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View Diary: Fact Checking Josh Fox/Gasland #2; Oil/Gas Industry NOT Exempt from Clean Air/Clean Water Acts (133 comments)

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  •  In a porous area (2+ / 0-)
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    dewley notid, marina

    It certainly is a discharge into surface waters.

    When surface waters go underground, then surface again, discharging underground is discharging into surface waters.

    Women create the entire labor force. ---------------------------------------------------------------------------------------- Sympathy is the strongest instinct in human nature. - Charles Darwin

    by splashy on Sun Jul 07, 2013 at 01:17:03 PM PDT

    [ Parent ]

    •  Not when you are injecting fluids at (0+ / 0-)

      a point that is several thousand feet below the surface.  Such underground injection can never be shown to be related to a surface water discharge....both physically and under the regulatory authority of the Clean Water Act.

      •  What if it's in the mountains (0+ / 0-)

        With a karst kind of base?

        I'm not completely sure how to say things.

        I do know that caves can go that far underground, so if something is injected into them and then breaks through close to the surface it could pollute the groundwater in that area.

        I look at some springs that come up that have been traced to far away, and wonder ...

        Women create the entire labor force. ---------------------------------------------------------------------------------------- Sympathy is the strongest instinct in human nature. - Charles Darwin

        by splashy on Tue Jul 09, 2013 at 03:02:13 AM PDT

        [ Parent ]

        •  Karst Topography must (0+ / 0-)

          be protected by both surface and intermediate casing cementing operations, but it is not vulnerable to
          intrusion if those casings are properly cemented as the ultimate discharge point for injection will be many more thousands of feet below ground below millions of tons of impervious rock.

          However, you are very correct to point out that karst topography poses some substantial difficulties that must be addressed and overcome in the design of hydrocarbon wells and their finishing.

          Wells are cemented by pumping cement in from the bottom up.   If there are voids encountered, or if there is a pressurized artesian aquifer, that must be addressed during installation and completion of the casings.

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