2001 Bryan Street

Suite 3700

Dallas, TX 75201

MAIN   214.750.1771

FAX      214.750.1749

www.regencyenergy.com

September 21, 2011

Mr. Samta Gupta

E & P Company, LLC

2500 Tanglewilde St., Suite 260

Houston, TX 77063

Mr. Gupta:

Enclosed you will find:

Regency Field Services, LLC appreciates the opportunity to do business with your company and looks forward to our continuing relationship.

If you should have any questions, please contact Jennifer Rost at (214) 840-5673.

7238

AMENDMENT TO

BASE CONTRACT FOR SALE AND PURCHASE OF NATURAL GAS

THIS AMENDMENT TO Base Contract for Sale and Purchase of Natural Gas (“Amendment”) is entered into as of this l^st day of September, 2011 by E&P Company, LLC and Regency Field Services LLC, formerly Regency Gas Marketing LLC, (collectively referred to as “the Parties”).

WHEREAS, the Parties desire to amend that certain Base Contract for Sale and Purchase of Natural Gas dated 11/20/2009 (the “Agreement”);

NOW, THEREFORE, for and in consideration of the premises and of the mutual covenants contained herein, the Parties agree to amend the Agreement as follows:

“Force Majeure shall include, but not be limited to, the following: (i) physical events such as acts of God, landslides, lightning, earthquakes, fires, storms or storm warnings, such as hurricanes, which result in evacuation of the affected area, floods, washouts, and explosions, (ii) breakage or accident or necessity of repairs to machinery or equipment or lines of pipe; (iii) weather related events affecting an entire geographic region, such as low temperatures which cause freezing or failure of wells or lines of pipe; (iv) interruption and/or curtailment of Firm transportation and/or storage by Transporters; (v) acts of others such as strikes, lockouts or other industrial disturbances, riots, Sabotage, insurrections or wars, or acts of terror; and (vi) governmental actions such as necessity for compliance with any court order, law, statute, ordinance, regulation, or policy having the effect of law promulgated by a governmental authority having jurisdiction. Seller and Buyer shall make reasonable efforts to avoid the adverse impacts of a Force Majeure and to resolve the event or occurrence once it has occurred in order to resume performance.”

The Agreement is amended to the extent noted herein. In all other respects, it is confirmed and shall continue in full force and effect.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment in person or by their duly authorized officials.