Document:

<PAGE>

                                                                EXHIBIT 10.4

                                 $230,000,000

                               CREDIT AGREEMENT

                        Dated as of September 30, 1999

                                     Among

                             BMAC HOLDINGS, INC.,

                             as Parent Guarantor,
                             -------------------

                     BETTER MINERALS & AGGREGATES COMPANY,

                                 as Borrower,
                                 -----------

                     GEORGE F. PETTINOS (CANADA) LIMITED,

                             as Canadian Borrower,
                             ---------------------

                                      and

                       THE INITIAL LENDERS NAMED HEREIN

                                      and

                          BANQUE NATIONALE DE PARIS,

              as Agent, Swing Line Bank and Initial Issuing Bank
              --------------------------------------------------

                    ______________________________________

                            CHASE SECURITIES INC.,
<PAGE>

                        as Lead Arranger, Book Manager,

                   Syndication Agent and Documentation Agent
<PAGE>

                       T A B L E   O F   C O N T E N T S

<TABLE>
<CAPTION>
Section                                                                                                        Page
<S>                                                                                                            <C>
                  ARTICLE I DEFINITIONS AND ACCOUNTING TERMS

     1.01.  Certain Defined Terms............................................................................   1
     1.02.  Computation of Time Periods; Other Definitional Provisions.......................................  28
     1.03.  Accounting Terms.................................................................................  28

     ARTICLE II AMOUNTS AND TERMS OF THE ADVANCES AND THE LETTERS OF CREDIT

     2.01.  The Advances and the Letters of Credit...........................................................  28
     2.02.  Making the Advances..............................................................................  30
     2.03.  Issuance of and Drawings and Reimbursement Under Letters of Credit...............................  32
     2.04.  Drawings of Bankers' Acceptances.................................................................  33
     2.05.  Repayment of Advances............................................................................  36
     2.06.  Termination or Reduction of the Commitments......................................................  38
     2.07.  Prepayments......................................................................................  40
     2.08.  Interest.........................................................................................  43
     2.09.  Fees.............................................................................................  45
     2.10.  Conversion of Advances...........................................................................  46
     2.11.  Renewal and Conversion of Bankers' Acceptances...................................................  47
     2.12.  Increased Costs, Etc.............................................................................  49
     2.13.  Payments and Computations........................................................................  52
     2.14.  Taxes............................................................................................  53
     2.15.  Sharing of Payments, Etc.........................................................................  56
     2.16.  Use of Proceeds..................................................................................  57
     2.17.  Evidence of Debt.................................................................................  58
     2.18.  Replacement of Lenders...........................................................................  58

                       ARTICLE III CONDITIONS OF LENDING

     3.01.  Conditions Precedent to Initial Extension of Credit..............................................  59
     3.02.  Conditions Precedent to Each Borrowing, Drawing and Issuance.....................................  66
     3.03.  Determinations Under Section 3.01................................................................  67

                   ARTICLE IV REPRESENTATIONS AND WARRANTIES
</TABLE>
<PAGE>

<TABLE>
<S>                                                                                                            <C>
     4.01.  Representations and Warranties of the Borrower..................................................   67

         ARTICLE V COVENANTS OF THE BORROWER OF THE CANADIAN BORROWER
                          AND OF THE PARENT GUARANTOR

     5.01.  Affirmative Covenants...........................................................................   73
     5.02.  Negative Covenants..............................................................................   77
     5.03.  Reporting Requirements..........................................................................   86
     5.04.  Financial Covenants.............................................................................   89
     5.05.  Covenants of the Canadian Borrower..............................................................   92

                         ARTICLE VI EVENTS OF DEFAULT

     6.01.  Events of Default...............................................................................   92
     6.02.  Actions in Respect of the Letters of Credit and Bankers' Acceptances upon Default...............   95

                             ARTICLE VII THE AGENT

     7.01.  Authorization and Action........................................................................   95
     7.02.  Agent's Reliance, Etc...........................................................................   96
     7.03.  BNP and Affiliates..............................................................................   96
     7.04.  Lender Party Credit Decision....................................................................   96
     7.05.  Indemnification.................................................................................   97
     7.06.  Successor Agents................................................................................   98

                          ARTICLE VIII MISCELLANEOUS

     8.01.  Amendments, Etc.................................................................................   99
     8.02.  Notices, Etc....................................................................................  100
     8.03.  No Waiver; Remedies.............................................................................  100
     8.04.  Costs and Expenses..............................................................................  100
     8.05.  Right of Set-off................................................................................  102
     8.06.  Binding Effect..................................................................................  102
     8.07.  Assignments and Participations..................................................................  103
     8.08.  Execution in Counterparts.......................................................................  105
     8.09.  No Liability of the Issuing Bank................................................................  105
     8.10.  Confidentiality.................................................................................  106
     8.11.  Jurisdiction, Etc...............................................................................  106
     8.12.  Judgment........................................................................................  106
     8.13.  Governing Law...................................................................................  107
</TABLE>
<PAGE>

<TABLE>
     <S>                                                              <C>
     8.14.  Waiver of Jury Trial................................      107
     8.15.  Power of Attorney...................................      107
</TABLE>

SCHEDULES

Schedule I                  -      Commitments and Applicable Lending Offices

Schedule II                 -      Subsidiary Guarantors

Schedule 1.01               -      Existing Letters of Credit

Schedule 3.01(f)            -      Surviving Debt

Schedule 3.01(g)(vii)       -      Secretary of State Certificates

Schedule 3.01(g)(x)(A)      -      UCC Financing Statement Filings

Schedule 3.01(g)(x)(B)      -      Lien Searches

Schedule 3.01(g)(xiv)(B)    -      Properties Requiring Boundary Surveys

Schedule 3.01(g)(xiv)(C)    -      Properties Requiring Survey Affidavits

Schedule 3.01(g)(xxii)      -      Local Counsel

Schedule 3.01(g)(xxv)       -      Locations of Leased Properties Requiring
                                   Landlord Consents

Schedule 4.01(a)            -      Share Ownership

Schedule 4.01(b)            -      Subsidiaries

Schedule 4.01(d)            -      Authorizations, Approvals, Actions, Notices
                                   and Filings

Schedule 4.01(l)            -      Plans, Multiemployer Plans and Welfare Plans

Schedule 4.01(t)(i)         -      Environmental Laws and Permits

Schedule 4.01(t)(ii)        -      Environmental Action

Schedule 4.01(u)(i)         -      Environmental Listing

Schedule 4.01(u)(ii)        -      Storage Tanks

Schedule 4.01(u)(iii)       -      Asbestos

Schedule 4.01(u)(iv)        -      Hazardous Material

Schedule 4.01(z)            -      Open Years

Schedule 4.01(aa)           -      Excluded Federal Tax Liability

Schedule 4.01(bb)           -      Excluded State, Local and Foreign Tax
                                   Liability

Schedule 4.01(ee)           -      Existing Debt

Schedule 4.01(gg)           -      Material Owned Real Property

Schedule 4.01(hh)           -      Material Leased Real Property

Schedule 4.01(ii)           -      Investments

Schedule 4.01(jj)           -      Intellectual Property
<PAGE>

                                                                              iv

Schedule 5.01(m)         -  Properties Requiring Post-Closing Surveys

Schedule 5.02(a)(iii)    -  Existing Liens

Schedule 5.02(e)(v)      -  Disposable Real Property

EXHIBITS

Exhibit A-1    -  Form of Term A Note

Exhibit A-2    -  Form of Term B Note

Exhibit A-3    -  Form of Working Capital Note

Exhibit A-4    -  Form of Acquisition Note

Exhibit A-5    -  Form of Canadian Borrower Note

Exhibit A-6    -  Form of Generic Draft

Exhibit B-1    -  Form of Notice of Borrowing

Exhibit B-2    -  Form of Notice of Drawing

Exhibit C      -  Form of Assignment and Acceptance

Exhibit D      -  Form of Security Agreement

Exhibit E      -  Form of Parent Guarantor Security Agreement

Exhibit F      -  Form of Intellectual Property Security Agreement

Exhibit G      -  Form of Canadian Security Agreement

Exhibit H      -  Form of Parent Guaranty

Exhibit I      -  Form of Subsidiary Guaranty

Exhibit J      -  Form of Mortgage

Exhibit K      -  [Intentionally Omitted]

Exhibit L-1    -  Form of Opinion of Counsel for the Borrower, the Parent
                    Guarantor and the Subsidiary Guarantors

Exhibit L-2    -  Form of Opinion of Local Counsel to the Borrower

Exhibit L-3    -  Form of Opinion of Canadian Counsel to the Canadian Borrower

Exhibit M-1    -  Form of Parent Guarantor Solvency Certificate with Respect to
                    a Permitted Acquisition

Exhibit M-2    -  Form of Parent Guarantor Solvency Certificate with Respect to
                    the Acquisition
<PAGE>

                                                                               v

Exhibit M-3    -  Form of Parent Guarantor Solvency Certificate with Respect to
                    an Acquisition Borrowing

Exhibit N-1    -  Form of Borrower Intercompany Note

Exhibit N-2    -  Form of Subsidiary Intercompany Note

Exhibit O      -  Form of Canadian Borrower Intercompany Note
<PAGE>

                               CREDIT AGREEMENT

          CREDIT AGREEMENT dated as of September 30, 1999 (this "Agreement"),
among BMAC Holdings, Inc., a Delaware corporation (the "Parent Guarantor"),
                                                        ----------------
Better Minerals & Aggregates Company, a Delaware corporation formerly known as
"USS Intermediate Holdco, Inc." (the "Borrower"), George F. Pettinos (Canada)
                                      --------
Limited, a corporation organized and existing under the laws of Ontario, Canada
(the "Canadian Borrower"), the banks, financial institutions and other
      -----------------
institutional lenders listed on the signature pages hereof as the Initial
Lenders (the "Initial Lenders"), and Banque Nationale de Paris ("BNP"), as the
              ---------------                                    ---
Initial Issuing Bank (the "Initial Issuing Bank"), as the swing line bank (the
                           --------------------
"Swing Line Bank") and as agent (together with any successor appointed pursuant
 ---------------
to Article VII, the "Agent") for the Lender Parties (as hereinafter defined).
                     -----

PRELIMINARY STATEMENTS:

          (1)  The Borrower has requested that the Lender Parties make available
to the Borrower and the Canadian Borrower the Facilities (as hereinafter
defined) (a) to finance the acquisition (the "Acquisition") by the Borrower,
                                              -----------
directly or indirectly, of (i) all of the issued and outstanding capital stock
of Commercial Stone Co. Inc., a Pennsylvania corporation ("CSC"), (ii) all the
outstanding partnership interests in Commercial Aggregates Transportation and
Sales, L.P., a Pennsylvania limited partnership ("CATS"), and (iii) certain real
property (collectively with CSC and CATS, the "Acquired Businesses"), all
                                               -------------------
pursuant to the Purchase Agreement (as hereinafter defined), (b) to refinance
certain Existing Debt, (c) to pay transaction fees and expenses, (d) to provide
for working capital for the Borrower and the Canadian Borrower, (e) to finance
the purchase of Permitted Acquisitions and (f) for other general corporate
purposes permitted under this Agreement.

          (2)  The Lender Parties are willing to provide the Facilities upon
terms and conditions provided herein.

          NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements contained herein, the parties hereto hereby agree as
follows:

                                   ARTICLE I

                       DEFINITIONS AND ACCOUNTING TERMS

          SECTION 1.01.  Certain Defined Terms.  As used in this Agreement, the
                         ---------------------
following terms shall have the following meanings (such meanings to be equally
applicable to both the singular and plural forms of the terms defined):
<PAGE>

          "Acquired Businesses" has the meaning specified in the Preliminary
           -------------------
Statements hereto.

          "Acquired EBITDA" means, with respect to any Acquired Entity or
           ---------------
Business or any Sold Entity or Business for any period, the EBITDA of such
Entity or Business for such period.

          "Acquired Entity or Business" has the meaning specified in the
           ---------------------------
     definition of the term "Adjusted EBITDA".
                             ---------------

          "Acquisition" has the meaning specified in the Preliminary Statements
           -----------
     hereto.

          "Acquisition Advance" has the meaning specified in Section 2.01(e).
           -------------------

          "Acquisition Borrowing" means a borrowing consisting of simultaneous
           ---------------------
     Acquisition Advances of the same Type made by the Acquisition Lenders,
     made, converted or continued on the same date and, in the case of
     Eurodollar Rate Advances, as to which a single Interest Period is in
     effect.

          "Acquisition Commitment" means, with respect to any Acquisition Lender
           ----------------------
     at any time, the amount set forth opposite such Lender's name on Schedule I
     hereto under the caption "Acquisition Commitment" or, if such Lender has
     entered into one or more Assignments and Acceptances, the amount set forth
     for such Lender in the Register maintained by the Agent pursuant to Section
     8.07(d) as such Lender's "Acquisition Commitment", as such amount may be
     reduced at or prior to such time pursuant to Section 2.06.

          "Acquisition Facility" means, at any time, the aggregate amount of the
           --------------------
     Acquisition Lenders' Acquisition Commitments at such time.

          "Acquisition Lender" means any Lender that has an Acquisition
           ------------------
     Commitment.

          "Acquisition Note" means a promissory note of the Borrower payable to
           ----------------
     the order of any Acquisition Lender, in substantially the form of Exhibit
     A-4 hereto, evidencing the indebtedness of the Borrower to such Lender
     resulting from the Acquisition Advances made by such Lender, to the extent
     required to be issued pursuant to Section 2.17.

          "Acquisition Reduction Amount" has the meaning specified in Section
           ----------------------------
     2.07(b)(vi).

          "Advance" means a Term Advance, a Working Capital Advance, an
           -------
     Acquisition Advance, a Swing Line Advance, a Canadian Borrower Advance or a
     Letter of Credit Advance.

          "Adjusted EBITDA" means, with respect to any Person for any period,
           ---------------
     EBITDA of such Person for such period, calculated by (a) including in the
     determination thereof
<PAGE>

                                                                               3

     the Acquired EBITDA of any other Person, property, business or asset
     acquired during such period pursuant to a transaction permitted under
     Section 5.02(f) and not subsequently sold, transferred or otherwise
     disposed of during such period to the extent acquired by such Person or any
     of its Subsidiaries during such period (each such Person, property,
     business or asset acquired and not subsequently so disposed of, an
     "Acquired Entity or Business"), based on the actual Acquired EBITDA of
      ---------------------------
     such Acquired Entity or Business for such period (including the portion
     thereof occurring prior to such acquisition) and (b) excluding in the
     determination thereof the Acquired EBITDA of any Person, property, business
     or asset sold, transferred or otherwise disposed of by such Person or any
     of its Subsidiaries during such period (each such Person, property,
     business or asset so sold or disposed of, a "Sold Entity or Business")
                                                  -----------------------
     based on the actual Acquired EBITDA of such Sold Entity or Business for
     such period (including the portion thereof occurring prior to such sale,
     transfer or disposition).

          "Affiliate" means, as to any Person, any other Person that, directly
           ---------
     or indirectly, controls, is controlled by or is under common control with
     such Person or is a director or officer of such Person.  For purposes of
     this definition, the term "control" (including the terms "controlling",
     "controlled by" and "under common control with") of a Person means the
     possession, direct or indirect, of the power to vote 5% or more of the
     Voting Stock of such Person or to direct or cause the direction of the
     management and policies of such Person, whether through the ownership of
     Voting Stock, by contract or otherwise, provided that the term "Affiliate",
                                             --------
     as to The Chase Manhattan Bank, shall be deemed not to include Chase
     Capital.

          "Agent" has the meaning specified in the recital of parties to this
           -----
     Agreement.

          "Agent's Account" means (a) in the case of Advances (other than
           ---------------
     Canadian Borrower Advances), the account of the Agent maintained by the
     Agent at the Federal Reserve Bank of New York, 33 Liberty Street, New York,
     New York 10048, ABA No. 026007689, for further credit to Account No.
     750420-701-03 or such other account maintained by the Agent and designated
     by the Agent in a written notice to the Lender Parties and the Borrower,
     and (b) in the case of any Canadian Borrower Advance, the account of the
     Sub-Agent designated in writing from time to time by the Agent to the
     Canadian Borrower and the Canadian Lenders for such purpose.

          "Annualization Factor" means a factor the numerator of which is the
           --------------------
     number 365 and the denominator of which is the number of days in the
     Rolling Period.

          "Applicable Borrower" means (a) with respect to the Term A Facility,
           -------------------
     the Term B Facility, the Working Capital Facility, the Acquisition
     Facility, the Swing Line Facility or the Letter of Credit Facility or any
     Advances or Borrowings thereunder, the Borrower and
<PAGE>

                                                                               4

     (b) with respect to the Canadian Facility or any Advances, Drawings or
     Borrowings thereunder, the Canadian Borrower.

          "Applicable Lending Office" means (a) in the case of any Advances
           -------------------------
     (other than a Canadian Borrower Advance) and with respect to each Lender
     Party, such Lender Party's Domestic Lending Office in the case of a Base
     Rate Advance, such Lender Party's Eurodollar Lending Office in the case of
     a Eurodollar Rate Advance and (b) in the case of any Canadian Borrower
     Advance, each Canadian Lender's Canadian Domestic Lending Office.

          "Applicable Margin", with respect to Advances under the Term A
           -----------------
     Facility, the Working Capital Facility, the Acquisition Facility and the
     Canadian Facility, Bankers' Acceptances or commitment fees under the
     Working Capital Facility or the Acquisition Facility, as the case may be,
     means the applicable percentage per annum determined by reference to the
     ratio of (i) Funded Debt as of the last day of the most recently ended
     fiscal quarter to (ii) Consolidated EBITDA of the Borrower and its
     Subsidiaries for the four fiscal quarters most recently ended prior to the
     start of such period, as determined pursuant to the financial statements
     most recently delivered to the Agent at the end of each fiscal quarter, as
     the case may be, as set forth below:

<TABLE>
<CAPTION>
  ========================================================================================================================

                                                          Eurodollar Rate
                             Base Rate                       Advances
                          Advances under                  under the Term       Applicable      Working
                           the Term A        Canadian     A Facility, the     Margin with      Capital     Acquisition
     Funded Debt to       Facility, the        Prime          Working          respect to     Facility       Facility
     EBITDA Ratio        Working Capital       Rate       Capital Facility      Bankers'     Commitment    Commitment
                         Facility and the    Advances         and the         Acceptances       Fees          Fees
                           Acquisition                      Acquisition
                            Facility                         Facility
  ------------------------------------------------------------------------------------------------------------------------
  <S>                    <C>                 <C>          <C>                 <C>            <C>           <C>
  Level I
  -------
    greater than 4.50
    to 1.00                   2.00%           2.50%            3.00%             4.25%           0.50%        0.75%
  ------------------------------------------------------------------------------------------------------------------------

  Level II
  --------
    less than or
    equal to 4.50 to
    1.00 but greater
    than 4.25 to 1.00         1.75%           2.25%            2.75%             4.00%           0.50%        0.75%
  ------------------------------------------------------------------------------------------------------------------------

  Level III
  ---------
    less than or
    equal to 4.25 to
    1.00 but greater than     1.50%           2.00%            2.50%             3.75%           0.50%        0.75%
</TABLE>
<PAGE>

                                                                               5

<TABLE>
  <S>                         <C>             <C>              <C>               <C>             <C>          <C>
  ----------------------------------------------------------------------------------------------------------------------
    than 4.00 to 1.00
  ----------------------------------------------------------------------------------------------------------------------

   Level IV
   --------
    less than or
    equal to 4.00 to
    1.00 but greater
    than 3.75 to 1.00         1.25%           1.75%            2.25%             3.50%           0.375%       0.50%
 -----------------------------------------------------------------------------------------------------------------------

  Level V
  -------
    less than or
    equal to 3.75 to
    1.00                      1.00%           1.50%            2.00%             3.25%           0.375%       0.50%
========================================================================================================================
</TABLE>

    provided that (a) from the date of the Initial Extension of Credit through
    --------
    and including March 31, 2000, the Applicable Margin shall at all times be
    the Level I Applicable Margin referred to above, (b) no change in the
    Applicable Margin shall be effective until five Business Days after the date
    on which the Agent receives financial statements at the end of each fiscal
    quarter, and (c) if the Borrower has not submitted to the Agent the
    information described in clause (b) of this proviso as and when required,
                                                -------
    the Applicable Margin shall be the Level I Applicable Margin for so long as
    such information described in clause (b) of this proviso has not been
                                                     -------
    received by the Agent.

          "Appropriate Lender" means, at any time, with respect to (a) any of
           ------------------
    the Term A, Term B, Working Capital, Canadian or Acquisition Facilities, a
    Lender that has a Commitment with respect to such Facility at such time, (b)
    the Letter of Credit Facility, (i) any Issuing Bank and (ii) if the other
    Working Capital Lenders have made Letter of Credit Advances pursuant to
    Section 2.03(c) that are outstanding at such time, each such other Working
    Capital Lender and (c) the Swing Line Facility, (i) the Swing Line Bank and
    (ii) if the other Working Capital Lenders have made Swing Line Advances
    pursuant to Section 2.02(b) that are outstanding at such time, each such
    other Working Capital Lender.

          "Assignment and Acceptance" means an assignment and acceptance entered
           -------------------------
    into by a Lender Party and an Eligible Assignee, and accepted by the Agent,
    in accordance with Section 8.07 and in substantially the form of Exhibit C
    hereto.

          "Available Amount" of any Letter of Credit means, at any time, the
           ----------------
    maximum amount available to be drawn under such Letter of Credit at such
    time (assuming compliance at such time with all conditions to drawing).

          "BA Lending Office" means, with respect to each Canadian Lender, the
           -----------------
    office of such Lender set forth as its "BA Lending Office" opposite its name
    on Schedule I hereto or in the Assignment and Acceptance pursuant to which
    it became a lender or such other
<PAGE>

                                                                               6

     office of such Lender in Canada as such Lender may from time to time
     specify to the Canadian Borrower and the Agent for such purpose.

          "BA Rate" means, for all Bankers' Acceptances comprising part of the
           -------
     same Drawing to be purchased by a Canadian Lender, the average rate
     (calculated on an annual basis of a year of 365 days or 366 Days, as the
     case may be, and rounded up to the nearest multiple of 1/4 of 1%, if such
     average is not such a multiple) for Canadian Dollar bankers' acceptances
     having a comparable term that appears on the Reuters Screen CDOR Page (or
     such other page as is a replacement page for such bankers' acceptances) at
     10:00 A.M. (Toronto time) or, if such rate is not available at such time,
     the applicable discount rate in respect of such Bankers' Acceptances shall
     be the discount rate (calculated on an annual basis of 365 days or 366
     days, as the case may be), quoted by the Sub-Agent at 9:30 A.M. (Toronto
     time) on the date of such Drawing as the discount rate at which the Sub-
     Agent would purchase, on such date, its own bankers' acceptances having an
     aggregate Face Amount equal to and with a term to maturity the same as the
     Bankers' Acceptances to be acquired by such Canadian Lender as part of such
     Drawing.

          "Bankers' Acceptance" has the meaning specified in Section 2.01(d).
           -------------------

          "Bank Hedge Agreement" means any Hedge Agreement required or permitted
           --------------------
     under Article V that is entered into by and between a Loan Party and any
     Hedge Bank.

          "Base Rate" means a fluctuating interest rate per annum in effect from
           ---------
     time to time, which rate per annum shall at all times be equal to the
     higher of:

               (a)  the rate of interest announced publicly by BNP in New York,
          New York, from time to time, as its prime rate (and such term shall
          not be construed to be its best or most favorable rate); and

               (b)  1/2 of one percent per annum above the Federal Funds Rate.

          "Base Rate Advance" means an Advance that bears interest as provided
           -----------------
     in Section 2.08(b)(i).

          "BNP" has the meaning specified in the recital of parties to this
           ---
     Agreement.

          "Borrower" has the meaning specified in the recital of parties to this
           --------
     Agreement.

          "Borrower's Account" means (a) with respect to the Borrower, the
           ------------------
     account of such Borrower maintained by the Borrower with BNP at its office
     at 499 Park Avenue, New York, New York 10022, Account No. 200877-001-91, or
     such other account as the Borrower and the Agent may from time to time
     designate as such "Borrower's Account",
<PAGE>

                                                                               7

     and (b) with respect to the Canadian Borrower, the account of such Canadian
     Borrower maintained by the Canadian Borrower with the Sub-Agent at its
     office at 121 King Street West, Suite 2130, Toronto M5H 3T9, Account
     No. 03-32551, or such other account as the Canadian Borrower and the Agent
     may from time to time designate as such "Borrower's Account".

          "Borrowing" means a Term Borrowing, a Working Capital Borrowing, an
           ---------
     Acquisition Borrowing, a Canadian Borrowing or a Swing Line Borrowing.

          "Business Day" means a day of the year on which banks are not required
           ------------
     or authorized by law to close in New York City and, if the applicable
     Business Day relates to any Eurodollar Rate Advances, on which dealings are
     carried on in the London interbank market.

          "Business Plan" means the business plan of the Borrower which shall be
           -------------
     in form and substance reasonably satisfactory to the Agent (including
     projected balance sheets, income, stockholders' equity and cash flow
     statements on a monthly basis for the Fiscal Year following such Fiscal
     Year then ended).

          "Canadian Borrower" has the meaning specified in the recital of
           -----------------
     parties to this Agreement.

          "Canadian Borrower Advance" has the meaning specified in Section
           -------------------------
     2.01(d).

          "Canadian Borrower Note" means a promissory note of the Canadian
           ----------------------
     Borrower payable to the order of any Canadian Lender, in substantially the
     form of Exhibit A-5 hereto, evidencing the aggregate indebtedness of the
     Canadian Borrower to such Lender resulting from the Canadian Borrower
     Advances made by or otherwise owing to such Lender, to the extent required
     to be issued pursuant to Section 2.17.

          "Canadian Borrowing" means a borrowing consisting of simultaneous
           ------------------
     Canadian Borrower Advances made by the Canadian Lenders on the same date.

          "Canadian Business Day" means a day of the year on which banks are not
           ---------------------
     required or authorized by law to close in Toronto, Ontario, Canada.

          "Canadian Cash Collateral Account" has the meaning specified in the
           --------------------------------
     Canadian Security Agreement.

          "Canadian Commitment" means, with respect to any Canadian Lender at
           -------------------
     any time, the Canadian Dollar amount set forth opposite such Lender's name
     on Schedule I hereto under the caption "Canadian Commitment" or, if such
     Lender has entered into one
<PAGE>

                                                                               8

     or more Assignments and Acceptances, set forth for such Lender in the
     Register maintained by the Agent pursuant to Section 8.07(d) as such
     Lender's "Canadian Commitment", as such Canadian Dollar amount may be
     reduced at or prior to such time pursuant to Section 2.06.

          "Canadian Dollars" and "CN$" each means lawful money of Canada.
           ----------------       ---

          "Canadian Domestic Lending Office" means, with respect to each
           --------------------------------
     Canadian Lender, the office of such Lender specified as its "Domestic
     Lending Office" opposite its name on Schedule I hereto or in the Assignment
     and Acceptance pursuant to which it became a Lender or such other office of
     such Lender as such Lender may from time to time specify to the Canadian
     Borrower and the Agent.

          "Canadian Facility" means, at any time, the aggregate amount of the
           -----------------
     Canadian Lenders' Canadian Commitments at such time.

          "Canadian Interbank Rate" means the interest rate, expressed as a
           -----------------------
     percentage per annum, which is customarily used by the Agent when
     calculating interest due by it or owing to it arising from or in connection
     with correction of errors between it and other Canadian chartered banks.

          "Canadian Lender" means any Lender that (a) is a resident in Canada
           ---------------
     for purposes of the Income Tax Act (Canada) and (b) has a Canadian
     Commitment.

          "Canadian Prime Rate" means a fluctuating interest rate per annum in
           -------------------
     effect from time to time, which rate per annum shall at all times be equal
     to the higher of:

               (a)  the rate of interest announced publicly by the Sub-Agent in
          Toronto, Ontario from time to time as its prime rate for determining
          rates of interest on commercial loans in Canadian Dollars made by it
          in Canada; and

               (b)  3/4 of one percent per annum above the rate for 30-day
          Canadian Dollar bankers' acceptances that appears on the Reuters
          Screen CDOR Page (or any replacement page) as of 10:00 A.M. (Toronto,
          Ontario time) on the date of determination.

          "Canadian Prime Rate Advance" means a Canadian Borrower Advance made
           ---------------------------
     in Canadian Dollars that bears interest as provided in Section
     2.08(b)(iii).

          "Canadian Security Agreement" has the meaning specified in Section
           ---------------------------
     3.01(g)(xi).
<PAGE>

                                                                               9

          "Capital Expenditures" means, for any Person for any period, the sum
           --------------------
     of, without duplication, (a) all expenditures made, directly or indirectly,
     by such Person or any of its Subsidiaries during such period for equipment,
     fixed assets, real property or improvements, or for replacements or
     substitutions therefor or additions thereto (excluding capitalized
     interest), that have been or should be, in accordance with GAAP, reflected
     as additions to property, plant or equipment on a Consolidated balance
     sheet of such Person plus (b) the aggregate principal amount of all Debt
     (including the aggregate principal amount of Obligations under Capitalized
     Leases) assumed or incurred in connection with any such expenditures;
     provided, however, there shall be excluded from the definition of Capital
     --------  -------
     Expenditures, expenditures made to finance Permitted Acquisitions.

          "Capitalized Leases" means all leases that have been or should be, in
           ------------------
     accordance with GAAP, recorded as capitalized leases.

          "Carryover Amount" has the meaning specified in Section 5.04(d).
           ----------------

          "Cash Equivalents" means any of the following, to the extent owned by
           ----------------
     the Parent Guarantor or any of its Subsidiaries free and clear of all Liens
     other than Liens created under the Collateral Documents or Permitted Liens
     and, other than in the case of investments described in clause (d) below,
     having a maturity of not greater than 180 days from the date of acquisition
     thereof: (a) readily marketable direct obligations of the Government of the
     United States or any agency or instrumentality thereof or obligations
     unconditionally guaranteed by the full faith and credit of the Government
     of the United States, (b) insured certificates of deposit of or time
     deposits with any commercial bank that is a Lender Party or a member of the
     Federal Reserve System, issues (or the parent of which issues) commercial
     paper rated as described in clause (c), is organized under the laws of the
     United States or any State thereof and has combined capital and surplus of
     at least $1 billion, (c) commercial paper in an aggregate amount of no more
     than $250,000 per issuer outstanding at any time, issued by any corporation
     organized under the laws of any State of the United States and rated at
     least "Prime-1" (or the then equivalent grade) by Moody's Investors
     Service, Inc. or "A-1" (or the then equivalent grade) by Standard & Poor's
     Ratings Services, (d) money market or mutual funds that invest in Cash
     Equivalents of the types described in clauses (a), (b) and (c) above or (e)
     in the case of the Canadian Borrower, any equivalent, prudent, short-term
     investment consistent with the foregoing.

          "CERCLA" means the Comprehensive Environmental Response, Compensation
           ------
     and Liability Act of 1980, as amended from time to time.
<PAGE>

                                                                              10

          "CERCLIS" means the Comprehensive Environmental Response, Compensation
           -------
     and Liability Information System maintained by the U.S. Environmental
     Protection Agency.

          "Chase Capital" means Chase Capital Partners ("CCP") and its
           -------------                                 ---
     affiliates, which include any corporation, any general partnership, any
     limited partnership or any limited liability corporation, the beneficial
     interests of which are owned directly or indirectly by one or more present
     or former employees or executives of CCP or the respective Affiliates of
     any of the foregoing entities.

          "Collateral" means all "Collateral" and all "Intellectual Property
           ----------
     Collateral", referred to in the Collateral Documents and all other property
     that is or is intended to be subject to any Lien in favor of the Agent for
     the benefit of the Secured Parties.

          "Collateral Documents" means the Security Agreement, the Canadian
           --------------------
     Security Agreement, the Intellectual Property Security Agreement, the
     Parent Guarantor Security Agreement, the Mortgages and any other agreement
     that creates or purports to create a Lien in favor of the Agent for the
     benefit of the Secured Parties (including, without limitation, any
     agreement executed and delivered pursuant to Section 5.01(m)).

          "Commitment" means a Term A Commitment, a Term B Commitment, a Working
           ----------
     Capital Commitment, a Canadian Commitment, an Acquisition Commitment, a
     Swing Line Commitment or a Letter of Credit Commitment.

          "Confidential Information" means information furnished to the Agent or
           ------------------------
     any Lender Party on a confidential basis by or on behalf of any Loan Party
     and designated as such, but does not include any such information that is
     or becomes generally available to the public (other than through any breach
     of any undertaking hereunder or in connection herewith) or that is or
     becomes available to the Agent or such Lender from a source other than any
     Loan Party, Chase Capital, Chase Securities Inc. or D. George Harris &
     Associates, Inc.

          "Consolidated" refers, with respect to any Person, to the
           ------------
     consolidation of accounts of such Person and its Subsidiaries in accordance
     with GAAP.

          "Conversion", "Convert" and "Converted" each refer to a conversion of
           ----------    -------       ---------
     Advances of one Type into Advances of the other Type pursuant to Section
     2.10, 2.11 or 2.12.

          "Conversion Date" means September 30, 2002.
           ---------------

          "Current Assets" of any Person means all assets of such Person that
           --------------
     would, in accordance with GAAP, be classified as current assets of a
     company conducting a
<PAGE>

                                                                              11

     business the same as or similar to that of such Person, after deducting
     adequate reserves in each case in which a reserve is proper in accordance
     with GAAP.

          "Current Liabilities" of any Person means (a) all Debt of such Person
           -------------------
     that by its terms is payable on demand or matures within one year after the
     date of determination other than Funded Debt and (b) all other items
     (including, without limitation, taxes accrued as estimated and payable
     within twelve months) that in accordance with GAAP would be classified as
     current liabilities of such Person.

          "D. George Harris & Associates Person" shall mean each of D. George
           ------------------------------------
     Harris, Anthony J. Petrocelli, Richard J. Donahue, Donald G. Kilpatrick,
     Richard J. Nick and any other Persons whose shares of stock of USS
     Holdings, Inc. are voted by one or more of D. George Harris, Anthony J.
     Petrocelli and Donald G. Kilpatrick so long as such Persons are associated
     with D. George Harris & Associates, LLC.

          "Debt" of any Person means, without duplication, (a) all indebtedness
           ----
     of such Person for borrowed money, (b) all Obligations of such Person for
     the deferred purchase price of property or services (other than trade
     payables not overdue by more than 90 days incurred in the ordinary course
     of such Person's business), (c) all Obligations of such Person evidenced by
     notes, bonds, debentures or other similar instruments, (d) all Obligations
     of such Person created or arising under any conditional sale or other title
     retention agreement with respect to property acquired by such Person (even
     though the rights and remedies of the seller or lender under such agreement
     in the event of default are limited to repossession or sale of such
     property), (e) all Obligations of such Person as lessee under Capitalized
     Leases, (f) all Obligations, contingent or otherwise, of such Person under
     acceptance, letter of credit or similar facilities, (g) all Obligations of
     such Person to purchase, redeem, retire, defease or otherwise make any
     payment in respect of any capital stock of or other ownership or profit
     interest in such Person or any other Person or any warrants, rights or
     options to acquire such capital stock, valued, in the case of Redeemable
     Preferred Stock, at the greater of its voluntary or involuntary liquidation
     preference plus accrued and unpaid dividends, (h) all Obligations of such
     Person in respect of Hedge Agreements, (i) all Debt of others referred to
     in clauses (a) through (h) above or clause (j) below guaranteed directly or
     indirectly in any manner by such Person, or in effect guaranteed directly
     or indirectly by such Person through an agreement (i) to pay or purchase
     such Debt or to advance or supply funds for the payment or purchase of such
     Debt, (ii) to purchase, sell or lease (as lessee or lessor) property, or to
     purchase or sell services, primarily for the purpose of enabling the debtor
     to make payment of such Debt or to assure the holder of such Debt against
     loss, (iii) to supply funds to or in any other manner invest in the debtor
     (including any agreement to pay for property or services irrespective of
     whether such property is received or such services are rendered) or (iv)
     otherwise to assure a creditor against loss, and (j) all Debt referred to
     in clauses (a) through (i) above of another Person secured by (or for which
     the holder of such Debt has
<PAGE>

                                                                              12

     an existing right, contingent or otherwise, to be secured by) any Lien on
     property (including, without limitation, accounts and contract rights)
     owned by such Person, even though such Person has not assumed or become
     liable for the payment of such Debt.

          "Declining Lender" has the meaning specified in Section 2.07(c).
           ----------------

          "Default" means any Event of Default or any event that would
           -------
     constitute an Event of Default but for the requirement that notice be given
     or time elapse or both.

          "Domestic Lending Office" means, with respect to any Lender Party, the
           -----------------------
     office of such Lender Party specified as its "Domestic Lending Office"
     opposite its name on Schedule I hereto or in the Assignment and Acceptance
     pursuant to which it became a Lender Party, as the case may be, or such
     other office of such Lender Party as such Lender Party may from time to
     time specify to the Borrower and the Agent.

          "Domestic Subsidiary" of the Borrower means any Subsidiary of the
           -------------------
     Borrower organized under the laws of any State of the United States of
     America.

          "Draft" means a blank bill of exchange, within the meaning of the
           -----
     Bills of Exchange Act (Canada), drawn by the Canadian Borrower on any
     Canadian Lender, in substantially the form of Exhibit A-6, and which,
     except as otherwise provided herein, has not been completed or accepted by
     such Lender.

          "Drawing" means the simultaneous acceptance of Drafts and purchase of
           -------
     Bankers' Acceptances by the Canadian Lenders, in accordance with Section
     2.04(a).

          "Drawing Purchase Price" means, with respect to each Bankers'
           ----------------------
     Acceptance to be purchased by any Canadian Lender at any time, the amount
     (adjusted to the nearest whole cent or, if there is no nearest whole cent,
     the next higher whole cent) obtained by dividing (i) the aggregate Face
     Amount of such Bankers' Acceptance, by (ii) the sum of (A) one and (B) the
     product of (1) the BA Rate in effect at such time (expressed as a decimal)
     multiplied by (2) a fraction the numerator of which is the number of days
     -------------
     in the term to maturity of such Bankers' Acceptance and the denominator of
     which is 365 days or 366 days, as the case may be.

          "EBITDA" means, with respect to any Person for any period, the sum,
           ------
     determined on a Consolidated basis, of (a) net income (or net loss) and (b)
     without duplication and to the extent deducted from revenues in determining
     net income (or net loss) for such period, the sum of (i) Interest Expense,
     (ii) income tax expense, (iii) depreciation expense, (iv) amortization
     expense, (v) extraordinary or unusual losses deducted in calculating net
     income less extraordinary or unusual gains added in calculating net income,
     in each case of such Person and its Subsidiaries, determined in accordance
     with
<PAGE>

                                                                              13

     GAAP for such period and (vi) in the case of the Parent Guarantor and its
     Subsidiaries, fees paid pursuant to the Harris Management Agreement;
     provided, however, there shall be excluded from EBITDA, to the extent
     --------  -------
     therein included, all non-cash foreign currency losses and all non-cash
     foreign currency gains.

          "Eligible Assignee" means, with respect to any Facility: (i) a Lender;
           -----------------
     (ii) an Affiliate of a Lender; (iii) a commercial bank organized under the
     laws of the United States, or any State thereof, and having a combined
     capital and surplus of at least $500,000,000; (iv) a savings and loan
     association or savings bank organized under the laws of the United States,
     or any State thereof, and having a combined capital and surplus of at least
     $500,000,000; (v) a commercial bank organized under the laws of any other
     country that is a member of the OECD or has concluded special lending
     arrangements with the International Monetary Fund associated with its
     General Arrangements to Borrow or a political subdivision of any such
     country, and having a combined capital and surplus of at least
     $500,000,000, so long as such bank is acting through a branch or agency
     located in the United States; (vi) a finance company, insurance company or
     other financial institution or fund (whether a corporation, partnership,
     trust or other entity) that is engaged in making, purchasing or otherwise
     investing in commercial loans in the ordinary course of its business and
     having a combined capital and surplus of at least $250,000,000; (vii) any
     Federal Reserve Bank; (viii) in the case of any Lender that is a fund that
     invests in commercial loans, a Related Fund of such Lender; and (ix) any
     other Person approved by the Agent and the Borrower, such approval not to
     be unreasonably withheld or delayed; provided, however, that neither any
                                          --------  -------
     Loan Party nor any Affiliate of a Loan Party shall qualify as an Eligible
     Assignee under this definition; and provided further that, with respect to
                                         -------- -------
     the Canadian Facility, any Person that is not resident in Canada for
     purposes of the Income Tax Act (Canada) shall not qualify as an Eligible
     Assignee under this definition.

          "Environmental Action" means any action, suit, demand, demand letter,
           --------------------
     claim, notice of non-compliance or violation, notice of liability or
     potential liability, investigation, proceeding, consent order or consent
     agreement relating in any way to any Environmental Law, any Environmental
     Permit or Hazardous Material or arising from alleged injury or threat to
     health, safety or the environment, including, without limitation, (a) by
     any governmental or regulatory authority for enforcement, cleanup, removal,
     response, remedial or other actions or damages and (b) by any governmental
     or regulatory authority or third party for damages, contribution,
     indemnification, cost recovery, compensation or injunctive relief.

          "Environmental Law" means any federal, state, local or foreign
           -----------------
     statute, law, ordinance, rule, regulation, code, order, writ, judgment,
     injunction, decree or judicial or agency interpretation, policy or guidance
     relating to pollution or protection of the environment, health, safety or
     natural resources, including, without limitation, those
<PAGE>

                                                                              14

     relating to the use, handling, transportation, treatment, storage,
     disposal, release or discharge of Hazardous Materials.

          "Environmental Permit" means any permit, approval, identification
           --------------------
     number, license or other authorization required under any Environmental
     Law.

          "Equity Contributions" means (a) the contribution by USS Holdings,
           --------------------
     Inc. to the Parent Guarantor of up to $35,000,000 as common equity on or
     prior to the date of the Initial Extension of Credit and (b) the
     contribution by USS Holdings, Inc. to the Parent Guarantor of the Net Cash
     Proceeds of the sale or issuance by USS Holdings, Inc. of capital stock of
     USS Holdings, Inc. to managers and employees of the Parent Guarantor and
     its Subsidiaries in an aggregate amount not in excess of $6,516,000 as
     common equity on or prior to the date that is six months after the Initial
     Extension of Credit.

          "Equivalent" (a) in U.S. Dollars of Canadian Dollars, on any date of
           ----------
     determination, means the equivalent thereof determined by using the quoted
     spot rate at which the Sub-Agent's principal office in Toronto, Ontario
     offers to exchange U.S. Dollars for Canadian Dollars in Toronto, Ontario at
     11:00 A.M. (New York City time) on such date, and (b) in Canadian Dollars
     of U.S. Dollars, on any date of determination means the equivalent thereof
     determined by using the quoted spot rate at which BNP's principal office in
     New York City, New York offers to exchange Canadian Dollars for U.S.
     Dollars in New York City, New York at 11:00 A.M. (New York City time) on
     such date.

          "ERISA" means the Employee Retirement Income Security Act of 1974, as
           -----
     amended from time to time, and the regulations promulgated and rulings
     issued thereunder.

          "ERISA Affiliate" means any Person that for purposes of Title IV of
           ---------------
     ERISA is a member of the controlled group of any Loan Party, or under
     common control with any Loan Party, within the meaning of Section 414 of
     the Internal Revenue Code.

          "ERISA Event" means (a) (i) the occurrence of a reportable event,
           -----------
     within the meaning of Section 4043 of ERISA, with respect to any Plan
     unless the 30-day notice requirement with respect to such event (or the
     penalty for failure to provide such notice) has been waived by the PBGC; or
     (ii) the requirements of subsection (1) of Section 4043(b) of ERISA
     (without regard to subsection (2) of such Section) are met with a
     contributing sponsor, as defined in Section 4001(a)(13) of ERISA, of a
     Plan, and an event described in paragraph (9), (10), (11), (12) or (13) of
     Section 4043(c) of ERISA is reasonably expected to occur with respect to
     such Plan within the following 30 days; (b) the application for a minimum
     funding waiver with respect to a Plan; (c) the provision by the
     administrator of any Plan of a notice of intent to terminate such Plan,
     pursuant to
<PAGE>

                                                                              15

     Section 4041(a)(2) of ERISA (including any such notice with respect to a
     plan amendment referred to in Section 4041(e) of ERISA); (d) the cessation
     of operations at a facility of any Loan Party or any ERISA Affiliate in the
     circumstances described in Section 4062(e) of ERISA; (e) the withdrawal by
     any Loan Party or any ERISA Affiliate from a Multiple Employer Plan during
     a plan year for which it was a substantial employer, as defined in Section
     4001(a)(2) of ERISA; (f) the conditions for imposition of a lien under
     Section 302(f) of ERISA shall have been met with respect to any Plan; (g)
     the adoption of an amendment to a Plan requiring the provision of security
     to such Plan, pursuant to Section 307 of ERISA; or (h) the institution by
     the PBGC of proceedings to terminate a Plan pursuant to Section 4042 of
     ERISA, or the occurrence of any event or condition described in Section
     4042 of ERISA that could reasonably be expected to constitute grounds for
     the termination of, or the appointment of a trustee to administer, such
     Plan.

          "Eurocurrency Liabilities" has the meaning specified in Regulation D
           ------------------------
     of the Board of Governors of the Federal Reserve System, as in effect from
     time to time.

          "Eurodollar Lending Office" means, with respect to any Lender Party,
           -------------------------
     the office of such Lender Party specified as its "Eurodollar Lending
     Office" opposite its name on Schedule I hereto or in the Assignment and
     Acceptance pursuant to which it became a Lender Party (or, if no such
     office is specified, its Domestic Lending Office), or such other office of
     such Lender Party as such Lender Party may from time to time specify to the
     Borrower and the Agent.

          "Eurodollar Rate" means, for any Interest Period for all Eurodollar
           ---------------
     Rate Advances comprising part of the same Borrowing, an interest rate per
     annum equal to the rate per annum obtained by dividing (a) the average of
     the respective rates per annum (rounded upward to the next whole multiple
     of 1/16th of 1%) posted by each of the principal London offices of banks
     posting rates as displayed on the Dow Jones Markets screen, page 3750 or
     such other page as may replace such page on such service for the purpose of
     displaying the London interbank offered rate of major banks for deposits in
     U.S. Dollars, at approximately 11:00 A.M. (London time) two Business Days
     before the first day of such Interest Period for deposits in an amount
     substantially equal to BNP's Eurodollar Rate Advance comprising part of
     such Borrowing to be outstanding during such Interest Period (or, if BNP
     shall not have such Eurodollar Rate Advance, $1,000,000) and for a period
     equal to such Interest Period by (b) a percentage equal to 100% minus the
     Eurodollar Rate Reserve Percentage for such Interest Period.

          "Eurodollar Rate Advance" means an Advance that bears interest as
           -----------------------
     provided in Section 2.08(b)(ii).

          "Eurodollar Rate Reserve Percentage" for any Interest Period for
           ----------------------------------
     all Eurodollar Rate Advances comprising part of the same Borrowing means
     the reserve percentage
<PAGE>

                                                                              16

     applicable two Business Days before the first day of such Interest Period
     under regulations issued from time to time by the Board of Governors of the
     Federal Reserve System (or any successor) for determining the maximum
     reserve requirement (including, without limitation, any emergency,
     supplemental or other marginal reserve requirement) for a member bank of
     the Federal Reserve System in New York City with respect to liabilities or
     assets consisting of or including Eurocurrency Liabilities (or with respect
     to any other category of liabilities that includes deposits by reference to
     which the interest rate on Eurodollar Rate Advances is determined) having a
     term equal to such Interest Period, provided that a Lender Party shall be
                                         --------
     deemed to be subject to such eurocurrency reserve requirements only from
     and after the date that such Lender Party has certified to the Borrower
     that a governmental authority has imposed any such eurocurrency reserve
     requirements subsequent to the date hereof which increase the cost to such
     Lender Party of making or maintaining Eurodollar Rate Advances hereunder.

          "Events of Default" has the meaning specified in Section 6.01.
           -----------------

          "Excess Cash Flow" means, for any period, the sum of (a) pre-tax
           ----------------
     income of the Borrower and its Subsidiaries for such period less
                                                                 ----
     Consolidated income taxes plus (b) an amount equal to the aggregate amount
                               ----
     of all noncash charges (other than non-cash charges included in Current
     Liabilities) deducted in arriving at Consolidated net income (or loss) for
     each such period plus (c) an amount (whether positive or negative) equal to
                      ----
     the change in Consolidated Current Liabilities of the Borrower and its
     Subsidiaries during such period plus (d) the aggregate principal amount of
                                     ----
     all Debt (including the aggregate principal amount of Obligations under
     Capitalized Leases) incurred or assumed during such period to the extent
     that the incurrence or assumption of such Debt constitutes a Capital
     Expenditure less (e) an amount equal to the aggregate amount of all noncash
                 ----
     credits included in arriving at such Consolidated net income (or net loss)
     less (f) an amount (whether positive or negative) equal to the change in
     ----
     Consolidated Current Assets (excluding cash and Cash Equivalents) of the
     Borrower and its Subsidiaries during such period less (g) an amount equal
                                                      ----
     to the amount of all Capital Expenditures of the Borrower and its
     Subsidiaries paid in cash during such period to the extent permitted by
     this Agreement less (h) an amount equal to the aggregate amount of all
                    ----
     regularly scheduled principal payments of Funded Debt made during such
     period, together with any optional prepayments of Term Advances or
     Acquisition Advances made during such period in accordance with Section
     2.07(a), less (i) an amount equal to the aggregate amount of income of the
              ----
     Borrower and its Subsidiaries for such period included in pre-tax income of
     the Borrower and its Subsidiaries for such period resulting from any
     transaction creating Net Cash Proceeds or Extraordinary Receipts.

          "Existing Debt" means the Debt of the Borrower and its Subsidiaries
           -------------
     identified on Schedule 4.01(ee).
<PAGE>

                                                                              17

          "Existing Letters of Credit" means each of the letters of credit
           --------------------------
     referred to on Schedule 1.01 attached hereto.

          "Extraordinary Receipts" means any cash received by or paid to or for
           ----------------------
     the account of any Person not in the ordinary course of business
     constituting pension plan reversions, proceeds of property damage insurance
     (other than proceeds of business interruption insurance to the extent such
     proceeds constitute compensation for lost earnings), condemnation awards
     (and payments in lieu thereof) and indemnity payments (other than proceeds
     to the extent such proceeds constitute compensation for lost earnings);
     provided, however, that an Extraordinary Receipt shall not include cash
     --------  -------
     constituting proceeds of insurance, condemnation awards or indemnity
     payments to the extent that such proceeds are applied within six months
     after the receipt of such proceeds, or in respect of which expenditures
     were previously made, (i) for replacements, substitutions therefor or
     additions thereto for inventory, equipment, fixed assets, real property or
     improvements relating to the property covered by such payments
     (replacements or substitutions to be of such same type of property) or (ii)
     in connection with liabilities covered by such indemnity.

          "Face Amount" means, with respect to any Bankers' Acceptance, the
           -----------
     amount payable to the holder of such Bankers' Acceptance on its then
     existing Maturity Date.

          "Facility" means the Term A Facility, the Term B Facility, the Working
           --------
     Capital Facility, the Canadian Facility, the Acquisition Facility, the
     Swing Line Facility or the Letter of Credit Facility.

          "Federal Funds Rate" means, for any period, a fluctuating interest
           ------------------
     rate per annum equal for each day during such period (i) to the rate
     published by the Telerate service on page five of its daily report as the
     "New York Offered Rate" as of 10:00 A.M. (New York City time) for such day
     (or, if such day is not a Business Day, for the immediately preceding
     Business Day) or (ii) if the Telerate service shall cease to publish or
     otherwise shall not publish such rates for any day that is a Business Day,
     to the weighted average of the rates on overnight Federal funds
     transactions with members of the Federal Reserve System arranged by Federal
     funds brokers, as published for such day (or, if such day is not a Business
     Day, for the next preceding Business Day) by the Federal Reserve Bank of
     New York, or, if such rate is not so published for any day that is a
     Business Day, the average of the quotations for such day for such
     transactions received by the Agent from three Federal funds brokers of
     recognized standing selected by it.

          "Fiscal Year" means a fiscal year of the Parent Guarantor and its
           -----------
     consolidated Subsidiaries ending on December 31 in any calendar year.
<PAGE>

                                                                              18

          "Funded Debt" of any Person at any time means indebtedness for
           -----------
     borrowed amounts of such Person that by its terms matures more than one
     year after the date of creation or matures within one year from such date
     but is renewable or extendible, at the option of such Person, to a date
     more than one year after such date or arises under a revolving credit or
     similar agreement that obligates the lender or lenders to extend credit
     during a period of more than one year after such date, including, without
     limitation, all amounts of Funded Debt of such Person required to be paid
     or prepaid within one year after the date of determination.

          "GAAP" has the meaning specified in Section 1.03.
           ----

          "Harris Management Agreement" means the Management Services Agreement
           ---------------------------
     dated as of October 6, 1998, among USS Holdings, Inc., a Delaware
     corporation, the Parent Guarantor (as assignee of the Borrower), the
     Borrower (as assignee of Silica) and D. George Harris & Associates, LLC, a
     Delaware limited liability company (as successor or assignee of D. George
     Harris & Associates, Inc., a Delaware corporation).

          "Hazardous Materials" means (a) petroleum or petroleum products, by-
           -------------------
     products or breakdown products, radioactive materials, asbestos-containing
     materials, polychlorinated biphenyls and radon gas and (b) any other
     chemicals, materials or substances designated, classified or regulated as
     hazardous or toxic or as a pollutant or contaminant under any Environmental
     Law.

          "Hedge Agreements" means interest rate swap, cap or collar agreements,
           ----------------
     interest rate future or option contracts, currency swap agreements,
     currency future or option contracts and other similar agreements.

          "Hedge Bank" means any Lender Party (or any Affiliate thereof) in its
           ----------
     capacity as a party to a Bank Hedge Agreement.

          "Home Jurisdiction Withholding Taxes" means (a) in the case of the
           -----------------------------------
     Borrower or any Subsidiary Guarantor, withholding taxes imposed by the
     United States, and (b) in the case of the Canadian Borrower, withholding
     taxes imposed by Canada.

          "Indemnified Party" has the meaning specified in Section 8.04(b).
           -----------------

          "Initial Extension of Credit" means the earlier to occur of the
           ---------------------------
     initial Borrowing, the initial issuance of a Letter of Credit or the
     initial Drawing hereunder, which in no event shall occur later than October
     1, 1999.

          "Initial Lenders" has the meaning specified in the recital of parties
           ---------------
     to this Agreement.
<PAGE>

                                                                              19

          "Insufficiency" means, with respect to any Plan, the excess, if any,
           -------------
     of the accumulated benefit obligation (within the meaning of Statement of
     Financial Accounting Standards No. 87) over the fair market value of the
     Plan's assets, determined as of the most recent annual actuarial valuation
     date for the Plan.

          "Intellectual Property Security Agreement" has the meaning specified
           ----------------------------------------
     in Section 3.01(g)(xiii).

          "Interest Coverage Ratio" means, with respect to any Person for any
           -----------------------
     Rolling Period, the ratio of (a) EBITDA of such Person and its Subsidiaries
     for such Rolling Period to (b) Interest Expense of such Person and its
     Subsidiaries for such Rolling Period.

          "Interest Expense" means, with respect to any Person for any period,
           ----------------
     the amount by which (i) interest expense (including the interest component
     on obligations under Capitalized Leases (but excluding, to the extent
     applicable, interest expense accrued under the agreement, dated August 8,
     1995, between Silica and ITT Corporation, as in effect from time to time)),
     whether paid or accrued, on all Debt of such Person and its Subsidiaries
     for such period, including, without limitation and without duplication, (a)
     interest expense in respect of Debt resulting from Advances, (b)
     commissions, discounts and other fees and charges payable in connection
     with letters of credit (including, without limitation, any Letters of
     Credit), (c) interest which is capitalized in accordance with GAAP, (d)
     interest expense in respect of the Subordinated Debt and (e) any net
     payment payable in connection with Hedge Agreements less the sum of any net
                                                         ----
     credits received in connection with Hedge Agreements exceeds (ii) interest
     income, whether paid or accrued of such Person for such period.

