Comment of Sierra Club under CP13-483, et. al.

National Energy Technology Laboratory OFFICE OF FOSSIL ENERGY Life Cycle Analysis of Natural Gas Extraction and Power Generation May 29, 2014 DOE/NETL-2014/1646 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed therein do not necessarily state or reflect those of the United States Government or any agency thereof. Author List: National Energy Technology Laboratory (NETL) Timothy J. Skone, P.E. Senior Environmental Engineer Strategic Energy Analysis and Planning Division Energy Sector Planning and Analysis (ESPA) James Littlefield, Dr. Joe Marriott, Greg Cooney, Matt Jamieson, Jeremie Hakian, and Greg Schivley Booz Allen Hamilton, Inc. This report was prepared by Energy Sector Planning and Analysis (ESPA) for the United States Department of Energy (DOE), National Energy Technology Laboratory (NETL). This work was completed under DOE NETL Contract Number DE-FE0004001. This work was performed under ESPA Tasks 150.02 and 150.08. The authors wish to acknowledge the excellent guidance, contributions, and cooperation of the NETL staff, particularly: Erik Shuster, NETL Technical Monitor DOE Contract Number DE-FE0004001 This page intentionally left blank. Life Cycle Analysis of Natural Gas Extraction and Power Generation Table of Contents Executive Summary ............................................................................................................................... 1 1 Introduction ......................................................................................................................................... 5 2 Inventory Method and Assumptions ................................................................................................... 5 2.1 Boundaries .................................................................................................................................. 5 2.2 Basis of Comparison (Functional Unit) ...................................................................................... 6 2.2.1 Global Warming Potential .................................................................................................. 6 2.3 Representativeness of Inventory Results .................................................................................... 7 2.3.1 Temporal ..................................................