Draft Resource Report 6 of Wabash Gas Storage, LLC under PF11-6-000.

Pre-filing Draft Resource Report 6 Geological Resources Wabash Gas Storage, LLC Wabash Gas Storage Project Edgar County, Illinois FERC Docket No. PF11-6-000 Volume I Public Information November 15, 2011 Pre-filing Draft Resource Report 6 Geological Resources Wabash Gas Storage, LLC T Township TD total depth TDS total dissolved solids TVD true vertical depth UIC Underground Injection Control USEPA United States Environmental Protection Agency USGS United States Geological Survey W west Wabash Wabash Gas Storage, LLC Wabash-Midwestern Interconnect Wabash-Midwestern interconnect location at Paris Compressor Station XRD X-ray Diffraction XRMI Extended Range Micro Imaging Tetra Tech November 15, 2011 v Pre-filing Draft Resource Report 6 Geological Resources Wabash Gas Storage, LLC TABLE OF CONTENTS RESOURCE REPORT 6 GEOLOGICAL RESOURCES ..........................................................1 6.1 Geologic Setting ......................................................................................................2 6.1.1 Physiography and Surficial Geology.......................................................................... 2 6.1.2 Regional Geology ...................................................................................................... 3 6.1.2.1 Key Structural Features ............................................................................. 4 6.1.2.2 Stratigraphy................................................................................................ 4 6.1.2.3 Gas Storage in the Illinois Basin ................................................................ 5 6.1.3 Project Area Geology................................................................................................. 6 6.1.3.1 Prior and Current Operations in the Elbridge and Nevins Structures ........ 6 6.1.3.2 Available Project Area Data ....................................................................... 8 6.1.4 Storage Site Geology............................................................................................... 11 6.1.4.1 Storage Reservoir .................................................................................... 11 6.1.4.2 Cap Rock ................................................................................................. 15 6.1.4.3 Abandoned Well Bore Integrity ................................................................ 19 6.1.4.4 Water Disposal Zones.............................................................................. 21 6.2 Blasting ..................................................................................................................24 6.3 Mineral Resources.................................................................................................25 6.3.1 Oil and Natural Gas ................................................................................................. 25 6.3.1.1 Conventional Oil & Natural Gas ............................................................... 25 6.3.1.2 Shale Oil and Nat