<PAGE>
                                                                  EXHIBIT 10.33

                            CONFIDENTIALITY AGREEMENT

         RAM Trading Ltd. ("Purchaser") understand and acknowledges that the
Securities Purchase Agreement and related documents (the "Offering Documents")
contain information that may be regarded as material non-public information
under Regulation FD under the Securities Act of 1933, as amended. Applicable
securities laws prohibit the Company from distributing the Offering Documents
without obtaining Purchaser's agreement to maintain the confidentiality of such
information and to not disclose such information to any person. In consideration
of the Company providing the Offering Documents to Purchaser, Purchaser hereby
acknowledges and agrees that the Offering Documents are confidential, are being
provided to Purchaser solely for the purpose of aiding Purchaser in Purchaser's
consideration of the terms thereof, and that other than as otherwise required by
law, rule or regulation, neither the Offering Documents nor any of the
information contained therein shall be disclosed to any person. You are strongly
cautioned that Federal law provides severe civil and criminal penalties for
trading in the public market on the basis of material non-public information.

         IN WITNESS WHEREOF, Purchaser acknowledges and agrees to abide by the
terms of this Confidentiality Agreement.

                                     RAM TRADING LTD:


                                     By:  /s/JAMES R. PARK
                                          -------------------------------------
                                          Name:    James R. Park
                                          Title:   Authorized Signatory
                                          Address: 2100 Enterprise Avenue
                                          -------------------------------------
                                                   Geneva, IL 60134
                                          -------------------------------------
August 27, 2003
--------------------------------
Date

<PAGE>

                          SECURITIES PURCHASE AGREEMENT


         THIS SECURITIES PURCHASE AGREEMENT (the "Agreement"), is made this 27th
day of August 2003, by and between Continental Southern Resources, Inc., a
Nevada corporation, ("Seller"), and RAM Trading, Ltd., a Cayman Island company
(the "Purchaser"),

WITNESSETH:

         WHEREAS, the Seller owns beneficially and of record 25.25 Units of
Limited Partnership Interest in Louisiana Shelf Partners, L.P., a Delaware
limited partnership (the "Company"); and

         WHEREAS, the Seller desires to sell, and Purchaser desires to purchase,
7 Units of Limited Partnership Interest from Seller (the "Interest") and 150,000
shares (the "Shares") of common stock, $.001 par value per share, of the Seller
(the "Common Stock") for the consideration and on the terms set forth herein.

         NOW, THEREFORE, for and in consideration of the premises and the mutual
covenants and agreements set forth in this Agreement and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the parties hereto agree as follows:

ARTICLE I  SALE AND TRANSFER OF SECURITIES

         1.1. Sale and Purchase of the Interest and Shares.

         In reliance upon the representations, warranties and covenants
contained in this Agreement, the Purchaser agrees to purchase the Interest and
Shares from the Seller, and the Seller agrees to sell, transfer, convey, assign
and deliver the Interest and Shares to the Purchaser, on the terms and
conditions set forth in this Agreement, such sale, transfer, conveyance,
assignment and delivery of the Interest and Shares causing the entire right,
title and interest in and to the Interest and Shares to be transferred
beneficially and of record to Purchaser, free and clear of any Encumbrances or
Rights of any kind or nature whatsoever.

         1.2. Purchase Price.

         The aggregate purchase price for the Interest and the Shares (the
"Purchase Price") shall be One Million Dollars ($1,000,000).

ARTICLE II CLOSING

         2.1 Closing Date.

         The closing of the transactions described in this Agreement (the
"Closing") shall take place at the office of the Seller or any other location
agreed to by the parties concurrent with the execution and delivery of this
Agreement.


                                       2

<PAGE>

         2.2 Closing Transactions.

         At the Closing, the following transactions shall occur, all of such
transactions being deemed to occur simultaneously:

         (a) The Seller shall deliver to the Purchaser the following:

              (1) A certificate or certificates, if any, representing all of the
Interest duly endorsed by the Seller in blank or accompanied by assignments
separate from the certificate duly endorsed in blank;

              (2) A certificate or certificates registered in the name of the
Purchaser evidencing the Shares; and

              (3) such other documents, agreements, consents, and approvals as
are required under this Agreement or as may be reasonably requested by the
Purchaser.

