Chief Oil & Gas LLC  ("Chief") today announced a voluntary disclosure initiative of Marcellus Shale hydraulic fracturing additives.  Starting on October 1, Chief will voluntarily submit to the Pennsylvania Department of Environmental Protection (PADEP) and West Virginia Department of Environmental Protection (WVDEP) detailed information about additives used in the completion process of hydraulic fracturing natural gas wells that Chief operates in Pennsylvania and West Virginia.

"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 ...