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ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT

Loan Agreement

ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT | Document Parties: RUTLAND TOOL & SUPPLY CO INC | AIRGAS CANADA INC | AIRGAS CARBONIC, INC | AIRGAS GASPRO, INC | AIRGAS INTERNATIONAL, INC | AIRGAS SPECIALTY GASES, INC | AIRGAS WEST, SA DE CV | AIRGAS-EAST, INC | AIRGAS-GREAT LAKES, INC | AIRGAS-INTERMOUNTAIN, INC | AIRGAS-MID AMERICA, INC | AIRGAS-NORPAC, INC | AIRGAS-NORTH CENTRAL, INC | AIRGAS-SOUTHWEST, INC | AIRGAS-WEST, INC | BANC OF AMERICA SECURITIES LLC | BANK OF AMERICA, N.A. | BANK OF HAWAII | BANK OF NEW YORK | BANK OF NOVA SCOTIA | BANK OF OKLAHOMA, N.A. | BANK OF TOKYO-MITSUBISHI TRUST COMPANY | BRANCH BANKING AND TRUST COMPANY | JP MORGAN SECURITIES INC | JPMORGAN CHASE BANK, NA | KEY BANK, NATIONAL ASSOCIATION | MELLON BANK, NA | MERRILL LYNCH BUSINESS FINANCIAL | MIZUHO CORPORATE BANK, LTD | NITROUS OXIDE CORP | PNC BANK, NATIONAL ASSOCIATION | RED-D-ARC LIMITED | RUTLAND TOOL & SUPPLY CO, INC | SUMITOMO MITSUI BANKING CORPORATION | WACHOVIA BANK, NATIONAL ASSOCIATION You are currently viewing:
This Loan Agreement involves

RUTLAND TOOL & SUPPLY CO INC | AIRGAS CANADA INC | AIRGAS CARBONIC, INC | AIRGAS GASPRO, INC | AIRGAS INTERNATIONAL, INC | AIRGAS SPECIALTY GASES, INC | AIRGAS WEST, SA DE CV | AIRGAS-EAST, INC | AIRGAS-GREAT LAKES, INC | AIRGAS-INTERMOUNTAIN, INC | AIRGAS-MID AMERICA, INC | AIRGAS-NORPAC, INC | AIRGAS-NORTH CENTRAL, INC | AIRGAS-SOUTHWEST, INC | AIRGAS-WEST, INC | BANC OF AMERICA SECURITIES LLC | BANK OF AMERICA, N.A. | BANK OF HAWAII | BANK OF NEW YORK | BANK OF NOVA SCOTIA | BANK OF OKLAHOMA, N.A. | BANK OF TOKYO-MITSUBISHI TRUST COMPANY | BRANCH BANKING AND TRUST COMPANY | JP MORGAN SECURITIES INC | JPMORGAN CHASE BANK, NA | KEY BANK, NATIONAL ASSOCIATION | MELLON BANK, NA | MERRILL LYNCH BUSINESS FINANCIAL | MIZUHO CORPORATE BANK, LTD | NITROUS OXIDE CORP | PNC BANK, NATIONAL ASSOCIATION | RED-D-ARC LIMITED | RUTLAND TOOL & SUPPLY CO, INC | SUMITOMO MITSUI BANKING CORPORATION | WACHOVIA BANK, NATIONAL ASSOCIATION

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Title: ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT
Governing Law: New York     Date: 2/8/2005
Law Firm: Moore Van    

ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT, Parties: rutland tool & supply co inc , airgas canada inc , airgas carbonic  inc , airgas gaspro  inc , airgas international  inc , airgas specialty gases  inc , airgas west  sa de cv , airgas-east  inc , airgas-great lakes  inc , airgas-intermountain  inc , airgas-mid america  inc , airgas-norpac  inc , airgas-north central  inc , airgas-southwest  inc , airgas-west  inc , banc of america securities llc , bank of america  n.a. , bank of hawaii , bank of new york , bank of nova scotia , bank of oklahoma  n.a. , bank of tokyo-mitsubishi trust company , branch banking and trust company , jp morgan securities inc , jpmorgan chase bank  na , key bank  national association , mellon bank  na , merrill lynch business financial , mizuho corporate bank  ltd , nitrous oxide corp , pnc bank  national association , red-d-arc limited , rutland tool & supply co  inc , sumitomo mitsui banking corporation , wachovia bank  national association
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<PAGE>

EXHIBIT 4.1

                          ELEVENTH AMENDED AND RESTATED
                                CREDIT AGREEMENT

                          Dated as of January 14, 2005

                                      among

                                   AIRGAS, INC.,
                    AIRGAS CANADA INC. and RED-D-ARC LIMITED,
                                  as Borrowers

                      CERTAIN SUBSIDIARIES OF AIRGAS, INC.
                         FROM TIME TO TIME PARTY HERETO,
                                   as Guarantors

                               THE SEVERAL LENDERS
                         FROM TIME TO TIME PARTY HERETO,

                             BANK OF AMERICA, N.A.,
                                  as U.S. Agent

                                        and

                            THE BANK OF NOVA SCOTIA,
                                as Canadian Agent

                            JPMORGAN CHASE BANK, N.A.
                                       and
                               THE BANK OF NEW YORK,
                            as Co-Syndication Agents,

                     BANK OF TOKYO-MITSUBISHI TRUST COMPANY
                                       and
                         PNC BANK, NATIONAL ASSOCIATION,
                            as Co-Documentation Agents,

                         BANC OF AMERICA SECURITIES LLC
                                       and
                          J.P. MORGAN SECURITIES INC.,
                  as Joint Lead Arrangers and Co-Book Managers,

                                       and

                              THE BANK OF NEW YORK,
                             as Joint Lead Arranger

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                               <C>
ARTICLE I   DEFINITIONS........................................................................    1
         1.1       Definitions.................................................................    1
         1.2       Computation of Time Periods.................................................   27
         1.3       Accounting Terms............................................................   27

ARTICLE II   U.S. DOLLAR CREDIT FACILITIES.....................................................   27
         2.1       U.S. Revolving Loans........................................................   27
         2.2       Competitive U.S. Loan Subfacility...........................................   29
          2.3       U.S. Letter of Credit Subfacility...........................................   31
         2.4       U.S. Swingline Loan Subfacility.............................................   35
         2.5       U.S. Term Loan..............................................................   37

ARTICLE III   CANADIAN DOLLAR CREDIT FACILITIES................................................   39
         3.1       Canadian Revolving Loans....................................................   39
         3.2        Canadian Swingline Loan Subfacility.........................................   40
         3.3       Canadian Letter of Credit Subfacility.......................................   41
         3.4       Bankers' Acceptances........................................................   45
         3.5       Removal of a Canadian Borrower..............................................   47
         3.6       Reset Mechanism.............................................................   48
         3.7       Certain Waivers.............................................................   48

ARTICLE IV   OTHER PROVISIONS RELATING TO CREDIT FACILITIES....................................   48
         4.1       Default Rate................................................................   48
         4.2       Extension and Conversion....................................................   48
         4.3       Prepayments.................................................................   49
         4.4       Termination and Reduction of Commitments; Increase of Commitments...........   51
         4.5       Fees........................................................................   53
         4.6       Capital Adequacy............................................................   55
         4.7       Inability To Determine Interest Rate........................................   55
         4.8       Illegality..................................................................   56
         4.9       Requirements of Law.........................................................   56
         4.10      Taxes.......................................................................   57
         4.11      Indemnity...................................................................   58
         4.12      Payments Generally; Agents' Clawback........................................   59
         4.13      Sharing of Payments.........................................................   61
         4.14      Computations; Allocation of Payments Post-Acceleration......................   61

ARTICLE V   CONDITIONS.........................................................................   63
         5.1       Closing Conditions..........................................................   63
         5.2       Conditions to all Extensions of Credit......................................   64

ARTICLE VI   REPRESENTATIONS AND WARRANTIES....................................................   65
         6.1       Financial Condition.........................................................   65
         6.2       No Change...................................................................   66
         6.3       Organization; Existence; Compliance with Law................................   66
         6.4       Power; Authorization; Enforceable Obligations...............................   66
         6.5       No Legal Bar................................................................   66
         6.6       No Material Litigation......................................................   67
         6.7        No Default..................................................................   67
         6.8       Ownership of Property; Liens................................................   67
         6.9       Intellectual Property.......................................................   67
         6.10      No Burdensome Restrictions..................................................   67
         6.11      Taxes.......................................................................   67
         6.12      ERISA.......................................................................   68
</TABLE>

                                       i

<PAGE>

<TABLE>
<S>                                                                                              <C>
         6.13      Governmental Regulations, Etc...............................................   68
         6.14      Subsidiaries................................................................   69
         6.15      Purpose of Loans and Letters of Credit......................................   69
         6.16      Environmental Matters.......................................................   70
         6.17      Solvency....................................................................   70
         6.18      Perfection of Security Interests in the Collateral..........................   71
         6.19      Perfection Information......................................................   71

ARTICLE VII   AFFIRMATIVE COVENANTS............................................................   71
         7.1       Information Covenants.......................................................   71
         7.2       Preservation of Existence and Franchises....................................   73
         7.3       Books and Records...........................................................   73
         7.4       Compliance with Law.........................................................   73
         7.5       Payment of Taxes and Other Indebtedness.....................................   73
         7.6        Insurance...................................................................   74
         7.7       Maintenance of Property.....................................................   74
         7.8       Use of Proceeds.............................................................   74
         7.9       Audits/Inspections..........................................................   74
         7.10      Financial Covenants.........................................................   74
         7.11      Maintenance of Designation Rights - National Welders Board of Directors.....   74
         7.12      Additional Guarantors.......................................................   74
         7.13      Pledged Assets..............................................................   75
         7.14      Receivables Financing Further Assurances....................................   76

ARTICLE VIII   NEGATIVE COVENANTS..............................................................   76
         8.1       Indebtedness................................................................   76
         8.2       Liens.......................................................................   77
         8.3       Nature of Business..........................................................   77
          8.4       Consolidation, Merger, Amalgamation or Sale.................................   77
         8.5       Investments.................................................................   78
         8.6       Restricted Payments.........................................................   79
         8.7       Payments of Indebtedness, Etc...............................................   80
         8.8       Fiscal Year; Organizational Documents.......................................   80
         8.9       Limitation on Restricted Actions............................................   81
         8.10      Issuance and Sale of Subsidiary Stock.......................................   81
         8.11      No Further Negative Pledges.................................................   81
         8.12      Transactions with Affiliates................................................   81

ARTICLE IX   EVENTS OF DEFAULT.................................................................   82
         9.1       Events of Default...........................................................   82
         9.2       Acceleration; Remedies......................................................   84

ARTICLE X   AGENCY PROVISIONS..................................................................   85
         10.1      Appointment and Authority...................................................   85
         10.2      Rights as a Lender..........................................................   86
         10.3      Exculpatory Provisions......................................................   86
         10.4      Reliance by the Agents......................................................   87
         10.5      Delegation of Duties........................................................   87
         10.6       Resignation of Agents.......................................................   87
         10.7      Non-Reliance on Agents and Other Lenders....................................   88
         10.8      No Other Duties; Etc........................................................   88
         10.9      U.S. Agent May File Proofs of Claim.........................................   89
         10.10     Collateral and Guaranty Matters.............................................   89

ARTICLE XI   MISCELLANEOUS.....................................................................   90
         11.1      Notices and Other Communications; Facsimile Copies..........................   90
</TABLE>

                                       ii

<PAGE>

<TABLE>
<S>                                                                                               <C>
         11.2      Right of Set-Off............................................................    91
         11.3      Benefit of Agreement........................................................    91
         11.4      No Waiver; Remedies Cumulative..............................................    94
         11.5      Payment of Expenses, Etc....................................................    94
         11.6      Amendments, Waivers and Consents............................................    96
         11.7      Counterparts................................................................    97
         11.8      Headings....................................................................    97
         11.9      Survival....................................................................    97
         11.10     Governing Law; Submission to Jurisdiction; Venue............................    97
         11.11     Severability................................................................    99
         11.12     Entirety....................................................................    99
         11.13     Binding Effect; Termination.................................................    99
         11.14     Confidentiality.............................................................   100
         11.15     Conflict....................................................................   100
         11.16     USA PATRIOT Act Notice......................................................   100
         11.17     Replacement of Lenders......................................................   101
         11.18     Designation as Senior Debt..................................................   101

ARTICLE XII   GUARANTY.........................................................................   101
         12.1      The Guaranty................................................................   101
         12.2      Obligations Unconditional...................................................   102
         12.3      Reinstatement...............................................................   103
         12.4      Certain Additional Waivers..................................................   104
         12.5      Remedies....................................................................   104
         12.6      Rights of Contribution......................................................   104
         12.7      Guarantee of Payment; Continuing Guarantee..................................   104
         12.8      Collateral and Guarantor Release Date.......................................   104
</TABLE>

                                      iii

<PAGE>

                             SCHEDULES AND EXHIBITS
<TABLE>
<CAPTION>
      Schedules
------------------
<S>                         <C>
Schedule 1.1A               Excluded Asset Dispositions
Schedule 1.1B               Existing Canadian Letters of Credit
Schedule 1.1C               Existing U.S. Letters of Credit
Schedule 1.1D                National Welder Liens
Schedule 1.1E               Liens
Schedule 2.1(a)             Lenders and Commitments
Schedule 5.1(d)             Legal Opinions
Schedule 6.14               Subsidiaries
Schedule 6.19               Perfection Information
Schedule 8.1                Indebtedness
Schedule 8.5                Investments
Schedule 11.1               Certain Notices
</TABLE>

<TABLE>
<CAPTION>
      Exhibits
------------------
<S>                         <C>
Exhibit   2.1(b)(i)          Form of Notice of U.S. Borrowing
Exhibit 3.1(b)(i)           Form of Notice of Canadian Borrowing
Exhibit 4.2                 Form of Notice of Extension/Conversion
Exhibit 4.4                 Form of New Commitment Agreement
Exhibit 7.1(c)              Form of Officer's Compliance Certificate
Exhibit 7.12                Form of Joinder Agreement
Exhibit 11.3                Form of Assignment and Assumption
</TABLE>

                                       iv

<PAGE>

                 ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT

       THIS ELEVENTH AMENDED AND RESTATED CREDIT AGREEMENT, dated as of January
14, 2005 (the "Credit Agreement"), is by and among AIRGAS, INC., a Delaware
corporation ("Airgas" and also a "Borrower"), AIRGAS CANADA INC., a Canada
corporation, and RED-D-ARC LIMITED, an Ontario corporation, (each a "Canadian
Borrower" and together with Airgas, the "Borrowers"), the Guarantors from time
to time party hereto, the several lenders identified on the signature pages
hereto as Lenders and such other lenders as may from time to time become a party
hereto as Lenders (the "Lenders"), BANK OF AMERICA, N.A., as administrative
agent for the Lenders (in such capacity, the "U.S. Agent") and THE BANK OF NOVA
SCOTIA, as Canadian administrative agent for the Lenders (in such capacity, the
"Canadian Agent").

                               W I T N E S S E T H

      WHEREAS, Airgas, the Canadian Borrowers and the Guarantors are parties to
a Tenth Amended and Restated Credit Agreement dated as of July 30, 2001 (as
amended, supplemented or otherwise modified from time to time until (but not
including) the date of this Credit Agreement, the "Existing Credit Agreement")
with the banks, financial institutions and other institutional lenders party
thereto, Bank of America, N.A., as United States administrative agent for such
lenders, and Canadian Imperial Bank of Commerce, as Canadian administrative
agent for such lenders.

      WHEREAS, the parties to this Credit Agreement desire to amend the Existing
Credit Agreement as set forth herein and to restate the Existing Credit
Agreement in its entirety to read as follows.

      WHEREAS, the Credit Parties have requested that the (i) U.S. Revolving
Lenders agree to extend credit to Airgas in an aggregate principal amount of up
to $308,000,000, (ii) U.S. Term Lenders agree to extend credit to Airgas in an
aggregate principal amount of up to $100,000,000 and (iii) Canadian Lenders
agree to extend credit to the Canadian Borrowers in an aggregate principal
amount of up to C$50,000,000, each for the purposes set forth in this Credit
Agreement. The Lenders have indicated their willingness to agree to extend
credit to Airgas and the Canadian Borrowers from time to time in such amount on
the terms and conditions of this Credit Agreement

      NOW, THEREFORE, IN CONSIDERATION of the premises and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto agree as follows:

                                    ARTICLE I

                                    DEFINITIONS

      1.1    DEFINITIONS.

      As used in this Credit Agreement, the following terms shall have the
meanings specified below unless the context otherwise requires:

         "Acceptance Fee" means an amount equal to the product of (a) the
Applicable Percentage for Bankers' Acceptances as of the date of acceptance; (b)
the aggregate Face Amount of Bankers' Acceptances accepted by a Canadian Lender
on the date of acceptance of the requested Bankers' Acceptances; and (c) a

                                        1

<PAGE>

fraction (i) the numerator of which is the term to maturity in days of such
Bankers' Acceptances, and (ii) the denominator of which is 365 days.

      "Acquisition", by any Consolidated Party, means the acquisition (whether
or not involving a merger or consolidation) by such Consolidated Party, of (i)
to the extent not constituting a Consolidated Capital Expenditure, all or a
majority of the Capital Stock or all or substantially all of the Property or a
line of business or division of another Person or (ii) all of the remaining
Capital Stock of National Welders not then owned by Airgas and/or its Restricted
Subsidiaries.

      "Additional Commitment" means, with respect to any Person which executes a
New Commitment Agreement in accordance with Section 4.4(b), the commitment of
such Lender in an aggregate principal amount up to the amount specified in such
New Commitment Agreement (i) to (A) make U.S. Revolving Loans in accordance with
the provisions of Section 2.1(a), (B) purchase participation interests in U.S.
Letters of Credit in accordance with the provisions of Section 2.3(c), and (C)
purchase participation interests in the U.S. Swingline Loans in accordance with
the provisions of Section 2.4(b)(iii), and/or (ii) to make U.S. Term Loans in
accordance with the provisions of Section 2.5(a).

      "Administrative Questionnaire" means an Administrative Questionnaire in a
form supplied by the U.S. Agent or the Canadian Agent, as applicable.

      "Affiliate" means, with respect to any Person, any other Person (i)
directly or indirectly controlling or controlled by or under direct or indirect
common control with such Person or (ii) directly or indirectly owning or holding
ten percent (10%) or more of the equity interest in such Person. For purposes of
this definition, "control" when used with respect to any Person means the power
to direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

      "Agents" means the U.S. Agent and the Canadian Agent.

      "Airgas" shall have the meaning assigned to such term in the heading
hereof, together with any successors or assigns.

