Nick, there are constant comments regarding the vent on an exterior wall being too short (ending under the soffit) and/or too close to openable windows, or both, etc. I believe there are currently two discussions on the MB going. A good detailed graphic addressing this would be great! Thanks.
OK. We’ll make one.
Here is an SOP and checklist for inspecting radon mitigation systems: http://www.nachi.org/comsop.htm#18