Document:

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                              AMENDED AND RESTATED

                                CREDIT AGREEMENT

                            dated as of May 31, 2001

                                      among

                               AVISTA CORPORATION,

                             THE BANKS PARTY HERETO,

                              THE BANK OF NEW YORK,
                             as Documentation Agent

                                       and

                        TORONTO DOMINION (TEXAS), INC.,
                                    as Agent

                                   ----------

                           TD SECURITIES (USA), INC.,
                       as Advisor, Sole Lead Arranger and
                                 Sole Bookrunner

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<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
Article        Section                                                            Page
-------        -------                                                            ----
<S>            <C>                                                                <C>
I.  DEFINITIONS
               SECTION 1.01.  Defined Terms  ...................................  5
               SECTION 1.02.  Terms Generally ..................................  20

II.  THE CREDITS
               SECTION 2.01.  Commitments ......................................  20
               SECTION 2.02.  Loans.............................................  22
               SECTION 2.03.  Notice of Revolving Borrowings ...................  23
               SECTION 2.05.  Repayment of Loans; Evidence of Debt .............  27
               SECTION 2.06.  Letters of Credit ................................  28
               SECTION 2.07.  Fees .............................................  32
               SECTION 2.08.  Interest on Loans.................................  34
               SECTION 2.09.  Default Interest .................................  34
               SECTION 2.10.  Alternate Rate of Interest .......................  35
               SECTION 2.11.  Termination, Reduction and Extension of
                              Commitments ......................................  35
               SECTION 2.12.  Prepayment .......................................  36
               SECTION 2.13.  Reserve Requirements; Change in Circumstances ....  36
               SECTION 2.14.  Change in Legality ...............................  38
               SECTION 2.15.  Indemnity ........................................  39
               SECTION 2.16.  Pro Rata Treatment ...............................  39
               SECTION 2.17.  Sharing of Setoffs ...............................  40
               SECTION 2.18.  Payments .........................................  41
               SECTION 2.19.  Taxes ............................................  41
               SECTION 2.20.  Termination or Assignment of Commitments
                              Under Certain Circumstances ......................  44

III.  REPRESENTATIONS AND WARRANTIES
               SECTION 3.01.  Organization; Powers .............................  45
               SECTION 3.02.  Authorization ....................................  45
               SECTION 3.03.  Enforceability ...................................  46
</TABLE>

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<TABLE>
Article        Section                                                            Page
-------        -------                                                            ----
<S>            <C>                                                                <C>
               SECTION 3.04.  Governmental Approvals ...........................  46
               SECTION 3.05.  Financial Statements .............................  46
               SECTION 3.06.  No Material Adverse Change .......................  46
               SECTION 3.07.  Litigation; Compliance with Laws .................  47
               SECTION 3.08.  Federal Reserve Regulations ......................  47
               SECTION 3.09.  Investment Company Act; Public Utility Holding
                              Company Act ......................................  47
               SECTION 3.10.  Use of Proceeds and Letters of Credit ............  48
               SECTION 3.11.  No Material Misstatements ........................  48
               SECTION 3.12.  Employee Benefit Plans ...........................  48
               SECTION 3.13.  Environmental and Safety Matters .................  48
               SECTION 3.14.  Significant Subsidiaries .........................  49

IV.  CONDITIONS OF LENDING
               SECTION 4.01.  All Borrowings ...................................  49
               SECTION 4.02.  First Borrowing ..................................  50

V.  AFFIRMATIVE COVENANTS
               SECTION 5.01.  Existence; Businesses and Properties .............  52
               SECTION 5.02.  Insurance ........................................  53
               SECTION 5.03.  Taxes and Obligations ............................  53
               SECTION 5.04.  Financial Statements, Reports, etc ...............  53
               SECTION 5.05.  Litigation and Other Notices .....................  55
               SECTION 5.06.  ERISA ............................................  55
               SECTION 5.07.  Maintaining Records; Access to Properties and
                              Inspections ......................................  56
               SECTION 5.08.  Use of Proceeds ..................................  56
               SECTION 5.09.  Pledge of Avista Capital, Inc ....................  56

VI.  NEGATIVE COVENANTS
               SECTION 6.01.  Liens ....................................... ....  57
               SECTION 6.02.  Mergers, Consolidations and Acquisitions..........  61
               SECTION 6.03.  Disposition of Assets.............................  62
</TABLE>

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<TABLE>
Article        Section                                                            Page
-------        -------                                                            ----
<S>            <C>                                                                <C>
               SECTION 6.04.  Consolidated Total Debt to Consolidated Total
                              Capitalization Ratio. ............................  63
               SECTION 6.05.  Consolidated Fixed Charge Coverage Ratio..........  63
               SECTION 6.06.  Public Utility Regulatory Borrowing Limits........  63
               SECTION 6.07.  Investments. .....................................  63
               VII.  EVENTS OF DEFAULT..........................................  64
               VIII. THE AGENT..................................................  67

IX.  MISCELLANEOUS
               SECTION 9.01.  Notices ..........................................  70
               SECTION 9.02.  Survival of Agreement ............................  71
               SECTION 9.03.  Binding Effect ...................................  71
               SECTION 9.04.  Successors and Assigns ...........................  71
               SECTION 9.05.  Expenses; Indemnity ..............................  75
               SECTION 9.06.  Right of Setoff ..................................  76
               SECTION 9.07.  Applicable Law ...................................  77
               SECTION 9.08.  Waivers; Amendment ...............................  77
               SECTION 9.09.  Interest Rate Limitation .........................  78
               SECTION 9.10.  Entire Agreement .................................  78
               SECTION 9.11.  Waiver of Jury Trial .............................  78
               SECTION 9.12.  Severability .....................................  78
               SECTION 9.13.  Counterparts .....................................  79
               SECTION 9.14.  Headings..........................................  79
               SECTION 9.15.  Jurisdiction; Consent to Service of Process ......  79
               SECTION 9.16.  Pledge Release Date ..............................  80

References
----------

Exhibit A      Form of Note
Exhibit B      Form of Assignment and Acceptance
Exhibit C      Form of Administrative Questionnaire
Exhibit D      Form of Opinion of Counsel for the Borrower
Schedule 2.01  Banks
Schedule 3.14  Significant Subsidiaries
</TABLE>

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<TABLE>
Article            Section                                                        Page
-------            -------                                                        ----
<S>                <C>                                                            <C>
Schedule 4.02(b)   Statutes and Orders of Governmental Authorities
</TABLE>

                                      -iv-

<PAGE>   6

                   AMENDED AND RESTATED CREDIT AGREEMENT dated as of May 31,
               2001, among AVISTA CORPORATION, a Washington corporation (herein
               called the "Borrower"), the banks listed in Schedule 2.01 (the
               "Banks"), TORONTO DOMINION (TEXAS), INC., as agent for the Banks
               (in such capacity, the "Agent"), and THE BANK OF NEW YORK, as
               documentation agent (the "Documentation Agent").

            Pursuant to the Pre-Restatement Credit Agreements (as defined
herein), certain banks have extended credit to, and/or issued letters of credit
on behalf of, the Borrower. The Borrower has requested that the Pre-Restatement
Credit Agreements be amended, restated and combined in the form of this
Agreement and that the Banks extend credit to the Borrower in order to enable
the Borrower to borrow on a standby revolving credit basis and obtain letters of
credit on and after the date hereof, at any time prior to the Expiration Date
(as defined herein) in a principal amount not in excess of $220,000,000 at any
time outstanding (subject to a possible increase to $260,000,000, as provided in
Section 2.01(b) below). The proceeds of such borrowings and such letters of
credit are to be used for general corporate purposes. In consideration of the
mutual covenants and agreements contained herein, the parties agree as follows:

ARTICLE I. DEFINITIONS

            SECTION 1.01. Defined Terms. As used in this Agreement, the
following terms shall have the meanings specified below:

            "ABR" when used in reference to any Loan or Borrowing, refers to
whether such Loan, or the Loans comprising such Borrowing, are bearing interest
at a rate determined by reference to the Alternate Base Rate.

            "ABR Borrowing" shall mean a Borrowing comprised of ABR Loans.

            "ABR Loan" shall mean any Loan bearing interest at a rate determined
by reference to the Alternate Base Rate in accordance with the provisions of
Article II.

            "Administrative Questionnaire" shall mean an Administrative
Questionnaire in the form of Exhibit C.
<PAGE>   7
                                                                               2

            "Affiliate" shall mean, when used with respect to a specified
person, another person that directly, or indirectly through one or more
intermediaries, Controls or is Controlled by or is under common Control with the
person specified.

            "Alternate Base Rate" shall mean, for any day, a rate per annum
(rounded upwards, if necessary, to the nearest 1/16 of 1%) equal to the greater
of (a) the Prime Rate (computed on the basis of the actual number of days
elapsed over a year of 365 or 366 days, as the case may be) in effect on such
day and (b) the sum of (i) the Federal Funds Effective Rate in effect for such
day plus (ii) 1/2 of 1%. If for any reason the Agent shall have determined
(which determination shall be conclusive absent manifest error) that it is
unable to ascertain the Federal Funds Effective Rate for any reason, the
Alternate Base Rate shall be determined without regard to clause (b) of the
first sentence of this definition until the circumstances giving rise to such
inability no longer exist.

            "Applicable Percentage" shall mean, with respect to any Bank, the
percentage of the total Commitments represented by such Bank's Commitment. If
the Commitments have terminated or expired, the Applicable Percentage shall be
determined based upon the Commitments most recently in effect, giving effect to
any assignments.

            "Applicable Rate" shall mean on any date, with respect to any ABR
Loan or Eurodollar Revolving Loan, or with respect to the Commitment Fees, the
Letter of Credit participation fees or the Utilization Fees payable hereunder,
as the case may be, the applicable rate per annum set forth below under the
caption "ABR Spread," "Eurodollar Spread," "Commitment Fee", "Letter of Credit
Participation Fees" or "Utilization Fees", as the case may be, based upon the
Ratings or the Utilization Level, as the case may be:

            (a) Loan Spreads, Commitment Fee and Letters of Credit Participation
Fees:

<TABLE>
<CAPTION>
                                                                           Letter of
                                 ABR      Eurodollar    Commitment    Credit Participation
        Ratings                Spread       Spread         Fee                Fees
        -------                ------     ----------    ----------    --------------------
<S>                            <C>        <C>           <C>           <C>
  Level 1                      0.000%     1.0000%       0.200%          1.0000%

  BBB+ or greater by
  S&P; and Baa1 or
  greater by Moody's
</TABLE>

<PAGE>   8
                                                                               3

<TABLE>
<CAPTION>
                                                                           Letter of
                                 ABR      Eurodollar    Commitment    Credit Participation
        Ratings                Spread       Spread         Fee                Fees
        -------                ------     ----------    ----------    --------------------
<S>                            <C>        <C>           <C>           <C>
Level 2                        0.250%     1.250%        0.250%           1.250%

BBB by S&P; and
Baa2 by Moody's

Level 3                        0.500%     1.500%        0.400%           1.500%

BBB- by S&P; and
Baa3 by Moody's

Level 4                        0.875%     1.875%        0.500%           1.875%

BB+ by S&P; and Ba1
by Moody's

Level 5                        1.250%     2.250%        0.700%           2.250%

Lower than BB+ by
S&P; and lower than
Ba1 by Moody's
</TABLE>

        For purposes of the foregoing, (i) if the Ratings in effect on any date
        fall in different Levels, the Applicable Rate shall be determined on
        such date by reference to the inferior (numerically higher) Level,
        unless the Ratings differ by more than one Level, in which case the
        applicable Level shall be the Level next below the superior (numerically
        lower) of the two; (ii) if either Moody's or S&P shall not have in
        effect a Rating (other than because such rating agency shall no longer
        be in the business of rating corporate debt obligations), then such
        rating agency will be deemed to have established a Rating in Level 5;
        and (iii) if any rating established or deemed to have been established
        by Moody's or S&P shall be changed (other than as a result of a change
        in the rating system of either Moody's or S&P), such change shall be
        effective as of the day after the date on which such change is first
        announced by the rating agency making such change. Each change in the
        Applicable Rate shall apply during the period commencing on the
        effective date of such change and ending on the date immediately
        preceding the effective date of the next such change. If the rating
        system of either Moody's or S&P shall change, or if either such rating
        agency shall cease to be in the business of rating corporate debt
        obligations, the Borrower and the Banks shall negotiate in good faith to
        amend the references to specific ratings in this definition to reflect
        such changed rating system or the non-availability of ratings from such
        rating agency.
<PAGE>   9
                                                                               4

        (b) Utilization Fees:

<TABLE>
<CAPTION>
                         Utilization Level
                    (calculated as set forth in
                         Section 2.07(e))                       Utilization Fee
                    ---------------------------                 ---------------
<S>         <C>                                                 <C>
            Level 1                                                 .15%

            >33% and [less than or equal to] 50%

            Level 2                                                 .25%

            >50% and [less than or equal to] 75%

            Level 3                                                 .50%

            >75%
</TABLE>

            "Assignment and Acceptance" shall mean an assignment and acceptance
entered into by a Bank and an assignee, and accepted by the Agent and the
Borrower, in the form of Exhibit B or such other form as shall be approved by
the Agent.

            "Attributable Debt" shall mean, in connection with any sale and
leaseback transaction, the present value (discounted in accordance with GAAP at
the discount rate implied in the lease) of the obligations of the lessee for
rental payments during the term of the lease.

            "Auction Bid" shall mean an offer by a Bank to make an Auction Loan
in accordance with Section 2.04.

            "Auction Bid Rate" shall mean, with respect to any Auction Bid, the
Margin for Eurodollar Auction Loans, the Fixed Rate for Fixed Rate Loans or the
Delayed Fixed Rate for Delayed Fixed Rate Loans, as applicable, offered by the
Bank in making such Auction Bid.

            "Auction Bid Request" shall mean a request by the Borrower for
Auction Bids in accordance with Section 2.04.
<PAGE>   10
                                                                               5

            "Auction Facility" shall mean the facility described in Section
2.04.

            "Auction Loan" shall mean a Loan made pursuant to Section 2.04.

            "Availability Period" shall mean the period from and including the
Closing Date to but excluding the earlier of the Expiration Date and the date of
the termination of the Commitments.

            "Avista Utilities" means the operating division of the Borrower
which represents all the regulated utility operations of the Borrower that are
responsible for retail electric and natural gas distribution, electric
transmission services and electric generation and production.

            "Board" shall mean the Board of Governors of the Federal Reserve
System of the United States.

            "Borrowing" shall mean (a) a group of Revolving Loans of the same
Type, made, converted or continued on the same date and, in the case of
Eurodollar Loans, as to which a single Interest Period is in effect or (b) an
Auction Loan or group of Auction Loans of the same Type made on the same date
and as to which a single Interest Period is in effect.

            "Business Day" shall mean any day (other than a day which is a
Saturday, Sunday or legal holiday in the State of New York) on which banks are
open for business in New York City; provided that when used in connection with a
Eurodollar Loan the term "Business Day" shall also exclude any day on which
banks are not open for dealings in deposits in dollars in the London interbank
market.

            "Capital Lease Obligations" of any person shall mean the obligations
of such person to pay rent or other amounts under any lease of (or other
arrangement conveying the right to use) real or personal property, or a
combination thereof, which obligations are required to be classified and
accounted for as capital leases on a balance sheet of such person under GAAP
and, for the purposes of this Agreement, the amount of such obligations at any
time shall be the capitalized amount thereof at such time determined in
accordance with GAAP.

            "Change in Control" means (a) the acquisition of ownership, directly
or indirectly, beneficially or of record, by any Person or group (within the
meaning of the Securities Exchange Act of 1934 and the rules of the Securities
and Exchange
<PAGE>   11
                                                                               6

Commission thereunder as in effect on the date hereof), of shares representing
more than 30% of the aggregate ordinary voting power represented by the issued
and outstanding capital stock of the Borrower; or (b) occupation of a majority
of the seats (other than vacant seats) on the board of directors of the Borrower
by Persons who were neither (i) nominated by the board of directors of the
Borrower nor (ii) appointed by directors so nominated; provided, that no event
described in clause (a) or clause (b) shall constitute a "Change in Control" if
the senior secured long-term debt rating of the Borrower shall be at least BBB
or higher by S&P and Baa2 or higher by Moody's immediately after giving effect
to the transaction that would otherwise constitute a Change in Control.

            "Class", when used in reference to any Loan or Borrowing, refers to
whether such Loan, or the Loans comprising such Borrowing, are Revolving Loans
or Auction Loans.

            "Closing Date" shall mean the date of this Agreement.

            "Code" shall mean the Internal Revenue Code of 1986, as the same may
be amended from time to time.

            "Commitment" shall mean, with respect to each Bank, the commitment
of such Bank to make Revolving Loans and to acquire participations in Letters of
Credit hereunder as set forth in Sections 2.01 and 2.06, as the same may be
reduced from time to time pursuant to Section 2.11.

            "Commitment Fee" shall have the meaning assigned to such term in
Section 2.07(a).

            "Consolidated Cash Flow" means, with respect to Avista Utilities or
the Borrower and its consolidated subsidiaries, as applicable, for any
four-fiscal-quarter period, Consolidated Net Income of (i) Avista Utilities or
(ii) the Borrower and its consolidated subsidiaries, as applicable, for such
period (excluding earnings from any subsidiaries which have contractual
restrictions on distributions) plus, without duplication and, in the case of
clauses (a), (b), (c), (d) and (f), to the extent deducted in computing such
Consolidated Net Income, the sum for such period of (a) income tax expense, (b)
interest expense, (c) depreciation and amortization expense, (d) any
extraordinary or non-recurring losses, (e) any decrease (on an after-tax basis)
in gas and electric deferrals as of the last day of such period from the gas and
electric deferrals as of the date that is 12 months earlier, (f) other non-cash
items reducing such Consolidated Net Income, and (g) all cash on the balance
sheet as of the last day of such period (net of all outstanding
<PAGE>   12
                                                                               7

Loans), minus, without duplication and, in the case of clauses (i) and (iii), to
the extent added in computing such Consolidated Net Income, the sum of for such
fiscal period of (i) any extraordinary or non-recurring gains, (ii) any increase
(on an after-tax basis) in gas and electric deferrals as of the last day of such
period over gas and electric deferrals as of the date that is 12 months earlier
and (iii) other non-cash items increasing such Consolidated Net Income, all as
determined on a consolidated basis in accordance with GAAP.

            "Consolidated Fixed Charges" means, with respect to (i) Avista
Utilities or (ii) the Borrower and its consolidated subsidiaries, as applicable,
for any four-fiscal-quarter period, the aggregate of all payments by Avista
Utilities or the Borrower and its consolidated subsidiaries, as applicable, for
such period, that, in accordance with GAAP, are or should be included in
interest paid, net of amounts capitalized, and capital lease interest paid
reflected in the statement of cash flows for Avista Utilities or the Borrower
and its consolidated subsidiaries, as applicable, less the amount of capital
lease interest paid to Avista Utilities or the Borrower or any consolidated
subsidiary, as applicable, for such period that is not reflected in Consolidated
Cash Flow of Avista Utilities or the Borrower and its consolidated subsidiaries,
as applicable, for such period, all as determined on a consolidated basis in
accordance with GAAP.

            "Consolidated Net Income" means, with respect to (i) Avista
Utilities or (ii) the Borrower and its consolidated subsidiaries, as applicable,
for any four-fiscal-quarter period, the net income or loss of Avista Utilities
or the Borrower and its consolidated subsidiaries, as applicable, for such
period determined on a consolidated basis in accordance with GAAP; provided that
there shall be excluded (a) the income of any person which has any contractual
restriction on dividends and (b) the income or loss of any person accrued prior
to the date it becomes a subsidiary or is merged into or consolidated with the
Borrower or any applicable subsidiary or the date that such person's assets are
acquired by the Borrower or any applicable subsidiary.

            "Consolidated Total Capitalization" on any date means the sum,
without duplication, of the following with respect to the Borrower and its
consolidated subsidiaries: (a) total capitalization as of such date, as
determined in accordance with GAAP, (b) the current portion of liabilities which
as of such date would be classified in whole or part as long-term debt in
accordance with GAAP (it being understood that the noncurrent portion of such
liabilities is included in the total capitalization referred to in clause (a)),
(c) all obligations as lessee which, in accordance with GAAP, are capitalized as
liabilities (including the current portion thereof), and (d) all other
liabilities which would be classified as short-term debt in accordance with
GAAP.
<PAGE>   13
                                                                               8

            "Consolidated Total Debt" on any date means the sum, without
duplication, of the following with respect to the Borrower and its consolidated
subsidiaries: (a) all liabilities which as of such date would be classified in
whole or in part as long-term debt in accordance with GAAP (including the
current portion thereof), (b) all obligations as lessee which, in accordance
with GAAP, are capitalized as liabilities (including the current portion
thereof), (c) all other liabilities which would be classified as short-term debt
in accordance with GAAP, and (d) all Guarantees of or by the Borrower.

            "Control" shall mean the possession, directly or indirectly, of the
power to direct or cause the direction of the management or policies of a
person, whether through the ownership of voting securities, by contract or
otherwise, and "Controlling" and "Controlled" shall have meanings correlative
thereto.

            "Default" shall mean any event or condition which upon notice, lapse
of time or both would constitute an Event of Default.

            "Delayed Fixed Rate" shall mean, with respect to any Auction Loan
(other than a Eurodollar Auction Loan or a Fixed Rate Loan), the fixed rate of
interest per annum specified by the Bank in making such Auction Loan in its
related Auction Bid.

            "Delayed Fixed Rate Loan" shall mean an Auction Loan bearing
interest at a Delayed Fixed Rate for which an Auction Bid Request is made two
Business Days before the proposed date of borrowing.

            "dollars" or "$" shall mean lawful money of the United States of
America.

            "Environmental Law" shall mean any and all applicable present and
future treaties, laws, regulations, enforceable requirements, binding
determinations, orders, decrees, judgments, injunctions, permits, approvals,
authorizations, licenses, permissions, notices or binding agreements issued,
promulgated or entered by any Governmental Authority, relating to the
environment, preservation or reclamation of natural resources, or to the
management, release or threatened release of contaminants or noxious odor,
including the Hazardous Materials Transportation Act, Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended by
the Superfund Amendments and Reauthorization Act of 1986, Solid Waste Disposal
Act, as amended by the Resource Conservation and Recovery Act of 1976 and
Hazardous and Solid Waste Amendments of 1984, Federal Water Pollution Control
Act, as amended by the Clean Water Act of 1977, Clean Air Act of 1970, as
amended, Toxic Substances Control Act of
<PAGE>   14
                                                                               9

1976, Occupational Safety and Health Act of 1970, as amended, Emergency Planning
and Community Right-to-Know Act of 1986, Safe Drinking Water Act of 1974, as
amended, and any similar or implementing state law, and all amendments or
regulations promulgated thereunder.

            "Equity Interests" shall mean shares of stock, partnership
interests, membership interests in a limited liability company, beneficial
interests in a trust or other equity ownership interests in a person, and all
options, warrants or other rights to acquire any such equity ownership interests
in a person.

            "ERISA" shall mean the Employee Retirement Income Security Act of
1974, as the same may be amended from time to time.

            "ERISA Affiliate" shall mean any trade or business (whether or not
incorporated) that is a member of a group of which the Borrower is a member and
which is treated as a single employer under Section 414 of the Code.

            "Eurodollar", when used in reference to any Loan or Borrowing,
refers to whether such Loan, or the Loans comprising such Borrowing, are bearing
interest at a rate determined by reference to the Eurodollar Rate.

            "Eurodollar Borrowing" shall mean a Borrowing comprised of
Eurodollar Loans.

            "Eurodollar Loan" shall mean any Loan bearing interest at a rate
determined by reference to the Eurodollar Rate in accordance with the provisions
of Article II.

            "Eurodollar Rate" shall mean, with respect to any Eurodollar Loan
for any Interest Period, an interest rate per annum (rounded upwards, if
necessary, to the next 1/100 of 1%) equal to the product of (i) the arithmetic
average of rates at which dollar deposits approximately equal to the principal
amount of the portion of such Eurodollar Loan to be made by The Toronto-Dominion
Bank, and for a maturity equal to the applicable Interest Period, are offered to
The Toronto-Dominion Bank for Eurodollars at approximately 10:00 a.m., New York
City time, two Business Days prior to the commencement of such Interest Period
and (ii) Statutory Reserves. In the event that such rate is not available at
such time for any reason, then the "Eurodollar Rate" with respect to such
Eurodollar Borrowing for such Interest Period shall be the rate at which dollar
deposits of $5,000,000 and for a maturity comparable to such Interest Period are
offered
<PAGE>   15
                                                                              10

by the principal London office of the Agent in immediately available funds in
the London interbank market at approximately 10:00 a.m., New York City time, two
Business Days prior to the commencement of such Interest Period.

            "Event of Default" shall have the meaning assigned to such term in
Article VII.

            "Expiration Date" shall mean May 29, 2002.

            "Federal Funds Effective Rate" shall mean, for any day, the weighted
average of the rates on overnight Federal funds transactions with members of the
Federal Reserve System arranged by Federal funds brokers, as reported on such
Business Day by the Federal Reserve Bank of New York, or, if such rate is not so
reported for any day that is a Business Day, the average of the quotations for
the day of such transactions received by the Agent from three Federal funds
brokers of recognized standing selected by it.

            "Fees" shall mean the Commitment Fee and the other fees referred to
in Section 2.07.

            "Financial Officer" of any corporation shall mean the chief
financial officer or Treasurer of such corporation.

            "First Mortgage" shall mean the Mortgage and Deed of Trust dated as
of June 1, 1939, made by the Borrower in favor of Citibank, N.A., as successor
Trustee, as the same has been amended, modified or supplemented to date and as
the same may be further amended, modified or supplemented from time to time
hereafter.

            "Fixed Rate" shall mean, with respect to any Auction Loan (other
than a Eurodollar Auction Loan or a Delayed Fixed Rate Loan), the fixed rate of
interest per annum specified by the Bank making such Auction Loan in its related
Auction Bid.

            "Fixed Rate Loan" shall mean an Auction Loan bearing interest at a
Fixed Rate for which an Auction Bid Request is made on the day of the proposed
borrowing.

            "GAAP" shall mean generally accepted accounting principles, applied
on a consistent basis.

            "Governmental Authority" shall mean any Federal, state, local or
foreign court or governmental agency, authority, instrumentality or regulatory
body.
<PAGE>   16
                                                                              11

            "Guarantee" of or by any person shall mean any obligation,
contingent or otherwise, of such person guaranteeing or having the economic
effect of guaranteeing any Indebtedness of any other person (the "primary
obligor") in any manner, whether directly or indirectly, and including any
obligation of such person, direct or indirect, (a) to purchase or pay (or
advance or supply funds for the purchase or payment of) such Indebtedness or to
purchase (or to advance or supply funds for the purchase of) any security for
the payment of such Indebtedness, (b) to purchase property, securities or
services for the purpose of assuring the owner of such Indebtedness of the
payment of such Indebtedness or (c) to maintain working capital, equity capital
or other financial statement condition or liquidity of the primary obligor so as
to enable the primary obligor to pay such Indebtedness; provided, however, that
the term Guarantee shall not include endorsements for collection or deposit, in
either case in the ordinary course of business.

            "Indebtedness" of any person shall mean, without duplication, (a)
all obligations of such person for borrowed money or with respect to deposits or
advances of any kind, (b) all obligations of such person evidenced by bonds,
debentures, notes or similar instruments, (c) all obligations of such person
upon which interest charges are customarily paid, (d) all obligations of such
person under conditional sale or other title retention agreements relating to
property or assets purchased by such person, (e) all obligations of such person
issued or assumed as the deferred purchase price of property or services (other
than trade payables incurred in the ordinary course of business), (f) all
Indebtedness of others secured by (or for which the holder of such Indebtedness
has an existing right, contingent or otherwise, to be secured by) any Lien on
property owned or acquired by such person, whether or not the obligations
secured thereby have been assumed, but limited, if such obligations are without
recourse to such person, to the lesser of the principal amount of such
Indebtedness or the fair market value of such property, (g) all Guarantees by
such person of Indebtedness of others, (h) all Capital Lease Obligations of such
person, (i) all obligations of such person in respect of interest rate
protection agreements, foreign currency exchange agreements or other interest or
exchange rate hedging arrangements (the amount of any such obligation to be the
amount that would be payable upon the acceleration, termination or liquidation
thereof) and (j) all obligations of such person as an account party in respect
of letters of credit and bankers' acceptances. The Indebtedness of any person
shall include the Indebtedness of any partnership in which such person is a
general partner.

            "Interest Payment Date" shall mean, with respect to any Loan, the
last day of the Interest Period applicable to the Borrowing of which such Loan
is a part and, in addition, the date of any refinancing or conversion of such
Borrowing with or to a Borrowing of a different Type, and (a) in the case of a
Eurodollar Borrowing with an
<PAGE>   17
                                                                              12

Interest Period of more than three months' duration, each day that would have
been an Interest Payment Date had successive Interest Periods of three months'
duration been applicable to such Borrowing and (b) in the case of a Fixed Rate
Borrowing or Delayed Fixed Rate Borrowing with an Interest Period of more than
90 days' duration (unless otherwise specified in the applicable auction Bid
Request), each day prior to the last day of such Interest Period that occurs at
intervals of 90 days' duration after the first day of such Interest Period, and
any other dates that are specified in the applicable Auction Bid Request as
Interest Payment Dates with respect to such Borrowing.

            "Interest Period" shall mean (a) as to any Eurodollar Borrowing, the
period commencing on the date of such Borrowing and ending on the numerically
corresponding day (or, if there is no numerically corresponding day, on the last
day) in the calendar month that is 1, 2, 3 or 6 months thereafter, as the
Borrower may elect, (b) as to any ABR Borrowing, the period commencing on the
date of such Borrowing and ending on the earliest of (i) the next succeeding
March 31, June 30, September 30 or December 31, (ii) the Expiration Date, and
(iii) the date such Borrowing shall be repaid or prepaid in accordance with
Section 2.12 and (c) with respect to any Fixed Rate Borrowing or Delayed Fixed
Rate Borrowing, the period (which shall not be less than 7 days or more than 360
days) commencing on the date of such Borrowing and ending on the date specified
in the applicable Auction Bid Request; provided, however, that if any Interest
Period would end on a day other than a Business Day, such Interest Period shall
be extended to the next succeeding Business Day unless, in the case of a
Eurodollar Borrowing only, such next succeeding Business Day would fall in the
next calendar month, in which case such Interest Period shall end on the next
preceding Business Day. Interest shall accrue from and including the first day
of an Interest Period to but excluding the last day of such Interest Period.

            "Issuing Bank" shall mean The Toronto-Dominion Bank in its capacity
as the issuer of Letters of Credit hereunder, and its successors in such
capacity as provided in Section 2.06(i). The Issuing Bank may, in its
discretion, arrange for one or more Letters of Credit to be issued by Affiliates
of the Issuing Bank, in which case the term "Issuing Bank" shall include any
such Affiliate with respect to Letters of Credit issued by such Affiliate.

            "LC Disbursement" shall mean a payment made by the Issuing Bank
pursuant to a Letter of Credit.

            "LC Exposure" shall mean, at any time, the sum of (a) the aggregate
undrawn amount of all outstanding Letters of Credit at such time plus (b) the
aggregate
<PAGE>   18
                                                                              13

amount of all LC Disbursements that have not yet been reimbursed by or on behalf
of the Borrower at such time. The LC Exposure of any Bank at any time shall be
its Applicable Percentage of the total LC Exposure at such time.

            "Letter of Credit" shall mean any letter of credit issued pursuant
to this Agreement.

            "Lien" shall mean, with respect to any asset, (a) any mortgage, deed
of trust, lien, pledge, encumbrance, charge or security interest in or on such
asset, (b) the interest of a vendor or a lessor under any conditional sale
agreement, capital lease or title retention agreement relating to such asset and
(c) in the case of securities, any purchase option, call or similar right of a
third party with respect to such securities.

            "Loan Documents" shall mean this Agreement, the Pledge Agreement,
any Notes and any Letter of Credit applications referred to in Section 2.06(a).

            "Loans" shall mean loans made by the Banks to the Borrower pursuant
to this Agreement.

            "Margin" shall mean, with respect to any Auction Loan bearing
interest at a rate based on the Eurodollar Rate, the marginal rate of interest,
if any, to be added to or subtracted from the Eurodollar Rate to determine the
rate of interest applicable to such Loan, as specified by the Bank making such
Loan in its related Auction Bid.

            "Margin Stock" shall have the meaning given such term under
Regulation U.

            "Material Adverse Effect" shall mean an effect on the business,
assets, operations or financial condition of the Borrower and the Subsidiaries
taken as a whole which could reasonably be expected to have a material adverse
effect on the creditworthiness of the Borrower.

            "Moody's" shall mean Moody's Investors Service, Inc.

            "Notes" shall mean any promissory notes of the Borrower,
substantially in the form of Exhibit A, evidencing Loans, as may be delivered
pursuant to Section 2.05.

