Document:

<PAGE>

                                                                   EXHIBIT 10.56

                                                                  EXECUTION COPY

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

                            PARTICIPATION AGREEMENT

                                     among

                           HANOVER COMPRESSION INC.,
                                  as Lessee,

                        HANOVER EQUIPMENT TRUST 2000B,
                          a Delaware business trust,
                                  as Lessor,

                  BANK HAPOALIM B.M. and FBTC LEASING CORP.,
                                 as Investors,

                        NATIONAL WESTMINSTER BANK PLC,
                              as Managing Agent,

                CITIBANK, N.A., CREDIT SUISSE FIRST BOSTON and
                      THE INDUSTRIAL BANK OF JAPAN, LTD.,
                                 as Co-Agents,

                           THE CHASE MANHATTAN BANK,
                                   as Agent

                                      and

                          THE LENDERS PARTIES HERETO

                            _______________________

                         Dated as of October 27, 2000

                            _______________________
<PAGE>

                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<CAPTION>
                                                                                                               Page
                                                                                                               ----
<S>                                                                                                            <C>
SECTION 1.     THE LOANS..................................................................................        1
----------     --------
     1.1       Loans......................................................................................        1
     ---       -----
     1.2       Credit Agreement...........................................................................        1
     ---       ----------------
     1.3       Collateral For Loans.......................................................................        1
     ---       --------------------
     1.4       Guarantee..................................................................................        1
     ---       ---------

SECTION 2.     INVESTOR CONTRIBUTION......................................................................        1
----------     ---------------------
     2.1       Investor Contribution......................................................................        1
     ---       ---------------------

SECTION 3.     SUMMARY OF THE TRANSACTIONS................................................................        2
----------     ---------------------------
     3.1       Operative Agreements.......................................................................        2
     ---       --------------------
     3.2       Equipment Purchase and Lease...............................................................        2
     ---       ----------------------------
     3.3       Aggregate Tranche A Percentage; Tranche A Percentage.......................................        2
     ---       ----------------------------------------------------

SECTION 4.     THE CLOSINGS...............................................................................        2
----------     ------------
     4.1       Initial Closing Date.......................................................................        2
     ---       --------------------
     4.2       Subsequent Closing Dates...................................................................        2
     ---       ------------------------

SECTION 5.     FUNDING OF ADVANCES........................................................................        3
----------     -------------------
     5.1       General....................................................................................        3
     ---       -------
     5.2       Procedures for Funding.....................................................................        3
     ---       ----------------------

SECTION 6.     CONDITIONS OF THE CLOSINGS AND ADVANCES....................................................        3
----------     ---------------------------------------
     6.1       General Conditions to the Investors' and the Lenders' Obligations to Make Loans and
     ---       -----------------------------------------------------------------------------------
               Investor Contributions.....................................................................        3
               ----------------------
     6.2       Conditions to the Investors' and the Lenders' Obligations to Make Advances to pay
     ---       ---------------------------------------------------------------------------------
               Equipment Acquisition Costs................................................................        6
               ---------------------------

SECTION 7.     REPRESENTATIONS AND WARRANTIES.............................................................        8
----------     ------------------------------

     7.1       Representations and Warranties of the Investors on the Initial Closing Date................        8
     ---       ---------------------------------------------------------------------------
     7.2       Representations and Warranties of Lessor on the Initial Closing Date.......................        9
     ---       --------------------------------------------------------------------
     7.3       Representations and Warranties of the Lessee on the Initial Closing Date...................       11
     ---       ------------------------------------------------------------------------
     7.4       Representations and Warranties of the Trust Company on the Initial Closing Date............       11
     ---       -------------------------------------------------------------------------------
     7.5       Representations and Warranties of the Lessee on Equipment Closing Dates....................       12
     ---       -----------------------------------------------------------------------
     7.6       Representations and Warranties of the Lessor on Equipment Closing Dates....................       15
     ---       -----------------------------------------------------------------------

SECTION 8.     PAYMENT OF CERTAIN EXPENSES................................................................       15
----------     ---------------------------
     8.1       Transaction Expenses.......................................................................       15
     ---       --------------------
     8.2       Brokers' Fees and Stamp Taxes..............................................................       16
     ---       -----------------------------
     8.3       Certain Fees and Expenses..................................................................       16
     ---       --------------------------
 </TABLE>
<PAGE>

<TABLE>
<S>                                                                                                              <C>
     8.4       Credit Agreement and Related Obligations...................................................       16
     ---       ----------------------------------------
     8.5       Commitment Fees............................................................................       17
     ---       ---------------
     8.6       Overdue Rate...............................................................................       17
     ---       ------------
     8.7       Continuous Perfection of Security Interests................................................       17
     ---       -------------------------------------------
     8.8       Oklahoma Equipment Subleases...............................................................       17
     ---       ----------------------------

SECTION 9.     OTHER COVENANTS AND AGREEMENTS.............................................................       17
----------     ------------------------------
     9.1       Covenants of the Trust and the Investors and the Trust Company.............................       17
     ---       --------------------------------------------------------------
     9.2       Repayment of Certain Amounts on Maturity Date..............................................       19
     ---       ---------------------------------------------
     9.3       Amendment of Certain Documents.............................................................       19
     ---       ------------------------------
     9.4       Proceeds of Casualty.......................................................................       20
     ---       --------------------
     9.5       Intercreditor Agreement....................................................................       20
     ---       -----------------------
     9.6       Appraisal..................................................................................       20
     ---       ---------

SECTION 10.    CREDIT AGREEMENT...........................................................................       20
-----------    ----------------
     10.1      Lessee's Credit Agreement Rights...........................................................       20
     ----      --------------------------------

SECTION 11.    TRANSFER OF INTEREST.......................................................................       21
-----------    --------------------
     11.1      Restrictions on Transfer...................................................................       21
     ----      -----------------------
     11.2      Effect of Transfer.........................................................................       22
     ----      ------------------

SECTION 12.    INDEMNIFICATION............................................................................       22
-----------    ---------------
     12.1      General Indemnity..........................................................................       22
     ----      -----------------
     12.2      General Tax Indemnity......................................................................       23
     ----      ---------------------

SECTION 13.    MISCELLANEOUS..............................................................................       26
-----------    -------------
     13.1      Survival of Agreements.....................................................................       26
     ----      ----------------------
     13.2      No Broker, etc.............................................................................       27
     ----      --------------
     13.3      Notices....................................................................................       27
     ----      -------
     13.4      Counterparts...............................................................................       28
     ----      ------------
     13.5      Amendments and Termination.................................................................       28
     ----      --------------------------
     13.6      Headings, etc..............................................................................       29
     ----      -------------
     13.7      Parties in Interest........................................................................       29
     ----      -------------------
     13.8      GOVERNING LAW..............................................................................       29
     ----      -------------
     13.9      Severability...............................................................................       29
     ----      ------------
     13.10     Liability Limited..........................................................................       29
     -----     -----------------
     13.11     Rights of Lessee...........................................................................       29
     -----     ----------------
     13.12     Further Assurances.........................................................................       29
     -----     ------------------
     13.13     Successors and Assigns.....................................................................       30
     -----     ----------------------
     13.14     No Representation or Warranty..............................................................       30
     -----     -----------------------------
     13.15     Highest Lawful Rate........................................................................       30
     -----     -------------------
     13.16     Waiver.....................................................................................       31
     -----     ------
</TABLE>

                                     -ii-
<PAGE>

Annex A        Rules of Usage and Definitions
Annex B        Pricing Grid

Exhibits
--------

Exhibit A      Form of Assignment of Leases and Consent to Assignment
Exhibit B      Form of Security Agreement
Exhibit C      Form of Guarantee
Exhibit D      Form of Requisition
Exhibit E      Equipment Closing Certificate

                                     -iii-
<PAGE>

                                                                               1

          PARTICIPATION AGREEMENT dated as of October 27, 2000 (this
"Agreement"), among HANOVER COMPRESSION INC., a Delaware corporation (the
"Lessee"); HANOVER EQUIPMENT TRUST 2000B, a Delaware business trust (the "Trust"
 ------                                                                   -----
or the "Lessor"); THE CHASE MANHATTAN BANK, a New York banking corporation, as
        ------
agent (in such capacity, the "Agent"); NATIONAL WESTMINSTER BANK PLC, as
                              -----
managing agent (the "Managing Agent"), CITIBANK, N.A., CREDIT SUISSE FIRST
                     --------------
BOSTON and THE INDUSTRIAL BANK OF JAPAN, LTD., as Co-Agents (the "Co-Agents");
                                                                  ---------
BANK HAPOALIM B.M. and FBTC LEASING CORP., as Investors (the "Investors");
                                                              ---------
WILMINGTON TRUST COMPANY, in its individual capacity, and each of the financial
institutions listed on the signature pages hereof (each, a "Lender";
                                                            ------
collectively, the "Lenders").  Capitalized terms used but not otherwise defined
                   -------
in this Agreement shall have the meanings set forth in Annex A hereto.

                             Preliminary Statement
                             ---------------------

          In consideration of the mutual agreements herein contained and other
good and valuable consideration, receipt of which is hereby acknowledged, the
parties hereto hereby agree as follows:

          SECTION 1.     THE LOANS

          1.1  Loans. The Lenders have agreed to make loans to the Lessor in an
          ----------
aggregate principal amount of up to $167,411,167 in order for the Lessor to
acquire the Equipment and to pay other Equipment Acquisition Costs.

          1.2  Credit Agreement. The Loans shall be made pursuant to the Credit
          ---------------------
Agreement. Pursuant to this Agreement and the Credit Agreement, the Loans will
be made to the Lessor from time to time at the request of the Lessee.

          1.3  Collateral For Loans. The Loans and the obligations of the Lessor
          -------------------------
under the Credit Agreement shall be secured by, inter alia, (i) a first priority
                                                ----- ----
assignment of the Lease, granted pursuant to the Assignment of Lease and
consented to by the Lessee pursuant to the Consent to Assignment (in each case
in the respective forms set forth on Exhibit A hereto), and (ii) a first
                                     ---------
priority security interest in each piece of Equipment pursuant to a Security
Agreement in the form set forth on Exhibit B hereto.
                                   ---------

          1.4  Guarantee. The obligations of the Lessor under the Credit
          --------------
Agreement shall be guaranteed by the Guarantors to the extent provided in the
Guarantee (in the form attached hereto as Exhibit C).
                                          ---------

          SECTION 2.     INVESTOR CONTRIBUTION

          2.1  Investor Contribution. Subject to the terms and conditions of
          --------------------------
this Agreement, and in reliance on the representations and warranties of each
of the parties hereto contained herein or made pursuant hereto, on the first
Equipment Closing Date, the Investors shall make an investment in the Lessor (an
"Investor Contribution") in an amount equal to the Investor Commitment.  The
 ---------------------
Lessor shall use the Investor Contributions to pay a portion of the Equipment
Acquisition Costs simultaneously and pro rata with the Loans advanced by the
Lenders.  The Lessee shall have the right to prepay the Investor Contribution,
in connection with the exercise
<PAGE>

                                                                               2

by the Lessee of its right to direct the Lessor to prepay the Loans in
accordance with Section 10.1(e).

          SECTION 3.     SUMMARY OF THE TRANSACTIONS

          3.1  Operative Agreements. On the Initial Closing Date, each of the
          -------------------------
respective parties thereto shall execute and deliver this Agreement, the Lease,
the Security Agreement, the Notes, the Guarantee, the Credit Agreement, the
Assignment of Lease, the Consent to Assignment, and such other documents,
instruments, certificates and opinions of counsel as agreed to by the parties
hereto.

          3.2  Equipment Purchase and Lease. (a) On each Equipment Closing Date
          ---------------------------------
and subject to the terms and conditions of this Agreement and the Credit
Agreement (i) the Lenders will make Loans in accordance with Section 5 hereof
and the terms and provisions of the Credit Agreement, which Loans will be
secured by the Security Agreement executed and delivered by the Lessor and
joined in by the Lessee, (ii) the Lessor will purchase all right, title and
interest of Lessee in and to each piece of Equipment to be purchased on such
Equipment Closing Date and (iii) the Lessor will simultaneously lease all of its
right, title and interest in such Equipment to the Lessee by executing and
delivering a Lease Supplement.

          (b)  On each Equipment Closing Date, the Lessee shall certify to the
Agent on the Equipment Closing Certificate the Tranche A Percentage for each
piece of Equipment being acquired on such Equipment Closing Date. The Tranche A
Percentage so certified shall be the Tranche A Percentage for such piece of
Equipment for the duration of the Term.

          3.3  Aggregate Tranche A Percentage; Tranche A Percentage. (a)
          ---------------------------------------------------------
Notwithstanding any other provision of this Agreement or the other Operative
Agreements, the Lessee agrees that in no event shall the Lessee specify a piece
of Equipment for the Lessor to acquire and lease pursuant to the execution and
delivery of a Lease Supplement if the Aggregate Tranche A Percentage after
giving effect to the acquisition and lease pursuant to the execution and
delivery of a Lease Supplement of such Equipment would be less than 85%.

          (b)  Notwithstanding any other provision of this Agreement or the
other Operative Agreements, the Lessee agrees that in no event shall the Lessee
specify a piece of Equipment for the Lessor to acquire and lease pursuant to the
execution and delivery of a Lease Supplement if the Tranche A Percentage with
respect to such Equipment would be less than 85%.

          SECTION 4.     THE CLOSINGS

          4.1  Initial Closing Date. All documents and instruments required to
          -------------------------
be delivered on the Initial Closing Date shall be delivered at the offices of
Simpson Thacher & Bartlett, 425 Lexington Avenue, New York, New York, or at such
other location as may be determined by the Agent and the Lessee.

          4.2  Subsequent Closing Dates. The Lessee shall deliver to the Lessor,
          -----------------------------
the Investors and the Agent a Requisition appropriately completed, in connection
with each Closing Date.
<PAGE>

                                                                               3
          SECTION 5.     FUNDING OF ADVANCES

          5.1  General. To the extent funds have been made available to the
          ------------
Lessor as Loans and Investor Contributions, the Lessor will: (i) acquire the
Equipment in accordance with the terms of this Agreement and the other Operative
Agreements; (ii) on behalf of the Lessee, pay Transaction Expenses; and (iii)
pay all other Equipment Acquisition Costs.

          5.2  Procedures for Funding. (a) Not less than three Business Days
          ---------------------------
prior to each proposed Closing Date (other than the Initial Closing Date), the
Lessee shall deliver to the Investors and the Agent, a requisition (a
"Requisition"), appropriately completed, in the form of Exhibit D hereto.
 -----------                                            ---------

          (b)  Each Requisition shall: (i) be irrevocable; and (ii) request
funds in an amount of at least $200,000 (or such lesser amounts as shall be
equal to the total aggregate of the Available Commitments plus the Available
Investor Commitment at such time) for the payment of Equipment Acquisition Costs
or other Equipment Acquisition Costs which have previously been incurred and
were not the subject of and funded pursuant to a prior Requisition, in each case
as specified in the Requisition.

          (c)  So long as no Default or Event of Default has occurred and is
continuing and subject to the Lessor and the Agent having each received the
materials required by Section 6.1 and/or 6.2, as applicable, on each Equipment
Closing Date (i) the Lenders shall make Loans to the Lessor in an aggregate
amount not to exceed 97% of the aggregate funds specified in any Requisition, up
to an aggregate principal amount equal to the Available Commitments; (ii) with
respect to the first Equipment Closing Date, the Investors shall have made an
Investor Contribution in an amount equal to the Investor Commitment; and (iii)
the total amount of such Loans made on such date and Investor Contribution made
on the first Equipment Closing Date shall be used to fully cover the aggregate
Equipment Cost (after giving effect to amounts to be paid in connection with the
Equipment Acquisition Cost for such Equipment Closing Date).

          (d)  Notwithstanding anything to the contrary in this Agreement, (i)
the Lenders shall not be required to make Loans in an aggregate amount with
respect to all the Equipment in excess of 97% of the amount allocated to all
such Equipment (after giving effect to the Equipment purchased in connection
with the Requisition).

