Marc E. Gentry


Mr. Gentry is a Principal with Ensolum and an experienced geoscientist with over 21 years of experience conducting due diligence, risk-based investigations and remediation projects nationwide and is a licensed Professional Geoscientist in the State of Texas, a licensed Professional Geologist in the State of Tennessee, and a Registered Geologist in the State of Arizona. Mr. Gentry focuses his practice on the risk management and redevelopment of impaired properties related to historic exploration and production, midstream, and petrochemical activities and projects requiring risk-based site assessment and remediation. He is skilled in the technical aspects of project management as well as project team building, scheduling and budgeting nationwide risk-based site assessments and remediation, oil and gas compliance, and due diligence services. He is experienced in regulatory authority and stakeholder negotiations and has successfully coordinated with federal, state and local regulatory agencies to assist clients with case closures.

Mr. Gentry has managed groups of geoscientists, engineers, and environmental professionals conducting environmental site assessments, risk-based investigations and corrective action activities for sites regulated by the Railroad Commission of Texas (RRC), Site Remediation Group and Volunteer Cleanup Program and Texas Commission on Environmental Quality (TCEQ) Corrective Action Section, Voluntary Cleanup Program and Leaking Petroleum Storage Tank Program utilizing RBCA and non-RBCA environmental programs. He has successfully completed projects and negotiated with regulatory authorities in Arizona, Oklahoma, Louisiana, Ohio, North Carolina, Florida, Tennessee, New Mexico, Colorado and Hawaii and has conducted pre purchase and post divestiture due diligence of portfolio projects including upstream, midstream, terminals and retail assets. Additionally, Mr. Gentry has provided expert reports and assisted litigation and arbitration cases involving response cost allocations and allegations of groundwater, soil and surface water contamination.

Mr. Gentry has utilized a wide range of remediation technologies including in situ chemical injection, dual-phase extraction, bioremediation, soil vapor extraction, air-sparging and natural attenuation based upon site specific conceptual models. In addition, he has prepared formal bid solicitations for site assessment and remediation contracts for private and government entities. He served as senior geoscientist in responsible charge for the remediation of the MW-109 Area at the Turtle Bayou Superfund Site utilizing in-situ chemical injection and ex-situ bioremediation under the supervision of the US Army Corps of Engineers (USACE) and Environmental Protection Agency (EPA). He assisted the USACE with underground storage tank removals at the Corpus Christi Army Depot/Naval Air Station and was a member of the Superfund Technical Assistance Response Team for the Columbia Shuttle Recovery.

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