The methane trapped in the soil poses risks to the environment and public safety. One way to remove methane from the soil is by using a system that pulls fresh air into the soil to push the methane out, which is also called soil aeration. In this study, we used numerical models and field-scale experiments to test how different soil conditions and system designs affect the performance of soil aeration. We found that using more air inlets helps remove methane more effectively, especially in finer soils. Our results can help utility companies and regulators design effective systems to safely clean up methane in the ground.