          SECTION 6.     CONDITIONS OF THE CLOSINGS AND ADVANCES

          6.1  General Conditions to the Investors' and the Lenders'
          ----------------------------------------------------------
Obligations to Make Loans and Investor Contributions. The agreement of each
----------------------------------------------------
Lender to make Loans, and the Investors to make Investor Contributions, is
subject to the satisfaction or waiver, immediately prior to or concurrently with
the making of such Loans and Investor Contribution, of the following conditions
precedent:

          (a)  Operative Agreements. Each of the Operative Agreements entered
               --------------------
     into on the Initial Closing Date or subsequently on an Equipment Closing
     Date shall have been duly authorized, executed, acknowledged and delivered
     by the parties thereto and shall be in full force and effect, and no event
     of default thereunder or default under Section 17.1(a)
<PAGE>

                                                                               4

     or (b) of the Lease shall exist (both before and after giving effect to the
     transactions contemplated by the Operative Agreements), and the Agent and
     the Investors shall have received a fully executed copy of each of the
     Operative Agreements (other than the Notes of which the Agent shall have
     received the originals thereof);

          (b)  Taxes. All taxes, fees and other charges in connection with the
               -----
     execution, delivery, and, where applicable, recording, filing and
     registration of the Operative Agreements shall have been paid or provisions
     for such payment shall have been made to the reasonable satisfaction of the
     Agent and both Investors;

          (c)  Governmental Approvals. All necessary (or, in the reasonable
               ----------------------
     opinion of the Agent, the Investors and their respective counsel,
     advisable) Governmental Actions, in each case required by any law or
     regulation enacted, imposed or adopted on or after the date hereof or by
     any change in fact or circumstances since the date hereof, shall have been
     obtained or made and be in full force and effect;

          (d)  Insurance. The Agent and the Investors shall have received
               ---------
     evidence in form and substance reasonably satisfactory to them that all of
     the requirements of Section 14 of the Lease shall have been satisfied
     (which evidence shall include a report from a reputable insurance broker
     certifying that all such requirements have been satisfied and otherwise in
     form and substance satisfactory to Agent and both Investors);

          (e)  Legal Requirements. The transactions contemplated by the
               ------------------
     Operative Agreements do not and will not violate in any respect any Legal
     Requirements that would reasonably be expected to have a Material Adverse
     Effect and do not and will not subject the Agent, any Lender or the
     Investors to any adverse regulatory prohibitions or constraints;

          (f)  Corporate Proceedings of the Lessee and Each Guarantor. On the
               ------------------------------------------------------
     Initial Closing Date, the Agent and the Investors shall have received a
     copy of the resolutions or minutes, in form and substance satisfactory to
     the Agent and both Investors, of the Board of Directors of the Lessee and
     each Guarantor authorizing the execution, delivery and performance of this
     Agreement, the Guarantee and the other Operative Agreements to which it is
     a party, certified by the Secretary or an Assistant Secretary of the Lessee
     or of such Guarantor as of the Initial Closing Date, which certificate
     shall be in form and substance reasonably satisfactory to the Agent and
     both Investors and shall state that the resolutions or minutes thereby
     certified have not been amended, modified, revoked or rescinded;

          (g)  Lessee and Guarantor Incumbency Certificate. On the Initial
               -------------------------------------------
     Closing Date, the Agent and the Investors shall have received a certificate
     of the Lessee and each Guarantor, dated the Initial Closing Date, as to the
     incumbency and signature of the officers of the Lessee and each Guarantor
     executing any Operative Agreement reasonably satisfactory in form and
     substance to the Agent and both Investors, executed by the President or any
     Vice President and the Secretary or any Assistant Secretary of the Lessee
     or of such Guarantor;
<PAGE>

                                                                               5

          (h)  [Reserved]

          (i)  Corporate Proceedings of the Trust Company. On the Initial
               ------------------------------------------
     Closing Date, the Agent, the Investors and the Lessee shall have received a
     copy of the resolutions, in form and substance reasonably satisfactory to
     the Agent, both Investors and the Lessee, of the Board of Directors of the
     Trust Company authorizing the execution, delivery and performance of the
     Operative Agreements to which it is a party, certified by the Secretary or
     an Assistant Secretary of the Trust Company as of the Initial Closing Date,
     which certificate shall be in form and substance satisfactory to the Agent,
     both Investors and the Lessee and shall state that the resolutions thereby
     certified have not been amended, modified, revoked or rescinded;

          (j)  Trust Company Incumbency Certificate. On the Initial Closing Date
               ------------------------------------
     the Agent, both Investors and the Lessee shall have received a certificate
     of the Trust Company, dated the Initial Closing Date, as to the incumbency
     and signature of the officers of the Trust Company executing any Operative
     Agreement, satisfactory in form and substance to the Agent, both Investors
     and the Lessee, executed by the President or any Vice President, Assistant
     Vice President, or a duly authorized Trust Officer and the Secretary or any
     Assistant Secretary of the Trust Company;

          (k)  Corporate Documents. (i) The Agent and both Investors shall have
               -------------------
     received true and complete copies of the certificate of incorporation and
     by-laws of the Lessee, certified as of the Initial Closing Date as complete
     and correct copies thereof by the Secretary or an Assistant Secretary of
     the Lessee;

                    (ii)  The Agent and the Lessee shall have received true and
     complete copies of the articles of incorporation and by-laws of each of the
     Investors, certified as of the Initial Closing Date as complete and correct
     copies thereof by the Secretary or an Assistant Secretary of each of the
     Investors;

          (l)  Consents, Licenses and Approvals. All consents, authorizations
               --------------------------------
     and filings required in order to allow Lessee to consummate the transaction
     contemplated by this Agreement shall have been obtained and be in full
     force and effect, except to the extent the failure to obtain or maintain
     any such consent, authorization or filing would not individually or in the
     aggregate have a Material Adverse Effect;

          (m)  Fees. The Agent and the Arranger shall have received the fees to
               ----
     be paid on the Initial Closing Date pursuant to the Fee Letter which fees
     shall not be paid using the proceeds of the Loans or Investor
     Contributions;

          (n)  Legal Opinions. (i) On the Initial Closing Date, the Agent and
               --------------
     the Investors shall have received the executed legal opinion of Latham &
     Watkins, in form and substance reasonably acceptable to the Agent;

                    (ii)  On the Initial Closing Date, the Agent, the Lessee and
     the Investors shall have received the executed legal opinion of Morris,
     James, Hitchens &
<PAGE>

                                                                               6

     Williams LLP, special Delaware counsel to the Lessor and the Trust Company,
     in form and substance reasonably acceptable to the Agent; and

                    (iii) By the first Equipment Closing Date Agent, the Lessee,
     and the Investors shall have received the executed legal opinions of (a)
     Jackson Walker L.L.P., local counsel to the Lessee and the Guarantors in
     Texas and Louisiana, (b) Holland & Hart, local counsel to the Lessee and
     the Guarantors in Colorado and Wyoming, (c) Hinkle, Hensley, Shanor &
     Martin, L.L.P., local counsel to the Lessee and the Guarantors in New
     Mexico, (d) Mock, Schwabe, Waldo, Elder, Reeves & Bryant, local counsel to
     the Lessee and the Guarantors in Oklahoma, (e) Bryan Cave LLP, local
     counsel to the Lessee and the Guarantors in Kansas, (f) Balch & Bingham
     LLP, local counsel to the Lessee and the Guarantors in Alabama and (g) [ ],
     local counsel to the Lessee and the Guarantors in Arkansas, in form and
     substance reasonably acceptable to the Agent;

          (o)  Actions to Perfect Liens. The Agent shall have received evidence
               ------------------------
     in form and substance satisfactory to it that all filings, recordings,
     registrations and other actions, including the filing of duly executed
     Lender Financing Statements and Lessor Financing Statements, necessary or,
     in the opinion of the Agent or the Investors, desirable to perfect the
     Liens created by the Security Documents shall have been completed;

          (p)  Lien Searches. By the first Equipment Closing Date the Agent and
               -------------
     the Investors shall have received the results of recent search by a Person
     reasonably satisfactory to the Agent, of the Uniform Commercial Code,
     judgement and tax lien filings which may have been filed in each State in
     which any Equipment is located with respect to personal property of the
     Lessee, and the results of such search shall be satisfactory to the Agent
     and [both] Investors;

          (q)  Representations and Warranties. The representations and
               ------------------------------
     warranties of the Lessor, the Lessee, the Investors and the Guarantor
     contained herein and in each of the other Operative Agreements shall be
     true and correct in all material respects on and as of each Closing Date as
     if made on and as of each Closing Date (unless such representations and
     warranties specifically refer to another date);

          (r)  Performance of Operative Agreements. The parties hereto (other
               -----------------------------------
     than the Investors or the Lenders) shall have performed in all material
     respects their respective agreements contained herein and in the other
     Operative Agreements on or prior to each such Closing Date; and

          (s)  Default. There shall not have occurred and be continuing any
               -------
     Default or Event of Default and no Default or Event of Default will have
     occurred after giving effect to the Advance requested by such Requisition.

          6.2  Conditions to the Investors' and the Lenders' Obligations to
          -----------------------------------------------------------------
Make Advances to pay Equipment Acquisition Costs.
------------------------------------------------

          The obligations of the Investors to make the Investor Contribution, on
the first Equipment Closing Date, and of the Lenders to make Loans to the
Lessor, on an Equipment
<PAGE>

                                                                               7

Closing Date, for the purpose of providing funds to the Lessor necessary to
acquire a piece of Equipment are subject to the satisfaction or waiver of the
following conditions precedent:

          (a)  Requisition. The Agent and the Investors shall have received a
               -----------
fully executed counterpart of the Requisition dated as of the Equipment Closing
Date (but delivered at least three Business Days prior to the Equipment Closing
Date other than on the Initial Closing Date), appropriately completed;

          (b)  Bill of Sale. There shall have been delivered to the Lessor, a
               ------------
bill of sale (the "Bill of Sale"), in form and substance reasonably acceptable
                   ------------
to the Agent, with respect to each piece of Equipment being purchased on such
Equipment Closing Date, conveying title to such piece of Equipment to the
Lessor, subject only to the Permitted Exceptions;

          (c)  Title. The Lessor shall have good and valid title to the
               -----
Equipment being acquired on such Equipment Closing Date subject only to the
Permitted Exceptions, and the Lessor shall have granted the security interest
pursuant to the Security Agreement with respect to the Equipment.

          (d)  Lease Supplement. The Lessee shall have delivered a Lease
               ----------------
Supplement executed by the Lessee and the Lessor with respect to all Equipment
being acquired on such Equipment Closing Date to the Agent;

          (e)  Security Agreement Supplement. The Lessee shall have delivered a
               -----------------------------
supplement to the Security Agreement executed by the Lessor with respect to each
piece of Equipment being acquired on such Equipment Closing Date to the Agent
that is not already subject to the Security Agreement. The Lien of the Security
Agreement, as supplemented, shall conform to the representations and warranties
set forth in Section 7.5(f);

          (f)  Supplement to Assignment of Lease. The Lessor shall have
               ---------------------------------
delivered an original Supplement to Assignment of Lease executed by the Lessor
with respect to each piece of Equipment being acquired on such Equipment Closing
Date that is not already subject to the Assignment of Lease;

          (g)  Appraisal. The Agent and the Investors shall have received an
               ---------
Appraisal of the Equipment being acquired on such Equipment Closing Date and
such Appraisal shall be in form and substance acceptable to the Agent, both
Investors and the Lessor;

          (h)  Default. There shall not have occurred and be continuing any
               -------
Default or Event of Default and no Default or Event of Default will have
occurred after giving effect to the Advance requested by such Requisition;

          (i)  Local Opinions. With respect to each piece of Equipment being
               --------------
acquired on such Equipment Closing Date:

                    (i)   the Agent and the Investors shall have received the
     executed legal opinion of local counsel to the Lessee and the Guarantors in
     the state in which such Equipment is located, in form and substance
     reasonably acceptable to the Agent;
<PAGE>

                                                                               8

                    (ii)  the Agent, the Lessee and the Investors shall have
     received the executed legal opinion of special Delaware counsel to Lessor
     and the Trust Company, in form and substance reasonably acceptable to the
     Agent; and

                    (iii) the Agent and the Investors shall have received the
     executed legal opinion of counsel to Lessee and the Guarantors,
     substantially in form and substance reasonably acceptable to the Agent.

          SECTION 7.      REPRESENTATIONS AND WARRANTIES

          7.1  Representations and Warranties of the Investors on the Initial
          -------------------------------------------------------------------
Closing Date. Each of the Investors represents and warrants to each of the other
------------
parties hereto as of the Initial Closing Date as follows:

          (a)  Due Organization, etc. It is a duly organized and validly
               ---------------------
     existing corporation in good standing under the laws of its state of
     incorporation and has the power and authority to carry on its business as
     now conducted and to enter into and perform its obligations under this
     Agreement, each Operative Agreement to which it is a party and each other
     agreement, instrument and document executed and delivered by it on the
     Closing Date in connection with or as contemplated by each such Operative
     Agreement to which it is or will be a party.

          (b)  Authorization; No Conflict. The execution, delivery and
               --------------------------
     performance of each Operative Agreement to which it is a party has been
     duly authorized by all necessary action on its part and neither the
     execution and delivery thereof by the Investor, nor the consummation of the
     transactions contemplated thereby by the Investor, nor compliance by it
     with any of the terms and provisions thereof (i) requires or will require
     any approval of (which approval has not been obtained) the shareholders of,
     or approval or consent of any Person, (ii) contravenes or will contravene
     any Legal Requirement applicable to or binding on it as of the date hereof,
     (iii) does or will contravene or result in any breach of or constitute any
     default under, or result in the creation of any Lessor Lien upon the
     Equipment, its articles of incorporation or by-laws, any indenture,
     mortgage, chattel mortgage, deed of trust, conditional sales contract, bank
     loan or credit agreement or other agreement or instrument to which it or
     its properties may be bound or (iv) does or will require any Governmental
     Action by any Governmental Authority other than any Governmental Action
     required solely due to the nature of the Equipment.

          (c)  Enforceability, etc. Each Operative Agreement to which it is a
               --------------------
     party has been duly executed and delivered by it and constitutes, or upon
     execution and delivery will constitute, a legal, valid and binding
     obligation enforceable against it in accordance with the terms thereof
     except as enforceability may be limited by applicable bankruptcy,
     insolvency, reorganization, moratorium or similar laws affecting the
     enforcement of creditors' rights generally and by general equitable
     principles (whether enforcement is sought by proceedings in equity or at
     law).
<PAGE>

                                                                               9

          (d)  ERISA. The Investor is making the Investor Contribution
               -----
     contemplated to be made by it hereunder for its own account and with its
     general corporate assets in the ordinary course of its business, and no
     part of such amount constitutes (i) "plan assets" under 29 CFR 2510.3-101
     or (ii) assets of a "governmental plan" as defined under Section 3(32) of
     ERISA.

          (e)  Litigation. To its knowledge, no litigation, investigation or
               ----------
     proceeding of or before any arbitrator or Governmental Authority is pending
     or threatened by or against the Investor (a) with respect to any of the
     Operative Agreements or any of the transactions contemplated hereby or
     thereby, or (b) which would reasonably be expected to have a material
     adverse effect on the assets, liabilities, operations, business or
     financial condition of the Investor.

          (f)  Lessor Liens. The Equipment is free and clear of Lessor Liens
               ------------
     attributable to the Investors.

          7.2  Representations and Warranties of Lessor on the Initial Closing
          --------------------------------------------------------------------
Date. Lessor represents and warrants to each of the other parties hereto as of
----
the Initial Closing Date as follows:

          (a)  Due Organization, etc.  Lessor is a duly organized and validly
               ----------------------
     existing business trust in good standing under the laws of the State of
     Delaware and has the power and authority to carry on its business as now
     conducted and to enter into and perform its obligations under this
     Agreement, each Operative Agreement to which it is a party and each other
     agreement, instrument and document executed and delivered by it on the
     Closing Date in connection with or as contemplated by each such Operative
     Agreement.

