FORM U-6B-2/CERTIFICATE OF
                  NOTIFICATION under the Public Utility Holding
                    Company Act of 1935, as amended ("PUHCA")

     CST Green  Power,  L.P.  ("CST"),  a Delaware  limited  partnership  and an
indirect subsidiary of Cinergy Corp., a registered holding company  ("Cinergy"),
hereby  affirms that it has borrowed  the proceeds of the  securities  described
below pursuant to an exemption under Section 6(a) of PUHCA:

1.   Type of security:  $25,000,000 Gulf Coast Industrial  Development Authority
     ("GCIDA") exempt  facilities  industrial  revenue bonds (the "Bonds").  CST
     borrowed  the  entire  amount  of this  bond  issue  (interest  on which is
     generally  exempt from federal income tax by holders of the bonds) pursuant
     to a loan agreement  with GCIDA and subject to a Trust  Indenture for which
     The Bank of New York Trust Company, N.A. is the Trustee.

2.   Issue, renewal or guaranty: Issuance.

3.   Principal amount: $25,000,000.

4.   Annual rate of interest:  variable.  The initial interest rate was 1.3% per
     annum, which is subject to change on a weekly basis.

5.   Date of issue: May 12, 2004.

6.   Date of maturity: May 1, 2039.

7.   Acquirer of the Bonds: Goldman, Sachs & Co. The Bonds were sold by GCIDA to
     Goldman, Sachs & Co., as underwriter and remarketing agent for the Bonds.

8.   Collateral: the Bonds are secured by a Cinergy guaranty.

9.   Net proceeds to CST:  approximately  $24,500,000,  after payment of various
     costs of issuance, including the underwriter's discount.

10.  Use of  proceeds:  to  provide  funds  to CST  for  its  investment  in the
     construction  of certain solid waste  disposal and local  district  heating
     facilities  at a  cogeneration  plant located in Galveston  County,  Texas,
     owned by South Houston Green Power, L.P., an indirect subsidiary of CST.

11.  Exemption claimed: Rule 52(b).


                                            CST Green Power, L.P.
                                             By: CST General, LLC,
                                             General Partner

                                            By: /s/Wendy L. Aumiller
                                                Wendy L. Aumiller
                                          Treasurer of CST General, LLC
Dated:  May 19, 2004