            "PBGC" shall mean the Pension Benefit Guaranty Corporation referred
to and defined in ERISA.
<PAGE>   19
                                                                              14

            "person" shall mean a corporation, association, partnership, trust,
limited liability company, organization, business, individual or government or
governmental agency or political subdivision thereof.

            "Plan" shall mean any pension plan subject to the provisions of
Title IV of ERISA or Section 412 or the Code which is maintained for employees
of the Borrower or any ERISA Affiliate.

            "Pledge Agreement" shall mean the Amended and Restated Pledge
Agreement dated the date hereof between the Borrower and the Agent relating to
the pledge of all the outstanding Equity Interests in Avista Capital, Inc., to
the Agent for the benefit of the Agent and the Banks.

            "Pledge Release Date" shall mean the earlier of (a) the first date
on which the Rating from S&P shall be not less than A- and the Rating from
Moody's shall be not less than A3 and (b) the date on which the Borrower sells,
transfers or otherwise disposes of all the Equity Interests in Avista Capital,
Inc., in a transaction not prohibited by this Agreement.

            "Pre-Restatement Credit Agreements" shall mean each of the Revolving
Credit Agreement ($120,000,000) (364 Day) and the Revolving Credit Agreement
($140,000,000) (364 Day), in each case, among the Borrower, the banks named
therein, Toronto Dominion (Texas), Inc., Bank of America, N.A., and The Bank of
New York, dated as of June 26, 2000, and as in effect prior to its amendment,
restatement and combination hereby.

            "Prime Rate" shall mean the rate of interest per annum adopted from
time to time by The Toronto-Dominion Bank at its principal office in New York
City as its prime rate. For purposes of this Agreement, any change in the
Alternate Base Rate due to a change in the Prime Rate shall be effective on the
date such change in the Prime Rate is adopted.

            "Ratings" shall refer to the ratings of Moody's and S&P applicable
to the Borrower's senior unsecured long-term debt obligations.

            "Register" shall have the meaning given to such term in Section
9.04(d).

            "Regulation D" shall mean Regulation D of the Board as from time to
time in effect and all official rulings and interpretations thereunder or
thereof and shall include
<PAGE>   20
                                                                              15

any successor or other regulation or official interpretation of the Board
relating to reserve requirements applicable to member banks of the Federal
Reserve System.

            "Regulation U" shall mean Regulation U of the Board as from time to
time in effect and all official rulings and interpretations thereunder or
thereof.

            "Regulation X" shall mean Regulation X of the Board as from time to
time in effect and all official rulings and interpretations thereunder or
thereof.

            "Related Parties" shall mean, with respect to any specified Person,
such Person's Affiliates and the respective directors, officers, employees,
agents and advisors of such Person and such Person's Affiliates.

            "Reportable Event" shall mean any reportable event as defined in
Section 4043(b) of ERISA or the regulations issued thereunder with respect to a
Plan (other than a Plan maintained by an ERISA Affiliate which is considered an
ERISA Affiliate only pursuant to subsection (m) or (o) of Section 414 of the
Code).

            "Required Banks" shall mean, at any time, Banks having Revolving
Credit Exposures representing at least 66-2/3% of the aggregate Revolving
Exposures or, if there shall be no Revolving Credit Exposure, Banks having
Commitments representing at least 66-2/3% of the aggregate Commitments. For
purposes of declaring the Loans to be due and payable pursuant to Article VII
and of demanding the deposit of cash collateral pursuant to Section 2.06(i), and
for all purposes after the Loans become due and payable pursuant to Article VII
or the Commitments expire or terminate, the outstanding Auction Loans of the
Banks shall be included in their respective Revolving Credit Exposure in
determining the Required Banks.

            "Responsible Officer" of any corporation shall mean any executive
officer or Financial Officer of such corporation and any other officer or
similar official thereof responsible for the administration of the obligations
of such corporation in respect of this Agreement.

            "Revolving Credit Exposure" shall mean, with respect to any Bank at
any time, the sum of the outstanding principal amount of such Bank's Revolving
Loans and its LC Exposure at such time.

            "Revolving Loan" shall mean a Loan made pursuant to Section 2.03.
<PAGE>   21
                                                                              16

            "RTO Transaction" shall mean any sale, transfer or other disposition
of transmission assets entered into in connection with the formation of a
regional transmission organization pursuant to or in a manner consistent with
regulatory requirements applicable to the Borrower.

            "S&P" shall mean Standard & Poor's Ratings Services.

            "Significant Subsidiary" shall mean a Subsidiary meeting any one of
the following conditions: (a) the investments in and advances to such Subsidiary
by the Borrower and the other Subsidiaries, if any, as at the end of the
Borrower's latest fiscal quarter exceeded 10% of the total assets of the
Borrower and its Subsidiaries at such date, computed and consolidated in
accordance with GAAP; or (b) the Borrower's and the other Subsidiaries'
proportionate share of the total assets (after intercompany eliminations) of
such Subsidiary as at the end of the Borrower's latest fiscal quarter exceeded
10% of the total assets of the Borrower and its Subsidiaries at such date,
computed and consolidated in accordance with GAAP; or (c) the equity in the
income from continuing operations before income taxes, extraordinary items and
cumulative effect of a change in accounting principles of such Subsidiary for
the period of four consecutive fiscal quarters ending at the end of the
Borrower's latest fiscal quarter exceeded 10% of such income of the Borrower and
its Subsidiaries for such period, computed and consolidated in accordance with
GAAP; or (d) such Subsidiary is the parent of one or more Subsidiaries and,
together with such Subsidiaries would, if considered in the aggregate,
constitute a Significant Subsidiary.

            "Statutory Reserves" shall mean a fraction (expressed as a decimal)
the numerator of which is the number one and the denominator of which is the
number one minus the aggregate of the maximum reserve percentages (including,
without limitation, any marginal, special, emergency or supplemental reserves)
with respect to Eurodollar funding (including with respect to Eurocurrency
Liabilities as defined in Regulation D) in an amount approximately equal to the
respective Eurodollar Loan and with a term approximately equal to the Interest
Period for such Eurodollar Loan expressed as a decimal established by the Board
or by any other United States banking authority to which the Agent is subject.
Such reserve percentages shall include, without limitation, those imposed under
Regulation D. Statutory Reserves shall be adjusted automatically on and as of
the effective date of any change in any reserve percentage.

            "subsidiary" shall mean, for any person (the "Parent"), any
corporation, partnership or other entity of which securities or other ownership
interests having by the terms thereof ordinary voting power to elect a majority
of the board of directors or other
<PAGE>   22
                                                                              17

persons performing similar functions of such corporation, partnership or other
entity (irrespective of whether or not at the time securities or other ownership
interests of any other class or classes of such corporation, partnership or
other entity shall have or might have voting power by reason of the happening of
any contingency) are at the time directly or indirectly owned or controlled by
the Parent or one or more of its subsidiaries or by the Parent and one or more
of its subsidiaries.

            "Subsidiary" shall mean a subsidiary of the Borrower.

            A "Subsidiary Event" shall mean the following; provided, however,
that a Subsidiary Event shall not be deemed to have occurred if the Banks have
previously consented thereto:

               (a) any Significant Subsidiary shall fail to observe or perform
        any covenant, condition or agreement contained in Section 5.01(a) as if
        such section applied to such Significant Subsidiary, with all references
        therein to the Borrower being deemed references to such Significant
        Subsidiary;

               (b) any Significant Subsidiary shall fail to observe or perform
        any covenant, condition or agreement in Sections 5.01(b), 5.02, 5.03 or
        5.07 as if such sections applied to such Significant Subsidiary, with
        all references therein to the Borrower being deemed references to such
        Significant Subsidiary, and such default shall continue unremedied for a
        period of 30 days after notice thereof from the Agent or any Bank to the
        Borrower;

               (c) any Significant Subsidiary shall:

                   (i) merge into or consolidate with any other person, or
               permit any other person to merge into or consolidate with it, or
               purchase, lease or otherwise acquire (in one transaction or a
               series of transactions) all or substantially all of the assets of
               any other person (whether directly by purchase, lease or other
               acquisition of all or substantially all of the assets of such
               person or indirectly by purchase or other acquisition of all or
               substantially all of the capital stock of such other person)
               other than acquisitions in the ordinary course of such
               Significant Subsidiary's business, except that if, at the time
               thereof and immediately after giving effect thereto no Event of
               Default or Default shall have occurred and be continuing, then
               (A) such Significant Subsidiary may (i) merge with or into, or
               consolidate with, any Subsidiary or (ii) merge with or into, or
<PAGE>   23
                                                                              18

               consolidate with, the Borrower in a transaction in which the
               Borrower is the surviving corporation, (B) such Significant
               Subsidiary may purchase, lease or otherwise acquire from any
               Subsidiary all or substantially all of its assets and may
               purchase or otherwise acquire all or substantially all of the
               capital stock of any person who immediately thereafter is a
               Subsidiary, (C) such Significant Subsidiary may merge with or
               into, or consolidate with, any other person so long as the assets
               of such person at the time of such consolidation or merger, do
               not exceed 10% of the total assets of the Borrower and its
               Subsidiaries, after giving effect to such merger or
               consolidation, computed and consolidated in accordance with GAAP
               consistently applied, and (D) such Significant Subsidiary may
               purchase, lease or otherwise acquire any or all of the assets of
               any other person (and may purchase or otherwise acquire the
               capital stock of any other person) so long as the assets being
               purchased, leased or acquired (or the Significant Subsidiary's
               proportionate share of the assets of the person whose capital
               stock is being acquired) do not exceed 10% of the total assets of
               the Borrower and its Subsidiaries, after giving effect to such
               acquisition, computed and consolidated in accordance with GAAP
               consistently applied, or

                   (ii) sell, lease, transfer, assign or otherwise dispose of
               (in one transaction or in a series of transactions), in any
               fiscal year, assets (whether now owned or hereafter acquired)
               which, together with the amount of all sales, leases, transfers,
               assignments or dispositions by the Borrower permitted under
               Section 6.03 (other than sales, leases, transfers, assignments or
               other dispositions permitted under clauses (i) through (vi) of
               such Section), are in excess of 10% of the assets of the Borrower
               and its Subsidiaries as of the end of the most recent fiscal
               year, computed and consolidated in accordance with GAAP
               consistently applied, except (A) a Significant Subsidiary may
               sell, lease, transfer, assign or otherwise dispose of, in any
               fiscal year, assets in the ordinary course of business which,
               together with the amount of all sales, leases, transfers,
               assignments or dispositions in the ordinary course permitted
               under Section 6.03(i), do not exceed 5% of the assets of the
               Borrower and its Subsidiaries as of the end of the most recent
               fiscal year, computed and consolidated in accordance with GAAP
               consistently applied, (B) to the extent permitted in clause
               (c)(i) above and (C) any Significant Subsidiary may sell, lease,
               transfer, assign or otherwise dispose of, or create, incur,
               assume or permit to exist Liens on, receivables and related
               properties or interests therein;
<PAGE>   24
                                                                              19

provided, however, that, notwithstanding anything in this clause (c) to the
contrary, a Subsidiary Event shall not be deemed to have occurred and shall not
constitute an Event of Default under paragraph (k) of Article VII if, after
giving effect to the consummation of any transaction contemplated by clause
(c)(i) or (c)(ii) hereof, such Significant Subsidiary shall have or shall be
deemed to have a ratio of total long-term Indebtedness to total stockholders'
equity equal to or less than 1.5 to 1.0.

            "Transactions" shall have the meaning assigned to such term in
Section 3.02.

            "Type", when used in respect of any Loan or Borrowing, shall refer
to the Rate by reference to which interest on such Loan or on the Loans
comprising such Borrowing is determined. For purposes hereof, "Rate" shall mean,
in the case of a Revolving Loan or Borrowing, the Eurodollar Rate and the
Alternate Base Rate or, in the case of an Auction Loan or Borrowing, the
Eurodollar Rate, Fixed Rate or Delayed Fixed Rate.

            "Utilization Fee" shall have the meaning assigned to such term in
Section 2.07.

            SECTION 1.02. Terms Generally. The definitions in Section 1.01 shall
apply equally to both the singular and plural forms of the terms defined.
Whenever the context may require, any pronoun shall include the corresponding
masculine, feminine and neuter forms. The words "include", "includes" and
"including" shall be deemed to be followed by the phrase "without limitation".
All references herein to Articles, Sections, Exhibits and Schedules shall be
deemed references to Articles and Sections of, and Exhibits and Schedules to,
this Agreement unless the context shall otherwise require. Except as otherwise
expressly provided herein, all terms of an accounting or financial nature shall
be construed in accordance with GAAP, as in effect from time to time; provided,
however, that if the Borrower notifies the Agent that the Borrower requests an
amendment to any provision hereof to eliminate the effect of any change
occurring after the date hereof in GAAP or in the application thereof on the
operation of such provision (or if the Agent notifies the Borrower that the
Required Banks request an amendment to any provision hereof for such purpose),
regardless of whether any such notice is given before or after such change in
GAAP or in the application thereof, then such provision shall be interpreted on
the basis of GAAP as in effect and applied immediately before such change shall
have become effective until such notice shall have been withdrawn or such
provision amended in accordance herewith.
<PAGE>   25
                                                                              20

ARTICLE II. THE CREDITS

            SECTION 2.01. Commitments. (a) Subject to the terms and conditions
and relying upon the representations and warranties herein set forth, each Bank
agrees, severally and not jointly, to make Revolving Loans to the Borrower, at
any time and from time to time on or after the date of this Agreement, and until
the earlier of the Expiration Date and the termination of the Commitment of such
Bank in accordance with the terms hereof, in an aggregate principal amount at
any time outstanding that will not result in (i) the Revolving Credit Exposure
of any Bank exceeding the Commitment set forth opposite its name in Schedule
2.01 hereto, as the same may be reduced from time to time pursuant to Section
2.11, or (ii) the sum of the total Revolving Credit Exposures plus the aggregate
principal amount of outstanding Auction Loans exceeding the total Commitments.

            (b) On not more than two occasions the Borrower may by written
notice to the Administrative Agent cause New Banks (as defined below) to assume
Commitments in an aggregate amount not in excess of $40,000,000 in the aggregate
(the "New Commitments"). Each such notice shall specify (i) the date (each a
"Transition Date") on which the Borrower proposes that New Commitments shall
become effective, which shall be not less than ten Business Days after the date
on which such notice is delivered to the Administrative Agent and (ii) the
identity of each person that has agreed to assume any portion of such New
Commitments (each a "New Bank") and the amount of such New Commitments allocated
to such New Bank. Subject only to there not existing any Default or Event of
Default on such Transition Date before or after giving effect to such New
Commitments, such New Commitments shall become effective as of such Transition
Date and, if any Revolving Loans are outstanding on such Transition Date, each
Bank shall assign to the New Banks, and each of the New Banks shall purchase
from the Banks, at the principal amount thereof, such interests in the Revolving
Loans outstanding on such Transition Date as shall be necessary in order that,
after giving effect to all such assignments and purchases, such Revolving Loans
will be held by Banks and New Banks ratably in accordance with their Commitments
after giving effect to the addition of such New Commitments to the Commitments.
The Administrative Agent shall notify the Banks promptly upon receipt of the
Borrower's notice thereof of each Transition Date and in respect thereof the New
Commitments, the New Banks and, in the case of each notice to any Bank, the
respective interests in such Bank's Revolving Loans subject to the assignments
contemplated by the immediately preceding sentence. In the event that any Bank
shall incur any breakage cost as a result of making any such assignment, or that
any New Bank shall incur any reverse breakage cost as a result of taking any
such assignment, the Borrower shall indemnify it for such cost, calculated as
contemplated by Section 2.15 in the case of breakage costs and calculated based
upon the difference between the
<PAGE>   26
                                                                              21

Eurodollar Rate applicable to each assigned Revolving Loan and the cost to the
New Bank of funding its assigned interests in the case of reverse breakage
costs. It is expressly understood that no Bank shall have any obligation to
agree to an increase in the amount of the Commitment pursuant to this Section.

            (c) Within the limits set forth in the preceding sentence, the
Borrower may borrow, pay or prepay and reborrow Revolving Loans on or after the
date of this Agreement and prior to the Expiration Date, subject to the terms,
conditions and limitations set forth herein.

            SECTION 2.02. Loans. (a) Each Revolving Loan shall be made as part
of a Borrowing consisting of Revolving Loans made by the Banks ratably in
accordance with their Commitments. Each Auction Loan shall be made in accordance
with the procedures set forth in Section 2.04. The failure of any Bank to make
any Loan required to be made hereunder shall not in itself relieve any other
Bank of its obligation to lend hereunder (it being understood, however, that no
Bank shall be responsible for the failure of any other Bank to make any Loan
required to be made by such other Bank). The Loans comprising each Borrowing
shall be in an aggregate principal amount which is an integral multiple of
$1,000,000.

            (b) Subject to Section 2.10, (i) each Revolving Borrowing shall be
comprised entirely of ABR Loans or Eurodollar Loans, as the Borrower may request
pursuant to Section 2.03, and (ii) each Auction Borrowing shall be comprised
entirely of Eurodollar Loans, Fixed Rate Loans or Delayed Fixed Rate Loans as
the Borrower may request in accordance with Section 2.04. Each Bank may at its
option fulfill its Commitment with respect to any Eurodollar Loan by causing any
domestic or foreign branch or Affiliate of such Bank to make such Loan; provided
that any exercise of such option shall not affect the obligation of the Borrower
to repay such Loan in accordance with the terms of this Agreement or any
applicable Note. Borrowings of more than one Type or Class may be outstanding at
the same time; provided, however, that the Borrower shall not be entitled to
request any Borrowing which, if made, would result in an aggregate of more than
seven separate Eurodollar Loans of any Bank being outstanding hereunder at any
one time. For purposes of the foregoing, Loans having different Interest
Periods, regardless of whether they commence on the same date, shall be
considered separate Loans.

            (c) Subject to paragraph (e) below, each Bank shall make a Revolving
Loan in the amount of its pro rata portion, as determined under Section 2.16,
or, if an Auction Loan, in the relevant amount as determined under Section 2.04,
of each Borrowing hereunder on the proposed date thereof by wire transfer of
immediately
<PAGE>   27
                                                                              22

available funds to the Agent in Houston, Texas, not later than 2:00 p.m., New
York City time, and the Agent shall by 3:00 p.m., New York City time, make
available to the Borrower in immediately available funds the amounts so received
(i) by wire transfer for credit to the account of the Borrower with Bank of
America, N.A., Account Number 12332-29152; ABA # 121000358, or (ii) as otherwise
specified by the Borrower in its notice of Borrowing or, if a Borrowing shall
not occur on such date because any condition precedent herein specified shall
not have been met, return the amounts so received to the respective Banks.
Unless the Agent shall have received notice from a Bank prior to the date of any
Borrowing that such Bank will not make available to the Agent such Bank's
portion of such Borrowing, the Agent may assume that such Bank has made such
portion available to the Agent on the date of such Borrowing in accordance with
this paragraph (c) and the Agent may, in reliance upon such assumption, make
available to the Borrower on such date a corresponding amount. If and to the
extent that such Bank shall not have made such portion available to the Agent,
such Bank and the Borrower severally agree to repay to the Agent forthwith on
demand such corresponding amount together with interest thereon, for each day
from the date such amount is made available to the Borrower until the date such
amount is repaid to the Agent at (i) in the case of the Borrower the interest
rate applicable at the time to the Loans comprising such Borrowing and (ii) in
the case of such Bank, the Federal Funds Effective Rate. If such Bank shall
repay to the Agent such corresponding amount, such amount shall constitute such
Bank's Loan as part of such Borrowing for purposes of this Agreement.

            (d) Notwithstanding any other provision of this Agreement, the
Borrower shall not be entitled to request any Borrowing if the Interest Period
requested with respect thereto would end after the Expiration Date.

            (e) The Borrower may refinance all or any part of any Borrowing with
a Borrowing of the same or a different Type or Class, subject to the conditions
and limitations set forth in this Agreement. Any Borrowing or part thereof so
refinanced shall be deemed to be repaid or prepaid in accordance with Section
2.05 or 2.12, as applicable, with the proceeds of a new Borrowing, and the
proceeds of the new Borrowing, to the extent they do not exceed the principal
amount of the Borrowing being refinanced, shall not be paid by the Banks to the
Agent or by the Agent to the Borrower pursuant to paragraph (c) above.

            SECTION 2.03. Notice of Revolving Borrowings. To request a Revolving
Borrowing, the Borrower shall give the Agent written or telecopy notice (or
telephone notice promptly confirmed in writing or by telecopy) (a) in the case
of a Eurodollar Borrowing, not later than 12:00 (noon), New York City time,
three Business Days before
<PAGE>   28
                                                                              23

a proposed borrowing and (b) in the case of an ABR Borrowing, not later than
12:00 (noon), New York City time, the day of a proposed borrowing. Such notice
shall be irrevocable and shall in each case refer to this Agreement and specify
(i) whether the Borrowing then being requested is to be a Eurodollar Borrowing
or an ABR Borrowing; (ii) the date of such Borrowing (which shall be a Business
Day) and the amount thereof; and (iii) if such Borrowing is to be a Eurodollar
Borrowing, the Interest Period with respect thereto. If no election as to the
Type of Borrowing is specified in any such notice, then the requested Borrowing
shall be an ABR Borrowing. If no Interest Period with respect to any Eurodollar
Borrowing is specified in any such notice, then the Borrower shall be deemed to
have selected an Interest Period of one month's duration. If the Borrower shall
not have given notice in accordance with this Section 2.03 of its election to
refinance a Borrowing prior to the end of the Interest Period in effect for such
Borrowing, then the Borrower shall (unless such Borrowing is repaid at the end
of such Interest Period) be deemed to have given notice of an election to
refinance such Borrowing with an ABR Borrowing. The Agent shall promptly advise
the Banks of any notice given pursuant to this Section 2.03 and of each Bank's
portion of the requested Borrowing.

            SECTION 2.04. Auction Bid Procedure. (a) Subject to the terms and
conditions set forth herein, from time to time during the Availability Period
the Borrower may request Auction Bids and may (but shall not have any obligation
to) accept Auction Bids and borrow Auction Loans; provided that the sum of the
total Revolving Credit Exposures plus the aggregate principal amount of
outstanding Auction Loans at any time shall not exceed the total Commitments. To
request Auction Bids, the Borrower shall notify the Agent of such request by
telephone, in the case of a Eurodollar Borrowing, not later than 1:00 p.m., New
York City time, four Business Days before the date of the proposed Borrowing, in
the case of a Fixed Rate Borrowing, not later than 1:00 p.m., New York City
time, one Business Day before the date of the proposed Borrowing, or, in the
case of a Delayed Fixed Rate Borrowing, not later than 2:00 p.m., New York City
time, two Business Days before the date for the proposed Borrowing; provided
that the Borrower may submit up to (but not more than) (i) 1 Eurodollar Auction
Bid Request and (ii) 1 Fixed Rate Auction Bid Request or 1 Delayed Fixed Rate
Auction Bid Request on the same day. Each such telephonic Auction Bid Request
shall be confirmed promptly by hand delivery or telecopy to the Agent of a
written Auction Bid Request in a form approved by the Agent and signed by the
Borrower. Each such telephonic and written Auction Bid Request shall specify the
following information in compliance with Section 2.02:

               (i)    the aggregate amount of the requested Borrowing;

<PAGE>   29
                                                                              24

               (ii) the date of such Borrowing, which shall be a Business Day;

               (iii) whether such Borrowing is to be a Eurodollar Borrowing, a
        Fixed Rate Borrowing, or a Delayed Fixed Rate Borrowing;

               (iv) the Interest Period (or Interest Periods) to be applicable
        to such Borrowing, which shall be a period contemplated by the
        definition of the term "Interest Period"; and

               (v) the location and number of the Borrower's account to which
        funds are to be disbursed, which shall comply with the requirements of
        Section 2.02.

            (b) Following receipt of an Auction Bid Request in accordance with
this Section, the Agent shall notify the Banks of the details thereof by
telecopy, inviting the Banks to submit Auction Bids in the case of a Eurodollar
Auction Bid Request, no later than 2:00 p.m., New York City time, four Business
Days before the proposed date of the Borrowing, in the case of a Fixed Rate
Auction Bid Request, no later than 2:00 p.m., one Business Day before the
proposed date of the Borrowing, and, in the case of a Delayed Fixed Rate Bid
Request, not later than 3:00 p.m., New York City time, two Business Days before
the proposed date of the Borrowing.

            (c) Each Bank may (but shall not have any obligation to) make one or
more Auction Bids to the Borrower in response to an Auction Bid Request. Each
Auction Bid by a Bank must be in a form approved by the Agent and must be
received by the Agent by telecopy, in the case of a Eurodollar Auction
Borrowing, not later than 12:00 (noon), New York City time, three Business Days
before the proposed date of such Auction Borrowing, in the case of a Fixed Rate
Borrowing, not later than 10:30 a.m., New York City time, on the proposed date
of such Auction Borrowing, and, in the case of a Delayed Fixed Rate Bid, not
later than 12:00 (noon), New York City time, one Business Day before the
proposed date of such Auction Borrowing. Auction Bids that do not conform
substantially to the form approved by the Agent may be rejected by the Agent,
and the Agent shall notify the applicable Bank as promptly as practicable. Each
Auction Bid shall specify (i) the principal amount (which shall be an integral
multiple of $1,000,000 and which may equal the entire principal amount of the
Auction Borrowing requested by the Borrower) of the Auction Loan or Loans that
the Bank is willing to make, (ii) the Auction Bid Rate or Rates at which the
Bank is prepared to make such Loan or Loans (expressed as a percentage rate per
annum in the form of a decimal to no more than four decimal places) and (iii)
the Interest Period applicable to each such Loan and the last day thereof in
accordance with the Auction Bid Request.
<PAGE>   30
                                                                              25

            (d) The Agent shall promptly notify the Borrower by telecopy of the
Auction Bid Rate and the principal amount specified in each Auction Bid and the
identity of the Bank that shall have made such Auction Bid.

            (e) Subject only to the provisions of this paragraph, the Borrower
may accept or reject any Auction Bid. The Borrower shall notify the Agent by
telephone, confirmed by telecopy in a form approved by the Agent, whether and to
what extent it has decided to accept or reject each Auction Bid, in the case of
a Eurodollar Auction Borrowing, not later than 2:00 p.m., New York City time,
three Business Days before the date of the proposed Auction Borrowing, in the
case of a Fixed Rate Borrowing, not later than 11:30 a.m., New York City time,
on the proposed date of the Auction Borrowing, and, in the case of a Delayed
Fixed Rate Borrowing, not later than 1:00 p.m., New York City time, one Business
day before the date of the proposed Auction Borrowing; provided that (i) the
failure of the Borrower to give such notice shall be deemed to be a rejection of
each Auction Bid, (ii) the Borrower shall not accept an Auction Bid made at a
particular Auction Bid Rate if the Borrower rejects an Auction Bid made at a
lower Auction Bid Rate, (iii) the aggregate amount of the Auction Bids accepted
by the Borrower shall not exceed the aggregate amount of the requested Auction
Borrowing specified in the related Auction Bid Request, (iv) to the extent
necessary to comply with clause (iii) above, the Borrower may accept Auction
Bids at the same Auction Bid Rate in part, which acceptance, in the case of
multiple Auction Bids at such Auction Bid Rate, shall be made pro rata in
accordance with the amount of each such Auction Bid, and (v) except pursuant to
clause (iv) above, no Auction Bid shall be accepted for an Auction Loan unless
such Auction Loan is in an integral multiple of $1,000,000. A notice given by
the Borrower pursuant to this paragraph shall be irrevocable.

            (f) The Agent shall notify each bidding Bank by telephone and
telecopy whether or not its Auction Bid has been accepted (and, if so, the
amount and Auction Bid Rate so accepted) in the case of Eurodollar Auction
Loans, by 3:00 p.m., New York City time, three Business Days before the
borrowing date, in the case of Fixed Rate Loans, by 12:00 (noon), New York City
time, on the borrowing date, and, in the case of Delayed Fixed Rate Loans, by
3:00 p.m., New York City time, one Business Day before the Borrowing Date. Each
successful bidder will thereupon become bound, subject to the terms and
conditions hereof, to make the Auction Loan in respect of which its Auction Bid
has been accepted.

            (g) If the Agent shall elect to submit an Auction Bid in its
capacity as a Bank, it shall submit such Auction Bid directly to the Borrower at
least one quarter of an
<PAGE>   31
                                                                              26

hour earlier than the time by which the other Banks are required to submit their
Auction Bids to the Agent pursuant to paragraph (b) of this Section.

            SECTION 2.05. Repayment of Loans; Evidence of Debt. (a) The Borrower
hereby unconditionally promises to pay each Bank the then unpaid principal
amount of each Loan of such Bank on the last day of the Interest Period
applicable to such Loan and on the Expiration Date. Each Loan shall bear
interest on the outstanding principal balance thereof as set forth in Section
2.08.

            (b) Each Bank shall maintain in accordance with its usual practice
an account or accounts evidencing the indebtedness of the Borrower to such Bank
resulting from each Loan made by such Bank, including the amounts of principal
and interest payable and paid to such Bank from time to time hereunder.

            (c) The Agent shall maintain accounts in which it shall record (i)
the amount and date of each Loan made hereunder, the Class and Type thereof and
the Interest Period applicable thereto, (ii) the amount of any principal,
interest or fees due and payable or to become due and payable from the Borrower
to each Bank hereunder and (iii) the amount of any principal, interest or fees
received by the Agent hereunder for the account of the Banks and each Bank's
share thereof.

            (d) The entries made in the accounts maintained pursuant to
paragraph (b) or (c) of this Section shall be prima facie evidence of the
existence and amounts of the obligations recorded therein; provided that the
failure of any Bank or the Agent to maintain such accounts or any error therein
shall not in any manner affect the obligation of the Borrower to repay the Loans
in accordance with the terms of this Agreement.

            (e) Any Bank may request that Loans of any Class made by it be
evidenced by a Note. In such event, the Borrower shall prepare, execute and
deliver to such Bank a Note payable to the order of such Bank (or, if requested
by such Bank, to such Bank and its registered assigns). Thereafter, the Loans
evidenced by such Note and interest thereon shall at all times (including after
assignment pursuant to Section 9.04) be represented by one or more Notes in such
form payable to the order of the payee named therein (or, if such Note is a
registered Note, to such payee and its registered assigns).

            SECTION 2.06. Letters of Credit. (a) General. Subject to the terms
and conditions set forth herein, the Borrower may request the issuance of
Letters of Credit for its own account, in a form reasonably acceptable to the
Agent and the Issuing Bank, at any time and from time to time during the
Availability Period. In the event of any
<PAGE>   32
                                                                              27

inconsistency between the terms and conditions of this Agreement and the terms
and conditions of any form of letter of credit application or other agreement
submitted by the Borrower to, or entered into by the Borrower with, the Issuing
Bank relating to any Letter of Credit, the terms and conditions of this
Agreement shall control.

            (b) Notice of Issuance, Amendment, Renewal, Extension; Certain
Conditions. To request the issuance of a Letter of Credit (or the amendment,
renewal or extension of an outstanding Letter of Credit), the Borrower shall
hand deliver or telecopy (or transmit by electronic communication, if
arrangements for doing so have been approved by the Issuing Bank) to the Issuing
Bank and the Agent (reasonably in advance of the requested date of issuance,
amendment, renewal or extension) a notice requesting the issuance of a Letter of
Credit, or identifying the Letter of Credit to be amended, renewed or extended,
and specifying the date of issuance, amendment, renewal or extension (which
shall be a Business Day), the date on which such Letter of Credit is to expire
(which shall comply with paragraph (c) of this Section), the amount of such
Letter of Credit, the name and address of the beneficiary thereof and such other
information as shall be necessary to prepare, amend, renew or extend such Letter
of Credit. If requested by the Issuing Bank, the Borrower also shall submit a
letter of credit application on the Issuing Bank's standard form in connection
with any request for a Letter of Credit. A Letter of Credit shall be issued,
amended, renewed or extended only if (and upon issuance, amendment, renewal or
extension of each Letter of Credit the Borrower shall be deemed to represent and
warrant that), after giving effect to such issuance, amendment, renewal or
extension (i) the LC Exposure shall not exceed $50,000,000 and (ii) the sum of
the total Revolving Credit Exposures plus the aggregate principal amount of
outstanding Auction Loans shall not exceed the total Commitments.

            (c) Expiration Date. Each Letter of Credit shall expire not later
than the close of business on the date that is five Business Days prior to the
Expiration Date.

