EMP

Sponge or swab, D/E, Letheen or HiCap against the sanitiser, the ten step aseptic round, the cold chain to an accredited laboratory, and the R638 cleaning verification limit.

What an environmental monitoring programme is, who requires one, why R638 does not, the four zones, the 5 x 5 risk rating and the first hour after a Listeria positive.