Proposed revision to NSF/ANSI 55 – Ultraviolet Microbiological Water Treatment Systems.
The proposed revision will add clarifying language to Sections 7.2.2.5.1 and 7.3.1.5.2, indicating that the maximum allowable UVT of 70% only applies to Class A systems. The mean absorption values were also corrected to be consistent with the current edition of Standard Methods for the Examination of Water and Wastewater, Method 5910: UV Absorbing Organic Constituents. |
