Is A Compressed Air PQ Really Required?

Is compressed air PQ a requirement under GMP. We are producing solid dosage products.
If It is required, how long does the PQ last?
Thanks for any input on this topic.

yep its required

three days continuous monitoring of pressure, Oil content, NVPC monitoring, Micrbial monitoring, Dew point at pressure and at atmosperic.

I have a question: How long will sampling and testing take place for routine monitoring?