, THE HOLDER
MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE AND THE ISSUER SUCH
CERTIFICATIONS, WRITTEN LEGAL OPINIONS OR OTHER INFORMATION AS EITHER OF THEM
MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO
AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE
TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE RESPECTIVE MEANINGS
GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.


 
                         ICF KAISER INTERNATIONAL, INC.

                       12% SENIOR NOTE DUE 2003, SERIES A

                                                  CUSIP No. 449244_____

No.                                               $____________________

ICF Kaiser International, Inc., a Delaware corporation (the "Company"), for
value received promises to pay to [ ], or registered assigns, the principal sum
of _______________ Dollars on December 31, 2003.

Interest Payment Dates:  June 30 and December 31

Record Dates:  June 15 and December 15

Reference is made to the further provisions of this Security contained herein,
which will for all purposes have the same effect as if set forth at this place.

IN WITNESS WHEREOF, the Company has caused the Security to be signed manually or
by facsimile by its duly authorized officers.

Dated:

ICF KAISER INTERNATIONAL, INC.

By:
   ------------------------------------
By:
   ------------------------------------
         (SEAL)

                     Trustee's Certificate of Authentication

This is one of the Series A Notes referred to in the within-mentioned Indenture.

Dated:                                 THE BANK OF NEW YORK
                                       as Trustee

                                       By:
                                          -----------------------------------
                                                 Authorized Signatory


 
                             [REVERSE OF SECURITY]

                      12% SENIOR NOTE DUE 2003, SERIES A

           Certain capitalized terms used but not defined herein shall have the
meanings given to them in the Indenture under which this Note is issued.

           1. Interest. ICF Kaiser International, Inc., a Delaware corporation
(the "Company," which term shall include any Successor under the Indenture),
promises to pay interest on the principal amount of this Note at 12%, provided
that one percent (1%) additional interest (the "Additional Interest") is payable
on the Notes from the date of, and as provided in, the Indenture. The Company
files its financial results with the Securities and Exchange Commission on
quarterly and annual reports, and these reports include the Company's earnings
after deducting minority interests and before interest, taxes, depreciation, and
amortization calculated in accordance with generally accepted accounting
principles ("Earnings"). The Company measures its Earnings for trailing twelve
month periods, each period to end on the last day of a fiscal quarter and extend
no further than March 31, 1998 (each a "Quarterly Measurement Period"). If the
Company's Earnings equal or exceed $36 million for two consecutive Quarterly
Measurement Periods, then the Company is relieved of its obligation to pay any
future Additional Interest. However, if the Company's Earnings do not equal or
exceed $36 million for any subsequent Quarterly Measurement Period, up to and
including the Quarterly Measurement Period ending March 31, 1998, the Company is
obligated to commence paying Additional Interest until the Company's Earnings
again equal or exceed $36 million on a trailing twelve month basis calculated
quarterly. The Company will pay interest semiannually on June 30 and December 31
of each year, or if any such day is not a Business Day, on the next succeeding
Business Day (each an "Interest Payment Date"). Interest on the Notes will
accrue from the most recent date on which interest has been paid or, if no
interest has been paid, from the date of issuance; provided, that if there is no
existing Default in the payment of interest, and if this Note is authenticated
between a record date referred to on the face hereof and the next succeeding
Interest Payment Date, interest shall accrue from such next succeeding Interest
Payment Date; provided, further, that the first Interest Payment Date shall be
June 30, 1997. The Company shall pay interest on overdue principal from time to
time on demand at the rate of 1% per annum in excess of the interest rate then
in effect; it shall pay interest on overdue installments of interest (without
regard to any applicable grace periods) from time to time on demand at the same
rate to the extent lawful. Interest will be computed on the basis of a 360-day
year of twelve 30-day months.

           2. Method of Payment. The Company will pay interest on the Notes
(except defaulted interest) to the Persons who are registered Holders of Notes
at the close of business on the record date next preceding the Interest Payment
Date, even if such Notes are cancelled after such record date and on or before
such Interest Payment Date. Holders must surrender Notes to a Paying Agent to
collect principal payments. The Company will pay the principal of, premium, if
any, and interest on the Notes in money of the United States of America that at
the time of payment is legal tender for payment of public and private debts
("U.S. Legal Tender"). The Company, however, may pay such amounts by check
payable in such U.S. Legal Tender. It may mail an interest check to a Holder's
registered address.

           3. Paying Agent and Registrar. Initially, The Bank of New York (the
"Trustee") will act as Paying Agent and Registrar. The Company may change any
Paying Agent, Registrar or co-registrar without notice to any Holder. The
Company may act in any such capacity.

           4. Indenture and Guarantees. The Company issued the Notes under an
Indenture dated as of December 23, 1996 (the "Indenture") between the Company
and the Trustee. The terms of the Notes include those stated in the Indenture
and those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended (15 U.S. Code ss.ss. 77aaa-77bbbb), as in effect on the date of
execution of the Indenture until such time as the Indenture is qualified under
the TIA, and thereafter as in effect on the date on which the Indenture is
qualified under the TIA. The Notes are subject to all such terms, and Holders
are referred to the Indenture and such Act for a statement of such terms.
Capitalized and certain other terms used herein and not otherwise defined have
the meanings set forth in the Indenture. The Notes are unsecured general
obligations of the Company limited to $15,000,000 in aggregate principal amount.
Payment on each Note is guaranteed, jointly and severally, by the Guarantors
pursuant to Section 5.11 of the Indenture.

           5. Optional Redemption. The Notes may not be redeemed prior to
December 31, 1998, but will be redeemable at the option of the Company, in whole
or in part, at any time on or after December 31, 1998, at the following
redemption 


 
prices (expressed as percentages of principal amount), together with
accrued and unpaid interest, if any, thereon to the redemption date, if redeemed
during the 12-month period beginning December 31:

 
 
                                                         Optional
                Year                                Redemption Price
                ----                                ----------------
                                                       
                1998                                      108.0%
                1999                                      106.4%
                2000                                      104.8%
                2001                                      103.2%
                2002                                      101.6%
 

     If fewer than all of the Notes are to be redeemed at any time, selection of
the Notes to be redeemed will be made by the Trustee from among the outstanding
Notes on a pro rata basis, by lot or by any other method permitted in the
Indenture. Notice of redemption will be mailed at least 30 days but not more
than 60 days before the redemption date to each Holder whose Notes are to be
redeemed at the registered address of such Holder. On and after the redemption
date, interest shall cease to accrue on the Notes or portions thereof called for
redemption.

6.   Offers to Repurchase.

     (a) Change of Control Offer. In accordance with the terms of the Indenture,
upon the occurrence of a Change of Control, the Company will be required to
offer (a "Change of Control Offer") to purchase all outstanding Notes at a
purchase price equal to 101% of the aggregate principal amount of the Notes,
plus accrued and unpaid interest to the date of purchase.

     A Holder of Notes may tender or refrain from tendering all or any portion
of his Notes at his discretion by completing the form entitled "OPTION OF HOLDER
TO ELECT PURCHASE" appearing below on this Note. Any portion of Notes tendered
must be in integral multiples of $1,000.

     (b) Asset Sale Offer. In accordance with the terms of the Indenture,
if the Company or any Restricted Subsidiary consummates an Asset Sale, the
Company will, under certain circumstances, be required to utilize a portion of
the net proceeds received from such Asset Sale to offer to purchase Notes at a
purchase price equal to 100% of the aggregate principal amount of the Notes plus
accrued interest to the date fixed for the purchase.

     A Holder of Notes may tender or refrain from tendering all or any
portion of his Notes at his discretion by completing the form entitled "OPTION
OF HOLDER TO ELECT PURCHASE" appearing below this Note. Any portion of Notes
tendered must be in integral multiples of $1,000.

     Subject to the provisions described above and compliance with Article
6 of the Indenture, the Company may sell or otherwise dispose of all or
substantially all of its assets to a Successor that assumes all of the Company's
obligations under the Notes and Indenture, and thereafter be discharged from
such obligations.

7.   Denominations, Transfer, Exchange. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and to pay
any taxes and fees required by law or permitted by the Indenture.

8.   Persons Deemed Owners. The registered Holder of a Note may be treated as
its owner for all purposes.

                                       52

 
9.   Unclaimed Funds.  If funds for the payment of principal or interest remain
unclaimed for two years, the Trustee and the Paying Agent will repay the funds
to the Company at its request. After that, all liability of the Trustee and
Paying Agent with respect to such funds shall cease.

10.  Discharge.  The Company may be discharged from its obligations under the
Indenture and the Notes, except for certain provisions thereof, upon
satisfaction of certain conditions specified in the Indenture.