          "Interest Period" means, for each Eurodollar Rate Advance comprising
           ---------------
     part of the same Borrowing, the period commencing on the date of such
     Eurodollar Rate Advance or the date of the Conversion of any Base Rate
     Advance into such Eurodollar Rate Advance, and ending on the last day of
     the period selected by the Borrower pursuant to the provisions below and,
     thereafter, each subsequent period commencing on the last day of the
     immediately preceding Interest Period and ending on the last day of the
     period selected by the Borrower pursuant to the provisions below. The
     duration of each such Interest Period shall be one, two, three or six
     months, as the Borrower may, upon notice received by the Agent not later
     than 11:00 A.M. (New York City time) on the third Business Day prior to the
     first day of such Interest Period, select; provided, however, that:
                                                --------  -------

               (a)  the Borrower may not select any Interest Period with respect
          to any Eurodollar Rate Advance under a Facility that ends after any
          principal repayment installment date for such Facility unless, after
          giving effect to such selection, the
<PAGE>

                                                                              20

          aggregate principal amount of Base Rate Advances and of Eurodollar
          Rate Advances having Interest Periods that end on or prior to such
          principal repayment installment date for such Facility shall be at
          least equal to the aggregate principal amount of Advances under such
          Facility due and payable on or prior to such date;

               (b)  Interest Periods commencing on the same date for Eurodollar
          Rate Advances comprising part of the same Borrowing shall be of the
          same duration;

               (c)  whenever the last day of any Interest Period would otherwise
          occur on a day other than a Business Day, the last day of such
          Interest Period shall be extended to occur on the next succeeding
          Business Day; provided, however, that, if such extension would cause
                        --------  -------
          the last day of such Interest Period to occur in the next following
          calendar month, the last day of such Interest Period shall occur on
          the immediately preceding Business Day; and

               (d)  whenever the first day of any Interest Period occurs on a
          day of an initial calendar month for which there is no numerically
          corresponding day in the calendar month that succeeds such initial
          calendar month by the number of months equal to the number of months
          in such Interest Period, such Interest Period shall end on the last
          Business Day of such succeeding calendar month.

          "Internal Revenue Code" means the Internal Revenue Code of 1986, as
           ---------------------
     amended from time to time and applicable U.S. Treasury Regulations
     promulgated thereunder.

          "Inventory" means all Inventory referred to in Section 1(b) of the
           ---------
     Security Agreement.

          "Investment" in any Person means any loan or advance to such Person,
           ----------
     any purchase or other acquisition of any evidences of indebtedness, capital
     stock or other ownership or profit interest, warrants, rights, options,
     obligations or other securities or all or substantially all the assets of
     or a business unit or division of such Person, any capital contribution to
     such Person or any other investment in such Person, including, without
     limitation, any arrangement pursuant to which the investor incurs Debt of
     the types referred to in clause (i) or (j) of the definition of "Debt" in
                                                                      ----
     respect of such Person.

          "IRS" has the meaning specified in Section 2.14(e).
           ---

          "Issuing Bank" means BNP, as issuing bank under the Existing Letters
           ------------
     of Credit and as Initial Issuing Bank hereunder and each Eligible Assignee
     to which a Letter of Credit Commitment hereunder has been assigned pursuant
     to Section 8.07(b).
<PAGE>

                                                                              21

          "L/C Cash Collateral Account" has the meaning specified in the
           ---------------------------
     Security Agreement.

          "L/C Related Documents" has the meaning specified in Section
           ---------------------
     2.05(e)(ii)(A).

          "Lender Party" means any Lender, the Swing Line Bank or the Issuing
           ------------
     Bank.

          "Lenders" means the Initial Lenders and each Person that shall become
           -------
     a Lender hereunder pursuant to Section 8.07.

          "Letter of Credit" means (i) each Existing Letter of Credit, and (ii)
           ----------------
     each letter of credit issued pursuant to Section 2.01(g) hereof.

          "Letter of Credit Advance" means an advance made by the Issuing Bank
           ------------------------
     or any Working Capital Lender pursuant to Section 2.03(c).

          "Letter of Credit Agreement" has the meaning specified in Section
           --------------------------
     2.03(a).

          "Letter of Credit Commitment" means, with respect to the Issuing Bank
           ---------------------------
     at any time, the amount set forth opposite such Issuing Bank's name on
     Schedule I hereto under the caption "Letter of Credit Commitment" or, if
     such Issuing Bank has entered into an Assignment and Acceptances, set forth
     for such Issuing Bank in the Register maintained by the Agent pursuant to
     Section 8.07(e) as such Issuing Bank's "Letter of Credit Commitment", as
     such amount may be reduced at or prior to such time pursuant to Section
     2.06.

          "Letter of Credit Facility" means, at any time, an amount equal to the
           -------------------------
     aggregate amount of the Issuing Bank's Letter of Credit Commitment at such
     time which shall not exceed $12,000,000.

          "Leverage Ratio" means, with respect to any Person at any date of
           --------------
     determination, the ratio of (a) Funded Debt (other than contingent
     obligations of the type described in clause (f) or (h) in the definition of
     "Debt") of such Person and its Subsidiaries to (b) Adjusted EBITDA of such
      ----
     Person and its Subsidiaries for the most recently completed Rolling Period
     prior to such date multiplied by the Annualization Factor.

          "Lien" means any lien, security interest or other charge or
           ----
     encumbrance of any kind, or any other type of preferential arrangement,
     including, without limitation, the lien or retained security title of a
     conditional vendor and any easement, right of way or other encumbrance on
     title to real property.
<PAGE>

                                                                              22

          "Loan Documents" means (a) for purposes of this Agreement and the
           --------------
     Notes, if any, and any amendment or modification hereof or thereof and for
     all other purposes other than for purposes of the Parent Guaranty, the
     Subsidiary Guaranty and the Collateral Documents, (i) this Agreement, (ii)
     the Notes, if any, (iii) the Collateral Documents, (iv) each Letter of
     Credit Agreement, (v) the Parent Guaranty, (vi) the Bankers' Acceptances
     and (vii) the Subsidiary Guaranty, and (b) for purposes of the Parent
     Guaranty, the Subsidiary Guaranty and the Collateral Documents, (i) this
     Agreement, (ii) the Notes, if any, (iii) the Collateral Documents, (iv)
     each Letter of Credit Agreement, (v) the Parent Guaranty, (vi) the
     Subsidiary Guaranty, (vii) the Bankers' Acceptances and (viii) each Bank
     Hedge Agreement, in each case as amended or otherwise modified from time to
     time.

          "Loan Parties" means the Borrower, the Canadian Borrower, the Parent
           ------------
     Guarantor, each Subsidiary Guarantor and each further Subsidiary of the
     Borrower that may become a guarantor or collateral grantor pursuant to
     Section 5.01(m) or Section 5.01(n).

          "Margin Stock" has the meaning specified in Regulation U.
           ------------

          "Material Adverse Change" means any material adverse change in the
           -----------------------
     business, condition (financial or otherwise), operations, performance,
     properties or prospects of the Borrower and its Subsidiaries, taken as a
     whole, or the Acquired Businesses, taken as a whole, as the context
     requires.

          "Material Adverse Effect" means a material adverse effect on (a) the
           -----------------------
     business, condition (financial or otherwise), operations, performance,
     properties or prospects of the Parent Guarantor and its Subsidiaries, taken
     as a whole, (b) the rights and remedies of the Agent or the Lender Parties,
     taken as a whole, under any Loan Document or (c) the ability of the Parent
     Guarantor and its Subsidiaries, taken as a whole, to perform their
     Obligations under any Loan Document to which they are or are to be a party.

          "Material Lease" has the meaning specified in Section 4.01(hh).
           --------------

          "Maturity Date" means, for each Bankers' Acceptance comprising part of
           -------------
     the same Drawing, the date on which the Face Amount for such Bankers'
     Acceptance becomes due and payable in accordance with the provisions set
     forth below, which shall be a Canadian Business Day occurring thirty, sixty
     or ninety days or, if available to all Canadian Lenders purchasing Bankers'
     Acceptances in connection with the applicable Drawing, one hundred and
     eighty days after the date on which such Bankers' Acceptance is created and
     purchased as part of any Drawing, as the Canadian Borrower may select upon
     notice received by the Agent not later than 12:00 noon (New York City time)
     on a Canadian Business Day at least two Canadian Business Days prior to the
     date on which such
<PAGE>

                                                                              23

     Bankers' Acceptance is to be accepted and purchased (whether as a new
     Drawing, by renewal or by Conversion); provided, however, that:
                                            --------  -------

               (a)  such Borrower may not select any Maturity Date for any
          Bankers' Acceptance that occurs after the then scheduled Termination
          Date;

               (b)  the Maturity Date for all Bankers' Acceptances comprising
          part of the same Drawing shall occur on the same date; and

               (c)  whenever the Maturity Date for any Bankers' Acceptance would
          otherwise occur on a day other than a Canadian Business Day, such
          Maturity Date shall be extended to occur on the next succeeding
          Canadian Business Day.

          "Mortgage" has the meaning set forth in Section 3.01(g)(xiv).
           --------

          "Mortgage Policy" has the meaning specified in Section
           ---------------
     3.01(g)(xiv)(A).

          "Multiemployer Plan" means a multiemployer plan, as defined in Section
           ------------------
     4001(a)(3) of ERISA, to which any Loan Party or any ERISA Affiliate is
     making or accruing an obligation to make contributions, or has within any
     of the preceding five plan years made or accrued an obligation to make
     contributions.

          "Multiple Employer Plan" means a single employer plan, as defined in
           ----------------------
     Section 4001(a)(15) of ERISA, that (a) is maintained for employees of any
     Loan Party or any ERISA Affiliate and at least one Person other than the
     Loan Parties and the ERISA Affiliates or (b) was so maintained and in
     respect of which any Loan Party or any ERISA Affiliate could have liability
     under Section 4064 or 4069 of ERISA in the event such plan has been or were
     to be terminated.

          "Natural Gas Hedge Agreement" means any Hedge Agreements entered into
           ---------------------------
     by a Loan Party pursuant to Section 5.02(b)(ii) hereof.

          "Net Cash Proceeds" means, with respect to any sale, lease, transfer
           -----------------
     or other disposition of any asset or the sale or issuance of any Debt or
     capital stock or other ownership or profit interest, any securities
     convertible into or exchangeable for capital stock or other ownership or
     profit interest or any warrants, rights, options or other securities to
     acquire capital stock or other ownership or profit interest by any Person,
     or any Extraordinary Receipt received by or paid to or for the account of
     any Person, the aggregate amount of cash received from time to time
     (whether as initial consideration or through payment or disposition of
     deferred consideration) by or on behalf of such Person in connection with
     such transaction after deducting therefrom only (without duplication) (a)
     the reasonable and customary out-of-pocket expenses incurred by any Loan
     Party in
<PAGE>

                                                                              24

     connection therewith, including, but not limited to, brokerage commissions,
     underwriting fees and discounts, legal fees, finder's fees and other
     similar fees and commissions, (b) the amount of taxes payable in connection
     with or as a result of such transaction, (c) the amount of any Debt secured
     by a Lien on such asset that, by the terms of such transaction, is required
     to be repaid in connection with such transaction and (d) the provision for
     cash reserves with respect to any liabilities associated with such assets,
     in each case to the extent, but only to the extent, that the amounts so
     deducted are properly attributable to such transaction or to the asset that
     is the subject thereof.

          "Nicks Silica Company Notes" means the promissory note and consulting
           --------------------------
     agreement of Silica issued in connection with the acquisition by Silica of
     certain assets of Nicks Silica Company in an aggregate amount of
     $1,950,000, payable during Fiscal Year 1999 through Fiscal Year 2007.

          "Note" means a Term Note, a Working Capital Note, a Canadian Borrower
           ----
     Note or an Acquisition Note, in each case to the extent required to be
     issued pursuant to Section 2.17.

          "Notice of Borrowing" has the meaning specified in Section 2.02(a).
           -------------------

          "Notice of Drawing" has the meaning specified in Section 2.04(a).
           -----------------

          "Notice of Issuance" has the meaning specified in Section 2.03(a).
           ------------------

          "NPL" means the National Priorities List under CERCLA.
           ---

          "Obligation" means, with respect to any Person, any payment,
           ----------
     performance or other obligation of such Person of any kind, including,
     without limitation, any liability of such Person on any claim, whether or
     not the right of any creditor to payment in respect of such claim is
     reduced to judgment, liquidated, unliquidated, fixed, contingent, matured,
     disputed, undisputed, legal, equitable, secured or unsecured, and whether
     or not such claim is discharged, stayed or otherwise affected by any
     proceeding referred to in Section 6.01(f).  Without limiting the generality
     of the foregoing, the Obligations of the Loan Parties under the Loan
     Documents include (a) the obligation to pay principal, interest, Letter of
     Credit commissions, charges, expenses, fees, attorneys' fees and
     disbursements, indemnities and other amounts payable by any Loan Party
     under any Loan Document and (b) the obligation of any Loan Party to
     reimburse any amount in respect of any of the foregoing that any Lender
     Party, in its sole discretion, may elect to pay or advance on behalf of
     such Loan Party.

          "OECD" means the Organization for Economic Cooperation and
           ----
     Development.
<PAGE>

                                                                              25

          "Open Year" has the meaning specified in Section 4.01(z).
           ---------

          "Other Taxes" has the meaning specified in Section 2.14(b).
           -----------

          "Parent Guarantor" has the meaning specified in the recital of parties
           ----------------
     to this Agreement.

          "Parent Guarantor Security Agreement" has the meaning specified in
           -----------------------------------
     Section 3.01(g)(xii).

          "Parent Guaranty" has the meaning specified in Section 3.01(g)(xv).
           ---------------

          "PBGC" means the Pension Benefit Guaranty Corporation.
           ----

          "Permitted Acquisition" means the purchase or acquisition of all or
           ---------------------
     substantially all of the assets of or a business unit or division of or
     the privately held capital stock of a Person engaged in a similar line of
     business as the Borrower and its Subsidiaries.

          "Permitted Encumbrances" means the Liens disclosed in the Mortgage
           ----------------------
     Policies.

          "Permitted Liens" means such of the following as to which no
           ---------------
     enforcement, collection, execution, levy or foreclosure proceedings shall
     have been commenced:  (a) Liens for taxes, assessments and governmental
     charges or levies to the extent not required to be paid under Section
     5.01(b) hereof; (b) Liens imposed by law, such as materialmen's,
     mechanics', carriers', workmen's and repairmen's Liens and other similar
     Liens arising in the ordinary course of business securing obligations that
     (i) are not overdue for a period of more than 90 days and (ii) either
     individually or when aggregated with all other Permitted Liens outstanding
     on any date of determination, do not materially affect the use or value of
     the property to which they relate; (c) pledges or deposits to secure the
     performance of bids, trade contracts (other than for borrowed money),
     leases, surety and appeal bonds, performance bonds and other obligations of
     a like nature incurred in the ordinary course of business, to secure
     obligations under worker's compensation laws or similar legislation or to
     secure public or statutory obligations;  (d) easements, rights of way,
     defects and other encumbrances on title to real property that do not
     materially adversely affect the use of such property for its present
     purposes; (e) deed restrictions and other encumbrances on title to real
     property that do not, individually or in the aggregate, materially
     interfere with the business of the Borrower or any of its Subsidiaries; and
     (f) Liens arising under Canadian law or the law of any political
     subdivision thereof, imposed on assets owned by the Canadian Borrower or
     any of its Subsidiaries, in respect of wages, employee deductions, sales
     taxes, goods and service taxes, excise taxes, worker's compensation,
     pension fund obligations and overdue rents.
<PAGE>

                                                                              26

               "Person" means an individual, partnership, corporation (including
                ------
     a business trust), limited liability company, joint stock company, trust,
     unincorporated association, joint venture or other entity, or a government
     or any political subdivision or agency thereof.

               "Plan" means a Single Employer Plan or a Multiple Employer Plan.
                ----

               "Preferred Stock" means, with respect to any corporation, capital
                ---------------
     stock issued by such corporation that is entitled to a preference or
     priority over any other capital stock issued by such corporation upon any
     distribution of such corporation's assets, whether by dividend or upon
     liquidation.

               "Prepayment Amount" has the meaning specified in Section 5.03(a).
                -----------------

               "Prepayment Date" has the meaning specified in Section 5.03(a).
                ---------------

               "Prepayment Notice" has the meaning specified in Section 5.03(a).
                -----------------

               "Pro Rata Share" of any amount means, with respect to any Working
                --------------
     Capital Lender at any time, the product of such amount times a fraction the
                                                            -----
     numerator of which is the amount of such Lender's Working Capital
     Commitment at such time and the denominator of which is the Working Capital
     Facility at such time.

               "Purchase Agreement" means that certain Purchase Agreement dated
                ------------------
     as of August 26, 1999 and entered into by and among CATS, Inc., a
     Pennsylvania corporation, JHS Family Partnership, a Pennsylvania limited
     partnership, RSS Family Partnership, a Pennsylvania limited partnership,
     the Dell H. Shearer Grandchildren's Trust, Joseph H. Shearer, R. Scott
     Shearer and Silica.

               "Redeemable" means, with respect to any capital stock or other
                ----------
     ownership or profit interest, Debt or other right or Obligation, any such
     right or Obligation that (a) the issuer has undertaken to redeem at a fixed
     or determinable date or dates, whether by operation of a sinking fund or
     otherwise, or upon the occurrence of a condition not solely within the
     control of the issuer or (b) is redeemable at the option of the holder.

               "Reduction Amount" has the meaning specified in Section
                ----------------
     2.07(b)(v).

               "Register" has the meaning specified in Section 8.07(e).
                --------

               "Regulation U" means Regulation U of the Board of Governors of
                ------------
     the Federal Reserve System, as in effect from time to time.
<PAGE>

                                                                              27

               "Related Documents" means the Purchase Agreement, the Harris
                -----------------
     Management Agreement and the Tax Sharing Agreement.

               "Related Fund" means, with respect to any Lender that is a fund
                ------------
     that invests in commercial loans, any other fund that invests in commercial
     loans and is managed or advised by the same investment advisor as such
     Lender or by an Affiliate of such investment advisor.

               "Required Lenders" means, at any time, Lenders owed or holding at
                ----------------
     least 51% of the sum of (a) the aggregate principal amount of the Advances
     outstanding at such time, (b) the aggregate Available Amount of all Letters
     of Credit outstanding at such time, (c) the aggregate Face Amount of all
     Bankers' Acceptances outstanding at such time, (d) the aggregate unused
     portion of the Commitments under the Term A and the Term B Facilities at
     such time, (e) the aggregate Unused Canadian Commitments at such time, (f)
     the aggregate Unused Acquisition Commitments at such time and (g) the
     aggregate Unused Working Capital Commitments at such time.  For purposes of
     this definition, the aggregate principal amount of Swing Line Advances
     owing to the Swing Line Bank and of Letter of Credit Advances owing to any
     Issuing Bank and the Available Amount of each Letter of Credit shall be
     considered to be owed to the Working Capital Lenders ratably in accordance
     with their respective Working Capital Commitments.

               "Responsible Officer" means any executive officer of any Loan
                -------------------
     Party or any of its Subsidiaries.

               "Rolling Period" means (a) with respect to any fiscal month of
                --------------
     the Parent Guarantor ending prior to the first anniversary of the date of
     the Initial Extension of Credit, the period commencing on the date of the
     Initial Extension of Credit and ending on the last day of such fiscal month
     and (b) with respect to any fiscal month of the Parent Guarantor ending
     thereafter, the consecutive 12 fiscal month period ending on the last day
     of such fiscal month.

               "Secured Obligations" has the meaning specified in the Security
                -------------------
     Agreement.

               "Secured Parties" means the Agent, the Sub-Agent, the Lender
                ---------------
     Parties, the Hedge Banks and the other Persons the Obligations owing to
     which are or are purported to be secured by the Collateral under the terms
     of the Collateral Documents.

               "Security Agreement" has the meaning specified in Section
                ------------------
     3.01(g)(x).

               "Silica" means U. S. Silica Company, a Delaware corporation that
                ------
     is a wholly-owned Subsidiary of the Borrower.
<PAGE>

                                                                              28

               "Single Employer Plan" means a single employer plan, as defined
                --------------------
     in Section 4001(a)(15) of ERISA, that (a) is maintained for employees of
     any Loan Party or any ERISA Affiliate and no Person other than the Loan
     Parties and the ERISA Affiliates or (b) was so maintained and in respect of
     which any Loan Party or any ERISA Affiliate could have liability under
     Section 4069 of ERISA in the event such plan has been or were to be
     terminated.

               "Sold Entity or Business" has the meaning specified in the
                -----------------------
     definition of the term "Adjusted EBITDA".
                             ---------------

               "Solvent" and "Solvency" mean, with respect to any Person on a
                -------       --------
     particular date, that on such date (a) the fair value of the property of
     such Person is greater than the total amount of liabilities, including,
     without limitation, contingent liabilities, of such Person, (b) the present
     fair salable value of the assets of such Person is not less than the amount
     that will be required to pay the probable liability of such Person on its
     debts as they become absolute and matured, (c) such Person does not intend
     to, and does not believe that it will, incur debts or liabilities beyond
     such Person's ability to pay such debts and liabilities as they mature and
     (d) such Person is not engaged in business or a transaction, and is not
     about to engage in business or a transaction, for which such Person's
     property would constitute an unreasonably small capital.  The amount of
     contingent liabilities at any time shall be computed as the amount that, in
     the light of all the facts and circumstances existing at such time,
     represents the amount that can reasonably be expected to become an actual
     or matured liability.

               "Stamping Fee" means, with respect to each Bankers' Acceptance,
                ------------
     an amount equal to (a) the Applicable Margin, as in effect on the date of
     the Drawing or renewal, as the case may be, of such Bankers' Acceptance

     multiplied by (b) the Face Amount of such Bankers' Acceptance, calculated
     -------------
     on the basis of the term to maturity of such Bankers' Acceptance and a year
     of 365 days or 366 days, as the case may be.

               "Standby Letter of Credit" means any Letter of Credit issued
                ------------------------
     under the Letter of Credit Facility, other than a Trade Letter of Credit.

               "Sub-Agent" means Banque Nationale de Paris (Canada).
                ---------

               "Subordinated Debt"  means (a) the Subordinated Notes and the
                -----------------
     Subordinated Exchange Notes in an aggregate principal amount at any time
     not to exceed $150,000,000 and (b) the Debt represented thereby.

               "Subordinated Debt Documents" means any indenture under which the
                ---------------------------
     Subordinated Debt is issued and all other instruments, agreements and other
     documents evidencing or governing the Subordinated Debt or providing for
     any guaranty or other
<PAGE>

                                                                              29

     right in respect thereof (excluding the Registration Rights Agreement and
     the Underwriting Agreement prepared in connection with the issuance of the
     Subordinated Notes).

               "Subordinated Exchange Notes"  means the senior subordinated
                ---------------------------
     notes to be issued by the Borrower in exchange for Subordinated Notes on
     terms substantially identical to the terms of the Subordinated Notes.

               "Subordinated Notes" means the senior subordinated notes to be
                ------------------
     issued by the Borrower in a public offering or in a Rule 144A or other
     private placement on or prior to the Initial Extension of Credit in the
     aggregate principal amount of $150,000,000.

               "Subsidiary" of any Person means any corporation, partnership,
                ----------
     joint venture, limited liability company, trust or estate of which (or in
     which) more than 50% of (a) the issued and outstanding capital stock having
     ordinary voting power to elect a majority of the Board of Directors of such
     corporation (irrespective of whether at the time capital stock of any other
     class or classes of such corporation shall or might have voting power upon
     the occurrence of any contingency), (b) the interest in the capital or
     profits of such limited liability company, partnership or joint venture or
     (c) the beneficial interest in such trust or estate is at the time directly
     or indirectly owned or controlled by such Person, by such Person and one or
     more of its other Subsidiaries or by one or more of such Person's other
     Subsidiaries.

               "Subsidiary Guarantor" means each direct or indirect wholly-owned
                --------------------
     Domestic Subsidiary of the Borrower listed on Schedule II hereto and each
     other direct or indirect wholly-owned Domestic Subsidiary of the Borrower
     that shall be required to execute and deliver a guaranty pursuant to
     Section 5.01(n).

               "Subsidiary Guaranty" has the meaning specified in Section
                -------------------
     3.01(g)(xvi).

               "Surviving Debt" has the meaning specified in Section 3.01(f).
                --------------

               "Swing Line Advance" means an advance made by (a) the Swing Line
                ------------------
     Bank pursuant to Section 2.01(f) or (b) any Working Capital Lender pursuant
     to Section 2.02(b).

               "Swing Line Bank" means BNP.
                ---------------

               "Swing Line Borrowing" means a borrowing consisting of a Swing
                --------------------
     Line Advance made by the Swing Line Bank pursuant to Section 2.01(f) or the
     Working Capital Lenders pursuant to Section 2.02(b).
<PAGE>

                                                                              30

               "Swing Line Commitment" means, with respect to the Swing Line
                ---------------------
     Bank at any time, the amount set forth opposite the Swing Line Bank's name
     on Schedule I hereto under the caption "Swing Line Commitment" or, if the
     Swing Line Bank has entered into an Assignment and Acceptance, set forth
     for the Swing Line Bank in the Register maintained by the Agent pursuant to
     Section 8.07(e) as the Swing line Bank's "Swing Line Commitment", as such
     amount may be reduced at or prior to such time pursuant to Section 2.06.

               "Swing Line Facility" has the meaning specified in Section
                -------------------
     2.01(f).

               "Tax Sharing Agreement" means the Amended and Restated Tax
                ---------------------
     Sharing Agreement dated as of July 21, 1998 among the Parent Guarantor, USS
     Holdings, Inc. and all of the Domestic Subsidiaries of the Parent Guarantor
     in form and substance satisfactory to the Agent pursuant to Section
     3.01(b).

               "Taxes" has the meaning specified in Section 2.14(a).
                -----

               "Term A Advance" has the meaning specified in Section 2.01(a).
                --------------

               "Term A Borrowing" means a borrowing consisting of simultaneous
                ----------------
     Term A Advances of the same Type made by the Term A Lenders, made,
     converted or continued on the same date and, in the case of Eurodollar Rate
     Advances, as to which a single Interest Period is in effect.

               "Term A Commitment" means, with respect to any Term Lender at any
                -----------------
     time, the amount set forth opposite such Term Lender's name on Schedule I
     hereto under the caption "Term A Commitment" or, if such Term Lender has
     entered into one or more Assignments and Acceptances, the aggregate amount
     set forth for such Term Lender in the Register maintained by the Agent
     pursuant to Section 8.07(e) as such Term Lender's "Term A Commitment".

               "Term A Facility" means, at any time, the aggregate amount of the
                ---------------
     Term Lenders' Term A Commitments at such time.

               "Term A Lender" means any Lender that has a Term A Commitment.
                -------------

               "Term Advance" means a Term A Advance or a Term B Advance.
                ------------

               "Term B Advance" has the meaning specified in Section 2.01(b).
                --------------

               "Term B Borrowing" means a borrowing consisting of simultaneous
                ----------------
     Term B Advances of the same Type made by the Term B Lenders, made,
     converted or continued
<PAGE>

                                                                              31

     on the same date and, in the case of Eurodollar Rate Advances, as to which
     a single Interest Period is in effect.

               "Term B Commitment" means, with respect to any Term Lender, the
                -----------------
     amount set forth opposite such Term Lender's name on Schedule I hereto
     under the caption "Term B Commitment" or, if such Term Lender has entered
     into one or more Assignments or Acceptances, the aggregate amount set forth
     for such Term Lender in the Register maintained by the Agent pursuant to
     Section 8.07(e) as such Term Lender's "Term B Commitment".

               "Term B Facility" means, at any time, the aggregate amount of the
                ---------------
     Term Lenders' Term B Commitments at such time.

               "Term B Lender" means any Lender that has a Term B Commitment.
                -------------

               "Term Borrowing" means a Term A Borrowing or a Term B Borrowing.
                --------------

               "Term Commitment" means a Term A Commitment or a Term B
                ---------------
     Commitment.

               "Term Lender" means a Term A Lender or a Term B Lender.
                -----------

               "Term Notes" means promissory notes of the Borrower payable to
                ----------
     the order of any Lender, in substantially the form of Exhibits A-1 and A-2
     hereto, evidencing the indebtedness of the Borrower to such Lender
     resulting from the Term A Advances and Term B Advances, respectively, made
     by such Lender, to the extent required to be issued pursuant to Section
     2.17.

               "Termination Date" means (a) with respect to the Term B Facility,
                ----------------
     the earlier of September 30, 2007 and the date of termination in whole of
     the Term B Commitments pursuant to Section 2.06 or 6.01, and (b) with
     respect to each other Facility hereunder, the earlier of September 30, 2005
     and the date of termination in whole of the Term A Commitments, the
     Canadian Commitments, the Acquisition Commitments, the Swing Line
     Commitments, the Working Capital Commitments and the Letter of Credit
     Commitments pursuant to Section 2.06 or 6.01.

               "Total Leverage Ratio" means "Consolidated Leverage Ratio" as
                --------------------
     defined in the Subordinated Debt Documents as in effect on October 1, 1999.

               "Trade Letter of Credit" means any Letter of Credit that is
                ----------------------
     issued under the Letter of Credit Facility for the benefit of a supplier of
     Inventory to the Borrower or any of its Subsidiaries to effect payment for
     such Inventory.
<PAGE>

                                                                              32

               "Type" refers to the distinction between Advances (other than
                ----
     Canadian Borrower Advances) bearing interest at the Base Rate and such
     Advances bearing interest at the Eurodollar Rate.

               "Unused Acquisition Commitment" means, with respect to any
                -----------------------------
     Acquisition Lender at any time prior to the Conversion Date, such Lender's
     Acquisition Commitment at such time minus the aggregate principal amount of
                                         -----
     all Acquisition Advances made by such Lender and outstanding at such time.

               "Unused Canadian Commitment" means, with respect to any Canadian
                --------------------------
     Lender at any time, (a) such Lender's Canadian Commitment at such time
     minus (b) the sum of (i) the aggregate principal amount of all Canadian
     -----
     Borrower Advances made by such Lender at such time, plus (ii) the aggregate
                                                         ----
     Face Amount of all Bankers' Acceptances created and purchased by such
     Lender and outstanding at such time.

               "Unused Working Capital Commitment" means, with respect to any
                ---------------------------------
     Working Capital Lender at any time, (a) such Lender's Working Capital
     Commitment at such time minus (b) the sum of (i) the aggregate principal
                             -----
     amount of all Working Capital Advances, Letter of Credit Advances and Swing
     Line Advances made by such Lender (in its capacity as a Lender) and
     outstanding at such time, plus (ii) such Lender's Pro Rata Share of (A) the
                               ----
     aggregate Available Amount of all Letters of Credit outstanding at such
     time, (B) the aggregate principal amount of all Letter of Credit Advances
     made by the Issuing Bank pursuant to Section 2.03(c) and outstanding at
     such time, and (C) the aggregate principal amount of all Swing Line
     Advances made by the Swing Line Bank pursuant to Section 2.01(f) and
     outstanding at such time.

               "U.S. Dollars" and the sign "$" each means lawful money of the
                ------------                -
     United States of America.

               "Voting Stock" means capital stock issued by a corporation, or
                ------------
     equivalent interests in any other Person, the holders of which are
     ordinarily, in the absence of contingencies, entitled to vote for the
     election of directors (or persons performing similar functions) of such
     Person, even if the right so to vote has been suspended by the happening of
     such a contingency.

               "Welfare Plan" means a welfare plan, as defined in Section 3(1)
                ------------
     of ERISA, that is maintained for employees of any Loan Party or in respect
     of which any Loan Party could have a liability.

               "Withdrawal Liability" has the meaning specified in Part I of
                --------------------
     Subtitle E of Title IV of ERISA.

               "Working Capital Advance" has the meaning specified in Section
                -----------------------
     2.01(c).
<PAGE>

                                                                              33

               "Working Capital Borrowing" means a borrowing consisting of
                -------------------------
     simultaneous Working Capital Advances of the same Type made by the Working
     Capital Lenders, made, converted or continued on the same date and, in the
     case of Eurodollar Rate Advances, as to which a single Interest Period is
     in effect.

               "Working Capital Commitment" means, with respect to any Working
                --------------------------
     Capital Lender at any time, the amount set forth opposite such Lender's
     name on Schedule I hereto under the caption "Working Capital Commitment"
     or, if such Lender has entered into one or more Assignments and
     Acceptances, set forth for such Lender in the Register maintained by the
     Agent pursuant to Section 8.07(e) as such Lender's "Working Capital
     Commitment", as such amount may be reduced at or prior to such time
     pursuant to Section 2.06.

               "Working Capital Facility" means, at any time, the aggregate
                ------------------------
     amount of the Working Capital Lenders' Working Capital Commitments at such
     time.

               "Working Capital Lender" means any Lender that has a Working
                ----------------------
     Capital Commitment.

               "Working Capital Note" means a promissory note of the Borrower
                --------------------
     payable to the order of any Working Capital Lender, in substantially the
     form of Exhibit A-3 hereto, evidencing the aggregate indebtedness of the
     Borrower to such Lender resulting from the Working Capital Advances made by
     such Lender, to the extent required to be issued pursuant to Section 2.17.

               "Year 2000 Compliant" means the (a) ability of the computer
                -------------------
     systems, software, equipment containing embedded microchips (including
     systems and equipment supplied by others) and other processing capabilities
     of the Parent Guarantor and its Subsidiaries correctly to interpret and
     manipulate all data, in whatever form, including printed form, screen
     displays, financial records, calculations and loan-related data, so as to
     avoid errors in processing that may otherwise occur because of the
     inability of such computer systems, software, equipment or other processing
     capabilities to recognize accurately the year 2000 or subsequent dates, (b)
     the completion of the testing of such ability of such computer systems,
     software, equipment and other processing capabilities and (c) the absence
     of any reasonably foreseeable consequences (including reprogramming errors)
     of the occurrence of the year 2000 to the Parent Guarantor and its
     Subsidiaries resulting from the inability of such computer systems,
     software, equipment and other processing capabilities to recognize
     accurately the year 2000 or subsequent dates that would result in a
     Material Adverse Effect.
<PAGE>

                                                                              34

          SECTION 1.02.  Computation of Time Periods; Other Definitional
                         -----------------------------------------------
Provisions.  In this Agreement and the other Loan Documents, in the computation
----------
of periods of time from a specified date to a later specified date, the word
"from" means "from and including" and the words "to" and "until" each mean "to
but excluding".  References in the Loan Documents to any agreement or contract
"as amended" shall mean and be a reference to such agreement or contract as
amended, amended and restated, supplemented or otherwise modified from time to
time in accordance with its terms.

          SECTION 1.03.  Accounting Terms.  All accounting terms not
                         ----------------
specifically defined herein shall be construed in accordance with generally
accepted accounting principles  in the United States ("GAAP") as in effect from
                                                       ----
time to time; provided, however, that for purposes of determining any financial
              --------  -------
ratio contained herein, including in the definition of the term "Applicable
Margin" and in Sections 2.16, 5.02(f) and 5.04, all accounting terms herein
shall be interpreted and all accounting determinations hereunder shall be made
in accordance with GAAP as in effect on the date hereof and applied on a basis
consistent with the application used in the financial statements referred to in
Section 5.03.

                                  ARTICLE II

                       AMOUNTS AND TERMS OF THE ADVANCES
                           AND THE LETTERS OF CREDIT

          SECTION 2.01.  The Advances and the Letters of Credit.  (a)  The Term
                         --------------------------------------        --------
A Advances.  Each Term A Lender severally agrees, on the terms and conditions
----------
hereinafter set forth, to make a single advance (a "Term A Advance") to the
                                                    --------------
Borrower on the date of the Initial Extension of Credit in an amount not to
exceed such Lender's Term A Commitment at such time.  The Term A Borrowing shall
consist of Term A Advances made simultaneously by the Term A Lenders ratably
according to their Term A Commitments.  Amounts borrowed under this Section
2.01(a) and repaid or prepaid may not be reborrowed.

          (b)  The Term B Advances.  Each Term B Lender severally agrees, on the
               -------------------
terms and conditions hereinafter set forth, to make a single advance (a "Term B
                                                                         ------
Advance") to the Borrower on the date of the Initial Extension of Credit in an
-------
amount not to exceed such Lender's Term B Commitment at such time.  The Term B
Borrowing shall consist of Term B Advances made simultaneously by the Term B
Lenders ratably according to their Term B Commitments.  Amounts borrowed under
this Section 2.01(b) and repaid or prepaid may not be reborrowed.

          (c)  The Working Capital Advances.  Each Working Capital Lender
               ----------------------------
severally agrees, on the terms and conditions hereinafter set forth, to make
advances (each, a "Working Capital Advance") to the Borrower from time to time
                   -----------------------
on any Business Day during the period
<PAGE>

                                                                              35

from the date of the Initial Extension of Credit until the Termination Date in
an amount for each such Advance not to exceed such Lender's Unused Working
Capital Commitment at such time. Each Working Capital Borrowing shall be in an
aggregate amount of $500,000 or an integral multiple of $100,000 in excess
thereof (other than a Borrowing the proceeds of which shall be used solely to
repay or prepay in full outstanding Letter of Credit Advances made by the
Issuing Bank) and shall consist of Working Capital Advances made simultaneously
by the Working Capital Lenders ratably according to their Working Capital
Commitments. Within the limits of each Working Capital Lender's Unused Working
Capital Commitment in effect from time to time, the Borrower may borrow under
this Section 2.01(c), prepay pursuant to Section 2.07(a) and reborrow under this
Section 2.01(c).

          (d) The Canadian Borrower Advances; Drawings.  Each Canadian Lender
              ----------------------------------------
severally agrees, on the terms and conditions hereinafter set forth, either (A)
to make a single advance (a "Canadian Borrower Advance") in Canadian Dollars to
                             -------------------------
the Canadian Borrower on the date of the Initial Extension of Credit in an
amount not to exceed such Lender's Unused Canadian Commitment at such time, or
(B) to accept a single Draft (such Draft so accepted, a "Bankers' Acceptance")
                                                         -------------------
for the account of the Canadian Borrower, and to purchase such Bankers'
Acceptance on the date of the Initial Extension of Credit, having a Face Amount
not to exceed such Lender's Unused Canadian Commitment at such time.  The
Canadian Borrowing, if any, shall consist of Canadian Borrower Advances made
simultaneously by the Canadian Lenders ratably according to their Canadian
Commitments.  Each Drawing, if any, shall be comprised solely of Canadian
Dollars, and shall consist of the creation and purchase of Bankers' Acceptances
at or about the same time by the Canadian Lenders ratably in accordance with
their respective Canadian Commitments.  Amounts borrowed under this Section
2.01(d) and repaid or prepaid may not be reborrowed.

          (e) The Acquisition Advances.  Subject to Section 2.16(c), each
              ------------------------
Acquisition Lender severally agrees, on the terms and conditions hereinafter set
forth, to make advances (each, an "Acquisition Advance") to the Borrower from
                                   -------------------
time to time on any Business Day during the period from the date of the Initial
Extension of Credit until the Conversion Date in an amount for each such Advance
not to exceed such Lender's Unused Acquisition Commitment at such time.  Each
Acquisition Borrowing shall be in an aggregate amount of $1,000,000 or an
integral multiple of $100,000 in excess thereof and shall consist of Acquisition
Advances made simultaneously by the Acquisition Lenders ratably according to
their Acquisition Commitments.  Amounts borrowed under this Section 2.01(e) and
repaid or prepaid may not be reborrowed.

          (f) The Swing Line Advances.  The Borrower may request the Swing Line
              -----------------------
Bank to make, and the Swing Line Bank agrees on the terms and conditions
hereinafter set forth, to make advances to the Borrower (each, a "Swing Line
                                                                  ----------
Advance") from time to time on any Business Day during the period from the date
-------
of the Initial Extension of Credit until the Termination Date (i) in an
aggregate amount not to exceed at any time outstanding $3,000,000 (the "Swing
                                                                        -----
Line Facility") and (ii) in an amount for each such Swing Line Borrowing not to
-------------
<PAGE>

                                                                              36

exceed the aggregate of the Unused Working Capital Commitments of the Working
Capital Lenders at such time.  No Swing Line Advance shall be used for the
purpose of funding the payment of principal of any other Swing Line Advance.
Each Swing Line Borrowing shall be in an amount of $100,000 or an integral
multiple of $50,000 in excess thereof and shall be made as a Base Rate Advance.
Within the limits of the Swing Line Facility and within the limits referred to
in clause (ii) above, the Borrower may borrow under this Section 2.01(f), repay
pursuant to Section 2.05(d) or prepay pursuant to Section 2.07(a) and reborrow
under this Section 2.01(f).

          (g) Letters of Credit.  The Issuing Bank severally agrees, on the
              -----------------
terms and conditions hereinafter set forth, to issue letters of credit for the
account of the Borrower from time to time on any Business Day during the period
from the date of the Initial Extension of Credit until 60 days before the
Termination Date (i) in an aggregate Available Amount for all Letters of Credit
issued by the Issuing Bank not to exceed at any time the Issuing Bank's Letter
of Credit Commitment at such time and (ii) in an Available Amount for each such
Letter of Credit not to exceed the lesser of (x) the Letter of Credit Facility
at such time and (y) the Unused Working Capital Commitments of the Working
Capital Lenders at such time.  No Letter of Credit shall have an expiration date
(including all rights of the Borrower or the beneficiary to require renewal)
later than the earlier of 60 days before the Termination Date and (A) in the
case of a Standby Letter of Credit, one year after the date of issuance thereof
and (B) in the case of a Trade Letter of Credit, 180 days after the date of
issuance thereof.  Within the limits of the Letter of Credit Facility, and
subject to the limits referred to above, the Borrower may request the issuance
of Letters of Credit under this Section 2.01(g), repay any Letter of Credit
Advances resulting from drawings thereunder pursuant to Section 2.05(e) and
request the issuance of additional Letters of Credit under this Section 2.01(g).

          SECTION 2.02.  Making the Advances.  (a)  Except as otherwise provided
                         -------------------
in Sections 2.02(b), 2.03 and 2.04, each Borrowing shall be made on notice,
given not later than (x) 11:00 A.M. (New York City time) on the third Business
Day prior to the date of the proposed Borrowing in the case of a Borrowing
consisting of Eurodollar Rate Advances under the Term A Facility, the Term B
Facility, the Working Capital Facility or the Acquisition Facility, (y) 11:00
A.M. (New York City time) on the first Business Day prior to the date of the
proposed Borrowing in the case of a Borrowing consisting of Base Rate Advances,
or (z) 11:00 A.M. (New York City time) on the first Canadian Business Day prior
to the date of the proposed Borrowing in the case of a Borrowing consisting of
Canadian Prime Rate Advances by the Applicable Borrower to the Agent, which
shall give to each Appropriate Lender prompt notice thereof by telecopier.  Each
such notice of a Borrowing (a "Notice of Borrowing") shall be in writing, by
                               -------------------
telecopier, in substantially the form of Exhibit B-1 hereto, specifying therein
the requested (i) date of such Borrowing, (ii) Facility under which such
Borrowing is to be made, (iii) Type of Advances comprising such Borrowing, (iv)
aggregate amount of such Borrowing and (v) in the case of a Borrowing consisting
of Eurodollar Rate Advances, initial Interest Period for each such Advance.
Each Appropriate Lender shall, before 11:00 A.M. (New York City time) on the
date of such Borrowing, make available for the account of its Applicable Lending
<PAGE>

                                                                              37

Office to the Agent at the applicable Agent's Account, in same day funds, such
Lender's ratable portion of such Borrowing in accordance with the respective
Commitments under the applicable Facility of such Lender and the other
Appropriate Lenders.  After the Agent's receipt of such funds and upon
fulfillment of the applicable conditions set forth in Article III, the Agent
will make such funds (in like funds as received by the Agent) available to the
Applicable Borrower by crediting the relevant Borrower's Account; provided,
                                                                  --------
however, that, in the case of any Working Capital Borrowing, the Agent shall
-------
first make a portion of such funds equal to the aggregate principal amount of
any Letter of Credit Advances made by any Issuing Bank and by any other Working
Capital Lender and outstanding on the date of such Working Capital Borrowing,
plus interest accrued and unpaid thereon to and as of such date, available to
such Issuing Bank and such other Working Capital Lenders for repayment of such
Letter of Credit Advances.

          (b) Each Swing Line Borrowing shall be made on notice, given not later
than 11:00 A.M. (New York City time) on the date of the proposed Swing Line
Borrowing, by the Borrower to the Swing Line Bank and the Agent.  Each such
notice, which shall be delivered by a Notice of Borrowing, shall be in writing,
by telecopier, in substantially the form of Exhibit B-1 hereto, specifying
therein the requested (i) date of such Borrowing (which shall be a Business
Day), (ii) amount of such Borrowing and (iii) maturity of such Borrowing (which
maturity shall be no later than the seventh day after the requested date of such
Borrowing).  The Swing Line Bank will make the amount thereof available to the
Agent at the Agent's Account, in same day funds.  After the Agent's receipt of
such funds and upon fulfillment of the applicable conditions set forth in
Article III, the Agent will make such funds available to the Borrower by
crediting the relevant Borrower's Account.  Upon written demand by the Swing
Line Bank with a copy of such demand to the Agent, each other Working Capital
Lender shall purchase from the Swing Line Bank, and the Swing Line Bank shall
sell and assign to each such other Working Capital Lender, such other Lender's
Pro Rata Share of such outstanding Swing Line Advance as of the date of such
demand, by making available for the account of its Applicable Lending Office to
the Agent for the account of the Swing Line Bank, by deposit to the Agent's
Account, in same day funds, an amount equal to the portion of the outstanding
principal amount of such Swing Line Advance to be purchased by such Lender.  The
Borrower hereby agrees to each such sale and assignment.  Each Working Capital
Lender agrees to purchase its Pro Rata Share of an outstanding Swing Line
Advance on (i) the Business Day on which demand therefor is made by the Swing
Line Bank, provided that notice of such demand is given not later than 11:00
           --------
A.M. (New York City time) on such Business Day or (ii) the first Business Day
next succeeding such demand if notice of such demand is given after such time.
Upon any such assignment by the Swing Line Bank to any other Working Capital
Lender of a portion of a Swing Line Advance, the Swing Line Bank represents and
warrants to such other Lender that the Swing Line Bank is the legal and
beneficial owner of such interest being assigned by it, but makes no other
representation or warranty and assumes no responsibility with respect to such
Swing Line Advance, the Loan Documents or any Loan Party.  If and to the extent
that any Working Capital Lender shall not have so made the amount of such Swing
Line Advance available to the Agent, such Working Capital Lender
<PAGE>

                                                                              38

agrees to pay to the Agent forthwith on demand such amount together with
interest thereon, for each day from the date of demand by the Swing Line Bank
until the date such amount is paid to the Agent, at the Federal Funds Rate. If
such Lender shall pay to the Agent such amount for the account of the Swing Line
Bank on any Business Day, such amount so paid in respect of principal shall
constitute a Swing Line Advance made by such Lender on such Business Day for
purposes of this Agreement, and the outstanding principal amount of the Swing
Line Advance made by the Swing Line Bank shall be reduced by such amount on such
Business Day.

          (c) Anything in subsection (a) above to the contrary notwithstanding,
(i) neither the Borrower, nor the Canadian Borrower, may select any Eurodollar
Rate Advances for the initial Borrowing hereunder and for the period from the
date of such initial Borrowing to the earlier of (x) a date agreed upon by the
Agent and such Borrower or such Canadian Borrower, as the case may be, (but, in
any event, not exceeding three months from the date of such initial Borrowing)
and (y) the completion of syndication of the Facilities (as shall be specified
by the Agent in a written notice to the Borrower and the Canadian Borrower) or
for any Borrowing if the aggregate amount of such Borrowing is less than
$1,000,000 (or the Equivalent thereof in Canadian Dollars) or if the obligation
of the Appropriate Lenders to make Eurodollar Rate Advances shall then be
suspended pursuant to Section 2.10 or 2.12 and (ii) with respect to Borrowings
consisting of Eurodollar Rate Advances, the Term A Advances, the Term B Advances
and the Working Capital Advances may not be outstanding as part of more than ten
separate Borrowings in the aggregate, the Acquisition Advances may not be
outstanding as part of more than three separate Borrowings and the Canadian
Borrower Advances may not be outstanding as part of more than two separate
Borrowings.

          (d) Each Notice of Borrowing shall be irrevocable and binding on the
Applicable Borrower giving such notice.  In the case of any Borrowing that the
related Notice of Borrowing specifies is to be comprised of Eurodollar Rate
Advances, the Applicable Borrower giving such notice shall indemnify each
Appropriate Lender against any loss, cost or expense incurred by such Lender as
a result of any failure to fulfill on or before the date specified in such
Notice of Borrowing for such Borrowing the applicable conditions set forth in
Article III, including, without limitation, any loss, cost or expense incurred
by reason of the liquidation or reemployment of deposits or other funds acquired
by such Lender to fund the Advance to be made by such Lender as part of such
Borrowing when such Advance, as a result of such failure, is not made on such
date (but, in any event, excluding any loss of profits and the Applicable Margin
applicable to such Advances).

          (e) Unless the Agent shall have received notice from an Appropriate
Lender prior to the date of any Borrowing under a Facility under which such
Lender has a Commitment that such Lender will not make available to the Agent
such Lender's ratable portion of such Borrowing, the Agent may assume that such
Lender has made such portion available to the Agent on the date of such
Borrowing in accordance with subsection (a) or (b) of this Section 2.02 and the
Agent may, in reliance upon such assumption, make available to the Applicable
<PAGE>

                                                                              39

Borrower on such date a corresponding amount.  If and to the extent that such
Lender shall not have so made such ratable portion available to the Agent, such
Lender and the Applicable Borrower severally agree to repay or pay to the Agent
forthwith on demand such corresponding amount and to pay interest thereon, for
each day from the date such amount is made available to such Applicable Borrower
until the date such amount is repaid or paid to the Agent, at (i) in the case of
the Borrower or the Canadian Borrower, the interest rate applicable at such time
under Section 2.08 to Advances comprising such Borrowing and (ii) in the case of
such Lender, the higher of (A) the Federal Funds Rate and (B) the cost of funds
incurred by the Agent in respect of such amount.  If such Lender shall pay to
the Agent such corresponding amount, such amount so paid in respect of principal
shall constitute such Lender's Advance as part of such Borrowing for all
purposes.

          (f) The failure of any Lender to make the Advance to be made by it as
part of any Borrowing shall not relieve any other Lender of its obligation, if
any, hereunder to make its Advance on the date of such Borrowing, but no Lender
shall be responsible for the failure of any other Lender to make the Advance to
be made by such other Lender on the date of any Borrowing.

          SECTION 2.03.  Issuance of and Drawings and Reimbursement Under
                         ------------------------------------------------
Letters of Credit.  (a)  Request for Issuance.  Each Letter of Credit shall be
-----------------        --------------------
issued upon notice, given not later than 11:00 A.M. (New York City time) on the
fifth Business Day prior to the date of the proposed issuance of such Letter of
Credit, by the Borrower to the Issuing Bank, which shall give to the Agent
prompt notice thereof by telecopier.  Each such notice of issuance of a Letter
of Credit (a "Notice of Issuance") shall be in writing, by telecopier,
              ------------------
specifying therein the requested (A) date of such issuance (which shall be a
Business Day), (B) Available Amount of such Letter of Credit, (C) expiration
date of such Letter of Credit, (D) name and address of the beneficiary of such
Letter of Credit and (E) form of such Letter of Credit, and shall be accompanied
by such application and agreement for letter of credit as the Issuing Bank may
specify to the Borrower for use in connection with such requested Letter of
Credit (a "Letter of Credit Agreement").  If the requested form of such Letter
           --------------------------
of Credit is acceptable to the Issuing Bank in its sole discretion, the Issuing
Bank will, upon fulfillment of the applicable conditions set forth in Article
III, make such Letter of Credit available to the Borrower at its office referred
to in Section 8.02 or as otherwise agreed with the Borrower in connection with
such issuance.  In the event and to the extent that the provisions of any Letter
of Credit Agreement shall conflict with this Agreement, the provisions of this
Agreement shall govern.

          (b) Letter of Credit Reports.  The Issuing Bank shall furnish (A) to
              ------------------------
the Agent on the first Business Day of each week a written report summarizing
issuance and expiration dates of Letters of Credit issued during the previous
week and drawings during such week under all Letters of Credit, (B) to each
Working Capital Lender on the first Business Day of the first two months of each
quarterly period a written report summarizing issuance and expiration dates of
Letters of Credit during the preceding month and drawings during such month
under all
<PAGE>

                                                                              40

Letters of Credit and (C) to the Agent and each Working Capital Lender on the
first Business Day of each calendar quarter a written report setting forth the
average daily aggregate Available Amount during the preceding calendar quarter
of all Letters of Credit.

          (c) Drawing and Reimbursement.  The payment by the Issuing Bank of a
              -------------------------
draft drawn under any Letter of Credit shall constitute for all purposes of this
Agreement the making by the Issuing Bank of a Letter of Credit Advance, which
shall be a Base Rate Advance, in the amount of such draft.  In the event of any
drawing under a Letter of Credit, the Issuing Bank shall promptly notify the
Agent, and the Agent shall promptly notify each Working Capital Lender and each
Working Capital Lender shall purchase from the Issuing Bank, and the Issuing
Bank shall sell and assign to each such Working Capital Lender, such Lender's
Pro Rata Share of such outstanding Letter of Credit Advance as of the date of
such purchase, by making available for the account of its Applicable Lending
Office to the Agent for the account of the Issuing Bank, by deposit to the
applicable Agent's Account, in same day funds, an amount equal to the portion of
the outstanding principal amount of such Letter of Credit Advance to be
purchased by such Lender.  Promptly after receipt thereof, the Agent shall
transfer such funds to the Issuing Bank.  The Borrower hereby agrees to each
such sale and assignment.  Each Working Capital Lender agrees to purchase its
Pro Rata Share of an outstanding Letter of Credit Advance on (i) the Business
Day on which notice of the drawing under the related Letter of Credit is given
by the Issuing Bank, provided such notice is given not later than 1:00 P.M. (New
                     --------
York City time) on such Business Day or (ii) the first Business Day next
succeeding such demand if such notice is given after such time.  Upon any such
assignment by the Issuing Bank to any other Working Capital Lender of a portion
of a Letter of Credit Advance, the Issuing Bank represents and warrants to such
other Lender that the Issuing Bank is the legal and beneficial owner of such
interest being assigned by it, free and clear of any liens, but makes no other
representation or warranty and assumes no responsibility with respect to such
Letter of Credit Advance, the Loan Documents or any Loan Party.  If and to the
extent that any Working Capital Lender shall not have so made the amount of such
Letter of Credit Advance available to the Agent, such Working Capital Lender
agrees to pay to the Agent forthwith on demand such amount together with
interest thereon, for each day from the date of demand by the Issuing Bank until
the date such amount is paid to the Agent, at the Federal Funds Rate for its
account or the account of the Issuing Bank, as applicable.  If such Lender shall
pay to the Agent such amount for the account of the Issuing Bank on any Business
Day, such amount so paid in respect of principal shall constitute a Letter of
Credit Advance made by such Lender on such Business Day for purposes of this
Agreement, and the outstanding principal amount of the Letter of Credit Advance
made by the Issuing Bank shall be reduced by such amount on such Business Day.

