Document:

exv10w1

Exhibit 10.1

EXECUTION VERSION

PURCHASE AND SALE AGREEMENT

BY AND BETWEEN

DELTA PETROLEUM CORPORATION

(Seller)

AND

WAPITI OIL & GAS, L.L.C.

(Buyer)

Dated June 15, 2011

 

 

TABLE OF CONTENTS

	 	 	 	 	 

	ARTICLE 1 PURCHASE AND SALE
	 	 	1	 
	1.1 Purchase and Sale
	 	 	1	 
	1.2 Effective Time
	 	 	1	 
	1.3 Assets
	 	 	1	 
	1.4 Excluded Assets
	 	 	3	 
	ARTICLE 2 PURCHASE PRICE
	 	 	3	 
	2.1 Purchase Price
	 	 	3	 
	2.2 Allocation of the Purchase Price
	 	 	4	 
	2.3 Adjustments to Purchase Price and Preliminary Settlement
	 	 	4	 
	ARTICLE 3 BUYER’S INSPECTION
	 	 	6	 
	3.1 Due Diligence
	 	 	6	 
	3.2 Disclaimer
	 	 	7	 
	ARTICLE 4 TITLE MATTERS
	 	 	7	 
	4.1 Seller’s Title
	 	 	7	 
	4.2 Purchase Price Adjustment Procedures
	 	 	9	 
	4.3 Title Dispute Resolution
	 	 	12	 
	4.4 Preferential Rights and Consents
	 	 	13	 
	ARTICLE 5 ENVIRONMENTAL MATTERS
	 	 	14	 
	5.1 Definitions
	 	 	14	 
	5.2 Environmental Representation and Warranty
	 	 	15	 
	5.3 Environmental Liabilities and Obligations
	 	 	15	 
	ARTICLE 6 SELLER’S REPRESENTATIONS AND WARRANTIES
	 	 	16	 
	6.1 Status
	 	 	16	 
	6.2 Power
	 	 	16	 
	6.3 Authorization and Enforceability
	 	 	16	 
	6.4 Liability for Brokers’ Fees
	 	 	16	 
	6.5 No Bankruptcy
	 	 	16	 
	6.6 Litigation
	 	 	16	 
	6.7 Material Agreements
	 	 	16	 
	6.8 Taxes and Assessments
	 	 	17	 
	6.9 Judgments
	 	 	17	 
	6.10 Lease Status/Rentals/Royalties/Taxes
	 	 	18	 
	6.11 Calls on Production
	 	 	18	 
	ARTICLE 7 BUYER’S REPRESENTATIONS AND WARRANTIES
	 	 	18	 
	7.1 Organization and Standing
	 	 	18	 
	7.2 Power
	 	 	18	 
	7.3 Authorization and Enforceability
	 	 	18	 
	7.4 Liability for Brokers’ Fees
	 	 	19	 
	7.5 Litigation
	 	 	19	 
	7.6 Financial Resources
	 	 	19	 
	7.7 Buyer’s Evaluation
	 	 	19	 

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TABLE OF CONTENTS

(continued)

	 	 	 	 	 
	 	 	 	Page	 
	ARTICLE 8 COVENANTS AND AGREEMENTS
	 	 	19	 
	8.1 Covenants and Agreements of Seller
	 	 	19	 
	8.2 Covenants and Agreements of Buyer
	 	 	20	 
	8.3 Covenants and Agreements of the Parties
	 	 	20	 
	ARTICLE 9 TAX MATTERS
	 	 	21	 
	9.1 Definitions
	 	 	21	 
	9.2 Production Tax Liability
	 	 	21	 
	9.3 Sales Taxes
	 	 	21	 
	9.4 Tax Reports and Returns
	 	 	21	 
	ARTICLE 10 CONDITIONS PRECEDENT TO CLOSING
	 	 	22	 
	10.1 Seller’s Conditions
	 	 	22	 
	10.2 Buyer’s Conditions
	 	 	22	 
	ARTICLE 11 RIGHT OF TERMINATION
	 	 	23	 
	11.1 Termination
	 	 	23	 
	11.2 Liabilities Upon Termination
	 	 	23	 
	ARTICLE 12 CLOSING
	 	 	24	 
	12.1 Date of Closing
	 	 	24	 
	12.2 Place of Closing
	 	 	24	 
	12.3 Closing Obligations
	 	 	24	 
	ARTICLE 13 POST-CLOSING OBLIGATIONS
	 	 	25	 
	13.1 Post-Closing Adjustments
	 	 	25	 
	13.2 Records
	 	 	25	 
	13.3 Further Assurances
	 	 	25	 
	ARTICLE 14 ASSUMPTION AND RETENTION OF OBLIGATIONS AND INDEMNIFICATION;
	 	 	26	 
	DISCLAIMERS
	 	 	 	 
	14.1 Buyer’s Assumption of Liabilities and Obligations
	 	 	26	 
	14.2 Seller’s Retention of Liabilities and Obligations
	 	 	26	 
	14.3 Indemnification
	 	 	26	 
	14.4 Procedure
	 	 	27	 
	14.5 No Insurance; Subrogation
	 	 	28	 
	14.6 Reservation as to Non-Parties
	 	 	28	 
	14.7 Disclaimers
	 	 	28	 
	ARTICLE 15 MISCELLANEOUS
	 	 	29	 
	15.1 Schedules
	 	 	29	 
	15.2 Expenses
	 	 	29	 
	15.3 Notices
	 	 	29	 
	15.4 Amendments
	 	 	30	 
	15.5 Assignment
	 	 	30	 
	15.6 Headings
	 	 	30	 
	15.7 Counterparts/Fax Signatures
	 	 	30	 

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TABLE OF CONTENTS

(continued)

	 	 	 	 	 
	 	 	 	Page	 
	15.8 References
	 	 	31	 
	15.9 Governing Law
	 	 	31	 
	15.10 Entire Agreement
	 	 	31	 
	15.11 Knowledge
	 	 	31	 
	15.12 Binding Effect
	 	 	31	 
	15.13 Survival of Warranties, Representations and Covenants
	 	 	31	 
	15.14 No Third-Party Beneficiaries
	 	 	32	 
	15.15 Dispute Resolution and Arbitration
	 	 	32	 

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	Defined Terms	 	Section Reference
	Affected Asset
	 	4.4(a)
	Aggregate Title Deductible
	 	4.2(h)
	Agreement
	 	Preamble
	Allocated Value
	 	2.2
	Assets
	 	Recitals
	Assumed Liabilities
	 	14.1
	Buyer
	 	Preamble
	Buyer’s Environmental Liabilities
	 	5.3(b)
	Buyer’s Knowledge
	 	15.11(b)
	Cap
	 	14.3(c)
	Casualty Loss
	 	8.3(c)
	Claim
	 	14.4(b)
	Claim Notice
	 	14.4(a)
	Closing
	 	12.1
	Closing Amount
	 	2.3(a)
	Closing Date
	 	12.1
	Code
	 	9.1(a)
	Condition
	 	5.1
	Contracts
	 	1.3(g)
	COPAS
	 	2.3(b)
	Cure Period
	 	4.2(c)
	Deductible
	 	14.3(c)
	Defect Notice Date
	 	3.1
	Defensible Title
	 	4.1(c)
	Deposit
	 	2.1(a)
	Due Diligence Period
	 	3.1
	Due Diligence Review
	 	3.1
	Effective Time
	 	1.2
	Environmental Law
	 	5.1
	Escrow Account
	 	2.1(a)
	Escrow Agent
	 	2.1(a)
	Escrow Agreement
	 	2.1(a)
	Excluded Assets
	 	1.4
	Final Purchase Price
	 	13.1(a)
	Final Settlement Date
	 	13.1(a)
	Final Settlement Statement
	 	13.1(a)
	Fundamental Representations
	 	15.13
	Governmental Entity
	 	5.1
	Hazardous Materials
	 	5.1
	Hydrocarbons
	 	1.3(b)
	Indemnified Party
	 	14.4(a)
	Indemnifying Party
	 	14.4(a)
	Individual Title Deductible
	 	4,2(h)
	Lands
	 	1.3(a)
	Leases
	 	1.3(a)

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	Defined Terms	 	Section Reference
	Losses
	 	14.3
	Material Adverse Effect
	 	6
	Material Agreements
	 	6.7
	Net Casualty Loss
	 	8.3(c)
	Net Imbalance
	 	2.3(f)
	Net Revenue Interest
	 	4.1(c)(i)
	Notice of Defective Interest
	 	4.2(c)
	Obligations
	 	14.1
	Party; Parties
	 	Preamble
	Permitted Encumbrances
	 	4.1(d)
	Person
	 	6.7
	Plugging and Abandonment Obligations
	 	5.1
	Preliminary Settlement Statement
	 	2.3(a)
	Prior Purchase Agreement
	 	Preamble
	Production Taxes
	 	9.1(b)
	Property Expenses
	 	2.3(c)
	Purchase Price
	 	2.1
	Records
	 	1.3(h)
	Remediate; Remediation
	 	5.1
	Retained Liabilities
	 	14.2
	Seller
	 	Preamble
	Seller’s Environmental Liabilities
	 	5.3(a)
	Seller’s Knowledge
	 	15.11(a)
	Surface Contracts
	 	1.3(f)
	Survival Period
	 	15.13
	Title Adjustment Amount
	 	4.2(j)
	Title Benefit
	 	4.2(b)
	Title Benefit Notice
	 	4.2(d)
	Title Defect
	 	4.2(a)
	Title Defect Amount
	 	4.2(g)
	Title Defect Property
	 	4.2(c)
	Title Disputed Matters
	 	4.3
	Wells
	 	1.3(c)
	Working Interest
	 	4.1(c)(ii)

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List of Exhibits

	 	 	 

	Exhibit A

	 	Leases
	Exhibit B

	 	Wells
	Exhibit C

	 	Contracts
	Exhibit D

	 	Escrow Agreement
	Exhibit E

	 	Form of Assignment, Bill of Sale and Conveyance
	Exhibit F

	 	Form of Assignment and Assumption Agreement
	Exhibit G

	 	Affidavit of Non-Foreign Status

List of Schedules

	 	 	 

	Schedule 1.6(b)

	 	Excluded Assets
	Schedule 2.2

	 	Allocated Values
	Schedule 4.4

	 	Preferential Rights and Consents
	Schedule 6.6

	 	Pending or Threatened Litigation
	Schedule 6.8

	 	Taxes and Assessments
	Schedule 6.11

	 	Calls on Production
	Schedule 15.11(a)

	 	Seller’s Knowledge Representatives
	Schedule 15.11(b)

	 	Buyer’s Knowledge Representatives

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PURCHASE AND SALE AGREEMENT

     This Purchase and Sale Agreement (the “Agreement”), is dated this 15th day of June, 2011, by
and between Delta Petroleum Corporation, a Delaware corporation (“Seller”), whose address is 370
17th Street, Suite 4300, Denver, CO 80202, and Wapiti Oil & Gas, L.L.C., a Delaware limited
liability company (“Buyer”), whose address is 800 Gessner, Suite 700, Houston, Texas 77024. Buyer
and Seller are collectively and individually referred to herein as the “Parties” or a “Party”.

RECITALS

     WHEREAS, Seller owns non-operating working interests in certain oil and gas leases located in
Texas, Wyoming and Utah, and associated assets as more fully described in Section 1.3 (the
“Assets”);

     WHEREAS, Buyer previously acquired undivided working interests in the Assets from Seller,
pursuant to a Purchase and Sale Agreement dated July 23, 2010 (the “Prior Purchase Agreement”), and
Buyer is now the operator of the Assets; and

     WHEREAS, Seller desires to sell and Buyer desires to purchase all of Seller’s remaining
interest in the Assets upon the terms and conditions set forth in this Agreement.

     NOW WHEREFORE, in consideration of the mutual promises contained herein and other good and
valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Buyer and
Seller agree as follows:

ARTICLE 1

PURCHASE AND SALE

     1.1
Purchase and Sale. Subject to the terms and conditions of this Agreement, Buyer
agrees to purchase from Seller and Seller agrees to sell, assign and deliver to Buyer, all of
Seller’s right, title and interest in the Assets for the consideration specified in Article 2.

     1.2
Effective Time. The purchase and sale of the Assets shall be effective as of June 1,
2011, at 7:00 a.m. at the location of the Assets (the “Effective Time”).

     1.3
Assets. As used herein, the term “Assets” refers to all of Seller’s right, title and
interest in and to the following as of the Effective Time:

          (a) The oil and gas leases (including all leasehold estates, mineral interests, royalty
interests, overriding royalty interests, net profits interests, or similar interests) specifically
described in Exhibit A (the “Leases”) and the lands covered thereby or lands pooled
or unitized therewith, and all lands covered by such leases and interests, even though such
rights might be omitted from Exhibit A or incorrectly described on Exhibit A (the “Lands”);

          (b) The oil, gas, casinghead gas, coalbed methane, condensate and other gaseous and liquid
hydrocarbons or any combination thereof, sulphur extracted from

 

 

hydrocarbons and all other lease substances under the Leases (“Hydrocarbons”) that may be
produced and saved under the Leases;

          (c) The oil, gas, water or injection wells located on the Lands, whether producing, shut-in,
or temporarily abandoned, specifically described in Exhibit B (the “Wells”), including all
of the personal property, equipment, fixtures and improvements used in connection therewith;

          (d) The unitization, pooling and communitization agreements, declarations, orders, and the
units created thereby relating to the properties and interests described in Sections 1.3(a) through
(c) and to the production of Hydrocarbons, if any, attributable to said properties and interests;

          (e) All equipment, machinery, fixtures and other tangible personal property and improvements
located on or used or held for use in connection with the operation of the interests described in
Sections 1.3(a) through (d) including any wells, tanks, boilers, buildings, fixtures, injection
facilities, saltwater disposal facilities, compression facilities, pumping units and engines,
platforms, flow lines, pipelines, gathering systems, gas and oil treating facilities, machinery,
power lines, telephone and telegraph lines, roads, and other appurtenances, improvements and
facilities;

          (f) All surface leases, permits, rights-of-way, licenses, easements and other surface rights
agreements used in connection with the production, gathering, treatment, processing, storing, sale
or disposal of Hydrocarbons or produced water from the interests described in Sections 1.3(a)
through (e) (the “Surface Contracts”);

          (g) All existing contracts and effective sales, purchase contracts, operating agreements,
exploration agreements, development agreements, balancing agreements, farmout agreements, service
agreements, transportation, processing, treatment or gathering agreements, equipment leases and
other contracts, agreements and instruments, including the contracts described in Exhibit
C, insofar as they directly relate to the properties and interests described in Sections
1.3(a) through (f) (the “Contracts”) and provided that “Contracts” shall not include the
instruments constituting the Leases;

          (h) To the extent transferable without payment of additional consideration, originals, to the
extent available, or copies of all the files, records and data relating to the items described in
Sections 1.3(a) through (g) above, which records shall include, without limitation: lease records;
well records; division order records; well files; title records (including abstracts of title,
title opinions and memoranda, and title curative documents); engineering records; geological and
geophysical data (including seismic data) and all technical evaluations, interpretive data,
technical data and information relating to the Assets; correspondence; electronic data files (if
any); maps; production records; electric logs; core data; pressure data;
decline curves and graphical production curves; reserve reports; appraisals and accounting
records (the “Records”).

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     1.4 Excluded Assets. Notwithstanding the foregoing, the Assets shall not include, and there is
excepted, reserved and excluded from the purchase and sale contemplated hereby (collectively, the
“Excluded Assets”):

          (a) (i) all corporate, financial, income, tax and legal records of Seller that relate to
Seller’s business generally (whether or not relating to the Assets) and (ii) all books, records and
files that relate to the Excluded Assets;

          (b) the property listed on Schedule 1.6(b) including: (i) vehicles not used on the
Assets, (ii) equipment, inventory, machinery, fixtures and other tangible personal property and
improvements that are leased by Seller or located at or used in connection with any field office or
yard of Seller that are not used solely in connection with the Assets (iii) any computers and
related peripheral equipment that are not located on the Assets or not used solely in connection
with the Assets, (iv) communications equipment that is not located on the Assets and not used
solely in connection with the Assets, and (v) communications licenses granted by the Federal
Communications Commission or other Governmental Entity;

          (c) all rights to any refunds for taxes or other costs or expenses borne by Seller or Seller’s
predecessor’s in interest and title attributable to periods prior to the Effective Time;

          (d) Seller’s area wide bonds, permits and licenses or other permits, licenses or
authorizations used in the conduct of Seller’s business generally;

          (e) all trade credits, account receivables, note receivables, take or pay amounts receivable,
and other receivables attributable to the Assets with respect to any period of time prior to the
Effective Time;

          (f) Contracts and Surface Contracts to the extent the necessary consents to transfer are not
obtained pursuant to Section 4.1(a);

          (g) any refunds due Seller by a third party for any overpayment of rentals, royalties, excess
royalty interests or production payments attributable to the Assets with respect to any period of
time prior to the Effective Time; and

          (h) any causes of action, claims, rights, indemnities or defenses with respect to the Assets,
whether arising before or after the Effective Time, that relate to the Retained Liabilities or with
respect to any indemnification obligation of Seller hereunder as more fully described in Article 14
below.