11.  Amendments and Waivers. Subject to certain exceptions, the Indenture or the
Notes may be amended or supplemented with the consent (which may include
consents obtained in connection with a tender offer or exchange offer for Notes)
of the Holders of at least a majority in principal amount of the Notes then
outstanding, and any existing Default under, or compliance with any provision
of, the Indenture may be waived (other than any continuing Default or Event of
Default in the payment of interest on or the principal of the Notes, or any
failure to comply with the provisions of the Indenture relating to a Change of
Control Offer (as defined in the Indenture)) with the consent (which may include
consents obtained in connection with a tender offer or exchange offer for Notes)
of the Holders of a majority in principal amount of the Notes then outstanding.
Without the consent of any Holder, the Company and the Trustee may amend or
supplement the Indenture or the Notes to cure any ambiguity, defect or
inconsistency; to provide for the assumption of the Company's obligations to
Holders in the case of a merger or acquisition; to provide for uncertificated
Notes in addition to or in place of certificated Notes; to make any change that
does not adversely affect the legal rights of any Holder; to surrender any right
or power conferred upon the Company in the Indenture or the Notes; or to modify,
eliminate or add to the provisions of the Indenture or the Notes to such extent
as shall be necessary to effect the qualification of the Indenture under the TIA
or under any similar federal statute hereafter enacted.

     The right of any Holder to participate in any consent required or sought
pursuant to any provision of the Indenture (and the obligation of the Company to
obtain any such consent otherwise required from such Holder) may be subject to
the requirement that such Holder shall have been the Holder of record of any
Notes with respect to which such consent is required or sought as of a date
identified by the Trustee or the Company in a notice furnished to Holder in
accordance with the terms of the Indenture.

     Without the consent of each Holder affected, the Company may not take
certain actions, including: (i) reduce the amount of Notes whose Holders must
consent to an amendment, supplement or waiver; (ii) reduce the rate of or change
the time for payment of interest, including default interest, on any Note; (iii)
reduce the principal of or change the fixed maturity of any Note or alter the
provisions with respect to optional redemption or mandatory repurchase of the
Notes under the Indenture; (iv) make any Note payable in money other than that
stated in this Note; (v) make any change in certain provisions of the Indenture
regarding a Change of Control, a waiver of past Defaults and the rights of
Holders to receive payment; or (vi) waive a continuing Default or Event of
Default in the payment of principal of or interest on the Notes or that resulted
from a failure to comply with the Change of Control provisions of the Indenture.

12.  Restrictive Covenants. The Indenture contains certain covenants which,
among other things, limit: (i) the incurrence of additional Indebtedness by the
Company and Restricted Subsidiaries; (ii) the payment of dividends; (iii) the
repurchase of capital stock or subordinated indebtedness; (iv) the making of
certain other distributions, loans and investments; (v) the sale of assets and
the sale of the stock of Restricted Subsidiaries; (vi) the creation of
restrictions on the ability of Restricted Subsidiaries to pay dividends or make
other payments to the Company; and (vii) the ability of the Company and
Restricted Subsidiaries to enter into certain transactions with Affiliates or to
merge, consolidate or transfer substantially all assets. These restrictions are
subject to important qualifications and exceptions. The Company must report to
the Trustee on compliance with such limitations.

13.  Defaults and Remedies. Events of Default include: default in payment of
interest on the Notes for 30 days; default in payment of principal on the Notes;
failure by the Company for 60 days after notice to it to comply with any of its
other agreements in the Indenture or the Notes; certain defaults under other
Indebtedness; certain final judgments that remain undercharged; and certain
events of bankruptcy or insolvency. If an Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the then outstanding Notes may declare all the Notes to be immediately due and
payable for an amount equal to 100% of the principal amount of the Notes plus
accrued interest to the date of payment, except that in the case of an Event of
Default arising from certain events of bankruptcy or insolvency, all outstanding
Notes become due and payable immediately without further action or notice.


 
Holders may not enforce the Indenture or the Notes except as provided in the
Indenture. The Trustee may require indemnity satisfactory to it before it
enforces the Indenture or the Notes. Subject to certain limitations, Holders of
a majority in principal amount of the then outstanding Notes may direct the
Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders notice of any continuing default (except a default in payment of
principal or interest) if it determines that withholding notice is in their
interests. The Company must furnish an annual compliance certificate to the
Trustee.

14.  Trustee Dealings with Company. The Trustee, in its individual or any other
capacity, may make loans to, accept deposits from, and perform services for the
Company or its Affiliates, and may otherwise deal with the Company or its
Affiliates, as if it were not Trustee.

15.  No Recourse Against Others. A director, officer, employee or stockholder,
as such, of the Company shall not have any liability for any obligations of the
Company under the Notes or the Indenture or for any claim based on, in respect
of or by reason of such obligations or their creation. Each Holder by accepting
a Note waives and releases all such liability. The waiver and release are part
of the consideration for the issuance of the Notes.

16.  Authentication. This Note shall not be valid until authenticated by the
manual signature of the Trustee or an authenticating agent.

17.  Abbreviations. Customary abbreviations may be used in the name of a Holder
or an assignee, such as: TEN COM (-- tenants in common), TEN ENT (-- tenants by
the entireties), JT TEN (-- joint tenants with right of survivorship and not as
tenants in common), CUST (--Custodian), and U/G/M/A (-- Uniform Gifts to Minors
Act).

18.  CUSIP Numbers. Pursuant to a recommendation promulgated by the Commission
on Uniform Security Identification Procedures, the Company has caused CUSIP
Numbers to be printed on the Notes as a convenience to the Holders of the Notes.
No representation is made to the accuracy of such numbers as provided on the
Notes, and reliance may be placed only on the other identification numbers
printed thereon.

19.  Governing Law. THIS NOTE AND THE INDENTURE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD
TO PRINCIPLES OF CONFLICTS OF LAW.

20.  Registration Rights. Pursuant to the Registration Rights Agreement, the
Company will be obligated upon the occurrence of certain events to consummate an
exchange offer pursuant to which the Holders of the Series A Notes shall have
the right to exchange the Series A Notes for the Company's 12% Senior Notes due
2003, Series B, which have been registered under the Securities Act, in like
principal amount and having terms identical in all material respects as the
Series A Notes. The Holders shall be entitled to receive certain additional
interest payments in the event such exchange offer is not consummated and upon
certain other conditions, all pursuant to and in accordance with the terms of
the Registration Rights Agreement.

     The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Request may be made to:

                         ICF Kaiser International, Inc.
                         9300 Lee Highway
                         Fairfax, Virginia 22031-1207
                         Attention:  Executive Vice President and
                         Chief Financial Officer


 
                                    GUARANTEE

           The Guarantors (as defined in the Indenture referred to in the Note
upon which this notation is endorsed and each hereinafter referred to as a
"Guarantor," which term includes any successor to a Guarantor) have
unconditionally guaranteed (such guarantee by each Guarantor being referred to
herein as the "Guarantee") (a) the full and prompt payment of the principal of
and premium, if any, on any Note when and as the same shall come due and
payable, whether at the stated maturity thereof, by acceleration, redemption or
otherwise and (b) the full and prompt payment of any interest on any Note when
and as the same shall become due, according to the terms of such Note and the
Indenture.

           No stockholder, officer, director or incorporator, as such, past,
present or future, of any Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

           The Guarantees shall not be valid or obligatory for any purpose until
the certificate of authentication on the Notes upon which the guarantees are
noted shall have been executed by the Trustee under the indenture by the manual
signature of its authorized officers.


                                  CYGNA CONSULTING ENGINEERS AND

Attest:                           BY:
       ---------------------------
                                        Name:
                                        Title:

                                  ICF KAISER GOVERNMENT PROGRAMS, INC.

Attest:                           BY:
       ---------------------------
                                        Name:
                                        Title:

                                  PCI OPERATING COMPANY, INC.

Attest:                           BY:
       ---------------------------
                                        Name:
                                        Title:

                                  SYSTEMS APPLICATIONS INTERNATIONAL, INC.

Attest:                           BY:
       ---------------------------
                                        Name:
                                        Title:


 
                                 ASSIGNMENT FORM

           To assign this Note, fill in the form below: (I) or (we) assign and
transfer this Note to


- ---------------------------------------------
(Insert assignee's Soc. Sec. or tax I.D. No.)

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

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

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

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

and irrevocably appoint
                        ---------------------
to transfer this Note on the books of the Company. The agent may substitute
another to act for him.


Date:
        -------------------------------------


                                   Your Signature:
                                                   ---------------------------
                                   (Sign exactly as your name appears on the
                                   face of this Note)


Signature Guarantee:

 
                       OPTION OF HOLDER TO ELECT PURCHASE
   
           If you want to elect to have this Note purchased by the Company
pursuant to an Asset Sale Offer or a Change in Control Offer, please execute and
return this form to the Company.

