Chief Oil & Gas Voluntarily Discloses Marcellus Shale Hydraulic Fracturing Additives on Website

Reports are available to the public via company website.

DALLAS, TX (October 1, 2010) – Chief Oil & Gas LLC ("Chief") today announced the voluntary disclosure of Marcellus Shale hydraulic fracturing additives. Reports available on the Chief website (http://www.chiefoilandgas.com) provide detailed information about additives used in the completion process of hydraulic fracturing natural gas wells that Chief operates in Pennsylvania and West Virginia.

Chief will also voluntarily submit the reports to the Pennsylvania Department of Environmental Protection (PADEP) and West Virginia Department of Environmental Protection (WVDEP).

“It is our hope that this voluntary disclosure of the additives used at each well site, along with the volumes, dilution factors and classifications will help alleviate the public’s concern and increase the open, honest and transparent communication that have been Chief values since its start in 1994,” said Michael Radler, Chief Operating Officer.

“The Marcellus Shale is an enormous opportunity for all who live miles above it and Chief is fully committed to working to achieve the proper balance while developing this game-changing U.S. natural gas resource. Our commitment includes working together with the communities around our operations; respecting and protecting all natural resources; repairing, sometimes in advance, the roads we travel with our trucks and equipment; a focus on hiring locally which includes working with education and training initiatives and our decade-long dedication to community outreach and education. To date, Chief has hosted or participated in hundreds of community education events throughout the Marcellus Shale and has hosted more than 200 field tours of Chief operations to showcase shale drilling and production.”

About Chief Oil & Gas LLC

Based in Dallas, Texas, Chief Oil & Gas is privately held, independent oil & gas company engaged in the exploration, development and production of oil and natural gas reserves from fields throughout the continental United States.