Historical
NSF/ANSI 53-2006 Addendum 1
[Historical Standard] Addendum to NSF/ANSI 53-2006: Drinking water treatment units - Health effects
The revision to NSF/ANSI 53 - 2006, Addendum 1.0 consists of updates to tables 7, 8, 11, 12, and 13 clarifying the requirements for influent challenge requirements for chemical reduction testing.
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NSF International [nsf]