           If you want to elect to have only part of the Note purchased by the
Company pursuant to the Indenture, state the amount you elect to have purchased:
$
 -----------------------



Date:
     -------------------------------   

                               Your Signature:
                                              --------------------------------
                               (Sign exactly as your name appears on the face
                                of this Note)

Signature Guarantee:

 
                                    EXHIBIT B

                             [FORM OF SERIES B NOTE]

                         ICF KAISER INTERNATIONAL, INC.

                       12% SENIOR NOTE DUE 2003, SERIES B


                                                          CUSIP No. 449244
                                                                          -----

No.                                        $
                                           ----------------------

ICF Kaiser International, Inc., a Delaware corporation (the "Company"), for
value received promises to pay to [  ], or registered assigns, the principal sum
of                 Dollars on December 31, 2003.
   ---------------     

Interest Payment Dates:  June 30 and December 31

Record Dates:  June 15 and December 15

Reference is made to the further provisions of this Security contained herein,
which will for all purposes have the same effect as if set forth at this place.

IN WITNESS WHEREOF, the Company has caused the Security to be signed manually or
by facsimile by its duly authorized officers.

Dated:


ICF KAISER INTERNATIONAL, INC.

By:
     --------------------------------------    
   

By:
     --------------------------------------     
                (SEAL)

 
                     Trustee's Certificate of Authentication


         This is one of the Series B Notes referred to in the within-mentioned
         Indenture.




Dated:                                 THE BANK OF NEW YORK
                                       as Trustee


                                       By:
                                           -----------------------------------
                                                   Authorized Signatory

 
                              [REVERSE OF SECURITY]
                       12% SENIOR NOTE DUE 2003, SERIES B

        Certain capitalized terms used but not defined herein shall have the
meanings given to them in the Indenture under which this Note is issued.


1.      Interest. ICF Kaiser International, Inc., a Delaware corporation (the
"Company," which term shall include any Successor under the Indenture), promises
to pay interest on the principal amount of this Note at 12% provided that one
percent (1%) additional interest (the "Additional Interest") is payable on the
Notes from the date of, and as provided in, the Indenture. The Company files its
financial results with the Securities and Exchange Commission on quarterly and
annual reports, and these reports include the Company's earnings after deducting
minority interests and before interest, taxes, depreciation, and amortization
calculated in accordance with generally accepted accounting principles
("Earnings"). The Company measures its Earnings for trailing twelve month
periods, each period to end on the last day of a fiscal quarter and extend no
further than March 31, 1998 (each a "Quarterly Measurement Period"). If the
Company's Earnings equal or exceed $36 million for two consecutive Quarterly
Measurement Periods, then the Company is relieved of its obligation to pay any
future Additional Interest. However, if the Company's Earnings do not equal or
exceed $36 million for any subsequent Quarterly Measurement Period, up to and
including the Quarterly Measurement Period ending March 31, 1998, the Company is
obligated to commence paying Additional Interest until the Company's Earnings
again equal or exceed $36 million on a trailing twelve month basis calculated
quarterly. The Company will pay interest semiannually on June 30 and December 31
of each year, or if any such day is not a Business Day, on the next succeeding
Business Day (each an "Interest Payment Date"). Interest on the Notes will
accrue from the most recent date on which interest has been paid or, if no
interest has been paid, from the date of issuance; provided, that if there is no
existing Default in the payment of interest, and if this Note is authenticated
between a record date referred to on the face hereof and the next succeeding
Interest Payment Date, interest shall accrue from such next succeeding Interest
Payment Date; provided, further, that the first Interest Payment Date shall be
June 30, 1997. The Company shall pay interest on overdue principal from time to
time on demand at the rate of 1% per annum in excess of the interest rate then
in effect; it shall pay interest on overdue installments of interest (without
regard to any applicable grace periods) from time to time on demand at the same
rate to the extent lawful. Interest will be computed on the basis of a 360-day
year of twelve 30-day months.

2.      Method of Payment. The Company will pay interest on the Notes (except
defaulted interest) to the Persons who are registered Holders of Notes at the
close of business on the record date next preceding the Interest Payment Date,
even if such Notes are cancelled after such record date and on or before such
Interest Payment Date. Holders must surrender Notes to a Paying Agent to collect
principal payments. The Company will pay the principal of, premium, if any, and
interest on the Notes in money of the United States of America that at the time
of payment is legal tender for payment of public and private debts ("U.S. Legal
Tender"). The Company, however, may pay such amounts by check payable in such
U.S. Legal Tender. It may mail an interest check to a Holder's registered
address.

3.      Paying Agent and Registrar. Initially, The Bank of New York (the
"Trustee") will act as Paying Agent and Registrar. The Company may change any
Paying Agent, Registrar or co-registrar without notice to any Holder. The
Company may act in any such capacity.

4.      Indenture and Guarantees. The Company issued the Notes under an
Indenture dated as of December 23, 1996 (the "Indenture") between the Company
and the Trustee. The terms of the Notes include those stated in the Indenture
and those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended (15 U.S. Code (S)(S) 77aaa-77bbbb), as in effect on the date of
execution of the Indenture until such time as the Indenture is qualified under
the TIA, and thereafter as in effect on the date on which the Indenture is
qualified under the TIA. The Notes are subject to all such terms, and Holders
are referred to the Indenture and such Act for a statement of such terms.
Capitalized and certain other terms used herein and not otherwise defined have
the meanings set forth in the Indenture. The Notes are unsecured general
obligations of the Company limited to $15,000,000 in aggregate principal amount.
Payment on each Note is guaranteed, jointly and severally, by the Guarantors
pursuant to Section 5.11 of the Indenture.

 
5.      Optional Redemption. The Notes may not be redeemed prior to December 31,
1998, but will be redeemable at the option of the Company, in whole or in part,
at any time on or after December 31, 1998, at the following redemption prices
(expressed as percentages of principal amount), together with accrued and unpaid
interest, if any, thereon to the redemption date, if redeemed during the
12-month period beginning December 31:

                                                 Optional
                 Year                        Redemption Price
                 ----                        ----------------
                                            
                 1998                              108.0%
                 1999                              106.4%
                 2000                              104.8%
                 2001                              103.2%
                 2002                              101.6%

        If fewer than all of the Notes are to be redeemed at any time, selection
of the Notes to be redeemed will be made by the Trustee from among the
outstanding Notes on a pro rata basis, by lot or by any other method permitted
in the Indenture. Notice of redemption will be mailed at least 30 days but not
more than 60 days before the redemption date to each Holder whose Notes are to
be redeemed at the registered address of such Holder. On and after the
redemption date, interest shall cease to accrue on the Notes or portions thereof
called for redemption.

6.      Offers to Repurchase.

        (a)     Change of Control Offer. In accordance with the terms of the
Indenture, upon the occurrence of a Change of Control, the Company will be
required to offer (a "Change of Control Offer") to purchase all outstanding
Notes at a purchase price equal to 101% of the aggregate principal amount of the
Notes, plus accrued and unpaid interest to the date of purchase.

        A Holder of Notes may tender or refrain from tendering all or any
portion of his Notes at his discretion by completing the form entitled "OPTION
OF HOLDER TO ELECT PURCHASE" appearing below on this Note. Any portion of Notes
tendered must be in integral multiples of $1,000.

        (b) Asset Sale Offer. In accordance with the terms of the Indenture,
if the Company or any Restricted Subsidiary consummates an Asset Sale, the
Company will, under certain circumstances, be required to utilize a portion of
the net proceeds received from such Asset Sale to offer to purchase Notes at a
purchase price equal to 100% of the aggregate principal amount of the Notes plus
accrued interest to the date fixed for the purchase.

        A Holder of Notes may tender or refrain from tendering all or any
portion of his Notes at his discretion by completing the form entitled "OPTION
OF HOLDER TO ELECT PURCHASE" appearing below this Note. Any portion of Notes
tendered must be in integral multiples of $1,000.

        Subject to the provisions described above and compliance with Article
6 of the Indenture, the Company may sell or otherwise dispose of all or
substantially all of its assets to a Successor that assumes all of the Company's
obligations under the Notes and Indenture, and thereafter be discharged from
such obligations.

        The Notes rank pari passu with the $125,000,000 12% Senior
Subordinated Notes due 2003 issued by the Company pursuant to an Indenture dated
as of January 11, 1994 between the Company and The Bank of New York as Trustee.

7. Denominations, Transfer, Exchange. The Notes are in registered form without
coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and to pay
any taxes and fees required by law or permitted by the Indenture.

 
8.      Persons Deemed Owners. The registered Holder of a Note may be treated as
its owner for all purposes.

9.      Unclaimed Funds.  If funds for the payment of principal or interest
remain unclaimed for two years, the Trustee and the Paying Agent will repay the
funds to the Company at its request. After that, all liability of the Trustee
and Paying Agent with respect to such funds shall cease.

