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                                                                    EXHIBIT 99.2
 
                    GUIDELINES FOR CERTIFICATION OF TAXPAYER
                  IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9
 
IRS INSTRUCTIONS
(SECTION REFERENCES ARE TO THE INTERNAL REVENUE CODE.)
 
   PURPOSES OF FORM. -- A person who is required to file an information return
with the Internal Revenue Service (the IRS) must obtain your correct taxpayer
identification number (TIN) to report income paid to you, real estate
transactions, mortgage interest you paid, the acquisition or abandonment of
secured property, or contributions you made to an individual retirement account
(IRA). Use Form W-9 to furnish your correct TIN to the requester (the person
asking you to furnish your TIN), and, when applicable, (1) to certify that the
TIN you are furnishing is correct (or that you are waiting for a number to be
issued), (2) to certify that you are not subject to backup withholding, and (3)
to claim exemption from backup withholding if you are an exempt payee.
Furnishing your correct TIN and making the appropriate certifications will
prevent certain payments from being subject to backup withholding.
 
   NOTE: IF A REQUESTER GIVES YOU A FORM OTHER THAN A W-9 TO REQUEST YOUR TIN,
YOU MUST USE THE REQUESTER'S FORM.
 
   HOW TO OBTAIN A TIN. -- If you do not have a TIN, apply for one immediately.
To apply, get FORM SS-5, Application for a Social Security Card (SSN) (for
individuals), from your local office of the Social Security Administration, or
FORM SS-4, Application for Employer Identification Number (EIN) (for businesses
and all other entities), from your local IRS office.
 
 To complete Form W-9, if you do not have a TIN, check the box in Part 3 of the
substitute Form W-9, sign and date the form, and give it to the requester.
Generally, you will then have 60 days to obtain a TIN and furnish it to the
requester. If the requester does not receive your TIN within 60 days, backup
withholding, if applicable, will begin and continue until you furnish your TIN
to the requester. For reportable interest or dividend payments, the payer must
exercise one of the following options concerning backup withholding during this
60-day period. Under option (1), a payer must backup withhold on any withdrawals
you make from your account after 7 business days after the requester receives
this form back from you. Under option (2), the payer must backup withhold on any
reportable interest or dividend payments made to your account, regardless of
whether you make any withdrawals. The backup withholding under option (2) must
begin no later than 7 business days after the requester receives this form back.
Under option (2), the payer is required to refund the amounts withheld if your
certified TIN is received within the 60-day period and you were not subject to
backup withholding during the period.
 
   NOTE: CHECKING THE BOX IN PART 3 OF THE SUBSTITUTE FORM W-9 MEANS THAT YOU
HAVE ALREADY APPLIED FOR A TIN OR THAT YOU INTEND TO APPLY FOR ONE IN THE NEAR
FUTURE.
 
   As soon as you receive your TIN, complete another Form W-9, include your TIN,
sign and date this form, and give it to the requester.
 
   WHAT IS BACKUP WITHHOLDING? -- Persons making certain payments to you after
1992 are required to withhold and pay to the IRS 31% of such payments under
certain conditions. This is called "backup withholding." Payments that could be
subject to backup withholding include interest, dividends, broker and barter
exchange transactions, rents, royalties, nonemployee compensation, and certain
payments from fishing boat operators, but do not include real estate
transactions.
 
   If you give the requester your correct TIN, make the appropriate
certifications, and report all your taxable interest and dividends on your tax
return, your payments will not be subject to backup withholding. Payments you
receive will be subject to backup withholding if:
 
   (1) You do not furnish your TIN to the requester, or
 
   (2) The IRS notifies the requester that you furnished an incorrect TIN, or
 
   (3) You are notified by the IRS that you are subject to backup withholding
because you failed to report all your interest and dividends on your tax return
(for reportable interest and dividends only), or
 
   (4) You fail to certify to the requester that you are not subject to backup
withholding under (3) above (for reportable interest and dividend accounts
opened after 1983 only), or
 
   (5) You fail to certify your TIN. This applies only to reportable interest,
dividend, broker or barter exchange accounts opened after 1983, or broker
accounts considered inactive in 1983.
 
   Except as explained in (5) above, other reportable payments are subject to
backup withholding only if (1) or (2) above applies. Certain payees and payments
are exempt from backup withholding and information reporting. See PAYEES AND
PAYMENTS EXEMPT FROM BACKUP WITHHOLDING, below, and EXEMPT PAYEES AND PAYMENTS
under SPECIFIC INSTRUCTIONS, on page 2, if you are an exempt payee.
 