          (d) Failure to Make Letter of Credit Advances.  The failure of any
              -----------------------------------------
Lender to make the Letter of Credit Advance to be made by it on the date
specified in Section 2.03(c) shall not relieve any other Lender of its
obligation hereunder to make its Letter of Credit Advance on such date, but no
Lender shall be responsible for the failure of any other Lender to make the
Letter of Credit Advance to be made by such other Lender on such date.
<PAGE>

                                                                              41

          SECTION 2.04.  Drawings of Bankers' Acceptances.  (a)  Request for
                         --------------------------------        -----------
Drawing.  Each Drawing shall be made on notice, given not later than 12:00 noon
-------
(New York City time) on a Canadian Business Day at least two Canadian Business
Days prior to the date of the proposed Drawing, by the Canadian Borrower to the
Agent, which shall give each Canadian Lender prompt notice thereof by
telecopier.  Each notice of a Drawing (a "Notice of Drawing") shall be in
                                          -----------------
writing (including by telecopier), in substantially the form of Exhibit B-2
hereto, specifying therein the requested (i) date of such Drawing (which shall
be a Canadian Business Day), (ii) aggregate Face Amount of such Drawing and
(iii) initial Maturity Date for each Bankers' Acceptance comprising part of such
Drawing; provided, however, that, if the Agent determines in good faith (which
         --------  -------
determination shall be conclusive and binding upon the Canadian Borrower) that
the Drafts to be accepted and purchased as part of any Drawing cannot, due
solely to the requested aggregate Face Amount thereof, be accepted and/or
purchased ratably by the Canadian Lenders in accordance with Section 2.01(d),
then the aggregate Face Amount of such Drawing (or the Face Amount of Bankers'
Acceptances to be created and purchased by any Canadian Lender) shall be reduced
to such lesser amount as the Agent determines will permit such Drafts comprising
part of such Drawing to be so accepted and purchased and, unless the Canadian
Borrower shall have given written notice to the contrary to the Agent, each
Canadian Lender shall fund the difference between such Lender's ratable portion
of the original aggregate Face Amount of such Drawing and the Face Amount of the
Bankers' Acceptances to be created by such Lender after giving effect to such
reduction in the form of a Canadian Prime Rate Advance, which shall be deemed
for all purposes hereof to be a Canadian Borrower Advance made pursuant to
Section 2.01(d).  The Agent agrees that it will, as promptly as practicable,
notify the Canadian Borrower of the unavailability of Bankers' Acceptances and,
if applicable, of the date and the amount of each Canadian Prime Rate Advance to
be made or actually made in accordance with the immediately preceding sentence.
Each Draft in connection with any requested Drawing (A) shall be in a minimum
amount of CN$100,000 or an integral multiple of CN$100,000 in excess thereof,
and (B) shall be dated the date of the proposed Drawing.  Each Canadian Lender
shall, before 1:00 P.M. (Toronto time) on the date of each Drawing, complete one
or more Drafts in accordance with the related Notice of Drawing, accept such
Drafts and purchase the Bankers' Acceptances created thereby for the Drawing
Purchase Price and shall, before 1:00 P.M. (Toronto time) on such date, make
available for the account of its Applicable Lending Office to the Agent at its
appropriate Agent's Account, in same day funds, the Drawing Purchase Price
payable by such Lender for such Drawing less the Stamping Fee payable to such
Lender with respect thereto under Section 2.09(d).  Upon the fulfillment of the
applicable conditions set forth in Article III, the Agent will make the funds it
has received from the Canadian Lenders available to the Canadian Borrower by
crediting the relevant Borrower's Account.

          (b)  Limitations on Drawings.  Anything in Section 2.04(a) to the
               -----------------------
contrary notwithstanding, the Canadian Borrower may not select a Drawing if the
obligation of the
<PAGE>

                                                                              42

Canadian Lenders to purchase and accept Bankers' Acceptances shall then be
suspended pursuant to Section 2.04(d) or 2.12.

          (c)  Binding Effect of Notices of Drawing.  Each Notice of Drawing
               ------------------------------------
shall be irrevocable and binding on the Canadian Borrower.  In the case of any
proposed Drawing, the Canadian Borrower shall indemnify each Canadian Lender
against any loss, cost or expense incurred by such Lender as a result of any
failure to fulfill on or before the date specified in the Notice of Drawing for
such Drawing the applicable conditions set forth in Article III, including,
without limitation, any loss, cost or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by such Lender
to fund the Drawing Purchase Price to be paid by such Lender as part of such
Drawing when, as a result of such failure, such Drawing is not made on such date
(but, in any event, excluding any loss of profit and the Stamping Fee applicable
to such Drawing).

          (d)  Circumstances Making Bankers' Acceptances Unavailable.  (i)  If,
               -----------------------------------------------------
with respect to any proposed Drawing, the Agent determines in good faith that
circumstances affecting the money markets at the time any related Notice of
Drawing is delivered or is outstanding will result in no market for the Bankers'
Acceptances to be created in connection with such Drawing or an insufficient
demand for such Bankers' Acceptances to allow the Lenders creating such Bankers'
Acceptances to sell or trade the Bankers' Acceptances to be created and
purchased or discounted by them hereunder in connection with such Drawing, then,
upon notice to the Canadian Borrower and the Canadian Lenders thereof, (A) the
Notice of Drawing with respect to such proposed Drawing shall be canceled and
the Drawing requested therein shall not be made and (B) the right of the
Canadian Borrower to request a Drawing shall be suspended until the Agent shall
notify such Borrower that the circumstances causing such suspension no longer
exist.  In the case of any such cancelation of a Notice of Drawing, unless the
Canadian Borrower shall give written notice to the contrary to the Agent, the
cancelation of any such Notice of Drawing shall be deemed to be the giving by
the Canadian Borrower of a Notice of Borrowing for Canadian Borrower Advances
consisting of Canadian Prime Rate Advances in an aggregate principal amount
equal to the aggregate Face Amount of such proposed Drawing and the Canadian
Lenders shall, subject to the terms and conditions hereof applicable to the
making of Canadian Borrower Advances, make such Advances available to the
Canadian Borrower, if practicable, on the same Business Day as the date of the
requested Drawing, and otherwise on the next Business Day.  The Agent agrees
that it will, as promptly as practicable, notify the Canadian Borrower of the
unavailability of Bankers' Acceptances and, if applicable, of the date and the
amount of each Canadian Prime Rate Advance to be made or actually made in
accordance with the immediately preceding sentence.

          (ii) Upon the occurrence and during the continuance of any Default,
the obligation of the Canadian Lenders to create and purchase Bankers'
Acceptances shall be suspended.
<PAGE>

                                                                              43

          (e)  Assumptions of the Agent.  Unless the Agent shall have received
               ------------------------
notice from a Canadian Lender prior to the date of any Drawing that such Lender
will not make available to it such Lender's ratable share of the proceeds of
such Drawing in accordance with Section 2.04(a), the Agent may assume that such
Lender has made such ratable share available to it on the date of such Drawing
in accordance with Section 2.04(a) and the Agent may, in reliance upon such
assumption, make available to the Canadian Borrower on such date a corresponding
amount.  If and to the extent that any such Lender shall not have so made such
ratable share available to the Agent, such Lender and the Canadian Borrower
severally agree to repay or pay to the Agent forthwith on demand such
corresponding amount, together with interest thereon, for each day from the date
such amount is made available to the Canadian Borrower until the date such
amount is repaid or paid to the Agent, at (i) in the case of the Canadian
Borrower, a rate per annum equal to the BA Rate used in calculating the Drawing
Purchase Price with respect to such Drawing, and (ii) in the case of such
Lender, the Canadian Interbank Rate.  If such Lender shall pay to the Agent such
corresponding amount, such amount so paid shall constitute such Lender's ratable
share of the proceeds of such Drawing for all purposes under this Agreement.

          (f)  Presigned Draft Forms.  To enable the Canadian Lenders to create
               ---------------------
Bankers' Acceptances in accordance with Section 2.01(d) and this Section 2.04,
the Canadian Borrower shall supply each Canadian Lender, upon the Canadian
Borrower's execution of this Agreement and from time to time thereafter, with
such number of Drafts provided to the Canadian Borrower by the Agent as the
Agent may from time to time reasonably request, duly endorsed and executed on
behalf of the Canadian Borrower by any one or more of its duly authorized
officers.  Each Canadian Lender shall exercise such care in the custody and
safekeeping of any Drafts in its possession from time to time as it would
exercise in the custody and safekeeping of similar property owned by it.  The
signatures of officers of the Canadian Borrower on Drafts may be mechanically
reproduced in facsimile and Bankers' Acceptances bearing such facsimile
signatures shall be binding upon the Canadian Borrower as if they had been
manually signed by such officers.  Notwithstanding that any of the individuals
whose manual or facsimile signature appears on any Draft as one of such officers
may no longer hold office at the date of such draft or at the date of its
acceptance by a Lender hereunder or at any time thereafter, any Draft or
Bankers' Acceptance so signed shall be valid and binding upon, and enforceable
against, the Canadian Borrower.  The Canadian Borrower hereby appoints each
Canadian Lender holding a Draft with respect to a Drawing made under this
Agreement, as its attorney-in-fact to, from time to time, complete such Draft to
adequately reflect such Drawing made by such Canadian Lender.

          (g)  Distribution of Bankers' Acceptances.  Bankers' Acceptances
               ------------------------------------
purchased by a Canadian Lender in accordance with the terms of Section 2.01(d)
and this Section 2.04 may, in such Lender's sole discretion, be held by such
Lender for its own account until the applicable Maturity Date or sold,
rediscounted or otherwise disposed of by it at any time prior thereto in any
relevant market therefor.
<PAGE>

                                                                              44

          (h)  Failure to Fund in Respect of Drawings.  The failure of any
               --------------------------------------
Canadian Lender to fund the Drawing Purchase Price to be funded by it as part of
any Drawing shall not relieve any other Canadian Lender of its obligation
hereunder to fund its Drawing Purchase Price on the date of such Drawing, but no
Canadian Lender shall be responsible for the failure of any other Canadian
Lender to fund the Drawing Purchase Price to be funded by such other Canadian
Lender on the date of any Drawing.

          SECTION 2.05.  Repayment of Advances.  (a)  Term Advances, Canadian
                         ---------------------        -----------------------
Borrower Advances and Drawings under the Canadian Facility.  The Borrower shall
----------------------------------------------------------
repay to the Agent for the ratable account of the Term A Lenders and Term B
Lenders the aggregate outstanding principal amount of the Term A Advances and
Term B Advances, respectively, and the Canadian Borrower shall repay to the
Agent for the ratable account of the Canadian Lenders the aggregate outstanding
principal amount of the Canadian Borrower Advances and the aggregate Face Amount
of the Banker's Acceptances, as applicable, on the following dates in the
amounts indicated (which amounts shall be reduced as a result of the application
of prepayments in accordance with the order of priority set forth in Section
2.07):

<TABLE>
<CAPTION>
            Date                     Amount
----------------               ------------------
                                Term A Facility       Term B Facility        Canadian Facility
                               ------------------  ---------------------  -----------------------
<S>                            <C>                 <C>                    <C>
December 31, 1999                               -            $   250,000                  -

March 31, 2000                                  -                250,000        CN $146,000
June 30, 2000                          $1,195,400                250,000        CN $146,000
September 30, 2000                      1,195,400                250,000        CN $146,000
December 31, 2000                       1,552,300                500,000        CN $146,000

March 31, 2001                          1,552,300                500,000        CN $146,000
June 30, 2001                           1,552,300                500,000        CN $146,000
September 30, 2001                      1,552,300                500,000        CN $146,000
December 31, 2001                       2,150,000                500,000        CN $146,000

March 31, 2002                          2,150,000                500,000        CN $117,120
June 30, 2002                           2,150,000                500,000        CN $117,120
September 30, 2002                      2,150,000                500,000        CN $117,120
December 31, 2002                       2,150,000                500,000        CN $117,120

March 31, 2003                          2,150,000                500,000        CN $117,120
June 30, 2003                           2,150,000                500,000        CN $117,120
September 30, 2003                      2,150,000                500,000        CN $117,120
December 31, 2003                       2,150,000                500,000        CN $117,120
</TABLE>
<PAGE>

                                                                              45

<TABLE>
<CAPTION>
                                     Amount
                               ------------------
            Date                Term A Facility       Term B Facility        Canadian Facility
----------------               ------------------  ---------------------  -----------------------
<S>                            <C>                 <C>                    <C>
March 31, 2004                          2,150,000                500,000        CN $117,120
June 30, 2004                           2,150,000                500,000        CN $117,120
September 30, 2004                      2,150,000                500,000        CN $117,120
December 31, 2004                       2,150,000                500,000        CN $117,120

March 31, 2005                          2,150,000                500,000        CN $117,120
June 30, 2005                           2,150,000                500,000        CN $117,120
September 30, 2005                      2,150,000                500,000        CN $117,120
December 31, 2005                               -              9,000,000                  -

March 31, 2006                                  -              9,000,000                  -
June 30, 2006                                   -              9,000,000                  -
September 30, 2006                              -              9,000,000                  -
December 31, 2006                               -             12,000,000                  -

March 31, 2007                                  -             12,000,000                  -
June 30, 2007                                   -             12,000,000                  -
September 30, 2007                              -             12,000,000                  -
</TABLE>

provided, however, that the final principal installment of the Term A Facility,
--------  -------
the Term B Facility and the Canadian Facility, respectively, shall in any event
and in each case be in an amount equal to the aggregate principal amount of the
Term A Advances, the Term B Advances, the Canadian Borrower Advances and the
Bankers' Acceptances, respectively, then outstanding. Any payment by the
Canadian Borrower of any Bankers' Acceptances in accordance with this Section
2.05(a) shall, to the extent of such payment, satisfy the obligations of the
Canadian Borrower under the Bankers' Acceptances to which it relates and, in the
case of a Bankers' Acceptance, the Canadian Lender that has accepted such
Bankers' Acceptance shall, to the extent of such payment to such Canadian
Lender, thereafter be solely responsible for the payment thereof.

          (b) Working Capital Advances.  The Borrower shall repay to the Agent
              ------------------------
for the ratable account of the Working Capital Lenders on the Termination Date
the aggregate outstanding principal amount of the Working Capital Advances then
outstanding.

          (c) Acquisition Advances.  The Borrower shall repay to the Agent for
              --------------------
the ratable account of the Acquisition Lenders (x) on each March 31, June 30,
September 30 and December 31, commencing December 31, 2002, an amount equal to
1/12 of the aggregate principal balance of Acquisition Advances outstanding on
the Conversion Date (after giving effect to any prepayments on the Conversion
Date required by Section 2.07(b)(i) or (ii) and
<PAGE>

                                                                              46

which amount shall be reduced as a result of the application of further
prepayments in accordance with the order of priority set forth in the applicable
paragraph of Section 2.07) or (y) on September 30, 2005 an amount equal to the
aggregate principal amount of the Acquisition Advances then outstanding.

          (d)  Swing Line Advances.  The Borrower shall repay to the Agent, for
               -------------------
the account of the Swing Line Bank and each other Working Capital Lender which
has made a Swing Line Advance, the outstanding principal amount of each Swing
Line Advance made by each of them on the earlier of the maturity date specified
in the applicable Notice of Borrowing (which maturity shall be no later than the
seventh day after the requested date of such Borrowing) and the Termination
Date.

          (e)  Letter of Credit Advances.  (i)  The Borrower shall repay to the
               -------------------------
Agent for the account of the Issuing Bank and each other Working Capital Lender
that has made a Letter of Credit Advance on the earlier of the Termination Date
and on demand the outstanding principal amount of each Letter of Credit Advance
made by each of them.

          (ii) The Obligations of the Borrower under this Agreement, any Letter
of Credit Agreement and any other agreement or instrument relating to any Letter
of Credit shall be unconditional and irrevocable, and shall be paid strictly in
accordance with the terms of this Agreement, such Letter of Credit Agreement and
such other agreement or instrument under all circumstances, including, without
limitation, the following circumstances:

          (A)  any lack of validity or enforceability of any Loan Document,
     any Letter of Credit Agreement, any Letter of Credit or any other agreement
     or instrument relating thereto (all of the foregoing being, collectively,
     the "L/C Related Documents");
          ---------------------

          (B)  any change in the time, manner or place of payment of, or in any
     other term of, all or any of the Obligations of the Borrower in respect of
     any L/C Related Document or any other amendment or waiver of or any consent
     to departure from all or any of the L/C Related Documents;

          (C)  the existence of any claim, set-off, defense or other right that
     the Borrower may have at any time against any beneficiary or any transferee
     of a Letter of Credit (or any Persons for whom any such beneficiary or any
     such transferee may be acting), the Issuing Bank or any other Person,
     whether in connection with the transactions contemplated by the L/C Related
     Documents or any unrelated transaction;

          (D)  any statement or any other document presented under a Letter of
     Credit proving to be forged, fraudulent, invalid or insufficient in any
     respect or any statement therein being untrue or inaccurate in any respect;
<PAGE>

                                                                              47

          (E)  payment by the Issuing Bank under a Letter of Credit against
     presentation of a draft or certificate that does not strictly comply with
     the terms of such Letter of Credit;

          (F)  any exchange, release or non-perfection of any Collateral or
     other collateral, or any release or amendment or waiver of or consent to
     departure from any guarantee, for all or any of the Obligations of the
     Borrower in respect of the L/C Related Documents; or

          (G)  any other circumstance or happening whatsoever, whether or not
     similar to any of the foregoing, including, without limitation, any other
     circumstance that might otherwise constitute a defense available to, or a
     discharge of, the Borrower or a guarantor.

          SECTION 2.06.  Termination or Reduction of the Commitments.  (a)
                         -------------------------------------------
Optional.  (i)  The Borrower may, upon at least five Business Days' notice to
--------
the Agent, terminate in whole or reduce in part the unused portions of the Term
A Commitments and the Term B Commitments, the Unused Acquisition Commitments and
the Unused Working Capital Commitments; provided, however, that each partial
                                        --------  -------
reduction of a Facility (i) shall be in an aggregate amount of $1,000,000 or an
integral multiple of $100,000 in excess thereof and (ii) shall be made ratably
among the Appropriate Lenders in accordance with their Commitments with respect
to such Facility.

          (ii) The Canadian Borrower may, upon at least five Canadian Business
Days' notice to the Agent, terminate in whole or reduce in part the Unused
Canadian Commitments; provided, however, that each partial reduction of the
                      --------  -------
Canadian Facility (i) shall be in an aggregate amount of CN$500,000 or an
integral multiple of CN$100,000 in excess thereof and (ii) shall be made ratably
among the Canadian Lenders in accordance with their Canadian Commitments.

          (b)  Mandatory.  (i)  On the date of the Term A Borrowing, after
               ---------
giving effect to such Term A Borrowing, and from time to time thereafter upon
each repayment or prepayment of the Term A Advances, the aggregate Term A
Commitments of the Term A Lenders shall be automatically and permanently
reduced, on a pro rata basis, by an amount equal to the amount by which the
aggregate Term A Commitments immediately prior to such reduction exceed the
aggregate unpaid principal amount of the Term A Advances then outstanding.

          (ii) On the date of the Term B Borrowing, after giving effect to such
Term B Borrowing, and from time to time thereafter upon each repayment or
prepayment of the Term B Advances, the aggregate Term B Commitments of the Term
B Lenders shall be automatically and permanently reduced, on a pro rata basis,
by an amount equal to the amount by which the aggregate Term B Commitments
immediately prior to such reduction exceed the aggregate unpaid principal amount
of the Term B Advances then outstanding.
<PAGE>

                                                                              48

          (iii) On the date of the Canadian Borrowing, after giving effect to
such Canadian Borrowing, and from time to time thereafter upon each repayment or
prepayment of the Canadian Borrower Advances and upon each repayment or
prepayment of any outstanding Bankers' Acceptances, the aggregate Canadian
Commitments shall be automatically and permanently reduced, on a pro rata basis,
by an amount equal to the amount by which the aggregate Canadian Commitments
immediately prior to such reduction exceed the sum of the aggregate principal
amount of the Canadian Borrower Advances outstanding at such time, and the
aggregate Face Amount of all Bankers' Acceptances created and purchased and
outstanding at such time.

          (iv)  The Working Capital Facility shall be automatically and
permanently reduced on the date on which any prepayment thereof is required to
be made pursuant to Section 2.07(b)(i) or (ii) by an amount equal to the
applicable Reduction Amount, provided that each such reduction of the Working
                             --------
Capital Facility shall be made ratably among the Working Capital Lenders in
accordance with their Working Capital Commitments.

          (v)   The Acquisition Facility shall be automatically and permanently
reduced on the date on which any prepayment thereof is required to be made
pursuant to Section 2.07(b)(i) or (ii) by an amount equal to the Acquisition
Reduction Amount, provided that each such reduction of the Acquisition Facility
                  --------
shall be made ratably among the Acquisition Lenders in accordance with their
Acquisition Commitments.  In addition, from and after the Conversion Date, upon
each repayment or prepayment of the Acquisition Advances, the Acquisition
Commitments of the Acquisition Lenders shall be automatically and permanently
reduced, on a pro rata basis, by an aggregate amount equal to the amount by
which the aggregate Acquisition Commitments immediately prior to such reduction
exceed the aggregate unpaid principal amount of the Acquisition Advances then
outstanding.

          (vi)  The Swing Line Facility and the Letter of Credit Facility shall
each be automatically and permanently reduced from time to time on the date of
each reduction in the  Working Capital Facility by the amount, if any, by which
each such Facility exceeds the Working Capital Facility after giving effect to
such reduction of the Working Capital Facility.

          SECTION 2.07.  Prepayments.  (a)  Optional.  Each Applicable Borrower
                         -----------        --------
may, upon at least one Business Day's notice in the case of Base Rate Advances
or Canadian Prime Rate Advances and three Business Days' notice in the case of
Eurodollar Rate Advances, in each case to the Agent (received not later than
11:00 A.M. (New York City time)) stating the proposed date, whether the
prepayment will be of Working Capital Advances or of Term Advances and
Acquisition Advances and the aggregate principal amount of the prepayment, and
if such notice is given the Applicable Borrower shall, prepay (i) Working
Capital Advances or (ii) Term Advances and Acquisition Advances, as set forth in
the notice described above, comprising part of the same Borrowings, in whole or
ratably in part, in an aggregate principal amount equal to
<PAGE>

                                                                              49

the amount set forth in the notice described above, together with accrued
interest to the date of such prepayment on the aggregate principal amount
prepaid unless such prepayment is with respect to a Swing Line Advance or a
Working Capital Advance which is a Base Rate Advance; provided, however, that
                                                      --------  -------
(x) each partial prepayment (other than a prepayment of Swing Line Advances)
shall be in an aggregate principal amount of $500,000 (or its Equivalent in
Canadian Dollars) or an integral multiple of $100,000 (or its Equivalent in
Canadian Dollars) in excess thereof (or, with respect to Swing Line Advances,
shall be in an aggregate principal amount of $100,000 or an integral multiple of
$50,000 in excess thereof) and (y) if any prepayment of a Eurodollar Rate
Advance is made on a date other than the last day of an Interest Period for such
Advance the Applicable Borrower shall also pay any amounts owing pursuant to
Section 8.04(c). Each such prepayment that is made with respect to the Term
Advances and the Acquisition Advances shall be allocated, subject to Section
2.07(c), among the Term A Facility, the Term B Facility and the Acquisition
Facility ratably (based on the then-outstanding aggregate principal amount of
the Advances under each such Facility) and, within each such Facility, applied
(i) first, in order of maturity to the remaining principal installments thereof
due in the next twelve months and (ii) second, ratably to the remaining
principal installments thereof. Each such prepayment which is made with respect
to Canadian Borrower Advances shall be applied to the Canadian Facility, ratably
to the remaining principal installments thereof. The Canadian Borrower may not
prepay the amount of any Drawing pursuant to this Section 2.07(a), except on the
Maturity Date thereof.

          (b)  Mandatory.  (i)  The Borrower shall, no later than the 30th day
               ---------
following the date on which it delivers the financial statements referred to in
Section 5.03(d) for the Fiscal Year ending on or about December 31, 2000 and for
each Fiscal Year thereafter (but in any event within 120 days after the end of
each Fiscal Year), prepay an aggregate principal amount of Advances comprising
part of the same Borrowings equal to 75% of the amount of Excess Cash Flow of
the Borrower and its Subsidiaries for such Fiscal Year, provided that the amount
                                                        --------
of such prepayment shall be reduced to 50% of the amount of Excess Cash Flow of
the Borrower and its Subsidiaries for such Fiscal Year if the Leverage Ratio of
the Parent Guarantor and its Subsidiaries as of the end of such Fiscal Year is
equal to or less than 4.00 to 1.00.  Each such prepayment of Advances shall be
allocated as follows:

          first, subject to Section 2.07(c), among the Term A Facility, the Term
          -----
     B Facility and the Acquisition Facility ratably (based on the then-
     outstanding aggregate principal amount of the Advances under each such
     Facility) and, within each such Facility, applied ratably to the remaining
     principal installments thereof, and

          second, to the extent that no Term Advances remain outstanding and the
          ------
     Acquisition Facility has been fully repaid and permanently reduced in full,
     to the Working Capital Facility as set forth in clause (v) below.
<PAGE>

                                                                              50

          (ii) (x)  The Borrower shall, on the date of receipt of the Net Cash
Proceeds by the Parent Guarantor or any of its Domestic Subsidiaries from (A)
the sale, lease, transfer or other disposition of (1) any shares of capital
stock of a Subsidiary of the Borrower  (other than directors' qualifying shares
or shares required by applicable law to be held by a Person other than the
Borrower or a Subsidiary of the Borrower), (2) all or substantially all the
assets of any division or line of business of the Borrower or any Subsidiary of
the Borrower or (3) any other assets of the Borrower or any Subsidiary of the
Borrower outside of the ordinary course of business of the Borrower or such
Subsidiary of the Borrower (other than any sale, lease, transfer or other
disposition permitted pursuant to Section 5.02(e)(vi), Section 5.02(e)(xi) or
Section 5.02(e)(xii)), (B) the incurrence or issuance by the Parent Guarantor or
any of its Domestic Subsidiaries of any Debt (other than Debt incurred or issued
pursuant to Section 5.02(b)), (C) (1) the sale or issuance by the Parent
Guarantor or any of its Domestic Subsidiaries to any Person (other than the
Parent Guarantor or any of its Domestic Subsidiaries) of any capital stock or
other ownership or profit interest, any securities convertible into or
exchangeable for capital stock or other ownership or profit interest or any
warrants, rights or options to acquire capital stock or other ownership or
profit interest, in each case of the Parent Guarantor or any of its Domestic
Subsidiaries or (2) without duplication of clause (1) of this sub-clause (C),
the receipt by the Parent Guarantor or any of its Domestic Subsidiaries of any
capital contribution (other than from the Parent Guarantor or any of its
Domestic Subsidiaries), other than (aa) in each case any such issuance or sale
of such equity interests by or to, or receipt of any such capital contribution
by, the Parent Guarantor or any of its Domestic Subsidiaries for the sole
purpose of financing a Permitted Acquisition (including any issuance to one or
more sellers in a Permitted Acquisition), (bb) Net Cash Proceeds from sales and
issuances of such equity interests by or to, and the receipt of such capital
contributions by, the Parent Guarantor or any of its Domestic Subsidiaries in an
aggregate amount not to exceed $750,000 during the term of this Agreement and
(cc) the Equity Contributions, or (D) any Extraordinary Receipt received by or
paid to or for the account of the Parent Guarantor or any of its Domestic
Subsidiaries and not otherwise included in clause (A), (B) or (C) above, prepay
an aggregate principal amount of Advances comprising part of the same Borrowings
equal to the amount of such Net Cash Proceeds; provided that, in the case of any
                                               --------
event described in clause (A) of this Section 2.07(b)(ii)(x), if the Borrower
shall deliver to the Agent a certificate of a Responsible Officer of the
Borrower to the effect that the Borrower and its Subsidiaries intend to apply
the Net Cash Proceeds from such event (or a portion thereof specified in such
certificate), within 270 days after receipt of such Net Cash Proceeds, to
acquire (xx) property or assets (other than Debt (which, for purposes of this
parenthetical, shall be deemed to exclude Cash Equivalents and Working Capital
Advances) or capital stock) to be used in the business of the Borrower or any of
its Subsidiaries, (yy) the capital stock of a Person that becomes a Subsidiary
of the Borrower as a result of the acquisition of such capital stock by the
Borrower or any of its Subsidiaries or (zz) capital stock constituting a
minority interest in any Person that at such time is a Subsidiary of the
Borrower (provided that any such Subsidiary described in clauses (yy) or (zz)
          --------
above is primarily engaged in the business of the Borrower or any of its
Subsidiaries), then no prepayment shall be required pursuant to this Section
2.07(b)(ii)(x) in respect of the Net Cash Proceeds in
<PAGE>

                                                                              51

respect of such event (or the portion of such Net Cash Proceeds specified in
such certificate, if applicable) except to the extent of any such Net Cash
Proceeds therefrom that have not been so applied by the end of such 270-day
period, at which time a prepayment shall be required in an amount equal to the
amount of such Net Cash Proceeds that have not been so applied; provided,
                                                                --------
however, that the Borrower shall not be required to prepay Advances pursuant to
-------
clause (A) of this Section 2.07(b)(ii)(x) to the extent that the aggregate
amount of Net Cash Proceeds from events described in such clause (A) received
during the term of this Agreement and not applied to acquire assets, property or
capital stock in accordance with and within the period prescribed by the first
proviso of this Section 2.07(b)(ii)(x) is less than $7,500,000. Each such
prepayment shall be allocated as follows:

          first, subject to Section 2.07(c), among the Term A Facility, the Term
          -----
     B Facility and the Acquisition Facility ratably (based on the then-
     outstanding aggregate principal amount of the Advances under each such
     Facility) and, within each such Facility, applied ratably to the remaining
     principal installments thereof, and

          second, to the extent that no Term Advances remain outstanding and the
          ------
     Acquisition Facility has been fully repaid and permanently reduced in full,
     to the Working Capital Facility as set forth in clause (v) below; and

     (y)  The Canadian Borrower shall, on the date of receipt of the Net Cash
Proceeds by the Canadian Borrower or any of its Subsidiaries from (A) the sale,
lease, transfer or other disposition of any assets of the Canadian Borrower or
any of its Subsidiaries (other than any sale, lease, transfer or other
disposition of assets pursuant to Section 5 02 (e)), (B) the incurrence or
issuance by the Canadian Borrower or any of its Subsidiaries of any Debt (other
than Debt incurred or issued pursuant to Section 5.02 (b)), (C) the sale or
issuance by the Canadian Borrower or any of its Subsidiaries to any Person
(other than the Canadian Borrower or any of its Subsidiaries) of any capital
stock or other ownership or profit interest, any securities convertible into or
exchangeable for capital stock or other ownership or profit interest or any
warrants, rights or options to acquire capital stock or other ownership or
profit interest, in each case of the Canadian Borrower or any of its
Subsidiaries, or (D) any Extraordinary Receipt received by or paid to or for the
account of the Canadian Borrower or any of its Subsidiaries and not otherwise
included in clause (A), (B) or (C) above, prepay an aggregate principal amount
of the Canadian Borrower Advances or Drawings comprising part of the same
Borrowing, equal to the amount of such Net Cash Proceeds.

          (iii) The Borrower shall, on each Business Day, prepay an aggregate
principal amount of the Working Capital Advances comprising part of the same
Borrowings, the Swing Line Advances and the Letter of Credit Advances equal to
the amount by which (A) the sum of the aggregate principal amount of (x) the
Working Capital Advances, (y) the Swing Line Advances and (z) the Letter of
Credit Advances then outstanding, plus the aggregate Available Amount of all
Letters of Credit then outstanding, exceeds (B) the Working Capital Facility.
<PAGE>

                                                                              52

          (iv)   The Borrower shall, on each Business Day, pay to the Agent for
deposit in the L/C Cash Collateral Account an amount sufficient to cause the
aggregate amount on deposit in such Account to equal the amount by which the
aggregate Available Amount of all Letters of Credit then outstanding exceeds the
Letter of Credit Facility on such Business Day.

          (v)    Prepayments of the Working Capital Facility made pursuant to
clause (i) or (ii) above shall be first applied to prepay Letter of Credit
                                  -----
Advances then outstanding until such Advances are paid in full, second applied
                                                                ------
to prepay Swing Line Advances then outstanding until such Advances are paid in
full, third applied to prepay Working Capital Advances then outstanding
      -----
comprising part of the same Borrowings (in the order designated by the Borrower)
until such Advances are paid in full and fourth deposited in the L/C Cash
                                         ------
Collateral Account to cash collateralize 100% of the Available Amount of the
Letters of Credit then outstanding; and the amount remaining (if any) after the
prepayment in full of the Letter of Credit Advances, Swingline Advances and
Working Capital Advances then outstanding and the cash collateralization of the
aggregate Available Amount of Letters of Credit then outstanding (the sum of
such prepayment amounts, cash collateralization amounts and remaining amount
being referred to herein as the "Reduction Amount") may be retained by the
                                 ----------------
Borrower and the Working Capital Facility shall be permanently reduced as set
forth in Section 2.06(b)(iv).  Upon the drawing of any Letter of Credit for
which funds are on deposit in the L/C Cash Collateral Account, such funds shall
be applied to reimburse the Issuing Bank or Working Capital Lenders, as
applicable.

          (vi)   Prepayments of the Acquisition Facility pursuant to Section
2.07(a) or 2.07(b)(i) or (ii) shall be applied to prepay Acquisition Advances
then outstanding comprising part of the same Borrowings until such Acquisition
Advances are paid in full, and thereafter the Acquisition Facility shall be
permanently reduced, in accordance with Section 2.06(b)(v), by the amount of any
prepayment of the Term Facilities and the Acquisition Facility pursuant to
Section 2.07(b)(i) or (ii) remaining (if any) after the prepayment in full of
the Term Advances and the Acquisition Advances then outstanding (the sum of the
aggregate amount applied to prepay Acquisition Advances and such remaining
amount being referred to herein as the "Acquisition Reduction Amount").
                                        ----------------------------

          (vii)  The Canadian Borrower shall, on each Canadian Business Day,
pay to the Agent for deposit in a cash collateral account an amount sufficient
to cause the aggregate amount on deposit in such account to equal the amount by
which the aggregate Face Amount of all Bankers' Acceptances then outstanding
under the Canadian Facility exceeds the Canadian Facility on such Canadian
Business Day.

          (viii) All prepayments under this subsection (b), other than
prepayments of Base Rate Advances pursuant to clause (iii), shall be made
together with accrued interest to the date of
<PAGE>

                                                                              53

such prepayment on the principal amount prepaid, together with any amounts owing
pursuant to Section 8.04(c).

          (ix) No prepayment shall be required to be made under subsections
(b)(i) and (ii) of this Section 2.07 unless the amount of such prepayment
exceeds $500,000 in the aggregate.

          (c)  Term B Opt-Out.  With respect to any prepayment of the Term
               --------------
Advances and Acquisition Advances pursuant to Section 2.07(b), the Agent shall
ratably pay the Term A Lenders, Term B Lenders and Acquisition Lenders as
provided in Section 2.07; provided, however, that any Term B Lender, at its
                          --------  -------
option, may, to the extent that Term A Advances or Acquisition Advances are
outstanding at the time of such prepayment, elect not to accept such prepayment,
in which event the provisions of the next sentence shall apply.  Any Term B
Lender may, to the extent that Term A Advances or Acquisition Advances are
outstanding at the time of any prepayment referred to in any Prepayment Notice,
elect not to accept its ratable share of such prepayment, by notice given to the
Agent not later than 11:00 A.M. (New York City time) on the first Business Day
prior to the scheduled Prepayment Date (such Term B Lender being a "Declining
                                                                    ---------
Lender").  On the Prepayment Date an amount equal to that portion of the
------
Prepayment Amount available to prepay Term B Advances (less any amounts that
would otherwise be payable to the Declining Lenders) shall be applied to prepay
Term B Advances owing to Term B Lenders other than Declining Lenders and any
amounts that would otherwise have been applied to prepay Term B Advances owing
to Declining Lenders shall instead be applied to prepay the remaining Term A
Advances and Acquisition Advances as provided in Sections 2.07(a) and 2.07(b),
provided that on prepayment in full of all Term A Advances and all Acquisition
--------
Advances, the remainder of any Prepayment Amount shall be applied ratably to
prepay Term B Advances owing to the Declining Lenders.

          SECTION 2.08.  Interest.  (a)  Availability of Types of Advances.
                         --------        ---------------------------------
Subject to the provisions of Sections 2.10 and 2.13, Canadian Borrower Advances
may be Canadian Prime Rate Advances only.

          (b)  Scheduled Interest.  The Applicable Borrower shall pay interest
               ------------------
on the unpaid principal amount of each Advance owing to each Lender from the
date of such Advance until such principal amount shall be paid in full, at the
following rates per annum:

          (i)  Base Rate Advances.  During such periods as such Advance is a
               ------------------
     Base Rate Advance, a rate per annum equal at all times to the sum of (A)
     the Base Rate in effect from time to time plus (B) (1) in the case of any
                                               ----
     Term B Advance, 2.50% or (2) in the case of any other Advance, the
     Applicable Margin in effect from time to time, payable in arrears quarterly
     on the last Business Day of each March, June, September and December during
     such periods, on the date such Base Rate Advance shall be Converted, on the
     date
<PAGE>

                                                                              54

     of any repayment thereof pursuant to Section 2.05, on the date of any
     prepayment thereof to the extent required under Section 2.07 and on the
     Termination Date.

          (ii)  Eurodollar Rate Advances.  During such periods as such Advance
                ------------------------
     is a Eurodollar Rate Advance, a rate per annum equal at all times
     during each Interest Period for such Advance to the sum of (A) the
     Eurodollar Rate for such Interest Period for such Advance plus (B) (1) in
                                                               ----
     the case of any Term B Advance, 3.50% or (2) in the case of any other
     Advance, the Applicable Margin in effect on the first day of such Interest
     Period, payable in arrears on the last day of such Interest Period and, if
     such Interest Period has a duration of more than three months, on each day
     that occurs during such Interest Period every three months from the first
     day of such Interest Period, on the date such Eurodollar Rate Advance shall
     be Converted, on the date of any repayment thereof pursuant to Section
     2.05, on the date of any prepayment thereof to the extent required under
     Section 2.07 and on the Termination Date.

          (iii) Canadian Prime Rate Advances.  During such periods as such
                ----------------------------
     Advance is a Canadian Prime Rate Advance, a rate per annum equal at all
     times to the sum of (A) the Canadian Prime Rate in effect from time to time
     plus (B) the Applicable Margin for Canadian Prime Rate Advances in effect
     ----
     from time to time, payable in arrears quarterly on the last Business Day of
     each March, June, September and December during such periods, on the date
     such Canadian Prime Rate Advance shall be Converted, on the date of any
     repayment thereof pursuant to Section 2.05, on the date of any prepayment
     thereof to the extent required under Section 2.07 and on the Termination
     Date.

          (c)   Default Interest.  Upon the occurrence and during the
                ----------------
continuance of an Event of Default, the Agent may, and upon the request of the
Required Lenders shall, require that the Applicable Borrower shall pay interest
on (i) the unpaid principal amount of each Advance made to such Applicable
Borrower and owing to each Lender, payable in U.S. Dollars or Canadian Dollars,
as the case may be, in arrears on the dates referred to in clauses (b)(i)
through (b)(iii) above or on demand, at a rate per annum equal at all times to
2% per annum above the rate per annum required to be paid on such Advance
pursuant to clauses (b)(i) through (b)(iii) above and (ii) to the fullest extent
permitted by law, the amount of any interest, fee or other amount payable under
the Loan Documents that is not paid when due, from the date such amount shall be
due (or, with respect to amounts other than principal, interest and fees, from
30 days after such amount is due) until such amount shall be paid in full,
payable in U.S. Dollars or Canadian Dollars, as the case may be, in arrears on
the date such amount shall be paid in full or on demand, at a rate per annum
equal at all times to 2% per annum above the rate per annum required to be paid,
in the case of interest, on the Type of Advance on which such interest has
accrued pursuant to clauses (b)(i) through (b)(iii) above, and, in all other
cases, on Base Rate Advances pursuant to clause (b)(i) above.
<PAGE>

                                                                              55

          (d) Notice of Interest Rate.  Promptly after receipt of a Notice of
              -----------------------
Borrowing pursuant to Section 2.02(a), the Agent shall give notice to the
Applicable Borrower and each Appropriate Lender of the applicable interest rate
determined by the Agent for purposes of clause (b) above.

          (e) BA Rate Determination.  If the Reuters Screen CDOR Page is not
              ---------------------
available for the timely determination of the BA Rate, and the BA Rate for any
Bankers' Acceptances can not otherwise be determined in a timely manner in
accordance with the definition of "BA Rate", the Agent shall forthwith notify
the Canadian Borrower and the Canadian Lenders that such interest rate cannot be
determined for such Bankers' Acceptances, and the obligation of the Canadian
Lenders to make, or to renew, Bankers' Acceptances shall be suspended until the
Agent shall notify the Canadian Borrower and the Canadian Lenders that the
circumstances causing such suspension no longer exist.

          (f) Interest Act (Canada).  Whenever a rate of interest hereunder is
              ---------------------
calculated on the basis of a year (the "deemed year") which contains fewer days
                                        -----------
than the actual number of days in the calendar year of calculation, such rate of
interest shall be expressed as a yearly rate for purposes of the Interest Act
(Canada) by multiplying such rate of interest by the number of days in the
deemed year and dividing it by the actual number of days in the calendar year of
calculation.

          (g) Nominal Rates; No Deemed Reinvestment.  The principle of deemed
              -------------------------------------
reinvestment of interest shall not apply to any interest calculation under this
Agreement; all interest payments to be made hereunder shall be paid without
allowance or deduction for reinvestment or otherwise, before and after maturity,
default and judgment.  The rates of interest specified in this Agreement are
intended to be nominal rates and not effective rates.  Interest calculated
hereunder shall be calculated using the nominal rate method and not the
effective rate method of calculation.

          (h) Interest Paid by the Canadian Borrower.  Notwithstanding any
              --------------------------------------
provision of this Agreement, in no event shall the aggregate "interest" (as
defined in Section 347 of the Criminal Code (Canada)) payable by the Canadian
Borrower under this Agreement exceed the effective annual rate of interest on
the "credit advanced" (as defined in Section 347 of the Criminal Code (Canada))
under this Agreement lawfully permitted by that Section and, if any payment,
collection or demand pursuant to this Agreement in respect of "interest" (as
defined in Section 347 of the Criminal Code (Canada)) is determined to be
contrary to the provisions of that Section, such payment, collection or demand
shall be deemed to have been made by mutual mistake of the Canadian Borrower and
the Canadian Lenders and the amount of such payment or collection shall be
refunded to the Canadian Borrower.  For the purposes of this Agreement, the
effective annual rate of interest shall be determined in accordance with
generally accepted actuarial practices and principles over the relevant term
and, in the event of a dispute, a
<PAGE>

                                                                              56

certificate of a Fellow of the Canadian Institute of Actuaries appointed by the
Canadian Lenders will be prima facie evidence of such rate.

          SECTION 2.09.  Fees.  (a)  Commitment Fees.  (x) The Borrower shall
                         ----        ---------------
pay to the Agent for the account of the Working Capital Lenders a commitment
fee, from the date hereof in the case of each Initial Lender that is a Working
Capital Lender and from the effective date specified in the Assignment and
Acceptance pursuant to which it became a Working Capital Lender in the case of
each other Lender until the Termination Date, payable in arrears quarterly on
the last Business Day of each March, June, September and December, commencing
December 31, 1999, and on the Termination Date, at a rate per annum equal to the
Applicable Margin on the average daily Unused Working Capital Commitment of such
Lender; and (y) the Borrower shall pay to the Agent for the account of the
Acquisition Lenders a commitment fee, from the date hereof in the case of each
Initial Lender that is an Acquisition Lender and from the effective date
specified in the Assignment and Acceptance pursuant to which it became an
Acquisition Lender in the case of each other Lender until the Conversion Date,
payable in arrears quarterly on the last Business Day of each March, June,
September and December, commencing December 31, 1999, and on the Conversion
Date, at a rate per annum equal to the Applicable Margin on the average daily
Unused Acquisition Commitment of such Lender.

          (b)  Letter of Credit Fees, Etc.  (i)  The Borrower shall pay to the
               --------------------------
Agent for the account of each Working Capital Lender a commission, payable in
arrears quarterly on the last Business Day of each March, June, September and
December, commencing December 31, 1999, and on the Termination Date, on such
Lender's Pro Rata Share of the average daily aggregate Available Amount during
such quarter of all Letters of Credit outstanding from time to time at the rate
per annum equal to the Applicable Margin for Eurodollar Rate Borrowings under
the Working Capital Facility as in effect from time to time.

          (ii) The Borrower shall pay to the Issuing Bank, for its own account,
such commissions, issuance fees, fronting fees, transfer fees and other fees and
charges in connection with the issuance or administration of each Letter of
Credit as the Borrower and the Issuing Bank shall agree.

          (c)  Agent's Fees.  Each Applicable Borrower shall pay to the Agent
               ------------
for its own account such fees as may from time to time be agreed between such
Applicable Borrower and the Agent.

          (d)  Stamping Fees.  The Canadian Borrower shall, on the date of each
               -------------
Drawing and on the date of each renewal of any outstanding Bankers' Acceptances,
pay to the Agent, in Canadian Dollars, for the ratable account of the Canadian
Lenders accepting Drafts and purchasing Bankers' Acceptances, the Stamping Fee
with respect to such Bankers' Acceptances.  The Canadian Borrower irrevocably
authorizes each such Canadian Lender to deduct the Stamping Fee payable with
respect to each Bankers' Acceptance of such Canadian Lender from
<PAGE>

                                                                              57

the Drawing Purchase Price payable by such Canadian Lender in respect of such
Bankers' Acceptance in accordance with Section 2.04 and to apply such amount so
withheld to the payment of such Stamping Fee for the account of the Canadian
Borrower and, to the extent such Stamping Fee is so withheld and legally
permitted to be so applied, the Canadian Borrower's obligations under the
preceding sentence in respect of such Stamping Fee shall be satisfied.

          SECTION 2.10.  Conversion of Advances. (a)  Optional. (X) The
                         ----------------------       --------
Borrower may on any Business Day, upon notice given to the Agent not later than
11:00 A.M. (New York City time) on the third Business Day prior to the date of
the proposed Conversion and subject to the provisions of Sections 2.08 and 2.12,
Convert all or any portion of the Advances of one Type comprising the same
Borrowing into Advances of the other Type; provided, however, that if any
                                           --------  -------
Conversion of Eurodollar Rate Advances into Base Rate Advances is made other
than on the last day of an Interest Period for such Eurodollar Rate Advances the
Borrower shall also pay any amounts owing pursuant to Section 8.04(c), any
Conversion of Base Rate Advances into Eurodollar Rate Advances shall be in an
amount not less than the minimum amount specified in Section 2.02(c), no
Conversion of any Advances shall result in more separate Borrowings than
permitted under Section 2.02(c) and each Conversion of Advances comprising part
of the same Borrowing under any Facility shall be made ratably among the
Appropriate Lenders in accordance with their Commitments under such Facility.
Each such notice of Conversion shall, within the restrictions specified above,
specify (i) the date of such Conversion, (ii) the Advances to be Converted and
(iii) if such Conversion is into Eurodollar Rate Advances, the duration of the
initial Interest Period for such Advances.  Each notice of Conversion shall be
irrevocable and binding on the Borrower; and (Y) The Canadian Borrower may on
                                         ---
any Business Day, upon notice given to the Agent not later than 12:00 noon (New
York City time) on a Business Day at least two Canadian Business Days prior to
the date of the proposed conversion and subject to the provisions of Sections
2.08 or 2.12, convert all or any portion of the Canadian Prime Rate Advances
comprising part of the same Borrowing to Drawings in accordance with Section
2.04(a) hereof.  Each such notice of Conversion shall specify (A) the date of
such Conversion, (B) the Canadian Prime Rate Advances to be Converted, (C) if
less than all of the Canadian Prime Rate Advances comprising part of any
Borrowing are to be Converted, the aggregate amount of Canadian Prime Rate
Advances to be so Converted and (D) the initial term to maturity of the Bankers'
Acceptances (which shall comply with the definition of "Maturity Date" in
Section 1.01); provided, however, that, if the Agent determines in good faith
               --------  -------
(which determination shall be conclusive and binding upon the Canadian Borrower)
that the Bankers' Acceptances cannot be Converted ratably by the Canadian
Lenders, due solely to the requested aggregate Face Amount thereof, the
aggregate Face Amount of Bankers' Acceptances to be created and purchased by any
Canadian Lender shall be reduced to such lesser amount as the Agent determines
will permit such Conversion to be so made and each Canadian Lender shall
continue to maintain a Canadian Prime Rate Advance in the amount of the
difference between such Canadian Lender's ratable portion of the original
aggregate amount of the Canadian Prime Rate Advances to be Converted and the
Face Amount of the Bankers' Acceptances to be created
<PAGE>

                                                                              58

by such Canadian Lender after giving effect to such Conversion. Each notice of
Conversion under this Section 2.10 shall be irrevocable and binding on the
Canadian Borrower.

          (b)    Mandatory.  (i)  On the date on which the aggregate unpaid
                 ---------
principal amount of Eurodollar Rate Advances comprising any Borrowing shall be
reduced, by payment or prepayment or otherwise, to less than $1,000,000, such
Advances shall automatically Convert into Base Rate Advances.

          (ii)   If the Borrower shall fail to select the duration of any
Interest Period for any Eurodollar Rate Advances in accordance with the
provisions contained in the definition of "Interest Period" in Section 1.01, the
Agent will forthwith so notify the Borrower and the Appropriate Lenders,
whereupon each such Eurodollar Rate Advance will automatically, on the last day
of the then existing Interest Period therefor, Convert into a Base Rate Advance.

          (iii)  Upon the occurrence and during the continuance of any Event of
Default and the determination of the Agent, or the Required Lenders, that any or
all Eurodollar Rate Advances and any or all Conversions are not appropriate, (x)
the applicable Eurodollar Rate Advance will automatically, on the last day of
the then existing Interest Period therefor, Convert into a Base Rate Advance and
(y) the obligation of the Lenders to make, or to Convert the applicable Advances
into, Eurodollar Rate Advances shall be suspended.

          SECTION 2.11.  Renewal and Conversion of Bankers' Acceptances.  (a)
                         ----------------------------------------------
Optional Renewal.  The Canadian Borrower may on any Business Day, upon notice
----------------
given to the Agent not later than 12:00 noon (New York City time) on a Business
Day at least two Canadian Business Days prior to the date of the proposed
renewal and subject to the provisions of Section 2.12, renew all or any portion
of the Bankers' Acceptances comprising part of the same Drawing; provided,
                                                                 --------
however, that:
-------

          (i)    any renewal of Bankers' Acceptances shall be made only on the
     then existing Maturity Date for such Bankers' Acceptances;

          (ii)   each renewal of Bankers' Acceptances comprising part of the
     same Drawing shall be made ratably among the Lenders holding such Bankers'
     Acceptances in accordance with the respective amount of such Bankers'
     Acceptances so held; and

          (iii)  upon the occurrence and during the continuance of any Event of
     Default and the determination of the Agent, or Canadian Lenders owning or
     holding at least 51% of the sum of (x) the aggregate principal amount of
     the Canadian Borrower Advances outstanding at such time, (y) the aggregate
     Face Amount of all Bankers' Acceptances outstanding at such time and (z)
     the aggregate Unused Canadian Commitments at such time, that any or all
     Bankers' Acceptances and any or all renewals of any Bankers' Acceptances
     are not appropriate, no renewal of any Bankers' Acceptance may be made.
<PAGE>

                                                                              59

Each such notice of renewal shall, within the restrictions set forth above,
specify (A) the date of such renewal (which shall be the then existing Maturity
Date of such Bankers' Acceptances and shall be a Canadian Business Day), (B) the
Bankers' Acceptances to be renewed, (C) if less than all of the Bankers'
Acceptances comprising part of any Drawing are to be renewed, the aggregate Face
Amount for such renewal and (D) the term to maturity of the renewed Bankers'
Acceptances (which shall comply with the definition of "Maturity Date" in
Section 1.01); provided, however, that, if the Agent determines in good faith
               --------  -------
(which determination shall be conclusive and binding upon the Canadian Borrower)
that the Bankers' Acceptances cannot, due solely to the requested aggregate Face
Amount thereof, be renewed ratably by the Canadian Lenders, the aggregate Face
Amount of such renewal (or the Face Amount of Bankers' Acceptances to be created
by any Canadian Lender) shall be reduced to such lesser amount as the Agent
determines will permit such renewal to be so made and each Canadian Lender shall
fund the difference between such Canadian Lender's ratable portion of the
original aggregate Face Amount of such renewal and the Face Amount of the
Bankers' Acceptances to be created by such Canadian Lender after giving effect
to such reduction in the form of a Canadian Prime Rate Advance, which shall be
deemed for all purposes hereof to be a Canadian Borrower Advance made pursuant
to Section 2.01(d). Each notice of renewal under this Section 2.11 shall be
irrevocable and binding on the Canadian Borrower. Upon any renewal of Bankers'
Acceptances comprising part of any Drawing in accordance with this Section
2.11(a), the Canadian Lenders holding the Bankers' Acceptances to be renewed
shall exchange such maturing Bankers' Acceptances for new Bankers' Acceptances
containing the terms set forth in the applicable notice of renewal, and the
Drawing Purchase Price payable for each such renewal shall be applied, together
with other funds, if necessary, available to the Canadian Borrower, to reimburse
the Bankers' Acceptances otherwise maturing on such date. The Canadian Borrower
hereby irrevocably authorizes and directs each Canadian Lender to apply the
proceeds of each renewed Bankers' Acceptance owing to it to the reimbursement,
in accordance with this Section 2.11(a), of the Bankers' Acceptances owing to
such Canadian Lender and maturing on such date.

          (b)  Optional Conversion.  The Canadian Borrower may on any Business
               -------------------
Day, upon notice given to the Agent not later than 12:00 noon (New York City
time) on a Business Day at least two Canadian Business Days prior to the date of
the proposed Conversion and subject to the provisions of Section 2.12, Convert
all or any portion of the Bankers' Acceptances comprising part of the same
Drawing to a Canadian Borrowing comprised of Canadian Prime Rate Advances;
provided, however, that:
--------  -------

          (i)    any Conversion of Bankers' Acceptances shall be made only on
     the then existing Maturity Date for such Bankers' Acceptances;

          (ii)   each Conversion of Bankers' Acceptances comprising part of the
     same Drawing shall be made ratably among the Lenders holding such Bankers'
     Acceptances in accordance with the respective amounts of such Bankers'
     Acceptances so held; and
<PAGE>

                                                                              60

          (iii)  no Conversion may be made if (A) the amount of the Advance to
     be made by any Canadian Lender in connection with such Conversion would
     exceed such Canadian Lender's unused portion of its Canadian Commitment
     under the Canadian Facility in effect at the time of such Conversion, or
     (B) after giving effect to such Conversion, the sum of the aggregate
     principal amount of outstanding Canadian Borrower Advances plus the
                                                                ----
     aggregate Face Amount of Bankers' Acceptances then outstanding would exceed
     the Canadian Facility.

Each such notice of Conversion shall, within the restrictions set forth above,
specify (A) the date of such Conversion (which shall be the then existing
Maturity Date of such Bankers' Acceptances and shall be a Canadian Business
Day), (B) the Bankers' Acceptances to be Converted and (C) if less than all of
the Bankers' Acceptances comprising part of any Drawing are to be Converted, the
aggregate Face Amount of such Conversion. Each notice of Conversion under this
Section 2.11 shall be irrevocable and binding on the Canadian Borrower. Upon any
Conversion of Bankers' Acceptances comprising part of the same Drawing in
accordance with this Section 2.11(b), the obligation of the Canadian Borrower to
reimburse the Lenders under Section 2.13 in respect of the Bankers' Acceptances
otherwise maturing on such date shall, to the extent of such conversion, be
Converted to an obligation to reimburse the Lenders making the Canadian Borrower
Advances made in respect of such maturing Bankers' Acceptances on such date
ratably in accordance with the amount of the Advances held by such Lender at the
time of reimbursement. The Canadian Borrower hereby irrevocably authorizes and
directs each Canadian Lender to apply the net proceeds of each Canadian Prime
Rate Advance made by such Lender pursuant to this Section 2.11(b) to the
reimbursement of the Bankers' Acceptances owing to such Lender and maturing on
such date.