            (d) Participations. By the issuance of a Letter of Credit (or an
amendment to a Letter of Credit increasing the amount thereof) and without any
further action on the part of the Issuing Bank or the Banks, the Issuing Bank
hereby grants to each Bank, and each Bank hereby acquires from the Issuing Bank,
a participation in such Letter of Credit equal to such Bank's Applicable
Percentage of the aggregate amount available to be drawn under such Letter of
Credit. In consideration and in furtherance of the foregoing, each Bank hereby
absolutely and unconditionally agrees to pay to the Agent, for the account of
the Issuing Bank, such Bank's Applicable Percentage of each LC Disbursement made
by the Issuing Bank and not reimbursed by the Borrower on the date due as
provided in paragraph (e) of this Section, or of any reimbursement payment
<PAGE>   33
                                                                              28

required to be refunded to the Borrower for any reason to the extent received by
such Bank. Each Bank acknowledges and agrees that its obligation to acquire
participations pursuant to this paragraph in respect of Letters of Credit is
absolute and unconditional and shall not be affected by any circumstance
whatsoever, including any amendment, renewal or extension of any Letter of
Credit or the occurrence and continuance of a Default or reduction or
termination of the Commitments, and that each such payment shall be made without
any offset, abatement, withholding or reduction whatsoever.

            (e) Reimbursement. If the Issuing Bank shall make any LC
Disbursement in respect of a Letter of Credit, the Borrower shall reimburse such
LC Disbursement by paying to the Agent an amount equal to such LC Disbursement
not later than 12:00 (noon), New York City time, on (i) the Business Day that
the Borrower receives notice of such LC Disbursement, if such notice is received
prior to 10:00 a.m., New York City time, on the day of receipt, or (ii) the
Business Day immediately following the day that the Borrower receives such
notice, if such notice is not received prior to such time on the day of receipt;
provided that ,if such LC Disbursement is not less than $1,000,000, the Borrower
may, subject to the conditions to borrowing set forth herein, request in
accordance with Section 2.03 that such payment be financed with an ABR Revolving
Borrowing in an equivalent amount and, to the extent so financed, the Borrower's
obligation to make such payment shall be discharged and replaced by the
resulting ABR Revolving Borrowing. If the Borrower fails to make such payment
when due, the Agent shall notify each Bank of the applicable LC Disbursement,
the payment then due from the Borrower in respect thereof and such Bank's
Applicable Percentage thereof. Promptly following receipt of such notice, each
Bank shall pay to the Agent its Applicable Percentage of the payment then due
from the Borrower, in the same manner as provided in Section 2.02 with respect
to Loans made by such Bank (and Section 2.02 shall apply, mutatis mutandis, to
the payment obligations of the Banks), and the Agent shall promptly pay to the
Issuing Bank the amounts so received by it from the Banks. Promptly following
receipt by the Agent of any payment from the Borrower pursuant to this
paragraph, the Agent shall distribute such payment to the Issuing Bank or, to
the extent that Banks have made payments pursuant to this paragraph to reimburse
the Issuing Bank, then to such Banks and the Issuing Bank as their interests may
appear. Any payment made by a Bank pursuant to this paragraph to reimburse the
Issuing Bank for any LC Disbursement (other than the funding of ABR Revolving
Loans as contemplated above) shall not constitute a Loan and shall not relieve
the Borrower of its obligation to reimburse such LC Disbursement.

            (f) Obligations Absolute. The Borrower's obligation to reimburse LC
Disbursements as provided in paragraph (e) of this Section shall be absolute,
<PAGE>   34
                                                                              29

unconditional and irrevocable, and shall be performed strictly in accordance
with the terms of this Agreement under any and all circumstances whatsoever and
irrespective of (i) any lack of validity or enforceability of any Letter of
Credit or this Agreement, or any term or provision therein, (ii) any draft or
other document presented under a Letter of Credit proving to be forged,
fraudulent or invalid in any respect or any statement therein being untrue or
inaccurate in any respect, (iii) payment by the Issuing Bank under a Letter of
Credit against presentation of a draft or other document that does not comply
with the terms of such Letter of Credit, or (iv) any other event or circumstance
whatsoever, whether or not similar to any of the foregoing, that might, but for
the provisions of this Section, constitute a legal or equitable discharge of, or
provide a right of setoff against, the Borrower's obligations hereunder. Neither
the Agent, the Banks nor the Issuing Bank, nor any of their Related Parties,
shall have any liability or responsibility by reason of or in connection with
the issuance or transfer of any Letter of Credit or any payment or failure to
make any payment thereunder (irrespective of any of the circumstances referred
to in the preceding sentence), or any error, omission, interruption, loss or
delay in transmission or delivery of any draft, notice or other communication
under or relating to any Letter of Credit (including any document required to
make a drawing thereunder), any error in interpretation of technical terms or
any consequence arising from causes beyond the control of the Issuing Bank;
provided that the foregoing shall not be construed to excuse the Issuing Bank
from liability to the Borrower to the extent of any direct damages (as opposed
to consequential damages, claims in respect of which are hereby waived by the
Borrower to the extent permitted by applicable law) suffered by the Borrower
that are caused by the Issuing Bank's gross negligence or wilful misconduct. The
parties hereto expressly agree that, in the absence of gross negligence or
wilful misconduct on the part of the Issuing Bank (as finally determined by a
court of competent jurisdiction), the Issuing Bank shall be deemed to have
exercised care in each such determination. In furtherance of the foregoing and
without limiting the generality thereof, the parties agree that, with respect to
documents presented which appear on their face to be in substantial compliance
with the terms of a Letter of Credit, the Issuing Bank may, in its sole
discretion, either accept and make payment upon such documents without
responsibility for further investigation, regardless of any notice or
information to the contrary, or refuse to accept and make payment upon such
documents if such documents are not in strict compliance with the terms of such
Letter of Credit.

            (g) Disbursement Procedures. The Issuing Bank shall, promptly
following its receipt thereof, examine all documents purporting to represent a
demand for payment under a Letter of Credit. The Issuing Bank shall promptly
notify the Agent and the Borrower by telephone (confirmed by telecopy) of such
demand for payment and whether the Issuing Bank has made or will make an LC
Disbursement thereunder;
<PAGE>   35
                                                                              30

provided that any failure to give or delay in giving such notice shall not
relieve the Borrower of its obligation to reimburse the Issuing Bank and the
Banks with respect to any such LC Disbursement.

            (h) Interim Interest. If the Issuing Bank shall make any LC
Disbursement, then, unless the Borrower shall reimburse such LC Disbursement in
full on the date such LC Disbursement is made, the unpaid amount thereof shall
bear interest, for each day from and including the date such LC Disbursement is
made to but excluding the date that the Borrower reimburses such LC
Disbursement, at the rate per annum then applicable to ABR Revolving Loans;
provided that, if the Borrower fails to reimburse such LC Disbursement when due
pursuant to paragraph (e) of this Section, then Section 2.09 shall apply.
Interest accrued pursuant to this paragraph shall be for the account of the
Issuing Bank, except that interest accrued on and after the date of payment by
any Bank pursuant to paragraph (e) of this Section to reimburse the Issuing Bank
shall be for the account of such Bank to the extent of such payment.

            (i) Cash Collateralization. If any Event of Default shall occur and
be continuing, on the Business Day that the Borrower receives notice from the
Agent, at the request of the Required Banks, demanding the deposit of cash
collateral pursuant to this paragraph, the Borrower shall deposit in an account
with the Agent, in the name of the Agent and for the benefit of the Banks, an
amount in cash equal to the LC Exposure as of such date plus any accrued and
unpaid interest thereon; provided that the obligation to deposit such cash
collateral shall become effective immediately, and such deposit shall become
immediately due and payable, without demand or other notice of any kind, upon
the occurrence of any Event of Default with respect to the Borrower described in
clause (g) or (h) of Article VII. Such deposit shall be held by the Agent as
collateral for the payment and performance of the obligations of the Borrower
under this Agreement. The Agent shall have exclusive dominion and control,
including the exclusive right of withdrawal, over such account. Other than any
interest earned on the investment of such deposits, which investments shall be
made at the option and sole discretion of the Agent and at the Borrower's risk
and expense, such deposits shall not bear interest. Interest or profits, if any,
on such investments shall accumulate in such account. Moneys in such account
shall be applied by the Agent to reimburse the Issuing Bank for LC Disbursements
for which it has not been reimbursed and, to the extent not so applied, shall be
held for the satisfaction of the reimbursement obligations of the Borrower for
the LC Exposure at such time or be applied to satisfy other obligations of the
Borrower under this Agreement. If the Borrower is required to provide an amount
of cash collateral hereunder as a result of the occurrence of an Event of
Default, such amount (to the extent
<PAGE>   36
                                                                              31

not applied as aforesaid) shall be returned to the Borrower within three
Business Days after all Events of Default have been cured or waived.

            SECTION 2.07. Fees. (a) The Borrower agrees to pay to each Bank,
through the Agent, on the first Business Day of January, April, July and
October, in each year, and on the date on which the Commitment of such Bank
shall be terminated as provided herein, a commitment fee at the Applicable Rate
(a "Commitment Fee") on the average daily unused amount of the Commitment of
such Bank during the preceding quarter (or shorter period commencing with the
date hereof or ending with the Expiration Date or the date on which the
Commitment of such Bank shall be terminated); provided, that, for purposes of
determining the Commitment Fee, the undrawn portion of the Commitments shall not
be deemed to be reduced by the amount of any borrowing under the Auction
Facility. The Commitment Fees shall accrue on each day at a rate per annum equal
to the Applicable Rate in effect on such day. All Commitment Fees shall be
computed on the basis of the actual number of days elapsed in a year of 365 or
366 days, as appropriate. The Commitment Fee due to each Bank shall commence to
accrue on the date of this Agreement and shall cease to accrue on the date on
which the Commitment of such Bank shall be terminated as provided herein.

            (b) The Borrower agrees to pay (i) to the Agent for the account of
each Bank a participation fee with respect to its participations in Letters of
Credit, which shall accrue at the Applicable Rate on the average daily amount of
such Bank's LC Exposure (excluding any portion thereof attributable to
unreimbursed LC Disbursements) during the period from and including the Closing
Date to but excluding the later of the date on which such Bank's Commitment
terminates and the date on which such Bank ceases to have any LC Exposure, and
(ii) to the Issuing Bank a fronting fee for Letters of Credit, which shall
accrue at the rate per annum of .125% on the average daily amount of the LC
Exposure (excluding any portion thereof attributable to unreimbursed LC
Disbursements) during the period from and including the Closing Date to but
excluding the later of the date of termination of the Commitments and the date
on which there ceases to be any LC Exposure. Participation fees and fronting
fees accrued through and including the last day of March, June, September and
December of each year shall be payable on the first Business Day following such
last day, commencing on the first such date to occur after the Closing Date;
provided that all such fees shall be payable on the date on which the
Commitments terminate and any such fees accruing after the date on which the
Commitments terminate shall be payable on demand. Any other fees payable to the
Issuing Bank pursuant to this paragraph shall be payable within 10 days after
demand. All participation fees and fronting fees shall be computed on the basis
of a year of 365 or
<PAGE>   37
                                                                              32

366 days, as appropriate and shall be payable for the actual number of days
elapsed (including the first day but excluding the last day).

            (c) The Borrower agrees to pay to the Agent, for its own account,
the fees separately agreed between the Agent and the Borrower.

            (d) The Borrower agrees to pay the Agent, for its own account,
$1,000 for each Auction Bid Request the Borrower makes, payable the day on which
the Auction Bid Request is made.

            (e) For any day on which the outstanding principal amount of Loans
and the LC Exposure shall be greater than 33% of the total Commitments, the
Borrower shall pay to the Administrative Agent for the account of each Bank a
utilization fee (a "Utilization Fee") on the aggregate amount on such day of
such Bank's outstanding Loans and such Bank's Applicable Percentage of the LC
Exposure at a rate per annum equal to the Applicable Rate in effect for such day
based on the percentage of the outstanding total Commitments represented on such
day by the aggregate outstanding principal amount of Loans and the total LC
Exposures. The Utilization Fees, if any, in respect of any fiscal quarter shall
be payable in arrears on the first Business Day following each March 31, June
30, September 30 and December 31, on the date on which the Commitments terminate
and on any later date on which the Loans are repaid in full or on which the LC
Exposure is terminated; provided, however, that if the Utilization Fee should be
payable on a day other than a Business Day, such date of payment shall be
extended to the next succeeding Business Day. All Utilization Fees shall be
computed on the basis of a year of 365 or 366 days, as appropriate, and shall be
payable for the actual number of days elapsed (including the first day but
excluding the last day).

            (f) All Fees shall be paid on the dates due, in immediately
available funds, to the Agent (or to the Issuing Bank, in the case of fees
payable to it) for distribution, if and as appropriate, among the Banks. Once
paid, none of the Fees shall be refundable under any circumstances.

            SECTION 2.08. Interest on Loans. (a) Subject to the provisions of
Section 2.09, the Loans comprising each ABR Borrowing shall bear interest
(computed on the basis of the actual number of days elapsed over a year of 365
or 366 days, as the case may be) at a rate per annum equal to the Alternate Base
Rate plus the Applicable Rate.
<PAGE>   38
                                                                              33

            (b) Subject to the provisions of Section 2.09, the Loans comprising
each Eurodollar Borrowing shall bear interest (computed on the basis of the
actual number of days elapsed over a year of 360 days) (i) in the case of a
Eurodollar Revolving Loan at a rate per annum equal to the Eurodollar Rate for
the Interest Period in effect for such Borrowing plus the Applicable Rate or
(ii) in the case of a Eurodollar Auction Loan, at the Eurodollar Rate for the
Interest Period in effect for such Borrowing plus the Margin applicable to such
Loan.

            (c) Each Fixed Rate Loan shall bear interest at the Fixed Rate
applicable to such Loan. Each Delayed Fixed Rate Loan shall bear interest at the
Delayed Fixed Rate applicable to such Loan.

            (d) Interest on each Loan shall be payable on the Interest Payment
Dates applicable to such Loan except as otherwise provided in this Agreement.
The applicable Alternate Base Rate or Eurodollar Rate for each Interest Period
or day within an Interest Period, as the case may be, shall be determined by the
Agent, and such determination shall be conclusive absent manifest error.

            SECTION 2.09. Default Interest. If the Borrower shall default in the
payment of the principal of or interest on any Loan or any other amount becoming
due hereunder, by acceleration or otherwise, the Borrower shall on demand from
time to time pay interest, to the extent permitted by law, on such defaulted
amount up to (but not including) the date of actual payment (after as well as
before judgment) at a rate per annum (computed on the basis of the actual number
of days elapsed over a year of 360 days) equal to the Alternate Base Rate plus
the Applicable Rate plus 2%.

            SECTION 2.10. Alternate Rate of Interest. In the event, and on each
occasion, that on the day two Business Days prior to the commencement of any
Interest Period for a Eurodollar Borrowing the Agent shall have in good faith
determined that dollar deposits in the principal amounts of the Loans comprising
such Borrowing are not generally available in the London interbank market, or
that the rates at which such dollar deposits are being offered will not
adequately and fairly reflect the cost to the majority in interest of the Banks
of making or maintaining their Eurodollar Loans during such Interest Period, or
that reasonable means do not exist for ascertaining the Eurodollar Rate, the
Agent shall, as soon as practicable thereafter, give written or telecopy notice
of such determination to the Borrower and the Banks. In the event of any such
determination, (i) any request by the Borrower for a Eurodollar Borrowing
pursuant to Section 2.03 shall, until the Agent shall have advised the Borrower
and the Banks that the circumstances giving rise to such notice no longer exist,
be deemed to be a request for an
<PAGE>   39
                                                                              34

ABR Borrowing and (ii) any request by the Borrower for a Eurodollar Auction
Borrowing shall be ineffective; provided that (A) if the circumstances giving
rise to such notice do not affect all the Banks, then requests by Borrower for
Eurodollar Auction Borrowings may be made to Banks that are not affected thereby
and (B) if the circumstances giving rise to such notice affect only one Type of
Borrowings, then the other Type of Borrowings shall be permitted. Each
determination by the Agent hereunder shall be conclusive absent manifest error.

            SECTION 2.11. Termination, Reduction and Extension of Commitments.
(a) The Commitments shall be automatically terminated on the Expiration Date.

            (b) Upon at least three Business Days' prior irrevocable written or
telecopy notice to the Agent, the Borrower may at any time in whole permanently
terminate, or from time to time in part permanently reduce, the unused portion
of the Commitments; provided, however, that (i) each partial reduction of the
Commitments shall be in an integral multiple of $1,000,000 and (ii) the Borrower
shall not terminate or reduce the Commitments if, after giving effect to any
concurrent prepayment of the Loans in accordance with Section 2.12, the sum of
the Revolving Credit Exposures plus the aggregate principal amount of
outstanding Auction Loans would exceed the total Commitments.

            (c) Each reduction in the Commitments hereunder shall be made
ratably among the Banks in accordance with their respective applicable
Commitments. The Borrower shall pay to the Agent for the account of the Banks,
on the date of each termination or reduction, the Commitment Fees on the amount
of the Commitments so terminated or reduced accrued through the date of such
termination or reduction.

            (d) The Borrower may request an extension of this Agreement upon 60
days' prior written notice to the Agent; provided, that, such extension will be
at the sole option of the Banks and will require the written agreement of each
Bank in order to become effective.

            SECTION 2.12. Prepayment. (a) The Borrower shall have the right at
any time and from time to time to prepay any Borrowing, in whole or in part,
upon at least three Business Days' prior written or telecopy notice (or
telephone notice promptly confirmed by written or telecopy notice) to the Agent;
provided, however, that each partial prepayment shall be in an amount which is
an integral multiple of $1,000,000, and that the Borrower shall not have the
right to prepay any Auction Loan without the prior consent of the Bank thereof.
<PAGE>   40
                                                                              35

            (b) On the date of any termination or reduction of the Commitments
pursuant to Section 2.11, the Borrower shall pay or prepay so much of the
Borrowings as shall be necessary in order that the aggregate principal amount of
the Revolving Credit Exposures plus the aggregate principal amount of Auction
Loans outstanding will not exceed the aggregate Commitments after giving effect
to such termination or reduction.

            (c) Each notice of prepayment shall specify the prepayment date and
the principal amount of each Borrowing (or portion thereof) to be prepaid, shall
be irrevocable and shall commit the Borrower to prepay such Borrowing by the
amount stated therein on the date stated therein. All prepayments under this
Section 2.12 shall be subject to Section 2.15 but otherwise without premium or
penalty. All prepayments under this Section 2.12 shall be accompanied by accrued
interest on the principal amount being prepaid to the date of payment.

            SECTION 2.13. Reserve Requirements; Change in Circumstances. (a)
Notwithstanding any other provision herein, if after the date of this Agreement
there is adopted any new law, rule or regulation or any change in applicable law
or regulation or in the interpretation or administration thereof by any
governmental authority charged with the interpretation or administration thereof
(whether or not having the force of law) which shall impose, modify or deem
applicable any reserve, special deposit or similar requirement against assets
of, deposits with or for the account of or credit extended by such Bank (except
any such reserve requirement which is reflected in the Eurodollar Rate) or shall
impose on such Bank or the London interbank market any other condition affecting
this Agreement or Eurodollar Loans made by such Bank, and the result of any of
the foregoing shall be to increase the cost to such Bank of making or
maintaining any Eurodollar Loan or to reduce the amount of any sum received or
receivable by such Bank hereunder or under any Notes (whether of principal,
interest or otherwise) in respect of Eurodollar Loans by an amount deemed by
such Bank to be material, then the Borrower will pay to such Bank upon demand
such additional amount or amounts as will compensate such Bank for such
additional costs incurred or reduction suffered. It is acknowledged that this
Agreement is being entered into by the Banks on the understanding that the Banks
will not be required to maintain capital against their Commitments under
currently applicable laws, regulations and regulatory guidelines. In the event
Banks shall be advised by any Governmental Authority or shall otherwise
determine on the basis of pronouncements of any Governmental Authority that such
understanding is incorrect, it is agreed that the Banks will be entitled to make
claims under this paragraph based upon market requirements prevailing on the
date hereof for commitments under comparable credit facilities against which
capital is required to be maintained.
<PAGE>   41
                                                                              36

            (b) If any Bank shall have determined that the applicability of any
law, rule, regulation, agreement or guideline adopted after the date hereof
regarding capital adequacy, or any change in any of the foregoing or the
adoption after the date hereof of any change in any law, rule, regulation,
agreement or guideline existing on the date hereof or in the interpretation or
administration of any of the foregoing by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or compliance by any Bank (or any lending office of such Bank) or any
Bank's holding company with any request or directive regarding capital adequacy
(whether or not having the force of law) of any such authority, central bank or
comparable agency, has or would have the effect of reducing the rate of return
on such Bank's capital or on the capital of such Bank's holding company, if any,
as a consequence of this Agreement or the Loans made by such Bank pursuant
hereto to a level below that which such Bank or such Bank's holding company
could have achieved but for such applicability, adoption, change or compliance
(taking into consideration such Bank's policies and the policies of such Bank's
holding company with respect to capital adequacy) by an amount deemed by such
Bank to be material, then from time to time the Borrower shall pay to such Bank
such additional amount or amounts as will compensate such Bank or such Bank's
holding company for any such reduction suffered.

            (c) A certificate of each Bank setting forth in reasonable detail
such amount or amounts as shall be necessary to compensate such Bank or its
holding company as specified in paragraph (a) or (b) above, as the case may be,
and the manner in which such Bank has determined the same, shall be delivered to
the Borrower and shall be conclusive absent manifest error. The Borrower shall
pay each Bank the amount shown as due on any such certificate delivered by it
within 10 days after its receipt of the same.

            (d) Failure on the part of any Bank to demand compensation for any
increased costs or reduction in amounts received or receivable or reduction in
return on capital with respect to any period shall not constitute a waiver of
such Bank's right to demand compensation with respect to such period or any
other period. The protection of this Section shall be available to each Bank
regardless of any possible contention of the invalidity or inapplicability of
the law, rule, regulation, guideline or other change or condition which shall
have occurred or been imposed.

            SECTION 2.14. Change in Legality. (a) Notwithstanding any other
provision herein, if any change in, or adoption of, any law or regulation or in
the interpretation thereof by any governmental authority charged with the
administration or interpretation thereof shall make it unlawful for any Bank to
make or maintain any
<PAGE>   42
                                                                              37

Eurodollar Loan or to give effect to its obligations as contemplated hereby with
respect to any Eurodollar Loan, then, by written notice to the Borrower and to
the Agent, such Bank may:

               (i) declare that Eurodollar Loans will not thereafter be made by
        such Bank hereunder, whereupon any request by the Borrower for a
        Eurodollar Borrowing shall, as to such Bank only, be deemed a request
        for an ABR Loan unless such declaration shall be subsequently withdrawn;
        and

               (ii) require that all outstanding Eurodollar Loans made by it be
        converted to ABR Loans, in which event all such Eurodollar Loans shall
        be automatically converted to ABR Loans as of the effective date of such
        notice as provided in paragraph (b) below.

In the event any Bank shall exercise its rights under (i) or (ii) above, all
payments and prepayments of principal which would otherwise have been applied to
repay the Eurodollar Loans that would have been made by such Bank or the
converted Eurodollar Loans of such Bank shall instead be applied to repay the
ABR Loans made by such Bank in lieu of, or resulting from the conversion of,
such Eurodollar Loans.

            (b) For purposes of this Section 2.14, a notice to the Borrower by
any Bank shall be effective as to each Eurodollar Loan, if lawful, on the last
day of the Interest Period currently applicable to such Eurodollar Loan.

            SECTION 2.15. Indemnity. The Borrower shall indemnify each Bank
against any loss or expense which such Bank may sustain or incur as a
consequence of (a) any failure by the Borrower to fulfill on the date of any
Eurodollar Borrowing hereunder the applicable conditions set forth in Article
IV, (b) any failure by the Borrower to borrow or to refinance any Eurodollar
Loan hereunder after irrevocable notice of such borrowing or refinancing has
been given pursuant to Sections 2.03 and 2.04, (c) any payment or prepayment of
a Eurodollar Loan required by any other provision of this Agreement or otherwise
made or deemed made on a date other than the last day of the Interest Period
applicable thereto or (d) any default in payment or prepayment of the principal
amount of any Eurodollar Loan or any part thereof or interest accrued thereon,
as and when due and payable (at the due date thereof, whether by scheduled
maturity, acceleration, irrevocable notice of prepayment or otherwise)
including, in each such case, any loss or reasonable expense sustained or
incurred or to be sustained or incurred in liquidating or employing deposits
from third parties acquired to effect or maintain such Loan or any part thereof
as a Eurodollar Loan. Such loss or
<PAGE>   43
                                                                              38

reasonable expense shall include an amount equal to the excess, if any, as
reasonably determined by such Bank, of (i) its cost of obtaining the funds for
the Eurodollar Loan being paid, prepaid, converted or not borrowed (assumed to
be the Eurodollar Rate applicable thereto) for the period from the date of such
payment, prepayment, conversion or failure to borrow to the last day of the
Interest Period for such Loan (or, in the case of a failure to borrow, the
Interest Period for such Eurodollar Loan which would have commenced on the date
of such failure) over (ii) the amount of interest (as reasonably determined by
such Bank) that would be realized by such Bank in reemploying the funds so paid,
prepaid or not borrowed for such period or Interest Period, as the case may be.
A certificate of any Bank setting forth any amount or amounts which such Bank is
entitled to receive pursuant to this Section, and the manner in which such Bank
has determined the same, shall be delivered to the Borrower and shall be
conclusive absent manifest error.

            SECTION 2.16. Pro Rata Treatment. Except as required under Sections
2.04 and 2.14, each Borrowing, each payment or prepayment of principal of any
Borrowing, each payment of interest on the Loans, each payment of the Commitment
Fees, each reduction of the Commitments and each refinancing of any Borrowing
with a Borrowing of any Type shall be allocated pro rata among the Banks in
accordance with their respective applicable Commitments (or, if such Commitments
shall have expired or been terminated, in accordance with the respective
principal amounts of their outstanding Loans). Each Bank agrees that in
computing such Bank's portion of any Borrowing to be made hereunder, the Agent
may, in its discretion, round each Bank's percentage of such Borrowing, computed
in accordance with Section 2.01, to the next higher or lower whole dollar
amount.

            SECTION 2.17. Sharing of Setoffs. Each Bank agrees that if it shall,
through the exercise of a right of banker's lien, setoff or counterclaim against
the Borrower, or pursuant to a secured claim under Section 506 of Title 11 of
the United States Code or other security or interest arising from, or in lieu
of, such secured claim, received by such Bank under any applicable bankruptcy,
insolvency or other similar law or otherwise, or by any other means, obtain
payment (voluntary or involuntary) in respect of any Revolving Loan or Revolving
Loans or participations in LC Disbursements as a result of which the unpaid
principal portion of its Revolving Loans or participations in LC Disbursements
shall be proportionately less than the unpaid principal portion of the Revolving
Loans or participations in LC Disbursements of any other Bank, it shall be
deemed simultaneously to have purchased from such other Bank at face value, and
shall promptly pay to such other Bank the purchase price for, a participation in
the Revolving Loans or participations in LC Disbursements of such other Bank, so
that the aggregate
<PAGE>   44
                                                                              39

unpaid principal amount of the Revolving Loans and participations in Revolving
Loans and in LC Disbursements held by each Bank shall be in the same proportion
to the aggregate unpaid principal amount of all Revolving Loans and
participations in LC Disbursements then outstanding as the principal amount of
its Revolving Loans and participations in LC Disbursements prior to such
exercise of banker's lien, setoff or counterclaim or other event was to the
principal amount of all Revolving Loans and participations in LC Disbursements
outstanding prior to such exercise of banker's lien, setoff or counter-claim or
other event; provided, however, that, if any such purchase or purchases or
adjustments shall be made pursuant to this Section and the payment giving rise
thereto shall thereafter be recovered, such purchase or purchases or adjustments
shall be rescinded to the extent of such recovery and the purchase price or
prices or adjustment restored without interest. The Borrower expressly consents
to the foregoing arrangements and agrees that any Bank holding a participation
in a Revolving Loan or in an LC Disbursement deemed to have been so purchased
may exercise any and all rights of banker's lien, setoff or counterclaim with
respect to any and all moneys owing by the Borrower to such Bank by reason
thereof as fully as if such Bank had made a Loan directly to the Borrower in the
amount of such participation.

            SECTION 2.18. Payments. (a) The Borrower shall make each payment
(including principal of or interest on any Borrowing or reimbursements of LC
Disbursements or any Fees or other amounts) hereunder and under any other Loan
Document not later than 12:00 (noon), New York City time, on the date when due
in dollars to the Agent at its offices at 909 Fannin, Suite 1700, Houston,
Texas, in immediately available funds.

            (b) Whenever any payment (including principal of or interest on any
Borrowing or reimbursements of LC Disbursements or any Fees or other amounts)
hereunder or under any other Loan Document shall become due, or otherwise would
occur, on a day that is not a Business Day, such payment may be made on the next
succeeding Business Day, and such extension of time shall in such case be
included in the computation of interest or Fees, if applicable.

            SECTION 2.19. Taxes. (a) Any and all payments by the Borrower
hereunder shall be made, in accordance with Section 2.18, free and clear of and
without deduction for any and all present or future taxes, levies, imposts,
deductions, charges or withholdings, and all liabilities with respect thereto,
excluding taxes imposed on the net income of the Agent, any Bank or the Issuing
Bank (or any transferee or assignee thereof, including a participation holder
(any such entity being called a "Transferee")) and franchise taxes imposed on
the Agent, any Bank or the Issuing Bank (or Transferee) by
<PAGE>   45
                                                                              40

the United States or any jurisdiction under the laws of which the Agent, any
such Bank or the Issuing Bank (or such Transferee) or the applicable lending
office, is organized or any political subdivision thereof (all such nonexcluded
taxes, levies, imposts, deductions, charges, withholdings and liabilities being
hereinafter referred to as "Taxes"). If the Borrower shall be required by law to
deduct any Taxes from or in respect of any sum payable hereunder to the Banks or
the Issuing Bank (or any Transferee) or the Agent, (i) the sum payable shall be
increased by the amount necessary so that after making all required deductions
of Taxes (including deductions applicable to additional sums payable under this
Section 2.19) such Bank or the Issuing Bank (or such Transferee) or the Agent
(as the case may be) shall receive an amount equal to the sum it would have
received had no such deductions of Taxes been made, (ii) the Borrower shall make
such deductions and (iii) the Borrower shall pay the full amount deducted to the
relevant taxing authority or other Governmental Authority in accordance with
applicable law; provided, however, that no Transferee of any Bank shall be
entitled to receive any greater payment under this paragraph (a) than such Bank
would have been entitled to receive with respect to the rights assigned,
participated or other wise transferred except to the extent that such greater
payment arises from circumstances not in existence at the time such assignment,
participation or transfer shall have been made.

            (b) In addition, the Borrower agrees to pay any present or future
stamp or documentary taxes or any other excise or property taxes, charges or
similar levies which arise from any payment made hereunder or from the
execution, delivery or registration of, or otherwise with respect to, this
Agreement or any other Loan Document (hereinafter referred to as "Other Taxes").

            (c) The Borrower will indemnify each Bank (or Transferee), the
Issuing Bank (or Transferee) and the Agent for the full amount of any Taxes and
Other Taxes paid by such Bank (or such Transferee), the Issuing Bank (or such
Transferee) or the Agent, as the case may be, and any liability (including
penalties, interest and reasonable expenses) arising therefrom or with respect
thereto, whether or not such Taxes or Other Taxes were correctly or legally
asserted by the relevant taxing authority or other Governmental Authority. Such
indemnification shall be made within 30 days after the date any Bank or the
Issuing Bank (or Transferee) or the Agent, as the case may be, makes written
demand therefor. If a Bank or the Issuing Bank (or Transferee) or the Agent
shall become aware that it is entitled to receive a refund in respect of Taxes
or Other Taxes as to which it has been indemnified by the Borrower pursuant to
this Section 2.19, it shall promptly notify the Borrower of the availability of
such refund and shall, within 30 days after receipt of a request by the
Borrower, apply for such refund at the Borrower's expense. If any Bank or the
Issuing Bank (or Transferee) or the Agent
<PAGE>   46
                                                                              41

receives a refund in respect of any Taxes or Other Taxes as to which it has been
indemnified by the Borrower pursuant to this Section 2.19, it shall promptly
notify the Borrower of such refund and shall repay such refund to the Borrower
(to the extent of amounts that have been paid by the Borrower under this Section
2.19 with respect to such refund) within 30 days (or promptly upon receipt, if
the Borrower has requested application for such refund pursuant hereto), net of
all reasonable out-of-pocket expenses of such Bank and without interest (other
than interest included in such refund); provided that the Borrower, upon the
request of such Bank or the Issuing Bank (or such Transferee) or the Agent,
agrees to return such refund (plus penalties, interest or other charges) to such
Bank or the Issuing Bank (or such Transferee) or the Agent in the event such
Bank or the Issuing Bank (or such Transferee) or the Agent is required to repay
such refund. Nothing contained in this paragraph (c) shall require any Bank or
the Issuing Bank (or Transferee) or the Agent to make available any of its tax
returns (or any other information relating to its taxes which it deems to be
confidential); provided that Borrower, at its expense, shall have the right to
receive an opinion from a firm of independent public accountants of recognized
national standing acceptable to the Borrower that the amount due hereunder is
correctly calculated.