         (b) Purchaser will deliver to the Seller the following:

              (1) the Purchase Price by wire transfer of immediately available
funds; and

              (2) such other documents, agreements, consents, and approvals as
are required under this Agreement or as may be reasonably requested by the
Seller.

ARTICLE III REPRESENTATIONS AND WARRANTIES OF THE SELLER

         As a material inducement to Purchaser to execute this Agreement and
consummate the transactions contemplated hereby, the Seller represents to the
Purchaser that the following representations and warranties are true and
correct.

         3.1 Organization, Qualification and Status.

         The Seller is a duly organized and validly existing corporation in good
standing under the laws of the State of Nevada with adequate power and authority
to conduct the business in which it is now engaged, has the corporate power and
authority to execute, deliver and perform this Agreement, and is duly qualified
and licensed to do business as a foreign corporation in such other states or
jurisdictions as is necessary to enable it to carry on its business, except
where the failure to do so would not have a material adverse effect on its
business.

         3.2 Authority; Valid and Binding Obligation.

         The execution and delivery of this Agreement and the transactions
contemplated hereby have been duly authorized by the Board of Directors of the
Seller. No other corporate act or proceeding on the part of the Seller is
necessary to authorize this Agreement or the consummation of the transactions
contemplated hereby. This Agreement has been duly authorized, executed and
delivered by Seller and constitutes a legal, valid and binding obligation of
Seller enforceable against it in accordance with the terms hereof, except as
such enforceability may be limited by (i) bankruptcy, insolvency, moratorium,
reorganization or other similar laws


                                       3

<PAGE>

and legal and equitable principles limiting or affecting the rights of creditors
generally; and/or (ii) general principles of equity, regardless of whether
considered in a proceeding in equity or at law.

         3.3 Ownership of Interest.

         The Seller owns and holds, beneficially and of record, the entire
right, title and interest in and to the Interest and the Shares, free and clear
of Rights or Encumbrances of any kind or nature whatsoever. The Seller has the
full power and authority to vote, transfer and dispose of the Interest and the
Shares, free and clear of any Right or Encumbrance of any kind or nature
whatsoever other than restrictions under the Securities Act and applicable state
securities laws, and under the LP Agreement (as defined below). Other than the
transactions contemplated by this Agreement, there is no outstanding vote, plan,
pending proposal, or other right of any Person to acquire, or to cause the
redemption of, the Interest or the Shares or to effect the merger or
consolidation of the Company with or into any other Person.

         3.4 Limited Partnership Agreement.

         The copy of the Limited Partnership Agreement of the Company (the "LP
Agreement"), attached hereto as Exhibit A and made a part hereof is true,
correct and complete, and includes all amendments to the date hereof.

         3.5 Reservation of Shares.

         The Shares have been duly and validly authorized and when issued and
paid for in accordance with the terms hereof, shall be fully paid and non
assessable. An additional 650,000 shares of restricted Common Stock (the
"Additional Shares") have been duly authorized and reserved for issuance upon
the exercise of the Option (as defined in Section 7.1 hereof). Upon issuance and
payment therefore in accordance with the terms hereof, the Additional Shares
shall be duly and validly issued and fully paid and non assessable.

ARTICLE IV REPRESENTATIONS AND WARRANTIES OF PURCHASER

         As a material inducement to the Seller to execute this Agreement and to
consummate the transactions contemplated hereby, Purchaser represents to the
Seller that the following representations and warranties are true and correct.

         4.1 Organization and Qualification.

         Purchaser is a corporation duly organized, validly existing and in good
standing under the laws of its jurisdiction of incorporation. Purchaser has the
corporate power and authority to carry on its business as presently conducted.
Purchaser is duly qualified or licensed to do business and in good standing as a
foreign corporation in each of the jurisdictions in which the nature of its
business or the character of the properties and assets which it owns or leases
makes such qualification or licensing necessary except where failure to do so
would not have a material adverse effect on its business.

         4.2 Authorization; Valid and Binding Obligation.


                                       4

<PAGE>

         Purchaser has full corporate power and authority to execute and deliver
this Agreement and to perform its obligations hereunder and thereunder. This
Agreement has been duly authorized, executed and delivered by Purchaser and
constitutes a legal, valid and binding obligation of Purchaser, enforceable
against it in accordance with the terms hereof except as such enforceability may
be limited by (i) bankruptcy, insolvency, moratorium, reorganization or other
similar laws and legal and equitable principles limiting or affecting the rights
of creditors generally; and/or (ii) general principles of equity, regardless of
whether considered in a proceeding in equity or at law.