          (b)  Authorization; No Conflict. The execution, delivery and
               --------------------------
     performance of each Operative Agreement to which it is a party has been
     duly authorized by all necessary action on its part and neither the
     execution and delivery thereof by the Lessor, nor the consummation of the
     transactions contemplated thereby by the Lessor, nor compliance by it with
     any of the terms and provisions thereof (i) requires or will require any
     approval of (which approval has not been obtained) any party or approval or
     consent of any Person, (ii) contravenes or will contravene any Legal
     Requirement applicable to or binding on it as of the date hereof, (iii)
     does or will contravene or result in any breach of or constitute any
     default under, or result in the creation of any Lessor Lien upon the
     Equipment or the Trust Agreement, any indenture, mortgage, chattel
     mortgage, deed of trust, conditional sales contract, bank loan or credit
     agreement or other agreement or instrument to which it or its properties
     may be bound or (iv) does or will require any Governmental Action by any
     Governmental Authority.

          (c)  Enforceability, etc.  Each Operative Agreement to which it is a
               --------------------
     party has been duly executed and delivered by it and constitutes, or upon
     execution and delivery will constitute, a legal, valid and binding
     obligation enforceable against it in accordance with the terms thereof
     except as enforceability may be limited by applicable bankruptcy,
     insolvency, reorganization, moratorium or similar laws affecting the
     enforcement of
<PAGE>

                                                                              10

     creditors' rights generally and by general equitable principles (whether
     enforcement is sought by proceedings in equity or at law).

          (d)  Litigation. No litigation, investigation or proceeding of or
               ----------
     before any arbitrator or Governmental Authority is pending or threatened by
     or against the Lessor (a) with respect to any of the Operative Agreements
     or any of the transactions contemplated hereby or thereby, or (b) which
     would reasonably be expected to have a material adverse effect on the
     assets, liabilities, operations, business or financial condition of the
     Lessor.

          (e)  Assignment. Lessor has not assigned or transferred any of its
               ----------
     right, title or interest in or under the Lease, any other Operative
     Agreement or any Equipment, except in accordance with the other Operative
     Agreements.

          (f)  No Default. The Lessor is not in default under or with respect to
               ----------
     any of its Contractual Obligations in any respect which would  reasonably
     be expected to have a material adverse effect on the assets, liabilities,
     operations, business or financial condition of the Lessor. No Default or
     Event of Default attributable to it has occurred and is continuing.

          (g)  Use of Proceeds. The proceeds of the Loans and the Investor
               ---------------
     Contribution shall be applied by the Lessor solely in accordance with the
     provisions of the Operative Agreements.

          (h)  Chief Place of Business. The Lessor's chief place of business,
               -----------------------
     chief executive office and office where the documents, accounts and records
     relating to the transactions contemplated by this Agreement and each other
     Operative Agreement are kept are located at Rodney Square North, 1100 North
     Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Trust
     Administration.

          (i)  Federal Reserve Regulations. The Lessor is not engaged
               ---------------------------
     principally in, and does not have as one of its most important activities,
     the business of extending credit for the purpose of purchasing or carrying
     any margin stock (within the meaning of Regulation U of the Board), and no
     part of the proceeds of the Loans will be used by it, directly or
     indirectly, to purchase or carry any margin stock or to extend credit to
     others for the purpose of purchasing or carrying any such margin stock or
     for any purpose that violates, or is inconsistent with, the provisions of
     Regulations of the Board, including but not limited to, T, U or X of the
     Board.

          (j)  Investment and Holding Company Status. The Lessor is not (i) an
               -------------------------------------
     "investment company" as defined in, or subject to regulation under the
     Investment Company Act of 1940 or (ii) a "holding company" as defined in,
     or subject to regulation under, the Public Utility Holding Company Act of
     1935.

          (k)  Securities Act. Neither the Lessor nor any Person authorized by
               --------------
     the Lessor to act on its behalf has offered or sold any interest in the
     Equipment or the Notes, or in any similar security or interest relating to
     the Equipment, or in any security the offering of which for the purposes of
     the Securities Act would be deemed to be part of the same
<PAGE>

                                                                              11

     offering as the offering of the aforementioned securities to, or solicited
     any offer to acquire any of the same from, any Person other than, in the
     case of the Notes, the Agent, and neither the Lessor nor any Person
     authorized by the Lessor to act on its behalf will take any action which
     would subject the issuance or sale of any interest in the Equipment or the
     Notes to the provisions of Section 5 of the Securities Act or require the
     qualification of any Operative Agreement under the Trust Indenture Act of
     1939, as amended.

          (l)  ERISA. The Lessor is making the Lessor Contribution contemplated
               -----
     to be made by it hereunder in the ordinary course of its business, and no
     part of such amount constitutes (i) "plan assets" under 29 CFR 2510.3-101
     or (ii) assets of a "governmental plan" as defined under Section 3(32) of
     ERISA.

          (m)  Lessor Liens. The Equipment is free and clear of all Lessor
               ------------
     Liens.

          7.3   Representations and Warranties of the Lessee on the Initial
          -----------------------------------------------------------------
Closing Date. Each of the representations and warranties of the Lessee set forth
------------
in Section 9 of the Guaranty are hereby incorporated by reference as if made by
Lessee pursuant to the terms of this Agreement and shall for all purposes be
deemed to have been made by Lessee hereunder on the Initial Closing Date.

          7.4  Representations and Warranties of the Trust Company on the
          ---------------------------------------------------------------
Initial Closing Date. The Trust Company represents and warrants to each of the
--------------------
other parties hereto that:

          (a)  Due Organization, etc. It is a banking corporation duly organized
               ----------------------
     and validly existing and in good standing under the laws of the State of
     Delaware and has the power and authority to enter into and perform its
     obligations under the Trust Agreement and has the corporate power and
     authority to act as the trustee under the Trust Agreement and to enter into
     and perform the obligations under each of the other Operative Agreements to
     which Trust Company or the Trust, as the case may be, is or will be a party
     and each other agreement, instrument and document to be executed and
     delivered by it on or before the Initial Closing Date in connection with or
     as contemplated by each such Operative Agreement to which the Trust Company
     or the Trust, as the case may be, is or will be a party.

          (b)  Authorization; No Conflict. The execution, delivery and
               --------------------------
     performance of each Operative Agreement to which it is a party, either in
     its individual capacity or (assuming due authorization, execution and
     delivery of the Trust Agreement by both Investors) as the Trust, as the
     case may be, has been duly authorized by all necessary action on its part
     and neither the execution and delivery thereof, nor the consummation of the
     transactions contemplated thereby, nor compliance by it with any of the
     terms and provisions thereof (i) does or will require any approval or
     consent of any Person (ii) does or will contravene any current United
     States federal law, governmental rule or regulation relating to its banking
     or trust powers, (iii) does or will contravene or result in any breach of
     or constitute any default under, or result in the creation of any Lien upon
     any of its property under, its charter or by-laws, or any indenture,
     mortgage, chattel mortgage, deed of trust,
<PAGE>

                                                                              12

     conditional sales contract, bank loan or credit agreement or other
     agreement or instrument to which it is a party or by which it or its
     properties may be bound or affected or (iv) does or will require any
     Governmental Action by any Governmental Authority of the State of Delaware
     or the United States governing its banking or trust powers.

          (c)  Trust Agreement Enforceability, etc. The Trust Agreement and,
               ------------------------------------
     assuming the Trust Agreement is the legal, valid and binding obligation of
     both Investors, each other Operative Agreement to which Trust Company or
     the Trust, as the case may be, is a party have been, or on or before the
     Closing Date will be, duly executed and delivered by Trust Company or the
     Trust, as the case may be, and the Trust Agreement and each such other
     Operative Agreement to the extent entered into by the Trust Company
     constitutes, or upon execution and delivery will constitute, a legal, valid
     and binding obligation enforceable against Trust Company in accordance with
     the terms thereof except as enforceability may be limited by applicable
     bankruptcy, insolvency, reorganization, moratorium or similar laws
     affecting the enforcement of creditors' rights generally and by general
     equitable principles (whether enforcement is sought by proceedings in
     equity or at law).

          (d)  Litigation. No litigation, investigation or proceeding of or
               ----------
     before any arbitrator or Governmental Authority is pending or threatened by
     or against the Trust Company with respect to any of the Operative
     Agreements or any of the transactions contemplated hereby or thereby.

          (e)  Liens. The Trust Estate is free and clear of Lessor Liens
               -----
     attributable to the Trust Company, and there are no Liens affecting the
     title of the Trust to the Equipment or resulting from any act or claim
     against the Trust Company arising out of any event or condition not related
     to the ownership, leasing use or operation of the Equipment or any other
     transaction contemplated by this Agreement or any of the other Operative
     Agreements, including any Lien resulting from the nonpayment by the Trust
     Company of any Taxes imposed or measured by its net income.

          7.5  Representations and Warranties of the Lessee on Equipment
          --------------------------------------------------------------
Closing Dates. The Lessee hereby represents and warrants as of each Equipment
-------------
Closing Date as follows:

          (a)  Representations and Warranties. The representations and
               ------------------------------
warranties of the Lessee and the Guarantors set forth herein and in each of the
other Operative Agreements are true and correct in all material respects on and
as of such Equipment Closing Date as if made on and as of such Equipment Closing
Date (unless such representations and warranties specifically refer to another
date). The Lessee and each Guarantor are in compliance in all material respects
with their respective obligations under the Operative Agreements and there
exists no Lease Default or Lease Event of Default.

          (b)  No Default. No Default or Event of Default attributable to Lessee
               ----------
will occur as a result of, or after giving effect to, the Advance requested by
the Requisition on such Equipment Closing Date.
<PAGE>

                                                                              13

          (c)  Authorization by the Lessee. The execution and delivery of each
               ---------------------------
Lease Supplement and other Operative Agreement delivered by the Lessee on such
Equipment Closing Date and the performance of the obligations of the Lessee
under each such Lease Supplement and other Operative Agreements have been duly
authorized by all requisite corporate action of the Lessee.

          (d)  Execution and Delivery by the Lessee. Each Lease Supplement and
               ------------------------------------
other Operative Agreement delivered on such Equipment Closing Date by the Lessee
have been duly executed and delivered by the Lessee.

          (e)  Valid and Binding Obligations. Each Lease Supplement and other
               -----------------------------
Operative Agreement delivered by the Lessee on such Equipment Closing Date is a
legal, valid and binding obligation of the Lessee, enforceable against the
Lessee in accordance with its respective terms except as enforceability may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium or
similar laws affecting the enforcement of creditors' rights generally and by
general equitable principles (whether enforcement is sought by proceedings in
equity or at law).

          (f)  Filing of UCC Financing Statements and Priority of Liens. The UCC
               --------------------------------------------------------
Financing Statements with respect to the Equipment being acquired on such
Equipment Closing Date have been fully executed and delivered to the Agent on
the Equipment Closing Date or have been filed with the appropriate Governmental
Authorities so that the liens created pursuant to each of the Operative
Agreements constitutes a valid and perfected security interest on each
applicable piece of Equipment located thereon in an amount not less than the
Equipment Cost with respect to such Equipment subject, in all cases, to the
Lessee's right to relocate the Equipment.  On such Equipment Closing Date, there
are no security interests on the applicable Equipment other than the liens
created pursuant to each of the Operative Agreements and other than Permitted
Liens.

          (g)  Insurance Coverage. The Lessee maintains insurance coverage for
               ------------------
each piece of Equipment being acquired by the Lessor on such Equipment Closing
Date which meets the requirements of Section 14.1 of the Lease and all of such
coverage is in full force and effect.

          (h)  Legal Requirements. Each piece of Equipment being acquired by the
               ------------------
Lessor on such Equipment Closing Date complies in all material respects with all
Legal Requirements (including all zoning and land use laws and Environmental
Laws).

          (i)  Consents, etc. All material consents, licenses and permits
               -------------
required by all Legal Requirements for operation of each piece of Equipment
being acquired on such Equipment Closing Date have been obtained and are in full
force and effect.

          (j)  Environmental Matters.
               ---------------------

                    (i)   The Equipment being acquired on such Equipment Closing
     Date does not contain any Hazardous Substances in amounts or concentrations
     which (i) constitute a material violation of, or (ii) would reasonably be
     expected to give rise to material liability under, any Environmental Law.
<PAGE>

                                                                              14

                    (ii)  The Equipment being acquired on such Equipment Closing
     Date is in compliance in all material respects with all applicable
     Environmental Laws.

                    (iii) Neither the Lessee nor any of its Subsidiaries has
     received any notice of violation, alleged violation, non-compliance,
     liability or potential liability regarding any material non-compliance with
     Environmental Laws with regard to the Equipment being acquired on such
     Equipment Closing Date, nor does the Lessee have knowledge that any such
     notice will be received or is being threatened.

                    (iv)  Hazardous Substances have not been transported or
     discharged from the Equipment being acquired on such Equipment Closing Date
     so as to create a material violation of any Environmental Law, nor have any
     Hazardous Substances been generated, treated, or used with respect to the
     Equipment being acquired on such Equipment Closing Date so as to create a
     material violation of any applicable Environmental Law.

                    (v)   No judicial proceeding or governmental or
     administrative action is pending or, to the best knowledge of the Lessee,
     threatened, under any Environmental Law to which the Lessee or any
     Subsidiary is or, to Lessee's knowledge, will be named as a party with
     respect to the Equipment being acquired on such Equipment Closing Date, nor
     are there any consent decrees or other decrees, consent orders,
     administrative orders or other orders, or other administrative or judicial
     requirements outstanding under any Environmental Law with respect to the
     Equipment being acquired on such Equipment Closing Date.

                    (vi)  There has been no release or threat of release of
     Hazardous Substances at or from the Equipment being acquired on such
     Equipment Closing Date, or arising from or related to the operations of the
     Lessee or any Subsidiary in connection with the Equipment being acquired on
     such Equipment Closing Date, in violation of or in amounts or in a manner
     that would reasonably be expected to give rise to any material liability
     under any Environmental Laws.

          (k)  Location of the Equipment. Each piece of Equipment being acquired
               -------------------------
on such Equipment Closing Date is located within the United States or on lands
covered by leases under the exclusive jurisdiction of the United States of
America pursuant to the Outer Continental Shelf Lands Act, as amended, 43 U.S.C.
(S) (S) 1331, et seq. (1986).
              -- ---

          (l)  Conditions Precedent in Operative Agreements. All conditions
               --------------------------------------------
precedent contained in this Agreement and in the other Operative Agreements
required to be satisfied by Lessee relating to the acquisition of a piece of
Equipment by the Lessor have been satisfied in full or waived by the Agent and
the Lessee.

          (m)  Hart-Scott-Rodino. The acquisition of the Equipment being
               -----------------
acquired on such Equipment Closing Date does not conflict with, violate or
require the consent of, any Governmental Authority under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended.
<PAGE>

                                                                              15

          7.6  Representations and Warranties of the Lessor on Equipment
               ---------------------------------------------------------
Closing Dates.  The Lessor hereby represents and warrants as of each Equipment
-------------
Closing Date as follows:

          (a)  Representations and Warranties; No Default.  The representations
               ------------------------------------------
and warranties of the Lessor set forth herein and in each of the other Operative
Agreements are true and correct in all material respects on and as of such
Equipment Closing Date as if made on and as of such Equipment Closing Date
(unless such representations and warranties specifically refer to another date).
The Lessor is in compliance with its respective obligations under the Operative
Agreements and there exists no Default or Event of Default under any of the
Operative Agreements.  No Default or Event of Default attributable to the Lessor
will occur as a result of, or after giving effect to, the Advance requested by
the Requisition on such Equipment Closing Date.

