Document:

exv4w3

 

EXHIBIT 4.3

SECOND AMENDMENT TO

MULTI-YEAR REVOLVING CREDIT AGREEMENT

     THIS SECOND AMENDMENT TO MULTI-YEAR REVOLVING CREDIT AGREEMENT (this “Second
Amendment”) is made and entered into as of the 22nd day of June, 2006 (the
“Second Amendment Effective Date”), among ENTERPRISE PRODUCTS OPERATING L.P., a Delaware
limited partnership (“Borrower”); WACHOVIA BANK, NATIONAL ASSOCIATION, as administrative
agent (in such capacity, the “Administrative Agent”) for each of the lenders (the
“Lenders”) that is a signatory or which becomes a signatory to the hereinafter defined
Credit Agreement; and the Lenders party hereto.

R E C I T A L S:

     A. On August 25, 2004, the Borrower, the Lenders and the Administrative Agent entered into a
certain Multi-Year Revolving Credit Agreement, amended by that certain First Amendment to
Multi-Year Revolving Credit Agreement dated October 5, 2005 (the “Credit Agreement”)
whereby, upon the terms and conditions therein stated, the Lenders agreed to make certain Loans (as
defined in the Credit Agreement) and extend certain credit to the Borrower.

     B. The parties hereto mutually desire to amend the Credit Agreement as hereinafter set forth.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements herein contained, the
Borrower, the Lenders party hereto and the Administrative Agent hereby agree as follows:

     1. Certain Definitions.

     1.1 Terms Defined Above. As used in this Second Amendment, the terms “Administrative
Agent”, “Borrower”, “Credit Agreement”, “Second Amendment” and “Second Amendment Effective Date”,
shall have the meanings indicated above.

     1.2 Terms Defined in Agreement. Unless otherwise defined herein, all terms beginning
with a capital letter which are defined in the Credit Agreement shall have the same meanings herein
as therein unless the context hereof otherwise requires.

     2. Amendments to Credit Agreement.

     2.1 Defined Terms.

     (a) The term “Agreement,” as defined in Section 1.01 of the Credit Agreement, is hereby
amended to mean the Credit Agreement, as amended and supplemented by this Second Amendment and as
the same may from time to time be further amended or supplemented.

     (b) The definition of “Consolidated Net Worth” as defined in Section 1.01 of the Credit
Agreement is hereby amended in its entirety to read as follows:

     “Consolidated Net Worth” means as to any Person, at any date of determination,
the sum of (i) preferred stock (if any), (ii) an amount equal to (a) the face amount of
outstanding Hybrid Securities not in excess of 15% of Consolidated Total Capitalization
times (b) sixty-two and one-half percent (62.5%), (iii) par value of common stock,
(iv)

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capital in excess of par value of common stock, (v) partners’ capital or equity, and
(vi) retained earnings, less treasury stock (if any), of such Person, all as determined on a
consolidated basis.

     2.2 Additional Defined Terms. Section 1.01 of the Credit Agreement is hereby further
amended and supplemented by adding the following new definitions, which read in their entirety as
follows:

     “Commercial Operation Date” means the date on which a Material Project is
substantially complete and commercially operable.

     “Consolidated Total Capitalization” means the sum of (i) Consolidated
Indebtedness and (ii) Borrower’s Consolidated Net Worth.

     “Hybrid Securities” means any trust preferred securities, or deferrable
interest subordinated debt with a maturity of at least 20 years, which provides for the
optional or mandatory deferral of interest or distributions, issued by the Borrower, or any
business trusts, limited liability companies, limited partnerships or similar entities (i)
substantially all of the common equity, general partner or similar interests of which are
owned (either directly or indirectly through one or more wholly owned Subsidiaries) at all
times by the Borrower or any of its Subsidiaries, (ii) that have been formed for the purpose
of issuing hybrid securities or deferrable interest subordinated debt, and (iii)
substantially all the assets of which consist of (A) subordinated debt of the Borrower or a
Subsidiary of the Borrower, and (B) payments made from time to time on the subordinated
debt.

     “LIBOR Market Index Rate” means, for any day, with respect to any LMIR
Borrowing or LMIR Loan (a) the rate per annum appearing on Page 3750 of the Bridge Telerate
Service (formerly Dow Jones Market Service) (or on any successor or substitute page of such
Service, or any successor to or substitute for such Service, providing rate quotations
comparable to those currently provided on such page of such Service, as determined by the
Swingline Lender from time to time for purposes of providing quotations of interest rates
applicable to dollar deposits in the London interbank market) at approximately 11:00 a.m.,
London time for such day, provided, if such day is not a Business Day, the immediately
preceding Business Day, as the rate for dollar deposits with a one-month maturity; (b) if
for any reason the rate specified in clause (a) of this definition does not so appear on
Page 3750 of the Bridge Telerate Service (or any successor or substitute page or any such
successor to or substitute for such Service), the rate per annum appearing on Reuters Screen
LIBO page (or any successor or substitute page) as the London interbank offered rate for
deposits in dollars at approximately 11:00 a.m., London time, for such day, provided, if
such day is not a Business Day, the immediately preceding Business Day, for a one-month
maturity; and (c) if the rate specified in clause (a) of this definition does not so appear
on Page 3750 of the Bridge Telerate Service (or any successor or substitute page or any such
successor to or substitute for such Service) and if no rate specified in clause (b) of this
definition so appears on Reuters Screen LIBO page (or any successor or substitute page), the
average of the interest rates per annum at which dollar deposits of $5,000,000 and for a
one-month maturity are offered by the respective principal London offices of the Reference
Banks in immediately available funds in the London interbank market at approximately 11:00
a.m., London time, for such day.

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     “LMIR”, when used in reference to any Loan or Borrowing, refers to a Loan, or
Loans, in the case of a Borrowing, which bear interest at a rate determined by reference to
the LIBOR Market Index Rate.

     “Material Project” means the construction or expansion of any capital project
of the Borrower or any of its Subsidiaries, the aggregate capital cost of which exceeds
$50,000,000.

     “Material Project EBITDA Adjustments” shall mean, with respect to each Material
Project:

     (A) prior to the Commercial Operation Date of a Material Project (but including the
fiscal quarter in which such Commercial Operation Date occurs), a percentage (based on the
then-current completion percentage of such Material Project) of an amount to be approved by
the Administrative Agent as the projected Consolidated EBITDA of Borrower and its
Subsidiaries attributable to such Material Project for the first 12-month period following
the scheduled Commercial Operation Date of such Material Project (such amount to be
determined based on customer contracts or tariff-based customers relating to such Material
Project, the creditworthiness of the other parties to such contracts or such tariff-based
customers, and projected revenues from such contracts, tariffs, capital costs and expenses,
scheduled Commercial Operation Date, oil and gas reserve and production estimates, commodity
price assumptions and other factors deemed appropriate by Administrative Agent), which may,
at the Borrower’s option, be added to actual Consolidated EBITDA for the Borrower and its
Subsidiaries for the fiscal quarter in which construction of such Material Project commences
and for each fiscal quarter thereafter until the Commercial Operation Date of such Material
Project (including the fiscal quarter in which such Commercial Operation Date occurs, but
net of any actual Consolidated EBITDA of the Borrower and its Subsidiaries attributable to
such Material Project following such Commercial Operation Date); provided that if
the actual Commercial Operation Date does not occur by the scheduled Commercial Operation
Date, then the foregoing amount shall be reduced, for quarters ending after the scheduled
Commercial Operation Date to (but excluding) the first full quarter after its Commercial
Operation Date, by the following percentage amounts depending on the period of delay (based
on the period of actual delay or then-estimated delay, whichever is longer): (i) 90 days or
less, 0%, (ii) longer than 90 days, but not more than 180 days, 25%, (iii) longer than 180
days but not more than 270 days, 50%, and (iv) longer than 270 days, 100%; and

     (B) beginning with the first full fiscal quarter following the Commercial Operation
Date of a Material Project and for the two immediately succeeding fiscal quarters, an amount
to be approved by the Administrative Agent as the projected Consolidated EBITDA of Borrower
and its Subsidiaries attributable to such Material Project (determined in the same manner as
set forth in clause (A) above) for the balance of the four full fiscal quarter period
following such Commercial Operation Date, which may, at the Borrower’s option, be added to
actual Consolidated EBITDA for the Borrower and its Subsidiaries for such fiscal quarters.

     Notwithstanding the foregoing:

     (i) no such additions shall be allowed with respect to any Material Project unless:

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     (a) not later than 30 days prior to the delivery of any certificate required by
the terms and provisions of Section 5.01(e) to the extent Material Project EBITDA
Adjustments will be made to Consolidated EBITDA in determining compliance with
Section 6.07(b), the Borrower shall have delivered to the Administrative Agent
written pro forma projections of Consolidated EBITDA of the Borrower and its
Subsidiaries attributable to such Material Project and

     (b) prior to the date such certificate is required to be delivered, the
Administrative Agent shall have approved (such approval not to be unreasonably
withheld) such projections and shall have received such other information and
documentation as the Administrative Agent may reasonably request, all in form and
substance satisfactory to the Administrative Agent, and

     (ii) the aggregate amount of all Material Project EBITDA Adjustments during any period
shall be limited to 15% of the total actual Consolidated EBITDA of the Borrower and its
Subsidiaries for such period (which total actual Consolidated EBITDA shall be determined
without including any Material Project EBITDA Adjustments).

     “Second Amendment” means that certain Second Amendment to Multi-Year Revolving
Credit Agreement dated as of June 22, 2006, among the Borrower, the Lenders party thereto
and the Administrative Agent.

     “Second Amendment Effective Date” means June 22, 2006.

     2.3 Eurodollar Revolving Borrowings. The reference to “six Eurodollar Revolving
Borrowings” set forth in the proviso at the end of the last sentence of Section 2.02(c) of the
Credit Agreement is hereby amended in its entirety to refer instead to “twelve Eurodollar Revolving
Borrowings”.

     2.4 Swingline Loans.

     (a) The reference to “outstanding Swingline Loans exceeding $20,000,000” set forth in
subclause (i) of the first sentence of Section 2.05(a) of the Credit Agreement is hereby amended in
its entirety to refer instead to “outstanding Swingline Loans exceeding $75,000,000”.

     (b) The second sentence of Section 2.02(b) of the Credit Agreement is hereby amended in its
entirety to read as follows:

Each Swingline Loan shall (i) prior to the acquisition by any Lender of a participation
therein pursuant to Section 2.05(c), be an LMIR Loan, and (ii) upon and following the
acquisition by any Lender of a participation therein, be an ABR Loan.

     (c) Section 2.13(a) of the Credit Agreement is hereby amended in its entirety to read as
follows:

     (a) The Loans comprising each ABR Borrowing shall bear interest on each day at the
Alternate Base Rate for such day. The Loans comprising each Swingline Loan shall (i) prior
the acquisition by any Lender of a participation therein pursuant to Section 2.05(c), bear
interest on each day at the LIBOR Market Index Rate for such day plus an amount
equal to the “Eurodollar Spread” set forth in the pricing grid set forth in the

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defined term “Applicable Rate” that would be applicable to Eurodollar Revolving Loans
on such day, and (ii) upon and following the acquisition by any Lender of a participation
therein, bear interest on each day at the Alternate Base Rate for such day.

     2.5 Restrictive Agreements. Section 6.06 of the Credit Agreement is hereby amended
and supplemented by adding a new clause (xiii) at the end thereof, to read as follows:

or (xiii) that is a Hybrid Security or an indenture, document, agreement or security entered
into or issued in connection with a Hybrid Security or otherwise constituting a restriction
or condition on the payment of dividends or distributions by an issuer of a Hybrid Security.

     2.6 Financial Covenants. Section 6.07(b) of the Credit Agreement is hereby amended
and supplemented by adding a new paragraph at the end thereof, to read as follows:

In addition, for purposes of this Section 6.07(b), Hybrid Securities up to an aggregate
amount of 15% of Consolidated Total Capitalization shall be excluded from Consolidated
Indebtedness and Consolidated EBITDA may include, at Borrower’s option, any Material Project
EBITDA Adjustments as provided in the definition thereof.

     2.7 Swingline Loan Note. Exhibit I to the Credit Agreement is hereby amended in its
entirety to read as set forth on Exhibit I attached hereto.

     2.8 Extension of Maturity Date. Borrower has, pursuant to Section 2.01(c) of the
Credit Agreement requested a one-year extension of the Maturity Date and that the notice
requirement with respect thereto be waived. Each Lender a party hereto hereby consents to a
one-year extension of the Maturity Date to October 5, 2011 and waives the notice requirement set
forth in such Section 2.01(c) with respect thereto. Furthermore, each Lender a party hereto hereby
agrees that following the effectiveness hereof, Borrower shall continue to have the right to make
up to two (2) additional requests for one-year extensions of the Maturity Date under Section
2.01(c).

     2.9 Conditions Precedent. The obligation of the Lenders party hereto and the
Administrative Agent to enter into this Second Amendment shall be conditioned upon the following
conditions precedent:

     (a) The Administrative Agent shall have received a copy of this Second Amendment, duly
completed and executed by the Borrower and Required Lenders; and acknowledged and ratified by the
Limited Partner pursuant to a duly executed Acknowledgement and Ratification in the form of Exhibit
A attached hereto;

     (b) The Administrative Agent shall have received favorable written opinions (addressed to the
Administrative Agent and the Lenders and dated the Second Amendment Effective Date) of Richard
Bachmann, in-house counsel for Borrower and the Limited Partner, and Bracewell & Giuliani LLP,
counsel for Borrower and the Limited Partner, substantially in the forms delivered in connection
with the First Amendment and reasonably satisfactory to the Administrative Agent and its counsel.

     (c) The Administrative Agent shall have received such documents and certificates as the
Administrative Agent or its counsel may reasonably request relating to (1) the organization

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and existence of the Borrower and the Limited Partner, (2) the authorization of this Second
Amendment and any other legal matters relating to the Borrower, this Second Amendment or the Credit
Agreement, all in form and substance reasonably satisfactory to the Administrative Agent and its
counsel, and (3) with respect to the Limited Partner, the authorization of the Ratification and
Acknowledgement of Limited Partner attached hereto, and any other legal matters relating to the
Limited Partner.

     (d) The Swingline Lender shall have received a swingline loan note, duly completed and
executed by the Borrower.

     (e) The Administrative Agent shall have received a certificate, dated the Second Amendment
Effective Date and signed by the President, an Executive Vice President or a Financial Officer of
the Borrower, confirming compliance with the conditions set forth in paragraphs (a) and (b) of
Section 4.02 of the Credit Agreement, as amended hereby, and Section 2.9(g) hereof.

     (f) The Administrative Agent shall have received all fees and other amounts due and payable on
or prior to the Second Amendment Effective Date, including, to the extent invoiced five (5)
Business Days prior to closing, reimbursement or payment of all out-of-pocket expenses required to
be reimbursed or paid by the Borrower hereunder.

     (g) As of the Second Amendment Effective Date, no Material Adverse Change exists.

     (h) The Administrative Agent shall have received such other information, documents or
instruments as it or its counsel may reasonably request.

     3. Representations and Warranties. The Borrower represents and warrants that:

     (a) there exists no Default or Event of Default, or any condition or act which constitutes, or
with notice or lapse of time or both would constitute, an Event of Default under the Credit
Agreement, as hereby amended and supplemented;

     (b) the Borrower has performed and complied with all covenants, agreements and conditions
contained in the Credit Agreement, as hereby amended and supplemented, required to be performed or
complied with by it; and

     (c) the representations and warranties of the Borrower contained in the Credit Agreement, as
hereby amended and supplemented, were true and correct in all material respects when made, and are
true and correct in all material respects at and as of the time of delivery of this Second
Amendment, except to the extent such representations and warranties relate to an earlier date, in
which case such representations and warranties were true and correct in all material respects as of
such earlier date.

     4. Extent of Amendments. Except as expressly herein set forth, all of the terms,
conditions, defined terms, covenants, representations, warranties and all other provisions of the
Credit Agreement are herein ratified and confirmed and shall remain in full force and effect.

     5. Counterparts. This Second Amendment may be executed in two or more counterparts,
and it shall not be necessary that the signatures of all parties hereto be contained on any one
counterpart hereof; each counterpart shall be deemed an original, but all of which together shall
constitute one and the same instrument.

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     6. References. On and after the Second Amendment Effective Date, the terms
“Agreement”, “hereof”, “herein”, “hereunder”, and terms of like import when used in the Credit
Agreement shall, except where the context otherwise requires, refer to the Credit Agreement, as
amended and supplemented by this Second Amendment.

     7. Governing Law. This Second Amendment shall be governed by and construed in
accordance with the laws of the State of New York and applicable federal law.

     THIS SECOND AMENDMENT, THE CREDIT AGREEMENT, AS AMENDED HEREBY, THE NOTES AND THE OTHER LOAN
DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE
OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

     THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

     This Second Amendment shall benefit and bind the parties hereto, as well as their respective
assigns, successors, heirs and legal representatives.

[Signatures Begin on Next Page]

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     EXECUTED as of the Second Amendment Effective Date.

	 	 	 	 	 	 	 
	 	 	BORROWER:	 	 
	 
	 	 	 	 	 	 
	 	 	ENTERPRISE PRODUCTS OPERATING L.P.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	Enterprise Products OLPGP, Inc.,	 	 
	 

	 	 	 	General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ W. Randall Fowler	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	W. Randall Fowler	 	 
	 

	 	Title:
	 	Senior Vice President and Treasurer	 	 

 

 

	 	 	 	 	 	 	 
	 	 	WACHOVIA BANK,	 	 
	 	 	NATIONAL ASSOCIATION,	 	 
	 	 	Individually, as Administrative Agent,

as Issuing Bank and as Swingline Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Shannan Townsend	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Shannan Townsend	 	 
	 

	 	Title:
	 	Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	CITIBANK, N.A.	 	 
	 	 	Individually and as Co-Syndication Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Todd J. Mogil	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Todd J. Mogil	 	 
	 

	 	Title:
	 	Attorney-in-Fact	 	 

 

 

	 	 	 	 	 	 	 
	 	 	JPMORGAN CHASE BANK,	 	 
	 	 	Individually and as Co-Syndication Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Dianne L. Russell	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Dianne L. Russell	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	MIZUHO CORPORATE BANK, LTD.,	 	 
	 	 	Individually and as Co-Documentation Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Raymond Ventura	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Raymond Ventura	 	 
	 

	 	Title:
	 	Deputy General Manager	 	 

 

 

	 	 	 	 	 	 	 
	 	 	SUNTRUST BANK,	 	 
	 	 	Individually and as Co-Documentation Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Peter Panos	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Peter Panos	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	THE BANK OF NOVA SCOTIA,	 	 
	 	 	Individually and as Co-Documentation Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ V. H. Gibson	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	V. H. Gibson	 	 
	 

	 	Title:
	 	Assistant Agent	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BARCLAYS BANK PLC,	 	 
	 	 	Individually and as a Senior Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Nicholas Bell	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Nicholas Bell	 	 
	 

	 	Title:
	 	Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BAYERISCHE HYPO-UND VEREINSBANK	 	 
	 	 	AG, NEW YORK BRANCH, Individually and as	 	 
	 	 	a Senior Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Yoram Dankner	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Yoram Dankner	 	 
	 

	 	Title:
	 	Managing Director	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Shannon Batchman	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Shannon Batchman	 	 
	 

	 	Title:
	 	Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BMO CAPITAL MARKETS FINANCING, INC.,	 	 
	 	 	Individually and as a Senior Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Cahal Carmody	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Cahal Carmody	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	THE ROYAL BANK OF SCOTLAND plc,	 	 
	 	 	Individually and as a Senior Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Matthew Main	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Matthew Main	 	 
	 

	 	Title:
	 	Managing Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BANK OF AMERICA, N.A.,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Zewditu Menelik	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Zewditu Menelik	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	THE BANK OF TOKYO-MITSUBISHI UFJ,	 	 
	 	 	LTD., HOUSTON AGENCY,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Kelton Glasscock	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Kelton Glasscock	 	 
	 

	 	Title:
	 	Vice President & Manager	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BNP PARIBAS,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ J. Onischuk	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	J. Onischuk	 	 
	 

	 	Title:
	 	Director	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Greg Smothers	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Greg Smothers	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	LEHMAN COMMERCIAL PAPER INC.,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Janine M. Shugan	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Janine M. Shugan	 	 
	 

	 	Title:
	 	Authorized Signatory	 	 

 

 

	 	 	 	 	 	 	 
	 	 	MORGAN STANLEY BANK,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Daniel Twenge	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Daniel Twenge	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	UBS LOAN FINANCE LLC,	 	 
	 	 	Individually and as a Managing Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Richard L. Tavrow	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Richard L. Tavrow	 	 
	 

	 	Title:
	 	Director	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Irja R. Otsa	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Irja R. Otsa	 	 
	 

	 	Title:
	 	Associate Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	SOCIETE GENERALE,	 	 
	 	 	Individually and as Co-Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Stephen W. Warfel	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Stephen W. Warfel	 	 
	 

	 	Title:
	 	Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	GOLDMAN SACHS CREDIT PARTNERS L.P.,	 	 
	 	 	a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Pedro Ramirez	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Pedro Ramirez	 	 
	 

	 	Title:
	 	Authorized Signatory	 	 

 

 

	 	 	 	 	 	 	 
	 	 	ING CAPITAL LLC, a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Richard Ennis	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Richard Ennis	 	 
	 

	 	Title:
	 	Managing Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	SUMITOMO MITSUI BANKING	 	 
	 	 	CORPORATION, a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ William M. Ginn	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	William M. Ginn	 	 
	 

	 	Title:
	 	General Manager	 	 

 

 

	 	 	 	 	 	 	 
	 	 	BAYERISCHE LANDESBANK,	 	 
	 	 	NEW YORK BRANCH,	 	 
	 	 	Individually and as Co-Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Stephen Christenson	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Stephen Christenson	 	 
	 

	 	Title:
	 	First Vice President	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Norman McClave	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Norman McClave	 	 
	 

	 	Title:
	 	First Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	DNB NOR BANK ASA,	 	 
	 	 	Individually and as Co-Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Philip F. Kurpiewski	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Philip F. Kurpiewski	 	 
	 

	 	Title:
	 	Senior Vice President	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Giacomo Landi	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Giacomo Landi	 	 
	 

	 	Title:
	 	First Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	ROYAL BANK OF CANADA,	 	 
	 	 	Individually and as Co-Agent	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ David McCluskey	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	David McCluskey	 	 
	 

	 	Title:
	 	Authorized Signatory	 	 

 

 

	 	 	 	 	 	 	 
	 	 	MERRILL LYNCH BANK USA, a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Louis Alder	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Louis Alder	 	 
	 

	 	Title:
	 	Director	 	 

 

 

	 	 	 	 	 	 	 
	 	 	WELLS FARGO BANK,	 	 
	 	 	NATIONAL ASSOCIATION, a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Jo Ann Vasquez	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Jo Ann Vasquez	 	 
	 

	 	Title:
	 	Vice President	 	 

 

 

	 	 	 	 	 	 	 
	 	 	CAPITAL ONE, N.A., a Lender	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Nancy G. Morages	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Nancy G. Morages	 	 
	 

	 	Title:
	 	Senior Vice President	 	 

 

 

EXHIBIT A

ACKNOWLEDGMENT AND RATIFICATION OF GUARANTOR

     The undersigned (“Guarantor”) hereby expressly (i) acknowledges the terms of the
foregoing Second Amendment to Multi-Year Revolving Credit Agreement; (ii) ratifies and affirms its
obligations under its Guaranty Agreement dated as of August 25, 2004, in favor of the
Administrative Agent; (iii) acknowledges, renews and extends its continued liability under said
Guaranty Agreement and Guarantor hereby agrees that its Guaranty Agreement remains in full force
and effect; and (iv) guarantees to the Administrative Agent the prompt payment when due of all
amounts owing or to be owing by it under its Guaranty Agreement pursuant to the terms and
conditions thereof, as modified hereby.

