HVAC validation

Hello everyone,
I hope in this pandemic situation, all are fine.

I am working in tablet and capsule formation plant.

I have Question regarding to HVAC validation.
During HVAC validation, where should we do viable monitoring by Settle plates?

Is possible to do viable monitoring before test completion of Particulate counts?

Actually company has done air velocity and filter integrity test but particulate count test is pending.
In between this, my Environment monitoring by Settle plates schedule is due…
What should I do to planned environment monitoring ? Can i go for environment monitoring before particulate count??

Kindly Suggest me…

Thanks and regards,
Dipika.