ARTICLE 2

PURCHASE PRICE

     2.1 Purchase Price. Subject to the other terms and conditions of this Agreement, the
purchase price for the Assets shall be Forty Three Million Two Hundred Thousand Dollars
($43,200,000) (the “Purchase Price”). The Purchase Price shall be payable as follows:

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          (a) Contemporaneously with the execution of this Agreement, the Parties and BNP Paribas (the
“Escrow Agent”) have entered into an escrow agreement in the form of Exhibit D (the “Escrow
Agreement”), pursuant to which, within one (1) business day of Seller’s and Buyer’s execution of
the Agreement, Buyer shall deposit in an escrow account (“Escrow Account”), by wire transfer of
immediately available funds, a deposit equal to five percent (5%) of the Purchase Price (the
“Deposit”). Except as otherwise set forth in this Agreement, the Deposit together with accrued
interest shall be credited against the Purchase Price at Closing, or upon termination of this
Agreement, the Deposit and accrued interest shall be retained by Seller or returned to Buyer in
accordance with Article 11.

          (b) The Closing Amount (as defined in Section 2.3(a) below) shall be paid at Closing by wire
transfer of immediately available funds to Seller.

          (c) After Closing, final adjustments to the Purchase Price shall be made pursuant to the Final
Settlement Statement to be delivered pursuant to Section 13.1(a) and payments made by Buyer or
Seller as provided in Section 13.1(a).

     2.2 Allocation of the Purchase Price. Buyer and Seller have agreed upon an allocation of
the unadjusted Purchase Price among each of the Assets, in compliance with the principles of
Section 1060 of the Code and the regulations thereunder, which is attached hereto as Schedule
2.2. The “Allocated Value” for any Asset equals the portion of the unadjusted Purchase Price
allocated to such Asset on Schedule 2.2, increased or reduced as described in this Article
2. Any adjustments to the Purchase Price other than the adjustments provided for in Section 2.3
shall be applied on a pro rata basis to the amounts set forth on Schedule 2.2 for all
Assets. After all such adjustments are made, any adjustments to the Purchase Price pursuant to
Section 2.3 shall be applied to the amounts set forth in Schedule 2.2, for the particular
affected Assets. Seller is deemed to have accepted such Allocated Values for purposes of this
Agreement and the transactions contemplated hereby, but otherwise Seller makes no representation or
warranty as to the accuracy of the Allocated Values. Seller and Buyer agree (i) that the Allocated
Values, as adjusted pursuant to the foregoing, shall be used by Seller and Buyer as the basis for
reporting asset values and other items for purposes of all federal, state and local Tax Returns,
including without limitation Internal Revenue Service Form 8594 and (ii) that neither they nor
their affiliates will take a contrary position with respect to such Allocated Values in notices to
a Governmental Entity, in audit or other proceedings with respect to Taxes, in notices to
preferential purchaser right holders, or in other documents or notices relating to the transactions
contemplated by this Agreement.

     2.3 Adjustments to Purchase Price and Preliminary Settlement.

          (a) Preliminary Statement. The Purchase Price shall be adjusted according to this
Section 2.3 without duplication. Such adjustment shall be set out on a “Preliminary Settlement
Statement” that shall be delivered by Buyer to Seller at least three (3) business days prior to
Closing and shall be approved by Buyer and Seller on or before Closing. The Preliminary Settlement
Statement shall set forth the Purchase Price as adjusted as provided in this Section 2.3 using the
best information available at Closing, which amount shall be paid at Closing and is referred to
herein as the “Closing Amount.”

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          (b) Proration of Costs and Revenues. Buyer shall be entitled to all production of
Hydrocarbons from or attributable to the Leases, Lands, and Wells at and after the Effective Time
(and all products and proceeds attributable thereto), and to all other income, proceeds, receipts
and credits earned with respect to the Assets at or after the Effective Time, and shall be
responsible for (and entitled to any refunds with respect to) all Property Expenses (as defined in
Section 2.3(c) below) incurred at and after the Effective Time. Seller shall be entitled to all
Hydrocarbon production from or attributable to Leases, Lands, and Wells prior to the Effective Time
(and all products and proceeds attributable thereto), and to all other income, proceeds, receipts
and credits earned with respect to the Assets prior to the Effective Time, and shall be responsible
for (and entitled to any refunds with respect to) all Property Expenses incurred prior to the
Effective Time. “Earned” and “incurred”, as used in the Agreement shall be interpreted in
accordance with generally accepted accounting principles and Council of Petroleum Accountants
Society (“COPAS”) standards, except as otherwise specified herein. For purposes of allocating
production (and accounts receivable with respect thereto), under this Section 2.3(b), (i) liquid
Hydrocarbons shall be deemed to be “from or attributable to” the Leases, Lands, and Wells when they
pass through the pipeline connecting into the storage facilities into which they are run and (ii)
gaseous Hydrocarbons shall be deemed to be “from or attributable to” the Leases, Lands, and Wells
when they pass through the royalty measurement meters, delivery point sales meters or custody
transfer meters on the gathering lines or pipelines through which they are transported (whichever
meter is closest to the well). Buyer shall utilize reasonable interpolative procedures, consistent
with industry practice, to arrive at an allocation of production when exact meter readings or
gauging and strapping data are not available. As part of Preliminary Settlement Statement, Buyer
shall provide to Seller all data necessary to support any estimated allocation, for purposes of
establishing the Closing Amount.

          (c) Property Expenses. The term “Property Expenses” means all capital expenses,
Production Taxes (as defined and apportioned as of the Effective Time pursuant to Article 9) and
operating expenses incurred in the ownership, development and operation of the Assets in the
ordinary course of business and, where applicable, in accordance with any relevant operating
agreement, if any, and all Lease rental and maintenance costs, net profit payments, royalties,
overriding royalties and other similar burdens incurred in connection with the Leases or the
production and sale of Hydrocarbons therefrom. Property Expenses shall include overhead for the
period between the Effective Time and the Closing Date based upon the applicable joint operating
agreement and where no joint operating agreement is applicable the overhead shall be $750.00 per
month for each Well that produces for any portion of such month.

          (d) Upward Adjustments. To calculate the Closing Amount, the Purchase Price shall be
adjusted upward by the following:

          (1) The proceeds received by Buyer, net of royalties, overriding royalties, profit
payments and similar burdens and Production Taxes, from the sale of any Hydrocarbons that
were produced from the Assets prior to the Effective Time.

          (2) An amount equal to all Property Expenses attributable to the Assets from and after
the Effective Time that were paid by Seller prior to Closing (all to be apportioned as of
the Effective Time except as otherwise provided);

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          (3) An amount equal to the Title Adjustment Amount attributed to Title Benefits, if
any, pursuant to Section 4.2; and

          (4) Any other amount provided for in this Agreement or otherwise agreed to by Buyer and
Seller.

          (e) Downward Adjustments. To calculate the Closing Amount, the Purchase Price shall
be adjusted downward by the following:

          (1) The amount of the Deposit;

          (2) An amount equal to the Title Adjustment Amount attributed to Title Defects, if any,
pursuant to Section 4.2;

          (3) The Allocated Value of those Assets not conveyed at Closing due to the failure to
obtain a consent to assign in accordance with Section 4.1(a) or the exercise of any
preferential rights to purchase in accordance with Section 4.1(b).

          (4) Any proceeds on Hydrocarbons produced from and after the Effective Time, net of
royalties, overriding royalties, net profit payments and similar burdens and Production
Taxes, received by Seller between the Effective Time and Closing relating to the Assets;

          (5) An amount equal to all Property Expenses attributable to the Assets for the period
before the Effective Time that were paid by Buyer prior to Closing;

          (6) The value of any Casualty Loss or Net Casualty Loss pursuant to Section 8.3(c); and

          (7) Any other amount provided in this Agreement or otherwise agreed to by Buyer and
Seller.

          (f) Pipeline and Well Imbalance Adjustments. The Parties agree that in calculating
the Closing Amount, the Purchase Price will be adjusted downward or upward, as appropriate, for
pipeline and well imbalances related to the Assets, if any, as follows: The sum of all gas
underproduction imbalances less the sum of all overproduction imbalances is herein called the “Net
Imbalance.” The Purchase Price shall be adjusted upward (if the Net Imbalance
is a positive number), or downward (if the Net Imbalance is a negative number) by an amount
equal to (a) the absolute value of the Net Imbalance multiplied by (b) $3.50 per Mmbtu.

ARTICLE 3

BUYER’S INSPECTION

     3.1 Due Diligence. The Parties acknowledge that since (i) Buyer had the opportunity to
conduct extensive title and environmental due diligence in connection with the Prior Purchase
Agreement, and (ii) Buyer is the operator of the Assets, only limited due diligence review is
necessary in connection with the transaction contemplated by this Agreement, as hereinafter
provided. Upon execution of this Agreement, Seller will make the Records available to Buyer

-6-

 

and its representatives for inspection and review at the offices of Seller during Seller’s normal
business hours to permit Buyer to perform its due diligence (“Due Diligence Review”). Buyer shall
be entitled to conduct its Due Diligence Review until 5:00 p.m. Mountain Time on June 28, 2011 (the
“Due Diligence Period”). All notices pertaining to the Due Diligence Review must be received by
Seller no later than 5:00 pm Mountain Time on June 28, 2011 (the “Defect Notice Date”)

     3.2 Disclaimer. Except for the specific representations and warranties contained in this
Agreement, Seller makes no warranty or representation of any kind as to the Records or any
information contained therein. Buyer agrees that any conclusions drawn from the Records shall be
the result of its own independent review and judgment.

ARTICLE 4

TITLE MATTERS

     4.1 Seller’s Title.

          (a) Limited Defensible Title Representation. Seller represents to Buyer that as of
the Defect Notice Date its title to the Leases and Wells is Defensible Title as defined in Section
4.1(c). Except as set forth in this Section 4.1(a), Seller makes no warranty or representation,
express, implied, statutory or otherwise, with respect to Seller’s title to the Leases and Wells
and Buyer hereby acknowledges and agrees that Buyer’s sole remedy for any defect of title,
including any Title Defect, with respect to any of the Leases and Wells before Closing, shall be
Buyer’s right to adjust the Purchase Price to the extent provided in this Article 4.

          (b) Exclusive Remedy. The representation in Section 4.1(a) shall terminate as of the
Defect Notice Date and shall have no further force and effect thereafter. The Assignment and Bill
of Sale delivered at Closing shall contain a limited warranty of title as set forth in the
instrument attached hereto as Exhibit D. Section 4.2 shall be the exclusive right and
remedy of Buyer with respect to Seller’s failure to have Defensible Title with respect to the
Leases and Wells.

          (c) Defensible Title. The term “Defensible Title” means such ownership of record
title to the Leases and Wells, that, subject to and except for Permitted Encumbrances as defined in
Section 4.1(d):

          (i) Entitles Seller to receive a share of the Hydrocarbons produced, saved and marketed
from any Lease or Well throughout the duration of the productive life of such Lease or Well
or such specified zone(s) therein after satisfaction of all royalties, overriding royalties,
nonparticipating royalties, net profits interests or other similar burdens on or measured by
production of Hydrocarbons (a “Net Revenue Interest”), of not less than the Net Revenue
Interest share shown in Exhibit A or B, as applicable, for such Lease or Well;

          (ii) Obligates Seller to bear a percentage of the costs and expenses for the
maintenance, development, operation and the production relating to any Lease or Well
throughout the productive life of such Lease or Well (“Working Interest”) not greater than
the Working Interest shown in Exhibit A or B, as applicable, for such Lease

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or Well
without increase, except increases to the extent that they are accompanied by a
proportionate increase in Seller’s Net Revenue Interest; and

          (iii) is free and clear of liens, encumbrances and defects.

          (d) Permitted Encumbrances. The term “Permitted Encumbrances” shall mean:

          (1) lessors’ royalties, overriding royalties, net profits interests, production
payments, reversionary interests and similar burdens if the net cumulative effect of such
burdens does not operate to reduce the Net Revenue Interests below those set forth on
Exhibit A or B, as applicable, for such Lease or Well;

          (2) statutory liens for taxes, Production Taxes or assessments not yet due and
delinquent or if delinquent are being contested in good faith in the normal course of
business;

          (3) all rights to consent by, required notices to, filings with, or other actions by a
Governmental Entity, in connection with the conveyance of the applicable Asset if the same
are customarily sought after such conveyance;

          (4) rights of reassignment contained in any Leases, or assignments thereof, providing
for reassignment upon the surrender or expiration of any Leases;

          (5) easements, rights-of-way, servitudes, permits, surface leases and other rights with
respect to surface operations, on, over or in respect of any of the Assets or any
restriction on access thereto that do not materially interfere with the operation of the
affected Asset;

          (6) the terms and conditions of the Contracts listed in Exhibit C to the extent
such terms and conditions do not cause the Net Revenue Interest to be less than or
the Working Interest to be more than as set forth in Exhibits A or B,
respectively, for the applicable Lease or Well;

          (7) materialmen’s, mechanics’, operators’ or other similar liens arising in the
ordinary course of business (i) if such liens and charges have not been filed pursuant to
law and the time for filing such liens and charges has expired, (ii) if filed, such liens
and charges have not yet become due and payable or payment is being withheld as provided by
law, or (iii) if their validity is being contested in good faith by appropriate action;

          (8) such Title Defects (as defined in Section 4.2(a)) as Buyer has waived;

          (9) any defects, irregularities or deficiencies in title to any Surface Contract that
does not materially adversely affect the value of any Asset;

          (10) any liens of record that Seller causes to be released at Closing; and

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          (11) all other liens, charges, encumbrances, contracts, agreements, instruments,
obligations, defects and irregularities affecting the Assets that do not (or would not upon
foreclosure or other enforcement) reduce the Net Revenue Interest set forth in Exhibit A
or B, respectively, for the applicable Lease or Well, nor prevent the receipt of
proceeds of production therefrom, nor increase the share of costs above the Working Interest
set forth in Exhibit A or B, respectively, for the applicable Lease or Well, nor
materially adversely interfere with or detract from the ownership, operation, value or use
of the Assets.

     4.2 Purchase Price Adjustment Procedures.

          (a) Title Defect. As used in this Agreement, the term “Title Defect” means any lien,
charge, encumbrance, obligation (including contract obligation), defect, or other matter (including
without limitation a discrepancy in Net Revenue Interest or Working Interest) that causes a breach
of Seller’s representation in Section 4.1(a). Notwithstanding the foregoing, the following shall
not be considered Title Defects:

          (1) defects based solely on lack of information in connection with documents filed of
record not contained in Seller’s files;

          (2) defects in the chain of title consisting of the mere failure to recite marital
status in a document or omissions of successions of heirship or estate proceedings, unless
Buyer provides clear and convincing evidence that such failure or omission has resulted in
another Person’s actual and superior claim of title to the relevant Asset;

          (3) defects arising out of lack of survey, unless a survey is expressly required by
applicable laws or regulations;

          (4) defects asserting a change in Working Interest or Net Revenue Interest based on a
change in drilling and spacing units, tract allocation or other changes in pool or unit
participation occurring after the Effective Time by a party other than the Seller;

          (5) defects arising out of lack of corporate or other entity authorization unless Buyer
provides affirmative evidence that such corporate or other entity action was not authorized
and results in another person’s actual and superior claim of title to the relevant Asset;

          (6) defects based on failure to record Leases issued by the BLM, MMS or any state
agency, or any assignments of record title or operating rights in such Leases, in the real
property, conveyance or other records of the county in which such Lease is located;

          (7) defects that have been cured by applicable statutes of limitations for adverse
possession or prescription; and

          (8) any defects arising prior to May 1, 2010.