     The foregoing acknowledgment and ratification of the undersigned Guarantor shall be evidenced
by signing the space provided below, to be effective as of the Second Amendment Effective Date.

	 	 	 	 	 	 	 
	 	 	ENTERPRISE PRODUCTS PARTNERS L.P.,	 	 
	 	 	a Delaware limited partnership	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	Enterprise Products GP, LLC,	 	 
	 

	 	 	 	General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ W. Randall Fowler	 	 
	 

	 	 	 	 	 	 
	 

	 	 	 	W. Randall Fowler	 	 
	 

	 	 	 	Senior Vice President and Treasurer	 	 

 

 

EXHIBIT I

FORM OF

SWINGLINE LOAN NOTE

(Multi-Year Credit Facility)

			
	$75,000,000.00
	 	June 22, 2006

     ENTERPRISE PRODUCTS OPERATING L.P., a Delaware limited partnership (the “Borrower”),
for value received, promises and agrees to pay to WACHOVIA BANK, NATIONAL ASSOCIATION, as Swingline
Lender under the Credit Agreement, as hereafter defined (the “Swingline Lender”), or order,
at the payment office of WACHOVIA BANK, NATIONAL ASSOCIATION, as Administrative Agent, at 301 South
College Street, Charlotte, North Carolina 28288-0608, the principal sum of SEVENTY-FIVE MILLION AND
NO/100 DOLLARS ($75,000,000.00), or such lesser amount as shall equal the aggregate unpaid
principal amount of the Swingline Loans owed to the Swingline Lender under the Credit Agreement,
in lawful money of the United States of America and in immediately available funds, on the dates
and in the principal amounts provided in the Credit Agreement, and to pay interest on the unpaid
principal amount as provided in the Credit Agreement for such Swingline Loans, at such office, in
like money and funds, for the period commencing on the date of each such Swingline Loan until such
Swingline Loan shall be paid in full, at the rates per annum and on the dates provided in the
Credit Agreement.

     This note evidences the Swingline Loans owed to the Swingline Lender under that certain
Multi-Year Revolving Credit Agreement dated as of August 25, 2004, by and among the Borrower,
Wachovia Bank, National Association, individually, as Administrative Agent, Issuing Bank and
Swingline Lender, Citibank, N.A. and JPMorgan Chase Bank, individually and as Co-Syndication
Agents, Mizuho Corporate Bank, Ltd., SunTrust Bank and The Bank of Nova Scotia, individually and as
Co-Documentation Agents, and the other financial institutions parties thereto (such Credit
Agreement, together with all amendments or supplements thereto, being the “Credit
Agreement”), and shall be governed by the Credit Agreement. Capitalized terms used in this
note and not defined in this note, but which are defined in the Credit Agreement, have the
respective meanings herein as are assigned to them in the Credit Agreement.

     The Swingline Lender is hereby authorized by the Borrower to endorse on Schedule A (or a
continuation thereof) attached to this note, the amount and date of each payment or prepayment of
principal of each such Swingline Loan received by the Swingline Lender, provided that any failure
by the Swingline Lender to make any such endorsement shall not affect the obligations of the
Borrower under the Credit Agreement or under this note in respect of such Swingline Loans.

     This note may be held by the Swingline Lender for the account of its applicable lending office
and, except as otherwise provided in the Credit Agreement, may be transferred from one lending
office of the Swingline Lender to another lending office of the Swingline Lender from time to time
as the Swingline Lender may determine.

     Except only for any notices which are specifically required by the Credit Agreement, the
Borrower and any and all co-makers, endorsers, guarantors and sureties severally waive

 

 

notice (including but not limited to notice of intent to accelerate and notice of acceleration,
notice of protest and notice of dishonor), demand, presentment for payment, protest, diligence in
collecting and the filing of suit for the purpose of fixing liability, and consent that the time of
payment hereof may be extended and re-extended from time to time without notice to any of them.
Each such person agrees that its liability on or with respect to this note shall not be affected by
any release of or change in any guaranty or security at any time existing or by any failure to
perfect or maintain perfection of any lien against or security interest in any such security or the
partial or complete unenforceability of any guaranty or other surety obligation, in each case in
whole or in part, with or without notice and before or after maturity.

     The Credit Agreement provides for the acceleration of the maturity of this note upon the
occurrence of certain events and for prepayment of Swingline Loans upon the terms and conditions
specified therein. Reference is made to the Credit Agreement for all other pertinent purposes.

     This note is issued pursuant to and is entitled to the benefits of the Credit Agreement.

     It is hereby understood and agreed that Enterprise Products OLPGP, Inc., the general partner
of the Borrower, shall have no personal liability, as general partner or otherwise, for the payment
of any amount owing or to be owing hereunder.

     This note shall be construed in accordance with and be governed by the law of the State of
New York and the United States of America from time to time in effect.

	 	 	 	 	 	 	 
	 	 	ENTERPRISE PRODUCTS OPERATING L.P.	 	 
	 
	 

	 	By:
	 	Enterprise Products OLPGP, Inc.,	 	 
	 

	 	 	 	General Partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 
	 

	 	 	 	Title:	 	 

 

 

SCHEDULE A

TO

SWINGLINE LOAN NOTE

This note evidences the Swingline Loans owed to the Swingline Lender under the Credit Agreement, in
the principal amount set forth below, subject to the payments of principal set forth below:

SCHEDULE

OF

SWINGLINE LOANS AND PAYMENTS OF PRINCIPAL AND INTEREST

	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Principal	 	 	Amount of	 	 	 	 	 	 	Balance	 	 	 	 
	 	 	Amount of	 	 	Principal	 	 	 	 	 	 	of	 	 	Notation	 
	 	 	Swingline	 	 	Paid or	 	 	Interest	 	 	Swingline	 	 	Made	 
	Date	 	Loan	 	 	Prepaid	 	 	Paid	 	 	Loans	 	 	byexv4w6

 

EXHIBIT 4.6

 

PURCHASE AGREEMENT

between

CERRITO GATHERING COMPANY, LTD.

CERRITO GAS MARKETING, LTD.

ENCINAL GATHERING, LTD.

as Sellers

LEWIS ENERGY GROUP, L.P.

as Guarantor

and

ENTERPRISE PRODUCTS PARTNERS L.P.

as Buyer

July 12, 2006

 

 

 

Table of Contents

	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	Page
	§1.	 	Definitions	 	 	1	 
	 
	 	 	 	 	 	 	 	 
	§2.	 	Purchase and Sale of Assets	 	 	15	 
	 

	 	(a)
	 	Assets
	 	 	15	 
	 

	 	(b)
	 	Excluded Assets
	 	 	17	 
	 

	 	(c)
	 	Liabilities
	 	 	17	 
	 

	 	(d)
	 	Estimated Purchase Price
	 	 	18	 
	 

	 	(e)
	 	Preliminary Settlement Statement
	 	 	18	 
	 

	 	(f)
	 	Post-Closing Adjustment Procedure
	 	 	18	 
	 

	 	(g)
	 	Final Purchase Price Allocation
	 	 	19	 
	 

	 	(h)
	 	Sellers’ Liability for Taxes
	 	 	19	 
	 

	 	(i)
	 	Prorations
	 	 	19	 
	 

	 	(j)
	 	Closing
	 	 	19	 
	 

	 	(k)
	 	Closing Obligations
	 	 	20	 
	 

	 	(l)
	 	Material Consents
	 	 	23	 
	 
	 	 	 	 	 	 	 	 
	§3.	 	Representations and Warranties of Buyer	 	 	24	 
	 

	 	(a)
	 	Organization
	 	 	24	 
	 

	 	(b)
	 	Authorization of Transaction
	 	 	24	 
	 

	 	(c)
	 	Non-contravention
	 	 	25	 
	 

	 	(d)
	 	Brokers’ Fees
	 	 	25	 
	 

	 	(e)
	 	Available Funds and Enterprise Units
	 	 	25	 
	 

	 	(f)
	 	Qualified for Gathering System Permits
	 	 	25	 
	 

	 	(g)
	 	Independent Investigation
	 	 	25	 
	 
	 	 	 	 	 	 	 	 
	§4.	 	Representations and Warranties of Sellers	 	 	26	 
	 

	 	(a)
	 	Organization, Qualification, and Power
	 	 	26	 
	 

	 	(b)
	 	Authorization of Transaction
	 	 	26	 
	 

	 	(c)
	 	Non-contravention
	 	 	26	 
	 

	 	(d)
	 	Brokers’ Fees
	 	 	26	 
	 

	 	(e)
	 	Assets
	 	 	27	 
	 

	 	(f)
	 	Subsequent Events
	 	 	27	 
	 

	 	(g)
	 	Legal Compliance
	 	 	28	 
	 

	 	(h)
	 	Real Property
	 	 	28	 
	 

	 	(i)
	 	Material GS Contracts
	 	 	29	 
	 

	 	(j)
	 	Litigation
	 	 	30	 
	 

	 	(k)
	 	Labor and Employment
	 	 	30	 
	 

	 	(l)
	 	Gathering System Permits
	 	 	30	 
	 

	 	(m)
	 	Environmental Matters
	 	 	31	 
	 

	 	(n)
	 	Insurance
	 	 	32	 
	 

	 	(o)
	 	Governmental Regulation
	 	 	32	 
	 

	 	(p)
	 	Disclosure and Due Diligence
	 	 	32	 
	 

	 	(q)
	 	Taxes
	 	 	32	 
	 

	 	(r)
	 	No Other Agreements to Sell Assets
	 	 	33	 
	 

	 	(s)
	 	Disclaimer of Other Representations and Warranties
	 	 	33	 

-i-

 

	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	Page
	 

	 	(t)
	 	Sellers’ Private Placement Representations
	 	 	35	 
	 

	 	(u)
	 	Relationships with Related Persons
	 	 	35	 
	 

	 	(v)
	 	Conveyance Documents
	 	 	35	 
	 

	 	(w)
	 	No Undisclosed Material Liabilities
	 	 	36	 
	 

	 	(x)
	 	Other Information
	 	 	36	 
	 

	 	(y)
	 	Indebtedness
	 	 	36	 
	 
	 	 	 	 	 	 	 	 
	§5.	 	Labor and Employment; Employee Benefits	 	 	36	 
	 

	 	(a)
	 	Affected Employees
	 	 	36	 
	 

	 	(b)
	 	Employment of Affected Employees by Buyer
	 	 	36	 
	 

	 	(c)
	 	Salaries and Benefits
	 	 	37	 
	 

	 	(d)
	 	Sellers’ Group Health Plans
	 	 	38	 
	 

	 	(e)
	 	Sellers’ Retirement and Savings Plans
	 	 	39	 
	 

	 	(f)
	 	General Employee Provisions
	 	 	39	 
	 
	 	 	 	 	 	 	 	 
	§6.	 	Post-Closing Covenants	 	 	40	 
	 

	 	(a)
	 	General
	 	 	40	 
	 

	 	(b)
	 	Payment of Obligations Under Lehman Agreement
	 	 	40	 
	 

	 	(c)
	 	Preferential Right to Purchase
	 	 	40	 
	 

	 	(d)
	 	Transition Services
	 	 	40	 
	 

	 	(e)
	 	Post-Closing Settlement of Income and Expenses Received or Paid
	 	 	41	 
	 

	 	(f)
	 	Shelf Registration Rights
	 	 	41	 
	 

	 	(g)
	 	Lock-up of Enterprise Units
	 	 	45	 
	 

	 	(h)
	 	Financial Information
	 	 	45	 
	 

	 	(i)
	 	Customer and Other Business Relationships
	 	 	46	 
	 

	 	(j)
	 	Certain Actions by Sellers
	 	 	46	 
	 

	 	(k)
	 	VOC Site Assessment
	 	 	46	 
	 

	 	(l)
	 	Transfer of Interim Excluded Assets
	 	 	46	 
	 

	 	(m)
	 	Radio Tower and Shared Data Agreement
	 	 	47	 
	 

	 	(n)
	 	Joint Use of Easements and Surface Sites
	 	 	47	 
	 

	 	(o)
	 	Joint Venture Agreement
	 	 	47	 
	 
	 	 	 	 	 	 	 	 
	§7.	 	Remedies for Breaches of This Agreement	 	 	47	 
	 

	 	(a)
	 	Indemnification Provisions for Buyer’s Benefit
	 	 	47	 
	 

	 	(b)
	 	Indemnification Provisions for Sellers’ Benefit
	 	 	47	 
	 

	 	(c)
	 	Liabilities Non-Recourse to Buyer’s General Partner
	 	 	48	 
	 

	 	(d)
	 	Claims Period
	 	 	48	 
	 

	 	(e)
	 	Buyer Basket; Indemnification
	 	 	48	 
	 

	 	(f)
	 	Determination of Adverse Consequences
	 	 	49	 
	 

	 	(g)
	 	Exclusive Remedy
	 	 	49	 
	 

	 	(h)
	 	Investigations
	 	 	49	 
	 

	 	(i)
	 	Limitation on Damages
	 	 	49	 
	 
	 	 	 	 	 	 	 	 
	§8.	 	Miscellaneous	 	 	49	 
	 

	 	(a)
	 	No Third-Person Beneficiaries
	 	 	49	 
	 

	 	(b)
	 	Disclosure Schedule
	 	 	50	 
	 

	 	(c)
	 	Entire Agreement
	 	 	50	 
	 

	 	(d)
	 	Succession and Assignment
	 	 	50	 
	 

	 	(e)
	 	Counterparts
	 	 	50	 

-ii-

 

	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	Page
	 

	 	(f)
	 	Headings
	 	 	50	 
	 

	 	(g)
	 	Notices
	 	 	50	 
	 

	 	(h)
	 	Governing Law
	 	 	52	 
	 

	 	(i)
	 	Arbitration
	 	 	52	 
	 

	 	(j)
	 	Amendments and Waivers
	 	 	52	 
	 

	 	(k)
	 	Seller Representative
	 	 	52	 
	 

	 	(l)
	 	Severability
	 	 	53	 
	 

	 	(m)
	 	Expenses
	 	 	53	 
	 

	 	(n)
	 	Construction
	 	 	53	 
	 

	 	(o)
	 	Incorporation of Exhibits and Schedules
	 	 	53	 
	 

	 	(p)
	 	Bold and/or Capitalized Letters
	 	 	54	 
	 

	 	(q)
	 	1031 Treatment
	 	 	54	 

-iii-

 

Exhibits and Disclosure Schedule

Exhibits

	 	 	 
	Exhibit A

	 	Form of Deep Rich Gathering Agreement
	Exhibit B

	 	Form of Deep Rich Processing Agreement
	Exhibit C

	 	Form of Enterprise Texas Pipeline PSA/Lease Termination Letter
	Exhibit D

	 	Form of Lean Gas Gathering Agreement
	Exhibit E

	 	Form of LPP Zero Rate Gathering Service Agreement
	Exhibit F

	 	Form of Mexico Gathering Agreement
	Exhibit G

	 	Form of Mexico Processing Agreement
	Exhibit H

	 	Form of Non-Circumvention Agreement
	Exhibit I

	 	Form of Parent Guaranty
	Exhibit J

	 	Form of Shallow Rich Gathering Agreement
	Exhibit K

	 	Form of Shallow Rich Processing Agreement
	Exhibit L

	 	Form of Bill of Sale
	Exhibit M

	 	Form of Special Warranty Deed
	Exhibit N

	 	Form of Gathering Lines Assignment
	Exhibit O

	 	Form of Canales 12” Gathering Lines Assignment
	Exhibit P

	 	Form of Gathering System Permits Assignment
	Exhibit Q

	 	Form of Gathering System Contracts Assignment
	Exhibit R

	 	Form of Easements Assignment

Disclosure Schedule

	 	 	 
	§1(a)

	 	Facilities Holding Condensate Inventory
	§1(b)

	 	Indebtedness
	§1(c)

	 	Interim Excluded Assets
	§1(d)

	 	Knowledge of Buyer
	§1(e)

	 	Knowledge of Each Seller
	§1(f)

	 	Material Consents
	§2(a)(i)

	 	Plant Facilities
	§2(a)(ii)

	 	Gathering System Contracts
	§2(a)(iii)

	 	Gathering System Permits
	§2(a)(iv)

	 	Personal Property
	§2(a)(v)

	 	Gathering Lines
	§2(a)(vi)

	 	Equipment
	§2(a)(x)

	 	Owned Real Property
	§2(a)(xi)

	 	Easements
	§2(b)(vi)

	 	Excluded Assets
	§2(d)

	 	Estimated Purchase Price Allocation Between Cash and Enterprise Units
	§2(e)

	 	Preliminary Settlement Statement
	§4(c)

	 	Governmental Authority
	§4(e)(i)

	 	Asset Title Exceptions
	§4(e)(ii)

	 	Assignable Assets Subject to Consent
	§4(f)

	 	Subsequent Events

-iv-

 

	 	 	 
	§4(f)(viii)

	 	Terminated Principal Customers or Suppliers
	§4(g)

	 	Legal Compliance
	§4(h)

	 	Owned Real Property
	§4(h)(i)

	 	Title to Real Property
	§4(i)

	 	Material GS Contracts
	§4(j)

	 	Litigation
	§4(l)

	 	Gathering System Permits
	§4(m)

	 	Environmental Matters
	§4(n)

	 	Insurance Policies
	§4(u)

	 	Relationships with Related Persons
	§5(a)

	 	Affected Employees
	§5(b)(i)

	 	Identified Employees
	§5(c)(iv)

	 	Employee Plans
	§6(j)

	 	Certain Actions by Sellers
	§6(k)

	 	VOC Emissions Sites
	§6(m)

	 	Radio Tower Facilities
	§6(n)

	 	Joint Use of Easements and Surface Sites

-v-

 

PURCHASE AGREEMENT

     This Purchase Agreement (this “Agreement”) is executed this 12th day of July, 2006
(the “Closing Date”), to be effective as of 12:01 a.m. July 1, 2006 (the “Effective
Time”), by and between Cerrito Gathering Company, Ltd., a Texas limited partnership
(“Cerrito”), Cerrito Gas Marketing, Ltd., a Texas limited partnership and a wholly-owned
subsidiary of Cerrito (“CGM”), and Encinal Gathering, Ltd., a Texas limited partnership and
a wholly-owned subsidiary of Cerrito (“EGL” and, together with Cerrito and CGM,
“Sellers”), and Enterprise Products Partners L.P., a Delaware limited partnership
(“Buyer”). Buyer, any Buyer Designee (as defined below), and each Seller are sometimes
individually referred to as a “Party” and collectively as the “Parties.” Lewis Energy Group, L.P.,
a Delaware limited partnership (“LEG”), is executing this Agreement as guarantor of the
obligations of Sellers hereunder, and for the limited purposes of making certain representations
and disclaimers hereunder.

RECITALS

     WHEREAS, Sellers own an approximate 311 mile natural gas gathering system and related
facilities and assets located in Webb, LaSalle and Dimmit Counties, Texas, generally known as the
Cerrito Rich Gas Gathering System, which includes those assets described in §§2(a)(i), (iv), (v),
(vi), (vii), (x) and (xi) of the Disclosure Schedule (but excluding the Excluded Assets, the
“Gathering System”); and

     WHEREAS, Buyer desires to acquire from Sellers, and Sellers desire to sell to Buyer, on a
going concern basis, substantially all the assets and properties which are owned by Sellers and
relate to the Gathering System; and

     WHEREAS, Sellers and Buyer desire to enter into certain other related transactions as provided
in this Agreement.

     Now, therefore, for and in consideration of the premises and the mutual promises made in this
Agreement, and in consideration of the representations, warranties, and covenants contained in this
Agreement, the Parties agree as follows:

§1. Definitions

     “Accredited Investor” has the meaning set forth in Rule 501(a) of Regulation D
promulgated under the Securities Act.

     “Adverse Consequences” means all Proceedings, charges, complaints, claims, demands,
injunctions, judgments, orders, decrees, rulings, damages, remedial obligations, dues, penalties,
fines, costs, reasonable amounts paid in settlement, Liabilities, Taxes, Liens, losses, expenses,
and fees, including court costs and reasonable attorneys’ fees and expenses.

     “Affected Employees” means all employees and independent contractors whose duties
involve or directly relate to the operation of the Assets.

     “Affiliate” has the meaning set forth in Rule l2b-2 of the regulations promulgated
under the Securities Exchange Act of 1934.

 

 

     “Applicable Rate” as to any given period means the rate for deposits of dollars for a
period of 30 days at or about 11:00 a.m. (London time) on the second London banking day before the
first day of the period for which such rate is required as displayed on Telerate page 3750 (British
Bankers’ Association Interest Settlement Rates) (or such other page as may replace page 3750 on
such system or on any other system of the information vendor for the time being designated by the
British Bankers’ Association to calculate the British Bankers’ Association Interest Settlement Rate
(as defined in the British Bankers’ Association’s Recommended Terms and Conditions, dated August,
1985)); provided that if on such date no such rate is so displayed, LIBOR for such period shall be
the arithmetic mean (rounded upward if necessary to four decimal places) of the rates quoted by
Citibank N.A. as its offered rate for deposits of dollars in an amount approximately equal to the
amount in relation to which LIBOR is to be determined for a 30-day period to prime banks in the
London Interbank Market at or about 11:00 a.m. (London time) on the second banking day before the
first day of such period.

     “Assets” has the meaning set forth in §2(a).

     “Assumed Environmental Liabilities” means, subject to the last sentence of this
paragraph, Liabilities for soil contamination, water contamination, and all other types of Releases
or environmental damage or contamination in, on, around, or under the Assets or arising from the
Assets including environmental contamination that exists as of the Closing Date or that is caused
by or arises from Releases prior to, on, or after the Closing Date, regardless of whether such
environmental contamination: (1) was known or unknown at the time of Closing Date; (2) was caused
by the Seller Indemnified Parties or Third Persons’ pre-Closing negligence, actions, omissions,
strict liability or fault; (3) gives rise to strict liability under any Environmental Laws or any
applicable Laws; or (4) arises from the operation, design, physical condition, or
maintenance-status of the Assets before on, or after the Closing Date. Notwithstanding the
preceding, “Assumed Environmental Liabilities” do not include (a) any Liabilities that
arise out of or relate to a Breach by any Seller or LEG of this Agreement or of any Transaction
Document, (b) administrative, civil and/or criminal fines or penalties assessed by any Governmental
Authority to the extent attributable to or assessed with respect to the period prior to Closing,
Seller’s operation of the Assets, or the delay in obtaining Permits or approvals of Governmental
Authorities required as of the Closing Date, (c) any Liabilities arising out of Proceedings
involving property damage or personal injury that occurred prior to Closing; and/or (d) any
Liabilities arising out of or relating to the Las Tiendas Remediation.