            (d) Within 30 days after the date of any payment of Taxes or Other
Taxes withheld by the Borrower in respect of any payment to any Bank or the
Issuing Bank (or Transferee) or the Agent, the Borrower will furnish to the
Agent, at its address referred to in Section 9.01, the original or a certified
copy of a receipt received by the Borrower evidencing payment thereof.

            (e) Without prejudice to the survival of any other agreement
contained herein, the agreements and obligations contained in this Section 2.19
shall survive the payment in full of the principal of and interest on all Loans
made hereunder.

            (f) On or prior to the execution of this Agreement and on or before
the transfer to a Transferee, the Agent shall notify the Borrower of each Bank's
or the Issuing Bank's (or Transferee's) address. On or prior to the Banks' or
the Issuing Bank's (or Transferee's) first Interest Payment Date, and from time
to time as required by law, each Bank or the Issuing Bank (or Transferee) that
is not a United States Person within the meaning of Section 770(a)(30) of the
Code (a "Non-U.S. Person") shall, if legally able to do so, deliver to the
Borrower and the Agent (i) one duly completed and executed copy of United States
Internal Revenue Service Form W-8BEN or W-8ECI, (ii) if claiming exemption from
United States Federal withholding tax pursuant to Sections 871(h) or 881(c) of
the Code, one duly completed and executed copy of a United States Internal
Revenue Service Form W-8BEN and a certificate representing that such Non-U.S.
Person
<PAGE>   47
                                                                              42

is not a bank for purposes of Section 881(c) of the Code, is not a 10-percent
shareholder (within the meaning of Section 871(h)(3)(b) of the Code) of the
Borrower and is not a controlled foreign corporation related to the Borrower
(within the meaning of Section 864(d)(4) of the Code) or (iii) any successor
applicable form of any thereof, establishing in each case that such Bank or
Issuing Bank (or Transferee) is entitled to receive payments hereunder payable
to it without deduction or withholding of any United States Federal income
taxes, or subject to a reduced rate thereof. Unless the Borrower and the Agent
have received forms or other documents satisfactory to them indicating that such
payments hereunder or under any Notes are not subject to United States Federal
withholding tax or are subject to such tax at a rate reduced by an applicable
tax treaty, the Borrower shall withhold taxes from such payments at the
applicable statutory rate.

            (g) The Borrower shall not be required to pay any additional amounts
to any Bank or the Issuing Bank (or Transferee) in respect of United States
Federal withholding tax pursuant to paragraph (a) above if the obligation to pay
such additional amounts would not have arisen but for a failure by such Bank or
such Issuing Bank (or Transferee) to comply with the provisions of paragraph (f)
above; provided, however, that the Borrower shall be required to pay those
amounts to any Bank or the Issuing Bank (or Transferee) that it was required to
pay hereunder prior to the failure of such Bank or such Issuing Bank (or
Transferee) to comply with the provisions of such paragraph (f).

            SECTION 2.20. Termination or Assignment of Commitments Under Certain
Circumstances. (a) Any Bank or the Issuing Bank (or Transferee) claiming any
additional amounts payable pursuant to Section 2.13 or Section 2.19 or
exercising its rights under Section 2.14 shall use reasonable efforts
(consistent with legal and regulatory restrictions) to file any certificate or
document requested by the Borrower or to change the jurisdiction of its
applicable lending office if the making of such a filing or change would avoid
the need for or reduce the amount of any such additional amounts which may
thereafter accrue or avoid the circumstances giving rise to such exercise and
would not, in the sole determination of such Bank or such Issuing Bank, be
otherwise disadvantageous to such Bank or such Issuing Bank (or Transferee).

            (b) In the event that any Bank shall have delivered a notice or
certificate pursuant to Section 2.13 or 2.14, or the Borrower shall be required
to make additional payments under Section 2.19 to any Bank or the Issuing Bank
(or Transferee) or to the Agent with respect to any Bank or the Issuing Bank (or
Transferee), the Borrower shall have the right, at its own expense, upon notice
to such Bank or the Issuing Bank (or Transferee) and the Agent (and, if a
Commitment is being assigned, the Issuing Bank), (a) to terminate the Commitment
of such Bank or such Issuing Bank (or Transferee) or
<PAGE>   48
                                                                              43

(b) to require such Bank or the Issuing Bank (or Transferee) to transfer and
assign without recourse (in accordance with and subject to the restrictions
contained in Section 9.04) all its interests, rights and obligations under this
Agreement (other than any outstanding Auction Loans) to another financial
institution which shall assume such obligations; provided that (i) no such
termination or assignment shall conflict with any law, rule or regulation or
order of any Governmental Authority and (ii) the Borrower or the assignee, as
the case may be, shall pay to the affected Bank or the Issuing Bank (or
Transferee) in immediately available funds on the date of such termination or
assignment the principal of and interest accrued to the date of payment on the
Loans made by it hereunder and all other amounts accrued for its account or owed
to it hereunder and, in the case of a termination or assignment by the Issuing
Bank, shall cause all Letters of Credit to be surrendered for cancelation on or
prior to the date of such termination or assignment.

ARTICLE III.  REPRESENTATIONS AND WARRANTIES

            The Borrower represents and warrants to each of the Banks that:

            SECTION 3.01. Organization; Powers. Each of the Borrower and the
Significant Subsidiaries (a) is a corporation duly organized, validly existing
and in good standing under the laws of the jurisdiction of its organization, (b)
has all requisite power and authority to own its property and assets and to
carry on its business as now conducted and as proposed to be conducted, (c) is
qualified to do business in every jurisdiction where such qualification is
required, except where the failure so to qualify would not result in a Material
Adverse Effect, and (d) in the case of the Borrower, has the corporate power and
authority to execute, deliver and perform its obligations under each of the Loan
Documents and each other agreement or instrument contemplated thereby to which
it is or will be a party and to borrow hereunder.

            SECTION 3.02. Authorization. The execution, delivery and performance
by the Borrower of each of the Loan Documents and the borrowings hereunder
(collectively, the "Transactions") (a) have been duly authorized by all
requisite corporate and, if required, stockholder action and (b) will not (i)
violate (A) any provision of law, statute, rule or regulation the violation of
which could reasonably be expected to impair the validity and enforceability of
this Agreement or any other Loan Document or materially impair the rights of or
benefits available to the Banks under the Loan Documents, or of the certificate
or articles of incorporation or other constitutive documents or by-laws of the
Borrower or any Significant Subsidiary, (B) any order of any Governmental
Authority the violation of which could reasonably be expected to impair
<PAGE>   49
                                                                              44

the validity or enforce ability of this Agreement or any other Loan Document, or
materially impair the rights of or benefits available to the Banks under the
Loan Documents, or (C) any provision of any indenture or other material
agreement or instrument evidencing or relating to borrowed money to which the
Borrower or any Significant Subsidiary is a party or by which any of them or any
of their property is or may be bound in a manner which could reasonably be
expected to impair the validity and enforceability of this Agreement or any
other Loan Document or materially impair the rights of or benefits available to
the Banks under the Loan Documents, (ii) be in conflict with, result in a breach
of or constitute (alone or with notice or lapse of time or both) a default under
any such indenture, agreement or other instrument in a manner which could
reasonably be expected to impair the validity and enforceability of this
Agreement or any other Loan Document or materially impair the rights of or
benefits available to the Banks under the Loan Documents or (iii) result in the
creation or imposition under any such indenture, agreement or other instrument
of any Lien upon or with respect to any property or assets now owned or
hereafter acquired by the Borrower.

            SECTION 3.03. Enforceability. This Agreement has been duly executed
and delivered by the Borrower and constitutes, and each other Loan Document when
executed and delivered by the Borrower will constitute, a legal, valid and
binding obligation of the Borrower enforceable against the Borrower in
accordance with its terms.

            SECTION 3.04. Governmental Approvals. No action, consent or approval
of, registration or filing with or any other action by any Governmental
Authority is or will be required in connection with the Transactions, except
such as have been made or obtained and are in full force and effect.

            SECTION 3.05. Financial Statements. The Borrower has heretofore
furnished to the Banks its consolidated balance sheets and statements of income
and statements of cash flow as of and for the fiscal year ended December 31,
2000, audited by and accompanied by the opinion of Deloitte & Touche LLP,
independent public accountants, and as of and for the three-month fiscal period
ended March 31, 2001, certified by a Financial Officer of the Borrower. Such
financial statements present fairly the financial condition and results of
operations of the Borrower and its consolidated subsidiaries as of such dates
and for such periods. Such balance sheets and the notes thereto, together with
the Borrower's Annual Report on Form 10-K for the fiscal year ended December 31,
2000, reflect all liabilities, direct or contingent, of the Borrower and its
consolidated Subsidiaries as of the dates thereof which are material on a
consolidated basis. Such financial statements were prepared in accordance with
GAAP applied (except as noted therein) on a consistent basis.
<PAGE>   50
                                                                              45

            SECTION 3.06. No Material Adverse Change. Except as disclosed in the
Borrower's Annual Report on Form 10-K for the fiscal year ended December 31,
2000, in the Borrower's Form 10-Q for the fiscal quarter ended March 31, 2001
and in any document filed after March 31, 2001, but prior to the date of this
Agreement pursuant to Sections 13(a), 14 or 15(d) of the Securities Exchange Act
of 1934, there has been no change in the business, assets, operations or
financial condition of the Borrower and the Subsidiaries, taken as a whole,
since December 31, 2000, which could reasonably be expected to have a material
adverse effect on the creditworthiness of the Borrower.

            SECTION 3.07. Litigation; Compliance with Laws. (a) Except as set
forth in the Annual Report of the Borrower on Form 10-K for the year ended
December 31, 2000, in the Borrower's Form 10-Q for the fiscal quarter ended
March 31, 2001 or in any document filed after March 31, 2001, but prior to the
date of this Agreement pursuant to Sections 13(a), 14 or 15(d) of the Securities
Exchange Act of 1934, there are not any actions, suits or proceedings at law or
in equity or by or before any Governmental Authority now pending or, to the
knowledge of the Borrower, threatened against or affecting the Borrower or any
Subsidiary or any business, property or rights of any such person (i) which
involve any Loan Document or the Transactions or (ii) which could reasonably be
anticipated, individually or in the aggregate, to result in a Material Adverse
Effect.

            (b) Neither the Borrower nor any of the Subsidiaries is in violation
of any law, rule or regulation, or in default with respect to any judgment,
writ, injunction or decree of any Governmental Authority, where such violation
or default would be reasonably likely to result in a Material Adverse Effect.

            SECTION 3.08. Federal Reserve Regulations. (a) Neither the Borrower
nor any of the Subsidiaries is engaged principally, or as one of its important
activities, in the business of extending credit for the purpose of purchasing or
carrying Margin Stock.

            (b) No part of the proceeds of any Loan or Letter of Credit will be
used, whether directly or indirectly, and whether immediately, incidentally or
ultimately, (i) to purchase or carry Margin Stock or to extend credit to others
for the purpose of purchasing or carrying Margin Stock or to refund indebtedness
originally incurred for such purpose, or (ii) for any purpose which entails a
violation of, or which is inconsistent with, the provisions of the Regulations
of the Board, including Regulation U or X.

            SECTION 3.09. Investment Company Act; Public Utility Holding Company
Act. The Borrower is not (a) an "investment company" as defined in, or subject
<PAGE>   51
                                                                              46

to regulation under, the Investment Company Act of 1940 or (b) subject to
regulation as a "holding company" under the Public Utility Holding Company Act
of 1935.

            SECTION 3.10. Use of Proceeds and Letters of Credit. The Borrower
will use the proceeds of the Loans and the Letters of Credit only for the
purposes specified in the preamble to this Agreement.

            SECTION 3.11. No Material Misstatements. No information, report,
financial statement, exhibit or schedule furnished by or on behalf of the
Borrower to the Agent, the Issuing Bank or any Bank in connection with the
negotiation of any Loan Document or included therein or delivered pursuant
thereto contained, contains or will contain any material misstatement of fact
or, when considered together with all reports theretofore filed with the
Securities and Exchange Commission, omitted, omits or will omit to state any
material fact necessary to make the statements therein, in the light of the
circumstances under which they were, are or will be made, not misleading.

            SECTION 3.12. Employee Benefit Plans. Each of the Borrower and its
ERISA Affiliates is in compliance in all material respects with the applicable
provisions of ERISA and the regulations and published interpretations
thereunder. No Reportable Event has occurred as to which the Borrower or any
ERISA Affiliate was required to file a report with the PBGC, and the present
value of all benefit liabilities under each Plan (based on those assumptions
used to fund such Plan) did not, as of the last annual valuation date applicable
thereto, exceed by more than $10,000,000 the value of the assets of such Plan.

            SECTION 3.13. Environmental and Safety Matters. Each of the Borrower
and each Subsidiary has complied with all Federal, state, local and other
statutes, ordinances, orders, judgments, rulings and regulations relating to
environmental pollution or to environmental or nuclear regulation or control or
to employee health or safety, except where noncompliance would not be reasonably
likely to result in a Material Adverse Effect. Neither the Borrower nor any
Subsidiary has received notice of any failure so to comply, except where
noncompliance would not be reasonably likely to result in a Material Adverse
Effect. The Borrower's and the Subsidiaries' plants do not manage any hazardous
wastes, hazardous substances, hazardous materials, toxic substances, toxic
pollutants or substances similarly denominated, as those terms or similar terms
are used in the Resource Conservation and Recovery Act, the Comprehensive
Environmental Response Compensation and Liability Act, the Hazardous Materials
Transportation Act, the Toxic Substance Control Act, the Clean Air Act, the
Clean Water Act or any other applicable law relating to environmental pollution
or
<PAGE>   52
                                                                              47

employee health and safety, or any nuclear fuel or other radioactive materials,
in violation of any law or any regulations promulgated pursuant thereto, where
such violation would be reasonably likely to result in a Material Adverse
Effect. The Borrower is aware of no events, conditions or circumstances
involving environmental pollution or contamination or employee health or safety
that could reasonably be expected to result in a Material Adverse Effect. The
representations and warranties set forth in this Section 3.13 are, however,
subject to any matters, circumstances or events set forth in the Borrower's
Annual Report on Form 10-K for the fiscal year ended December 31, 2000, in the
Borrower's Form 10-Q for the fiscal quarter ended March 31, 2001 and in any
document filed after March 31, 2001, but prior to the date of this Agreement
pursuant to Sections 13(a), 14 or 15(d) of the Securities Exchange Act of 1934;
provided, however, that the inclusion of such matters, circumstances or events
as exceptions (or any other exceptions contained in the representations and
warranties which refer to the Borrower's Annual Report on Form 10-K for the
fiscal year ended December 31, 2000, the Borrower's Form 10-Q for the fiscal
quarter ended March 31, 2001 or in any document filed after March 31, 2001, but
prior to the date of this Agreement pursuant to Sections 13(a), 14 or 15(d) of
the Securities Exchange Act of 1934) shall not be construed to mean that the
Borrower has concluded that any such matter, circumstance or effect is likely to
result in a Material Adverse Effect.

            SECTION 3.14. Significant Subsidiaries. Schedule 3.14 sets forth as
of the date hereof a list of all Significant Subsidiaries of the Borrower and
the percentage ownership interest of the Borrower therein.

ARTICLE IV. CONDITIONS OF LENDING

            The obligations of the Banks to make Loans and of the Issuing Bank
to issue, amend, renew, or extend Letters of Credit, hereunder are subject to
the satisfaction of the following conditions:

            SECTION 4.01. All Borrowings. On the date of each Borrowing or
issuance, renewal, extension or amending of a Letter of Credit, including each
Borrowing in which Loans are refinanced with new Loans as contemplated by
Section 2.02(e):

               (a) The Agent shall have received a notice of such Borrowing as
        required by Section 2.03.
<PAGE>   53
                                                                              48

               (b) The representations and warranties set forth in Article III
        hereof (except, in the case of a refinancing of Loans or the issuance,
        amendment, renewal or extension of a Letter of Credit or the refinancing
        of an LC Disbursement that does not increase the sum of the Revolving
        Credit Exposure, LC Disbursements and the Auction Loans of any Bank
        outstanding, the representations set forth in Sections 3.06 and 3.07)
        shall be true and correct in all material respects on and as of the date
        of such Borrowing or the date of issuance, amendment, renewal or
        extension of such Letter of Credit with the same effect as though made
        on and as of such date, except to the extent such representations and
        warranties expressly relate to an earlier date.

               (c) The Borrower shall be in compliance with all the terms and
        provisions set forth herein and in each other Loan Document on its part
        to be observed or performed, and at the time of and immediately after
        such Borrowing or the date of issuance, amendment, renewal or extension
        of such Letter of Credit no Event of Default or Default shall have
        occurred and be continuing.

Each Borrowing and issuance, amendment, renewal or extension of such Letter of
Credit shall be deemed to constitute a representation and warranty by the
Borrower on the date of such Borrowing as to the matters specified in paragraphs
(b) and (c) of this Section 4.01.

               SECTION 4.02. First Borrowing. On the date of this Agreement:

               (a) The Agent shall have received the favorable written opinion
        of Heller Ehrman White & McAuliffe, LLP, counsel to the Borrower, dated
        the date of this Agreement and addressed to the Banks, to the effect set
        forth in Exhibit D hereto, and the Borrower hereby instructs such
        counsel to deliver such opinions to the Agent.

               (b) The Agent shall have received evidence satisfactory to it and
        set forth on Schedule 4.02(b) that the Borrower shall have obtained all
        consents and approvals of, and shall have made all filings and
        registrations with, any Governmental Authority required in order to
        consummate the Transactions, in each case without the imposition of any
        condition which, in the judgment of the Banks, could adversely affect
        their rights or interests hereunder.
<PAGE>   54
                                                                              49

               (c) All legal matters incident to this Agreement and the
        borrowings hereunder shall be satisfactory to the Banks and their
        counsel and to Cravath, Swaine & Moore, counsel for the Agent.

               (d) The Agent shall have received (i) a copy of the certificate
        or articles of incorporation, including all amendments thereto, of the
        Borrower, certified as of a recent date by the Secretary of State of the
        state of its organization, and a certificate as to the good standing of
        the Borrower as of a recent date, from such Secretary of State; (ii) a
        certificate of the Secretary or Assistant Secretary of the Borrower
        dated the Closing Date and certifying (A) that attached thereto is a
        true and complete copy of the by-laws of the Borrower as in effect on
        the Closing Date and at all times since a date prior to the date of the
        resolutions described in clause (B) below, (B) that attached thereto is
        a true and complete copy of resolutions duly adopted by the board of
        directors of the Borrower authorizing the execution, delivery and
        performance of the Loan Documents and the borrowings hereunder, and that
        such resolutions have not been modified, rescinded or amended and are in
        full force and effect, (C) that the certificate or articles of
        incorporation of the Borrower have not been amended since the date of
        the last amendment thereto shown on the certificate of good standing
        furnished pursuant to clause (i) above, and (D) as to the incumbency and
        specimen signature of each officer executing any Loan Document or any
        other document delivered in connection herewith on behalf of the
        Borrower; (iii) a certificate of another officer as to the incumbency
        and specimen signature of the Secretary or Assistant Secretary executing
        the certificate pursuant to (ii) above; and (iv) such other documents as
        the Banks or their counsel or Cravath, Swaine & Moore, counsel for the
        Agent, may reasonably request.

               (e) The Agent shall have received a certificate, dated the
        Closing Date and signed by a Financial Officer of the Borrower,
        confirming compliance with the conditions precedent set forth in
        paragraphs (b) and (c) of Section 4.01.

               (f) The Agent shall have received all Fees and other amounts due
        and payable on or prior to the date of this Agreement, including all
        upfront fees payable in connection with the Commitments as specified in
        the invitation letter dated April 19, 2001, and all Fees accrued to the
        date hereof under each Pre-Restatement Credit Agreement whether or not
        then due.
<PAGE>   55
                                                                              50

               (g) The Lenders shall have received a copy of each document filed
        after March 31, 2001, but prior to the date of this Agreement pursuant
        to Sections 13(a), 14 or 15(d) of the Securities Exchange Act of 1934.

               (h) The Agent shall have received a counterpart duly executed by
        the Borrower of the Pledge Agreement, together with one or more
        certificates representing all the Equity Interests in Avista Capital,
        Inc., and stock powers, endorsed in blank, with respect to each such
        certificate.

ARTICLE V. AFFIRMATIVE COVENANTS

            The Borrower covenants and agrees with each Bank and with the
Issuing Bank that so long as this Agreement shall remain in effect or the
principal of or interest on any Loan, any Fees or any other expenses, any LC
Disbursement or amounts payable under any Loan Document shall be unpaid or any
Letter of Credit remains outstanding, unless the Required Banks shall otherwise
consent in writing, the Borrower will:

            SECTION 5.01. Existence; Businesses and Properties. (a) Do or cause
to be done all things necessary to preserve, renew and keep in full force and
effect its legal existence, except as otherwise expressly permitted under
Section 6.02.

            (b) Do or cause to be done all things necessary to obtain, preserve,
renew, extend and keep in full force and effect the rights, licenses, permits,
franchises, authorizations, patents, copyrights, trademarks and trade names
utilized in the conduct of the Borrower's business except where the failure so
to obtain, preserve, renew, extend or maintain any of the foregoing would not
result in a Material Adverse Effect; maintain and operate such business in
substantially the manner in which it is presently conducted and operated, except
as otherwise expressly permitted under this Agreement; comply in all material
respects with all applicable laws, rules, regulations and orders of any
Governmental Authority, whether now in effect or hereafter enacted if failure to
comply with such requirements would result in a Material Adverse Effect; and at
all times maintain and preserve all property material to the conduct of such
business and keep such property in good repair, working order and condition and
from time to time make, or cause to be made, all needful and proper repairs,
renewals, additions, improvements and replacements thereto necessary in order
that the business carried on in connection therewith may be properly conducted
at all times; provided, however, that the Borrower may cause the discontinuance
of the operation or a reduction in the capacity of any of its facilities, or any
element or unit thereof including, without limitation, real and personal
<PAGE>   56
                                                                              51

properties, facilities, machinery and equipment, (i) if, in the judgment of the
Borrower, it is no longer advisable to operate the same, or to operate the same
at its former capacity, and such discontinuance or reduction would not result in
a Material Adverse Effect, or (ii) if the Borrower intends to sell and dispose
of its interest in the same in accordance with the terms of this Agreement and
within a reasonable time shall endeavor to effectuate the same.

            SECTION 5.02. Insurance. (a) Maintain insurance, to such extent and
against such risks, as is customary with companies in the same or similar
businesses and owning similar properties in the same general area in which the
Borrower operates and (b) maintain such other insurance as may be required by
law. All insurance required by this Section 5.02 shall be maintained with
financially sound and reputable insurers or through self-insurance; provided,
however, that the portion of such insurance constituting self-insurance shall be
comparable to that usually maintained by companies engaged in the same or
similar businesses and owning similar properties in the same general area in
which the Borrower operates and the reserves maintained with respect to such
self-insured amounts are deemed adequate by the officer or officers of the
Borrower responsible for insurance matters.

            SECTION 5.03. Taxes and Obligations. Pay and discharge promptly when
due all taxes, assessments and governmental charges or levies imposed upon it or
upon its income or profits or in respect of its property, before the same shall
become delinquent or in default, as well as all lawful claims for labor,
materials and supplies or otherwise which, if unpaid, might give rise to a Lien
upon such properties or any part thereof; provided, however, that such payment
and discharge shall not be required with respect to any such tax, assessment,
charge, levy or claim so long as the validity or amount thereof shall be
contested in good faith by appropriate proceedings and the Borrower shall, to
the extent required by GAAP, have set aside on its books adequate reserves with
respect thereto.

            SECTION 5.04. Financial Statements, Reports, etc. Furnish to the
Agent and each Bank:

               (a) within 105 days after the end of each fiscal year,
        consolidated and consolidating balance sheets and related statements of
        income and statements of cash flow, showing the financial condition of
        (i) Avista Utilities and (ii) the Borrower and its consolidated
        Subsidiaries, in each case as of the close of such fiscal year, and the
        results of each of their operations during such year, all (A) in the
        case of Avista Utilities, certified by one of the Borrower's Financial
        Officers
<PAGE>   57
                                                                              52

        as fairly presenting the financial condition and results of operations
        of Avista Utilities in accordance with GAAP consistently applied and (B)
        in the case of the Borrower and its consolidated subsidiaries, audited
        by Deloitte & Touche or other independent public accountants of
        recognized national standing acceptable to the Required Banks and
        accompanied by an opinion of such accountants (which shall not be
        qualified in any material respect) to the effect that such consolidated
        financial statements fairly present the financial condition and results
        of operations of the Borrower on a consolidated basis (except as noted
        therein) in accordance with GAAP consistently applied;

               (b) within 50 days after the end of each of the first three
        fiscal quarters of each fiscal year, consolidated and, to the extent
        otherwise available, consolidating balance sheets and related statements
        of income and statements of cash flow, showing the financial condition
        of (i) Avista Utilities and (ii) the Borrower and its consolidated
        subsidiaries, in each case as of the close of such fiscal quarter, and
        the results of each of their operations during such fiscal quarter and
        the then elapsed portion of the fiscal year, all certified by one of its
        Financial Officers as fairly presenting the financial condition and
        results of operations of Avista Utilities or the Borrower on a
        consolidated basis, as applicable, in accordance with GAAP consistently
        applied, subject to normal year-end audit adjustments;

               (c) concurrently with any delivery of financial statements under
        (a) or (b) above, (i) a certificate of the relevant accounting firm
        opining on or certifying such statements or Financial Officer (which
        certificate, when furnished by an accounting firm, may be limited to
        accounting matters and disclaim responsibility for legal
        interpretations) certifying that to the knowledge of the accounting firm
        or the Financial Officer, as the case may be, no Event of Default or
        Default has occurred or, if such an Event of Default or Default has
        occurred, specifying the nature and extent thereof and any corrective
        action taken or proposed to be taken with respect thereto, and (ii) a
        certificate of a Financial Officer setting forth in reasonable detail
        such calculations as are required to establish whether the Borrower was
        in compliance with Sections 6.04 and 6.05 on the date of such financial
        statements;

               (d) promptly after the same become publicly available, copies of
        all periodic and other reports, proxy statements and other materials
        filed by it with the Securities and Exchange Commission, or any
        governmental authority succeeding to any of or all the functions of said
        Commission, or with any national securities exchange, or distributed to
        its share holders, as the case may be; and
<PAGE>   58
                                                                              53

               (e) promptly, from time to time, such other information regarding
        the operations, business affairs and financial condition of the Borrower
        or any Significant Subsidiary, or compliance with the terms of any Loan
        Document, as the Agent or any Bank may reasonably request.

                SECTION 5.05. Litigation and Other Notices. Furnish to the Agent
and each Bank prompt written notice of the following:

               (a) any Event of Default or Default, specifying the nature and
        extent thereof and the corrective action (if any) proposed to be taken
        with respect thereto;

               (b) the filing or commencement of, or any written threat or
        notice of intention of any person to file or commence, any action, suit
        or proceeding, whether at law or in equity or by or before any
        Governmental Authority, against the Borrower or any Subsidiary thereof
        which could reasonably be anticipated to result in a Material Adverse
        Effect; and

               (c) any development that has resulted in, or could reasonably be
        anticipated to result in, a Material Adverse Effect.

            SECTION 5.06. ERISA. (a) Comply in all material respects with the
applicable provisions of ERISA and (b) furnish to the Agent and each Bank (i) as
soon as possible, and in any event within 30 days after any Responsible Officer
of the Borrower or any ERISA Affiliate either knows or has reason to know that
any Reportable Event has occurred that alone or together with any other
Reportable Event could reasonably be expected to result in liability of the
Borrower to the PBGC in an aggregate amount exceeding $10,000,000, a statement
of a Financial Officer setting forth details as to such Reportable Event and the
action proposed to be taken with respect thereto, together with a copy of the
notice, if any, of such Reportable Event given to the PBGC, (ii) promptly after
receipt thereof, a copy of any notice the Borrower or any ERISA Affiliate may
receive from the PBGC relating to the intention of the PBGC to terminate any
Plan or Plans (other than a Plan maintained by an ERISA Affiliate which is
considered an ERISA Affiliate only pursuant to subsection (m) or (o) of Section
414 of the Code) or to appoint a trustee to administer any Plan or Plans and
(iii) within 10 days after the due date for filing with the PBGC pursuant to
Section 412(n) of the Code of a notice of failure to make a required installment
or other payment with respect to a Plan, a statement of a Financial Officer
setting forth details as to such failure and the action proposed to be taken
with respect thereto, together with a copy of such notice given to the PBGC.
<PAGE>   59
                                                                              54

            SECTION 5.07. Maintaining Records; Access to Properties and
Inspections. Maintain all financial records in accordance with GAAP and permit
any representatives designated by any Bank to visit and inspect the financial
records and the properties of the Borrower at reasonable times and as often as
requested and to make extracts from and copies of such financial records, and
permit any representatives designated by any Bank to discuss the affairs,
finances and condition of the Borrower with the chief financial officer of the
Borrower, or other person designated by the chief financial officer, and
independent accountants therefor.

            SECTION 5.08. Use of Proceeds and Letters of Credit. Use the
proceeds of the Loans and the Letters of Credit only for the purposes set forth
in the preamble to this Agreement.

            SECTION 5.09. Pledge of Avista Capital, Inc. At all times prior to
the Pledge Release Date, cause Avista Capital, Inc., to remain engaged in the
businesses in which it is engaged on the date hereof (except as a result of the
disposition of any such business to a person that is not an Affiliate of the
Borrower) and not permit Avista Capital, Inc., to pay or make any dividends or
distributions (other than cash dividends or distributions of its income in the
ordinary course of business), to merge or consolidate with any Affiliate of the
Borrower or to transfer any material assets other than on arm's-length terms to
any Affiliate of the Borrower, in each case where such transaction would
materially reduce the value as collateral of the capital stock of Avista
Capital, Inc., pledged under the Pledge Agreement, provided that Avista Capital,
Inc., may transfer any or all the assets owned by it or any of its subsidiaries
that relate to the Coyote Springs 2 project to the Borrower or any of its
Subsidiaries.

