Water used for final (post-disinfection) rinsing
The water used for final (post-disinfection) rinsing shall conform to ISO/FDIS 15883-1:2005, 6.4.2.4. In addition, it shall be tested for the presence of legionellae and mycobacteria at the point of discharge into the WD chamber in accordance with Annex B).
Results shall be reported as the number of colony forming units per 100 ml of water for legionellae and mycobacteria.
It is recommended that the test should be carried out prior to installation and at least annually thereafter. The tests specified in ISO/FDIS 15883-1:2005, 6.4.2.4 should also be carried out prior to initial installation and at regular intervals thereafter. This may be approximately weekly until it has been established that the water supply is consistently within specification and at more extended intervals thereafter.