Black Tank Roof Vent and Bathroom Roof Vent Too Close?
In the TC (see sig) there can be a whiff of tank smell that apparently comes from the open roof vent by way of the tank vent nearby, but not positive that is the source. It is not coming from the to...
If there is a sink close to the toilet poke your head into the cabinet and take a whiff. It's possible the smell is coming from there and not off the roof. If that's where the smell comes from you can unscrew and replace the air admittance valve.