GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
    GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER.--Social Security numbers have nine digits separated by two hyphens: i.e.,
000-00-0000. Employer identification numbers have nine digits separated by only
one hyphen: i.e., 00-0000000. The table below will help determine the number to
give the payer.
 


FOR THIS TYPE OF ACCOUNT:                                         GIVE THE SOCIAL SECURITY NUMBER OF--
- ----------------------------------------------------------------  -----------------------------------------------------
                                                            
1.         An individual's account                                The individual
 
2.         Two or more individuals (joint account)                The actual owner of the account or, if combined
                                                                  funds, any one of the individuals(1)
 
3.         Husband and wife (joint account)                       The actual owner of the account or, if joint funds,
                                                                  either person(1)
 
4.         Custodian account of a minor (Uniform Gift to Minors   The minor(2)
           Act)
 
5.         Adult and minor (joint account)                        The adult or, if the minor is the only contributor,
                                                                  the minor(1)
 
6.         Account in the name of guardian or committee for a     The ward, minor or incompetent person(3)
           designated ward, minor or incompetent person
 
7.         a. The usual revocable savings trust account (grantor  The grantor-trustee(1)
           is also trustee)
           b. So-called trust account that is not a legal or      The actual owner(1)
           valid trust under State law
 
8.         Sole proprietorship                                    The owner(4)
 
9.         A valid trust, estate or pension trust                 The legal entity (Do not furnish the number of the
                                                                  personal representative or trustee unless the legal
                                                                  entity itself is not designated in the account
                                                                  title)(5)
 
10.        Corporate account                                      The corporation
 
11.        Religious, charitable or educational organization      The organization
           account
 
12.        Partnership account held in the name of the business   The partnership
 
13.        Association, club or other tax-exempt organization     The organization
 
14.        A broker or registered nominee                         The broker or nominee
 
15.        Account with the Department of Agriculture in the      The public entity
           name of a public entity (such as a state or local
           government, school district or prison) that receives
           agriculture program payments

 
- ------------------------
 
(1) List first and circle the name of the person whose number you furnish.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
 
(4) You must show your individual name, but you may also enter your business or
    "doing business as" name. You may use either your social security number or
    your employer identification number.
 
(5) List first and circle the name of the legal trust, estate or pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.

OBTAINING A NUMBER
 
    If you don't have a taxpayer identification number or you do not know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service and apply for a
number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
 
    Payees specifically exempted from backup withholding on ALL payments include
the following:
 
    - A corporation.
 
    - A financial institution.
 
    - An organization exempt from tax under section 501(a), of the Internal
      Revenue Code of 1986, as amended (the "Code"), or an individual retirement
      plan.
 
    - The United States or any agency or instrumentality thereof.
 
    - A State, the District of Columbia, a possession of the United States or
      any subdivision or instrumentality thereof.
 
    - A foreign government, a political subdivision of a foreign government or
      any agency or instrumentality thereof.
 
    - An international organization or any agency or instrumentality thereof.
 
    - A registered dealer in securities or commodities registered in the United
      States or a possession of the United States.
 
    - A real estate investment trust.
 
    - A common trust fund operated by a bank under section 584(a) of the Code.
 
    - An exempt charitable remainder trust, or a non-exempt trust described in
      section 4947(a)(1) of the Code.
 
    - An entity registered at all times under the Investment Company Act of
      1940.
 
    - A foreign central bank of issue.
 
PAYMENTS NOT GENERALLY SUBJECT TO BACKUP WITHHOLDING
 
    Payments of dividends and patronage dividends not generally subject to
backup withholding include the following:
 
    - Payments to nonresident aliens subject to withholding under section 1441
      of the Code.
 
    - Payments to partnerships not engaged in a trade or business in the United
      States and which have at least one nonresident partner.
 
    - Payments of patronage dividends where the amount received is not paid in
      money.
 
    - Payments made by certain foreign organizations.
 
    - Section 404(k) payments made by an ESOP.
 
    Payments of interest not generally subject to backup withholding include the
following:
 
    - Payments of interest on obligations issued by individuals. Note: A Payee
      may be subject to backup withholding if this interest is $600 or more and
      is paid in the course of the payer's trade or business and such payee has
      not provided its correct taxpayer identification number to the payer.
 
    - Payments of tax-exempt interest (including exempt-interest dividends under
      section 852 of the Code).
 
    - Payments described in section 6049(b)(5) of the Code to nonresident
      aliens.
 
    - Payments on tax-free covenant bonds under section 1451 of the Code.
 
    - Payments made by certain foreign organizations.
 
    - Mortgage interest paid to you.
 
EXEMPT PAYEES DESCRIBED ABOVE MUST STILL COMPLETE THE SUBSTITUTE FORM W-9 TO
AVOID POSSIBLE ERRONEOUS BACKUP WITHHOLDING. FILE SUBSTITUTE FORM W-9 WITH THE
PAYER, FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE
OF THE FORM, AND RETURN IT TO THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS
OR PATRONAGE DIVIDENDS, ALSO SIGN AND DATE THE FORM.
 
    Certain payments other than interest, dividends and patronage dividends,
that are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6045 and 6050A of the Code.
 
    PRIVACY ACT NOTICE.--Section 6109 of the Code requires most recipients of
dividends, interest or other payments to give taxpayer identification numbers to
payers who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Payers must generally withhold 31%
of taxable interest, dividends, and certain other payments to a payee who does
not furnish a taxpayer identification number to a payer. Certain penalties may
also apply.
 
PENALTIES
 
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. If you fail
    to furnish your taxpayer identification number to a payer, you are subject
    to a penalty of $50 for each such failure unless your failure is due to
    reasonable cause and not to willful neglect.
 
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. If you make
    a false statement with no reasonable basis that results in no imposition of
    backup withholding, you are subject to a penalty of $500.
 
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. Falsifying certifications or
    affirmations may subject you to criminal penalties including fines and/or
    imprisonment.
 
(4) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS. If you fail to
    include any portion of an includable payment for interest, dividends or
    patronage dividends in gross income and such failure is due to negligence, a
    penalty of 20% is imposed on any portion of an underpayment attributable to
    that failure.
 
FOR ADDITIONAL INFORMATION, CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE.