With the update to Regulation 854 last year, many underground mine sites have been exploring options for meeting the new worker diesel particulate matter (DPM) exposure limits. While there are many options for reducing DPM exposure (Ventilation/Dilution, BEV equipment), diesel particulate filters (DPF) can reduce DPM emissions by 98 per cent. This presentation seeks to lay out a practical roadmap to show how a mine site can evaluate their fleet to see which machines are the biggest contributor to underground DPM levels, and the effects/results of adding filters to equipment.