10.     Discharge.  The Company may be discharged from its obligations under the
Indenture and the Notes, except for certain provisions thereof, upon
satisfaction of certain conditions specified in the Indenture.

11.     Amendments and Waivers. Subject to certain exceptions, the Indenture or
the Notes may be amended or supplemented with the consent (which may include
consents obtained in connection with a tender offer or exchange offer for Notes)
of the Holders of at least a majority in principal amount of the Notes then
outstanding, and any existing Default under, or compliance with any provision
of, the Indenture may be waived (other than any continuing Default or Event of
Default in the payment of interest on or the principal of the Notes, or any
failure to comply with the provisions of the Indenture relating to a Change of
Control Offer (as defined in the Indenture)) with the consent (which may include
consents obtained in connection with a tender offer or exchange offer for Notes)
of the Holders of a majority in principal amount of the Notes then outstanding.
Without the consent of any Holder, the Company and the Trustee may amend or
supplement the Indenture or the Notes to cure any ambiguity, defect or
inconsistency; to provide for the assumption of the Company's obligations to
Holders in the case of a merger or acquisition; to provide for uncertificated
Notes in addition to or in place of certificated Notes; to make any change that
does not adversely affect the legal rights of any Holder; to surrender any right
or power conferred upon the Company in the Indenture or the Notes; or to modify,
eliminate or add to the provisions of the Indenture or the Notes to such extent
as shall be necessary to effect the qualification of the Indenture under the TIA
or under any similar federal statute hereafter enacted.

        The right of any Holder to participate in any consent required or
sought pursuant to any provision of the Indenture (and the obligation of the
Company to obtain any such consent otherwise required from such Holder) may be
subject to the requirement that such Holder shall have been the Holder of record
of any Notes with respect to which such consent is required or sought as of a
date identified by the Trustee or the Company in a notice furnished to Holder in
accordance with the terms of the Indenture.

        Without the consent of each Holder affected, the Company may not take
certain actions, including: (i) reduce the amount of Notes whose Holders must
consent to an amendment, supplement or waiver; (ii) reduce the rate of or change
the time for payment of interest, including default interest, on any Note; (iii)
reduce the principal of or change the fixed maturity of any Note or alter the
provisions with respect to optional redemption or mandatory repurchase of the
Notes under the Indenture; (iv) make any Note payable in money other than that
stated in this Note; (v) make any change in certain provisions of the Indenture
regarding a Change of Control, a waiver of past Defaults and the rights of
Holders to receive payment; or (vi) waive a continuing Default or Event of
Default in the payment of principal of or interest on the Notes or that resulted
from a failure to comply with the Change of Control provisions of the Indenture.

12.     Restrictive Covenants. The Indenture contains certain covenants which,
among other things, limit: (i) the incurrence of additional Indebtedness by the
Company and Restricted Subsidiaries; (ii) the payment of dividends; (iii) the
repurchase of capital stock or subordinated indebtedness; (iv) the making of
certain other distributions, loans and investments; (v) the sale of assets and
the sale of the stock of Restricted Subsidiaries; (vi) the creation of
restrictions on the ability of Restricted Subsidiaries to pay dividends or make
other payments to the Company; and (vii) the ability of the Company and
Restricted Subsidiaries to enter into certain transactions with Affiliates or to
merge, consolidate or transfer substantially all assets. These restrictions are
subject to important qualifications and exceptions. The Company must report to
the Trustee on compliance with such limitations.

13.     Defaults and Remedies. Events of Default include: default in payment of
interest on the Notes for 30 days; default in payment of principal on the Notes;
failure by the Company for 60 days after notice to it to comply with any of its
other agreements in the Indenture or the Notes; certain defaults under other
Indebtedness; certain final judgments that remain undercharged; and certain
events of bankruptcy or insolvency. If an Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the then outstanding Notes may declare all the Notes to be immediately due and
payable for an amount equal to 100% of the principal amount of the Notes plus

 
accrued interest to the date of payment, except that in the case of an Event of
Default arising from certain events of bankruptcy or insolvency, all outstanding
Notes become due and payable immediately without further action or notice.
Holders may not enforce the Indenture or the Notes except as provided in the
Indenture. The Trustee may require indemnity satisfactory to it before it
enforces the Indenture or the Notes. Subject to certain limitations, Holders of
a majority in principal amount of the then outstanding Notes may direct the
Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders notice of any continuing default (except a default in payment of
principal or interest) if it determines that withholding notice is in their
interests. The Company must furnish an annual compliance certificate to the
Trustee.

14.     Trustee Dealings with Company. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its Affiliates, and may otherwise deal with the Company or
its Affiliates, as if it were not Trustee.

15.     No Recourse Against Others. A director, officer, employee or
stockholder, as such, of the Company shall not have any liability for any
obligations of the Company under the Notes or the Indenture or for any claim
based on, in respect of or by reason of such obligations or their creation. Each
Holder by accepting a Note waives and releases all such liability. The waiver
and release are part of the consideration for the issuance of the Notes.

16.     Authentication. This Note shall not be valid until authenticated by the
manual signature of the Trustee or an authenticating agent.

17.     Abbreviations. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (-- tenants in common), TEN ENT (--
tenants by the entireties), JT TEN (-- joint tenants with right of survivorship
and not as tenants in common), CUST (--Custodian), and U/G/M/A (-- Uniform Gifts
to Minors Act).

18.     CUSIP Numbers. Pursuant to a recommendation promulgated by the
Commission on Uniform Security Identification Procedures, the Company has caused
CUSIP Numbers to be printed on the Notes as a convenience to the Holders of the
Notes. No representation is made to the accuracy of such numbers as provided on
the Notes, and reliance may be placed only on the other identification numbers
printed thereon.

19.     Governing Law. THIS NOTE AND THE INDENTURE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD
TO PRINCIPLES OF CONFLICTS OF LAW.

        The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Request may be made to:

                              ICF Kaiser International, Inc.
                              9300 Lee Highway
                              Fairfax, Virginia 22031-1207
                              Attention: Executive Vice President and
                              Chief Financial Officer

 
                                    GUARANTEE

        The Guarantors (as defined in the Indenture referred to in the Note upon
which this notation is endorsed and each hereinafter referred to as a
"Guarantor," which term includes any successor to a Guarantor) have
unconditionally guaranteed (such guarantee by each Guarantor being referred to
herein as the "Guarantee") (a) the full and prompt payment of the principal of
and premium, if any, on any Note when and as the same shall come due and
payable, whether at the stated maturity thereof, by acceleration, redemption or
otherwise and (b) the full and prompt payment of any interest on any Note when
and as the same shall become due, according to the terms of such Note and the
Indenture.

        No stockholder, officer, director or incorporator, as such, past,
present or future, of any Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

        The Guarantees shall not be valid or obligatory for any purpose until
the certificate of authentication on the Notes upon which the guarantees are
noted shall have been executed by the Trustee under the indenture by the manual
signature of its authorized officers.

GUARANTORS:

                                         CYGNA CONSULTING ENGINEERS AND

Attest:                                  BY:
        --------------------------------- 
                                               Name:
                                               Title:

                                         ICF KAISER GOVERNMENT PROGRAMS, INC.

Attest:                                  BY:
        ---------------------------------
                                               Name:
                                               Title:


                                         PCI OPERATING COMPANY, INC.

Attest:                                  BY:
        ---------------------------------
                                              Name:
                                              Title:

                                         SYSTEMS APPLICATIONS INTERNATIONAL, 
                                         INC.

Attest:                                  BY:
        ---------------------------------
                                              Name:
                                              Title:

 
                                ASSIGNMENT FORM

           To assign this Note, fill in the form below: (I) or (we) assign and
transfer this Note to 


- ------------------------------------------
(Insert assignee's Soc. Sec. or tax I.D. No.)


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

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

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

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

 
and irrevocably appoint
                        ------------------                
to transfer this Note on the books of the Company. The agent may substitute
another to act for him.


Date:
      -----------------------------------  
                                         
                                         Your Signature:
                                                         ----------------------
                                         (Sign exactly as your name appears on
                                         the face of this Note)

Signature Guarantee:

 

                       OPTION OF HOLDER TO ELECT PURCHASE


           If you want to elect to have this Note purchased by the Company
pursuant to an Asset Sale Offer or a Change in Control Offer, please execute and
return this form to the Company.