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          (b) Title Benefit. As used in this Agreement, the term “Title Benefit” shall mean any
right, circumstance or condition that operates (i) to increase the Net Revenue Interest of Seller
in any Lease or Well above that shown in Exhibit A, to the extent the same does not cause a
greater than proportionate increase in Seller’s Working Interest therein above that shown in
Exhibit A, or (ii) to decrease the Working Interest of Seller in any Lease or Well below
that shown in Exhibit A, to the extent the same causes a decrease in Seller’s Working
Interest that is proportionately greater than the decrease in Seller’s Net Revenue Interest therein
below that shown in Exhibit A.

          (c) Notice of Defective Interest. On or before the Defect Notice Date, Buyer shall
formally advise Seller in writing of any matters that in Buyer’s reasonable opinion constitute a
Title Defect with respect to Seller’s title to all or any portion of the Leases and Wells (“Notice
of Defective Interest”). The Notice of Defective Interest shall be in writing and contain the
following: (i) a clear, complete and accurate description of the alleged Title Defect(s), (ii) the
Leases or Wells (and the applicable zone(s) therein) affected by the alleged Title Defect(s) (each
a “Title Defect Property”), (iii) the Allocated Value of each Lease or Well subject to the alleged
Title Defect(s), (iv) supporting documents reasonably necessary for Seller (as well as any title
attorney or examiner hired by Seller) to verify the existence of the alleged Title Defect(s), and
(v) the amount by which Buyer reasonably believes the Allocated Value of each Title Defect Property
is reduced by the alleged Title Defect(s) and the computations and information upon which Buyer’s
belief is based. To give Seller an opportunity to commence reviewing and curing Title Defects,
Buyer agrees to give Seller, on or before the end of each calendar week prior to the Defect Notice
Date, written notice of all Title Defects discovered by Buyer during the calendar week preceding
the calendar week then ending, which may be preliminary in nature and supplemented prior to the
Defect Notice Date. Seller shall be deemed
to have waived all Title Defects of which it has not given notice on or before the Defect
Notice Date.

          (d) Notice of Title Benefit. On or before the Defect Notice Date, Seller shall have
the right, but not the obligation, to advise Buyer in writing of any matters that in Seller’s
reasonable opinion constitute a Title Benefit with respect to Seller’s title to all or any portion
of the Leases and Wells (a “Title Benefit Notice”). The Title Benefit Notice shall be in writing
and contain the following: (i) a description of the Title Benefit, (ii) the Leases or Wells (and
the applicable zone(s) therein) affected by the Title Benefit, (iii) the Allocated Values of the
Leases or Wells (and the applicable zone(s) therein) subject to such Title Benefit, and (iv) the
amount by which the Seller reasonably believes the Allocated Value of those Leases or Wells (and
the applicable zone(s) therein) is increased by the Title Benefit, and the computations and
information upon which Seller’s belief is based. Seller shall be deemed to have waived all Title
Benefits of which it has not given notice on or before the Defect Notice Date.

          (e) Seller’s Right to Cure. Seller shall have the right, but not the obligation, to
attempt, at its sole cost, to cure or remove at any time prior to Closing (the “Cure Period”) any
Title Defects of which it has been advised by Buyer.

          (f) Remedies for Title Defects. Subject to Seller’s continuing right to title dispute
resolution under Section 4.3, in the event that any Title Defect timely asserted by Buyer

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in
accordance with Section 4.3(c) actually exists and is not waived by Buyer or cured on or before
Closing, Seller shall elect the following:

          (1) subject to the Individual Title Deductible and the Aggregate Title Deductible,
convey the Title Defect Property to Buyer at Closing with a reduction to the Purchase Price
by an amount agreed upon pursuant to Section 4.2(g) and retain the right to cure the Title
Defect after Closing. Seller shall have until the Final Settlement Date in which to attempt
to cure any such Title Defects. If Seller cures any such Title Defect, then Buyer shall
promptly pay Seller the Title Defect Amount with respect to the Title Defect that is so
cured, expressly provided that the Buyer retains the right to waive any such Title Defect
that remains subject to cure and to purchase and pay for the affected Asset at any time
prior to the Final Settlement Date;

          (2) with the consent of Buyer, convey the Title Defect Property to Buyer at Closing,
without adjustment to the Purchase Price, and indemnify Buyer against all liability, loss,
cost and expense resulting from such Title Defect, pursuant to the terms and conditions of
the Indemnification Agreement attached hereto as Exhibit E; or

          (3) with the consent of Buyer, retain the entirety of the Leases or Wells subject to
such Title Defect, together with all associated Assets, in which event the Purchase Price
shall be reduced by an amount equal to the Allocated Value of such property and such
associated Assets.

          (g) Title Defect Amount. The “Title Defect Amount” means the amount by which the
Allocated Value of the Title Defect Property affected by such Title Defect is reduced
as a result of the existence of such Title Defect and shall be determined in accordance with
the following methodology, terms and conditions:

          (1) if Buyer and Seller agree on the Title Defect Amount, that amount shall be the
Title Defect Amount;

          (2) if the Title Defect is a lien, encumbrance or other charge which is undisputed and
liquidated in amount, then the Title Defect Amount shall be the amount of the payment
necessary to remove the Title Defect from the Title Defect Property; and

          (3) if the Title Defect represents an obligation, encumbrance, burden or charge upon or
other defect in title to the Title Defect Property of a type not described in subsections
(1) or (2) above, the Title Defect Amount shall be determined by taking into account the
following factors: (i) any discrepancy between (A) the Net Revenue Interest for any Title
Defect Property and (B) the Net Revenue Interest stated in Exhibit A; (ii) the
Allocated Value of the Title Defect Property; (iii) the portion of the Title Defect Property
affected by the Title Defect; (iv) the legal effect of the Title Defect; (v) the values
placed upon the Title Defect by Buyer and Seller and (vi) such other reasonable factors as
are necessary to make a proper evaluation.

Notwithstanding anything to the contrary in this Article 4, the aggregate Title Defect Amounts
attributable to the effects of all Title Defects upon any Title Defect Property shall not exceed
the Allocated Value of the Title Defect Property.

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          (h) Title Deductibles. Notwithstanding anything to the contrary, (i) in no event shall
there be any adjustments to the Purchase Price or other remedies provided by Seller for any
individual Title Defect for which the Title Defect Amount does not exceed $20,000 (“Individual
Title Deductible”); and (ii) in no event shall there be any adjustments to the Purchase Price or
other remedies provided by Seller for any Title Defect that exceeds the Individual Title Deductible
unless the Title Defect Amounts of all such Title Defects, in the aggregate, excluding any Title
Defects cured by Seller, exceeds a deductible in an amount equal to One Million Dollars
($1,000,000) (“Aggregate Title Deductible”), after which point Buyer shall be entitled to
adjustments to the Purchase Price or other remedies only with respect to such Title Defects in
excess of such Aggregate Title Deductible.

          (i) Title Benefit Amount. The Title Benefit Amount resulting from a Title Benefit
shall be determined in accordance with the same methodology, terms and conditions for determining
the Title Defect Amount. Any Title Benefit Amount shall be offset against any Title Defect Amount.
In the event the Title Benefit Amounts exceeds the Title Defect Amounts then in no event shall
there be any adjustments to the Purchase Price or other remedies provided by Buyer for any Title
Benefit that exceeds the Individual Title Deductible unless the Title Benefit amounts of all such
Title Benefits, in the aggregate, exceed the Aggregate Title Deductible, after which point Seller
shall be entitled to an adjustment to the Purchase Price only with respect to Title Benefits in
excess of such Aggregate Title Benefit Deductible.

          (j) Title Adjustment Amount. The amount by which the Purchase Price is adjusted under
this Article 4 for a Title Defect Amount or a Title Benefit Amount shall be
referred to as the “Title Adjustment Amount”, provided, however, that Buyer, at its sole
discretion, may elect to waive all or any portion of any Title Defect as to the Buyer, so as to
reduce the aggregate Title Adjustment Amount below such percentage which would prevent termination
of this Agreement pursuant to Section 11.1(d).

     4.3 Title Dispute Resolution. The Parties agree to resolve disputes concerning the
following matters pursuant to this Section 4.3: (i) the existence and scope of a Title Defect,
Title Benefit or Title Adjustment Amount, (ii) the Title Defect Amount of that portion of the Asset
affected by a Title Defect and (iii) the adequacy of Seller’s Title Defect curative materials and
Buyer’s reasonable satisfaction thereof (the “Title Disputed Matters”). The Parties agree to
attempt to initially resolve all disputes through good faith negotiations. If the Parties cannot
resolve disputes regarding items (i), (ii) and (iii) on or before Closing, the asset will be
excluded from the Closing and the Purchase Price reduced by the Allocated Value of the affected
Asset. Further, the Title Disputed Matters will be finally determined by binding arbitration
pursuant to Section 15.15 but the independent arbitrator appointed pursuant to Section 15.15 shall
be qualified by education, knowledge and experience with title defects affecting the types of
properties which are subject to the disputed Title Defect and have a minimum of ten years
experience with such types of defects and properties. The arbitrator shall employ such independent
attorneys, petroleum engineers and/or other consultants as deemed necessary. On or before
forty-five (45) days after Closing, Buyer and Seller shall present their respective positions in
writing to the arbitrator, together with such evidence as each Party deems appropriate. The
arbitrator shall be instructed to resolve the dispute through a final decision within sixty (60)
days after Closing and the final decision may be reflected in the Final Settlement Statement. To
the

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extent that the arbitrator so rules, Seller will convey to Buyer the affected Asset in
accordance with the terms and conditions of the decision rendered by the arbitrator.

     4.4 Preferential Rights and ConsentsExcept for Permitted Encumbrances, all preferential
rights to purchase and consents to assign are listed on Schedule 4.4. The remedies set
forth in this Section 4.4 are the exclusive remedies under this Agreement for consents to assign
and preferential rights to purchase that are disclosed on Schedule 4.4 or are discovered
prior to Closing.

          (a) Consents. Promptly after execution hereof, Seller shall use reasonable best
efforts to send notices to those persons necessary to request all required consents to assignment
of the Assets. If prior to Closing Seller fails to obtain a consent to assign that would
invalidate the conveyance of the Asset affected by the consent to assign or materially affect the
value or use of the Asset (“Affected Asset”), then Seller shall retain the Affected Asset and the
Purchase Price shall be reduced by the Allocated Value of the Affected Asset. If such consent has
been obtained as of the Final Settlement Date, Seller shall convey the Affected Asset to Buyer
effective as of the Effective Time and Buyer shall pay Seller the Allocated Value of the Affected
Asset, in accordance with the terms and conditions of this Agreement. If such consent has not been
obtained as of the Final Settlement Date, the Affected Asset shall be excluded from the sale and
the Purchase Price shall be deemed to be reduced by an amount equal to the Allocated Value of the
Affected Asset. Buyer shall reasonably cooperate with Seller in
obtaining any required consent including providing assurances of reasonable financial
conditions, but Buyer shall not be required to expend funds or make any other type of financial
commitments as a condition of obtaining such consent.

          (b) Preferential Purchase Rights. Seller shall use reasonable best efforts to give
notices required in connection with preferential purchase rights prior to Closing. If any
preferential right to purchase any portion of the Assets is exercised prior to the Closing Date,
then that portion of the Assets affected by such preferential purchase right shall be excluded from
the Assets and the Purchase Price shall be adjusted downward by an amount equal to the Allocated
Value of such affected Assets without the requirement for Buyer to give notice. If by Closing,
either (i) the time frame for the exercise of a preferential purchase right has not expired and
Seller has not received notice of an intent not to exercise or a waiver of the preferential
purchase right, or (ii) a third party exercises its preferential right to purchase, but fails to
consummate the purchase prior to the Closing, then Seller shall retain the affected Assets and the
Purchase Price shall be adjusted downward by an amount equal to the Allocated Value of such
affected Assets. As to any Assets retained by Seller under this Section 4.4(b), following Closing
if the preferential right to purchase is not consummated within the time frame specified in the
preferential purchase right, or if the time frame for exercise of the preferential purchase right
expired without exercise after the Closing, Seller shall promptly convey the affected Asset to
Buyer effective as of the Effective Time, and Buyer shall pay the Allocated Value thereof pursuant
to the terms of this Agreement up to and through the Final Settlement Date and in connection with
the payments to be made with respect to the Final Settlement Statement as set forth in Section
13.1, below.

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ARTICLE 5

ENVIRONMENTAL MATTERS

     5.1 Definitions. For the purposes of the Agreement, the following terms shall have the
following meanings:

     “Condition” means any circumstance, status or defect that requires Remediation comply with
Environmental Laws.

     “Environmental Law” or “Environmental Laws” shall mean shall mean any federal, tribal, state,
local or foreign law (including common law), statute, rule, regulation, requirement, ordinance and
any writ, decree, bond, authorization, approval, license, permit, registration, binding criteria,
standard, consent decree, settlement agreement, judgment, order, directive or binding policy issued
by or entered into with a Governmental Entity pertaining or relating to: (a) pollution or
pollution control, including, without limitation, storm water; (b) protection of human health from
exposure to Hazardous Materials or protection of the environment; (c) employee safety in the
workplace; or (d) the management, presence, use, generation, processing, extraction, treatment,
recycling, refining, reclamation, labeling, transport, storage, collection, distribution, disposal
or release or threat of release of Hazardous Materials. “Environmental Laws” shall include,
without limitation, the Comprehensive Environmental Response, Compensation, and Liability Act, 42
U.S.C. § 9601 et seq., the Solid Waste Disposal Act (as amended by the
Resource Conservation and Recovery Act), 42 U.S.C. § 6901 et seq., the Hazardous Materials
Transportation Act, 49 U.S.C. § 1801 et seq., the Toxic Substances Control Act, 15 U.S.C. § 2601 et
seq., the Federal Water Pollution Control Act, 33 U.S.C. § 1251 et seq., the Federal Safe Drinking
Water Act, 42 U.S.C. §§ 300f-300, the Federal Air Pollution Control Act, 42 U.S.C. § 7401 et seq.,
the Oil Pollution Act, 33 U.S.C. § 2701 et seq., the Occupational Safety and Health Act, 29 U.S.C.
§ 651 et seq., the Endangered Species Act, and the regulations and orders respectively promulgated
thereunder, each as amended, or any equivalent or analogous state or local statutes, laws or
ordinances, any regulation promulgated thereunder and any amendments thereto.

     “Governmental Entity” means any national, state, local, native or tribal government or any
subdivision, agency, court, commission, department, board, bureau, regulatory authority or other
division or instrumentality thereof.

     “Hazardous Materials” shall mean, without limitation, any waste, substance, product, or other
material (whether solid, liquid, gas or mixed), which is or becomes identified, listed, published,
or defined as a hazardous substance, hazardous waste, hazardous material, toxic substance,
radioactive material, oil, or petroleum waste, or which is otherwise regulated or restricted under
any Environmental Law.

     “Plugging and Abandonment Obligations” means any and all responsibility and liability for the
following, arising out of or relating to the Assets, whether before, on, or after the Effective
Time: (i) the necessary and proper plugging, replugging, and abandonment of all Wells; (ii) the
necessary and proper removal, abandonment, and disposal of all structures, pipelines, equipment,
operating inventory, abandoned property, trash, refuse, and junk located on or comprising part of
the Assets; (iii) the necessary and proper capping and burying of all

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associated flow lines located
on or comprising part of the Assets; and (iv) the necessary and proper restoration of the surface
and subsurface to the condition required by applicable laws, permits, orders, and contracts.

     “Remediation” or “Remediate” means investigation, assessment, characterization, delineation,
monitoring, sampling, analysis, removal action, remedial action, response action, corrective
action, mitigation, treatment or cleanup of Hazardous Materials or other similar actions as
required by any applicable Environmental Laws from soil, land surface, groundwater, sediment,
surface water, or subsurface strata or otherwise for the general protection of human health and the
environment.

     5.2 Environmental Representation and Warranty. For the period of Seller’s ownership of
the Assets, Seller represents and warrants to Buyer that to Seller’s Knowledge, Seller has not
received a written notice of a material violation of an Environmental Law with respect to the
Assets.

     5.3 Environmental Liabilities and Obligations.

          (a) Seller’s Environmental Liabilities. Upon Closing, Seller agrees to retain and
pay, perform, fulfill and discharge all claims, cost, expenses, liabilities and obligations
accruing or relating to and release Buyer (but no other third parties) from all Losses (as defined
in Section 14.3) (including any civil fines, penalties, costs of Remediation and expenses for
the modification, repair or replacement of facilities on the Lands) brought or assessed by any and
all persons, including any Governmental Entity, as a result of any personal injury, illness or
death, any damage to, destruction or loss of property, and any damage to natural resources
(including soil, air, surface water or groundwater) to the extent any of the foregoing directly or
indirectly is caused by or otherwise involves any Condition relating to the Assets and attributable
to periods of time prior to May 1, 2010 (the Effective Time of the Prior Purchase Agreement) that
Seller had ownership of the Assets, excluding any Plugging and Abandonment Liabilities
(collectively, “Seller’s Environmental Liabilities”).

