We are a mobile facility with a van that does not have on-board processing.
When the van returns to our main office, we batch process the films. Do we have to perform a semiannual test for darkroom fog in this film-changing room?
Yes. Since you use a room to load and unload cassettes with film, you must test this room for darkroom fog as well as the darkroom for your processor. Both rooms have the potential to fog films and degrade image quality.