ARTICLE VI. NEGATIVE COVENANTS

            The Borrower covenants and agrees with each Bank that, so long as
this Agreement shall remain in effect or the principal of or interest on any
Loan shall be unpaid, any LC Disbursement, any Fees or any other expenses or
amounts payable under any Loan Document shall be unpaid or any Letter of Credit
remains outstanding, unless the Required Banks shall otherwise consent in
writing, the Borrower will not:

            SECTION 6.01. Liens. (A) Create, incur, assume or permit to exist
any Lien on any property or assets (including stock or other securities of any
person,
<PAGE>   60
                                                                              55

including any Subsidiary) now owned or hereafter acquired by it or on any income
or revenues or rights in respect of any thereof, except:

               (a) Liens on property or assets of the Borrower created by the
        documents, instruments or agreements existing on the date hereof and
        which are listed as exhibits to the Borrower's Annual Report on Form
        10-K for the fiscal year ended December 31, 2000, to the extent that
        such Liens secure only obligations arising under such existing
        documents, agreements or instruments;

               (b) any Lien existing on any property or asset prior to the
        acquisition thereof by the Borrower; provided that (i) such Lien is not
        created in contemplation of or in connection with such acquisition and
        (ii) such Lien does not apply to any other property or assets of the
        Borrower;

               (c) the Lien of the First Mortgage;

               (d) Liens permitted under the First Mortgage (whether or not such
        permitted Liens cover properties or assets subject to the Lien of the
        First Mortgage) and any other Liens to which the Lien of the First
        Mortgage is expressly made subject;

               (e) the Lien of any collateral trust mortgage or similar
        instrument which would be intended to eventually replace (in one
        transaction or a series of transactions) the First Mortgage (as amended,
        modified or supplemented from time to time, "Collateral Trust Mortgage")
        on properties or assets of the Borrower to secure bonds, notes and other
        obligations of the Borrower; provided that, so long as the First
        Mortgage shall constitute a Lien on properties or assets of the
        Borrower, the bonds, notes or other obligations issued under the
        Collateral Trust Mortgage (i) shall also be secured by an equal
        principal amount of bonds issued under the First Mortgage or (ii) shall
        be issued against property additions not subject to the Lien of the
        First Mortgage;

               (f) Liens permitted under the Collateral Trust Mortgage (whether
        or not such permitted Liens cover properties or assets subject to the
        Lien of the Collateral Trust Mortgage) and any other Liens to which the
        Lien of the Collateral Trust Mortgage is subject;

               (g) Liens for taxes, assessments or governmental charges not yet
        due or which are being contested in compliance with Section 5.03;
<PAGE>   61
                                                                              56

               (h) carriers', warehousemen's, mechanic's, materialmen's,
        repairmen's or other like Liens arising in the ordinary course of
        business and securing obligations that are not due or which are being
        contested in compliance with Section 5.03;

               (i) pledges and deposits made in the ordinary course of business
        in compliance with workmen's compensation, unemployment insurance and
        other social security laws or regulations;

               (j) Liens incurred or created in connection with or to secure the
        performance of bids, tenders, trade contracts (other than for
        Indebtedness), leases, statutory obligations, surety and appeal bonds,
        performance bonds and other obligations of a like nature incurred in the
        ordinary course of business;

               (k) zoning restrictions, easements, rights-of-way, restrictions
        on use of real property and other similar encumbrances incurred in the
        ordinary course of business which, in the aggregate, are not substantial
        in amount and do not materially detract from the value of the property
        subject thereto or interfere with the ordinary conduct of the business
        of the Borrower or any of its Subsidiaries;

               (l) Liens (i) which secure obligations not assumed by the
        Borrower, (ii) on account of which the Borrower has not and does not
        expect to pay interest directly or indirectly and (iii) which exist upon
        real estate or rights in or relating to real estate in respect of which
        the Borrower has a right-of-way or other easement for purposes of
        substations or transmission or distribution facilities;

               (m) rights reserved to or vested in any federal, state or local
        governmental body or agency by the terms of any right, power, franchise,
        grant, license, contract or permit, or by any provision of law, to
        recapture or to purchase, or designate a purchase of or order the sale
        of, any property of the Borrower or to terminate any such right, power,
        franchise, grant, license, contract or permit before the expiration
        thereof;

               (n) Liens of judgments covered by insurance, or upon appeal and
        covered by bond, or to the extent not so covered not exceeding at one
        time $10,000,000 in aggregate amount;

               (o) any Liens, moneys sufficient for the discharge of which shall
        have been deposited in trust with the trustee or mortgagee under the
        instrument evidencing
<PAGE>   62
                                                                              57

        such Lien, with irrevocable authority of such trustee or mortgagee to
        apply such moneys to the discharge of such Lien to the extent required
        for such purpose;

               (p) rights reserved to or vested in any federal, state or local
        governmental body or agency or other public authority to control or
        regulate the business or property of the Borrower;

               (q) any obligations or duties, affecting the property of the
        Borrower to any federal, state or local governmental body or agency or
        other public authority with respect to any authorization, permit,
        consent or license of such body, agency or authority, given in
        connection with the purchase, construction, equipping, testing and
        operation of the Borrower's utility property;

               (r) with respect to any property which the Borrower may hereafter
        acquire, any exceptions or reservations therefrom existing at the time
        of such acquisition or any terms, conditions, agreements, covenants,
        exceptions and reservations expressed or provided in the deeds of other
        instruments, respectively, under and by virtue of which the Borrower
        shall hereafter acquire the same, none of which materially impairs the
        use of such property for the purposes for which it is acquired by the
        Borrower;

               (s) leases and subleases entered into in the ordinary course of
        business;

               (t) banker's Liens and other Liens in the nature of a right of
        setoff;

               (u) Liens resulting from any transaction permitted under Section
        6.03(v);

               (v) renewals, replacements, amendments, modifications,
        supplements, refinancings or extensions of Liens set forth above to the
        extent that the principal amount of Indebtedness secured by such Lien
        immediately prior thereto is not increased and such Lien is not extended
        to other property (it being understood that such limitation does not
        apply to the Liens described in subsection (c), (e) or (u) above);

               (w) security deposits or amounts paid into trust funds for the
        reclamation of mining properties;

               (x) restrictions on transfer or use of properties and assets,
        first rights of refusal, and rights to acquire properties and assets
        granted to others;
<PAGE>   63
                                                                              58

               (y) non-consensual equitable Liens on the Borrower's
        tenant-in-common or other interest in joint projects;

               (z) Liens on the Borrower's tenant-in-common or other interest in
        joint projects incurred by the project sponsor without the express
        consent of the Borrower to such incurrence; and

               (aa) cash collateral contemplated under Section 2.06(i), the
        pledge of Avista Capital, Inc. stock under the Pledge Agreement and
        Liens granted to the Banks pursuant to Section 6.01(C).

        Notwithstanding anything contained in clauses (a) through (aa) of this
Section 6.01, the Borrower shall not permit any Lien to be created, incurred or
assumed at any time after the date hereof in respect of any asset of the
Borrower or any Subsidiary or on any income or revenue or rights in respect of
any thereof (other than (i) in connection with the Coyote Springs 2 project or
(ii) Liens securing project financing Indebtedness for any project that is
non-recourse to the Borrower and to any of its Subsidiaries other than any
special purpose Subsidiary engaged solely in the business of such project), if
the aggregate outstanding principal amount of all the Indebtedness so secured or
securitized by all such Liens (other than Liens referred to in clauses (i) and
(ii) of the immediately preceding parenthetical) arising after the date hereof,
when taken together with the Attributable Debt outstanding in connection with
any sale and leaseback transaction entered into under (B) below after the date
hereof, would exceed 5% of the total tangible assets of Avista Utilities as of
the date of the financial statements most recently delivered under Section
5.04(a) or (b) at such time.

            (B) Enter into any arrangement, directly or indirectly, with any
person whereby it shall sell or transfer any property, real or personal, used or
useful in its business, whether now owned or hereafter acquired, and thereafter
rent or lease such property or other property which it intends to use for
substantially the same purpose or purposes as the property being sold or
transferred, if as a result thereof the final sentence of Section 6.01(A) would
be breached.

            (C) At any time that the Borrower's 9.75% Senior Notes due June 1,
2008, or any other medium term notes of the Borrower (other than notes issued
under the First Mortgage) are required to be secured by any assets of the
Borrower or any of its Subsidiaries, or shall benefit from any Guarantee or
other form of credit enhancement provided by the Borrower or any of its
Subsidiaries, the Borrower shall cause the obligations under the Loan Documents
to be secured by or to benefit from all such
<PAGE>   64
                                                                              59

collateral and each such Guarantee or other form of credit enhancement on a
ratable basis with the holders of such notes and any other creditors entitled to
share therein.

            SECTION 6.02. Mergers, Consolidations and Acquisitions. Merge into
or consolidate with any other person, or permit any other person to merge into
or consolidate with it, or purchase, lease or otherwise acquire (in one
transaction or a series of transactions) all or substantially all of the assets
of any other person (whether directly by purchase, lease or other acquisition of
all or substantially all of the assets of such person or indirectly by purchase
or other acquisition of all or substantially all of the capital stock of such
other person) other than acquisitions in the ordinary course of the Borrower's
business, except that if (A) at the time thereof and immediately after giving
effect thereto no Event of Default or Default shall have occurred and be
continuing and (B) in the case of any merger or consolidation involving the
Borrower in which the Borrower is not the surviving corporation, the surviving
corporation shall assume in writing the obligations of the Borrower under this
Agreement and any other Loan Documents, then (a) the Borrower may merge or
consolidate with any Subsidiary in a transaction in which the Borrower is the
surviving corporation, (b) the Borrower may purchase, lease or otherwise acquire
from any Subsidiary all or substantially all of its assets and may purchase or
otherwise acquire all or substantially all of the Equity Interests in any person
who immediately thereafter is a Subsidiary, (c) the Borrower may merge with or
into, or consolidate with, any other person so long as (i) in the case where the
business of such other person, or an Affiliate of such other person, entirely or
primarily consists of an electric or gas utility business, the senior secured
long-term debt rating of the Borrower shall be at least BBB or higher by S&P and
Baa2 or higher by Moody's immediately after such merger or consolidation, or in
the case of a merger or consolidation in which the Borrower is not the surviving
entity, the senior secured long-term debt rating of the surviving entity or an
Affiliate thereof shall be at least BBB+ or higher by S&P and Baa1 or higher by
Moody's immediately after such merger or consolidation, or (ii) in the case
where such other person's business does not entirely or primarily consist of an
electric or gas utility business, the assets of such person at the time of such
consolidation or merger do not exceed 10% of the total assets of the Borrower
and its Subsidiaries after giving effect to such merger or consolidation,
computed and consolidated in accordance with GAAP consistently applied, and (d)
the Borrower may purchase, lease or otherwise acquire any or all of the assets
of any other person (and may purchase or otherwise acquire the capital stock of
any other person) so long as (i) the assets being purchased, leased or acquired
(or the assets of the person whose capital stock is being acquired) entirely or
primarily consist of electric or gas utility assets or (ii) in the case where
the assets being purchased, leased or acquired (or the assets of the person
whose capital stock is being acquired) do not entirely or primarily consist of
electric or
<PAGE>   65
                                                                              60

gas utility assets, the assets being acquired (or the Borrower's proportionate
share of the assets of the person whose capital stock is being acquired) do not
exceed 10% of the total assets of the Borrower and its Subsidiaries, after
giving effect to such acquisition, computed and consolidated in accordance with
GAAP consistently applied.

            SECTION 6.03. Disposition of Assets. Sell, lease, transfer, assign
or otherwise dispose of (in one transaction or in a series of transactions), in
any fiscal year, assets (whether now owned or hereafter acquired) which,
together with the amount of all sales, leases, transfers, assignments or other
dispositions permitted under clause (c)(ii) of the definition of Subsidiary
Event in Article I (other than sales, leases, transfers, assignments or other
dispositions permitted under clauses (c)(ii) (A) through (C) in such
definition), exceed 10% of the assets of the Borrower and its Subsidiaries as of
the end of the most recent fiscal year, computed and consolidated in accordance
with GAAP consistently applied, except (i) the Borrower may, in any fiscal year,
sell, lease, transfer, assign or otherwise dispose of assets in the ordinary
course of business which, together with the amount of all sales, leases,
transfers, assignments or other dispositions in the ordinary course permitted
under clause (c)(ii)(A) of the definition of Subsidiary Event in Article I, do
not exceed 5% of the assets of the Borrower and its Subsidiaries as of the end
of the most recent fiscal year, computed and consolidated in accordance with
GAAP consistently applied, (ii) to the extent permitted under Section 5.03, 6.01
or Section 6.02, (iii) the Borrower may sell, lease, transfer, assign or
otherwise dispose of its interest in the Washington Public Power Supply System
Nuclear Project No. 3 in accordance with the settlement agreement among the
Borrower, the Washington Public Power Supply System and Bonneville Power
Administration, as the same may be amended, modified or supplemented from time
to time, (iv) the Borrower may sell, lease, transfer, assign or otherwise
dispose of its interests in the Colstrip Project and related assets, (v) Avista
Energy may conduct its trading operations, (vi) the Borrower may dispose of all
or any portion of its transmission assets in one or more RTO Transactions, and
(vii) the Borrower may sell, lease, transfer, assign or otherwise dispose
(including by way of capital contribution) of, or create, incur, assume or
permit to exist Liens on, receivables and related properties or interests
therein.

            SECTION 6.04. Consolidated Total Debt to Consolidated Total
Capitalization Ratio. Permit the ratio of Consolidated Total Debt to
Consolidated Total Capitalization to be, at the end of any fiscal quarter,
greater than 0.60 to 1.00.

            SECTION 6.05. Consolidated Fixed Charge Coverage Ratio. Permit the
ratio of Consolidated Cash Flow to Consolidated Fixed Charges for any
<PAGE>   66
                                                                              61

four-fiscal-quarter period ending on any date set forth below to be less for
Avista Utilities or for the Borrower and its consolidated subsidiaries than the
ratio set forth below:

<TABLE>
<CAPTION>
               Quarter End            Avista Utilities              Borrower
               -----------            ----------------              --------
<S>                                   <C>                           <C>
                6/30/2001                   1.25                      1.00

                9/30/2001                   1.25                      1.00

               12/31/2001                   1.25                      1.00

                3/31/2002                   1.50                      1.50
</TABLE>

            SECTION 6.06. Public Utility Regulatory Borrowing Limits. Incur
actual borrowings or commitments or issued and outstanding debt of the Borrower
in excess of the amount authorized (i) by statute without necessity of public
utility commission approval and/or (ii) by orders of public utility commissions,
as in effect from time to time.

            SECTION 6.07. Investments. (a) Incur Guarantees of or by the
Borrower with respect to Avista Energy, Inc. in excess of $50,000,000 in the
aggregate or Guarantees of or by the Borrower with respect to Avista Energy,
Inc. with a duration of one year or longer.

            (b) Purchase or acquire any Equity Interests in, make any loan or
advance to, Guarantee any obligation of (in addition to any Guarantee under
Section 6.07(a)), or make any investment or other investment in, any Subsidiary
if after giving effect thereto the aggregate amount of all such investments
purchased, acquired or made during the period January 1 through December 31, (i)
2001, would exceed $100,000,000, or (ii) 2002, would exceed $75,000,000.

ARTICLE VII. EVENTS OF DEFAULT

            In case of the happening (and during the continuance) of any of the
following events ("Events of Default"):

               (a) any representation or warranty made or deemed made in or in
        connection with any Loan Document or the borrowings hereunder, or any
        representation, warranty, statement or information contained in any
        report,
<PAGE>   67
                                                                              62

        certificate, financial statement or other instrument furnished in
        connection with or pursuant to any Loan Document, shall prove to have
        been false or misleading in any material respect when so made, deemed
        made or furnished;

               (b) default shall be made in the payment of any principal of any
        Loan or any reimbursement obligation in respect of any LC Disbursement
        when and as the same shall become due and payable, whether at the due
        date thereof or at a date fixed for prepayment thereof or by
        acceleration thereof or otherwise;

               (c) default shall be made in the payment of any interest on any
        Loan or any Fee or any other amount (other than an amount referred to in
        (b) above) due under any Loan Document, when and as the same shall
        become due and payable, and such default shall continue unremedied for a
        period of five Business Days;

               (d) default shall be made in the due observance or performance by
        the Borrower of any covenant, condition or agreement contained in
        Section 5.01(a), 5.05 or 5.09 or in Article VI;

               (e) default shall be made in the due observance or performance by
        the Borrower of any covenant, condition or agreement contained in any
        Loan Document (other than those specified in (b), (c) or (d) above) and
        such default shall continue unremedied for a period of 30 days after
        notice thereof from the Agent or any Bank to the Borrower;

               (f) the Borrower or any Significant Subsidiary shall (i) fail to
        pay any principal or interest, regardless of amount, due in respect of
        any Indebtedness when the aggregate unpaid principal amount is in excess
        of $25,000,000, when and as the same shall become due and payable (after
        expiration of any applicable grace period), or (ii) fail to observe or
        perform any other term, covenant, condition or agreement (after
        expiration of any applicable grace period) contained in any agreement or
        instrument evidencing or governing any such Indebtedness if the effect
        of any failure referred to in this clause (ii) is to cause, or to permit
        the holder or holders of such Indebtedness or a trustee on its or their
        behalf (with or without the giving of notice, the lapse of time or both)
        to cause, such Indebtedness to become due prior to its stated maturity;

               (g) an involuntary proceeding shall be commenced or an
        involuntary petition shall be filed in a court of competent jurisdiction
        seeking (i) relief in respect of the Borrower or any Significant
        Subsidiary, or of a substantial part of
<PAGE>   68
                                                                              63

        the property or assets of the Borrower or a Significant Subsidiary,
        under Title 11 of the United States Code, as now constituted or
        hereafter amended, or any other Federal or state bankruptcy, insolvency,
        receivership or similar law, (ii) the appointment of a receiver,
        trustee, custodian, sequestrator, conservator or similar official for
        the Borrower or any Significant Subsidiary or for a substantial part of
        the property or assets of the Borrower or a Significant Subsidiary or
        (iii) the winding-up or liquidation of the Borrower or any Significant
        Subsidiary; and such proceeding or petition shall continue undismissed,
        or an order or decree approving or ordering any of the foregoing shall
        be entered and continue unstayed and in effect, for a period of 60 or
        more days;

               (h) the Borrower or any Significant Subsidiary shall (i)
        voluntarily commence any proceeding or file any petition seeking relief
        under Title 11 of the United States Code, as now constituted or
        hereafter amended, or any other Federal or state bankruptcy, insolvency,
        receivership or similar law, (ii) consent to the institution of, or fail
        to contest in a timely and appropriate manner, any proceeding or the
        filing of any petition described in (g) above, (iii) apply for or
        consent to the appointment of a receiver, trustee, custodian,
        sequestrator, conservator or similar official for the Borrower or any
        Significant Subsidiary or for a substantial part of the property or
        assets of the Borrower or any Significant Subsidiary, (iv) file an
        answer admitting the material allegations of a petition filed against it
        in any such proceeding, (v) make a general assignment for the benefit of
        creditors, (vi) become unable, admit in writing its inability or fail
        generally to pay its debts as they become due or (vii) take any action
        for the purpose of effecting any of the foregoing;

               (i) a final judgment or judgments shall be rendered against the
        Borrower, any Significant Subsidiary or any combination thereof for the
        payment of money with respect to which an aggregate amount in excess of
        $25,000,000 is not covered by insurance and the same shall remain
        undischarged for a period of 30 consecutive days during which execution
        shall not be effectively stayed, or any action shall be legally taken by
        a judgment creditor to levy upon assets or properties of the Borrower or
        any Significant Subsidiary to enforce any such judgment;

               (j) a Reportable Event or Reportable Events, or a failure to make
        a required installment or other payment (within the meaning of Section
        412(n)(l) of the Code), shall have occurred with respect to any Plan or
        Plans that reasonably could be expected to result in liability of the
        Borrower to the PBGC or to a Plan in
<PAGE>   69
                                                                              64

        an aggregate amount exceeding $25,000,000 and, within 30 days after the
        reporting of any such Reportable Event to the Agent or after the receipt
        by the Agent of the statement required pursuant to Section 5.06, the
        Agent shall have notified the Borrower in writing that (i) the Required
        Banks have made a determination that, on the basis of such Reportable
        Event or Reportable Events or the failure to make a required payment,
        there are reasonable grounds (A) for the termination of such Plan or
        Plans by the PBGC, (B) for the appointment by the appropriate United
        States District Court of a trustee to administer such Plan or Plans or
        (C) for the imposition of a lien in favor of a Plan and (ii) as a result
        thereof an Event of Default exists hereunder; or a trustee shall be
        appointed by a United States District Court to administer any such Plan
        or Plans; or the PBGC shall institute proceedings to terminate any Plan
        or Plans;

               (k) there shall occur a Subsidiary Event;

               (l) any Loan Document, at any time after its execution and
        delivery and for any reason shall cease to be in full force and effect,
        or is declared by a court of competent jurisdiction to be null and void,
        invalid or unenforceable in any respect; or the Borrower denies that it
        has any or further liability or obligation under any Loan Document, or
        purports to revoke, terminate or rescind any Loan Document; or

               (m) a Change in Control shall occur;

then, and in every such event (other than an event with respect to the Borrower
described in paragraph (g) or (h) above), and at any time thereafter during the
continuance of such event, the Agent, at the request of the Required Banks,
shall, by notice to the Borrower, take either or both of the following actions,
at the same or different times: (i) terminate forthwith the Commitments and (ii)
declare the Loans then outstanding to be forthwith due and payable in whole or
in part, whereupon (A) the Commitments will automatically be terminated and (B)
the principal of the Loans so declared to be due and payable, together with
accrued interest thereon and any unpaid accrued Fees and all other liabilities
of the Borrower accrued hereunder and under any other Loan Document, shall
become forthwith due and payable, without presentment, demand, protest or any
other notice of any kind, all of which are hereby expressly waived by the
Borrower, anything contained herein or in any other Loan Document to the
contrary notwithstanding; and in any event with respect to the Borrower
described in paragraph (g) or (h) above, the Commitments shall automatically
terminate and the principal of the Loans then outstanding, together with accrued
interest thereon and any unpaid accrued Fees and all
<PAGE>   70
                                                                              65

other liabilities of the Borrower accrued hereunder and under any other Loan
Document, shall automatically become due and payable, without presentment,
demand, protest or any other notice of any kind, all of which are hereby
expressly waived by the Borrower, anything contained herein or in any other Loan
Document to the contrary notwithstanding.

ARTICLE VIII. THE AGENT

            In order to expedite the various transactions contemplated by this
Agreement, Toronto Dominion (Texas), Inc. is hereby appointed to act as Agent on
behalf of the Banks and the Issuing Bank. Each of the Banks and the Issuing Bank
hereby irrevocably authorizes and directs the Agent to take such action on
behalf of such Bank under the terms and provisions of this Agreement, and to
exercise such powers hereunder as are specifically delegated to or required of
the Agent by the terms and provisions hereof, together with such powers as are
reasonably incidental thereto. The Agent is hereby expressly authorized on
behalf of the Banks and the Issuing Bank, without hereby limiting any implied
authority, (a) to receive on behalf of each of the Banks any payment of
principal of or interest on the Loans outstanding hereunder, LC Reimbursements
and all other amounts accrued hereunder paid to the Agent, and to distribute to
each Bank its proper share of all payments so received as soon as practicable;
(b) to give notice promptly on behalf of each of the Banks to the Borrower of
any event of default specified in this Agreement of which the Agent has actual
knowledge acquired in connection with its agency hereunder; and (c) to
distribute promptly to each Bank copies of all notices, agreements and other
material as provided for in this Agreement as received by such Agent.

            Neither the Agent nor any of its directors, officers, employees or
agents shall be liable to any Bank as such for any action taken or omitted by
any of them hereunder except for its or his own gross negligence or wilful
misconduct, or be responsible for any statement, warranty or representation
herein or the contents of any document delivered in connection herewith or be
required to ascertain or to make any inquiry concerning the performance or
observance by the Borrower of any of the terms, conditions, covenants or
agreements of this Agreement. The Agent shall not be responsible to the Banks
and the Issuing Bank for the due execution, genuineness, validity,
enforceability or effectiveness of this Agreement or any other instrument to
which reference is made herein. The Agent shall in all cases be fully protected
in acting, or refraining from acting, in accordance with written instructions
signed by the Required Banks, and, except as otherwise specifically provided
herein, such instructions and any
<PAGE>   71
                                                                              66

action taken or failure to act pursuant thereto shall be binding on all the
Banks. The Agent shall, in the absence of knowledge to the contrary, be entitled
to rely on any paper or document believed by it in good faith to be genuine and
correct and to have been signed or sent by the proper person or persons. Neither
the Agent nor any of its directors, officers, employees or agents shall have any
responsibility to the Borrower on account of the failure or delay in performance
or breach by any Bank or the Issuing Bank of any of its obligations hereunder or
to any Bank or the Issuing Bank on account of the failure of or delay in
performance or breach by any other Bank or the Borrower of any of their
respective obligations hereunder or in connection herewith. The Agent may
execute any and all duties hereunder by or through agents or employees and shall
be entitled to advice of legal counsel selected by it with respect to all
matters arising hereunder and shall not be liable for any action taken or
suffered in good faith by it in accordance with the advice of such counsel.

            The Agent and its affiliates may accept deposits from, lend money to
and generally engage in any kind of business with the Borrower or other
affiliate thereof as if it were not the Agent.

            Each Bank recognizes that applicable laws, rules, regulations or
guidelines of governmental authorities may require the Agent to determine
whether the transactions contemplated hereby should be classified as "highly
leveraged" or assigned any similar or successor classification, and that such
determination may be binding upon the other Banks. Each Bank understands that
any such determination shall be made solely by the Agent based upon such factors
(which may include, without limitation, the Agent's internal policies and
prevailing market practices) as the Agent shall deem relevant and agrees that
the Agent shall have no liability for the consequences of any such
determination.

            Each Bank agrees (i) to reimburse the Agent in the amount of such
Bank's pro rata share (based on its Commitment hereunder) of any expenses
incurred for the benefit of the Banks by the Agent, including reasonable counsel
fees and compensation of agents and employees paid for services rendered on
behalf of the Banks, not reimbursed by the Borrower and (ii) to indemnify and
hold harmless the Agent and any of its directors, officers, employees or agents,
on demand, in the amount of its pro rata share, from and against any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements of any kind or nature whatsoever which may be
imposed on, incurred by or asserted against it in its capacity as the Agent or
any of them in any way relating to or arising out of this Agreement or any
action taken or omitted by it or any of them under this Agreement, to the extent
not reimbursed by the
<PAGE>   72
                                                                              67

Borrower; provided, however, that no Bank shall be liable to the Agent for any
portion of such liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, costs, expenses or disbursements resulting from the gross
negligence or wilful misconduct of the Agent or any of its directors, officers,
employees or agents.

            Each Bank acknowledges that it has, independently and without
reliance upon the Agent or any other Bank and based on such documents and
information as it has deemed appropriate, made its own credit analysis and
decision to enter into this Agreement. Each Bank also acknowledges that it will,
independently and without reliance upon the Agent or any other Bank based on
such documents and information as it shall deem appropriate at the time,
continue to make its own decisions in taking or not taking action under or based
upon this Agreement, any related agreement or any document furnished hereunder.

            The Agent may execute any of its duties under this Agreement by or
through agents or attorneys selected by them using reasonable care and shall be
entitled to advice of counsel concerning all matters pertaining to such duties.
The Agent shall not be responsible for the negligence or misconduct of any
agents or attorneys selected and authorized to act by it with reasonable care
unless the damage complained of directly results from an act or failure to act
on part of the Agent which constitutes gross negligence or wilful misconduct.
Delegation to an attorney or agent shall not release the Agent from its
obligation to perform or cause to be performed the delegated duty.

            The Documentation Agent shall not have any rights, powers,
obligations, liabilities, responsibilities or duties under this Agreement other
than those applicable to all Banks as such. Without limiting the foregoing, none
of the Banks identified as "Documentation Agent" shall have or be deemed to have
any fiduciary relationship with any Bank. Each Bank acknowledges that it has not
relied, and will not rely, on any of the Banks so identified in deciding to
enter into this Agreement or in taking or not taking action hereunder.

ARTICLE IX. MISCELLANEOUS

            SECTION 9.01. Notices. Notices and other communications provided for
herein shall be in writing and shall be delivered by hand or overnight courier
service,
<PAGE>   73
                                                                              68

mailed or sent by telecopy, graphic scanning or other telegraphic communications
equipment of the sending party, as follows:

               (a) if to the Borrower, to it at East 1411 Mission Avenue
        (99202), P.O. Box 3727, Spokane, Washington 99220, Attention of the
        Senior Vice President and Chief Financial Officer (Telecopy No.
        509-482-4879);

               (b) if to the Agent, to it at 909 Fannin, Suite 1700, Houston,
        Texas 77010, Attention of Kimberly Burleson (Telecopy No. 713-951-9921);

               (c) if to the Issuing Bank, to it at 909 Fannin, Suite 1700,
        Houston, Texas 77010, Attention of Kimberly Burleson (Telecopy No.
        713-951-0021); and

               (d) if to a Bank, to it at its address (or telecopy number) set
        forth in Schedule 2.01 or in the Assignment and Acceptance pursuant to
        which such Bank shall have become a party hereto.

All notices and other communications given to any party hereto in accordance
with the provisions of this Agreement shall be deemed to have been given on the
date of receipt if delivered by hand or overnight courier service or sent by
telecopy or other telegraphic communications equipment of the sender, or on the
date five Business Days after dispatch by certified or registered mail if
mailed, in each case delivered, sent or mailed (properly addressed) to such
party as provided in this Section 9.01 or in accordance with the latest
unrevoked direction from such party given in accordance with this Section 9.01.

            SECTION 9.02. Survival of Agreement. All covenants, agreements,
representations and warranties, including, without limitation, any indemnities
and reimbursement obligations, made by the Borrower herein and in the
certificates or other instruments prepared or delivered in connection with or
pursuant to this Agreement or any other Loan Document shall be considered to
have been relied upon by the Banks and shall survive the making by the Banks of
the Loans and issuance of any Letters of Credit, and the execution and delivery
to the Banks of any Notes evidencing such Loans, regardless of any investigation
made by the Banks, or on their behalf, or by the Issuing Bank and shall continue
in full force and effect as long as the principal of or any accrued interest on
any Loan or any Fee or any other amount payable under this Agreement or any
other Loan Document is outstanding and unpaid or any Letter of Credit is
outstanding and so long as the Commitments have not been terminated.
<PAGE>   74
                                                                              69

            SECTION 9.03. Binding Effect. This Agreement and the amendment and
restatement reflected hereby shall become effective when it shall have been
executed by the Borrower and the Agent and when the Agent shall have received
copies hereof which, when taken together, bear the signatures of each Bank and
the Issuing Bank, and thereafter shall be binding upon and inure to the benefit
of the Borrower, the Agent, the Issuing Bank and each Bank and their respective
successors and assigns, except that the Borrower shall not have the right to
assign its rights hereunder or any interest herein without the prior consent of
all the Banks and the Issuing Bank.

            SECTION 9.04. Successors and Assigns. (a) Whenever in this Agreement
any of the parties hereto is referred to, such reference shall be deemed to
include the successors and permitted assigns of such party; and all covenants,
promises and agreements by or on behalf of the Borrower, the Agent, the Issuing
Bank or the Banks that are contained in this Agreement shall bind and inure to
the benefit of their respective successors and permitted assigns.

            (b) Each Bank (including the Agent when acting as a Bank) may assign
to one or more assignees all or a portion of its interests, rights and
obligations under this Agreement (including, without limitation, all or a
portion of its Revolving Credit Commitment and the same portion of the
applicable Loan or Loans at the time owing to it other than any Auction Loans,
which may, but need not, be assigned); provided, however, that (i) except in the
case of an assignment to a Bank or Affiliate of such Bank, the Borrower and the
Agent (and, in the case of an assignment of all or a portion of a Commitment or
any Bank's obligation in respect of its LC Exposure, the Issuing Bank) must give
their prior written consent to such assignment (which consent shall not be
unreasonably withheld), (ii) that no assignee of any Bank shall be entitled to
receive any greater payment or protection under Sections 2.13, 2.14(a), 2.15 or
2.19 than such Bank would have been entitled to receive with respect to the
rights assigned or otherwise transferred unless such assignment or transfer
shall have been made at a time when the circumstances giving rise to such
greater payment did not exist, (iii) each such assignment shall be of a
constant, and not a varying, percentage of all the assigning Bank's rights and
obligations under this Agreement, except that this clause (iii) shall not apply
to rights in respect of outstanding Auction Loans, (iv) the amount of the
Commitment of the assigning Bank subject to each such assignment (determined as
of the date the Assignment and Acceptance with respect to such assignment is
delivered to the Agent) shall not be less than $5,000,000 (or, if less, the
total amount of their Commitments), (v) the parties to each such assignment
shall execute and deliver to the Agent an Assignment and Acceptance and a
processing and recordation fee of $3,500 and (vi) the assignee, if it shall not
be a Bank, shall deliver to the Agent an Administrative Questionnaire. Upon
<PAGE>   75
                                                                              70

acceptance and recording pursuant to paragraph (e) of this Section 9.04, from
and after the effective date specified in each Assignment and Acceptance, which
effective date shall be at least five Business Days after the execution thereof,
(A) the assignee thereunder shall be a party hereto and, to the extent of the
interest assigned by such Assignment and Acceptance, have the rights and
obligations of a Bank under this Agreement and (B) the assigning Bank thereunder
shall, to the extent of the interest assigned by such Assignment and Acceptance,
be released from its obligations under this Agreement (and, in the case of an
Assignment and Acceptance covering all or the remaining portion of an assigning
Bank's rights and obligations under this Agreement, such Bank shall cease to be
a party hereto but shall continue to be entitled to the benefits of Sections
2.13, 2.15, 2.19 and 9.05, as well as to any Fees accrued for its account and
not yet paid).

            (c) By executing and delivering an Assignment and Acceptance, the
assigning Bank thereunder and the assignee thereunder shall be deemed to confirm
to and agree with each other and the other parties hereto as follows: (i) such
assigning Bank warrants that it is the legal and beneficial owner of the
interest being assigned thereby free and clear of any adverse claim and that its
Commitment, and the outstanding balances of its Loans, in each case without
giving effect to assignments thereof which have not become effective, are as set
forth in such Assignment and Acceptance; (ii) except as set forth in (i) above,
such assigning Bank makes no representation or warranty and assumes no
responsibility with respect to any statements, warranties or representations
made in or in connection with this Agreement, or the execution, legality,
validity, enforceability, genuineness, sufficiency or value of this Agreement,
any other Loan Document or any other instrument or document furnished pursuant
hereto, or the financial condition of the Borrower or any Subsidiary or the
performance or observance by the Borrower or any Subsidiary of any of its
obligations under this Agreement, any other Loan Document or any other
instrument or document furnished pursuant hereto; (iii) such assignee represents
and warrants that it is legally authorized to enter into such Assignment and
Acceptance; (iv) such assignee confirms that it has received a copy of this
Agreement, together with copies of the most recent financial statements
delivered pursuant to Section 5.04 and such other documents and information as
it has deemed appropriate to make its own credit analysis and decision to enter
into such Assignment and Acceptance; (v) such assignee will independently and
without reliance upon the Agent, such assigning Bank or any other Bank and based
on such documents and information as it shall deem appropriate at the time,
continue to make its own credit decisions in taking or not taking action under
this Agreement; (vi) such assignee appoints and authorizes the Agent to take
such action as agent on its behalf and to exercise such powers under this
Agreement as are delegated to the Agent by the terms hereof, together
<PAGE>   76
                                                                              71

with such powers as are reasonably incidental thereto; and (vii) such assignee
agrees that it will perform in accordance with their terms all the obligations
which by the terms of this Agreement are required to be performed by it as a
Bank.