          (b) Buyer’s Environmental Liabilities. Upon Closing, Buyer agrees to assume and pay,
perform, fulfill and discharge all claims, costs, expenses, liabilities and obligations accruing or
relating to and release Seller, its stockholders, directors, officers, employees, agents and
representatives, and their respective successors and assigns (but no other third parties) from all
Losses (including any civil fines, penalties, costs of assessment, clean-up, removal and
Remediation, and expenses for the modification, repair or replacement of facilities on the Lands)
brought or assessed by any and all persons, including any Governmental Entity, as a result of any
personal injury, illness or death, any damage to, destruction or loss of property, and any damage
to natural resources (including soil, air, surface water or groundwater) to the extent any of the
foregoing directly or indirectly involves any Condition relating to the Assets, including Plugging
and Abandonment Obligations, but excluding Seller’s Environmental Liabilities (collectively,
“Buyer’s Environmental Liabilities”).

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ARTICLE 6

SELLER’S REPRESENTATIONS AND WARRANTIES

     Seller makes the following representations and warranties as of Closing except where otherwise
indicated. The term “Seller’s Knowledge” has the meaning set forth in Section 15.11(a). The term
“Material Adverse Effect” shall mean any change, development, or effect (individually or in the
aggregate) which is, or is reasonably likely to be, materially adverse to the Assets, as a whole,
or with respect to any Asset, as the context may require.

     6.1 Status. Seller is a corporation duly organized, validly existing and in good standing
under the laws of the State of Delaware and is qualified to carry on its business in such other
jurisdictions as may be necessary.

     6.2 Power. Seller has all requisite corporate power and authority to carry on its
business as presently conducted, to enter into this Agreement, and to perform its obligations
hereunder. The execution and delivery of this Agreement does not, and the performance of Seller’s
obligations hereunder will not, as of Closing, violate, or be in conflict with, any material
provision of Seller’s governing documents, or any judgment, decree, order, statute, rule or
regulation applicable to Seller.

     6.3 Authorization and Enforceability. This Agreement constitutes Seller’s legal, valid
and binding obligation, enforceable in accordance with its terms, subject, however, to the effects
of bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer and other laws for the
protection of creditors, as well as to general principles of equity, regardless whether such
enforceability is considered in a proceeding in equity or at law.

     6.4 Liability for Brokers’ Fees. Seller has not incurred any liability, contingent or
otherwise, for investment bankers’, brokers’ or finders’ fees relating to the transactions
contemplated by this Agreement for which Buyer shall have any responsibility whatsoever.

     6.5 No Bankruptcy. The Purchase Price and terms and conditions of this Agreement
constitute reasonably equivalent value in exchange for the Assets, and Seller is not transferring
the Assets with any intent to hinder, delay or defraud any entity to which Seller is indebted.
There are no bankruptcy proceedings pending, being contemplated by or, to the Knowledge of Seller,
threatened against Seller.

     6.6 Litigation. Except as provided on Schedule 6.6, there are no actions, suits or proceedings
pending or, to the Knowledge of Seller, threatened, against the Seller or any of the Assets in the
future, in any court or by or before any federal, state, municipal or other governmental agency
that has arisen on or after May 1, 2010 and that would have a Material Adverse Effect on the Seller
or the Assets or impair Seller’s ability to consummate the transactions contemplated hereby; nor is
Seller in default under any material order, writ, injunction, or decree of any court or federal,
state, municipal or other governmental agency, that has been issued on or after May 1, 2010.

     6.7 Material Agreements. Except for the Leases, Exhibit C sets forth all of the
following contracts (the “Material Agreements”) which are included in the Assets or by which any of
the Assets will be bound following the Closing: (a) any agreement with any affiliate of

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Seller; (b)
any agreement or contract for the sale, exchange, or other disposition of Hydrocarbons produced
from or attributable to Seller’s interest in the Assets or for the purchase, processing or
transportation of any Hydrocarbons, in each case that is not cancelable without penalty or other
payment on not more than ninety (90) days prior written notice, other than terms of operating
agreements or gas balancing agreements which permit an operator or other co owner to take or market
production of a non taking co owner; (c) any agreement of or binding upon Seller to sell, lease,
farmout, or otherwise dispose of any interest in any of the Assets after the date hereof, other
than non consent penalties for nonparticipation in operations under operating agreements,
conventional rights of reassignment arising in connection with Seller’s surrender or release of any
of the Assets; (d) any tax partnership agreement of or binding upon Seller affecting any of the
Assets; (e) any agreement which creates any area of mutual interest or similar provision with
respect to the acquisition by Seller or its assigns of any interest in any Hydrocarbons, land or
asset or contains any restrictions on the ability of Seller or its assigns to compete with any
other individual or entity, including, without limitation, any corporation, limited liability
company, partnership (general or limited), joint venture, association, joint stock company, trust,
unincorporated organization or government (including any board, agency, political subdivision or
other body thereof) (“Person”); (f) any agreement (other than joint operating agreements, unit
operating agreements and similar agreements) that could reasonably be expected to result in
aggregate payments by Seller with respect to the Assets in excess of Fifty Thousand Dollars
($50,000) during the current or any subsequent year; or (g) any agreement that could reasonably be
expected to result in aggregate revenues to Seller with respect to the Assets in excess of Fifty
Thousand Dollars ($50,000) during the current or any subsequent year. To Seller’s Knowledge,
Seller is not (and to Seller’s Knowledge, no other Person is) in material default (or with the
giving of notice or the lapse of time or both, would not be in default) under any Material
Agreement arising on or after May 1, 2010, except as disclosed on Exhibit C. Prior to
execution of this Agreement, Seller has provided Buyer or made available to Buyer, true, correct
and complete copies of the Material Agreements. To Seller’s Knowledge, the Material Agreements are
in full force and effect in accordance with their terms, and valid and binding obligation of the
Seller, and to the Seller’s Knowledge, each of the other parties thereto, and enforceable in
accordance with its terms, except as may be limited by bankruptcy, insolvency, reorganization,
moratorium and similar laws affecting creditor’s rights generally and by equitable principles.

     6.8 Taxes and Assessments. Except as set forth on Schedule 6.8, to Seller’s
Knowledge, all material taxes and assessments pertaining to the Assets based on or measured by
the ownership of property for all taxable periods after May 1, 2010 that were required to be
paid prior to the Effective Time, have been properly paid. To Seller’s Knowledge, all income taxes
and obligations relating thereto that could result in a lien or other claim against any of the
Assets have been properly paid, unless contested in good-faith by appropriate actions. Since May
1, 2010, Seller has not received written notice nor has Knowledge of any pending claim or audit
against Seller from any applicable taxing authority for assessment of taxes with respect to the
Assets.

     6.9 Judgments. There are no unsatisfied judgments or injunctions issued by a court of
competent jurisdiction or other governmental agency outstanding against Seller related to the
Assets that were entered on or after May 1, 2010.

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     6.10 Lease Status/Rentals/Royalties/Taxes. To Seller’s Knowledge, (i) there are no
currently pending requests or demands for payments, adjustments of payments or performance pursuant
to obligations under the Leases arising on or after May 1, 2010, to the extent that non-compliance
with the forgoing by Seller would have a Material Adverse Effect on any of the Assets and (ii)
since May 1, 2010, Seller has not received a written notice of default with respect to the payment
or calculation of any material amount of any rentals, royalties and/or Production Taxes
attributable to the Assets.

     6.11 Calls on Production. Except as set forth on Schedule 6.11, since May 1,
2010, Seller has not (i) received any material advance, “take-or-pay” or other similar payments
under production sales contracts that entitle the purchasers to “make up” or otherwise receive
deliveries of Hydrocarbons without paying at such time the contract price therefore or (ii) taken
or received any amount of Hydrocarbons under any gas balancing agreements or any similar
arrangements not accounted for in a purchase price adjustment that permit any person thereafter to
receive any portion of the interest of Seller to “balance” any disproportionate allocation of
Hydrocarbons. Except as set forth on Schedule 6.11, no Hydrocarbons attributable to the
Assets are subject to a sales contract entered in to on or after May 1, 2010 (other than contracts
terminable on no more than thirty (30) days’ notice) and no person has any call upon, option to
purchase or similar rights with respect to the production from the Assets under any contract
entered into on or after May 1, 2010; production from the Assets is not bound by any gas
dedications or subject to any monetary or in kind through-put fees or charges in connection with
gathering or transportation under any contract entered into on or after May 1, 2010; and the Assets
are not bound by futures, hedge, swap, collar, put, call, floor, cap, option or other contracts
entered into on or after May 1, 2010 that are intended to benefit from, relate to or reduce or
eliminate the risk of fluctuations in the price of commodities, including Hydrocarbons, securities,
foreign exchange rates or interest rates that will continue after Closing.

ARTICLE 7

BUYER’S REPRESENTATIONS AND WARRANTIES

     Buyer makes the following representations and warranties as of Closing and as of the Effective
Time. The term “Buyer’s Knowledge” has the meaning set forth in Section 15.11(b).

     7.1 Organization and Standing. Buyer is a limited liability company corporation duly organized, validly existing and in
good standing under the laws of Delaware and is duly qualified to carry on its business in such
other jurisdictions as may be necessary.

     7.2 Power. Buyer has all requisite power and authority to carry on its business as
presently conducted. The execution and delivery of this Agreement does not, and the fulfillment of
and compliance with the terms and conditions hereof will not, as of Closing, violate, or be in
conflict with, any material provision of Buyer’s governing documents, or, to the Buyer’s Knowledge,
any judgment, decree, order, statute, rule or regulation applicable to Buyer.

     7.3 Authorization and Enforceability. This Agreement constitutes Buyer’s legal, valid and
binding obligation, enforceable in accordance with its terms, subject, however, to the effects of
bankruptcy, insolvency, reorganization, moratorium and other laws for the protection

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of creditors,
as well as to general principles of equity, regardless whether such enforceability is considered in
a proceeding in equity or at law.

     7.4 Liability for Brokers’ Fees. Buyer has not incurred any liability, contingent or
otherwise, for investment bankers’, brokers’ or finders’ fees relating to the transactions
contemplated by this Agreement for which Seller shall have any responsibility whatsoever.

     7.5 Litigation. There is no action, suit, proceeding, claim or investigation by any
person, entity, administrative agency or governmental body pending or, to Buyer’s Knowledge,
threatened against it before any governmental authority that impedes or is likely to impede its
ability to consummate the transactions contemplated by this Agreement and to assume the liabilities
to be assumed by it under this Agreement.

     7.6 Financial Resources. Buyer has the financial resources available to close the
transaction contemplated by this Agreement without the need to obtain financing.

     7.7 Buyer’s Evaluation.

          (a) Review. Buyer is experienced and knowledgeable in the oil and gas business and is
aware of its risks. Buyer has been afforded the opportunity to examine the Records and materials
made available to it by Seller in Seller’s offices with respect to the Assets. Buyer acknowledges
that Seller has not made any representations or warranties as to the Records or otherwise except as
expressly and specifically provided herein and that Buyer may not rely on any of Seller’s estimates
with respect to reserves, the value of the Assets, projections as to future events or other
internal analyses or forward looking statements.

          (b) Independent Evaluation. In entering into this Agreement, Buyer acknowledges and
affirms that it has relied and will rely solely on the terms of this Agreement and upon its
independent analysis, evaluation and investigation of, and judgment with respect to, the business,
economic, legal, tax or other consequences of this transaction including without limitation its own
estimate and appraisal of the extent and value of the Hydrocarbon reserves of the Assets.

ARTICLE 8

COVENANTS AND AGREEMENTS

     8.1 Covenants and Agreements of Seller. Seller covenants and agrees with Buyer as
follows:

          (a) Restriction on Operations. Unless Seller obtains the prior written consent of
Buyer to act otherwise, which consent shall not be unreasonably withheld, Seller will use
good-faith efforts within the constraints of the applicable operating agreements and other
applicable agreements not to (i) abandon any part of the Assets (except in the ordinary course of
business or the abandonment of Leases upon the expiration of their respective primary terms or if
not capable of production in paying quantities, provided Seller first notifies Buyer and obtains
consent for the proposed abandonment), (ii) convey or dispose of any part of the Assets (other than
replacement of equipment or sale of Hydrocarbons produced from the Assets in the regular course of
business), (iii) enter into any farm-out, farm-in or other contract affecting the Assets,

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(iv)
consent to letting lapse any insurance now in force with respect to the Assets, or (v) materially
modify or terminate any contract material to the operation of the Assets.

          (b) Status. Seller shall use all reasonable efforts to assure that as of the Closing
Date, Seller will not agree to any material legal or contractual restriction that would prohibit or
materially delay the timely consummation of the transactions contemplated hereby.

          (c) Notices of Claims. Seller shall promptly notify Buyer, if, between the date of
execution of this Agreement and the Closing Date, Seller receives written notice of any claim,
suit, action or other proceeding or written notice of any material default under any material
contracts affecting the Assets, and prompt notice of any event that would have a Material Adverse
Effect on any of the Assets, or the Transaction.

     8.2 Covenants and Agreements of Buyer. Buyer covenants and agrees with Seller as follows:

          (a) Status. Buyer shall use all reasonable efforts to assure that as of the Closing
Date it will not be under any material legal or contractual restriction that would prohibit or
delay the timely consummation of the transaction contemplated hereby.

          (b) Confidentiality. The Parties are currently subject to a Confidentiality Agreement
dated December 31, 2009 that will remain in full force and effect following execution of this
Agreement, and will control in the event of a termination of this Agreement.

     8.3 Covenants and Agreements of the Parties.

          (a) Communication Between the Parties Regarding Breach. If Buyer or Seller develops
information during its due diligence that leads either Party to believe that the other Party has
materially breached a representation or warranty under this Agreement, the non-breaching Party
shall inform the alleged breaching Party in writing of such potential breach as soon as possible,
but in any event, at or prior to Closing.

          (b) Cure Period for Breach. If any Party to this Agreement believes the other Party
has materially breached the terms of this Agreement, the Party who believes the breach has occurred
shall give written notice to the breaching Party of the nature of the breach and give that Party
two (2) business days to cure. Notwithstanding the foregoing, this Section 8.3(b) shall not apply
to breach of the Parties’ obligations at Closing and shall not operate to delay Closing beyond June
30, 2011.

          (c) Casualty Loss. Prior to Closing, if a portion of the Assets is destroyed by fire
or other casualty or if a portion of the Assets is taken or threatened to be taken in condemnation
or under the right of eminent domain (“Casualty Loss”), Buyer shall not be obligated to purchase
such Asset. If Buyer declines to purchase such Asset, the Purchase Price shall be reduced by the
Allocated Value of such Asset. If Buyer elects to purchase such Asset, the Purchase Price shall be
reduced by the estimated cost to repair such Asset (with equipment of similar utility), less all
insurance proceeds which shall be payable to Buyer, up to the Allocated Value thereof (the
reduction being the “Net Casualty Loss”). Seller, at its sole option, may elect to cure such
Casualty Loss and, in such event, Seller shall be entitled to all insurance proceeds.

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If Seller
elects to cure such Casualty Loss, Seller may replace any personal property that is the subject of
a Casualty Loss with equipment of similar grade and utility, or replace any real property with real
property of similar nature and kind if such property is acceptable to Buyer in its sole discretion.
If Seller elects to cure the Casualty Loss, Buyer shall purchase the affected Asset at Closing for
the Allocated Value thereof.

          (d) Cooperation and Good Faith. The Parties agree to cooperate and act in good faith
in carrying out each of its respective obligations hereunder, including the preparation and filing
of any notices, disclosures, reports or other documents that may be necessary to the consummation
of the transaction contemplated by this Agreement.

ARTICLE 9

TAX MATTERS

     9.1 Definitions. For the purposes of this Agreement, the following terms shall have the
following meanings:

          (a) “Code” shall mean the Internal Revenue Code of 1986, as amended.

          (b) “Production Taxes” shall mean all ad valorem, property, production, excise, net proceeds,
severance, windfall profit and all other taxes and similar obligations assessed against the Assets
or based upon or measured by the ownership of the Assets or the production of Hydrocarbons or the
receipt of proceeds therefrom, other than income taxes.

