About Mr. Gregory Rudolf Tan

Greg Tan represents clients in environmental enforcement actions brought by federal, state and tribal agencies, helps clients navigate regulatory requirements, manage environmental risk, and persue permits and approvals necessary to move forward with development projects, real estate transactions, and day-to-day business operations.

Greg has 28 years of experience handling environmental enforcement matters both as a former agency enforcement attorney and on behalf of his clients in the regulated community. Greg has litigated and settled a wide variety of civil, criminal, and administrative enforcement actions brought by federal, state, local and tribal agencies under the Clean Water Act (CWA), Clean Air Act (CAA), Resource Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), Emergency Planning and Community Right to Know Act (EPCRA), and other federal, state, tribal and local laws. He has also represented clients in CERCLA litigation among potentially responsible parties (PRPs).

Greg counsels clients on regulatory compliance arising under federal and state environmental statutes and represents clients before local government bodies throughout the Denver metro area to obtain land use permits and approvals for development projects. He also appears before state administrative commissions in rulemaking matters. Greg also advises developers, investors and lenders on the environmental aspects of real estate transactions, including environmental due diligence and negotiating environmental provisions in deal documents.

Prior to joining the firm, Greg led CERCLA, CWA, and CAA enforcement cases at the U.S. Environmental Protection Agency’s Atlanta regional office. Greg also counseled the EPA’s regional air program on matters related to Title V permitting and NAAQS designations. Earlier in his career, he practiced land use law in Atlanta.

Concentrations

•Environmental
•Land development
•Litigation
•Administrative law
•Renewable energy
•Utilities law
•Environmental aspects of business transactions
•Global energy & infrastructure

Recognition & Leadership

Awards & Accolades

•Listed, Lawdragon, 500 Leading U.S. Environmental & Energy Lawyers guide, 2021-2026
•Team Member, U.S. News - Best Lawyers, Best Law Firms Edition, 'Law Firm of the Year,' Environmental Law, 2016
•Recipient, two 'U.S. Department of Justice Certificates of Commendation,' for outstanding performance and invaluable assistance in support of DOJ's Environment and Natural Resources Division on major CWA and CAA judicial settlements
•Recipient, EPA National Awards, including two gold medals, a silver medal and two bronze medals, for contributions to enforcement matters

 

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Services

Areas of Law

  • Environmental Law 1
    • Environmental
  • Litigation
  • Energy 2
    • Energy & Natural Resources
    • Energy Transactions
  • Public Finance 1
    • Infrastructure
  • Natural Resources 1
    • Mining