          (b)  Authorization by the Lessor.  The execution and delivery of each
               ---------------------------
Lease Supplement, Security Agreement Supplement, Supplement to Assignment of
Lease and other Operative Agreement delivered by the Lessor on such Equipment
Closing Date and the performance of the obligations of the Lessor under each
such Lease Supplement, Security Agreement Supplement, Supplement to the
Assignment of Lease and other Operative Agreement have been duly authorized by
all requisite action of the Lessor.

          (c)  Execution and Delivery by the Lessor.  Each Lease Supplement,
               ------------------------------------
Security Agreement Supplement, Supplement to the Assignment of Lease and other
Operative Agreement delivered by the Lessor on such Equipment Closing Date have
been duly executed and delivered by the Lessor.

          (d)  Valid and Binding Obligations.  Each Lease Supplement, Security
               -----------------------------
Agreement Supplement, Supplement to the Assignment of Lease and other Operative
Agreement delivered by the Lessor on such Equipment Closing Date is a legal,
valid and binding obligation of the Lessor, enforceable against the Lessor in
accordance with its terms except as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the
enforcement of creditors' rights generally and by general equitable principles
(whether enforcement is sought by proceedings in equity or at law).

          (e)  Conditions Precedent in Operative Agreements.  All conditions
               --------------------------------------------
precedent contained in this Agreement and in the other Operative Agreements to
be satisfied by the Lessor relating to the acquisition of a piece of Equipment
by the Lessor have been satisfied in full.

          SECTION 8.  PAYMENT OF CERTAIN EXPENSES

          Lessee agrees, for the benefit of the Investors, the Trust Company,
the Lessor, the Agent and each of the Lenders, to:

          8.1  Transaction Expenses.  (a) On the Initial Closing Date, pay, or
               --------------------
cause to be paid, all reasonable fees, expenses and disbursements of one counsel
to each of the Lessor, the Trust Company, the Agent, and the Investors in
connection with the transactions contemplated by the Operative Agreements and
incurred in connection with such Initial Closing Date, including all Transaction
Expenses, and all other reasonable expenses in connection with such
<PAGE>

                                                                              16

Initial Closing Date, including all expenses relating to all fees, taxes and
expenses for the recording, registration and filing of documents.

          (b)  On each Equipment Closing Date, pay, or cause to be paid, all
reasonable fees, expenses and disbursements of each of the Lessor's, the Trust
Company's, the Agent's and the Investors' counsel in connection with the
transactions contemplated by the Operative Agreements and incurred in connection
with such Equipment Closing Date, including all Transaction Expenses arising
from such Equipment Closing Date, and all other reasonable expenses in
connection with such Equipment Closing Date, including all expenses relating to
each Appraisal, and all fees, taxes and expenses for the recording, registration
and filing of documents.

          8.2  Brokers' Fees and Stamp Taxes.  Pay or cause to be paid brokers'
               -----------------------------
fees with respect to brokers retained by or with the prior written consent of
Lessee and any and all stamp, transfer and other similar taxes, fees and
excises, if any, including any interest and penalties, which are payable in
connection with the transactions contemplated by this Agreement and the other
Operative Agreements.

          8.3  Certain Fees and Expenses.  Pay or cause to be paid (i) the
               -------------------------
initial and annual Trust Company's fee and all expenses of the Trust Company and
any necessary co-trustees (including reasonable counsel fees and expenses) or
any successor owner trustee, for acting as trustee under the Trust Agreement,
(ii) all costs and expenses incurred by the Lessee, the Agent, the Investors,
the Trust Company or the Lessor in entering into any future amendments or
supplements with respect to any of the Operative Agreements, whether or not such
amendments or supplements are ultimately entered into, or giving or withholding
of waivers of consents hereto or thereto, which have been requested by the
Lessee, and (iii) all costs and expenses incurred by the Lessor, the Lessee, the
Investors, the Trust Company or the Agent in connection with any purchase of any
Equipment by the Lessee pursuant to Section 20 of the Lease.

          8.4  Credit Agreement and Related Obligations.  (a) Pay, on or prior
               ----------------------------------------
to the due date thereof, all costs, fees, indemnities, expenses and other
amounts (other than principal and interest on the Loans, but including breakage
costs and interest on overdue amounts pursuant to Section 2.14 of the Credit
Agreement or otherwise) required to be paid by the Lessor under any Operative
Agreement.

          (b)  Pay to the Agent all fees specified in the Fee Letter at the time
and in the manner required by the Fee Letter, which fees may not be paid by
using the proceeds of the Loans or the Investor Contribution.

          (c)  Pay to the Lessor promptly after receipt of notice therefor any
additional amounts payable to the Investors in respect of the Investor
Contribution under Sections 2.13, 2.14 and 2.15 of the Credit Agreement (it
being agreed that the Investors are, for purposes of this Agreement,
beneficiaries of the provisions of Sections 2.13, 2.14 and 2.15 of the Credit
Agreement).
<PAGE>

                                                                              17

          8.5  Commitment Fees.  (a) Pay to the Agent for the account of each
               ---------------
Lender the Commitment Fee on each Commitment Fee Payment Date.

          (b)  Pay to the Investors the Investor Commitment Fee on each
Commitment Fee Payment Date in accordance with each investor's pro rata portion
of the Available Investor Commitment.

          (c)  The Commitment Fee and the Investor Commitment Fee shall be
calculated on the basis of a 365- (or 366-, as the case may be) day year for the
actual days elapsed. If all or a portion of the Commitment Fee or the Investor
Commitment Fee shall not be paid when due, such overdue amount shall bear
interest, payable by the Lessee on demand, at a rate per annum equal to the
applicable Overdue Rate, from the date of such non-payment until such amount is
paid in full (as well after as before judgment).

          8.6  Overdue Rate.  If all or a portion of the Investor Yield, the
               ------------
Investor Contribution or any other amount owed to the Investors shall not be
paid when due, such overdue amount shall bear interest, payable on demand, at a
rate per annum equal to the applicable Overdue Rate, from the date of such non-
payment until such amount is paid in full (as well after as before judgment).

          8.7  Continuous Perfection of Security Interests.  If the Officer's
               -------------------------------------------
Certificate required to be delivered by Lessee pursuant to Section 10.3(b) of
the Lease shall indicate that any of the Equipment has been relocated, then
Lessee will provide to the Agent, together with the Officer's Certificate,
evidence in form and substance satisfactory to Agent that all filings,
recordings, registrations and other actions, including the filing of duly
executed Lender Financing Statements and Lessor Financing Statements, necessary
or, in the reasonable opinion of the Agent, desirable to perfect the Liens
granted by the Security Documents shall have been completed.

          8.8  Oklahoma Equipment Subleases.  With respect to any leases or
               ----------------------------
other agreements entered into by Lessee with respect to Equipment located in the
State of Oklahoma ("Oklahoma Subleases"), Lessee shall, by February 1, 2001 (or
                    ------------------
within 90 days of the date any Oklahoma Sublease is subsequently entered into),
undertake to file, in accordance with 60 Okla. Stat. 1991 (S) 319, et. seq., the
original Oklahoma Sublease instrument or a true copy thereof in the chattel
mortgage records of the office of the county clerk in the county where the
Equipment is located and provide Agent with reasonably satisfactory evidence of
Lessee's compliance with this Section 8.8.

          SECTION 9. OTHER COVENANTS AND AGREEMENTS

          9.1  Covenants of the Trust and the Investors and the Trust Company.
               --------------------------------------------------------------
Each of the parties hereby agrees that so long as this Agreement is in effect:

          (a)  Discharge of Liens.  Each of the Investors, the Trust and the
               ------------------
Trust Company, in its individual capacity, will not create or permit to exist at
any time, and will, at its own cost and expense, promptly take such action as
may be necessary duly to discharge, or to cause to be discharged, all Lessor
Liens on the Equipment attributable to it or any of its Affiliates; provided,
                                                                    --------
<PAGE>

                                                                              18

however, that the Investor, the Trust and the Trust Company shall not be
-------
required to so discharge any such Lessor Lien while the same is being contested
in good faith by appropriate proceedings diligently prosecuted so long as such
proceedings shall not cause Lessee or any other party hereto to be in default
under any of the Operative Documents and shall not involve any material danger
of impairment of the Liens of the Security Documents or of the sale, forfeiture
or loss of, and shall not materially interfere with the use or disposition of,
the Equipment or title thereto or any interest therein or the payment of Rent.

          (b)  Trust Agreement.  Without prejudice to any right under the Trust
               ---------------
Agreement of the Trust Company to resign, or the Investors' right under the
Trust Agreement to remove the institution acting as Trustee, each of the
Investors and the Trust Company hereby agrees with the Lessee and the Agent (i)
not to terminate or revoke the trust created by the Trust Agreement except as
permitted by the Trust Agreement, (ii) not to amend, supplement, terminate or
revoke or otherwise modify any provision of the Trust Agreement without the
prior written consent of any party adversely affected by such amendment and in
any event with prior notice to the Lessee and (iii) to comply with all of the
terms of the Trust Agreement, the nonperformance of which would adversely affect
such party.  The Trust Company will provide each party hereto with a copy of any
amendment to the Trust Agreement within thirty (30) days after such amendment is
effective.

          (c)  Successor Trust Company.  The Trust Company or any successor may
               -----------------------
resign or be removed by both Investors as owner trustee, a successor owner
trustee may be appointed, and a corporation may become the owner trustee under
the Trust Agreement, only in accordance with the provisions of Section 8 of the
Trust Agreement and with the consent of the Lessee, which consent shall not be
unreasonably withheld or delayed.

          (d)  Indebtedness; Other Business.  The Trust shall not contract for,
               ----------------------------
create, incur or assume any indebtedness, or enter into any business or other
activity, or hold title to any assets other than pursuant to or under the
Operative Agreements.

          (e)  No Violation.  Neither the Investors nor the Trust Company will
               ------------
instruct the Trust to take any action in violation of the terms of any Operative
Agreement.

          (f)  No Voluntary Bankruptcy.  Neither the Investors nor the Trust
               -----------------------
shall (i) commence, consent to, approve of or acquiesce to any case, proceeding
or other action under any existing or future law of any jurisdiction, domestic
or foreign, relating to bankruptcy, insolvency, reorganization, arrangement,
winding-up, liquidation, dissolution, composition or other relief with respect
to it or its debts, or (ii) seek appointment of a receiver, trustee, custodian
or other similar official for it or for all or any substantial part of its
assets, or make a general assignment for the benefit of its creditors; and
neither the Investors nor the Trust shall take any action in furtherance of, or
indicating its consent to, approval of, or acquiescence in, any of the acts set
forth in this paragraph.

          (g)  Change of Chief Place of Business.  The Trust shall give prompt
               ---------------------------------
prior notice to the Lessee and the Agent if the Trust's chief place of business
or chief executive office, or the office where the records concerning the
accounts or contract rights relating to the Equipment are
<PAGE>

                                                                              19

kept, shall cease to be located at the address set forth in Section 7.2(h) or if
it shall change its name.

          (h)  Loan Documents.  Provided that no Lease Event of Default is
               --------------
continuing, none of the Lenders, the Lessor, the Agent and the Investors shall
consent to or permit any material amendment, supplement, waiver or other
modification of the terms and provisions of the Credit Agreement, the Notes or
the Security Documents which would reasonably be expected to adversely impact
the Lessee, in each case without the prior written consent of the Lessee.

          (i)  Disposition of Assets.  The Trust shall not convey, sell, lease,
               ---------------------
assign, transfer or otherwise dispose of any of its property, business or
assets, whether now owned or hereafter acquired, except to the extent expressly
authorized by the Operative Agreements.

          (j)  Compliance with Operative Agreements.  It shall at all times
               ------------------------------------
observe and perform all of the covenants, conditions and obligations required to
be performed by it under each Operative Agreement to which it is a party.

          (k)  Tax Reporting.  No party hereto other than the Lessee will file
               -------------
(or permit to be filed) any tax return taking the position that such party (or
its affiliates) is the owner of the Equipment for federal, state or local tax
purposes.

          9.2  Repayment of Certain Amounts on Maturity Date.  The Investors,
               ---------------------------------------------
the Lessor and the Agent hereby agree that if (i) on the Maturity Date (after
giving effect to all payments made by the Lessee under the Lease and the
application of all sales proceeds pursuant to Section 8 of the Credit Agreement)
there remains any outstanding principal or accrued and unpaid interest under the
Tranche B Notes (the aggregate amount of such outstanding principal, the
"Tranche B Deficit") and (ii) during the Marketing Period the Lessor or the
 -----------------
Investors have received any Marketing Period Equity Return, then on the Maturity
Date the Investors shall ratably pay to the Agent an amount up to the amount of
the Tranche B Deficit to be applied pursuant to Section 8 of the Credit
Agreement, but in no event greater than the Marketing Period Equity Return
received by both Investors.

          9.3  Amendment of Certain Documents.  The Agent, for itself and on
               ------------------------------
behalf of the Lenders, hereby agrees for the benefit of the Trust and the
Investors that it will not amend, alter or otherwise modify, or consent to any
amendment, alteration or modification of, the Lease (including the definitions
of any terms used in such document) without the prior written consent of the
Trust and both Investors, as the case may be, if such amendment, alteration or
modification would adversely affect the interests of the Trust or the Investors.
Provisions requiring consent, include any amendment, alteration or modification
that would release the Lessee from any of its obligations in respect of the
payment of Basic Rent, Supplemental Rent, Termination Value, Maximum Residual
Guarantee Amount or the Purchase Option Price or any other payments in respect
of the Equipment as set forth in the Lease, or amend the provisions of Section 8
of the Credit Agreement, or reduce the amount of, or change the time or manner
of payment of, obligations of the Lessee as set forth in the Lease, or create or
impose any obligation on the part of the Trust or the Investors under the Lease,
or extend or shorten the duration of the Term, or modify the provisions of this
Section 9.3.
<PAGE>

                                                                              20

          9.4  Proceeds of Casualty.  Subject to Section 15 of the Lease, the
               --------------------
Lessor and the Investors agree, for the benefit of the Agent and the Lenders,
that if at any time either the Lessor or the either of the Investors receives
any proceeds as a result, directly or indirectly, of any Casualty or
Condemnation with respect to the Equipment which the Lessor is entitled to
retain and hold in accordance with the terms of the Lease, the Lessor and both
Investors agree that they will promptly deposit such amounts in an account with
the Agent.  The Lessor and the Investors also agree that they will execute and
deliver such documents and instruments as the Agent may request in order to
grant the Agent, for the benefit of the Lenders, a valid and perfected, first
priority security interest in such proceeds.

          9.5  Intercreditor Agreement.  The Lessee, the Agent, the Lenders, the
               -----------------------
Investors and the Lessor hereby agree and confirm that the provisions of Section
8 of the Credit Agreement are intended to constitute an intercreditor agreement
and a subordination agreement under Section 510 of the Bankruptcy Code or any
similar provision therein.

          9.6  Appraisal.  The Lessee agrees that prior to any Replacement
               ---------
Equipment Closing Date, and upon the written request of the Required Lenders or
both Investors, the Lessee shall provide to the Agent and the Investors an
Appraisal of the Replacement Equipment, such Appraisal in form and substance
satisfactory to the Agent, both Investors and the Required Lenders; provided,
                                                                    --------
the Lessee is not required to provide more than one such Appraisal in any
twelve-month period; provided further, that notwithstanding anything in this
                     -------- -------
Section 9.6 to the contrary, if the aggregate value of (i) the Replacement
Equipment relating to a prospective Replacement Equipment Closing Date and (ii)
any Replacement Equipment acquired subsequent to the latest Replacement
Equipment Closing Date relating to which the Lessee delivered an Appraisal, is
equal to or greater than 10% of the aggregate value of the Equipment, then the
Lessee shall provide to the Agent, the Investors and the Lenders an Appraisal of
all Replacement Equipment acquired or to be acquired since the latest Appraisal,
such Appraisal in form and substance satisfactory to the Agent, the Investors
and the Required Lenders and including valuations of the Equipment replaced or
being replaced by the Replacement Equipment that is the subject of such
Appraisal.  For purposes of this Section 9.6, the satisfaction of any Lender
will be implied if such Lender does not inform the Agent, within ten Business
Days after receiving any Replacement Equipment Appraisal, that it is not
satisfied with such Appraisal.

