Midwest 2016 Gas Leak Public Information Sheet

Media Contact: Audrey Gray
Phone: 307-577-9737

Public Health Updates:

  • Indoor air quality sampling using summa canisters over an 8 hour period was conducted on June 16 and 17, 2016 at Midwest The results were provided to experts at the Agency for Toxic Substances and Disease Registry (ATSDR) for technical review. ATSDR will provide an analysis of these results for public release in a formal technical report. This report will contain details about compounds identified in the air at the school, the concentration of these compounds, and the public health implications of exposure of adults and children to these compounds. This report is currently pending clearance at the federal agency level. This report will be released once it is available.
  • Environmental sampling in the school has identified carbon dioxide (CO2) and multiple types of volatile organic compounds (VOCs) in measurable Hydrogen sulfide (H2S) has not been identified in air samples in the school to-date.
  • No single substance found in the air at the school on June 16 and June 17 exceeded ATSDR and/or EPA indoor air quality recommended The recommended thresholds represent concentrations of substances in the air in which humans (adults and children) might be exposed daily over long periods of time and not experience adverse health effects. In sum, no single substance was found in the air at the school on June 16 and June 17 at a level that indicated a risk for acute human health effects.
  • Unfortunately, we do not know what the indoor air quality within the school looked like prior to the initial testing conducted on May We know that dangerous levels of carbon dioxide (CO2) and volatile organic compounds (VOCs) were detected in the school on May 25 via hand-held air sampling monitors, which prompted the evacuation of the school. The air quality on June 16 and June 17 was remarkably better than the conditions documented on May 25.
  • The air quality summa canister testing completed on June 16 and June 17 in the school represents a single data point, a snapshot in time, of the indoor air quality in Midwest The air quality in the school likely fluctuates daily depending on a variety of natural and man-made factors. Public health agencies and our partners are currently working on plans to ensure that air quality in the school is safe at all times and identified risks to indoor air quality are mitigated.
  • The Casper-Natrona County Health Department provided a draft list of recommendations to the Natrona County School District for re-opening and re-occupying the The recommendations include development of an indoor air quality mitigation plan to address the known air quality issues, implementation of the mitigation/protective measures at the school, another round of air quality sampling post-mitigation to confirm that mitigation efforts were successful and that the school is ready to be re-occupied, the development of an indoor air quality monitoring plan, placement of carbon dioxide (CO2) monitors in the school as part of the air quality monitoring plan, and development of a response plan for if/when future indoor air quality problems are identified in the school.
  • The Casper-Natrona County Health Department and the Wyoming Department of Health have completed 139 human health surveys among staff and students at the Epidemiologists from the Wyoming Department of Health will be analyzing the results of these surveys to describe the frequency of self- reported adverse health effectives experienced by individuals who were in the school daily, healthcare utilization, and health concern data. The data analysis process will likely take several weeks to complete. A final epidemiologic report will be published by the Wyoming Department of Health and will be made publically available once complete.
  • Public health officials support the re-opening of the school if the post-mitigation, air quality sampling demonstrates that all substances in the air within the school are at concentrations that are protective to human health and once the school district is able to implement the recommended indoor air quality monitoring and response

Natrona County School District #1

  • School activities for Midwest School students and staff will be at Westwood Elementary school for Pre-K through 8th grades and at Roosevelt/PIC Building for 9th through 12th grades until Midwest School is safe to occupy per public health officials’
  • No person is allowed to enter the Midwest School property without prior coordination and approval from the Natrona County School District Executive Director of
  • The school district is currently in the process of hiring an independent consultant for industrial hygiene to advise the school district on current and future mitigation strategies to ensure public health and safety of staff, students, and visitors to Midwest

FDL Operating, LLC Updates:

  • FDL is maintaining an information contact number at (307) 462-9112 for any questions or concerns from the residents of
  • The company conducted a comprehensive search for additional point sources of No additional incidents were reported or discovered beyond this isolated incident
  • Company teams have completed a comprehensive evaluation of every well bore drilled within ½ mile of the
  • FDL teams successfully sealed a well adjacent to the
  • FDL has retained an environmental consulting company to advise FDL on soil remediation options at the Midwest
  • Monitoring of wells and analysis of current and future operations surrounding the school is
  • Under guidance of the Agency for Toxic Substances and Disease Registry, a comprehensive gas sampling plan for the Midwest school was completed on June 16 and June Results have been turned over to the Casper-Natrona County Health Department and to the Agency for Toxic Substances and Disease Registry for interpretation and public health review and interpretation.
  • FDL Operating is working with the Midwest Town Council to provide additional gas monitoring throughout the FDL staff are available to check Midwest and Edgerton homes and businesses for abnormal gasses 24-hours a day. Requests may be made by calling 307-462-9112 or 307-437-9500

Department of Environmental Quality Updates:

  • DEQ continues to support the Wyoming Oil and Gas Conservation

Wyoming Oil and Gas Conservation Commission

  • The WOGCC has worked with FDL to evaluate and determine procedures to work on and seal wells near the Midwest school and the town of
  • The WOGCC will continue to work with FDL on installation of monitor and mitigation wells, and will evaluate future operations in the area

Bureau of Land Management

  • Receiving daily updates from FDL
  • Working with FDL Operating on federal regulatory issues surrounding the gas

Town of Midwest

  • Distributed letters to all Midwest residents to offer monitoring and testing to assist in determining if the gas leak is isolated to Midwest
  • Provide assistance to the coordinating group to distribute information to Midwest


Recent News