           If you want to elect to have only part of the Note purchased by the
Company pursuant to the Indenture, state the amount you elect to have purchased:
$
 -----------------------------

Date:
      -------------------------

                               Your Signature:
                                              ---------------------------------
                               (Sign exactly as your name appears on the face 
                               of this Note)

Signature Guarantee:

 
                                   EXHIBIT C

                        FORM OF LEGEND FOR GLOBAL NOTES


Any Global Note authenticated and delivered hereunder shall bear a legend (which
would be in addition to any other legends required in the case of a Restricted
Note) in substantially the following form:

        THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A
NOMINEE OF A DEPOSITORY OR A SUCCESSOR DEPOSITORY. THIS NOTE IS NOT EXCHANGEABLE
FOR NOTES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITORY OR ITS
NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO
TRANSFER OF THIS NOTE (OTHER THAN A TRANSFER OF THIS NOTE AS A WHOLE BY THE
DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO
THE DEPOSITORY OR ANOTHER NOMINEE OF THE DEPOSITORY) MAY BE REGISTERED EXCEPT IN
THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

        UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

 
                                 EXHIBIT D

                   CERTIFICATE TO BE DELIVERED UPON EXCHANGE
                     OR REGISTRATION OF TRANSFER OF NOTES


   Re:                                  12% Senior Notes due 2003, Series A, and
                                             12% Senior Notes due 2003, Series B
                                (the "Notes"), of ICF Kaiser International, Inc.
                                ------------------------------------------------

This Certificate relates to $_____ principal amount of Notes held in the form
of* ___ a beneficial interest in a Global Note or* ______ Physical Notes by
_____ (the "Transferor").

The Transferor:*

           __
          /__/   has requested by written order that the Registrar deliver in
exchange for its beneficial interest in the Global Note held by the Depositary a
Physical Note or Physical Notes in definitive, registered form of authorized
denominations and an aggregate principal amount equal to its beneficial interest
in such Global Note (or the portion thereof indicated above); or

           __
          /__/   has requested that the Registrar by written order to exchange
or register the transfer of a Physical Note or Physical Notes.

          In connection with such request and in respect of each such Note, the
Transferor does hereby certify that the Transferor is familiar with the
Indenture relating to the above captioned Notes and the restrictions on
transfers thereof as provided in Section 2.05 of such Indenture, and that the
transfer of this Note does not require registration under the Securities Act of
1933, as amended (the "Act") because*:

           __
          /__/   Such Note is being acquired for the Transferor's own account,
without transfer (in satisfaction of Section 2.05(a)(B)(I) or Section
2.05(d)(i)(A) of the Indenture).

           __  
          /__/   Such Note is being transferred to a "qualified institutional
buyer" (as defined in Rule 144A under the Act), in reliance on Rule 144A.

           __
          /__/   Such Note is being transferred to an institutional "accredited
investor" (within the meaning of subparagraphs (a)(1), (2), (3) or (7) of Rule
501 under the Act).

           __
          /__/   Such Note is being transferred in reliance on Regulation S
under the Act.

           __
          /__/   Such Note is being transferred in reliance on Rule 144 under
the Act. 

           __
          /__/   Such Note is being transferred in reliance on and in compliance
with an exemption from the registration requirements of the Act other than Rule
144A or Rule 144 or Regulation S under the Act to a person other than an
institutional "accredited investor."


                                   ---------------------------------------
                                [INSERT NAME OF TRANSFEROR]

                                By:
                                   ---------------------------------------
                                [Authorized Signatory]


Date:
     ----------------------
    *Check applicable box.

 
                                   EXHIBIT E

                           Form of Certificate to Be
                         Delivered in Connection with
                Transfers to Institutional Accredited Investors
                -----------------------------------------------



                                                       ________________, ______

The Bank of New York
101 Barclay Street, 21 West
New York, New York  10286
Attention:  Corporate Trust Trustee Administration


Re:   ICF Kaiser International, Inc. (the "Company") Indenture (the "Indenture")
      relating to 12% Senior Notes due 2003, Series A, and 12% Senior Notes due
      2003, Series B
      --------------------------------------------------

Ladies and Gentlemen:

     In connection with our proposed purchase of 12% Senior Notes due 2003,
Series A, or 12% Senior Notes due 2003, Series B (the "Notes"), of the Company,
we confirm that:

1.     We have received such information as we deem necessary in order to make
our investment decision.

2.     We understand that any subsequent transfer of the Notes is subject to
certain restrictions and conditions set forth in the Indenture and the
undersigned agrees to be bound by, and not to resell, pledge or otherwise
transfer the Notes except in compliance with, such restrictions and conditions
and the Securities Act of 1933, as amended (the "Securities Act").

3.     We understand that the offer and sale of the Notes have not been
registered under the Securities Act, and that the Notes may not be offered or
sold within the United States or to, or for the account or benefit of, U.S.
persons except as permitted in the following sentence. We agree, on our own
behalf and on behalf of any accounts for which we are acting as hereinafter
stated, that if we should sell any Notes, we will do so only (A) to the Company
or any subsidiary thereof, (B) inside the United States in accordance with Rule
144A under the Securities Act to a "qualified institutional buyer" (as defined
therein), (C) inside the United States to an institutional "accredited investor"
(as defined below) that, prior to such transfer, furnishes (or has furnished on
its behalf by a U.S. broker-dealer) to the Trustee a signed letter substantially
in the form hereof, (D) outside the United States in accordance with Regulation
S under the Securities Act, (E) pursuant to the exemption from registration
provided by Rule 144 under the Securities Act (if available) or (F) pursuant to
an effective registration statement under the Securities Act, and we further
agree to provide to any person purchasing Notes from us a notice advising such
purchaser that resales of the Notes are restricted as stated herein.

4.     We understand that, on any proposed resale of Notes, we will be required
to furnish to the Trustee and the Company, such certification, legal opinions
and other information as the Trustee and the Company may reasonably require to
confirm that the proposed sale complies with the foregoing restrictions.  We
further understand that the Notes purchased by us will bear a legend to the
foregoing effect.

5.     We are an institutional "accredited investor" (as defined in Rule
501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have
such knowledge and experience in financial and business matters as to be capable
of evaluating the merits and risks of our investment in the Notes, and we and
any accounts for which we are acting are each able to bear the economic risk of
our or their investment, as the case may be.

 
6.     We are acquiring the Notes purchased by us for our account or for one or
more accounts (each of which is an institutional "accredited investor") as to
each of which we exercise sole investment discretion.

       You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.


                                 Very truly yours,
  
                                 [Name of Transferor]



                                 By:
                                    ----------------------------
                                 [Authorized Signatory]

 
                                   EXHIBIT F

                           Form of Certificate to Be
                         Delivered in Connection with
                          with Regulation S Transfers
                        -------------------------------


                                                       ________________, ______


The Bank of New York
101 Barclay Street, 21 West
New York, New York  10286
Attention:  Corporate Trust Trustee Administration

                              Re: ICF Kaiser International, Inc. (the "Company")
                              Indenture (the "Indenture") relating to 12% Senior
                              Notes due 2003, Series A, and 12% Senior Notes
                              due 2003, Series B (the "Notes")
                              --------------------------------------------------

Dear Sirs:

     In connection with our proposed sale of $_________________ aggregate
principal amount of the Notes, we confirm that such sale has been effected
pursuant to and in accordance with Regulation S under the Securities Act of
1933, as amended (the "Securities Act"), and, accordingly, we represent that:

(1)  the offer of the Notes was not made to a person in the United States;

(2)  either (a) at the time the buy offer was originated, the transferee was
     outside the United States or we and any person acting on our behalf
     reasonably believed that the transferee was outside the United States, or
     (b) the transaction was executed in, on or through the facilities of a
     designated offshore securities market and neither we nor any person acting
     on our behalf knows that the transaction has been pre-arranged with a buyer
     in the United States;

(3)  no directed selling efforts have been made in the United States in
     contravention of the requirements of Rule 903(b) or Rule 904(b) of
     Regulation S, as applicable;

(4)  the transaction is not part of a plan or scheme to evade the registration
     requirements of the Securities Act; and

(5)  we have advised the transferee of the transfer restrictions applicable to
     the Notes.

     You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.  Defined terms used herein without
definition have the respective meanings provided in Regulation S.

                                    Very truly yours,

                                    [Name of Transferor]


                                    By:
                                       ------------------------------
                                         [Authorized Signature]

 
                                   EXHIBIT G

                               FORM OF GUARANTEE

 
     FOR VALUE RECEIVED, [name of subsidiary], a corporation duly organized and
existing under the laws of the State [state] (herein called the "Guarantor",
which term includes any successor corporation under the Indenture dated December
23, 1996, as supplemented (herein called the "Indenture") referred to in the
Notes to which this Guarantee relates), hereby unconditionally guarantees to the
Holders from time to time of the Notes:

(a)  the full and prompt payment of the principal of, and premium, if any, on
any Note when and as the same shall come due and payable, whether at the stated
maturity thereof, by acceleration, redemption or otherwise, and

(b)  the full and prompt payment of any interest on any Note when and as the
same shall become due, according to the terms of such Note and the Indenture.