          (c)  Mandatory Conversion.  Upon the occurrence and during the
               --------------------
continuance of any Event of Default and the determination of the Agent, or
Canadian Lenders owning or holding at least 51% of the sum of (x) the aggregate
principal amount of the Canadian Borrower Advances outstanding at such time, (y)
the aggregate Face Amount of all Bankers' Acceptances outstanding at such time
and (z) the aggregate Unused Canadian Commitments at such time, that any or all
Bankers' Acceptances and any or all renewals of any Bankers' Acceptances are not
appropriate, or if the Canadian Borrower shall fail (i) to deliver a properly
completed notice of renewal under Section 2.11(a) or a properly completed notice
of Conversion under Section 2.11(b) indicating its intention to renew or to
Convert any maturing Bankers' Acceptances or (ii) to reimburse the Canadian
Lenders for any Bankers' Acceptances comprising part of the same Drawing
pursuant to Section 2.05, the Agent will forthwith so notify the Canadian
Borrower and the Canadian Lenders, whereupon each such Bankers' Acceptance will
automatically, on the then existing Maturity Date of such Bankers' Acceptances,
Convert into a Canadian Prime Rate Advance.
<PAGE>

                                                                              61

          SECTION 2.12.  Increased Costs, Etc. (a) If, due to either (i) the
                         --------------------
introduction of or any change in or in the interpretation of any law or
regulation made following the date hereof or (ii) the compliance with any
guideline or request (whether or not having the force of law) from any central
bank or other governmental authority or the National Association of Insurance
Commissioners introduced or made following the date hereof, there shall be:

          (A) any increase in the cost to any Lender Party of agreeing to make
     or of making, funding or maintaining Eurodollar Rate Advances or of
     agreeing to issue or of issuing or maintaining Letters of Credit or of
     agreeing to make or of making or maintaining Letter of Credit Advances;

          (B) any increase in the cost to any Lender Party of agreeing to
     perform or of performing its obligations under this Agreement under or in
     respect of Bankers' Acceptances; or

          (C) any reduction in any amount payable to, or any increase in any
     payment required to be made by, or any forgiveness or reduction of
     effective return to, any Lender Party under this Agreement under or in
     respect of any Bankers' Acceptances;

(excluding for purposes of this Section 2.12(a) any such increased cost
resulting from (x) taxes (as to which Section 2.14 shall govern) and (y) the
imposition of, or a change in the rate of, taxes described in clauses (i) and
(ii) of the first sentence of Section 2.14(a)) then the Applicable Borrower
shall from time to time, upon demand, and notice of the event by reason of which
such Lender Party has become entitled to compensation hereunder, by such Lender
Party (with a copy of such demand and notice to the Agent), pay (without
duplication) to the Agent for the account of such Lender Party additional
amounts sufficient to compensate such Lender Party for such increased cost. A
certificate as to the amount of such increased cost, submitted to the Applicable
Borrower by such Lender Party, shall be conclusive and binding for all purposes,
absent manifest error.

          (b)  If any Lender Party determines that compliance with any law or
regulation or any guideline or request (whether or not having the force of law)
from any central bank or other governmental authority or the National
Association of Insurance Commissioners introduced or made following the date
hereof affects the amount of capital required to be maintained by such Lender
Party or any corporation controlling such Lender Party and that the amount of
such capital is increased by or based upon the existence of such Lender Party's
commitment to lend, to accept, purchase and/or discount Bankers' Acceptances or
to issue Letters of Credit hereunder and other commitments of such type or the
purchase and/or acceptance and maintenance of Bankers' Acceptances or the
issuance or maintenance of the Letters of Credit (or similar contingent
obligations) hereunder, then, upon demand, and notice of the event by reason of
which such Lender Party has become entitled to compensation hereunder, by such
Lender Party (with a copy of such demand to the Agent), the Applicable Borrower
shall pay (without
<PAGE>

                                                                              62

duplication) to the Agent for the account of such Lender Party, from time to
time as specified by such Lender Party, additional amounts sufficient to
compensate such Lender Party in the light of such circumstances, to the extent
that such Lender Party reasonably determines such increase in capital to be
allocable to the existence of such Lender Party's commitment to lend, to accept,
purchase and/or discount Bankers' Acceptances or to issue Letters of Credit
hereunder or to the purchase and/or acceptance and maintenance of Bankers'
Acceptances or the issuance or maintenance of any Letters of Credit hereunder. A
certificate as to such amounts submitted to the Applicable Borrower by such
Lender Party shall be conclusive and binding for all purposes, absent manifest
error.

          (c)  If, with respect to any Eurodollar Rate Advances under any
Facility, Lenders owed at least 50% of the then-outstanding aggregate principal
amount thereof notify the Agent that the Eurodollar Rate for any Interest Period
for such Advances will not adequately reflect the cost to such Lenders of
making, funding or maintaining their Eurodollar Rate Advances for such Interest
Period, the Agent shall forthwith so notify the Applicable Borrower and the
Lenders, whereupon (i) each such Eurodollar Rate Advance under any Facility will
automatically, on the last day of the then existing Interest Period therefor,
Convert into a Base Rate Advance and (ii) the obligation of the Lenders to make,
or to Convert Advances into, Eurodollar Rate Advances shall be suspended until
the Agent shall notify the Applicable Borrower that such notifying Lenders have
determined that the circumstances causing such suspension no longer exist.

          (d)  Notwithstanding any other provision of this Agreement, if the
introduction of or any change in or in the interpretation of any law or
regulation made following the date hereof shall make it unlawful, or any central
bank or other governmental authority shall assert that it is unlawful, for any
Lender or its Eurodollar Lending Office to perform its obligations hereunder to
make Eurodollar Rate Advances or to continue to fund or maintain Eurodollar Rate
Advances hereunder, then, on notice thereof and demand therefor by such Lender
to the Applicable Borrower through the Agent, (i) such Lender's Eurodollar Rate
Advance under each Facility under which such Lender has a Commitment will
automatically, upon such demand, Convert into a Base Rate Advance, on the
respective last days of the then current Interest Periods with respect to such
Advances or within such earlier period as required by law and (ii) the
obligation of such Lender to make, or to Convert Advances into, Eurodollar Rate
Advances shall be suspended until the Agent shall notify the Applicable Borrower
that such Lender has determined that the circumstances causing such suspension
no longer exist.

          (e)  Notwithstanding any other provision of this Agreement, if the
introduction of or any change in the interpretation of any law or regulation
made following the date hereof shall make it unlawful, or any central bank or
other governmental authority shall assert following the date hereof that it is
unlawful, for any Canadian Lender or its BA Lending Office to perform its
obligations hereunder to complete and accept Drafts, to purchase Bankers'
Acceptances or to continue to fund or maintain Bankers' Acceptances hereunder,
then, on notice thereof and
<PAGE>

                                                                              63

demand therefor by such Canadian Lender to the Canadian Borrower through the
Agent (i) an amount equal to the aggregate Face Amount of all Bankers'
Acceptances outstanding at such time shall, upon such demand (which shall only
be made if deemed necessary by the applicable Canadian Lender to comply with
applicable law), be deposited by the Canadian Borrower into the Canadian Cash
Collateral Account until the Maturity Date of each such Bankers' Acceptance,
(ii) upon the Maturity Date of any Bankers' Acceptance in respect of which any
such deposit has been made, the Agent shall be, and hereby is, authorized
(without notice to or any further action by the Canadian Borrower) to apply, or
to direct the Agent to apply, such amount (or the applicable portion thereof) to
the reimbursement of such Bankers' Acceptance and (iii) the obligation of the
Canadian Lenders to complete and accept Drafts and purchase Bankers' Acceptances
shall be suspended until the Agent shall notify the Canadian Borrower that such
Lender has determined that the circumstances causing such suspension no longer
exist.

          (f)  Failure or delay on the part of any Lender Party to demand
compensation pursuant to this Section shall not constitute a waiver of such
Lender Party's right to demand such compensation; provided that the Borrower
                                                  --------
shall not be required to compensate a Lender Party pursuant to this Section for
any increased costs or reductions incurred more than 180 days prior to the date
that such Lender Party, as the case may be, notifies the Borrower of the
circumstances giving rise to such increased costs or reductions and of such
Lender Party's intention to claim compensation therefor; provided further that,
                                                         -------- -------
if the circumstances giving rise to such increased costs or reductions is
retroactive, then the 180-day period referred to above shall be extended to
include the period of retroactive effect thereof.

          SECTION 2.13.  Payments and Computations. (a) The Borrower shall make
                         -------------------------
each payment hereunder irrespective of any right of counterclaim or set-off, not
later than 11:00 A.M. (New York City time) on the day when due in U.S. dollars
to the Agent at the Agent's Account in same day funds. The Canadian Borrower
shall make each payment hereunder irrespective of any right or counterclaim or
set-off, not later than 11:00 A.M. (New York City time) on the day when due in
like funds as advanced to the Agent in same day funds by deposit of such funds
to the applicable Agent's Account. The Agent will promptly thereafter cause like
funds to be distributed (i) if such payment by the Borrower or the Canadian
Borrower, as applicable, is in respect of principal, interest, commitment fees
or any other Obligation then payable hereunder to more than one Lender Party, to
such Lender Parties for the account of their respective Applicable Lending
Offices ratably in accordance with the amounts of such respective Obligations
then payable to such Lender Parties and (ii) if such payment by the Borrower or
the Canadian Borrower, as applicable, is in respect of any Obligation then
payable hereunder to one Lender Party, to such Lender Party for the account of
its Applicable Lending Office, in each case to be applied in accordance with the
terms of this Agreement. Upon its acceptance of an Assignment and Acceptance and
recording of the information contained therein in the Register pursuant to
Section 8.07(e), from and after the effective date of such Assignment and
Acceptance, the Agent shall make all payments hereunder in respect of the
interest assigned thereby to the Lender Party assignee thereunder, and the
parties to such Assignment and
<PAGE>

                                                                              64

Acceptance shall make all appropriate adjustments in such payments for periods
prior to such effective date directly between themselves.

          (b)  Subject to subsection (g) of this Section 2.13, if the Agent
receives funds for application to the Obligations under the Loan Documents under
circumstances for which the Loan Documents do not specify the Advances or the
Facility to which, or the manner in which, such funds are to be applied, the
Agent may, but shall not be obligated to, elect to distribute such funds to each
Lender Party ratably in accordance with such Lender Party's proportionate share
of the principal amount of all outstanding Advances, the Face Amount of all
outstanding Bankers' Acceptances and the Available Amount of all Letters of
Credit then outstanding, in repayment or prepayment of such of the outstanding
Advances or other Obligations owed to such Lender Party, and for application to
such principal installments, as the Agent shall direct.

          (c)  Subject to subsection (g) of this Section 2.13, each of the
Borrower and the Canadian Borrower hereby authorizes each Lender Party, if and
to the extent payment owed to such Lender Party is not made when due hereunder,
to charge from time to time against any or all of the accounts of the Borrower
or the Canadian Borrower, as the case may be, with such Lender Party any amount
so due.

          (d)  Subject to Section 2.08(f), all computations of interest, fees
and Letter of Credit commissions shall be made by the Agent on the basis of a
year of 360 days, in each case for the actual number of days (including the
first day but excluding the last day) occurring in the period for which such
interest, fees or commissions are payable. Each determination by the Agent of an
interest rate, fee or commission hereunder shall be conclusive and binding for
all purposes, absent manifest error. At the request of the Applicable Borrower,
the Agent shall deliver to the Applicable Borrower a statement showing
quotations used by the Agent in determining such interest rate, fee and
commission.

          (e)  Whenever any payment hereunder or in respect of Bankers'
Acceptances shall be stated to be due on a day other than a Business Day or a
Canadian Business Day, as the case may be, such payment shall be made on the
next succeeding Business Day or Canadian Business Day, as applicable, and such
extension of time shall in such case be included in the computation of payment
of interest or commitment fee, as the case may be; provided, however, that, if
                                                   --------  -------
such extension would cause payment of interest on or principal of Eurodollar
Rate Advances to be made in the next following calendar month, such payment
shall be made on the next preceding Business Day.

          (f)  Unless the Agent shall have received notice from the Borrower or
the Canadian Borrower prior to the date on which any payment is due to any
Lender Party hereunder that the Borrower or the Canadian Borrower, as the case
may be, will not make such payment in full, the Agent may assume that the
Applicable Borrower has made such payment in full to the Agent on such date and
the Agent may, in reliance upon such assumption, cause to be distributed
<PAGE>

                                                                              65

to each such Lender Party on such due date an amount equal to the amount then
due such Lender Party. If and to the extent any Applicable Borrower shall not
have so made such payment in full to the Agent, each such Lender Party shall
repay to the Agent forthwith on demand such amount distributed to such Lender
Party together with interest thereon, for each day from the date such amount is
distributed to such Lender Party until the date such Lender Party repays such
amount to the Agent, at the higher of (A) the Federal Funds Rate and (B) the
cost of funds incurred by the Agent in respect of such amount.

          (g)  Notwithstanding any other provision of this Agreement or the
other Loan Documents to the contrary (including, without limitation, this
Section 2.13 and Sections 2.08, 2.09, 2.12, 2.14 and 8.04 hereof) the liability
of the Canadian Borrower under this Agreement shall be several and not joint or
joint and several. In no event shall the Canadian Borrower be liable for the
payment of any principal of or interest on any Advances other than Advances
borrowed by it hereunder, any commitment fees other than such fees payable with
respect to the maximum amount of the Canadian Facility, or any costs and
expenses under Section 8.04 hereof other than any such costs and expenses
relating to its indebtedness hereunder or the enforcement of its obligations
under this Agreement and the other Loan Documents. Any payment made by, or on
behalf of, the Canadian Borrower to the Agent's Account shall be deemed a
payment in respect of the Canadian Borrower Advances or any interest, fees,
costs or expenses, as applicable, payable with respect thereto.

          SECTION 2.14.  Taxes. (a) Any and all payments by the Borrower or the
                         -----
Canadian Borrower hereunder or in respect of any Bankers' Acceptance shall be
made, in accordance with Section 2.13, free and clear of and without deduction
or withholding for any and all present or future taxes, levies, imposts,
deductions, charges or withholdings, and all liabilities with respect thereto,
excluding, (i) in the case of each Lender Party and the Agent, taxes imposed
---------
on the overall net income of such Lender Party or Agent by any jurisdiction, and
franchise taxes imposed on such Lender Party or the Agent in lieu of net income
taxes by the jurisdiction under the laws of which such Lender Party or the Agent
(as the case may be) is organized or any political subdivision thereof or
therein and, in the case of each Lender Party, taxes imposed on its overall net
income and franchise taxes imposed on such Lender Party in lieu of net income
taxes by the state or foreign jurisdiction of such Lender Party's Applicable
Lending Office or any political subdivision thereof or therein and in the case
of the Agent, taxes imposed on its overall net income and franchise taxes
imposed on the Agent in lieu of net income taxes by the state or foreign
jurisdiction of the office or offices through which the Agent performs its
services pursuant to this Agreement and (ii) any tax, levies, imposts,
deductions, charges, withholdings and liabilities that would not have been
imposed but for the existence of any present or former connection between the
Agent or any Lender Party, as applicable (or between the shareholder of the
Agent or such Lender Party), and the taxing authority imposing such tax, levy,
impost, deduction, charge, withholding or liability including, without
limitation, the Agent or Lender Party, as relevant (or shareholders thereof)
being or having been a citizen or resident thereof, being or having been present
therein, being or having been engaged in a trade or business therein,
<PAGE>

                                                                              66

or having had a permanent establishment therein (but excluding in each case a
connection arising from the Agent's or any Lender Party's execution or
enforcement of or performance of its obligations under or receipt of payment
under this Agreement) (all such non-excluded taxes, levies, imposts, deductions,
charges, withholdings and liabilities being hereinafter referred to as "Taxes").
                                                                        -----
If the Borrower or the Canadian Borrower shall be required by law to deduct any
Taxes from or in respect of any sum payable hereunder or in respect of any
Bankers' Acceptance to any Lender Party or the Agent, (i) the sum payable shall
be increased as may be necessary so that after making all required deductions or
withholdings (including deductions applicable to additional sums payable under
this Section 2.14) such Lender Party or the Agent (as the case may be) receives
an amount equal to the sum it would have received had no such deductions or
withholdings been made, (ii) the Borrower or the Canadian Borrower, as the case
may be, shall make such deductions or withholdings and (iii) the Borrower or the
Canadian Borrower, as the case may be, shall pay the full amount deducted to the
relevant taxation authority or other authority in accordance with applicable
law.

          (b)  In addition, the Borrower and the Canadian Borrower shall pay any
present or future stamp, documentary, excise, property or similar taxes, charges
or levies that arise from any payment made by it hereunder or in respect of any
Bankers' Acceptances or from the execution, delivery or registration of, or
otherwise with respect to, this Agreement or any Bankers' Acceptances
(hereinafter referred to as "Other Taxes").
                             -----------

          (c)  The Borrower and the Canadian Borrower shall indemnify each
Lender Party and the Agent for the full amount of Taxes and Other Taxes
(including, without limitation, any Taxes or Other Taxes imposed by any
jurisdiction on amounts payable under this Section 2.14) paid by such Lender
Party or the Agent (as the case may be) and any liability (including penalties,
additions to tax, interest and expenses) arising therefrom or with respect
thereto. This indemnification shall be made within 30 days from the date such
Lender Party or the Agent (as the case may be) makes written demand therefor and
provides the Borrower and the Canadian Borrower with evidence of such liability
reasonably satisfactory to the Borrower and the Canadian Borrower.

          (d)  Within 30 days after the date of any payment of Taxes, the
Borrower shall furnish to the Agent, at its address referred to in Section 8.02,
the original receipt of payment thereof, a certified copy of such receipt or
other evidence of payment reasonably acceptable to the Agent.  In the case of
any payment hereunder by or on behalf of the Borrower through an account or
branch outside the United States or on behalf of the Borrower by a payor that is
not a United States person, if the Borrower determines that no Taxes are payable
in respect thereof, the Borrower shall furnish, or shall cause such payor to
furnish, to the Agent, at its address referred to in Section 8.02, an opinion of
counsel acceptable to the Agent stating that such payment is exempt from Taxes.
For purposes of this subsection (d) and subsection (e), the terms "United
                                                                   ------
States" and "United States person" shall have the meanings specified in Section
             --------------------
7701 of the Internal Revenue Code.  Within 30 days after the date of any payment
of Taxes, the Canadian
<PAGE>

                                                                              67

Borrower shall furnish to the Agent, at such address, the original receipt of
payment thereof, a certified copy of such receipt or other evidence of payment
reasonably acceptable to the Agent. In the case of any payment hereunder or in
respect of any Bankers' Acceptances by or on behalf of the Canadian Borrower
through an account or branch outside Canada or on behalf of the Canadian
Borrower by a payor that is not a corporation organized under the laws of
Canada, if the Canadian Borrower determines that no Taxes are payable in respect
thereof, the Canadian Borrower shall furnish, or shall cause such payor to
furnish, to the Agent, at such address, an opinion of counsel acceptable to the
Agent stating that such payment is exempt from Taxes.

          (e)  Each Lender Party organized under the laws of a jurisdiction
outside the United States shall, on or prior to the date of its execution and
delivery of this Agreement in the case of each Initial Lender or the Initial
Issuing Bank, as the case may be, and on the date of the Assignment and
Acceptance pursuant to which it became a Lender Party in the case of each other
Lender Party, and from time to time thereafter if requested in writing by the
Borrower or the Agent (but only so long thereafter as such Lender Party remains
lawfully able to do so and in any event prior to the date of the first payment
to such Lender Party hereunder), provide the Agent and the Borrower with two
duly completed and executed copies of Internal Revenue Service (the "IRS") Form
                                                                     ---
1001 or 4224, as appropriate, or any successor form prescribed by the IRS,
certifying (if it is the case) that such Lender Party is exempt from or is
entitled to a reduced rate of United States withholding tax on payments pursuant
to this Agreement or in respect of any Bankers' Acceptances or to the extent
permitted by law, as an alternative to such Form 1001 or 4224, each such Lender
Party may provide the Borrower and the Agent with two duly completed and
executed copies of IRS Form W-8, or any successor form prescribed by the IRS,
certifying that such Lender Party is exempt from United States federal
withholding tax pursuant to Section 871(h) or Section 881(c) of the Internal
Revenue Code, together with an annual certificate in form and substance
satisfactory to the Borrower or the Agent stating that such Lender Party is not
a "person" described in Section 871(h)(3) or 881(c)(3) of the Internal Revenue
Code.  In addition, each Canadian Lender shall provide the Agent and the
Canadian Borrower with any form or certificate certifying that such Canadian
Lender is exempt from or is entitled to a reduced rate of Canadian withholding
tax; provided, however, that each Canadian Lender shall have been advised in
     --------  -------
writing by the Canadian Borrower (including at the time any renewal form is due)
of the form or certificate applicable to it, determined by reference to the
jurisdiction of organization and Applicable Lending Office of such Canadian
Lender set forth on Schedule I hereto, in the case of each Initial Lender, or to
the jurisdiction of organization and Applicable Lending Office of such Canadian
Lender set forth in the Assignment and Acceptance pursuant to which it became a
Canadian Lender, in the case of each other Lender Party, or such other branch or
office of any Canadian Lender designated by such Canadian Lender from time to
time.  If the forms provided by a Lender Party at the time such Lender Party
first becomes a party to this Agreement indicates a tax rate with respect to
Home Jurisdiction Withholding Tax in excess of zero, withholding tax at such
rate shall be considered excluded from Taxes unless and until such Lender Party
provides the appropriate form certifying that a lesser rate applies, whereupon
such withholding tax at such lesser rate only shall be considered excluded from
Taxes
<PAGE>

                                                                              68

for periods governed by such form; provided, however, that, if at the date of
                                   --------  -------
the Assignment and Acceptance pursuant to which a Lender Party becomes a party
to this Agreement, the Lender Party assignor was entitled to payments under
subsection (a) in respect of Home Jurisdiction Withholding Tax with respect to
interest paid at such date, then, to such extent, the term Taxes shall include
(in addition to withholding taxes that may be imposed in the future or other
amounts otherwise includable in Taxes) Home Jurisdiction Withholding Tax, if
any, applicable with respect to the Lender Party assignee on such date. If any
form or document referred to in this subsection (e) requires the disclosure of
information not substantially similar to the information necessary to compute
the tax payable and information required on the date hereof by IRS Form 1001 or
4224, and which a Lender Party reasonably considers to be confidential, the
Lender Party shall give notice thereof to the Borrower or the Canadian Borrower,
as the case may be, and shall not be obligated to include in such form or
document such confidential information.

          (f)  For any period with respect to which a Lender Party has failed to
provide the Borrower or the Canadian Borrower, as applicable, with the
appropriate form described in subsection (e) above duly completed and executed
(other than if such failure is due to a change in law occurring after the date
 ----- ----
on which a form originally was required to be provided or if such form otherwise
is not required under subsection (e) above), such Lender Party shall not be
entitled to indemnification under subsection (a) or (c) of this Section 2.14
with respect to Taxes imposed by the United States or Canada, as applicable, by
reason of such failure; provided, however, that should a Lender Party become
                        --------  -------
subject to Taxes because of its failure to deliver a form required hereunder,
the Borrower or the Canadian Borrower, as applicable, shall take such steps as
such Lender Party shall reasonably request at such Lender Party's sole expense
to assist such Lender Party to recover such Taxes.

          (g)  Any Lender Party claiming additional amounts payable pursuant to
this Section 2.14 shall use reasonable efforts (consistent with its internal
policy and legal and regulatory restrictions) to file any certificate or
document requested by the Borrower or the Canadian Borrower, as the case may be,
or to change the jurisdiction of its Applicable Lending Office if the making of
such filing or change would avoid the need for or reduce the amount of any such
additional amounts which may thereafter accrue and would not, in the sole
judgment of such Lender Party, be disadvantageous to such Lender Party.

          (h)  If any Lender Party receives a refund of any Taxes or Other Taxes
paid by the Borrower or the Canadian Borrower, as the case may be, pursuant to
Section 2.14(a), Section 2.14(b), or Section 2.14(c), such Lender Party shall,
within 30 days of such receipt, pay to the Borrower or the Canadian Borrower, as
applicable, the amount so received, net of all out-of-pocket expenses of such
Lender Party with respect thereto; provided, however, that such Lender Party
                                   --------  -------
shall (i) be required to pay to such Borrower or Canadian Borrower only such
amounts as such Lender Party, in its sole discretion, determines is attributable
to Taxes or Other Taxes paid by such Borrower or Canadian Borrower pursuant to
Section 2.14(a), Section 2.14(b) or Section 2.14(c), and (ii) have the sole
discretion to determine whether to contest the
<PAGE>

                                                                              69

imposition of any Taxes or Other Taxes, regardless of whether such Taxes or
Other Taxes were correctly or legally asserted.

          SECTION 2.15.  Sharing of Payments, Etc.  If any Lender Party shall
                         ------------------------
obtain at any time any payment (whether voluntary, involuntary, through the
exercise of any right of set-off, or otherwise) (a) on account of Obligations
due and payable to such Lender Party hereunder and under any Bankers'
Acceptances at such time in excess of its ratable share (according to the
proportion of (i) the amount of such Obligations due and payable to such Lender
Party and under any Bankers' Acceptances at such time to (ii) the aggregate
amount of the Obligations due and payable to all Lender Parties hereunder and
under any Bankers' Acceptances at such time) of payments on account of the
Obligations due and payable to all Lender Parties hereunder and under any
Bankers' Acceptances at such time obtained by all the Lender Parties at such
time or (b) on account of Obligations owing (but not due and payable) to such
Lender Party hereunder and under any Bankers' Acceptances at such time in excess
of its ratable share (according to the proportion of (i) the amount of such
Obligations owing (but not due and payable) to such Lender Party and under any
Bankers' Acceptances at such time to (ii) the aggregate amount of the
Obligations owing (but not due and payable) to all Lender Parties hereunder and
under any Bankers' Acceptances at such time) of payments on account of the
Obligations owing (but not due and payable) to all Lender Parties hereunder and
under any Bankers' Acceptances at such time obtained by all of the Lender
Parties at such time, such Lender Party shall forthwith purchase from the other
Lender Parties such participations in the Obligations due and payable or owing
to them, as the case may be, as shall be necessary to cause such purchasing
Lender Party to share the excess payment ratably with each of them; provided,
                                                                    --------
however, that if all or any portion of such excess payment is thereafter
-------
recovered from such purchasing Lender Party, such purchase from each other
Lender Party shall be rescinded and such other Lender Party shall repay to the
purchasing Lender Party the purchase price to the extent of such Lender Party's
ratable share (according to the proportion of (i) the purchase price paid to
such Lender Party to (ii) the aggregate purchase price paid to all Lender
Parties) of such recovery together with an amount equal to such Lender Party's
ratable share (according to the proportion of (i) the amount of such other
Lender Party's required repayment to (ii) the total amount so recovered from the
purchasing Lender Party) of any interest or other amount paid or payable by the
purchasing Lender Party in respect of the total amount so recovered.  The
Borrower and the Canadian Borrower agree that any Lender Party so purchasing a
participation from another Lender Party pursuant to this Section 2.15 may, to
the fullest extent permitted by law, exercise all its rights of payment
(including the right of set-off) with respect to such participation as fully as
if such Lender Party were the direct creditor of such Borrower or Canadian
Borrower in the amount of such participation.

          SECTION 2.16.  Use of Proceeds. (a) The proceeds of the Term Advances
                         ---------------
shall be available (and the Borrower agrees that it shall use such proceeds)
solely (i) to finance the Acquisition, (ii) to refinance the Existing Debt and
(iii) to pay transaction fees and expenses;
<PAGE>

                                                                              70

          (b)  The proceeds of the Working Capital Advances and the issuances of
Letters of Credit shall be available (and the Borrower agrees that it shall use
such proceeds and Letters of Credit) solely (i) to provide for working capital
for the Borrower and the Canadian Borrower and (ii) for other general corporate
purposes permitted under this Agreement (other than Permitted Acquisitions);

          (c)  The proceeds of the Acquisition Advances shall be available (and
the Borrower agrees that it shall use such proceeds) solely to finance (i)
Permitted Acquisitions and (ii) to the extent not constituting Permitted
Acquisitions, the development and construction of asphalt production plants and
related facilities, provided that (A) immediately after giving effect to each
                    --------
Acquisition Advance made to finance such development and construction, on a pro
forma basis for the Rolling Period ended as of the end of the most recent period
for which financial statements were required to be furnished to the Agent
pursuant to Sections 5.03(b), (c) or (d), the Total Leverage Ratio of the Parent
Guarantor and its Subsidiaries shall be not more than 5.00 to 1.00, (B) prior to
each such Acquisition Advance, the Borrower shall have furnished to the Agent a
schedule in form satisfactory to the Agent of the computations used by the
Parent Guarantor in determining compliance with the requirement of clause (A)
above and (C) the Borrower shall have furnished to the Agent a certificate
signed by the chief financial officer or treasurer of the Parent Guarantor,
substantially in the form of Exhibit M-3, attesting to the Solvency of the
Parent Guarantor and its Subsidiaries as of the date of such Acquisition
Borrowing; and

          (d)  The proceeds of the Canadian Borrower Advances and the Drawings
under the Bankers' Acceptances shall be available (and the Canadian Borrower
agrees that it shall use such proceeds and Drawings) solely for general
corporate purposes of the Canadian Borrower permitted under this Agreement.

          SECTION 2.17.  Evidence of Debt. (a) Each Lender shall maintain in
                         ----------------
accordance with its usual practice an account or accounts evidencing the
indebtedness of the Applicable Borrower to such Lender resulting from each
Advance owing to such Lender from time to time, including the amounts of
principal and interest payable and paid to such Lender from time to time
hereunder.  The Applicable Borrower agrees that upon notice by any Lender Party
to such Applicable Borrower (with a copy of such notice to the Agent) to the
effect that a Note is required or appropriate in order for such Lender to
evidence (whether for purposes of pledge, enforcement or otherwise) the Advances
owing to, or to be made by, such Lender Party, the Applicable Borrower shall
promptly execute and deliver to such Lender a Term A Note, a Term B Note, a
Working Capital Note, a Canadian Borrower Note and an Acquisition Note, as
applicable, payable to the order of such Lender Party in a principal amount
equal to the Term A Commitment, the Term B Commitment, the Working Capital
Commitment, the Canadian Commitment or the Acquisition Commitment, respectively,
of such Lender Party at the time of such request.  All references to Notes in
the Loan Documents shall mean Notes, if any, to the extent issued hereunder.
<PAGE>

                                                                              71

          (b)  The Register maintained by the Agent pursuant to Section 8.07(e)
shall include a control account, and a subsidiary account for each Lender, in
which accounts (taken together) shall be recorded (i) the date and amount of
each Borrowing made hereunder, the Type of Advances comprising such Borrowing
and, if appropriate, the Interest Period applicable thereto, (ii) the terms of
each Assignment and Acceptance delivered to and accepted by it, (iii) the amount
of any principal or interest due and payable or to become due and payable from
the Applicable Borrower to each Lender Party hereunder, and (iv) the amount of
any sum received by the Agent from the Applicable Borrower hereunder and each
Lender Party's share thereof.

          (c)  Entries made in good faith by the Agent in the Register pursuant
to subsection (b) above, and by each Lender Party in its account or accounts
pursuant to subsection (a) above, shall be prima facie evidence of the amount of
                                           ----- -----
principal and interest due and payable or to become due and payable from the
Applicable Borrower to, in the case of the Register, each Lender Party and, in
the case of such account or accounts, such Lender Party, under this Agreement,
absent manifest error; provided, however, that the failure of the Agent or such
                       --------  -------
Lender Party to make an entry, or any finding that an entry is incorrect, in the
Register or such account or accounts shall not limit or otherwise affect the
obligations of the Applicable Borrower under this Agreement.

          (d)  References herein to Notes shall mean and be references to the
Term A Notes, the Term B Notes, the Working Capital Notes, the Canadian Borrower
Notes and the Acquisition Notes, unless otherwise specifically indicated, in
each case to the extent issued hereunder.

          SECTION 2.18.  Replacement of Lenders.  If any Lender requests
                         ----------------------
compensation under Section 2.12, if any Lender exercises its rights under
Section 2.12(d) or (e), if the Borrower is required to pay any additional amount
to any Lender or any taxing authority for the account of any Lender pursuant to
Section 2.14 or if any Lender shall abstain from approving or disapproving any
amendment, waiver or consent requested by the Borrower, then the Borrower may,
at its sole expense and effort, upon notice to such Lender and the Agent,
require such Lender to assign and delegate, without recourse (in accordance with
and subject to the restrictions contained in Section 8.07), all its interests,
rights and obligations under this Agreement to one or more Eligible Assignees
that shall assume such obligations, provided that (i) the Borrower shall have
                                    --------
received the prior written consent of the Agent (and, if a Working Capital
Commitment is being assigned, the Issuing Bank and the Swingline Bank), which
consent shall not unreasonably be withheld, (ii) such Lender shall have received
payment of an amount equal to the outstanding principal of its Advances, accrued
interest thereon, accrued fees and all other amounts payable to it hereunder
(including all losses, costs and expenses payable pursuant to Section 8.04 (c))
from such Eligible Assignee (to the extent of such outstanding principal and
accrued interest and fees) or the Borrower (in the case of all other amounts)
and (iii) in the case of any such assignment resulting from a claim for
compensation under
<PAGE>

                                                                              72

Section 2.12 or payments required to be made pursuant to Section 2.14, such
assignment will result in a reduction in such compensation or payments. A Lender
shall not be required to make any such assignment and delegation if, prior
thereto, the circumstances entitling the Borrower to require such assignment and
delegation cease to apply.

                                  ARTICLE III

                             CONDITIONS OF LENDING

          SECTION 3.01.  Conditions Precedent to Initial Extension of Credit.
                         ---------------------------------------------------
The obligation of each Lender to make an Advance, of the Issuing Bank to issue a
Letter of Credit and of the Canadian Lenders to accept and/or purchase Bankers'
Acceptances on the occasion of the Initial Extension of Credit hereunder is
subject to the satisfaction of the following conditions precedent before or
concurrently with the Initial Extension of Credit:

          (a)  The Purchase Agreement shall be in full force and effect and the
     Acquisition and the other transactions contemplated by this Agreement shall
     have been consummated strictly in accordance with the terms of the Purchase
     Agreement and all other related documentation without any waiver or
     amendment not consented to by the Lender Parties of any term, provision or
     condition set forth therein, and in compliance with all applicable laws,
     and the Agent shall be satisfied (i) with the terms and conditions of the
     Related Documents in all material respects and (ii) that the assets and
     earnings of the Borrower and the Canadian Borrower are sufficient to
     support the Obligations of the Borrower and the Canadian Borrower under
     this Agreement and the timely amortization of all Debt and other
     Obligations of the Borrower and the Canadian Borrower.

          (b)  The Lender Parties shall be satisfied with the corporate and
     legal structure and capitalization of the Loan Parties, including the terms
     and conditions of the charter, bylaws and each class of capital stock of
     the Loan Parties and of each agreement or instrument relating to such
     structure or capitalization.

          (c)  There shall have been no event, condition or circumstance that
     has resulted in or is reasonably likely to result in a Material Adverse
     Change with respect to the Borrower and its Subsidiaries, taken as a whole,
     since December 31, 1998, or with respect to the Acquired Businesses, taken
     as a whole, since March 31, 1999.

          (d)  There shall exist no action, suit, investigation, litigation or
     proceeding affecting any Loan Party or any of its properties or any of its
     Subsidiaries or any of their properties pending or threatened before any
     court, governmental agency or arbitrator that (i) could have a Material
     Adverse Effect or (ii) purports to affect the legality, validity or
<PAGE>

                                                                              73

     enforceability of this Agreement, any other Loan Document, any Related
     Document or the consummation of the transactions contemplated hereby and
     thereby.

          (e)  [Intentionally Omitted].

          (f)  The Agent shall be satisfied that all Existing Debt, other than
     the Debt identified on Schedule 3.01(f) (the "Surviving Debt"), has been
                                                   --------------
     prepaid, redeemed or defeased in full or otherwise satisfied and
     extinguished and that all such Surviving Debt shall be on terms and
     conditions satisfactory to the Agent. All accrued fees and expenses of the
     Agent and the Lender Parties (including the accrued fees and expenses of
     counsel to the Agent and of local counsel to the Lender Parties) payable by
     the Borrower hereunder and all fees and expenses payable or otherwise borne
     by the Borrower in connection with the issuance of the Subordinated Notes
     shall have been paid, and the Agent shall be satisfied that the amount of
     such fees and expenses shall not exceed $15,000,000.

          (g)  The Agent shall have received on or before the date of the
     Initial Extension of Credit, the following, each dated such day (unless
     otherwise specified), in form and substance satisfactory to the Agent
     (unless otherwise specified) and (except for any Notes or Drafts) in
     sufficient copies for each Lender Party:

               (i)    Notes payable to the order of the Lenders to the extent
          requested by any Lender pursuant to Section 2.17.

               (ii)   Presigned Drafts delivered pursuant to Section 2.04(f)
          hereof.

               (iii)  A Notice of Borrowing.

               (iv)   Certified copies of the resolutions (or analogous
          authorizations) of the Board of Directors (or other authorized legal
          representatives) of the Borrower, the Canadian Borrower, the Parent
          Guarantor, each Subsidiary Guarantor and each other Loan Party
          approving this Agreement, each other Loan Document and each Related
          Document to which it is or is to be a party, and of all documents
          evidencing other necessary corporate action and governmental and other
          third party approvals and consents, if any, with respect to this
          Agreement, each other Loan Document and each Related Document.

               (v)    A copy of a certificate of the Secretary of State of
          the jurisdiction of its incorporation, dated reasonably near the date
          of the Initial Extension of Credit, in each case listing the charter
          of the Borrower, the Parent Guarantor, each Subsidiary Guarantor and
          each other Loan Party and each amendment thereto on file in his office
          and certifying that (A) such charter is a true and correct copy
<PAGE>

                                                                              74

          thereof, (B) such amendments are the only amendments to such charter
          on file in his office, (C) such Person has paid all franchise taxes to
          the date of such certificate and (D) such Person is duly incorporated
          and in good standing under the laws of the State of the jurisdiction
          of its incorporation.

               (vi)   (A) A certificate of the Canadian Borrower certifying as
          to a true and correct copy of the articles of incorporation or
          amalgamation of the Canadian Borrower, together with any amendments
          thereto, and (B) a certificate of status of the Province of Ontario
          stating that the Canadian Borrower is a corporation incorporated,
          amalgamated or continued under the laws of the Province of Ontario and
          has not been dissolved.

               (vii)  A copy of a certificate of the Secretary of State of the
          states listed on Schedule 3.01(g)(vii) with respect to the Borrower
          and each Subsidiary Guarantor, dated reasonably near the date of the
          Initial Extension of Credit, stating that the Borrower and each such
          Subsidiary Guarantor is duly qualified and in good standing as a
          foreign corporation in such State and has filed all annual reports
          required to be filed to the date of such certificate.

               (viii) A certificate of each of the Borrower, the Canadian
          Borrower, the Parent Guarantor, each Subsidiary Guarantor and each
          other Loan Party, signed on behalf of such Person by any two officers
          of such Person, dated the date of the Initial Extension of Credit (the
          statements made in which certificate shall be true on and as of the
          date of the Initial Extension of Credit), certifying as to (A) the
          absence of any amendments to the charter of such Person since, in the
          case of the Canadian Borrower, the date of the certificate of status
          of the Province of Ontario referred to in Section 3.01(g)(vi)(B) and,
          in the case of each other Loan Party, the date of the Secretary of
          State's certificate referred to in Section 3.01(g)(v), (B) a true and
          correct copy of the bylaws of such Person as in effect on the date of
          the Initial Extension of Credit, (C) the due incorporation and good
          standing of such Person as a corporation organized under the laws of
          the jurisdiction of its incorporation and the absence of any
          proceeding for the dissolution or liquidation of such Person, (D) the
          completeness and accuracy of the representations and warranties made
          by such Loan Party contained in the Loan Documents as though made on
          and as of the date of the Initial Extension of Credit and (E) the
          absence of any event occurring and continuing that constitutes a
          Default.

               (ix)   A certificate of an officer of each of the Borrower, the
          Canadian Borrower, the Parent Guarantor, each Subsidiary Guarantor and
          each other Loan Party certifying the names and true signatures of the
          officers of such Persons authorized to sign this Agreement, each other
          Loan Document and each Related
<PAGE>

                                                                              75

          Document to which they are or are to be parties and the other
          documents to be delivered hereunder and thereunder.

               (x)  A security agreement in substantially the form of Exhibit D
          (together with each other security agreement delivered pursuant to
          Section 5.01(m), in each case as amended, supplemented or otherwise
          modified from time to time in accordance with its terms, the "Security
                                                                        --------
          Agreement"), duly executed by the Borrower and each Subsidiary
          ---------
          Guarantor, together with:

                         (A)  certificates representing the Existing Pledged
               Shares referred to therein accompanied by undated stock powers
               executed in blank,

                         (B)  copies of proper financing statements, under the
               Uniform Commercial Code of the states listed in Schedule
               3.01(g)(x)(A) and all other jurisdictions that the Agent may deem
               necessary or desirable in order to perfect and protect the Liens
               created under the Collateral Documents, covering the Collateral
               described in the Security Agreement,

                         (C)  completed requests for information, dated on or
               before the date of the Initial Extension of Credit, listing all
               effective financing statements filed in the jurisdictions listed
               in Schedule 3.01(g)(x)(B) that name the Borrower and each
               Subsidiary Guarantor as debtor, together with copies of such
               other financing statements,

                         (D)  evidence of the completion of all other recordings
               and filings of or with respect to the Security Agreement that the
               Agent may deem necessary or desirable in order to perfect and
               protect the Liens created thereby,

                         (E)  evidence of the insurance required by the terms of
               the Security Agreement, naming the Agent as additional insured
               and loss payee, in such amounts and covering such risks, as is
               satisfactory to the Agent, including, without limitation,
               business interruption insurance together with a certificate from
               a representative of an insurance company or from an independent
               insurance consultant confirming that the coverages are normal and
               customary for corporations comparable to the Borrower and each
               Subsidiary Guarantor,

                         (F)  copies of the Assigned Agreements referred to in
               the Security Agreement,
<PAGE>

                                                                              76

                         (G)  executed termination statements (Form UCC-3 or a
               comparable form), in proper form to be duly filed on the date of
               the Initial Extension of Credit under the Uniform Commercial Code
               of all jurisdictions that the Agent may deem desirable in order
               to terminate or amend existing Liens on the Collateral described
               in the Security Agreement and the Parent Guarantor Security
               Agreement,

                         (H)  evidence that all other action that the Agent may
               deem necessary or desirable in order to perfect and protect the
               liens and security interests created under the Security Agreement
               has been taken, and

                         (I)  the Blocked Account Letters referred to in the
               Security Agreement, duly executed by each Blocked Account Bank
               referred to in the Security Agreement.

               (xi) A security agreement in substantially the form of Exhibit G
          (as such agreement may be amended, supplemented or otherwise modified
          from time to time in accordance with its terms, the "Canadian Security
          Agreement"), duly executed by the Canadian Borrower, together with
          evidence that all other action that the Agent may deem necessary or
          desirable in order to perfect and protect the liens and security
          interests created under the Canadian Security Agreement has been
          taken.

               (xii) A security agreement in substantially the form of Exhibit E
          (as such agreement may be amended, supplemented or otherwise modified
          from time to time in accordance with its terms, the "Parent Guarantor
                                                               ----------------
          Security Agreement"), duly executed by the Parent Guarantor, together
          ------------------
          with:

                         (A)  certificates representing the Pledged Shares
               referred to therein accompanied by undated stock powers executed
               in blank, and

                         (B)  evidence that all other action that the Agent may
               deem necessary or desirable in order to perfect and protect the
               liens and security interests created under the Parent Guarantor
               Security Agreement has been taken.

               (xiii) An intellectual property security agreement in
          substantially the form of Exhibit F (together with each other
          intellectual property security agreement delivered pursuant to Section
          5.01(m), as amended, supplemented or otherwise modified from time to
          time in accordance with its terms, the "Intellectual Property Security
                                                  ------------------------------
          Agreement"), duly executed by the Borrower and each Subsidiary
          ---------
          Guarantor, together with evidence that all action that the Agent may
          deem
<PAGE>

                                                                              77

          necessary or desirable in order to perfect and protect the first
          priority lien and security interests created under the Intellectual
          Property Security Agreement has been taken.

               (xiv) Deeds of trust, trust deeds, mortgages, leasehold mortgages
          and leasehold deeds of trust in substantially the form of Exhibit J
          and covering the properties and Material Leases listed on Schedule
          4.01(gg) (other than the properties listed on Schedule 5.01(m)) and
          Schedule 4.01(hh) (together with each other mortgage delivered
          pursuant to Section 5.01(m), in each case as amended, supplemented or
          otherwise modified from time to time in accordance with their terms,
          the "Mortgages"), duly executed by the applicable Loan Party, together
               ---------
          with:

                         (A)  fully paid American Land Title Association
               Lender's Extended Coverage title insurance policies (the
               "Mortgage Policies") or commitments in writing to issue such
                -----------------
               policies in form and substance, with endorsements and in amount
               acceptable to the Agent, issued, coinsured and reinsured by title
               insurers acceptable to the Agent, insuring the Mortgages as of
               the time of the date of the Initial Extension of Credit to be
               valid first and subsisting Liens on the property described
               therein, free and clear of all defects (including, but not
               limited to, mechanics' and materialmen's Liens) and encumbrances,
               excepting only Permitted Encumbrances, and providing for such
               other affirmative insurance (including endorsements for future
               advances under the Loan Documents and for mechanics' and
               materialmen's Liens) and such coinsurance and direct access
               reinsurance as the Agent may deem necessary or desirable,

                         (B)  boundary surveys of the properties set forth on
               Schedule 3.01(g)(xiv)(B) prepared in accordance with American
               Land Title Insurance standards (except where surveys prepared to
               state standards are acceptable to the title insurer), dated no
               more than 30 days before the date of the Initial Extension of
               Credit, certified to the Agent and the issuer of the Mortgage
               Policies in a manner satisfactory to the Agent by a land surveyor
               duly registered and licensed in the States in which the property
               described in such surveys is located and acceptable to the Agent,
               showing recorded easements and rights of way, unrecorded uses and
               occupancies observed by the surveyor, encroachments onto the
               boundary lines and onto the easements and rights of way otherwise
               shown on the survey, any building setback lines and other
               dimensional regulations that are set forth in covenants and
               restrictions that may be of record and certifying that such
               property is not in a flood hazard area and identifying
<PAGE>

                                                                              78

               the flood classification thereof, or, as applicable, locating any
               portion of such property that is in a flood hazard area,

                         (C)  an affidavit of the applicable Loan Party
               delivered for the benefit of the issuer of the Mortgage Policies
               stating that, since the date of the survey referenced in the
               Mortgage Policies in respect of the properties set forth on
               Schedule 3.01(g)(xiv)(C), (1) the applicable survey shows the
               property in its present condition, (2) there have been no changes
               in the boundary lines of the property and (3) no other
               improvements have been constructed on or next to the property,
               and stating such other matters as the issuer of the Mortgage
               Policies may require to omit any exception in the Mortgage
               Policies relating to changes in the property since the date of
               the survey,

                         (D)  evidence of the insurance required by the terms of
               the Mortgages, and

                         (E)  evidence that all other action that the Agent may
               deem necessary or desirable in order to create valid first and
               subsisting Liens on the property described in the Mortgages has
               been taken.

               (xv) A guaranty agreement in substantially the form of Exhibit H
          (as amended, supplemented or otherwise modified from time to time in
          accordance with its terms, the "Parent Guaranty"), duly executed by
                                          ---------------
          the Parent Guarantor.

               (xvi) A guaranty agreement in substantially the form of Exhibit I
          (together with each other guaranty and guaranty supplement delivered
          pursuant to Section 5.01(n), as amended, supplemented or otherwise
          modified from time to time in accordance with its terms, the
          "Subsidiary Guaranty"), duly executed by the Subsidiary Guarantors.
           -------------------

               (xvii) Certified copies of each of the Related Documents, duly
          executed by the parties thereto and in form and substance satisfactory
          to the Agent, together with all agreements, instruments and other
          documents delivered in connection therewith.

               (xviii) [Intentionally Omitted.]

               (xix) A letter, in form and substance satisfactory to the Agent,
          from the Parent Guarantor to PriceWaterhouseCoopers, its independent
          certified public accountants, advising such accountants that the Agent
          (on its own account or at the request of the Lender Parties) has been
          authorized (upon an Event of Default
<PAGE>

                                                                              79

          or upon reasonable notice to the Borrower) to exercise all rights of
          the Parent Guarantor to require such accountants to disclose any and
          all financial statements and any other information of any kind that
          they may have with respect to the Parent Guarantor and its
          Subsidiaries and directing such accountants to comply with any
          reasonable request of the Agent for such information.

               (xx) A solvency certificate from the chief financial officer or
          treasurer of the Parent Guarantor, substantially in the form of
          Exhibit M-2, together with such other evidence reasonably requested by
          the Agent, attesting to the Solvency of the Parent Guarantor and its
          Subsidiaries after giving effect to the Acquisition, the Initial
          Extension of Credit and the other transactions contemplated hereby.

               (xxi) A favorable opinion of Winthrop, Stimson, Putnam & Roberts,
          counsel for the Borrower, the Parent Guarantor and each Subsidiary
          Guarantor, in substantially the form of Exhibit L-1 hereto and as to
          such other matters as the Agent may reasonably request.

               (xxii) A favorable opinion of the local counsel to the Borrower
          listed on Schedule 3.01(g)(xxii), in substantially the form of Exhibit
          L-2 hereto.

               (xxiii) A favorable opinion of Fasken, Campell & Godfrey,
          Canadian counsel for the Canadian Borrower, in substantially the form
          of Exhibit L-3 hereto and as to such other matters as the Agent may
          reasonably request.

               (xxiv) A reliance letter from Reed Smith Shaw & McClay, counsel
          to the seller under the Purchase Agreement, addressed to the Agent.

               (xxv) Landlord consents with respect to leased properties listed
          in Schedule 3.01(g)(xxv) in form and substance satisfactory to the
          Agent.

               (xxvi) A letter appointing the Borrower as agent for service of
          process for the Canadian Borrower.

               (xxvii) A counterpart of this Agreement duly executed by each
          party hereto.

               (xxviii) A certificate of the chief financial officer or the
          treasurer of the Parent Guarantor with respect to the pro forma
          Consolidated EBITDA of the Parent Guarantor and its Subsidiaries
          (after giving effect to the Acquisition) for the twelve month period
          ending June 30, 1999, demonstrating that such pro forma Consolidated
          EBITDA is not less than $60,300,000.
<PAGE>

                                                                              80

               (xxix) A certificate of the chief financial officer or the
          treasurer of the Parent Guarantor with respect to the ratio of Funded
          Debt of the Parent Guarantor and its Subsidiaries as of June 30, 1999,
          to the pro forma Consolidated EBITDA of the Parent Guarantor and its
          Subsidiaries (after giving effect to the Acquisition) for the twelve
          month period ending on such date, demonstrating that such ratio does
          not exceed 5.50 to 1.00.

               (xxx) Consolidated and consolidating financial projections for
          the Parent Guarantor and its Subsidiaries for the period of ten years
          following the Initial Extension of Credit, which projections shall
          reflect the Acquisition and the other transactions contemplated hereby
          and include the written assumptions upon which such projections are
          based, and be reasonably satisfactory in all respects to the Agent.

               (xxxi) A Consolidated pro forma balance sheet and a related
          statement of income of the Parent Guarantor and its Subsidiaries as of
          and for the four fiscal quarter period ending June 30, 1999, after
          giving effect to the Acquisition and the other transactions
          contemplated hereby, and an analysis of the adjustments necessary to
          reconcile the entries in such pro forma financial statements to those
          financial statements delivered for the Parent Guarantor and its
          Subsidiaries for such fiscal quarters pursuant to Section
          4.01(f)(i)(y).

               (xxxii) (A) (x) The Consolidated balance sheet of the Acquired
          Businesses as at March 31, 1997, March 31, 1998 and March 31, 1999,
          and the related Consolidated statements of income, stockholders'
          equity and cash flow of the Acquired Businesses for the Fiscal Year
          then ended, accompanied, as to the Consolidated financial statements,
          by an unqualified opinion of Schneider Downs & Co., Inc., independent
          public accountants, and (y) the Consolidated balance sheet of the
          Acquired Businesses as at June 30, 1999, and the related Consolidated
          statements of income, stockholders' equity and cash flow of the
          Acquired Businesses for the three months ended on such date, in the
          case of the statements referred to in this clause (A)(y) duly
          certified by the chief financial officer or treasurer of the Borrower,
          which in each case fairly present, subject, in the case of the
          statements referred to in clause (A)(y), to year-end audit
          adjustments, the Consolidated financial condition of the Acquired
          Businesses as at such dates and the Consolidated results of the
          operations of the Acquired Businesses for the periods ended on such
          dates, all in accordance with generally accepted accounting principles
          applied on a consistent basis, and (B) since March 31, 1999, there has
          occurred no Material Adverse Change with respect to the Acquired
          Businesses, taken as a whole.

          (h)  [Intentionally Omitted].
<PAGE>

                                                                              81

          (i)  The Borrower shall have received not less than $150,000,000 in
     gross cash proceeds from the issuance of the Subordinated Notes. The terms
     and conditions of the Subordinated Notes (including but not limited to
     terms and conditions relating to the interest rate, fees, amortization,
     maturity, subordination, covenants, events of default and remedies) and the
     provisions of the Subordinated Debt Documents shall be satisfactory in all
     material respects to the Agent. The Agent shall have received copies of the
     Subordinated Debt Documents, certified by an officer of the Borrower as
     true and correct.

          SECTION 3.02.  Conditions Precedent to Each Borrowing, Drawing and
                         ---------------------------------------------------
Issuance. The obligation of each Appropriate Lender to make an Advance or a
--------
Drawing (other than a Letter of Credit Advance made by the Issuing Bank or a
Working Capital Lender pursuant to Section 2.03(c) and other than a Swing Line
Advance made by a Working Capital Lender pursuant to Section 2.02(f)) on the
occasion of each Borrowing (including the Initial Extension of Credit), and the
obligation of the Issuing Bank to issue a Letter of Credit (including the
initial issuance), shall be subject to the further conditions precedent that on
the date of such Borrowing, Drawing or issuance (a) the following statements
shall be true (and each of the giving of the applicable Notice of Borrowing,
Notice of Drawing or Notice of Issuance and the acceptance by the Applicable
Borrower of the proceeds of such Borrowing, Drawing or Letter of Credit shall
constitute a representation and warranty by the Borrower that both on the date
of such notice and on the date of such Borrowing, Drawing or issuance such
statements are true):

          (i)  the representations and warranties contained in each Loan
     Document are correct on and as of such date, before and after giving effect
     to such Borrowing, Drawing or issuance and to the application of the
     proceeds therefrom, as though made on and as of such date other than any
     such representations or warranties that, by their terms, refer to a
     specific date other than the date of such Borrowing, Drawing or issuance,
     in which case as of such specific date; and

          (ii) no event has occurred and is continuing, or would result
     from such Borrowing, Drawing or issuance or from the application of the
     proceeds therefrom, that constitutes a Default;

and (b) the Agent shall have received such other approvals, opinions or
documents as the Agent may reasonably request.

          SECTION 3.03.  Determinations Under Section 3.01.  For purposes of
                         ---------------------------------
determining compliance with the conditions specified in Sections 3.01, each
Lender Party shall be deemed to have consented to, approved or accepted or to be
satisfied with each document or other matter required thereunder to be consented
to or approved by or acceptable or satisfactory to the Lender Parties unless an
officer of the Agent responsible for the transactions contemplated by the Loan
Documents shall have received notice from such Lender Party prior to the date of
the
<PAGE>

                                                                              82

Initial Extension of Credit specifying its objection thereto and if the initial
extension of credit consists of a Borrowing or Drawing, such Lender Party shall
not have made available to the Agent such Lender Party's ratable portion of such
Borrowing or Drawing.