                                       2

<PAGE>

      "Applicable Percentage" means, for purposes of calculating the applicable
rate for any day for any U.S. Base Rate Loan, any Eurodollar Loan or any
Canadian Base Rate Loan, the Acceptance Fee, the U.S. Unused Fee, the Canadian
Unused Fee, the issuance fee for standby U.S. Letters of Credit, the drawing fee
for trade U.S. Letters of Credit, the issuance fee for standby Canadian Letters
of Credit, the drawing fee for trade Canadian Letters of Credit, the appropriate
applicable percentage, corresponding to the higher of the long term credit
ratings of Airgas by S&P and Moody's in effect as of such date:

<TABLE>
<CAPTION>
                                                   Applicable Percentages
----------------------------------------------------------------------------------------------------------------------------------
                           U.S. Revolving Loans
                           and U.S. Term Loans                                                   
                          ---------------------                                Issuance Fees for
                                                                                standby U.S.        Drawing Fees for
                                          U.S.                                  Letters of Credit    trade U.S. Letters    U.S. Unused
             Long term                    Base        Canadian                       and standby          of Credit and       Fee and
Pricing        credit       Eurodollar      Rate       Base Rate      Bankers'      Canadian Letters       trade Canadian        Canadian
  Level         rating          Loans        Loans       Loans       Acceptances         of Credit        Letters of Credit     Unused Fee
--------      ---------     ----------    --------     ---------    ----------      ------------------   ------------------    -----------
<S>           <C>           <C>           <C>          <C>          <C>             <C>                  <C>                   <C>
I              BBB/Baa2        0.700%        0.00%        0.00%         0.700%            0.700%                 0.350%             0.150%
             or higher
             BBB-
II            /Baa3           0.825%        0.00%        0.00%         0.825%            0.825%                0.4125%             0.175%
III           BB+/Ba1         0.950%        0.00%        0.00%         0.950%            0.950%                 0.475%             0.200%
IV            BB/Ba2          1.350%       0.350%       0.350%         1.350%            1.350%                 0.675%             0.275%
V             BB-/Ba3         1.750%       0.750%       0.750%         1.750%            1.750%                0.8750%             0.375%
             or lower
</TABLE>

      In the event that the long term credit ratings of Airgas by S&P and
Moody's for any day differ by more than one Pricing Level, the Applicable
Percentage for such day shall be the appropriate applicable percentage
corresponding to the Pricing Level which is one Pricing Level higher (with
Pricing Level I begin the highest and Pricing Level V being the lowest) than the
Pricing Level corresponding to the lower of the long term credit ratings of
Airgas by S&P and Moody's in effect as of such date.

      "Application Period" means, in respect of any Asset Disposition, the
period of 360 days (or such shorter period as provided for reinvestment of the
proceeds thereof under any Junior Financing Documentation) following the
consummation of such Asset Disposition.

      "Approved Fund" means any Fund that is administered or managed by (i) a
Lender, (ii) an Affiliate of a Lender or (iii) an entity or an Affiliate of an
entity that administers or manages a Lender.

      "Asset Disposition" means any disposition (including pursuant to an Asset
Exchange or a Sale and Leaseback Transaction and including any Involuntary
Disposition) of any or all of the Property (including without limitation the
Capital Stock of a Subsidiary) of any Consolidated Party whether by sale, lease,
licensing, transfer or otherwise; provided, however, that (i) the term "Asset
Disposition" shall be deemed to include any "Asset Sale" (or any comparable
term) under, and as defined in, any Junior Financing Documentation, and (ii) an
issuance of Capital Stock shall not constitute an Asset Disposition.

      "Asset Disposition Prepayment Event" means, without duplication, (i) with
respect to any Asset Disposition (other than an Excluded Asset Disposition)
occurring on any date, if any, on which the Applicable Percentage is based on
"Pricing Level IV" or "Pricing Level V", the failure of the Credit Parties to
apply (or cause to be applied) the Net Cash Proceeds of such Asset Disposition
to Eligible Reinvestments during the Application Period for such Asset
Disposition and (ii) as long as the U.S. Term Loan is outstanding, the date five
(5) Business Days prior to the date on which a failure of the Credit

                                       3

<PAGE>

Parties to have applied the Net Cash Proceeds from any "Asset Sale" (or any
comparable term) under, and as defined in, any Junior Financing Documentation in
such a manner as to not create an obligation of Airgas to offer to purchase any
Subordinated Debt with any such Net Cash Proceeds.

      "Asset Exchange" means, in connection with any Asset Disposition by a
Consolidated Party, any substantially contemporaneous exchange of Property of
such Consolidated Party for Property (that would otherwise constitute an
Eligible Reinvestment) of the other party to such Asset Disposition.

      "Attributed Principal Amount" means, on any day, with respect to any
Securitization Transaction, the aggregate amount (with respect to such
transaction, the "Invested Amount") paid to, or borrowed by, such Person as of
such date under the Securitization Transaction, minus the aggregate amount
received by the applicable purchaser of the related Securitization Assets
(including, with respect to the Permitted Receivables Financing, the Receivables
Financier) and applied to the reduction of the Invested Amount under such
Securitization Transaction.

      "BA Outstandings" means, at any time, the sum of the Face Amount of all
Bankers' Acceptances outstanding at such time.

      "Bankers' Acceptance" means a draft (a) drawn by a Canadian Borrower under
the Canadian Revolving Commitment for acceptance by a Canadian Lender, (b)
denominated in Canadian Dollars and (c) issued and payable only in Canada.

      "Bank of America" means Bank of America, N.A. and its successors.

      "Bankruptcy Code" means the Bankruptcy Code in Title 11 of the United
States Code or the Bankruptcy and Insolvency Act of Canada, in any case, as
amended, modified, succeeded or replaced from time to time.

      "Bankruptcy Event" means, with respect to any Person, the occurrence of
any of the following with respect to such Person: (i) a court or governmental
agency having jurisdiction in the premises shall enter a decree or order for
relief in respect of such Person in an involuntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, or
ordering the winding up or liquidation of its affairs; or (ii) a court or
governmental agency having jurisdiction in the premises shall enter a decree or
order appointing a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of such Person or for any substantial part of
its Property and such decree or order shall remain undismissed for a period of
sixty (60) consecutive days; or (iii) there shall be commenced against such
Person an involuntary case under any applicable bankruptcy, insolvency or other
similar law now or hereafter in effect, or any case, proceeding or other action
for the appointment of a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of such Person or for any substantial part of
its Property or for the winding up or liquidation of its affairs, and such
involuntary case or other case, proceeding or other action shall remain
undismissed, undischarged or unbonded for a period of sixty (60) consecutive
days; or (iv) such Person shall commence a voluntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, or
consent to the entry of an order for relief in an involuntary case under any
such law, or consent to the appointment or taking possession by a receiver,
liquidator, assignee, custodian, trustee, sequestrator (or similar official) of
such Person or for any substantial part of its Property or make any general
assignment for the benefit of creditors; or (v) such Person shall be unable to,
or shall admit in writing its inability to, pay its debts generally as they
become due.

      "BNS" means The Bank of Nova Scotia and its successors.

      "Borrowers" means a collective reference to each of Airgas and the
Canadian Borrowers.

                                       4

<PAGE>

      "Business Day" means a day other than a Saturday, Sunday or other day on
which commercial banks in Charlotte, North Carolina are authorized or required
by law to close, except that, (a) when used in connection with a Eurodollar
Loan, such day shall also be a day on which dealings between banks are carried
on in U.S. Dollar deposits in London, England, Charlotte, North Carolina and New
York, New York and (b) when used in connection with a Loan made by any of the
Canadian Lenders, the term Business Day shall not include any day on which
banking institutions in Toronto, Ontario are authorized by law or other
governmental actions to close.

      "Canadian Agent" shall have the meaning assigned to such term in the
heading hereof, together with any successors or assigns.

      "Canadian Agent's Fee Letter" means that certain letter agreement, dated
as of the Closing Date, between the Canadian Agent and Airgas, as amended,
modified, restated or supplemented from time to time.

      "Canadian Base Rate" means, for any day, the rate per annum (rounded
upwards, if necessary, to the nearest whole multiple of 1/100 of 1%) equal to
the higher of (i) the fluctuating rate of interest per annum equal to the rate
of interest established and publicly announced by BNS, from time to time, as its
prime rate for Canadian Dollar commercial loans made in Canada (with each change
in such prime rate being effective on the date such change is publicly announced
as effective (it being understood and agreed that the such prime rate is a
reference rate used by BNS in determining interest rates on certain loans and is
not intended to be the lowest rate of interest charged on any extension of
credit by BNS to any debtor)) and (ii) CDOR for such day plus the Applicable
Percentage for Bankers' Acceptances.

      "Canadian Base Rate Loan" means any Loan bearing interest at a rate
determined by reference to the Canadian Base Rate.

      "Canadian Borrowers" shall have the meaning assigned to such term in the
heading hereof, together with any successors or assigns.

      "Canadian Commitment Percentage" means, for any Canadian Lender, the
percentage identified as its Canadian Commitment Percentage on Schedule 2.1(a),
as such percentage may be modified in connection with any assignment made in
accordance with the provisions of Section 11.3; provided, however, at any time
that any Canadian Swingline Loan is outstanding (except to the extent that the
Canadian Swingline Lender has demanded repayment of a particular Canadian
Swingline Loan by way of a Canadian Revolving Loan as provided in Section
3.2(b)), (i) the Canadian Commitment Percentage of the Canadian Swingline Lender
shall be reduced by an amount equal to the percentage amount of the Canadian
Revolving Committed Amount then comprised of outstanding Canadian Swingline
Loans and (ii) the Canadian Commitment Percentage of each other Canadian Lender
shall be increased by an amount equal to the product of (A) the amount
determined pursuant to clause (i) above multiplied by (B) the fraction
determined from the ratio that the Canadian Commitment Percentage of such
Canadian Lender bears to the total Canadian Commitment Percentages of all the
Canadian Lenders other than the Canadian Swingline Lender.

      "Canadian Credit Parties" means a collective reference to the Canadian
Borrowers and the Canadian Subsidiary Guarantors, and "Canadian Credit Party"
means any one of them.

      "Canadian Dollars" means and "C$" means dollars in lawful currency of
Canada.

      "Canadian Guarantors" means collectively, Airgas, the U.S. Subsidiary
Guarantors and the Canadian Subsidiary Guarantors, and "Canadian Guarantor"
means any one of them.

                                        5

<PAGE>

      "Canadian Issuing Lender" means BNS.

      "Canadian Lenders" means those Lenders that have Canadian Revolving
Commitments and are identified as Lenders on the signature pages attached
hereto, together with their successors and assigns.

      "Canadian Letter of Credit" means (i) any standby or trade letter of
credit issued by the Canadian Issuing Lender for the account of a Canadian
Borrower in accordance with the terms of Section 3.3 and (ii) any Existing
Canadian Letter of Credit.

       "Canadian LOC Commitment" means the commitment of the Canadian Issuing
Lender to issue Canadian Letters of Credit in an aggregate face amount at any
time outstanding (together with the amounts of any unreimbursed drawings
thereon) of up to the Canadian LOC Committed Amount.

      "Canadian LOC Committed Amount" shall have the meaning assigned to such
term in Section 3.3.

      "Canadian LOC Documents" means, with respect to any Canadian Letter of
Credit, such Canadian Letter of Credit, any amendments thereto, any documents
delivered in connection therewith, any application therefor, and any agreements,
instruments, guarantees or other documents (whether general in application or
applicable only to such Canadian Letter of Credit) governing or providing for
(i) the rights and obligations of the parties concerned or at risk or (ii) any
collateral security for such obligations.

      "Canadian LOC Obligations" means, at any time, the sum of (i) the maximum
amount which is, or at any time thereafter may become, available to be drawn
under Canadian Letters of Credit then outstanding, assuming compliance with all
requirements for drawings referred to in such Canadian Letters of Credit plus
(ii) the aggregate amount of all drawings under Canadian Letters of Credit
honored by the Canadian Issuing Lender but not theretofore reimbursed. For all
purposes of this Agreement, if on any date of determination a Canadian Letter of
Credit has expired by its terms but any amount may still be drawn thereunder by
reason of the operation of Rule 3.14 of the ISP, such Letter of Credit shall be
deemed to be "outstanding" in the amount so remaining available to be drawn.

      "Canadian Obligations" means without duplication, (i) all of the
obligations of the Canadian Borrowers and the Canadian Guarantors, in their
capacity as such, to the Canadian Lenders, the Agents and the Collateral Agent,
whenever arising, under this Credit Agreement or any of the other Credit
Documents (including, but not limited to, any interest owed with respect to such
obligations which has accrued after the occurrence of a Bankruptcy Event with
respect to any Canadian Credit Party, regardless of whether such interest is an
allowed claim under the Bankruptcy Code) and (ii) all liabilities and
obligations, whenever arising, owing from the Canadian Borrowers to any Canadian
Lender, or any affiliate of a Canadian Lender, arising under any Hedging
Agreement.

      "Canadian Revolving Commitment" means, with respect to each Canadian
Lender, the commitment of such Canadian Lender in an aggregate principal amount
at any time outstanding of up to such Canadian Lender's Canadian Commitment
Percentage of the Canadian Revolving Committed Amount, (i) to make Canadian
Revolving Loans in accordance with the provisions of Section 3.1(a), (ii) to
purchase participation interests in Canadian Letters of Credit in accordance
with the provisions of Section 3.3(c) and (iii) to accept Bankers' Acceptances
in accordance with the provisions of Section 3.4(a).

      "Canadian Revolving Loans" shall have the meaning assigned to such term in
Section 3.1(a).

      "Canadian Revolving Committed Amount" shall have the meaning assigned to
such term in Section 3.1(a).

                                       6

<PAGE>

      "Canadian Subsidiary" means a direct or indirect Subsidiary of Airgas
which is organized and existing under the laws of Canada or any province or
other political subdivision thereof.

      "Canadian Subsidiary Guarantors" means each of the Persons identified as a
"Canadian Subsidiary Guarantor" on the signature pages hereto and each Person
which may hereafter guaranty the Canadian Obligations by its execution of a
Joinder Agreement pursuant to Section 7.12, together with their successors and
permitted assigns, and "Canadian Subsidiary Guarantor" means any one of them.

      "Canadian Swingline Commitment" means the commitment of the Canadian
Swingline Lender to make Canadian Swingline Loans in an aggregate principal
amount at any time outstanding of up to the Canadian Swingline Committed Amount.

      "Canadian Swingline Committed Amount" shall have the meaning assigned to
such term in Section 3.2(a).

      "Canadian Swingline Lender" means BNS.

      "Canadian Swingline Loan" means a loan made pursuant to and defined in
Section 3.2(a).

      "Canadian Unused Fee" shall have the meaning assigned to such term in
Section 4.5(a)(ii).

      "Capital Lease" means, as applied to any Person, any lease of any Property
(whether real, personal or mixed) by that Person as lessee which, in accordance
with GAAP, is or should be accounted for as a capital lease on the balance sheet
of that Person.

      "Capital Stock" means (i) in the case of a corporation, capital stock,
(ii) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
capital stock, (iii) in the case of a partnership, partnership interests
(whether general or limited), (iv) in the case of a limited liability company,
membership interests and (v) any other interest or participation that confers on
a Person the right to receive a share of the profits and losses of, or
distributions of assets of, the issuing Person.

      "Cash Equivalents" means (a) securities issued or directly and fully
guaranteed or insured by the United States, the government of the Canada or any
agency or instrumentality thereof (to the extent that the full faith and credit
of the United States or Canada is pledged in support thereof) having maturities
of not more than twelve months from the date of acquisition, (b) U.S. Dollar or
Canadian Dollar denominated time deposits and certificates of deposit of (1) any
Lender, (2) any United States or Canadian commercial bank of recognized standing
having capital and surplus in excess of $500,000,000 (or C$800,000,000, as the
case may be) or (3) any bank whose short-term commercial paper rating from S&P
is at least A-1 or the equivalent thereof or from Moody's is at least P-1 or the
equivalent thereof (any such bank being an "Approved Bank"), in each case with
maturities of not more than 270 days from the date of acquisition, (c)
commercial paper and variable or fixed rate notes issued by any Approved Bank
(or by the parent company thereof) or any variable rate notes issued by, or
guaranteed by, any domestic corporation rated A-1 (or the equivalent thereof) or
better by S&P or P-1 (or the equivalent thereof) or better by Moody's and
maturing within six months of the date of acquisition, (d) repurchase agreements
entered into by any Person with a bank or trust company (including any of the
Lenders) or recognized securities dealer having capital and surplus in excess of
$500,000,000 (or C$800,000,000, as the case may be) for direct obligations
issued by or fully guaranteed by the United States or Canada in which such
Person shall have a perfected first priority security interest (subject to no
other Liens) and having, on the date of purchase thereof, a fair market value of
at least 100% of the amount of the

                                        7

<PAGE>

repurchase obligations and (e) Investments, classified in accordance with GAAP
as current assets, in money market investment programs registered under the
Investment Company Act of 1940, as amended, which are administered by reputable
financial institutions having capital of at least $500,000,000 and the
portfolios of which are limited to Investments of the character described in the
foregoing subdivisions (a) through (d).

      "CDOR" means, for any day, the rate per annum (rounded upwards, if
necessary, to the nearest whole multiple of 1/100 of 1%) quoted by BNS as the
rate for its 30 day Canadian Dollar bankers' acceptances appearing on the
Reuters Screen CDOR page as of 10:00 A.M. (Toronto, Canada time) on such day,
provided that if such rate does not appear on the Reuters Screen CDOR page at
such time on such day, the rate for such day will be the average of all of the
bankers' acceptances discount rates posted on the Reuters Screen CDOR page for
30 day Canadian Dollar bankers' acceptances at such time on such day with
respect to the Schedule I chartered banks of Canada.

      "Closing Date" means January 14, 2005.

      "Code" means the Internal Revenue Code of 1986, as amended, and any
successor thereto, as interpreted by the rules and regulations issued
thereunder, in each case as in effect from time to time. References to sections
of the Code shall be construed also to refer to any successor sections.

      "Collateral" means a collective reference to all personal Property with
respect to which Liens in favor of the Collateral Agent are purported to be
granted pursuant to and in accordance with the terms of the Collateral
Documents.

      "Collateral Agent" means Bank of America, in its capacity as collateral
agent under the Collateral Documents, together with any successors or assigns.

      "Collateral and Guarantor Release Date" means the first date, if any, that
occurs after the Closing Date or after a Collateralization Date (a) on which the
Applicable Percentage is and has been based on "Pricing Level I" or "Pricing
Level II" for two consecutive fiscal quarters and (b) that the Guaranty
Obligations of all of the Guarantors of Airgas' obligations under the Medium
Term Note Indenture (and the Medium Term Notes) and all Junior Financing
Documentation have been released (or will be released contemporaneously upon the
release of the Guarantors hereunder) (it being understood that a Collateral and
Guarantor Release Date may occur more than once during the term of this Credit
Agreement). For purposes of clarification, the occurrence of a Collateral and
Guarantor Release Date shall not result in the release of Airgas from its
obligations under Article XII.

      "Collateral Documents" means a collective reference to the Pledge
Agreement and any other pledge or similar agreement executed and delivered in
accordance with Section 7.13.

      "Collateralization Date" means the first date, if any, following a
Collateral and Guarantor Release Date, on which either (a) the Applicable
Percentage is based on "Pricing Level III", "Pricing Level IV" or "Pricing Level
V" or (b) any Subsidiary of Airgas guarantees Airgas' obligations under the
Medium Term Note Indenture (or the Medium Term Notes) or any Junior Financing
Documentation (it being understood that a Collateralization Date may occur more
than once during the term of this Credit Agreement).

