What is the maximum concentration of DPM allowed under West Virginia law?

The maximum concentration of Diesel Particulate Matter (DPM) allowed under West Virginia law is set at 0.12 mg/m^3. This limit is established to protect workers in environments where diesel emissions are prevalent, particularly in industries such as mining and construction. Maintaining the concentration at or below this level helps to minimize health risks associated with exposure to DPM, which can include respiratory issues and other long-term health effects. The regulation is part of broader occupational health and safety standards designed to ensure safe working conditions for all employees. Other levels proposed in the options, being higher or lower than this threshold, do not align with the state regulations focused on ensuring a safe working environment.