     “Assumed Liabilities” has the meaning set forth in §2(c)(i).

     “Base Purchase Price” means Three Hundred Twenty-Five Million Dollars ($325,000,000).

     “Basket” has the meaning set forth in §7(e).

     “Best Efforts” means the efforts, time, and costs that a prudent Person desirous of
achieving a result would use, expend, or incur in similar circumstances to ensure that such result
is achieved as expeditiously as possible.

-2-

 

     “Big Reef Treating Facility” means Cerrito’s gas treating facility located
approximately 21 miles west/southwest of Encinal, Texas.

     “Bill of Sale” has the meaning set forth in §2(k)(i)(A).

     “Breach” means any breach of, or any inaccuracy in, any representation or warranty or
any breach of, or failure to perform or comply with, any covenant or obligation, in or of this
Agreement or any other Contracts, or any event which with the passing of time or the giving of
notice, or both, would constitute such a breach, inaccuracy or failure.

     “Btu” or “British Thermal Unit” means the amount of heat required to raise the
temperature of one pound of water from 58o Fahrenheit to 59o Fahrenheit under standardized
conditions. It will be assumed that the gas is saturated with water vapor at 60o degrees
Fahrenheit under a pressure of fourteen and seventy-three hundredths (14.73) psia, under standard
gravitational force (980.665 centimeters per second squared).

     “Business Day” means any day that is not a Saturday, a Sunday, or other day on which
national banks are closed in the City of Houston, Texas or in the City of New York, New York.

     “Buyer” has the meaning set forth in the preface.

     “Buyer Adverse Consequences” means the Adverse Consequences of the Buyer Indemnified
Parties as to which the Buyer Indemnified Parties are entitled to indemnification under §7(a).

     “Buyer Designee” means any Affiliate of Buyer identified to Sellers.

     “Buyer Indemnified Parties” means Buyer and its Related Persons, each of their
Representatives and each of the heirs, executors, successors and assigns of any of the preceding.

     “Canales 12” Gathering Line Assignment” has the meaning set forth in §2(k)(i)(D).

     “Cerrito” has the meaning set forth in the preface.

     “CGM” has the meaning set forth in the preface.

     “Claim for Indemnification” means a written notice by an Indemnified Party to the
Indemnifying Party asserting a claim under §7 delivered in accordance with §8(g); provided,
however, that such notice shall be sufficient if it provides a general description of the Adverse
Consequences that the Indemnified Party may suffer, with an estimate of the extent of the dollar
amount of Adverse Consequences.

     “Claims Period” means the period during which an Indemnified Party may assert a Claim
for Indemnification.

     “Closing” has the meaning set forth in §2(j).

     “Closing Date” has the meaning set forth in the preface.

-3-

 

     “COBRA” means Consolidated Omnibus Budget Reconciliation Act, as amended.

     “Code” means the Internal Revenue Code of 1986, as amended.

     “Commission” has the meaning set forth in §6(f)(i).

     “Competing Business” has the meaning set forth in §4(u).

     “Condensate Inventory” means product of the volumes of condensate that Sellers own as
of the Effective Time held in the facilities described in §1(a) of the Disclosure Schedule and
verified by Representatives of Seller and Buyer together, multiplied by the posted price for Flint
Hills Resources South Texas Light Sweet type crude oil, deemed 40 degrees API less Taxes, if any,
plus $1.70 per barrel.

     “Confidentiality Agreement” means the terms of that certain confidentiality agreement
between LEG and Enterprise Products Operating L.P. dated March 21, 2006.

     “Consent” means any unqualified approval, authorization, consent, ratification or
waiver.

     “Contemplated Transactions” means all of the transactions contemplated in this
Agreement.

     “Contract” means any agreement, contract, lease, consensual obligation, promise or
undertaking (whether written or oral and whether express or implied).

     “Credit Facility” means the Fifth Amended and Restated Credit Agreement dated November
30, 2005 by and between Cerrito Gas Marketing, Ltd., Cerrito Gas Processing, LLC, Cerrito Gathering
Company, Ltd., and Encinal Gathering, Ltd., as borrowers, the financial institutions party thereto
as lenders, and Guaranty Bank as administrative agent and as issuing lender.

     “Deep Rich Gathering Agreement” means the gas gathering agreement, in the form of
Exhibit A, for the gathering of gas produced from all depths deeper than one hundred (100)
feet below the base of the Olmos Formation; provided that production from the Edwards Formation (as
well as any other formations which produce gas containing either: (1) H2S in
concentrations greater than one-quarter (1/4) grain; or (2) CO2 in concentrations
greater than three percent (3%)) is excluded from this specific dedication.

     “Deep Rich Processing Agreement” means the gas processing agreement, in the form of
Exhibit B, for the processing of gas produced from all depths deeper than one hundred (100)
feet below the base of the Olmos Formation; provided that production from the Edwards Formation (as
well as any other formations which produce gas containing either: (1) H2S in
concentrations greater than one-quarter (1/4) grain; or (2) CO2 in concentrations
greater than three percent (3%)) is excluded from this specific dedication.

     “Direct Costs” means the costs or expenses actually incurred by Sellers and their
Affiliates to employees and Third Persons directly attributable to Transition Services, but

-4-

 

excluding any overhead of Sellers and any overhead and/or profit components that might be
charged to Sellers by their Affiliates.

     “Disclosure Schedule” has the meaning set forth in §4.

     “Dispute” has the meaning set forth in §8(i).

     “Easements” has the meaning set forth in §2(a)(xi).

     “Easements Assignment” has the meaning set forth in §2(k)(i)(G).

     “Edwards Formation” means the stratigraphic interval between the measured depths of
9,575 feet and 9,925 feet as seen in the LPP Booth WV Jr. “H” 5 U RRC #42-479-38866 located in
Webb, Texas.

     “Effective Time” has the meaning set forth in the preface.

     “EGL” has the meaning set forth in the preface.

     “EH” means Enterprise Hydrocarbons L.P., a Delaware limited partnership.

     “Employee Plans” means, as provided by each Seller to its employees, all “employee
benefit plans” as defined by Section 3(3) of ERISA, all specified fringe benefit plans as defined
in Section 6039D of the Code, and all other bonus, incentive compensation, deferred compensation,
profit-sharing, stock-option, stock appreciation-right, stock bonus, stock purchase,
employee-stock-ownership, savings, severance, change-in-control, supplemental-unemployment, layoff,
salary continuation, retirement, pension, health, life-insurance, disability, accident,
group-insurance, vacation, holiday, sick-leave, fringe benefit or welfare plan, and any other
employee compensation or benefit plan, Contract, policy, practice, commitment or understanding
(whether qualified or nonqualified, currently effective or terminated, written or unwritten) and
any trust, escrow or other Contract related thereto that: (1) is maintained or contributed to by
such Seller or any other corporation or trade or business controlled by, controlling or under
common control with such Seller (within the meaning of Section 414 of the Code or Section
4001(a)(14) or 4001(b) of ERISA) (“ERISA Affiliate”) or has been maintained or contributed
to in the last six years by such Seller or any ERISA Affiliate, or with respect to which such
Seller or any ERISA Affiliate has or may have any Liability; and (2) provides benefits, or
describes policies or procedures applicable to any current or former director, officer, employee or
service provider of Seller or any ERISA Affiliate, or the dependents of any thereof, regardless of
how (or whether) Liabilities for the provision of benefits are accrued or assets are acquired or
dedicated with respect to the funding thereof. Employee Plans include: (a) a “Defined Benefit
Plan” (as defined in Section 414(l) of the Code); (b) a plan intended to meet the requirements of
Section 401(a) of the Code; (c) a “Multiemployer Plan” (as defined in Section 3(37) of ERISA); or
(d) a plan subject to Title IV of ERISA, other than a Multiemployer Plan.

     “Enterprise Products GP, LLC” is a Delaware limited liability company and the general
partner of Buyer.

-5-

 

     “Enterprise Texas Pipeline Lease” means the Lease Agreement between ETPL and EGL dated
December 1, 2002.

     “Enterprise Texas Pipeline PSA” means the Purchase and Sale Agreement between ETPL and
EGL dated December 1, 2005.

     “Enterprise Texas Pipeline PSA/Lease Termination Letter” means the letter agreement,
to be dated the Closing Date, between ETPL and EGL terminating the Enterprise Texas Pipeline PSA
and the Enterprise Texas Pipeline Lease in the form of Exhibit C.

     “Enterprise Texas Pipeline PSA/Lease Termination Payment” means Two Hundred
Seventy-Five Thousand Dollars ($275,000), which is the amount that EGL owes ETPL in consideration
for termination of the Enterprise Texas Pipeline PSA and the Enterprise Texas Pipeline Lease as
provided in the Enterprise Texas Pipeline PSA/Lease Termination Letter.

     “Enterprise Units” means Common Units of Buyer as such term is defined in the Fifth
Amended and Restated Agreement of Limited Partnership of Enterprise Product Partners L.P., dated
August 8, 2005.

     “Environmental Law” means any and all Laws pertaining to the protection of the
environment or natural resources or to Hazardous Materials in any and all jurisdictions in which
any Seller owns property or conducts business or in which the Assets are located, including the
Clean Air Act, the Comprehensive Environmental Response, Compensation, and Liability Act of 1980
(“CERCLA”), the Federal Water Pollution Control Act, the Occupational Safety and Health Act
of 1970 (to the extent relating to environmental matters), the Resource Conservation and Recovery
Act of 1976, the Safe Drinking Water Act, the Toxic Substances Control Act, the Hazardous & Solid
Waste Amendments Act of 1984, the Superfund Amendments and Reauthorization Act of 1986, the
Hazardous Materials Transportation Act, the Oil Pollution Act of 1990, any state or local Laws
implementing or substantially equivalent to the foregoing federal Laws, and any state or local Laws
pertaining to the handling of oil and gas exploration, production, gathering, and processing wastes
or the use, maintenance, and closure of pits and impoundments, all as amended through the Closing
Date.

     “Equipment” has the meaning set forth in §2(a)(vi).

     “ERISA” means the Employee Retirement Income Security Act of 1974, as amended.

     “ESTG” means Enterprise South Texas Gathering L.P., a Delaware limited partnership.

     “Estimated Purchase Price” has the meaning set forth in §2(d).

     “ETPL” means Enterprise Texas Pipeline L.P., a Delaware limited partnership.

     “Excluded Assets” has the meaning set forth in §2(b).

     “Excluded Liabilities” means the Liabilities set forth in §2(c)(ii).

     “Final Purchase Price” has the meaning set forth in §2(f).

-6-

 

     “Final Settlement Date” has the meaning set forth in §2(f).

     “GAAP” means generally accepted accounting principles in the United States.

     “Gathering Lines” has the meaning set forth in §2(a)(v).

     “Gathering Lines Assignment” has the meaning set forth in §2(k)(i)(C).

     “Gathering System” has the meaning set forth in the recitals.

     “Gathering System Contracts” has the meaning set forth in §2(a)(ii).

     “Gathering System Contracts Assignment” has the meaning set forth in §2(k)(i)(F).

     “Gathering System Permits” has the meaning set forth in §2(a)(iii).

     “Gathering System Permits Assignment” has the meaning set forth in §2(k)(i)(E).

     “General Exceptions to Enforceability” means limitations on or exceptions to the
enforceability of a Contract or instrument by: (1) bankruptcy, insolvency, fraudulent conveyance,
reorganization, moratorium, or other similar Laws affecting creditors’ rights; or (2) general
principles of equity relating to the availability of equitable remedies (regardless of whether such
Contract or instrument is sought to be enforced in a Proceeding at Law or in equity).

     “Governing Documents” means, with respect to any particular entity: (1) if a
corporation, the articles or certificate of incorporation and the bylaws; (2) if a general
partnership, the partnership agreement and any statement of partnership; (3) if a limited
partnership, the limited partnership agreement and the certificate of limited partnership; (4) if
a limited liability company, the articles of organization and operating agreement; (5) if another
type of Person, any other charter or similar document adopted or filed in connection with the
creation, formation or organization of the Person; (6) all equityholders’ agreements, voting
agreements, voting trust agreements, joint venture agreements, registration rights agreements or
other agreements or documents relating to the organization, management or operation of any Person
or relating to the rights, duties and obligations of the equityholders of any Person; and (7) any
amendment or supplement to any of the foregoing.

     “Governmental Authority” means: (1) the United States of America or any state or local
political subdivision thereof within the United States of America; (2) any court or any
governmental or administrative department, commission, board, bureau, or agency of the United
States of America or of any state or local political subdivision thereof within the United States
of America; and (3) any national, state, regional, or local government, regulatory or
administrative authority, any subdivision, agency, commission in or authority thereof, including
any quasi-governmental organization, any court, tribunal or arbitral body acting within its legal
authority.

     “Hazardous Materials” means: (1) any chemicals, materials or substances listed as or
defined or included in the definition of “hazardous substance,” “hazardous material,” “toxic
substance,” “solid waste,” “pollutant,” “contaminant,” or words of similar import, under any
applicable Environmental Law; and (2) radioactive materials, asbestos, mercury, lead based

-7-

 

paints, polychlorinated biphenyls, and any waste or spilled petroleum (including, crude oil or
any faction thereof), petroleum products, natural gas liquids, or natural gas condensate.

     “Houston Ship Channel Index” means the index price listed in the first regular edition
of Platts Inside FERC Gas Market Report published during the Month of delivery and identified in
the table entitled “MARKET CENTER SPOT-GAS PRICES” under the heading “East Texas” as the “Houston
Ship Channel” price under the column entitled “Index.”

     “HPLC” means Houston Pipe Line Company LP.

     “HPLC Gas Purchase Agreement” means that certain Gas Purchase Agreement between HPLC
and CGM dated effective August 1, 2005, as amended by the First Amendment to Gas Purchase Agreement
dated October 1, 2005.

     “HSR Act” means the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended.

     “Identified Employees” has the meaning set forth in §5(b)(i).

     “Imbalance Payable” shall mean the value of any volumetric imbalance owed by Sellers
to any Affiliate of Buyer as of the Effective Time based upon 99% of the Houston Ship Channel Index
as of the Effective Time less $.025/MMBtu.

     “Imbalance Receivable” shall mean the value of any volumetric imbalance owed by any
Affiliate of Buyer to Sellers as of the Effective Time based upon 99% of the Houston Ship Channel
Index as of the Effective Time less $.025/MMBtu.

     “Imbalances” means all natural gas imbalances between any Seller and a Third Person
relating to or arising out of the operation of the Assets that exist at the Effective Time.

     “Indebtedness” means any financing encumbering any Asset that is a Liability of any
Seller or any Affiliate of Seller, which has been paid off or otherwise released as of Closing,
including the Credit Facility and those listed on §1(b) of the Disclosure Schedule.

     “Indefinite Surviving Representations” means the following representations and
warranties: §4(a) (Organization, Qualification, and Power), §4(b) (Authorization of Transaction),
§4(c) (Non-contravention), §4(d) (Brokers’ Fees), §4(e)(i) (Assets), §4(h)(i) (Title to Real
Property), §4(r) (No Other Agreements to Sell Assets), §4(t) (Sellers’ Private Placement
Representations), §4(u) (Relationships with Related Persons), and §4(y) (Indebtedness).

     “Indemnification Cap” has the meaning set forth in §7(e).

     “Indemnified Party” means a Buyer Indemnified Party or a Seller Indemnified Party.

     “Indemnifying Party” means the Party providing indemnification to the Indemnified
Party.

     “Independent Accounting Firm” has the meaning set forth in §2(f).

-8-

 

     “Interim Excluded Assets” means the assets and properties described in §1(c) of the
Disclosure Schedule.

     “Knowledge of Buyer” means actual knowledge after reasonable inquiry, of each
individual listed in §1(d) of the Disclosure Schedule.

     “Knowledge of Seller or Sellers” means actual knowledge after reasonable inquiry, of
each individual listed in §1(e) of the Disclosure Schedule.

     “Lawful Assign” has the meaning set forth in §6(g).

     “Las Tiendas Remediation” means the remediation activities of Sellers at the Las
Tiendas site, a 200’ x 400’ fenced site located approximately 21 miles southwest of Encinal in Webb
County, Texas, located at approximate latitude N27° 53’51” and longitude W99° 39’15”, pursuant to a
site remediation plan and agreement between Cerrito, HPLC and the Railroad Commission of Texas.

     “Laws” means all applicable statutes, laws (including common law), regulations, rules,
rulings, ordinances, orders, restrictions, requirements, writs, judgments, injunctions, decrees and
other official acts of or by any Governmental Authority or arbitral body.

     “Lean Gas Gathering Agreement” means the Contract for the gathering and transportation
of lean gas from the Big Reef Treating Facility, in the form of Exhibit D.

     “LEG” has the meaning set forth in the preface.

     “Lehman” means Lehman Brothers, Inc.

     “Liability” means any liability or obligation (whether known or unknown, whether
asserted or unasserted, whether absolute or contingent, whether accrued or unaccrued, whether
liquidated or unliquidated, and whether due or to become due), including those arising under any
Law and those arising under any Contract or undertaking, and whether or not the same is required to
be accrued on the financial statements of any Person.

     “Lien” means any charge, claim, community or other marital property interest,
condition, equitable interest, lien, option, pledge, security interest, mortgage, right of way,
easement, encroachment, servitude, right of first option, right of first refusal or similar
restriction, including any restriction on use, voting (in the case of any security or equity
interest), transfer, receipt of income or exercise of any other attribute of ownership.

     “Lock-Up Period” has the meaning set forth in §6(g).

     “LPP” means Lewis Petro Properties, Inc.

     “LPP Zero Rate Gathering Service Letter Agreement” means the letter agreement, in the
form of Exhibit E, under which LPP will provide, subject to certain conditions, zero rate
gathering service to EH for Third Persons’ gas.

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     “Material Adverse Effect” or “Material Adverse Change” means any effect,
event, combination of events, circumstance, occurrence, or change that, individually or in the
aggregate, is or could reasonably be expected to be materially adverse to the Gathering System or
the Assets, taken as a whole, or to the ability of any Party to consummate timely the Contemplated
Transactions; provided that none of the following shall be deemed to constitute, and none of the
following shall be taken into account in determining whether there has been, a Material Adverse
Effect or Material Adverse Change: any adverse change, event, development, or effect arising from
or relating to: (1) general business or economic conditions; (2) national or international
political or social conditions, including the engagement-or continuation by the United States in
hostilities, whether or not pursuant to the declaration of a national emergency or war, or the
occurrence of any military or terrorist attack upon the United States, or any of its territories,
possessions, or diplomatic or consular offices or upon any military installation, equipment or
personnel of the United States; or (3) financial, banking, or securities markets (including any
disruption thereof and any decline in the price of any security, commodity or market index);
provided that none of the changes, events, developments or effects described in clauses (1) through
(3) specifically relate to or have the effect of specifically relating to or having a materially
disproportionate effect on the Gathering System or the Assets relative to most other industry
participants in the midstream natural gas industry. For purposes hereof, any reference to
“Material Adverse Effect” in any representation or warranty contained in §4 of this Agreement shall
be deemed to include any event, combination of events, circumstance or occurrence or change that,
individually or in the aggregate, has or could reasonably be expected to result in Adverse
Consequences in excess of Five Hundred Thousand Dollars ($500,000).

     “Material Consents” means all Consents from Persons other than Governmental
Authorities that are listed in §1(f) of the Disclosure Schedule.

     “Material GS Contracts” has the meaning set forth in §4(i).

     “Mexico Gathering Agreement” means the Mexican gas gathering agreement between EGL and
EH, in the form of Exhibit F.

     “Mexico Processing Agreement” means the Mexican gas processing agreement between EGL
and EH, in the form of Exhibit G.

     “Non-Circumvention Agreement” means the Non-Circumvention Agreement in the form of
Exhibit H, pursuant to which Buyer and/or its Affiliates agree not to circumvent LEG’s
acquisition of gas from Petroleos Mexicanos.

     “Non-Material Consents” has the meaning set forth in §2(l)(ii).

     “Notice” has the meaning set forth in §8(g).

     “Olmos Formation” means the stratigraphic interval between the measured depths of
6,490 feet and 6,881 feet as seen in the LLP Beasley State 97 #26 (API #42-479-39424) located in
Webb County, Texas.

     “Ordinary Course of Business” means the ordinary course of business consistent with
past custom and practice (including with respect to quantity and frequency).

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     “Owned Real Property” has the meaning set forth in §2(a)(x).

     “Parent Guarantee” means the guaranty in the form of Exhibit I, under which
LEG guarantees Sellers’ obligations with respect to the Contemplated Transactions.

     “Parts Inventory” has the meaning set forth in §2(a)(vii).

     “Party” or “Parties” has the meaning set forth in the preface.

     “Permits” means all permits, licenses, certificates, orders, approvals,
authorizations, registrations, grants, Consents, concessions, warrants, franchises, and similar
rights and privileges granted by a Governmental Authority.

     “Permits Assignment” has the meaning set forth in §2(k)(i)(E).

     “Permitted Encumbrances” means: (1) real estate Taxes, assessments and other levies,
fees, or charges imposed by a Governmental Authority that are (a) not due and payable as of the
Closing Date, or (b) being contested in good faith by appropriate Proceedings; (2) any Lien
consisting of (i) rights reserved to or vested in any Governmental Authority to control or regulate
any Asset or to limit the use of such Asset in any manner which does not materially impair the use
of such Asset for the purposes for which it is held by Sellers, or (ii) obligations or duties to
any Governmental Authority with respect to any Permit relating to any period after Closing and the
rights reserved or vested in any Governmental Authority to terminate any such Permit or to condemn
or expropriate any property; (3) mechanics Liens and similar Liens for labor, materials, or
supplies provided with respect to Assets incurred prior to the Effective Time and in the Ordinary
Course of Business for amounts that are (A) not delinquent and would not, or would not reasonably
be expected to, in the aggregate, be material to the Assets or the Gathering System, or (B) being
contested in good faith by appropriate Proceedings; (4) zoning, building codes, and other land use
Laws regulating the use or occupancy of Owned Real Property or the activities conducted thereon
that are imposed by any Governmental Authority having jurisdiction over such Owned Real Property;
and (5) easements, servitudes, rights-of-way, covenants, conditions, restrictions, and other
similar matters affecting title to the Assets and other title defects that, singularly or in the
aggregate, do not or would not interfere with the present or proposed ownership, use or operation
of the Assets to which those matters relate and which are of a nature that would be reasonably
acceptable to a prudent pipeline operator.

     “Person” means an individual, a partnership, a corporation, a limited liability
company, an association, a joint stock company, a trust, a joint venture, an unincorporated
organization, any other business entity or a Governmental Authority (including any department,
agency, or political subdivision thereof).

     “Personal Property” has the meaning set forth in §2(a)(iv).

     “Plant Facilities” has the meaning set forth in §2(a)(i).

     “Post-Closing Settlement Statement” has the meaning set forth in §2(f).