     9.2 Production Tax Liability. Subject to the treatment of ad valorem taxes provided
below, all Production Taxes shall be prorated between Buyer and Seller as of the Effective Date for
all taxable periods that include the Effective Date based upon relative days of ownership of the
Assets during the relevant taxable period. The Parties acknowledge that in certain states, such as
Colorado, ad valorem taxes assessed against the Assets are measured by the value of the preceding
year’s production. Ad valorem taxes shall be the responsibility of the Party who owned the Asset
when the production which is the basis for the tax assessment occurred. By way of illustration, in
Colorado, 2012 ad valorem taxes payable in 2013 are based on the value of 2011 production so shall
be the liability of and shall be paid by the Party with respect to the time that it owned the
Assets in 2011. Each Party shall promptly furnish to the other copies of any ad valorem tax
assessments and tax statements (or invoices therefore from the operator of the Assets) received by
it pertaining to the respective Asset. Each Party shall timely pay all ad valorem taxes for which
it has liability under this Section and shall furnish to the other Party evidence of such payment.

     9.3 Sales Taxes. All sales, use or other taxes (other than taxes on gross income, net
income or gross receipts) and duties, levies, recording fees or other governmental charges incurred
by or imposed with respect to the property transfers undertaken pursuant to this Agreement shall be
the responsibility of, and shall be paid by, Buyer.

     9.4 Tax Reports and Returns. For tax periods in which the Effective Time occurs, Seller
agrees to immediately forward to Buyer copies of any tax reports and returns received by Seller
after Closing and provide Buyer with any information Seller has that is necessary for Buyer to file
any required tax reports and returns related to the Assets. Buyer agrees to file all

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tax returns
and reports applicable to the Assets that Buyer is required to file after the Closing and, subject
to the provisions of Section 9.2, to pay all required Production Taxes payable with respect to the
Assets.

ARTICLE 10

CONDITIONS PRECEDENT TO CLOSING

     10.1 Seller’s Conditions. The obligations of Seller at the Closing are subject, at the
option of Seller, to the satisfaction or waiver at or prior to the Closing of the following
conditions precedent:

          (a) All representations and warranties of Buyer contained in this Agreement are true in all
material respects (except for such representations and warranties that are qualified by materiality
or Material Adverse Effect or words of similar import, which shall be true and correct in all
respects) on the date hereof and as of the Closing Date in accordance with their terms as if such
representations and warranties were remade at and as of the Closing Date, and Buyer has performed
and satisfied all covenants and agreements required by this Agreement to be performed and satisfied
by Buyer or jointly by Buyer and Seller at or prior to the Closing in all material respects and
Buyer shall deliver a certificate to Seller confirming the foregoing; and

          (b) No order has been entered by any court or governmental agency having jurisdiction over the
Parties or the subject matter of this Agreement that restrains or prohibits the purchase and sale
contemplated by this Agreement and that remains in effect at Closing.

     10.2 Buyer’s Conditions. The obligations of Buyer at the Closing are subject, at the
option of Buyer, to the satisfaction or waiver at or prior to the Closing of the following
conditions precedent:

          (a) All representations and warranties of Seller contained in this Agreement are true in all
material respects (except for such representations and warranties that are qualified by materiality
or Material Adverse Effect or words of similar import, which shall be true and correct in all
respects) on the date hereof and as of the Closing Date in accordance with their terms as if such
representations and warranties were remade at and as of the Closing Date and Seller has performed
and satisfied all covenants and agreements required by this Agreement to be performed and satisfied
by Seller or jointly by Buyer or Seller at or prior to the Closing in all material respects and
Seller shall deliver a certificate to Buyer confirming the foregoing; and

          (b) No order has been entered by any court or governmental agency having jurisdiction over the
Parties or the subject matter of this Agreement that restrains or prohibits the purchase and sale
contemplated by this Agreement and that remains in effect at the time of Closing.

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ARTICLE 11

RIGHT OF TERMINATION

     11.1 Termination. This Agreement may be terminated in accordance with the following
provisions:

          (a) by mutual consent of Seller and Buyer;

          (b) by Seller, if Seller’s conditions set forth in Section 10.1 are not satisfied through no
fault of Seller, or are not waived by Seller, as of June 30, 2011;

          (c) by Buyer, if Buyer’s conditions set forth in Section 10.2 are not satisfied through no
fault of Buyer, or are not waived by Buyer, as of June 30, 2011;

          (d) by Seller, if, through no fault of Seller, the Closing does not occur on or before June
30, 2011;

          (e) by Buyer, if, through no fault of Buyer, the Closing does not occur on or before June 30,
2011;

          (f) by Buyer or Seller, if the sum of (i) the Title Defect Amounts (as may be offset by the
Title Benefit Amounts), (ii) the Allocated Value of Affected Assets retained by Seller under
Section 4.4(a) or 4.4(b), and (iii) any Casualty Loss or Net Casualty Loss under Section 8.3(c)
exceeds ten percent (10%) of the Purchase Price in the aggregate.

     11.2 Liabilities Upon Termination.

          (a) Buyer’s Default. If Closing does not occur because Buyer wrongfully failed to
tender performance at Closing, or otherwise breached this Agreement prior to Closing, and all of
the conditions to Closing under Section 10.2 have been satisfied or waived (other than those
conditions involving deliveries at Closing) and Seller is ready to close, Seller shall be entitled
to receive from the Escrow Account as liquidated damages, the Deposit (and all earned interest, if
any, thereon), as Seller’s sole remedy at law and in equity. The Parties agree that the damages
that would be suffered by Seller as a result of Buyer’s breach would be difficult to estimate and
that the liquidated damages described herein represent a reasonable estimation of such damages and
do not constitute a penalty. Buyer’s failure to close shall not be considered wrongful if Buyer
has the right to terminate or has terminated this Agreement as of right under Sections 11.1(c),
11.1(e) or 11.1(f).

          (b) Seller’s Default. If Closing does not occur because Seller wrongfully failed to
tender performance at Closing, or otherwise breached this Agreement prior to Closing, and all of
the conditions to Closing under Section 10.1 have been satisfied or waived (other than those
conditions involving deliveries at Closing) and Buyer is ready to close, Escrow Agent shall
promptly return the Deposit (and all earned interest, if any, thereon) to Buyer and Buyer shall be
entitled to enforce the remedy of specific performance against Seller hereunder, and shall be
entitled to recover from Seller all court costs and attorney’s fees incurred by Buyer, in addition
to any and all other rights and remedies to which Buyer may be entitled at law or in equity.

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Seller’s failure to close shall not be considered wrongful if Seller has the right to terminate or
has terminated this Agreement as of right under Sections 11.1(b), 11.1(d) or 11.1(f).

ARTICLE 12

CLOSING

     12.1 Date of Closing. The “Closing” of the transactions contemplated hereby shall be held
on or before June 30, 2011, or such earlier date as the Parties may mutually agree. The date the
Closing actually occurs shall be the “Closing Date”.

     12.2 Place of Closing. The Closing shall be held at the offices of Seller at 9:00 a.m. or at such other time and
place as Buyer and Seller may agree in writing.

     12.3 Closing Obligations. At Closing, the following events shall occur, each being a
condition precedent to the others and each being deemed to have occurred simultaneously with the
others:

          (a) Seller and Buyer shall execute, acknowledge and deliver to Buyer (i) an Assignment, Bill
of Sale and Conveyance of Assets effective as of the Effective Time substantially in the form of
Exhibit E with a special warranty of title by, through and under Seller but not otherwise
and with no warranties, express or implied, as to the personal property, fixtures or condition of
the Assets which are conveyed “as is, where is”; (ii) such other assignments, bills of sale,
certificates of title, or deeds necessary to transfer the Assets to Buyer including, without
limitation, federal and state forms of assignment; and (iii) an Assignment and Assumption Agreement
in the form attached as Exhibit F under which Seller assigns and Buyer assumes Seller’s
interest in the contracts included in the Assets in accordance with the terms of this Agreement;

          (b) Seller and Buyer shall deliver the certificates required in Sections 10.2(a) and 10.1(a),
respectively.

          (c) Seller and Buyer shall execute and deliver the Preliminary Settlement Statement;

          (d) Buyer shall cause the Closing Amount to be paid by wire transfer of immediately available
funds;

          (e) Seller shall execute, acknowledge and deliver transfer orders or letters in lieu thereof
notifying all purchasers of production of the change in ownership of the Assets and directing all
purchasers of production to make payment to Buyer of proceeds attributable to production from the
Assets;

          (f) Seller shall execute and deliver to Buyer an affidavit of non-foreign status and no
requirement for withholding under Section 1445 of the Code in the form of Exhibit G;

          (g) Seller shall deliver a written release of all of the liens on the Assets from its secured
lender in a form to be approved by the Buyer; and

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          (h) Seller and Buyer shall take such other actions and deliver such other documents as are
contemplated by this Agreement.

ARTICLE 13

POST-CLOSING OBLIGATIONS

     13.1 Post-Closing Adjustments.

          (a) Final Settlement Statements. As soon as practicable after the Closing, but in no
event later than ninety (90) days after Closing, Buyer, with the assistance of Seller’s staff and
with access to such records as necessary, will cause to be prepared and delivered to Seller, in
accordance with customary industry accounting practices, (i) the final settlement statement (the
“Final Settlement Statement”) setting forth each adjustment to the Purchase Price in final form in
accordance with Section 2.3 and showing the calculation of such adjustments and the resulting final
purchase price (the “Final Purchase Price”). As soon as practicable after receipt of the Final
Settlement Statement but in no event later than on or before thirty (30) days after receipt of such
statement, Seller shall deliver to Buyer a written report containing any changes that Seller
proposes to make to the Final Settlement Statement. Seller’s failure to deliver to Buyer a written
report detailing proposed changes to the Final Settlement Statement by that date shall be deemed an
acceptance by Seller of the Final Settlement Statement as submitted by Buyer. The Parties shall
agree with respect to the changes proposed by Seller, if any, no later than forty-five (45) days
after receipt of Buyer’s proposed Final Settlement Statement. The date upon which such agreement
is reached or upon which the Final Purchase Price is established shall be herein called the “Final
Settlement Date.” If the Final Purchase Price is more than the Closing Amount, Buyer shall pay to
Seller the amount of such difference by wire transfer in immediately available funds no later than
five (5) days after the Final Settlement Date. If the Final Purchase Price is less than the
Closing Amount, Seller shall pay the additional amount to Buyer by wire transfer in immediately
available funds no later than five (5) days after the Final Settlement Date.

          (b) Dispute Resolution. If the Parties are unable to resolve a dispute as to the
Final Purchase Price within sixty (60) days after Seller’s receipt of Buyer’s proposed Final
Settlement Statement, the Parties shall submit the dispute to binding arbitration to be conducted
in accordance with the provisions of Section 15.15.

     13.2 Records. Seller shall make the Records available for pick up by Buyer within ten (10)
days after Closing. Seller may retain copies of the Records and Seller shall have the right to
review and copy the Records during standard business hours upon reasonable notice for so long as
Buyer retains the Records. Buyer agrees that the Records will be maintained in compliance with all
applicable laws governing document retention.

     13.3 Further Assurances. From time to time after Closing, Seller and Buyer shall each
execute, acknowledge and deliver to the other such further instruments and take such other action
as may be reasonably requested in order to accomplish more effectively the purposes of the
transactions contemplated by this Agreement, including assurances that Seller and Buyer are
financially capable of performing any indemnification required hereunder.

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ARTICLE 14

ASSUMPTION AND RETENTION OF OBLIGATIONS AND INDEMNIFICATION; DISCLAIMERS

     14.1 Buyer’s Assumption of Liabilities and Obligations. Upon Closing, Buyer shall assume and pay, perform, fulfill and discharge all claims, costs,
expenses, liabilities and obligations (“Obligations”) accruing or relating to the (a) ownership and
operation of the Assets after the Effective Time including owning, developing, exploring, operating
or maintaining the Assets or the producing, transporting and marketing of Hydrocarbons from the
Assets, the payment of Property Expenses, the make-up and balancing obligations for overproduction
of gas from the Wells, and all liability for royalty and overriding royalty payments and Production
Taxes made with respect to the Assets; (b) the Buyer’s Environmental Liabilities; and (c) all
Obligations accruing or relating to the ownership or operation of the Assets before the Effective
Time, including Seller’s Environmental Liabilities, for which Claims have not been asserted
pursuant to Section 14.4 before the end of the Survival Period, expressly provided that the Buyer
will not assume (and the Assumed Liabilities expressly exclude) any litigation listed on
Schedule 6.6 (collectively, the “Assumed Liabilities”).

     14.2 Seller’s Retention of Liabilities and Obligations. Upon Closing Seller shall retain
and pay all Obligations relating to Seller’s ownership and operation of the Assets prior to the
Effective Time, excluding, however, the Assumed Liabilities (collectively, the “Retained
Liabilities”).

     14.3 Indemnification. “Losses” shall mean any actual losses, costs, expenses (including
court costs, reasonable fees and expenses of attorneys, technical experts and expert witnesses and
the cost of investigation), liabilities, damages, demands, suits, claims, and sanctions of every
kind and character (including civil fines) arising from, related to or reasonably incident to
matters indemnified against; excluding however any special, consequential, punitive or exemplary
damages, diminution of value of any Asset, loss of profits incurred by a Party hereto or loss
incurred as a result of the indemnified party indemnifying a third party

     After the Closing, Buyer and Seller shall indemnify each other as follows:

          (a) Seller’s Indemnification of Buyer. Seller assumes all risk, liability, obligation
and Losses in connection with, and shall defend, indemnify, and save and hold harmless Buyer, its
officers, directors, employees and agents, from and against all Losses which arise directly or
indirectly from or in connection with (i) the Retained Liabilities, (ii) any matter for which
Seller has agreed to indemnify Buyer under this Agreement and (iii) any breach by Seller of any of
Seller’s representations, warranties or covenants hereunder.

          (b) Buyer’s Indemnification of Seller. Buyer assumes all risk, liability, obligation
and Losses in connection with, and shall defend, indemnify, and save and hold harmless Seller, its
officers, directors, employees and agents, from and against all Losses which arise directly or
indirectly from or in connection with (i) the Assumed Liabilities, (ii) any matter for which Buyer
has agreed to indemnify Seller under this Agreement and (iii) any breach by Buyer of any of Buyer’s
representations, warranties or covenants hereunder.

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          (c) Limitations on Indemnity. Notwithstanding anything to the contrary set forth
herein, Seller shall have no liability for indemnification hereunder pursuant to Section
14.3(a)(iii) or for any Losses arising in connection with or with respect to Section 14.3(a)(i) or
(ii) until the total of all Losses with respect to such matters exceed one (1%) percent of the
Purchase Price (the “Deductible”). The aggregate liability of Seller for indemnification with
respect to Losses suffered by the Buyer shall not exceed forty (40%) percent of the Purchase Price
(the “Cap”). Notwithstanding the above, the Deductible and the Cap will not apply to a breach of
the Fundamental Representations. From and after the Closing, except as otherwise expressly
provided hereunder, indemnification under Section 14.4 shall be the sole and exclusive remedy
available to any Party hereto against any other Party hereto for any claims arising out of or based
upon the matters set forth in this Agreement and the transactions contemplated hereby, and no Party
shall seek relief against any other Party to this Agreement other than through indemnification
provided in Section 14.4, subject to the limitations provided for in this Section 14.3(c); provided
however, that nothing herein shall limit the nonmonetary equitable remedies of any Party with
respect to any breach of any covenant or other agreement required to be performed after Closing.

     14.4 Procedure. The indemnifications contained in Section 14.4 shall be implemented as
follows:

          (a) Claim Notice. The Party seeking indemnification under the terms of this Agreement
(“Indemnified Party”) shall submit a written notice (a “Claim Notice”) to the other Party
(“Indemnifying Party”) which, to be effective, must be delivered prior to the end of the Survival
Period and must state: (i) the amount of each payment claimed by an Indemnified Party to be owing,
(ii) the basis for such claim, with supporting documentation, and (iii) a list identifying to the
extent reasonably possible each separate item of Loss for which payment is so claimed. The amount
claimed shall be paid by the Indemnifying Party to the extent required herein within thirty (30)
days after receipt of the Claim Notice, or after the amount of such payment has been finally
established, whichever last occurs.