Practice Details

  • Firm Information
    Position
    Of Counsel
    Firm Name
    Greenberg Traurig, LLP
  • Representative Cases & Transactions
    Cases
    Experience: Environmental Enforcement, Permitting,
    Compliance: Clean Water Act : Represented natural gas producer in connection with EPA enforcement action pursuant to Section 404 of the CWA relating to construction of well pads
    in-stream farm ponds.
    Represented national retail developer on nationwide CWA Storm Water Program compliance
    enforcement matters brought by the U.S. EPA.
    Represented national home builder
    a Colorado highway contractor on CWA
    Colorado Storm Water Program compliance
    enforcement matters.
    Represented U.S. EPA in an enforcement action against a national pipeline company arising from spills from the company's pipelines to waters in several states, resulting in the largest civil penalty a company had ever paid. United States of America v. Colonial Pipeline Company, 1:00-CV-3142 (N.D. Ga. 2003).
    Solid
    Hazardous Waste : Represented El Paso Natural Gas Co. in litigation pursuant to Uranium Mill Tailings Radiation Control Act (UMTRCA)
    RCRA relating to alleged uranium mill tailings contamination on Navajo
    Hopi Reservations. EPNG v. U.S., 07-CV-00905 (D.D.C.)
    EPNG v. U.S., No. 10-5080 (D.C. Cir.).
    Represented owner of former automotive center in defense of federal action under RCRA
    CERCLA,
    state class action lawsuit alleging diminution of property value, in connection with the Maryl
    Square PCE Plume in Las Vegas, Nevada, winning dismissal of both actions. Voggenthaler v. Maryl
    Square, LLC, No. 2:08-cv-1618 (D. Nev.),
    Voggenthaler v. Al Phillips the Cleaner Inc., No. A553784 (Dist. Ct., Clark County).
    Represented U.S. EPA in l
    mark three-party effort to address extensive environmental contamination in the Copper Basin Mining District of Tennessee. Negotiated a Memor
    um of Underst
    ing among OXY USA, the Tennessee Department of Environment
    Conservation (TDEC),
    the U.S. EPA,
    several administrative settlement orders under which the parties conducted investigation
    cleanup work in the 35 square mile impacted area.
    Represented metal plating firm in connection with Colorado solid
    hazardous waste enforcement, permitting
    compliance matters.
    Represented energy company in connection with EPA enforcement
    CERCLA cost recovery matters relating to former uranium mine located in New Mexico.
    Represented energy company in connection with EPA enforcement
    CERCLA cost recovery matters relating to former uranium mines located in Arizona.
    Represented U.S. EPA in numerous CERCLA enforcement matters resulting in administrative
    judicial cost recovery settlements with PRPs.
    Clean Air Act : Represented Colorado Interstate Gas Company in defense of a Clean Air Act enforcement action alleging violations of the federal NESHAPs, NSPS
    PSD programs, for which CIG agreed to pay a penalty in the amount of $987,757, to pay permit fees in the amount of $32,243
    to perform an ambient air monitoring Supplemental Environmental Project for a period of two years. U.S. v. Colorado Interstate Gas Co., No. 2:09-cv-00649-TS (D. Utah 2009).
    Represented U.S. EPA in multi-state settlement addressing alleged PSD/NSR violations at company oilseed processing facilities resulting in $1.6 million penalty
    an estimated $130 million in injunctive relief, primarily in the form of pollution controls. United States of America v. Cargill Incorporated, No. 05-2037 (D. Minn. 2005).
    Represented national disaster response firm in connection with CAA Asbestos NESHAP program enforcement
    compliance matters.
    Represented oxygenate blender in connection with EPA CAA Fuels Program registration
    compliance matters, including advice regarding RIN transactions
    related renewable fuels compliance matters.
    Represented U.S. EPA in numerous CAA Title V petition matters
    in defensive litigation arising from NAAQS designations.
    Rulemaking, Utility Rate Cases,
    Regulatory Matters: Represented trade group in connection with filing of amicus curiae brief to the Colorado Supreme Court in appeal of a ruling that Lone Pine Orders are not permitted under Colorado law in complex hydraulic fracturing or other oil
    gas-related toxic tort cases. Antero Resources Corp. v. Strudley, No. 13-SC-576 (2013).
    Represented Colorado Interstate Gas Co. in connection with 2008 Colorado Oil
    Gas Rulemaking
    related Pipeline Safety Act
    Natural Gas Act preemption matters
    rulemaking proceedings.
    Represented municipality
    ski resort in effort to defeat Public Service Company of Colorado's second attempt at a proposed environmental tariff. Docket No. 10AL-908E & Decision No. C12-0158.
    Represented group of six ski resorts in connection with Public Service Company of Colorado's 2009 electric rate case, including successful effort to defeat first of its kind broad form environmental indemnity
    environmental agreement,
    costly dem
    ratchet. Docket No. 09AL-299E & Decision No. C10-0286.
    Represented national wind energy firm in connection with the 2008 Colorado Resource Plan proceedings before the Colorado PUC. Docket No. 07A-447E.
    Environmental Auditing: Represented national wireless telecommunications firm in connection with national environmental audit examining compliance with EPCRA, CWA, CAA
    RCRA pursuant to Audit Agreement with the U.S. EPA.
    L
    Use: Represented national retail developer on numerous projects throughout the Denver metro region obtaining permits
    approvals needed for retail developments.
    Represented national oil
    gas company in connection with obtaining approvals to develop new gas station.
    Represented national wireless telecommunications company in connection with noise complaints
    city enforcement action arising from rooftop chillers.
    Advised redevelopment company on l
    use
    zoning matters in connection with redevelopment of St. Anthony's Hospital.
    Advised private equity firm on l
    use
    zoning matters in connection with transit-oriented redevelopment project at RTD's Alameda Station.
    Advised real-estate investment firm on l
    use
    zoning matters in connection with redevelopment of restaurant
    lodge in Aspen.
    Public-Private Partnerships (P3): Represented MAT Concessionaire, LLC
    its sponsors, Meridiam Infrastructure Fund
    Bouygues Travaux Publics, S.A., in the Port of Miami Tunnel project, one of the first greenfield public-private partnerships in the United States.
    Government Experience: Assistant Regional Counsel, U.S. Environmental Protection Agency, 1999-2007
    Internships: Law Clerk, Attorney General's Environmental Law Practice Group, New Jersey Attorney General's Office, 2008-2009
    Judicial Extern, Hon. Dolores K. Sloviter, U.S. Court of Appeals for the Third Circuit, 2008
    Judicial Extern, Hon. Barry T. Albin, New Jersey Supreme Court, 2007
  • Additional Links