     “Preliminary Settlement Statement” has the meaning set forth in §2(e).

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     “Proceeding” means any action, suit, claim, investigation, review, or other judicial
or administrative proceeding, at Law or in equity, before or by any Governmental Authority or
arbitration or other dispute resolution Proceeding.

     “Prudent Industry Practices” means at a particular time, any of the practices, methods
and acts which, in the exercise of reasonable judgment, will result in the proper operation and
maintenance of the Assets and shall include the practices, methods and acts engaged in or approved
by a significant portion of the industry at such time with respect to assets of the same or similar
types as the Assets. Prudent Industry Practices is not intended to be limited to the optimum
practice, method or act, to the exclusion of all others, but rather is a spectrum of possible
practices, methods and acts which could have been expected to accomplish the desired result at a
commercially reasonably cost consistent with reliability, safety, timeliness, and all applicable
Laws and Environmental Law. Prudent Industry Practices is intended to mean at least the same
standard as the Parties would, in the prudent management of their own properties, use from time to
time.

     “Qualified Beneficiaries” has the meaning set forth in §5(d).

     “Records” has the meaning set forth in §2(a)(ix).

     “Registrable Securities” has the meaning set forth in §6(f)(i).

     “Related Person” means, with respect to a particular individual:

     (a) each other member of such individual’s family;

     (b) any Person that is directly or indirectly controlled by any one or more members of
such individual’s family;

     (c) any Person in which members of such individual’s Family hold (individually or in
the aggregate) a material interest; and

     (d) any Person with respect to which one or more members of such individual’s family
serves as a director, officer, partner, executor or trustee (or in a similar capacity).

With respect to a specified Person other than an individual:

     (e) any Person that directly or indirectly controls, is directly or indirectly
controlled by or is directly or indirectly under common control with such specified Person;

     (f) any Person that holds a material interest in such specified Person;

     (g) each Person that serves as a director, officer, partner, executor or trustee of
such specified Person (or in a similar capacity);

     (h) any Person in which such specified Person holds a material interest; and

-12-

 

     (i) any Person with respect to which such specified Person serves as a general partner
or a trustee (or in a similar capacity).

     For purposes of this definition: (1) “control” (including “controlling,” “controlled by,” and
“under common control with”) means the possession, direct or indirect, of the power to direct or
cause the direction of the management and policies of a Person, whether through the ownership of
voting securities, by contract or otherwise, and shall be construed as such term is used in the
rules promulgated under the Securities Act; (2) the “family” of an individual includes (a) the
individual, (b) the individual’s spouse, (c) any other natural person who is related to the
individual or the individual’s spouse within the second degree and (d) any other natural person who
resides with such individual; and (3) “material interest” means direct or indirect beneficial
ownership (as defined in Rule 13d-3 under the Securities Exchange Act of 1934) of voting securities
or other voting interests representing at least 10% of the outstanding voting power of a Person or
equity securities or other equity interests representing at least 10% of the outstanding equity
securities or equity interests in a Person.

     “Release” means any spilling, leaking, pumping, pouring, emitting, emptying,
discharging, injecting, escaping, leaching, dumping, or disposing of Hazardous Materials into or
upon the environment (including the abandonment or discarding of barrels, containers, and other
closed receptacles containing any Hazardous Material and which are not empty as defined by 40
C.F.R. §261.7(b)).

     “Representative” means, with respect to a particular Person, any director, officer,
manager, employee, agent, consultant, advisor, accountant, financial advisor, legal counsel,
lender, insurer or other representative of that Person.

     “Restricted Material GS Contracts” has the meaning set forth in §2(l)(i).

     “Restricted Non-Material GS Contracts” has the meaning set forth in §2(l)(ii).

     “Securities Act” means the Securities Act of 1933, as amended.

     “Seller” or “Sellers” has the meaning set forth in preface.

     “Seller Adverse Consequences” means the Adverse Consequences of the Seller Indemnified
Parties as to which the Seller Indemnified Parties are entitled to indemnification under §7(b).

     “Seller Indemnified Parties” means Sellers and their respective Representatives and
Related Persons and each of the heirs, executors, successors and assigns of any of the preceding.

     “Seller Representative” has the meaning set forth in §8(k)

     “Service Standard” means, with respect to the standard of performance for the
Transition Services performed or caused to be performed, the good-faith undertaking, on a
commercially reasonable basis, to perform the Transition Services: (1) in at least the same quality
and manner as the same or comparable services were provided by Sellers and Sellers’ Affiliates
before the

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Effective Time; and (2) in all material respects in compliance with all applicable Laws,
Environmental Law and Prudent Industry Practices.

     “Shallow Rich Gathering Agreement” means the gas gathering agreement, in the form of
Exhibit J, for the gathering of gas produced from all depths shallower than one hundred
(100) feet below the base of the Olmos Formation.

     “Shallow Rich Processing Agreement” means the gas processing agreement, in the form of
Exhibit K, for the processing of gas produced from all depths shallower than one hundred
(100) feet below the base of the Olmos Formation.

     “Shelf Registration Notice” has the meaning set forth in §6(f)(iii).

     “Shelf Registration Statement” has the meaning set forth in §6(f)(i).

     “Special Warranty Deed” has the meaning set forth in §2(k)(i)(B).

     “Surviving Indemnification Obligations” means the indemnification obligations
described in §7(a)(ii), §7(a)(iii), §7(a)(iv) and §7(a)(v).

     “Tax” or “Taxes” means any federal, state, local, or foreign income, gross
receipts, license, payroll, employment, excise, severance, stamp, occupation, premium, windfall
profits, environmental (including Taxes under Code §59A), customs duties, capital stock, franchise,
profits, withholding, social security (or similar), unemployment, disability, real property,
personal property, sales, use, transfer, registration, value added, ad valorem, alternative or
add-on minimum, estimated, or other tax of any kind whatsoever, including any interest, penalty, or
addition thereto, whether disputed or not.

     “Tax Return” means any return, declaration, report, claim for refund, or information
return or statement relating to Taxes, including any schedule or attachment thereto, and including
any amendment thereof.

     “Tercero Navarro” means Tercero Navarro, Inc., a Delaware corporation and the general
partner of each of the Sellers.

     “Third Person” means any Person other than Sellers or Buyer.

     “Transaction Documents” means all Contracts, other than this Agreement, and the deeds,
instruments and assignments required to be entered into and delivered under this Agreement.

     “Transfer Date” has the meaning set forth in §5(b)(iii).

     “Transferred Employee” means any Affected Employee who accepts Buyer’s offer of
employment.

     “Transition Services” has the meaning set forth in §6(d).

     “Unit Closing Price” has the meaning set forth in §2(d).

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     “Violation” has the meaning set forth in §6(f)(v)(A).

     “VOC” means volatile organic compounds, excluding methane and ethane.

     “VOC Holdback Amount” means the sum of One Million Seven Hundred and Fifty Thousand
Dollars ($1,750,000).

§2. Purchase and Sale of Assets

     (a) Assets. On the terms and subject to the conditions of this Agreement and
effective for all purposes as of the Effective Time, at Closing, Buyer agrees to purchase, on a
going concern basis from Sellers, and Sellers agree to sell, transfer and deliver to Buyer (or one
or more Buyer Designees), free and clear of all Liens (other than Permitted Encumbrances), all
right, title, and interest in and to the assets properties, rights, licenses, Contracts, and
business, of every kind and description, wherever located, real, personal or mixed, tangible or
intangible, owned, held or used in the operation of the Gathering System by Sellers as the same
exists on the Closing Date, excluding the Excluded Assets (collectively, the “Assets”), and
including all right, title and interest in, to and under:

     (i) the gas processing plants, treaters, dehydration units, condensate storage tanks,
compressor stations, warehouses, field offices, control buildings and other associated plant
facilities which are part of the Gathering System, which are described in §2(a)(i) of the
Disclosure Schedule (collectively, the “Plant Facilities”);

     (ii) the Contracts of any kind that relate to the Gathering System and to which any
Seller or any of its Affiliates is a party, including all Contracts under which any Seller
is providing gas gathering and/or processing services to Third Persons, which Contracts are
listed in §2(a)(ii) of the Disclosure Schedule (the “Gathering System Contracts”);

     (iii) to the extent assignable to Buyer, the Permits required or necessary for Sellers
to own and operate the Gathering System in the places and in the manner currently owned or
operated or otherwise necessary to operate the Gathering System as it is currently operated,
which are listed in §2(a)(iii) of the Disclosure Schedule (the “Gathering System
Permits”);

     (iv) the personal property and interests therein, necessary for, used or held for use
in connection with the Gathering System, including all machinery, furniture, office
equipment, communications equipment, radios, vehicles, replacement parts, fuel and other
trade fixtures, fixed assets and other tangible personal property, which are listed in
§2(a)(iv) of the Disclosure Schedule, and all hydrocarbon inventory of the Gathering System,
including linefill (collectively, the “Personal Property”);

     (v) the natural gas gathering pipelines, residue gas pipelines and other gas pipelines
comprising the Gathering System, which are described in §2(a)(v) of the Disclosure Schedule
(the “Gathering Lines”);

     (vi) the fixtures, pipes, drips, valves, fittings, connections, regulators,
compressors, cathodic or electric protection units, gates, meters, measuring stations,

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meter and regulatory houses, other meter and regulation equipment, instruments, tanks,
storage facilities, expanders, dehydrators, heaters, heat exchangers, chillers, separators,
pumps, coolers, cooling towers, boilers, re-boilers, turbines, engines, generators, trucks,
automobiles, and other equipment related to or comprising a part of the Gathering Lines or
the Plant Facilities and all improvements, fixtures and appurtenances thereto used in the
operation of the Gathering System, which are described in §2(a)(vi) of the Disclosure
Schedule (the “Equipment”);

     (vii) the spare parts, pipe, valves and other similar items of inventory located on or
about the Gathering Lines and the Plant Facilities and intended for use in connection with
the Gathering System (the “Parts Inventory”);

     (viii) the natural gas, condensate and other hydrocarbons owned by Sellers and located
in the Gathering Lines, the Plant Facilities, the Equipment or elsewhere in the Gathering
System as of the Closing Date, including linefill;

     (ix) the contract, land, title, engineering, environmental, operating, accounting,
business, marketing, and other data, files, documents, instruments, notes, papers, ledgers,
journals, reports, abstracts, surveys, maps, keys, lock combinations, computer access codes
and similar information, books, records and studies which relate to the Gathering System
and/or the Assets or which are used, useful, or held for use in connection with, the
ownership, operation or maintenance of the Gathering System and the Assets, including all of
the same necessary to cause operations to remain in compliance with applicable Law,
including Environmental Law (collectively, the “Records”);

     (x) the lands and other surface estates described in §2(a)(x) of the Disclosure
Schedule (collectively, the “Owned Real Property”), and all appurtenances, Easements
and other rights, buildings and other improvements thereto or thereon not otherwise
described in this §2(a);

     (xi) the easements, rights-of-way, surface use agreements, servitudes, licenses,
Permits and other similar rights for the use of the surface or subsurface estate in
connection with the Gathering System, which are described in §2(a)(xi) of the Disclosure
Schedule (the “Easements”);

     (xii) the benefit of all prepaids, deferred costs, deposits, advances, credits and
expenses that have been prepaid by Sellers to the extent relating to the Gathering System
including, lease and rental payments; and

     (xiii) all of Sellers’ rights, claims, counterclaims, credits, causes of action,
lawsuits, judgments, demands or rights of set-off against third parties relating to the
Gathering System or the Assets, including unliquidated rights under manufacturers’ and
vendors’ warranties and all rights in and under any express or implied guarantees,
warranties, representations, covenants, indemnities and similar rights in favor of any
Seller.

In §2(a)(i) through §2(a)(xiii) of the Disclosure Schedule, Sellers shall, where applicable,
identify the owner of each of the Assets and the locations of all physical Assets.

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     (b) Excluded Assets. Buyer and Sellers agree that the following assets and properties
of Sellers related to the Gathering System or the Assets, as applicable, will be retained by
Sellers and are excluded from the Gathering System and the Assets (the “Excluded Assets”):

     (i) all deposits, cash, checks, funds and accounts receivable and other rights to
payment arising from or relating to the operation of the sale and transportation of natural
gas and natural gas condensate with respect to any period of time prior to the Effective
Time, including all Imbalance Receivables;

     (ii) any Personal Property that is sold or consumed by Sellers prior to Closing in the
Ordinary Course of Business;

     (iii) each Seller’s Governing Documents;

     (iv) any Seller’s contracts of insurance and any Seller’s employee benefit agreements,
plans, arrangements and policies, and any assets related thereto;

     (v) the rights that accrue to Sellers under this Agreement;

     (vi) the assets and properties described in §2(b)(vi) of the Disclosure Schedule; and

     (vii) the Interim Excluded Assets, until they are transferred to and accepted by ESTG.

     (c) Liabilities.

     (i) Subject to §6(e), effective as of the close of business on the Closing Date, Buyer
(or one or more Buyer designees) shall assume and agree to pay, discharge or perform, as
appropriate: (1) the Liabilities of Sellers under the Gathering System Contracts, Easements,
and Gathering System Permits to the extent those Liabilities are not required to be
performed prior to the Closing Date, do not arise out of or relate to a Breach that occurred
prior to the Closing Date, are disclosed on the face of such documents, and accrue and
relate to the operations of the Gathering System after the Closing Date; (2) any Liabilities
arising out of and attributable to the operation of the Gathering System and the Assets
after the Closing Date; (3) the Assumed Environmental Liabilities; and (4) any Liabilities
arising out of and attributable to the operation of the Interim Excluded Assets after they
have been transferred to ESTG or another Buyer Designee, and that Person has accepted the
Interim Excluded Assets as provided under §6(l) (those Liabilities, collectively the
“Assumed Liabilities”).

     (ii) Notwithstanding any provision in this Agreement or any other writing to the
contrary, Buyer is assuming only the Assumed Liabilities and is not assuming any other
Liability of Sellers or their Affiliates. All such other Liabilities will remain
Liabilities of Sellers and/or their Affiliates (those Liabilities not being assumed by
Buyer, the “Excluded Liabilities”).

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     (d) Estimated Purchase Price. At Closing, Buyer agrees to pay to Sellers the Base
Purchase Price for the Assets, adjusted up or down by: (1) the estimated net difference of the
Imbalance Receivables and Imbalance Payables; (2) the value of all Condensate Inventory; (3)
accounts receivable and accounts payable existing as of the Effective Time under operating
Contracts between Affiliates of the Parties; (4) prorated ad valorem taxes; (5) the Enterprise
Texas Pipeline PSA/Lease Termination Payment (the Base Purchase Price, as adjusted, the
“Estimated Purchase Price”), payable in cash and Enterprise Units; and (6) the VOC Holdback
Amount. The Estimated Purchase Price allocation between cash and Enterprise Units is set forth on
§2(d) of the Disclosure Schedule. The number of Enterprise Units shall be determined by dividing
that portion of the Estimated Purchase Price payable in Enterprise Units by the Unit Closing Price
(hereafter defined); provided, if the number so determined contains a fraction, such number shall
be rounded upward to the nearest whole number. “Unit Closing Price” means the average
closing price of Enterprise Units on the New York Stock Exchange over the ten consecutive trading
days prior to the Closing Date.

     (e) Preliminary Settlement Statement. Attached as §2(e) of the Disclosure Schedule is
a written statement of the Parties’ calculation of the Estimated Purchase Price based on
information available to Parties as of the Closing Date (the “Preliminary Settlement
Statement”). The Preliminary Settlement Statement includes wire transfer instructions for the
Closing payments to be made to Cerrito

     (f) Post-Closing Adjustment Procedure. The Parties acknowledge that as of the
Effective Time, the Gathering System may be subject to Imbalances. Sellers shall use reasonable
efforts to minimize the extent of the Imbalances. Buyer shall use reasonable efforts to prepare
and deliver to the Seller Representative, as soon as practicable but no later than 30 days after
the Closing Date, in accordance with this Agreement and GAAP, a statement (the “Post-Closing
Settlement Statement”) setting forth any changes to the Pre-Closing Settlement Statement, each
adjustment or payment that was not finally determined as of the Closing Date, the calculation of
such adjustments and a proposed final purchase price, which will include interest from and
including the Effective Time to, but excluding, the Closing Date, at the Applicable Rate calculated
on the basis of a 365-day year (the “Final Purchase Price”). Within 15 days after receipt
of the Post-Closing Settlement Statement, the Seller Representative shall deliver to Buyer a
written report containing any changes that Sellers propose be made to the Post-Closing Settlement
Statement. The Parties shall undertake to agree to the Final Purchase Price and any amounts due
pursuant to such post-closing adjustment no later than 15 days after Buyer has received Sellers’
proposed changes. If Buyer and Sellers cannot agree on the Post-Closing Settlement Statement
within 60 days after the Closing Date, the Parties shall engage an internationally recognized
public accounting firm acceptable to Buyer and Sellers (the “Independent Accounting Firm”),
to resolve any disputed amounts (and only those amounts). Buyer, on the one hand, and Sellers, on
the other hand, each must pay one half of the fees and other costs of the Independent Accounting
Firm. If the Parties engage the Independent Accounting Firm under this §2(f), Sellers and Buyer
shall provide the Independent Accounting Firm with a detailed statement itemizing any disputed
amounts and all records and other information relevant to the determination of the amounts. The
Parties shall instruct the Independent Accounting Firm to make those calculations as soon as
practicable. The final determination of any of the disputed items as calculated under this §2(f)
is binding on the Parties. The date upon which such agreement is reached or upon which the Final
Purchase Price is

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established shall be called the “Final Settlement Date.” If the Final Purchase Price
is more than the Estimated Purchase Price, Buyer will pay in immediately available funds the amount
of that difference to Sellers or to Sellers’ account (as designated by the Seller Representative).
If the Final Purchase Price is less than the Estimated Purchase Price, Sellers will pay in
immediately available funds the amount of that difference to Buyer or to Buyer’s account (as
designated by Buyer). Buyer or Sellers, as the case may be, shall pay the amount of the difference
within five Business Days after the Final Settlement Date.

     (g) Final Purchase Price Allocation. Once the Final Purchase Price is determined,
Sellers and Buyer agree that the Final Purchase Price will be allocated to the Assets for Tax and
financial accounting purposes by Ernst & Young LLP, within 120 days after Final Settlement Date.
Sellers and Buyer agree: (1) to report the federal, state and local income and other Tax
consequences of the Contemplated Transactions, and in particular to report the information required
by Section 1060(b) of the Code, and to jointly prepare Form 8594 (Asset Acquisition Statement under
Section 1060) in a manner consistent with such allocation; and (2) without the Consent of the other
Party, not to take any position inconsistent therewith upon examination of any Tax return, in any
refund claim, in any litigation, investigation or otherwise. Sellers and Buyer agree that each
will furnish the other a copy of Form 8594 (Asset Acquisition Statement under Section 1060)
proposed to be filed with the Internal Revenue Service by such Party or any Affiliate thereof
within ten days prior to the filing of such form with the Internal Revenue Service. No later than
August 31, 2006, Sellers shall notify Buyer of Sellers’ Tax basis in the Assets.

     (h) Sellers’ Liability for Taxes. Sellers will be responsible for paying, or
reimbursing Buyer for the payment of, all ad valorem, property, production, severance and similar
Taxes and assessments based upon or measured by the ownership of property or the production of
hydrocarbons or the receipt of proceeds therefrom accruing to the Assets prior to the Effective
Time.

     (i) Prorations. With respect to amounts subject to pro-ration under this Agreement,
if actual figures are not available at the Closing Date, the proration will be based upon the
amounts accrued through the Effective Time or paid for the most recent year (or other appropriate
period) for which actual amounts paid are available. Such prorated amounts will be re-prorated and
paid to the appropriate Party within 60 days after the date that the previously unavailable actual
figures become available. The prorations will be based on the number of days in a year or other
appropriate period before and after the Effective Time. Sellers and Buyer agree to furnish each
other with such documents and other records as may be reasonably requested in order to confirm all
adjustment and proration calculations made under this Agreement.

     (j) Closing. The closing of the Contemplated Transactions (the “Closing”)
will take place at the offices of King & Spalding in Houston, Texas, simultaneously with the
Parties’ execution and delivery of this Agreement and the execution and delivery of the Transaction
Documents by the parties to the Transaction Documents. At Closing, Buyer will purchase the Assets
from Sellers and simultaneously contribute such Assets to the Buyer Designees by way of direct
assignment from Sellers to such Buyer Designees as provided in this Agreement.

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     (k) Closing Obligations. In addition to any other documents to be delivered under
other provisions of this Agreement, at Closing:

     (i) Sellers or LEG, as applicable, shall deliver to Buyer, the following:

     (A) an executed counterpart from Sellers of a Bill of Sale covering the Assets
in the form attached hereto as Exhibit L (the “Bill of Sale”);

     (B) an executed counterpart from Cerrito of a special warranty deed covering
the Owned Real Property in the form of Exhibit M (the “Special Warranty
Deed”);

     (C) an executed counterpart from Cerrito and EGL of the Assignment and Bill of
Sale of the Gathering Lines in the form of Exhibit N (the “Gathering
Lines Assignment”);

     (D) an executed counterpart from Cerrito of the Assignment and Bill of Sale of
the Canales 12” Gathering Line in the form of Exhibit O (the “Canales
12” Gathering Line Assignment”);

     (E) an executed counterpart from Cerrito and EGL of the Assignment and
Assumption of Gathering System Permits in the form of Exhibit P, which
assignment also contains Buyer’s undertaking and assumption of the Assumed
Liabilities relating to the Gathering System Permits (the “Gathering System
Permits Assignment”);

     (F) an executed counterpart from CGL of an Assignment and Assumption of the
Gathering System Contracts in the form of Exhibit Q, which assignment also
contains Buyer’s undertaking and assumption of the Assumed Liabilities relating to
the Gathering System Contracts (the “Gathering System Contracts
Assignment”);

     (G) an executed counterpart from Cerrito and EGL of an Assignment and
Assumption of Easements in the form of Exhibit R, which assignment will also
contain Buyer’s undertaking and assumption of the Assumed Liabilities relating to
the Easements (the “Easements Assignment”);

     (H) such other deeds, bills of sale, assignments, certificates of title,
affidavits, indemnity agreements, closing statements, cross receipts, documents, and
other instruments as Buyer may reasonably request in order to consummate the
Contemplated Transactions;

     (I) an executed counterpart from LPP of the Shallow Rich Gathering Agreement;

     (J) an executed counterpart from LPP of the Shallow Rich Processing Agreement;

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     (K) an executed counterpart from LPP of the Deep Rich Gathering Agreement;

     (L) an executed counterpart from LPP of the Deep Rich Processing Agreement;

     (M) an executed counterpart from EGL of the Lean Gas Gathering Agreement;

     (N) an executed counterpart from EGL of the Mexico Gathering Agreement;

     (O) an executed counterpart from EGL of the Mexico Processing Agreement;

     (P) an executed counterpart from EGL of the Enterprise Texas Pipeline PSA/Lease
Termination Letter;

     (Q) a certificate of good standing, existence, or similar document with respect
to Tercero Navarro and each Seller issued by the appropriate Governmental Authority
of the jurisdiction of its formation as of a date not more than 30 days prior to the
Closing Date;

     (R) a certificate of the secretary of Tercero Navarro dated the Closing Date:
(1) setting forth the resolutions of the board of directors of Tercero Navarro
authorizing the execution and delivery by Tercero Navarro and each Seller of this
Agreement, the Transaction Documents and the consummation by those Parties of the
Contemplated Transactions, and certifying that such resolutions were duly adopted
and have not been rescinded or amended as of the Closing Date; and (2) attesting as
to the incumbency and signature of each manager or officer of Tercero Navarro who
will execute this Agreement or any Transaction Documents;

     (S) evidence reasonably satisfactory to Buyer of the release and discharge of
all Liens and encumbrances securing any Indebtedness with respect to the Assets,
including payoff letters and UCC-3 Termination Statements (or partial
release/amendments, as applicable) with respect to all security interests filed
against or encumbering any Asset, duly executed instruments of release, partial
release, or reconveyance, as applicable, with respect to each of the real estate
mortgages/deeds of trust securing any Indebtedness over any Asset, each delivered
and filed in the appropriate public offices, and each other instrument, notice,
release, or certificate necessary to effectuate the termination and release of the
any Liens or security interests encumbering any of the Assets;

     (T) an executed counterpart of the Non-Circumvention Agreement between EGL and
Buyer; and

     (U) an executed Parent Guaranty from LEG.

