CMS SOM App. H, Tag V240

5.5.4 Bicarbonate concentrate distribution systems (Ultraviolet Irradiation)

UV irradiation devices that are used to control bacteria proliferation in the pipes of

bicarbonate concentrate distribution systems should be fitted with a low-pressure mercury

lamp that emits light at a wavelength of 254 nm and provides a dose of radiant energy of 30

milliwatt- sec/cm2. The device should be sized for the maximum anticipated flow rate

according to the manufacturer’s instructions and be equipped with an on-line monitor of

radiant energy output that activates a visual alarm indicating that the lamp should be

replaced.

Alternatively, the lamp should be replaced on a predetermined schedule according to the

manufacturer’s instructions to maintain the recommended radiant energy output.

Disinfection of the bicarbonate concentrate distribution system should continue to be

performed routinely.

Interpretive Guidance § 494.40(a)

This requirement applies to UV irradiators used in the bicarbonate delivery system, rather than

to an UV irradiator used in the water treatment/distribution system. A facility may have an UV

irradiator in one system, and not in the other. The UV irradiator in the bicarbonate delivery

system may also be used to help breakdown the ozone used to disinfect the bicarbonate delivery

system.