            (d) The Agent shall maintain a copy of each Assignment and
Acceptance delivered to it including the recordation of the names and addresses
of the Banks, and the Commitment of, and principal amount of the Loans and LC
Disbursements owing to, each Bank pursuant to the terms hereof from time to time
(the "Register"). The Agent, the Issuing Bank and the Banks may treat each
person whose name is recorded in the Register pursuant to the terms hereof as a
Bank hereunder for all purposes of this Agreement. The Register shall be
available for inspection by the Borrower, the Issuing Bank and any Bank, at any
reasonable time and from time to time upon reasonable prior notice.

            (e) Upon its receipt of a duly completed Assignment and Acceptance
executed by an assigning Bank and an assignee, an Administrative Questionnaire
completed in respect of the assignee (unless the assignee shall already be a
Bank hereunder), the processing and recordation fee referred to in paragraph (b)
above and, if required, the written consent of the Borrower and the Agent to
such assignment, the Agent shall (i) accept such Assignment and Acceptance, (ii)
record the information contained therein in the Register and (iii) give prompt
notice thereof to the Banks. Upon the request of the assignee, the Borrower, at
its own expense, shall execute and deliver to the Agent, a new Note or Notes to
the order of such assignee in a principal amount equal to the applicable
Commitment assumed by it pursuant to such Assignment and Acceptance and, if the
assigning Bank has retained a Commitment, upon the request of the assigning
bank, the Borrower shall execute and deliver a new Note to the order of such
assigning Bank in a principal amount equal to the applicable Commitment retained
by it. Canceled Notes shall be returned to the Borrower.

            (f) Each Bank may without the consent of the Borrower, the Issuing
Bank or the Agent sell participations to one or more banks or other entities in
all or a portion of its rights and obligations under this Agreement (including
all or a portion of its Commitment and the Loans owing to it and any Notes held
by it); provided, however, that (i) such Bank's obligations under this Agreement
shall remain unchanged, (ii) such Bank shall remain solely responsible to the
other parties hereto for the performance of such obligations, (iii) the
participating banks or other entities shall be entitled to the benefit of the
cost protection provisions contained in Sections 2.13, 2.15 and 2.19 to the same
extent as if they were Banks (provided, that the amount of such benefit shall be
limited to the amount in respect of the interest sold to which the seller of
such participation would
<PAGE>   77
                                                                              72

have been entitled had it not sold such interest) and (iv) the Borrower, the
Agent, the Issuing Bank and the other Banks shall continue to deal solely and
directly with such Bank in connection with such Bank's rights and obligations
under this Agreement, and such Bank shall retain the sole right to enforce the
obligations of the Borrower relating to the Loans and to approve any amendment,
modification or waiver of any provision of this Agreement (other than
amendments, modifications or waivers decreasing any fees payable hereunder or
the amount of principal of or the rate at which interest is payable on the
Loans, extending any scheduled principal payment date or date fixed for the
payment of interest on the Loans or changing or extending the Commitments).

            (g) Any Bank or participant may, in connection with any assignment
or participation or proposed assignment or participation pursuant to this
Section 9.04, disclose to the assignee or participant or proposed assignee or
participant any information relating to the Borrower furnished to such Bank by
or on behalf of the Borrower; provided that, prior to any such disclosure of
information designated by the Borrower as confidential, each such assignee or
participant or proposed assignee or participant shall execute an agreement
whereby such assignee or participant shall agree (subject to customary
exceptions) to preserve the confidentiality of such confidential information.

            (h) Notwithstanding anything to the contrary contained herein, any
Bank (a "Granting Bank") may grant to a special purpose funding vehicle (an
"SPC") the option to fund all or any part of any Loan that such Granting Bank
would otherwise be obligated to fund pursuant to this Agreement; provided that
(i) nothing herein shall constitute a commitment by any SPC to fund any Loan,
and (ii) if an SPC elects not to exercise such option or otherwise fails to fund
all or any part of such Loan, the Granting Bank shall be obligated to fund such
Loan pursuant to the terms hereof. The funding of a Loan by an SPC hereunder
shall utilize the Commitment of the Granting Bank to the same extent, and as if,
such Loan were funded by such Granting Bank. Each party hereto hereby agrees
that no SPC shall be liable for any indemnity or payment under this Agreement
for which a Bank would otherwise be liable for so long as, and to the extent,
the Granting Bank provides such indemnity or makes such payment. Notwithstanding
anything to the contrary contained in this Agreement, any SPC may disclose on a
confidential basis any non-public information relating to its funding of Loans
to any rating agency, commercial paper dealer or provider of any surety or
guarantee to such SPC. This paragraph may not be amended without the prior
written consent of each Granting Bank, all or any part of whose Loan is being
funded by an SPC at the time of such amendment.

            (i) Any Bank may at any time assign for security purposes all or any
portion of its rights under this Agreement and any Notes issued to it to a
Federal Reserve
<PAGE>   78
                                                                              73

Bank; provided that no such assignment shall release a Bank from any of its
obligations hereunder.

            (j) Subject to Section 6.02, the Borrower shall not assign or
delegate any of its rights or duties hereunder.

            SECTION 9.05. Expenses; Indemnity. (a) The Borrower agrees to pay
(i) all reasonable out-of-pocket expenses incurred by the Agent in connection
with the preparation of this Agreement and the other Loan Documents or in
connection with any amendments, modifications or waivers of the provisions
hereof or thereof (whether or not the transactions hereby contemplated shall be
consummated) or incurred by the Agent or any Bank in connection with the
enforcement or protection of their rights in connection with this Agreement and
the other Loan Documents or in connection with the Loans made or the Notes
issued hereunder, including the fees, charges and disbursements of Cravath,
Swaine & Moore, counsel for the Agent, and, in connection with any such
amendment, modification or waiver or any such enforcement or protection, the
fees, charges and disbursements of any other internal or external counsel for
the Agent, the Issuing Bank or any Bank and (ii) all reasonable out-of-pocket
expenses incurred by the Issuing Bank in connection with the issuance,
amendment, renewal or extension of any Letter of Credit or any demand for
payment thereunder. The Borrower further agrees that it shall indemnify the
Banks from and hold them harmless against any documentary taxes, assessments or
charges made by any Governmental Authority by reason of the execution and
delivery of this Agreement or any of the other Loan Documents.

            (b) The Borrower agrees to indemnify the Agent, the Issuing Bank and
each Bank and each of their respective directors, officers, employees and agents
(each such person being called an "Indemnitee") against, and to hold each
Indemnitee harmless from, any and all losses, claims, damages, liabilities and
related expenses, including reasonable counsel fees, charges and disbursements,
incurred by or asserted against any Indemnitee arising out of, in any way
connected with, or as a result of (i) the execution or delivery of this
Agreement or any other Loan Document or any agreement or instrument contemplated
thereby, the performance by the parties thereto of their respective obligations
thereunder or the consummation of the Transactions and the other transactions
contemplated thereby, (ii) the use of the proceeds of the Loans and of the
Letters of Credit (including any refusal by the Issuing Bank to honor a demand
for payment under a Letter of Credit if the documents presented in connection
with such demand do not strictly comply with the terms of such Letter of Credit)
or (iii) any claim, litigation, investigation or proceeding relating to any of
the foregoing, whether or not any Indemnitee is a party thereto; provided that
such indemnity shall not, as to any
<PAGE>   79
                                                                              74

Indemnitee, be available to the extent that such losses, claims, damages,
liabilities or related expenses are determined by a court of competent
jurisdiction by final and nonappealable judgment to have resulted from the gross
negligence or wilful misconduct of such Indemnitee.

            (c) The provisions of this Section 9.05 shall remain operative and
in full force and effect regardless of the expiration of the term of this
Agreement, the consummation of the transactions contemplated hereby, the
repayment of any of the Loans, the invalidity or unenforceability of any term or
provision of this Agreement or any other Loan Document, or any investigation
made by or on behalf of the Agent, the Issuing Bank or any Bank. All amounts due
under this Section 9.05 shall be payable on written demand therefor.

            SECTION 9.06. Right of Setoff. If an Event of Default shall have
occurred and be continuing and the Loans shall have been accelerated as set
forth in Article VII, each Bank is hereby authorized at any time and from time
to time, to the fullest extent permitted by law, to set off and apply any and
all deposits (general or special, time or demand, provisional or final) at any
time held and other indebtedness at any time owing by such Bank (or bank
Controlling such Bank) to or for the credit or the account of the Borrower
against any of and all the obligations of the Borrower now or hereafter existing
under this Agreement and other Loan Documents held by such Bank. The rights of
each Bank under this Section are in addition to other rights and remedies
(including other rights of setoff) which such Bank may have. Any Bank shall
provide the Borrower with written notice promptly after exercising its rights
under this Section.

            SECTION 9.07. Applicable Law. THIS AGREEMENT AND THE OTHER LOAN
DOCUMENTS SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE
STATE OF NEW YORK.

            SECTION 9.08. Waivers; Amendment. (a) No failure or delay of the
Agent, the Issuing Bank or any Bank in exercising any power or right hereunder
shall operate as a waiver thereof, nor shall any single or partial exercise of
any such right or power, or any abandonment or discontinuance of steps to
enforce such a right or power, preclude any other or further exercise thereof or
the exercise of any other right or power. The rights and remedies of the Agent,
the Issuing Bank and the Banks hereunder and under the other Loan Documents are
cumulative and are not exclusive of any rights or remedies which they would
otherwise have. No waiver of any provision of this Agreement or any other Loan
Document or consent to any departure by the Borrower therefrom shall in any
event be effective unless the same shall be permitted by
<PAGE>   80
                                                                              75

paragraph (b) below, and then such waiver or consent shall be effective only in
the specific instance and for the purpose for which given. No notice or demand
on the Borrower in any case shall entitle the Borrower to any other or further
notice or demand in similar or other circumstances.

            (b) Neither this Agreement nor any provision hereof may be waived,
amended or modified except pursuant to an agreement or agreements in writing
entered into by the Borrower and the Required Banks; provided, however, that no
such agreement shall (i) decrease the principal amount of, or extend the
maturity of or any scheduled principal payment date or date for the payment of
any interest on any Loan or LC Disbursement, or waive or excuse any such payment
or any part thereof, or decrease the rate of interest on any Loan, without the
prior written consent of each Bank affected thereby, (ii) change or extend the
Commitment or decrease the Commitment Fees of any Bank without the prior written
consent of such Bank, or (iii) amend or modify the provisions of Section 2.16,
the provisions of this Section or the definition of "Required Banks", without
the prior written consent of each Bank; provided further that no such agreement
shall amend, modify or otherwise affect the rights or duties of the Agent or the
Issuing Bank hereunder without the prior written consent of the Agent or the
Issuing Bank, as the case may be. Each Bank and each holder of a Note shall be
bound by any waiver, amendment or modification authorized by this Section
regardless of whether its Note shall have been marked to make reference thereto,
and any consent by any Bank or holder of a Note pursuant to this Section shall
bind any person subsequently acquiring a Note from it, whether or not such Note
shall have been so marked.

            SECTION 9.09. Interest Rate Limitation. Notwithstanding anything
herein or in any Notes to the contrary, if at any time the applicable interest
rate, together with all fees and charges which are treated as interest under
applicable law (collectively the "Charges"), as provided for herein or in any
other document executed in connection herewith, or otherwise contracted for,
charged, received, taken or reserved by any Bank, shall exceed the maximum
lawful rate (the "Maximum Rate") which may be contracted for, charged, taken,
received or reserved by such Bank in accordance with applicable law, the rate of
interest payable under any Note held by such Bank, together with all Charges
payable to such Bank, shall be limited to the Maximum Rate.

            SECTION 9.10. Entire Agreement. This Agreement and the other Loan
Documents constitute the entire contract between the parties relative to the
subject matter hereof. Any previous agreement among the parties with respect to
the subject matter hereof is superseded by this Agreement and the other Loan
Documents. Nothing in this Agreement or in the other Loan Documents, expressed
or implied, is intended to confer
<PAGE>   81
                                                                              76

upon any party other than the parties hereto and thereto any rights, remedies,
obligations or liabilities under or by reason of this Agreement or the other
Loan Documents.

            SECTION 9.11. Waiver of Jury Trial. Each party hereto hereby waives,
to the fullest extent permitted by applicable law, any right it may have to a
trial by jury in respect of any litigation directly or indirectly arising out
of, under or in connection with this Agreement or any of the other Loan
Documents. Each party hereto (a) certifies that no representative, agent or
attorney of any other party has represented, expressly or otherwise, that such
other party would not, in the event of litigation, seek to enforce the foregoing
waiver and (b) acknowledges that it and the other parties hereto have been
induced to enter into this Agreement and the other Loan Documents, as
applicable, by, among other things, the mutual waivers and certifications in
this Section 9.11.

            SECTION 9.12. Severability. In the event any one or more of the
provisions contained in this Agreement or in any other Loan Document should be
held invalid, illegal or unenforceable in any respect, the validity, legality
and enforceability of the remaining provisions contained herein and therein
shall not in any way be affected or impaired thereby. The parties shall endeavor
in good-faith negotiations to replace the invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as
possible to that of the invalid, illegal or unenforceable provisions.

            SECTION 9.13. Counterparts. This Agreement may be executed in two or
more counterparts, each of which shall constitute an original but all of which
when taken together shall constitute but one contract, and shall become
effective as provided in Section 9.03.

            SECTION 9.14. Headings. Article and Section headings and the Table
of Contents used herein are for convenience of reference only, are not part of
this Agreement and are not to affect the construction of, or to be taken into
consideration in interpreting, this Agreement.

            SECTION 9.15. Jurisdiction; Consent to Service of Process. (a) The
Borrower hereby irrevocably and unconditionally submits, for itself and its
property, to the nonexclusive jurisdiction of any New York State court or
Federal court of the United States of America sitting in New York City, and any
appellate court from any thereof, in any action or proceeding arising out of or
relating to this Agreement or the other Loan Documents, or for recognition or
enforcement of any judgment, and each of the parties hereto hereby irrevocably
and unconditionally agrees that all claims in respect of any such
<PAGE>   82
                                                                              77

action or proceeding may be heard and determined in such New York State or, to
the extent permitted by law, in such Federal court. Each of the parties hereto
agrees that a final judgment in any such action or proceeding shall be
conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other manner provided by law. Nothing in this Agreement shall affect any
right that the Agent, Issuing Bank or any other Bank may otherwise have to bring
any action or proceeding relating to this Agreement or the other Loan Documents
against the Borrower or its properties in the courts of any jurisdiction.

            (b) The Borrower hereby irrevocably and unconditionally waives, to
the fullest extent it may legally and effectively do so, any objection which it
may now or hereafter have to the laying of venue of any suit, action or
proceeding arising out of or relating to this agreement or the other Loan
Documents in any New York State or Federal court. Each of the parties hereto
hereby irrevocably waives, to the fullest extent permitted by law, the defense
of an inconvenient forum to the maintenance of such action or proceeding in any
such court.

            (c) Each party to this Agreement irrevocably consents to service of
process in the manner provided for notices in Section 9.01. Nothing in this
Agreement will affect the right of any party to this Agreement to serve process
in any other manner permitted by law.

            SECTION 9.16. Pledge Release Date. Promptly after the Pledge Release
Date, the Agent shall (and the Banks hereby authorize and instruct the Agent to)
take such action and execute any such documents as may reasonably be requested
by the Borrower to release the Lien of the Pledge Agreement.
<PAGE>   83
     WITNESS the due execution hereof as the date first above written.

                                     AVISTA CORPORATION,

                                     by  /s/       Ronald R. Peterson
                                         --------------------------------------
                                         Name:     Ronald R. Peterson
                                         Title:    Vice President & Treasurer

                                     TORONTO DOMINION (TEXAS), INC.,
                                     Individually and as Agent,

                                     by  /s/       Jeffery R. Lents
                                         --------------------------------------
                                         Name:     Jeffery R. Lents
                                         Title:    Vice President

<PAGE>   84

                                     THE TORONTO-DOMINION BANK,
                                     as Issuing Bank

                                     by  /s/       Jeffery R. Lents
                                         --------------------------------------
                                         Name:     Jeffery R. Lents
                                         Title:    Manager Syndication &
                                                   Credit Administration

                                     THE BANK OF NEW YORK, individually
                                     and as Documentation Agent,

                                     by  /s/       Steven Kalachman
                                         --------------------------------------
                                         Name:     Steven Kalachman
                                         Title:    Vice President

                                     BANK OF AMERICA N.A.

                                     by  /s/       Leonard Russo
                                         --------------------------------------
                                         Name:     Leonard Russo
                                         Title:    Managing Director

<PAGE>   85

                                     BANK HAPOALIM, B.M.

                                     by  /s/       Marc Bosc
                                         --------------------------------------
                                         Name:     Marc Bosc
                                         Title:    Vice President

                                     by  /s/       Conrad Wagner
                                         --------------------------------------
                                         Name:     Conrad Wagner
                                         Title:    First Vice President

                                     BNP PARIBAS

                                     by  /s/       Mark A. Renaud
                                         --------------------------------------
                                         Name:     Mark A. Renaud
                                         Title:    Director

                                     by  /s/       Dan Cozine
                                         --------------------------------------
                                         Name:     Dan Cozine
                                         Title:    Managing Director

                                     FLEET NATIONAL BANK

                                     by  /s/       Suresh V. Chivukula
                                         --------------------------------------
                                         Name:     Suresh V. Chivukula
                                         Title:    Managing Director

<PAGE>   86

                                     UNION BANK OF CALIFORNIA, N.A.

                                     by  /s/       Sonja Sevcik
                                         --------------------------------------
                                         Name:     Sonja Sevcik
                                         Title:    Assistant Vice President

                                     U.S. BANK, NATIONAL ASSOCIATION

                                     by  /s/       Wilfred C. Jack
                                         --------------------------------------
                                         Name:     Wilfred C. Jack
                                         Title:    Vice President

                                     WELLS FARGO BANK

                                     by  /s/       Tom Beil
                                         --------------------------------------
                                         Name:     Tom Beil
                                         Title:    Vice President

<PAGE>   87
Exhibit A

                                     FORM OF
                                      NOTE

$__________________                                              May 31, 2001
New York, New York

            FOR VALUE RECEIVED, the undersigned, AVISTA CORPORATION, a
Washington corporation (the "Borrower"), hereby promises to pay to the order of
_______________________ (the "Bank"), at the office of Toronto Dominion (Texas),
Inc., (the "Agent"), at 909 Fannin, Suite 1700, Houston, Texas 77010, on the
Expiration Date, as defined in the Amended and Restated Credit Agreement dated
as of May 31, 2001 (the "Credit Agreement"), among the Borrower, the Banks party
thereto and the Agent, the aggregate unpaid principal amount of all Loans (as
defined in the Credit Agreement) made to the Borrower by the Bank pursuant to
the Credit Agreement, in lawful money of the United States of America in
immediately available funds, and to pay interest from the date hereof on the
principal amount hereof from time to time outstanding, in like funds, at said
office, at the rate or rates per annum and payable on the dates provided in the
Credit Agreement.

            The Borrower promises to pay interest, on demand, on any overdue
principal and, to the extent permitted by law, overdue interest from their due
dates at the rate or rates provided in the Credit Agreement.

            The Borrower hereby waives diligence, presentment, demand, protest
and notice of any kind whatsoever. The nonexercise by the holder of any of its
rights hereunder in any particular instance shall not constitute a waiver
thereof in that or any subsequent instance.

            All borrowings evidenced by this Note and all payments and
prepayments of the principal hereof and interest hereon and the respective dates
and maturity dates thereof shall be endorsed by the holder hereof on the
schedule attached hereto and made a part hereof or on a continuation thereof
which shall be attached hereto and made a part hereof, or otherwise recorded by
such holder in its internal records; provided, however, that the failure of the
holder hereof to make such a notation or any error in such a notation shall not
affect the obligations of the Borrower under this Note.

            This Note is one of the Notes referred to in the Credit Agreement,
which, among other things, contains provisions for the acceleration of the
maturity hereof upon the happening of certain events, for optional and mandatory
prepayment of the principal

<PAGE>   88
                                                                               2

hereof prior to the maturity hereof and for the amendment or waiver of certain
provisions of the Credit Agreement, all upon the terms and conditions therein
specified. This Note shall be construed in accordance with and governed by the
laws of the State of New York and any applicable laws of the United States of
America.

                                                     AVISTA CORPORATION

                                                     by
                                                          --------------------
                                                          Name:
                                                          Title:

<PAGE>   89
                                                                               3

                               Loans and Payments
                               ------------------

<TABLE>
<CAPTION>
                 Amount                                                          Name of
                   And                     Payments                              Person
              Type/Class of    Maturity    Principal      Unpaid Principal       Making
   Date           Loan          Date       Interest       Balance of Note       Notation
-----------   -------------    --------    ---------      ----------------      --------
<S>           <C>              <C>         <C>            <C>                   <C>
</TABLE>

<PAGE>   90

Exhibit B

                                     FORM OF
                            ASSIGNMENT AND ACCEPTANCE

            Reference is made to the Amended and Restated Credit Agreement dated
as of May 31, 2001 (as in effect from time to time, the "Credit Agreement"),
among Avista Corporation, a Washington corporation (the "Borrower"), the banks
listed on Schedule 2.01 thereto (the "Banks") and Toronto Dominion (Texas),
Inc., as agent for the Banks (in such capacity, the "Agent"). Terms defined in
the Credit Agreement are used herein with the same meanings.

            1. The Assignor hereby sells and assigns, without recourse, to the
Assignee, and the Assignee hereby purchases and assumes, without recourse, from
the Assignor, effective as of the Effective Date set forth on the reverse
hereof, the interests set forth on the reverse hereof (the "Assigned Interest")
in the Assignor's rights and obligations under the Credit Agreement, including,
without limitation, the interests set forth on the reverse hereof in the
Commitment of the Assignor on the Effective Date and Revolving Loans [and
Auction Loans] owing to the Assignor which are outstanding on the Effective
Date, together with unpaid interest accrued on the assigned Revolving Loans [and
Auction Loans] to the Effective Date, together with the participations in
Letters of Credit and LC Disbursements held by the Assignor on the Effective
Date, and the amount, if any, set forth on the reverse hereof of the Fees
accrued to the Effective Date for the account of the Assignor. Each of the
Assignor and the Assignee hereby makes and agrees to be bound by all the
representations, warranties and agreements set forth in Section 9.04(c) of the
Credit Agreement, a copy of which has been received by each such party. From and
after the Effective Date (i) the Assignee shall be a party to and be bound by
the provisions of the Credit Agreement and, to the extent of the interests
assigned by this Assignment and Acceptance, have the rights and obligations of a
Bank thereunder and under the Loan Documents, and (ii) the Assignor shall, to
the extent of the interests assigned by this Assignment and Acceptance,
relinquish its rights and be released from its obligations under the Credit
Agreement.

            2. This Assignment and Acceptance is being delivered to the Agent
together with (i) if the Assignee is organized under the laws of a jurisdiction
outside the United States, the forms specified in Section 2.19(f) of the Credit
Agreement, duly completed and executed by such Assignee, (ii) if the Assignee is
not already a Bank under the Credit Agreement, an Administrative Questionnaire
in the form of Exhibit C to the Credit Agreement, and (iii) a processing and
recordation fee of $3,500.

            3. This Assignment and Acceptance shall be governed by and construed
in accordance with the laws of the State of New York.

Date of Assignment:

<PAGE>   91
                                                                               2

Legal Name of Assignor:

Legal Name of Assignee:

Assignee's Address for Notices:

Effective Date of Assignment
(may not be fewer than 5 Business
Days after the Date of Assignment):

<PAGE>   92
                                                                               3

<TABLE>
<CAPTION>
                                                             Percentage Assigned of
                                                             Facility and Commitment
                                                             Thereunder (set forth,
                                    Principal Amount         to at least 8 decimals,
                                    Assigned (and            as a percentage of the
                                    Identifying              Facility and the
                                    Information as to        aggregate Commitments
                                    individual               of all
Facility                            Auction Loans)           Banks thereunder)
--------                            -----------------        -----------------------
<S>                                 <C>                      <C>

Commitment Assigned:                      $                            %

Revolving Loans:                          $                            %

[Auction Loans:                           $                           %]

Fees Assigned (if any):                   $                            %
</TABLE>

The terms set forth above and on the reverse side hereof are hereby agreed to:

                                               Accepted:

              , as Assignor                    TORONTO DOMINION (TEXAS), INC.,
                                               as Agent

By: ____________________________               By: _________________________
    Name:                                          Name:
    Title:                                         Title:

_________ , as Assignee                        AVISTA CORPORATION

By: ____________________________               By: _________________________
    Name:                                          Name:
    Title:                                         Title:

<PAGE>   93

Exhibit C

                                     FORM OF
                          ADMINISTRATIVE QUESTIONNAIRE

<PAGE>   94
                                                                               2

Exhibit D

                                     FORM OF
                       OPINION OF COUNSEL FOR THE BORROWER

<PAGE>   95

                                  SCHEDULE 2.01

                                   COMMITMENTS

                                      Banks

<TABLE>
<CAPTION>
Bank                                                                 Commitment
----                                                                 -----------
<S>     <C>                                                          <C>
Toronto Dominion (Texas), Inc.                                       $40,000,000
909 Fannin
Suite 1700
Houston, TX 77010
Attention: Ms. Kimberly Burleson
Telecopy: (713) 951-9921

        With copies to:

        Toronto Dominion Bank U.S.A. Division
        31 West 52nd Street
        New York, NY 10019-6101
        Attention:  Deborah Gravinese
        Telecopy: (212) 827-7244

Bank Hapoalim B.M.                                                   $10,000,000
1177 Avenue of the Americas
New York, NY 10036
Attention: Marc Bosc
Telecopy:  (212) 782-2382

Bank of America, N.A.                                                $25,000,000
Three Allen Center Office
333 Clay Street
Houston, TX 77002
Attention: Irene Rummel
Telecopy:  (713) 651-4801

BNP Paribas                                                          $10,000,000
787 Seventh Avenue
New York, NY 10019
Attention: Thomas Beaumont
Telecopy:  (212) 841-2052
</TABLE>

<PAGE>   96

<TABLE>
<S>     <C>                                                          <C>
Fleet National Bank                                                  $30,000,000
100 Federal Street
Boston, MA 02211
Attention: Suresh Chivukula
Telecopy:  (617) 434-3652

The Bank of New York                                                 $40,000,000
One Wall Street
New York, NY 10286
Attention: Steve Kalachman
Telecopy:  (212) 635-7923

U.S. Bank, N.A.                                                      $20,000,000
1420 Fifth Avenue, 11th Floor
Seattle, WA 98101
Attention: Fred Jack
Telecopy:  (206) 344-3654

Union Bank of California, N.A.                                       $20,000,000
445 S. Figueroa Street
Los Angeles, CA 90071
Attention: Sonja Seveik
Telecopy:  (213) 236-4096

Wells Fargo Bank                                                     $25,000,000
524 W. Riverside
Spokane, WA 99201
Attention: Tom Beil
Telecopy:  (509) 455-5762

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

TOTAL                                                               $220,000,000
</TABLE>

<PAGE>   97

                                  SCHEDULE 3.14

                            Significant Subsidiaries

<TABLE>
<CAPTION>
        Name                        Percent Ownership
        ----                        -----------------
<S>                                 <C>

        Avista Capital, Inc.        100%
</TABLE>

<PAGE>   98

                                SCHEDULE 4.02(b)

                 Statutes and Orders of Governmental Authorities

1.   Statute of Washington authorizing borrowings of one year or less without
     approval and/or Order(s) of the Washington Utilities and Transportation
     Commission.

2.   Statute of Oregon authorizing borrowings of one year or less without
     approval and/or Order(s) of the Oregon Public Utility Commission.

3.   Statute of Idaho authorizing borrowings of one year or less without
     approval and/or Order(s) of the Idaho Public Utilities Commission.

4.   Statute of California authorizing borrowings of one year or less without
     approval and/or Order(s) of the California Public Utilities Commission.<PAGE>   1

                                                                    EXHIBIT 10.1

                               EQUIPMENT SCHEDULE
                           (Quasi Lease - Fixed Rate)
                                SCHEDULE NO. 004
                               DATED THIS 4/13/01
                            TO MASTER LEASE AGREEMENT
                           DATED AS OF AUGUST 14, 2000

LESSOR & MAILING ADDRESS:                         LESSEE & MAILING ADDRESS:
GENERAL ELECTRIC CAPITAL CORPORATION              VIROLOGIC, INC.
401 MERRITT 7 2ND FLOOR                           270 EAST GRAND AVENUE
NORWALK, CT 06856                                 SOUTH SAN FRANCISCO, CA 94080-

This Schedule is executed pursuant to, and incorporates by reference the terms
and conditions of, and capitalized terms not defined herein shall have the
meanings assigned to them in, the Master Lease Agreement identified above
("AGREEMENT", said Agreement and this Schedule being collectively referred to as
"LEASE"). This Schedule, incorporating by reference the Agreement, constitutes a
separate instrument of lease.

A. EQUIPMENT: Subject to the terms and conditions of the Lease, Lessor agrees to
lease to Lessee the Equipment described below (the "EQUIPMENT").

4/13/01
--------------------

NUMBER            CAPITALIZED
OF UNITS          LESSOR'S COST         MANUFACTURER              SERIAL NUMBERS
--------------------------------------------------------------------------------

                  YEAR/MODEL AND TYPE OF EQUIPMENT
--------------------------------------------------

SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF.

Equipment immediately listed above is located at:  345 Oyster Point, South San
                                                   Francisco, San Mateo County,
                                                   CA 94080

                                                   270 E. Grand, South San
                                                   Francisco, San Mateo County,
                                                   CA 94080

B.   FINANCIAL TERMS

<TABLE>
<S>                                                           <C>
 1.  Advance Rent (if any):  $ 22,834.31.                      6.  Lessee Federal Tax ID No.: 943234475.
 2.  Capitalized Lessor's Cost:  $ 697,741.15.                 7.  Last Delivery Date:  4/13/01.
 3.  Basic Term (No. of Months):  36 Months.                   8.  Daily Lease Rate Factor:  .109087.
 4.  Basic Term Lease Rate Factor: 3.272605.                   9.  Interest Rate: 11.64% per annum.
 5.  Basic Term Commencement Date: 4/13/01.                   10.  Option Payment: $ 101.00
</TABLE>

11.    First Termination Date: THIRTY-SIX (36) months after the Basic Term
       Commencement Date.

12.    Interim Rent: For the period from and including the Lease Commencement
       Date to the Basic Term Commencement Date ("INTERIM PERIOD"), Lessee shall
       pay as rent ("INTERIM RENT") for each unit of Equipment, the product of
       the Daily Lease Rate Factor times the Capitalized Lessor's Cost of such
       unit times the number of days in the Interim Period. Interim Rent shall
       be due on NOT APPLICABLE.

13.    Basic Term Rent. Commencing on 4/13/01 and on the same day of each month
       thereafter (each, a "RENT PAYMENT DATE") during the Basic Term, Lessee
       shall pay as rent ("BASIC TERM RENT") the product of the Basic Term Lease
       Rate Factor times the Capitalized Lessor's Cost of all Equipment on this
       Schedule.

14.    Lessee agrees and acknowledges that the Capitalized Lessor's Cost of the
       Equipment as stated on the Schedule is equal to the fair market value of
       the Equipment on the date hereof.

<PAGE>   2

C.     INTEREST RATE: Interest shall accrue from the Lease Commencement Date
       through and including the date of termination of the Lease.

D.     PROPERTY TAX

APPLICABLE TO EQUIPMENT LOCATED IN CALIFORNIA: Lessee agrees that it will (a)
       list all such Equipment, (b) report all property taxes assessed against
       such Equipment and (c) pay all such taxes when due directly to the
       appropriate taxing authority until Lessor shall otherwise direct in
       writing. Upon request of Lessor, Lessee shall promptly provide proof of
       filing and proof of payment to Lessor.

       Lessor may notify Lessee (and Lessee agrees to follow such notification)
       regarding any changes in property tax reporting and payment
       responsibilities.

E.     ARTICLE 2A NOTICE

       IN ACCORDANCE WITH THE REQUIREMENTS OF ARTICLE 2A OF THE UNIFORM
       COMMERCIAL CODE AS ADOPTED IN THE APPLICABLE STATE, LESSOR HEREBY MAKES
       THE FOLLOWING DISCLOSURES TO LESSEE PRIOR TO EXECUTION OF THE LEASE, (A)
       THE PERSON(S) SUPPLYING THE EQUIPMENT IS VARIOUS SUPPLIERS SEE EXHIBIT A
       (THE "SUPPLIER(S)"), (B) LESSEE IS ENTITLED TO THE PROMISES AND
       WARRANTIES, INCLUDING THOSE OF ANY THIRD PARTY, PROVIDED TO THE LESSOR BY
       SUPPLIER(S), WHICH IS SUPPLYING THE EQUIPMENT IN CONNECTION WITH OR AS
       PART OF THE CONTRACT BY WHICH LESSOR ACQUIRED THE EQUIPMENT AND (C) WITH
       RESPECT TO SUCH EQUIPMENT, LESSEE MAY COMMUNICATE WITH SUPPLIER(S) AND
       RECEIVE AN ACCURATE AND COMPLETE STATEMENT OF SUCH PROMISES AND
       WARRANTIES, INCLUDING ANY DISCLAIMERS AND LIMITATIONS OF THEM OR OF
       REMEDIES. TO THE EXTENT PERMITTED BY APPLICABLE LAW, LESSEE HEREBY WAIVES
       ANY AND ALL RIGHTS AND REMEDIES CONFERRED UPON A LESSEE IN ARTICLE 2A AND
       ANY RIGHTS NOW OR HEREAFTER CONFERRED BY STATUTE OR OTHERWISE WHICH MAY
       LIMIT OR MODIFY ANY OF LESSOR'S RIGHTS OR REMEDIES UNDER THE DEFAULT AND
       REMEDIES SECTION OF THE AGREEMENT.