         4.5 Accredited Investor.

            The Purchaser has such knowledge and experience in business and
financial matters such that it is capable of evaluating the merits and risks of
purchasing the Interest and the Shares. Purchaser is an "accredited investor" as
that term is defined in Rule 501 of Regulation D of the Act

         4.6 Investment Intent.

                  The Purchaser hereby acknowledges that it has been advised
that neither the transfer of the Interest or the issuance of the Shares has been
registered with, or reviewed by, the Securities and Exchange Commission ("SEC"),
as such transactions are intended to be private transactions exempt from the
registration provisions of the Securities Act. The Purchaser represents that the
Interest and the Shares are being acquired for its own account and not on behalf
of any other person, for investment purposes only and not with a view towards
distribution. The Purchaser agrees that it will not attempt to sell, transfer,
assign, pledge or otherwise dispose of all or any portion of the Interest or the
Shares unless they are registered under the Securities Act and applicable state
securities laws or an exemption from such registration is available. The
Purchaser understands that neither the Interest nor the Shares has been
registered under the Securities Act and applicable state securities laws by
reason of a claimed exemption under the provisions of the Securities Act and
applicable state securities laws that depends, in part, upon the Seller's
investment intention.

         4.7 Access to Company Information.

         The Purchaser hereby acknowledges that it has had access to all
material and relevant information concerning the Company and its management,
financial condition, capitalization, market information, properties and
prospects, necessary to enable it to make an informed investment decision with
respect to its purchase of the Interests. The Purchaser acknowledges that it has
had the opportunity to ask questions of and receive answers from, and to obtain
additional information from, representatives of the Company concerning the
acquisition of the Interest, and the present and proposed business and financial
condition of the Company, and has had all such questions answered to its
satisfaction and has been supplied with all information requested.

         4.8 Access to Seller Information.


                                       5

<PAGE>

         The Seller hereby acknowledges that it has had access to all material
and relevant information concerning the Seller, and its management, financial
condition, capitalization, market information, properties and prospects,
necessary to enable it to make an informed investment decision with respect to
an investment in the Shares, including but not limited to, the Seller's Annual
Report on Form 10-KSB for the fiscal year ended December 31, 2002, which was
filed with the SEC on or about April 17, 2003 (the " Form 10-KSB") and the
Seller's Quarterly Report on Form 10-QSB for the three months ended March 31,
2003, which was filed with the SEC on May 16, 2003 (the "Form 10-QSB"). The
Purchaser has carefully read and reviewed, and is familiar with and understands
the contents of, the Form 10-KSB and Form 10-QSB, including, without limitation,
the "Risk Factors" set forth in the Form 10-KSB. The Purchaser acknowledges that
it has had the opportunity to ask questions of and receive answers from, and to
obtain additional information from, representatives of the Seller concerning the
present and proposed business and financial condition of the Seller, and has had
all such questions answered to its satisfaction and has been supplied with all
information requested.

         4.9 Legend on Certificates.

         The Purchaser understands and acknowledges that the Shares and any
certificates issued in replacement therefor shall bear the following legend, in
addition to any other legend required by law or otherwise:

                  "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
         REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR REGISTERED
         OR QUALIFIED UNDER APPLICABLE STATE SECURITIES LAWS. THE SECURITIES
         REPRESENTED BY THIS CERTIFICATE HAVE BEEN TAKEN BY THE REGISTERED OWNER
         FOR INVESTMENT, AND WITHOUT A VIEW TO RESALE OR DISTRIBUTION THEREOF,
         AND MAY NOT BE TRANSFERRED OR DISPOSED OF IN THE ABSENCE OF
         REGISTRATION OF THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS
         AMENDED, AND REGISTRATION OR QUALIFICATION OF THE SECURITIES UNDER
         APPLICABLE SECURITIES LAWS, OR RECEIPT OF AN OPINION OF COUNSEL
         SATISFACTORY TO THE ISSUER THAT SUCH REGISTRATION OR QUALIFICATION IS
         NOT REQUIRED.

The Purchaser further understands that the Interest is uncertificated and that
in the event certificates are issued to evidence the Interest, such certificates
will bear restrictive legends setting forth the transfer restrictions imposed by
the Securities Act and the LP Agreement.


