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					Casing Diagram
Protecting Ground H20 Aquifers –
       Trenton-Black River
Protecting Ground H20 Aquifers –
         Marcellus Shale

      0’
                  conductor casing
                                         Groundwater Aquifers
      500’         wellbore wall
                  surface casing
      1000’
                 intermediate casing
      1500’

      2000’   *casing width has been
               exaggerated for clarity

      2500’     drill pipe


      3000’

      3500’

      4000’

      4500’

      5000’

      5500’

      6000’                                        drill bit

                                                               Marcellus
      6500’