F.     STIPULATED LOSS AND TERMINATION VALUE TABLE*

       SEE ANNEX D ATTACHED HERETO AND MADE A PART HEREOF.

       *The Stipulated Loss Value or Termination Value for any unit of Equipment
       shall be the Capitalized Lessor's Cost of such unit multiplied by the
       appropriate percentage derived from the above table. In the event that
       the Lease is for any reason extended, then the last percentage figure
       shown above shall control throughout any such extended term.

G.     PAYMENT AUTHORIZATION

       You are hereby irrevocably authorized and directed to deliver and apply
       the proceeds due under this Schedule as follows:

<TABLE>
<S>                           <C>                                                              <C>
       COMPANY NAME           ADDRESS                                                          AMOUNT
       ---------------------------------------------------------------------------------------------------
       Virologic, Inc.        270 East Grand Avenue, South San Francisco, CA 94080             $697,741.15
</TABLE>

       This authorization and direction is given pursuant to the same authority
authorizing the above-mentioned financing.

PURSUANT TO THE PROVISIONS OF THE LEASE, AS IT RELATES TO THIS SCHEDULE, LESSEE
HEREBY CERTIFIES AND WARRANTS THAT (i) ALL EQUIPMENT LISTED ABOVE IS IN GOOD
CONDITION AND APPEARANCE, HAS BEEN DELIVERED AND INSTALLED (IF APPLICABLE) AS OF
THE DATE STATED ABOVE AND IN WORKING ORDER; (ii) LESSEE HAS INSPECTED THE
EQUIPMENT, AND ALL SUCH TESTING AS IT DEEMS NECESSARY HAS BEEN PERFORMED BY
LESSEE, SUPPLIER OR THE MANUFACTURER; AND (iii) LESSEE ACCEPTS THE EQUIPMENT FOR
ALL PURPOSES OF THE LEASE AND ALL ATTENDANT DOCUMENTS.

<PAGE>   3

LESSEE DOES FURTHER CERTIFY THAT AS OF THE DATE HEREOF (i) LESSEE IS NOT IN
DEFAULT UNDER THE LEASE; AND (ii) THE REPRESENTATIONS AND WARRANTIES MADE BY
LESSEE PURSUANT TO OR UNDER THE LEASE ARE TRUE AND CORRECT ON THE DATE HEREOF.

       Lessee hereby authorizes Lessor to file a financing statement and
amendments thereto describing the Equipment described in this Schedule and
adding any other collateral described herein and containing any other
information required by the applicable Uniform Commercial Code. Further, Lessee
irrevocably grants to Lessor the power to sign Lessee's name and generally to
act on behalf of Lessee to execute and file financing statements and other
documents pertaining to any or all of the Equipment.

       Except as expressly modified hereby, all terms and provisions of the
Agreement shall remain in full force and effect. This Schedule is not binding or
effective with respect to the Agreement or Equipment until executed on behalf of
Lessor and Lessee by authorized representatives of Lessor and Lessee,
respectively.

       IN WITNESS WHEREOF, Lessee and Lessor have caused this Agreement to be
executed by their duly authorized representatives as of the date first above
written.

LESSOR:                                 LESSEE:

GENERAL ELECTRIC CAPITAL CORPORATION    VIROLOGIC, INC.

By: /s/ Thomas G. Annino                By: /s/ W.D. Young
   ---------------------------------       -------------------------------------

Name: Thomas G. Annino                  Name: W.D. Young
     -------------------------------         -----------------------------------

Title: VP. SR Risk Mngr.                Title: CEO
      ------------------------------          ----------------------------------

<PAGE>   4
                                    ANNEX D
                                       TO
                                SCHEDULE NO. 004
                           TO MASTER LEASE AGREEMENT*
                          DATED AS OF August 14, 2000

                  STIPULATED LOSS AND TERMINATION VALUE TABLE

<Table>
<Caption>
                                        stipulated
          # of      termination               loss
          base            value              value
      payments        % of cost          % of cost
      <S>           <C>                 <C>
             1           99.727            103.646
             2           97.393            101.231
             3           95.036             98.793
             4           92.657             96.332
             5           90.254             93.848
             6           87.828             91.341
             7           85.378             88.811
             8           82.905             86.256
             9           80.407             83.678
            10           77.886             81.075

            11           75.340             78.448
            12           72.769             75.796
            13           70.173             73.119
            14           67.552             70.417
            15           64.906             67.690
            16           62.234             64.936
            17           59.536             62.157
            18           56.812             59.352
            19           54.061             56.521
            20           51.284             53.662
            21           48.480             50.777
            22           45.648             47.865

            23           42.790             44.925
            24           39.903             41.957
            25           36.988             38.961
            26           34.046             35.937
            27           31.074             32.885
            28           28.074             29.804
            29           25.045             26.693
            30           21.986             23.553
            31           18.897             20.384
            32           15.779             17.184
            33           12.630             13.955
            34            9.451             10.694

            35            6.241              7.403
            36            3.000              4.081
</Table>

* The Stipulated Loss Value or Termination Value for any unit of Equipment
shall be equal to the Capitalized Lessor's Cost of such unit multiplied by the
appropriate percentage derived from the above table. In the event that the
Lease is for any reason extended, then the last percentage figure shown above
shall control throughout any such extended term.

<PAGE>   5
                                  BILL OF SALE

     FOR SIX HUNDRED NINETY SEVEN THOUSAND SEVEN HUNDRED FORTY ONE - 15/00
($697,741.15) AND OTHER VALUABLE CONSIDERATION, the receipt and sufficiency of
which are hereby acknowledged, VIROLOGIC, INC. (the "Seller") does hereby sell,
transfer and deliver to GENERAL ELECTRIC CAPITAL CORPORATION (the "Buyer"), its
successors and assigns, all of Seller's right, title and interest in and to the
following equipment (the "Equipment"):

     SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF.

     TO HAVE AND TO HOLD the same unto the Buyer, its successors and assigns,
forever.

     The Seller warrants and represents that it owns (and had good marketable
title to) the Equipment free and clear of all liens and encumbrances, and has
full power, right and authority to convey title thereto to the Buyer. The
foregoing warranty of title shall inure to the benefit of any purchaser of the
Equipment from the Buyer and to General Electric Capital Corporation which is
financing the purchase of the Equipment by the Buyer.

     Except for the foregoing warranty of title, the Equipment is sold, "AS-
IS", "WHERE-IS", without warranty of merchantability of fitness.

     IN WITNESS WHEREOF, the Seller has caused this Bill of Sale to be executed
by a duly authorized officer this _____ day of ____________, 20___.

                                        VIROLOGIC, INC.
                                           (Seller)

                                        By: /s/ W.D. YOUNG
                                           ------------------------------------
                                        Title: CEO
                                              ---------------------------------

<PAGE>   6
                       SECURITY DEPOSIT PLEDGE AGREEMENT
                                    (Lease)

     This Security Deposit Pledge Agreement (this "AGREEMENT") is made and
entered into as of the ninth day of April, 2001 by and between Virologic, Inc.
a California corporation with its principal place of business at 270 EAST GRAND
AVENUE, SOUTH SAN FRANCISCO, CA 94080 ("LESSEE") and General Electric Capital
Corporation, a New York corporation, with its principal place of business at
401 Merrit 7 2nd Floor Norwalk, CT 06856 (together with its successors and
assigns, if any, "Lessor").

     In consideration of, and as an inducement for Lessor to lease certain
equipment under the Master Lease Agreement, dated as of August 14, 2000 (the
"MASTER LEASE AGREEMENT AND ALL SCHEDULES THERETO BEING REFERRED TO AS THE
"LEASE"), and to secure the payment and performance of all of Lessee's
obligations under the Lease, Lessee hereby deposits and pledges with Lessor the
sum of TWENTY TWO THOUSAND EIGHT HUNDRED THIRTY FOUR - 31/100 DOLLARS
($22,834.31) (the "COLLATERAL"), such pledge to be upon the terms and
conditions set forth below:

     1. Lessee delivers the Collateral to Lessor to secure Lessee's performance
of its obligations under the Lease, including, but not limited to, the timely
payment of Rent;

     2. The Collateral deposited with Lessor  will not accrue interest. Lessor
may commingle the Collateral with its other funds.

     3. After any default by Lessee under the Lease and while the same is
continuing, upon, or at any time after said default, Lessor may apply the
Collateral towards the satisfaction of Lessee's obligations under the Lease and
the payment of all costs and expenses incurred by Lessor as a result of such
default, including but not limited to, costs of repossessing equipment and
attorneys' fees. Such application shall not excuse the performance at the time
and in the manner prescribed by any obligation of Lessee or cure a default of
Lessee. Upon the application by Lessor of any amount of the Collateral pursuant
to the terms of this paragraph, Lessee shall be obligated to immediately pay to
Lessor an amount sufficient to cause the Collateral to equal the amount first
set forth above.

     4. Lessor shall have no duty to first commence an action against or seek
recourse from Lessee, in the event of a default under the Lease, before
enforcing the provisions of, and proceedings under the provisions of this
Agreement. The obligations of Lessee under this Agreement shall be absolute and
unconditional and shall remain in full force and effect without regard to, and
shall not be released or discharged or in any way affected by:

          (a) any amendment or modification of or supplement to the Lease;

          (b) any exercise or non-exercise of any right, remedy or privilege
              under or in respect to this Agreement, the Lease, or any other
              instrument provided for in the Lease, or any waiver, consent,
              explanation, indulgence or actions or inaction with respect to any
              such instrument; or

          (c) any bankruptcy, insolvency, reorganization, arrangement,
              readjustment, composition, liquidation or similar proceeding of
              Lease.

     5. Upon the termination of the Lease and the satisfaction of all of the
obligations of Lessee thereunder. Lessor shall deliver to Lessee the Collateral
(less any portion of same cashed, sold, assigned or delivered pursuant to and
under the conditions specified in paragraph 3 hereof), and this Agreement shall
thereupon be without further effect.

     6. Lessor may, without the consent of Lessee, assign this Agreement.
Lessee agrees that if Lessee receives written notice of an assignment from
Lessor, Lessee will pay all amounts due hereunder to such assignee or as
instructed by Lessor. Lessee also agrees to confirm in writing receipt of the
notice of assignment as may be reasonably requested by assignee. Lessee hereby
waives and agrees not to assert against any such assignee any defense, set-off,
recoupment claim or counterclaim which Lessee has or may at any time have
against Lessor for any reason whatsoever.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the date first above written.

LESSOR:                                    LESSEE:

GENERAL ELECTRIC CAPITAL CORPORATION       VIROLOGIC, INC.

By: /s/ THOMAS G. ANNINO                   By: /s/ W.D. YOUNG
  ----------------------------------          -------------------------------

Name: Thomas G. Annino                     Name: W.D. Young
      ------------------------------             ----------------------------

Title: V.P., Sr. Risk Mgr.                 Title: CEO
      ------------------------------             ----------------------------

<PAGE>   7

                                [GE LETTERHEAD]

April 12, 2001

Virologic, Inc.
345 Oyster Point Blvd.
South San Francisco, CA 94080

Re: Disbursement of Funds

Dear Ms Kwok:

     Reference is made herein to a certain Schedule No. 004 to Master Lease
Agreement No. 4108355 dated August 4, 2000 between General Electric Capital
Corporation ("GECC"), as Lessor, and Virologic, Inc. (the "Lessee") as Lessee
(collectively the "Contract") covering the equipment listed therein (the
"Equipment").

     NOW THEREFORE, it is agreed as follows.

The undersigned authorizes and requests GECC to disburse funds in the amount of
$697,741.15 as follows:

<Table>
<Caption>
               PAYABLE                            AMOUNT
               -------                            ------
<S>                                               <C>
               VIROLOGIC, INC.                    $652,072.53
               GECC (ADVANCE RENT)                $ 22,834.31
               GECC (SECURITY DEPOSIT)            $ 22,834.31

               TOTAL PROCEEDS                     $697,741.15
</Table>

Except as provided herein the Contract shall remain in full force and effect.

Very truly yours,

GENERAL ELECTRIC CAPITAL CORPORATION

AGREED TO AND ACKNOWLEDGED:

VIROLOGIC, INC.

By: /s/ KAREN WILSON
    ---------------------------

Title: CFO
       ------------------------

Date: 4/12/01
      -------------------------
<PAGE>   8

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                 Equip                                                    Unit          Ext.       Invoice
Item#        Supplier       Loc: Code     Description           QTY    Serial #           Price        Price        Total
-----        --------       ---- -----    -----------           ---    --------         ----------   ----------  -----------
<S>   <C>                   <C>  <C>   <C>                      <C> <C>                 <C>          <C>         <C>
 1    ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII SERVER         1      53555           $ 3,494.00   $ 3,494.00
                                 SOFT  SHIPPING CHARGES          1                      $    65.00   $    65.00  $  3,559.00

 2    ICS COMPUTER SYSTEMS  B1   SOFT  VERITAS BACKUP EXEC
                                        FOR WIN NT V8.5          1                      $   483.50   $   483.50
                            B1   COMP  LINKSYS ROUTER            5                      $   149.00   $   745.00
                            B1   COMP  LINKSYS ROUTER            5                      $   107.78   $   538.90
                            B1   COMP  DISK KEEPER V6 -
                                         WORKSTATION             1                      $    49.00   $    49.00
                            B1   COMP  DISK KEEPER V6 -
                                         SERVER                  1                      $   249.00   $   249.00
                            B1   COMP  SMART-UPS 2200
                                        LINE INT LAN             1                      $ 1,297.00   $ 1,297.00
                            B1   COMP  BATTERY PACK              1                      $   579.00   $   579.00
                            B1   COMP  SMART-UPS
                                        RECEPTACLE ACCS          1                      $    72.00   $    72.00
                            B1   COMP  PARTITION MAGIC V6        1                      $    58.00   $    58.00
                            B1   COMP  HP XE3 COMPUTER
                                        P3/700 10GB              2                      $ 2,299.00   $ 4,598.00
                            B1   COMP  MONITOR                   2                      $   239.00   $   478.00
                            B1   COMP  PORT REPLICATOR           2                      $   198.00   $   396.00
                                 SOFT  TAX 8.25%                 1                      $   787.33   $   787.33
                                 SOFT  SHIPPING CHARGES          1                      $   193.50   $   193.50  $ 10,524.23

 3    ZONES                 B1   COMP  JP LASERJET 4050
                                        TN PRINTER               1    US2X093679        $ 1,599.00   $ 1,599.00  $  1,599.00

 4    ICS COMPUTER SYSTEMS  B1   COMP  INTEL CELERON 600
                                        MHZ 128 MB MINITOWER     1                      $   699.00   $   699.00
                            B1   COMP  17" SVGA MONITOR          1   7033DF001436       $   199.00   $   199.00
                                 SOFT  FREIGHT CHARGES           1                      $   134.70   $   134.70  $  1,032.70

 5    ICS COMPUTER SYSTEMS  B1   COMP  ATHLON AMD 1GHZ
                                        (ICS SYSTEM)             1      53574           $ 1,498.00   $ 1,498.00
                            B1   COMP  MONITOR                   1       4657           $   199.00   $   199.00
                                 SOFT  FREIGHT CHARGES           1                      $    65.00   $    65.00  $  1,762.00

 7    ZONES                 B1   OFC   HP LASERJET 3200
                                        PRINT/FAX/COPY/SCNR      1                      $   599.00   $   599.00  $    599.00

 8    AVCOM TECHNOLOGIES    B1   COMP  8-BAY INTERNAL
                                        STORAGE  EXPANSION       1       N/A            $   976.10   $   976.10
                                 SOFT  TAX 8.25%                 1                      $    80.53   $    80.53  $  1,056.63

 9    ZONES                 B1   COMP  PHASER 850 N 14PPM
                                        32 MB 800 DPI            1                      $ 2,345.00   $ 2,345.00
                                 SOFT  SHIPPING & HANDLING       1                      $   105.86   $   105.86  $  2,450.86

 10   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII 700 MHZ
                                        128MB SDRAM MID TOWER    1      53436           $ 1,079.00   $ 1,079.00
                            B1   COMP  17" SVGA MONITOR          1   7033DF001437       $   199.00   $   199.00
                                 SOFT  FREIGHT CHARGES           1                      $   181.70   $   181.70  $  1,459.70

 11   ZONES                 B1   COMP  OMNIBOOK LAPTOP           1                      $ 2,273.00   $ 2,273.00
                                 SOFT  SHIPPING & HANDLING       1                      $    39.96   $    39.96  $  2,312.96
                                                                     STW05205323
 12   ZONES                 B1   COMP  OMNIBOOK XE3 LAPTOP       2   STW05107702        $ 2,273.00   $ 4,546.00
                                                                    F2025A00010587
                            B1   COMP  OMNIBOOK PORT REPLICATOR  2  F2025A00010349      $   163.00   $   326.00
                                 SOFT  SHIPPING & HANDLING       1                      $   161.88   $   161.88  $  5,033.88

 14   ZONES                 B1   COMP  AC ADAPTER FOR
                                        OMNIBOOK                 5                      $    75.00   $   375.00
                            B1   COMP  FIRECONNECT 4300
                                        KIT/HOST                 1   SSXOAO47000M       $    68.00   $    68.00
                            B1   COMP  POWERED SPEAKERS         12                      $    14.00   $   168.00
                                 SOFT  HP LIION BATTER FOR
                                        OMNIBOOK                 2                      $   152.00   $   304.00
</TABLE>

<TABLE>
<CAPTION>
                                 Equip                            Vendor
Item#        Supplier       Loc: Code     Description              Total      PO #     Invoice #    Inv Date   Ck #    Ck Date
-----        --------       ---- -----    -----------           ----------    -----   ------------  --------  ------   --------
<S>   <C>                   <C>  <C>   <C>                      <C>           <C>     <C>           <C>       <C>      <C>
 1    ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII SERVER
                                 SOFT  SHIPPING CHARGES         $ 3,559.00    62260      43757      11/28/00  100105   12/18/00

 2    ICS COMPUTER SYSTEMS  B1   SOFT  VERITAS BACKUP EXEC
                                        FOR WIN NT V8.5
                            B1   COMP  LINKSYS ROUTER
                            B1   COMP  LINKSYS ROUTER
                            B1   COMP  DISK KEEPER V6 -
                                         WORKSTATION
                            B1   COMP  DISK KEEPER V6 -
                                         SERVER
                            B1   COMP  SMART-UPS 2200
                                        LINE INT LAN
                            B1   COMP  BATTERY PACK
                            B1   COMP  SMART-UPS
                                        RECEPTACLE ACCS
                            B1   COMP  PARTITION MAGIC V6
                            B1   COMP  HP XE3 COMPUTER
                                        P3/700 10GB
                            B1   COMP  MONITOR
                            B1   COMP  PORT REPLICATOR
                                 SOFT  TAX 8.25%
                                 SOFT  SHIPPING CHARGES           $ 10,524.23  62365     43905      11/30/00  100436    1/12/01

 3    ZONES                 B1   COMP  JP LASERJET 4050
                                        TN PRINTER                $  1,599.00         P12513490102  12/15/00  100254   12/29/00

 4    ICS COMPUTER SYSTEMS  B1   COMP  INTEL CELERON 600
                                        MHZ 128 MB MINITOWER
                            B1   COMP  17" SVGA MONITOR
                                 SOFT  FREIGHT CHARGES            $  1,032.70  62301     43843       12/5/00  100313    12/5/00

 5    ICS COMPUTER SYSTEMS  B1   COMP  ATHLON AMD 1GHZ
                                        (ICS SYSTEM)
                            B1   COMP  MONITOR
                                 SOFT  FREIGHT CHARGES            $  1,762.00  62387     43842       12/5/00  100313    12/5/00

 7    ZONES                 B1   OFC   HP LASERJET 3200
                                        PRINT/FAX/COPY/SCNR       $    599.00    3    P12549250101  12/17/00  100509    1/12/01

 8    AVCOM TECHNOLOGIES    B1   COMP  8-BAY INTERNAL
                                        STORAGE  EXPANSION
                                 SOFT  TAX 8.25%                  $  1,056.63  61200     12337       8/7/00   100383    1/10/01

 9    ZONES                 B1   COMP  PHASER 850 N 14PPM
                                        32 MB 800 DPI
                                 SOFT  SHIPPING & HANDLING        $  2,450.86  62053  P11462400101   11/4/00  100509    1/12/01

 10   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII 700 MHZ
                                        128MB SDRAM MID TOWER
                            B1   COMP  17" SVGA MONITOR
                                 SOFT  FREIGHT CHARGES            $  1,459.70  62323     43844       12/5/00  100436    1/12/01

 11   ZONES                 B1   COMP  OMNIBOOK LAPTOP
                                 SOFT  SHIPPING & HANDLING        $  2,312.96  10063  P12897200101   1/10/01  100690    2/26/01

 12   ZONES                 B1   COMP  OMNIBOOK XE3 LAPTOP

                            B1   COMP  OMNIBOOK PORT REPLICATOR
                                 SOFT  SHIPPING & HANDLING        $  5,033.88    52   P12771670101  12/31/00  100690    2/26/01

 14   ZONES                 B1   COMP  AC ADAPTER FOR
                                        OMNIBOOK
                            B1   COMP  FIRECONNECT 4300
                                        KIT/HOST
                            B1   COMP  POWERED SPEAKERS
                                 SOFT  HP LIION BATTER FOR
                                        OMNIBOOK
</TABLE>

<PAGE>   9

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                 Equip                                                    Unit          Ext.       Invoice
Item#        Supplier       Loc: Code     Description           QTY     Serial #          Price        Price        Total
-----        --------       ---- -----    -----------           ---     --------       -----------  -----------   ----------
<S>   <C>                   <C>  <C>   <C>                      <C>     <C>            <C>          <C>           <C>
                                 SOFT  SHIPPING & HANDLING       1                     $    210.26  $    210.26   $ 1,125.26

 15   HEWLETT PACKARD       B1   OFC   LASERJET 3200
                                        ALL-IN 1 PRINTER        12                     $    569.00  $  6,828.00
      BUSINESS STORE        B1   COMP  OMNIBOOK LEATHER
                                        CARRYING CASE            2                     $    129.00  $    258.00
                                 SOFT  TAX                       1                     $    566.88  $    566.88
                                 SOFT  SHIPPING & HANDLING       1                     $    392.67  $    392.67   $ 8,045.55

 18   ICS COMPUTER SYSTEMS  B1   COMP  PRINTER TEKTRONIX
                                        PHASER                   1        SM0K0850     $  2,499.00  $  2,499.00   $ 2,499.00

 24   HEWLETT PACKARD       B1   COMP  OMNIBOOK 500 P3           1                     $  2,444.00  $  2,444.00
      BUSINESS STORE        B1   COMP  DVD MODULE FOR
                                        OMNIBOOKS                1                     $    335.00  $    335.00
                            B1   COMP  OMNIBOOK LEATHER
                                        CARRYING CASE            1                     $    114.00  $    114.00
                            B1   COMP  64MB MODULE (UPGRADE)     1                     $    136.00  $    136.00
                                 SOFT  SALES TAX                 1                     $    242.32  $    242.32
                                 SOFT  SHIPPING & HANDLING       1                     $      5.00  $      5.00   $ 3,276.32
                                                                           53623
 25   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PENTIUMIII 700
                                        MHZ (ICS SYSTEM)         2         53624       $  1,079.00  $  2,158.00
                            B1   COMP  17" SVGA MONITOR          3                     $    199.00  $    597.00
                            B1   COMP  AGFA 36 BIT SCANNER       1        56ANOX7E     $    119.00  $    119.00
                                 SOFT  SALES TAX 8.25%           1                     $    237.11  $    237.11
                                 SOFT  FREIGHT                   1                     $    165.00  $    165.00   $ 3,276.11

 26   ICS COMPUTER SYSTEMS  B1   COMP  ATHLON 1GHZ MTIBOARD      1                     $  1,938.00  $  1,938.00
                            B1   COMP  17" SVGA BTC MONITOR      1                     $    199.00  $    199.00
                                 SOFT  FREIGHT                   1                     $     65.00  $     65.00   $ 2,202.00

 30   AVCOM TECHNOLOGIES    B1   COMP  18.2GB/ULTRA SCSI
                                        DISK DRIVE               5                     $  1,335.00  $  6,675.00
                            B1   COMP  8-BAY INTERNAL
                                        STORAGE EXPANSION        1        S195531      $  1,010.15  $  1,010.15
                            B1   COMP  COLOR FRAME
                                        BUFFER/CD/VIDEO ADAPTER  1        S166234      $    262.55  $    262.55
                            B1   COMP  BASET WITH MII PCI
                                        ADAPTER                  1        S110583      $    618.55  $    618.55
                            B1   COMP  512-MB EXPANSION MEMORY   2                     $  3,115.00  $  6,230.00
                            B1   COMP  E450 SERVER,3 OPEN
                                        MODULE SLOTS             1                     $ 20,505.60  $ 20,505.60
                            B1   COMP  ULTRASPARC-II CPU
                                         MODULE                  1                     $  4,445.55  $  4,445.55
                                 SOFT  FREIGHT CHARGES           1                     $    478.79  $    478.79  $ 40,226.19

 32   AVCOM TECHNOLOGIES    B1   COMP  ULTRA 5  MODEL 500
                                        256MB DRAM               1      SFWO3860553    $  2,547.60  $  2,547.60
                            B1   COMP  UNIX KIT ACCESSORIES      1                     $     88.00  $     88.00
                            B1   COMP  17" MONITOR               1      SOO24LR1482    $    286.00  $    286.00
                                 SOFT  TAX                       1                     $    241.04  $    241.04
                                 SOFT  FREIGHT                   1                     $    101.71  $    101.71   $ 3,264.35

 33   AVCOM TECHNOLOGIES    B1   COMP  BASET WITH MII PCI
                                        ADAPTER                  1                     $    507.35  $    507.35
                                 SOFT  TAX                       1                     $     41.86  $     41.86
                                 SOFT  FREIGHT                   1                     $      6.42  $      6.42   $   555.63

 34   AVCOM TECHNOLOGIES    B1   COMP  NETWORK HARDWARE CAT
                                        6000 1300W AC PS         2                     $  3,050.13  $  6,100.26
                            B1   COMP  CISCO 827-4V ADSL
                                        ROUTER                   2                     $    761.56  $  1,523.12
                            B1   COMP  CATALYST 6509 CHASSIS     2                     $ 10,692.86  $ 21,385.72
                            B1   COMP  LAN MGMT FOR SOL
                                        INCL:CM 3 CROM RME       1                     $ 11,808.34  $ 11,808.34
                            B1   COMP  CISCO CATALYST 6000
                                        48-PORT                  6                     $  9,908.96  $ 59,453.76
                            B1   COMP  CATALYST 6000 SUPERVISOR
                                        PERP ENGINE1A            4                     $  7,621.99  $ 30,487.96
</TABLE>

<TABLE>
<CAPTION>
                                 Equip                             Vendor
Item#        Supplier       Loc: Code     Description               Total      PO #        Invoice #        Inv Date   Ck #  Ck Date
-----        --------       ---- -----    -----------             ----------   -----      -----------       --------  ------ -------
<S>   <C>                   <C>  <C>   <C>                        <C>          <C>        <C>               <C>       <C>    <C>
                                 SOFT  SHIPPING & HANDLING        $  1,125.26  10096      P13058440101       1/14/01  100820 2/9/01

 15   HEWLETT PACKARD       B1   OFC   LASERJET 3200
                                        ALL-IN 1 PRINTER
      BUSINESS STORE        B1   COMP  OMNIBOOK LEATHER
                                        CARRYING CASE
                                 SOFT  TAX
                                 SOFT  SHIPPING & HANDLING        $  8,045.55  10160        1223480          1/23/01  100865 2/14/01

 18   ICS COMPUTER SYSTEMS  B1   COMP  PRINTER TEKTRONIX
                                        PHASER                    $  2,499.00    26          44434           1/19/01  101115 3/7/01

 24   HEWLETT PACKARD       B1   COMP  OMNIBOOK 500 P3
      BUSINESS STORE        B1   COMP  DVD MODULE FOR
                                        OMNIBOOKS
                            B1   COMP  OMNIBOOK LEATHER
                                        CARRYING CASE
                            B1   COMP  64MB MODULE (UPGRADE)
                                 SOFT  SALES TAX
                                 SOFT  SHIPPING & HANDLING        $  3,276.32  10222        1229715          1/31/01  100966 2/23/01

 25   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PENTIUMIII 700
                                        MHZ (ICS SYSTEM)
                            B1   COMP  17" SVGA MONITOR
                            B1   COMP  AGFA 36 BIT SCANNER
                                 SOFT  SALES TAX 8.25%
                                 SOFT  FREIGHT                    $  3,276.11  10004         44216          12/31/00  101023 2/23/01

 26   ICS COMPUTER SYSTEMS  B1   COMP  ATHLON 1GHZ MTIBOARD
                            B1   COMP  17" SVGA BTC MONITOR
                                 SOFT  FREIGHT                    $  2,202.00  10411         44909           3/2/01   101261 3/15/01

 30   AVCOM TECHNOLOGIES    B1   COMP  18.2GB/ULTRA SCSI
                                        DISK DRIVE
                            B1   COMP  8-BAY INTERNAL
                                        STORAGE EXPANSION
                            B1   COMP  COLOR FRAME
                                        BUFFER/CD/VIDEO ADAPTER
                            B1   COMP  BASET WITH MII PCI
                                        ADAPTER
                            B1   COMP  512-MB EXPANSION MEMORY
                            B1   COMP  E450 SERVER,3 OPEN
                                        MODULE SLOTS
                            B1   COMP  ULTRASPARC-II CPU
                                         MODULE
                                 SOFT  FREIGHT CHARGES            $ 40,226.19  61384         14525           9/7/00   100383 1/10/01

 32   AVCOM TECHNOLOGIES    B1   COMP  ULTRA 5  MODEL 500
                                        256MB DRAM
                            B1   COMP  UNIX KIT ACCESSORIES
                            B1   COMP  17" MONITOR
                                 SOFT  TAX
                                 SOFT  FREIGHT                    $  3,264.35  61709         16763           10/6/00   11465

 33   AVCOM TECHNOLOGIES    B1   COMP  BASET WITH MII PCI
                                        ADAPTER
                                 SOFT  TAX
                                 SOFT  FREIGHT                    $    555.63  61824         17077          10/12/00   11465

 34   AVCOM TECHNOLOGIES    B1   COMP  NETWORK HARDWARE CAT
                                        6000 1300W AC PS
                            B1   COMP  CISCO 827-4V ADSL
                                        ROUTER
                            B1   COMP  CATALYST 6509 CHASSIS
                            B1   COMP  LAN MGMT FOR SOL
                                        INCL:CM 3 CROM RME
                            B1   COMP  CISCO CATALYST 6000
                                        48-PORT
                            B1   COMP  CATALYST 6000 SUPERVISOR
                                        PERP ENGINE1A
</TABLE>

<PAGE>   10

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                 Equip                                                    Unit          Ext.       Invoice
Item#        Supplier       Loc: Code     Description           QTY    Serial #           Price        Price        Total
-----        --------       ---- -----    -----------           ---    --------        -----------  -----------  -----------
<S>   <C>                   <C>  <C>   <C>                      <C>   <C>              <C>          <C>          <C>
                            B1   COMP  PACKAGE SMARTNET
                                        CAT 10 CROM              1                     $  1,595.00  $  1,595.00
                            B1   COMP  PACKAGED SMARTNET
                                        CAT 17 CROM              2                     $  8,700.00  $ 17,400.00
                            B1   COMP  CISCO 827 SERIES
                                        IOS VOICE PLUS           2                     $    152.52  $    305.04
                                 SOFT  TAX                       1                     $ 12,755.03  $ 12,755.03
                                 SOFT  FREIGHT                   1                     $     15.54  $     15.54  $ 162,829.77