      "Commitment" means (i) with respect to each U.S. Revolving Lender, the
U.S. Revolving Commitment of such Lender, (ii) with respect to each U.S. Term
Lender, the U.S. Term Loan Commitment of such Lender, (iii) with respect to each
Canadian Lender, the Canadian Revolving Commitment of such Lender, (iv) with
respect to the U.S. Swingline Lender, the U.S. Swingline Commitment, (v) with
respect to the Canadian Swingline Lender, the Canadian Swingline Commitment, (v)
with respect to the U.S. Issuing

                                       8

<PAGE>

Lenders, the U.S. LOC Commitment and (vi) with respect to the Canadian Issuing
Lender, the Canadian LOC Commitment.

      "Competitive U.S. Bid" means an offer by a U.S. Revolving Lender to make a
Competitive U.S. Loan pursuant to the terms of Section 2.2.

      "Competitive U.S. Bid Rate" means, as to any Competitive U.S. Bid made by
a U.S. Revolving Lender in accordance with the provisions of Section 2.2, the
fixed rate of interest offered by the U.S. Revolving Lender making the
Competitive U.S. Bid.

      "Competitive U.S. Loan" means a loan made by a U.S. Revolving Lender in
its discretion pursuant to the provisions of Section 2.2.

      "Consolidated Capital Expenditures" means, for any period, all capital
expenditures of the Consolidated Parties on a consolidated basis during such
period, as determined in accordance with GAAP; provided, however, that
Consolidated Capital Expenditures shall not include (i) capital expenditures
constituting Eligible Reinvestments made with the proceeds of any Asset
Disposition or (ii) Acquisitions.

      "Consolidated EBITDA" means, for any period, the sum of (i) Consolidated
Net Income for such period, plus (ii) an amount which, in the determination of
Consolidated Net Income for such period, has been deducted for (A) Consolidated
Interest Expense, (B) total federal, state, local and foreign income, value
added and similar taxes, (C) depreciation and amortization expense, (D) one-time
cash expenses incurred in connection with the refinancing of the Existing Credit
Agreement, (E) non-cash, non-recurring charges, (F) any losses realized upon the
disposition of Property other than the disposition of Inventory in the ordinary
course of business, (G) other non-cash expenses (excluding any non-cash expense
to the extent that it represents an accrual of or reserve for cash expenses in
any future period) and (H) one-time charges resulting from the permanent closure
of facilities, the termination of employees and other costs directly associated
with the Acquisition of the packaged gas business of The BOC Group, Inc. and the
financing thereof to the extent such charges were incurred not later than
January 31, 2006 and not exceeding $15,000,000 in the aggregate, minus (iii) an
amount which, in the determination of Consolidated Net Income for such period,
has been included for (A) non-cash gains during such period and (B) any gains
realized upon the disposition of Property other than the disposition of
Inventory in the ordinary course of business, all as determined in accordance
with GAAP. The portion of Consolidated EBITDA attributable to the packaged gas
business of The BOC Group, Inc. for each of the four full fiscal quarters
immediately preceding July 31, 2004 shall be reasonably satisfactory to the U.S.
Agent.

      "Consolidated Interest Coverage Ratio" means, as of any date of
determination, the ratio of (i) Consolidated EBITDA for the period of the four
fiscal quarters most recently ended on or prior to such date to (ii)
Consolidated Interest Expense for such period.

      "Consolidated Interest Expense" means, for any period, the sum of (i)
interest expense (including the amortization of debt discount and premium, the
interest component under Capital Leases and Synthetic Leases) of the
Consolidated Parties on a consolidated basis and (ii) the implied interest
component and all other fees and expenses under the Permitted Receivables
Financing.

      "Consolidated Leverage Ratio" means, as of any date of determination, the
ratio of (i) Funded Indebtedness of the Consolidated Parties on a consolidated
basis as of such date to (ii) Consolidated EBITDA for the period of the four
fiscal quarters most recently ended on or prior to such date.

      "Consolidated Net Income" means, for any period, the sum of (i) the sum,
without duplication, of net income (excluding extraordinary items) after taxes
for such period of the Consolidated Parties, plus (ii)

                                       9

<PAGE>

to the extent not included in the amount determined pursuant to clause (i) above
and to the extent paid in cash to a Consolidated Party, equity earnings of
unconsolidated Affiliates for such period minus (iii) to the extent included in
the amount determined pursuant to clause (i) above and to the extent not paid in
cash to a Consolidated Party, equity earnings of Affiliates that are not
consolidated (on the consolidation basis) with Airgas for such period, all as
determined in accordance with GAAP.

      "Consolidated Parties" means a collective reference to each of Airgas and
its Restricted Subsidiaries.

      "Consolidated Senior Leverage Ratio" means, as of any date of
determination, the ratio of (i) the sum of (A) total Funded Indebtedness (other
than Funded Indebtedness of the types described in clauses (viii), (ix) and (x)
of the definition thereof) of the Consolidated Parties on a consolidated basis
as of such date less (B) the outstanding principal amount of Subordinated Debt
of the Consolidated Parties on a consolidated basis as of such date to (ii)
Consolidated EBITDA for the period of the four fiscal quarters most recently
ended on or prior to such date.

      "Credit Documents" means a collective reference to this Credit Agreement,
the Collateral Documents, the Intercreditor Agreement, the U.S. LOC Documents,
the Canadian LOC Documents, Bankers' Acceptances, each Joinder Agreement, the
U.S. Agent's Fee Letter and the Canadian Agent's Fee Letter.

      "Credit Parties" means a collective reference to each of Airgas, the
Canadian Borrowers and the Guarantors.

      "Credit Party Obligations" means without duplication, (i) all of the
obligations of the Borrowers and the Guarantors to the Lenders, the Agents and
the Collateral Agent, whenever arising, under this Credit Agreement or any of
the other Credit Documents (including, but not limited to, any interest accruing
after the occurrence of a Bankruptcy Event with respect to any Credit Party,
regardless of whether such interest is an allowed claim under the Bankruptcy
Code) and (ii) all liabilities and obligations, whenever arising, owing from the
Borrowers to any Lender, or any affiliate of a Lender, arising under any Hedging
Agreement.

      "Default" means any event, act or condition which with notice or lapse of
time, or both, would constitute an Event of Default.

      "Defaulting Lender" means any Lender that (a) has failed to fund any
portion of the Loans, participations in LOC Obligations or participations in
U.S. Swingline Loans or Canadian Swingline Loans required to be funded by it
hereunder or create Bankers' Acceptances as required by it hereunder, in each
case, within one Business Day of the date required hereunder, (b) has otherwise
failed to pay over to the applicable Agent or any other Lender any other amount
required to be paid by it hereunder within one Business Day of the date when
due, unless such payment is the subject of a good faith dispute, or (c) has been
deemed insolvent or become the subject of a bankruptcy or insolvency proceeding.

      "Discount Rate" means (i) in respect of any Bankers' Acceptances to be
acquired pursuant to Section 3.4 by a Canadian Lender which is a Schedule I
chartered bank, the discount rate quoted by the principal office of such
Canadian Lender at approximately 10:00 A.M. (Toronto time) (or such other time
as may be practicable for the determination of the Discount Rate) as the
discount rate at which such Canadian Lender would purchase bankers' acceptances
accepted by such Canadian Lender and with a term to maturity the same as the
Bankers' Acceptances to be acquired by such Canadian Lender on the date of
acceptance of such Bankers' Acceptances, and (ii) in respect of any Bankers'
Acceptances to be acquired pursuant to Section 3.4 by a Canadian Lender which is
not a Schedule I chartered bank, the

                                       10

<PAGE>

lesser of (a) the discount rate quoted by the principal office of such Canadian
Lender at approximately 10:00 a.m (Toronto time) (or such other time as may be
practicable for the determination of the Discount Rate) as the discount rate at
which such Canadian Lender would purchase bankers' acceptances accepted by such
Canadian Lender and with a term to maturity the same as the Bankers' Acceptances
to be acquired by such Canadian Lender on the date of acceptance of such
Bankers' Acceptances and (b) the discount rate calculated pursuant to clause (i)
plus 7.5 basis points.

      "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible, or for which it is
exchangeable, in each case at the option of the holder of the Capital Stock), or
upon the happening of any event, matures or is mandatorily redeemable, pursuant
to a sinking fund obligation or otherwise, or redeemable at the option of the
holder of the Capital Stock, in whole or in part, on or prior to the date that
is 91 days after the Termination Date. Notwithstanding the preceding sentence,
(i) any Capital Stock that would constitute Disqualified Stock solely because
the holders of the Capital Stock have the right to require Airgas to repurchase
such Capital Stock upon the occurrence of a change of control or an asset sale
will not constitute Disqualified Stock if the terms of such Capital Stock
provide that Airgas may not repurchase or redeem any such Capital Stock pursuant
to such provisions unless such repurchase or redemption complies with Section
8.6 of this Credit Agreement and (ii) the preferred stock issued under the
National Welders Joint Venture shall be deemed not to be "Disqualified Stock".

      "Domestic Subsidiary" means any direct or indirect Subsidiary of Airgas
(other than a direct or indirect Subsidiary of a Foreign Subsidiary) which is
incorporated or organized under the laws of any State of the United States or
the District of Columbia.

      "Eligible Assignee" means (a) a Lender; (b) an Affiliate of a Lender; (c)
an Approved Fund; and (d) any other Person (other than a natural person)
approved by (i) the U.S. Agent (and in the case of any assignment by a Canadian
Lender, the Canadian Agent), (ii) in the case of any assignment of a U.S.
Revolving Commitment, each U.S. Issuing Lender and the U.S. Swingline Lender,
(iii) in the case of any assignment of a Canadian Revolving Commitment, the
Canadian Issuing Lender and the Canadian Swingline Lender, and (iv) unless an
Event of Default has occurred and is continuing, Airgas (each such approval in
clauses (i) through (iv) not to be unreasonably withheld or delayed); provided
that notwithstanding the foregoing, "Eligible Assignee" shall not include Airgas
or any of Airgas' Affiliates or Subsidiaries.

      "Eligible Reinvestment" means (i) any acquisition (whether or not
constituting a capital expenditure, but not constituting an Acquisition) of
assets or any business (or any substantial part thereof) used or useful in the
same or a similar or ancillary line of business as Airgas and its Restricted
Subsidiaries were engaged in on the Closing Date (or any reasonable extensions
or expansions thereof) and (ii) any Permitted Acquisition. The term "Eligible
Reinvestment" shall not include any item which is not a permitted application of
proceeds of an "Asset Sale" (or any comparable term) under, and as defined in,
any Junior Financing Documentation.

      "Environmental Laws" means any and all lawful and applicable Federal,
state, local, Canadian and foreign statutes, laws, regulations, ordinances,
rules, judgments, orders, decrees, permits, concessions, grants, franchises,
licenses, agreements or other governmental restrictions relating to the
environment or to emissions, discharges, releases or threatened releases of
pollutants, contaminants, chemicals, or industrial, toxic or hazardous
substances or wastes into the environment including, without limitation, ambient
air, surface water, ground water, or land, or otherwise relating to the
manufacture, processing, distribution, use, treatment, storage, disposal,
transport, or handling of pollutants, contaminants, chemicals, or industrial,
toxic or hazardous substances or wastes.

                                       11

<PAGE>

      "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended, and any successor statute thereto, as interpreted by the rules and
regulations thereunder, all as the same may be in effect from time to time.
References to sections of ERISA shall be construed also to refer to any
successor sections.

      "ERISA Affiliate" means an entity which is under common control with
Airgas or any Subsidiary of Airgas within the meaning of Section 4001(a)(14) of
ERISA, or is a member of a group which includes Airgas or any Subsidiary of
Airgas and which is treated as a single employer under Sections 414(b), (c),
(m), or (o) of the Code.

      "Eurodollar Base Rate" means, for any Interest Period with respect to a
Eurodollar Loan, the rate per annum equal to the British Bankers Association
LIBOR Rate ("BBA LIBOR"), as published by Reuters (or other commercially
available source providing quotations of BBA LIBOR as designated by the U.S.
Agent from time to time) at approximately 11:00 a.m. (London time) two Business
Days prior to the commencement of such Interest Period, for U.S. Dollar deposits
(for delivery on the first day of such Interest Period) with a term equivalent
to such Interest Period. If such rate is not available at such time for any
reason, then the "Eurodollar Rate" for such Interest Period shall be the rate
per annum determined by the U.S. Agent to be the rate at which deposits in U.S.
Dollars for delivery on the first day of such Interest Period in same day funds
in the approximate amount of the Eurodollar Loan being made, continued or
converted by Bank of America and with a term equivalent to such Interest Period
would be offered by Bank of America's London Branch to major banks in the London
interbank eurodollar market at their request at approximately 11:00 a.m. (London
time) two Business Days prior to the commencement of such Interest Period.

      "Eurodollar Loan" means any Loan bearing interest at a rate determined by
reference to the Eurodollar Rate.

      "Eurodollar Rate" means, for any Interest Period with respect to any
Eurodollar Rate Loan, a rate per annum determined by the U.S. Agent to be equal
to the quotient obtained by dividing (a) the Eurodollar Base Rate for such
Eurodollar Loan for such Interest Period by (b) one minus the Eurodollar Reserve
Percentage for such Eurodollar Loan for such Interest Period.

      "Eurodollar Reserve Percentage" means, for any day during any Interest
Period, the reserve percentage (expressed as a decimal, carried out to five
decimal places) in effect on such day, whether or not applicable to any Lender,
under regulations issued from time to time by the Board of Governors of the
Federal Reserve System of the United States for determining the maximum reserve
requirement (including any emergency, supplemental or other marginal reserve
requirement) with respect to Eurocurrency funding (currently referred to as
"Eurocurrency liabilities"). The Eurodollar Rate for each outstanding Eurodollar
Loan shall be adjusted automatically as of the effective date of any change in
the Eurodollar Reserve Percentage.

      "Event of Default" shall have the meaning assigned to such term in Section
9.1.

      "Excluded Asset Disposition" means, with respect to any Consolidated
Party, any Asset Disposition consisting of (i) the sale, lease, license,
transfer or other disposition of inventory in the ordinary course of such
Consolidated Party's business, (ii) the sale, lease, license, transfer or other
disposition of obsolete machinery and equipment or machinery and equipment no
longer used or useful in the conduct of such Consolidated Party's business,
(iii) any sale, lease, license, transfer or other disposition of Property by
such Consolidated Party to any U.S. Credit Party, (iv) any sale, lease, license,
transfer or other disposition of Property by a Canadian Subsidiary to any
Canadian Credit Party, (v) any portion of an Asset Disposition by such
Consolidated Party constituting a Permitted Investment, (vi) if

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such Consolidated Party is not a Credit Party, any sale, lease, license,
transfer or other disposition of Property by such Consolidated Party to any
Consolidated Party that is not a Credit Party, (viii) the sale or disposition of
Cash Equivalents for fair market value, (ix) the disposition of cash in
connection with a transaction permitted under the Credit Agreement, (x) any sale
of Securitization Assets by such Consolidated Party to the Receivables
Subsidiary in connection with the Permitted Receivables Financing, (xi) to the
extent constituting an Asset Disposition, the creation of any Permitted Lien,
and (xii) the sale of the assets identified on Schedule 1.1A; provided, however,
that the term "Excluded Asset Disposition" shall not include (A) any Asset
Disposition to the extent that any portion of the proceeds of such Asset
Disposition would be required under any Junior Financing Documentation to be
applied to permanently retire Indebtedness of the Consolidated Parties and (B)
any transfer of assets to any Person identified on Schedule 1.1A by a
Consolidated Party not identified on Schedule 1.1A to the extent such transfer
of assets was made in contemplation of an Asset Disposition permitted by clause
(xii) above.

      "Executive Officer" means, in respect of any Person, the chief executive
officer, chief operating officer, treasurer or chief financial officer of such
Person.

      "Existing Canadian Letters of Credit" means the letters of credit
described by date of issuance, letter of credit number, undrawn amount, name of
beneficiary and date of expiry on Schedule 1.1B hereto.

      "Existing Credit Agreement" shall have the meaning assigned to such term
in the recitals hereof.

      "Existing U.S. Letters of Credit" means the letters of credit described by
date of issuance, letter of credit number, undrawn amount, name of beneficiary
and date of expiry on Schedule 1.1C hereto.

      "Face Amount" means, in respect of a Bankers' Acceptance, the amount
payable to the holder thereof on maturity.

      "Federal Funds Rate" means, for any day, the rate per annum equal to the
weighted average of the rates on overnight Federal funds transactions with
members of the Federal Reserve System arranged by Federal funds brokers on such
day, as published by the Federal Reserve Bank of New York on the Business Day
next succeeding such day; provided that (a) if such day is not a Business Day,
the Federal Funds Rate for such day shall be such rate on such transactions on
the next preceding Business Day as so published on the next succeeding Business
Day, and (b) if no such rate is so published on such next succeeding Business
Day, the Federal Funds Rate for such day shall be the average rate (rounded
upward, if necessary, to a whole multiple of 1/100 of 1%) charged to Bank of
America on such day on such transactions as determined by the U.S. Agent.

       "Foreign Subsidiary" means any direct or indirect Subsidiary of Airgas
which is not is incorporated or organized under the laws of any State of the
United States or the District of Columbia.

      "Fund" means any Person (other than a natural person) that is (or will be)
engaged in making, purchasing, holding or otherwise investing in commercial
loans and similar extensions of credit in the ordinary course of its business.

      "Funded Indebtedness" means, with respect to any Person, without
duplication, (i) all obligations of such Person for borrowed money, (ii) all
obligations of such Person evidenced by bonds, debentures, notes or similar
instruments, or upon which interest payments are customarily made, (iii) all
obligations of such Person issued or assumed as the deferred purchase price of
Property or services purchased by such Person (other than trade debt incurred in
the ordinary course of business and due within six months of the incurrence
thereof) which would appear as liabilities on a balance sheet of such Person,
(iv) the implied principal component of all obligations of such Person under
Capital Leases, (v) all Guaranty Obligations of

                                       13

<PAGE>

such Person with respect to Funded Indebtedness of another Person, (vi) all net
obligations of such Person in respect of Hedging Agreements, (vii) the maximum
available amount of, and all unreimbursed drawings under, all standby letters of
credit or acceptances issued or created for the account of such Person
(provided, however, in connection with any calculation hereunder of Funded
Indebtedness of the Consolidated Parties on a consolidated basis, there shall be
excluded any standby letter of credit or acceptance (together with any
unreimbursed drawings under such letter of credit or acceptance) which supports
any Funded Indebtedness of any Consolidated Party that would otherwise be
included in such calculation), (viii) the principal portion of all obligations
of such Person under Synthetic Leases, (ix) all Disqualified Stock of such
Person, and (x) the outstanding Attributed Principal Amount under any
Securitization Transaction, and (xi) all Funded Indebtedness of others secured
by (or for which the holder of such Funded Indebtedness has an existing right,
contingent or otherwise, to be secured by) any Lien on, or payable out of the
proceeds of production from, Property owned or acquired by such Person, whether
or not the obligations secured thereby have been assumed. The Funded
Indebtedness of any Person (a) shall include the Funded Indebtedness of any
partnership or joint venture in which such Person is a general partner or joint
venturer to the extent that such Person is legally liable for such Funded
Indebtedness and (b) shall not include any Indebtedness of a Consolidated Party
owing to another Consolidated Party.

      "GAAP" means generally accepted accounting principles in the United States
applied on a consistent basis and subject to the terms of Section 1.3 hereof.

      "Governmental Authority" means any Federal, state, provincial, local or
foreign court or governmental agency, authority, instrumentality or regulatory
body.

