EXHIBIT 99.1

                             EQUISTAR CHEMICALS, LP
                          EQUISTAR FUNDING CORPORATION

                                LETTER TO CLIENTS

                          for Tender of All Outstanding
                     Unregistered 10 5/8% Senior Notes due 2011
                                 in Exchange for
                      Registered 10 5/8% Senior Notes due 2011

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The Exchange Offer will expire at 5:00 p.m., New York City time, on            ,
2003 (the "Expiration Date"), unless sooner terminated or extended. Outstanding
notes tendered in the exchange offer may be withdrawn at any time before 5:00
p.m., New York City time, on the Expiration Date.
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To Our Clients:

         We are enclosing with this letter a prospectus dated                  ,
2003 (the "Prospectus") of Equistar Chemicals, LP and Equistar Funding
Corporation (together, the "Issuers") and the related letter of transmittal.
These two documents together constitute the Issuers' offer to exchange their
10 5/8% Senior Notes due 2011 ( the "New Notes"), the issuance of which has been
registered under the Securities Act of 1933, as amended (the "Securities Act"),
for a like principal amount of their issued and outstanding 10 5/8% Senior Notes
due 2011 (the "Outstanding Notes"). The exchange of Outstanding Notes for New
Notes and related documentation are referred to herein as the "Exchange Offer."

         The Exchange Offer is not conditioned upon any minimum aggregate
principal amount of Outstanding Notes being tendered for exchange.

         We are the holder of record of Outstanding Notes held by us for your
own account. A tender of your Outstanding Notes held by us can be made only by
us as the record holder according to your instructions. The letter of
transmittal is furnished to you for your information only and cannot be used by
you to tender Outstanding Notes held by us for your account.

         We request instructions as to whether you wish to tender any or all of
the Outstanding Notes held by us for your account under the terms and conditions
of the Exchange Offer. We also request that you confirm that we may, on your
behalf, make the representations contained in the letter of transmittal.

         Under the Letter of Transmittal, each holder of Outstanding Notes will
represent to the Issuers that:

         1.       such person is not an "affiliate," as defined in Rule 405
                  under the Securities Act, of the Issuers or a broker-dealer
                  tendering Outstanding Notes acquired directly from the Issuers
                  for its own account;

         2.       if such person is not a broker-dealer or is a broker-dealer
                  but will not receive New Notes for its own account in exchange
                  for Outstanding Notes, it is not engaged in, and does not
                  intend to participate in, a distribution of the New Notes;

         3.       such person does not have an arrangement or understanding with
                  any person to participate in the distribution of the
                  Outstanding Notes or the New Notes within the meaning of the
                  Securities Act;

         4.       any New Notes to be received are being acquired in the
                  ordinary course of business of the person receiving such New
                  Notes; and

         5.       if such person is a broker-dealer who will receive New Notes
                  for its own account in exchange for Outstanding Notes, the
                  Outstanding Notes to be exchanged for New Notes were acquired
                  as a



                  result of market-making activities or other trading
                  activities, and it will deliver a Prospectus in connection
                  with any resale of those New Notes; however, by so
                  acknowledging and by delivering a Prospectus, it will not be
                  deemed to admit that it is an "underwriter" within the meaning
                  of the Securities Act.

                                                     Very truly yours,

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         Please return your instructions to us in the enclosed envelope within
ample time to permit us to submit a tender on your behalf before the Expiration
Date.

                                 INSTRUCTION TO
                            DTC TRANSFER PARTICIPANT

To Participant of The Depository Trust Company:

         The undersigned hereby acknowledges receipt and review of the
prospectus dated                , 2003 (the "Prospectus") of Equistar Chemicals,
LP and Equistar Funding Corporation (together, the "Issuers") and the related
letter of transmittal. These two documents together constitute the Issuers'
offer to exchange their 10 5/8% Senior Notes due 2011 (the "New Notes"), the
issuance of which has been registered under the Securities Act of 1933, as
amended (the "Securities Act"), for a like principal amount of their issued and
outstanding 10 5/8% Senior Notes due 2011 (the "Outstanding Notes"). The
exchange of Outstanding Notes for New Notes is referred to herein as an
"Exchange Offer."

         This will instruct you, the registered holder and DTC participant, as
to the action to be taken by you relating to the Exchange Offer for the
Outstanding Notes held by you for the account of the undersigned.

         The aggregate principal amount of the Outstanding Notes held by you for
the account of the undersigned is (fill in amount):

         -----------------------------------------------------------------------
                                                                       Principal
         Title of Series                                                Amount
         ---------------                                                ------
         Equistar Chemicals, LP and Equistar Funding Corporation
         10 5/8% Senior Notes due 2011...............................
         -----------------------------------------------------------------------

With respect to the Exchange Offer, the undersigned hereby instructs
you (check appropriate box):

         [_] To TENDER all Outstanding Notes held by you for the account of the
             undersigned.
         [_] To TENDER the following amount of Outstanding Notes
             held by you for the account of the undersigned:

         -----------------------------------------------------------------------
                                                                       Principal
         Title of Series                                                Amount
         ---------------                                                ------
         Equistar Chemicals, LP and Equistar Funding Corporation
         10 5/8% Senior Notes due 2011...............................
         -----------------------------------------------------------------------

         [_] NOT to TENDER any Outstanding Notes held by you for the account of
             the undersigned.

         If no box is checked, a signed and returned Instruction to DTC Transfer
Participant will be deemed to instruct you to tender all Outstanding Notes held
by you for the account of the undersigned.

         If the undersigned instructs you to tender the Outstanding Notes held
by you for the account of the undersigned, it is understood that you are
authorized to make, on behalf of the undersigned (and the undersigned, by its
signature below, hereby makes to you), the representations contained in the
letter of transmittal that are to be made with respect to the undersigned as a
beneficial owner, including, but not limited to, the representations that

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         1.       the undersigned is not an "affiliate," as defined in Rule 405
                  under the Securities Act, of the Issuers or a broker-dealer
                  tendering Outstanding Notes acquired directly from the Issuers
                  for its own account;

         2.       if the undersigned is not a broker-dealer or is a
                  broker-dealer but will not receive New Notes for its own
                  account in exchange for Outstanding Notes, it is not engaged
                  in, and does not intend to participate in, a distribution of
                  New Notes;

         3.       the undersigned does not have an arrangement or understanding
                  with any person to participate in the distribution of the
                  Outstanding Notes or the New Notes within the meaning of the
                  Securities Act;

         4.       any New Notes received are being acquired in the ordinary
                  course of business of the undersigned; and

         5.       if the undersigned is a broker-dealer that will receive New
                  Notes for its own account in exchange for Outstanding Notes,
                  the Outstanding Notes to be exchanged for New Notes were
                  acquired as a result of market-making activities or other
                  trading activities, and the undersigned will deliver a
                  Prospectus in connection with any resale of those New Notes;
                  however, by so acknowledging and by delivering a Prospectus,
                  the undersigned will not be deemed to admit that it is an
                  "underwriter" within the meaning of the Securities Act.

                                    SIGN HERE

Name of beneficial owner(s):
                            ----------------------------------------------------

Signature(s):
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Name(s) (please print):
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Address:
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Telephone Number:
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Taxpayer Identification or Social Security Number:
                                                  ------------------------------

Date:
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