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Assistant Attorney General for the Environment and Natural Resources Division
Ron Tenpas

Ronald J. Tenpas was named by President George W. Bush as the Assistant Attorney General in charge of the Environment and Natural Resources Division at the U.S. Department of Justice on May 30, 2007, and subsequently confirmed to the position by the Senate.

Mr. Tenpas has worked in the Department for a number of years, serving as Associate Deputy Attorney General; as the United States Attorney for the Southern District of Illinois; as an Assistant United States Attorney and Branch Chief in the District of Maryland; and as an Assistant United States Attorney in the Middle District of Florida in Tampa, Florida, starting in 1997.

As Assistant United States Attorney, Mr. Tenpas personally tried and investigated a variety of matters, including offenses involving narcotics transportation and distribution, violent crime, health care fraud, identity theft, government fraud, other white collar offenses, and public corruption. While in the Deputy Attorney General’s Office, he had oversight responsibilities for litigation matters and litigation policy, including matters related to the Environment and Natural Resources Division as well as several other Department components.

Before joining the Department, he served as a law clerk to the Honorable Louis H. Pollak, U.S. District Court Judge for the Eastern District of Pennsylvania; as a law clerk to Chief Justice William H. Rehnquist, United States Supreme Court; and as a law clerk to the Honorable Howard Holtzmann, judge on the Iran-U.S. Claims Tribunal located in The Hague, The Netherlands. He also was an associate with the Carlton, Fields law firm in Tampa, Florida.

Mr. Tenpas received an International Relations degree from the James Madison College of Michigan State University, graduating with high honors in 1985. He was awarded a Rhodes Scholarship to attend Oxford University where he studied Philosophy, Politics and Economics, receiving a degree in 1987. After Oxford he was awarded a Hardy Cross Dillard Scholarship to attend the University of Virginia Law School from which he graduated in 1990. He served as Editor-in-Chief of the Virginia Law Review and was elected to the Order of the Coif.


Environment and Natural Resources Division

The Environment and Natural Resources Division, which is organized into ten sections, has primary responsibility for litigation on behalf of the United States regarding:

With offices across the United States, the Division is the nation's environmental lawyer, and the largest environmental law firm in the country.



Latest News
June 23, 2008
The pharmaceutical company Pfizer Inc. has agreed to pay a $975,000 civil penalty to resolve alleged violations of the Clean Air Act at its former manufacturing plant in Groton, Conn. (Read more)
June 20, 2008
Oscar Cueva, of McAllen, Texas, was sentenced today in U.S. District Court in Denver to 16 months in prison for his participation in the sale and smuggling of sea turtle and other exotic skins and skin products into the United States from Mexico, the Justice Department announced today. (Read more)
June 18, 2008
Gerald Lakota, a former employee of Fujicolor Processing, pleaded guilty today to willfully concealing and covering up a material fact in reports required to be filed under the Clean Water Act, the Justice Department announced. (Read more)
June 16, 2008
Magellan Midstream Partners agreed to pay a $5.3 million civil penalty for alleged violations of the Clean Water Act, the Justice Department and U.S. Environmental Protection Agency (EPA) announced today. The alleged violations include illegally discharging gasoline and fuel oil from pipelines in Illinois, Kansas, Iowa, Minnesota and Arkansas into nearby waterways over the past 10 years. (Read more)
Reederei Karl Schlueter, an operator for GmbH & Co. KG (RKS), a ship management company, and Chief Engineer Nikola Ilijic, an officer on a ship operated by RKS, pleaded guilty today to a charge that they falsified the Oil Record Book pertaining to the commercial vessel M/V MSC Uruguay, announced the Justice Department, U.S. Environmental Protection Agency (EPA), and U.S. Attorney for the Eastern District of Pennsylvania Pat Meehan. Schlueter is of Rendsburg, Germany, and Ilijic is of Rijeka, Croatia. (Read more)
June 11, 2008
Four of the nation’s largest home builders have agreed to pay civil penalties totaling $4.3 million to resolve alleged violations of the Clean Water Act, the Justice Department and U.S. Environmental Protection Agency (EPA) announced today. The companies also have agreed to implement company-wide compliance programs that go beyond current regulatory requirements and put controls in place that will keep 1.2 billion pounds of sediment from polluting our nation’s waterways each year. (Read more)
June 10, 2008
Valero Refining-Texas, L.P. has agreed to resolve alleged violations of the Clean Water Act stemming from a spill of 3,400 barrels of oil into the Corpus Christi Ship Channel on June 1, 2006, the Justice Department and the Environmental Protection Agency (EPA) announced today. (Read more)
June 6, 2008
Colorado Structures, Inc., (CSI) a construction management firm that specializes in building big-box commercial stores in the western United States, has agreed to pay a $300,000 penalty and implement a company-wide storm water compliance program to resolve alleged Clean Water Act violations, the Justice Department and Environmental Protection Agency (EPA) announced today. (Read more)
June 5, 2008
Spencer Environmental Incorporated (SEI) and its president, Donald M. Spencer, were sentenced today by U.S. District Judge Haggerty for the District of Oregon, the Justice Department announced. In a related matter, SEI’s former engineer, Durbin Hartel, was indicted yesterday by a federal grand jury for obstruction of justice and lying to investigators. (Read more)


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