          SECTION 10. CREDIT AGREEMENT

          10.1 Lessee's Credit Agreement Rights.  Notwithstanding anything to
               --------------------------------
the contrary contained in the Credit Agreement, the Agent, the Lenders, the
Lessee, the Investors and the Trust hereby agree that:

          (a)  the Lessee shall have the right to give the notices referred to
in Section 2.2 of the Credit Agreement;

          (b)  the Lessee shall have the right to convert or continue Loans in
accordance with Section 2.5 of the Credit Agreement;
<PAGE>

                                                                              21

          (c)  the Lessee shall receive copies of all notices delivered to the
Lessor under the Credit Agreement and the other Operative Agreements and such
notices shall not be effective until received by Lessee;

          (d)  the Lessee shall have the right to select Interest Periods in
accordance with the terms of the Credit Agreement;

          (e)  the Lessee shall have the right to give notice of prepayment of
the Loans in accordance with the Credit Agreement, provided that if the Lessee
shall give notice of prepayment of the Loans, the Lessee shall prepay a pro rata
portion of the Investor Contribution;

          (f)  the Lessee shall have the right to cure, to the extent
susceptible to a cure, any Credit Agreement Default or Credit Agreement Event of
Default of the Lessor;

          (g)  the Lessee shall have the right to approve any successor Agent
pursuant to Section 7.9 of the Credit Agreement;

          (h)  the Lessee shall have the right, on behalf of the Lessor, to
select any Person or Persons (including the Lessee) to whom funds may be paid at
the discretion of the Lessor in accordance with Sections 8.1 and 8.2 of the
Credit Agreement;

          (i)  the Lessee shall have the right to consent to any assignment by a
Lender, if required pursuant to Section 9.5 of the Credit Agreement;

          (j)  the Lessee shall have the right to request that another lending
office be designated pursuant to Section 2.14(a) of the Credit Agreement;

          (k)  Lessee shall have the right to cause a Lender to assign its
rights and delegate its obligation under the Credit Agreement pursuant to
Section 2.15 of the Credit Agreement;

          (l)  the Lessee shall have the obligation to notify the Agent of the
amounts or information specified in Section 5.8 of the Credit Agreement; and

          (m)  without limiting the foregoing clauses (a) through (l), and in
addition thereto, (x) the Trust shall not exercise any right under the Credit
Agreement without giving the Lessee at least fifteen (15) Business Days' prior
written notice (or such shorter period as may be required but in no case less
than five (5) Business Days) and, following such notice, the Trust shall take
such action, or forbear from taking such action, as the Lessee shall direct and
(y) the Lessee shall have the right to exercise any other right of the Trust
under the Credit Agreement upon not less than two (2) Business Days' prior
written notice from the Lessee to the Trust. Notwithstanding the foregoing, both
Investors shall retain the exclusive right to direct the Trust with respect to
the exercise of the Excepted Rights.

          SECTION 11. TRANSFER OF INTEREST

          11.1 Restrictions on Transfer.  Neither of the Investors may, directly
               ------------------------
or indirectly, assign, convey or otherwise transfer any of its right,
title or interest in or to the Trust
<PAGE>

                                                                              22

Estate or the Trust Agreement nor shall there be any change in control of either
of the Investors without the consent of the Agent and the Lessee, which consent
shall not be unreasonably withheld or delayed. Any transfer by either of the
Investors as above provided, shall be effected pursuant to an agreement in form
and substance reasonably satisfactory to the Agent, the Investors, the Trust
Company, the Lessee and their respective counsel.

     11.2   Effect of Transfer.  From and after any transfer effected in
     -------------------------
accordance with this Section 11, the transferor shall be released, to the extent
of such transfer, from its liability hereunder and under the other documents to
which it is a party in respect of obligations to be performed on or after the
date of such transfer; provided, however, that any transferor Investor shall
                       --------  -------
remain liable under the Trust Agreement to the extent that the transferee
Investor shall not have assumed the obligations of the transferor Investor
thereunder.  Upon any transfer by either of the Investors as above provided, any
such transferee shall assume the obligations of the same entity, and the Lessor
or Investor, as the case may be, and shall be deemed the "same entity", as the
case may be, for all purposes of such documents and each reference herein to the
transferor shall thereafter be deemed a reference to such transferee for all
purposes, except as provided in the preceding sentence.  Notwithstanding any
transfer of all or a portion of the transferor's interest as provided in this
Section 11, the transferor shall be entitled to all benefits accrued and all
rights vested prior to such transfer including rights to indemnification under
any such document.

     SECTION 12. INDEMNIFICATION

     12.1  General Indemnity.  The Lessee hereby assumes liability for and
     -----------------------
agrees to defend, indemnify and hold harmless each Indemnified Person on an
After Tax Basis from and against any Claims which may be imposed on, incurred by
or asserted against an Indemnified Person in any way relating to or arising out
of (a) the financing, refinancing, purchase, acceptance, rejection, ownership,
design, delivery, acceptance, nondelivery, leasing, subleasing, possession, use,
operation, repair, modification, transportation, condition, sale, return,
repossession (whether by summary proceedings or otherwise), or any other
disposition of the Equipment or any part thereof(b) any latent or other defects
in any piece of Equipment whether or not discoverable by an Indemnified Person
or the Lessee; (c) a violation of Environmental Laws, Environmental Claims or
other loss of or damage relating to the Equipment; (d) the Operative Agreements,
or any transaction contemplated thereby; (e) any breach by the Lessee of any of
its representations or warranties under the Operative Agreements or failure by
the Lessee to perform or observe any covenant or agreement to be performed by it
under any of the Operative Agreements; and (f) personal injury, death or
property damage relating to the Equipment, including Claims based on strict
liability in tort; but in any event excluding (v) Claims to the extent such
Claims arise solely out of the gross negligence or willful misconduct of such
Indemnified Person, (w) Claims to the extent such Claims arise solely out of
events occurring after Lessee's discharge of all its obligations under the Lease
or (x) any Taxes including any Claim (or any portion of a Claim) made upon an
Indemnified Person by a third party that at its origin is based upon a Tax
(other than amounts necessary to make any payments hereunder on an After Tax
Basis, where the Lessee is otherwise specifically required to make such payments
on an After Tax Basis), (y) legal proceedings commenced against an Indemnified
Person by any security holder or creditor solely in its capacity as such, or (z)
legal proceedings
<PAGE>

                                                                              23

commenced against an Indemnified Person by any other Indemnified Person or by
any transferee of an Indemnified Person. The Lessee shall be entitled to
control, and shall assume full responsibility for the defense of any Claim;
provided, however, that the Trust, the Trust Company, the Agent and the
--------  -------
Investors named in such Claim, may each retain separate counsel at the expense
of the Lessee in the event of and to the extent of an actual conflict or a
potential conflict. The Lessee and each Indemnified Person agree to give each
other prompt written notice of any Claim hereby indemnified against but the
giving of any such notice by an Indemnified Person shall not be a condition to
the Lessee's obligations under this Section 12.1, except to the extent failure
to give such notice materially prejudices Lessee's rights hereunder or with
respect to the defense or settlement of such Claim. After an Indemnified Person
has been fully indemnified for a Claim pursuant to this Section 12.1, and so
long as no Lease Event of Default shall have occurred and be continuing, the
Lessee shall be subrogated to any right of such Indemnified Person with respect
to such Claim. None of the Indemnified Persons shall settle a Claim without the
prior written consent of the Lessee, which consent shall not be unreasonably
withheld or delayed.

     12.2   General Tax Indemnity.  (a)  The Lessee shall pay and assume
     ----------------------------
liability for, and does hereby agree to indemnify, protect and defend the
Equipment and all Tax Indemnitees, and hold them harmless against, all
Impositions on an After Tax Basis.

     (b) Provided that no Default or Event of Default has occurred and is
continuing, if any Tax Indemnitee obtains a refund or a reduction in a liability
(but only if such reduction relates to a Tax not otherwise indemnifiable
hereunder and has not been taken into account in determining the amount of a
payment on an After Tax Basis) as a result of any Imposition paid or reimbursed
by the Lessee (in whole or in part), such Tax Indemnitee shall promptly pay to
the Lessee the lesser of (x) the amount of such refund or reduction in liability
and (y) the amount previously so paid or advanced by the Lessee, in each case
net of reasonable expenses not already paid or reimbursed by the Lessee.

     (c) (i) Subject to the terms of Section 12.2(g), the Lessee shall pay
or cause to be paid all Impositions directly to the taxing authorities where
feasible and otherwise to the Tax Indemnitee, as appropriate, and the Lessee
shall at its own expense, upon such Tax Indemnitee's reasonable request, furnish
to such Tax Indemnitee copies of official receipts or other satisfactory proof
evidencing such payment.

             (ii) In the case of Impositions for which no contest is conducted
pursuant to Section 12.2(g) and which the Lessee pays directly to the taxing
authorities, the Lessee shall pay such Impositions prior to the latest time
permitted by the relevant taxing authority for timely payment. In the case of
Impositions for which the Lessee reimburses a Tax Indemnitee, the Lessee shall
do so within twenty (20) days after receipt by the Lessee of demand by such Tax
Indemnitee describing in reasonable detail the nature of the Imposition and the
basis for the demand (including the computation of the amount payable), but in
no event shall the Lessee be required to pay such reimbursement prior to 15 days
before the latest time permitted by the relevant taxing authority for timely
payment. In the case of Impositions for which a contest is conducted pursuant to
Section 12.2(g), the Lessee shall pay such Impositions or reimburse such Tax
Indemnitee for such Impositions, to the extent not previously paid or
<PAGE>

                                                                              24

reimbursed pursuant to subsection (a), prior to the latest time permitted by the
relevant taxing authority for timely payment after conclusion of all contests
under Section 12.2(g).

               (iii)   Impositions imposed with respect to a piece of Equipment
for a billing period during which the Lease expires or terminates with respect
to such Equipment (unless the Lessee has exercised the Purchase Option with
respect to the Equipment) shall be adjusted and prorated on a daily basis
between the Lessee and the Lessor, whether or not such Imposition is imposed
before or after such expiration or termination and each party shall pay or
reimburse the other for each party's pro rata share thereof.

               (iv)    At the Lessee's request, the amount of any
indemnification payment by the Lessee pursuant to subsection (a) shall be
verified and certified by an independent public accounting firm mutually
acceptable to the Lessee and the Tax Indemnitee. The fees and expenses of such
independent public accounting firm shall be paid by the Lessee unless such
verification shall result in an adjustment in the Lessee's favor of 10% or more
of the payment as computed by such Tax Indemnitee, in which case such fee shall
be paid by such Tax Indemnitee.

       (d) (i) The Lessee shall be responsible for preparing and filing any real
and personal property or ad valorem tax returns in respect of the Equipment. In
case any other report or tax return shall be required to be made with respect to
any obligations of the Lessee under or arising out of subsection (a) and of
which the Lessee has knowledge, the Lessee, at its sole cost and expense, shall
notify the relevant Tax Indemnitee of such requirement and (except if such Tax
Indemnitee notifies the Lessee that such Person intends to file such report or
return) (A) to the extent required or permitted by and consistent with Legal
Requirements, make and file in its own name such return, statement or report;
and (B) in the case of any other such return, statement or report required to be
made in the name of such Tax Indemnitee, advise such Tax Indemnitee of such fact
and prepare such return, statement or report for filing by such Tax Indemnitee
or, where such return, statement or report shall be required to reflect items in
addition to any obligations of the Lessee under or arising out of subsection
(a), provide such Tax Indemnitee at the Lessee's expense with information
sufficient to permit such return, statement or report to be properly made with
respect to any obligations of the Lessee under or arising out of subsection (a).
Such Tax Indemnitee shall, upon the Lessee's request and at the Lessee's
expense, provide any data maintained by such Tax Indemnitee (and not otherwise
within the control of the Lessee) with respect to the Equipment which the Lessee
may reasonably require to prepare any required tax returns or reports;

     (e) If as a result of the payment or reimbursement by the Lessee of any
expenses of a Tax Indemnitee or the payment of any Transaction Expenses incurred
in connection with the transactions contemplated by the Operative Agreements,
any Tax Indemnitee, shall suffer a net increase in any federal, state or local
income tax liability, the Lessee shall indemnify such Tax Indemnitees (without
duplication of any indemnification required by subsection (a)) on an After Tax
Basis for the amount of such increase.  The calculation of any such net increase
shall take into account any current or future tax savings realized or reasonably
expected to be realized by such Tax Indemnitees, in respect thereof, as well as
any interest, penalties and additions to tax payable by such Tax Indemnitees, in
respect thereof;
<PAGE>

                                                                              25

          (f)  As between the Lessee and the Lessor, the Lessee shall be
responsible for, and the Lessee shall indemnify and hold harmless the Trust
Company in its individual capacity and as the Lessor (without duplication of any
indemnification required by subsection (a)) on an After Tax Basis against, any
obligation for United States withholding taxes imposed in respect of the
interest payable on the Notes or the Certificates to the extent, but only to the
extent, Lessor has actually paid funds to a taxing authority with respect to
such withholding taxes (and, if the Lessor receives a demand for such payment
from any taxing authority, the Lessee shall discharge such demand on behalf of
the Lessor);

       (g) (i) If a written claim is made against any Tax Indemnitee or if any
proceeding shall be commenced against such Tax Indemnitee (including a written
notice of such proceeding), for any Impositions, such Tax Indemnitee shall
promptly notify Lessee in writing and shall not take action with respect to such
claim or proceeding without the consent of Lessee for thirty (30) days after the
receipt of such notice by Lessee; provided, that, in the case of any such claim
                                  --------
or proceeding, if action shall be required by law or regulation to be taken
prior to the end of such 30-day period, such Tax Indemnitee shall, in such
notice to Lessee, inform Lessee, and no action shall be taken with respect to
such claim or proceeding without the consent of Lessee before the end of such
shorter period; provided, further, that the failure of such Tax Indemnitee to
                --------  -------
give the notices referred to this sentence shall not diminish Lessee's
obligation hereunder except to the extent such failure materially adversely
affects Lessee in contesting all or part of such claim.

               (ii)   If, within thirty (30) days of receipt of such notice from
the Tax Indemnitee (or such shorter period as the Tax Indemnitee has noticed
Lessee is required by law or regulation for the Tax Indemnitee to commence such
contest), Lessee shall request in writing that such Tax Indemnitee contest such
Imposition, the Tax Indemnitee shall, at the expense of Lessee, in good faith
conduct and control such contest (including, without limitation, by pursuit of
appeals) relating to the validity, applicability or amount of such Impositions
(provided, however, that (A) if such contest can be pursued independently from
any other proceeding involving a tax liability of such Tax Indemnitee, the Tax
Indemnitee, at Lessee's request, shall allow Lessee to conduct and control such
contest and (B) in the case of any contest that Lessee is not entitled to
control, the Tax Indemnitee may request Lessee to conduct and control such
contest if possible or permissible under applicable law or regulation) by, in
the sole discretion of the Person conducting and controlling such contest, (1)
resisting payment thereof, (2) not paying the same except under protest, if
protest is necessary and proper, (3) if the payment be made, using reasonable
efforts to obtain a refund thereof in appropriate administrative and judicial
proceedings, or (4) taking such other action as is reasonably requested by
Lessee from time to time.

               (iii)  The party controlling any contest shall consult in good
faith with the non-controlling party and shall keep the non-controlling party
reasonably informed as to the conduct of such contest; provided that all
                                                       --------
decisions ultimately shall be made in the sole discretion of the controlling
party. The parties agree that an Tax Indemnitee may at any time decline to take
further action with respect to the contest of any Imposition and may settle such
contest if such Tax Indemnitee shall waive its rights to any indemnity from
Lessee that otherwise would be payable in respect of such claim (and any future
claim by any taxing authority with
<PAGE>

                                                                              26

respect to other taxable periods that are based, in whole or in part, upon the
resolution of such claim) and shall pay to Lessee any amount previously paid or
advanced by Lessee pursuant to this Section 12.2 by way of indemnification or
advance for the payment of an Imposition, and no other then future liability of
the Lessee is likely with respect to such Imposition.