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     (ii) Buyer shall deliver the following to Sellers:

     (A) the Estimated Purchase Price, payable in cash and Enterprise Units as
described in §2(d) of the Disclosure Schedule;

     (B) an executed counterpart from ESTG of the Bill of Sale;

     (C) an executed counterpart from ESTG of the Special Warranty Deed;

     (D) an executed counterpart from ESTG of the Gathering Lines Assignment;

     (E) an executed counterpart from ETPL of the Canales 12” Gathering Line
Assignment;

     (F) an executed counterpart from ESTG of the Gathering System Permits
Assignment;

     (G) an executed counterpart from ESTG of the Gathering System Contracts
Assignment;

     (H) an executed counterpart from ESTG of the Easements Assignment;

     (I) a certificate of good standing, existence, or similar document with respect
to Buyer issued by the appropriate Governmental Authority of the jurisdiction of its
formation as of a date not more than 30 days prior to the Closing Date;

     (J) a certificate of the assistant secretary of Enterprise Products GP, LLC
dated the Closing Date: (1) setting forth the resolutions of the board of directors
of the Enterprise Products GP, LLC authorizing the execution and delivery by Buyer
of this Agreement and the Transaction Documents and the consummation by Buyer of the
Contemplated Transactions, and certifying that such resolutions were duly adopted
and have not been rescinded or amended as of the Closing Date; and (2) attesting as
to the incumbency and signature of each director or officer of Enterprise Products
GP, LLC who will execute this Agreement or any Transaction Documents;

     (K) an executed counterpart from EH of the Shallow Rich Gathering Agreement;

     (L) an executed counterpart from EH of the Shallow Rich Processing Agreement;

     (M) an executed counterpart from EH of the Deep Rich Gathering Agreement;

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     (N) an executed counterpart from EH of the Deep Rich Processing Agreement;

     (O) an executed counterpart from EH of the Lean Gas Gathering Agreement;

     (P) an executed counterpart from EH of the Mexico Gathering Agreement;

     (Q) an executed counterpart from EH of the Mexico Processing Agreement;

     (R) an executed counterpart from ETPL of the Enterprise Texas Pipeline
PSA/Lease Termination Letter; and

     (S) an executed counterpart from Buyer of the Non-Circumvention Agreement.

     (l) Material Consents.

     (i) If any Material Consents have not yet been obtained (or otherwise are not in full
force and effect) as of Closing, in the case of each Material GS Contract as to which such
Material Consents were not obtained (or otherwise are not in full force and effect) (the
“Restricted Material GS Contracts”), Buyer shall either:

     (A) continue the effort to obtain the Consents; or

     (B) elect to have Sellers retain that Restricted Material GS Contract and all
Liabilities arising therefrom or relating thereto.

     If Buyer elects to continue efforts to obtain any Material Consents, neither this
Agreement nor any Transaction Documents will constitute a sale, assignment, assumption,
transfer, conveyance or delivery or an attempted sale, assignment, assumption, transfer,
conveyance or delivery of any Restricted Material GS Contract, and following Closing, Buyer
shall use Best Efforts to obtain the Material Consents as quickly as practicable. Seller
agrees to cooperate with Buyer in obtaining the Material Consents. Until a Material Consent
for any Restricted Material GS Contract is obtained, the Parties shall cooperate with each
other in any reasonable and lawful arrangements designed to provide to Buyer the benefits of
use of the Restricted Material GS Contract for its term (or any right or benefit arising
thereunder, including the enforcement for the benefit of Buyer of any and all rights of any
Seller against a Third Person under that Restricted Material GS Contract). No Seller will
take any action or suffer any omission which would limit or restrict or terminate in any
material respect the benefits to Buyer of any Restricted Material GS Contract unless, in
good faith and after consultation with and prior written Notice to Buyer, that Seller is
ordered orally or in writing to do so by a Governmental Authority of competent jurisdiction
or that Seller is otherwise required to do so by Law; provided that if any such order is
appealable, that Seller will, at Buyer’s cost and expense, take any actions that Buyer
requests to file and pursue that appeal and

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to obtain a stay of that order. Once a Material Consent for the sale, assignment,
assumption, transfer, conveyance and delivery of a Restricted Material GS Contract is
obtained, Sellers shall promptly assign, transfer, convey and deliver that Restricted
Material GS Contract to Buyer, and Buyer shall assume the Liabilities under that Restricted
Material GS Contract assigned to Buyer from and after the date of assignment to Buyer by
execution and delivery of an instrument of conveyance reasonably satisfactory to Buyer
within three Business Days following receipt of that Material Consent.

     (ii) If there are any Consents necessary for the assignment and transfer to Buyer of
any contractual Assets not listed on §1(e) of the Disclosure Schedule (the “Non-Material
Consents”) which have not yet been obtained (or otherwise are not in full force and
effect) as of Closing, Buyer shall elect at Closing, in the case of each of the contracts as
to which such Non-Material Consents were not obtained (or otherwise are not in full force
and effect) (the “Restricted Non-Material GS Contracts”), whether to:

     (A) accept the assignment of such Restricted Non-Material GS Contract, in which
case, as between Buyer and Sellers, such Restricted Non-Material GS Contract shall,
to the maximum extent practicable and notwithstanding the failure to obtain the
applicable Non-Material Consent, be transferred at Closing pursuant to the
applicable Assignment of Contracts as elsewhere provided under this Agreement; or

     (B) reject the assignment of such Restricted Non-Material GS Contract, in which
case: (1) neither this Agreement nor the applicable Gathering System Contracts
Assignment nor any other Transaction Document will constitute a sale, assignment,
assumption, conveyance or delivery or an attempted sale, assignment, assumption,
transfer, conveyance or delivery of such Restricted Non-Material GS Contract; and
(2) Sellers shall retain such Restricted Non-Material GS Contract and all
Liabilities arising therefrom or relating thereto.

§3. Representations and Warranties of Buyer

     Buyer represents and warrants to Sellers that the statements contained in this §3 are correct
and complete as of the Closing Date.

     (a) Organization. Buyer is a limited partnership duly organized, validly existing,
and in good standing under the Laws of the State of Delaware, and Enterprise Products GP, LLC is a
limited liability company duly organized, validly existing, and in good standing under the Laws of
the State of Delaware.

     (b) Authorization of Transaction. Buyer has requisite power and authority to execute
and deliver this Agreement, and Enterprise Products GP, LLC has all requisite authority on behalf
of Buyer to grant all of the partnership actions described in this §3(b) and to perform its
obligations under this Agreement and the applicable Transaction Documents. This Agreement and the
applicable Transaction Documents have been duly executed by Buyer and constitute the valid and
legally binding obligation of Buyer, enforceable in accordance with its terms and

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conditions, subject to General Exceptions to Enforceability. Except for filings required
under the HSR Act, Buyer need not give any Notice to, make any filing with, or obtain any Consent
of any Governmental Authority in order to consummate the Contemplated Transactions or to affect the
legality, validity, binding effect, or enforceability of this Agreement or any applicable
Transaction Document. The execution, delivery, and performance of all of the Contemplated
Transactions have been duly authorized by Buyer.

     (c) Non-contravention. Neither the execution and delivery of this Agreement, nor the
consummation of the Contemplated Transactions, will: (1) violate any Law or other restriction of
any Governmental Authority to which Buyer is subject or any provision of its Governing Documents;
or (2) result in a Breach of, constitute a default (or an event which with the giving of notice or
lapse of time, or both, would become a default) under, result in the acceleration of, create in any
Third Person the right to accelerate, terminate, modify, or cancel, or require any notice or
Consent under any Contract, license or other arrangement to which Buyer is a party or by which it
is bound or to which any of its assets is subject, except where the violation, conflict, Breach,
default, acceleration, termination, modification, cancellation, failure to give notice, or Lien
would not, or would not reasonably be expected to, individually or in the aggregate, be materially
adverse to Buyer.

     (d) Brokers’ Fees. Buyer has no Liability to pay any fees or commissions to any
broker, finder, or agent with respect to the Contemplated Transactions for which Sellers could
become liable or obligated.

     (e) Available Funds and Enterprise Units. Buyer has sufficient cash resources and
Enterprise Units to enable it to make payment in immediately available funds of the cash component
of the Estimated Purchase Price and the issuance of Enterprise Units, at Closing as a result of the
Contemplated Transactions.

     (f) Qualified for Gathering System Permits. To the Knowledge of Buyer, it is
qualified to obtain, maintain, and control as of the Closing each material Gathering System Permit.

     (g) Independent Investigation. Buyer is knowledgeable in the business of: (1) owning
and operating natural gas gathering, processing, and treatment facilities; (2) handling, storage,
and delivery of natural gas, natural gas liquids, and condensate through pipeline systems; and (3)
marketing of natural gas, natural gas liquids and condensate and has had access to the Assets,
Sellers’ Representatives, and Sellers’ Records. In making the decision to enter into the
Contemplated Transactions, Buyer has relied solely on its own independent due diligence
investigations regarding the Assets, the representations and warranties of Sellers made in this
Agreement and the Transaction Documents, and the covenants and undertakings of Sellers and LEG in
this Agreement and the Transaction Documents. BUYER ACKNOWLEDGES THAT, EXCEPT AS EXPRESSLY SET OUT
IN THIS AGREEMENT OR ANY TRANSACTION DOCUMENT, SELLERS HAVE NOT MADE ANY REPRESENTATION OR WARRANTY
OF ANY KIND OR NATURE, EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WARRANTIES OF THE CONDITION,
USEFULNESS OR ADEQUACY OF THE ASSETS, QUALITY, MERCHANTABILITY, AND/OR FITNESS FOR A PARTICULAR
PURPOSE, MARKETABILITY, AND CONFORMITY TO SAMPLES,

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AND BUYER IS ACQUIRING THE GATHERING SYSTEM AND THE ASSETS ON AN “AS IS, WHERE IS” BASIS.

§4. Representations and Warranties of Sellers

     Sellers represent and warrant to Buyer that the statements contained in this §4 are correct
and complete, except as set forth in the Disclosure Schedule attached to this Agreement (the
“Disclosure Schedule”).

     (a) Organization, Qualification, and Power. Each Seller is a limited partnership duly
organized, validly existing and in good standing under the Laws of the State of Texas. Each Seller
is duly authorized to own, lease and operate the Assets and the Gathering System and conduct
business, and is qualified under the Laws of each jurisdiction where such qualification is
required, except where the lack of such qualification would not, or would not reasonably be
expected to, individually or in the aggregate, have a Material Adverse Effect. Each Seller has the
requisite limited partnership power and authority to carry on its business and to own and use the
Assets owned and used by it.

     (b) Authorization of Transaction. Each Seller has requisite power and authority,
including authority granted to each by Tercero Navarro, the general partner of each Seller, to
execute and deliver this Agreement and the applicable Transaction Documents and to perform its
obligations under this Agreement, and Tercero Navarro has all requisite authority on behalf of each
Seller to grant all of the partnership actions described in this §4(b). This Agreement and the
applicable Transaction Documents have been duly executed by the Sellers and constitute the valid
and legally binding obligations of Sellers, enforceable in accordance with its terms and
conditions, subject to General Exceptions to Enforceability. The execution, delivery, and
performance of all of the Contemplated Transactions have been duly authorized by Sellers.

     (c) Non-contravention. Neither the execution and delivery of this Agreement or any
applicable Transaction Document, will: (1) violate any Law or other restriction of any Governmental
Authority to which any Sellers are subject or any provision of the Governing Documents of Cerrito,
CGM and EGL; or (2) conflict with, result in a Breach of, constitute a default (or an event which
with the giving of notice or lapse of time, or both, would become a default) under, result in the
acceleration of, create in any Third Person the right to accelerate, terminate, modify, or cancel,
or require any notice or Consent under any Contract, license, instrument, or other arrangement to
which Cerrito, CGM or EGL is a party or by which it is bound or to which any of the Assets is
subject (or result in the imposition of any Lien upon any of the Assets), except where the
violation, conflict, Breach, default, acceleration, termination, modification, cancellation,
failure to give notice, or Lien would not, or would not reasonably be expected to, individually or
in the aggregate be material to Sellers taken as a whole or to the Gathering Systems or the Assets.
Except as set forth in §4(c) of the Disclosure Schedule with respect to HSR Act filings, Sellers
do not need to give any notice to, make any filing with, or obtain any Consent of any Governmental
Authority in order for the Parties to consummate the Contemplated Transactions.

     (d) Brokers’ Fees. Neither Sellers nor LEG has entered into any Contract or
arrangement that would result in any Liability to pay any fees or commissions to any broker,

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finder, or agent with respect to the Contemplated Transactions for which Buyer or any of its
Affiliates could become liable or obligated.

     (e) Assets.

     (i) Except as set forth on §4(e)(i) of the Disclosure Schedule, Cerrito, CGM or EGL, as
applicable: (1) owns or leases all Assets necessary for the operation of the Gathering
System as presently conducted, free and clear of all Liens (except for Permitted
Encumbrances); and (2) has valid and indefeasible title to all owned Assets, and has valid
leasehold interests in all leased Assets, free and clear of all Liens (except for Permitted
Encumbrances).

     (ii) Neither Cerrito nor EGL has received written notice of any claims or disputes
which challenge the rights of Cerrito or EGL to use, or allege a Breach or default under any
Contracts granting to Cerrito or EGL rights to pipeline easements, right-of-way, licenses,
and land use Permits, which claims or disputes, Breaches, or defaults would, or would be
reasonably likely to, individually or in the aggregate, have a Material Adverse Effect.
§4(e)(ii) of the Disclosure Schedule set forth all Assets which are subject to Consent to
assign. Sellers are currently operating the Assets in material compliance with applicable
Laws.

     (iii) The Assets constitute all of the assets and properties which are necessary for
the current operation of the Gathering System.

     (f) Subsequent Events. Except as set forth on §4(f) of the Disclosure Schedule, since
December 31, 2005: (1) there has not been any Material Adverse Change; and (2) the Gathering System
has been operated only in the Ordinary Course of Business. Without limiting the generality of the
foregoing, since that date no Seller has:

     (i) sold, leased, transferred, or assigned any of the Assets, tangible or intangible,
other than for a fair consideration in the Ordinary Course of Business;

     (ii) entered into any Gathering System Contract or license (or series of related
Contracts and licenses) either involving more than Five Hundred Thousand Dollars ($500,000)
or outside the Ordinary Course of Business;

     (iii) accelerated, terminated, modified, or cancelled any Gathering System Contract or
license (or series of related Contracts and licenses) (x) involving more than Five Hundred
Thousand Dollars ($500,000) to which it is a party or by which it is bound, or (y) which is
necessary to the operation of the Gathering System;

     (iv) imposed any Lien upon any of the Assets, tangible or intangible;

     (v) made any capital expenditure with respect to the Assets (or series of related
capital expenditures) outside the Ordinary Course of Business;

     (vi) experienced any material damage, destruction, or loss (whether or not covered by
insurance) to any of the Assets;

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     (vii) made or changed any election relating to Taxes related to the Assets, settled any
claim or assessment relating to Taxes, or consented to any claim or assessment relating to
Taxes or any waiver of the statute of limitations for any such claim or assessment;

     (viii) terminated, had terminated, or materially altered any Gathering System Contracts
between such Seller and any of its principal customers or suppliers as listed in §4(f)(viii)
of the Disclosure Schedule;

     (ix) entered into any settlement of any pending or threatened Proceeding relating to
the Assets other than solely for cash; or

     (x) committed to do any of the foregoing.

     (g) Legal Compliance. Each Seller has complied with all applicable Laws related to
the Assets and the Gathering System, the operation of the Assets and the Gathering System, and the
Affected Employees, except where the failure to comply would not, or would not reasonably be
expected to, individually or in the aggregate, have a Material Adverse Effect. Sellers have not
received any written communication from any Governmental Authority or any other Person that alleges
that the Gathering System or the Assets may not be in compliance, or may be subject to Liability,
under any Law. Except as set forth in §4(g) of the Disclosure Schedule there are no
investigations, Proceedings, or reviews pending or, to the Knowledge of each Seller, threatened by
any Governmental Authority or other Person relating to any alleged violation of Law arising out of
or related to the operation of the Gathering System.

     (h) Real Property. §4(h) of the Disclosure Schedule sets forth the address and
description of each parcel of Owned Real Property. With respect to each such parcel of Owned Real
Property, and except for matters that would not, or would not reasonably be expected to,
individually or in the aggregate, have a Material Adverse Effect and except as noted in §4(h)(i) of
the Disclosure Schedule:

     (i) Sellers have valid and indefeasible title, free and clear of all Liens (except
Permitted Encumbrances);

     (ii) Sellers have not leased or otherwise granted to any Third Person the right to use
or occupy such Owned Real Property or any portion thereof and there are no other Third
Persons (other than Sellers) in possession of Owned Real Property;

     (iii) no Owned Real Property is in violation of any applicable Laws;

     (iv) there are no pending or, to the Knowledge of each Seller, threatened Proceedings
to which any Seller is a party before any Governmental Authority with respect to the Owned
Real Property, including any condemnation, expropriation or other similar Proceeding
commenced by any Governmental Authority having the power to eminent domain against the Owned
Real Property or any improvement therein. There is no pending application, Proceeding or
other action before any Governmental Authority to which any Seller is a party or of which
any Seller has received written notice with respect to zoning, licenses, Permits or other
matters affecting the Owned Real Property;

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     (v) there has been no unrestored fire or other casualty damage which has affected any
of the Owned Real Property;

     (vi) there are no outstanding options, rights of first offer, or rights of first
refusal to purchase any Owned Real Property or any portion thereof or interest therein; and

     (vii) rights of ingress and egress to and from the Owned Real Property are adequate for
the intended uses of the Owned Real Property.

     (i) Material GS Contracts. §4(i) of the Disclosure Schedule lists the following
Gathering Systems Contracts (the “Material GS Contracts”):

     (i) all gas purchase Contracts, transportation Contracts, hedging Contracts, swap
Contracts, Liabilities in respect of letters of credit, guarantees, joint venture Contracts,
and other instruments, or otherwise relating to the Assets; and

     (ii) all other instruments relating to the Assets and the purchase, transportation by
pipeline, gas processing, marketing, sale and supply of natural gas and other hydrocarbons.

     (iii) any Contract (or group of related Contracts) for the lease of personal property
to or from any Person providing for lease payments in excess of One Hundred Thousand Dollars
($100,000) per annum;

     (iv) any Contract concerning a partnership or joint venture;

     (v) any Contract (or group of related Gathering System Contracts) under which it has
created, incurred, assumed, or guaranteed any indebtedness for borrowed money, or any
capitalized lease obligation;

     (vi) any Contract concerning confidentiality or noncompetition;

     (vii) any Contract under which the consequences of a default or termination could have
a Material Adverse Effect;

     (viii) any Easement; and

     (ix) any other Contracts (or group of related Contracts) not enumerated in this §4(h),
the performance of which involves consideration in excess of Two Hundred and Fifty Thousand
Dollars ($250,000).

Sellers have made available to Buyer a correct and complete copy of each written Material GS
Contract and Material Lease. With respect to each such Contract: (1) the Contract is legal, valid,
binding, enforceable, and in full force and effect; (2) except as otherwise indicated in the
Disclosure Schedule, the Contract will continue to be legal, valid, binding, enforceable, and in
full force and effect on identical terms following the consummation of the Contemplated
Transactions, and the assignment to Buyer or to any Buyer Designee will not violate any Laws;

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(3) Cerrito, CGM or EGL, as applicable, is not in Breach or default, and no event has occurred
which with notice or lapse of time would constitute a Breach or default by Sellers, or permit
termination, modification, or acceleration, under the Contract; and (4) to the Knowledge of each
Seller, no other party is in Breach or default, and no event has occurred which with notice or
lapse of time would constitute a Breach or default by such other party, or permit termination,
modification or acceleration under the Contract other than in accordance with its terms nor has any
other party repudiated any provision of the Contract. Upon assignment to Buyer or its designee of
the HPLC Gas Purchase Agreement, Buyer or its designee shall have sole and exclusive claim to the
Bonus Payment, as provided for in the HPLC Gas Purchase Agreement, including for all gas purchased
pursuant to that certain Gas Purchase Agreement between HPLC and LPP dated effective August 1,
2005, as amended by the First Amendment to Gas Purchase Agreement dated October 1, 2005.

     (j) Litigation. There is no injunction, restraining order or Proceeding pending
against any Seller that restrains or prohibits the consummation of the Contemplated Transactions.
Except for the Proceedings identified on §4(j) of the Disclosure Schedule, there are no Proceedings
pending, or to the Knowledge of any Seller threatened, against or affecting the Assets, the
Gathering System or Sellers’ ownership or operation of the Assets or the Gathering System, the
Affected Employees before or by any Governmental Authority or any Person. Notwithstanding anything
in this Agreement to the contrary, the provisions of this §4(j) shall not relate to or cover
Proceedings related to Environmental Laws with respect to the Assets which are covered exclusively
by §4(m).

     (k) Labor and Employment.

     (i) None of the Sellers is a state or federal governmental contractor.

     (ii) None of the Sellers is a party to or bound by any collective bargaining agreement
or any other Contract with any labor union or organization, and no Contract is being
negotiated. Since January 1, 2004, none of the Sellers have experienced any strikes, work
stoppages, slow downs, picketing or any other interference with work or production,
grievances, claims of unfair labor practices, or other collective bargaining disputes or
concerted action by their employees.

     (l) Gathering System Permits. Except as set forth in §4(l) of the Disclosure
Schedule:

     (i) all Gathering System Permits have been obtained and are in full force and effect;

     (ii) no Seller has received written notification concerning violations that are
currently in existence with respect to any Gathering System Permit; and

     (iii) no Proceeding is pending or, to the Knowledge of any Seller, has been threatened
with respect to the revocation or limitation of any Gathering System Permit.

