A large West Australian Gold Mine set out to understand the direct relationship between adding more production equipment and the consequential effect this would have on baseline diesel particulate matter (DPM) levels. Key site personnel including the ventilation manager, production manager and mine manager formed a task group and agreed to develop a project scope, execution plan, results evaluation methodology, and next steps recommendations. A location was chosen based on close proximity (40m approximately) to diesel powered equipment near the working face. This environment was considered high risk due to the activity levels and the predominance of diesel emitting technologies. Ventilation airflow was also regarded as being considerably less in this area of the operation when compared to the average ventilation velocity in the mining operation.