   PAYEES AND PAYMENTS EXEMPT FROM BACKUP WITHHOLDING. -- The following is a
list of payees exempt from backup withholding and for which no information
reporting is required. For interest and dividends, all listed payees are exempt
except item (9). For broker transactions, payees listed in (1) through (13) and
a person registered under the Investment Advisers Act of 1940 who regularly acts
as a broker are exempt. Payments subject to reporting under sections 6041 and
6041A are generally exempt from backup withholding only if made to payees
described in items (1) through (7), except that a corporation that provides
medical and health care services or bills and collects payments for such
services is not exempt from backup withholding or information reporting. Only
payees described in items (2) through (6) are exempt from backup withholding for
barter exchange transactions, patronage dividends, and payments by certain
fishing boat operators.
 
   (1) A corporation.
 
   (2) An organization exempt from tax under Section 501(a), or an IRA, or a
custodial account under section 403(b)(7).
 
   (3) The United States or any of its agencies or instrumentalities.
 
   (4) A state, the District of Columbia, a possession of the United States, or
any of their political subdivisions or instrumentalities.
 
   (5) A foreign government or any of its political subdivisions, agencies or
instrumentalities.
 
   (6) An international organization or any of its agencies or
instrumentalities.
 
   (7) A foreign central bank of issue.
 
   (8) A dealer in securities or commodities required to register in the U.S. or
a possession of the U.S.
 
   (9) A futures commission merchant registered with the Commodity Futures
Trading Commission.
 
   (10) A real estate investment trust.
 
   (11) An entity registered at all times during the tax year under the
Investment Company Act of 1940.
 
   (12) A common trust fund operated by a bank under section 584(a).
 
   (13) A financial institution.
 
   (14) A middleman known in the investment community as a nominee or listed in
the most recent publication of the American Society of Corporation Secretaries,
Inc., Nominee List.
 
   (15) A trust exempt from tax under section 664 or described in section 4947.
 
 Payments of dividends and patronage dividends generally not subject to backup
withholding also include the following:
 
   - Payments to nonresident aliens subject to withholding under section 1441.
 
   - Payments to partnerships not engaged in trade or business in the U.S. and
     that have at least one nonresident partner.
 
   - Payments of patronage dividends not paid in money.
 
   - Payments made by certain foreign organizations.
 
   Payments of interest generally not subject to backup withholding include the
following:
 
   - Payments of interest on obligations issued by individuals.
 
 NOTE: YOU 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 YOU HAVE NOT
 PROVIDED YOUR CORRECT TIN TO THE PAYER.
 
   - Payments of tax-exempt interest (including exempt-interest dividends under
     section 852).
 
   - Payments described in section 6049(b)(5) to nonresident aliens.
 
   - Payments on tax-free covenant bonds under section 1451.
 
   - Payments made by certain foreign organizations.
 
   - Mortgage interest paid by you.
 
 Payments that are not subject to information reporting are also not subject to
backup withholding. For details, see sections 6041, 6041A(a), 6042, 6044, 6045,
6049, 6050A, and 6050N, and their regulations.
 
PENALTIES
   FAILURE TO FURNISH TIN. -- If you fail to furnish your correct TIN to a
requester, 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.
 
   CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis that results in no backup
withholding, you are subject to a $500 penalty.
 
   CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
   MISUSE OF TINS. -- If the requester discloses or uses TINs in violation of
Federal law, the requester may be subject to civil and criminal penalties.
   2
 
SPECIFIC INSTRUCTIONS
 
    NAME. -- If you are an individual, you must generally provide the name shown
on your social security card. However, if you have changed your last name, for
instance, due to marriage, without informing the Social Security Administration
of the name change, please enter your first name, the last name shown on your
social security card and your new last name.
 
    If you are a sole proprietor, you must furnish your individual name and
either your SSN or EIN. You may also enter your business name. Enter your
name(s) as shown on your social security card and/or as it was used to apply for
your EIN on Form SS-4.
 
SIGNING THE CERTIFICATION. --
 
    (1) INTEREST, DIVIDEND, AND BARTER EXCHANGE ACCOUNTS OPENED BEFORE 1984 AND
BROKER ACCOUNTS CONSIDERED ACTIVE DURING 1983. -- You are required to furnish
your correct TIN, but you are not required to sign the certification.
 