                                  ARTICLE IV

                        REPRESENTATIONS AND WARRANTIES

          SECTION 4.01.  Representations and Warranties of the Borrower. The
                         ----------------------------------------------
Borrower represents and warrants as follows:

          (a)  Each Loan Party (i) is a corporation duly organized, validly
     existing and in good standing under the laws of the jurisdiction of its
     incorporation, (ii) is duly qualified and in good standing as a foreign
     corporation in each other jurisdiction in which it owns or leases property
     or in which the conduct of its business requires it to so qualify or be
     licensed except where the failure to so qualify or be licensed is not
     reasonably expected to have a Material Adverse Effect and (iii) has all
     requisite corporate power and authority (including, without limitation, all
     governmental licenses, permits and other approvals) to own or lease and
     operate its properties and to carry on its business as now conducted and as
     proposed to be conducted except to the extent the failure to do so is not
     reasonably expected to have a Material Adverse Effect.  All of the
     outstanding capital stock of the Borrower has been validly issued, is fully
     paid and non-assessable and, as of the date of this Agreement, is owned by
     the Parent Guarantor in the amounts and types specified in Schedule 4.01(a)
     free and clear of any Liens except those created or permitted under the
     Loan Documents.

          (b)  As of the date of this Agreement, set forth on Schedule 4.01(b)
     hereto is a complete and accurate list of all Subsidiaries of each Loan
     Party, showing (as to each such Subsidiary) the jurisdiction of its
     incorporation, the number of shares of each class of capital stock
     authorized, and the number outstanding, on the date hereof and the
     percentage of the outstanding shares of each such class owned (directly or
     indirectly) by such Loan Party and the number of shares covered by all
     outstanding options, warrants, rights of conversion or purchase and similar
     rights at the date hereof. All of the outstanding capital stock of all of
     such Subsidiaries has been validly issued, is fully paid and non-assessable
     and is owned by such Loan Party or one or more of its Subsidiaries free and
     clear of all Liens, except those created or permitted under the Loan
     Documents. Each such Subsidiary (i) is a corporation duly organized,
     validly existing and in good standing under the laws of the jurisdiction of
     its incorporation, (ii) is duly qualified and in good standing as a foreign
     corporation in each other jurisdiction in which it owns or leases property
     or in which the conduct of its business requires it to so qualify or be
     licensed except where the failure to so qualify or be licensed is not
     reasonably expected to
<PAGE>

                                                                              83

     have a Material Adverse Effect and (iii) has all requisite corporate power
     and authority (including, without limitation, all governmental licenses,
     permits and other approvals) to own or lease and operate its properties and
     to carry on its business as now conducted and as proposed to be conducted
     except to the extent the failure to do so is not reasonably expected to
     have a Material Adverse Effect.

          (c)  The execution, delivery and performance by each Loan Party of
     this Agreement, each other Loan Document and each Related Document to which
     it is or is to be a party, and the consummation of the transactions
     contemplated hereby and thereby, are within such Loan Party's corporate
     powers, have been duly authorized by all necessary corporate action, and do
     not (i) contravene such Loan Party's charter or bylaws, (ii) violate any
     law (including, without limitation, the Securities Exchange Act of 1934),
     rule, regulation (including, without limitation, Regulation X of the Board
     of Governors of the Federal Reserve System), order, writ, judgment,
     injunction, decree, determination or award applicable to such Loan Party,
     (iii) conflict with or result in the breach of, or constitute a default
     under, any contract, loan agreement, indenture, mortgage, deed of trust,
     lease or other instrument binding on or affecting any Loan Party, any of
     its Subsidiaries or any of their properties or (iv) except for the Liens
     created under the Loan Documents, result in or require the creation or
     imposition of any Lien upon or with respect to any of the properties of any
     Loan Party or any of its Subsidiaries.  No Loan Party or any of its
     Subsidiaries is in violation of any such law, rule, regulation, order,
     writ, judgment, injunction, decree, determination or award or in breach of
     any such contract, loan agreement, indenture, mortgage, deed of trust,
     lease or other instrument, the violation or breach of which is reasonably
     expected to have a Material Adverse Effect.

          (d)  No authorization or approval or other action by, and no notice to
     or filing with, any governmental authority or regulatory body or any other
     third party is required to be obtained by the Loan Parties for (i) the due
     execution, delivery, recordation, filing or performance by any Loan Party
     of this Agreement, any other Loan Document or any Related Document to which
     it is or is to be a party, or for the consummation of the Acquisition or
     the other transactions contemplated hereby or thereby, (ii) the grant by
     any Loan Party of the Liens granted by it pursuant to the Collateral
     Documents, (iii) the perfection or maintenance of the Liens created by the
     Collateral Documents (including the first priority nature thereof subject
     only to the Liens and security interests permitted in the Loan Documents)
     or (iv) the exercise by the Agent or any Lender Party of its rights under
     the Loan Documents or the remedies in respect of the Collateral pursuant to
     the Collateral Documents, except for the authorizations, approvals,
     actions, notices and filings listed on Schedule 4.01(d), all of which have
     been duly obtained, taken, given or made and are in full force and effect.
     All applicable waiting periods in connection with the Acquisition and the
     other transactions contemplated hereby and thereby have expired without any
     action having been taken by any competent authority restraining, preventing
     or imposing materially adverse conditions upon the Acquisition or the
     rights of the Loan
<PAGE>

                                                                              84

     Parties or their Subsidiaries freely to transfer or otherwise to dispose
     of, or to create any Lien on, any properties now owned or hereafter
     acquired by any of them.

          (e)  This Agreement has been, and each other Loan Document and each
     Related Document when delivered hereunder will have been, duly executed and
     delivered by each Loan Party thereto. This Agreement is, and each other
     Loan Document and each Related Document when delivered hereunder will be,
     the legal, valid and binding obligation of each Loan Party thereto,
     enforceable against such Loan Party in accordance with its terms except as
     may be limited by bankruptcy, insolvency, reorganization, moratorium or
     other laws relating to or limiting creditors' rights or by equitable
     principles generally.

          (f)  (i) (x) The Consolidated balance sheet of the Borrower and its
     Subsidiaries as at December 31, 1996, December 31, 1997 and December 31,
     1998, and the related Consolidated statements of income, stockholders'
     equity and cash flow of the Borrower and its Subsidiaries for the Fiscal
     Year then ended, accompanied, as to the Consolidated financial statements,
     by an unqualified opinion of PriceWaterhouseCoopers, independent public
     accountants, and (y) the Consolidated balance sheet of the Borrower and its
     Subsidiaries as at March 31, 1999, June 30, 1999, July 31, 1999 and August
     31, 1999, and the related Consolidated statements of income, stockholders'
     equity and cash flow of the Borrower and its Subsidiaries for the three
     months (or, in the case of the financial statements for July 31, 1999 and
     August 31, 1999, the month) ended on each such date, in the case of the
     statements referred to in this clause (i)(y) duly certified by the chief
     financial officer or treasurer of the Borrower, in each case copies of
     which have been furnished to each Lender Party, fairly present, subject, in
     the case of the statements referred to in clause (i)(y), to year-end audit
     adjustments, the Consolidated financial condition of each of the Borrower
     and its Subsidiaries as at such dates and the Consolidated results of the
     operations of the Borrower and its Subsidiaries for the periods ended on
     such dates, all in accordance with generally accepted accounting principles
     applied on a consistent basis, and (ii) there has occurred no Material
     Adverse Change with respect to the Borrower and its Subsidiaries, taken as
     a whole, since December 31, 1998.

          (g)  The annual Business Plans of the Borrower and its Subsidiaries
     delivered to the Lender Parties pursuant to Section 5.03(e) and the
     projections prepared by the Borrower and delivered to the Lender Parties
     pursuant to Section 3.01(g)(xxx) were prepared in good faith on the basis
     of the assumptions stated therein, which assumptions were fair in the light
     of conditions existing at the time of delivery of such annual Business
     Plans and projections, and represented, at the time of delivery, the
     Borrower's best estimate of its future financial performance (it being
     recognized by the Lender Parties that such annual Business Plans and
     projections as to future events are not to be viewed as facts and that
     actual results during the period covered may differ from the plans).
<PAGE>

                                                                              85

          (h)  No information, exhibit or report (excluding any Business Plan or
     financial projections), taken as a whole, furnished on behalf of any Loan
     Party to the Agent or any Lender Party in connection with the negotiation
     of the Loan Documents or pursuant to the terms of the Loan Documents
     contained any untrue statement of a material fact or omitted to state a
     material fact necessary to make the statements made therein, in light of
     the circumstances in which they were made, not misleading as of its date.

          (i)  There is no action, suit, investigation, litigation or
     proceeding affecting any Loan Party or any of its Subsidiaries, including
     any Environmental Action, pending or threatened before any court,
     governmental agency or arbitrator that (i) individually or in the
     aggregate, is reasonably expected to have a Material Adverse Effect or (ii)
     purports to affect the legality, validity or enforceability of the
     Acquisition, this Agreement, any other Loan Document or any Related
     Document or the consummation of the transactions contemplated hereby. There
     is no condemnation or similar proceeding pending or threatened affecting
     any part of the property subject to a Mortgage that is reasonably expected
     to have a Material Adverse Effect.

          (j)  No proceeds of any Advance, any Drawing or drawings under any
     Letter of Credit will be used to acquire any equity security of a class
     that is registered pursuant to Section 12 of the Securities Exchange Act of
     1934.

          (k)  The Borrower is not engaged in the business of extending credit
     for the purpose of purchasing or carrying Margin Stock, and following
     application of the proceeds of each Advance, Drawing or drawing under each
     Letter of Credit, not more than 25% of the value of the assets (either of
     the Borrower only or of the Borrower and its Subsidiaries on a Consolidated
     basis) subject to the provisions of Section 5.02(a) or 5.02(e) or subject
     to any restriction contained in any agreement or instrument between the
     Borrower and any Lender Party or any Affiliate of any Lender Party relating
     to Debt within the scope of Section 6.01(e) will be Margin Stock. For
     purposes of this Section 4.01(k), "assets" of the Borrower or any of its
     Subsidiaries includes, without limitation, treasury stock of the Borrower
     that has not been retired.

          (l)  Set forth on Schedule 4.01(l) hereto is a complete and accurate
     list, as of the date hereof, of all Plans, Multiemployer Plans and Welfare
     Plans.

          (m)  No ERISA Event has occurred or is reasonably expected to occur
     with respect to any Plan which is reasonably expected to have a Material
     Adverse Effect.

          (n)  As of the last annual actuarial valuation date, the funded
     current liability percentage, as defined in Section 302(d)(8) of ERISA, of
     each Plan exceeds 90% except
<PAGE>

                                                                              86

     in any case where the failure to exceed 90% is not reasonably expected to
     have a Material Adverse Effect, and there has been no change in the funding
     status of any such Plan since such date which is reasonably expected to
     have a Material Adverse Effect.

          (o)  Schedule B (Actuarial Information) to the most recent annual
     report (Form 5500 Series) for each Plan, copies of which have been filed
     with the Internal Revenue Service and furnished to the Lender Parties, is
     complete and accurate and fairly presents the funding status of such Plan,
     and since the date of such Schedule B there has been no change in such
     funding status which is reasonably expected to have a Material Adverse
     Effect.

          (p)  Neither any Loan Party nor any ERISA Affiliate has incurred or is
     reasonably expected to incur any Withdrawal Liability to any Multiemployer
     Plan which is reasonably expected to have a Material Adverse Effect.

          (q)  Neither any Loan Party nor any ERISA Affiliate has been notified
     by the sponsor of a Multiemployer Plan that such Multiemployer Plan is in
     reorganization or has been terminated, within the meaning of Title IV of
     ERISA, and no such Multiemployer Plan is reasonably expected to be in
     reorganization or to be terminated, within the meaning of Title IV of ERISA
     which, in any such case, is reasonably expected to result in a Material
     Adverse Effect.

          (r)  Except as set forth in the financial statements referred to in
     this Section 4.01 or in Section 5.03, the Loan Parties and their respective
     Subsidiaries have no material liability with respect to "expected post
     retirement benefit obligations" within the meaning of Statement of
     Financial Accounting Standards No. 106.

          (s)  Neither the business nor the properties of any Loan Party or any
     of its Subsidiaries are affected by any fire, explosion, accident, strike,
     lockout or other labor dispute, drought, storm, hail, earthquake, embargo,
     act of God or of the public enemy or other casualty (whether or not covered
     by insurance) that could reasonably be expected to have a Material Adverse
     Effect.

          (t)  Except as set forth on Schedule 4.01(t), (i) the operations and
     properties of each Loan Party and each of its Subsidiaries comply in all
     material respects with all applicable Environmental Laws and Environmental
     Permits, all past claims of non-compliance with such Environmental Laws and
     Environmental Permits have been resolved without material ongoing
     obligations or costs, and (ii) no circumstances exist that are reasonably
     expected to (A) form the basis of an Environmental Action against any Loan
     Party or any of its Subsidiaries or any of its properties that are
     reasonably expected to have a Material Adverse Effect or (B) cause any such
     property to be subject
<PAGE>

                                                                              87

     to any material restrictions on ownership, occupancy, use or
     transferability under any Environmental Law.

          (u)  Except as set forth on Schedule 4.01(u) and in each case to the
     extent not reasonably expected to have a Material Adverse Effect, (i) none
     of the properties currently or formerly owned or operated by any Loan Party
     or any of its Subsidiaries is listed or proposed for listing on the NPL or
     on the CERCLIS or any analogous foreign, state or local list or is adjacent
     to any such property; (ii) there are no underground or aboveground storage
     tanks or any surface impoundments, septic tanks, pits, sumps or lagoons in
     which Hazardous Materials are being or have been treated, stored or
     disposed on any material property currently owned or operated by any Loan
     Party or any of its Subsidiaries; (iii) there is no asbestos or asbestos-
     containing material on any material property currently owned or operated by
     any Loan Party or any of its Subsidiaries; and (iv) to the best knowledge
     of any Loan Party, Hazardous Materials have not been released, discharged
     or disposed of on any property currently or formerly owned or operated by
     any Loan Party or any of its Subsidiaries.

          (v)  Neither any Loan Party nor any of its Subsidiaries is
     undertaking, and has not completed, either individually or together with
     other potentially responsible parties, any investigation or assessment or
     remedial or response action relating to any actual or threatened release,
     discharge or disposal of Hazardous Materials at any site, location or
     operation, either voluntarily or pursuant to the order of any governmental
     or regulatory authority or the requirements of any Environmental Law that
     is reasonably expected to have a Material Adverse Effect.

          (w)  Neither any Loan Party nor any of its Subsidiaries is a party
     to any indenture, loan or credit agreement or any lease or other agreement
     or instrument or subject to any charter or corporate restriction that is
     reasonably expected to have a Material Adverse Effect.

          (x)  The Collateral Documents create a valid and perfected security
     interest in the Collateral (subject in priority only to the Liens and
     security interests permitted under the Loan Documents) securing the payment
     of the Secured Obligations, and all filings and other actions necessary or
     prudent to perfect and preserve such security interest have been duly
     taken. The Loan Parties are the legal and beneficial owners of the
     Collateral free and clear of any Lien, except for the liens and security
     interests created or permitted under the Loan Documents.

          (y)  Each Loan Party and each of its Subsidiaries has filed or has
     caused to be filed all material tax returns (Federal, state, local and
     foreign) which, to the knowledge of the Borrower, are required to be filed
     and has paid all taxes shown thereon to be due, together with applicable
     interest and penalties (other than any such taxes, interest and
<PAGE>

                                                                              88

     penalties the amount or validity of which is currently being contested in
     good faith by appropriate proceedings and with respect to which reserves in
     conformity with GAAP have been provided on the books of the applicable Loan
     Party).

          (z)  Set forth on Schedule 4.01(z) hereto is a complete and accurate
     list, as of the date hereof, of each taxable year of each Loan Party and
     each of its Subsidiaries for which Federal income tax returns have been
     filed and for which the expiration of the applicable statute of limitations
     for assessment or collection has not occurred by reason of extension or
     otherwise (an "Open Year").
                    ---------

          (aa) Except as set forth on Schedule 4.01(aa), there is no unpaid
     amount, as of the date hereof, of adjustments to the Federal income tax
     liability of any Loan Party or any of its Subsidiaries proposed by the
     Internal Revenue Service with respect to Open Years and no issues have been
     raised by the Internal Revenue Service in respect of Open Years that, in
     the aggregate, are reasonably expected to have a Material Adverse Effect.

          (bb) Except as set forth on Schedule 4.01(bb), there is no material
     unpaid amount, as of the date hereof, of adjustments to the state, local
     and foreign tax liability of any Loan Party or any of its Subsidiaries
     proposed by any state, local and foreign taxing authorities (other than
     amounts arising from adjustments to Federal income tax returns, if any)
     with respect to Open Years. No issues have been raised by such taxing
     authorities that, in the aggregate, are reasonably expected to have a
     Material Adverse Effect.

          (cc) Neither any Loan Party nor any of its Subsidiaries is an
     "investment company", or an "affiliated person" of, or "promoter" or
     "principal underwriter" for, an "investment company", as such terms are
     defined in the Investment Company Act of 1940, as amended. Neither the
     making of any Advances, nor any Drawing, nor the issuance of any Letters of
     Credit, nor the application of the proceeds or repayment thereof by the
     Applicable Borrower, nor the consummation of the other transactions
     contemplated hereby, will violate any provision of such Act or any rule,
     regulation or order of the Securities and Exchange Commission thereunder.

          (dd) Each Loan Party is, individually and together with its
     Subsidiaries, Solvent.

          (ee) Set forth on Schedule 4.01(ee) hereto is a complete and accurate
     list of all Existing Debt (other than Surviving Debt), showing as of the
     date hereof the principal amount outstanding thereunder.

          (ff) Set forth on Schedule 3.01(f) hereto is a complete and accurate
     list of all Surviving Debt as of the date hereof, showing the principal
     amount outstanding thereunder, the maturity date thereof and the
     amortization schedule therefore.
<PAGE>

                                                                              89

          (gg) Set forth on Schedule 4.01(gg) hereto is a complete and accurate
     list of all material real property owned, as of the date hereof, by any
     Loan Party or any of its Subsidiaries, showing as of the date hereof the
     county or other relevant jurisdiction and the state thereof. Except to the
     extent the failure to do so is not reasonably expected to have a Material
     Adverse Effect, as of the date hereof, each Loan Party or such Subsidiary
     has good, marketable and insurable title to such real property, free and
     clear of all Liens, other than Liens created or permitted by the Loan
     Documents.

          (hh) Set forth on Schedule 4.01(hh) hereto is a complete and accurate
     list of all material leases of real property (the "Material Leases") under
                                                        ---------------
     which any Loan Party or any of its Subsidiaries is the lessee, as of the
     date hereof, showing as of the date hereof the county or other relevant
     jurisdiction, state, lessor and expiration date thereof. Except to the
     extent the failure to do so is not reasonably expected to have a Material
     Adverse Effect, as of the date hereof, each Material Lease is the legal,
     valid and binding obligation of the lessor thereof, enforceable in
     accordance with its terms and the execution and delivery by the Loan
     Parties of the Mortgages does not terminate, or constitute a default under,
     any Material Lease and does not give the lessor under any Material Lease
     the right to terminate such Material Lease or declare a default thereunder.

          (ii) Set forth on Schedule 4.01(ii) hereto is a complete and accurate
     list of all Investments held as of the date hereof by any Loan Party or any
     of its Subsidiaries showing the amount, obligor or issuer and maturity, if
     any, thereof.

          (jj) As of the date of this Agreement, set forth on Schedule 4.01(jj)
     hereto is a complete and accurate list of all material patents, trademarks,
     trade names, service marks and copyrights, and all material applications
     therefor and material licenses thereof, of each Loan Party or any of its
     Subsidiaries showing the jurisdiction in which registered, the registration
     number, the date of registration and the expiration date.

          (kk) The Parent Guarantor and each of its Subsidiaries are Year 2000
     Compliant, except where any failure to be Year 2000 Compliant is not,
     individually or in the aggregate, reasonably expected to have a Material
     Adverse Effect.
<PAGE>

                                                                              90

                                   ARTICLE V

                          COVENANTS OF THE BORROWER,
                           OF THE CANADIAN BORROWER
                          AND OF THE PARENT GUARANTOR

          SECTION 5.01.  Affirmative Covenants.  So long as any Advance shall
                         ---------------------
remain unpaid, any Letter of Credit or Bankers' Acceptance shall be outstanding
or any Lender Party shall have any Commitment hereunder, the Parent Guarantor
will:

          (a)  Compliance with Laws, Etc.  Comply, and cause each of its
               -------------------------
     Subsidiaries to comply, in all material respects, with all applicable laws,
     rules, regulations and orders, such compliance to include, without
     limitation, compliance with ERISA.

          (b)  Payment of Taxes, Etc.  Pay and discharge, and cause each of its
               ---------------------
     Subsidiaries to pay and discharge, before the same shall become delinquent,
     (i) all material amounts of taxes, assessments and governmental charges or
     levies imposed upon it or upon its property and (ii) all lawful claims
     that, if unpaid, could reasonably be expected by law to become a Lien upon
     its property; provided, however, that neither the Parent Guarantor nor any
                   --------  -------
     of its Subsidiaries shall be required to pay or discharge any such tax,
     assessment, charge or claim (x) that is being contested in good faith and
     by proper proceedings and as to which appropriate reserves are being
     maintained or (y) in respect of which any Lien resulting therefrom attaches
     to its property and becomes enforceable against its other creditors to the
     extent that the aggregate amount of all such taxes, assessments, charges
     and claims does not exceed $300,000.

          (c)  Compliance with Environmental Laws.  Comply, and cause each of
               ----------------------------------
     its Subsidiaries and all lessees and other Persons operating or occupying
     its properties to comply, in all material respects, with all applicable
     Environmental Laws and Environmental Permits; obtain and renew and cause
     each of its Subsidiaries to obtain and renew all material Environmental
     Permits necessary for its operations and properties; and conduct, and cause
     each of its Subsidiaries to conduct, any investigation, study, sampling and
     testing, and undertake any cleanup, removal, remedial or other action
     necessary to remove and clean up all Hazardous Materials from any of its
     properties, in accordance with the requirements of all Environmental Laws,
     unless the failure to so comply with the foregoing is not reasonably
     expected to have a Material Adverse Effect; provided, however, that neither
                                                 --------  -------
     the Parent Guarantor nor any of its Subsidiaries shall be required to
     undertake any such cleanup, removal, remedial or other action to the extent
     that its obligation to do so is being contested in good faith and by proper
     proceedings and appropriate reserves are being maintained with respect to
     such circumstances.

          (d)  Maintenance of Insurance.  Maintain, and cause each of its
               ------------------------
     Subsidiaries to maintain, insurance with responsible and reputable
     insurance companies or associations
<PAGE>

                                                                              91

     in such amounts and covering such risks as is usually carried by companies
     engaged in similar businesses and owning similar properties in the same
     general areas in which the Parent Guarantor or such Subsidiary operates.
     Each such insurance policy shall be on terms as provided for in Section
     11(a) of the Security Agreement.

          (e)  Preservation of Corporate Existence, Etc.  Preserve and maintain,
               ----------------------------------------
     and cause each of its Subsidiaries to preserve and maintain, its corporate
     existence, rights (charter and statutory), and all material permits,
     licenses, approvals, privileges and franchises necessary or desirable in
     the normal conduct of its business; provided, however, that any of the
                                         --------  -------
     Parent Guarantor's Subsidiaries may consummate any merger or consolidation
     permitted under Section 5.02(d).

          (f)  Visitation Rights.  Upon 5 Business Days' notice to the Parent
               -----------------
     Guarantor, permit the Agent or any of the Lender Parties or any agents or
     representatives thereof, to examine and make copies of and abstracts from
     the records and books of account of, and visit the properties of, the
     Parent Guarantor and any of its Subsidiaries, and to discuss the affairs,
     finances and accounts of the Parent Guarantor and any of its Subsidiaries
     with any of their officers or directors and, as to the Agent only and with
     reasonable notice to the Parent Guarantor, with their independent certified
     public accountants.

          (g)  Preparation of Environmental Reports.  At the request of the
               ------------------------------------
     Agent at the following times: (i) upon and during the continuance of an
     Event of Default and (ii) upon the acquisition or sale of real property by
     any Loan Party or any of its Subsidiaries, provide to the Agent within 60
     days after such request, at the expense of the Borrower, a Phase I
     environmental site assessment report for properties to be acquired and
     described in such request, prepared by an environmental consulting firm
     reasonably acceptable to the Agent (and, if based upon the recommendation
     of such environmental consulting firm upon and during the continuance of an
     Event of Default, a Phase II environmental site assessment report)
     indicating the presence or absence of Hazardous Materials and the estimated
     cost of any compliance, removal or remedial action in connection with any
     Hazardous Materials on such properties; without limiting the generality of
     the foregoing, if the Agent determines at any time upon and during the
     continuance of an Event of Default that a material risk exists that any
     such report will not be provided within the time referred to above, the
     Agent may retain an environmental consulting firm to prepare such report at
     the expense of the Borrower, and the Borrower hereby grants and agrees to
     cause any Subsidiary that owns any property described in such request to
     grant at the time of such request, to the Agent, the Lender Parties, such
     firm and any agents or representatives thereof an irrevocable non-exclusive
     license, subject to the rights of tenants, to enter onto their respective
     properties to undertake such an assessment.

          (h)  Keeping of Books.  Keep, and cause each of its Subsidiaries to
               ----------------
     keep, proper books of record and account, in which entries which are full
     and correct in all
<PAGE>

                                                                              92

     material respects shall be made of all financial transactions and the
     assets and business of the Parent Guarantor and each such Subsidiary in
     accordance with generally accepted accounting principles in the United
     States.

          (i)  Maintenance of Properties, Etc.  Maintain and preserve, and cause
               ------------------------------
     each of its Subsidiaries to maintain and preserve, all of its properties
     that are reasonably required in the conduct of its business in good working
     order and condition, ordinary wear, tear and depletion excepted.

          (j)  Compliance with Terms of Leaseholds.  Cause each of its
               -----------------------------------
     Subsidiaries to make all payments and otherwise perform all obligations in
     respect of all leases of real property to which any such Subsidiary is a
     party, keep such leases in full force and effect and not allow such leases
     to lapse or be terminated or any rights to renew such leases to be
     forfeited or canceled, notify the Agent of any material default by any
     party with respect to such leases and cooperate with the Agent in all
     respects to cure any such default, and cause each such Subsidiary to do so,
     unless the failure to so comply with the foregoing is not reasonably
     expected to have a Material Adverse Effect.

          (k)  Performance of Related Documents.  Unless the failure to so
               --------------------------------
     comply (other than the failure to comply with the Purchase Agreement) could
     not reasonably be expected to have a Material Adverse Effect, perform and
     observe, and cause each of its Subsidiaries to perform and observe, all of
     the terms and provisions of each Related Document to be performed or
     observed by it, maintain each such Related Document in full force and
     effect, enforce such Related Document in accordance with its terms, and
     upon and during the continuance of an Event of Default, (i) take all such
     action to such end as may be from time to time requested by the Agent and
     (ii) upon request of the Agent, make to each other party to each such
     Related Document such demands and requests for information and reports or
     for action as it is entitled to make under such Related Document.

          (l)  Transactions with Affiliates.  (i) Conduct, and cause each of its
               ----------------------------
     Subsidiaries to conduct, all transactions otherwise permitted under the
     Loan Documents with any of their Affiliates on terms that are no less
     favorable to the Parent Guarantor or such Subsidiary than it would obtain
     in a comparable arm's-length transaction with a Person not an Affiliate;
     provided, however, that the Borrower may make payments to D. George Harris
     --------  -------
     & Associates, LLC or any of its designees in an amount not to exceed one
     percent (1%) of the consideration paid in connection with (x) any Permitted
     Acquisition or (y) the Acquisition; and provided further that transactions
                                             -------- -------
     otherwise permitted under the Loan Documents among the Parent Guarantor and
     its Subsidiaries and those transactions contemplated by the Tax Sharing
     Agreement, the Harris Management Agreement and the Investments contemplated
     by Section 5.02(f)(x) shall not be subject to the requirements of this
     Section 5.01(l). Without in any way limiting
<PAGE>

                                                                              93

     the generality of the foregoing, any consents or waivers of or amendments,
     supplements or modifications to the Harris Management Agreement shall
     require the approval of the Compensation Committee constituted by the Board
     of Directors of USS Holdings, Inc.

          (ii) The foregoing paragraph (i) shall not prohibit, to the extent
     otherwise permitted under this Agreement, (A) any Restricted Payment
     permitted to be paid pursuant to Section 5.02(g), (B) any issuance of
     securities, or other payments, awards or grants in cash, securities or
     otherwise pursuant to, or the funding of, employment arrangements, stock
     options and stock ownership plans approved by the board of directors of the
     Borrower, (C) the grant of stock options or similar rights  to employees
     and directors of the Borrower pursuant to plans approved by the board of
     directors of the Borrower, (D) loans or advances to employees in the
     ordinary course of business in accordance with past practices of the
     Borrower or any of its Subsidiaries and (E) the payment of reasonable fees
     to directors of the Parent Guarantor and its Subsidiaries who are not
     employees of the Parent Guarantor or its Subsidiaries.

          (m)  Covenant to Give Security.  Upon the request of the Agent (i)
               -------------------------
     following the occurrence and during the continuance of an Event of Default
     with respect to any parcel of real property in any one county with a fair
     market value that is equal to or greater than $125,000 but less than
     $250,000 or (ii) upon the acquisition by the Parent Guarantor or any of its
     Subsidiaries of real property in any one county with an aggregate fair
     market value, at the time of any such acquisition, equal to or greater than
     $250,000, take all or any of the following actions, in all cases at the
     expense of the Borrower, (A) within 10 days after such request, furnish to
     the Agent a description of the real and personal property of the Parent
     Guarantor and its Subsidiaries which are not subject to the Collateral
     Documents and which meet the criteria of clause (i) or (ii) above, as the
     case may be, in detail reasonably satisfactory to the Agent, (B) within 15
     days after receipt of such documents, duly execute and deliver mortgages,
     pledges, assignments and other security agreements, as specified by and in
     form and substance reasonably satisfactory to the Agent, securing payment
     of all the Obligations of the Loan Parties under the Loan Documents and
     constituting Liens on all such properties, (C) within 30 days after receipt
     of such documents, take whatever action (including, without limitation, the
     recording of mortgages, the filing of Uniform Commercial Code financing
     statements, the giving of notices and the endorsement of notices on title
     documents) that may be reasonably necessary or advisable in the opinion of
     the Agent to vest in the Agent (or in any representative of the Agent
     designated by it) valid and subsisting Liens on the properties purported to
     be subject to the security agreements delivered pursuant to this Section
     5.01(m), enforceable against all third parties in accordance with their
     terms, (D) within 60 days after receipt of such documents, deliver to the
     Agent a signed copy of a favorable opinion, addressed to the Agent, of
     counsel for the Borrower reasonably acceptable to the Agent, as to such
     security agreements creating legal, valid and subsisting Liens enforceable
     in accordance with their terms and as to such other matters
<PAGE>

                                                                              94

     as the Agent may reasonably request, (E) as promptly as is practicable
     after such request in respect of property subject to clause (ii) above,
     deliver to the Agent surveys meeting the criteria specified in Section
     3.01(g)(xiv)(B) and Mortgage Policies as to each parcel of real property
     subject to such request, (F) as soon as reasonably practicable, and in no
     event later than 9 months after the Initial Extension of Credit, cause the
     provisions of clauses (A), (B), (C), (D) and (E) above to be satisfied with
     respect to each property listed on Schedule 5.01(m), and (G) at any time
     and from time to time, promptly execute and deliver any and all further
     instruments and documents and take all such other action as the Agent may
     deem reasonably desirable in obtaining the full benefits of, or in
     preserving the Liens of, such security agreements.

          (n)  Covenant to Guarantee and Secure Obligations.  Unless otherwise
               --------------------------------------------
     agreed to by the Agent, upon the formation or acquisition of any new direct
     or indirect wholly owned Domestic Subsidiary of the Borrower, within 10
     days after such formation or acquisition, (i) cause each such Domestic
     Subsidiary to duly execute and deliver to the Agent a guaranty or guaranty
     supplement, in form and substance satisfactory to the Agent, guaranteeing
     the other Loan Parties' obligations under the Loan Documents, and each
     applicable Collateral Document in the manner provided therein, (ii)
     promptly take such actions to create and perfect Liens on such Domestic
     Subsidiary's assets to secure the Obligations as the Agent shall reasonably
     request and (iii) if any capital stock or other ownership or profit
     interest, warrants, rights, options or Debt of such Subsidiary are owned by
     any Loan Party (other than the Canadian Borrower), cause such capital stock
     or other ownership or profit interest, warrants, rights, options and
     promissory notes evidencing such Debt to be pledged pursuant to the
     Security Agreement.

          (o)  Interest Rate Hedging.  Cause the Borrower to enter into prior to
               ---------------------
     March 31, 2000, and thereafter to maintain for successive periods of not
     less than three years, Bank Hedge Agreements on such terms as shall be
     reasonably satisfactory to the Agent, the effect of which is to fix or
     limit the interest cost to the Borrower, during the three-year period
     immediately following the date on which the Borrower enters into the
     applicable Bank Hedge Agreement, with respect to at least 60% of the Term
     Advances outstanding during such three-year period.

          (p)  Year 2000 Compliance.  Be, and cause each of its Subsidiaries to
               --------------------
     be, Year 2000 Compliant at all times, except where failure to do so is not
     reasonably expected to have a Material Adverse Effect.

          SECTION 5.02.  Negative Covenants.  So long as any Advance shall
                         ------------------
remain unpaid, any Letter of Credit or Bankers' Acceptance shall be outstanding
or any Lender Party shall have any Commitment hereunder, the Parent Guarantor
will not, at any time:
<PAGE>

                                                                              95

          (a)  Liens, Etc.  Create, incur, assume or suffer to exist, or permit
               ----------
     any of its Subsidiaries to create, incur, assume or suffer to exist, any
     Lien of any character on or with respect to any of its properties
     (including, without limitation, accounts) whether now owned or hereafter
     acquired, or sign or file or suffer to exist, or permit any of its
     Subsidiaries to sign or file or suffer to exist, under the Uniform
     Commercial Code of any jurisdiction, a financing statement that names the
     Parent Guarantor or any of its Subsidiaries as debtor, or sign or suffer to
     exist, or permit any of its Subsidiaries to sign or suffer to exist, any
     security agreement authorizing any secured party thereunder to file such
     financing statement, or assign, or permit any of its Subsidiaries to
     assign, any accounts or other right to receive income, excluding, however,
                                                            ---------  -------
     from the operation of the foregoing restrictions the following:

               (A)  in the case of the Borrower and its Subsidiaries:

                    (i)   Liens created under the Loan Documents;

                    (ii)  Permitted Liens;

                    (iii) Liens existing on the date hereof and described on
               Schedule 5.02(a)(iii) hereto or in the Mortgage Policies;

                    (iv)  Liens arising in connection with Capitalized Leases
               permitted under Section 5.02(b)(v), provided that no such Lien
                                                   --------
               shall extend to or cover any Collateral or assets other than the
               assets subject to such Capitalized Leases;

                    (v)   purchase money Liens upon or in real property or
               equipment acquired or held by the Borrower or any of its
               Subsidiaries in the ordinary course of business to secure the
               purchase price of such property or equipment or to secure Debt
               incurred solely for the purpose of financing the acquisition of
               or construction on or improvement of any such property or
               equipment to be subject to such Liens, or Liens existing on any
               such property or equipment at the time of acquisition (other than
               any such Liens created in contemplation of such acquisition that
               do not secure the purchase price), or extensions, renewals or
               replacements of any of the foregoing for the same or a lesser
               amount; provided, however, that no such Lien shall extend to or
                       --------  -------
               cover any property other than the property or equipment being
               acquired or constructed and any improvements thereon, and no such
               extension, renewal or replacement shall extend to or cover any
               property not theretofore subject to the Lien being extended,
               renewed or replaced; and provided further that the aggregate
                                        -------- -------
               principal amount of the Debt secured by Liens permitted by this
               clause (v) shall not exceed the
<PAGE>

                                                                              96

               amount permitted under Section 5.02(b)(B)(i) at any time
               outstanding and that any such Debt shall not otherwise be
               prohibited by the terms of the Loan Documents;

                    (vi)   the filing of financing statements solely as a
               precautionary measure in connection with operating leases
               permitted under Section 5.02(c);

                    (vii)  the replacement, extension or renewal of any Lien
               permitted by clause (iii) above upon or in the same property
               theretofore subject thereto or the replacement, extension or
               renewal (without increase in the amount or change in any direct
               or contingent obligor) of the Debt secured thereby;

                    (viii) Liens for unpaid royalties not then due and payable
               which Liens, in the aggregate, are not substantial in amount and
               do not, in any case, materially detract from the value of the
               property subject thereto or materially interfere with the
               ordinary conduct of business of the Borrower and its
               Subsidiaries;

                    (ix)   Liens in respect of judgments or decrees not
               constituting an Event of Default under Section 6.01(g); and

                    (x)    Permitted Liens as to which enforcement, execution,
               levy or foreclosure proceedings shall have been commenced in an
               amount not to exceed $500,000 in the aggregate; and

               (B)  in the case of the Parent Guarantor:

                    (i)    Liens created under the Parent Guarantor Security
               Agreement;

                    (ii)   Permitted Liens; and

                    (iii)  Liens in respect of judgments or decrees not
               constituting an Event of Default under Section 6.01(g).

          (b)  Debt.  Create, incur, assume or suffer to exist, or permit any of
               ----
     its Subsidiaries to create, incur, assume or suffer to exist, any Debt
     other than:

                    (i)    Debt in respect of Bank Hedge Agreements entered into
               pursuant to Section 5.01(o);
<PAGE>

                                                                              97

                    (ii)   Debt in respect of Natural Gas Hedge Agreements
               designed to hedge against fluctuations in natural gas prices,
               incurred in the ordinary course of business and consistent with
               prudent business practice in an aggregate notional amount not to
               exceed at any one time 60% of the sum of (x) the aggregate amount
               of the natural gas requirements of the Loan Parties the preceding
               12 months, and (y) the projected natural gas requirements of the
               Loan Parties for the next six months;

                    (iii)  Debt in respect of surety bonds fully supported by
               Letters of Credit;

                    (iv)   the Subordinated Debt;

                    (v)    Capitalized Leases, together with Debt secured by
               Liens permitted by Section 5.02(a)(v), the principal amount of
               which does not, in the aggregate, exceed $10,000,000 at any one
               time outstanding;

                    (vi)   Debt described on Schedule 3.01(f);

                    (vii)  Debt under the Loan Documents;

                    (viii) indorsement of negotiable instruments for deposit or
               collection or similar transactions in the ordinary course of
               business;

                    (ix)   Debt in respect of trade payables in an amount not to
               exceed $1,000,000 in the aggregate;

                    (x)    Debt in respect of (A) Investments permitted under
               Sections 5.02(f)(i), (ii), (vi), (xii), (xiv), (xv), (xvi) and
               (xvii) hereof and (B) Restricted Payments permitted under Section
               5.02(g) hereof; provided that Debt in respect of Investments
                               --------
               permitted under Section 5.02(f)(xii) shall be permitted under
               this Agreement only to the extent that the incurrence of such
               Debt is permitted under the Subordinated Debt Documents, and
               provided further that the aggregate principal amount of Debt in
               -------- -------
               respect of Investments permitted under Section 5.02(f)(xvi) shall
               not exceed $15,000,000 in the aggregate at any one time
               outstanding;

                    (xi)   Debt of the type described in clauses (i) or (j) of
               the definition of "Debt" relating to the Debt of any Loan Party
               that is permitted under Section 5.02(b) (other than the
               Subordinated Debt);
<PAGE>

                                                                              98

                    (xii)  unsecured Debt not to exceed $750,000 in the
               aggregate at any one time outstanding; and

                    (xiii) the Nicks Silica Company Note.

          (c)  Lease Obligations.  Permit any of its Subsidiaries to create,
               -----------------
     incur, assume or suffer to exist, any obligations as lessee for the rental
     or hire of real or personal property in connection with any operating
     leases or Capitalized Lease obligations having an original term of one year
     or more that would cause the annual rental obligations of the Borrower and
     its Subsidiaries, on a Consolidated basis, to exceed $5,000,000 payable in
     any period of 12 consecutive months.

          (d)  Mergers, Etc.  Merge into or consolidate with any Person or
               ------------
     permit any Person to merge into it, or permit any of its Subsidiaries to do
     so, except that any Subsidiary of the Borrower may merge into or
     consolidate with (i) the Borrower in a transaction in which the Borrower is
     the surviving corporation or (ii) any other Subsidiary of the Borrower or
     any Person the capital stock of which is acquired in a Permitted
     Acquisition in a transaction in which the surviving corporation is a wholly
     owned (and, to the extent that a Subsidiary party to such merger or
     consolidation is a Domestic Subsidiary, Domestic) Subsidiary of the
     Borrower.

          (e)  Sales, Etc., of Assets.  Sell, lease, transfer or otherwise
               ----------------------
     dispose of, or permit any of its Subsidiaries to sell, lease, transfer or
     otherwise dispose of, any assets, or grant any option or other right to
     purchase, lease or otherwise acquire any assets, except:

               (i)   sales of Inventory (including, without limitation, sales of
          obsolete Inventory) in the ordinary course of its business;

               (ii)  in a transaction authorized by subsection (d) of this
          Section;

               (iii) dispositions of used equipment for fair value in the
          ordinary course of business, provided that the proceeds thereof are
                                       --------
          used in the ordinary course of business to purchase equipment to be
          used in the ordinary course of business;

               (iv)  dispositions of worn out or obsolete tools or equipment no
          longer used or, in the Borrower's or the applicable Subsidiary of the
          Borrower's good faith judgment, useful in the ordinary course of
          business of the Borrower and its Subsidiaries;

               (v)   upon notice to the Agent, the Borrower and its Subsidiaries
          may, in the ordinary course of business, sell, lease, transfer or
          otherwise dispose of up to
<PAGE>

                                                                              99

          1,000 acres of owned real property in any period of 24 consecutive
          months; provided, however, notwithstanding anything provided for
                  --------  -------
          in the previous sentence, the Borrower may, in the ordinary course of
          business, upon notice to the Agent, sell, lease, transfer or otherwise
          dispose of the real property listed on Schedule 5.02(c)(v) hereof;
          provided that no sale, lease, transfer or disposition made pursuant to
          --------
          this subsection (v) shall, individually or in the aggregate,
          materially interfere with the business of the Borrower and its
          Subsidiaries;

               (vi)    dispositions of any asset by any Subsidiary of the
          Borrower to the Borrower or any wholly-owned Domestic Subsidiary;

               (vii)   dispositions (other than sales) in the ordinary course of
          business of property that do not, in the aggregate, materially
          interfere with the business of the Borrower and its Subsidiaries;

               (viii)  sales or other dispositions of capital stock of USS
          Holdings, Inc. to management of the Parent Guarantor, its Subsidiaries
          and D. George Harris & Associates Persons;

               (ix)    sales in the ordinary course of business and on a basis
          substantially consistent with prior business practice of timber or the
          right to harvest timber;

               (x)     sales in the ordinary course of business and on a basis
          substantially consistent with prior business practice of limestone,
          the right to mine limestone, waste products and by-products;

               (xi)    transfers of assets by the Borrower or any of its
          Subsidiaries in connection with Investments by the Borrower or any of
          its Subsidiaries permitted by Section 5.02(f)(x) in an aggregate
          amount (based on the fair market value of such assets as determined by
          the Board of Directors of the Borrower) not to exceed, together with
          Investments permitted by Section 5.02(f)(x), an amount equal to
          $7,000,000, provided that, at the time each such transfer of assets is
                      --------
          made, no Default shall have occurred and be continuing; and

               (xii)   transfers of real property to a state, county, local or
          municipal governmental agency in exchange for the granting of a permit
          or the taking of other regulatory action by such governmental agency
          to the extent that such transfers (x) do not, individually or in the
          aggregate, materially interfere with the business of the Borrower and
          its Subsidiaries and (y) enhance the value of mining properties owned
          by the Borrower or one of its Subsidiaries, provided that in the case
                                                      --------
          of each such exchange, the board of directors of the Borrower has
          determined in good faith that such exchange is in the best interest of
          the Borrower.
<PAGE>

                                                                             100

          (f)  Investments in Other Persons.  Make or hold, or permit any of its
               ----------------------------
     Subsidiaries to make or hold, any Investment in any Person other than:

               (i)   Investments by the Borrower or its Subsidiaries in the
          Borrower or wholly-owned Domestic Subsidiaries of the Borrower
          outstanding on the date hereof, and additional Investments from time
          to time hereafter by the Borrower or its Subsidiaries in the Borrower
          or wholly-owned Domestic Subsidiaries of the Borrower, constituting
          advances made by the Borrower or such Subsidiary for working capital
          purposes of the Borrower or such wholly-owned Domestic Subsidiaries,
          for so long as such advances are being evidenced by demand notes from
          the Borrower or such wholly-owned Domestic Subsidiaries, substantially
          in the form of Exhibit N-1 or N-2 hereto, as applicable, that
          constitute Pledged Debt under the Security Agreement;

               (ii)  Investments by the Borrower or its Subsidiaries in its
          wholly-owned Subsidiary, George F. Pettinos (Canada) Limited, in an
          aggregate amount invested not to exceed $1,000,000 from time to time
          outstanding, for so long as such investments are being evidenced by a
          demand note from George F. Pettinos (Canada) Limited, substantially in
          the form of Exhibit O hereto, that constitutes Pledged Debt under the
          Security Agreement;

               (iii) loans and advances to employees in the ordinary course of
          the business of the Borrower and its Subsidiaries as presently
          conducted in an aggregate principal amount not to exceed $300,000 at
          any time outstanding;

               (iv)  Investments by the Loan Parties (x) in Cash Equivalents
          deposited in a Blocked Account (as defined in the Security Agreement)
          in an aggregate amount at any time invested not to exceed $5,000,000,
          (y) in other Cash Equivalents in an aggregate amount at any time
          invested not to exceed $1,500,000, and (z) any further Cash
          Equivalents deposited pursuant to a deferred compensation plan in the
          ordinary course of business of the Loan Parties;

               (v)   Investments in (x) Hedge Agreements permitted under Section
          5.02(b)(i), and in (y) Natural Gas Hedge Agreements permitted under
          Section 5.02(b)(ii);

               (vi)  other Investments existing on the date hereof and described
          on Schedule 4.01(b) or Schedule 4.01(ii) hereto;
<PAGE>

                                                                             101

               (vii)  Investments in the ordinary course of business of the
          Borrower and its Subsidiaries and on a basis substantially consistent
          with prior business practice in the form of extensions of trade
          credit;

               (viii) Investments (x) in the form of loans and advances to
          employees of the Borrower and its Subsidiaries the proceeds of which
          are applied to the purchase of capital stock of USS Holdings, Inc. and
          (y) by the Borrower or its Subsidiaries in capital stock of USS
          Holdings, Inc. arising as a result of acquisition of such capital
          stock from management or other employees, and their respective
          transferees, of the Borrower and its Subsidiaries, provided that the
                                                             --------
          aggregate outstanding principal amount of all such Investments shall
          at no time exceed a total of $600,000;

               (ix)   Investments in the ordinary course of business in an
          insurer required as a condition to the provision by such insurer of
          insurance coverage contemplated by Section 5.01(d);

               (x)    Investments by the Borrower or any of its wholly-owned
          Domestic Subsidiaries in a joint venture with Sylvania Company Limited
          Partnership to process and sell silica from a deposit in Rockwood,
          Michigan in an aggregate amount invested not to exceed, together with
          any transfer of assets permitted by Section 5.02(e)(xi), an amount
          equal to $7,000,000, provided that, at the time each such Investment
                               --------
          is made, no Default shall have occurred and be continuing;

               (xi)   Investments in the form of loans to D. George Harris &
          Associates, LLC pursuant to the Harris Management Agreement, provided
                                                                       --------
          that (A) the aggregate principal amount of all such Investments made
          in any calendar year shall not exceed $1,000,000 and (B) the aggregate
          principal amount of all such investments at any one time outstanding
          shall not exceed $3,000,000;

               (xii)  Investments by the Borrower or any of its Subsidiaries,
          made either directly or through a wholly-owned Subsidiary specially
          organized for the purpose of such Investment, in Permitted
          Acquisitions, provided that
                        --------

                      (A)  before and after giving effect to any such
               Investment, on a pro forma basis for the Rolling Period ended as
               at the end of the most recent period for which financial
               statements were required to be furnished to the Agent pursuant to
               Sections 5.03(b), (c) or (d), the Total Leverage Ratio of the
               Parent Guarantor and its Subsidiaries (calculated to include all
               Investments made after the last day of such Rolling Period as if
               such Investments were made on the last day of such Rolling
               Period) shall be not more than 5.00 to 1.00,
<PAGE>

                                                                             102

                       (B)  the Borrower shall have furnished to the Agent a
               schedule in form satisfactory to the Agent of the computations
               used by the Parent Guarantor in determining compliance with such
               requirements,

                       (C)  the Borrower shall have furnished to the Agent a
               certificate, signed by the chief financial officer or treasurer
               of the Parent Guarantor, substantially in the form of Exhibit M-
               1, attesting to the Solvency of the Parent Guarantor and its
               Subsidiaries as of the effective date of the Investment (taking
               into effect such Investment), and

                       (D)  immediately before and after giving effect thereto,
               no Default shall have occurred and be continuing or would result
               therefrom;

               (xiii)  Investments made by the Borrower or any of its wholly-
          owned Domestic Subsidiaries in the publicly traded securities of a
          Person engaged in a similar line of business as the Borrower and its
          Subsidiaries, such Investments at any one time not to exceed $250,000;

               (xiv)   Investments made by any Loan Party in any wholly-owned
          Domestic Subsidiary of the Parent Guarantor;

               (xv)    Investments made by the Borrower or any of its
          Subsidiaries in the Parent Guarantor in order to permit the repurchase
          or redemption of the capital stock of USS Holdings, Inc. described in
          Section 5.02(g);

               (xvi)   Investments made by any Subsidiary of the Borrower
          incorporated under the laws of Canada or any political subdivision
          thereof (a "Canadian Subsidiary") in another Canadian Subsidiary of
                      -------------------
          the Borrower; and

               (xvii)  Investments made by any Loan Party in the form of the
          incurrence of Debt of the type referred to in clause (i) or (j) of the
          definition of "Debt" (a "Guaranty") in respect of the Debt of any Loan
                         ----      --------
          Party that is permitted under Section 5.02(b); provided that (A) the
                                                         --------
          Parent Guarantor shall not Guaranty the Subordinated Debt and (B) no
          Subsidiary of the Borrower shall Guaranty the Subordinated Debt unless
          (x) such Subsidiary has also Guaranteed the Obligations of the Loan
          Parties under the Loan Documents pursuant to a Subsidiary Guaranty,
          (y) such Guaranty of the Subordinated Debt is subordinated to such
          Guaranty of the Obligations of the Loan Parties under the Loan
          Documents on terms no less favorable to the Lenders than the
          subordination provisions of the Subordinated Debt and (z) such
          Guaranty of the Subordinated Debt provides for the release and
          termination thereof, without any action by any party, upon any sale by
          the Borrower or any of its other Subsidiaries of the capital stock of
          such Subsidiary to
<PAGE>

                                                                             103

          the extent that (A) after giving effect to such sale, such Subsidiary
          will cease to be a Subsidiary and (B) such sale is permitted under the
          Subordinated Debt Documents.

          (g) Restricted Payments.  Declare or pay any dividends (other than
              -------------------
     paid-in-kind preferred dividends), purchase, redeem, retire, defease or
     otherwise acquire for value any of its capital stock or any warrants,
     rights or options to acquire such capital stock, now or hereafter
     outstanding, return any capital to its stockholders as such, make any
     distribution of assets, capital stock, warrants, rights, options,
     obligations or securities to its stockholders as such or issue or sell any
     capital stock or any warrants, rights or options to acquire such capital
     stock (each, a "Restricted Payment"), or permit any of its Subsidiaries to
                     ------------------
     do any of the foregoing or permit any of its Subsidiaries to purchase,
     redeem, retire, defease or otherwise acquire for value any capital stock of
     the Borrower or any warrants, rights or options to acquire such capital
     stock or to issue or sell any capital stock or any warrants, rights or
     options to acquire such capital stock, except that, so long as no Default
     shall have occurred and be continuing at the time of any action described
     below or would result therefrom:  (i) this Section 5.02(g) shall not apply
     to Restricted Payments made by any Subsidiary of the Borrower, provided
                                                                    --------
     that if any such Subsidiary of the Borrower is not a wholly-owned
     Subsidiary of the Borrower, any Restricted Payment made by such Subsidiary
     to a Person other than the Borrower or a wholly-owned Subsidiary of the
     Borrower shall be no greater than such Person's share of such Restricted
     Payment if distributed to the holders of such Subsidiary's capital
     securities held by such holders immediately prior to the making of such
     Restricted Payment and (ii) this Section 5.02(g) shall not apply to
     Restricted Payments made by the Borrower or any of its Subsidiaries
     constituting (A) payments to the Parent Guarantor pursuant to the Tax
     Sharing Agreement, which payments (x) shall be made not earlier than three
     Business Days prior to the date upon which USS Holdings, Inc.'s related
     liability to the relevant governmental authority for tax (including,
     without limitation, estimated taxes) is paid (or, if no such taxes are
     payable, ordinarily would have been due) and (y) shall not exceed the
     amount of income taxes which is to be paid by the Loan Parties to USS
     Holdings, Inc. pursuant to such Tax Sharing Agreement, (B) payments to the
     Parent Guarantor for operating expenses of the Parent Guarantor and USS
     Holdings, Inc. in an annual aggregate amount not to exceed $200,000, (C)
     Restricted Payments made by the Borrower in any Fiscal Year with 50% of its
     portion of Excess Cash Flow for the immediately preceding Fiscal Year in
     connection with the repurchase of any of the outstanding capital stock of
     USS Holdings, Inc. for cash from employees, former employees, officers,
     former officers, directors or former directors of the Borrower or any of
     its Subsidiaries (or permitted transferees of such employees, former
     employees, officers, former officers, directors or former directors),
     pursuant to the terms of agreements (including employment agreements) or
     plans (or amendments thereto) approved by the board of directors of the
     Borrower, the Parent Guarantor or USS Holdings, Inc. under which such
     individuals purchase or sell or are granted the option to
<PAGE>

                                                                             104

     purchase or sell, shares of such common stock, in an amount not to exceed
     $2,000,000 in such Fiscal Year, and (D) payments contemplated under the
     first proviso to Section 5.01(l).

          (h)  Change in Nature of Business.  (i) Engage in any business or
               ----------------------------
     activity other than the ownership, directly or indirectly, of capital stock
     of the Borrower and activities incidental thereto, (ii) own or acquire any
     assets (other than capital stock of the Borrower, cash and Cash Equivalents
     and other assets incidental to maintaining its existence and ownership of
     the foregoing assets) or incur any liabilities (other than liabilities
     under the Loan Documents, liabilities imposed by law, including tax
     liabilities, and other liabilities incidental to its existence and
     permitted business and activities), (iii) permit any of its Subsidiaries to
     make any material change in the nature of its business as carried on at the
     date hereof or (iv) permit any of its Subsidiaries to engage in any
     business not engaged in, or acquire any assets not owned (other than in the
     ordinary course of business or as otherwise permitted under this
     Agreement), on the date hereof.

          (i)  Charter Amendments.  Amend, or permit any of its Subsidiaries to
               ------------------
     amend, its certificate of incorporation or any provision of its bylaws in
     any manner that is adverse to the Lenders in any material respect.

          (j)  Accounting Changes.  Make or permit, or permit any of its
               ------------------
     Subsidiaries to make or permit, any change in accounting policies or
     reporting practices, except as required by generally accepted accounting
     principles.

          (k)  Amendment, Etc., of Related Documents.  Cancel or terminate any
               -------------------------------------
     Related Document or consent to or accept any cancelation or termination
     thereof, amend, modify or change in any manner any term or condition of any
     Related Document or give any consent, waiver or approval thereunder, waive
     any default under or any breach of any term or condition of any Related
     Document, or take any other action in connection with any Related Document
     to the extent that any such action would (i) impair in any material manner
     the value of the interest or rights of the Borrower under such Related
     Document, (ii) impair in any material manner the rights or interests of the
     Agent or any Lender Party or (iii) increase any amount payable by the
     Borrower under the Harris Management Agreement (other than as contemplated
     by such Agreement as in effect on the date hereof), or permit any of its
     Subsidiaries to do any of the foregoing in any such case without the prior
     written consent of the Required Lenders which shall not be unreasonably
     withheld.

