Memphis Company Sentenced for Violations of the Clean Air Act

Memphis, TN – A Memphis company that specialized in repairing diesel engines was sentenced to pay a fine in the amount of $150,000 for violations of the Clean Air Act.  P.T. Services, Inc. entered a guilty plea to the violations in September. D. Michael Dunavant, United States Attorney for the Western District of Tennessee, announced the sentence today.

According to information presented in court at the plea hearing, between June 2023 and August 2024, P.T. Services, Inc. modified and deleted emissions control monitoring devices from diesel engines.   Under provisions of the Clean Air Act, it is a crime to falsify, tamper with and render inaccurate emissions control monitoring devices.  

The sentence was imposed by United States District Judge Mark S. Norris on November 25, 2025.  In addition to the $150,000 fine, as part of the plea agreement, the company was ordered to participate in a compliance program and be subject to unannounced inspections by the Environmental Protection Agency.

U.S. Attorney D. Michael Dunavant said, "The U.S. Attorney’s Office is a full-service federal prosecution office, and we have the ability and intention to charge any violations of federal law, no matter where or how they occur in the Western District of Tennessee. This prosecution demonstrates our commitment to upholding the rule of law, and to pursuing any cases that harm and impact our air quality and environment."

“This sentence should send a clear message that companies who break environmental laws will be held accountable,” said Special Agent in Charge Joseph E. Carrico of the FBI Nashville Field Office. “Modifying and deleting emissions control monitoring devices from diesel engines can lead to poor air quality and health risks. The FBI and our partners will continue to work together to hold accountable individuals who disregard health and environmental laws designed to protect our communities.”

The case was investigated by agents with the Environmental Protection Agency (EPA) and the Federal Bureau of Investigation (FBI). 

The case was prosecuted by Assistant United States Attorney Carroll L. André III.

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