        (iv)  Notwithstanding the foregoing provisions of this Section 12.2, a
Tax Indemnitee shall not be required to take any action and Lessee shall not be
permitted to contest any Impositions in its own name or that of the Tax
Indemnitee unless (A) Lessee shall have agreed to pay and shall pay to such Tax
Indemnitee on demand and on an After Tax Basis all reasonable costs, losses and
expenses that such Tax Indemnitee actually incurs in connection with contesting
such Impositions, including, without limitation, all reasonable legal,
accounting and investigatory fees and disbursements, (B) in the case of a claim
that must be pursued in the name of an Tax Indemnitee (or an Affiliate thereof),
the amount of the potential indemnity (taking into account all similar or
logically related claims that have been or could be raised in any audit
involving such Tax Indemnitee for which Lessee may be liable to pay an indemnity
under this Section 12.2) is more than $25,000, unless the pursuit of such
contest is in a manner mutually satisfactory to the Tax Indemnitee and the
Lessee, but in no event shall such right prevent the Lessee from prosecuting or
continuing such contest, (C) the Tax Indemnitee shall have reasonably determined
that the action to be taken will not result in any material danger of sale,
forfeiture or loss of any piece of Equipment, or any part thereof or interest
therein, will not interfere with the payment of Rent, and will not result in
risk of criminal liability, (D) if such contest shall involve the payment of the
Imposition prior to the contest, Lessee shall provide to the Tax Indemnitee an
interest-free advance in an amount equal to the Imposition that the Tax
Indemnitee is required to pay (with no additional net after-tax cost to such Tax
Indemnitee), (E) in the case of a claim that must be pursued in the name of an
Tax Indemnitee (or an Affiliate thereof), Lessee shall have provided to such Tax
Indemnitee an opinion of independent tax counsel selected by the Lessee and
reasonably satisfactory to such Tax Indemnitee stating that a reasonable basis
exists to contest such claim (or, in the case of an appeal of an adverse
determination, an opinion of such counsel to the effect that there is
substantial authority for the position asserted in such appeal) and (F) no Event
of Default shall have occurred and be continuing.  In no event shall a Tax
Indemnitee be required to appeal an adverse judicial determination to the United
State Supreme Court.  In addition, a Tax Indemnitee shall not be required to
contest any claim in its name (or that of an Affiliate) if the subject matter
thereof shall be of a continuing nature and shall have previously been decided
adversely by a court of competent jurisdiction pursuant to the contest
provisions of this Section 12.2, unless there shall have been a change in law
(or interpretation thereof) and the shall Tax Indemnitee have received, at the
Lessee's expense, an opinion of independent tax counsel selected by the Lessee
and reasonably acceptable to the Tax Indemnitee stating that as a result of such
change in law (or interpretation thereof), it is more likely than not that the
Tax Indemnitee will prevail in such contest.

      SECTION 13.    MISCELLANEOUS

      13.1  Survival of Agreements.  The representations, warranties, covenants,
      ----------------------------
indemnities and agreements of the parties provided for in the Operative
Agreements, and the parties' obligations under any and all thereof, shall
survive the execution and delivery of this
<PAGE>

                                                                              27

Agreement, the transfer of the Equipment to the Trust, any disposition of any
interest of the Trust in the Equipment or any interest of the Investors in the
Trust, the payment of the Notes and any disposition thereof and shall be and
continue in effect notwithstanding any investigation made by any party and the
fact that any party may waive compliance with any of the other terms, provisions
or conditions of any of the Operative Agreements. Except as otherwise expressly
set forth herein or in other Operative Agreements, the indemnities of the
parties provided for in the Operative Agreements shall survive the expiration or
termination of any thereof.

          13.2   No Broker, etc.  Each of the parties hereto represents to the
          ---------------------
others that it has not retained or employed any broker, finder or financial
adviser to act on its behalf in connection with this Agreement, nor has it
authorized any broker, finder or financial adviser retained or employed by any
other Person so to act, except for the Arranger, the fees of which shall be paid
by the Lessee in accordance with the Fee Letter. Any party who is in breach of
this representation shall indemnify and hold the other parties harmless from and
against any liability arising out of such breach of this representation.

          13.3   Notices.  All notices, requests and demands to or upon the
          --------------
respective parties hereto to be effective shall be in writing (including by
facsimile transmission), and, unless otherwise expressly provided herein, shall
be deemed to have been duly given or made (a) when delivered by hand, (b) one
Business Day after delivery to a nationally recognized courier service
specifying overnight delivery, (c) three Business Days after being deposited in
the mail, certified or registered, postage prepaid, or (d) in the case of
facsimile notice, when sent and receipt has been confirmed, addressed as follows
in the case of the Lessee, the Trust, the Trust Company and the Agent, and as
set forth in Schedule 1.1 of the Credit Agreement in the case of the Lenders:
             ------------

   If to the Lessee, to it at: Hanover Compression Inc.
                               12001 North Houston Rosslyn
                               Houston, Texas 77806
                               Attention: Chief Financial Officer
                               Telecopy No.: 281-447-8781

   With a copy to:             Latham & Watkins
                               Sears Tower, Suite 5800
                               233 South Wacker Drive
                               Chicago, Illinois 60606
                               Attention: Richard S. Meller and
                                          Michael A. Pucker
                               Telecopy No.: 312-993-9767

   If to the Trust, to it at:  Hanover Equipment Trust 2000B
                               c/o Wilmington Trust Company
                               Rodney Square North
                               1100 North Market Street
                               Wilmington, Delaware 19890
                               Attention:  Corporate Trust Administration
                               Telecopy No.:  302-651-8882

<PAGE>

                                                                              28

     If to the Investors, to them
     at:                            Bank Hapoalim B.M.
                                    250 Montgomery Street, Suite 700
                                    San Francisco, CA  94104

                                    FBTC Leasing Corp.
                                    Two World Trade Center
                                    New York, NY  10048

     If to the Trust Company,
     to it at:                      Wilmington Trust Company
                                    Rodney Square North
                                    1100 North Market Street
                                    Wilmington, Delaware 19890
                                    Attention:  Corporate Trust Administration
                                    Telecopy No.:  302-651-8882

     If to the Agent, to it at:     The Chase Manhattan Bank
                                    Loan and Agency Services Group
                                    One Chase Manhattan Plaza
                                    New York, New York 10081
                                    Attention:  Agency Service
                                    Telecopy No.:  212-552-5777

                                               and

                                    Credit and Lending
                                    The Chase Manhattan Bank
                                    270 Park Avenue
                                    21st Floor
                                    New York, NY  10017
                                    Attention:  Steve Wood
                                    Telecopy No.:  212-270-3897

From time to time any party may designate a new address for purposes of notice
hereunder by notice to each of the other parties hereto.

          13.4  Counterparts.  This Agreement may be executed by the parties
          ------------------
hereto in separate counterparts, each of which when so executed and delivered
shall be an original, but all such counterparts shall together constitute but
one and the same instrument.

          13.5  Amendments and Termination. Neither this Agreement nor any of
          --------------------------------
the terms hereof may be terminated, amended, supplemented, waived or modified
except by an instrument in writing signed by the party against which the
enforcement of the termination, amendment, supplement, waiver or modification
shall be sought. This Agreement may be terminated by an agreement signed in
writing by the Trust, both Investors, the Lessee, the Agent
<PAGE>

                                                                              29

and the Lenders. Notwithstanding the foregoing provisions to the contrary, in
the case of the Lenders, the action of the Required Lenders shall control,
except as otherwise provided in Section 9.1 of the Credit Agreement.

     13.6   Headings, etc..  The Table of Contents and headings of the various
     --------------------
Sections and Subsections of this Agreement are for convenience of reference only
and shall not modify, define, expand or limit any of the terms or provisions
hereof.

     13.7   Parties in Interest.  Except as expressly provided herein, none of
     --------------------------
the provisions of this Agreement are intended for the benefit of any Person
except the parties hereto.

     13.8   GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
     -----------------------
AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

     13.9   Severability.  Any provision of this Agreement that is prohibited or
     -------------------
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any
other jurisdiction.

     13.10  Liability Limited.  The Lessee, the Agent, the Lenders and the
     ------------------------
Investors each acknowledge and agree that the Trust Company is (except as
otherwise expressly provided herein or therein) entering into this Agreement and
the other Operative Agreements to which it is a party (other than the Trust
Agreement), solely in its capacity as trustee under the Trust Agreement on
behalf of the Trust and not in its individual capacity and that Trust Company
shall not be liable or accountable under any circumstances whatsoever in its
individual capacity for or on account of any statements, representations,
warranties, covenants or obligations stated to be those of the Trust, except for
its own gross negligence or willful misconduct and as otherwise expressly
provided herein or in the other Operative Agreements.

     13.11  Rights of Lessee.  Notwithstanding any provision of the Operative
     -----------------------
Agreements, if at any time all obligations (i) of the Trust under the Credit
Agreement and the Security Documents and (ii) of the Lessee under the Operative
Agreements have in each case been satisfied or discharged in full, then the
Lessee shall be entitled to (a) terminate the Lease (to the extent not
previously terminated) and (b) receive all amounts then held under the Operative
Agreements and all proceeds with respect to the Equipment.  Upon the fulfillment
of the obligations contained in clauses (i) and (ii) above, the Lessor shall
transfer to the Lessee all of its right, title and interest in and to the
Equipment (to the extent not previously transferred to the Lessee in accordance
with the Lease) and any amounts or proceeds referred to in the foregoing clause
(b) shall be paid over to the Lessee.

     13.12  Further Assurances.  The parties hereto shall promptly cause to be
     -------------------------
taken, executed, acknowledged or delivered, at the sole expense of the Lessee
(other than with respect to the removal of Lessor Liens), all such further acts,
conveyances, documents and assurances as the other parties may from time to time
reasonably request in order to carry out and effectuate
<PAGE>

                                                                              30

the intent and purposes of this Agreement, the other Operative Agreements and
the transactions contemplated hereby and thereby (including, without limitation,
the preparation, execution and filing of any and all Uniform Commercial Code
financing statements and other filings or registrations which the parties hereto
may from time to time request to be filed or effected). The Lessee, at its own
expense, shall take such action as may be reasonably requested in order to
maintain and protect all security interests provided for hereunder or under any
other Operative Agreement.

     13.13  Successors and Assigns.  This Agreement shall be binding upon and
     -----------------------------
inure to the benefit of the parties hereto and their respective successors and
assigns.

     13.14  No Representation or Warranty.  Nothing contained herein, in any
     ------------------------------------
other Operative Agreement or in any other materials delivered to the Lessee in
connection with the transactions contemplated hereby or thereby shall be deemed
a representation or warranty by the Agent or the Arranger or any of their
Affiliates as to the proper accounting treatment or tax treatment that should be
afforded to the Lease and the Lessor's ownership of the Equipment and the Agent
expressly disclaims any representation or warranty with respect to such matters.

     13.15  Highest Lawful Rate.  It is the intention of the parties hereto
     --------------------------
conform strictly to applicable usury laws and, anything herein to the contrary
notwithstanding, the obligations of the Lessee, the Lessor or the Investors or
any other party under any Operative Agreement, shall be subject to the
limitation that payments of interest or of other amounts constituting interest
shall not be required to the extent that receipt thereof would be in excess of
the Highest Lawful Rate, or otherwise contrary to provisions of law applicable
to the recipient limiting rates of interest which may be charged or collected by
the recipient.  Accordingly, if the transactions or the amount paid or otherwise
agreed to be paid for the use, forbearance or detention of money under this
Agreement, the Lease and any other Operative Agreement would exceed the Highest
Lawful Rate or otherwise be usurious with respect to the recipient of any such
amount, then, in that event, notwithstanding anything to the contrary in this
Agreement, the Lease or any other Operative Agreement, it is agreed as follows
as to the recipient of any such amount:

     (a) the provisions of this Section 13.15 shall govern and control over any
other provision in this Agreement, the Lease and any other Operative Agreement
and each provision set forth therein is hereby so limited;

     (b) the aggregate of all consideration which constitutes interest that is
contracted for, charged or received under this Agreement, the Lease, or any
other Operative Agreement shall under no circumstances exceed the maximum amount
of interest allowed by any Requirement of Law (such maximum lawful interest
rate, if any, with respect to such Lender herein called the "Highest Lawful
                                                             --------------
Rate"), and all amounts owed under this Agreement, the Lease and any other
----
Operative Agreement shall be held subject to reduction and ((i) the amount of
interest which would otherwise be payable to the recipient hereunder and under
the Lease, the Loan Documents and any other Operative Agreement, shall be
automatically reduced to the amount allowed under any Requirement of Law and
(ii) any unearned interest paid in excess of
<PAGE>

                                                                              31

the Highest Lawful Rate shall be credited to the payor by the recipient (or, if
such consideration shall have been paid in full, refunded to the payee);

     (c) all sums paid, or agreed to be paid for the use, forbearance and
detention of the money under this Agreement, the Lease, or any other Operative
Agreement shall, to the extent permitted by any Requirement of Law, be
amortized, prorated, allocated and spread throughout the full term of such
indebtedness until payment in full so that the actual rate of interest is
uniform throughout the full term thereof; and

     (d) if at any time the interest, together with any other fees, late charges
and other sums payable pursuant to or in connection with this Agreement, the
Lease, and any other Operative Agreement executed in connection herewith or
therewith, and deemed interest under any Requirement of Law exceeds that amount
which would have accrued at the Highest Lawful Rate, the amount of interest and
any such fees, charges and sums to accrue to the recipient of such interest,
fees, charges and sums pursuant to the Operative Agreement shall be limited,
notwithstanding anything to the contrary in the Operative Agreement to that
amount which would have accrued at the Highest Lawful Rate for the recipient,
but any subsequent reductions, as applicable, shall not reduce the interest to
accrue pursuant to the Operative Agreement below the recipient's Highest Lawful
Rate until the total amount of interest payable to the recipient (including all
consideration which constitutes interest) equals the amount of interest which
would have been payable to the recipient (including all consideration which
constitutes interest), plus the amount of fees which would have been received
                       ----
but for the effect of this Section 13.15.

     13.16  Waiver.  EACH PARTY HERETO FOR THE BENEFIT OF THE PARTIES HERETO AND
     -------------
THE GUARANTORS HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE EXTENT NOT
PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY LEGAL ACTION
OR PROCEEDING PURSUANT TO THE OPERATIVE AGREEMENTS ANY SPECIAL, EXEMPLARY,
PUNITIVE, INDIRECT OR CONSEQUENTIAL DAMAGES.
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed by their respective officers thereunto duly authorized as of
the day and year first above written.