          (l)  Negative Pledge; Restrictive Agreements.  Enter into or suffer to
               ---------------------------------------
     exist, or permit any of its Subsidiaries to enter into or suffer to exist,
     any agreement prohibiting or conditioning (a) the payment of dividends or
     the making of any other distributions on its capital stock or the payment
     of any Debt or other obligations owed to the Borrower,
<PAGE>

                                                                             105

     (b) the making of loans or advances to the Borrower, (c) the transfer of
     any of its property or assets to the Borrower or (d) the creation or
     assumption of any Lien upon any of its property or assets, other than (i)
     in favor of the Secured Parties, (ii) in connection with (A) any Surviving
     Debt, or (B) any Debt secured by purchase money Liens and Capitalized
     Leases with respect to the specific assets subject to such Liens or
     Capitalized Leases, (iii) in connection with operating leases or other
     commercial agreements entered into in the ordinary course of business of
     the Borrower and its Subsidiaries on a basis consistent with past practice
     (other than any such agreements pursuant to which the Borrower or its
     Subsidiaries incur Debt) and (iv) in the case of clauses (a), (b) and (c)
     above, (A) any encumbrance or restriction pursuant to applicable law or an
     agreement in effect at or entered into on the date hereof, (B) any
     encumbrance or restriction with respect to a Subsidiary of the Borrower
     pursuant to an agreement relating to any Debt incurred by such Subsidiary
     prior to the date on which such Subsidiary was acquired by the Borrower or
     another Subsidiary of the Borrower (other than Debt incurred as
     consideration in, in contemplation of, or to provide all or any portion of
     the funds or credit support utilized to consummate the transaction or
     series of related transactions pursuant to which such Subsidiary became a
     Subsidiary of the Borrower or was otherwise acquired by the Borrower or any
     of its Subsidiaries) and outstanding on such date, (C) in the case of
     clause (c) above, any encumbrance or restriction (1) that restricts in a
     customary manner the subletting, assignment or transfer of any property or
     asset that is subject to a lease, license or similar contract or (2)
     contained in security agreements securing Debt of the Borrower or any of
     its Subsidiary to the extent such encumbrance or restriction restricts the
     transfer of the property subject to such security agreements, (D) with
     respect to a Subsidiary of the Borrower, any restriction imposed pursuant
     to an agreement entered into for the sale or disposition of all or
     substantially all the capital stock or assets of such Subsidiary pending
     the closing of such sale or disposition and (E) any encumbrance or
     restriction existing or created pursuant to Debt permitted to be incurred
     by a Subsidiary of the Borrower after the date hereof pursuant to Section
     5.02(b); provided, however, that any such encumbrance or restrictions are
     reasonable and customary with respect to the type of Debt being incurred
     (under the relevant circumstances).

          (m) Partnerships.  Become a general partner in any general or limited
              ------------
     partnership or joint venture, or permit any of its Subsidiaries to do so.

          (n) Prepayments of Subordinated Debt, Etc.   (i) Prepay, redeem,
              --------------------------------------
     purchase, defease or otherwise satisfy prior to the scheduled maturity
     thereof in any manner, or make any payment in violation of any
     subordination terms of, the Subordinated Debt, other than the payment of
     regularly scheduled interest and principal payments as and when due in
     respect thereof, or (ii) amend, modify or waive any of its rights under any
     Subordinated Debt Document.
<PAGE>

                                                                             106

          (o) Other Transactions.  Engage or permit any of its Subsidiaries to
              ------------------
     engage in any Hedge Agreements or any transaction involving commodity
     options or futures contracts or any similar speculative transactions
     (including, without limitation, take-or-pay contracts for speculative
     purposes) except for (x) Bank Hedge Agreements permitted under Section
     5.02(b)(i) and (y) Natural Gas Hedge Agreements permitted under Section
     5.02(b)(ii).

          SECTION 5.03.  Reporting Requirements.  So long as any Advance shall
                         ----------------------
remain unpaid, any Letter of Credit or Bankers' Acceptance shall be outstanding
or any Lender Party shall have any Commitment hereunder, the Parent Guarantor,
and to the extent applicable, the Canadian Borrower, will furnish to the Agent:

          (a) Default and Prepayment Notice.  (i) As soon as possible and in any
              -----------------------------
     event within two days after the occurrence of each Default, a statement of
     the chief financial officer or treasurer of the Parent Guarantor or the
     Canadian Borrower, as the case may be, setting forth the nature of such
     Default and the action that such Borrower or Canadian Borrower has taken
     and proposes to take with respect thereto, and (ii) as soon as possible and
     in any event no later than 11:00 A.M. (New York City time) at least three
     Business Days before any prepayment of Term Advances and Acquisition
     Advances is to be made by the Borrower pursuant to Section 2.07(b) (the

     "Prepayment Date"), written notice of the principal amount of such
     ----------------
     prepayment (the "Prepayment Amount") and the applicable Prepayment Date.
                      -----------------
     Each such notice (a "Prepayment Notice") shall be by telecopier or
                          -----------------
     otherwise as provided in Section 8.02.

          (b) Monthly Financials.  As soon as available and in any event within
              ------------------
     30 days after the end of each month, commencing October 31, 1999, an
     unaudited Consolidated balance sheet of the Parent Guarantor and its
     consolidated Subsidiaries as of the end of such month and unaudited
     Consolidated statements of income, stockholders' equity and cash flows of
     the Parent Guarantor and its consolidated Subsidiaries for the period
     commencing at the end of the previous month and ending with the end of such
     month and unaudited Consolidated statements of income, stockholders' equity
     and cash flows of the Parent Guarantor and its consolidated Subsidiaries
     for the period commencing at the end of the previous Fiscal Year and ending
     with the end of such month, setting forth in each case in comparative form
     the corresponding figures for the corresponding month of the preceding
     Fiscal Year, all in reasonable detail and duly certified (subject to normal
     year-end audit adjustments) by the chief financial officer or treasurer of
     the Parent Guarantor, together with (i) a certificate of said officer
     stating that such officer has obtained no knowledge that a Default has
     occurred and is continuing or, if a Default has occurred and is continuing,
     a statement as to the nature thereof and the action that the Parent
     Guarantor has taken and proposes to take with respect thereto, (ii) in the
     event of any change from GAAP in the accounting principles used in the
     preparation of such financial statements, a
<PAGE>

                                                                             107

     statement of reconciliation conforming such financial statements to GAAP
     and (iii) copies of any management discussions relating to the Borrower or
     any of its Subsidiaries distributed to Chase Capital.

          (c)  Quarterly Financials.  (x)  As soon as available and in any event
               --------------------
     within 45 days after the end of each of the first three quarters of each
     Fiscal Year, unaudited Consolidated balance sheets of the Parent Guarantor
     and its consolidated Subsidiaries as of the end of such quarter and
     unaudited Consolidated statements of income and an unaudited Consolidated
     statement of stockholders' equity and cash flows of the Parent Guarantor
     and its consolidated Subsidiaries for the period commencing at the end of
     the previous fiscal quarter and ending with the end of such fiscal quarter
     and unaudited Consolidated statements of income and an unaudited
     Consolidated statement of stockholders' equity and cash flows of the Parent
     Guarantor and its consolidated Subsidiaries for the period commencing at
     the end of the previous Fiscal Year and ending with the end of such
     quarter, setting forth in each case in comparative form the corresponding
     figures for the corresponding period of the preceding Fiscal Year, all in
     reasonable detail and duly certified (subject to year-end audit
     adjustments) by the chief financial officer or treasurer of the Parent
     Guarantor as having been prepared in accordance with accounting principles
     consistent with those applied in the most recent annual audit, together
     with (i) a certificate of said officer stating that such officer has
     obtained no knowledge that a Default has occurred and is continuing or, if
     a Default has occurred and is continuing, a statement as to the nature
     thereof and the action that the Parent Guarantor has taken and proposes to
     take with respect thereto and (ii) in the event of any change from GAAP in
     the accounting principles used in the preparation of such financial
     statements, a statement of reconciliation conforming such financial
     statements to GAAP and (y) within 45 days after the end of each of the
     first three quarters of each Fiscal Year, a schedule in form reasonably
     satisfactory to the Agent of the computations used by the Parent Guarantor
     in determining compliance with the covenants contained in Sections 5.04(a)
     through (c).

          (d)  Annual Financials.  As soon as available and in any event within
               -----------------
     90 days after the end of each Fiscal Year, a copy of the annual audit
     report for such year for the Parent Guarantor and its consolidated
     Subsidiaries, including therein Consolidated balance sheets of the Parent
     Guarantor and the Borrower as of the end of such Fiscal Year and
     Consolidated statements of income and consolidated statements of
     stockholders' equity and cash flows of the Parent Guarantor and the
     Borrower and their consolidated Subsidiaries for such Fiscal Year, in each
     case reported on without qualification arising out of the scope of the
     audit or with respect to the change in Fiscal Year by independent public
     accountants of nationally recognized standing, together with (i) a
     certificate of such accounting firm to the Lender Parties stating that in
     the course of the regular audit of the business of the Parent Guarantor and
     its Subsidiaries, which audit was conducted by such accounting firm in
     accordance with generally accepted auditing standards, such
<PAGE>

                                                                             108

     accounting firm has obtained no knowledge that a Default has occurred and
     is continuing, or if, in the opinion of such accounting firm, a Default has
     occurred and is continuing, a statement as to the nature thereof, (ii) a
     schedule in form reasonably satisfactory to the Agent of the computations
     used by the Parent Guarantor to determine, and confirmed by such
     accountants to be correct in determining, as of the end of such Fiscal
     Year, compliance with the covenants contained in Sections 5.04(a) through
     (c), (iii) a certificate of the chief financial officer or treasurer of the
     Parent Guarantor stating that such officer has obtained no knowledge that a
     Default has occurred and is continuing or, if a Default has occurred and is
     continuing, a statement as to the nature thereof and the action that the
     Parent Guarantor has taken and proposes to take with respect thereto and
     (iv) in the event of any change from GAAP in the accounting principles used
     in the preparation of such financial statements, a statement of
     reconciliation conforming such financial statements to GAAP.

          (e)  Annual Business Plans.  As soon as available and in any event no
               ---------------------
     later than 30 days from the end of each Fiscal Year, the annual Business
     Plans prepared by management of the Borrower.

          (f)  ERISA Events and ERISA Reports.  (i) Promptly and in any event
               ------------------------------
     within 10 Business Days after any Loan Party or any ERISA Affiliate knows
     or has reason to know that any ERISA Event has occurred, a statement of the
     chief financial officer or treasurer of the Borrower describing such ERISA
     Event and the action, if any, that such Loan Party or such ERISA Affiliate
     has taken and proposes to take with respect thereto and (ii) on the date
     any records, documents or other information must be furnished to the PBGC
     with respect to any Plan pursuant to Section 4010 of ERISA, a copy of such
     records, documents and information.

          (g)  Plan Terminations. Promptly and in any event within five Business
               -----------------
     Days after receipt thereof by any Loan Party or any ERISA Affiliate, copies
     of each notice from the PBGC stating its intention to terminate any Plan or
     to have a trustee appointed to administer any Plan.

          (h)  Actuarial Reports.  Promptly upon receipt thereof by any Loan
               -----------------
     Party or any ERISA Affiliate, a copy of the annual actuarial valuation
     report of each Plan.

          (i)  Plan Annual Reports.  Promptly and in any event within 10 days
               -------------------
     after the failure to file by the required deadline, including extensions,
     with the Internal Revenue Service a required annual report (Form 5500
     Series), including required schedules, with respect to any Plan, a
     statement of the chief financial officer or treasurer of the Borrower
     describing such failure and the action, if any, that the Borrower, or any
     Loan Party or ERISA Affiliate, has taken and proposes to take with respect
     thereto.
<PAGE>

                                                                             109

          (j)  Multiemployer Plan Notices.  Promptly and in any event within ten
               --------------------------
     Business Days after receipt thereof by any Loan Party or any ERISA
     Affiliate from the sponsor of a Multiemployer Plan, copies of each notice
     concerning (i) the imposition of Withdrawal Liability by any such
     Multiemployer Plan, (ii) the reorganization or termination, within the
     meaning of Title IV of ERISA, of any such Multiemployer Plan or (iii) the
     amount of liability incurred, or that may be incurred, by such Loan Party
     or any ERISA Affiliate in connection with any event described in clause (i)
     or (ii).

          (k)  Litigation.  Promptly after the commencement thereof, notice of
               ----------
     all actions, suits, investigations, litigation and proceedings before any
     court or governmental department, commission, board, bureau, agency or
     instrumentality, domestic or foreign, affecting any Loan Party or any of
     its Subsidiaries of the type described in Section 4.01(i).

          (l)  Securities Reports. Promptly after the sending or filing thereof,
               ------------------
     copies of all proxy statements, financial statements and reports that any
     Loan Party or any of its Subsidiaries sends to its stockholders, and copies
     of all regular, periodic and special reports, and all registration
     statements, that any Loan Party or any of its Subsidiaries files with the
     Securities and Exchange Commission or any governmental authority that may
     be substituted therefor, or with any national securities exchange.

          (m)  Agreement Notices.  Promptly upon receipt thereof, copies of all
               -----------------
     notices, requests and other documents received by any Loan Party or any of
     its Subsidiaries under or pursuant to any Related Document regarding or
     related to any breach or default by any party thereto or any other event
     that could materially impair the value of the interests or the rights of
     any Loan Party or any of its Subsidiaries or otherwise have a Material
     Adverse Effect and copies of any amendment, modification or waiver of any
     provision of any Related Document and, from time to time upon request by
     the Agent, such information and reports regarding the Related Documents as
     the Agent may reasonably request.

          (n)  Revenue Agent Reports.  Within 15 days after receipt, copies of
               ---------------------
     all Revenue Agent Reports (Internal Revenue Service Form 886-A or any
     successor form prescribed by the Internal Revenue Service), that propose,
     determine or otherwise set forth positive adjustments to the Federal income
     tax liability of the affiliated group (within the meaning of Section
     1504(a)(1) of the Internal Revenue Code) of which the Borrower is a member
     aggregating $500,000 or more.

          (o)  Environmental Conditions.  Promptly after receipt, notice thereof
               ------------------------
     any Environmental Action against, or the occurrence of any condition on any
     property of any Loan Party or any of its Subsidiaries that results in a
     material noncompliance by any Loan Party or any of its Subsidiaries with
     any Environmental Law or Environmental
<PAGE>

                                                                             110

     Permit, that could (i) be reasonably expected to have a Material Adverse
     Effect or (ii) cause any property described in the Mortgages to be subject
     to any material restrictions on ownership, occupancy, use or
     transferability under any Environmental Law.

          (p)  Real Property.  As soon as available and in any event within 30
               -------------
     days after the end of each Fiscal Year, a report supplementing Schedules
     4.01(gg) and 4.01(hh) hereto, including an identification of all material
     real and leased property disposed of by the Borrower or any of its
     Subsidiaries during such Fiscal Year, a list and description (including the
     county or other relevant jurisdiction, state, record owner, and in the case
     of leases of property, lessor, lessee, expiration date and annual rental
     cost thereof) of all material real property acquired or leased during such
     Fiscal Year and a description of such other changes in the information
     included in such Schedules as may be necessary for such Schedules to be
     accurate and complete; provided, however, that the Borrower shall notify
                            --------  -------
     the Agent within 15 days following any acquisition of real property which
     permits the Agent to request security on such property pursuant to Section
     5.01(m)(ii).

          (q)  Material Adverse Change.  Prompt notice of any development that
               -----------------------
     results in, or could reasonably be expected to result in, a material
     adverse change in the business, condition (financial or otherwise),
     operations, performance, properties or prospects of the Parent Guarantor
     and its Subsidiaries, taken as a whole, since December 31, 1998.

          (r)  Other Information.  Such other information respecting the
               -----------------
     business, condition (financial or otherwise), operations, performance,
     properties or prospects of any Loan Party or any of its Subsidiaries as any
     Lender Party (through the Agent) may from time to time reasonably request.

          SECTION 5.04.  Financial Covenants.  So long as any Advance shall
                         -------------------
remain unpaid, any Letter of Credit or Bankers' Acceptance shall be outstanding
or any Lender Party shall have any Commitment hereunder, the Parent Guarantor
will:

          (a)  Leverage Ratio.  Maintain on a Consolidated basis for itself and
               --------------
     its Subsidiaries a Leverage Ratio for each Rolling Period set forth below
     of not more than the amount set forth below for such Rolling Period:

================================================================================
Rolling Period Ending On or About                          Ratio
---------------------------------                          -----
--------------------------------------------------------------------------------
Quarter Ending
--------------
--------------------------------------------------------------------------------
December 31, 1999                                       5.50 to 1.00
--------------------------------------------------------------------------------
March 31, 2000                                          5.25 to 1.00
June 30, 2000                                           5.00 to 1.00
<PAGE>

                                                                             111

================================================================================
Rolling Period Ending On or About                          Ratio
---------------------------------                          -----
Quarter Ending
--------------
--------------------------------------------------------------------------------
September 30, 2000                                      5.00 to 1.00
December 31, 2000                                       5.00 to 1.00
--------------------------------------------------------------------------------
March 31, 2001                                          4.50 to 1.00
June 30, 2001                                           4.50 to 1.00
September 30, 2001                                      4.25 to 1.00
December 31, 2001                                       4.00 to 1.00
--------------------------------------------------------------------------------
March 31, 2002                                          3.75 to 1.00
June 30, 2002                                           3.75 to 1.00
September 30, 2002                                      3.50 to 1.00
December 31, 2002                                       3.50 to 1.00
--------------------------------------------------------------------------------
March 31, 2003;                                         3.25 to 1.00
and each fiscal quarter thereafter
================================================================================

             (b)   Interest Coverage Ratio.  Maintain on a Consolidated basis
                   -----------------------
     for itself and its Subsidiaries an Interest Coverage Ratio for each Rolling
     Period set forth below of not less than the amount set forth below for such
     Rolling Period:

================================================================================
Rolling Period Ending On or About                          Ratio
---------------------------------                          -----
Quarter Ending
--------------------------------------------------------------------------------
March 31, 2000                                          1.75 to 1.00
June 30, 2000                                           1.75 to 1.00
September 30, 2000                                      1.75 to 1.00
December 31, 2000                                       1.75 to 1.00
--------------------------------------------------------------------------------
March 31, 2001                                          1.75 to 1.00
June 30, 2001                                           1.75 to 1.00
September 30, 2001                                      1.75 to 1.00
December 31, 2001                                       2.00 to 1.00
--------------------------------------------------------------------------------
March 31, 2002                                          2.00 to 1.00
June 30, 2002                                           2.00 to 1.00
September 30, 2002                                      2.00 to 1.00
December 31, 2002                                       2.25 to 1.00
--------------------------------------------------------------------------------
March 31, 2003                                          2.25 to 1.00
June 30, 2003                                           2.25 to 1.00
--------------------------------------------------------------------------------
<PAGE>

                                                                             112

================================================================================
Rolling Period Ending On or About                                 Ratio
---------------------------------                                 -----
September 30, 2003                                             2.25 to 1.00
December 31, 2003                                              2.50 to 1.00
--------------------------------------------------------------------------------
March 31, 2004                                                 2.50 to 1.00
June 30, 2004                                                  2.50 to 1.00
September 30, 2004                                             2.50 to 1.00
December 31, 2004                                              2.75 to 1.00
--------------------------------------------------------------------------------

March 31, 2005                                                 2.75 to 1.00
June 30, 2005                                                  2.75 to 1.00
September 30, 2005                                             2.75 to 1.00
December 31, 2005; and for each fiscal quarter thereafter      3.00 to 1.00
================================================================================

          (c)  Capital Expenditures.  In addition to any amount excluded from
               --------------------
     the definition of "Extraordinary Receipts" by virtue of the proviso in such
     definition, make, or permit any of its Subsidiaries to make, any Capital
     Expenditures that would cause the aggregate of all such Capital
     Expenditures made by the Borrower and its Subsidiaries in any Fiscal Year
     set forth below to exceed the amount set forth below for such Fiscal Year.

                Fiscal Year                         Amount
                -----------                         ------
                    1999                          $20,000,000
                    2000                          $32,000,000
                    2001                          $22,500,000
                    2002                          $15,000,000
                    2003                          $15,000,000
                    2004                          $15,000,000
                    2005                          $15,000,000
                    2006                          $15,000,000
                    2007                          $15,000,000

     provided, however, that 50% of the amount of Capital Expenditures permitted
     --------  -------
     hereunder to be made in any Fiscal Year listed above in this subsection (c)
     or permitted to be made pursuant to the third proviso to this subsection
     (c) that are not made in such Fiscal Year plus (i) any amount of Excess
                                               ----
     Cash Flow retained by the Parent Guarantor and its Subsidiaries from the
     prior Fiscal Year and (ii) the amount of Capital Expenditures permitted to
     be made in any Fiscal Year listed above in this subsection (c) pursuant to
     the fourth proviso to this subsection (c) that are not made in such Fiscal
     Year (such amounts being referred to herein as the "Carryover Amount") may
                                                         ----------------
     be carried forward to the next (but not any subsequent) Fiscal Year,
     provided further that for purposes of this
     -------- -------
<PAGE>

                                                                             113

     Section 5.04(c), Capital Expenditures made in any Fiscal Year shall be
     deemed to be made first as a use of Capital Expenditures permitted to be
     made pursuant to the first proviso of this Section 5.04(c), second as a use
     of the limit of Capital Expenditures set forth above for such Fiscal Year,
     third as a use of Capital Expenditures permitted to be made pursuant to the
     fourth proviso of this Section 5.04(c), and subsequently, as a use of
     Capital Expenditures permitted to be made pursuant to the third proviso of
     this Section 5.04(c), provided further upon the consummation of a Permitted
                           -------- -------
     Acquisition, the Borrower and its Subsidiaries will be permitted to make
     additional Capital Expenditures in an aggregate amount not to exceed 9% of
     the total consideration paid for such Permitted Acquisition in each Fiscal
     Year, commencing in the Fiscal Year in which such Permitted Acquisition is
     made, and provided further upon the consummation of any disposition of real
               -------- -------
     property permitted pursuant to Section 5.02(e)(v), the Borrower and its
     Subsidiaries will be permitted to make additional Capital Expenditures in
     the Fiscal Year in which such disposition is consummated in an aggregate
     amount not to exceed the Net Cash Proceeds received by the Borrower and its
     Subsidiaries in connection with such disposition.

          SECTION 5.05.  Covenants of the Canadian Borrower.  So long as any
                         ----------------------------------
Advance shall remain unpaid, any Letter of Credit or Bankers' Acceptance shall
be outstanding or any Lender Party shall have any Commitment hereunder, the
Canadian Borrower will at all times perform or observe, and will cause each of
its Subsidiaries to perform or observe, all of the terms, covenants and
agreements that the Loan Documents state that the Parent Guarantor or the
Borrower, as applicable, is to cause such Canadian Borrower or such Subsidiaries
to perform or observe.

                                  ARTICLE VI

                               EVENTS OF DEFAULT

          SECTION 6.01.  Events of Default.  If any of the following events
                         -----------------
("Events of Default") shall occur and be continuing:
  -----------------

          (a)  the Borrower or the Canadian Borrower shall fail to pay any
     principal of, or interest on, any Advance or any portion of any Bankers'
     Acceptance when the same becomes due and payable, whether at the due date
     thereof or at a date fixed for prepayment or otherwise, or any Loan Party
     shall fail to make any other payment in excess of $10,000 under any Loan
     Document within 10 days from when the same becomes due and payable; or
<PAGE>

                                                                             114

               (b)  any representation or warranty made or deemed made by any
     Loan Party (or any of its officers) under or in connection with any Loan
     Document shall prove to have been incorrect in any material respect as of
     the time when made or deemed made; or

               (c)  the Borrower shall fail to perform or observe any term,
     covenant or agreement contained in Section 2.16, 5.01(e), (f), (g), (l),
     (m) or (n), 5.02, 5.03 or 5.04; or

               (d)  any Loan Party shall fail to perform any other term,
     covenant or agreement contained in any Loan Document on its part to be
     performed or observed if such failure shall remain unremedied for 10 days
     after the earlier of the date on which (A) a Responsible Officer of the
     Borrower or the Canadian Borrower becomes aware of such failure or (B)
     written notice thereof shall have been given to the Borrower or the
     Canadian Borrower, as the case may be, by the Agent or any Lender Party; or

               (e)  any Loan Party or any of its Subsidiaries shall fail to pay
     any principal of, premium or interest on or any other amount payable in
     respect of any Debt that is outstanding in a principal or notional amount
     of at least $1,000,000 either individually or in the aggregate (but
     excluding Debt outstanding hereunder) of such Loan Party or such Subsidiary
     (as the case may be), when the same becomes due and payable (whether by
     scheduled maturity, required prepayment, acceleration, demand or
     otherwise), and such failure shall continue after the applicable grace
     period, if any, specified in the agreement or instrument relating to such
     Debt; or any other event shall occur or condition shall exist under any
     agreement or instrument relating to any such Debt and shall continue after
     the applicable grace period, if any, specified in such agreement or
     instrument, if the effect of such event or condition is to accelerate, or
     to permit the acceleration of, the maturity of such Debt or otherwise to
     cause, or to permit the holder thereof to cause, such Debt to mature; or
     any such Debt shall be declared to be due and payable or required to be
     prepaid or redeemed (other than by a regularly scheduled required
     prepayment or redemption), purchased or defeased, or an offer to prepay,
     redeem, purchase or defease such Debt shall be required to be made, in each
     case prior to the stated maturity thereof; or

               (f)  any Loan Party or any of its Subsidiaries shall generally
     not pay its debts as such debts become due, or shall admit in writing its
     inability to pay its debts generally, or shall make a general assignment
     for the benefit of creditors; or any proceeding shall be instituted by or
     against any Loan Party or any of its Subsidiaries seeking to adjudicate it
     a bankrupt or insolvent, or seeking liquidation, winding up,
     reorganization, arrangement, adjustment, protection, relief, or composition
     of it or its debts under any law relating to bankruptcy, insolvency or
     reorganization or relief of debtors, or seeking the entry of an order for
     relief or the appointment of a receiver, trustee, or other similar official
     for it or for any substantial part of its property and, in the case of any
     such proceeding instituted against it (but not instituted by it) that is
     being diligently contested by it in good faith,
<PAGE>

                                                                             115

     either such proceeding shall remain undismissed or unstayed for a period of
     60 days or any of the actions sought in such proceeding (including, without
     limitation, the entry of an order for relief against, or the appointment of
     a receiver, trustee, custodian or other similar official for, it or any
     substantial part of its property) shall occur; or any Loan Party or any of
     its Subsidiaries shall take any corporate action to authorize any of the
     actions set forth above in this subsection (f); or

               (g)  any judgment or order for the payment of money in excess of
     $1,000,000 (to the extent not fully paid or discharged) shall be rendered
     against any Loan Party or any of its Subsidiaries and either (i)
     enforcement proceedings shall have been commenced by any creditor upon such
     judgment or order or (ii) there shall be any period of 15 consecutive days
     during which a stay of enforcement of such judgment or order, by reason of
     a pending appeal or otherwise, shall not be in effect; or

               (h)  any non-monetary judgment or order shall be rendered against
     any Loan Party or any of its Subsidiaries that is reasonably expected to
     have a Material Adverse Effect, and there shall be any period of 15
     consecutive days during which a stay of enforcement of such judgment or
     order, by reason of a pending appeal or otherwise, shall not be in effect;
     or

               (i)  any provision of any Loan Document after delivery thereof
     pursuant to Section 3.01, 5.01(m) or 5.01(n) shall for any reason cease to
     be valid and binding on or enforceable against any Loan Party to it, or any
     such Loan Party shall so state in writing; or

               (j)  any Collateral Document after delivery thereof pursuant to
     Section 3.01 or 5.01(m) shall for any reason (other than pursuant to the
     terms thereof) cease to create a valid and perfected first priority lien on
     and security interest in the Collateral purported to be covered thereby
     (except as contemplated by the Security Agreement); or

               (k)  Chase Capital and D. George Harris & Associates Persons, or
     entities directly or indirectly controlled by them, shall together (A)
     cease to be the record and beneficial owners of at least 51% of the
     aggregate voting power represented by the outstanding capital stock
     (including the Series B Preferred Stock) of USS Holding, Inc., (B) cause or
     permit any of such shares to be subject to any Lien (other than a Lien in
     favor of a Loan Party permitted by this Agreement) or (C) cease to control,
     directly or indirectly, the Board of Directors of USS Holdings, Inc., the
     Parent Guarantor or the Borrower; or

               (l)  the Borrower shall cease to own, directly or indirectly,
     100% of the capital stock of each of Silica and Stone Materials Company
     LLC, the Parent Guarantor shall cease to own, directly or indirectly, 100%
     of the capital stock of the Borrower or USS
<PAGE>

                                                                             116

     Holdings, Inc. shall cease to own, directly or indirectly, 100% of the
     capital stock of the Parent Guarantor; or

               (m)  any ERISA Event shall have occurred with respect to a Plan
     and the sum (determined as of the date of occurrence of such ERISA Event)
     of the Insufficiency of such Plan and the Insufficiency of any and all
     other Plans with respect to which an ERISA Event shall have occurred and
     then exist (or the liability of the Loan Parties and the ERISA Affiliates
     related to such ERISA Event) exceeds $1,000,000 and is reasonably expected
     to have a Material Adverse Effect; or

               (n)  any Loan Party or any ERISA Affiliate shall have been
     notified by the sponsor of a Multiemployer Plan that it has incurred
     Withdrawal Liability to such Multiemployer Plan in an amount that, when
     aggregated with all other amounts required to be paid to Multiemployer
     Plans by the Loan Parties and the ERISA Affiliates as Withdrawal Liability
     (determined as of the date of such notification), exceeds $1,000,000 or
     requires payments exceeding $200,000 per annum and is reasonably expected
     to have a Material Adverse Effect; or

               (o)  any Loan Party or any ERISA Affiliate shall have been
     notified by the sponsor of a Multiemployer Plan that such Multiemployer
     Plan is in reorganization or is being terminated, within the meaning of
     Title IV of ERISA, and as a result of such reorganization or termination
     the aggregate annual contributions of the Loan Parties and the ERISA
     Affiliates to all Multiemployer Plans that are then in reorganization or
     being terminated have been or will be increased over the amounts
     contributed to such Multiemployer Plans for the plan years of such
     Multiemployer Plans immediately preceding the plan year in which such
     reorganization or termination occurs by an amount exceeding $200,000 and is
     reasonably expected to have a Material Adverse Effect; or

               (p)  the occurrence of a "Change of Control" as defined in the
     Subordinated Debt Documents;

then, and in any such event, the Agent (i) shall at the request, or may with the
consent, of the Required Lenders, by notice to the Borrower or the Canadian
Borrower, as applicable, declare the obligation of each Appropriate Lender to
make Advances (other than Letter of Credit Advances by an Issuing Bank or a
Working Capital Lender pursuant to Section 2.03(c) and Swing Line Advances by a
Working Capital Lender pursuant to Section 2.02 (f)), of each Canadian Lender to
create and/or purchase Bankers' Acceptances and of each Issuing Bank to issue
Letters of Credit to be terminated, whereupon the same shall forthwith
terminate, and (ii) shall at the request, or may with the consent, of the
Required Lenders, by notice to the Borrower or the Canadian Borrower, as
applicable, declare the Advances, all interest thereon and all other amounts
payable under this Agreement, the Notes, if any, and the other Loan Documents to
be forthwith due and payable, whereupon the Advances, all such interest and all
<PAGE>

                                                                             117

such amounts shall become and be forthwith due and payable, without presentment,
demand, protest or further notice of any kind, all of which are hereby expressly
waived by the Borrower and the Canadian Borrower; provided, however, that in the
                                                  --------  -------
event of an actual or deemed entry of an order for relief with respect to any
Loan Party or any of its Subsidiaries under the Federal Bankruptcy Code, (x) the
obligation of each Lender to make Advances (other than Letter of Credit Advances
by an Issuing Bank or a Working Capital Lender pursuant to Section 2.03(c) and
Swing Line Advances by a Working Capital Lender pursuant to Section 2.02(f)), of
each Canadian Lender to create and/or purchase Bankers' Acceptances and of each
Issuing Bank to issue Letters of Credit shall automatically be terminated and
(y) the Advances, all such interest and all such amounts shall automatically
become and be due and payable, without presentment, demand, protest or any
notice of any kind, all of which are hereby expressly waived by the Borrower and
the Canadian Borrower.
<PAGE>

                                                                             118

          SECTION 6.02.  Actions in Respect of the Letters of Credit and
                         -----------------------------------------------
Bankers' Acceptances upon Default.  If any Event of Default shall have occurred
---------------------------------
and be continuing, the Agent may, irrespective of whether it is taking any of
the actions described in Section 6.01 or otherwise, (a) make demand upon the
Borrower to, and forthwith upon such demand the Borrower will, pay to the Agent
on behalf of the Lender Parties in same day funds at the Agent's office
designated in such demand, for deposit in the L/C Cash Collateral Account, an
amount equal to the aggregate Available Amount of all Letters of Credit then
outstanding and (b) make demand upon the Canadian Borrower to, and forthwith
upon such demand, the Canadian Borrower will, pay to the Agent on behalf of the
Canadian Lenders in same day funds at the Agent's office designated in such
demand, for deposit in the Canadian Cash Collateral Account, an amount equal to
the aggregate Face Amount of all Bankers' Acceptances then outstanding.  If at
any time the Agent determines that any funds held in the L/C Cash Collateral
Account are subject to any right or claim of any Person other than the Agent and
the Lender Parties or that the total amount of such funds is less than the
aggregate Available Amount of all Letters of Credit, the Borrower will,
forthwith upon demand by the Agent, pay to the Agent, as additional funds to be
deposited and held in the L/C Cash Collateral Account, an amount equal to the
excess of (a) such aggregate Available Amount over (b) the total amount of
funds, if any, then held in the L/C Cash Collateral Account that the Agent
determines to be free and clear of any such right and claim.  If at any time the
Agent determines that any funds held in the Canadian Cash Collateral Account are
subject to any right or claim of any Person other than the Agent and the
Canadian Lenders or that the total amount of such funds is less than the
aggregate Face Amount of all Bankers' Acceptances, the Canadian Borrower will,
forthwith upon demand by the Agent, pay to the Agent, as additional funds to be
deposited and held in the Canadian Cash Collateral Account, an amount equal to
the excess of (a) such aggregate Face Amount over (b) the total amount of funds,
if any, then held in the Canadian Cash Collateral Account that the Agent
determines to be free and clear of any such right and claim.

                                  ARTICLE VII

                                   THE AGENT
<PAGE>

                                                                             119

          SECTION 7.01.  Authorization and Action.  Each Lender Party (in its
                         ------------------------
capacities as a Lender, an Issuing Bank (if applicable), the Swing Line Bank (if
applicable) and a potential Hedge Bank) hereby appoints and authorizes the Agent
and any Sub-Agent appointed by the Agent to take such action as agent on its
behalf and to exercise such powers and discretion under this Agreement and the
other Loan Documents as are delegated to the Agent and the Sub-Agent by the
terms hereof and thereof, together with such powers and discretion as are
reasonably incidental thereto.  As to any matters not expressly provided for by
the Loan Documents (including, without limitation, enforcement or collection of
Debt resulting from the Advances), the Agent and the Sub-Agent shall not be
required to exercise any discretion or take any action, but shall be required to
act or to refrain from acting (and shall be fully protected in so acting or
refraining from acting) upon the instructions of the Required Lenders, and such
instructions shall be binding upon all Lender Parties and all holders of Notes;
provided, however, that the Agent and the Sub-Agent shall not be required to
--------  -------
take any action that exposes the Agent or the Sub-Agent, as the case may be, to
personal liability or that is contrary to this Agreement or applicable law.  The
Agent agrees to give to each Lender Party prompt notice of each notice given to
it by the Borrower pursuant to the terms of this Agreement.  The Agent further
agrees to deliver to each Lender Party copies of each financial statement,
Business Plan or other document furnished to the Agent pursuant to Section
5.03(b), (c), (d) or (e).

          SECTION 7.02.  Agent's Reliance, Etc.  Neither the Agent, the Sub-
                         ---------------------
Agent nor any of its directors, officers, agents or employees shall be liable
for any action taken or omitted to be taken by it or them under or in connection
with the Loan Documents, except for its or their own gross negligence or willful
misconduct.  Without limitation of the generality of the foregoing, the Agent
and the Sub-Agent:  (a) may treat the Lender that made any Advance as the holder
of the Debt resulting therefrom until the Agent receives and accepts an
Assignment and Acceptance entered into by such Lender, as assignor, and an
Eligible Assignee, as assignee, as provided in Section 8.07; (b) may consult
with legal counsel (including counsel for any Loan Party), independent public
accountants and other experts selected by it and shall not be liable for any
action taken or omitted to be taken in good faith by it in accordance with the
advice of such counsel, accountants or experts; (c) makes no warranty or
representation to any Lender Party and shall not be responsible to any Lender
Party for any statements, warranties or representations (whether written or
oral) made in or in connection with the Loan Documents; (d) shall not have any
duty to ascertain or to inquire as to the performance or observance of any of
the terms, covenants or conditions of any Loan Document on the part of any Loan
Party or to inspect the property (including the books and records) of any Loan
Party; (e) shall not be responsible to any Lender Party for the due execution,
legality, validity, enforceability, genuineness, sufficiency or value of, or the
perfection or priority of any lien or security interest created or purported to
be created under or in connection with, any Loan Document or any other
instrument or document furnished pursuant thereto; and (f) shall incur no
liability under or in respect of any Loan Document by acting upon any notice,
consent, certificate or other instrument or writing (which may be by telegram,
telecopy or telex) believed by it to be genuine and signed or sent by the proper
party or parties.
<PAGE>

                                                                             120

          SECTION 7.03.  BNP and Affiliates.  With respect to its Commitments,
                         ------------------
the Advances made by it and any Notes issued to it, BNP shall have the same
rights and powers under the Loan Documents as any other Lender Party and may
exercise the same as though it were not the Agent; and the term "Lender Party"
or "Lenders Parties" shall, unless otherwise expressly indicated, include BNP in
its individual capacity.  BNP and its affiliates may accept deposits from, lend
money to, act as trustee under indentures of, accept investment banking
engagements from and generally engage in any kind of business with, any Loan
Party, any of its Subsidiaries and any Person who may do business with or own
securities of any Loan Party or any such Subsidiary, all as if BNP were not the
Agent and without any duty to account therefor to the Lender Parties.

          SECTION 7.04.  Lender Party Credit Decision.  Each Lender Party
                         ----------------------------
acknowledges that it has, independently and without reliance upon the Agent or
any other Lender Party and based on the financial statements referred to in
Section 4.01 and such other documents and information as it has deemed
appropriate, made its own credit analysis and decision to enter into this
Agreement.  Each Lender Party also acknowledges that it will, independently and
without reliance upon the Agent, the Sub-Agent or any other Lender Party and
based on such documents and information as it shall deem appropriate at the
time, continue to make its own credit decisions in taking or not taking action
under this Agreement.

          SECTION 7.05.  Indemnification.  (a)  Each Lender Party severally
                         ---------------
agrees to indemnify the Agent and the Sub-Agent (to the extent not promptly
reimbursed by the Borrower or the Canadian Borrower) from and against such
Lender Party's ratable share (determined as provided below) of any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements of any kind or nature whatsoever that may be
imposed on, incurred by, or asserted against the Agent or the Sub-Agent in any
way relating to or arising out of the Loan Documents or any action taken or
omitted by the Agent under the Loan Documents; provided, however, that no Lender
                                               --------  -------
Party shall be liable for any portion of such liabilities, obligations, losses,
damages, penalties, actions, judgments, suits, costs, expenses or disbursements
resulting from the Agent's or the Sub-Agent's gross negligence or willful
misconduct.  Without limitation of the foregoing, each Lender Party agrees to
reimburse the Agent and the Sub-Agent promptly upon demand for its ratable share
of any costs and expenses (including, without limitation, fees and expenses of
counsel) payable by the Borrower under Section 8.04, to the extent that the
Agent or the Sub-Agent is not promptly reimbursed for such costs and expenses by
the Borrower or the Canadian Borrower.  For purposes of this Section 7.05, the
Lender Parties' respective ratable shares of any amount shall be determined, at
any time, according to the sum of (a) the aggregate principal amount of the
Advances outstanding at such time and owing to the respective Lender Parties,
(b) their respective Pro Rata Shares of the aggregate Available Amount of all
Letters of Credit outstanding at such time, (c) their respective pro rata shares
of the aggregate Face Amount of all Bankers' Acceptances outstanding at such
time, (d) the aggregate unused portions of their respective Term
<PAGE>

                                                                             121

Commitments at such time and (e) their respective Unused Working Capital
Commitments, Unused Acquisition Commitments and Unused Canadian Commitments at
such time. The failure of any Lender Party to reimburse the Agent or the Sub-
Agent promptly upon demand for its ratable share of any amount required to be
paid by the Lender Party to the Agent as provided herein shall not relieve any
other Lender Party of its obligation hereunder to reimburse the Agent for its
ratable share of such amount, but no Lender Party shall be responsible for the
failure of any other Lender Party to reimburse the Agent or the Sub-Agent for
such other Lender Party's ratable share of such amount. Without prejudice to the
survival of any other agreement of any Lender Party hereunder, the agreement and
obligations of each Lender Party contained in this Section 7.05(a) shall survive
the payment in full of principal, interest and all other amounts payable
hereunder and under the other Loan Documents.

          (b)  Each Lender Party severally agrees to indemnify each Issuing Bank
(to the extent not promptly reimbursed by the Borrower) from and against such
Lender Party's ratable share (determined as provided below) of any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements of any kind or nature whatsoever that may be
imposed on, incurred by, or asserted against such Issuing Bank in any way
relating to or arising out of the Loan Documents or any action taken or omitted
by such Issuing Bank under the Loan Documents; provided, however, that no Lender
                                               --------  -------
Party shall be liable for any portion of such liabilities, obligations, losses,
damages, penalties, actions, judgments, suits, costs, expenses or disbursements
resulting from such Issuing Bank's gross negligence or willful misconduct.
Without limitation of the foregoing, each Lender Party agrees to reimburse such
Issuing Bank promptly upon demand for its ratable share of any costs and
expenses (including, without limitation, fees and expenses of counsel) payable
by the Borrower under Section 8.04, to the extent that such Issuing Bank is not
promptly reimbursed for such costs and expenses by the Borrower.  For purposes
of this Section 7.05(b), the Lender Parties' respective ratable shares of any
amount shall be determined, at any time, according to the sum of (a) the
aggregate principal amount of the Advances outstanding at such time and owing to
the respective Lender Parties, (b) their respective Pro Rata Shares of the
aggregate Available Amount of all Letters of Credit outstanding at such time,
(c) their respective pro rata shares of the aggregate Face Amount of all
Bankers' Acceptances outstanding at such time, (d) the aggregate unused portions
of their respective Term Commitments at such time and (e) their respective
Unused Working Capital Commitments and Unused Acquisition Commitments at such
time.  The failure of any Lender Party to reimburse such Issuing Bank promptly
upon demand for its ratable share of any amount required to be paid by the
Lender Parties to such Issuing Bank as provided herein shall not relieve any
other Lender Party of its obligation hereunder to reimburse such Issuing Bank
for its ratable share of such amount, but no Lender Party shall be responsible
for the failure of any other Lender Party to reimburse such Issuing Bank for
such other Lender Party's ratable share of such amount.  Without prejudice to
the survival of any other agreement of any Lender Party hereunder, the agreement
and obligations of each Lender Party contained in this Section 7.05(b) shall
survive the payment in full of principal, interest and all other amounts payable
hereunder and under the other Loan Documents.
<PAGE>

                                                                             122

          SECTION 7.06. Successor Agents. (a) The Agent.  The Agent may resign
                        ----------------      ---------
at any time by giving written notice thereof to the Lender Parties, the Borrower
and the Canadian Borrower and may be removed at any time with or without cause
by the Required Lenders. Upon any such resignation or removal, the Required
Lenders shall have the right to appoint a successor Agent with the consent
(unless a Default has occurred and is continuing) of the Borrower and the
Canadian Borrower (not to be unreasonably withheld). If no successor Agent shall
have been so appointed by the Required Lenders, and shall have accepted such
appointment, within 30 days after the retiring Agent's giving of notice of
resignation or the Required Lenders' removal of the retiring Agent, then the
retiring Agent may, on behalf of the Lender Parties, appoint a successor Agent
with the consent (unless a Default has occurred and is continuing) of the
Borrower and the Canadian Borrower (not to be unreasonably withheld), which
shall be a commercial bank organized under the laws of the United States or of
any State thereof and having a combined capital and surplus of at least
$250,000,000. Upon the acceptance of any appointment as Agent hereunder by a
successor Agent and upon the execution and filing or recording of such financing
statements, or amendments thereto, and such other instruments or notices, as may
be necessary or desirable, or as the Required Lenders may request, in order to
continue the perfection of the Liens granted or purported to be granted by the
Collateral Documents, such successor Agent shall succeed to and become vested
with all the rights, powers, discretion, privileges and duties of the retiring
Agent, and the retiring Agent shall be discharged from its duties and
obligations under the Loan Documents. After any retiring Agent's resignation or
removal hereunder as Agent, the provisions of this Article VII shall inure to
its benefit as to any actions taken or omitted to be taken by it while it was
Agent under this Agreement.
<PAGE>

                                                                             123

          (b)  The Sub-Agent. The Sub-Agent may resign at any time by giving
               -------------
written notice thereof to the Agent and may be removed at any time with or
without cause by written request of the Agent.  The Agent shall be entitled to
appoint a successor Sub-Agent, which shall be a resident in Canada for purposes
of the Income Tax Act (Canada) and which shall be, so long as no Default has
occurred and is continuing, subject to the approval of the Borrower, which
approval shall not be unreasonably withheld or delayed.  The Sub-Agent has been
designated under this Agreement to carry out duties of the Agent with respect of
the Canadian Facility.  The Sub-Agent shall be subject to each of the
obligations in this Agreement and the Collateral Documents to be performed by
the Sub-Agent, and each of the Borrower, the Canadian Borrower and the Lenders
agrees that the Sub-Agent shall be entitled to exercise each of the rights and
shall be entitled to each of the benefits of the Agent under this Agreement and
the Collateral Documents as relate to the performance of its obligations
hereunder and thereunder.

                                 ARTICLE VIII

                                 MISCELLANEOUS
<PAGE>

                                                                             124

          SECTION 8.01.  Amendments, Etc.  No amendment or waiver of any
                         ---------------
provision of this Agreement or any Notes or any other Loan Document, nor any
consent to any departure by the Borrower or the Canadian Borrower therefrom,
shall in any event be effective unless the same shall be in writing and signed
(or, in the case of the Collateral Documents, consented to) by the Required
Lenders, and then such waiver or consent shall be effective only in the specific
instance and for the specific purpose for which given; provided, however, that
                                                       --------  -------
(a) no amendment, waiver or consent shall, unless in writing and signed by all
of the Lenders, do any of the following at any time:  (i) waive any of the
conditions specified in Section 3.01 or, in the case of the initial extension of
credit hereunder, Section 3.02, (ii) change any of the provisions of this
Section or the definition of the term "Required Lenders" or any other provisions
of any Loan Document to the extent that such change changes the percentage of
(w) the Commitments, (x) the aggregate unpaid principal amount of the Advances,
(y) the aggregate Available Amount of outstanding Letters of Credit or (z) the
aggregate Face Amount of outstanding Bankers' Acceptances that, in each case,
shall be required for the Lenders or any of them to take any action hereunder,
(iii) release all or substantially all of the Collateral in any transaction or
series of related transactions, permit the creation, incurrence, assumption or
existence of any senior Lien on all or substantially all of the Collateral in
any transaction or series of related transactions to secure any Obligations
other than Obligations owing to the Secured Parties under the Loan Documents or
release all or substantially all the Subsidiary Guarantors from their
obligations under the Subsidiary Guaranties (or limit substantially all their
liability in respect thereof), as applicable (other than in accordance with the
Subsidiary Guaranties, as applicable), or (iv) amend this Section 8.01, (b) no
amendment, waiver or consent shall, unless in writing and signed by the Required
Lenders and each Lender that has a Commitment under the Term A Facility, the
Term B Facility, the Working Capital Facility, the Canadian Facility or the
Acquisition Facility if affected by such amendment, waiver or consent, (i)
increase the Commitments of such Lender or subject such Lender to any additional
obligations, (ii) reduce the principal of, or interest on, the Advances payable
to such Lender or any fees or other amounts payable hereunder to such Lender or
(iii) postpone any date fixed for any scheduled payment of principal of, or
interest on, the Advances payable to such Lender or any fees or other amounts
payable hereunder to such Lender, (c) no amendment, waiver or consent shall
change the allocation among the Facilities of any prepayment set forth in
Section 2.07, or the order of application of any such prepayment to the
remaining principal installments thereof, unless in writing and, with respect to
each Facility adversely affected thereby, signed by Lenders owed or holding at
least 51% of the aggregate principal amount of the Advances under such Facility
(plus, if such Facility is the Working Capital Facility, the Unused Working
Capital Commitments, or if such Facility is the Acquisition Facility, the Unused
Acquisition Commitments) outstanding at such time and (d) no amendment, waiver
or consent shall change the rights of the Term B Lenders to decline prepayments
as provided in Section 2.07(c), unless in writing and signed by Term B Lenders
holding at least 51% of the Term B Advances outstanding at such time; provided
                                                                      --------
further that no amendment, waiver or consent shall, unless in writing and signed
-------
by each Issuing Bank and the Swing Line Bank, as the case may be, in addition to
the Lenders required above to take such action, affect the rights or obligations
of the Issuing Banks or the Swing Line Bank, as the case may be, under this
<PAGE>

                                                                             125

Agreement; and provided further that no amendment, waiver or consent shall,
               -------- -------
unless in writing and signed by the Agent in addition to the Lenders required
above to take such action, affect the rights or duties of the Agent under this
Agreement.

          Upon any sale, lease, transfer or other disposition of any item of
real or personal property in accordance with the terms of the Loan Documents,
the Agent, Mortgagee, Grantee or Beneficiary (each as defined in the Mortgages),
as the case may be, will, at the Borrower's expense, execute and deliver to the
Borrower such documents as the Borrower shall reasonably request to evidence the
release of such item of real or personal property from the Collateral Documents.

          SECTION 8.02.  Notices, Etc.  All notices and other communications
                         ------------
provided for hereunder shall be in writing (including telegraphic or telecopy
communication) and mailed, telegraphed, telecopied or delivered, if to the
Parent Guarantor, BMAC Holdings, Inc., c/o Better Minerals & Aggregates Company,
Route 522 North, P.O. Box 187, Berkeley Springs, WV 25411; if to the Borrower,
Better Minerals & Aggregates Company, Route 522 North, P.O. Box 187, Berkeley
Springs, WV 25411; if to the Canadian Borrower, George F. Pettinos (Canada)
Limited, c/o Better Minerals & Aggregates Company, Route 522 North, P.O. Box
187, Berkeley Springs, WV 25411, Attention:  Chief Financial Officer/Treasurer,
telecopier number (304) 258-3500, with a copy to USS Holdings, Inc., c/o D.
George Harris & Associates, Inc., 399 Park Avenue, 32nd Floor, New York, NY
10022, Attention:  Treasurer, telecopier number (212) 207-6440; if to any
Initial Lender or the Initial Issuing Bank, at its Domestic Lending Office or
Canadian Domestic Lending Office, as applicable, specified opposite its name on
Schedule I hereto; if to any other Lender Party, at its Domestic Lending Office
or Canadian Domestic Lending Office, as applicable, specified in the Assignment
and Acceptance pursuant to which it became a Lender Party; and if to the Agent,
at its address at 499 Park Avenue, New York, New York 10022, Attention:
Structured Finance Group, telecopier number (212) 418-8269; or, as to each
party, at such other address as shall be designated by such party in a written
notice to the other parties.  All such notices and communications shall, when
mailed, telegraphed, telecopied or delivered, be effective when received by the
addressee, except that notices and communications to the Agent pursuant to
Article II, III or VII shall not be effective until received by the Agent.
Delivery by telecopier of an executed counterpart of any amendment or waiver of
any provision of this Agreement or the Notes or of any Exhibit hereto to be
executed and delivered hereunder shall be effective as delivery of a manually
executed counterpart thereof.

          SECTION 8.03.  No Waiver; Remedies.  No failure on the part of any
                         -------------------
Lender Party or the Agent to exercise, and no delay in exercising, any right
hereunder or under any Note shall operate as a waiver thereof; nor shall any
single or partial exercise of any such right preclude any other or further
exercise thereof or the exercise of any other right.  The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.
<PAGE>

                                                                             126

          SECTION 8.04.  Costs and Expenses.  (a)  The Borrower and the Canadian
                         ------------------
Borrower hereby agree to pay on demand (i) all reasonable out-of-pocket costs
and expenses of Chase Securities Inc., the Agent and the Sub-Agent in connection
with the preparation, execution, delivery, administration, modification and
amendment of the Loan Documents (including, without limitation, (A) all
reasonable due diligence, collateral review, syndication, transportation,
computer, duplication, appraisal, audit, insurance, consultant, search, filing
and recording fees and expenses and (B) the reasonable fees and expenses of
counsel for Chase Securities Inc., the Agent and the Sub-Agent with respect
thereto, with respect to advising Chase Securities Inc., the Agent or the Sub-
Agent as to its rights and responsibilities, or the perfection, protection or
preservation of rights or interests, under the Loan Documents (and with respect
to the Mortgages, the granting and recording of the Mortgages and the
administration thereof), with respect to negotiations with any Loan Party or
with other creditors of any Loan Party or any of its Subsidiaries arising out of
any Default or any events or circumstances that may give rise to a Default and
with respect to presenting claims in or otherwise participating in or monitoring
any bankruptcy, insolvency or other similar proceeding involving creditors'
rights generally and any proceeding ancillary thereto relating to any Loan Party
or any of its Subsidiaries) and (ii) all costs and expenses of the Agent, the
Sub-Agent and the Lender Parties in connection with the enforcement (upon and
during the continuance of an Event of Default) of the Loan Documents, whether in
any action, suit or litigation, any bankruptcy, insolvency or other similar
proceeding affecting creditors' rights generally relating to any Loan Party or
any of its Subsidiaries (including, without limitation, the reasonable fees and
expenses of counsel for the Agent, the Sub-Agent and each Lender Party with
respect thereto); provided that, in the case of fees and expenses of counsel for
                  --------
Chase Securities Inc., the Agent, the Sub-Agent and the Lender Parties, the
Borrower and the Canadian Borrower shall be obligated to pay only the fees and
expenses of a single counsel in any one jurisdiction as to which no conflict of
interest exists.