     In addition, the Guarantor hereby unconditionally agrees that upon default
by the Company in the payment when due of the principal of, premium, if any, on
and interest on the Notes (whether at stated maturity thereof, acceleration,
redemption or otherwise), the Guarantor will forthwith pay the same, without
further notice or demand.

     The obligations of the Guarantor hereunder shall be absolute and
unconditional and, except as otherwise provided herein, shall remain in full
force and effect until the entire principal of, premium, if any, on, and
interest on the Notes shall have been paid or provided for in accordance with
the provisions of the Indenture, and such obligations shall not be affected,
modified or impaired upon the happening from time to time of any event,
including without limitation any of the following, whether or not with notice
to, or the consent of, the Guarantor:

(a)  the waiver, surrender, compromise, settlement, release, or termination of
any or all of the obligations, covenants, or agreements of the Company under the
Indenture or the Notes, unless the waiver, surrender, compromise, settlement,
release or termination is made specifically applicable to the Guarantor;

b)  the failure to give notice to the Guarantor of the occurrence of an Event of
Default;
     
(c)  the waiver, compromise, or release of the payment, performance or
observance by the Company of any or all of its obligations, covenants or
agreements contained in the Indenture, unless such waiver, compromise or release
is specifically applicable to the Guarantor;

(d)  the extension of time for payment of any principal of, premium, if any, on,
or interest on any Notes or for any other payments under the Indenture or of the
time for performance of any other obligations, covenants or agreements under or
arising out of the Indenture, unless such extension of time is specifically
applicable to the Guarantor;

(e)  the modification or amendment (whether material or otherwise) of any
obligation, covenant, or agreement set forth in the Indenture or the Notes,
unless such modification or amendment is specifically applicable to the
Guarantor;

(f)  the taking or the omission of any of the actions referred to in the
Indenture and any of the actions under the Notes;

(g)  any failure, omission, delay, or lack on the part of the Trustee to
enforce, assert or exercise any right, power or remedy conferred on the Trustee
in the Indenture, or any other act or acts on the part of the Trustee or any of
the Holders from time to time of the Notes;

(h)  the voluntary or involuntary liquidation, dissolution, sale, or other
disposition of all or substantially all of the assets, marshalling of assets and
liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of
creditors, reorganization, arrangement, composition with creditors, or
readjustment of, or other similar proceedings affecting the 

 
Guarantor, or the Company or any of the assets of any of them, or any allegation
or contest of the validity of this Guarantee in any such proceeding;

(i)  to the extent permitted by law, the release or discharge by operation of
law of the Company from the performance or observance of any obligation,
covenant, or agreement contained in the Indenture, unless the Guarantor is also
released or discharged by operation of law;

(j)  the default or failure of the Guarantor or the Trustee fully to perform any
of its obligations set forth in the Indenture or the Notes; or

(k)  the invalidity of the Indenture or the Notes or any part thereof.

     No set-off, counterclaim, reduction, or diminution of any obligation, or
any defense of any kind or nature which the Guarantor has or may have against
the Trustee shall be available hereunder to the Guarantor against the Trustee to
reduce the payments of the Guarantor under this Guarantee.

     The Guarantor shall be released from all of its obligations under this
Guarantee if:

(a)  the Guarantor has sold all or substantially all of its assets or the
     Company and its Restricted Subsidiaries have sold all of the Capital Stock
     of the Guarantor owned by them, in each case in a transaction in compliance
     with Sections 5.09 and 6.01 of the Indenture; or

(b)  The Guarantor merges with or into or consolidates with, or transfers all or
     substantially all of its assets to, the Company or another Guarantor in a
     transaction in compliance with Section 6.01 hereof;

and in each such case, the Company has delivered to the Trustee an Officer's
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for in the Indenture relating to such transactions have been
complied with.

     No stockholder, officer, director or incorporator, as such, past, present
or future, of the Guarantor shall have any liability under this Guarantee by
reason of his or its status as such stockholder, officer, director or
incorporator.

     This Guarantee shall be governed by and construed in accordance with the
laws of the State of New York, without regard to principles of conflicts of
laws.

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

     Unless the certificate of authentication on the Note to which this
Guarantee is endorsed has been executed by or on behalf of the Trustee, by the
manual signature of its, or its Authenticating Agent's, authorized signatories,
this Guarantee shall not be valid or obligatory for any purpose.

                                    IN WITNESS WHEREOF, the Guarantor has caused
this Guarantee to  be duly executed.

Dated:                              [Name of Subsidiary]

[CORPORATE SEAL]                    By:
                                        -----------------------------
                                                                           Title

Attest:
       ----------------
Secretary

 
                                   EXHIBIT H

     GUARANTEE OF CYGNA CONSULTING ENGINEERS AND PROJECT MANAGEMENT, INC.

          FOR VALUE RECEIVED, Cygna Consulting Engineers and Projects
Management, Inc., a corporation duly organized and existing under the laws of
the State of California (herein called the "Guarantor", which term includes any
successor corporation under the Indenture dated December 23, 1996, as
supplemented (herein called the "Indenture") referred to in the Notes to which
this Guarantee relates), hereby unconditionally guarantees to the Holders from
time to time of the Notes:

          (a) the full and prompt payment of the principal of, and premium, if
any, on any Note when and as the same shall come due and payable, whether at the
stated maturity thereof, by acceleration, redemption or otherwise, and

          (b) the full and prompt payment of any interest on any Note when and
as the same shall become due, according to the terms of such Note and the
Indenture.

          In addition, the Guarantor hereby unconditionally agrees that upon
default by the Company in the payment when due of the principal of, premium, if
any, on and interest on the Notes (whether at stated maturity thereof,
acceleration, redemption or otherwise), the Guarantor will forthwith pay the
same, without further notice or demand.

          The obligations of the Guarantor hereunder shall be absolute and
unconditional and, except as otherwise provided herein, shall remain in full
force and effect until the entire principal of, premium, if any, on, and
interest on the Notes shall have been paid or provided for in accordance with
the provisions of the Indenture, and such obligations shall not be affected,
modified or impaired upon the happening from time to time of any event,
including without limitation any of the following, whether or not with notice
to, or the consent of, the Guarantor:

          (a) the waiver, surrender, compromise, settlement, release, or
termination of any or all of the obligations, covenants, or agreements of the
Company under the Indenture or the Notes, unless the waiver, surrender,
compromise, settlement, release or termination is made specifically applicable
to the Guarantor;
 
          (b) the failure to give notice to the Guarantor of the occurrence of
an Event of Default;
 
          (c) the waiver, compromise, or release of the payment, performance or
observance by the Company of any or all of its obligations, covenants or
agreements contained in the Indenture, unless such waiver, compromise or release
is specifically applicable to the Guarantor;

          (d) the extension of time for payment of any principal of, premium, if
any, on, or interest on any Notes or for any other payments under the Indenture
or of the time for performance of any other obligations, covenants or agreements
under or arising out of the Indenture, unless such extension of time is
specifically applicable to the Guarantor;

          (e) the modification or amendment (whether material or otherwise) of
any obligation, covenant, or agreement set forth in the Indenture or the Notes,
unless such modification or amendment is specifically applicable to the
Guarantor;

          (f) the taking or the omission of any of the actions referred to in
the Indenture and any of the actions under the Notes;

          (g) any failure, omission, delay, or lack on the part of the Trustee
to enforce, assert or exercise any right, power or remedy conferred on the
Trustee in the Indenture, or any other act or acts on the part of the Trustee or
any of the Holders from time to time of the Notes;

 
          (h) the voluntary or involuntary liquidation, dissolution, sale, or
other disposition of all or substantially all of the assets, marshalling of
assets and liabilities, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition with creditors,
or readjustment of, or other similar proceedings affecting the Guarantor, or the
Company or any of the assets of any of them, or any allegation or contest of the
validity of this Guarantee in any such proceeding;

          (i) to the extent permitted by law, the release or discharge by
operation of law of the Company from the performance or observance of any
obligation, covenant, or agreement contained in the Indenture, unless the
Guarantor is also released or discharged by operation of law;

          (j) the default or failure of the Guarantor or the Trustee fully to
perform any of its obligations set forth in the Indenture or the Notes; or

          (k) the invalidity of the Indenture or the Notes or any part thereof.

          No set-off, counterclaim, reduction, or diminution of any obligation,
or any defense of any kind or nature which the Guarantor has or may have against
the Trustee shall be available hereunder to the Guarantor against the Trustee to
reduce the payments of the Guarantor under this Guarantee.