                              HANOVER COMPRESSION INC., as Lessee

                              By:   ________________________________________
                                    Name:
                                    Title:

                              HANOVER EQUIPMENT TRUST 2000B

                              By:   Wilmington Trust Company, not individually
                                    but solely as Trustee

                                    ________________________________________
                                    Name:
                                    Title:

                              THE CHASE MANHATTAN BANK, as Agent and
                              as a Lender

                              By:   ________________________________________
                                    Name:
                                    Title:

                              WILMINGTON TRUST COMPANY, in its
                              individual capacity, only to the extent expressly
                              set forth herein

                              By:   ________________________________________
                                    Name:
                                    Title:
<PAGE>

                              FBTC LEASING CORP., as an Investor

                              By:   ________________________________________
                                    Name:
                                    Title:

<PAGE>

                              ARAB BANKING CORPORATION (B.S.C.), as a
                              Lender

                              By:   ________________________________________
                                    Name:
                                    Title:
<PAGE>

                              BANK HAPOALIM B.M., as an Investor and as a
                              Lender

                              By:    _____________________________________
                                     Name:
                                     Title:

                              By:    _____________________________________
                                     Name:
                                     Title:
<PAGE>

                            THE BANK OF TOKYO MITSUBISHI LIMITED,
                            as a Lender

                            By:      ______________________________
                                     Name:
                                     Title:
<PAGE>

                            CITIBANK, N.A., as a Co-Agent and as a Lender

                            By:      _______________________________
                                     Name:
                                     Title:
<PAGE>

                            COMERICA BANK, as a Lender

                            By:       _______________________________
                                      Name:
                                      Title:
<PAGE>

                            CREDIT SUISSE FIRST BOSTON, as a Co-Agent
                            and as a Lender

                            By:      ______________________________
                                     Name:
                                     Title:
<PAGE>

                            THE FUJI BANK, LIMITED, as a Lender

                            By:    ____________________________
                                   Name:
                                   Title:
<PAGE>

                            GUARANTY FEDERAL BANK, F.S.B., as a
                            Lender

                            By:    ___________________________
                                   Name:
                                   Title:
<PAGE>

                            THE INDUSTRIAL BANK OF JAPAN, LTD., as a
                            Co-Agent and as a Lender

                            By:    _____________________________
                                   Name:
                                   Title:
<PAGE>

                            NATIONAL WESTMINSTER BANK plc, NEW
                            YORK BRANCH, as Managing Agent and as a
                            Lender

                            By:    ____________________________
                                   Name:
                                   Title:
<PAGE>

                            NATIONAL WESTMINSTER BANK plc,
                            NASSAU BRANCH, as Managing Agent and as a
                            Lender

                            By:    ______________________________
                                   Name:
                                   Title:
<PAGE>

                            SUNTRUST BANK, as a Lender

                            By:    ______________________________
                                   Name:
                                   Title:
<PAGE>

                                                                         ANNEX B

                                  PRICING GRID

                            Participation Agreement
                            -----------------------

<TABLE>
<CAPTION>
                                                                                  Applicable
    Consolidated          Applicable Margin-         Applicable Margin-           Commitment
 Indebtedness Ratio       Eurocurrency Loans           Base Rate Loans             Fee Rate
-------------------       ------------------           ---------------             --------
<S>                       <C>                        <C>                      <C>
     *4.0 to 1.0                   1.75%                      .750%                   .375%

    **4.0 to 1.0 and               1.75%                      .750%                   .375%
     *3.0 to 1.0

    **3.0 to 1.0 and               1.50%                      .500%                   .300%
     *2.0 to 1.0

    **2.0 to 1.0 and               1.25%                      .500%                   .300%
     *1.0 to 1.0

    **1.0 to 1.0                   1.00%                         0%                   .250%
</TABLE>

*  denotes greater than
** denotes less than or equal to

Changes in the Applicable Margin or in the Applicable Commitment Fee Rate
resulting from changes in the Consolidated Indebtedness Ratio shall become
effective on each date which is the start of the succeeding fiscal quarter
(each, an "Adjustment Date") for which an Applicable Margin Certificate of
           ---------------
Holdings is delivered to the Lenders pursuant to Section 10.2(f) of the
Guarantee (but in any event not later than the 45th day after the end of each of
each quarter of each fiscal year) and shall remain in effect until the next
change to be effected pursuant to this paragraph.  If any Applicable Margin
Certificate referred to above is not delivered within the time periods specified
above, then the Consolidated Indebtedness Ratio as at the end of the fiscal
period that would have been covered thereby shall for the purposes of this
definition be deemed to be greater than 4.0 to 1.0.  In addition, at all times
while an Event of Default shall have occurred and be continuing, the highest
rate set forth in each column of the Pricing Grid shall apply.  Each
determination of the Consolidated Indebtedness Ratio pursuant to this Pricing
Grid shall be made for the periods and in the manner contemplated by Section
11.1(d) of the Guarantee.
<PAGE>

                                                                EXHIBIT D TO THE
                                                         PARTICIPATION AGREEMENT
                                                         -----------------------

                                      FORM

                                  REQUISITION

          HANOVER COMPRESSION INC. (the "Lessee"), submits this Requisition and
                                         ------
certifies, represents and warrants to each of the Lessor, Investors, The Chase
Manhattan Bank, as agent (in such capacity, the "Agent"), and each of the
                                                 -----
financial institutions from time to time parties to the Credit Agreement (the
"Lenders") dated as of October 27, 2000, as follows (capitalized terms used in
 -------
this Requisition and not otherwise defined herein shall have the meaning
assigned to such terms in Annex A to the Participation Agreement dated as of
                          -------
October 27, 2000 , among the Lessee, the Lessor, the Investor, the Agent and the
Lenders) in each case as of the date hereof:

          (a)  Amount.  (a)  The total amount of the Advance requested by this
     Requisition is $[   ]. The Advance will be comprised of Loans totalling
     $[    $[   ] (not to exceed 97% of the aggregate amount requested).

          (b)  The total amounts of the Available Commitments and the Available
     Investor Commitment (after giving effect to the amount requested by this
     Requisition) are $[    ] and $[    ], respectively.

          (c)  With respect to aggregate Equipment Cost, the aggregate amount of
     the Loans outstanding represent [___]% of such Equipment Cost and the
     aggregate amount of the Investment Contribution represents [__]% of such
     Equipment Cost.

          (d)  Date of Advance.  The Lessee requests that the Advance be made on
     [   ].

          (e)  Type of Loan and Contribution.  The Lessee requests that the
     Loans be made as [Eurodollar Rate] [ABR Rate] Loans.

          (f)  Interest Period for Eurodollar Loans.  [  ] months.

          (g)  Proceeds.  The Lessee represents and warrants that the proceeds
     of the Advance shall be used solely to pay the Equipment Acquisition Costs
     and Transaction Expenses with respect to the Equipment identified in this
     Requisition.

          (h)  Representations and Warranties.  The Lessee hereby represents and
     warrants as follows in each case as of the date hereof:

                    (i)  The representations and warranties of the Lessee and
               the Guarantors set forth in the Operative Agreements are true and
               correct in all material respects on and as of the date hereof.
               The Lessee and the Guarantors are in compliance with their
               respective obligations under the Operative
<PAGE>

                                                                              16

               Agreements and there exists no Default or Event of Default (other
               than a Borrower Default) under any of the Operative Agreements.
               No Default or Event of Default (other than a Borrower Default)
               will occur under any of the Operative Agreements as a result of
               the Advance requested by this Requisition.

                    (ii)  Attached to this Requisition is a schedule identifying
               the Equipment which is the subject of this Requisition.

                    (iii) All conditions precedent contained in the
               Participation Agreement and in the other Operative Agreements
               relating to the acquisition of the Equipment by the Lessor have
               been satisfied in full.

          (i)  Indemnity.  The Lessee agrees to indemnify and hold harmless each
     of the Trust, the Trust Company, the Investors, the Agent and the Lenders
     and each director, officer, employee, agent, shareholder, partner or holder
     of beneficial interest thereof (each, an "indemnified person") against, and
     to reimburse each indemnified person, upon its demand, for, any losses,
     claims, damages, liabilities or other expenses ("Losses") to which such
     indemnified person may become subject insofar as such Losses arise out of
     or in any way relate to the breach by the Lessee of any representation or
     warranty contained in this Requisition or any untrue statement made in this
     Requisition, including, without limitation, Losses consisting of reasonable
     legal or other expenses incurred in connection with investigating,
     defending or participating in any legal proceeding relating to any of the
     foregoing (whether or not such indemnified person is a party thereto);
     provided, however, that no such indemnification will be required for any
     losses to the extent such losses arise solely out of the gross negligence
     or willful misconduct of such indemnified person.

          (j)  Survival.  The agreements, statements, representation and
     warranties contained in this Requisition shall survive and remain effective
     until the Loans and all other obligations under the Credit Agreement and
     the other Operative Agreements are paid or otherwise satisfied in full by
     the Lessee and the Lessee, as applicable.

                                             HANOVER COMPRESSION INC.

Date:                                        By: ____________________________
                                                 Name:
                                                 Title:
<PAGE>

                                                                    EXHIBIT E TO
                                                         PARTICIPATION AGREEMENT
                                                         -----------------------

                     FORM OF EQUIPMENT CLOSING CERTIFICATE

Pursuant to that certain Participation Agreement, dated as of October 27, 2000,
among Hanover Compression Inc., as Lessee (the "Lessee"), Hanover Equipment
Trust 2000B, as Lessor, The Chase Manhattan Bank, as Agent, the Investors, the
Trust Company and the Lenders named therein, the undersigned, a [   ] of Lessee,
does hereby certify on behalf of Lessee as follows (capitalized terms used
herein shall have the meanings ascribed thereto in the Participation Agreement):

          (a)  The Tranche A Percentage for the Equipment being acquired on the
date hereof is [  ]%.

          (b)  The Aggregate Tranche A Percentage for all Equipment after giving
effect to the acquisition of the Equipment being acquired on the date hereof is
[   ]%.

           IN WITNESS WHEREOF, I have signed my name this ____ day of ________,
2000.

                                             HANOVER COMPRESSION INC.

                                             By: ______________________________
                                                 Name:
                                                 Title:<PAGE>

                                                                   EXHIBIT 10.57

                                                                  EXECUTION COPY

                               SECURITY AGREEMENT

          SECURITY AGREEMENT, dated as of October 27, 2000, made by HANOVER
EQUIPMENT TRUST 2000B, a Delaware business trust (the "Borrower"), in favor of
                                                       --------
THE CHASE MANHATTAN BANK, as Agent (in such capacity, the "Agent") for the
                                                           -----
Lenders parties to the Credit Agreement, dated as of the date hereof (as
amended, supplemented or otherwise modified from time to time, the "Credit
                                                                    ------
Agreement"), among the Borrower, the Agent and such Lenders.
---------

                             Preliminary Statement
                             ---------------------

          A.   Pursuant to the Credit Agreement, the Lenders have severally
agreed to make Loans to the Borrower upon the terms and subject to the
conditions set forth therein; and

          B.   It is a condition precedent to the obligation of the Lenders to
make their respective Loans to the Borrower under the Credit Agreement that the
Borrower shall have executed and delivered this Security Agreement to the Agent
for the ratable benefit of the Lenders.

          NOW, THEREFORE, in consideration of the premises and to induce the
Agent and the Lenders to enter into the Credit Agreement and to induce the
Lenders to make their respective Loans to the Borrower, the Borrower hereby
agrees with the Agent, for the ratable benefit of the Lenders, as follows:

     1. Defined Terms.
        -------------

          1.1. Definitions.  Unless otherwise defined herein, capitalized
               -----------
terms used herein shall have the respective meanings, and this Agreement shall
be interpreted in accordance with the rules of usage, set forth in Annex A
                                                                   -------
attached to the Participation Agreement dated as of the date hereof among the
Lessee, the Borrower, the Investors, the Trust Company, the Agent and the
Lenders, and the following terms shall have the following meanings:

          "Agreement": this Security Agreement, as the same may be amended,
           ---------
supplemented or otherwise modified from time to time.

          "Code": the Uniform Commercial Code as from time to time in effect in
           ----
the State of New York.

          "Collateral": as defined in Section 2.
           ----------

          "Equipment":  the equipment set forth on Schedule 1 annexed hereto,
           ---------                               ----------
and all other tangible personal property now or hereafter acquired by the
Borrower, together with any and all accessions, additions, improvements,
substitutions and replacements thereto and therefor.
<PAGE>

                                                                               2

          "Obligations": shall mean the Guaranteed Obligations.
           -----------

          "Proceeds": as defined in the Code.
           --------

     2. Grant of Security Interest.  As collateral security for the prompt
        --------------------------
and complete payment and performance when due (whether at the stated maturity,
by acceleration or otherwise) of the Obligations, the Borrower hereby grants to
the Agent for the ratable benefit of the Lenders a security interest in all of
its respective right, title and interest, whether the same be goods, fixtures,
equipment, general intangibles, accounts or chattel paper, in and to (a) the
Equipment, (b) rights and interests of Borrower as Lessor pursuant to the Lease,
(c) all books and records pertaining to the foregoing, (d) all warranties and
guarantees given by any Person with respect to any of the foregoing, as well as
all choses in action, claims, and causes of action arising from any breach
thereof, and (e) to the extent not otherwise included, all Proceeds and products
of the foregoing, in each case whether now existing or hereafter acquired
(collectively, the "Collateral"), subject to the rights of the Lessee, as Lessee
under the Lease, so long as no Lease Event of Default has occurred and is
continuing.

     3. Representations and Warranties.
        ------------------------------

     3.1. Equipment.  The Borrower hereby represents and warrants that, the
          ---------
Equipment will be kept at the locations listed on Schedule 1 subject only to
                                                  ----------
the Lessee's rights to relocate the Equipment as provided for in the Operative
Agreements.

     3.2. Chief Executive Office.  The Borrower hereby represents and warrants
          ----------------------
that the Borrower's chief place of business, chief executive office and office
where the documents, accounts and records related to the Collateral are kept is
located at Rodney Square North, 1100 North Market Street, Wilmington, Delaware
19890, Attention: Corporate Trust Administration.

     3.3. Farm Products.  The Borrower hereby represents and warrants that none
          -------------
of the Collateral constitutes, or is the Proceeds of, Farm Products.

     4.  Covenants.  From and after the date of this Agreement until the
         ---------
Obligations shall have been paid in full and the Commitments shall have expired
or otherwise been terminated:

     4.1. Further Documentation.  At any time and from time to time, upon the
          ---------------------
written request of the Agent, and at the sole expense of the Borrower, the
Borrower will promptly and duly execute and deliver such further instruments and
documents and take such further actions as the Agent may reasonably request for
the purpose of obtaining or preserving the full benefits of this Agreement and
of the rights and powers herein granted, including, without limitation, the
filing of any financing or continuation statements under the Uniform Commercial
Code in effect in any jurisdiction with respect to the security interests
created hereby.

     4.2. Changes in Locations.  (a)  Except with respect to the rights of the
          --------------------
Lessee under the Operative Agreements, the Borrower will not permit any of the
Equipment to be kept at a location other than those listed on Schedule 1;
                                                              ----------
and

               (b)  The Borrower will not change the location of its chief
executive offices from that specified in Section 3.2.
<PAGE>

                                                                               3

     4.3. Change in Name.  The Borrower will not change its name, identity or
          --------------
structure to such an extent that any financing statement filed by the Agent in
connection with this Agreement would become seriously misleading, unless they
shall have given the Agent at least 30 days' prior written notice of such
change.

     4.4. Further Identification of Collateral.  The Borrower will cause the
          ------------------------------------
Lessee to furnish to the Agent from time to time statements and schedules
further identifying and describing the Collateral and its location and such
other reports in connection with the Collateral as the Agent may reasonably
request, all in reasonable detail.

