Are there any requirements regarding the microbiological monitoring of sewage drains in production rooms?
Should there be a microbiological monitoring program in place specifically for the drains?
First of all, drains in production rooms are not permitted in class A/B (EU GMP Guide, Annex 1 No. 50) which means the question should refer exclusively to production rooms starting with class C. Further information on the construction of drains can be found in EU GMP Guide Part I, 3.11.
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