          The Guarantor shall be released from all of its obligations under this
Guarantee if:

          (a) the Guarantor has sold all or substantially all of its assets or
the Company and its Restricted Subsidiaries have sold all of the Capital Stock
of the Guarantor owned by them, in each case in a transaction in compliance with
Sections 5.09 and 6.01 of the Indenture; or

          (b) The Guarantor merges with or into or consolidates with, or
transfers all or substantially all of its assets to, the Company or another
Guarantor in a transaction in compliance with Section 6.01 hereof;

and in each such case, the Company has delivered to the Trustee an Officer's
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for in the Indenture relating to such transactions have been
complied with.

          No stockholder, officer, director or incorporator, as such, past,
present or future, of the Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

          This Guarantee shall be governed by and construed in accordance with
the laws of the State of New York, without regard to principles of conflicts of
laws.

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

          Unless the certificate of authentication on the Note to which this
Guarantee is endorsed has been executed by or on behalf of the Trustee, by the
manual signature of its, or its Authenticating Agent's, authorized signatories,
this Guarantee shall not be valid or obligatory for any purpose.

          IN WITNESS WHEREOF, the Guarantor has caused this Guarantee to be
duly executed.

                    CYGNA CONSULTING ENGINEERS AND PROJECT MANAGEMENT, INC.

[CORPORATE SEAL]  By: /s/ Michael K. Goldman,
                  Title: President
Attest:
/s/ Paul Weeks, II, Secretary

 
                                   EXHIBIT I

               GUARANTEE OF ICF KAISER GOVERNMENT PROGRAMS, INC.
                                        
          FOR VALUE RECEIVED, ICF Kaiser Government Programs, Inc., a
corporation duly organized and existing under the laws of the State of Delaware
(herein called the "Guarantor", which term includes any successor corporation
under the Indenture dated December 23, 1996, as supplemented (herein called the
"Indenture") referred to in the Notes to which this Guarantee relates), hereby
unconditionally guarantees to the Holders from time to time of the Notes:

          (a) the full and prompt payment of the principal of, and premium, if
any, on any Note when and as the same shall come due and payable, whether at the
stated maturity thereof, by acceleration, redemption or otherwise, and

          (b) the full and prompt payment of any interest on any Note when and
as the same shall become due, according to the terms of such Note and the
Indenture.

          In addition, the Guarantor hereby unconditionally agrees that upon
default by the Company in the payment when due of the principal of, premium, if
any, on and interest on the Notes (whether at stated maturity thereof,
acceleration, redemption or otherwise), the Guarantor will forthwith pay the
same, without further notice or demand.

          The obligations of the Guarantor hereunder shall be absolute and
unconditional and, except as otherwise provided herein, shall remain in full
force and effect until the entire principal of, premium, if any, on, and
interest on the Notes shall have been paid or provided for in accordance with
the provisions of the Indenture, and such obligations shall not be affected,
modified or impaired upon the happening from time to time of any event,
including without limitation any of the following, whether or not with notice
to, or the consent of, the Guarantor:

          (a) the waiver, surrender, compromise, settlement, release, or
termination of any or all of the obligations, covenants, or agreements of the
Company under the Indenture or the Notes, unless the waiver, surrender,
compromise, settlement, release or termination is made specifically applicable
to the Guarantor;
 
          (b) the failure to give notice to the Guarantor of the occurrence of
an Event of Default;
 
          (c) the waiver, compromise, or release of the payment, performance or
observance by the Company of any or all of its obligations, covenants or
agreements contained in the Indenture, unless such waiver, compromise or release
is specifically applicable to the Guarantor;

          (d) the extension of time for payment of any principal of, premium, if
any, on, or interest on any Notes or for any other payments under the Indenture
or of the time for performance of any other obligations, covenants or agreements
under or arising out of the Indenture, unless such extension of time is
specifically applicable to the Guarantor;

          (e) the modification or amendment (whether material or otherwise) of
any obligation, covenant, or agreement set forth in the Indenture or the Notes,
unless such modification or amendment is specifically applicable to the
Guarantor;

          (f) the taking or the omission of any of the actions referred to in
the Indenture and any of the actions under the Notes;

          (g) any failure, omission, delay, or lack on the part of the Trustee
to enforce, assert or exercise any right, power or remedy conferred on the
Trustee in the Indenture, or any other act or acts on the part of the Trustee or
any of the Holders from time to time of the Notes;

 
          (h) the voluntary or involuntary liquidation, dissolution, sale, or
other disposition of all or substantially all of the assets, marshalling of
assets and liabilities, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition with creditors,
or readjustment of, or other similar proceedings affecting the Guarantor, or the
Company or any of the assets of any of them, or any allegation or contest of the
validity of this Guarantee in any such proceeding;

          (i) to the extent permitted by law, the release or discharge by
operation of law of the Company from the performance or observance of any
obligation, covenant, or agreement contained in the Indenture, unless the
Guarantor is also released or discharged by operation of law;

          (j) the default or failure of the Guarantor or the Trustee fully to
perform any of its obligations set forth in the Indenture or the Notes; or

          (k) the invalidity of the Indenture or the Notes or any part thereof.

          No set-off, counterclaim, reduction, or diminution of any obligation,
or any defense of any kind or nature which the Guarantor has or may have against
the Trustee shall be available hereunder to the Guarantor against the Trustee to
reduce the payments of the Guarantor under this Guarantee.

          The Guarantor shall be released from all of its obligations under this
Guarantee if:

     (a) the Guarantor has sold all or substantially all of its assets or the
Company and its Restricted Subsidiaries have sold all of the Capital Stock of
the Guarantor owned by them, in each case in a transaction in compliance with
Sections 5.09 and 6.01 of the Indenture; or

     (b) The Guarantor merges with or into or consolidates with, or transfers
all or substantially all of its assets to, the Company or another Guarantor in a
transaction in compliance with Section 6.01 hereof;

and in each such case, the Company has delivered to the Trustee an Officer's
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for in the Indenture relating to such transactions have been
complied with.

          No stockholder, officer, director or incorporator, as such, past,
present or future, of the Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

          This Guarantee shall be governed by and construed in accordance with
the laws of the State of New York, without regard to principles of conflicts of
laws.

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

          Unless the certificate of authentication on the Note to which this
Guarantee is endorsed has been executed by or on behalf of the Trustee, by the
manual signature of its, or its Authenticating Agent's, authorized signatories,
this Guarantee shall not be valid or obligatory for any purpose.

          IN WITNESS WHEREOF, the Guarantor has caused this Guarantee to be
duly executed.

                                         ICF KAISER GOVERNMENT PROGRAMS, INC.

[CORPORATE SEAL]         By:   /s/ James O. Edwards
                               Title  President
Attest:
/s/ Paul Weeks, II, Secretary

 
                                   EXHIBIT J

                   GUARANTEE OF PCI OPERATING COMPANY, INC.

          FOR VALUE RECEIVED, PCI Operating Company, Inc., a corporation duly
organized and existing under the laws of the State of Delaware (herein called
the "Guarantor", which term includes any successor corporation under the
Indenture dated December 23, 1996, as supplemented (herein called the
"Indenture") referred to in the Notes to which this Guarantee relates), hereby
unconditionally guarantees to the Holders from time to time of the Notes:

          (a) the full and prompt payment of the principal of, and premium, if
any, on any Note when and as the same shall come due and payable, whether at the
stated maturity thereof, by acceleration, redemption or otherwise, and

          (b) the full and prompt payment of any interest on any Note when and
as the same shall become due, according to the terms of such Note and the
Indenture.

          In addition, the Guarantor hereby unconditionally agrees that upon
default by the Company in the payment when due of the principal of, premium, if
any, on and interest on the Notes (whether at stated maturity thereof,
acceleration, redemption or otherwise), the Guarantor will forthwith pay the
same, without further notice or demand.

