The seals of the compressor as well as other items in the line may be considered sources of emissions. These could include control valves, PSVs, flanges, etc. In the immediate vicinty about these sources would be considered Class 1 Div 1. This distance is dependent on the potential volume...
I am wondering what the general rule is for manufacturers of wheel rims with respect to how eccentric a new rim can be. If a rim is marginally eccentric is the effect magnified at the surface of the tire. How much of an effect will there be on percieved balancing of the tire/rim combination?