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Water: Hydraulic Fracturing

Technical Workshop Proceedings

US EPA Proceedings of the Technical Workshops for the Hydraulic Fracturing Study

In its Fiscal Year 2010 Appropriations Report, the U.S. House of Representatives Appropriation Conference Committee identified the need for a focused study on the relationship between hydraulic fracturing and drinking water resources. EPA scientists, under this Administration and at the direction of Congress, are undertaking a study to better understand any potential impacts of hydraulic fracturing (HF) on drinking water resources. The scope of the proposed research includes the full lifespan of water in HF, from acquisition of the water, through the mixing of chemicals and actual fracturing, to the post-fracturing stage, including the management of flowback and produced water and its ultimate treatment and disposal.

EPA held four technical workshops from February through March 2011 to explore the following focus areas:

  • Chemical & Analytical Methods, February 24-25;
  • Well Construction & Operations, March 10-11;
  • new Fate & Transport, March 28-29; and
  • Water Resource Management, March 29-30.
    (See Tabs below for more information on these workshops)

The goal of the technical workshops was three-fold:

  1. Inform EPA of the current technology and practices being used in hydraulic fracturing,
  2. Identify research related to the potential impacts of hydraulic fracturing on drinking water resources, and
  3. Provide an opportunity for EPA scientists to interact with technical experts. EPA invited technical experts from the oil and natural gas industry, consulting firms, laboratories, state and federal agencies, and environmental organizations to participate in the workshops.

EPA will use the information presented in these abstracts and presentations to inform research that effectively evaluates the relationship between HF and drinking water.

Chemical & Analytical Methods


The Proceedings from the Chemical & Analytical Methods workshop include a summary of the presentations and discussion sessions as well as abstracts for each presentation. Not all presenters submitted an abstract or presentation to be posted for public viewing.The presentations are not part of the Proceedings, but may be downloaded below along with the individual abstracts.

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.


Presentations and Individual Abstracts

To cite information found in the abstract, use the following:
Author. 2011. Title of Abstract. Proceedings of the Technical Workshops for the Hydraulic Fracturing Study: Chemical & Analytical Methods, Arlington, Virginia.
Publication No. EPA 600-R-11-066.

To cite information found in the presentation, use the following:
Author. 2011. Title of Presentation. Presented at US EPA Technical Workshop for the Hydraulic Fracturing Study: Chemical & Analytical Methods, Arlington, Virginia.


Fracture Fluid Chemistry Theme


Fingerprinting Theme


Field and Analytical Challenges Theme

  • Technical Presentation Session 7: Sampling Issues – Representativeness, Handling, Preservation
    • Representativeness of Flowback Fluid Samples:
      Impacts of Post-Withdrawal Evolution and Temporal Variability of Composition*
      Presented By: Mark Engle, USGS
      * The author did not contribute an abstract or presentation for the proceedings.

Well Construction & Operations


The Proceedings from the Well Construction & Operations workshop include a summary of the presentations and discussion sessions as well as abstracts for each presentation.



You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.


Presentations and Individual Abstracts

The presentations are not part of the Proceedings, but may be downloaded below along with the individual abstracts.

To cite information from the abstract, use the following:
Author. 2011. Title of Abstract. Proceedings of the Technical Workshops for the Hydraulic Fracturing Study: Well Construction & Operations, Arlington, Virginia.
Publication No. EPA 600-R-11-046.

To cite information from the presentation, use the following:
Author. 2011. Title of Presentation. Presented at US EPA Technical Workshop for the Hydraulic Fracturing Study: Well Construction & Operations, Arlington, Virginia.


Well Construction Theme


Fracture Design and Stimulation Theme


Well Integrity Theme

Fate & Transport


The Proceedings from the Fate & Transport workshop include a summary of the presentations and discussion sessions as well as abstracts for each presentation.



  • The full Proceedings from the Fate & Transport workshop:


    You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

    US EPA. 2011. Proceedings of the Technical Workshops for the Hydraulic Fracturing Study: Fate & Transport. (PDF) (122 pp, 2MB)
    Notice: The views expressed in these Proceedings are those of the individual authors and do not necessarily reflect the views and policies of the US Environmental Protection Agency (EPA). Any mention of trade names or commercial products does not constitute endorsement or recommendation for use.
    EPA 600-R-11-047, May 2011

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Presentations and Individual Abstracts

The presentations are not part of the Proceedings, but may be downloaded below along with the individual abstracts.

To cite information from the abstract, use the following:
Author. 2011. Title of Abstract. Proceedings of the Technical Workshops for the Hydraulic Fracturing Study: Fate & Transport, Arlington, Virginia.
Publication No. EPA 600-R-11-047.

To cite information from the presentation, use the following:
Author. 2011. Title of Presentation. Presented at US EPA Technical Workshop for the Hydraulic Fracturing Study: Fate & Transport, Arlington, Virginia.


Contaminant Identification, Transformation & Transport Theme


Impacts of Hydraulic Fracturing on Natural Transport Systems Theme


Models to Predict Transport Theme


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Water Resources Management

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