      "Guarantors" means collectively, the U.S. Subsidiary Guarantors and the
Canadian Guarantors, and "Guarantor" means any one of them.

      "Guaranty Obligations" means, with respect to any Person, without
duplication, any obligations of such Person (other than endorsements in the
ordinary course of business of negotiable instruments for deposit or collection)
guaranteeing or intended to guarantee any Indebtedness of any other Person in
any manner, whether direct or indirect, and including without limitation any
obligation, whether or not contingent, (i) to purchase any such Indebtedness or
any Property constituting security therefor, (ii) to advance or provide funds or
other support for the payment or purchase of any such Indebtedness or to
maintain working capital, solvency or other balance sheet condition of such
other Person (including without limitation keep well agreements, maintenance
agreements, comfort letters or similar agreements or arrangements to the extent
such agreements or arrangements constitute a legally binding monetary
obligation) for the benefit of any holder of Indebtedness of such other Person,
(iii) to lease or purchase Property, securities or services primarily for the
purpose of assuring the holder of such Indebtedness, or (iv) to otherwise assure
or hold harmless the holder of such Indebtedness against loss in respect
thereof. The amount of any Guaranty Obligation hereunder shall (subject to any
limitations set forth therein) be deemed to be an amount equal to the
outstanding principal amount (or maximum principal amount, if larger) of the
Indebtedness in respect of which such Guaranty Obligation is made.

      "Hedging Agreements" means any interest rate protection agreement,
commodities purchase agreement or foreign currency exchange agreement.

      "Immaterial Foreign Subsidiary" means, at any time, any Foreign Subsidiary
that does not (a) have total revenues for the most recently ended fiscal year in
excess of $5,000,000 and (b) together with the other Foreign Subsidiaries for
which the Credit Parties have not (i) delivered pledge or similar agreements
that are governed by the laws of the jurisdictions of organization of such
Foreign Subsidiaries and (ii) provided legal opinions of foreign counsel with
respect to such Foreign Subsidiaries in connection with the execution of Joinder
Agreements by such Foreign Subsidiaries and the pledge of the Capital Stock of

                                       14

<PAGE>

such Foreign Subsidiaries pursuant to the Collateral Documents, have aggregate
total revenues for the most recently ended fiscal year in excess of $15,000,000.

      "Indebtedness" of any Person means, without duplication, (i) all Funded
Indebtedness of such Person, (ii) all Guaranty Obligations of such Person, (iii)
all obligations of such Person under conditional sale or other title retention
agreements relating to Property purchased by such Person (other than customary
reservations or retentions of title under agreements with suppliers entered into
in the ordinary course of business) and (iv) all obligations of such Person
under take-or-pay or similar arrangements or under commodities agreements. The
Indebtedness of any Person (a) shall include the Indebtedness of any partnership
or joint venture in which such Person is a general partner or joint venturer to
the extent that such Person is legally liable for such Indebtedness and (b)
shall not include any Indebtedness of a Consolidated Party owing to another
Consolidated Party.

      "Intercreditor Agreement" means that certain Intercreditor Agreement dated
as of the Closing Date among the Agents and the Lenders.

      "Interest Payment Date" means (i) as to any U.S. Base Rate Loan, the last
day of each March, June, September and December, the date of repayment of
principal of such Loan and the Termination Date, (ii) as to any Canadian
Revolving Loan, the first Business Day of each calendar month, the date of
repayment of principal of such Loan and the Termination Date and (iii) as to any
Eurodollar Loan, any Competitive U.S. Loan, any U.S. Swingline Loan or any
Canadian Swingline Loan, the last day of each Interest Period for such Loan, the
date of repayment of principal of such Loan and the Termination Date, and in
addition where the applicable Interest Period is more than 3 months, then also
on the date 3 months from the beginning of the Interest Period, and each 3
months thereafter. If an Interest Payment Date falls on a date which is not a
Business Day, such Interest Payment Date shall be deemed to be the next
succeeding Business Day, except that in the case of Eurodollar Loans where the
next succeeding Business Day falls in the next succeeding calendar month, then
on the next preceding Business Day.

      "Interest Period" means (i) as to any Eurodollar Loan, a period of one,
two, three, six or twelve month's duration, as Airgas may elect, commencing in
each case, on the date of the borrowing (including conversions, extensions and
renewals), (ii) as to any Competitive U.S. Loan, a period commencing in each
case on the date of the borrowing and ending on the date specified in the
applicable Competitive U.S. Bid whereby the offer to make such Competitive U.S.
Loan was extended (such ending date in any event to be not more than 180 days
from the date of the borrowing), (iii) as to any U.S. Swingline Loan, a period
commencing in each case on the date of the borrowing and ending on the date
agreed to by Airgas and the U.S. Swingline Lender in accordance with the
provisions of Section 2.4(b)(i) (such ending date in any event to be not more
than thirty (30) days from the date of borrowing) and (iv) as to any Canadian
Swingline Loan, a period commencing in each case on the date of the borrowing
and ending on the date agreed to by the applicable Canadian Borrower and the
Canadian Swingline Lender; provided, however, (A) if any Interest Period would
end on a day which is not a Business Day, such Interest Period shall be extended
to the next succeeding Business Day (except that in the case of Eurodollar Loans
where the next succeeding Business Day falls in the next succeeding calendar
month, then on the next preceding Business Day), (B) no Interest Period shall
extend beyond the Termination Date, and (C) in the case of Eurodollar Loans,
where an Interest Period begins on a day for which there is no numerically
corresponding day in the calendar month in which the Interest Period is to end,
such Interest Period shall end on the last day of such calendar month.

      "Investment" in any Person means (a) the acquisition (whether for cash,
property, services, assumption of Indebtedness, securities or otherwise) of
assets (other than equipment, inventory and supplies in the ordinary course of
business and other than any acquisition of assets constituting a Consolidated
Capital Expenditure), Capital Stock, bonds, notes, debentures, partnership,
joint ventures or other ownership interests or other securities of such other
Person, (b) any deposit with, or advance, loan or other extension of

                                       15

<PAGE>

credit to, such Person (other than deposits made in connection with the purchase
of equipment, inventory and supplies in the ordinary course of business) or (c)
any other capital contribution to or investment in such Person, including,
without limitation, any Guaranty Obligations (including any support for a letter
of credit issued on behalf of such Person) incurred for the benefit of such
Person and any portion of an Asset Disposition (other than an Excluded Asset
Disposition) to such Person for consideration less than the fair market value of
the Property disposed in such transaction, but excluding any Restricted Payment
to such Person. Investments which are capital contributions or purchases of
Capital Stock which have a right to participate in the profits of the issuer
thereof shall be valued at the amount actually contributed or paid to purchase
such Capital Stock as of the date of such contribution or payment. Investments
which are loans, advances, extensions of credit or Guaranty Obligations shall be
valued at the principal amount of such loan, advance or extension of credit
outstanding as of the date of determination or, as applicable, the principal
amount of the loan or advance outstanding as of the date of determination
actually guaranteed by such Guaranty Obligation.

      "Involuntary Disposition" means any loss of, damage to or destruction of,
or any condemnation or other taking for public use of, any Property of any
Consolidated Party.

      "ISP" means, with respect to any Letter of Credit, the "International
Standby Practices 1998" published by the Institute of International Banking Law
& Practice (or such later version thereof as may be in effect at the time of
issuance).

      "Joinder Agreement" means a Joinder Agreement substantially in the form of
Exhibit 7.12 hereto, executed and delivered by a Person required to become a
Guarantor in accordance with the provisions of Section 7.12.

      "Junior Financing Documentation" means (i) the Subordinated Note
Indentures, (ii) the Subordinated Notes and (iii) any other documentation
governing any Subordinated Debt.

      "Lenders" means each Canadian Lender, each U.S. Revolving Lender and each
U.S. Term Lender and, as the context requires, the U.S. Issuing Lenders, the
Canadian Issuing Lender, the U.S. Swingline Lender and the Canadian Swingline
Lender, together with their successors and permitted assigns.

      "Letter of Credit" means any U.S. Letter of Credit or any Canadian Letter
of Credit.

      "Lien" means any mortgage, pledge, hypothecation, assignment, deposit
arrangement, security interest, encumbrance, lien (statutory or otherwise),
preference, priority or charge of any kind (including any agreement to give any
of the foregoing, any conditional sale or other title retention agreement, any
financing or similar statement or notice filed under the Uniform Commercial Code
as adopted and in effect in the relevant jurisdiction, the Personal Property
Security Act (Ontario) or other similar recording or notice statute, and any
lease in the nature thereof).

      "Loan" or "Loans" means the U.S. Revolving Loans and the U.S. Term Loans,
the Competitive U.S. Loans, the Canadian Revolving Loans, the BA Outstandings,
the U.S. Swingline Loans and/or the Canadian Swingline Loans, individually or
collectively, as appropriate.

      "LOC Obligations" means the U.S. LOC Obligations and the Canadian LOC
Obligations.

      "Material Adverse Effect" means a material adverse effect on (i) the
condition (financial or otherwise), operations, business, assets or liabilities
of the Consolidated Parties taken as a whole, (ii) the ability of the Credit
Parties taken as a whole to perform any material obligation under the Credit
Documents or (iii) the material rights and remedies of the Lenders under the
Credit Documents.

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<PAGE>

      "Materials of Environmental Concern" means any gasoline or petroleum
(including crude oil or any fraction thereof) or petroleum products or any
hazardous or toxic substances, materials or wastes, defined or regulated as such
in or under any Environmental Laws, including, without limitation, asbestos,
polychlorinated biphenyls and urea-formaldehyde insulation.

      "Medium Term Notes" means any one of the notes issued by Airgas in favor
of the Medium Term Noteholders pursuant to the Medium Term Note Indenture, as
such Medium Term Notes may be amended, modified, restated or supplemented and in
effect from time to time in accordance with the terms hereof.

      "Medium Term Note Indenture" means a collective reference to that certain
Indenture dated as of August 1, 1996, among Airgas and The Bank of New York as
Trustee, as such Medium Term Note Indenture may be amended, modified, restated
or supplemented and in effect from time to time in accordance with the terms
hereof.

      "Medium Term Noteholder" means any one of the holders from time to time of
the Medium Term Notes.

      "Moody's" means Moody's Investors Service, Inc., or any successor or
assignee of the business of such company in the business of rating securities.

      "Multiemployer Plan" means a Plan which is a multiemployer plan as defined
in Sections 3(37) or 4001(a)(3) of ERISA.

      "Multiple Employer Plan" means a Plan which a Consolidated Party or any
ERISA Affiliate and at least one employer other than a Consolidated Party or any
ERISA Affiliate are contributing sponsors.

      "National Welders" means National Welders Supply Company, Inc., a North
Carolina corporation.

      "National Welders Joint Venture Agreement" means that certain joint
venture agreement dated June 28, 1996 by and among Airgas, National Welders,
J.A. Turner, Jr., Judith Carpenter, J.A. Turner, III and Linerieux B. Turner.

      "National Welders Liens" means the liens and security interests on the
assets of National Welders as described on Schedule 1.1D hereto.

      "Net Cash Proceeds" means the aggregate cash or Cash Equivalents proceeds
received by any Consolidated Party in respect of any Asset Disposition, net of
(a) direct costs (including, without limitation, legal, accounting and
investment banking fees, and sales commissions), (b) taxes paid or payable as a
result thereof or in connection therewith or attributable thereto and (c) the
amount necessary to retire any Indebtedness secured by a Permitted Lien (ranking
senior to any Lien of the U.S. Agent) on the related Property; it being
understood that "Net Cash Proceeds" shall include, without limitation, any cash
or Cash Equivalents received upon the sale or other disposition of any non-cash
consideration received by any such Consolidated Party in any Asset Disposition.
In addition, the "Net Cash Proceeds" of any Asset Disposition shall include any
other amounts which constitute "Net Proceeds" (or any comparable term) of such
transaction under, and as defined in, any Junior Financing Documentation.

      "New Commitment Agreement" shall have the meaning assigned to such term in
Section 4.4(b).

      "Non-Excluded Taxes" shall have the meaning assigned to such term in
Section 4.10.

                                       17

<PAGE>

      "Notice of Borrowing" means (a) in the case of U.S. Revolving Loans or the
U.S. Term Loan, a written notice of borrowing in substantially the form of
Exhibit 2.1(b)(i), as required by Section 2.1(b)(i) or Section 2.5(b), as
applicable, or (b) in the case of Canadian Revolving Loans, a written notice of
borrowing in substantially the form of Exhibit 3.1(b)(i).

      "Notice of Extension/Conversion" means the written notice of extension or
conversion in substantially the form of Exhibit 4.2, as required by Section 4.2.

      "Operating Accounts" shall have the meaning assigned to such term in
Section 3.2(a).

      "Operating Lease" means, as applied to any Person, any lease (including,
without limitation, leases which may be terminated by the lessee at any time) of
any Property (whether real, personal or mixed) which is not a Capital Lease
other than any such lease in which that Person is the lessor.

      "Participant" shall have the meaning assigned to such term in Section
11.3(d).

      "PBGC" means the Pension Benefit Guaranty Corporation established pursuant
to Subtitle A of Title IV of ERISA and any successor thereof.

      "Permitted Acquisition" means an Acquisition by Airgas or any Subsidiary
of Airgas permitted pursuant to the terms of Section 8.5(i).

      "Permitted Investments" means, at any time, Investments by the
Consolidated Parties permitted to exist at such time pursuant to the terms of
Section 8.5.

      "Permitted Liens" means:

            (i) Liens arising under the Collateral Documents;

            (ii) Liens (other than Liens created or imposed under ERISA) for
       taxes, assessments or governmental charges or levies not yet due or Liens
      for taxes being contested in good faith by appropriate proceedings for
      which adequate reserves determined in accordance with GAAP have been
      established (and as to which the Property subject to any such Lien is not
      yet subject to foreclosure, sale or loss on account thereof);

            (iii) statutory Liens of landlords and Liens of carriers,
      warehousemen, mechanics, materialmen and suppliers and other Liens imposed
      by law or pursuant to customary reservations or retentions of title
      arising in the ordinary course of business, provided that such Liens
      secure only amounts not yet due and payable or, if due and payable, are
      unfiled and no other action has been taken to enforce the same or are
      being contested in good faith by appropriate proceedings for which
      adequate reserves determined in accordance with GAAP have been established
      (and as to which the Property subject to any such Lien is not yet subject
      to foreclosure, sale or loss on account thereof);

            (iv) Liens (other than Liens created or imposed under ERISA)
      incurred or deposits made by the Consolidated Parties in the ordinary
      course of business in connection with workers' compensation, unemployment
      insurance and other types of social security, or to secure the performance
      of tenders, statutory obligations, bids, leases, government contracts,
      performance and return-of-money bonds and other similar obligations
      (exclusive of obligations for the payment of borrowed money);

                                       18

<PAGE>

            (v) Liens in connection with attachments or judgments (including
      judgment or appeal bonds) provided that the judgments secured shall,
      within 30 days after the entry thereof, have been discharged or execution
      thereof stayed pending appeal, or shall have been discharged within 30
      days after the expiration of any such stay;

            (vi) easements, rights-of-way, restrictions (including zoning
      restrictions), minor defects or irregularities in title and other similar
      charges or encumbrances not, in any material respect, impairing the use of
       the encumbered Property for its intended purposes;

            (vii) Liens existing as of the Closing Date and set forth on
      Schedule 1.1E;

            (viii) Liens on Property of any Person securing purchase money
      Indebtedness, Capital Leases and Synthetic Leases of such Person, provided
      that (a) any such Lien attaches to such Property (and only such Property)
      concurrently with or within 90 days after the incurrence of the
      Indebtedness secured thereby; (b) the Indebtedness secured thereby shall
      not exceed the purchase price of the asset(s) financed and (c) the
      aggregate principal amount of all Indebtedness secured thereby does not
      exceed $25,000,000;

            (ix) Liens on Property of any Person securing Indebtedness (other
      than purchase money Indebtedness and obligations under Capital Leases or
      Synthetic Leases) assumed or acquired by the Consolidated Parties in
      connection with a Permitted Acquisition, provided that (a) no such Lien
       shall at any time be extended to or cover any Property other than the
      Property subject thereto on the date the related Permitted Acquisition is
      consummated, (b) the Indebtedness secured by such Lien was not created in
      anticipation of the related Permitted Acquisition and (c) the aggregate
      principal amount of all Indebtedness secured thereby does not exceed
      $50,000,000;

            (x) leases or subleases granted to others not interfering in any
      material respect with the business of any Consolidated Party;

            (xi) any interest of title of a lessor under, and Liens arising from
      Uniform Commercial Code financing statements (or equivalent filings,
      registrations or agreements in foreign jurisdictions) relating to, leases
      permitted by this Credit Agreement;

            (xii) normal and customary rights of setoff upon deposits of cash in
      favor of banks or other depository institutions;

            (xiii) during the 180-day period immediately succeeding the first
      date as of which National Welders becomes a Restricted Subsidiary, if
      ever, the National Welders Liens;

            (xiv) Liens in favor of the Receivables Subsidiary or Receivables
      Financier created or deemed to exist in connection with the Permitted
      Receivables Financing (including any related filings of any financing
      statements), but only to the extent that any such Lien relates to the
      Securitization Assets actually sold, contributed, financed or otherwise
      conveyed or pledged pursuant to such transaction; and

            (xv) other Liens not described above, provided that such Liens do
      not secure obligations in excess of $25,000,000 at any one time
      outstanding.

      "Permitted Receivables Financing" means that certain Securitization
Transaction pursuant to the Receivables Purchase Agreement dated as of December
19, 2002 among the Receivables Subsidiary, Airgas, the Amended and Restated
Receivables Financiers party thereto and PNC Bank, National

                                       19

<PAGE>

Association, as administrator, as such agreement has been amended, modified,
extended, replaced, restated or substituted from time to time prior to the
Closing Date or as such agreement may hereafter be amended, modified, extended,
replaced, restated or substituted in accordance with the terms of this Credit
Agreement; provided that (i) the aggregate Attributed Principal Amount for such
Securitization Transaction shall not at any time exceed $300,000,000, (ii) such
Securitization Transaction shall not involve any recourse to any Consolidated
Party for any reason other than (A) repurchases of non-eligible receivables and
(B) indemnifications for losses other than credit losses related to the
receivables sold in such financing and (iii) the documentation for such
Securitization Transaction shall not be amended or modified, in any way that is
adverse to Airgas or the Lenders in any material respect, without the prior
approval of the U.S. Agent.

      "Person" means any individual, partnership, joint venture, firm,
corporation, limited liability company, association, trust or other enterprise
(whether or not incorporated) or any Governmental Authority.

      "Plan" means any employee benefit plan (as defined in Section 3(3) of
ERISA) which is covered by ERISA and with respect to which Airgas, any
Subsidiary of Airgas or any ERISA Affiliate is (or, if such plan were terminated
at such time, would under Section 4069 of ERISA be deemed to be) an "employer"
within the meaning of Section 3(5) of ERISA.

      "Pledge Agreement" means the Amended and Restated Pledge Agreement dated
as of the Closing Date among the Collateral Agent and the U.S. Credit Parties,
as amended, modified, restated or supplemented from time to time.