 35   AVCOM TECHNOLOGIES    B1   COMP  PACKAGED SMARTNET
                                        CAT 1 CROM               2                     $    123.00  $    246.00
                            B1   COMP  I-PORT T1/FRACTIONAL
                                        TI DSU                   8                     $    762.76  $  6,102.08
                            B1   COMP  1XETHERNET 2XWAN CARD
                                        SLOT NTWK MOD            2                     $  1,143.95  $  2,287.90
                            B1   COMP  SW CLIENT & US
                                        POWERCORD                1                     $  3,069.51  $  3,069.51
                            B1   COMP  4-SLOT MODULAR
                                        ROUTER                   1                     $  4,961.07  $  4,961.07
                            B1   COMP  CISCO 2PT WAN IF CARD
                                        SLOT NETWORK MOD         2                     $  1,143.91  $  2,287.82
                            B1   COMP  PACKAGED SMARTNET
                                        CAT 4 CROM               1                     $    406.00  $    406.00
                                 SOFT  TAX                       1                     $  1,645.63  $  1,645.63
                                 SOFT  FREIGHT                   1                     $    169.50  $    169.50   $ 21,175.51

 36   AVCOM TECHNOLOGIES    B1   COMP  COLOR FRAME BUFFER        1        N/A          $    259.00  $    259.00
                            B1   COMP  BASET W/ ADAPTER          1                     $    500.40  $    500.40
                            B1   COMP  ULTRASPARC CPU MODULE     1        N/A          $  4,395.60  $  4,395.60
                            B1   COMP  INTRNAL DRIVE             1        N/A          $    972.00  $    972.00
                            B1   COMP  17" COLOR MONITOR         1        N/A          $    286.00  $    286.00
                            B1   COMP  ULTRA SCSI DISK DRIVE     5        N/A          $  1,320.00  $  6,600.00
                            B1   COMP  SLIM KIT FOR SPARC        1                     $  1,196.00  $  1,196.00
                            B1   COMP  E450 SERVER/TOWER         1                     $ 17,877.20  $ 17,877.20
                                 SOFT  SOLARIS 7                 1                     $     90.00  $     90.00
                                 SOFT  TAX                       1                     $  2,654.53  $  2,654.53
                                 SOFT  FREIGHT                   1                     $    179.45  $    179.45   $ 35,010.18

 37   AVCOM TECHNOLOGIES    B1   SOFT  ENTERPRISE PLUS
                                        CROM FEATURE PACK        1                     $  1,252.35  $  1,252.35
                            B1   COMP  MEM FLASH SIMMS           1                     $    744.33  $    744.33
                            B1   COMP  ENET NETWORK MODULE       1                     $    783.32  $    783.32
                            B1   COMP  4-SLOT MODULAR ROUTER     1                     $  5,093.96  $  5,093.96
                            B1   COMP  1PT FETH-NTWK MOD         1                     $  1,566.05  $  1,566.05
                            B1   COMP  8MB FLASH SIMM            1                     $    547.96  $    547.96
                            B1   COMP  CONT-SNT PACKAGED         1                     $    940.63  $    940.63
                                 SOFT  TAX                       1                     $    901.61  $    901.61
                                 SOFT  FREIGHT                   1                     $     65.66  $     65.66   $ 11,895.87

 38   AVCOM TECHNOLOGIES    B1   COMP  E450 SERVER/TOWER         1      032H3A64       $ 17,877.20  $ 17,877.20
                            B1   COMP  DISK DRIVE                1                     $  1,320.00  $  1,320.00
                            B1   COMP  INTERNAL DRIVE            1     0013L05407      $    972.00  $    972.00
                            B1   COMP  17" COLOR MONITOR         1      0026LR005      $    286.00  $    286.00
                            B1   COMP  COLOR FRAME
                                        BUFFER/ADAPTOR           1       167681        $    259.60  $    259.60
                            B1   COMP  BASET MII PCI ADAPTER     1                     $    500.40  $    500.40
                                 SOFT  TAX                       1                     $  1,750.25  $  1,750.25
                                 SOFT  FREIGHT                   1                     $    168.56  $    168.56   $ 23,134.01

 43   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII MOTHERBOARD
                                        (ICS SYSTEM)             1        53694        $  1,428.00  $  1,428.00
                            B1   COMP  17" MONITOR               1         543         $    199.00  $    199.00
                                 SOFT  FREIGHT                   1                     $     65.00  $     65.00   $  1,692.00
</TABLE>

<TABLE>
<CAPTION>
                                 Equip                             Vendor
Item#        Supplier       Loc: Code     Description               Total      PO #     Invoice #   Inv Date   Ck #    Ck Date
-----        --------       ---- -----    -----------             ----------   -----  ------------  --------  ------   --------
<S>   <C>                   <C>  <C>   <C>                        <C>          <C>    <C>           <C>       <C>      <C>

                            B1   COMP  PACKAGE SMARTNET
                                        CAT 10 CROM
                            B1   COMP  PACKAGED SMARTNET
                                        CAT 17 CROM
                            B1   COMP  CISCO 827 SERIES
                                        IOS VOICE PLUS
                                 SOFT  TAX
                                 SOFT  FREIGHT                   $ 162,829.77  61668     16715       10/5/00   11343    11/1/01

 35   AVCOM TECHNOLOGIES    B1   COMP  PACKAGED SMARTNET
                                        CAT 1 CROM
                            B1   COMP  I-PORT T1/FRACTIONAL
                                        TI DSU
                            B1   COMP  1XETHERNET 2XWAN CARD
                                        SLOT NTWK MOD
                            B1   COMP  SW CLIENT & US
                                        POWERCORD
                            B1   COMP  4-SLOT MODULAR
                                        ROUTER
                            B1   COMP  CISCO 2PT WAN IF CARD
                                        SLOT NETWORK MOD
                            B1   COMP  PACKAGED SMARTNET
                                        CAT 4 CROM
                                 SOFT  TAX
                                 SOFT  FREIGHT                   $  21,175.51  61668     16511       10/3/00   11343    11/1/01

 36   AVCOM TECHNOLOGIES    B1   COMP  COLOR FRAME BUFFER
                            B1   COMP  BASET W/ ADAPTER
                            B1   COMP  ULTRASPARC CPU MODULE
                            B1   COMP  INTRNAL DRIVE
                            B1   COMP  17" COLOR MONITOR
                            B1   COMP  ULTRA SCSI DISK DRIVE
                            B1   COMP  SLIM KIT FOR SPARC
                            B1   COMP  E450 SERVER/TOWER
                                 SOFT  SOLARIS 7
                                 SOFT  TAX
                                 SOFT  FREIGHT                   $  35,010.18  61200     12334       8/7/00    10765

 37   AVCOM TECHNOLOGIES    B1   SOFT  ENTERPRISE PLUS
                                        CROM FEATURE PACK
                            B1   COMP  MEM FLASH SIMMS
                            B1   COMP  ENET NETWORK MODULE
                            B1   COMP  4-SLOT MODULAR ROUTER
                            B1   COMP  1PT FETH-NTWK MOD
                            B1   COMP  8MB FLASH SIMM
                            B1   COMP  CONT-SNT PACKAGED
                                 SOFT  TAX
                                 SOFT  FREIGHT                   $  11,895.87  61308     13680       8/25/00   10804    9/20/00

 38   AVCOM TECHNOLOGIES    B1   COMP  E450 SERVER/TOWER
                            B1   COMP  DISK DRIVE
                            B1   COMP  INTERNAL DRIVE
                            B1   COMP  17" COLOR MONITOR
                            B1   COMP  COLOR FRAME
                                        BUFFER/ADAPTOR
                            B1   COMP  BASET MII PCI ADAPTER
                                 SOFT  TAX
                                 SOFT  FREIGHT                   $  23,134.01  61262     13619       8/25/00   10804    9/20/00

 43   ICS COMPUTER SYSTEMS  B1   COMP  INTEL PIII MOTHERBOARD
                                        (ICS SYSTEM)
                            B1   COMP  17" MONITOR
                                 SOFT  FREIGHT                   $   1,692.00  10411     44883       2/28/01   101261   3/15/01
</TABLE>

<PAGE>   11

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                 Equip                                                   Unit          Ext.         Invoice
Item#      Supplier         Loc: Code     Description           QTY       Serial #       Price        Price          Total
-----      --------         ---- -----    -----------           ---      ----------   ------------  -----------   ------------
<S>   <C>                   <C>  <C>   <C>                      <C>      <C>          <C>           <C>           <C>
 51   WHL ARCHITECTS             SOFT  PROJ 99128 SENIOR DRAFT   1                    $   1,350.00  $   1,350.00
                                 SOFT  CONSULTANT EXPENSES       1                    $     104.00  $     104.00  $   1,454.00

 52   WHL ARCHITECTS             SOFT  REPRODUCTION EXPENSES     1                    $   1,111.07  $   1,111.07
                                 SOFT  POSTAGE/COURIER           1                    $      88.95  $      88.95  $   1,200.02

                                               FUNDING TOTAL                                        $ 354,251.73  $ 354,251.73
</TABLE>

<TABLE>
<CAPTION>
                                 Equip                               Vendor
Item#      Supplier         Loc: Code     Description                 Total      PO #   Invoice #   Inv Date   Ck #    Ck Date
-----      --------         ---- -----    -----------              ----------   -----  -----------  --------  ------   --------
<S>   <C>                   <C>  <C>   <C>                       <C>            <C>    <C>          <C>       <C>      <C>
 51   WHL ARCHITECTS             SOFT  PROJ 99128 SENIOR DRAFT
                                 SOFT  CONSULTANT EXPENSES       $   1,454.00    N/A      9574       1/11/01  100589

 52   WHL ARCHITECTS             SOFT  REPRODUCTION EXPENSES
                                 SOFT  POSTAGE/COURIER           $   1,200.02    N/A      9573       1/11/01  100589

                                                                 $ 354,251.73
</TABLE>

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B2   345 OYSTER POINT
                                 SOUTH SAN FRANCISCO, CA 94080

<TABLE>
<CAPTION>
                                   Equip                                                  Unit          Ext.       Invoice
Item#       Supplier          Loc: Code        Description       QTY    Serial #          Price        Price        Total
-----       --------          ---- -----       -----------       ---    --------        ----------   ----------   ----------
<S>   <C>                     <C>  <C>   <C>                     <C>  <C>               <C>          <C>          <C>
 13   ZONES                    B2  COMP  OMNIBOOK XE3 LAPTOP     1    STWO5205079       $ 2,273.00   $ 2,273.00   $ 2,273.00

                                                                         53599
                                                                         53600
 16   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PENTIUMIII
                                          700 MHZ (ICS SYSTEM)   3       53601          $ 1,079.00   $ 3,237.00
                                                                         0631
                                                                         2514
                               B2  COMP  17" SVGA BTC MONITOR    3       2530           $   199.00   $   597.00

                                   SOFT  TAX  8.25%              1                      $   316.31   $   316.31
                                   SOFT  FREIGHT                 1                      $   225.00   $   225.00   $ 4,375.31

                                                                         53645
                                                                         53646
 17   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PENTIUMIII
                                          700 MHZ (ICS SYSTEM)   3       53647          $ 1,179.00   $ 3,537.00
                                                                          622
                                                                          916
                               B2  COMP  17" SVGA BTC MONITOR    3        922           $   199.00   $   597.00
                                   SOFT  FREIGHT                 1                      $   165.00   $   165.00   $ 4,299.00

 19   AMERSHAM PHARMACIA       B2  LAB   ULTROSPEC 4000
                                          SPECTROP HOTOMETER     1                      $ 9,030.40   $ 9,030.40
                                   SOFT  TAX  8.25%              1                      $   745.01   $   745.01   $ 9,775.41

 20   AMERSHAM PHARMACIA       B2  LAB   SIPPER UNIT AND
                                          FLOW CELL              1                      $ 2,304.00   $ 2,304.00
                                   SOFT  TAX  8.25%              1                      $   184.32   $   184.32
                                   SOFT  HANDLING AND
                                          INSURANCE              1                      $    16.00   $    16.00   $ 2,504.32

 21   VWR SCIENTIFIC PRODUCTS  B2  LAB   CENTRFUG ROTR           1                      $ 2,400.00   $ 2,400.00
                               B2  LAB   SHAKER, ORBIT
                                          ENVIRON                1                      $ 3,526.56   $ 3,526.56
                               B2  LAB   ACRO 50 PTFE            3                      $   139.04   $   417.12
                                   SOFT  TAX                     1                      $   507.50   $   507.50   $ 6,851.18

 22   VWR SCIENTIFIC PRODUCTS  B2  FURN  WALL CLOCK              1                      $    34.83   $    34.83
                               B2  LAB   MINICENTRIFUGE
                                          W/ ADPT                1                      $   290.00   $   290.00
                               B2  LAB   BASIC 210G CAPX,BALANCE
                                          METTLER TOLEDO         1                      $ 2,615.80   $ 2,615.80
</TABLE>

<TABLE>
<CAPTION>
                                   Equip                             Vendor
Item#       Supplier          Loc: Code        Description           Total     PO #    Invoice #    Inv Date  Ck #      Ck Date
-----       --------          ---- -----       -----------         ----------  -----  ------------  --------  ----      -------
<S>   <C>                     <C>  <C>   <C>                       <C>         <C>      <C>         <C>       <C>       <C>
 13   ZONES                    B2  COMP  OMNIBOOK XE3 LAPTOP       $ 2,273.00  10096  P13058440103   1/13/01  100767     2/2/01

 16   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PENTIUMIII
                                          700 MHZ (ICS SYSTEM)
                               B2  COMP  17" SVGA BTC MONITOR

                                   SOFT  TAX  8.25%
                                   SOFT  FREIGHT                   $ 4,375.31      4     44215      12/31/00  101023    2/23/01

 17   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PENTIUMIII
                                          700 MHZ (ICS SYSTEM)
                               B2  COMP  17" SVGA BTC MONITOR

                                   SOFT  FREIGHT                   $ 4,299.00  10153     44495       1/24/01   101023   2/23/01

 19   AMERSHAM PHARMACIA       B2  LAB   ULTROSPEC 4000
                                          SPECTROP HOTOMETER
                                   SOFT  TAX  8.25%                $ 9,775.41  62443     792295     12/28/00  100397    1/12/01

 20   AMERSHAM PHARMACIA       B2  LAB   SIPPER UNIT AND
                                          FLOW CELL
                                   SOFT  TAX  8.25%
                                   SOFT  HANDLING AND
                                          INSURANCE                $ 2,504.32  10071     816497      1/22/01  100834    2/14/01

 21   VWR SCIENTIFIC PRODUCTS  B2  LAB   CENTRFUG ROTR
                               B2  LAB   SHAKER, ORBIT
                                          ENVIRON
                               B2  LAB   ACRO 50 PTFE
                                   SOFT  TAX                       $ 6,851.18  10195     6257499     1/23/01  100829    2/14/01

 22   VWR SCIENTIFIC PRODUCTS  B2  FURN  WALL CLOCK
                               B2  LAB   MINICENTRIFUGE
                                          W/ ADPT
                               B2  LAB   BASIC 210G CAPX,BALANCE
                                          METTLER TOLEDO
</TABLE>

<PAGE>   12

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                   Equip                                                Unit           Ext.       Invoice
Item#       Supplier          Loc: Code        Description       QTY  Serial #          Price          Price       Total
-----       --------          ---- -----       -----------       ---  --------        ----------    -----------  ----------
<S>   <C>                     <C>  <C>   <C>                     <C>  <C>             <C>           <C>          <C>
                               B2  LAB   CYLINDER 500 ML         1                    $      28.18  $     28.18
                               B2  LAB   CYLINDER 250 ML         1                    $      21.64  $     21.64
                               B2  LAB   CYLINDER 50 ML          1                    $      13.90  $     13.90
                                   SOFT  TAX                     1                    $     522.49  $    522.49  $  3,526.84

 23   THERMOFORMA              B2  FURN  BIO SAFE CABINET        1                    $   7,267.00  $  7,267.00
                               B2  FURN  EXH TRAN AT/TMBL
                                          W/ 8" DAMP             1                    $     454.67  $    454.67
                                   SOFT  TAX                     1                    $     637.04  $    637.04
                                   SOFT  FREIGHT                 1                    $     760.00  $    760.00  $  9,118.71

 27   FORMA SCIENTIFIC         B2  LAB   CONSOLE INCUBATOR
                                          SHAKER                 1                    $   7,264.38  $  7,264.38
      (THERMOFORMA)            B2  LAB   UNIV PLATFORM           1                    $     647.80  $    647.80
                               B2  LAB   1 LTR FLASK CLIP
                                          ASSY                   1                    $      29.52  $     29.52
                               B2  LAB   2 LTR FLASK CLIP
                                          ASSY                   1                    $      32.80  $     32.80
                               B2  LAB   8/4LT FLASK CLIP
                                          ASSY                   1                    $      52.48  $     52.48
                               B2  LAB   6 LTR FLASK CLIP
                                          ASSY                   1                    $      55.76  $     55.76
                                   SOFT  SALES TAX               1                    $     646.61  $    646.61
                                   SOFT  FREIGHT                 1                    $     320.00  $    320.00  $  9,049.35

 28   QIAGEN                   B2  LAB   CENTRIFUGE 4-15C
                                          CAT#8                  1                    $   8,795.00  $  8,795.00
                                   SOFT  SALES TAX               1                    $     704.00  $    704.00
                                   SOFT  FREIGHT                 1                    $     183.00  $    183.00  $  9,682.00

 39   AVAYA INC                B2  SOFT  TSO PRO SUPPORT         1                    $   2,500.00  $  2,500.00  $  2,500.00
                               B2  OFC   DEFINITY COMMUNICATION
                                          SYSTEM/NTWRK           1                    $  28,284.61  $ 28,284.61  $ 28,284.61
                               B2  OFC   CCC/TELSET
                                          COMMUNICATION SYSTEM   1                    $ 141,715.83  $141,715.83  $141,715.83

 40   OP CONTRACT              B2  FURN  KEYBOARD TRAY          12                    $     182.50  $  2,190.00
                               B2  SOFT  TAX                     1                    $     180.68  $    180.68  $  2,370.68
                               B2  FURN  POWER ADAPTER          17                    $      63.00  $  1,071.00
                               B2  FURN  DRAW ROD 34H           14                    $       6.43  $     90.02
                               B2  FURN  WALL START 80H BLACK   48                    $      17.14  $    822.72
                               B2  FURN  SERIES 2 FINISHED
                                          END 53H               43                    $      16.71  $    718.53
                               B2  FURN  SHELF                   2                    $      63.00  $    126.00
                               B2  FURN  FLIPPER UNIT           10                    $     180.00  $  1,800.00
                               B2  FURN  DEPOSIT CHECK#11011     1                    $ (2,505.05)  $ (2,505.05)
                                   SOFT  TAX                     1                    $     381.84  $    381.84  $  2,505.06

 41   PELCO SALES & SERVICE    B2  LAB   T-49 REFRIGERATOR       1     2730482        $   2,207.00  $  2,207.00
                               B2  LAB   T-23 FREEZER            1     2702014        $   2,073.00  $  2,073.00
                               B2  LAB   ICE MAKER               1    323175-02C      $   1,035.00  $  1,035.00
                                   SOFT  DELIVERY/INSTALLATION   1                    $     300.00  $    300.00
                                   SOFT  TAX 8 1/4%              1                    $     463.24  $    463.24  $  6,078.24

 42   FORMA SCIENTIFIC         B2  LAB   BRUSH SHELF KIT        30                    $      79.20  $  2,376.00
                               B2  SOFT  TAX                     1                    $     196.02  $    196.02  $  2,572.02
                               B2  LAB   LAB FRZER               1                    $   5,303.52  $  5,303.52
                               B2  LAB   INV RACK               10                    $     115.50  $  1,155.00
                                   SOFT  TAX                     1                    $     532.83  $    532.83  $  6,991.35
</TABLE>

<TABLE>
<CAPTION>
                                   Equip                             Vendor
Item#       Supplier          Loc: Code        Description           Total     PO #    Invoice #    Inv Date  Ck #      Ck Date
-----       --------          ---- -----       -----------         ----------  -----  ------------  --------  ----      -------
<S>   <C>                     <C>  <C>   <C>                       <C>         <C>    <C>           <C>       <C>       <C>
                               B2  LAB   CYLINDER 500 ML
                               B2  LAB   CYLINDER 250 ML
                               B2  LAB   CYLINDER 50 ML
                                   SOFT  TAX                      $  3,526.84  10204   6286410       1/25/01  100829    2/14/01

 23   THERMOFORMA              B2  FURN  BIO SAFE CABINET
                               B2  FURN  EXH TRAN AT/TMBL
                                          W/ 8" DAMP
                                   SOFT  TAX
                                   SOFT  FREIGHT                  $  9,118.71  62474   1006650       1/3/01   101322    3/15/01

 27   FORMA SCIENTIFIC         B2  LAB   CONSOLE INCUBATOR
                                          SHAKER
      (THERMOFORMA)            B2  LAB   UNIV PLATFORM
                               B2  LAB   1 LTR FLASK CLIP
                                          ASSY
                               B2  LAB   2 LTR FLASK CLIP
                                          ASSY
                               B2  LAB   8/4LT FLASK CLIP
                                          ASSY
                               B2  LAB   6 LTR FLASK CLIP
                                          ASSY
                                   SOFT  SALES TAX
                                   SOFT  FREIGHT                  $  9,049.35  10173   1021460       2/1/01   101109     3/7/01

 28   QIAGEN                   B2  LAB   CENTRIFUGE 4-15C
                                          CAT#8
                                   SOFT  SALES TAX
                                   SOFT  FREIGHT                  $  9,682.00  10126   90552918      2/9/01   100985    2/23/01

 39   AVAYA INC                B2  SOFT  TSO PRO SUPPORT                               211979304    10/26/00   11507    11/6/00
                               B2  OFC   DEFINITY COMMUNICATION
                                          SYSTEM/NTWRK                                212097214      11/1/00   11507    11/6/00
                               B2  OFC   CCC/TELSET
                                          COMMUNICATION SYSTEM    $172,500.44          212097223     11/1/00   11507    11/6/00

 40   OP CONTRACT              B2  FURN  KEYBOARD TRAY
                               B2  SOFT  TAX                                   61156     37447       8/25/00  100741     2/2/01
                               B2  FURN  POWER ADAPTER
                               B2  FURN  DRAW ROD 34H
                               B2  FURN  WALL START 80H BLACK
                               B2  FURN  SERIES 2 FINISHED
                                          END 53H
                               B2  FURN  SHELF
                               B2  FURN  FLIPPER UNIT
                               B2  FURN  DEPOSIT CHECK#11011
                                   SOFT  TAX                      $  4,875.74  60449     38980      10/25/00  100741     2/2/01

 41   PELCO SALES & SERVICE    B2  LAB   T-49 REFRIGERATOR
                               B2  LAB   T-23 FREEZER
                               B2  LAB   ICE MAKER
                                   SOFT  DELIVERY/INSTALLATION
                                   SOFT  TAX 8 1/4%               $  6,078.24  61778     10-020     10/19/00  11439     11/1/00

 42   FORMA SCIENTIFIC         B2  LAB   BRUSH SHELF KIT
                               B2  SOFT  TAX                                   62415    1006630      1/3/01   100541    1/22/01
                               B2  LAB   LAB FRZER
                               B2  LAB   INV RACK
                                   SOFT  TAX                      $  9,563.37  62389    1006640      1/3/01   100541    1/22/01
</TABLE>

<PAGE>   13

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                   Equip                                                 Unit          Ext.       Invoice
Item#       Supplier          Loc: Code        Description       QTY  Serial #           Price         Price       Total
-----       --------          ---- -----       -----------       ---  --------        ------------  -----------  ----------
<S>   <C>                     <C>  <C>   <C>                     <C>  <C>             <C>           <C>          <C>
                               B2                                       53695
                               B2                                       53696
 43   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PIII MOTHERBOARD
                                          (ICS SYSTEM)           3      53697          $  1,428.00  $ 4,284.00
                               B2                                        1683
                               B2                                        2085
                               B2  COMP  17" MONITOR             3       2086          $    199.00  $    597.00
                                   SOFT  FREIGHT                 1                     $    195.00  $    195.00  $  5,076.00

 44   VWR SCIENTIFIC           B2  LAB   CENTRFUG ROTR           2                     $  2,350.00  $  4,700.00
                                   SOFT  TAX                     1                     $    387.75  $    387.75  $  5,087.75

 45   FINELINE CARPENTRY       B2  FURN  CUSTOM RECEPTION DESK
                                          & CREDENZA             1                     $ 14,750.00  $ 14,750.00  $ 14,750.00
                               B2  FURN  CABINETS, PLASTIC
                                          LAMINATE COUNTERTOPS   1                     $ 21,930.00  $ 21,930.00
                               B2  FURN  32LF OF LIGHT SOFFIT    1                     $    800.00  $    800.00
                               B2  FURN  PLASTIC LAMINATE
                                          VANITY COUNTERTOPS     1                     $  3,000.00  $  3,000.00
                               B2  FURN  MILLWORK CHANGES
                                          IN BREAK ROOM          1                     $    700.00  $    700.00  $ 26,430.00

 46   IBS INTEGRA BIOSCIENCE   B2  LAB   AUTO PETRI DISH
                                          FILLER                 1                     $  6,350.00  $  6,350.00
                               B2  LAB   AUTO PETRI DISH
                                          FEEDER                 1                     $  5,650.00  $  5,650.00
                               B2  LAB   STACKING UNIT AUTO
                                          PETRI DISH             1                     $  5,950.00  $  5,950.00
                               B2  LAB   LETTERDANCER PRINTER    1                     $  6,500.00  $  6,500.00
                               B2  LAB   COLOR PRINT CASSETTE    1                     $     30.00  $     30.00
                               B2  LAB   ADDITIONAL STACKING
                                          TABLE                  1                     $    525.00  $    525.00
                               B2  LAB   ULTRAVIOLET LAMP        1                     $    105.00  $    105.00
                               B2  LAB   TUBING SET WITH
                                          FILLING NOZZLE         1                     $    145.00  $    145.00
                                   SOFT  SHIPPING AND
                                          HANDLING               1                     $    210.55  $    210.55
                                   SOFT  TAX & FREIGHT           1                     $  2,100.91  $  2,100.91  $ 27,566.46

 47   INTERMEC TECHNOLOGIES    B2  OFC   PRINTER                 1    28600000062      $  2,545.75  $  2,545.75
                               B2  OFC   INTERNAL ETHERNET ACC   2                     $    378.25  $    756.50
                                   SOFT  SHIPPING AND HANDLING   1                     $     21.46  $     21.46
                                   SOFT  TAX                     1                     $    274.20  $    274.20  $  3,597.91

 48   INTERMEC TECHNOLOGIES    B2  OFC   PRINTER                 1    29000000045      $  2,545.75  $  2,545.75
                                   SOFT  SHIPPING AND HANDLING   1                     $     17.23  $     17.23
                                   SOFT  TAX                     1                     $    211.45  $    211.45  $  2,774.43
                                   SOFT  LABEL STOCK             4                     $    127.71  $    510.84
                                   SOFT  SUPER RIBBON            3                     $     21.84  $     65.52
                                   SOFT  SHIPPING AND HANDLING   1                     $     15.24  $     15.24
                                   SOFT  TAX                     1                     $     47.56  $     47.56  $    639.16

 49   HEWLETT PACKARD          B2  COMP  OMNIBOOK XE3            1                     $  2,299.00  $  2,299.00
      BUSINESS STORE           B2  COMP  64 MB SDRAM
                                          PC-100 MODULE          1                     $    136.00  $    136.00
                               B2  COMP  17" COLOR MONITOR       1     MY02673143      $    245.00  $    245.00
                               B2  COMP  PORT REPLICATOR
                                          FOR XE3                1                     $    165.00  $    165.00
                                   SOFT  SHIPPING AND HANDLING   1                     $     15.09  $     15.09
                                   SOFT  TAX                     1                     $    234.71  $    234.71  $  3,094.80

                                                                                                    $343,489.42  $343,489.42
</TABLE>

<TABLE>
<CAPTION>
                                   Equip                            Vendor
Item#       Supplier          Loc: Code        Description           Total    PO #    Invoice #    Inv Date   Ck #     Ck Date
-----       --------          ---- -----       -----------        ----------- -----  ------------  --------  -------   --------
<S>   <C>                     <C>  <C>   <C>                      <C>         <C>    <C>           <C>       <C>       <C>
                               B2
                               B2
 43   ICS COMPUTER SYSTEMS     B2  COMP  INTEL PIII MOTHERBOARD
                                          (ICS SYSTEM)
                               B2
                               B2
                               B2  COMP  17" MONITOR
                                   SOFT  FREIGHT                  $  5,076.00  10411     44883       2/28/01  101261    3/15/01

 44   VWR SCIENTIFIC           B2  LAB   CENTRFUG ROTR
                                   SOFT  TAX                      $  5,087.75  62472    5946077     12/14/00  100369     1/5/01

 45   FINELINE CARPENTRY       B2  FURN  CUSTOM RECEPTION DESK
                                          & CREDENZA                           61109     10015      10/19/00
                               B2  FURN  CABINETS, PLASTIC
                                          LAMINATE COUNTERTOPS
                               B2  FURN  32LF OF LIGHT SOFFIT
                               B2  FURN  PLASTIC LAMINATE
                                          VANITY COUNTERTOPS
                               B2  FURN  MILLWORK CHANGES
                                          IN BREAK ROOM           $ 41,180.00  61101     10016      10/19/00   11474    11/6/00

 46   IBS INTEGRA BIOSCIENCE   B2  LAB   AUTO PETRI DISH
                                          FILLER
                               B2  LAB   AUTO PETRI DISH
                                          FEEDER
                               B2  LAB   STACKING UNIT AUTO
                                          PETRI DISH
                               B2  LAB   LETTERDANCER PRINTER
                               B2  LAB   COLOR PRINT CASSETTE
                               B2  LAB   ADDITIONAL STACKING
                                          TABLE
                               B2  LAB   ULTRAVIOLET LAMP
                               B2  LAB   TUBING SET WITH
                                          FILLING NOZZLE
                                   SOFT  SHIPPING AND
                                          HANDLING
                                   SOFT  TAX & FREIGHT            $ 27,566.46  61661      4589      11/30/00  100077   12/18/00

 47   INTERMEC TECHNOLOGIES    B2  OFC   PRINTER
                               B2  OFC   INTERNAL ETHERNET ACC
                                   SOFT  SHIPPING AND HANDLING
                                   SOFT  TAX                      $  3,597.91  61918   6090322281   10/18/00   11827   11/27/00

 48   INTERMEC TECHNOLOGIES    B2  OFC   PRINTER
                                   SOFT  SHIPPING AND HANDLING
                                   SOFT  TAX                                   61918   6090323027   10/20/00   11482    11/6/00
                                   SOFT  LABEL STOCK
                                   SOFT  SUPER RIBBON
                                   SOFT  SHIPPING AND HANDLING
                                   SOFT  TAX                      $ 3,413.59   61617     609934      10/6/00   11482    11/6/00

 49   HEWLETT PACKARD          B2  COMP  OMNIBOOK XE3
      BUSINESS STORE           B2  COMP  64 MB SDRAM
                                          PC-100 MODULE
                               B2  COMP  17" COLOR MONITOR
                               B2  COMP  PORT REPLICATOR
                                          FOR XE3
                                   SOFT  SHIPPING AND HANDLING
                                   SOFT  TAX                      $  3,094.80  62081     1174736    10/31/00   11825   11/27/00

                                                                  $343,489.42
</TABLE>

<PAGE>   14

                                VIROLOGIC, INC.
                                   EXHIBIT A

VIROLOGIC, INC.
EQUIPMENT LOCATION:         B1   270 E. GRAND AVE

<TABLE>
<CAPTION>
                                   Equip                                                 Unit          Ext.       Invoice
Item#       Supplier          Loc: Code        Description       QTY  Serial #           Price         Price       Total
-----       --------          ---- -----       -----------       ---  --------        ------------ -----------   ----------
<S>   <C>                     <C>  <C>   <C>                     <C>  <C>             <C>          <C>           <C>

                                         FUNDING TOTAL                                              $697,741.15  $697,741.15
</TABLE>

<TABLE>
<CAPTION>
                                   Equip                            Vendor
Item#       Supplier          Loc: Code        Description           Total    PO #    Invoice #    Inv Date   Ck #     Ck Date
-----       --------          ---- -----       -----------        ----------- -----  ------------  --------  -------   --------
<S>   <C>                     <C>  <C>   <C>                      <C>         <C>    <C>           <C>       <C>       <C>
                                         FUNDING TOTAL            $697,741.15
</TABLE>

                              Equipment Code List

                            COMP = Computer Hardware

                                FURN = Furniture

                              LAB = Lab Equipment

                             MANUF = Manufacturing

                             OFC = Office Equipment

                        OTHER = Other than listed above

                            SOFT = Computer Software

                                TEL = Telephone

                        TEST = Electronic Test Equipment

                            TI = Tenant Improvements

<TABLE>
<CAPTION>
EQUIPMENT         TOTAL FOR
  CODE            CATEGORY           % OF TOTAL
---------        -----------         ----------
<S>              <C>                 <C>
LAB              $ 81,629.86             12%

COMP             $335,067.58             48%

SOFT             $ 44,518.55              6%

OFC              $183,275.44             26%

FURN             $ 53,249.72              8%

TOTAL            $697,741.15            100%
</TABLE>

--------------------------------------------------------------------------------
LESSEE:  ViroLogic, Inc.                                   WILLIAM D. YOUNG, CEO

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00028-of-00352.parquet"}]]