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Marcellus Shale Coalition Membership

Executive Board Member Companies Board Member Companies

Chesapeake Energy Corporation AKA Energy Anadarko Petroleum EXCO Resources (PA), LLC Atlas Energy MarkWest Liberty Midstream & Resources, LLC Burnett Oil Company Pennsylvania General Energy Company Cabot Oil and Gas Corporation Range Resources Carrizo Oil & Gas, Inc. Talisman Energy USA Chevron Williams Chief Oil & Gas XTO Energy DTE Pipeline Company Energy Corporation of America Enerplus Resources USA EOG Resources Inc. EQT Corporation Hess Inc. Hunt Marcellus Operating Company, LLC Inflection Energy J-W Energy Mitsui E&P USA Newfield Exploration Company NiSource Gas Transmission & Storage Noble Energy Novus Operating PDC Mountaineer Penn Virginia Oil & Gas Corporation Peoples Natural Gas PVR Midstream Rex Energy Corporation Seneca Resources Corporation Shell Southwestern Energy Statoil Sumitomo Corporation of America Tenaska Triana Energy UGI Energy Services Ultra Resources WPX Energy

(Please see reverse side for additional member companies.) Membership as of March 2012 MembershipAssociate Members (cont.)

Associate Members

Acorn Energy Dawood Engineering Hull & Associates Accutest Laboratories Dechert LLP Independence Excavating Advanced GeoServices Dell Fastener Corporation Industrial EcoSystems AECOM Dewberry INTERTECH Security Aerotek Diamond Technical Services IPS Engineering/EPC Allan A. Myers Dixie Construction Company Inc. Jackson Kelly ALS Environmental DLA Piper JMC Steel Group Altela Inc. Drill Baby Drill Staffing JMT Johnson, Mirmiran & Thompson Amerimar Realty Company Duncan Land Services John T. Boyd Company AMEC Eckert Seamans Cherin & Mellot K&L Gates Appalachian Oil Purchasers Edgen Murray Keane Frac Aqua America Emera Energy Key Energy Services Aquatech Entech Engineering Kleinfelder ARCADIS-US Environmental Drilling Solutions KPMG ARCHER, The Well Company Environmental Service Laboratories Kroff Well Services ARM Group Inc. Environmental Standards L.R. Kimball & Associates ATCO Noise Management ERM Lafarge North America AVT Inc. Eureka Resources Lancaster Laboratories Babst Calland Express Energy Services Langan Engineering and Baker Hughes EXTERRAN Environmental Services Barrett Industries/IA Industries Falcon Drilling Benchmark Analytics Fisher Associates Larson Design Group/TerrAqua Benesch Fluids Management Resource Management Bergmann Associates FMC Corporation Laurel Aggregates Bishop Brothers Construction Co. Force Incorporated Layne Christensen Company Blackhawk Specialty Tools Fox Rothschild Lewis Environmental BL Companies FTS International LJ Stein & Company Boots & Coots Fulbright & Jaworski Lowe’s Home Improvement Borton-Lawson Engineering G.A. & F.C. Wagman M. Davis & Sons Bourland & Leverich Supply Company G4S Secure Solutions USA MAGUIRE Group Bravo Group GAI Consultants Manko, Gold, Katcher & Fox Buchanan Ingersoll & Rooney Gannett Fleming Mascaro Construction Company Buchart Horn Gas Technology Institute MATCOR Inc. Burleson LLP Gilmore & Associates McCarl’s Inc. Capstone Turbine Distributor, E-Finity Glenn O. Hawbaker McClure Company Casella Waste Systems Golder Associates McGuireWoods CDM Smith Greenberg Traurig McKissack & McKissack CESI Chemical Greenhorne & O’Mara McNees Wallace & Nurick CHA Inc. Groundwater & Environmental Services McTish, Kunkel & Associates Chapman Corporation H20 Resources/WaterTrac Michael Baker Corporation Chester Engineers Halliburton Energy Services ModSpace Civil & Environmental Consultants Hartman & Hartman MSA Clean Harbors Hart Resource Technologies MWH Cleveland Brothers Equipment Hatch Mott MacDonald Nalco Company Coldwell Banker Real Estate Services HDR Engineering National Oilwell Varco Complete Production Services Henkels & McCoy National Vacuum Corp. Conestoga-Rovers & Associates Herschell Environmental Nemacolin Woodlands Resort Contech Construction Products High Industries/High Real Estate Group New Enterprise Stone Lime Co. Inc. Contract Land Staff (CLS) Hoffman Construction Services New Pig Corporation Crescent Directional Drilling Holcim US New Tech Global CSD Engineers Holloman NuWeld CUDD Energy Services HomeWaters Retreats Cummings/Riter Consultants Honeywell Safety Products HRG Herbert, Rowland & Grubic HRI

Membership (cont.)

O’Brien & Gere T&M Associates Ogletree, Deakins, Nash, Smoak & Stewart Taylor Wiseman & Taylor Orion Drilling Tensar International Corporation Company TestAmerica Laboratories P. Joseph Lehman Inc. Tetra Tech Pace Analytical Services Terra Services Packers Plus The Chartwell Law Offices ParenteBeard The EADS Group Penn E & R The Gateway Engineers Pennoni Associates The Lane Construction Corporation Pennsy Supply The Sadler Law Firm Pennsylvania American Water The Shaw Group Penn United Technologies The West Firm Pepper Hamilton LLP TMK IPSCO Percheron Acquisitions LLC Total Equipment Company Petroleum Products/Maxum Petroleum Total Safety PGT Trucking TRC Pipeco Services Trican Well Service PJ Dick-Trumbull Corporation Twilight Services PPG Industries United States Steel Corporation Protechnics (a Division of Core Laboratories) UniversalPegasus International Prudential Preferred Realty Universal Well Services Purestream Technology Urban Engineers PwC (PricewaterhouseCoopers) URS Corporation ReedSmith USA Compression Reserved Environmental Services Utility Line Services RETTEW Valerus Ridge Global Vallourec & Mannesmann USA River Chemical & Energy, a River Development Corporation Veolia Environment North America RPM Industries Inc. Wallace & Pancher Inc. Russell Standard Corporation Waste Management S.R. Wojdak & Associates Weatherford International SAIC Weavertown Environmental Group Saul Ewing LLP Weston Solutions Saxon Drilling West Penn Energy Services Schlumberger Oilfield Services West Physics Consulting Schramm Inc. Wilkinson & Associates Sci-Tek Consultants Inc. Willbros Engineering Select Energy Services Williams Scotsman Sevenson Environmental Services Womble Carlyle Ecology Innovations SGC Engineering Womble Carlyle Sandridge & Rice LLC Shallenberger Construction WorleyParsons Skelly and Loy SSM Group Stahl Sheaffer Engineering Stallion Oilfield Services Stantec Steptoe & Johnson STRAD Oilfield Services Suit-Kote Corporation Sunnyside Supply Superior Well Services Sustainable Resources Group

Membership as of March 2012