entryway systems for trucks

Hi Robert, When I worked on a firestation with heavy (and dirty) fire trucks entering a garage space, we made sure that the all of the entrances from the garage space into the interior space had walk off mats. We also documented the processes in places to clean the vehicles and deal with their exhaust through proper ventilation (http://www.acleansystem.com/pdfs/plymovent_remove_diesel_exhaust.pdf). I don't know of a particular CIR and don't know if this path would work for you, however, I would try to make a case for at least parts of your manufacturing facility being almost more of outdoor spaces. Do you have staff working in this space? The intent of the credit is to protect the indoor air quality of the space of your staff. Perhaps an effort could be made beyond walk off mats to ensure that the intent of keeping good air quality for staff. Good luck!