      "Pro Forma Basis" means, for purposes of calculating (utilizing the
principles set forth in the second paragraph of Section 1.3) compliance with
each of the financial covenants set forth in Section 7.10 in respect of a
proposed transaction, that such transaction shall be deemed to have occurred as
of the first day of the four fiscal-quarter period ending as of the most recent
fiscal quarter end preceding the date of such transaction with respect to which
the U.S. Agent has received the Required Financial Information. As used herein,
"transaction" shall mean (i) any incurrence or assumption of Indebtedness as
referred to in Section 8.1(a)(iv), (ii) any Asset Disposition as referred to in
Section 8.4(b), (iii) any Acquisition as referred to in Section 8.5(i) and (iv)
any Restricted Payment as referred to in Section 8.6(iii). In connection with
any calculation of the financial covenants set forth in Section 7.10 upon giving
effect to a transaction on a Pro Forma Basis:

             (A) for purposes of any such calculation in respect of any
      incurrence or assumption of Indebtedness as referred to in Section
      8.1(a)(iv), any Indebtedness which is retired in connection with such
      incurrence or assumption shall be excluded and deemed to have been retired
      as of the first day of the applicable period;

            (B) for purposes of any such calculation in respect of any Asset
      Disposition as referred to in Section 8.4(b), (1) income statement items
      (whether positive or negative) attributable to the Property disposed of
      shall be excluded and (2) any Indebtedness which is retired in connection
      with such transaction shall be excluded and deemed to have been retired as
      of the first day of the applicable period;

            (C) for purposes of any such calculation in respect of any
      Acquisition as referred to in Section 8.5(i), (1) any Indebtedness
      incurred by any Consolidated Party in connection with such transaction (x)
      shall be deemed to have been incurred as of the first day of the
      applicable period and (y) if such Indebtedness has a floating or formula
      rate, shall have an implied rate of interest for the applicable period for
      purposes of this definition determined by utilizing the rate which is or
      would be in effect with respect to such Indebtedness as at the relevant
      date of

                                       20

<PAGE>

      determination, (2) income statement items (whether positive or negative)
      attributable to the Person or Property acquired shall be included
      beginning as of the first day of the applicable period and (3) pro forma
      adjustments may be included to the extent that such adjustments meet the
      requirements of Regulation S-X under the Securities Act of 1933, as
      amended, and all other accounting rules and regulations of the SEC
      promulgated thereunder; and

            (D) for purposes of any such calculation in respect of any
      Restricted Payment as referred to in Section 8.6(iii), (1) any
      Indebtedness incurred by any Consolidated Party in connection with such
      transaction (x) shall be deemed to have been incurred as of the first day
      of the applicable period and (y) if such Indebtedness has a floating or
      formula rate, shall have an implied rate of interest for the applicable
      period for purposes of this definition determined by utilizing the rate
      which is or would be in effect with respect to such Indebtedness as at the
      relevant date of determination.

      "Pro Forma Compliance Certificate" means a certificate of an Executive
Officer of Airgas delivered to the U.S. Agent in connection with (i) any
incurrence, assumption or retirement of Indebtedness as referred to in Section
8.1(a)(iv), (ii) any Asset Disposition as referred to in Section 8.4(b), (iii)
any Acquisition as referred to in Section 8.5(i) or (iv) any Restricted Payment
as referred to in Section 8.6(iii), as applicable, and containing reasonably
detailed calculations, upon giving effect to the applicable transaction on a Pro
Forma Basis, of the Consolidated Leverage Ratio and the Consolidated Interest
Coverage Ratio as of the most recent fiscal quarter end preceding the date of
the applicable transaction with respect to which the U.S. Agent shall have
received the Required Financial Information.

      "Property" means any interest in any kind of property or asset, whether
real, personal or mixed, or tangible or intangible.

      "Quoted Rate" means, with respect to any Quoted Rate U.S. Swingline Loan,
the fixed percentage rate per annum offered by the U.S. Swingline Lender and
accepted by Airgas with respect to such U.S. Swingline Loan as provided in
accordance with the provisions of Section 2.4.

      "Quoted Rate U.S. Swingline Loan" means a U.S. Swingline Loan bearing
interest at a Quoted Rate.

      "Receivables Financier" means any of the "Conduit Purchasers" or "Related
Committed Purchasers" as such terms are defined in the documents governing the
Permitted Receivables Financing.

      "Receivables Subsidiary" means (i) Radnor Funding Corp., a Delaware
corporation, and (ii) any other Subsidiary or Affiliate of Airgas to which any
Consolidated Party sells, contributes or otherwise conveys any Securitization
Assets in connection with the Permitted Receivables Financing.

      "Redemption Obligation" means the contingent liability of any Consolidated
Party with respect to cash redemption obligations relating to any Capital Stock
issued by a Consolidated Party to any officer, director, shareholder or other
principal of any Subsidiary created or acquired after the Closing Date.

      "Regulation D, U, or X" means Regulation D, U or X, respectively, of the
Board of Governors of the Federal Reserve System as from time to time in effect
and any successor to all or a portion thereof.

      "Related Parties" means, with respect to any Person, such Person's
Affiliates and the partners, directors, officers, employees, agents and advisors
of such Person and of such Person's Affiliates.

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<PAGE>

      "Release" means any spilling, leaking, pumping, pouring, emitting,
emptying, discharging, injecting, escaping, leaching, dumping or disposing into
the environment (including the abandonment or discarding of barrels, containers
and other closed receptacles containing any Materials of Environmental Concern).

      "Reportable Event" means any of the events set forth in Section 4043(c) of
ERISA, other than those events as to which the post-event notice requirement is
waived under subsections .13, .14, .18, .19, or .20 of PBGC Reg. Section 2615.

      "Required Canadian Lenders" means, at any time, Lenders holding in the
aggregate more than 50% of (a) the unfunded Commitments denominated in Canadian
Dollars and the outstanding Loans denominated in Canadian Dollars, Canadian LOC
Obligations and participations therein or (b) if the Commitments denominated in
Canadian Dollars have been terminated, the outstanding Loans denominated in
Canadian Dollars, Canadian LOC Obligations and participations therein. The
unfunded Commitments of, and the outstanding Canadian Obligations held or deemed
held by, any Defaulting Lender shall be excluded for purposes of making a
determination of Required Canadian Lenders.

      "Required Financial Information" means, with respect to the last day of
any fiscal quarter of Airgas, (i) the financial statements of the Consolidated
Parties required to be delivered pursuant to Section 7.1(a) or (b) for the
fiscal period or quarter ending as of such date, and (ii) the certificate of an
Executive Officer of Airgas required by Section 7.1(c) to be delivered with the
financial statements described in clause (i) above.

      "Required Lenders" means, at any time, Lenders holding in the aggregate
more than 50% of (a) the unfunded Commitments and the outstanding Loans (other
than Competitive U.S. Loans at any time prior to the termination of the U.S.
Revolving Commitments), LOC Obligations and participations therein or (b) if the
Commitments have been terminated, the outstanding Loans, LOC Obligations and
participations therein. The unfunded Commitments of, and the outstanding Credit
Party Obligations held or deemed held by, any Defaulting Lender shall be
excluded for purposes of making a determination of Required Lenders.

      "Required U.S. Lenders" means, at any time, Lenders holding in the
aggregate more than 50% of (a) the unfunded Commitments denominated in U.S.
Dollars and the outstanding Loans denominated in U.S. Dollars (other than
Competitive U.S. Loans at any time prior to the termination of the U.S.
Revolving Commitments), U.S. LOC Obligations and participations therein or (b)
if the Commitments denominated in U.S. Dollars have been terminated, the
outstanding Loans denominated in U.S. Dollars, U.S. LOC Obligations and
participations therein. The unfunded Commitments of, and the outstanding Credit
Party Obligations held or deemed held by, any Defaulting Lender shall be
excluded for purposes of making a determination of Required U.S. Lenders.

      "Requirement of Law" means, as to any Person, the certificate of
incorporation and by-laws or other organizational or governing documents of such
Person, and any law, treaty, rule or regulation or determination of an
arbitrator or a court or other Governmental Authority, in each case applicable
to or binding upon such Person or any of its material property is subject.

      "Restricted Payment" means (i) any dividend or other distribution, direct
or indirect, on account of any shares of any class of stock of Airgas or any of
its Subsidiaries, now or hereafter outstanding, (ii) any redemption (including,
without limitation, in connection with any Redemption Obligation), retirement,
sinking fund or similar payment, purchase or other acquisition for value, direct
or indirect, of any shares of any class of stock of Airgas or any of its
Subsidiaries, now or hereafter outstanding or (iii) any payment made to retire,
or to obtain the surrender of, any outstanding warrants, options or other rights
to acquire

                                       22

<PAGE>

shares of any class of stock of Airgas or any of its Subsidiaries, now or
hereafter outstanding. With respect to any Restricted Payment that is permitted
by this Credit Agreement to be made (i) after demonstrating compliance with the
financial covenants set forth in Section 7.10 on a Pro Forma Basis and (ii) so
long as no Default or Event of Default exists at the time of such Restricted
Payment or would result upon giving effect thereto, then solely for purposes of
Section 8.6(iii), the amount of such Restricted Payment shall be deemed reduced
(to an amount not less than zero) by an amount equal to the net cash proceeds
received by Airgas from any issuances of Capital Stock occurring after the
Closing Date.

      "Restricted Subsidiary" means (i) any wholly-owned Subsidiary of Airgas
(other than the Receivables Subsidiary) and (ii) any other Subsidiary of Airgas
that, at the option of Airgas, executes a Joinder Agreement in accordance with
Section 7.12.

      "S&P" means Standard & Poor's Ratings Services Group, a division of The
McGraw-Hill Companies, Inc., or any successor or assignee of the business of
such division in the business of rating securities.

       "Sale and Leaseback Transaction" means any arrangement pursuant to which
any Consolidated Party, directly or indirectly, becomes liable as lessee,
guarantor or other surety with respect to any lease, whether an Operating Lease
or a Capital Lease, of any Property (a) which such Consolidated Party has sold
or transferred (or is to sell or transfer) to a Person which is not a
Consolidated Party or (b) which such Consolidated Party intends to use for
substantially the same purpose as any other Property which has been sold or
transferred (or is to be sold or transferred) by such Consolidated Party to
another Person which is not a Consolidated Party in connection with such lease.

      "Securitization Assets" means any accounts or trade receivable, notes
receivable, rights to future lease payments or residuals or capital, or any
other asset or a portion or interest therein that is or could be securitized,
together with certain related property relating thereto and the right to
collections thereon, which are subject to a Securitization Transaction.

      "Securitization Transaction" means any transaction or series of
transactions pursuant to which a Person may sell, convey or otherwise transfer
to (i) a Subsidiary or Affiliate, or (ii) any other Person, or may grant a
security interest in, any Securitization Assets (or any portion or interest
therein) of such Person, including, without limitation, any sale, lease, whole
loan sale, secured loan or other transfer.

      "Single Employer Plan" means any Plan which is covered by Title IV of
ERISA, but which is not a Multiemployer Plan.

      "Subordinated Debt" means (i) any Indebtedness evidenced and governed by
the Subordinated Note Indentures and the Subordinated Notes, including any
guarantees thereof by any Credit Party, and (ii) any other Indebtedness of
Airgas, including any guarantees thereof by any Credit Party that is
contractually subordinated to the Credit Party Obligations.

      "Subordinated Note" means any one of (i) the 9.125% notes due 2011 or (ii)
the 6.25% notes due 2014, issued by Airgas in favor of the Subordinated
Noteholders pursuant to the respective Subordinated Note Indenture, as such
Subordinated Notes may be amended, modified, exchanged as contemplated by the
Subordinated Note Indentures, restated or supplemented and in effect from time
to time in accordance with the terms hereof.

      "Subordinated Note Indentures" means (i) the Indenture, dated as of July
30, 2001, and (ii) the Indenture, dated as of March 8, 2004, by and among
Airgas, the guarantors named therein and The Bank of

                                       23

<PAGE>

New York, as trustee, as each Subordinated Note Indenture may be amended,
modified, restated or supplemented and in effect from time to time in accordance
with the terms hereof.

      "Subordinated Noteholder" means any one of the holders from time to time
of the Subordinated Notes.

      "Subsidiary" means, as to any Person, (a) any corporation more than 50% of
whose stock of any class or classes having by the terms thereof ordinary voting
power to elect a majority of the directors of such corporation (irrespective of
whether or not at the time, any class or classes of such corporation shall have
or might have voting power by reason of the happening of any contingency) is at
the time owned by such Person directly or indirectly through Subsidiaries, and
(b) any partnership, association, joint venture or other entity in which such
Person directly or indirectly through Subsidiaries has more than 50% equity
interest at any time. For purposes of clarification only, the parties hereto
hereby acknowledge and agree that, notwithstanding the fact that National
Welders may be required, in accordance with GAAP, to be consolidated (on the
consolidation basis) with Airgas, the term "Subsidiary" as used in this
Agreement shall not include National Welders unless and until such time as
National Welders would constitute a "Subsidiary" within the meaning of the
immediately preceding sentence.

      "Synthetic Lease" means any synthetic lease, tax retention operating
lease, off-balance sheet loan or similar off-balance sheet financing product
where such transaction is considered borrowed money indebtedness for tax
purposes but is classified as an Operating Lease under GAAP.

       "Termination Date" means January 14, 2010.

      "Termination Event" means (i) with respect to any Plan, the occurrence of
a Reportable Event or the substantial cessation of operations (within the
meaning of Section 4062(e) of ERISA); (ii) the withdrawal by Airgas, any
Subsidiary of Airgas or any ERISA Affiliate from a Multiple Employer Plan during
a plan year in which it was a substantial employer (as such term is defined in
Section 4001(a)(2) of ERISA), or the termination of a Multiple Employer Plan;
(iii) the distribution of a notice of intent to terminate or the actual
termination of a Plan pursuant to Section 4041(a)(2) or 4041A of ERISA; (iv) the
institution of proceedings to terminate or the actual termination of a Plan by
the PBGC under Section 4042 of ERISA; (v) any event or condition which might
constitute grounds under Section 4042 of ERISA for the termination of, or the
appointment of a trustee to administer, any Plan; or (vi) the complete or
partial withdrawal of any Consolidated Party or any ERISA Affiliate from a
Multiemployer Plan.

      "U.S. Agent" shall have the meaning assigned to such term in the heading
hereof, together with any successors or assigns.

      "U.S. Agent's Fee Letter" means that certain letter agreement, dated as of
December 14, 2004, between the U.S. Agent and Airgas, as amended, modified,
supplemented or replaced from time to time.

      "U.S. Base Rate" means for any day a fluctuating rate per annum equal to
the higher of (a) the Federal Funds Rate plus 1/2 of 1% and (b) the rate of
interest in effect for such day as publicly announced from time to time by Bank
of America as its "prime rate." The "prime rate" is a rate set by Bank of
America based upon various factors including Bank of America's costs and desired
return, general economic conditions and other factors, and is used as a
reference point for pricing some loans, which may be priced at, above, or below
such announced rate. Any change in such rate announced by Bank of America shall
take effect at the opening of business on the day specified in the public
announcement of such change.

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<PAGE>

      "U.S. Base Rate Loan" means any Loan bearing interest at a rate determined
by reference to the U.S. Base Rate.

      "U.S. Credit Parties" shall mean a collective reference to Airgas and the
U.S. Subsidiary Guarantors, and "U.S. Credit Party" shall mean any one of them.

      "U.S. Dollars" and "$" means dollars in lawful currency of the United
States.

      "U.S. Issuing Lender" means, with respect to a particular U.S. Letter of
Credit, (i) The Bank of New York, in its capacity as issuer of such U.S. Letter
of Credit or (ii) such other U.S. Revolving Lender selected by Airgas (upon
notice to the U.S. Agent) from time to time to issue such U.S. Letter of Credit.

      "U.S. Letter of Credit" means (i) any standby or trade letter of credit
issued by the U.S. Issuing Lender for the account of Airgas in accordance with
the terms of Section 2.3 and (ii) any Existing U.S. Letter of Credit.

      "U.S. LOC Commitment" means the commitment of the U.S. Issuing Lender to
issue U.S. Letters of Credit in an aggregate face amount at any time outstanding
(together with the amounts of any unreimbursed drawings thereon) of up to the
U.S. LOC Committed Amount.

      "U.S. LOC Committed Amount" shall have the meaning assigned to such term
in Section 2.3.

      "U.S. LOC Documents" means, with respect to any U.S. Letter of Credit,
such U.S. Letter of Credit, any amendments thereto, any documents delivered in
connection therewith, any application therefor, and any agreements, instruments,
guarantees or other documents (whether general in application or applicable only
to such U.S. Letter of Credit) governing or providing for (i) the rights and
obligations of the parties concerned or at risk or (ii) any collateral security
for such obligations.

      "U.S. LOC Obligations" means, at any time, the sum of (i) the maximum
amount which is, or at any time thereafter may become, available to be drawn
under U.S. Letters of Credit then outstanding, assuming compliance with all
requirements for drawings referred to in such U.S. Letters of Credit plus (ii)
the aggregate amount of all drawings under U.S. Letters of Credit honored by the
U.S. Issuing Lender but not theretofore reimbursed. For all purposes of this
Credit Agreement, if on any date of determination a U.S. Letter of Credit has
expired by its terms but any amount may still be drawn thereunder by reason of
the operation of Rule 3.14 of the ISP, such Letter of Credit shall be deemed to
be "outstanding" in the amount so remaining available to be drawn

      "U.S. Revolving Commitment" means, with respect to each U.S. Revolving
Lender, the commitment of such U.S. Revolving Lender in an aggregate principal
amount at any time outstanding of up to such U.S. Revolving Lender's U.S.
Revolving Commitment Percentage of the U.S. Revolving Committed Amount, (i) to
make U.S. Revolving Loans in accordance with the provisions of Section 2.1(a),
(ii) to purchase participation interests in U.S. Letters of Credit in accordance
with the provisions of Section 2.3(c), (iii) to purchase participation interests
in the U.S. Swingline Loans in accordance with the provisions of Section
2.4(b)(iii).

      "U.S. Revolving Commitment Percentage" means, for any U.S. Revolving
Lender, the percentage identified as its U.S. Revolving Commitment Percentage on
Schedule 2.1(a), as such percentage may be modified in connection with any
increase in the U.S. Revolving Committed Amount pursuant to Section 4.4(b) or
any assignment made in accordance with the provisions of Section 11.3.

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<PAGE>

      "U.S. Revolving Committed Amount" shall have the meaning assigned to such
term in Section 2.1(a).

      "U.S. Revolving Lenders" means (i) those Lenders that have U.S. Revolving
Commitments and are identified as Lenders on the signature pages attached hereto
and (ii) any Person which becomes a U.S. Revolving Lender by executing a New
Commitment Agreement pursuant to Section 4.4(b), together with their successors
and assigns.

      "U.S. Revolving Loans" shall have the meaning assigned to such term in
Section 2.1(a).

      "U.S. Subsidiary Guarantors" means each of the Persons identified as a
"U.S. Subsidiary Guarantor" on the signature pages hereto and each Person which
may hereafter guaranty the Credit Party Obligations by its execution of a
Joinder Agreement pursuant to Section 7.12, together with their successors and
permitted assigns, and "U.S. Subsidiary Guarantor" means any one of them.

      "U.S. Swingline Commitment" means the commitment of the U.S. Swingline
Lender to make U.S. Swingline Loans in an aggregate principal amount at any time
outstanding of up to the U.S. Swingline Committed Amount.

