Gregory R. Tan’s practice focuses on litigation and counseling for clients in the railroad, natural gas, petroleum, renewable energy, mining, development, home building and telecommunications industries on complex environmental enforcement and regulatory matters. Greg represents clients in environmental enforcement actions brought by federal, state and tribal agencies and helps clients navigate regulatory requirements, manage environmental risk, and obtain permits and approvals necessary to move forward with development projects, real estate transactions and day-to-day business operations.
Greg has 20 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.
Greg also counsels clients on regulatory compliance arising under environmental statutes, public utilities law, and local zoning and development codes. Greg advises retail developers and residential homebuilders on state and federal construction storm water discharge requirements, regulatory requirements applicable to installing and operating solar PV systems, and land use and zoning requirements. Greg has handled a system-wide multi-media environmental audit for a national wireless telecommunications company under an agreement with the EPA that resulted in a waiver of the civil penalty. Greg also advises developers, investors and lenders on the environmental aspects of real estate transactions, including environmental due diligence and negotiating environmental terms in deal documents.
Greg represents clients in federal and state rulemaking proceedings and in Colorado Public Utilities Commission (PUC) dockets. Greg has represented Colorado ski resorts before the PUC in gas and electric rate cases and in a docket involving proposed reforms to the utility’s environmental tariffs. Greg has represented a natural gas pipeline company in a rulemaking proceeding before the Colorado Oil and Gas Conservation Commission (COGCC) relating to Pipeline Safety Act and Natural Gas Act preemption matters. Greg also represents clients before local government bodies throughout the Denver metro area in connection with obtaining land use permits and approvals for development projects.
Prior to joining the firm, Greg led numerous 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. Prior to his work at the EPA, Greg practiced land use law in Atlanta.
- Land development
- Administrative law
- Renewable energy
- Utilities law
- Environmental aspects of business transactions
- Global energy & infrastructure