Pavillion, Wyoming Groundwater Quality Investigation

U.S. Environmental Protection Agency (EPA) Investigation

The following materials represent various documents relating to the EPA’s Pavillion, Wyoming groundwater quality investigation. Where possible, the Center has provided viewable copies of these documents. Nevertheless, it may be necessary to access some of these materials through the EPA online research database.

EPA’s Final Review of Wyoming DEQ’s Pavillion, Wyoming Area Domestic Water Wells Final Report and Palatability Study (Dec. 22, 2016)

EPA Technical Comments on Wyoming DEQ’s Draft Final Report (Mar. 21, 2016)

U.S. EPA provided substantive input to the state of Wyoming through research on wellbore integrity and field pits as well as technical comments to support their investigation (Mar. 25, 2014), including:

• Pavillion Gas Well Integrity Evaluation (EPA Region 8, July 2013)
• Pavillion Oil & Gas Field Pits Evaluation (EPA Region 8, July 2013)
• Oil & Gas Field Pits Evaluation: Appendices A-B
• Oil & Gas Field Pits Evaluation: Appendix C
• Oil & Gas Field Pits Evaluation: Appendix D
• Oil & Gas Field Pits Evaluation: Appendices E-F

Notice to Discontinue Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, Wyoming, 78 FR 55694 (Sep. 11, 2013)

EPA Press Release – “Wyoming to Lead Further Investigation of Water Quality Concerns Outside of Pavillion with Support of EPA” (Jun. 20, 2013) 

• EPA stated, “While EPA stands behind its work and data, the agency recognizes the State of Wyoming’s commitment for further investigation and efforts to provide clean water and does not plan to finalize or seek peer review of its draft Pavillion groundwater report released in December 2011. Nor does the agency plan to rely upon the conclusions in the draft report.”

Notice of Extension of Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, WY, 78 FR 2396 (Jan. 11, 2013)

Notice of Extension of Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, WY, 77 FR 62234 (Oct. 12, 2012)

The U.S. Geological Survey (USGS) released two data reports at the request of U.S. EPA (Sep. 26, 2012):

• Groundwater-Quality and Quality-Control Data for Two Monitoring Wells near Pavillion, Wyoming, April and May 2012
• Sampling and Analysis Plan for the Characterization of Groundwater Quality in Two Monitoring Wells near Pavillion, Wyoming

Notice of Extension of Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, WY, 77 FR 19012 (Mar. 29, 2012)

EPA News Release – “Statement on Pavillion, Wyoming groundwater investigation” (Mar. 8, 2012) (EPA issued a statement delaying the peer-review of the draft report “until a report containing the USGS data [was] publicly available.”)

Notice of Extension of Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, WY, 77 FR 3770 (Jan. 25, 2012)

Notice; Request for Nominations for Peer Reviewers for the Draft Research Report Entitled, “Investigation of Ground Water Contamination Near Pavillion, WY, 77 FR 2292 (Jan. 17, 2012)

Notice of Public Comment Period; Draft Research Report: Investigation of Ground Water Contamination Near Pavillion, Wyoming, 76 FR 77829 (Dec. 14, 2011)

Draft Report of Investigation of Ground Water Contamination near Pavillion, Wyoming (Dec. 2011)

• EPA Press Release – “EPA Releases Draft Findings of Pavillion, Wyoming Ground Water Investigation for Public Comment and Independent Scientific Review (Dec. 8, 2011)

Sampling Results and Site Update for the Pavillion Area Groundwater Investigation (Jan. 2010)

Analytical Results Report (ARR) for the Pavillion Area Groundwater Investigation (Aug. 2009)