Chemical Management and Disclosure

In the last few years, public concerns have been raised that the chemicals used in fracturing fluids may reach ground and surface water supplies. We require our site operators to adhere to strict standards and best management practices to avoid potential environmental impacts during onshore oil and natural gas development. It is not our practice to unnecessarily store fracturing fluids on location. Upon delivery, fracturing fluids are blended on location and pumped, and flowback fluids are captured in steel tanks and then properly disposed of according to applicable federal and state laws and regulations. Noble Energy encourages the utilization of environmentally friendly additives. We do not use diesel fuel in our hydraulic fracturing fluids.

Noble Energy is an active member and participant in FracFocus.org, a national hydraulic fracturing chemical registry website. We began voluntarily disclosing the chemicals used at Noble Energy wells through FracFocus.org in mid-2011.