          (b) Information. Promptly after the Indemnified Party receives notice of a claim or
legal action by a third party that may result in a Loss for which indemnification may be sought
under this Article 14 (a “Claim”), the Indemnified Party shall give written notice of such Claim to
the Indemnifying Party. If the Indemnifying Party or its counsel so requests, the Indemnified
Party shall furnish the Indemnifying Party with copies of all pleadings and other information with
respect to such Claim. At the election of the Indemnifying Party made within sixty (60) days after
receipt of such notice, the Indemnified Party shall permit the Indemnifying Party to assume control
of such Claim (to the extent only that such Claim, legal action or other matter relates to a Loss
for which the Indemnifying Party is liable), including the determination of all appropriate
actions, the negotiation of settlements on behalf of the Indemnified Party, and the conduct of
litigation through attorneys of the Indemnifying Party’s choice; provided, however, that no such
settlement can result in any liability or cost to the Indemnified Party for which it is entitled to
be indemnified hereunder without its consent. If the Indemnifying Party elects to assume control,
(i) any expense incurred by the Indemnified Party thereafter for investigation or defense of the
matter shall be borne by the Indemnified Party, and (ii) the Indemnified Party shall give all
reasonable information and assistance, other than pecuniary, that the Indemnifying Party shall deem
necessary to the proper defense of such Claim, legal action, or

-27-

 

other matter. In the absence of
such an election, the Indemnified Party will use its best efforts to defend, at the Indemnifying
Party’s expense, any claim, legal action or other matter to which
such other Party’s indemnification under this Article 14 applies until the Indemnifying Party
assumes such defense, and, if the Indemnifying Party fails to assume such defense within the time
period provided above, settle the same in the Indemnified Party’s reasonable discretion at the
Indemnifying Party’s expense with the Indemnifying Party’s consent which shall not be unreasonably
withheld. If such a Claim requires immediate action, both the Indemnified Party and the
Indemnifying Party will cooperate in good faith to take appropriate action so as not to jeopardize
defense of such Claim or either Party’s position with respect to such Claim. If the Indemnifying
Party is entitled to, and does, assume the defense of any such Claim, the Indemnified Party shall
have the right to employ separate counsel at its own expense and to participate in the defense
thereof; provided, however, that notwithstanding the foregoing, the Indemnifying Party shall pay
the reasonable attorneys’ fees of the Indemnified Party if the Indemnified Party’s counsel shall
have advised the Indemnified Party that there is a conflict of interest that could make it
inappropriate under applicable standards of professional conduct to have common counsel for the
Indemnifying Party and the Indemnified Party (provided that the Indemnifying Party shall not be
responsible for paying for more than one separate firm of attorneys and one local counsel to
represent all of the Indemnified Parties subject to such Claim).

     14.5 No Insurance; Subrogation. The indemnifications provided in this Article 14 shall not
be construed as a form of insurance. Buyer and Seller hereby waive for themselves, their
successors or assigns, including, without limitation, any insurers, any rights to subrogation for
Losses for which each of them is respectively liable or against which each respectively indemnifies
the other, and, if required by applicable policies, Buyer and Seller shall obtain waiver of such
subrogation from its respective insurers.

     14.6 Reservation as to Non-Parties. Nothing herein is intended to limit or otherwise waive
any recourse Buyer or Seller may have against any non-party for any obligations or liabilities that
may be incurred with respect to the Assets.

     14.7 Disclaimers.

          (a) EXCEPT FOR SELLER’S EXPRESS REPRESENTATIONS AND WARRANTIES CONTAINED IN ARTICLE 6 ABOVE,
AND SELLER’S SPECIAL WARRANTY OF TITLE IN THE ASSIGNMENT DOCUMENTS, THE PROPERTIES ARE BEING
CONVEYED BY SELLER TO BUYER WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED, STATUTORY, COMMON LAW
OR OTHERWISE, AND THE PARTIES HEREBY EXPRESSLY DISCLAIM, WAIVE AND RELEASE ANY EXPRESS WARRANTY OF
MERCHANTABILITY, CONDITION OR SAFETY AND ANY EXPRESSED WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE; AND BUYER ACCEPTS THE PROPERTIES, “AS IS, WHERE IS, WITH ALL FAULTS, WITHOUT RECOURSE.”
ALL DESCRIPTIONS OF THE WELLS, EQUIPMENT, FACILITIES, PERSONAL PROPERTY, FIXTURES AND STRUCTURES
HERETOFORE OR
HEREAFTER FURNISHED TO BUYER BY SELLER HAVE BEEN AND SHALL BE FURNISHED SOLELY FOR BUYER’S
CONVENIENCE, AND HAVE NOT CONSTITUTED AND SHALL NOT CONSTITUTE A REPRESENTATION OR WARRANTY OF ANY
KIND BY SELLER. SELLER SHALL HAVE NO LIABILITY TO BUYER FOR ANY CLAIMS,

-28-

 

LOSS OR DAMAGE CAUSED OR
ALLEGED TO BE CAUSED DIRECTLY OR INDIRECTLY, INCIDENTALLY OR CONSEQUENTIALLY, BY SUCH WELLS,
EQUIPMENT, FACILITIES, PERSONAL PROPERTY, FIXTURES AND STRUCTURES, BY ANY INADEQUACY THEREOF OR
THEREWITH, ARISING IN STRICT LIABILITY OR OTHERWISE, OR IN ANY WAY ARISING OUT OF BUYER’S PURCHASE
THEREOF. BUYER EXPRESSLY WAIVES THE WARRANTY OF FITNESS AND THE WARRANTY AGAINST VICES AND DEFECTS,
WHETHER APPARENT OR LATENT, IMPOSED BY ANY APPLICABLE STATE OR FEDERAL LAW. THE PARTIES HEREBY
ACKNOWLEDGE AND AGREE THAT, TO THE EXTENT REQUIRED BY APPLICABLE LAW, THE DISCLAIMERS CONTAINED IN
THIS AGREEMENT ARE “CONSPICUOUS” FOR THE PURPOSES OF SUCH APPLICABLE LAW.

          (b) SELLER HEREBY EXPRESSLY DISCLAIMS AND NEGATES ANY IMPLIED OR EXPRESS WARRANTY AT COMMON
LAW, BY STATUTE OR OTHERWISE RELATING TO THE ACCURACY OF ANY OF THE INFORMATION FURNISHED WITH
RESPECT TO THE EXISTENCE OR EXTENT OF RESERVES OR THE VALUE OF THE PROPERTIES BASED THEREON OR THE
CONDITION OR STATE OF REPAIR OF ANY OF THE PROPERTIES; THIS DISCLAIMER AND DENIAL OF WARRANTY ALSO
EXTENDS TO ANY EXPRESS OR IMPLIED REPRESENTATION OR WARRANTY AS TO THE PRICES BUYER AND SELLER ARE
OR WILL BE ENTITLED TO RECEIVE FROM PRODUCTION OF OIL, GAS OR OTHER SUBSTANCES FROM THE PROPERTIES,
IT BEING ACKNOWLEDGED, AGREED AND EXPRESSLY UNDERSTOOD THAT ALL RESERVE, PRICE AND VALUE ESTIMATES
UPON WHICH BUYER HAS RELIED OR IS RELYING HAVE BEEN DERIVED BY THE INDIVIDUAL AND INDEPENDENT
EVALUATION OF BUYER. BUYER ALSO STIPULATES, ACKNOWLEDGES AND AGREES THAT RESERVE REPORTS ARE ONLY
ESTIMATES OF PROJECTED FUTURE OIL AND/OR GAS VOLUMES, FUTURE FINDING COSTS AND FUTURE OIL AND/ GAS
SALES PRICES, ALL OF WHICH FACTORS ARE INHERENTLY IMPOSSIBLE TO PREDICT ACCURATELY EVEN WITH ALL
AVAILABLE DATA AND INFORMATION.

ARTICLE 15

MISCELLANEOUS

     15.1 Schedules. The Schedules to in this Agreement are hereby incorporated in this
Agreement by reference and constitute a part of this Agreement.

     15.2 Expenses. Except as otherwise specifically provided, all fees, costs and expenses
incurred by Buyer or Seller in negotiating this Agreement or in consummating the transactions
contemplated
by this Agreement shall be paid by the Party incurring the same, including, without
limitation, engineering, land, title, legal and accounting fees, costs and expenses.

     15.3 Notices. All notices and communications required or permitted under this Agreement
shall be in writing and addressed as set forth below. Any communication or delivery hereunder
shall be deemed to have been duly made and the receiving Party charged with notice (i) if
personally delivered, when received, (ii) if sent by telecopy or facsimile transmission, when
received, (iii) if mailed, five (5) business days after mailing, certified mail, return receipt

-29-

 

requested, or (iv) if sent by overnight courier, one day after sending. All notices shall be
addressed as follows:

If to Seller:

Delta Petroleum Corporation

370 17th Street, Suite 4300

Denver, CO 80202

Attn: Ted Freedman

Telephone: (303) 575-0349

Fax: (303) 293-0066

If to Buyer:

Wapiti Oil & Gas, L.L.C.

800 Gessner, Suite 700

Houston, Texas 77024

Attn: Bart Agee

Telephone: 713-365-8500

Fax: 713-365-8511

     Any Party may, by written notice so delivered to the other parties, change the address or
individual to which delivery shall thereafter be made.

     15.4 Amendments. Except for waivers specifically provided for in this Agreement, this
Agreement may not be amended nor any rights hereunder waived except by an instrument in writing
signed by the Party to be charged with such amendment or waiver and delivered by such Party to the
Party claiming the benefit of such amendment or waiver.

     15.5 Assignment. Buyer shall not assign all or any portion of its respective rights or
delegate all or any portion of its respective duties hereunder without the written consent of
Seller, which consent shall not be unreasonably withheld, expressly provided that the Buyer may
assign all or any portion of this Agreement or any portion of the Assets to an entity wholly owned
or controlled by the Buyer.

     15.6 Headings. The headings of the Articles and Sections of this Agreement are for guidance and
convenience of reference only and shall not limit or otherwise affect any of the terms or
provisions of this Agreement.

     15.7 Counterparts/Fax Signatures. This Agreement may be executed and delivered in one or
more counterparts, each of which when executed and delivered shall be an original, and all of which
when executed shall constitute one and the same instrument. The exchange of copies of this
Agreement and of signature pages by facsimile or by electronic image scan transmission in .pdf
format shall constitute effective execution and delivery of this Agreement as to the Parties and
may be used in lieu of the original Agreement for all purposes. Signatures of the Parties
transmitted by facsimile or electronic image scan transmission in .pdf format shall be deemed to be
their original signatures for all purposes. Any Party that delivers an executed counterpart
signature page by facsimile or by electronic scan transmission in .pdf format shall

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promptly
thereafter deliver a manually executed counterpart signature page to each of the other Parties;
provided, however, that the failure to do so shall not affect the validity, enforceability, or
binding effect of this Agreement.

     15.8 References. References made in this Agreement, including use of a pronoun, shall be
deemed to include where applicable, masculine, feminine, singular or plural, individuals or
entities. As used in this Agreement, “person” shall mean any natural person, corporation,
partnership, trust, limited liability company, court, agency, government, board, commission, estate
or other entity or authority. The words “include,” “includes,” and “including” are deemed to be
followed by “without limitation” whether or not they are in fact followed by such words or words of
similar import.

     15.9 Governing Law. This Agreement and the transactions contemplated hereby and any
arbitration or dispute resolution conducted pursuant hereto shall be construed in accordance with,
and governed by, the laws of the State of Texas, without regards to conflicts of laws principles.

     15.10 Entire Agreement. This Agreement, along with the Confidentiality Agreement executed
between the Parties dated December 31, 2009, constitutes the entire understanding among the
Parties, their respective partners, members, trustees, shareholders, officers, directors and
employees with respect to the subject matter hereof, superseding all negotiations, prior
discussions and prior agreements and understandings relating to such subject matter.

     15.11 Knowledge.

          (a) “Seller’s Knowledge” means the actual knowledge of the Seller’s representatives listed on
Schedule 15.11(a) hereto.

          (b) “Buyer’s Knowledge” means the actual knowledge of the Buyer’s representatives listed on
Schedule 15.11(b) hereto.

     15.12 Binding Effect. This Agreement shall be binding upon, and shall inure to the benefit
of, the Parties hereto, and their respective successors and assigns. Notwithstanding anything to
the contrary herein, this Agreement is not a binding agreement between the Parties hereto unless
and until this Agreement is duly executed in writing by representatives of the Parties and
delivered by the Parties.

     15.13 Survival of Warranties, Representations and Covenants. All representations and
warranties, covenants, indemnities and performance obligations in this Agreement shall survive the
Closing and remain in full force and effect until August 30, 2011 at 5:00 p.m., Houston, Texas time
(“Survival Period”), except for those representations and warranties set forth in Sections 6.1,
6.2, 6.3 with respect to the Seller, or Sections 7.1, 7.2 or 7.3 with respect to the Buyer, which
representations will survive indefinitely (the “Fundamental Representations”). If a Claim Notice
has been properly delivered before the date any representation, warranty, covenant, or performance
obligation would otherwise expire under this Section alleging a right to indemnification or defense
for Losses arising out, relating to, or attributable to the breach of such representation,
warranty, covenant, or performance obligation, such representation, warranty, covenant, or
performance obligation shall continue to survive until the claims asserted in such

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Claim Notice
that are based on the breach of such representation, warranty, covenant, or performance obligation
have been fully and finally resolved under the terms of this Agreement or by agreement (including
a settlement agreement) of the Parties. The Parties hereby agree to waive any claims of
indemnification they may have against each other in connection with the Prior Purchase Agreement.

     15.14 No Third-Party Beneficiaries. This Agreement is intended only to benefit the Parties
hereto and their respective permitted successors and assigns.

     15.15 Dispute Resolution and Arbitration. Unless this Agreement specifically requires the
Parties to arbitrate a specific matter hereunder, the Parties have all of the rights that they
would have under law and equity with respect to any dispute hereunder. If this Agreement
specifically requires arbitration, the following provisions shall apply to any arbitration
conducted pursuant to this Agreement:

          (a) Within ten (10) days after written demand by either Party for arbitration, the Parties
shall select a single, independent arbitrator as described in Section 4.3 with respect to Title
Disputed Matter, and Section 13.1(b) with respect to the Final Settlement Statement. As to
disputes involving Title Disputed Matters pursuant to Section 4.3, the list of arbitrators shall be
qualified by education, knowledge and experience with title defects affecting the types of
properties which are subject to the disputed Title Defect and have a minimum of ten years
experience with such types of defects and properties. If the Parties cannot agree on the selection
of such arbitrator, then the arbitrator shall be selected from the list by the Judicial Arbiter
Group.

          (b) The arbitration shall be governed by Texas law but the specific procedure to be followed
shall be determined by the arbitrator. It is the intent of the Parties that the arbitration be
conducted as efficiently and inexpensively as possible, with only limited discovery as determined
by the arbitrator without regard to the discovery permitted under the Texas or Federal Rules of
Civil Procedure.

          (c) The arbitration proceeding shall be held in Houston, Texas , and a hearing shall be held
no later than sixty (60) days after submission of the matter to arbitration, and a written decision
shall be rendered by the arbitrators within thirty (30) days of the hearing.

          (d) At the hearing, the Parties shall present such evidence and witnesses as they may choose,
with or without counsel. Adherence to formal rules of evidence shall not be required but the
arbitrator shall consider any evidence and testimony that he or she determines to be relevant, in
accordance with procedures that it determines to be appropriate.

          (e) Any award entered in the arbitration shall be made by a written opinion stating the
reasons and basis for the award made.

          (f) The costs incurred in employing the arbitrators, including the arbitrators’ retention of
any independent qualified experts, shall be borne 50% by the Seller and 50% by Buyer.

          (g) The arbitrator’s award may be filed in any court of competent jurisdiction and may be
enforced by any Party as a final judgment of such court.

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     IN WITNESS WHEREOF, the Parties hereto have duly executed this Agreement as of the day and
year first above written.

	 	 	 	 	 
	 	SELLER:

DELTA PETROLEUM CORPORATION

 	 
	 	By:  	/s/ Carl Lakey
 	 
	 	 	Carl Lakey, Chief Executive Officer 	 
	 	 	 	 
	 
	 	BUYER:

WAPITI OIL & GAS, L.L.C.

 	 
	 	By:  	/s/ Ryan O’Shaugnessy
 	 
	 	 	Ryan O’Shaughnessy, Senior Vice President 	 
	 	 	 	 
	 

-33-exv10w1

Exhibit
10.1

Execution Copy

SUPPORT AGREEMENT

     This SUPPORT AGREEMENT, dated as of June 15, 2011 (this “Agreement”), is by and among
Energy Transfer Equity, L.P., a Delaware limited partnership (“Parent”), Sigma Acquisition
Corporation, a Delaware corporation and direct wholly owned subsidiary of Parent (“Merger
Sub,” and together with Parent, the “Parent Parties”), George L. Lindemann, Dr. Frayda
B. Lindemann, George L. Lindemann, Jr., Adam M. Lindemann, Sloan Lindemann Barnett, and Eric D.
Herschmann (the “Stockholders”).

