• To avoid recontamination of bivalve molluscs undergoing purification, unpurified bivalve molluscs should not be placed in the same tank as bivalve molluscs which are already undergoing purification.
• On removal from the purification system, bivalve molluscs should be washed with running potable water or clean sea water, and handled in the same manner as living bivalve molluscs taken directly from a non-polluted area. Dead, with broken shells or otherwise unwholesome bivalve molluscs should be removed.
• Before removing the bivalve molluscs form the tanks drain the water from the system to avoid resuspension and reingestion. The tanks should be cleaned after each use and disinfected at suitable intervals.