     5.   Remedies.
          ---------

     5.1. Code Remedies.  If a Credit Agreement Event of Default shall occur and
          -------------
be continuing, the Agent, on behalf of the Lenders, may exercise, in addition to
all other rights and remedies granted to them in this Agreement and in any other
instrument or agreement securing, evidencing or relating to the Obligations, all
rights and remedies of a secured party under the Code. Without limiting the
generality of the foregoing, the Agent, without demand of performance or other
demand, presentment, protest, advertisement or notice of any kind (except any
notice required by law or as referred to below) to or upon the Borrower, the
Lessee or any other Person (all and each of which demands, defenses,
advertisements and notices are hereby waived to the extent permitted by law),
may in such circumstances forthwith collect, receive, appropriate and realize
upon the Collateral, or any part thereof, and/or may forthwith sell, lease,
assign, give an option or options to purchase, or otherwise dispose of and
deliver the Collateral or any part thereof (or contract to do any of the
foregoing), in one or more parcels at public or private sale or sales, at any
exchange, broker's board or office of the Agent or any Lender or elsewhere upon
such terms and conditions as it may deem advisable and at such prices as it may
deem best, for cash or on credit or for future delivery without assumption of
any credit risk, but subject to the rights of the Lessee under the Lease so long
as no Lease Event of Default shall have occurred and be continuing. The Agent or
any Lender shall have the right upon any such public sale or sales, and, to the
extent permitted by law, upon any such private sale or sales, to purchase the
whole or any part of the Collateral so sold, free of any right or equity of
redemption in the Borrower, which right or equity is hereby waived or released
to the extent permitted by law. The Borrower further agrees, at the Agent's
request, to assemble the Collateral and make it available to the Agent at places
which the Agent shall reasonably select. The Agent shall apply the net proceeds
of any action taken by it pursuant to this subsection, after deducting all
reasonable costs and expenses of every kind incurred in connection therewith or
incidental to the care or safekeeping of any of the Collateral or in any way
relating to the Collateral or the rights of the Agent and the Lenders hereunder,
including, without limitation, reasonable attorneys' fees and disbursements, to
the payment in whole or in part of the Obligations, in accordance with Section
8.2 of the Credit Agreement, and only after such application and after the
payment by the Agent of any other amount required by any provision of law,
including, without limitation, Section 9-504(1)(c) of the Code, need the Agent
account for the surplus, if any, to the Borrower. To the extent permitted by
applicable law, the Borrower waives all claims, damages and demands it may
acquire against the Agent or any Lender arising out of the exercise by them of
any rights hereunder. If any notice of a proposed sale or other disposition of
Collateral shall be required by law, such notice shall be deemed reasonable and
proper if given at least 10 days before such sale or other disposition. The
Agent agrees that if it shall proceed to foreclose the
<PAGE>

                                                                               4

Lien of this Agreement, it shall, to the extent that it is entitled to do so
hereunder and under the other Operative Agreements, and is not then stayed or
prevented from doing so by law or otherwise, proceed (to the extent it has not
already done so) to exercise one or more of the significant possessory remedies
referred to in the Lease (as it shall determine in its sole good faith
discretion).

     6.   Agent's Appointment as Attorney-in-Fact; Agent's Performance of
          ---------------------------------------------------------------
Obligations.
------------

     6.1. Powers.  The Borrower hereby irrevocably constitutes and appoints the
          ------
Agent and any officer or agent thereof, with full power of substitution, as its
true and lawful attorney-in-fact with full irrevocable power and authority in
the place and stead of the Borrower and in the name of the Borrower or in its
own name, for the purpose of carrying out the terms of this Agreement, to take
any and all appropriate action and to execute any and all documents and
instruments which may be necessary or desirable to accomplish the purposes of
this Agreement, and, without limiting the generality of the foregoing, the
Borrower hereby gives the Agent the power and right, on behalf of the Borrower,
without notice to or assent by the Borrower, to do any or all of the following:

          (a) pay or discharge taxes and Liens levied or placed on or threatened
     against the Collateral, effect any repairs or any insurance called for by
     the terms of the Lease and pay all or any part of the premiums therefor and
     the costs thereof;

          (b) execute, in connection with any sale provided for in Section 5.1,
     any indorsements, assignments or other instruments of conveyance or
     transfer with respect to the Collateral; and

          (c) sign and indorse any invoices, freight or express bills, bills of
     lading, storage or warehouse receipts, drafts against debtors, assignments,
     verifications, notices and other documents in connection with any of the
     Collateral; (2) commence and prosecute any suits, actions or proceedings at
     law or in equity in any court of competent jurisdiction to collect the
     Collateral or any portion thereof and to enforce any other right in respect
     of any Collateral; (3) defend any suit, action or proceeding brought
     against the Borrower with respect to any Collateral; (4) settle, compromise
     or adjust any such suit, action or proceeding and, in connection therewith,
     to give such discharges or releases as the Agent may deem appropriate; and
     (5) generally, sell, transfer, pledge and make any agreement with respect
     to or otherwise deal with any of the Collateral as fully and completely as
     though the Agent were the absolute owner thereof for all purposes, and do,
     at the Agent's option and the Borrower's expense, at any time, or from time
     to time, all acts and things which the Agent deems necessary to protect,
     preserve or realize upon the Collateral and the Agent's and the Lenders'
     security interests therein and to effect the intent of this Agreement, all
     as fully and effectively as the Borrower might do.

     Anything in this subsection to the contrary notwithstanding, the Agent
agrees that it will not exercise any rights under the power of attorney provided
for in this subsection unless a Credit Agreement Event of Default shall have
occurred and be continuing.

     6.2. Performance by Agent of Borrower's Obligations.  If the Borrower
          ----------------------------------------------
fails to perform or comply with any of its agreements contained herein, the
Agent, at its option, but without any
<PAGE>

                                                                               5

obligation so to do, may perform or comply, or otherwise cause performance or
compliance, with such agreement.

     6.3. Borrower's Reimbursement Obligation.  The expenses of the Agent
          -----------------------------------
incurred in connection with actions undertaken as provided in this Section,
together with interest thereon after a Credit Agreement Event of Default at the
Overdue Rate from the date of payment by the Agent to the date reimbursed by the
Borrower, shall be payable by the Borrower to the Agent on demand.

     6.4. Ratification; Power Coupled With An Interest.  All powers,
          --------------------------------------------
authorizations and agencies contained in this Agreement are coupled with an
interest and are irrevocable until this Agreement is terminated and the security
interests created hereby are released.

     7.   Duty of Agent.  The Agent's sole duty with respect to the
          -------------
custody, safekeeping and physical preservation of the Collateral in its
possession, under Section 9-207 of the Code or otherwise to the extent permitted
by law, shall be to deal with it in the same manner as the Agent deals with
similar property for its own account.  Neither the Agent, any Lender nor any of
their respective officers, directors, employees or agents shall be liable for
failure to demand, collect or realize upon any of the Collateral or for any
delay in doing so or shall be under any obligation to sell or otherwise dispose
of any Collateral upon the request of the Borrower or any other Person or to
take any other action whatsoever with regard to the Collateral or any part
thereof.  The powers conferred on the Agent and the Lenders hereunder are solely
to protect the Agent's and the Lenders' interests in the Collateral and shall
not impose any duty upon the Agent or any Lender to exercise any such powers.
Neither the Agent, the Lenders nor any of their officers, directors, employees
or agents shall be responsible to the Borrower for any act or failure to act
hereunder, except for the negligence or willful misconduct of the Agent, any
Lender or any of their officers, directors, employees or agents.

     8.   Execution of Financing Statements.  Pursuant to and to the extent
          ---------------------------------
permitted by Section 9-402 of the Code, the Borrower authorizes the Agent to
file financing statements with respect to the Collateral without the signature
of the Borrower in such form and in such filing offices as the Agent reasonably
determines appropriate to perfect the security interests of the Agent under this
Agreement.  A carbon, photographic or other reproduction of this Agreement shall
be sufficient as a financing statement for filing in any jurisdiction.

     9.   Authority of Agent.  The Borrower acknowledges that the rights and
          ------------------
responsibilities of the Agent under this Agreement with respect to any action
taken by the Agent or the exercise or non-exercise by the Agent of any request,
judgment or other right or remedy provided for herein or resulting or arising
out of this Agreement shall, as between the Agent and the Lenders, be governed
by the Credit Agreement and by such other agreements with respect thereto as may
exist from time to time among them, but, as between the Agent and the Borrower,
the Agent shall be conclusively presumed to be acting as agent for the Lenders
with full and valid authority so to act or refrain from acting, and the Borrower
shall not be under any obligation, or entitlement, to make any inquiry
respecting such authority.

     10.  Notices.  Unless otherwise specifically provided herein, all notices,
          -------
requests and demands required or permitted by the terms hereof to be given to
any person shall be given pursuant to and in accordance with Section 13.3 of the
Participation Agreement.

<PAGE>

                                                                               6

     11.   Severability.  Any provision of this Agreement which is prohibited or
           ------------
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any
other jurisdiction.

     12.   Amendments in Writing; Cumulative Remedies.
           -------------------------------------------

     12.1. Amendments in Writing.  None of the terms or provisions of this
           ---------------------
Agreement may be waived, amended, supplemented or otherwise modified except by a
written instrument executed by the Borrower and the Agent, provided that
                                                           --------
any provision of this Agreement imposing obligations on the Borrower may be
waived by the Agent in a written instrument executed by the Agent.

     12.2. Remedies Cumulative.  The rights and remedies herein provided are
           -------------------
cumulative, may be exercised singly or concurrently and are not exclusive of any
other rights or remedies provided by law.

     13.   Section Headings.  The Section headings used in this Agreement are
           ----------------
for convenience of reference only and are not to affect the construction hereof
or be taken into consideration in the interpretation hereof.

     14.   Successors and Assigns.  This Agreement shall be binding upon the
           ----------------------
successors and assigns the Borrower and shall inure to the benefit of the Agent
and the Lenders and their successors and permitted assigns.

     15.   Governing Law.  This Agreement shall be governed by and construed
           -------------
and interpreted in accordance with the law of the State of New York.

     16.   Obligations Are Without Recourse.  Anything in this Agreement to
           --------------------------------
the contrary notwithstanding, the Borrower's liability hereunder shall be
limited as provided in Section 9.14 of the Credit Agreement.

     17.   Counterparts.  This Agreement may be executed in any number of
           ------------
separate counterparts, each of which shall be an original, but all of which
shall together constitute one and the same instrument.
<PAGE>

IN WITNESS WHEREOF, the undersigned has caused this Security Agreement to be
duly executed and delivered as of the date first above written.

                                    HANOVER EQUIPMENT TRUST 2000B

                                    By: Wilmington Trust Company, not
                                    individually but solely as Trustee

                                    By:  ____________________________
                                         Name:
                                         Title:
<PAGE>

                                                                      Schedule 1
                                                                      ----------

                                   EQUIPMENT
<PAGE>

                                                                       EXHIBIT A

                      SECURITY AGREEMENT SUPPLEMENT NO. __

          THIS SECURITY AGREEMENT SUPPLEMENT NO. __  (the "Security Agreement
                                                           ------------------
Supplement") dated as of _________, __, ____, to the Security Agreement, dated
----------
as of October 27, 2000 (as the same may be further amended, supplemented or
otherwise modified from time to time, the "Security Agreement") made by HANOVER
                                           ------------------
EQUIPMENT TRUST 2000B, a Delaware business trust, (the "Borrower"), in favor of
                                                        --------
THE CHASE MANHATTAN BANK, as Agent (in such capacity, the "Agent") for the
                                                           -----
Lenders party to the Credit Agreement, dated as of October 27, 2000 (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement"),
                                                           ----------------
among the Borrower, the Agent and such Lenders.

          WHEREAS, the Borrower has previously executed and delivered the
Security Agreement to grant to the Agent, for the ratable benefit of the
Lenders, a security interest in the collateral described therein;

          WHEREAS, pursuant to the Credit Agreement and the Participation
Agreement, the Lenders have severally agreed to make additional Loans to the
Borrower upon the terms and subject to the conditions set forth therein; and

          WHEREAS, it is a condition precedent, under the Participation
Agreement, to the obligation of the Lenders to make their respective additional
Loans that the Borrower shall have executed and delivered this Security
Agreement Supplement No. __ for the ratable benefit of the Lenders.

          NOW, THEREFORE, in consideration of the premises and to induce the
Lenders to make their respective Loans to the Borrower, the Borrower hereby
agrees with the Agent, for the ratable benefit of the Lenders, as follows:

     18.  Definitions; Rules of Usage.  For purposes of this Security Agreement
          ---------------------------
Supplement, capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to them in the Security Agreement.

     19.  Grant of Security Interest in the Additional Equipment.  As collateral
          ------------------------------------------------------
security, in addition to that referred to in the Security Agreement, for the
prompt and complete payment and performance when due (whether at the stated
maturity, by acceleration or otherwise) of the Obligations, the Borrower hereby
grants to the Agent for the ratable benefit of the Lenders a security interest
in all of its respective right, title and interest, whether the same be goods,
fixtures, equipment, general intangibles, accounts or chattel paper in and to
(a) the additional Equipment listed on Schedule I hereto (the "Additional
                                                               ----------
Equipment"), (b) rights and interests of Borrower as Lessor pursuant to Lease
---------
Supplement No. __, (c) all books and records pertaining to the foregoing, (d)
all warranties and guarantees given by any Person with respect to any of the
foregoing, as well as all choses in action, claims, and causes of action arising
from any breach thereof, and (e) to the extent not otherwise included, all
Proceeds and products of the foregoing, in each case whether now existing or
hereafter acquired (collectively, the "Collateral"), subject to the rights of
the Lessee, as Lessee under the Lease, so long as no Lease Event of Default has
occurred and is continuing. Effective upon the execution and delivery of this
Security
<PAGE>

Agreement Supplement by the Borrower, the Additional Equipment shall be subject
to the terms and provisions of the Security Agreement and shall be deemed to
constitute Equipment for all purposes with respect to the Security Agreement.

     20.  Ratification.  Except as specifically modified hereby, the terms and
          ------------
provisions of the Security Agreement are hereby ratified and confirmed and
remain in full force and effect.

     21.  GOVERNING LAW.  THIS SECURITY AGREEMENT SUPPLEMENT HAS BEEN DELIVERED
          -------------
IN, AND SHALL IN ALL RESPECTS BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THIS STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE
PERFORMED ENTIRELY WITHIN SUCH STATE.

     22.  Counterpart Execution.  This Security Agreement Supplement may be
          ---------------------
executed in any number of counterparts and by each of the parties hereto in
separate counterparts, all such counterparts together constituting but one and
the same instrument.

          IN WITNESS WHEREOF, the undersigned has caused this Security Agreement
Supplement No. __ be duly executed and delivered as of the date first above
written.

                              HANOVER EQUIPMENT TRUST 2000B

                              By:  Wilmington Trust Company, not in its
                                   individual capacity but solely as Trustee

                                    By:  _____________________________________
                                         Name:
                                         Title:
<PAGE>

                               JOINDER OF LESSEE
                               -----------------

          HANOVER COMPRESSION INC., a Delaware corporation ("Lessee") hereby
joins in the Security Agreement dated as of October 27, 2000 made by HANOVER
EQUIPMENT TRUST 2000B, as the Borrower in favor of The Chase Manhattan Bank, as
the Agent for the Lenders (the "Security Agreement") in order to, and HEREBY
                                ------------------
GRANTS TO THE AGENT FOR THE RATABLE BENEFIT OF THE LENDERS A SECURITY INTEREST
IN all of its right, title and interest, if any, in and to the Collateral for
the purpose of securing the Obligations.  Lessee acknowledges and agrees that,
upon the occurrence of a Credit Agreement Event of Default and subject to the
terms of the Lease, the Agent on behalf of the Lenders shall have the right to
exercise any and all of its remedies hereunder as against the Collateral.

          Lessee expressly agrees that the rights of the Agent and the Lenders,
under the Security Agreement, shall in no way be affected or impaired by reason
of the occurrence of any of the following events: (i) the waiver by the Agent or
the Lenders of the performance or observance by the Borrower, Lessee or any
other party of any terms of the Operative Agreements; (ii) the extension, in
whole or in part, of the time for payment by the Borrower of any sums owing or
payable under the Operative Agreements; (iii) any failure, delay or inability of
the Agent or the Lenders in enforcing any remedies or any other provisions under
the Operative Agreements; (iv) the occurrence of any event described in Section
6.1(1) of the Credit Agreement; or (v) the inability of the Borrower to perform
(or the release of the Borrower's performance) under the Operative Agreements
due to any Legal Requirement.  Notwithstanding the foregoing, Lessee shall not
have any personal liability under this Security Agreement and Joinder in excess
of its personal liability under the Guaranty and the other Operative
Agreements.

          This Joinder shall be considered part of the Security Agreement to
which it is attached, and all references in the Operative Agreements to the
Security Agreement shall mean the Security Agreement together with this Joinder.
<PAGE>

          All capitalized terms used herein and not otherwise defined herein
shall have the meaning ascribed to such terms in the Security Agreement.

          This Joinder has been duly executed by Lessee as of October 27, 2000.

                                   HANOVER COMPRESSION INC.

                                   By: ____________________________
                                       Name:
                                       Title:

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