Any pharmacy engaged in compounding shall have a specifically designated and adequate area or space for the orderly compounding of prescriptions. The area used for the compounding of drugs shall be maintained in a good state of repair. The compounding area shall have cleanable surfaces to include walls, ceilings, and floors. Adequate lighting and ventilation shall be provided in all compounding areas. Potable water shall be supplied under continuous positive pressure in a plumbing system free of defects that could contribute contamination to any compounded drug product. Areas used for compounding shall be maintained in a clean and sanitary condition.