eprintid: 1875 rev_number: 9 eprint_status: archive userid: 6 dir: disk0/00/00/18/75 datestamp: 2017-05-16 14:05:08 lastmod: 2017-05-16 14:05:08 status_changed: 2017-05-16 14:05:08 type: article metadata_visibility: show creators_name: Rozell, Daniel J. creators_name: Raeven, Sheldon J. corp_creators: Department of Technology and Society, Stony Brook University, Stony Brook, NY corp_creators: Department of Technology and Society, State University of New York at Stony Brook, Stony Brook, NY, USA. title: Water Pollution Risk Associated with Natural Gas Extraction from the Marcellus Shale subjects: O subjects: SHU divisions: SHEER full_text_status: none keywords: Marcellus; probability bounds analysis; water abstract: In recent years, shale gas formations have become economically viable through the use of horizontal drilling and hydraulic fracturing. These techniques carry potential environmental risk due to their high water use and substantial risk for water pollution. Using probability bounds analysis, we assessed the likelihood of water contamination from natural gas extraction in the Marcellus Shale. Probability bounds analysis is well suited when data are sparse and parameters highly uncertain. The study model identified five pathways of water contamination: transportation spills, well casing leaks, leaks through fractured rock, drilling site discharge, and wastewater disposal. Probability boxes were generated for each pathway. The potential contamination risk and epistemic uncertainty associated with hydraulic fracturing wastewater disposal was several orders of magnitude larger than the other pathways. Even in a best-case scenario, it was very likely that an individual well would release at least 200 m3 of contaminated fluids. Because the total number of wells in the Marcellus Shale region could range into the tens of thousands, this substantial potential risk suggested that additional steps be taken to reduce the potential for contaminated fluid leaks. To reduce the considerable epistemic uncertainty, more data should be collected on the ability of industrial and municipal wastewater treatment facilities to remove contaminants from used hydraulic fracturing fluid. date: 2011-12 date_type: published publication: Risk Analysis volume: 32 number: 8 publisher: Wiley pagerange: 1382-1393 id_number: 10.1111/j.1539-6924.2011.01757.x issn: 0272-4332 access_IS-EPOS: limited owner: Publisher citation: Rozell, Daniel J. and Raeven, Sheldon J. (2011) Water Pollution Risk Associated with Natural Gas Extraction from the Marcellus Shale. Risk Analysis, 32 (8). pp. 1382-1393. DOI: https://doi.org/10.1111/j.1539-6924.2011.01757.x