    (2) INTEREST, DIVIDEND, BROKER AND BARTER EXCHANGE ACCOUNTS OPENED AFTER
1983 AND BROKER ACCOUNTS CONSIDERED INACTIVE DURING 1983. -- You must sign the
certification or backup withholding will apply. If you are subject to backup
withholding and you are merely providing your correct TIN to the requester, you
must cross out item (2) in the certification before signing the form.
 
    (3) REAL ESTATE TRANSACTION. -- You must sign the certification. You may
cross out item (2) of the certification.
 
    (4) OTHER PAYMENTS. -- You are required to furnish your correct TIN, but you
are not required to sign the certification unless you have been notified of an
incorrect TIN. Other payments include payments made in the course of the
requester's trade or business for rents, royalties, goods (other than bills for
merchandise), medical and health care services, payments to a nonemployee for
services (including attorney and accounting fees), and payments to certain
fishing boat crew members.
 
    (5) MORTGAGE INTEREST PAID BY YOU, ACQUISITION OR ABANDONMENT OF SECURED
PROPERTY, OR IRA CONTRIBUTIONS. -- You are requested to furnish your correct
TIN, but you are not required to sign the certification.
 
    (6) EXEMPT PAYEES AND PAYMENTS. -- If you are exempt from backup
withholding, you should complete this form to avoid possible erroneous backup
withholding. Enter your correct TIN in Part 1, write "EXEMPT" in the block in
Part 2, and sign and date the form. If you are a nonresident alien or foreign
entity not subject to backup withholding, give the requester a completed Form
W-8, Certificate of Foreign Status.
 
    (7) "AWAITING TIN". -- Follow the instructions under HOW TO OBTAIN A TIN, on
page 1, check the box in Part 3 of the Substitute Form W-9 and sign and date the
form.
 
    SIGNATURE. -- For a joint account, only the person whose TIN is shown in
Part 1 should sign the form.
 
    PRIVACY ACT NOTICE. -- Section 8109 requires you to furnish your correct TIN
to persons who must file information returns with the IRS to report interest,
dividends, and certain other income paid to you, mortgage interest you paid, the
acquisition or abandonment of secured property, or contributions you made to an
IRA. The IRS uses the numbers for identification purposes and to help verify the
accuracy of your tax return. You must provide your TIN whether or not you are
required to file a tax return. Payers must generally withhold 31% of taxable
interest, dividends, and certain other payments to a payee who does not furnish
a TIN to a payer. Certain penalties may also apply.
 
WHAT NAME AND NUMBER TO GIVE THE REQUESTER
 

                                                                                                 
- ------------------------------------------------------------        ------------------------------------------------------------
                                      GIVE THE NAME AND                                                   GIVE THE NAME AND
FOR THIS TYPE OF ACCOUNT:             SOCIAL SECURITY               FOR THIS TYPE OF ACCOUNT:             EMPLOYER IDENTIFI-
                                      NUMBER OF:                                                          CATION NUMBER OF:
- ------------------------------------------------------------        ------------------------------------------------------------
  1.  Individual                        The individual
  2.  Two or more individuals           The actual owner of the
      (joint account)                   account or, if combined
                                        funds, the first
                                        individual on the
                                        account(1)
  3.  Custodian account of a minor      The minor(2)
      (Uniform Gift to Minors Act)
  4.  a. The usual revocable savings    The grantor-trustee(1)
      trust (grantor is also trustee)
      b. So-called trust account that   The actual owner(1)
      is not a legal or valid trust
         under state law
  5.  Sole proprietorship               The owner(3)
  6.  Sole proprietorship               The owner(3)
  7.  A valid trust, estate or pension  Legal entity(4)
      trust
  8.  Corporate                         The corporation
  9.  Association, club, religious,     The organization
      charitable, educational, or
      other tax-exempt organization
 10.  Partnership                       The partnership
 11.  A broker or registered nominee    The broker or nominee
 12.  Account with Department of        The public entity
      Agriculture in the name of a
      public entity (such as a state
      or local government, school
      district, or prison) that
      receives agricultural 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) Show the individual's name. You may also enter your business name. You may
    use your SSN or EIN.
 
(4) List first and circle the name of the legal trust, estate, or pension trust.
    (Do not furnish the TIN of the personal representative or trustee unless the
    legal entity itself is not designated in the account title.)
 
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.