          The obligations of the Guarantor hereunder shall be absolute and
unconditional and, except as otherwise provided herein, shall remain in full
force and effect until the entire principal of, premium, if any, on, and
interest on the Notes shall have been paid or provided for in accordance with
the provisions of the Indenture, and such obligations shall not be affected,
modified or impaired upon the happening from time to time of any event,
including without limitation any of the following, whether or not with notice
to, or the consent of, the Guarantor:

          (a) the waiver, surrender, compromise, settlement, release, or
termination of any or all of the obligations, covenants, or agreements of the
Company under the Indenture or the Notes, unless the waiver, surrender,
compromise, settlement, release or termination is made specifically applicable
to the Guarantor;
 
          (b) the failure to give notice to the Guarantor of the occurrence of
an Event of Default;
 
          (c) the waiver, compromise, or release of the payment, performance or
observance by the Company of any or all of its obligations, covenants or
agreements contained in the Indenture, unless such waiver, compromise or release
is specifically applicable to the Guarantor;

          (d) the extension of time for payment of any principal of, premium, if
any, on, or interest on any Notes or for any other payments under the Indenture
or of the time for performance of any other obligations, covenants or agreements
under or arising out of the Indenture, unless such extension of time is
specifically applicable to the Guarantor;

          (e) the modification or amendment (whether material or otherwise) of
any obligation, covenant, or agreement set forth in the Indenture or the Notes,
unless such modification or amendment is specifically applicable to the
Guarantor;

          (f) the taking or the omission of any of the actions referred to in
the Indenture and any of the actions under the Notes;

          (g) any failure, omission, delay, or lack on the part of the Trustee
to enforce, assert or exercise any right, power or remedy conferred on the
Trustee in the Indenture, or any other act or acts on the part of the Trustee or
any of the Holders from time to time of the Notes;

 
          (h) the voluntary or involuntary liquidation, dissolution, sale, or
other disposition of all or substantially all of the assets, marshalling of
assets and liabilities, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition with creditors,
or readjustment of, or other similar proceedings affecting the Guarantor, or the
Company or any of the assets of any of them, or any allegation or contest of the
validity of this Guarantee in any such proceeding;

          (i) to the extent permitted by law, the release or discharge by
operation of law of the Company from the performance or observance of any
obligation, covenant, or agreement contained in the Indenture, unless the
Guarantor is also released or discharged by operation of law;

          (j) the default or failure of the Guarantor or the Trustee fully to
perform any of its obligations set forth in the Indenture or the Notes; or

          (k) the invalidity of the Indenture or the Notes or any part thereof.

          No set-off, counterclaim, reduction, or diminution of any obligation,
or any defense of any kind or nature which the Guarantor has or may have against
the Trustee shall be available hereunder to the Guarantor against the Trustee to
reduce the payments of the Guarantor under this Guarantee.

          The Guarantor shall be released from all of its obligations under this
Guarantee if:

          (a) the Guarantor has sold all or substantially all of its assets or
the Company and its Restricted Subsidiaries have sold all of the Capital Stock
of the Guarantor owned by them, in each case in a transaction in compliance with
Sections 5.09 and 6.01 of the Indenture; or

          (b) The Guarantor merges with or into or consolidates with, or
transfers all or substantially all of its assets to, the Company or another
Guarantor in a transaction in compliance with Section 6.01 hereof;

and in each such case, the Company has delivered to the Trustee an Officer's
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for in the Indenture relating to such transactions have been
complied with.

          No stockholder, officer, director or incorporator, as such, past,
present or future, of the Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

          This Guarantee shall be governed by and construed in accordance with
the laws of the State of New York, without regard to principles of conflicts of
laws.

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

          Unless the certificate of authentication on the Note to which this
Guarantee is endorsed has been executed by or on behalf of the Trustee, by the
manual signature of its, or its Authenticating Agent's, authorized signatories,
this Guarantee shall not be valid or obligatory for any purpose.

 
          IN WITNESS WHEREOF, the Guarantor has caused this Guarantee to be
duly executed.

Dated: December 23, 1996

          PCI OPERATING COMPANY, INC.



[CORPORATE SEAL]  By:  /s/ Michael K. Goldman
                  Title  Chief Executive Officer


Attest:

/s/ Paul Weeks, II
Secretary

 
                                   EXHIBIT K
             GUARANTEE OF SYSTEMS APPLICATIONS INTERNATIONAL, INC.

 
          FOR VALUE RECEIVED, Systems Applications International, Inc., a
corporation duly organized and existing under the laws of the State of Delaware
(herein called the "Guarantor", which term includes any successor corporation
under the Indenture dated December 23, 1996, as supplemented (herein called the
"Indenture") referred to in the Notes to which this Guarantee relates), hereby
unconditionally guarantees to the Holders from time to time of the Notes:

          (a) the full and prompt payment of the principal of, and premium, if
any, on any Note when and as the same shall come due and payable, whether at the
stated maturity thereof, by acceleration, redemption or otherwise, and

          (b) the full and prompt payment of any interest on any Note when and
as the same shall become due, according to the terms of such Note and the
Indenture.

          In addition, the Guarantor hereby unconditionally agrees that upon
default by the Company in the payment when due of the principal of, premium, if
any, on and interest on the Notes (whether at stated maturity thereof,
acceleration, redemption or otherwise), the Guarantor will forthwith pay the
same, without further notice or demand.

          The obligations of the Guarantor hereunder shall be absolute and
unconditional and, except as otherwise provided herein, shall remain in full
force and effect until the entire principal of, premium, if any, on, and
interest on the Notes shall have been paid or provided for in accordance with
the provisions of the Indenture, and such obligations shall not be affected,
modified or impaired upon the happening from time to time of any event,
including without limitation any of the following, whether or not with notice
to, or the consent of, the Guarantor:

          (a) the waiver, surrender, compromise, settlement, release, or
termination of any or all of the obligations, covenants, or agreements of the
Company under the Indenture or the Notes, unless the waiver, surrender,
compromise, settlement, release or termination is made specifically applicable
to the Guarantor;
 
          (b) the failure to give notice to the Guarantor of the occurrence of
an Event of Default;
 
          (c) the waiver, compromise, or release of the payment, performance or
observance by the Company of any or all of its obligations, covenants or
agreements contained in the Indenture, unless such waiver, compromise or release
is specifically applicable to the Guarantor;

          (d) the extension of time for payment of any principal of, premium, if
any, on, or interest on any Notes or for any other payments under the Indenture
or of the time for performance of any other obligations, covenants or agreements
under or arising out of the Indenture, unless such extension of time is
specifically applicable to the Guarantor;

          (e) the modification or amendment (whether material or otherwise) of
any obligation, covenant, or agreement set forth in the Indenture or the Notes,
unless such modification or amendment is specifically applicable to the
Guarantor;

          (f) the taking or the omission of any of the actions referred to in
the Indenture and any of the actions under the Notes;

          (g) any failure, omission, delay, or lack on the part of the Trustee
to enforce, assert or exercise any right, power or remedy conferred on the
Trustee in the Indenture, or any other act or acts on the part of the Trustee or
any of the Holders from time to time of the Notes;

 
          (h) the voluntary or involuntary liquidation, dissolution, sale, or
other disposition of all or substantially all of the assets, marshalling of
assets and liabilities, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition with creditors,
or readjustment of, or other similar proceedings affecting the Guarantor, or the
Company or any of the assets of any of them, or any allegation or contest of the
validity of this Guarantee in any such proceeding;

          (i) to the extent permitted by law, the release or discharge by
operation of law of the Company from the performance or observance of any
obligation, covenant, or agreement contained in the Indenture, unless the
Guarantor is also released or discharged by operation of law;

          (j) the default or failure of the Guarantor or the Trustee fully to
perform any of its obligations set forth in the Indenture or the Notes; or

          (k) the invalidity of the Indenture or the Notes or any part thereof.

          No set-off, counterclaim, reduction, or diminution of any obligation,
or any defense of any kind or nature which the Guarantor has or may have against
the Trustee shall be available hereunder to the Guarantor against the Trustee to
reduce the payments of the Guarantor under this Guarantee.

          The Guarantor shall be released from all of its obligations under this
Guarantee if:

          (a) the Guarantor has sold all or substantially all of its assets or
the Company and its Restricted Subsidiaries have sold all of the Capital Stock
of the Guarantor owned by them, in each case in a transaction in compliance with
Sections 5.09 and 6.01 of the Indenture; or

          (b) The Guarantor merges with or into or consolidates with, or
transfers all or substantially all of its assets to, the Company or another
Guarantor in a transaction in compliance with Section 6.01 hereof;

and in each such case, the Company has delivered to the Trustee an Officer's
Certificate and an Opinion of Counsel, each stating that all conditions
precedent provided for in the Indenture relating to such transactions have been
complied with.

          No stockholder, officer, director or incorporator, as such, past,
present or future, of the Guarantor shall have any liability under this
Guarantee by reason of his or its status as such stockholder, officer, director
or incorporator.

          This Guarantee shall be governed by and construed in accordance with
the laws of the State of New York, without regard to principles of conflicts of
laws.

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

          Unless the certificate of authentication on the Note to which this
Guarantee is endorsed has been executed by or on behalf of the Trustee, by the
manual signature of its, or its Authenticating Agent's, authorized signatories,
this Guarantee shall not be valid or obligatory for any purpose.

 
          IN WITNESS WHEREOF, the Guarantor has caused this Guarantee to be
duly executed.


Dated:  December 23, 1996

          SYSTEMS APPLICATIONS
               INTERNATIONAL, INC.



[CORPORATE SEAL]  By:  /s/ Michael K. Goldman
                  Title  Chief Executive Officer


Attest:

/s/ Paul Weeks, II
Secretary