         4.10 Disclosure.

         No representation or warranty of Purchaser in this Agreement contains
any untrue statement of a material fact, or omits to state a material fact
necessary to make the factual statements contained herein, in light of the
circumstances under which such statements are made, not misleading. Neither this
Agreement nor any other document, certificate, exhibit, statement or schedule
furnished or to be furnished by or on behalf of the Purchaser to the Seller in
connection with the transactions contemplated hereby contains or will contain
any untrue statement of a material fact, or omits or will omit to state a
material fact necessary to make the


                                       6

<PAGE>

factual statements contained therein, in light of the circumstances under which
they were made, not misleading.

ARTICLE V INDEMNIFICATION; SURVIVAL OF REPRESENTATIONS AND WARRANTIES

         The representations and warranties contained herein shall survive the
execution and delivery of this Agreement. Purchaser agrees to indemnify, hold
harmless and defend the Seller and its respective affiliates and agents with
respect to any and all loss, damage, expense, claim, action or liability any of
them may incur as a result of the breach or untruth of any representations or
warranties made by Purchaser herein, and Purchaser agrees that in the event of
any breach or untruth of any representations or warranties made by Purchaser
herein, the Seller may, at its option, forthwith rescind the sale of the
Interest and the Shares to Purchaser.


ARTICLE VI REGISTRATION RIGHTS

         The Purchaser shall be entitled to the rights and subject to the
obligations set forth in Article 6 of that certain Securities Purchase Agreement
dated May 23, 2003 by and between the Seller and Purchaser (the "SPA") with
respect to the Shares. If, in the judgment of Seller's counsel, the Purchaser is
not permitted by federal or state securities laws to participate in the
registration contemplated by Article 6 of the SPA, the Shares will be included
in the next registration statement filed by the Company (other than registration
statements on Form S-8, S-4 or any other SEC Form relating to compensatory plans
or business combinations) in accordance with the provisions of Article 6 of the
SPA.

ARTICLE VII ADDITIONAL AGREEMENTS OF THE PARTIES

         7.1 Option; Prohibition on Transfer. The Seller and Purchaser shall
have the following additional rights with respect to the Interest:

         (a) Option. Commencing at 9:00 a.m. on the 91st day after the date of
this Agreement (the "Commencement Date") and ending at 5:00 p.m. Eastern
Standard Time on August [___], 2004 (the "Termination Date"), Seller shall have
the right, exercisable in its sole discretion, to purchase the Interest from the
Purchaser (the "Call") and Purchaser shall have the right, exercisable in its
sole discretion, to sell the Interest to the Seller (the "Put" and together with
the Call, the "Option") at an exercise price (the "Exercise Price") equal to
$1,300,000, as appropriately adjusted to reflect any additional capital
contributions paid by Purchaser with respect to the Interest, by delivering
written notice ("Notice of Exercise") to the other party of its intention to
exercise this Option. The Notice of Exercise shall set forth a date on which the
Exercise Price shall be delivered to the Purchaser and the Interest transferred
to the Seller, which date shall be not less than five (5) nor more than ten (10)
days after the date of the Notice of Exercise. The Exercise Price shall be paid
by the issuance of the Additional Shares, subject to proportional adjustment in
the event that the Seller (i) pays a dividend or makes a distribution on its
shares of Common Stock in shares of Common Stock, (ii) subdivides or
reclassifies its outstanding Common Stock into a greater number of shares, or
(iii) combines or reclassifies its


                                       7

<PAGE>

outstanding Common Stock into a smaller number of shares, unless both parties
mutually agree that the loan will be repaid by wire transfer from Seller to
Purchaser.

         (b) Commencing on the date hereof and ending on the Termination Date,
the Purchaser shall not and shall not enter into any agreement to sell, assign,
pledge, hypothecate, grant any other property interest, whether contingent or
otherwise, with respect to, or otherwise transfer, all or any part of the
Interest and shall not grant and shall not enter into any agreement to grant any
subscription, warrant, option, voting agreement, voting trust, proxy, or other
arrangement or commitment obligating or which may obligate it to dispose of or
vote the Interest in whole or in part to any Person.

         7.2 Consent of General Partner.

         LS Gas, LLC, the general partner of the Company, hereby consents to the
transfer of the Interest by Seller pursuant to the terms of this Agreement and
the issuance and any exercise of the Option by the Seller or Purchaser.