          (b)  The Borrower and the Canadian Borrower hereby agree to indemnify
and hold harmless the Agent, the Sub-Agent, each Lender Party and each of their
Affiliates and their officers, trustees, directors, employees, agents and
advisors (each, an "Indemnified Party") from and against any and all claims,
                    -----------------
damages, losses, liabilities and reasonable expenses (including, without
limitation, reasonable fees and expenses of counsel; provided that, in the case
                                                     --------
of fees and expenses of counsel for the Indemnified Parties, the Borrower and
the Canadian Borrower shall be obligated to pay only the fees and expenses of a
single counsel in any one jurisdiction) that may be incurred by or asserted or
awarded against any Indemnified Party, in each case arising out of or in
connection with or by reason of, or in connection with the preparation for a
defense of, any investigation, litigation or proceeding arising out of, related
to or in connection with (i) the Facilities, the actual or proposed use of the
proceeds of the Advances, the Bankers' Acceptances or the Letters of Credit, the
Loan Documents or any of the transactions contemplated thereby, including,
without limitation, any acquisition or proposed acquisition (including, without
limitation, any Permitted Acquisition and any of the other transactions
contemplated hereby) by the Borrower, the Canadian Borrower or any of their
Subsidiaries or (ii) the actual or alleged presence of Hazardous Materials on
any property of any Loan Party or
<PAGE>

                                                                             127

any of its Subsidiaries or any Environmental Action relating in any way to any
Loan Party or any of its Subsidiaries, in each case whether or not such
investigation, litigation or proceeding is brought by any Loan Party, its
directors, shareholders or creditors or an Indemnified Party or any Indemnified
Party is otherwise a party thereto and whether or not the transactions
contemplated hereby are consummated, except to the extent such claim, damage,
loss, liability or expense is found in a final, non-appealable judgment by a
court of competent jurisdiction to have resulted from such Indemnified Party's
gross negligence or willful misconduct; provided that neither the Borrower nor
                                        --------
the Canadian Borrower shall be liable for any waiver, release or settlement of
any litigation or proceeding entered into by any Indemnified Party without the
Borrower's or the Canadian Borrower's prior written consent, as applicable,
which shall not be unreasonably withheld and provided further that to the extent
                                             -------- -------
any such Indemnified Party shall be required to refund to the Borrower or the
Canadian Borrower any amount as a result of such judgment, the Agent or any
Lender Party, as the case may be, shall be responsible for the amount of any
such refund required to be made on behalf of each of its respective Affiliates
and their officers, directors, employees, agents and advisors. The Parent
Guarantor, the Borrower and the Canadian Borrower also agree not to assert any
claim against the Agent, the Sub-Agent, any Lender Party or any of their
Affiliates, or any of their respective officers, directors, employees, attorneys
and agents, on any theory of liability, for special, indirect, consequential or
punitive damages arising out of or otherwise relating to the Facilities, the
actual or proposed use of the proceeds of the Advances, the Bankers' Acceptances
or the Letters of Credit, the Loan Documents or any of the transactions
contemplated thereby or for any damages arising from the use by others of
information or other materials obtained through electronic, telecommunications
or other information transmission systems, except to the extent such damages
result from the gross negligence or wilful misconduct of the Agent, the Sub-
Agent, any Lender Party or any of their Affiliates.

          (c)  If any payment of principal of, or Conversion of, any Eurodollar
Rate Advance is made by the Borrower to or for the account of a Lender Party
other than on the last day of the Interest Period for such Advance, as a result
of a payment or Conversion pursuant to Section 2.10(b)(i) or 2.12(d), or
acceleration of the maturity of the Advances pursuant to Section 6.01 or for any
other reason, the Borrower shall, upon demand by such Lender Party (with a copy
of such demand to the Agent), pay to the Agent for the account of such Lender
Party any amounts required to compensate such Lender Party for any additional
losses, costs or expenses that it may reasonably incur as a result of such
payment, including, without limitation, any loss, cost or expense incurred by
reason of the liquidation or reemployment of deposits or other funds acquired by
any Lender Party to fund or maintain such Advance (but, in any event, excluding
any loss of profits and the Applicable Margin applicable to such Advances).

          (d)  If any Loan Party fails to pay when due any costs, expenses or
other amounts payable by it under any Loan Document, including, without
limitation, fees and expenses of counsel and indemnities, such amount may be
paid on behalf of such Loan Party by the Agent, the Sub-Agent or any Lender
Party, in its sole discretion.
<PAGE>

                                                                             128

          (e)  Without prejudice to the survival of any other agreement of any
Loan Party hereunder or under any other Loan Document, the agreements and
obligations of the Borrower contained in Sections 2.12 and 2.14 and this Section
8.04 shall survive the payment in full of principal, interest and all other
amounts payable hereunder and under any of the other Loan Documents.

          SECTION 8.05.  Right of Set-off.  Upon (a) the occurrence and during
                         ----------------
the continuance of any Event of Default and (b) the making of the request or the
granting of the consent specified by Section 6.01 to authorize the Agent to
declare the Advances due and payable pursuant to the provisions of Section 6.01,
each Lender Party and each of its respective Affiliates is hereby authorized at
any time and from time to time, to the fullest extent permitted by law, to set
off and otherwise apply any and all deposits (general or special, time or
demand, provisional or final) at any time held and other indebtedness at any
time owing by such Lender Party or such Affiliate to or for the credit or the
account of the Borrower or the Canadian Borrower, as the case may be, against
any and all of the Obligations of such Borrower or Canadian Borrower now or
hereafter existing under this Agreement and the Note or Notes (if any) held by
such Lender Party, irrespective of whether such Lender Party shall have made any
demand under this Agreement or such Note or Notes and although such obligations
may be unmatured.  Each Lender Party agrees promptly to notify the Borrower or
the Canadian Borrower, as the case may be, after any such set-off and
application; provided, however, that the failure to give such notice shall not
             --------  -------
affect the validity of such set-off and application.  The rights of each Lender
Party and its respective Affiliates under this Section are in addition to other
rights and remedies (including, without limitation, other rights of set-off)
that such Lender Party and its respective Affiliates may have.

          SECTION 8.06.  Binding Effect.  This Agreement shall become effective
                         --------------
when it shall have been executed by the Borrower, the Canadian Borrower and the
Agent and when the Agent shall have been notified by each Initial Lender and the
initial Issuing Bank hereunder that such Initial Lender and such initial Issuing
Bank has executed it and thereafter shall be binding upon and inure to the
benefit of the Borrower, the Agent and each Lender Party and their respective
successors and assigns, except that the Borrower shall not have the right to
assign its rights hereunder or any interest herein without the prior written
consent of the Lender Parties.

          SECTION 8.07.  Assignments and Participations.  (a)  Each Lender may
                         ------------------------------
assign to one or more Eligible Assignees all or a portion of its rights and
obligations under this Agreement (including, without limitation, all or a
portion of its Commitment or Commitments, the Advances owing to it and any Note
or Notes held by it); provided, however, that (i) each such assignment shall be
                      --------  -------
of a uniform, and not a varying, percentage of all rights and obligations under
and in respect of one or more Facilities, (ii) except in the case of an
assignment to a Person that, immediately prior to such assignment, was a Lender
or an Affiliate or Related Fund of a Lender or an assignment of all of a
Lender's rights and obligations under this Agreement, the aggregate
<PAGE>

                                                                             129

amount of the Commitments being assigned to such Eligible Assignee pursuant to
such assignment (determined as of the date of the Assignment and Acceptance with
respect to such assignment) shall in no event be less than $5,000,000 and shall
be in an integral multiple of $500,000, (iii) each such assignment shall be to
an Eligible Assignee, (iv) no such assignments shall be permitted without the
consent of the Agent and, in the case of any assignment to an Eligible Assignee
other than a Lender or an Affiliate or Related Fund of a Lender or a Federal
Reserve Bank and so long as no Event of Default has occurred and is continuing,
the Borrower (which consent shall not be unreasonably withheld), (v) no such
assignment shall be effective before the earlier of (A) October 30, 1999 and (B)
such time as Chase Securities Inc. shall have notified the Lender Parties, the
Borrower and the Canadian Borrower that syndication of the Commitments hereunder
has been completed, and (vi) the parties to each such assignment shall execute
and deliver to the Agent, for its acceptance and recording in the Register, an
Assignment and Acceptance, together with any Note or Notes, if any, subject to
such assignment and, except in the case of any assignment to a Lender, an
Affiliate of a Lender or a Related Fund of a Lender, a processing and
recordation fee of $2,500.

          (b) With the consent of the Borrower, which shall not be unreasonably
withheld, the Issuing Bank may assign to an Eligible Assignee all of its rights
and obligations under the undrawn portion of its Letter of Credit Commitment at
any time; provided, however, that (i) each such assignment shall be to an
          --------  -------
Eligible Assignee and (ii) the parties to each such assignment shall execute and
deliver to the Agent, for its acceptance and recording in the Register, an
Assignment and Acceptance, together with a processing and recordation fee of
$2,500.

          (c) Upon such execution, delivery, acceptance and recording, from and
after the effective date specified in such Assignment and Acceptance, (x) the
assignee thereunder shall be a party hereto and, to the extent that rights and
obligations hereunder have been assigned to it pursuant to such Assignment and
Acceptance, have the rights and obligations of a Lender or Issuing Bank, as the
case may be, hereunder and (y) the Lender or Issuing Bank assignor thereunder
shall, to the extent that rights and obligations hereunder have been assigned by
it pursuant to such Assignment and Acceptance, relinquish its rights and be
released from its obligations under this Agreement (and, in the case of an
Assignment and Acceptance covering all or the remaining portion of an assigning
Lender's or Issuing Bank's rights and obligations under this Agreement, such
Lender or Issuing Bank shall cease to be a party hereto).

          (d) By executing and delivering an Assignment and Acceptance, each
Lender Party assignor thereunder and each assignee thereunder confirm to and
agree with each other and the other parties thereto and hereto as follows:  (i)
other than as provided in such Assignment and Acceptance, such assigning Lender
Party makes no representation or warranty and assumes no responsibility with
respect to any statements, warranties or representations made in or in
connection with this Agreement or any other Loan Document or the execution,
legality, validity, enforceability, genuineness, sufficiency or value of, or the
perfection or priority of any lien or
<PAGE>

                                                                             130

security interest created or purported to be created under or in connection
with, this Agreement or any other Loan Document or any other instrument or
document furnished pursuant hereto or thereto; (ii) such assigning Lender Party
makes no representation or warranty and assumes no responsibility with respect
to the financial condition of the Borrower, the Canadian Borrower or any other
Loan Party or the performance or observance by any Loan Party of any of its
obligations under any Loan Document or any other instrument or document
furnished pursuant thereto; (iii) such assignee confirms that it has received a
copy of this Agreement, together with copies of the financial statements
referred to in Section 4.01 and such other documents and information as it has
deemed appropriate to make its own credit analysis and decision to enter into
such Assignment and Acceptance; (iv) such assignee will, independently and
without reliance upon the Agent, such assigning Lender Party or any other Lender
Party and based on such documents and information as it shall deem appropriate
at the time, continue to make its own credit decisions in taking or not taking
action under this Agreement; (v) such assignee confirms that it is an Eligible
Assignee; (vi) such assignee appoints and authorizes the Agent to take such
action as agent on its behalf and to exercise such powers and discretion under
the Loan Documents as are delegated to the Agent by the terms hereof, together
with such powers and discretion as are reasonably incidental thereto; and (vii)
such assignee agrees that it will perform in accordance with their terms all of
the obligations which by the terms of this Agreement are required to be
performed by it as a Lender or Issuing Bank, as the case may be.

          (e) The Agent shall maintain at its address referred to in Section
8.02 a copy of each Assignment and Acceptance delivered to and accepted by it
and a register for the recordation of the names and addresses of the Lender
Parties and the Commitment under each Facility of, and principal amount of the
Advances owing under each Facility to, each Lender Party from time to time (the
"Register").  The entries in the Register shall be conclusive and binding for
 --------
all purposes, absent manifest error, and the Borrower, the Canadian Borrower,
the Agent and the Lender Parties shall treat each Person whose name is recorded
in the Register as a Lender Party hereunder for all purposes of this Agreement.
The Register shall be available for inspection by the Borrower, the Canadian
Borrower or any Lender Party at any reasonable time and from time to time upon
reasonable prior notice.

          (f) Upon its receipt of an Assignment and Acceptance executed by an
assigning Lender Party and an assignee, together with any Note or Notes
requested by the Assignee subject to such assignment, the Agent shall, if such
Assignment and Acceptance has been completed and is in substantially the form of
Exhibit C hereto, (i) accept such Assignment and Acceptance, (ii) record the
information contained therein in the Register and (iii) give prompt notice
thereof to the Borrower.  No assignment shall be effective unless the Assignment
and Acceptance has been registered in the Register as provided in this Section
8.07(f).

          (g) Each Lender Party may sell participations in or to all or a
portion of its rights and obligations under this Agreement (including, without
limitation, all or a portion of its Commitments, the Advances owing to it and
any Note or Notes held by it) to any Person other
<PAGE>

                                                                             131

than any Loan Party or any of its Subsidiaries or Affiliates; provided,
                                                              --------
however, that (i) such Lender Party's obligations under this Agreement
-------
(including, without limitation, its Commitments) shall remain unchanged, (ii)
such Lender Party shall remain solely responsible to the other parties hereto
for the performance of such obligations, (iii) such Lender Party shall remain
the holder of such Advances and any such Note for all purposes of this
Agreement, (iv) the Borrower, the Canadian Borrower, the Agent and the other
Lender Parties shall continue to deal solely and directly with such Lender Party
in connection with such Lender Party's rights and obligations under this
Agreement, (v) no participant under any such participation shall have any right
to approve any amendment or waiver of any provision of any Loan Document, or any
consent to any departure by any Loan Party therefrom, except to the extent that
such amendment, waiver or consent would increase any Commitment subject to such
participation or subject such participant to any additional obligations, reduce
the principal of, or interest on, the Advances or any fees or other amounts
payable hereunder, in each case to the extent subject to such participation,
postpone any date fixed for any payment of principal of, or interest on, the
Advances or any fees or other amounts payable hereunder, in each case to the
extent subject to such participation, or release all or substantially all of the
Collateral and (vi) no participant under any such participation shall be
entitled to amounts otherwise payable to it with respect to its participations
under Sections 2.12, 2.14 or 8.04(c), unless such amount would have been payable
to the Lender Party that sold such participation if such participation had not
been sold.

          (h) Any Lender Party may, in connection with any assignment or
participation or proposed assignment or participation pursuant to this Section
8.07, disclose to the assignee or participant or proposed assignee or
participant, any information relating to the Borrower or the Canadian Borrower
furnished to such Lender Party by or on behalf of such Borrower or such Canadian
Borrower; provided, however, that, prior to any such disclosure, the assignee or
          --------  -------
participant or proposed assignee or participant shall agree to preserve the
confidentiality of any Confidential Information received by it from such Lender
Party.

          (i) Notwithstanding any other provision set forth in this Agreement,
any Lender Party may at any time create a security interest in all or any
portion of its rights under this Agreement (including, without limitation, the
Advances owing to it and any Note or Notes held by it) in favor of any Federal
Reserve Bank in accordance with Regulation A of the Board of Governors of the
Federal Reserve System, and any Lender Party that is a fund that invests in
commercial loans may, without the consent of the Borrower or the Agent, pledge
or assign all or any portion of its rights under this Agreement (including,
without limitation, the Advances owing to it and any Note or Notes held by it)
to any trustee or any other representative of holders of obligations owed or
securities issued by such fund as security for such obligations or securities,
provided that no such pledge or assignment shall release a Lender Party from any
--------
of its obligations hereunder, substitute any such pledgee or assignee for such
Lender Party as party hereto or increase the obligations of the Borrower
hereunder.
<PAGE>

                                                                             132

          SECTION 8.08.  Execution in Counterparts.  This Agreement may be
                         -------------------------
executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed shall be deemed to be an
original and all of which taken together shall constitute one and the same
agreement.  Delivery of an executed counterpart of a signature page to this
Agreement by telecopier shall be effective as delivery of a manually executed
counterpart of this Agreement.

          SECTION 8.09.  No Liability of the Issuing Bank.  The Borrower assumes
                         --------------------------------
all risks of the acts or omissions of any beneficiary or transferee of any
Letter of Credit with respect to its use of such Letter of Credit.  Neither the
Issuing Bank nor any of its officers or directors shall be liable or responsible
for:  (a) the use that may be made of any Letter of Credit or any acts or
omissions of any beneficiary or transferee in connection therewith; (b) the
validity, sufficiency or genuineness of documents, or of any endorsement
thereon, even if such documents should prove to be in any or all respects
invalid, fraudulent or forged; (c) payment by the Issuing Bank against
presentation of documents that do not strictly comply with the terms of a Letter
of Credit, including failure of any documents to bear any reference or adequate
reference to the Letter of Credit as long as any such documents shall
substantially so comply; or (d) any other similar circumstances whatsoever in
making or failing to make payment under any Letter of Credit, except that the
                                                              ------
Borrower shall have a claim against the Issuing Bank, and the Issuing Bank shall
be liable to the Borrower, to the extent of any direct, but not consequential,
damages suffered by the Borrower that the Borrower proves were caused by (i) the
Issuing Bank's willful misconduct or gross negligence in determining whether
documents presented under any Letter of Credit comply with the terms of the
Letter of Credit or (ii) the Issuing Bank's willful failure to make lawful
payment under a Letter of Credit after the presentation to it of a draft and
certificates strictly complying with the terms and conditions of the Letter of
Credit.  In furtherance and not in limitation of the foregoing, the Issuing Bank
may accept documents that appear on their face to be in order, without
responsibility for further investigation, regardless of any notice or
information to the contrary.

          SECTION 8.10.  Confidentiality.  Neither the Agent nor any Lender
                         ---------------
Party shall disclose any Confidential Information to any Person without the
consent of the Borrower, other than (a) (i) to the Agent's or such Lender
Party's Affiliates or any Related Fund of such Lender Party and their officers,
directors, employees, agents and advisors, (ii) in the case of any Lender Party
that is a fund that invests in commercial loans, to representatives of holders
of obligations owed or securities issued by such Lender Party or to ratings
agencies that rate the portfolio of such Lender Party and (iii) to actual or
prospective Eligible Assignees and participants, and in each case only on a
confidential basis, (b) as required by any law, rule or regulation or judicial
process and (c) as requested or required by any state, federal or foreign
authority or examiner regulating insurance companies, banks or banking
(including the National Association of Insurance Commissioners).
<PAGE>

                                                                             133

          SECTION 8.11.  Jurisdiction, Etc.  (a)  Each of the parties hereto
                         ------------------
hereby irrevocably and unconditionally submits, for itself and its property, to
the nonexclusive jurisdiction of any New York State court or federal court of
the United States of America sitting in New York City, and any appellate court
from any thereof, in any action or proceeding arising out of or relating to this
Agreement or any of the other Loan Documents to which it is a party, or for
recognition or enforcement of any judgment, and each of the parties hereto
hereby irrevocably and unconditionally agrees that all claims in respect of any
such action or proceeding may be heard and determined in any such New York State
court or, to the extent permitted by law, in such federal court.  The Canadian
Borrower hereby agrees that service of process in any such action or proceeding
brought in any such New York State court or in such federal court may be made
upon the Borrower at its address for notices as provided for in Section 8.02 and
the Canadian Borrower hereby irrevocably appoints the Borrower its authorized
agent to accept such service of process, and agrees that the failure of the
Borrower to give any notice of any such service shall not impair or affect the
validity of such service or of any judgment rendered in any action or proceeding
based thereon.  The Canadian Borrower hereby further irrevocably consents to the
service of process in any action or proceeding to such Canadian Borrower at its
address specified pursuant to Section 8.02.  Each of the parties hereto agrees
that a final judgment in any such action or proceeding shall be conclusive and
may be enforced in other jurisdictions by suit on the judgment or in any other
manner provided by law.  Nothing in this Agreement shall affect any right that
any party may otherwise have (x) to serve legal process in any other manner
permitted by law, or (y) to bring any action or proceeding relating to this
Agreement or any of the other Loan Documents in the courts of any jurisdiction.

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

          SECTION 8.12.  Judgment.  (a) To the extent permitted by applicable
                         --------
law, if for the purposes of obtaining judgment in any court it is necessary to
convert a sum due hereunder in U.S. Dollars into another currency, the parties
hereto agree, to the fullest extent that they may effectively do so, that the
rate of exchange used shall be that at which in accordance with normal banking
procedures the Agent could purchase U.S. Dollars with such other currency at
BNP's principal office in New York City at 11:00 A.M. (New York City) time on
the Business Day preceding that on which final judgment is given.

          (b) To the extent permitted by applicable law, if for the purposes of
obtaining judgment in any court it is necessary to convert a sum due hereunder
in a foreign currency into U.S. Dollars, the parties agree to the fullest extent
that they may effectively do so, that the rate of exchange used shall be that at
which in accordance with normal banking procedures the Agent
<PAGE>

                                                                             134

could purchase such foreign currency with U.S. Dollars at BNP's principal office
in BNP at 11:00 A.M. (New York City) time on the Business Day preceding that on
which final judgment is given.

          (c) To the extent permitted by applicable law, the obligation of the
Borrower or the Canadian Borrower in respect of any sum due in U.S. Dollars from
it to any Lender Party or the Agent hereunder shall, notwithstanding any
judgment in a currency other than U.S. Dollars, be discharged only to the extent
that on the Business Day following receipt by such Lender Party or the Agent (as
the case may be) of any sum adjudged to be so due in such other currency, such
Lender Party or the Agent (as the case may be) may in accordance with normal
banking procedures purchase U.S. Dollars with such other currency; if the U.S.
Dollars so purchased are less than such sum due to such Lender Party or the
Agent (as the case may be) in U.S. Dollars, such Borrower or such Canadian
Borrower, as the case may be, agrees, to the extent permitted by applicable law,
as a separate obligation and notwithstanding any such judgment, to indemnify
such Lender Party or the Agent (as the case may be) against such loss, and if
the U.S. Dollars so purchased exceed such sum due to any Lender Party or the
Agent (as the case may be) in U.S. Dollars, such Lender Party or the Agent (as
the case may be) agrees to remit to such Borrower or such Canadian Borrower, as
the case may be, such excess.

          SECTION 8.13.  Governing Law.  This Agreement and the Notes, if any,
                         -------------
shall be governed by, and construed in accordance with, the laws of the State of
New York.

          SECTION 8.14.  Waiver of Jury Trial.  Each of the Loan Parties, the
                         --------------------
Agent and the Lender Parties irrevocably waives all right to trial by jury in
any action, proceeding or counterclaim (whether based on contract, tort or
otherwise) arising out of or relating to any of the Loan Documents, the Advances
or the actions of the Agent or any Lender Party in the negotiation,
administration, performance or enforcement thereof.

          SECTION 8.15.  Power of Attorney.  The Canadian Borrower may from time
                         -----------------
to time authorize and appoint the Borrower as its attorney-in-fact to execute
and deliver (a) any amendment, waiver or consent in accordance with Section 8.01
on behalf of and in the name of the Canadian Borrower and (b) any notice or
other communication hereunder, on behalf of and in the name of the Canadian
Borrower.  Such authorization shall become effective as of the date on which the
Canadian Borrower delivers to the Agent a power of attorney enforceable under
applicable law and any additional information to the Agent as necessary to make
such power of attorney the legal, valid and binding obligation of the Canadian
Borrower.
<PAGE>

                                                                             135

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

                              BMAC HOLDINGS, INC.,
                              as Parent Guarantor

                              By /s/ Richard Nick
                                 ----------------------------------------
                                 Name:  Richard Nick
                                 Title: Vice President

                              BETTER MINERALS & AGGREGATES
                              COMPANY, as Borrower

                              By /s/ Richard Nick
                                 ----------------------------------------
                                 Name:  Richard Nick
                                 Title: Vice President

                              GEORGE F. PETTINOS (CANADA)
                              LIMITED, as Canadian Borrower

                              By /s/ Richard Nick
                                 ----------------------------------------
                                 Name:  Richard Nick
                                 Title: Vice Presiden

                              THE CHASE MANHATTAN BANK,

                              By /s/ Thomas H. Kozlark
                                 ----------------------------------------
                                 Name:  Thomas H. Kozlark
                                 Title: Vice President

<PAGE>

                                                                             136

                                        CHASE SECURITIES INC.,

                                        By /s/ Thomas H. Kozlark
                                           ------------------------------------
                                           Name:  Thomas H. Kozlark
                                           Title: Vice President
<PAGE>

                                        BANQUE NATIONALE DE PARIS,
                                        as Agent, Initial Lender,
                                        Swing Line Bank and Initial Issuing Bank

                                        By /s/ Richard Cushing
                                           -------------------------------------
                                           Name:  Richard Cushing
                                           Title: Director
<PAGE>

                                        By /s/ Paul Barnes
                                           -------------------------------------
                                           Name:  Paul Barnes
                                           Title: Assistant Vice President
<PAGE>

                                        BANQUE NATIONALE DE PARIS (CANADA),
                                        as Canadian Lender and Sub-Agent

                                        By /s/ Lee Chin Hock
                                           -------------------------------------
                                           Name:  Lee Chin Hock
                                           Title: Senior Vice President
                                                  General Manager
                                                  Ontario, Manitoba,
<PAGE>

                                        Saskatchewan

                                        By /s/ Don R. Lee
                                           -------------------------------------
                                           Name:  Don. R. Lee
                                           Title: Vice President
                                                  Corporate Banking
<PAGE>

                                        BANK AUSTRIA CREDITANSTALT
                                        CORPORATE FINANCE, INC.

                                        By: /s/ Clifford L. Wells
                                            ------------------------------------
                                            Name: Clifford L. Wells
                                            Title: Vice President

                                        By: /s/ William W. Hunter
                                            ------------------------------------
                                            Name:  William W. Hunter
                                            Title: Vice President
<PAGE>

                              MERRILL LYNCH SENIOR FLOATING RATE
                              FUND II, INC.

                              By:  /s/ Paul Travers
                                   --------------------------------------
                                   Name:  Paul Travers
                                   Title: Authorized Signatory

                              PRINCIPAL LIFE INSURANCE COMPANY

                              By:  Principal Capital Management LLC, a
                                   Delaware limited liability company, its
                                   authorized signatory

                              By:  /s/ Jon C. Heiny
                                   --------------------------------------
                                   Name:  Jon C. Heiny
                                   Title: Counsel

                              By:  /s/ Jody J. Lamberth
                                   --------------------------------------
                                   Name:  Jody J. Lamberth
                                   Title: Authorized Signatory

                              MORGAN STANLEY DEAN WITTER PRIME
                              INCOME TRUST

                              By:  /s/ Peter Gewirtz
                                   --------------------------------------
                                   Name:  Peter Gewirtz
                                   Title: Authorized Signatory

                              NATIONAL BANK OF CANADA

                              By:  /s/ Eric L. Moore
                                   --------------------------------------
                                   Name:  Eric L. Moore
                                   Title: Vice President
<PAGE>

                              By:  /s/ Donald P. Haddad
                                   --------------------------------------
                                   Name:  Donald P. Haddad
                                   Title: Vice President/Manager

                              FIRST SOURCE FINANCIAL LLP

                              By:  First Source Financial, Inc.,
                                   its Agent/Manager

                              By:  /s/ Pamela D. Eskin
                                   --------------------------------------
                                   Name:  Pamela D. Eskin
                                   Title: Vice President

                              BOEING CAPITAL CORPORATION

                              By:  /s/ James C. Hammersmith
                                   --------------------------------------
                                   Name:  James C. Hammersmith
                                   Title: Senior Documentation Officer

                              BANK POLSKA KASA OPIEKI S.A.
                              NEW YORK BRANCH

                              By:  /s/ Hussein El Tavzel
                                   --------------------------------------
                                   Name:  Hussein El Tavzel
                                   Title: Vice President
<PAGE>

                              THE TRAVELERS INSURANCE COMPANY

                              By:  /s/ Allen R. Cantrell
                                   ------------------------------------
                                   Name:  Allen R. Cantrell
                                   Title: Investment Officer

                              TRAVELERS CORPORATE LOAN FUND INC.

                              By:  Travelers Asset Management International
                                   Corporation

                              By:  /s/ Allen R. Cantrell
                                   ------------------------------------
                                   Name:  Allen R. Cantrell
                                   Title: Investment Officer

                              ABN AMRO BANK N.V.

                              By:  /s/ Louis K. McLinden, Jr.
                                   ------------------------------------
                                   Name:  Louis K. McLinden, Jr.
                                   Title: Vice President

                              By:  /s/ Gregory D. Amoroso
                                   ------------------------------------
                                   Name:  Gregory D. Amoroso
                                   Title: Senior Vice President

                              HELLER FINANCIAL, INC.

                              By:  /s/ Scott Ziemke
                                   ------------------------------------
                                   Name:  Scott Ziemke
                                   Title: Assistant Vice President

                              ARCHIMEDES FUNDING, L.L.C.

                              By:  ING Capital Advisors LLC,
<PAGE>

                                   as its Collateral Manager

                              By:  /s/ Helen Y. Rhee
                                   ---------------------------------------
                                   Name:  Helen Y. Rhee
                                   Title: Vice President and Portfolio Manager
<PAGE>

                              ARCHIMEDES FUNDING II, LTD.

                              By:  ING Capital Advisors LLC,

                                   as its Collateral Manager

                              By:  /s/ Helen Y. Rhee
                                   ---------------------------------------
                                   Name:  Helen Y. Rhee
                                   Title: Vice President and Portfolio Manager

                              KZH-ING-1 LLC

                              By:  /s/ Peter Chin
                                   ---------------------------------------
                                   Name:  Peter Chin
                                   Title: Authorized Agent

                              KZH-ING-2 LLC

                              By:  /s/ Peter Chin
                                   ---------------------------------------
                                   Name:  Peter Chin
                                   Title: Authorized Agent

                              BALANCED HIGH-YIELD FUND I LTD.

                              By:  BHF (USA) Capital Corporation,

                                   as Attorney-In-Fact

                              By:  /s/ John Zapalac
                                   ---------------------------------------
                                   Name:  John Zapalac
                                   Title: Associate

                              By:  /s/ Ralph Della Rocca
                                   ---------------------------------------
                                   Name:  Ralph Della Rocca
                                   Title: Assistant Vice President
<PAGE>

NATIONAL CITY BANK

By:  /s/ Wilmer J. Jacobs
     -----------------------------------------
     Name:  Wilmer J. Jacobs
     Title: Assistant Vice President

FIRST UNION NATIONAL BANK

By:  /s/ W. Garreth Horan
     -----------------------------------------
     Name:  W. Gareth Horan
     Title: Vice President

METROPOLITAN LIFE INSURANCE COMPANY

By:  /s/ James Dingler
     -----------------------------------------
     Name:  James Dingler
     Title: Director

FRANKLIN FLOATING RATE TRUST

By:  /s/ Chauncey Lufkin
     -----------------------------------------
     Name:  Chauncey Lufkin
     Title: Vice President

PPM SPYGLASS FUNDING TRUST

By:  /s/ Kelly C. Walker
     -------------------
     Name:  Kelly C. Walker
     Title: Authorized Agent<PAGE>

                                                                EXHIBIT 10.5

                                                                EXECUTION COPY

                              SECURITY AGREEMENT

                        Dated as of September 30, 1999

                                     From

                     BETTER MINERALS & AGGREGATES COMPANY,

                                      and

                    THE OTHER GRANTORS REFERRED TO HEREIN,

                                 as Grantors,
                                 -----------

                                      to

                          BANQUE NATIONALE DE PARIS,

                                   as Agent
                                   --------
<PAGE>

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

<TABLE>
<CAPTION>
                                                                                    Page
<S>                                                                                 <C>
SECTION 1.  Grant of Security......................................................    1

SECTION 2.  Security for Obligations...............................................    5

SECTION 3.  Grantors Remain Liable.................................................    6

SECTION 4.  Delivery and Control of Security Collateral and Account Collateral.....    6

SECTION 5.  Maintaining the L/C Cash Collateral Account............................    7

SECTION 6.  Maintaining the Blocked Accounts.......................................    7

SECTION 7.  Investing of Amounts in the L/C Cash Collateral Account................    8

SECTION 8.  Representations and Warranties.........................................    8

SECTION 9.  Further Assurances.....................................................    9

SECTION 10. As to Equipment and Inventory..........................................   10

SECTION 11. Insurance..............................................................   11

SECTION 12. Place of Perfection; Records; Collection of Receivables................   11

SECTION 13. Voting Rights; Dividends; Etc..........................................   12

SECTION 14. As to the Assigned Agreements..........................................   13

SECTION 15. Transfers and Other Liens; Additional Shares...........................   13

SECTION 16. Agent Appointed Attorney-in-Fact.......................................   14

SECTION 17. Agent May Perform......................................................   14

SECTION 18. The Agent's Duties.....................................................   14

SECTION 19. Remedies...............................................................   15

SECTION 20. Registration Rights....................................................   16
</TABLE>

                                      i
<PAGE>

<TABLE>
<S>                                                                                        <C>
SECTION 21. Indemnity and Expenses......................................................   17

SECTION 22. Security Interest Absolute..................................................   17

SECTION 23. Amendments; Waivers; Etc....................................................   17

SECTION 24. Addresses for Notices.......................................................   18

SECTION 25. Continuing Security Interest; Assignments Under the Credit Agreement........   18

SECTION 26. Release and Termination.....................................................   18

SECTION 27. Mortgages...................................................................   19

SECTION 28. Execution in Counterparts...................................................   19

SECTION 29. Governing Law...............................................................   19
</TABLE>
                                      ii
<PAGE>

                                   SCHEDULES

<TABLE>
<S>                                                      <C>
Schedule I    -  ......................................          Pledged Shares, Pledged Debt
Schedule II   -  ......................................                   Assigned Agreements
Schedule III  -  ......................................  Locations of Equipment and Inventory
Schedule IV   -  ......................................                      Blocked Accounts
Schedule V    -  ......................................                           Trade Names
</TABLE>

                                   EXHIBITS

Exhibit A     -  Form of Blocked Account Letter
Exhibit B     -  Security Agreement Supplement

                                      iii
<PAGE>

                              SECURITY AGREEMENT

          SECURITY AGREEMENT, dated as of September 30, 1999, made by Better
Minerals & Aggregates Company, a Delaware corporation formerly known as "USS
Intermediate Holdco, Inc." (the "Borrower"), and each other grantor listed on
the signature pages hereof (together with the Borrower, the "Grantors" and,
                                                             --------
individually, a "Grantor"), to Banque Nationale de Paris ("BNP"), as agent
                 -------                                   ---
(together with any successor agent appointed pursuant to Article VII of the
Credit Agreement (as defined below), the "Agent") for the Secured Parties (as
                                          -----
defined in the Credit Agreement).

          PRELIMINARY STATEMENTS:

          (1)  The Borrower, BMAC Holdings, Inc., a Delaware corporation, and
George F. Pettinos (Canada) Limited, a corporation organized and existing under
the laws of Ontario, Canada (the "Canadian Borrower"), have entered into a
                                  -----------------
Credit Agreement dated as of September 30, 1999 (said Agreement, as it may
hereafter be amended, supplemented or otherwise modified from time to time,
being the "Credit Agreement"; the terms defined therein and not otherwise
           ----------------
defined herein being used herein as therein defined) with certain Lender Parties
party thereto and Banque Nationale de Paris, as agent for such Lender Parties.

          (2)  Each Grantor is the owner of the shares of stock or other
ownership interests set forth opposite such Grantor's name and as otherwise
described in Part A of Schedule I hereto and issued by the corporations or other
entities indicated therein (collectively, the "Existing Pledged Shares"), the
                                               -----------------------
indebtedness (whether or not evidenced by instruments) set forth opposite such
Grantor's name and as otherwise described in Part B of Schedule I hereto and
issued by the obligors indicated therein (collectively, the "Existing Pledged
                                                             ----------------
Debt").
----

          (3)  The Borrower has opened a non-interest bearing cash collateral
account (the "L/C Cash Collateral Account") with BNP at its offices at 499 Park
              ---------------------------
Avenue, New York, New York 10022, Account No. 200875-001-77, in the name of the
Borrower but under the sole control and dominion of the Agent and subject to the
terms of this Agreement.

          (4)  It is a condition precedent to the making of Advances and
Drawings and the issuance of Letters of Credit by the Lender Parties and the
entry by the Hedge Banks into the Bank Hedge Agreements with the Borrower under
the Credit Agreement that the Grantors shall have executed and delivered this
Agreement.
<PAGE>

          (5)  Unless otherwise defined in this Agreement or in the Credit
Agreement, terms defined in Article 8 or 9 of the Uniform Commercial Code in
effect in the State of New York ("N.Y. Uniform Commercial Code") are used in
                                  ----------------------------
this Agreement as such terms are defined in such Article 8 or 9.

          NOW, THEREFORE, in consideration of the premises and in order to
induce the Lender Parties to make Advances and Drawings and to issue Letters of
Credit under the Credit Agreement and to induce the Hedge Banks to enter into
Bank Hedge Agreements with the Borrower from time to time, the Grantors hereby
agree with the Agent for the ratable benefit of the Secured Parties as follows:

          SECTION 1.  Grant of Security.  Each of the Grantors hereby assigns
                      -----------------
and pledges to the Agent for its benefit and the ratable benefit of the other
Secured Parties, and hereby grants to the Agent for its benefit and the ratable
benefit of the other Secured Parties, a lien on and security interest in the
following, in each case, as to each type of property described below, whether
now owned or hereafter acquired by such Grantor, wherever located and whether
now or hereafter existing (collectively, the "Collateral"; provided, however,
                                              ----------   --------  -------
there shall be excluded from Collateral, any Margin Stock (as such term is
defined in Regulation U of the Board of Governors of the Federal Reserve System)
held by any Grantor):

          (a)  all of such Grantor's right, title and interest in and to all
     equipment in all of its forms (including, without limitation, dredges,
     dozers, loaders, forklift trucks, crushing equipment, rod mills, grinding
     mills, hydrosizers, air sizers, dust collectors, automated packaging
     equipment and bulk storage silos, but excluding any motor vehicle covered
     by a certificate of title and a 1979 Beechcraft King Air C90), all fixtures
     and all parts thereof and all accessions and additions thereto, parts and
     appurtenances thereof, substitutions therefor and replacements thereof (any
     and all such equipment, fixtures, parts, accessions, additions,
     appurtenances, substitutions and replacements being the "Equipment");
                                                              ---------

          (b)  all of such Grantor's right, title and interest in and to all
     inventory (including, without limitation, silica sand, kaolin and aplite)
     in all of its forms (including, without limitation, (i) all raw materials,
     work in process therefor, parts, components, assemblies, supplies,
     materials, finished products and other goods and materials used or consumed
     in the manufacture or production thereof (including, without limitation,
     all wrapping, packaging, advertising, shipping materials, labels and other
     devices, names or marks affixed or to be affixed thereto for purposes of
     selling or of identifying the same or the seller or manufacturer thereof
     owned, consumed, used or held for use or sale, directly or indirectly, by,
     or on behalf of, or for the account of, such Grantor), (ii) goods in which
     such Grantor has an interest in mass or a joint or other interest or right
     of any kind (including, without limitation, goods in which such Grantor has
     an interest or right as consignee) and (iii) goods that are returned to or
     repossessed or stopped in transit by such Grantor) and all accessions
     thereto and products thereof and documents therefor (any and all such
     inventory, accessions, products and documents being the "Inventory");
                                                              ---------
<PAGE>

          (c)  all of such Grantor's right, title and interest in and to all
     accounts, contract rights, chattel paper, instruments, deposit accounts and
     general intangibles and all other rights and obligations of any kind,
     whether or not arising out of or in connection with the sale or lease of
     goods or the rendering of services, and all rights now or hereafter
     existing in and to all security agreements, leases and other contracts
     securing or otherwise relating to any such accounts, contract rights,
     chattel paper, instruments, deposit accounts, general intangibles, rights
     or obligations; provided, however, that in connection with any operating
                     --------  -------
     leases or other commercial agreements entered into in the ordinary course
     of business of such Grantor on a basis consistent with past practice, such
     grant shall only be effective to the extent the grant by such Grantor of a
     security interest in any such operating lease or other commercial agreement
     is not prohibited by such operating lease or other commercial agreement
     without the consent of any other party thereto or would not give any other
     party to such operating lease or other commercial agreement the right to
     terminate its obligations thereunder (any and all such accounts, contract
     rights, chattel paper, instruments, deposit accounts, general intangibles,
     rights and obligations, to the extent not referred to in clause (d), (e),
     (f) or (g) of this Section 1, being the "Receivables", and any and all such
                                              -----------
     leases, security agreements and other contracts to the extent not referred
     to in clause (e) of this Section 1, being the "Related Contracts");
                                                    -----------------

          (d)  all of such Grantor's right, title and interest in and to all of
     the following (collectively, the "Security Collateral"):
                                       -------------------

               (i)   the Existing Pledged Shares, together with the certificates
          representing such Existing Pledged Shares, and all dividends, cash,
          instruments and other property from time to time received, receivable
          or otherwise distributed in respect of or in exchange for any or all
          of such Existing Pledged Shares;

               (ii)  the Existing Pledged Debt, together with the instruments
          evidencing such Existing Pledged Debt, all security therefor and all
          interest, cash, instruments and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of such Existing Pledged Debt;

               (iii) all security entitlements from time to time carried in any
          securities account, and all dividends, interest, cash, instruments and
          other property from time to time received, receivable or otherwise
          distributed in respect of or in exchange for any or all of such
          security entitlements;

                (iv) all securities accounts, all security entitlements from
          time to time carried in the securities accounts, and all dividends,
          interest, cash, instruments and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of such security entitlements;

                (v)  all commodity contracts from time to time carried in any
          commodities account and all value, cash, instruments and other
          property from

                                       3
<PAGE>

          time to time received, receivable or otherwise distributed in respect
          of or in exchange for any or all of such commodity contracts;

               (vi)   all commodities accounts, all commodity contracts from
          time to time carried in the commodities accounts and all value, cash,
          instruments and other property from time to time received, receivable
          or otherwise distributed in respect of or in exchange for any or all
          of such commodity contracts;

               (vii)  all additional shares of stock of any issuer of any
          Existing Pledged Shares or of any other Person and all membership
          interests or other equity interests in any Person, from time to time
          acquired by the Grantors in any manner (with the exception of (i)
          partnership interests described in Section 5.02(f)(x) of the Credit
          Agreement, (ii) membership interests or other equity interests to the
          extent the underlying partnership or other agreement prohibits
          assignment and (iii) the shares of stock issued by any direct, non-
          Domestic Subsidiary of any Grantor to the extent the amount of such
          shares of stock exceeds 65% of the issued and outstanding shares of
          such non-Domestic Subsidiary), together with the certificates
          representing such additional shares, membership interests or other
          equity interests and all dividends, cash, instruments and other
          property from time to time received, receivable or otherwise
          distributed in respect of or in exchange for any or all of such
          shares, membership interests and other equity interests (together with
          the Existing Pledged Shares, the "Pledged Shares");
                                            --------------

               (viii) all additional indebtedness from time to time owed to the
          Grantors (other than loans and advances to employees permitted in the
          Loan Documents) by any obligor of the Existing Pledged Debt or any
          other Person (whether or not evidenced by instruments) and the
          instruments, if any, evidencing such indebtedness, all security
          therefor and all interest, cash, instruments and other property from
          time to time received, receivable or otherwise distributed in respect
          of or in exchange for any or all such indebtedness (together with the
          Existing Pledged Debt, the "Pledged Debt"); and
                                      ------------

               (ix)   all additional investment property (including, without
          limitation, all (A) securities, whether certificated or
          uncertificated, (B) security entitlements, as defined in Section 8-
          102(a)(17) of the N.Y. Uniform Commercial Code or, in the case of any
          U.S. Treasury book-entry securities, as defined in 31 C.F.R. Section
          357.2, or, in the case of any U.S. federal agency book-entry
          securities, as defined in the corresponding U.S. federal regulations
          governing such book-entry securities, (C) securities accounts, (D)
          commodity contracts and (E) commodity accounts) in which such Grantor
          has or acquires from time to time any right, title or interest in any
          manner, and the certificates or instruments, if any, representing or
          evidencing such investment property, and all dividends, interest,
          distributions, value, cash, instruments and other property from time
          to time received, receivable or otherwise distributed in respect of or
          in exchange for any or all of such investment property;

                                       4
<PAGE>

          (e)  all of such Grantor's right, title and interest in and to each
     Hedge Agreement to which such Grantor is now or may hereafter become a
     party and each other agreement listed on Schedule II hereto, in each case
     as such Hedge Agreement or other agreement may be amended, supplemented or
     otherwise modified from time to time (collectively, the "Assigned
                                                              --------
     Agreements"), including, without limitation, (i) all rights of such Grantor
     ----------
     to receive moneys due and to become due under or pursuant to the Assigned
     Agreements, (ii) all rights of such Grantor to receive proceeds with
     respect to the Assigned Agreements or any instruments, opinions or
     documents delivered pursuant thereto, (iii) all rights of such Grantor in
     and to all mortgages, security agreements, leases or other contracts
     securing or otherwise relating to the Assigned Agreements, (iv) all claims
     of such Grantor for damages arising out of or for breach of or default
     under the Assigned Agreements and (v) all rights of such Grantor to
     terminate any Assigned Agreement, to perform thereunder and to compel
     performance and otherwise exercise all remedies thereunder; provided,
                                                                 --------
     however, that in connection with any Assigned Agreement entered into in the
     -------
     ordinary course of business of such Grantor on a basis consistent with past
     practice, such grant shall only be effective to the extent (i) the grant by
     such Grantor of a security interest in any such Assigned Agreement is not
     prohibited by such Assigned Agreement without the consent of any other
     party thereto or would not give any other party to such Assigned Agreement
     the right to terminate its obligations thereunder or (ii) in the event that
     such grant is prohibited by such Assigned Agreement without the consent of
     such other party or would give such other party such right to terminate,
     such Grantor shall have obtained the consent of such other party to such
     grant, such Grantor hereby agreeing to use commercially reasonable efforts
     to obtain such consent (all such Collateral being the "Agreement
                                                            ---------
     Collateral");
     ----------

          (f)  all of such Grantor's right, title and interest in and to all of
     the following (collectively, the "Account Collateral"):
                                       ------------------

               (i)   the L/C Cash Collateral Account, all funds held therein and
          all certificates and instruments, if any, from time to time
          representing or evidencing the L/C Cash Collateral Account;

               (ii)  all Blocked Accounts (as hereinafter defined), all funds
          held therein and all certificates and instruments, if any, from time
          to time representing or evidencing the Blocked Accounts;

               (iii) all other deposit accounts of such Grantor, all funds held
          therein and all certificates and instruments, if any, from time to
          time representing or evidencing such deposit accounts;

               (iv)  all Collateral Investments (as hereinafter defined) from
          time to time and all certificates and instruments, if any, from time
          to time representing or evidencing the Collateral Investments;

                                       5
<PAGE>

               (v)  all notes, certificates of deposit, deposit accounts, checks
          and other instruments from time to time hereafter delivered to or
          otherwise possessed or required to be delivered to or otherwise
          possessed, by the Agent for or on behalf of such Grantor, including,
          without limitation, those delivered to or possessed in substitution
          for or in addition to any or all of the then existing Account
          Collateral; and

               (vi) all interest, dividends, distributions, cash, instruments
          and other property from time to time received, receivable or otherwise
          distributed in respect of or in exchange for any or all of the then
          existing Account Collateral;

          (g)  all of such Grantor's right, title and interest in and to all
     general intangibles of such Grantor (other than general intangibles for
     money due or to become due and described in clause (c) of this Section 1)
     including, without limitation, all trademarks, trade names, trade styles,
     trade secrets, service marks, logos, copyrights, patents, patent
     applications and all licenses, license applications, registrations and good
     will relating to or associated with any of the foregoing; provided,
                                                               --------
     however, that in connection with any operating leases or other commercial
     -------
     agreements entered into in the ordinary course of business of such Grantor
     on a basis consistent with past practice, such grant shall only be
     effective to the extent the grant by such Grantor of a security interest in
     any such operating lease or other commercial agreement is not prohibited by
     such operating lease or other commercial agreement without the consent of
     any other party thereto or would not give any other party to such operating
     lease or other commercial agreement the right to terminate its obligations
     thereunder; and

          (h)  all proceeds of any and all of the foregoing Collateral
     (including, without limitation, proceeds that constitute property of the
     types described in clauses (a) through (g) of this Section 1) and, to the
     extent not otherwise included, all (i) payments under insurance (whether or
     not the Agent is the loss payee thereof), or any indemnity, warranty or
     guaranty, payable by reason of loss or damage to or otherwise with respect
     to any of the foregoing Collateral and (ii) cash.

provided, however, that any or all of the property described in clauses (a)
through (h) located in the State of Alabama shall not constitute Collateral
unless so requested by the Agent under Section 5.01 of the Credit Agreement,
provided that such exclusion shall not be deemed to limit any of the Agent's or
the other Secured Parties' rights or interests in any such property arising
under any mortgage executed by any of the Grantors in favor of the Agent and/or
the Secured Parties and filed for record in Alabama.

          SECTION 2.  Security for Obligations.  This Agreement secures the
                      ------------------------
payment of all Obligations of the Grantors now or hereafter existing under or in
respect of the Loan Documents, whether direct or indirect, absolute or
contingent, including, without limitation, any extensions, modifications,
substitutions, amendments and renewals thereof, whether for principal,
reimbursement obligations, interest, premiums, penalties, fees,
indemnifications, contract causes of action, costs, expenses or otherwise (all
such Obligations secured hereby being

                                       6
<PAGE>

the "Secured Obligations"). Without limiting the generality of the foregoing,
     -------------------
this Agreement secures the payment of all amounts that constitute part of the
Secured Obligations and that would be owed by any Grantor to the Agent, or any
of the other Secured Parties under the Loan Documents but for the fact that such
Secured Obligations are unenforceable or not allowable due to the existence of a
bankruptcy, reorganization or similar proceeding involving such Grantor.

          SECTION 3.  Grantors Remain Liable.  Anything contained herein to the
                      ----------------------
contrary notwithstanding, (a) each of the Grantors shall remain liable under the
contracts and agreements included in the Collateral to which it is a party to
the extent set forth therein to perform all of its duties and obligations
thereunder to the same extent as if this Agreement had not been executed, (b)
the exercise by the Agent of any of its rights hereunder shall not release any
Grantor from any of its duties or obligations under the contracts and agreements
included in the Collateral to which it is a party and (c) neither of the Agent
nor any of the other Secured Parties shall have any obligation or liability
under the contracts and agreements included in the Collateral by reason of this
Agreement or any other Loan Document, nor shall any of the Secured Parties be
obligated to perform any of the obligations or duties of the Grantors thereunder
or to take any action to collect or enforce any claim for payment assigned
hereunder.

          SECTION 4.  Delivery and Control of Security Collateral and Account
                      -------------------------------------------------------
Collateral.  (a)  Subject to Section 9 hereof, all certificates or instruments
----------
representing or evidencing Security Collateral or Account Collateral shall be
delivered to and held by or on behalf of the Agent pursuant hereto and shall be
in suitable form for transfer by delivery, or shall be accompanied by duly
executed instruments of transfer or assignment in blank, all in form and
substance satisfactory to the Agent.  Upon the occurrence and during the
continuance of an Event of Default under the Credit Agreement, the Agent shall
have the right, at any time in its discretion and without notice to the
Grantors, to transfer to or register in the name of the Agent or any of its
nominees any or all of the Security Collateral and the Account Collateral,
subject only to the revocable rights specified in Section 13(a) and shall have
the right at any time to exchange certificates or instruments representing or
evidencing Security Collateral or Account Collateral for certificates or
instruments of smaller or larger denominations.

          (b)  With respect to any Security Collateral that constitutes a
security and is not represented or evidenced by a certificate or an instrument,
the Grantors shall cause the issuer thereof either (i) to register the Agent as
the registered owner of such security or (ii) to agree in writing with the
Grantors and the Agent that such issuer will comply with instructions with
respect to such security originated by the Agent without further consent of the
Grantors, such agreement to be in form and substance satisfactory to the Agent.

          (c)  With respect to any Security Collateral that constitutes a
security entitlement, each of the Grantors shall, within 15 days of the Agent's
request therefor, cause the securities intermediary with respect to such
security entitlement either (i) to identify in its records the Agent as having
such security entitlement against such securities intermediary or (ii) to agree
in writing with such Grantor and the Agent that such securities intermediary
will comply with entitlement orders (that is, notifications communicated to such
securities intermediary directing transfer or redemption of the financial asset
to which the Grantors has a security entitlement)

                                       7
<PAGE>

originated by the Agent without further consent of the Grantors, such agreement
to be in form and substance satisfactory to the Agent.

          (d)  With respect to any Security Collateral that constitutes a
commodity contract, each Grantor shall, within 15 days of the Agent's request
therefor, cause the commodity intermediary with respect to such commodity
contract to agree in writing with such Grantor and the Agent that such commodity
intermediary will apply any value distributed on account of such commodity
contract as directed by the Agent without further consent of the Grantors, such
agreement to be in form and substance satisfactory to the Agent.

          (e)  With respect to any Security Collateral that constitutes a
securities account or a commodity account, each Grantor will, in the case of a
securities account, comply with subsection (c) of this Section 4 with respect to
all security entitlements carried in such securities account and, in the case of
a commodity account, comply with subsection (d) of this Section 4 with respect
to all commodity contracts carried in such commodity account.

          SECTION 5.  Maintaining the L/C Cash Collateral Account.  So long as
                      -------------------------------------------
any Advance shall remain unpaid, any Letter of Credit, Bankers' Acceptance or
Bank Hedge Agreement shall be outstanding or any Lender Party shall have any
Commitment under the Credit Agreement:

          (a)  The Borrower shall maintain the L/C Cash Collateral Account with
     the Agent.

          (b)  It shall be a term and condition of the L/C Cash Collateral
     Account, notwithstanding any term or condition to the contrary in any other
     agreement relating to the L/C Cash Collateral Account, as the case may be,
     and except as otherwise provided by the provisions of Section 21, that no
     amount (including, without limitation, interest on Collateral Investments)
     shall be paid or released to or for the account of, or withdrawn by or for
     the account of, the Borrower or any other Person from the L/C Cash
     Collateral Account.

The L/C Cash Collateral Account shall be subject to such applicable laws, and
such applicable regulations of the Board of Governors of the Federal Reserve
System and of any other appropriate banking or governmental authority, as may
now or hereafter be in effect.

                                       8
<PAGE>

          SECTION 6.  Maintaining the Blocked Accounts.  So long as any Advance
                      --------------------------------
shall remain unpaid or any Letter of Credit, Bankers' Acceptance or Bank Hedge
Agreement shall be outstanding or any Lender Party shall have any Commitment
under the Credit Agreement:

          (a)  The Borrower shall maintain blocked deposit accounts ("Blocked
                                                                      -------
     Accounts") only with banks ("Blocked Account Banks") that have entered into
     --------                     ---------------------
     letter agreements in substantially the form of Exhibit A (or such other
     form as the Agent shall agree) with such Grantor and the Agent ("Blocked
                                                                      -------
     Account Letters").  As of the date hereof, the Borrower shall have
     ---------------
     delivered each Blocked Account Letter to the Agent, duly executed by the
     Borrower, the Agent and the Blocked Account Bank party thereto.

          (b)  Each Grantor shall immediately instruct each Person obligated at
     any time to make any payment to such Grantor for any reason in respect of
     Receivables (an "Obligor") to make such payment to a Blocked Account and,
                      -------
     if (i) an Event of Default shall have occurred and be continuing and (ii)
     either the making of the request or the granting of the consent specified
     by Section 6.01 of the Credit Agreement to authorize the Agent to declare
     the Advances due and payable pursuant to the provisions of such Section
     6.01 or the making of any demand by the Agent pursuant to Section 6.02 of
     the Credit Agreement requiring the Borrower to pay amounts in respect of
     Letters of Credit or the Canadian Borrower to pay amounts in respect of
     Bankers' Acceptances shall have occurred, shall, at the request of the
     Agent, pay to the Agent for application as provided by the terms of the
     Credit Agreement, at the end of each Business Day, all proceeds of
     Collateral.  So long as an Event of Default shall not have occurred and be
     continuing and the Agent shall not have given the notice referred to in the
     immediately preceding sentence, the Borrower may operate its Blocked
     Accounts in accordance with its past business practices.

          (c)  Upon any termination of any Blocked Account Letter or other
     agreement with respect to the maintenance of a Blocked Account by the
     Borrower or any Blocked Account Bank, the applicable Grantor shall
     immediately notify all Obligors that were making payments to such Blocked
     Account to make all future payments to another Blocked Account.  The
     Borrowers agrees to terminate any or all Blocked Accounts and Blocked
     Account Letters upon reasonable request of the Agent.

          SECTION 7.  Investing of Amounts in the L/C Cash Collateral Account.
                      -------------------------------------------------------
If requested by the Borrower, the Agent shall, subject to the provisions of
Section 21, from time to time invest:

          (a)  amounts on deposit in the L/C Cash Collateral Account in such
     Cash Equivalents in the name of the Agent as the Borrower may select and
     the Agent may approve, which approval shall not be unreasonably withheld;
     and

          (b)  interest paid on the Cash Equivalents referred to in clause (a)
     above, and reinvest other proceeds of any such Cash Equivalents that may
     mature or be sold, in each case in such Cash Equivalents in the name of the
     Agent as the Borrower may select and

                                       9
<PAGE>

     the Agent may approve, which approval shall not unreasonably withheld (the
     Cash Equivalents referred to in clause (a) above and in this clause (b)
     being, collectively, "Collateral Investments").
                           ----------------------

Interest and proceeds that are not invested or reinvested in Collateral
Investments as provided above shall be deposited and held in the L/C Cash
Collateral Account.