      "U.S. Swingline Committed Amount" shall have the meaning assigned to such
term in Section 2.4(a).

      "U.S. Swingline Lender" means Bank of America.

      "U.S. Swingline Loan" means a loan made pursuant to and defined in Section
2.4(a).

      "U.S. Term Lenders" means (i) those Lenders that have U.S. Term Loan
Commitments and are identified as Lenders on the signature pages attached hereto
and (ii) any Person which becomes a U.S. Term Lender by executing a New
Commitment Agreement pursuant to Section 4.4(b), together with their successors
and assigns.

      "U.S. Term Loan" shall have the meaning assigned to such term in Section
2.5(a).

      "U.S. Term Loan Commitment" means, with respect to each U.S. Term Lender,
the commitment of such U.S. Term Lender to make U.S. Term Loans in accordance
with Section 2.5(a) in an aggregate principal amount equal to the amount
specified on Schedule 2.1(a) or in the New Commitment Agreement executed by such
U.S. Term Lender.

      "U.S. Term Loan Committed Amount" shall have the meaning assigned to such
term in Section 2.5(a).

      "U.S. Term Loan Percentage" means, for any U.S. Term Lender, the
percentage obtained by dividing (i) the principal amount of the U.S. Term Loan
Commitment of such U.S. Term Lender by (ii) the U.S. Term Loan Committed Amount,
as such percentage may be modified in connection with any assignment made in
accordance with the provisions of Section 11.3 or as the result of an increase
in the amount of the U.S. Term Loan Committed Amount pursuant to Section 4.4(b).

      "U.S. Unused Fee" shall have the meaning assigned to such term in Section
4.5(a)(i).

      "Voting Stock" means, with respect to any Person, Capital Stock issued by
such Person the holders of which are ordinarily, in the absence of
contingencies, entitled to vote for the election of directors (or

                                       26

<PAGE>

persons performing similar functions) of such Person, even though the right so
to vote has been suspended by the happening of such a contingency.

      1.2 COMPUTATION OF TIME PERIODS.

      For purposes of computation of periods of time hereunder, the word "from"
means "from and including" and the words "to" and "until" each mean "to but
excluding."

      1.3 ACCOUNTING TERMS.

      Except as otherwise expressly provided herein, all accounting terms used
herein shall be interpreted, and all financial statements and certificates and
reports as to financial matters required to be delivered to the Lenders
hereunder shall be prepared, in accordance with GAAP applied on a consistent
basis; provided, however, that calculations of the implied principal component
of all obligations under any Synthetic Lease or the implied interest component
of any rent paid under any Synthetic Lease shall be made by Airgas in accordance
with accepted financial practice and consistent with the terms of such Synthetic
Lease. All calculations made for the purposes of determining compliance with
this Credit Agreement shall (except as otherwise expressly provided herein) be
made by application of GAAP applied on a basis consistent with the most recent
annual or quarterly financial statements delivered pursuant to Section 7.1
hereof (or, prior to the delivery of the first financial statements pursuant to
Section 7.1 hereof, consistent with the financial statements as at March 31,
2004); provided, however, if (a) Airgas shall object to determining such
compliance on such basis at the time of delivery of such financial statements
due to any change in GAAP or the rules promulgated with respect thereto or (b)
the Agents or the Required Lenders shall so object in writing within 30 days
after delivery of such financial statements, then such calculations shall be
made on a basis consistent with the most recent financial statements delivered
by Airgas to the Lenders as to which no such objection shall have been made.

      Notwithstanding the above, the parties hereto acknowledge and agree that,
for purposes of all calculations made under the financial covenants set forth in
Section 7.10 (including without limitation for purposes of the definition of
"Pro Forma Basis" set forth in Section 1.1), (i) after consummation of any Asset
Disposition (A) income statement items (whether positive or negative) and
capital expenditures attributable to the Property disposed of shall be excluded
to the extent relating to any period occurring prior to the date of such
transaction and (B) Indebtedness which is retired shall be excluded and deemed
to have been retired as of the first day of the applicable period and (ii) after
consummation of any Acquisition (A) income statement items (whether positive or
negative) and capital expenditures attributable to the Person or Property
acquired shall, to the extent not otherwise included in such income statement
items for the Consolidated Parties in accordance with GAAP or in accordance with
any defined terms set forth in Section 1.1, be included to the extent relating
to any period applicable in such calculations, (B) to the extent not retired in
connection with such Acquisition, Indebtedness of the Person or Property
acquired shall be deemed to have been incurred as of the first day of the
applicable period and (C) pro forma adjustments may be included to the extent
that such adjustments meet the requirements of Regulation S-X under the
Securities Act of 1933, as amended, and all other accounting rules and
regulations of the SEC promulgated thereunder.

                                   ARTICLE II

                          U.S. DOLLAR CREDIT FACILITIES

      2.1 U.S. REVOLVING LOANS.

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      (a) U.S. Revolving Commitment. Subject to the terms and conditions hereof
and in reliance upon the representations and warranties set forth herein, each
U.S. Revolving Lender severally agrees to make available to Airgas such U.S.
Revolving Lender's U.S. Revolving Commitment Percentage of revolving credit
loans requested by Airgas in U.S. Dollars ("U.S. Revolving Loans") from time to
time from the Closing Date until the Termination Date, or such earlier date as
the U.S. Revolving Commitments shall have been terminated as provided herein for
the purposes hereinafter set forth; provided, however, that the aggregate
principal amount of outstanding U.S. Revolving Loans shall not exceed THREE
HUNDRED EIGHT MILLION U.S. DOLLARS ($308,000,000) (as such aggregate maximum
amount may be increased or reduced from time to time as provided in Section 4.4,
the "U.S. Revolving Committed Amount"); provided, further, (i) with regard to
each U.S. Revolving Lender individually, such U.S. Revolving Lender's
outstanding U.S. Revolving Loans shall not exceed such U.S. Revolving Lender's
U.S. Revolving Commitment Percentage of the U.S. Revolving Committed Amount and
(ii) with regard to the U.S. Revolving Lenders collectively, the aggregate
principal amount of outstanding U.S. Revolving Loans plus the aggregate
principal amount of outstanding Competitive U.S. Loans plus the aggregate
principal amount of outstanding U.S. Swingline Loans plus U.S. LOC Obligations
outstanding shall not exceed the U.S. Revolving Committed Amount. U.S. Revolving
Loans may consist of U.S. Base Rate Loans or Eurodollar Loans, or a combination
thereof, as Airgas may request, and may be repaid and reborrowed in accordance
with the provisions hereof; provided, however, that no more than 11 Eurodollar
Loans shall be outstanding hereunder at any time. For purposes hereof,
Eurodollar Loans with different Interest Periods shall be considered as separate
Eurodollar Loans, even if they begin on the same date, although borrowings,
extensions and conversions may, in accordance with the provisions hereof, be
combined at the end of existing Interest Periods to constitute a new Eurodollar
Loan with a single Interest Period. U.S. Revolving Loans hereunder may be repaid
and reborrowed in accordance with the provisions hereof.

      (b) U.S. Revolving Loan Borrowings.

            (i) Notice of Borrowing. Airgas (by its duly authorized officers or
      representatives) shall request a U.S. Revolving Loan borrowing by written
      notice (or telephone notice promptly confirmed in writing) to the U.S.
      Agent not later than 11:00 A.M. (Charlotte, North Carolina time) on the
      Business Day of the requested borrowing in the case of U.S. Base Rate
      Loans, and on the third Business Day prior to the date of the requested
      borrowing in the case of Eurodollar Loans. Each such request for borrowing
      shall be irrevocable and shall specify (A) that a U.S. Revolving Loan is
      requested, (B) the date of the requested borrowing (which shall be a
      Business Day), (C) the aggregate principal amount to be borrowed, and (D)
      whether the borrowing shall be comprised of U.S. Base Rate Loans,
      Eurodollar Loans or a combination thereof, and if Eurodollar Loans are
      requested, the Interest Period(s) therefor. If Airgas shall fail to
      specify in any such Notice of Borrowing (I) an applicable Interest Period
      in the case of a Eurodollar Loan, then such notice shall be deemed to be a
      request for an Interest Period of one month, or (II) the type of U.S.
      Revolving Loan requested, then such notice shall be deemed to be a request
      for a U.S. Base Rate Loan hereunder. The U.S. Agent shall give notice to
      each U.S. Revolving Lender promptly upon receipt of each Notice of
      Borrowing pursuant to this Section 2.1(b)(i), specifying the contents
      thereof and each such U.S. Revolving Lender's share of any borrowing to be
      made pursuant thereto.

            (ii) Minimum Amounts. Each Eurodollar Loan or U.S. Base Rate Loan
      that is a U.S. Revolving Loan shall be in a minimum aggregate principal
      amount of $5,000,000 and integral multiples of $1,000,000 in excess
      thereof (or the remaining amount of the U.S. Revolving Committed Amount,
      if less).

            (iii) Advances. Each U.S. Revolving Lender will make its U.S.
      Revolving Commitment Percentage of each U.S. Revolving Loan borrowing
      available to the U.S. Agent for the account of Airgas by 1:00 P.M.
      (Charlotte, North Carolina time) on the date specified in the

                                       28

<PAGE>

      applicable Notice of Borrowing in U.S. Dollars and in funds immediately
       available to the U.S. Agent. Such borrowing will then be made available to
      Airgas by the U.S. Agent in like funds as received by the U.S. Agent by
      (A) crediting the account of Airgas on the books of the U.S. Agent with
      the amount of such funds or (B) wire transfer of such funds, in each case
      in accordance with instructions provided to (and reasonably acceptable to)
      the U.S. Agent by Airgas.

      (c) Repayment. Airgas promises to pay the principal amount of all U.S.
Revolving Loans in full on the Termination Date.

      (d) Interest. Subject to the provisions of Section 4.1,

            (i) U.S. Base Rate Loans. During such periods as U.S. Revolving
      Loans shall be comprised in whole or in part of U.S. Base Rate Loans, such
      U.S. Base Rate Loans shall bear interest at a per annum rate equal to the
      U.S. Base Rate plus the Applicable Percentage; and

            (ii) Eurodollar Loans. During such periods as U.S. Revolving Loans
      shall be comprised in whole or in part of Eurodollar Loans, such
      Eurodollar Loans shall bear interest at a per annum rate equal to the
      Eurodollar Rate plus the Applicable Percentage.

Airgas promises to pay interest on U.S. Revolving Loans in arrears on each
applicable Interest Payment Date (or at such other times as may be specified
herein).

      2.2 COMPETITIVE U.S. LOAN SUBFACILITY.

      (a) Competitive U.S. Loans. Subject to the terms and conditions and
relying upon the representations and warranties herein set forth, Airgas may,
from time to time from the Closing Date until the Termination Date, request and
each U.S. Revolving Lender may, in its sole discretion, agree to make,
Competitive U.S. Loans in U.S. Dollars to Airgas; provided, however, that (i)
the aggregate principal amount of outstanding Competitive U.S. Loans shall not
at any time exceed FIFTY MILLION U.S. DOLLARS ($50,000,000) and (ii) the sum of
the aggregate principal amount of outstanding U.S. Revolving Loans plus the
aggregate principal amount of outstanding Competitive U.S. Loans plus the
aggregate principal amount of outstanding U.S. Swingline Loans plus U.S. LOC
Obligations outstanding shall not at any time exceed the U.S. Revolving
Committed Amount. Each Competitive U.S. Loan shall be not less than $1,000,000
in the aggregate and integral multiples of $500,000 in excess thereof (or the
remaining portion of the U.S. Revolving Committed Amount, if less).

      (b) Competitive U.S. Bid Requests. Airgas (by its duly authorized officers
or representatives) may solicit by making a written, telefax or telephonic
request to all of the U.S. Revolving Lenders for a Competitive U.S. Loan. To be
effective, such request must be received by each of the U.S. Revolving Lenders
by such time as determined by each such U.S. Revolving Lender in accordance with
such U.S. Revolving Lender's customary practices (in any event not to be later
than 12:00 NOON (Charlotte, North Carolina time)) on the date of the requested
borrowing and must specify (i) that a Competitive U.S. Loan is requested, (ii)
the amount of such Competitive U.S. Loan and (iii) the Interest Period for such
Competitive U.S. Loan.

      (c) Competitive U.S. Bids. Upon receipt of a request by Airgas for a
Competitive U.S. Loan, each U.S. Revolving Lender may, in its sole discretion,
submit a Competitive U.S. Bid containing an offer to make a Competitive U.S.
Loan in an amount up to the amount specified in the related request for
Competitive U.S. Loans. Such Competitive U.S. Bid shall be submitted to Airgas
by telephone notice by such time as determined by such U.S. Revolving Lender in
accordance with such U.S. Revolving Lender's customary practices (in any event
not to be later than 1:00 P.M. (Charlotte, North Carolina time)) on the

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date of the requested Competitive U.S. Loan. Competitive U.S. Bids so made shall
be irrevocable. Each Competitive U.S. Bid shall specify (i) the date of the
proposed Competitive U.S. Loan, (ii) the maximum and minimum principal amounts
of the Competitive U.S. Loan for which such offer is being made (which may be
for all or a part of (but not more than) the amount requested by Airgas), (iii)
the applicable Competitive U.S. Bid Rate, and (iv) the applicable Interest
Period.

       (d) Acceptance of Competitive U.S. Bids. Airgas (by its duly authorized
officers or representatives) may, before such time as determined by the
applicable U.S. Revolving Lender in accordance with such U.S. Revolving Lender's
customary practices (in any event until 2:00 P.M. (Charlotte, North Carolina
time)) on the date of the requested Competitive U.S. Loan, accept any
Competitive U.S. Bid by giving the applicable U.S. Revolving Lender and the U.S.
Agent telephone notice (immediately confirmed in writing) of (i) the U.S.
Revolving Lender or U.S. Revolving Lenders whose Competitive U.S. Bid(s) is/are
accepted, (ii) the principal amount of the Competitive U.S. Bid(s) so accepted
and (iii) the Interest Period of the Competitive U.S. Bid(s) so accepted. Airgas
may accept any Competitive U.S. Bid in whole or in part; provided, however, that
(a) the principal amount of each Competitive U.S. Loan may not exceed the
maximum amount offered in the Competitive U.S. Bid and may not be less than the
minimum amount offered in the Competitive U.S. Bid, (b) the principal amount of
each Competitive U.S. Loan may not exceed the total amount requested pursuant to
subsection (a) above, (c) Airgas shall not accept a Competitive U.S. Bid made at
a particular Competitive U.S. Bid Rate if it has decided to reject a Competitive
U.S. Bid made at a lower Competitive U.S. Bid Rate and (d) if Airgas shall
accept a Competitive U.S. Bid or Bids made at a particular Competitive U.S. Bid
Rate but the amount of such Competitive U.S. Bid or Bids shall cause the total
amount of Competitive U.S. Bids to be accepted by Airgas to exceed the total
amount requested pursuant to subsection (a) above, then Airgas shall accept a
portion of such Competitive U.S. Bid or Bids in an amount equal to the total
amount requested pursuant to subsection (a) above less the amount of other
Competitive U.S. Bids accepted with respect to such request, which acceptance,
in the case of multiple Competitive U.S. Bids at the same Competitive U.S. Bid
Rate, shall be made pro rata in accordance with each such Competitive U.S. Bid
at such Competitive U.S. Bid Rate. Competitive U.S. Bids so accepted by Airgas
shall be irrevocable.

      (e) Funding of Competitive U.S. Loans. Upon acceptance by Airgas pursuant
to subsection (d) above of all or a portion of any U.S. Revolving Lender's
Competitive U.S. Bid, such U.S. Revolving Lender shall, before such time as
determined by such U.S. Revolving Lender in accordance with such U.S. Revolving
Lender's customary practices, on the date of the requested Competitive U.S.
Loan, make such Competitive U.S. Loan available to the U.S. Agent in Federal or
other immediately available funds. Upon receipt of such funds, the U.S. Agent
will promptly make such funds available to Airgas at Account No. 3750353729
maintained at the offices of Bank of America; provided, however, that if on the
date of such Competitive U.S. Loan Airgas is to repay all or any part of an
outstanding U.S. Revolving Loan, then the U.S. Agent shall apply such
Competitive U.S. Loan first to such repayment, and only an amount equal to the
excess (if any) of the amount borrowed over the amount being repaid shall be
made available to Airgas.

      (f) Repayment of Competitive U.S. Loans. Airgas promises to repay to each
U.S. Revolving Lender which has made a Competitive U.S. Loan on the last day of
the Interest Period for such Competitive U.S. Loan the then unpaid principal
amount of such Competitive U.S. Loan. Airgas may not prepay any Competitive U.S.
Loan unless such prepayment is accompanied by payment of amounts specified in
Section 4.11.

      (g) Interest. Airgas promises to pay interest to each U.S. Revolving
Lender on the unpaid principal amount of each Competitive U.S. Loan of such U.S.
Revolving Lender from and including the date of such Competitive U.S. Loan to
but excluding the stated maturity date thereof, at the applicable Competitive
U.S. Bid Rate for such Competitive U.S. Loan (computed on the basis of the
actual number of

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days elapsed over a year of 360 days). Interest on Competitive U.S. Loans shall
be payable in arrears on each applicable Interest Payment Day (or at such other
times as may be specified herein).

      (h) Limitation on Number of Competitive U.S. Loans. Airgas shall not
request a Competitive U.S. Loan if, assuming the maximum amount of Competitive
U.S. Loans so requested is borrowed as of the date of such request, (i) the sum
of the aggregate principal amount of outstanding U.S. Revolving Loans plus the
aggregate principal amount of outstanding Competitive U.S. Loans plus the
aggregate principal amount of outstanding U.S. Swingline Loans plus U.S. LOC
Obligations outstanding would exceed the aggregate U.S. Revolving Committed
Amount and (ii) the sum of the aggregate principal amount of outstanding
Competitive U.S. Loans would exceed $50,000,000.

      (i) Change in Procedures for Requesting Competitive U.S. Loans. Airgas and
the U.S. Revolving Lenders hereby agree that, notwithstanding any other
provision to the contrary contained in this Credit Agreement, upon mutual
agreement of the U.S. Agent and Airgas and written notice by the U.S. Agent to
the U.S. Revolving Lenders, all further requests by Airgas for Competitive U.S.
Loans shall be made by Airgas to the U.S. Revolving Lenders through the U.S.
Agent in accordance with such procedures as shall be prescribed by the U.S.
Agent and acceptable to Airgas and each U.S. Revolving Lender.

