April 9, 2001

To:      Employees with Unocal Stock in the Unocal Savings Plan and
         Employees with Restricted Stock

From:    Brigitte M. Dewez, Corporate Secretary

Re:      Delivery of 2000 Annual Report and 2001 Proxy Statement
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Unocal's 2000 Annual Report and 2001 Proxy  Statement are now available  on-line
for  employees.  Both  documents  are  accessible  in either the Outlook  Public
Folders or on the Unocal SeventySix home page on the intranet.

The complete documents are posted in both locations in pdf format. You will need
to have Adobe Acrobat Reader installed on your computer to view these documents.
Instructions for downloading and installing Acrobat Reader are available in both
locations.

OUTLOOK FOLDER:
[Folder Link Here]

SeventySix Home Page: http://st.unocal.com/76/00ar/

A proxy card to vote your Savings Plan shares and any shares of restricted stock
you own for this year's  annual  meeting is  scheduled to arrive at your address
within the next three weeks through the U.S.  Mail. If you have  requested  hard
copies  of the  annual  report  or proxy  statement  (by  e-mail or fax to David
Whitehurst), those will be mailed to you as well.

Your vote is important.  When your proxy card comes in the mail,  you may choose
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to vote by  internet,  phone,  or mail.  The website and phone  number to Mellon
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Investor Services, the independent proxy tabulator, and a control number, are on
the proxy card to vote by  internet or phone.  A return  envelope is provided if
you decide to return your vote by mail. The proxy  tabulator will keep your vote
confidential no matter which voting method you choose.

Thank you for your attention to this important matter.