PQ for LAF in microbiology laboratory

Dear sir,
Good morning
I Require suggestion,
When PQ is performed for LAF, which grade consider. Surrounding area grade C.
LAF use for preparations of settle plate.
Please give suggestion

The performance qualification is must be conduct after DQ, IQ, OQ stages successfully completed in LAF and they LAF should be considered A grade.

Even though it is a grade-A air supply at rest condition it will be considered as grade- A. but in operation condition it will be considered as surrounded grade. In your case it is Grade C.