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At end of first paragraph, add: Terms used but not otherwise defined herein
shall have such meaning as set forth in the Agreement.

Insert in "Credit or Other Special Provisions": On or before 5:00 p.m.
(Houston time) on Wednesday, May 17, 2000, Counterparty shall deliver to ENA
Performance Assurance in the form of a Letter of Credit in the amount of
$10,000 which amount shall be maintained in favor of ENA in accordance with
the terms of Annex A to the Agreement and which may be aggregated together
with other amounts required for other Transactions subject to the Agreement
in order to establish a single Letter of Credit. Further, at any time during
the term of this Transaction, upon the request of ENA in its sole discretion,
Counterparty shall deliver additional Performance Assurance in the form of a
Letter of Credit in the amount of $10,000, subject to the provisions of the
foregoing sentence. In addition to such Performance Assurance, Counterparty
shall establish, maintain, renew, substitute and increase such Performance
Assurance in accordance with the terms and provisions of Annex A to the
Agreement and the failure to do so shall constitute an Event of Default under
Section 5A(6) of the Agreement.