RECITALS:

     WHEREAS, concurrently with the execution of this Agreement, the Parent Parties and Southern
Union Company, a Delaware corporation (the “Company”), are entering into an Agreement and
Plan of Merger, dated as of the date hereof (as amended, supplemented, restated or otherwise
modified from time to time, the “Merger Agreement”), pursuant to which, among other things,
Merger Sub will merge with and into the Company (the “Merger”), with the Company as the
surviving entity, and each share of common stock of the Company (“Company Common Stock”)
will be converted into the right to receive the merger consideration specified therein; and

     WHEREAS, as of the date hereof, each Stockholder is the record and beneficial owner in the
aggregate of, and has the right to vote and dispose of, the number of shares of Company Common
Stock set forth opposite such Stockholder’s name on Schedule I hereto; and

     WHEREAS, as a material inducement to the Parent Parties to enter into the Merger Agreement,
the Parent Parties have required that the Stockholders agree, and each Stockholder has agreed, to
enter into this agreement and abide by the covenants and obligations with respect to the Covered
Shares (as hereinafter defined) set forth herein.

     NOW THEREFORE, in consideration of the foregoing and the mutual representations, warranties,
covenants and agreements herein contained, and intending to be legally bound hereby, the parties
hereto agree as follows:

ARTICLE 1

GENERAL

     Section 1.1 Defined Terms. The following capitalized terms, as used in this
Agreement, shall have the meanings set forth below. Capitalized terms used but not otherwise
defined herein shall have the meanings ascribed thereto in the Merger Agreement.

     “Company Entity” means each of the Company and its Subsidiaries.

     “Covered Shares” means, with respect to each Stockholder, such Stockholder’s Existing
Shares, together with any shares of Company Common Stock that such Stockholder acquires, either
beneficially or of record, on or after the date hereof, including any shares of Company Common
Stock received as dividends, as a result of a split, reverse split, combination, merger,
consolidation, reorganization, reclassification, recapitalization or similar transaction or upon

- 1 -

 

exercise of any option, warrant or other security or instrument exercisable, convertible or
exchangeable into shares of Company Common Stock.

     “Existing Shares” means, with respect to each Stockholder, all shares of Company
Common Stock owned, either beneficially or of record, by such Stockholder on the date of this
Agreement.

     “Permitted Transfer” means a Transfer by a Stockholder (or an Affiliate thereof) to an
Affiliate of such Stockholder, provided that such transferee Affiliate agrees in writing to assume
all of such transferring Stockholder’s obligations hereunder in respect of the Covered Shares
subject to such Transfer and to be bound by, and comply with, the terms of this Agreement, with
respect to the Covered Shares subject to such Transfer, and all other Covered Shares owned
beneficially or of record from time to time by such transferee Affiliate, to the same extent as
such Stockholder is bound hereunder.

     “Transfer” means, directly or indirectly, to sell, transfer, assign or otherwise
dispose of (whether by merger or consolidation (including by conversion into securities or other
consideration as a result of such merger or consolidation), by tendering into any tender or
exchange offer, by testamentary disposition, by operation of law or otherwise), either voluntarily
or involuntarily, or to enter into any contract, option or other arrangement or understanding with
respect to the voting of or sale, transfer, conversion, assignment or other disposition of (whether
by merger or consolidation (including by conversion into securities or other consideration as a
result of such merger or consolidation), by tendering into any tender or exchange offer, by
testamentary disposition, by operation of law or otherwise).

ARTICLE 2

VOTING

     Section 2.1 Agreement to Vote Covered Shares. Each Stockholder hereby irrevocably and
unconditionally agrees that, during the term of this Agreement, at any meeting of the stockholders
of the Company, however called, including any adjournment or postponement thereof, and in
connection with any written consent of the stockholders of the Company (or any class or subdivision
thereof), the Stockholder shall, in each case to the fullest extent that the Covered Shares are
entitled to vote thereon or consent thereto:

     (a) appear at each such meeting or otherwise cause its Covered Shares to be
counted as present thereat for purposes of calculating a quorum; and

     (b) vote (or cause to be voted), in person or by proxy, or deliver (or cause
to be delivered) a written consent covering, all of the Covered Shares:

     (i) in favor of the approval or adoption of, or consent to, the
Merger Agreement, any transactions contemplated by the Merger Agreement and any
other action reasonably requested by Parent in furtherance thereof submitted for the
vote or written consent of stockholders of the Company;

- 2 -

 

     (ii) against the approval or adoption of (A) any Acquisition Proposal
or any other action, agreement, transaction or proposal made in opposition to the
approval of the Merger Agreement or inconsistent with the Merger and the other
transactions contemplated by the Merger Agreement, or (B) any action, agreement,
transaction or proposal that is intended, or would reasonably be expected, to result
in a material breach of any covenant, agreement, representation, warranty or any
other obligation of the Company Parties contained in the Merger Agreement or of such
Stockholder contained in this Agreement; and

     (iii) against any action, agreement, transaction or proposal that is
intended, would reasonably be expected, or the result of which would reasonably be
expected, to materially impede, interfere with, delay, postpone, discourage,
frustrate the purposes of or adversely affect the Merger or the other transactions
contemplated by the Merger Agreement, including but not limited to the following
actions (other than the Merger and the other transactions contemplated by the Merger
Agreement and actions requested or expressly permitted by Parent): (A) any
extraordinary corporate transaction, such as a merger, consolidation or other
business combination involving a Company Entity; (B) a sale, lease or transfer of a
material amount of assets of a Company Entity, or a reorganization,
recapitalization, dissolution, liquidation or winding up of a Company Entity; (C)
(1) any change in a majority of persons who constitute the Board of Directors of the
Company as of the date hereof, except for changes requested or expressly permitted
by Parent, (2) any change in the present capitalization of the Company or any
amendment to any charter, bylaws, limited liability company agreement, limited
partnership agreement or other company constituent document of any Company Entity,
or (3) any other material change in a Company Entity’s organizational structure or
business.

     Section 2.2 No Inconsistent Agreements. Each Stockholder hereby represents, covenants
and agrees that, except for this Agreement, such Stockholder (a) has not entered into, and shall
not enter into at any time while this Agreement remains in effect, any voting agreement or voting
trust with respect to its Covered Shares, (b) has not granted, and shall not grant at any time
while this Agreement remains in effect, a proxy, consent or power of attorney with respect to its
Covered Shares (except pursuant to Section 2.3 hereof) and (c) has not taken and shall not
take any action that would make any representation or warranty of such Stockholder contained herein
untrue or incorrect in any material respect or have the effect of preventing or disabling such
Stockholder from performing in any material respect any of its obligations under this Agreement.

     Section 2.3 Proxy. In order to secure the obligations set forth herein, each
Stockholder hereby irrevocably appoints Parent, or any nominee thereof, with full power of
substitution and resubstitution, as its true and lawful proxy and attorney-in-fact, in the event
that such Stockholder does not comply with its obligations in Section 2.1, to vote or
execute written consents with respect to such Stockholder’s Covered Shares in accordance with
Section 2.1 hereof and with respect to any proposed postponements or adjournments of any
meeting of the stockholders of the Company at which any of the matters described in Section
2.1 hereof are to be considered. Each Stockholder hereby affirms that this proxy is coupled
with an interest and

- 3 -

 

shall be irrevocable, except upon termination of this Agreement, and such Stockholder will
take such further action or execute such other instruments as may be necessary to effectuate the
intent of this proxy and hereby revokes any proxy previously granted by such Stockholder with
respect to any of its Covered Shares. Parent may terminate this proxy with respect to any
Stockholder at any time at its sole election by written notice provided to such Stockholder.

ARTICLE 3

REPRESENTATIONS AND WARRANTIES

     Section 3.1 Representations and Warranties of the Stockholders. Each Stockholder
(except to the extent otherwise provided herein) hereby represents and warrants to the Parent
Parties, severally for itself and with respect to its Covered Shares only, and not jointly with the
other Stockholders or with respect to the Covered Shares of any other Stockholder, as follows:

     (a) Organization; Authorization; Validity of Agreement; Necessary
Action. Such Stockholder has the requisite power and authority and/or capacity to
execute and deliver this Agreement and to carry out its obligations hereunder. The
execution and delivery by such Stockholder of this Agreement and the performance by it of
the obligations hereunder have been duly and validly authorized by such Stockholder and no
other actions or proceedings are required on the part of such Stockholder to authorize the
execution and delivery of this Agreement or the performance by such Stockholder of its
obligations hereunder. This Agreement has been duly executed and delivered by such
Stockholder and, assuming the due authorization, execution and delivery of this Agreement by
the Parent Parties, constitutes a legal, valid and binding agreement of such Stockholder,
enforceable against it in accordance with its terms, subject to bankruptcy, insolvency,
fraudulent transfer, reorganization, moratorium and similar laws of general applicability
relating to or affecting creditors’ rights and to general equitable principles.

     (b) Ownership. Such Stockholder is the record and beneficial owner
of, and has good title to, its Existing Shares, free and clear of any Liens, except as may
be provided for in this Agreement. All of such Stockholder’s Covered Shares from the date
hereof through and on the Closing Date will be beneficially or legally owned by such
Stockholder, except in the case of a Permitted Transfer of any Covered Shares (in which case
this representation shall, with respect to such Covered Shares, be made by the transferee of
such Covered Shares). Except as provided for in this Agreement, such Stockholder has and
will have at all times through the Closing Date sole voting power (including the right to
control such vote as contemplated herein), sole power of disposition, sole power to issue
instructions with respect to the matters set forth in Article 2 hereof, and sole
power to agree to all of the matters set forth in this Agreement, in each case with respect
to all of such Stockholder’s Existing Shares and with respect to all of such Stockholder’s
Covered Shares at any time through the Closing Date, except in the case of a Permitted
Transfer (in which case this representation shall, with respect to such Covered Shares, be
made by the transferee of such Covered Shares). Such Stockholder does not, directly or
indirectly, legally or beneficially own or have any option, warrant or other right to
acquire any securities of a Company Entity that are or may by their terms become entitled to
vote or any securities that are convertible or

- 4 -

 

exchangeable into or exercisable for any securities of a Company Entity that are or may by their terms
become entitled to vote, nor is such Stockholder subject to any contract, agreement,
arrangement, understanding or relationship, other than this Agreement, that obligates it to
vote, acquire or dispose of any securities of a Company Entity.

     (c) No Violation. Neither the execution and delivery of this
Agreement by such Stockholder nor its performance of its obligations under this Agreement
will (i) result in a violation or breach of, or conflict with any provisions of, or
constitute a default (or an event which, with notice or lapse of time or both, would
constitute a default) under, or result in the termination or cancellation of, or give rise
to a right of purchase under, or result in the creation of any Lien (other than under this
Agreement) upon any of the properties, rights or assets (including but not limited to its
Existing Shares) owned by such Stockholder under, any of the terms, conditions or provisions
of any note, bond, mortgage, indenture, deed of trust, license, contract, lease, agreement
or other instrument or obligation of any kind to which such Stockholder is a party or by
which it or any of its respective properties, rights or assets may be bound, (ii) violate
any Law applicable to such Stockholder or any of its properties, rights or assets, or (iii)
result in a violation or breach of or conflict with its organizational and governing
documents, except in the case of clause (i) as would not reasonably be expected to prevent
or materially delay the ability of such Stockholder to perform its obligations hereunder.

     (d) Consents and Approvals. No consent, approval, order or
authorization of, or registration, declaration or filing with, any Governmental Entity is
necessary to be obtained or made by such Stockholder in connection with its execution,
delivery and performance of this Agreement, except for any reports under Sections 13(d) and
16 of the Exchange Act as may be required in connection with this Agreement and the
transactions contemplated hereby.

     (e) Reliance by Parent. Such Stockholder understands and
acknowledges that the Parent Parties are entering into the Merger Agreement in reliance upon
such Stockholder’s execution and delivery of this Agreement and the representations,
warranties, covenants and obligations of such Stockholder contained herein.

     (f) Adequate Information. Such Stockholder acknowledges that it is a
sophisticated party with respect to its Covered Shares and has adequate information
concerning the business and financial condition of the Company to make an informed decision
regarding the transactions contemplated by this Agreement and has, independently and without
reliance upon any of the Parent Parties and based on such information as such Stockholder
has deemed appropriate, made its own analysis and decision to enter into this Agreement.
Such Stockholder acknowledges that no Parent Party has made or is making any representation
or warranty, whether express or implied, of any kind or character except as expressly set
forth in this Agreement.

     Section 3.2 Representations and Warranties of Parent. Parent hereby represents and
warrants to each Stockholder that the execution and delivery of this Agreement by Parent and the
consummation of the transactions contemplated hereby have been duly authorized by all necessary
action on the part of the board of directors of the general partner of Parent. The Parent

- 5 -

 

Parties acknowledge that no Stockholder has made and no Stockholder is making any
representation or warranty of any kind except as expressly set forth in this Agreement.

ARTICLE 4

OTHER COVENANTS

     Section 4.1 Prohibition on Transfers, Other Actions.

     (a) Each Stockholder hereby agrees, except for a Permitted Transfer, not to
(i) Transfer any of the Covered Shares, beneficial ownership thereof or any other interest
therein, (ii) enter into any agreement, arrangement or understanding, or take any other
action, that violates or conflicts with, or would reasonably be expected to violate or
conflict with, or would reasonably be expected to result in or give rise to a violation of
or conflict with, such Stockholder’s representations, warranties, covenants and obligations
under this Agreement, or (iii) take any action that would restrict or otherwise affect such
Stockholder’s legal power, authority and right to comply with and perform its covenants and
obligations under this Agreement. Any Transfer in violation of this provision shall be null
and void.

     (b) Each Stockholder agrees that if it attempts to Transfer (other than a
Permitted Transfer), vote or provide any other Person with the authority to vote any of the
Covered Shares other than in compliance with this Agreement, such Stockholder shall
unconditionally and irrevocably (during the term of this Agreement) instruct the Company to
not, (i) permit any such Transfer on its books and records, (ii) issue a book-entry interest
or a new certificate representing any of the Covered Shares, or (iii) record such vote
unless and until such Stockholder has complied in all respects with the terms of this
Agreement.

     (c) Each Stockholder agrees that it shall not, and shall cause each of its
controlled Affiliates to not, become a member of a “group” (as that term is used in Section
13(d) of the Exchange Act) that such Stockholder or such Affiliate is not currently a part
of and that has not been disclosed in a filing with the SEC prior to the date hereof (other
than as a result of entering into this Agreement) for the purpose of opposing or competing
with the transactions contemplated by the Merger Agreement.

     (d) Each Stockholder agrees not to knowingly take any action that would make
any of its representations or warranties contained herein untrue or incorrect in any
material respect or would reasonably be expected to have the effect of preventing, impeding
or interfering with or adversely affecting in any material respect its performance of its
obligations under or contemplated by this Agreement.

     Section 4.2 Further Assurances. Each of the parties hereto agrees that it will use
its reasonable best efforts to do all things reasonably necessary to effectuate this Agreement.

     Section 4.3 Waiver of Appraisal Rights and Claims. Each Stockholder hereby waives any
and all rights of appraisal or rights to dissent from the consummation of the Merger and any
transactions contemplated by the Merger Agreement.

- 6 -

 

ARTICLE 5

NO SOLICITATION

     Section 5.1 No Solicitation. Prior to the termination of this Agreement, each
Stockholder shall not, and shall cause its officers, employees, legal counsel, financial advisors,
agents and other representatives (collectively, “Representatives”) not to, directly or
indirectly (a) solicit or initiate, or knowingly encourage or facilitate, any Acquisition Proposal
or any inquiries regarding the submission of any Acquisition Proposal, (b) participate in any
discussions or negotiations regarding, or furnish any third party any confidential information
regarding the Company or its Subsidiaries in response to or in connection with any Acquisition
Proposal, or (c) enter into any agreement with respect to any Acquisition Proposal or approve or
resolve to approve any Acquisition Proposal; provided, however, notwithstanding anything in this
Agreement to the contrary, prior to obtaining the Company Stockholder Approval, the restrictions
set forth in this Section 5.1 shall not apply to the Stockholders and their Representatives,
including in their capacity as beneficial owners of the Covered Shares, to the extent that the
Company and its Subsidiaries, and its and their Representatives, are permitted by the terms of
Section 5.4(a) of the Merger Agreement to take such actions. Each Stockholder shall, and shall
cause its Representatives to, immediately cease and cause to be terminated all existing discussions
or negotiations with any third party conducted prior to the date of this Agreement with respect to
any Acquisition Proposal.

