The specification of compressed air using for d Grade GMP

Dear All

anyone who know the specifications of compressed air using for d Grade GMP.
9we found in Iso 8573-1 (2010) some tests: 1/ Particle class 2/ Humidity classes 3/ Oil classes 4/ Contaminants classe , but I don’t know to choose which classes are suitable for D Grade of GMP Who

many thanks
Tran Van Dao- Pharamacist