Notwithstanding anything in this Agreement to the contrary, the provisions of this §4(l) shall not
relate to or cover any Permit or matter relating to or arising out of any Environmental Laws

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relating to the Assets and/or the Gathering System.

     (m) Environmental Matters.

     (i) Except as set forth in §4(m) of the Disclosure Schedule, to the Knowledge of
Sellers, no Seller has caused or allowed the generation, use, treatment, transportation,
recycling, reclamation, handling, manufacture, storage, or disposal of, or exposure of any
Person or property to, any Hazardous Materials at, on or from the Assets, except in material
compliance with all applicable Environmental Laws.

     (ii) To the Knowledge of any Seller, there has been no Release of any Hazardous
Materials at, on, from, or underlying any of the Assets and the Gathering System in
violation of applicable Environmental Laws or in any concentration or location that requires
investigation or remediation or other corrective action under Environmental Laws or could
otherwise result in a material Liability under applicable Environmental Laws.

     (iii) Sellers have secured all material Permits required under Environmental Laws for
the ownership, use, and operation of the Gathering System and Assets, such Permits are in
full force and effect and are not subject to any challenge, revocation action, or
modification Proceeding by any Person, and Sellers are in material compliance with such
Permits.

     (iv) Sellers have received no written inquiry or notice of any actual or threatened
claim, Liability, or investigation related to or arising under any Environmental Law
relating to the Assets or the Gathering System.

     (v) Sellers are not operating the Gathering System or any of the Assets under any
waiver, compliance order, decree, or Contract, any consent decree or order, or corrective
action decree or order issued by or entered into with any Governmental Authority under any
Environmental Law or any Law regarding health or safety in the workplace.

     (vi) Sellers, the Assets, and the Gathering System operations are and, within the term
of all applicable statutes of limitations, have been in compliance with Environmental Laws
with respect to any matter that is not referred to in clauses (ii) through (v), and (vii)
through (x) of this §4(m), except where the lack of such compliance would not, or would not
reasonably be expected to, individually or in the aggregate, have a Material Adverse Effect.

     (vii) (1) No Seller has been named or, to the Knowledge of any Seller, threatened to be
named as a potentially responsible party under CERCLA or any similar state Law relating to
the Assets; (2) none of the Assets has been listed on the “National Priorities” list under
CERCLA or any comparable listing or otherwise has been designated as a facility that is
subject to an existing or, to the Knowledge of any Seller, threatened claim under CERCLA or
any similar state Law; and (3) none of the Assets is subject to any Lien arising under
Environmental Laws.

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     (viii) To the Knowledge of any Seller, none of the off-site locations where Hazardous
Materials from any of the Assets have been stored, treated, recycled, disposed of, or
Released is subject to any investigation or remedial obligation or other corrective action
requirement under Environmental Laws.

     (ix) Sellers have provided Buyer with copies of all material environmental studies,
audits, and assessments prepared by or in the possession of Sellers with respect to any of
the Assets.

     (x) This §4(m) contains the sole and exclusive representations and warranties of
Sellers with respect to any environmental matters, including any arising under any
Environmental Laws.

     (n) Insurance. §4(n) of the Disclosure Schedule sets forth: (1) all insurance
policies of Sellers (including the amounts and types of coverage) in connection with or with
respect to the Assets and/or the Gathering System; (2) each material claim under any insurance
policy made by or on behalf of each Seller with respect to the Assets and/or the Gathering System
during the past three years, which claim was denied by the insurer; and (3) each application for
insurance coverage made by or on behalf of each Seller with respect to the Assets and/or the
Gathering System during the last three years that was rejected by the proposed insurer. All such
insurance policies are in full force and effect and all premiums due and payable on such policies
have been paid. No notice of cancellation of or indication of an intention not to renew any such
insurance policy has been received by Sellers other than in the Ordinary Course of Business. Each
Seller represents that all claims, or events that could reasonably be expected to give rise to a
claim, have been reported to existing insurance carriers in accordance with policy requirements.

     (o) Governmental Regulation. No Seller is subject to regulation under the Public
Utility Holding Company Act of 1935, the Federal Power Act, the Interstate Commerce Act, the
Natural Gas Act, the Investment Company Act of 1940 or any state public utilities Laws.

     (p) Disclosure and Due Diligence. To the Knowledge of Sellers:

     (i) all materials disclosed to Buyer by Sellers and Sellers’ responses provided to
Buyer’s due diligence information and data requests are true, accurate and complete and are
the result of a thorough review and investigation by Sellers; and

     (ii) prior to the execution of this Agreement, Sellers have delivered to Buyer true and
complete copies of the contractual Assets, and all security Contracts and other instruments
creating or imposing any security interest encumbrance or adverse claim on the Assets, and
any other documents or instruments identified or referred to in the Disclosure Schedule.
Such delivery will not alone constitute adequate disclosure of those facts required to be
disclosed in any section of the Disclosure Schedule, and notice of their contents (other
than by express reference on the Disclosure Schedule) will in no way limit Sellers’ other
obligations or Buyer’s other rights under this Agreement.

     (q) Taxes. With respect to the Assets and the Gathering System: (1) each Seller has
timely filed all material Tax Returns required to be filed on or before the Effective Date; (2)
each Seller has timely paid all material Taxes that are due and payable (whether or not shown, or

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required to be shown, on such Tax Returns) on or before the Effective Date; (3) each Seller
has withheld and timely paid all Taxes required to have been withheld and paid in connection with
amounts paid or owing to any employee, independent contractor, creditor, stockholder or other Third
Person; (4) all Tax Returns filed by each Seller were complete and correct in all material
respects, and such Tax Returns correctly reflected the material facts regarding the income,
business, assets, operations, activities, status and other matters of each Seller and any other
information required to be shown thereon; (5) no such Tax Returns are currently the subject of an
audit by a Governmental Authority; (6) there are no Liens for Taxes upon any of the Assets, other
than Liens for Taxes not yet due and payable and for which there are adequate reserves; (7) Sellers
have not received written notice from a taxing authority in a jurisdiction where such entity does
not file Tax Returns that such entity is subject to Tax in that jurisdiction; and (8) Buyer is not
assuming an obligation to make a payment to an employee that will not be deductible under Section
280G of the Code.

     (r) No Other Agreements to Sell Assets. Neither Seller, their Affiliates nor any of
their respective officers, directors, shareholders or members have any commitment or legal
obligation, absolute or contingent, to any Person other than Buyer to sell, assign, transfer or
effect a sale of any of the Assets, to sell or effect a sale of any of the capital stock,
membership interests or partnership interests, as the case may be, of any Seller or any of their
Affiliates or to effect any merger, consolidation, liquidation, dissolution or other reorganization
of any Seller or any of its Affiliates and no Seller, its Affiliates or any of their respective
officers, directors, shareholders or members has engaged in any discussions with any Person
regarding any of the foregoing.

     (s) Disclaimer of Other Representations and Warranties. EXCEPT AS SPECIFICALLY SET
FORTH IN THIS AGREEMENT OR IN ANY TRANSACTION DOCUMENT, BUYER ACKNOWLEDGES AND AGREES THAT EACH
SELLER (AND LEG) HAS NOT MADE, DOES NOT MAKE, AND EXPRESSLY DISCLAIMS ANY WARRANTIES,
REPRESENTATIONS, COVENANTS, OR GUARANTEES, EITHER EXPRESS OR IMPLIED, WHETHER ARISING BY OPERATION
OF LAW OR OTHERWISE, AS TO THE MERCHANTABILITY, HABITABILITY, QUANTITY, QUALITY, OR PHYSICAL
CONDITION OF THE ASSETS OR THEIR SUITABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE. BUYER
AFFIRMS THAT: (1) IT HAS INVESTIGATED AND INSPECTED THE ASSETS AND IS FAMILIAR AND SATISFIED WITH
THEIR PHYSICAL CONDITION; AND (2) HAS MADE ITS OWN DETERMINATION AS TO THE: (A) MERCHANTABILITY,
HABITABILITY, QUANTITY, QUALITY AND PHYSICAL CONDITION OF THE ASSETS, AND (B) THE ASSETS’
SUITABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE. BUYER HEREBY ACCEPTS THE ASSETS IN THEIR
PRESENT PHYSICAL CONDITION ON AN “AS IS”, “WHERE IS” BASIS, AND “WITH ALL FAULTS AND DEFECTS”,
REGARDLESS OF HOW SUCH FAULTS AND DEFECTS WERE CAUSED OR CREATED (BY ANY SELLER’S OR LEG’S
NEGLIGENCE, ACTIONS, OMISSIONS, OR FAULT, OR OTHERWISE), AND ACKNOWLEDGES THAT: (I) WITHOUT THIS
ACCEPTANCE, THIS SALE WOULD NOT BE MADE, AND (II) SELLERS AND LEG SHALL NOT BE UNDER ANY OBLIGATION
WHATSOEVER TO UNDERTAKE ANY REPAIR, ALTERATION, REMEDIATION, OR OTHER WORK OF ANY KIND WITH RESPECT
TO ANY OF THE ASSETS.

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     SUBJECT TO BUYER’S RIGHTS UNDER: (1) THE OTHER PROVISIONS IN THIS AGREEMENT; AND (2) THE
APPLICABLE TRANSACTION DOCUMENTS, EACH SELLER AND LEG ARE HEREBY EXPRESSLY RELEASED BY BUYER AND
ITS SUCCESSORS AND ASSIGNS FROM ANY AND ALL RESPONSIBILITY, LIABILITY, OBLIGATIONS, AND CLAIMS,
KNOWN AND UNKNOWN, WHETHER BASED UPON NEGLIGENCE, STRICT LIABILITY OR OTHERWISE, ARISING UNDER
APPLICABLE LAWS, INCLUDING ANY OBLIGATIONS TO TAKE THE ASSETS BACK OR REDUCE THE BASE PURCHASE
PRICE, OR ANY ACTIONS FOR CONTRIBUTION OR INDEMNITY, THAT BUYER OR ITS SUCCESSORS OR ASSIGNS MAY
HAVE AGAINST ANY SELLER OR LEG OR THAT MAY ARISE IN THE FUTURE, ARISING FROM THE PHYSICAL CONDITION
OF THE ASSETS OR RESULTING FROM OPERATION OF THE ASSETS, REGARDLESS OF HOW CAUSED OR CREATED (BY
ANY SELLER’S OR LEG’S NEGLIGENCE, ACTIONS, OMISSIONS, OR FAULT, PURSUANT TO ANY STATUTORY SCHEME OF
STRICT LIABILITY, OR OTHERWISE. BUYER FURTHER ACKNOWLEDGES THAT THE PROVISIONS OF THIS SECTION
HAVE BEEN FULLY EXPLAINED TO BUYER AND THAT IT FULLY UNDERSTANDS AND ACCEPTS THE SAME AS A
CONDITION TO PROCEEDING WITH THIS TRANSACTION. BUYER ACKNOWLEDGES THAT EXCEPT AS OTHERWISE
PROVIDED IN THIS AGREEMENT OR IN ANY OTHER TRANSACTION DOCUMENT, NONE OF ANY SELLER’S OR LEG’S
EMPLOYEES, AGENTS, OR REPRESENTATIVES HAS MADE ANY STATEMENTS OR REPRESENTATIONS CONTRARY TO THE
PROVISIONS OF THIS SECTION.

     EXCEPT AS SPECIFICALLY STATED HEREIN OR IN ANY TRANSACTION DOCUMENT, EACH OF THE SELLERS AND
LEG MAKES NO WARRANTY OR REPRESENTATION, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, AS TO THE
ACCURACY OR COMPLETENESS OF ANY TITLE OPINION, DATA, REPORTS, RECORDS, PROJECTIONS, INFORMATION, OR
MATERIALS NOW, HERETOFORE, OR HEREAFTER FURNISHED OR MADE AVAILABLE TO BUYER IN CONNECTION WITH THE
ASSETS, INCLUDING, WITHOUT LIMITATION, ANY DESCRIPTION OF THE ASSETS, THE PRICING ASSUMPTIONS, THE
PHYSICAL CONDITION OF THE ASSETS, ANY OTHER MATTERS CONTAINED IN THE DATA, OR ANY OTHER MATERIALS
FURNISHED OR MADE AVAILABLE TO BUYER BY ANY SELLER OR LEG, OR BY EACH SELLER’S OR LEG’S
REPRESENTATIVES. IN ENTERING INTO AND PERFORMING THIS AGREEMENT, BUYER HAS RELIED, AND WILL RELY,
IN ADDITION TO SELLER’S AND LEG’S REPRESENTATIONS AND WARRANTIES IN THIS AGREEMENT AND IN THE
APPLICABLE TRANSACTION DOCUMENTS, ON BUYER’S INDEPENDENT INVESTIGATION OF, AND JUDGMENT WITH
RESPECT TO, THE ASSETS AND THEIR VALUE.

     EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT OR IN THE TRANSACTION DOCUMENTS, SELLERS MAKE
NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AT LAW OR IN EQUITY, IN RESPECT OF ITSELF, OR
ANY OF ITS ASSETS, LIABILITIES OR OPERATIONS, INCLUDING, WITH RESPECT TO THE CONDITION, USEFULNESS
OR ADEQUACY OF THE ASSETS, QUALITY, MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE,
MARKETABILITY, OR CONFORMITY TO SAMPLES.

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     (t) Sellers’ Private Placement Representations. With respect to the Enterprise Units
that Cerrito is to receive under this Agreement, Cerrito represents and warrants, as follows:

     (i) it is an Accredited Investor;

     (ii) it has such knowledge and experience in financial and business matters that it is
capable of evaluating the merits and risks of the Enterprise Units, and is able to bear the
economic risk of such investment for an indefinite period of time. It has been furnished
access to such information and documents as it has requested and has been afforded an
opportunity to ask questions of and receive answers from Representatives of Buyer concerning
the terms and conditions of the issuance of the Enterprise Units contemplated hereby;

     (iii) it is acquiring the Enterprise Units issued pursuant to this Agreement for its
own account for investment and not with a view towards the resale, transfer, or distribution
thereof, nor with any present intention of distributing such Enterprise Units;

     (iv) it is not acquiring the Enterprise Units as a result of any advertisement,
article, notice or other communication regarding the Enterprise Units published in any
newspaper, magazine or similar media or broadcast over television or radio or presented at
any seminar or any other general solicitation or general advertisement; and

     (v) it understands the Enterprise Units have not been registered under the Securities
Act, or any state securities Laws, and that the transferability of the Enterprise Units that
it is to receive under this Agreement will be restricted under the Securities Act unless
such shares are registered under the Securities Act or an exemption from such registration
is available.

     (u) Relationships with Related Persons. Except as disclosed in §4(u) of the
Disclosure Schedule, no Related Person of any Seller has, or since January 1, 2004 has had, any
interest in any property (whether real, personal or mixed and whether tangible or intangible) used
in or pertaining to the Gathering System. No Related Person of any Seller owns, or since January
1, 2004 has owned, of record or as a beneficial owner, an equity interest or any other financial or
profit interest in any Person that has: (1) had business dealings or a material financial interest
in any transaction with such Seller relating to the Gathering System other than business dealings
or transactions disclosed in §4(u) of the Disclosure Schedule, each of which has been conducted in
the Ordinary Course of Business with such Seller at substantially prevailing market prices and on
substantially prevailing market terms; or (2) engaged in competition with the Gathering System (a
“Competing Business”) in any market presently served by the Gathering System, except for
ownership of less than 1% of the outstanding capital stock of any Competing Business that is
publicly traded on any recognized exchange or in the over-the-counter market. Except as set forth
in §4(u) of the Disclosure Schedule, no Related Person of any Seller is a party to any of the
Gathering System Contracts or other contractual Assets, or has any claim or right against, any of
the Assets.

     (v) Conveyance Documents. Sellers’ deliveries under §2(k)(i)(A) through §2(k)(i)(H)
constitute all the documents and instruments necessary to vest in Buyer at Closing all

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of Sellers’ right, title and interest in, to and under the Assets, free and clear of all Liens
(other than Permitted Encumbrances).

     (w) No Undisclosed Material Liabilities. To the Knowledge of the Sellers, there are
no Liabilities attributable to or affecting the Gathering System or the Assets, and there is no
existing condition, situation or set of circumstances that could reasonably be expected to result
in such a Liability, other than Liabilities incurred in the Ordinary Course of Business (none of
which results from, arises out of, relates to, is the nature of, or was caused by any Breach of
Contract, Breach of warranty, tort, infringement or violation of Law), that are not (singly or in
the aggregate) material to the Assets or the Gathering System.

     (x) Other Information. To the Knowledge of the Sellers, none of the documents or
information delivered to Buyer by any Representative of any Seller or LEG in connection with the
Contemplated Transactions contains any untrue statement of a material fact or omits to state a
material fact necessary in order to make the statements contained therein not misleading. Neither
the representations and warranties of any Seller or LEG, nor the indemnification obligations of any
Seller or LEG, is affected, qualified, modified or deemed waived by reason of the fact that Buyer
knew or should have known that any representation or warranty of any Seller or LEG is or might be
inaccurate in any respect.

     (y) Indebtedness. §1(b) of the Disclosure Schedule lists all Indebtedness.

§5. Labor and Employment; Employee Benefits

     (a) Affected Employees. To the extent permitted by applicable Laws, Sellers have
provided to Buyer and its Affiliates a list of the Affected Employees, including each Affected
Employee’s name, job title, and work location, and the additional information regarding each
Affected Employee listed on §5(a) of the Disclosure Schedule.

     (b) Employment of Affected Employees by Buyer.

     (i) Neither Buyer nor its Affiliates are obligated to hire any Affected Employee but
will have interviewed all Affected Employees it chooses to interview, including the
employees listed in §5(b)(i) of the Disclosure Schedule (the “Identified Employees”)
within ten days after the Closing Date. Seller has granted prior to Closing and shall after
Closing grant to Buyer, to the extent permitted by applicable Laws, reasonable access to
Sellers’ field offices and personnel records of Sellers for the purpose of preparing for and
conducting employment interviews with all Identified Employees.

     (ii) Buyer and its Affiliates will determine which of the Identified Employees will be
offered employment by Buyer’s Affiliate and hired by Buyer’s Affiliate after their
acceptance of such employment offers and their passing Buyer’s Affiliate’s standard
pre-employment screening procedures (“Transferred Employees”). Buyer’s Affiliate
will have the right to offer employment to any or all Identified Employees. Buyer’s
Affiliate will extend all offers of employment, if any, to Identified Employees no later
than ten days after the Closing Date. Sellers will not, directly or indirectly, interfere
with any of Buyer’s Affiliate’s offers of employment to Identified Employees, make a
competing offer of employment to any Identified Employees, or recommend or suggest that any

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Identified Employees decline Buyer’s Affiliate’s offer of employment. Sellers, in
their sole discretion, may retain any Identified Employees who are not offered employment by
Buyer’s Affiliate or who, without any interference by Sellers, decline Buyer’s Affiliate’s
offer of employment. Buyer and Buyer’s Affiliates will have no responsibility or liability
with respect to any Affected Employees except the Transferred Employees, and then only after
the Transfer Date.

     (iii) Buyer’s Affiliate’s offers of employment to any Identified Employees shall be for
employment to begin on the first day of the second month immediately following the Closing
Date (the “Transfer Date”). Sellers shall retain and employ all Affected Employees
to whom Buyer’s Affiliate has given an offer of employment until the Transfer Date. Sellers
shall terminate the employment of all Transferred Employees effective as of 12:01 a.m.
Central time on the Transfer Date. Buyer agrees to reimburse Sellers for Sellers’ cost of
both the compensation and benefits Sellers paid or provided to all Transferred Employees
between the Closing Date and the Transfer Date as provided in §6(d). Sellers shall
reasonably cooperate with Buyer’s Affiliate in Buyer’s Affiliate’s efforts to offer
employment to, and conduct pre-employment background checks and other screening procedures
of, Identified Employees so that all such pre-employment screenings may be completed by the
Transfer Date.

     (iv) Neither Sellers nor their Related Persons shall solicit the employment of any
Transferred Employee for a period of at least 12 months after the Transfer Date.

     (v) It is understood and agreed that: (1) Buyer’s Affiliate’s expressed intention to
extend offers of employment as set forth in this section does not constitute any commitment,
Contract or understanding (expressed or implied) of any obligation on the part of Buyer or
Buyer’s Affiliates to an employment relationship of any fixed term or duration or upon any
terms or conditions other than those that Buyer or Buyer’s Affiliates may establish pursuant
to individual offers of employment to Affected Employees; and (2) employment offered by
Buyer’s Affiliate is “at will” and may be terminated by Buyer’s Affiliate or by a
Transferred Employee at any time for any reason (subject to any written commitments to the
contrary made by Buyer, Buyer’s Affiliates, the Transferred Employee, and applicable Laws).
Nothing in this Agreement shall be deemed to prevent or restrict in any way the right of
Buyer’s Affiliate to terminate, reassign, promote, or demote any of the Transferred
Employees after the Transfer Date or to change adversely or favorably the title, powers,
duties, responsibilities, functions, locations, salaries, other compensation or terms or
conditions of employment of such employees.

     (c) Salaries and Benefits.

     (i) Sellers shall, within its normal course of business, but not later than 15 days
after the Transfer Date, pay all wages and other remuneration due to Transferred Employees
with respect to their services as employees of Sellers through the close of business on the
day before the Transfer Date, including pro rata bonus payments and all vacation pay earned
and vested prior to the Transfer Date. In addition, Sellers shall pay any benefits due to
Affected Employees under any Employee Plan (or required by law or contract), including any
termination or severance payments due to the Affected

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Employees, in accordance with the terms of the applicable Employee Plan (or the
applicable law or contract, as the case may be).

     (ii) Sellers shall be liable for, and indemnify Buyer and Buyer’s Affiliates for, any
liability arising in connection with Seller’s obligation for payment hereunder of any salary
or remuneration due to Affected Employees by Sellers and any claims under Employee Plans
that were made or incurred by Affected Employees through the Transfer Date. For purposes of
this §5, a claim will be deemed incurred, in the case of hospital, medical or dental
benefits, when the services that are the subject of the claim are performed and, in the case
of other benefits (such as disability or life insurance), when an event has occurred or when
a condition has been diagnosed that entitles the employee to the benefit.

     (iii) Each Seller shall provide a copy of the most recent determination letter from the
Internal Revenue Service for each Employee Plan that is intended to be qualified under
Section 401(a) of the Code, and shall cause each Transferred Employee to become 100% vested
in his or her accrued benefits under such plan that is intended to be qualified under
Section 401(a) of the Code.

     (iv) §5(c)(iv) of the Disclosure Schedule contains a complete list of all Employee
Plans covering the Affected Employees. Each Seller shall have sole Liability and
responsibility for all matters arising out of any Affected Employee’s employment with that
Seller, including, all accrued but untaken vacation/paid time off or carry-overs of
vacation/paid time off from previous years and claims accruing under any Employee Plans, and
Buyer and Buyer’s Affiliates shall have no Liability for the same or for any matters
relating to that Seller’s employment of any Affected Employees, including offering
continuation health coverage as described in Section 4980B of the Code to any eligible
Affected Employee and his or her eligible dependents.