         7.3 Prohibition on Trading in Purchaser Common Stock.

         The Purchaser acknowledges that the United States securities laws
prohibit any person who has received material non-public information concerning
the matters which are the subject matter of this Agreement from purchasing or
selling the securities of the Seller, or from communicating such information to
any person under circumstances in which it is reasonably foreseeable that such
person is likely to purchase or sell securities of Seller. Accordingly, the
Purchaser agrees that it will comply with such securities laws.

         7.4 Further Acts and Assurances.

          The parties agree that, at any time and from time to time, on and
after the Closing, upon the reasonable request of the other party, they will do
or cause to be done all such further acts and things and execute, acknowledge
and deliver, or cause to be executed, acknowledged and delivered, any and all
papers, documents, instruments, agreements, assignments, transfers, assurances
and conveyances as may be necessary or desirable to carry out and give effect to
the provisions and intent of this Agreement.


         7.5 Public Announcements.

         Neither the Seller nor the Purchaser shall disclose to the public or to
any third party the existence of this Agreement, the terms hereof or the
transactions contemplated hereby, or any other material non-public information
concerning or relating to the other party hereto, other than with the express
prior written consent of the other party hereto, except as may be required by
law or court order, except to enforce the rights of such disclosing party under
this Agreement; and except that Seller shall have the right to make such public
disclosures of this Agreement and the transactions contemplated hereby as it
determines are necessary or appropriate under federal or state securities laws;
provided, however, that notwithstanding anything to the contrary contained in
this Agreement, any party hereto may disclose this Agreement to any of its
directors, officers,


                                       8

<PAGE>

employees, shareholders, affiliates, agents and representatives who need to know
such information for the sole purpose of evaluating, or performing the party`s
obligations or exercising the party's rights under, this Agreement, and to any
party whose consent is required in connection with this Agreement.

ARTICLE VIII MISCELLANEOUS

         8.1 Definitions

         For purposes of this Agreement, the following terms have the meanings
specified:

         "Encumbrance" means and includes:

              (i) with respect to any personal property, any intangible property
or any property other than real property, any security or other property
interest or right, claim, lien, pledge, option, charge, including, without
limitation, any outstanding additional capital contribution with respect to the
Interest, security interest, contingent or conditional sale, or other title
claim or retention agreement or lease or use agreement in the nature thereof,
interest or other right or claim of third parties, whether voluntarily incurred
or arising by operation of law, and including any agreement to grant or submit
to any of the foregoing in the future; and

              (ii) with respect to any real property (whether and including
owned real estate or leased real estate), any mortgage, lien, easement,
interest, right-of-way, condemnation or eminent domain proceeding, encroachment,
any building, use or other form of restriction, encumbrance or other claim
(including adverse or prescriptive) or right of third parties (including
Governmental Authorities), any lease or sublease, boundary dispute, and
agreements with respect to any real property including: purchase, sale, right of
first refusal, option, construction, building or property service, maintenance,
property management, conditional or contingent sale, use or occupancy, franchise
or concession, whether voluntarily incurred or arising by operation of law, and
including any agreement to grant or submit to any of the foregoing in the
future.

         "Governmental Authority" means any:

              (i) nation, state, county, city, town, village, district or other
jurisdiction of any nature;

              (ii) federal, state, local, municipal, foreign or other
government;

              (iii) governmental or quasi-governmental authority of any nature
(including any governmental agency, branch, board, commission, department,
instrumentality, office or other entity, and any court or other tribunal);

              (iv) multi-national organization or body; and/or

              (v) body exercising, or entitled or purporting to exercise, any
administrative, executive, judicial, legislative, police, regulatory or taxing
authority or power of any nature.


                                       9

<PAGE>

          "Indebtedness" means (i) all outstanding bank and other loans, notes,
lines of credit, capital leases or debt instruments, and (ii) all other
indebteness, excluding trade payables, operating leases and other current
liabilities.

         "Liability" or "Liabilities" means any and all debts, liabilities
and/or obligations of any type, nature or description (whether known or unknown,
asserted or unasserted, secured or unsecured, absolute or contingent, accrued or
unaccrued, liquidated or unliquidated and whether due or to become due).

         "Person" means any individual, corporation (including any non-profit
corporation), general, limited or limited liability partnership, limited
liability company, joint venture, estate, trust, association, organization, or
other entity or Governmental Authority.

