Gene George Associates Staff

Marvin BlakesleyTwenty-six years of oil and gas experience including two years of facility design & operation, three years of production operations, eight years of regulatory permitting and compliance, and thirteen years of environmental permitting and compliance.


Associate of Science Degree - Environmental Biology – Casper College - 1980
Associate of Applied Science Degree - Petroleum Technology – Casper College -1981

Professional Memberships

National Ground Water Association

Professional History

March 2008 to Present   Regulatory and Government Affairs Professional, Gene R George and Associates, Inc., Casper, Wyoming

January 1982 to January 2008   Marathon Oil Company, Cody, Wyoming


Knowledge of federal and state laws and regulations pertaining to regulatory and environmental compliance for oil and gas operations
Expertise in Wyoming Water Quality Rules and Regulations, Federal Clean Water Act (CWA), and National Pollution Discharge Elimination System (NPDES) regulations
Excellent relationships and contacts with Wyoming Department of Environmental Quality, Region 8 EPA, Bureau of Land Management, and Wyoming Oil and Gas Conservation Commission
Experience managing oilfield waste, including company owned industrial landfills and hazardous waste
Storm water management permitting, monitoring, and reporting expertise
Soil and pit remediation/reclamation expertise
Knowledge of Spill Prevention Control and Countermeasure (SPCC) Plans
Underground injection control permitting and reporting experience
Expertise with groundwater/soil monitoring and sampling, analysis of associated laboratory data and quality control
Experience with State Engineer and Army Corp of Engineer permitting of reservoirs
Experience coordinating and managing due diligence for oil and gas property acquisitions
Experience with state and federal permitting of oil and gas wells in Wyoming, Colorado, Utah, Nevada, and North Dakota
Several years of experience working with industry trade organizations including the Petroleum Association of Wyoming, American Petroleum Institute, and Rocky Mountain Health Environment and Safety Peer Group

Professional Career

Advanced Environmental Professional – Rocky Mountain Operations (2004 – 2007)

  • Oversight and management of environmental programs for the Big Horn Basin, Southwest Wyoming Operations, and Wind River Reservation.  Very active in industry trade groups including the Petroleum Association of Wyoming.  Reviewed and prepared comments on new and proposed regulations such as Storm Water Management, SPCC, NPDES, and Waters of the United States.  Represented company and provided testimony at various public hearings pertaining to new water standards and regulations.  Mentored and supervised new Environmental Professionals and Technician.

Environmental Professional – Rocky Mountain Operations (2000 - 2003)

  • Environmental permitting and compliance responsibilities for various oil and gas producing properties in the Big Horn Basin.  Environmental permitting and compliance responsibilities for Coal Bed Methane operations in the Powder River Basin.  Work included management of National Pollution Discharge Elimination System (NPDES) program for Rocky Mountain and Powder River Basin Operations.

Advanced and Senior Environmental Technician - Health, Environment,& Safety Staff (1995 – 1999)

  • Managed National Pollution Discharge Elimination System (NPDES) program for Rocky Mountain Operations.  Installed and sampled groundwater monitoring wells.  Managed oil field pit closure and remediation program.  Permitted underground injection wells for secondary recovery.

Engineering Technician – Regulatory Compliance Staff (1987 – 1994)

  • Prepared applications for permits (APD’s) to drill new wells on federal and fee lands in Wyoming, Utah, Nevada, Colorado and North Dakota.  Prepared various state and federal applications and reports for oil and gas activities.

Engineering Technician – Operations Staff (1984 – 1986)

  • Monitored production performance of wells and properties.  Supervised work over rigs.  Completed various reports for engineers and management.

Engineering Technician - Facilities Staff (1982 – 1983)

  • Facility design and construction.  Monitoring of equipment performance.  Supervised installation of new injection system for enhanced recovery project.

Professional Certifications and Training

OSHA 29 CFR 1910.120 (40-Hour Course)   May 1995
Annual Refreshers   1996-2008
Introduction to Federal Projects and Historic Preservation Law   July 1991
Safety Training Observation Program   August 1991
Blood Born Pathogen Exposure and Control   September 1993 - Present
Gas, Oil, and Environmental Biotechnology   December 1994
Environmental Regulation Course   December 1994
Hazardous Material   March 1995
Federal Unitization/Communitization   April 1995
Inland Waters and Oil Spill Response Course   May 1995
Environmental Chemistry, Sampling, and Analysis  August 1995
Lead Exposure Control January   1996 - Present
DOT NORM Exposure Control March   1996 - Present
H2S Exposure Control/Respiratory Protection   September 1996 - Present
Hazard Communication   September 1996 - Present
Asbestos Awareness   September 1996 - Present
Site Remediation and Restoration   October 1996
OSHA Health and Safety Compliance   March 1997
Basic Safety Awareness   July 1997
RECRA Regulations   January 1998
Hydrocarbon Pattern Recognition and Dating   October 1998
Implementing Natural Attenuation for Hydrocarbon Contaminated Sites   October 1998
Environmental Awareness   December 1998
Wildlife and Oil Spill Response Training   June 1999
NPDES Enforcement Workshop   February 2000
Media Relations   April 2001
Storm Water Management and Construction   December 2007