      2.3 U.S. LETTER OF CREDIT SUBFACILITY.

      (a) Issuance. Subject to the terms and conditions hereof and of the U.S.
LOC Documents, if any, and any other terms and conditions which the U.S. Issuing
Lender may reasonably require, and in reliance upon the agreements of the Credit
Parties and U.S. Revolving Lenders set forth herein, the U.S. Revolving Lenders
will participate in the issuance by the U.S. Issuing Lender from time to time of
such U.S. Letters of Credit in U.S. Dollars from the Closing Date until the
Termination Date as Airgas may request, in a form acceptable to the U.S. Issuing
Lender; provided, however, that (i) the U.S. LOC Obligations outstanding shall
not at any time exceed SIXTY-FIVE MILLION U.S. DOLLARS ($65,000,000) (the "U.S.
LOC Committed Amount") and (ii) the sum of the aggregate principal amount of
outstanding U.S. Revolving Loans plus the aggregate principal amount of
outstanding Competitive U.S. Loans plus the aggregate principal amount of
outstanding U.S. Swingline Loans plus U.S. LOC Obligations outstanding shall not
at any time exceed the aggregate U.S. Revolving Committed Amount. No U.S. Letter
of Credit shall (x) except in the case where the U.S. Issuing Lender in respect
of a U.S. Letter of Credit has been replaced by a successor U.S. Issuing Lender,
have an original expiry date more than one year from the date of issuance
(provided that such U.S. Letter of Credit may contain customary "evergreen"
provisions pursuant to which the expiry date is automatically extended by a
specific time period unless the U.S. Issuing Lender gives notice of non-renewal
to the beneficiary of such U.S. Letter of Credit at least a specified time
period prior to the expiry date then in effect), or (y) as originally issued or
as extended, have an expiry date extending beyond the Termination Date. The U.S.
Issuing Lender shall be under no obligation to issue any U.S. Letter of Credit
if the issuance of such U.S. Letter of Credit would violate any applicable
Requirement of Law or any policy of the U.S. Issuing Lender. Each U.S. Letter of
Credit shall comply with the related U.S. LOC Documents. The issuance date of
each U.S. Letter of Credit shall be a Business Day.

      (b) Notice and Reports. The request for the issuance of a U.S. Letter of
Credit shall be submitted by Airgas (by its duly authorized officers or
representatives) to the U.S. Issuing Lender with a copy to the U.S. Agent at
least three (3) Business Days prior to the requested date of issuance. The U.S.
Issuing Lender will, at least quarterly and more frequently upon request,
disseminate to each of the U.S. Revolving Lenders a detailed report specifying
the U.S. Letters of Credit which are then issued and outstanding and any
activity with respect thereto which may have occurred since the date of the
prior report, and including therein, among other things, the beneficiary, the
face amount, expiry date as well as any payment or expirations which may have
occurred.

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      (c) Participation. Each U.S. Revolving Lender, upon issuance of a U.S.
Letter of Credit (or, in the case of each Existing U.S. Letter of Credit, on the
Closing Date), shall be deemed to have purchased without recourse a risk
participation from the U.S. Issuing Lender in such U.S. Letter of Credit and the
obligations arising thereunder, in each case in an amount equal to its pro rata
share of the obligations under such U.S. Letter of Credit (based on the
respective U.S. Revolving Commitment Percentages of the U.S. Revolving Lenders)
and shall absolutely, unconditionally and irrevocably assume, as primary obligor
and not as surety, and be obligated to pay to the U.S. Issuing Lender therefor
and discharge when due, its pro rata share of the obligations arising under such
U.S. Letter of Credit. Without limiting the scope and nature of each U.S.
Revolving Lender's participation in any U.S. Letter of Credit, to the extent
that the U.S. Issuing Lender has not been reimbursed as required hereunder or
under any such U.S. Letter of Credit, each such U.S. Revolving Lender shall pay
to the U.S. Issuing Lender its pro rata share of such unreimbursed drawing in
same day funds on the day of notification by the U.S. Issuing Lender of an
unreimbursed drawing pursuant to the provisions of subsection (d) hereof. The
obligation of each U.S. Revolving Lender to so reimburse the U.S. Issuing Lender
shall be absolute and unconditional and shall not be affected by the occurrence
of a Default, an Event of Default or any other occurrence or event. Any such
reimbursement shall not relieve or otherwise impair the obligation of Airgas to
reimburse the U.S. Issuing Lender under any U.S. Letter of Credit, together with
interest as hereinafter provided.

      (d) Reimbursement. In the event of any drawing under any U.S. Letter of
Credit, the U.S. Issuing Lender will promptly notify Airgas and the U.S. Agent.
Unless Airgas shall immediately notify the U.S. Issuing Lender that Airgas
intends to otherwise reimburse the U.S. Issuing Lender for such drawing, Airgas
shall be deemed to have requested that the U.S. Revolving Lenders make a U.S.
Revolving Loan in the amount of the drawing as provided in subsection (e) hereof
on the related U.S. Letter of Credit, the proceeds of which will be used to
satisfy the related reimbursement obligations. Airgas promises to reimburse the
U.S. Issuing Lender on the day of drawing under any U.S. Letter of Credit
(either with the proceeds of a U.S. Revolving Loan obtained hereunder or
otherwise) in same day funds. If Airgas shall fail to reimburse the U.S. Issuing
Lender as provided hereinabove, the unreimbursed amount of such drawing shall
bear interest at a per annum rate equal to the U.S. Base Rate plus the sum of
(i) the Applicable Percentage and (ii) two percent (2%). Airgas' reimbursement
obligations hereunder shall be absolute and unconditional under all
circumstances irrespective of any rights of setoff, counterclaim or defense to
payment Airgas may claim or have against the U.S. Issuing Lender, the U.S.
Agent, the U.S. Revolving Lenders, the beneficiary of the U.S. Letter of Credit
drawn upon or any other Person, including without limitation any defense based
on any failure of Airgas to receive consideration or the legality, validity,
regularity or unenforceability of the U.S. Letter of Credit. The U.S. Agent will
promptly notify the other U.S. Revolving Lenders of the amount of any
unreimbursed drawing under any U.S. Letter of Credit and each U.S. Revolving
Lender shall promptly pay to the U.S. Agent for the account of the U.S. Issuing
Lender in U.S. Dollars and in immediately available funds, the amount of such
U.S. Revolving Lender's pro rata share of such unreimbursed drawing. Such
payment shall be made on the day such notice is received by such U.S. Revolving
Lender from the U.S. Issuing Lender if such notice is received at or before 2:00
P.M. (Charlotte, North Carolina time) otherwise such payment shall be made at or
before 12:00 NOON (Charlotte, North Carolina time) on the Business Day next
succeeding the day such notice is received. If such U.S. Revolving Lender does
not pay such amount to the U.S. Issuing Lender in full upon such request, such
U.S. Revolving Lender shall, on demand, pay to the U.S. Agent for the account of
the U.S. Issuing Lender interest on the unpaid amount during the period from the
date of such drawing until such U.S. Revolving Lender pays such amount to the
U.S. Issuing Lender in full at a rate per annum equal to, if paid within two (2)
Business Days of the date that such U.S. Revolving Lender is required to make
payments of such amount pursuant to the preceding sentence, the Federal Funds
Rate and thereafter at a rate equal to the U.S. Base Rate. Each U.S. Revolving
Lender's obligation to make such payment to the U.S. Issuing Lender, and the
right of the U.S. Issuing Lender to receive the same, shall be absolute and
unconditional, shall not be affected by any circumstance whatsoever and without
regard to the termination of this Credit Agreement or the Commitments hereunder,
the existence of a Default or Event of Default or the acceleration of the

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obligations of Airgas hereunder and shall be made without any offset, abatement,
withholding or reduction whatsoever. Simultaneously with the making of each such
payment by a U.S. Revolving Lender to the U.S. Issuing Lender, such U.S.
Revolving Lender shall, automatically and without any further action on the part
of the U.S. Issuing Lender or such U.S. Revolving Lender, acquire a
participation in an amount equal to such payment (excluding the portion of such
payment constituting interest owing to the U.S. Issuing Lender) in the related
unreimbursed drawing portion of the U.S. LOC Obligation and in the interest
thereon and in the related U.S. LOC Documents, and shall have a claim against
Airgas with respect thereto.

      (e) Repayment with U.S. Revolving Loans. On any day on which Airgas shall
have requested, or shall be deemed to have requested, a U.S. Revolving Loan
advance to reimburse a drawing under a U.S. Letter of Credit, the U.S. Agent
shall give notice to the U.S. Revolving Lenders that a U.S. Revolving Loan has
been requested or deemed requested by Airgas to be made in connection with a
drawing under a U.S. Letter of Credit, in which case a U.S. Revolving Loan
advance comprised of U.S. Base Rate Loans (or Eurodollar Loans to the extent
Airgas has complied with the procedures of Section 2.1(b)(i) with respect
thereto) shall be immediately made to Airgas by all U.S. Revolving Lenders
(notwithstanding any termination of the Commitments pursuant to Section 9.2) pro
rata based on the respective U.S. Revolving Commitment Percentages of the U.S.
Revolving Lenders (determined before giving effect to any termination of the
Commitments pursuant to Section 9.2) and the proceeds thereof shall be paid
directly to the U.S. Issuing Lender for application to the respective U.S. LOC
Obligations. Each U.S. Revolving Lender hereby irrevocably agrees to make its
pro rata share of each such U.S. Revolving Loan immediately upon any such
request or deemed request in the amount, in the manner and on the date specified
in the preceding sentence notwithstanding (i) the amount of such borrowing may
not comply with the minimum amount for advances of U.S. Revolving Loans
otherwise required hereunder, (ii) whether any conditions specified in Section
5.2 are then satisfied, (iii) whether a Default or an Event of Default then
exists, (iv) failure for any such request or deemed request for U.S. Revolving
Loan to be made by the time otherwise required hereunder, (v) whether the date
of such borrowing is a date on which U.S. Revolving Loans are otherwise
permitted to be made hereunder or (vi) any termination of the Commitments
relating thereto immediately prior to or contemporaneously with such borrowing.
In the event that any U.S. Revolving Loan cannot for any reason be made on the
date otherwise required above (including, without limitation, as a result of the
commencement of a proceeding under the Bankruptcy Code with respect to Airgas),
then each U.S. Revolving Lender hereby agrees that it shall forthwith purchase
(as of the date such borrowing would otherwise have occurred, but adjusted for
any payments received from Airgas on or after such date and prior to such
purchase) from the U.S. Issuing Lender such participation in the outstanding
U.S. LOC Obligations as shall be necessary to cause each U.S. Revolving Lender
to share in such U.S. LOC Obligations ratably (based upon the respective U.S.
Revolving Commitment Percentages of the U.S. Revolving Lenders (determined
before giving effect to any termination of the Commitments pursuant to Section
9.2)), provided that at the time any purchase of participation pursuant to this
sentence is actually made, the purchasing U.S. Revolving Lender shall be
required to pay to the U.S. Issuing Lender, to the extent not paid to the Issuer
by Airgas in accordance with the terms of subsection (d) hereof, interest on the
principal amount of participation purchased for each day from and including the
day upon which such borrowing would otherwise have occurred to but excluding the
date of payment for such participation, at the rate equal to, if paid within two
(2) Business Days of the date of the U.S. Revolving Loan advance, the Federal
Funds Rate, and thereafter at a rate equal to the U.S. Base Rate.

      (f) Designation of Subsidiaries as Account Parties. Notwithstanding
anything to the contrary set forth in this Credit Agreement, including without
limitation Section 2.3(a) hereof, a U.S. Letter of Credit issued hereunder may
contain a statement to the effect that such U.S. Letter of Credit is issued for
the account of a Subsidiary of Airgas, provided that notwithstanding such
statement, Airgas shall be the actual account party for all purposes of this
Credit Agreement for such U.S. Letter of Credit and such statement shall not
affect Airgas' reimbursement obligations hereunder with respect to such U.S.
Letter of Credit.

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<PAGE>

      (g) Renewal, Extension. The renewal or extension of any U.S. Letter of
Credit shall, for purposes hereof, be treated in all respects the same as the
issuance of a new U.S. Letter of Credit hereunder.

      (h) Applicability of ISP and UCP. Unless otherwise expressly agreed by the
U.S. Issuing Lender and Airgas when a U.S. Letter of Credit is issued (including
any such agreement applicable to an Existing U.S. Letter of Credit), (i) the
rules of the ISP shall apply to each standby U.S. Letter of Credit, and (ii) the
rules of the Uniform Customs and Practice for Documentary Credits, as most
recently published by the International Chamber of Commerce at the time of
issuance shall apply to each trade U.S. Letter of Credit.

      (i) Indemnification; Nature of U.S. Issuing Lender's Duties.

            (i) Airgas agrees to indemnify and hold harmless the U.S. Issuing
      Lender, each other U.S. Revolving Lender, the U.S. Agent and each of their
      respective officers, directors, affiliates, employees or agents (the
      "Indemnitees") from and against any and all claims and damages, losses,
      liabilities, costs and expenses which the Indemnitees may incur (or which
      may be claimed against any Indemnitee) by any Person by reason of or in
      connection with the issuance or transfer of or payment or failure to pay
      under any U.S. Letter of Credit; provided that Airgas shall not be
      required to indemnify the Indemnitees for any claims, damages, losses,
      liabilities, costs or expenses to the extent, but only to the extent, (A)
      caused by the willful misconduct or gross negligence of any Indemnitee in
      determining whether a request presented under any U.S. Letter of Credit
      complied with the terms of such U.S. Letter of Credit or (B) caused by the
      U.S. Issuing Lender's failure to pay under any U.S. Letter of Credit after
      the presentation to it of a request strictly complying with the terms and
      conditions of such U.S. Letter of Credit (unless such payment is
      prohibited by any law, regulation, court order or decree).

            (ii) Airgas agrees, as between Airgas and the U.S. Issuing Lender,
      Airgas shall assume all risks of the acts, omissions or misuse of any U.S.
      Letter of Credit by the beneficiary thereof.

            (iii) The U.S. Issuing Lender shall not, in any way, be liable for
       any failure by the U.S. Issuing Lender or anyone else to pay any drawing
      under any U.S. Letter of Credit as a result of any Government Acts or any
      other cause beyond the control of the U.S. Issuing Lender.

            (iv) Nothing in this subsection (i) is intended to limit the
      reimbursement obligations of Airgas contained in subsection (d) above. The
      obligations of Airgas under this subsection (i) shall survive the
      termination of this Credit Agreement. No act or omissions of any current
      or prior beneficiary of a U.S. Letter of Credit shall in any way affect or
      impair the rights of the U.S. Issuing Lender to enforce any right, power
      or benefit under this Credit Agreement.

            (v) Notwithstanding anything to the contrary contained in this
      subsection (i), Airgas shall have no obligation to indemnify the U.S.
      Issuing Lender in respect of any liability incurred by the U.S. Issuing
      Lender (A) arising out of the gross negligence or willful misconduct of
      the U.S. Issuing Lender, or (B) caused by the U.S. Issuing Lender's
      failure to pay under any U.S. Letter of Credit after presentation to it of
      a request strictly complying with the terms and conditions of such U.S.
      Letter of Credit, as determined by a court of competent jurisdiction,
      unless such payment is prohibited by any law, regulation, court order or
      decree.

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<PAGE>

      (j) Responsibility of U.S. Issuing Lender. It is expressly understood and
agreed that the obligations of the U.S. Issuing Lender hereunder to the U.S.
Revolving Lenders are only those expressly set forth in this Credit Agreement
and that the U.S. Issuing Lender shall be entitled to assume that the conditions
precedent set forth in Section 5.2 have been satisfied unless it shall have
acquired actual knowledge that any such condition precedent has not been
satisfied; provided, however, that nothing set forth in this Section 2.3 shall
be deemed to prejudice the right of any U.S. Revolving Lender to recover from
the U.S. Issuing Lender any amounts made available by such U.S. Revolving Lender
to the U.S. Issuing Lender pursuant to this Section 2.3 in the event that it is
determined by a court of competent jurisdiction that the payment with respect to
a U.S. Letter of Credit constituted gross negligence or willful misconduct on
the part of the U.S. Issuing Lender.

      (k) Conflict with U.S. LOC Documents. In the event of any conflict between
this Credit Agreement and any U.S. LOC Document (including any letter of credit
application), this Credit Agreement shall control.

      (l) Role of U.S. Agent. Airgas and each U.S. Issuing Lender agree to
provide the U.S. Agent with a copy of any notice or report otherwise required to
be furnished by such Person to any other Person pursuant to Sections 2.3(a),
2.3(b) or 2.3(d). Furthermore, all payments required to be made by any U.S.
Revolving Lender to a U.S. Issuing Lender pursuant to Section 2.3 shall be made
to the U.S. Agent, for the account of such U.S. Issuing Lender, and the U.S.
Agent shall distribute such payments to such U.S. Issuing Lender.

      2.4 U.S. SWINGLINE LOAN SUBFACILITY.

      (a) U.S. Swingline Commitment. Subject to the terms and conditions set
forth herein, the U.S. Swingline Lender agrees, in reliance upon the agreements
of the other U.S. Revolving Lenders set forth in this Section 2.4, the U.S.
Swingline Lender, in its individual capacity, agrees to make certain revolving
credit loans requested by Airgas in U.S. Dollars to Airgas (each a "U.S.
Swingline Loan" and, collectively, the "U.S. Swingline Loans") from time to time
from the Closing Date until the Termination Date for the purposes hereinafter
set forth; provided, however, (i) the aggregate principal amount of U.S.
Swingline Loans outstanding at any time shall not exceed THIRTY MILLION U.S.
DOLLARS ($30,000,000) (the "U.S. Swingline Committed Amount"), and (ii) the
aggregate principal amount of outstanding U.S. Revolving Loans plus the
aggregate principal amount of outstanding Competitive U.S. Loans plus the
aggregate principal amount of outstanding U.S. Swingline Loans plus U.S. LOC
Obligations outstanding shall not exceed the U.S. Revolving Committed Amount.
U.S. Swingline Loans hereunder shall be made as U.S. Base Rate Loans or Quoted
Rate U.S. Swingline Loans as Airgas may request in accordance with the
provisions of this Section 2.4, and may be repaid and reborrowed in accordance
with the provisions hereof.

      (b) U.S. Swingline Loan Advances.

            (i) Notices; Disbursement. Whenever Airgas desires a U.S. Swingline
      Loan advance hereunder its duly authorized officer or representative shall
      give written notice (or telephone notice promptly confirmed in writing) to
      the U.S. Swingline Lender not later than 2:00 P.M. (Charlotte, North
      Carolina time) on the Business Day of the requested U.S. Swingline Loan
      advance. Each such notice shall be irrevocable and shall specify (A) that
      a U.S. Swingline Loan advance is requested, (B) the date of the requested
      U.S. Swingline Loan advance (which shall be a Business Day) and (C) the
      principal amount of the U.S. Swingline Loan advance requested. Each U.S.
      Swingline Loan shall be made as a U.S. Base Rate Loan or a Quoted Rate
      U.S. Swingline Loan and shall have such maturity date as the U.S.
      Swingline Lender and Airgas shall agree upon receipt by the U.S. Swingline
      Lender of any such notice from Airgas. The U.S. Swingline Lender shall
      credit

                                       35

<PAGE>

      the funds requested to an Airgas account maintained with the Swingline
      Lender by 3:00 P.M. (Charlotte, North Carolina time) on the Business Day
      of the requested borrowing.

            (ii) Minimum Amounts. Each U.S. Swingline Loan advance shall be in a
      minimum principal amount of $100,000 and in integral multiples thereof (or
      the remaining amount of the U.S. Swingline Committed Amount, if less).