     Notwithstanding any provision in this Agreement to the contrary, the Stockholders have entered
into this Agreement solely in their capacity as the beneficial owners of the Covered Shares, and
nothing herein shall limit or effect any actions taken by any Stockholder or Representative of a
Stockholder in such Stockholder’s or such Representative’s capacity as a director or officer of the
Company. In addition, for purposes of this Agreement, the Company shall be deemed not to be an
Affiliate of any of the Stockholders, and any officer, director, employee, agent or advisor of the
Company (in each case, in their capacities as such), shall be deemed not to be a Representative of
a Stockholder.

ARTICLE 6

MISCELLANEOUS

     Section 6.1 Termination. This Agreement shall remain in effect until the earliest to
occur of (a) the Effective Time, (b) a Change of Recommendation in connection with an Intervening
Event pursuant to Section 5.4 of the Merger Agreement, or (c) the valid termination of the Merger
Agreement in accordance with its terms (including after any extension thereof), in which case this
Agreement shall terminate and be of no further force and effect with respect to all parties hereto.
The Parent may terminate this Agreement with respect to all or any portion of any Stockholder’s
Covered Shares by delivering a written notice to such Stockholder stating the portion of such
Stockholder’s Covered Shares with respect to which this Agreement is terminated (in which case such
Stockholder’s obligations hereunder shall terminate only with respect to the portion of its Covered
Shares so identified). Nothing in this Section 6.1 and no termination of this Agreement
shall relieve or otherwise limit any party of liability for any breach of this Agreement occurring
prior to such termination.

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     Section 6.2 No Ownership Interest. Nothing contained in this Agreement shall be
deemed to vest in any Parent Party any direct or indirect ownership or incidence of ownership of or
with respect to any Covered Shares. All rights, ownership and economic benefit relating to the
Covered Shares of any Stockholder shall remain vested in and belong to such Stockholder, and Parent
shall have no authority to direct such Stockholder in the voting or disposition of any of its
Covered Shares, except as otherwise provided herein.

     Section 6.3 Publicity. Each Stockholder hereby permits Parent and the Company to
include and disclose in the Proxy Statement, and in such other schedules, certificates,
applications, agreements or documents as such entities reasonably determine to be necessary or
appropriate in connection with the consummation of the Merger and the transactions contemplated by
the Merger Agreement such Stockholder’s identity and ownership of the Covered Shares and the nature
of such Stockholder’s commitments, arrangements and understandings pursuant to this Agreement.
Parent and the Company hereby permit each Stockholder to disclose this Agreement and the
transactions contemplated by the Merger Agreement in any reports required to be filed by such
Stockholder or any of its Affiliates under Sections 13(d) and 16 of the Exchange Act.

     Section 6.4 Notices. All notices and other communications hereunder shall be in
writing and shall be deemed given when delivered personally or by facsimile or email (upon
telephonic confirmation of receipt) or on the first Business Day following the date of dispatch if
delivered by a recognized next day courier service. All notices hereunder shall be delivered as
set forth below or pursuant to such other instructions as may be designated in writing by the party
to receive such notice:

     If to Parent or Merger Sub, to:

      

Energy Transfer Equity, L.P.

3738 Oak Lawn Avenue

Dallas, TX 75219

Attention: John McReynolds

Facsimile: (214) 981-0706

Email: tom.mason@energytransfer.com

     with a copy (which shall not constitute notice) to:

      

Latham & Watkins LLP

717 Texas Avenue, 16th Floor

Houston, Texas 77002

Attention: William N. Finnegan, Esq.

                   Sean T. Wheeler, Esq.

Fax: 713-546-5401

Email: bill.finnegan@lw.com

           sean.wheeler@lw.com

If to any Stockholder, to the address set forth below such Stockholder’s name on Schedule I
hereto.

- 8 -

 

     Section 6.5 Interpretation. The words “hereof,” “herein” and “hereunder” and words of
similar import when used in this Agreement shall refer to this Agreement as a whole and not to any
particular provision of this Agreement, and Section references are to this Agreement unless
otherwise specified. Whenever the words “include,” “includes” or “including” are used in this
Agreement, they shall be deemed to be followed by the words “without limitation.” The meanings
given to terms defined herein shall be equally applicable to both the singular and plural forms of
such terms. The headings contained in this Agreement are for reference purposes only and shall not
affect in any way the meaning or interpretation of this Agreement. This Agreement is the product
of negotiation by the parties having the assistance of counsel and other advisers. It is the
intention of the parties that this Agreement not be construed more strictly with regard to one
party than with regard to the others.

     Section 6.6 Counterparts. This Agreement may be executed by facsimile and in
counterparts, all of which shall be considered one and the same agreement and shall become
effective when counterparts have been signed by each of the parties and delivered to the other
parties, it being understood that all parties need not sign the same counterpart.

     Section 6.7 Entire Agreement. This Agreement and, solely to the extent of the defined
terms referenced herein, the Merger Agreement, together with the schedule annexed hereto, embody
the complete agreement and understanding among the parties hereto with respect to the subject
matter hereof and supersede and preempt any prior understandings, agreements or representations by
or among the parties, written and oral, that may have related to the subject matter hereof in any
way.

     Section 6.8 Governing Law; Consent to Jurisdiction; Waiver of Jury Trial.

     (a) THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND DOCUMENTS CONTEMPLATED
HEREBY AND ALL DISPUTES BETWEEN THE PARTIES UNDER OR RELATING TO THIS AGREEMENT OR THE FACTS
AND CIRCUMSTANCES LEADING TO ITS EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE, SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE (WITHOUT
REFERENCE TO SUCH STATE’S PRINCIPLES OF CONFLICTS OF LAW). THE DELAWARE COURT OF CHANCERY
(AND IF THE DELAWARE COURT OF CHANCERY SHALL BE UNAVAILABLE, ANY DELAWARE STATE COURT AND
THE FEDERAL COURT OF THE UNITED STATES OF AMERICA SITTING IN THE STATE OF DELAWARE) WILL
HAVE EXCLUSIVE JURISDICTION OVER ANY AND ALL DISPUTES BETWEEN THE PARTIES HERETO, WHETHER IN
LAW OR EQUITY, BASED UPON, ARISING OUT OF OR RELATING TO THIS AGREEMENT AND THE AGREEMENTS,
INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY OR THE FACTS AND CIRCUMSTANCES LEADING TO ITS
EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE. EACH OF THE PARTIES IRREVOCABLY CONSENTS
TO AND AGREES TO SUBMIT TO THE EXCLUSIVE JURISDICTION OF SUCH COURTS IN ANY SUCH DISPUTE,
IRREVOCABLY CONSENTS TO THE SERVICE OF THE SUMMONS AND COMPLAINT AND ANY OTHER PROCESS IN
ANY OTHER ACTION OR PROCEEDING RELATING TO THE

- 9 -

 

TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, ON BEHALF OF ITSELF OR ITS PROPERTY, BY
DELIVERY IN ANY METHOD CONTEMPLATED BY SECTION 6.4 HEREOF OR IN ANY OTHER MANNER
AUTHORIZED BY LAW, AND HEREBY WAIVES, AND AGREES NOT TO ASSERT IN ANY SUCH DISPUTE, TO THE
FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY CLAIM THAT (i) SUCH PARTY IS NOT PERSONALLY
SUBJECT TO THE JURISDICTION OF SUCH COURTS, (ii) SUCH PARTY AND SUCH PARTY’S PROPERTY IS
IMMUNE FROM ANY LEGAL PROCESS ISSUED BY SUCH COURTS OR (iii) ANY LITIGATION COMMENCED IN
SUCH COURTS IS BROUGHT IN AN INCONVENIENT FORUM.

     (b) THE PARTIES HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE ANY
RIGHT WHICH ANY PARTY MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY PROCEEDING, LITIGATION OR
COUNTERCLAIM BASED ON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY
COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF
ANY PARTY. IF THE SUBJECT MATTER OF ANY LAWSUIT IS ONE IN WHICH THE WAIVER OF JURY TRIAL IS
PROHIBITED, NO PARTY TO THIS AGREEMENT SHALL PRESENT AS A NON-COMPULSORY COUNTERCLAIM IN ANY
SUCH LAWSUIT ANY CLAIM BASED ON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS
AGREEMENT. FURTHERMORE, NO PARTY TO THIS AGREEMENT SHALL SEEK TO CONSOLIDATE ANY SUCH
ACTION IN WHICH A JURY TRIAL CANNOT BE WAIVED.

     Section 6.9 Amendment; Waiver. The obligations of any Stockholder hereunder may not
be modified or amended except by an instrument in writing signed by Parent and by each Stockholder
with respect to which such modification or amendment will be effective. Each party may waive any
right of such party hereunder by an instrument in writing signed by such party and delivered to the
party benefiting from such waiver. No amendment or waiver shall be permitted or effective without
the prior written consent of the Company.

     Section 6.10 Remedies. The parties hereto agree that money damages would not be a
sufficient remedy for any breach of this Agreement and that irreparable damage would occur in the
event that any of the provisions of this Agreement were not performed in accordance with their
specific terms or were otherwise breached. It is hereby agreed that, prior to the valid
termination of this Agreement pursuant to Section 6.1 hereof, the parties hereto shall be
entitled to specific performance and injunctive or other equitable relief as a remedy for any such
breach, to prevent breaches of this Agreement, and to specifically enforce compliance with this
Agreement. In connection with any request for specific performance or equitable relief, each of
the parties hereto hereby waives any requirement for the security or posting of any bond in
connection with such remedy. Such remedy shall not be deemed to be the exclusive remedy for breach
of this Agreement but shall be in addition to all other remedies available at law or equity to such
party. The parties further agree that, by seeking the remedies provided for in this Section
6.10, no party hereto shall in any respect waive its right to seek any other form of relief
that may be available to it under this Agreement, including monetary damages in the event that this

- 10 -

 

Agreement has been terminated or in the event that the remedies provided for in this
Section 6.10 are not available or otherwise are not granted.

     Section 6.11 Severability. To the fullest extent permitted by law, any term or
provision of this Agreement, or the application thereof, that is invalid or unenforceable in any
situation in any jurisdiction shall not affect the validity or enforceability of the remaining
terms and provisions hereof or the validity or enforceability of the offending term or provision in
any other situation or in any other jurisdiction. If the final judgment of a court of competent
jurisdiction declares that any term or provision hereof is illegal, void, invalid or unenforceable,
the parties hereto agree that the court making such determination shall have the power to limit the
term or provision, to delete specific words or phrases, or to replace any illegal, void, invalid or
unenforceable term or provision with a term or provision that is legal, valid and enforceable and
that comes closest to expressing the intention of the illegal, void, invalid or unenforceable term
or provision, and this Agreement shall be enforceable as so modified. To the fullest extent
permitted by law, in the event such court does not exercise the power granted to it in the prior
sentence, the parties hereto shall replace such invalid or unenforceable term or provision with a
valid and enforceable term or provision that will achieve, to the extent possible, the original
economic, business and other purposes of such invalid or unenforceable term as closely as possible
in an acceptable manner in order that the transactions contemplated hereby be consummated as
originally contemplated to the fullest extent possible.

     Section 6.12 Expenses. Except as otherwise expressly provided herein or in the Merger
Agreement, all costs and expenses incurred in connection with this Agreement and the actions
contemplated hereby shall be paid by the party incurring such expenses, whether or not the Merger
is consummated.

     Section 6.13 Successors and Assigns; Third Party Beneficiaries.

     (a) Except in connection with a Permitted Transfer, neither this Agreement
nor any of the rights, interests or obligations hereunder shall be assigned by any of the
parties hereto (whether by operation of Law or otherwise) without the prior written consent
of the other parties; provided, however, that Parent and Merger Sub may
transfer or assign their rights and obligations under this Agreement, in whole or in part or
from time to time in part, to one or more of their Affiliates at any time. Any assignment
in violation of the foregoing shall be null and void. Subject to the preceding two
sentences, this Agreement will be binding upon, inure to the benefit of and be enforceable
by the parties and their respective successors and assigns.

     (b) Other than the Company with respect to Section 6.3 hereof, this
Agreement is not intended to and shall not confer upon any Person (other than the parties
hereto) any rights or remedies hereunder.

[Signature pages follow.]

- 11 -

 

     IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of
the date first written above by their respective officers thereunto duly authorized.

	 	 	 	 	 
	 	PARENT:

ENERGY TRANSFER EQUITY, L.P.

By: LE GP, LLC, its general partner

 	 
	 	By:  	/s/
John McReynolds 	 
	 	 	Name:  	John McReynolds 	 
	 	 	Title:  	President and Chief Financial Officer 	 
	 

	 	 	 	 	 
	 	MERGER SUB:

SIGMA ACQUISITION CORPORATION

 	 
	 	By:  	/s/
John McReynolds 	 
	 	 	Name:  	John McReynolds 	 
	 	 	Title:  	President and Chief Financial Officer 	 
	 

[Signature Page of Parent and Merger Sub to Support Agreement]

 

 

     IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of
the date first written above by their respective officers thereunto duly authorized.

STOCKHOLDERS:

	 	 	 

	 
	 
	/s/ GEORGE L. LINDEMANN

	 	/s/ ERIC D. HERSCHMANN
	 

	 	 
	GEORGE L. LINDEMANN

	 	ERIC D. HERSCHMANN
	 
	 	 
	 
	 
	/s/ DR. FRAYDA B. LINDEMANN

	 	/s/ ADAM M. LINDEMANN
	 

	 	 
	DR. FRAYDA B. LINDEMANN

	 	ADAM M. LINDEMANN
	 
	 	 
	 
	 
	/s/ GEORGE L. LINDEMANN, JR.

	 	/s/ SLOAN LINDEMANN BARNETT
	 

	 	 
	GEORGE L. LINDEMANN, JR.

	 	SLOAN LINDEMANN BARNETT

[Signature Page of Stockholders to Support Agreement]

 

 

Schedule I

	 	 	 	 	 
	 	 	 	 	Shares of Company Common Stock
	Stockholder	 	Address	 	Held Beneficially or of-Record*
	George L. Lindemann
	 	1565 North Ocean Way     
	 	Shares: 4,485,628**     

	 
	 	Palm Beach, Florida 33480	 	Options: 1,888,162
	 
	 	 	 	 
	Eric D. Herschmann
	 	3333 Allen Parkway #2207     
	 	Shares : 555,091***     

	 
	 	Houston, TX 77019	 	Options: 1,185,768
	 
	 	 	 	 
	Dr. Frayda B. Lindemann
	 	1565 North Ocean Way     
	 	3,289,220
	 
	 	Palm Beach Florida, Florida 33480	 	 
	 
	 	 	 	 
	George L. Lindemann, Jr.
	 	1736 West 28th Street                
	 	3,365,500
	 
	 	Miami Beach, FL 33141	 	 
	 
	 	 	 	 
	Adam M. Lindemann
	 	77 East 77th Street                
	 	2,000,000 (approximate; +/-     

	 
	 	New York, NY 10075	 	not more than 100,000 shares)
	 
	 	 	 	 
	Sloan Lindemann Barnett
	 	2920 Broadway Street
	 	3,369,667
	 
	 	San Franciso, CA 94115	 	 

 

			
	*	 	As of June 14, 2011, Southern Union Company had 124,721,110 shares of common stock issued and
outstanding. As of June 14, 2011, the shares represented on the chart above represent
approximately 13.43% of the issued and outstanding shares of common stock of Southern Union
Company. The options and non-expired/lapsed restricted shares awarded to Messrs. Lindemann and
Herschmann have not been included in the foregoing calculation as they are not able to be voted at
this time.
	 
	**	 	Included in this number are 144,888 shares held in the Southern Union Company Supplemental
Deferred Compensation Plan and 29,870 shares in the Southern Union 401(k) Savings Plan as of
December 31, 2010. Included in this number are 69,513 restricted shares awarded to Mr. Lindemann
under the Southern Union Company Third Amended and Restated 2003 Stock and Incentive Plan for which
restrictions have not otherwise lapsed/expired. The options and unlapsed/unexpired restricted
shares are not able to be voted at this time.
	 
	***	 	Included in this number are 251,308 restricted shares awarded to Mr. Herschmann under the
Southern Union Company Third Amended and Restated 2003 Stock and Incentive Plan for which
restrictions have not otherwise lapsed/expired. The options and unlapsed/unexpired restricted
shares are not able to be voted at this time.

[Schedule I to Support Agreement]

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