Apex Diesel Performance and EPA Region 3 reach settlement at $34,109.80 - On October 7, 2025, an Expedited Settlement Agreement was reached between EPA Region 3 and Apex Diesel Performance (Apex) in Atlantic, PA due to violations of the Title II of CAA. Apex failed to meet mobile source requirements under Section 203(a) of the CAA, for the tampering of 29 vehicles, with the effect of defeating emission controls or changing emissions. A settlement was met with a $34,109.80 penalty under the Expedited Settlement Agreement penalty policy and Apex certified that it has reviewed the EPA Tampering Policy - The EPA Enforcement Policy on Vehicle and Engine Tampering and Aftermarket Defeat Devices under the Clean Air Act .