          SECTION 8.  Representations and Warranties.  The Grantors represent
                      ------------------------------
and warrant as follows:

          (a) On the date hereof all of the Equipment and Inventory is located
     at the places specified beneath the Grantors' names on Schedule III hereto.
     The principal places of business and chief executive offices of the
     Grantors and the offices where the Grantors keep their records concerning
     the Receivables and all originals of all chattel paper that evidence
     Receivables, are, as of the date hereof,  located at the addresses listed
     on Schedule V hereto.  A complete copy of each Assigned Agreement has been
     delivered to the Agent.  None of the Receivables or Agreement Collateral is
     evidenced by a promissory note or other instrument other than those which
     have been delivered to the Agent and others held by the Grantors pursuant
     to Section 9 hereof.

          (b) Each Grantor is the legal and beneficial owner of its Collateral
     free and clear of any Lien, except for the Liens permitted in the Loan
     Documents.  No effective financing statement or other instrument similar in
     effect covering all or any part of the Collateral is on file in any
     recording office, except such as may have been filed in favor of the Agent
     relating to this Agreement, or as permitted in the Loan Documents.

          (c) Set forth on Schedule V hereto is a complete and accurate list as
     of the date hereof of all names under which the Grantors are doing
     business, including, without limitation, trade names, division names and
     fictitious names.

          (d) Except to the extent located on or in leased property or subject
     to operating leases, the Grantors have exclusive possession and control of
     the Equipment and Inventory other than Equipment and Inventory which in the
     ordinary course of business is not in the possession and control of the
     Grantors, the aggregate amount of which does not exceed $1,000,000.

          (e) All of the shares of stock that constitute Pledged Shares have
     been duly authorized and validly issued and are fully paid and non-
     assessable.  The Pledged Debt held by the Grantors has been duly
     authorized, authenticated or issued and delivered, is the legal, valid and
     binding obligation of the issuers thereof and is not in default.

          (f) As of the date hereof the Pledged Shares constitute the percentage
     of the issued and outstanding shares of stock of the issuers thereof
     indicated on Part A of Schedule I hereto.  The Pledged Debt constitutes all
     of the outstanding indebtedness owed to the Grantors by the issuers
     thereof.

                                       10
<PAGE>

          (g) The Grantors have no Blocked Accounts or other deposit accounts
     other than the Blocked Accounts listed on Schedule IV hereto.

          (h) Except to the extent set forth on Schedule 4.01(d) to the Credit
     Agreement, all filings and other actions necessary or desirable to perfect
     and preserve the security interest in all material respects in the
     Collateral taken as a whole created under this Agreement have been duly
     made or taken, and this Agreement, the pledge of the Security Collateral
     pursuant hereto and the pledge and assignment of the Account Collateral
     pursuant hereto, together with such filings and other actions, create a
     valid and perfected security interest in all material respects in the
     Collateral taken as a whole, securing the payment of the Secured
     Obligations subject in priority only to the liens and security interests
     permitted in the Loan Documents.

          (i) Except to the extent set forth on Schedule 4.01(d) to the Credit
     Agreement, no consent of any other Person and no authorization, approval or
     other action by, and no notice to or filing with, any governmental
     authority or regulatory body or other third party is required (i) for the
     grant by the Grantors of the assignment and security interest granted
     hereunder, for the pledge by the Grantors of the Security Collateral
     pursuant hereto or for the execution, delivery or performance of this
     Agreement by the Grantors, (ii) for the perfection or maintenance of the
     pledge, assignment and security interest created hereunder (including the
     first priority nature of such pledge, assignment or security interest
     subject only to the liens and security interests permitted in the Loan
     Documents) in all material respects, except for the filing of financing and
     continuation statements under the Uniform Commercial Code, or (iii) for the
     exercise by the Agent of its voting or other rights provided for in this
     Agreement or the remedies in respect of the Collateral pursuant to this
     Agreement, except as may be required in connection with the disposition of
     any portion of the Security Collateral by laws affecting the offering and
     sale of securities generally.

          (j) All of the investment property owned by the Grantors on the date
     hereof is listed on Schedule I hereto.

          (k) Each of the Assigned Agreements listed on Schedule II hereto to
     which any Grantor is a party and each other Bank Hedge Agreement, if any,
     to which such Grantor is a party, true and complete copies of each of which
     have been furnished the Agent, (i) has been duly authorized, executed and
     delivered by each of the Grantors party thereto, (ii) has not been amended
     or otherwise modified and is in full force, and effect, and (iii) is
     binding upon and enforceable against each of the Grantors party thereto and
     each other Person party thereto in accordance with its terms.  There exists
     no violation or default under any Assigned Agreement by any Grantor or, to
     the best of such Grantor's knowledge, any other Person party thereto.

          SECTION 9.  Further Assurances.  (a)  Each Grantor agrees that from
                      ------------------
time to time, at its own expense, it shall promptly execute and deliver all
further instruments and

                                       11
<PAGE>

documents, and take all further action, that may be reasonably necessary,
customary or that the Agent may reasonably request, in order to perfect and
preserve any pledge, assignment or security interest granted or purported to be
granted hereby or to enable the Agent to exercise and enforce its rights and
remedies hereunder with respect to any Collateral. Without limiting the
generality of the foregoing, each Grantor shall: (i) at the request of the
Agent, mark conspicuously each chattel paper included in the Receivables in an
individual amount in excess of $75,000 and each of its records pertaining to the
Collateral with a legend, in form and substance reasonably satisfactory to the
Agent, indicating that such chattel paper or Collateral is subject to the
security interest granted hereby; (ii) if any Collateral shall be evidenced by a
promissory note or other instrument or chattel paper, and such notes or
instruments shall have an aggregate principal amount in excess of $75,000
individually, or $500,000 in the aggregate, each Grantor shall deliver and
pledge to the Agent for its benefit and the ratable benefit of the other Secured
Parties such note or instrument duly indorsed and accompanied by duly executed
instruments of transfer or assignment, all in form and substance reasonably
satisfactory to the Agent; provided, that so long as (A) no Event of Default
                           --------
shall have occurred and be continuing and (B) the Required Lenders shall not
have made the request or granted the consent specified by Section 6.01 of the
Credit Agreement to authorize the Agent to declare the Advances due and payable
pursuant to the provisions of such Section 6.01 and the Agent shall not have
made the demand specified in Section 6.02 of the Credit Agreement requiring the
Borrower to pay amounts in respect of Letters of Credit or the Canadian Borrower
to pay amounts in respect of Bankers' Acceptances, each Grantor may retain for
collection in the ordinary course any instruments received by it in the ordinary
course of business and the Agent shall, promptly upon reasonable request of the
applicable Grantor, make appropriate arrangements for making any instrument
pledged by such Grantor available to it for purposes of presentation, collection
or renewal (any such arrangement to be effected, to the extent deemed
appropriate by the Agent, against trust receipt or like document); (iii) deliver
and pledge to the Agent for its benefit and the ratable benefit of the other
Secured Parties certificates representing the Pledged Shares accompanied by
undated stock powers executed in blank and evidence that all other action that
the Agent may deem reasonably necessary or customary in order to perfect and
protect the liens and security interests created under this Agreement has been
taken; (iv) execute and file such financing or continuation statements, or
amendments thereto, and such other instruments or notices, as may be reasonably
necessary or customary as the Agent may request, in order to perfect and
preserve the pledge, assignment and security interests granted or purported to
be granted hereunder; and (v) promptly notify the Agent in writing of any change
in the information set forth on Schedule V hereto.

          (b) Each Grantor hereby authorizes the Agent to file one or more
financing or continuation statements, and amendments thereto, relating to all or
any part of the Collateral without the signature of such Grantor where permitted
by law, upon which evidence of such filing shall be sent promptly to such
Grantor.  A photocopy or other reproduction of this Agreement or any financing
statement covering the Collateral or any part thereof shall be sufficient as a
financing statement where permitted by law.

                                       12
<PAGE>

          (c) Each Grantor shall furnish to the Agent from time to time
statements and schedules further identifying and describing the Collateral and
such other reports in connection with the Collateral as the Agent may reasonably
request, all in reasonable detail.

          SECTION 10.  As to Equipment and Inventory.  (a)  Each Grantor shall
                       -----------------------------
keep its Equipment and Inventory (other than assets sold or otherwise disposed
of as permitted by the Loan Documents) at the places therefore specified in
Section 8(a) or, upon 30 days' prior written notice to the Agent, at such other
places in a jurisdiction where all action required by Section 9 shall have been
taken with respect to the Equipment and Inventory.

          (b) No Grantor shall keep in any warehouse Inventory of value of which
exceeds $500,000 at any given time (other than any such warehouses with respect
to which the Grantors have obtained landlord consents in form and substance
reasonably satisfactory to the Agent).

          SECTION 11.  Insurance.  (a)  Each Grantor shall, at its own expense,
                       ---------
maintain insurance in accordance with Section 5.01(d) of the Credit Agreement.
Each policy for liability insurance shall provide for all losses to be paid on
behalf of the Agent and the applicable Grantor as their interests may appear,
and each policy for property damage insurance shall provide for all losses to be
paid directly to the Agent, for the ratable benefit of the Secured Parties.
Each such policy shall in addition (i) name the applicable Grantor and the Agent
as insured parties thereunder (without any representation or warranty by or
obligation upon the Agent) as their interests may appear, (ii) contain the
agreement by the insurer that any loss thereunder with respect to damage to the
Grantor's property in an amount in excess of $500,000 shall be payable to the
Agent notwithstanding any action, inaction or breach of representation or
warranty by such Grantor, (iii) provide that there shall be no recourse against
the Agent for payment of premiums or other amounts with respect thereto and (iv)
provide that at least ten days' prior written notice of cancellation or of lapse
shall be given to the Agent by the insurer.  Each Grantor shall, as often as the
Agent reasonably requests, deliver to the Agent original or duplicate policies
of such insurance.  Further, each Grantor shall, at the request of the Agent,
duly execute and deliver instruments of assignment of such insurance policies to
comply with the requirements of Section 9 and use reasonable efforts to cause
the insurers to acknowledge notice of such assignment.

          (b) Reimbursement under any liability insurance maintained by any
Grantor pursuant to this Section 11 may be paid directly to the Person who shall
have incurred liability covered by such insurance.  In case of any loss
involving damage to Equipment or Inventory when Section 11(c) is not applicable,
the applicable Grantor shall be permitted to use any proceeds to make or cause
to be made the necessary repairs to or replacements or substitutions of or
additions to such Equipment, Inventory, fixed assets, real property or
improvements relating to property covered by such payments (replacements or
substitutions to be of such same type of property), and any proceeds of
insurance maintained by such Grantor pursuant to this Section 11 shall be paid
and applied pursuant to the terms of the Credit Agreement.

                                       13
<PAGE>

          (c) Upon (i) the occurrence and during the continuance of any Event of
Default and (ii) either the making of the request or the granting of the consent
specified in Section 6.01 of the Credit Agreement to authorize the Agent to
declare the Advances dues and payable pursuant to the provisions of such Section
6.01 or the making of the demand specified in Section 6.02 of the Credit
Agreement to require the Borrower to pay amounts in respect of Letters of Credit
or the Canadian Borrower to pay amounts in respect of Bankers' Acceptances, all
insurance payments in respect of such Equipment or Inventory shall be paid to
and applied by the Agent as specified in Section 19(b).

          SECTION 12.  Place of Perfection; Records; Collection of Receivables.
                       -------------------------------------------------------
(a)  Each Grantor shall keep its chief places of business and chief executive
offices and the offices where it keeps its records concerning the Collateral and
all originals of all chattel paper that evidence Receivables, at the location
therefor specified in Section 8(a) or, upon 30 days' prior written notice to the
Agent, at such other locations in a jurisdiction where all actions required by
Section 9 shall have been taken with respect to the Collateral.

          (b) Except as otherwise provided in this subsection (b), each Grantor
shall continue to collect, at its own expense, all amounts due or to become due
to such Grantor under the Receivables.  In connection with such collections,
each Grantor may take and, upon the occurrence and during the continuance of an
Event of Default, at the Agent's direction, with the approval of the Required
Lenders, shall take such action as the Agent may deem necessary or advisable to
enforce collection of the Receivables including, without limitation, (i)
extending or renewing the time or times of payment, or settling for less than
the total unpaid balance, which such Grantor finds appropriate in accordance
with sound judgment consistent with prior business practice and (ii) allowing a
refund or credit due as a result of returned or damaged merchandise, in each
such case in accordance with such Grantor's ordinary course of business
consistent with its prior collection practices; provided, however, that the
                                                --------  -------
Agent shall have the right at any time, upon (i) the occurrence of and during
the continuance of an Event of Default and (ii) either the making of the request
or the granting of the consent specified by Section 6.01 of the Credit Agreement
to authorize the Agent to declare the Advances due and payable pursuant to the
provisions of such Section 6.01 or the making of the demand specified in Section
6.02 of the Credit Agreement to require the Borrower to pay amounts in respect
of Letters of Credit or the Canadian Borrower to pay amounts in respect of
Bankers' Acceptances, upon notice to such Grantor of its intention to do so, to
notify the obligors under any Receivables of the assignment of such Receivables
to the Agent and to direct such obligors to make payment of all amounts due or
to become due to such Grantor thereunder directly to the Agent and, upon such
notification and at the expense of such Grantor, to enforce collection of any
such Receivables, and to adjust, settle or compromise the amount or payment
thereof, in the same manner and to the same extent as such Grantor might have
done.  After receipt by any Grantor of the notice from the Agent referred to in
the proviso to the immediately preceding sentence, (i) all amounts and proceeds
    -------
(including instruments) received by such Grantor in respect of the Receivables
shall be received in trust for the benefit of the Agent hereunder, shall be
segregated from other funds of such Grantor and shall be forthwith paid over to
the Agent in the same form as so received (with any necessary indorsement) to be
applied as provided by the terms of the Credit Agreement and (ii)

                                       14
<PAGE>

such Grantor shall not adjust, settle or compromise the amount or payment of any
Receivable, release wholly or partly any obligor thereof, or allow any credit or
discount thereon.

          SECTION 13.  Voting Rights; Dividends; Etc.  (a)  So long as no Event
                       -----------------------------
of Default shall have occurred and be continuing:

          (i)   Each Grantor shall be entitled to exercise any and all voting
     and other consensual rights pertaining to the Security Collateral or any
     part thereof for any purpose not inconsistent with the terms of this
     Agreement or the other Loan Documents; provided, however, that no Grantor
                                            --------  -------
     shall exercise or refrain from exercising any such right if such action is
     reasonably expected to have a Material Adverse Effect.

          (ii)  Each Grantor shall be entitled to receive and retain any and all
     dividends and interest paid in respect of the Security Collateral;
     provided, however, that any and all
     --------  -------

                (A) dividends and interest paid or payable other than in cash in
          respect of, and instruments and other property received, receivable or
          otherwise distributed in respect of, or in exchange for, such Security
          Collateral,

                (B) dividends and other distributions paid or payable in cash in
          respect of such Security Collateral in connection with a partial or
          total liquidation or dissolution or in connection with a reduction of
          capital, capital surplus or paid-in-surplus, and

                (C) cash paid, payable or otherwise distributed in respect of
          principal of, or in redemption of, or in exchange for, any Security
          Collateral,

shall be, and shall be forthwith delivered to the Agent to hold as, Security
Collateral and shall, if received by such Grantor, be received in trust for the
benefit of the Agent, be segregated from other property or funds of such Grantor
and be forthwith delivered to the Agent as Security Collateral in the same form
as so received (with any necessary indorsement or assignment) in each case,
except to the extent such distributions are permitted by the terms of the Credit
Agreement.

          (iii) The Agent shall execute and deliver (or cause to be executed
     and delivered) to each Grantor all such proxies and other instruments as
     such Grantor may request for the purpose of enabling such Grantor to
     exercise the voting and other rights that it is entitled to exercise
     pursuant to paragraph (i) above and to receive the dividends or interest
     payments that it is authorized to receive and retain pursuant to paragraph
     (ii) above.

                                       15
<PAGE>

          (b)  Upon the occurrence and during the continuance of an Event of
Default:

          (i)  All rights of any Grantor (A) to exercise or refrain from
     exercising the voting and other consensual rights that it would otherwise
     be entitled to exercise pursuant to Section 13(a)(i) shall, upon notice to
     such Grantor by the Agent, cease and (B) to receive the dividends and
     interest payments that such Grantor would otherwise be authorized to
     receive and retain pursuant to Section 13(a)(ii) shall automatically cease,
     and all such rights shall thereupon become vested in the Agent, which shall
     thereupon have the sole right to exercise or refrain from exercising such
     voting and other consensual rights and to receive and hold as Security
     Collateral such dividends and interest payments.

          (ii) All dividends and interest payments that are received by any
     Grantor contrary to the provisions of paragraph (i) of this Section 13(b)
     shall be received in trust for the benefit of the Agent, shall be
     segregated from other funds of such Grantor and shall be forthwith paid
     over to the Agent as Security Collateral in the same form as so received
     (with any necessary indorsement).

          SECTION 14.  As to the Assigned Agreements.  (a)  Each Grantor shall,
                       -----------------------------
at its expense, perform and observe all terms and provisions of each Assigned
Agreement to be performed or observed by it, maintain the Assigned Agreements to
which it is a party in full force and effect except to the extent otherwise
permitted by the Credit Agreement and enforce each of the Assigned Agreements in
accordance with the terms thereof except to the extent the failure so to
perform, observe the terms and provisions of, or enforce, any such Assigned
Agreement other than the Purchase Agreement could reasonably be expected to have
a Material Adverse Effect; and

          (b)  Each Grantor hereby consents on its behalf and on behalf of its
     Subsidiaries to the assignment and pledge to the Agent for its benefit and
     the ratable benefit of the other Secured Parties of each Assigned Agreement
     to which such Grantor or such Subsidiary is a party by any other Grantor
     hereunder.

          SECTION 15.  Transfers and Other Liens; Additional Shares. (a) Each
                       --------------------------------------------
Grantor agrees not (i) to sell, assign (by operation of law or otherwise) or
otherwise dispose of, or grant any option with respect to, any of the Collateral
of such Grantor, except sales, assignments and dispositions otherwise permitted
under Section 5.02(e) of the Credit Agreement, or (ii) to create or suffer to
exist any Lien upon or with respect to any of the Collateral, except for the
pledge, assignment and security interest created under this Agreement and the
Liens permitted under Section 5.02(a) of the Credit Agreement.

          (b)  Each Grantor shall for the Pledged Shares and all other shares of
stock pledged hereunder that are issued by issuers which are controlled by such
Grantor, cause each issuer of the Pledged Shares and each issuer of all other
shares of stock pledged hereunder not to issue any stock or other securities in
addition to or in substitution for the Pledged Shares or such other shares
issued by any such issuer, except to such Grantor.

                                       16
<PAGE>

          SECTION 16.  Agent Appointed Attorney-in-Fact.  Each Grantor hereby
                       --------------------------------
irrevocably appoints the Agent as its attorney-in-fact, with full authority in
the place and stead of such Grantor and in the name of such Grantor or otherwise
upon (i) the occurrence and during the continuance of an Event of Default and
(ii) either the making of the request or the granting of the consent specified
by Section 6.01 of the Credit Agreement to authorize the Agent to declare the
Advances due and payable pursuant to the provisions of such Section 6.01 or the
making of the demand specified in Section 6.02 of the Credit Agreement to
require the Borrower to pay amounts in respect of Letters of Credit or the
Canadian Borrower to pay amounts in respect of Bankers' Acceptances, and upon
notice to such Grantor, to take any action and to execute any instrument that
the Agent may deem reasonably necessary or advisable to accomplish the purposes
of this Agreement, including, without limitation:

          (a)  to obtain and adjust insurance required to be paid to the Agent
pursuant to Section 11,

          (b)  to ask for, demand, collect, sue for, recover, compromise,
receive and give acquittance and receipts for moneys due and to become due under
or in respect of any of the Collateral,

          (c)  to receive, indorse and collect any drafts or other instruments,
documents and chattel paper in connection with Section 16(a) or 16(b) above, and

          (d)  to file any claims, to take any action or to institute any
proceedings that the Agent may deem reasonably necessary or desirable for the
collection of any of the Collateral or otherwise to enforce compliance with the
terms and conditions of any Assigned Agreement or the rights of the Agent with
respect to any of the Collateral; provided, that the Agent shall act with
                                  --------
reasonable care in the exercise of the foregoing; and provided, further, that
                                                      --------  -------
the Agent shall give the Grantors not less than ten Business Days' prior written
notice of the time and place of any sale or other intended disposition of the
Collateral, except any such Collateral which is perishable or threatens to
decline speedily in value or is of a type customarily sold on a recognized
market.

          SECTION 17.  Agent May Perform.  Upon and during the continuance of an
                       -----------------
Event of Default, if any Grantor fails to perform any agreement contained
herein, the Agent may itself perform, or cause performance of, such agreement,
and the expenses of the Agent incurred in connection therewith shall be payable
by the Grantors under Section 21(b).

          SECTION 18.  The Agent's Duties.  The powers conferred on the Agent
                       ------------------
hereunder are solely to protect its and the other Secured Parties' interest in
the Collateral and, beyond the exercise of reasonable care, shall not impose any
duty upon it to exercise any such powers.  Except for the safe custody of any
Collateral in its possession and the accounting for moneys actually received by
it hereunder, the Agent shall have no duty as to any Collateral, as to
ascertaining or taking action with respect to calls, conversions, exchanges,
maturities, tenders or other matters relative to any Security Collateral,
whether or not the Agent or any other Secured

                                       17
<PAGE>

Party has or is deemed to have knowledge of such matters, or as to the taking of
any necessary steps to preserve rights against any parties or any other rights
pertaining to any Collateral in each case, beyond the exercise of reasonable
care. The Agent shall be deemed to have exercised reasonable care in the custody
and preservation of any Collateral in its possession if such Collateral is
accorded treatment substantially equal to that which the Agent accords its own
property.

          Anything contained herein to the contrary notwithstanding, the Agent
may from time to time, when the Agent deems it to be necessary, appoint one or
more subagents (each a "Subagent") for the Agent hereunder with respect to all
                        --------
or any part of the Collateral. In the event that the Agent so appoints any
Subagent with respect to any Collateral, (1) the assignment and pledge of such
Collateral and the security interest granted in such Collateral by the Grantors
hereunder shall be deemed for purposes of this Security Agreement to have been
made to such Subagent for the ratable benefit of the Secured Parties, as
security for the Secured Obligations of the Grantors, (2) such Subagent shall
automatically be vested with all rights, powers, privileges, interests and
remedies of the Agent hereunder with respect to such Collateral and (3) the term
"Agent," when used herein in relation to any rights, powers, privileges,
interests and remedies of the Agent with respect to such Collateral, shall
include such Subagent; provided, however, that no such Subagent shall be
                       --------  -------
authorized to take any action with respect to any such Collateral unless and
except to the extent expressly authorized in writing by the Agent.

          SECTION 19.  Remedies.  If (i) any Event of Default shall have
                       --------
occurred and be continuing and (ii) either the making of the request or the
granting of the consent specified by Section 6.01 of the Credit Agreement to
authorize the Agent to declare the Advances due and payable pursuant to the
provisions of such Section 6.01 or the making of the demand specified in Section
6.02 of the Credit Agreement to require the Borrower to pay amounts in respect
of Letters of Credit or the Canadian Borrower to pay amounts in respect of
Bankers' Acceptances shall have occurred:

                                       18
<PAGE>

          (a) The Agent may exercise in respect of the Collateral, in addition
     to other rights and remedies provided for herein or otherwise available to
     it, all the rights and remedies of a secured party upon default under the
     N.Y. Uniform Commercial Code (whether or not the N.Y. Uniform Commercial
     Code applies to the affected Collateral), and also may (i) require each
     Grantor to, and such Grantor hereby agrees that it will at its expense and
     upon request of the Agent forthwith, assemble all or part of the Collateral
     as directed by the Agent (to the extent permitted by applicable law and
     without breach of the peace) and make it available to the Agent at a place
     and time to be designated by the Agent that is reasonably convenient to
     both parties, (ii) without notice except as specified below, sell the
     Collateral or any part thereof in one or more parcels at public or private
     sale, at any of the Agent's offices or elsewhere, for cash, on credit or
     for future delivery, and upon such other terms as the Agent may deem
     commercially reasonable, (iii) occupy any premises owned or leased by any
     Grantor where the Collateral or any part thereof is assembled or located
     for a reasonable period in order to effectuate its rights and remedies
     hereunder or under law, without obligation to such Grantor in respect of
     such occupation, and (iv) exercise any and all rights and remedies of the
     Grantors under or in connection with the Assigned Agreements, the
     Receivables and the Related Contracts or otherwise in respect of the
     Collateral, including, without limitation, any and all rights of any
     Grantor to demand or otherwise require payment of any amount under, or
     performance of any provision of, the Assigned Agreements, the Receivables
     and the Related Contracts. Each Grantor agrees that, to the extent notice
     of sale shall be required by law, at least ten days' notice to such Grantor
     of the time and place of any public sale or the time after which any
     private sale is to be made shall constitute reasonable notification. The
     Agent shall not be obligated to make any sale of Collateral regardless of
     notice of sale having been given. The Agent may adjourn any public or
     private sale from time to time by announcement at the time and place fixed
     therefor, and such sale may, without further notice, be made at the time
     and place to which it was so adjourned.

          (b)  All cash proceeds received by the Agent in respect of any sale
     of, collection from, or other realization upon all or any part of the
     Collateral shall be applied (after payment of any amounts payable to the
     Agent pursuant to Section 21) in whole or in part by the Agent for its
     benefit and the ratable benefit of the other Secured Parties against, all
     or any part of the Secured Obligations in such order as the Agent shall
     elect. Any surplus of such cash or cash proceeds held by the Agent and
     remaining after payment in full of all of the Secured Obligations shall be
     paid over to the Grantors or their successors or assigns, or as a court of
     competent jurisdiction may direct.

          (c)  All payments received by the Grantors under or in connection with
     any Assigned Agreement or otherwise in respect of the Collateral shall be
     received in trust for the benefit of the Agent, shall be segregated from
     other funds of the Grantors and shall be forthwith paid over to the Agent
     in the same form as so received (with any necessary indorsement).

                                       19
<PAGE>

          (d)  The Agent may, without notice to any Grantor, except as required
     by law, and at any time or from time to time, charge, set-off and otherwise
     apply all or any part of the L/C Cash Collateral Account against the
     Secured Obligations or any part thereof.

          (e)  To the extent the Collateral is located in the State of
     Louisiana, upon (i) the occurrence and during the continuance of an Event
     of Default and (ii) either the making of the request or the granting of the
     consent specified by Section 6.01 of the Credit Agreement to authorize the
     Agent to declare the Advances due and payable pursuant to the provisions of
     such Section 6.01 or the making of the demand specified in Section 6.02 of
     the Credit Agreement to require the Borrower to pay amounts in respect of
     Letters of Credit or the Canadian Borrower to pay amounts in respect of
     Bankers' Acceptances, it shall be lawful for the Agent, and the Agent is
     hereby authorized by the Grantor without making a demand or putting in
     default (a putting in default being expressly waived), to cause all and
     singular the Collateral to be seized and sold by executory of ordinary
     process, at the Agent's sole option, with or without appraisement
     (appraisement being expressly waived), either as an entirety or in lots or
     parcels, all as the Agent may determine, to the highest bidder for cash (or
     such other terms as the Agent may elect), and otherwise exercise the
     rights, powers and remedies provided for herein and under applicable law.
     The Agent is hereby appointed agent and attorney-in-fact for the Grantor
     and is hereby authorized and empowered to carry out and enforce all
     incorporeal rights pledged by the Grantor hereunder. This power, being
     coupled with an interest, is irrevocable so long as any of the Secured
     Obligations remain outstanding. For purposes of Louisiana executory
     process, the Grantor acknowledges the liens, security interests and the
     Secured Obligations and does hereby confess judgment in favor of the Agent
     for the full amount of the Secured Obligations not paid when due. Any and
     all declarations of fact made by authentic act before a notary public in
     the presence of two witnesses by a person declaring that such facts lie
     within his knowledge shall constitute authentic evidence of such facts for
     the purpose of executory process. Upon (i) the occurrence and during the
     continuance of an Event of Default and (ii) either the making of the
     request or the granting of the consent specified by Section 6.01 of the
     Credit Agreement to authorize the Agent to declare the Advances due and
     payable pursuant to the provisions of such Section 6.01 or the making of
     the demand specified in Section 6.02 of the Credit Agreement to require the
     Borrower to pay amounts in respect of Letters of Credit or the Canadian
     Borrower to pay the amounts in respect of Bankers' Acceptances, in addition
     to all other rights herein conferred on Agent, the Grantor hereby expressly
     designates the Agent, or any agents, servants, employees or other person
     named by the Agent at that time, as "Keeper" of each and all the Collateral
     pending the judicial sale thereof, with all the powers set forth in La.
     R.S. 9:5131 et seq. (as hereinafter amended). The designation of a Keeper
     made herein shall not be deemed to require the Agent to provoke the
     appointment of such a Keeper. The Grantor waives to the fullest extent
     permitted by law: (a) the benefit of appraisement provided for in Louisiana
     Code of Civil Procedure articles 2332, 2336, 2723, and 2724, and all other
     laws conferring the same; (b) the demand and three days' delay provided for
     in Louisiana Code of Civil Procedure articles 2639 and 2721; (c) the notice
     of seizure provided for in Louisiana Code of Civil Procedure articles 2293
     and 2721; (d) the three days' delay provided for in Louisiana

                                       20
<PAGE>

     Code of Civil Procedure articles 2331 and 2772; and (e) the other benefits
     provided in Louisiana Code of Civil Procedure articles 2331, 2722 and 2723.

     SECTION 20.  Registration Rights.  If the Agent shall determine to exercise
                  -------------------
its right to sell all or any of the Security Collateral pursuant to Section 19,
each Grantor agrees that, upon request of the Agent, such Grantors will, at its
own expense:

     (a)  execute and deliver, and cause each issuer of the Security Collateral
contemplated to be sold and the directors and officers thereof to execute and
deliver, all such instruments and documents, and do or cause to be done all such
other acts and things, as may be reasonably necessary or, in the opinion of the
Agent, customary to register such Security Collateral under the provisions of
the Securities Act of 1933, (as amended from time to time, the "Securities
                                                                ----------
Act"), to cause the registration statement relating thereto to become effective
---
and to remain effective for such period as prospectuses are required by law to
be furnished and to make all amendments and supplements thereto and to the
related prospectus that, in the opinion of the Agent, are reasonably necessary
or customary, all in conformity with the requirements of the Securities Act and
the rules and regulations of the Securities and Exchange Commission applicable
thereto;

     (b)  use its best efforts to qualify the Security Collateral under the
state securities or "Blue Sky" laws and to obtain all necessary governmental
approvals for the sale of the Security Collateral, as reasonably requested by
the Agent;

     (c)  cause each such issuer to make available to its security holders, as
soon as practicable, an earnings statement that will satisfy the provisions of
Section 11(a) of the Securities Act;

     (d)  provide the Agent with such other information (including, without
limitation, forward looking information) as may be reasonably necessary or, in
the opinion of the Agent, customary to enable the Agent to effect the sale of
such Security Collateral; and

     (e)  do or cause to be done all such other acts and things as may be
reasonably necessary to make such sale of the Security Collateral or any part
thereof valid and binding and in compliance with applicable law.

The Agent is authorized, in connection with any sale of the Collateral pursuant
to Section 19, to deliver or otherwise disclose to any prospective purchaser of
the Security Collateral (i) any registration statement or prospectus, and all
supplements and amendments thereto, prepared pursuant to clause (a) above, (ii)
any information and projections provided to it pursuant to clause (d) above and
(iii) any other information in its possession relating to the Security
Collateral (not subject to a confidentiality).

     SECTION 21.  Indemnity and Expenses.  (a)  Each Grantor agrees jointly and
                  ----------------------
severally to indemnify the Secured Parties in connection with any claims, losses
and liabilities resulting from

                                       21
<PAGE>

this Agreement to the extent required by, and in accordance with the provisions
of, Section 8.04(b) of the Credit Agreement as if such Grantor were a party to
the Credit Agreement.

     (b) Each Grantor agrees jointly and severally to pay the Agent such amounts
of any fees and expenses incurred by the Agent in connection with the
administration of this Agreement as is required by, and in accordance with the
provisions of, Sections 8.04(a) and (b) of the Credit Agreement as if such
Grantor were a party to the Credit Agreement.

     SECTION 22.  Security Interest Absolute.  The obligations of the Grantors
                  --------------------------
under this Agreement are independent of the Secured Obligations and a separate
action or actions may be brought and prosecuted against any Grantor to enforce
this Agreement, irrespective of whether any action is brought against any other
Loan Party or whether any other Loan Party is joined in any such action or
actions.  All rights of the Agent and the pledge, assignment and security
interest hereunder, and all obligations of the Grantors hereunder, shall be
absolute and unconditional, irrespective of:

     (i)       any lack of validity or enforceability of any Loan Document, any
 Bank Hedge Agreement or any other agreement or instrument relating thereto;

     (ii)      any change in the time, manner or place of payment of, or in any
 other term of, all or any of the Secured Obligations, or any other amendment or
 waiver of or any consent to any departure from any Loan Document or any Bank
 Hedge Agreement, including, without limitation, any increase in the Secured
 Obligations resulting from the extension of additional credit to any Loan Party
 or otherwise;

     (iii)     any taking, exchange, release or nonperfection of any collateral,
 or any taking, release or amendment or waiver of or consent to departure from
 any guaranty, for all or any of the Secured Obligations;

     (iv)      any manner of application of collateral, or proceeds thereof, to
 all or any of the Secured Obligations, or any manner of sale or other
 disposition of any collateral for all or any of the Secured Obligations or any
 other assets of any Grantor or any of its Subsidiaries;

     (v)       any change, restructuring or termination of the corporate
 structure or existence of any Grantor or any of its Subsidiaries; or

     (vi)      any other circumstance that might otherwise constitute a defense
 available to, or a discharge of, any Grantor or a third-party grantor of a
 security interest.

This Agreement shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Secured Obligations is rescinded or
must otherwise be returned by any Secured Party or by any other Person upon the
insolvency, bankruptcy or reorganization of any Loan Party or otherwise, all as
though such payment had not been made.

                                       22
<PAGE>

     SECTION 23.  Amendments; Waivers; Etc.  (a)  No amendment or waiver of any
                  ------------------------
provision of this Agreement, and no consent to any departure by any Grantor
herefrom, shall in any event be effective unless the same shall be in writing
and signed by the Agent, and then such waiver or consent shall be effective only
in the specific instance and for the specific purpose for which given.

     (b) No failure on the part of the Agent, any Lender Party or any Hedge Bank
to exercise, and no delay in exercising, any right, power or privilege hereunder
shall operate as a waiver thereof or consent thereto; nor shall any single or
partial exercise of any such right, power or privilege preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.

     (c) Upon the execution and delivery by any Person of a security agreement
supplement in substantially the form of Exhibit B hereto (each a "Security
                                                                  --------
Agreement Supplement"), (i) such Person shall be referred to as an "Additional
--------------------
Grantor" and shall be and become a Grantor, and each reference in this Agreement
to "Grantor" or "Grantors" shall also mean and be a reference to such Additional
Grantor and (ii) the schedules attached to such Security Agreement Supplement
shall be incorporated into and become a part of and supplement Schedules I
through V hereto, and the Agent may attach such Schedules as supplements to such
Schedules, and each reference to such Schedules shall mean and be a reference to
such Schedules, as supplemented pursuant hereto.

     (d) Delivery by telecopier of an executed counterpart of any amendment or
waiver of any provision of this Agreement or of any Supplement or Schedule
hereto shall be effective as delivery of a manually executed counterpart
thereof.

     SECTION 24.  Addresses for Notices.  All notices and other communications
                  ---------------------
provided for hereunder shall be in writing (including telecopier, telegraphic or
communication) and mailed, telecopied, telegraphed, cabled or delivered, if to
any Grantor, c/o Better Minerals & Aggregates Company, Route 522 North, P.O. Box
187, Berkeley Springs, WV 25411, Attention: Chief Financial Officer, telecopier
number (304) 258-3500, and if to the Agent, any Lender Party or any Hedge Bank,
addressed to it at its address set forth in Section 8.02 of the Credit Agreement
or, as to any party, at such other address as shall be designated by such party
in a written notice to each other party complying as to delivery with the terms
of this Section 24.  All such notices and other communications shall, when
mailed, telecopied or telegraphed, be effective when received by the addressee.

     SECTION 25.  Continuing Security Interest; Assignments Under the Credit
                  ----------------------------------------------------------
Agreement.  This Agreement shall create a continuing security interest in the
---------
Collateral and shall (a) remain in full force and effect until the latest of the
payment in full in cash of the Secured Obligations, constituting an Advance or
other Secured Obligations then due and payable, the Termination Date and the
termination or expiration of all Bank Hedge Agreements or as otherwise permitted
under the Loan Documents,  (b) be binding upon the Grantors, their successors
and assigns and (c) inure, together with the rights and remedies of the Agent
hereunder, to the benefit of the Secured Parties and their respective
successors, transferees and assigns.  Without limiting the

                                       23
<PAGE>

generality of the foregoing clause (c), any Lender Party may assign or otherwise
transfer all or any portion of its rights and obligations under the Credit
Agreement (including, without limitation, all or any portion of its Commitment,
the Advances owing to it and any Note or Notes held by it) to any other Person,
and such other Person shall thereupon become vested with all the benefits in
respect thereof granted to such Lender Party herein or otherwise, in each case
as provided in Section 8.07 of the Credit Agreement.

     SECTION 26.  Release and Termination.  (a)  Upon any sale, lease, transfer
                  -----------------------
or other disposition of any item of Collateral in accordance with the terms of
the Loan Documents, the Agent will, at the applicable Grantor's expense, execute
and deliver to such Grantor such documents as such Grantor shall reasonably
request to evidence the release of such item of Collateral from the assignment
and security interest granted hereby; provided, however, that (i) at the time of
                                      --------  -------
such request and such release, no Event of Default shall have occurred and be
continuing, (ii) except to the extent such sale, lease or transfer or other
disposition is permitted under Section 5.02(e) of the Credit Agreement, such
Grantor shall have delivered to the Agent, at least ten Business Days prior to
the date of the proposed release, a written request for release describing the
item of Collateral and the terms of the sale, lease, transfer or other
disposition in reasonable detail, including, without limitation, the price
thereof and any expenses in connection therewith, together with a form of
release for execution by the Agent and a certification by such Grantor to the
effect that the transaction is in compliance with the Loan Documents and as to
such other matters as the Agent may reasonably request and (iii) the proceeds of
any such sale, lease, transfer or other disposition required to be applied in
accordance with Section 2.07 of the Credit Agreement shall be paid to, or in
accordance with the instructions of, the Agent at the closing.

     (b) Upon the latest of the payment in full in cash of the Secured
Obligations constituting an Advance or other Secured Obligations then due and
payable, the Termination Date and the termination or expiration of all Bank
Hedge Agreements, the pledge, assignment and security interest granted hereby
shall terminate and all rights to the Collateral shall revert to the Grantors.
Upon any such termination, the Agent will, at the applicable Grantor's expense,
execute and deliver to such Grantor such documents as such Grantor shall
reasonably request to evidence such termination and promptly release and return
Collateral in its possession.

     SECTION 27.  Mortgages.  In the event that any of the Collateral hereunder
                  ---------
is also subject to a valid and enforceable Lien under the terms of any mortgage
and the terms of such mortgage are inconsistent with the terms of this
Agreement, then with respect to such Collateral, the terms of such mortgage
shall be controlling in the case of fixtures and leases, letting and licenses
of, and contracts and agreements relating to, the lease of real property, and
the terms of this Agreement shall be controlling in the case of all other
Collateral.

     SECTION 28.  Execution in Counterparts.  This Agreement may be executed in
                  -------------------------
any number of counterparts, each of which when so executed shall be deemed to be
an original and all of which taken together shall constitute one and the same
agreement. Delivery of an executed counterpart of a signature page to this
Agreement by telecopier shall be effective as delivery of a manually executed
counterpart of this Agreement.

                                       24
<PAGE>

     SECTION 29.  Governing Law.  (a)  This Agreement shall be governed by and
                  -------------
construed in accordance with the laws of the State of New York, except to the
extent that the validity or perfection of the security interest hereunder, or
remedies hereunder, in respect of any particular Collateral are governed by the
laws of a jurisdiction other than the State of New York.

     (b)  Each Grantor hereby irrevocably and unconditionally submits, for
itself and its property, to the nonexclusive jurisdiction of any New York State
court or federal court of the United States of America sitting in New York City,
and any appellate court from any thereof, in any action or proceeding arising
out of or relating to this Agreement or any other Loan Document or Bank Hedge
Agreement to which it is or is to be a party, or for recognition and enforcement
of any judgment, and each Grantor hereby irrevocably and unconditionally agrees
that all claims in respect of any such action or proceeding may be heard and
determined in any such New York State or, to the extent permitted by law, in
such federal court. Each Grantor irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection or defense
that it may now or hereafter have to the laying of venue of any suit, action or
proceeding arising out of or relating to this Agreement or any of the other Loan
Documents to which it is or is to be a party in any New York State or federal
court. Each Grantor hereby irrevocably waives, to the fullest extent permitted
by law, the defense of an inconvenient forum to the maintenance of such action
or proceeding in any such court. Each Grantor agrees that a final judgment in
any such action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.
Nothing herein shall affect the right that any party may otherwise have to
commence or participate in any action, suit or proceeding relating to this
Agreement, any of the other Loan Documents or any Bank Hedge Agreement to which
it is or is to be a party, or otherwise to proceed against any Grantor, in any
other jurisdiction.

     (c)  Each Grantor irrevocably consents to the service of any and all
process in any such action, suit or proceeding at the address set forth below
its name on the signature page hereof, by any method permitted by law. Each
Grantor agrees that a final judgment in any such action or proceeding shall be
conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other manner provided by law.

     (d)  To the extent that any Grantor has or hereafter may acquire immunity
from jurisdiction of any court or from any legal process (whether through
service or notice, attachment prior to judgment, attachment in aid of execution,
execution or otherwise) with respect to themselves or their property, such
Grantor hereby irrevocably waives such immunity in respect of its Obligations
under this Agreement, any other Loan Document and any Bank Hedge Agreement to
which it is or is to be a party.

                                       25
<PAGE>

     (e)  Each Grantor irrevocably waives all right to trial by jury in any
action, proceeding or counterclaim (whether based on contract, tort or
otherwise) arising out of or relating to this Agreement, any other Loan Document
or any Bank Hedge Agreement or the actions of the Agent, any Lender Party or any
Hedge Bank in the negotiation, administration, performance or enforcement
thereof.

     IN WITNESS WHEREOF, each of the parties has caused this Agreement to be
duly executed and delivered by its officer thereunto duly authorized as of the
date first above written.

                                        BETTER MINERALS & AGGREGATES COMPANY

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        PENNSYLVANIA GLASS SAND CORPORATION

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        THE FULTON LAND AND TIMBER COMPANY

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        OTTAWA SILICA COMPANY

                                        By: /s/ John A. Ulizio
                                           -------------------------------
                                            Name:
                                            Title:

                                       26
<PAGE>

                                        GEORGE F. PETTINOS, INC.

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        ELLEN JAY, INC.

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        U.S. SILICA COMPANY

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        BETTER MATERIALS CORPORATION

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        BMC TRUCKING, INC.

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                       27
<PAGE>

                                        BUCKS COUNTY CRUSHED STONE COMPANY

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        CHIPPEWA FARMS CORPORATION

                                        By: /s/ Richard Nick
                                           -------------------------------
                                           Name: Richard Nick
                                           Title: Vice President

                                        SHORE STONE COMPANY, INC.

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        COMMERCIAL STONE CO., INC.

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                        STONE MATERIALS COMPANY, LLC

                                        By: Better Minerals & Aggregates
                                             Company, as Manager

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                       28
<PAGE>

                                        COMMERCIAL AGGREGATES TRANSPORTATION
                                        AND SALES, LLC

                                        By: Stone Materials Company, LLC, as
                                              Manager

                                        By: /s/ Richard Nick
                                           -------------------------------
                                            Name: Richard Nick
                                            Title: Vice President

                                       29
<PAGE>

                                        BANQUE NATIONALE DE PARIS,
                                        as Agent

                                        By: /s/ Richard Cushing
                                           -------------------------------
                                           Name: Richard Cushing
                                           Title: Director

                                        By: /s/ Paul Barnes
                                           -------------------------------
                                           Name: Paul Barnes
                                           Title: Assistant Vice President

                                       30
<PAGE>

                                   SCHEDULE I
                                       to
                               Security Agreement

                                     Part A
                                     ------

                                 Pledged Shares

                                                               Percentage of
                                     Stock                     Issued and
                  Class of   Par     Certificate   Number      Outstanding
Grantor  Issuer   Stock      Value   Number        of Shares   Shares of Issuer

                                    Part B
                                    ------

                                 Pledged Debt

                                                           Outstanding
Grantor  Issuer   Description of Debt   Final Maturity     Principal Amount

<PAGE>

                                  SCHEDULE II
                                      to
                              Security Agreement

                              Assigned Agreements
                              -------------------
<PAGE>

                                 SCHEDULE III
                                      to
                              Security Agreement

                     Locations of Equipment and Inventory
                     ------------------------------------
<PAGE>

                                  SCHEDULE IV
                                      to
                              Security Agreement

                               Blocked Accounts
                               ----------------
<PAGE>

                                  SCHEDULE V
                                      to
                              Security Agreement

                Principal Places of Business, Trade Names, Etc.
                -----------------------------------------------
<PAGE>

                                   EXHIBIT A
                                      to
                              Security Agreement

                            BLOCKED ACCOUNT LETTER

                           ______ __, [199_] [20__]

[Blocked Account Bank Address]

Attn:  [          ]

                      Better Minerals & Aggregates Company

Ladies and Gentlemen:

     Reference is made to the deposit accounts listed on the attached Schedule I
into which certain monies, instruments and other properties are deposited from
time to time (the "Accounts") maintained with you by [Name of Grantor] (the
                   --------
"Company").  Pursuant to the Security Agreement dated as of  [September 30],
 -------
1999 (the "Security Agreement"), the Company has granted to Banque Nationale de
           ------------------
Paris, as agent (the "Agent") for the Secured Parties referred to in the Credit
                      -----
Agreement dated as of [September 30], 1999 (the "Credit Agreement") with Better
                                                 ----------------
Minerals & Aggregates Company, BMAC Holdings, Inc. and George F. Pettinos
(Canada) Limited, a security interest in certain property of the Company,
including, among other things, the following (the "Account Collateral"):  the
                                                   ------------------
Accounts, all funds held therein and all certificates and instruments, if any,
from time to time representing or evidencing the Accounts, all interest,
dividends, cash, instruments and other property from time to time received,
receivable or otherwise distributed in respect of or in exchange for any or all
of the then existing Account Collateral and all proceeds of any and all of the
foregoing Account Collateral and, to the extent not otherwise included, all (i)
payments under insurance (whether or not the Agent is the loss payee thereof),
or any indemnity, warranty or guaranty, payable by reason of loss or damage to
or otherwise with respect to any of the foregoing Account Collateral and (ii)
cash.  It is a condition to the continued maintenance of the Accounts with you
that you agree to this letter agreement.
<PAGE>

     By signing this letter agreement, you acknowledge notice of the Security
Agreement as it pertains to this Blocked Account Letter and confirm to the Agent
that you have received no notice of any other pledge or assignment of the
Accounts at this time.  Further, you hereby agree with the Agent that:

     (a)  Notwithstanding anything to the contrary in any other agreement
relating to the Accounts, the Accounts are and will be subject to the terms and
conditions of the Security Agreement as it pertains to this Blocked Account
Letter, will be maintained solely for the benefit of the Agent, will be entitled
"[Name of Grantor], Banque Nationale de Paris, as Agent" and will be subject to
written instructions only from an officer of the Agent. You are hereby permitted
to follow the instructions of the Company until such time as you receive written
instructions to the contrary from the Agent.

     (b)  Upon the written request of the Agent to you, which request shall
specify that an "Event of Default" under the Credit Agreement has occurred and
is continuing (which writing may be by telex or telecopy and upon which you may
conclusively rely, absent manifest error), you shall immediately transfer (at
the cost and expense of the Company) subject to your usual deposit terms, all
available funds then or thereafter deposited in the Accounts by wire transfer
into the Agent's Account at the Federal Reserve Bank of New York, 33 Liberty
Street, New York, NY, 10048, [ABA No. 026007689, for further credit to Account
No. 750420-701-03].

     (c)  From and after the date that the Agent shall have sent to you a
written notice (which writing may be by telex or telecopy and upon which you may
conclusively rely, absent manifest error) that an "Event of Default" under the
Credit Agreement has occurred and until the date, if any, that the Agent shall
have advised you in writing (which writing may be by telex or telecopy and upon
which you may conclusively rely, absent manifest error) that no Event of Default
is continuing, you shall not honor any withdrawal or transfer from, or any
check, draft or other item of payment on, the Accounts, other than any
withdrawal, transfer, check, draft or other item made in writing by the Agent or
bearing the written consent of the Agent, and, to the extent of available funds
in the Accounts, you shall honor each such withdrawal, transfer, check, draft or
other item made in writing by the Agent or bearing the written consent of the
Agent.

     (d)  You will follow your usual operating procedures for the handling of
the Accounts, including any remittance received in the Accounts that contains
restrictive endorsements, irregularities (such as a variance between the written
and numerical amounts), undated or postdated items, missing signatures,
incorrect payees, etc.

     (e)  You shall furnish to the Agent, promptly upon the reasonable written
request of the Agent in each instance, all information regarding the Accounts,
to the extent the same is provided to the Company, for the period of time
specified in such written notice, and the Company hereby authorizes you to
furnish same.

     (f)  You agree that you will not make, and you hereby waive all of your
rights to make, any charge, debit or offset to the Accounts for any reason
whatsoever, and waive any and all liens, whether contractual or provided under
law, which you may have or hereafter acquire on
<PAGE>

the Accounts or funds therein, in each case, other than any charge, offset,
debit or lien in respect of your customary service charges, such as reversed or
returned credits, items not collected or other charges, expenses and commissions
incurred by you in providing the service, and returned items relating to the
Accounts.

     (g)  All service charges and fees with respect to the Accounts shall be
payable by the Company.

     (h)  After the giving of notice referred to in paragraphs (b) and (c)
above, the Agent shall be entitled to exercise any and all rights of the Company
in respect of the Accounts, and the undersigned shall comply in all respects
with such exercise.

     (i)  Notwithstanding any other provision contained herein, unless you are
grossly negligent or engage in willful misconduct in performance or non-
performance  in connection with this letter agreement and the Accounts, the
Agent and the Company agree to hold you harmless from any claims, damages,
losses or expenses incurred by any party in connection herewith; in the event
you breach the standard of care set forth herein, the Company and the Agent
expressly agree that your liability shall be limited to damages directly caused
by such breach and in no event shall you be liable for any incidental, indirect,
punitive or consequential damages or attorneys' fees whatsoever.

     (j)  Notwithstanding any other provision of this letter agreement, you
shall not be liable for any failure, inability to perform, or delay in
performance hereunder, if such failure, inability, or delay is due to acts of
God, war, civil commotion, governmental action, fire, explosion, strikes, other
industrial disturbances, equipment malfunction, action, non-action or delayed
action on the part of the Company or the Agent or any other entity or any other
causes that are beyond your reasonable control.

     (k)  The Company and the Agent agree that you may debit the Account for any
items (including, but not limited to, checks, drafts, Automatic Clearinghouse
(ACH) credits or wire transfers) deposited or credit to the Accounts which may
be returned or otherwise not collected and for all charges, fees, commissions
and expenses incurred by you in providing services or otherwise in connection
herewith; you may charge the Accounts as permitted herein at such times as are
in accordance with your customary practices for the chargeback of returned items
and expenses.  In the event you are unable to obtain sufficient funds from such
charges to cover returned items, or reversed or returned credits, or items not
collected and any other charges, expenses, or commissions incurred by you in
providing the services, the Company and the Agent shall indemnify you for all
amounts described above incurred by you.

     (l)  This letter agreement may not be modified or terminated by the Company
unless the prior written consent of you and the Agent are obtained.  This letter
agreement may be terminated:  (i) immediately for cause or (ii) upon thirty (30)
days' prior written notice to the Company or the Agent, as the case may be,
without cause.  Upon such termination you shall close the Accounts and transfer
all funds as they become available in the Accounts to the Agent's

                                       3
<PAGE>

Account specified in paragraph (b) above. Paragraph (k) above shall survive any
such termination and closure of the Accounts for fifteen (15) days.

     This letter agreement shall be binding upon you and your successors and
assigns and shall inure to the benefit of the Agent, the Lenders and their
successors, transferees and assigns.

     This letter agreement shall become effective immediately upon its execution
by all parties hereto.  Any notice permitted or required hereunder shall be in
writing and shall be deemed to have been duly given if sent by personal
delivery, express or first class mail, or facsimile addressed, in the case of
notice to you at your address listed on the signature page hereof.

                                       4
<PAGE>

     This letter agreement shall be governed by and construed in accordance with
the laws of the State of New York.

                                   Very truly yours,

                                   [NAME OF GRANTOR]
                                   Address:
                                   Attention:
                                   Telecopier Number:

                                   By:________________________________
                                      Name:
                                      Title:

                                   BANQUE NATIONALE DE PARIS,
                                    as Agent
                                   499 Park Avenue
                                   New York, NY 10022
                                   Attention: Mr. Eric Deram
                                   Telecopier Number:
                                   (212) 418-8269

                                   By:________________________________
                                      Name:
                                      Title:

Acknowledged and agreed to as of
the date first above written:

[BLOCKED ACCOUNT BANK NAME]

By:____________________________
   Name:
   Title:

                                       5
<PAGE>

                                  SCHEDULE I
                                      to
                            Blocked Account Letter

Blocked Accounts:
----------------
<PAGE>

                                   EXHIBIT B
                                       to
                               Security Agreement

                     FORM OF SECURITY AGREEMENT SUPPLEMENT

                                                       ________________ __, ____

Banque National de Paris, New York Branch,
  as Agent
499 Park Avenue
New York, New York  10022
Attention:

            Security Agreement dated as of September 30, 1999 among
                    Better Minerals & Aggregates Company and
 additional grantors named therein, as Grantors, and Banque Nationale de Paris,
                                    as Agent

Ladies and Gentlemen:

     Reference is made to the above-captioned Security Agreement (as amended,
supplemented or otherwise modified from time to time, the "Security Agreement").
                                                           ------------------
Unless otherwise defined herein, terms defined in the Security Agreement are
used herein as therein defined.

     The undersigned hereby agrees, as of the date first above written, to
become a Grantor under the Security Agreement as if it were an original party
thereto and agrees that each reference in the Security Agreement to a "Grantor"
or the "Grantors" shall also mean and be a reference to the undersigned.

     The undersigned hereby assigns and pledges to the Agent for its benefit and
the ratable benefit of the Secured Parties and hereby grants to the Agent for
its benefit and the ratable benefit of the Secured Parties as collateral for the
Secured Obligations a pledge and assignment of, and a security interest in, all
of the right, title and interest of the undersigned in and to its Collateral,
whether now owned or hereafter acquired.

     The undersigned has attached hereto supplements to Schedules I through V to
the Security Agreement, and the undersigned hereby certifies that such
supplements have been prepared by the undersigned in substantially the form of
the Schedules to the Security Agreement and are accurate and complete as of the
date first above written.
<PAGE>

     The undersigned hereby makes each representation and warranty set forth in
Section 8 of the Security Agreement as to itself and as to its Collateral to the
same extent as each other Grantor and hereby agrees to be bound as a Grantor by
all of the terms and provisions of the Security Agreement to the same extent as
any other Grantor.

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

                                    Very truly yours,

                                    [NAME OF ADDITIONAL
                                      GRANTOR]

                                   By_________________________________
                                     Name:
                                     Title:
                                     Address:

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