     (v) Each Seller shall furnish to Buyer a summary of the material terms of each Employee
Plan of that Seller affecting the Transferred Employees, including the Seller’s vacation and
paid-time-off policy and a copy of the summary plan description for each Employee Plan for
which a summary plan description exists.

     (vi) Sellers shall not change any compensation or benefit levels for any Transferred
Employee between the Closing Date and the Transfer Date, except for any regularly scheduled
adjustment to compensation that has previously been disclosed in writing to Buyer prior to
Closing.

     (d) Sellers’ Group Health Plans. As of the Closing Date, Sellers shall be solely
responsible for providing COBRA continuation health coverage under Sellers’ group health plans: (1)
with respect to each individual who is a “qualified beneficiary”, as such term is defined under
COBRA, on and before the Transfer Date and each individual who becomes a “qualified beneficiary” in
connection with the purchase described herein; and (2) who was (or, with respect to eligible
dependents, whose qualifying event occurred in connection with) an Affected Employee whose last
employment prior to the “qualifying event”, as such term is defined under COBRA, was associated
with the purchased assets (the “Qualified Beneficiaries”),

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including providing the appropriate COBRA notices and making available any coverage required
under COBRA with respect to such individuals. For the period of COBRA continuation coverage
provided under the Sellers’ group health plan, Buyer will assist Sellers or Sellers’ group health
plans with obtaining the last known address of such individuals as may be required to administer
continuation coverage in accordance with COBRA and its regulations and to otherwise comply with
applicable Laws. Any group health plan maintained by Buyer shall permit immediate participation by
Transferred Employees as of the Transfer Date without any exclusions or limitations for preexisting
conditions if permitted by the plan document or insurance contract governing Buyer’s group health
plans. For the period of COBRA continuation coverage required to be provided under the Sellers’
group health plan, the Qualified Beneficiaries will remain responsible for payment of the amount of
premiums that they would otherwise have been required to pay under the applicable group health plan
if they were still employed by Sellers, plus any additional premium permitted under COBRA and
imposed for the cost of continuation coverage for Qualified Beneficiaries under Sellers’ group
health plans. Sellers shall not be obligated to pay or reimburse any health care claims incurred
by Qualified Beneficiaries after the date on which COBRA continuation coverage ends.

     (e) Sellers’ Retirement and Savings Plans. All Transferred Employees who are
participants in Sellers’ retirement plans shall retain their accrued benefits under the applicable
Seller’s retirement plans as of the Transfer Date, and Sellers (or Sellers’ retirement plans) shall
retain sole Liability for the payment of such benefits as and when such Transferred Employees
become eligible therefor under the terms of such plans. Sellers shall cause the assets of each
such Employee Plan attributable to the accrued benefits of Transferred Employees to equal or exceed
the benefit Liabilities of such Employee Plan with respect to such Transferred Employees on a
plan-termination basis as of the Transfer Date.

     (f) General Employee Provisions.

     (i) Sellers and Buyer or Buyer’s Affiliates shall give any notices required by
applicable Laws and take whatever other actions with respect to the plans, programs and
policies described in this §5 as may be necessary to carry out the arrangements described in
this §5.

     (ii) Sellers shall provide Buyer and Buyer’s Affiliates with such plan documents,
employee data or other information as may be reasonably required to carry out the
arrangements described in this §5.

     (iii) Sellers shall provide Buyer’s Affiliate with completed I-9 forms of Sellers and
attachments with respect to all Transferred Employees, except for such employees as the
Seller Representative certifies in writing to Buyer’s Affiliate are exempt from such
requirement.

     (iv) Sellers agree that Buyer and Buyer’s Affiliate shall not have any Liability,
whether to Sellers, Affected Employees, former employees, their dependents, beneficiaries or
to any other Person, with respect to any Employee Plan maintained by Sellers.

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     (v) Sellers shall copy and transfer to Buyer’s Affiliates all books, records and
personnel files relating to the Transferred Employees, including copies of drug tests and
background checks, no later than 15 Business Days before the Transfer Date. Sellers and
Buyer shall cooperate to obtain a release of records satisfactory to Sellers from each
Transferred Employee.

§6. Post-Closing Covenants

     The Parties agree as follows with respect to the period following Closing:

     (a) General. In case at any time after Closing any further action is necessary or
desirable to carry out the purposes of this Agreement, each of the Parties will take such further
action (including the execution and delivery of such further instruments and documents) as the
other Party reasonably may request, all at the sole cost and expense of the requesting Party
(unless the request is made pursuant to §2(f), or the requesting Party is entitled to
indemnification under §7(a)).

     (b) Payment of Obligations Under Lehman Agreement. At Closing, Cerrito shall pay and
discharge all amounts owed at Closing by Cerrito to Lehman Brothers, Inc. (“Lehman”)
pursuant to that Letter Agreement, dated March 21, 2006 between Lehman and Cerrito.

     (c) Preferential Right to Purchase. From and after Closing, if Buyer desires to sell
all or substantially all the Assets to any Person other than an Affiliate in a single transaction
or a series of related transactions in which the Assets comprise more than 50% of the aggregate
value of such transaction or transactions, then Buyer shall promptly give written notice to Sellers
with full information concerning its proposed disposition, which shall include the name and address
of the prospective transferee (who must be ready, willing, and able to purchase), the purchase
price and all other terms of the offer. Sellers shall have an optional prior right, for a period
of 60 days after notice is delivered, to purchase for the same consideration on the same terms and
conditions the Asset or Assets Buyer proposes to sell.

     (d) Transition Services. In order to facilitate the full transition of operating
activities and functions in the Assets following the Closing Date, for a period of 120 days
commencing on the Closing Date, Sellers shall provide or cause to be provided to Buyer field
operating and administrative support services of the same or substantially similar nature that
Sellers or their Affiliates have provided with respect to the Gathering System (“Transition
Services”). Sellers will continue to provide Transition Services following the last day of
that 120-day period, on a month-to-month basis until Sellers provide written notice of their intent
to terminate the Transition Services at the end of any month after the initial 120-day term, upon
no less than 60 days prior written notice. Buyer may terminate any of the Transition Services at
any time upon 30 days written notice to the Seller Representative. Sellers shall perform or cause
to be performed the Transition Services in accordance with the Service Standard. Buyer, upon not
less than ten days’ written Notice from Buyer to the Seller Representative, at any time and from
time to time may, as of the date set forth in that notice (which may not precede the end of such
ten-day period without Sellers’ approval), terminate any or all of the Transition Services. Buyer
shall reimburse Sellers for the Direct Costs of the Transition Services provided in accordance with
this §6(d) and with the Service Standard and billed as a Direct Cost. No later than the tenth

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Business Day of each calendar month, beginning with the calendar month immediately following
Closing, Sellers will submit an invoice to Buyer for the Direct Costs incurred during the prior
calendar month which invoice shall include reasonable supporting documentation such as the nature
and amount of Direct Costs and the Transition Services to which they are attributable. If the
Closing Date is on a day other than the last day of a month, the invoice shall be only for those
Transition Services provided from such date until the end of the month in which Closing took place.
Buyer shall pay the undisputed portion of each invoice within 30 days after its receipt. Records
shall be maintained by Sellers for a period of two years after the final invoice for Transition
Services is paid by Buyer. Upon reasonable prior notice of not less than five Business Days, Buyer
and its Representatives shall have the right to audit and inspect, at Buyer’s expense, records
applicable to the Transition Services and invoices during normal business hours at LEG’s offices
for a period of two years following the date an invoice is delivered to Buyer. Except as
specifically provided in this Agreement, Sellers will not be liable to Buyer for any Adverse
Consequences arising from their provision of the Transition Services under this Agreement. Sellers
shall indemnify Buyer and its Affiliates from and against any and all Adverse Consequences arising
out of or relating to any gross negligence, fraud, willful misconduct, or bad faith in their
performance of the Transition Services.

     (e) Post-Closing Settlement of Income and Expenses Received or Paid. After Closing:
(1) Buyer shall remit to the appropriate Seller any revenues or income received by Buyer which are
attributable to the Assets prior to the Effective Time, including accounts receivable attributable
to the sale and transportation of natural gas and natural gas condensate during periods prior to
the Effective Time; (2) Sellers shall remit to Buyer any revenues or income that are attributable
to the Assets after the Effective Time, including proceeds from the sale and transportation of
natural gas and natural gas condensate for periods following the Effective Time; (3) Buyer shall
pay to any Seller, after receipt of such Seller’s invoice, any accounts payable and expenses paid
by such Seller and incurred in the Ordinary Course of Business or in response to an emergency which
are attributable to ownership and operation of the Assets after the Effective Time; and (4) the
appropriate Seller shall pay to Buyer, after receipt of Buyer’s invoice, any accounts payable or
expenses paid by Buyer which are attributable to the ownership and operation of the Assets before
the Effective Time.

     (f) Shelf Registration Rights.

     (i) Shelf Registration Rights. Buyer shall, at its cost, prepare and file with
the Securities and Exchange Commission (the “Commission”), as promptly as
practicable (but in no event more than 30 days after Closing), a registration statement on
Form S-3 (or such other appropriate form) that covers all of the Enterprise Units that
Cerrito received as part of the Final Purchase Price (and any Enterprise Units received as a
result of any split, dividend distribution or similar transaction) (the “Registrable
Securities”) to be offered on a delayed or continuous basis pursuant to Rule 415 under
the Securities Act (the “Shelf Registration Statement”). Buyer shall use its
commercially reasonable efforts to have the Shelf Registration Statement declared effective
within 180 days after Closing. After the Shelf Registration Statement is declared
effective, Buyer shall use its commercially reasonable efforts to keep the Shelf
Registration Statement continuously effective in order to permit the prospectus included
therein to be lawfully delivered by Cerrito or its Lawful Assigns, (each such Person, if
included in the Shelf Registration

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Statement shall be referred to herein as a “Registered Seller” and collectively the
“Registered Sellers”) and shall prepare and file with the Commission such amendments
and supplements to the Shelf Registration Statement and the prospectus contained therein and
to take any other action as may be necessary to keep such Shelf Registration Statement
effective until the earlier of: (1) the date that all of the Registrable Securities have
been sold; or (2) the date on which the remaining Registrable Securities are eligible for
resale pursuant to Rule 144 under the Securities Act without restriction. Each Registered
Seller shall notify Buyer at such time as such Registered Seller has sold or otherwise
disposed of all of its Registrable Securities. Buyer agrees to amend or supplement the
Shelf Registration Statement and the prospectus included therein to include as a selling
shareholder any Lawful Assigns that notifies Buyer that it has received Registrable
Securities prior to the expiration of this §6(f). Notwithstanding any other provisions of
this Agreement to the contrary, Buyer shall cause the Shelf Registration Statement and the
prospectus and any amendment or supplement thereto, as of the effective date of the Shelf
Registration Statement, amendment or supplement, (a) to comply in all material respects with
the applicable requirements of the Securities Act and the rules and regulations of the
Commission and (b) not to contain any untrue statement of a material fact or omit to state a
material fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they were made, not misleading; provided,
however, that each Registered Seller shall be solely responsible for information regarding
such Registered Seller as furnished to Buyer in writing specifically for use in the Shelf
Registration Statement or any supplement or amendment thereto.

     (ii) Blackout Period for Shelf Registration Statement. If Buyer: (1) is in
possession of material nonpublic information that it deems advisable not to disclose; (2) is
engaged in active negotiations or planning for a merger or acquisition or disposition
transaction; (3) determines that Form S-3 is not available; (4) determines that an amendment
or supplement to the Shelf Registration Statement is necessary; or (5) determines that it
would not be in the best interests of Buyer for the Registrable Securities to be sold
because such sale would materially interfere with Buyer’s business or financing plans, Buyer
may deliver written notice to the Registered Sellers to the effect that such Registered
Sellers may not make offers or sales under the Shelf Registration Statement for a period not
to exceed 60 days from the date of each such notice; provided, however, that the aggregate
number of days Buyer may suspend the use of the Shelf Registration Statement hereunder shall
not exceed 120 days during any 12-month period.

     (iii) Shelf Registration Notice. Each Registered Seller shall deliver a
written notice to Buyer (the “Shelf Registration Notice”) that it intends to make
offers or sales under the Shelf Registration Statement prior to any such offer or sale.
Such Shelf Registration Notice shall include the number of Enterprise Units to be sold by
such Registered Seller, and such Registered Seller’s address, facsimile and e-mail address,
written notice to which shall constitute notice to such Registered Seller for the purposes
of this §6. If Buyer determines that it is necessary to amend or supplement the prospectus,
Buyer shall prepare and file or cause such amendment or supplement to be prepared and filed
with the Commission as soon as possible, and in no event later than ten Business Days after
receipt of the Shelf Registration Notice. In the event that an

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amendment or supplement is necessary and Buyer elects to exercise its right to blackout
such Registered Seller’s sales pursuant to §6(f)(ii) above, any such delay shall count for
purposes of the sixty (60) day limit described in §6(f)(ii) above. The Registered Sellers
may not offer or sell any Registrable Securities under the Shelf Registration Statement
until it has received from Buyer (i) confirmation that no amendment or supplement is needed
or (ii) copies of the prospectus, as amended or supplemented as the case may be, and has
received written notice from Buyer that the Shelf Registration Statement and any
post-effective amendments have become effective.

     (iv) Expenses. Buyer shall bear all expenses incurred in connection with the
registration under this §6(f) (excluding underwriter’s and broker’s discounts and
commissions and fees relating to the Registrable Securities and legal fees of counsel for
Sellers), including, all federal and “blue sky” registration, filing and qualification fees,
printer’s and accounting fees, and legal fees of counsel for Buyer.

     (v) Indemnification.

     (A) Buyer shall indemnify each Registered Seller and each Person controlling
(as defined in Section 15 of the Securities Act) such Registered Seller and each of
such controlling Person’s officers and directors, if any, and shall also indemnify
each underwriter, if any, and each Person who controls any underwriter, against all
claims, losses, damages and Liabilities (or actions in respect thereof) arising out
of or based on any of the following statements, omissions or violations (each, a
“Violation”):

     (1) any untrue statement (or alleged untrue statement) of a material fact
contained in the Shelf Registration Statement, including any preliminary prospectus
or final prospectus contained therein or any amendments or supplements thereto;

     (2) any omission (or alleged omission) to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading; or

     (3) any violation by Buyer of any rule or regulation promulgated under the
Securities Act applicable to Buyer and relating to action or inaction required of
Buyer in connection with the registration.

Buyer shall reimburse each Registered Seller and each Person controlling such
Registered Seller, and each of such controlling Person’s officers and directors, if
any, each such underwriter, and each Person who controls such underwriter, for any
legal and other expenses reasonably incurred in connection with investigating or
defending any such claim, loss, damage, Liability or action; provided, however, that
Buyer shall not be liable in any such case to the Registered Sellers or any
controlling Person to the extent that any such claim, loss, damage, Liability or
expense arises out of or is based upon a Violation which occurs in reliance upon
written information that a Registered Seller furnished to Buyer, where such

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information is specifically provided for use in the Shelf Registration Statement,
including any preliminary prospectus or final prospectus contained therein or in any
amendment or supplement thereto.

     (B) Each Registered Seller shall severally indemnify Buyer, each underwriter,
if any, of Buyer’s securities covered by the Shelf Registration Statement, each
Person who controls (as defined in Section 15 of the Securities Act) Buyer or such
underwriter, and each of such controlling Person’s officers and directors, if any,
against all claims, losses, damages and Liabilities (or actions in respect thereof)
arising out of or based on any Violation, and shall reimburse Buyer and any such
directors and officers, underwriters and control Persons for any legal or any other
expenses reasonably incurred in connection with investigating or defending any such
claim, loss, damage, Liability or action, in each case to the extent, but only to
the extent, that such Violation is made in the Shelf Registration Statement,
including any preliminary prospectus or final prospectus contained therein or any
amendment or supplement thereto, based upon and in conformity with written
information that the applicable Registered Seller furnished to Buyer specifically
for use therein; provided, however, that each Registered Seller’s obligations
hereunder will be limited to an amount equal to the proceeds received by such
Registered Seller in exchange for Registrable Securities sold pursuant to the
prospectus which contained such untrue statement, omission or violation and shall
relate solely to untrue statements, omissions and violations resulting from written
information provided by such Registered Seller.

     (C) In connection with any indemnity pursuant to §6(f), each indemnified party
shall give notice to the indemnifying party promptly after such indemnified party
has knowledge of any claim as to which indemnity may be sought and shall permit the
indemnifying party to assume the defense of any such claim or any litigation
resulting therefrom, provided that counsel for the indemnifying party, who shall
conduct the defense of such claim or any litigation resulting therefrom, shall be
approved by the indemnified party (whose approval shall not be unreasonably
withheld). Any such assumption of the defense and control of a claim will
constitute an acknowledgement and acceptance by the indemnifying party of its
obligation to indemnify the indemnified party claim under this §6(f). The
indemnified party may participate in such defense with counsel of its own choosing,
but the fees and expenses of such counsel shall be at such indemnified party’s
expense unless: (1) the indemnifying party and the indemnified party shall have
agreed to the retention of such counsel; or (2) the named parties to any such
proceeding (including any impleaded parties) include both the indemnifying party and
the indemnified party and representation of both parties by the same counsel would
be inappropriate due to actual or potential conflicting interests between them. The
failure of any indemnified party to give notice as provided herein shall relieve the
indemnifying party of its obligations under this §6(f) only if such failure is
prejudicial to the ability of the indemnifying party to defend such action, and such
failure shall in no event relieve the indemnifying party of any liability that it
may have to any indemnified party otherwise than under this §6(f). No indemnifying
party, in the defense of any

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such claim or litigation, shall, except with the Consent of each indemnified
party, Consent to entry of any judgment or enter into any settlement that does not
include as an unconditional term thereof the giving by the claimant or plaintiff to
such indemnified party of a release from all liability with respect to such claim or
proceeding.

     (g) Lock-up of Enterprise Units. Cerrito may not offer, sell, contract to sell,
pledge, or otherwise dispose of (or enter into any transaction which is designed to, or might
reasonably be expected to, result in the disposition of (whether by actual disposition or effective
economic disposition due to cash settlement or otherwise) by Sellers or any of their Affiliates),
directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease
a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934
with respect to, any Registrable Securities, or publicly announce an intention to effect any such
transaction, for a period of 90 days after the Closing Date (the “Lock-Up Period”);
provided, however, that Cerrito may make any private transfer to a Lawful Assign during the Lock-up
Period. After the expiration of the Lock-Up Period, Cerrito may not at any time sell in excess of
75,000 Registrable Securities in a single transaction, without Buyer’s prior written Consent, which
Buyer will not unreasonably withhold. Cerrito shall give Buyer written notice of such proposed
sale, transfer or assignment. Buyer shall have until 5:00 p.m. Central time on the second full
Business Day after receipt of such notice to provide Cerrito with its written Consent or notice
that it does not Consent to such sale or transfer. The failure of Buyer to respond in writing by
5:00 p.m. Central time on the second Business Day after receipt of notice shall be deemed to be
Consent to such sale, transfer or assignment for purposes of this §6(g). Notwithstanding the above
Lock-up Period, Cerrito shall have the right to sell, without the prior approval of Buyer, up to an
aggregate of Fifteen Million Dollars ($15,000,000) of Registrable Securities after the expiration
of the 30-day period immediately following the Closing Date (excluding any transfers to any Lawful
Assigns, but including any subsequent resales by such Lawful Assigns); provided, however, that
Cerrito may not exercise such right to sell during the 60 trading day period after the closing of
an offering by Buyer of any Enterprise Units. Notwithstanding any other provision of this
Agreement, any sale or transfer of Registrable Securities by Cerrito or any Lawful Assign (other
than to Buyer) shall be made pursuant to the Shelf Registration Statement, once declared effective,
or an exemption from registration under the Securities Act evidenced by an opinion of counsel
confirming the availability of such exemption. A “Lawful Assign” means any Person: (1) to
which Cerrito may transfer Registrable Securities in compliance with the registration requirements
of the Securities Act or an exemption therefrom as evidenced by an opinion of counsel; and (2) such
Person agrees in writing to be bound by the Lock-up provisions in §6(g) to the same extent as
Cerrito and the provisions in this §6 applicable to Registered Sellers, but only in the event that
(in the case of the Registered Sellers’ provisions) such Person will be a Registered Seller.

     (h) Financial Information. Within 90 days after Closing, Sellers will provide Buyer
with the following financial information: (1) audited combined financial statements of the Assets
consisting of balance sheets at December 31, 2005 and 2004 and income statements, cash flow
statements and equity statements for each of the years ended December 31, 2005, 2004 and 2003; and
(2) unaudited combined quarterly financial statements of the Assets consisting of balance sheets,
income statements, cash flow statements and equity statements for each of the quarters ending March
31, 2005, June 30, 2005, September 30, 2005, December 31, 2005, March

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31, 2006 and June 30, 2006. In addition, Sellers will provide Buyer a written summary of
significant changes in earnings of the Assets for the following periods (a) fiscal year 2005 versus
fiscal year 2004, (b) fiscal year 2004 versus fiscal year 2003, and (c) quarter-on-quarter variance
analysis beginning with the quarter ended March 31, 2005 and extending through the quarter ended
June 30, 2006. The audited financial statements referred to herein shall include such footnotes,
financial schedules and other information as to be fully compliant with Regulation S-X of the U.S.
Securities and Exchange Commission. The independent auditor selected to prepare the audited
financial statements shall be mutually agreed to by Sellers and Buyer and shall be qualified to
perform such work.

     (i) Customer and Other Business Relationships. For a period of six months after
Closing, LEG and Sellers will use their reasonable commercial efforts, without incurring any
out-of-pocket costs, to continue and maintain for the benefit of Buyer those business relationships
of Sellers existing prior to Closing and relating to the Gathering System, including relationships
with lessors, employees, regulatory authorities, licensors, customers, suppliers and others, and
Sellers will satisfy any Excluded Liabilities in a manner that is not detrimental to any of such
relationships. Sellers shall refer to Buyer all inquiries relating to the Gathering System. No
Seller nor any of its Related Persons will take any action that would tend to diminish the value of
the Assets after Closing or that would interfere with the Gathering System after Closing, including
disparaging the Buyer’s name or the Gathering System.

     (j) Certain Actions by Sellers. Promptly after Closing, Sellers shall undertake the
actions described in §6(j) of the Disclosure Schedule. Upon Sellers’ full completion of the
actions described in §6(j) of the Disclosure Schedule as determined by Buyer, Sellers will have no
further Liability to Buyer with respect to those actions.

     (k) VOC Site Assessment. Within 120 days of Closing, Buyer shall complete an
assessment of the VOC emissions of each site listed in §6(k) of the Disclosure Schedule, using
accepted industry and environmental practices for purposes of quantifying potential emissions based
on maximum design capacity of the facilities located on such sites. In the event Buyer determines
that any site has the potential to emit 25 tons or more of VOCs per year, Buyer shall retain One
Hundred Seventy Five Thousand Dollars ($175,000) of the VOC Holdback Amount for each such site and
such amounts shall not be part of the Final Purchase Price. In the event Buyer determines that any
site does not has the potential to emit 25 tons or more of VOCs per year, Buyer shall remit One
Hundred Seventy Five Thousand Dollars ($175,000) of the VOC Holdback Amount to Sellers for each
such site and such amounts shall become part of the Final Purchase Price.

