Jeff Hebenstreit - UL 12/4/2013

Background Standard was revised: Evaluation of Sodium Hypochlorite for Chlorate SPAC = 200 ppb UL began evaluating samples for chlorate in 2013 Many manufacturers having difficulty meeting the SPAC at the current Maximum Use Level (MUL) MUL based on 10 mg/L FAC

Some Chlorate Factors Concentration of bleach Storage temperature Storage time Other factors

Chlorate SPAC Currently SPAC = 200 ppb Ballot passed Joint Committee to revise Would have changed SPAC to 300 ppb NSF Council of Public Health Consultants Failed to pass Rounding rules have since passed ballot

Data Summary FAC Dose10 mg/L2 mg/L Factory Locations35 Mean (ug/L) Max (ug/L) Min (ug/L)9218 # samples </=200 ppb SPAC228 # samples </=300 ppb SPAC735

Revision to MUL NSF 60 allows for decreased MUL Floor of 2 mg/L FAC Is this a usable product certification?

Considerations Review the 2 mg/L FAC Dose Is this adequate for end users Determine the need to re-ballot the SPAC Changes to rounding rules Determine the need for a longer implementation period Nature of changes may require increased time