Experience

  • Bar Admission & Memberships
    Admissions
    2007, Colorado
    U.S. Court of Appeals for the Ninth Circuit
    U.S. Court of Appeals for the Tenth Circuit
    U.S. District Court for the District of Colorado
    U.S. District Court for the Northern District of Georgia
    1998, Georgia
    Memberships

    Professional & Community Involvement

    •Board of Directors, Environmental Council of the States (ECOS), 2021-2026
    •Board Member, Arvada Council for the Arts and Humanities, 2010-2014
    •Member, Colorado Business Committee for the Arts, Leadership Arts Program, 2011-2012
    •Member, Parks, Recreation, Open Space and Trails Advisory Committee, Town of Superior, 2009-2011
    •Member, American Bar Association
    •ABA Section of Environment, Energy and Resources
    •ABA Advisory Panel
    •Member, Boulder County Bar Association
    •BCBA Natural Resources and Environmental Law Section
    •Member, Colorado Bar Association
    •Environmental Law Section
    •Environmental Law Section Advisory Council, 2012-Present
    •Member, Denver Bar Association
    •Member, Rocky Mountain Mineral Law Foundation

  • Education & Certifications
    Law School
    Vermont Law School
    Class of 1998
    J.D.

    Vermont Law School
    J.D.
    Honorable Mention Award

    Vermont Law School
    J.D.
    Vermont Law Review

    Vermont Law School
    J.D.
    1998 Personal Note Editor

    Vermont Law School
    J.D.
    Vermont Law Review

    Vermont Law School
    J.D.
    Member

    Vermont Law School
    J.D.
    Vermont Law School Academic Excellence Award for highest achievement in Constitutional Law

    Vermont Law School
    J.D.
    1997 R. Marlin Smith Student Writing Competition sponsored by American Planning Association
    Other Education
    University of California at San Diego
    Class of 1992
    B.A.
    Urban Studies & Planning

    Personal Note Editor, Vermont Law Review

    Georgia Institute of Technology
    Class of 1995
    M.C.P.
    Master of City Planning

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    Member

    Vermont Law School
    Vermont Law School Academic Excellence Award for highest achievement in Constitutional Law

    Vermont Law School
    1997 R. Marlin Smith Student Writing Competition sponsored by American Planning Association

    Vermont Law School
    Honorable Mention Award

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    1998 Personal Note Editor

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    Member

    Vermont Law School
    Vermont Law School Academic Excellence Award for highest achievement in Constitutional Law

    Vermont Law School
    1997 R. Marlin Smith Student Writing Competition sponsored by American Planning Association

    Vermont Law School
    Honorable Mention Award

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    1998 Personal Note Editor

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    Member

    Vermont Law School
    Vermont Law School Academic Excellence Award for highest achievement in Constitutional Law

    Vermont Law School
    1997 R. Marlin Smith Student Writing Competition sponsored by American Planning Association

    Vermont Law School
    Honorable Mention Award

    Vermont Law School
    Vermont Law Review

    Vermont Law School
    1998 Personal Note Editor
  • Personal Details & History
    Age
    Born in 1970
    Santa Monica, California, October 13, 1970

Contact Mr. Gregory Rudolf Tan

Of Counsel at Greenberg Traurig, LLP
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The Tabor Center, 1144 15th Street, Suite 3300Denver, CO 80202U.S.A.

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Attorneys FAQs

  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Mr. Gregory Rudolf Tan is admitted to practice before the United States Court of Appeals for the Ninth Circuit, United States Court of Appeals for the Tenth Circuit, United States District Court for the District of Colorado and United States District Court for the Northern District of Georgia.
  • How many attorneys are in this law firm?
    Greenberg Traurig, LLP has 2750 attorneys at this location.
  • What law school did this attorney attend?
    Mr. Gregory Rudolf Tan attended Vermont Law School and Vermont Law School.
  • What year was this attorney's law firm established?
    Greenberg Traurig, LLP was established in 1967.