     (l) Transfer of Interim Excluded Assets. Sellers shall transfer the Interim Excluded
Assets, except for the radios described in §1(c) of the Disclosure Schedule, to ESTG or another
Buyer Designee promptly after Buyer delivers written notice to the Seller Representative requesting
such transfer. Buyer shall determine whether such radios are compatible with Buyer’s operation of
the Gathering System. Sellers shall transfer to ESTG or another Buyer Designee up to 21 of such
radios that Buyer determines are compatible with Buyer’s operation of the Gathering System.

-46-

 

     (m) Radio Tower and Shared Data Agreement. Promptly after Closing, the Parties shall
cause their Affiliates to enter into a mutually acceptable agreement which allows: (1) Buyer and
Affiliates to use the radio tower facilities described in §6(m) of the Disclosure Schedule; and (2)
further provides that Cerrito and EGL shall provide, to Buyer’s gas control center, real time
pressure, flow and compressor data and, to Buyer’s gas measurement department, daily measurement
data including total volumes of gas, each with respect to the Gathering System and in electronic
format acceptable to Buyer.

     (n) Joint Use of Easements and Surface Sites. Promptly after Closing, the Parties
shall cause their Affiliates to enter into a mutually acceptable agreement providing for their
joint use of certain easements and surface leases, as described in §6(n) of the Disclosure
Schedule, for both the Gathering System and Sellers’ sour gas system, which is an Excluded Asset.

     (o) Joint Venture Agreement. Promptly after Closing, the Parties shall cause their
Affiliates to enter into a mutually acceptable agreement regarding the formation of a joint venture
to build certain gathering and compression assets in a mutually agreed area.

§7. Remedies for Breaches of This Agreement

     (a) Indemnification Provisions for Buyer’s Benefit. After Closing, subject to the
Claims Period and the limitations in this §7, LEG and the Sellers shall jointly and severally
indemnify the Buyer Indemnified Parties from and against any Buyer Adverse Consequences that arise
from:

     (i) any Breach of any of the representations or warranties (disregarding any
qualification exception contained in such representation or warranty relating to
materiality, Material Adverse Effect or Material Adverse Change and disregarding any matter
disclosed in §4(e)(i) of the Disclosure Schedule) of Sellers set forth in this Agreement or
in any certificate furnished or to be furnished by Sellers in accordance with this
Agreement;

     (ii) any Breach or default by any Seller of its covenants or agreements contained in
this Agreement;

     (iii) any fraud, willful misconduct or bad faith of any Seller in connection with this
Agreement, or any of the Contemplated Transactions;

     (iv) any Excluded Liabilities; and/or

     (v) any Excluded Assets.

     (b) Indemnification Provisions for Sellers’ Benefit. After Closing, subject to the
Claims Period and the limitations in this §7, Buyer shall indemnify the Seller Indemnified Parties
and LEG from and against any Adverse Consequences that arise from:

     (i) any Breach of any of the representations or warranties of Buyer set forth in this
Agreement or the exhibits and schedules hereto, in the Disclosure Schedules, or in any
certificate furnished or to be furnished by Buyer in accordance with this Agreement;

-47-

 

     (ii) any Breach or default by Buyer of its covenants or agreements contained in this
Agreement (other than a Breach of Buyer’s covenants in §6(f), which is subject to the
indemnity provisions in §6(f));

     (iii) any fraud, willful misconduct or bad faith of Buyer in connection with this
Agreement or any of the Contemplated Transactions; and/or

     (iv) Buyer’s failure to perform, discharge or satisfy the Assumed Liabilities.

     (c) Liabilities Non-Recourse to Buyer’s General Partner. Buyer’s Liabilities under
this Agreement and under the Transaction Documents to which it is a party are obligations of Buyer
only, not the general partner of Buyer. Sellers and LEG agree to limit any claims it may have
arising from or connected to this Agreement to Buyer and Buyer’s assets and each Seller waives and
releases any related right it may have to pursue or proceed against the general partner of Buyer
individually. Notwithstanding the preceding, Sellers may cause legal papers to be served upon any
partner of Buyer to the extent necessary and for the sole purpose of obtaining jurisdiction over
Buyer.

     (d) Claims Period. The Claims Periods under this Agreement will begin on the Closing
Date and terminate as follows:

     (i) with respect to Buyer Adverse Consequences arising: (1) under: §7(a)(i) with
respect to any Breach of any Indefinite Surviving Representations; or (2) with respect to
the Surviving Indemnification Obligations, the Claims Period will continue indefinitely;

     (ii) with respect to Seller Adverse Consequences arising by virtue of Buyer’s Breach
under: (1) §7(b)(i) with respect to §3(a) (Organization), §3(b) (Authorization of
Transaction), or §3(c) (Non-contravention); or (2) §7(b)(ii), §7(b)(iii) or §7(b)(iv), the
Claims Period will continue indefinitely, except as limited by Law (including any applicable
statutes of limitation); and

     (iii) with respect to all other Buyer Adverse Consequences or Seller Adverse
Consequences arising under this Agreement, the Claims Period will terminate on the date that
is two years after the Closing Date.

Notwithstanding the preceding, if, prior to the close of business on the last day of the applicable
Claims Period, an Indemnifying Party has been properly notified of a Claim for Indemnification and
that claim has not been finally resolved or disposed of at that date, that Claim for
Indemnification will continue to survive and will remain a basis for indemnification under this
Agreement until that claim is finally resolved or disposed of in accordance with the terms of this
Agreement.

     (e) Buyer Basket; Indemnification. The Buyer Indemnified Parties may not make a Claim
for Indemnification against Sellers or LEG unless and until the aggregate amount of those Buyer
Adverse Consequences exceeds Five Hundred Thousand Dollars ($500,000) (that amount, the
“Basket”), in which event the Buyer Indemnified Parties may claim indemnification for all
Buyer Adverse Consequences back to the first dollar. Additionally, the Seller Indemnified

-48-

 

Parties will have no obligation to indemnify any Buyer Indemnified Party for Buyer Adverse
Consequences or otherwise under this Agreement for any amount in excess of 10% of the Base Purchase
Price (the “Indemnification Cap”). Notwithstanding the preceding, none of the Indefinite
Surviving Representations or the Surviving Indemnification Obligations is subject to the Basket or
the Indemnification Cap.

     (f) Determination of Adverse Consequences. All indemnification payments under this §7
shall be paid by the Indemnifying Party without regard to any Tax benefits, insurance coverage, or
other indemnification rights that are available to the Indemnified Party, and shall be computed on
a present value basis (using the Applicable Rate as the discount rate). All indemnification
payments under this §7 shall be deemed adjustments to the Final Purchase Price.

     (g) Exclusive Remedy. THE PARTIES AND LEG ACKNOWLEDGE AND AGREE THAT, FROM AND AFTER
THE CLOSING DATE, THE INDEMNIFICATION PROVISIONS IN THIS AGREEMENT ARE THEIR EXCLUSIVE REMEDIES
WITH RESPECT TO THIS AGREEMENT, THE EVENTS GIVING RISE THERETO, AND THE CONTEMPLATED TRANSACTIONS.
EACH PARTY ACKNOWLEDGES THAT NEITHER IT, NOR ANY SUCCESSOR OR ASSIGN, HAS ANY RIGHTS AGAINST THE
OTHER PARTY OR ITS AFFILIATES WITH RESPECT TO THE CONTEMPLATED TRANSACTIONS PROVIDED OTHER THAN AS
EXPRESSLY PROVIDED IN THIS AGREEMENT OR IN THE TRANSACTION DOCUMENTS. NOTWITHSTANDING ANYTHING TO
THE CONTRARY IN THIS §7: IN THE EVENT OF A FRAUDULENT OR WILLFUL BREACH OF ANY REPRESENTATION,
WARRANTY, COVENANT, OR AGREEMENT CONTAINED HEREIN BY A PARTY, ANY INDEMNIFIED PARTY WILL HAVE ALL
REMEDIES AVAILABLE AT LAW OR IN EQUITY (INCLUDING FOR TORT) WITH RESPECT THERETO AND NOT SUBJECT TO
ANY LIMITS CONTAINED HEREIN OR IN ANY TRANSACTION DOCUMENT.

     (h) Investigations. The respective representations and warranties of the Parties
contained in this Agreement or in any certificate or other document delivered by any Party prior to
Closing and the rights to indemnification in this Agreement will not be deemed waived or otherwise
affected by any investigation made by a Party.

     (i) Limitation on Damages. NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THIS
AGREEMENT, IN NO EVENT WILL ANY PARTY OR LEG BE LIABLE TO THE OTHER (OR ANY AFFILIATE OR RELATED
PERSON) UNDER THIS AGREEMENT FOR ANY EXEMPLARY, PUNITIVE, REMOTE, SPECULATIVE, CONSEQUENTIAL,
SPECIAL, OR INCIDENTAL DAMAGES OR LOSS OF PROFITS (OTHER THAN PAYMENT OF SUCH DAMAGES ARISING BY
VIRTUE OF LIABILITY TO ANY THIRD PERSON OTHER THAN AN AFFILIATE OR RELATED PERSON HEREUNDER).

§8. Miscellaneous

     (a) No Third-Person Beneficiaries. This Agreement shall not confer any rights or
remedies upon any Person other than the Parties and their respective successors and permitted
assigns.

-49-

 

     (b) Disclosure Schedule.

     (i) The information in the Disclosure Schedule constitutes: (1) exceptions to
particular representations, warranties, covenants and obligations of Sellers as set forth in
this Agreement; or (2) descriptions or lists of Assets and Liabilities and other items
referred to in this Agreement. If there is any inconsistency between the statements in this
Agreement and those in the Disclosure Schedule (other than an exception expressly set forth
as such in the Disclosure Schedule with respect to a specifically identified representation
or warranty), the statements in this Agreement will control.

     (ii) The statements in the Disclosure Schedule, and those in any supplement thereto,
relate only to the provisions in the Section of this Agreement to which they expressly
relate and not to any other provision in this Agreement except as expressly cross-referenced
herein.

     (c) Entire Agreement. This Agreement, the Transaction Documents and the
Confidentiality Agreement constitute the entire agreement among the Parties and supersede any prior
understandings, agreements, or representations by or among the Parties, written or oral, to the
extent they relate in any way to the subject matter of this Agreement.

     (d) Succession and Assignment. This Agreement and the Transaction Documents shall be
binding upon and inure to the benefit of the Parties named in this Agreement and their respective
successors and permitted assigns. No Party may assign either this Agreement or any of its rights,
interests, or obligations under this Agreement without the prior written approval of the other
Party, except that Buyer may transfer or assign, in whole or from time to time in part, to one or
more of its Affiliates (including a Buyer Designee), this Agreement or any Transaction Document or
all or any part of its rights or obligations under this Agreement or any Transaction Document. A
reference to a Party to this Agreement or another agreement or document includes the Party’s
successors and assigns.

     (e) Counterparts. This Agreement may be executed in one or more counterparts
(including by means of facsimile), each of which shall be deemed an original but all of which
together will constitute one and the same instrument.

     (f) Headings. The section headings contained in this Agreement are inserted for
convenience only and shall not affect in any way the meaning or interpretation of this Agreement.

     (g) Notices. Each Party giving or making any notice, request, demand, Consent or
other communication (each, a “Notice”) pursuant to this Agreement shall give the Notice in
writing and use one of the following methods of delivery each of which for purposes of this
Agreement is a writing: (1) personal delivery; (2) registered or certified mail (in each case,
return receipt requested and postage prepaid); (3) nationally recognized overnight courier (with
all fees prepaid); or (4) facsimile. Any Party giving a Notice shall address the Notice to the
appropriate person at the receiving Party at:

-50-

 

	 	 	 
	If to any Seller:
	 
	 	 
	 

	 	Lewis Energy Group, L.P.
	 

	 	c/o Tercero Navarro, Inc.
	 

	 	10101 Reunion Place, Suite 1000
	 

	 	San Antonio, Texas 78216
	 

	 	Attn. Rodney R. Lewis
	 

	 	Facsimile: 210.308.6930
	 
	 	 
	With copies to:
	 
	 	 
	 

	 	Al Holcomb
	 

	 	10101 Reunion Place, Suite 1000
	 

	 	San Antonio, Texas 78216
	 
	 	 
	 

	 	Anthony Trevino, Jr.
	 

	 	Wilson, Trevino, Freed, Valls & Trevino, LLP
	 

	 	P.O. Box 420048
	 

	 	Laredo, Texas 78042-0048
	 

	 	Facsimile: 956.722.0647
	 
	 	 
	If to Buyer:
	 
	 	 
	 

	 	Enterprise Products Partners L.P.
	 

	 	Attention: President
	 

	 	1100 Louisiana, Suite 4000
	 

	 	Houston, Texas 77002
	 

	 	Facsimile: 713.381.7870
	 
	 	 
	with copies to:
	 
	 	 
	 

	 	Enterprise Products Partners L.P.
	 

	 	Attention: Legal Department
	 

	 	1100 Louisiana, Suite 4000
	 

	 	Houston, Texas 77002
	 

	 	Facsimile: 713.381.7870

Any Party may send any Notice, request, demand, claim, or other communication under this Agreement
to the intended recipient at the address set forth above using any other means (including personal
delivery, expedited courier, messenger service, telecopy, ordinary mail, or electronic mail), but
no such Notice, request, demand, claim, or other communication shall be deemed to have been duly
given unless and until it actually is received by the intended recipient. Any Party may change the
address to which Notices, requests, demands, claims, and other communications under this Agreement
are to be delivered by giving the other Parties Notice in the manner set forth in this Agreement.
Except as provided elsewhere in this Agreement, a Notice is effective only if the Party giving the
Notice has complied with this §8(g) and the receiving Party has received the Notice. A Notice is
deemed to have been received as follows:

-51-

 

     (i) if a Notice is delivered in person, or sent by registered or certified mail, or
national recognized overnight courier, upon receipt as indicated by the date on the signed
receipt;

     (ii) if a Notice is sent by facsimile, upon receipt by the Party giving or making the
Notice of an acknowledgment or transmission report generated by the machine from which the
facsimile was sent indicating that the facsimile was sent in its entirety to the recipient’s
facsimile number; or

     (iii) if the receiving Party rejects or otherwise refuses to accept the Notice, or if
the Notice cannot be delivered because of a change in address for which no Notice was given,
then upon the rejection, refusal or inability to deliver; and

     (iv) despite §8(g)(i) through §8(g)(iii), if any Notice is received after 5
p.m. on a Business Day where the recipient is located, or on a day that is not a
Business Day where the recipient is located, then the Notice is deemed received at 9:00 a.m.
on the next Business Day where the recipient is located.

     (h) Governing Law. This Agreement shall be governed by and construed in accordance
with the domestic Laws of the State of Texas without giving effect to any choice or conflict of Law
provision or rule (whether of the State of Texas or any other jurisdiction) that would cause the
application of the Laws of any jurisdiction other than the State of Texas.

     (i) Arbitration. Any dispute, controversy, or claim arising out of or relating to
this Agreement (a “Dispute”) shall be settled by binding arbitration in accordance with the
commercial arbitration rules of the American Arbitration Association. Any such Dispute shall be
arbitrated on an individual basis, and shall not be consolidated in any arbitration with any
dispute, claim, or controversy of any other Party. The arbitration shall be conducted in the
English language in San Antonio, Texas, and any court having jurisdiction thereof may immediately
issue judgment on the arbitration award. The Parties agree that the arbitration provided for in
this §8(i) shall be the exclusive means to resolve all Disputes and the arbitrator shall be
empowered to grant specific performance or other equitable remedies to a Party.

     (j) Amendments and Waivers. No amendment of any provision of this Agreement shall be
valid unless the same shall be in writing and signed by Buyer and the Seller Representative. No
waiver by any Party of any provision of this Agreement or any default, misrepresentation, or Breach
of warranty or covenant under this Agreement, whether intentional or not, shall be valid unless the
same shall be in writing and signed by the Party making such waiver, nor shall such waiver be
deemed to extend to any prior or subsequent default, misrepresentation, or Breach of warranty or
covenant under this Agreement or affect in any way any rights arising by virtue of any prior or
subsequent such occurrence.

     (k) Seller Representative. By signing this Agreement, Sellers hereby irrevocably
constitute and appoint Rodney R. Lewis as the true and lawful agent and attorney-in-fact (the
“Seller Representative”) with full powers of substitution to act in the name, place and
stead of Sellers with respect to the performance on behalf of Sellers under this Agreement, and to
do or refrain from doing all such further acts and things, and to execute all such documents, as
the

-52-

 

Seller Representative deems necessary or appropriate in connection with any of the
Contemplated Transactions, including to: (1) accept and give Notices under this Agreement on behalf
of any or all of the Sellers; (2) Consent to any modification or amendment of this Agreement; and
(3) give any waiver or Consent under this Agreement. Sellers Representative does hereby accept
such appointment. Buyer shall be entitled to rely exclusively upon such Notices, Consents,
amendments, modifications and other acts of the Seller Representative as being the binding acts of
the Sellers or any of them, and Buyer shall be entitled to deliver any Notices, payments or other
items required to be delivered by it to any Seller under this Agreement only to the Seller
Representative, and any such delivery will be fully effective as if it were made directly to any
relevant Seller.

     (l) Severability. Any term or provision of this Agreement that is invalid or
unenforceable in any situation in any jurisdiction shall not affect the validity or enforceability
of the remaining terms and provisions of this Agreement or the validity or enforceability of the
offending term or provision in any other situation or in any other jurisdiction.

     (m) Expenses. Except as otherwise provided in this §8(m), each of Buyer, on the one
hand, and Sellers, on the other hand, will bear its own costs and expenses (including legal fees
and expenses) incurred in connection with this Agreement and the Contemplated Transactions. All
transfer, documentary, sales, use, stamp, registration and other such Taxes, and all conveyance
fees, recording charges and other similar fees and charges (including any penalties and interest)
incurred in connection with the consummation of the Contemplated Transactions shall be paid by
Buyer when due, and Buyer shall, at its own expense, file all necessary Tax Returns and other
documentation with respect to all such Taxes, fees and charges, and, if required by applicable Law,
the Parties will, and will cause their Affiliates to, join in the execution of any such Tax Returns
and other documentation. Notwithstanding the foregoing, Sellers, on the one hand, and Buyer, on
the other hand, shall each pay their respective filing fees under the HSR Act, and all ad valorem
Taxes for the year 2006 shall be prorated as of the Effective Time between Buyer and Sellers.

     (n) Construction. The Parties have participated jointly in the negotiation and
drafting of this Agreement. If an ambiguity or question of intent or interpretation arises, then
this Agreement shall be construed as if drafted jointly by the Parties and no presumption or burden
of proof shall arise favoring or disfavoring any Party by virtue of the authorship of any of the
provisions of this Agreement. All references in this Agreement to articles, sections or
subdivisions thereof shall refer to the corresponding article, section, or subdivision thereof of
this Agreement unless specific reference is made to such articles, sections, or subdivisions of
another document or instrument. Any reference to any federal, state, local, or foreign statute or
Law shall be deemed also to refer to all rules and regulations promulgated thereunder, unless the
context requires otherwise. The word “including” means including without limitation.

     (o) Incorporation of Exhibits and Schedules. The Exhibits and Schedules identified in
this Agreement are incorporated in this Agreement by reference and made a part of this Agreement.

-53-

 

     (p) Bold and/or Capitalized Letters. THE PARTIES AGREE THAT THE BOLD AND/OR
CAPITALIZED LETTERS IN THIS AGREEMENT CONSTITUTE CONSPICUOUS LEGENDS.

     (q) 1031 Treatment. Sellers may have elected prior to Closing, that Buyer direct all
or a portion of the Estimated Purchase Price be delivered to a “qualified intermediary” (as defined
in Treasury Regulation Section 1.1031(k)-(g)(4)) to enable the applicable Sellers’ deemed
relinquishment of the Assets) to qualify as part of a like-kind exchange of property covered by
Section 1031 of the Code. If Sellers have so elected, Buyer shall cooperate with Sellers (but
without being required to incur any out-of-pocket costs in the course thereof) in connection with
their efforts to effect such like-kind exchange, which cooperation shall include, taking such
actions as the applicable Seller requests in order to enable such Seller to qualify such transfer
as part of a like-kind exchange of property covered by Section 1031 of the Code (including any
actions required to facilitate the use of a “qualified intermediary”). Additionally, consistent
with Treasury Regulation §1.1031(k)-1(g)(4)(v), Buyer agrees that the applicable Seller may assign
all or part of its rights under this Agreement to a Person acting as a qualified intermediary to
qualify the transfer of the Assets and agrees to notify Buyer in writing of the assignment on or
before the Closing Date. Buyer and Sellers agree to use reasonable commercial efforts to
coordinate the Contemplated Transactions with any other transactions engaged in by either Buyer or
Sellers. The Parties agree that the amount of cash deposited with a qualified intermediary that is
allocated to any particular Asset designated by Sellers as a ‘relinquished property’ shall not
exceed 45% of the fair market value of such Asset, as determined by the allocation of Final
Purchase Price described in §2(g). Any excess cash remaining in a qualified intermediary account
after Sellers have allocated such cash among all of the Assets they wish to treat as part of a
like-kind exchange will be released to Sellers and allocated among all of the other purchased
Assets.

[The signatures are on the next page.]

-54-

 

     The Parties are signing this Agreement on June 12, 2006.

	 	 	 	 	 	 	 	 	 
	LEG:	 	LEWIS ENERGY GROUP, L.P.
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	By: Tercero Navarro, Inc., general partner
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	By:
	 	     /s/ Rodney R. Lewis
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	Rodney R. Lewis
	 

	 	 	 	 	 	 	 	President
	 
	 	 	 	 	 	 	 	 
	CERRITO:	 	CERRITO GATHERING COMPANY, LTD.
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	By: Tercero Navarro, Inc., general partner
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	By:
	 	     /s/ Rodney R. Lewis
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	Rodney R. Lewis
	 

	 	 	 	 	 	 	 	President
	 
	 	 	 	 	 	 	 	 
	CGM:	 	CERRITO GAS MARKETING, LTD.
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	By: Tercero Navarro, Inc., general partner
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	By:
	 	     /s/ Rodney R. Lewis
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	Rodney R. Lewis
	 

	 	 	 	 	 	 	 	President
	 
	 	 	 	 	 	 	 	 
	EGL:	 	ENCINAL GATHERING, LTD.
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	By: Tercero Navarro, Inc., general partner
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	By:
	 	     /s/ Rodney R. Lewis
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	Rodney R. Lewis
	 

	 	 	 	 	 	 	 	President
	 
	 	 	 	 	 	 	 	 
	BUYER:	 	ENTERPRISE PRODUCTS PARTNERS L.P.
	 
	 	 	 	 	 	 	 	 
	 	 	 	 	By: Enterprise Products GP, LLC, general partner
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	By:
	 	     /s/ James H. Lytal
	 

	 	 	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 	James H. Lytal
	 

	 	 	 	 	 	 	 	Executive Vice President

[ Signatures page to Cerrito purchase agreement dated July 12, 2006.]

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