            (iii) Repayment of U.S. Swingline Loans. Airgas promises to pay the
      principal amount of all U.S. Swingline Loans on the earlier of (A) the
      maturity date agreed to by the U.S. Swingline Lender and Airgas with
      respect to such U.S. Swingline Loan (which maturity date shall not be a
      date more than thirty (30) days from the date of advance thereof) or (B)
      the Termination Date. The U.S. Swingline Lender may, at any time, in its
      sole discretion, by written notice to Airgas and the U.S. Revolving
      Lenders, demand repayment of its U.S. Swingline Loans by way of a U.S.
      Revolving Loan advance, in which case Airgas shall be deemed to have
      requested a U.S. Revolving Loan advance comprised solely of U.S. Base Rate
      Loans in the amount of such U.S. Swingline Loans; provided, however, that
      any such demand shall be deemed to have been given one Business Day prior
      to the Termination Date and on the date of the occurrence of any Event of
       Default described in Section 9.1 (or if such date is not a Business Day,
      the first Business Day succeeding such date) and upon acceleration of the
      indebtedness hereunder and the exercise of remedies in accordance with the
      provisions of Section 9.2. Each U.S. Revolving Lender hereby irrevocably
      agrees to make its pro rata share of each such U.S. Revolving Loan in the
      amount, in the manner and on the date specified in the preceding sentence
      notwithstanding (I) the amount of such borrowing may not comply with the
      minimum amount for advances of U.S. Revolving Loans otherwise required
      hereunder, (II) whether any conditions specified in Section 5.2 are then
      satisfied, (III) whether a Default or an Event of Default then exists,
      (IV) failure of any such request or deemed request for U.S. Revolving Loan
      to be made by the time otherwise required hereunder, (V) whether the date
      of such borrowing is a date on which U.S. Revolving Loans are otherwise
      permitted to be made hereunder or (VI) any termination of the Commitments
      relating thereto immediately prior to or contemporaneously with such
      borrowing. In the event that any U.S. Revolving Loan cannot for any reason
      be made on the date otherwise required above (including, without
      limitation, as a result of the commencement of a proceeding under the
      Bankruptcy Code with respect to Airgas), then each U.S. Revolving Lender
      hereby agrees that it shall forthwith purchase (as of the date such
      borrowing would otherwise have occurred, but adjusted for any payments
      received from Airgas on or after such date and prior to such purchase)
      from the U.S. Swingline Lender such participations in the outstanding U.S.
      Swingline Loans as shall be necessary to cause each U.S. Revolving Lender
      to share in such U.S. Swingline Loans ratably based upon its U.S.
      Revolving Commitment Percentage of the U.S. Revolving Committed Amount
      (determined before giving effect to any termination of the Commitments
      pursuant to Section 9.2), provided that (A) all interest payable on the
      U.S. Swingline Loans shall be for the account of the U.S. Swingline Lender
      until the date as of which the respective participation is purchased and
      (B) at the time any purchase of participations pursuant to this sentence
      is actually made, the purchasing U.S. Revolving Lender shall be required
      to pay to the U.S. Swingline Lender, to the extent not paid to the U.S.
      Swingline Lender by Airgas in accordance with the terms of subsection
      (c)(ii) hereof, interest on the principal amount of participation
      purchased for each day from and including the day upon which such
      borrowing would otherwise have occurred to but excluding the date of
      payment for such participation, at the rate equal to the Federal Funds
      Rate.

      (c) Interest on U.S. Swingline Loans. (i) Subject to the provisions of
Section 4.1, each U.S. Swingline Loan shall bear interest as follows:

                                       36

<PAGE>

            (A) U.S. Base Rate Loans. If such U.S. Swingline Loan is a U.S. Base
      Rate Loan, at a per annum rate (computed on the basis of the actual number
       of days elapsed over a year of 365 days) equal to the U.S. Base Rate plus
      the Applicable Percentage; and

            (B) Quoted Rate U.S. Swingline Loans. If such U.S. Swingline Loan is
      a Quoted Rate U.S. Swingline Loan, at a per annum rate (computed on the
      basis of the actual number of days elapsed over a year of 360 days) equal
      to the Quoted Rate applicable thereto.

      Notwithstanding any other provision to the contrary set forth in this
      Credit Agreement, in the event that the principal amount of any Quoted
      Rate U.S. Swingline Loan is not repaid on the last day of the Interest
      Period for such Loan, then such Loan shall be automatically converted into
      a U.S. Base Rate Loan at the end of such Interest Period.

            (C) Payment of Interest. Airgas promises to pay interest on U.S.
      Swingline Loans in arrears on each applicable Interest Payment Date (or at
      such other times as may be specified herein).

      2.5 U.S. TERM LOAN.

            (a) U.S. Term Commitment. Subject to the terms and conditions hereof
      and in reliance upon the representations and warranties set forth herein
      each U.S. Term Lender severally agrees to make available to Airgas on the
      Closing Date (or on the effective date of any increase in the U.S. Term
      Loan Committed Amount pursuant to Section 4.4(b), as applicable) such U.S.
      Term Lender's U.S. Term Loan Percentage of a term loan in U.S. Dollars
      (the "U.S. Term Loan") in the aggregate principal amount equal to ONE
      HUNDRED MILLION U.S. DOLLARS ($100,000,000) (as such aggregate maximum
      amount may be increased from time to time as provided in Section 4.4, the
      "U.S. Term Loan Committed Amount"). The U.S. Term Loan may consist of U.S.
      Base Rate Loans or Eurodollar Loans, or a combination thereof, as Airgas
      may request; provided, however, that no more than five (5) Eurodollar
      Loans which are U.S. Term Loans shall be outstanding hereunder at any time
      (it being understood that, for purposes hereof, Eurodollar Loans with
      different Interest Periods shall be considered as separate Eurodollar
      Loans, even if they begin on the same date, although borrowings,
      extensions and conversions may, in accordance with the provisions hereof,
      be combined at the end of existing Interest Periods to constitute a new
      Eurodollar Loan with a single Interest Period). Amounts repaid on the U.S.
      Term Loan may not be reborrowed.

            (b) Borrowing Procedures. Airgas shall submit an appropriate Notice
      of Borrowing to the U.S. Agent not later than 11:00 A.M. (Charlotte, North
      Carolina time) on the Closing Date (or on the effective date of any
      increase in the U.S. Term Loan Committed Amount pursuant to Section
      4.4(b), as applicable), with respect to the portion of the U.S. Term Loan
      initially consisting of a U.S. Base Rate Loan, or on the third Business
      Day prior to the Closing Date (or on the effective date of any increase in
      the U.S. Term Loan Committed Amount pursuant to Section 4.4(b), as
      applicable), with respect to the portion of the U.S. Term Loan initially
      consisting of one or more Eurodollar Loans. Such Notice of Borrowing shall
      be irrevocable and shall specify (i) that the funding of a U.S. Term Loan
      is requested and (ii) whether the funding of the U.S. Term Loan shall be
      comprised of U.S. Base Rate Loans, Eurodollar Loans or a combination
      thereof, and if Eurodollar Loans are requested, the Interest Period(s)
      therefor. If Airgas shall fail to deliver such Notice of Borrowing to the
      U.S. Agent by 11:00 A.M. (Charlotte, North Carolina time) on the third
      Business Day prior to the Closing Date (or the effective date of any
      increase in the U.S. Term Loan Committed Amount pursuant to Section
      4.4(b), as applicable), then the full amount of the U.S. Term Loan shall
      be disbursed on the Closing Date (or on the

                                        37

<PAGE>

      effective date of any increase in the U.S. Term Loan Committed Amount
      pursuant to Section 4.4(b), as applicable) as a U.S. Base Rate Loan. Each
      U.S. Term Lender shall make its U.S. Term Loan Percentage of the U.S. Term
      Loan available to the U.S. Agent for the account of Airgas by 1:00 P.M.
      (Charlotte, North Carolina time) on the Closing Date (or on the effective
      date of any increase in the U.S. Term Loan Committed Amount pursuant to
      Section 4.4(b), as applicable) in U.S. Dollars and in funds immediately
      available to the U.S. Agent.

            (c) Minimum Amounts. Each Eurodollar Loan or U.S. Base Rate Loan
      that is part of the U.S. Term Loan shall be in an aggregate principal
       amount that is not less than $5,000,000 and integral multiples of
      $1,000,000 (or the then remaining principal balance of the U.S. Term Loan,
      if less).

            (d) Repayment of U.S. Term Loan. Airgas promises to pay the
      outstanding principal amount of the U.S. Term Loan in twenty (20)
      consecutive quarterly installments as follows (as such installments may
      hereafter be adjusted as a result of prepayments made pursuant to Section
      4.3 or as the result of an increase in the amount of the U.S. Term Loan
      Committed Amount pursuant to Section 4.4(b)), unless accelerated sooner
      pursuant to Section 9.2:

<TABLE>
<CAPTION>
                                        PRINCIPAL AMORTIZATION
                                           PAYMENT DUE ON THE
      PAYMENT DATES                     CORRESPONDING PAYMENT DATE
------------------------               ----------------------------
<S>                                    <C>
March 31, 2005, June 30,
  2005, September 30,                              3.75%
2005 and December 31,
         2005

March 31, 2006, June 30,
  2006, September 30,
2006 and December 31,                             3.75%
        2006

March 31, 2007, June 30,
  2007, September 30,
2007 and December 31,                              3.75%
        2007

March 31, 2008, June 30,
  2008, September 30,
  2008, and December 31,                           3.75%
        2008

March 31, 2009, June 30,                         10.00%
  2009 and September 30,
         2009

December 31, 2009                             Unpaid Balance
</TABLE>

            (e) Interest. Subject to the provisions of Section 4.1,

                  (i) U.S. Base Rate Loans. During such periods as the U.S. Term
            Loan shall be comprised in whole or in part of U.S. Base Rate Loans,
            such U.S. Base Rate Loans

                                       38

<PAGE>

            shall bear interest at a per annum rate equal to the U.S. Base Rate
            plus the Applicable Percentage; and

                  (ii) Eurodollar Loans. During such periods as the U.S. Term
            Loan shall be comprised in whole or in part of Eurodollar Loans,
            such Eurodollar Loans shall bear interest at a per annum rate equal
            to the Eurodollar Rate plus the Applicable Percentage.

            Airgas promises to pay interest on the U.S. Term Loan in arrears on
      each applicable Interest Payment Date (or at such other times as may be
      specified herein).

                                    ARTICLE III

                        CANADIAN DOLLAR CREDIT FACILITIES

      3.1 CANADIAN REVOLVING LOANS.

      (a) Canadian Revolving Commitment. Subject to the terms and conditions
hereof and in reliance upon the representations and warranties set forth herein,
each Canadian Lender severally and not jointly agrees to make available to each
Canadian Borrower, for its own account, such Canadian Lender's Canadian
Commitment Percentage of revolving credit loans requested by the Canadian
Borrowers in Canadian Dollars ("Canadian Revolving Loans") from time to time
from the Closing Date until the Termination Date, or such earlier date as the
Canadian Revolving Commitments shall have been terminated as provided herein for
the purposes hereinafter set forth; provided, however, that the sum of the
aggregate principal amount of outstanding Canadian Revolving Loans shall not
exceed FIFTY MILLION CANADIAN DOLLARS (C$50,000,000) (as such aggregate maximum
amount may be reduced from time to time as provided in Section 4.4, the
"Canadian Revolving Committed Amount"); provided, further, (i) with regard to
each Canadian Lender individually, outstanding Canadian Revolving Loans of such
Canadian Lender plus the participation interests in Canadian LOC Obligations of
such Canadian Lender plus the BA Outstandings of such Canadian Lender shall not
exceed such Canadian Lender's Canadian Commitment Percentage of the Canadian
Revolving Committed Amount and (ii) with regard to the Canadian Lenders
collectively, the aggregate principal amount of outstanding Canadian Revolving
Loans plus the aggregate principal amount of outstanding Canadian Swingline
Loans plus Canadian LOC Obligations outstanding plus the BA Outstandings shall
not exceed the Canadian Revolving Committed Amount. Canadian Revolving Loans
hereunder may be repaid and reborrowed in accordance with the provisions hereof.

      (b) Canadian Revolving Loan Borrowings.

            (i) Notice of Borrowing. Each Canadian Borrower (by its duly
      authorized officers or representatives) shall request a Canadian Revolving
      Loan borrowing by Notice of Borrowing (or telephone notice promptly
      confirmed by delivery of a Notice of Borrowing) to the Canadian Agent not
      later than 11:00 A.M. (Toronto, Ontario time) on the Business Day prior to
      the date of the requested borrowing. Each such request for borrowing shall
      be irrevocable and shall specify (A) that a Canadian Revolving Loan is
      requested, (B) the date of the requested borrowing (which shall be a
      Business Day) and (C) the aggregate principal amount to be borrowed. The
      Canadian Agent shall give notice to each affected Canadian Lender promptly
      upon receipt of each Notice of Borrowing pursuant to this Section
      3.1(b)(i), specifying the contents thereof and each such Canadian Lender's
      share of any borrowing to be made pursuant thereto.

            (ii) Minimum Amounts. Each Canadian Revolving Loan shall be in a
      minimum aggregate principal amount of C$1,500,000 and integral multiples
      of C$100,000 in excess thereof (or the remaining amount of the Canadian
      Revolving Committed Amount, if less).

                                       39

<PAGE>

            (iii) Advances. Each Canadian Lender will make its Canadian
      Commitment Percentage of each Canadian Revolving Loan borrowing available
      to the Canadian Agent for the account of the particular Canadian Borrower
      by 1:00 P.M. (Toronto, Ontario time) on the date specified in the
       applicable Notice of Borrowing in Canadian Dollars and in funds
      immediately available to the Canadian Agent. Such borrowing will then be
      made available to the particular Canadian Borrower by the Canadian Agent
      in like funds as received by the Canadian Agent by (A) crediting the
      account of such Canadian Borrower on the books of the Canadian Agent with
      the amount of such funds or (B) wire transfer of such funds, in each case
      in accordance with instructions provided to (and reasonably acceptable to)
      the Canadian Agent by such Canadian Borrower

      (c) Repayment. Each Canadian Borrower promises to pay the principal amount
of all Canadian Revolving Loans made to such Canadian Borrower in full on the
Termination Date.

      (d) Interest. Subject to the provisions of Section 4.1, Canadian Revolving
Loans shall bear interest at a per annum rate equal to the Canadian Base Rate
plus the Applicable Percentage. Each Canadian Borrower promises to pay interest
on Canadian Revolving Loans made to such Canadian Borrower monthly in arrears on
each applicable Interest Payment Date (or at such other times as may be
specified herein).

      3.2 CANADIAN SWINGLINE LOAN SUBFACILITY.

      (a) Canadian Swingline Commitment. Subject to the terms and conditions set
forth herein, the Canadian Swingline Lender agrees, in reliance upon the
agreements of the other Canadian Lenders set forth in this Section 3.2, each
Canadian Borrower may, in its individual capacity, obtain revolving credit loans
in Canadian Dollars from the Canadian Swingline Lender, in its individual
capacity (each a "Canadian Swingline Loan" and, collectively, the "Canadian
Swingline Loans"), from time to time from the Closing Date until the Termination
Date (i) by written notice (or telephone notice promptly confirmed in writing)
from such Canadian Borrower (by its duly authorized officers or representatives)
to the Canadian Swingline Lender not later than 2:00 P.M. (Toronto, Canada time)
on the Business Day of the requested Canadian Swingline Loan advance (in which
case the Canadian Swingline Lender shall credit the funds requested to the
applicable Operating Account by 3:00 P.M. (Toronto, Canada time) on the Business
Day of the requested borrowing) or (ii) by way of overdraft in the Canadian
Dollar operating accounts maintained by such Canadian Borrower with the Canadian
Swingline Lender (collectively, the "Operating Accounts"), for the purposes
hereinafter set forth; provided, however, (A) the aggregate principal amount of
Canadian Swingline Loans outstanding at any time shall not exceed FIVE MILLION
CANADIAN DOLLARS (C$5,000,000) (the "Canadian Swingline Committed Amount"), and
(B) the aggregate principal amount of outstanding Canadian Revolving Loans plus
the aggregate principal amount of outstanding Canadian Swingline Loans plus
Canadian LOC Obligations outstanding plus the BA Outstandings shall not exceed
the Canadian Revolving Committed Amount. Unless the Canadian Borrowers have made
prior arrangements with the Canadian Swingline Lender (including without
limitation by requesting a Canadian Revolving Loan), the Canadian Swingline
Lender may return any debit from an Operating Account that, if paid, would
result in the aggregate principal amount of outstanding Canadian Swingline Loans
exceeding the Canadian Swingline Committed Amount if (1) any Default or Event of
Default then exists or (2) if the applicable Canadian Borrower does not, on or
before the first Business Day after receipt by such Canadian Borrower of notice
of such excess from the Canadian Swingline Lender, deposit money or request a
Canadian Revolving Loan sufficient to cover such debit. Canadian Swingline Loans
hereunder may be repaid and reborrowed in accordance with the provisions hereof.

      (b) Repayment of Canadian Swingline Loans. Each Canadian Borrower hereby
promises to repay the principal amount of each Canadian Swingline Loan taken by
such Canadian Borrower on the

                                       40

<PAGE>

earlier of (A) the maturity date agreed to by the Canadian Swingline Lender and
such Canadian Borrower with respect to such Canadian Swingline Loan or (B) the
Termination Date. The Canadian Swingline Lender may, at any time, in its sole
discretion, by written notice to the Canadian Borrower and the Canadian Lenders,
demand repayment of its Canadian Swingline Loans by way of a Canadian Revolving
Loan advance, in which case the Canadian Borrower shall be deemed to have
requested a Canadian Revolving Loan advance in the amount of such Canadian
Swingline Loans; provided, however, that such a demand shall be deemed to have
been given one Business Day prior to the Termination Date and on the date of the
occurrence of any Event of Default described in Section 9.1 (or if such date is
not a Business Day, the first Business Day succeeding such date) and upon
acceleration of the indebtedness hereunder and the exercise of remedies in
accordance with the provisions of Section 9.2. Each Canadian Lender hereby
irrevocably agrees to make its pro rata share of each such Canadian Revolving
Loan in the amount, in the manner and on the date specified in the preceding
sentence notwithstanding (I) the amount of such borrowing may not comply with
the minimum amount for advances of Canadian Revolving Loans otherwise required
hereunder, (II) whether any conditions specified in Section 5.2 are then
satisfied, (III) whether a Default or an Event of Default then exists, (IV)
failure of any such request or deemed request for a Canadian Revolving Loan to
be made by the time otherwise required hereunder, (V) whether the date of such
borrowing is a date on which Canadian Revolving Loans are otherwise permitted to
be made hereunder or (VI) any termination of the Commitments relating thereto
immediately prior to or contemporaneously with such borrowing.

            (c) Interest on Canadian Swingline Loans.

            (i) Interest Rate. Subject to the provisions of Section 4.1, each
      Canadian Swingline Loan shall bear interest at a per annum rate (computed
      on the basis of the actual number of days elapsed over a year of 365 days)
      equal to the Canadian Base Rate plus the Applicable Percentage; and

            (ii) Payment of Interest. With respect to each Canadian Swingline
      Loan taken by a Canadian Borrower, such Canadian Borrower hereby promises
      to pay all interest on the outstanding principal amount of such Canadian
      Swingline Loan in arrears on each applicable Interest Payment Date (or at
      such other times as may be specified herein).

      3.3 CANADIAN LETTER OF CREDIT SUBFACILITY.

      (a) Issuance. Subject to the terms and conditions hereof and of the
Canadian LOC Documents, if any, and any other terms and conditions which the
Canadian Issuing Lender may reasonably require, and in reliance upon the
agreements of  


 
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