         "Rights" means any and all outstanding subscriptions, warrants,
options, voting agreements, voting trusts, proxies, or other arrangements or
commitments obligating or which may obligate a Person to dispose of or vote any
securities, including, without limitation, the Interest or the Shares.

         "SEC" means the Securities and Exchange Commission.

         "Securities Act" means the Securities Act of 1933, as amended.

         8.2 Notices. All notices, requests, consents or other communications
required or permitted hereunder shall be in writing and shall be hand delivered
or mailed, first class postage prepaid, by registered or certified mail to the
following addresses:


                  If to the Seller:
                  ----------------

                           Continental Southern Resources, Inc.
                           111 Presidential Boulevard, Suite 158-A
                           Bala Cynwyd, PA 19004
                           Attention:  Chief Executive Officer and

                  With a copy to:
                  --------------

                           Spector Gadon & Rosen, P.C.
                           Seven Penn Center
                           1635 Market Street, 7th Floor
                           Philadelphia, PA 19103
                           Attention:  Vincent A. Vietti, Esquire

                  In the case of Purchaser:
                  ------------------------

                           To that address indicated on the signature page
hereof.

         Unless specified otherwise, such notices and other communications shall
for all purposes of this Agreement be treated as being effective upon being
delivered personally or, if sent by


                                       10

<PAGE>

mail, five days after the same has been deposited in a regularly maintained
receptacle for the deposit of United States mail, addressed as set forth above,
and postage prepaid.

         8.3 Entire Agreement; Assignment.

         This Agreement, including all Exhibits hereto, constitutes the entire
Agreement between the parties with respect to its subject matter and supersedes
all prior agreements and understandings, both written and oral, among the
parties or any of them with respect to such subject matter. Neither party may
assign this Agreement or any of its or his rights hereunder without the prior
written consent of the other parties.

         8.4 Binding Effect; Benefit.

         This Agreement shall inure to the benefit of and be binding upon the
parties and their respective successors and assigns. Nothing in this Agreement
is intended to confer on any person other than the parties to this Agreement or
their respective successors and assigns any rights, remedies, obligations or
liabilities under or by reason of this Agreement.

         8.5 Headings.

         The descriptive headings of the sections of this Agreement are inserted
for convenience only, do not constitute a part of this Agreement and shall not
affect in any way the meaning or interpretation of this Agreement.

         8.6 Counterparts.

         This Agreement may be executed in two or more counterparts and
delivered via facsimile, each of which shall be deemed to be an original, and
all of which together shall be deemed to be one and the same instrument.

         8.7 Governing Law.

         This Agreement shall be governed by and construed in accordance with
the laws of the Commonwealth of Pennsylvania, without regard to the laws that
might otherwise govern under principles of conflicts of laws applicable thereto.

         8.8 Severability.

         If any term, provision, covenant or restriction of this Agreement is
held by a court of competent jurisdiction or other authority to be invalid,
void, unenforceable or against its regulatory policy, the remainder of this
Agreement shall remain in full force and effect and shall in no way be affected,
impaired or invalidated.

         8.9 Amendment and Modification.

         This Agreement may not be amended except by an instrument in writing
signed on behalf of Purchaser and the Seller.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

<PAGE>

         IN WITNESS WHEREOF, each of the parties has executed or caused this
Agreement to be executed as of the date first above written.

                                  CONTINENTAL SOUTHERN RESOURCES,  INC.



                                  By:  /s/ STEPHEN P. HARRINGTON
                                     ------------------------------------------
                                     Authorized Executive Officer



                                  RAM TRADING LTD.


                                  By:  /s/JAMES R. PARK
                                     ------------------------------------------
                                      Authorized Signatory
                                  Address: 2100 Enterprise Avenue
                                  ---------------------------------------------
                                           Geneva, IL 60134
                                  ---------------------------------------------

                                  LOUISIANA SHELF PARTNERS, L.P. solely for the
                                  purpose of Section 7.2 hereof

                                  By: LS Gas, LLC., its General Partner


                                  By: /s/ MARK A. BUSH
                                     ------------------------------------------
                                     Manager


                                       12

<PAGE>

                                    EXHIBIT A

         LIMITED PARTNERSHIP AGREEMENT OF LOUISIANA SHELF PARTNERS, L.P.