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Standards History
AWWA B302   2023   Ammonium Sulfate 80 $
AWWA B302   2016   Ammonium Sulfate 80 $
AWWA B302   2010   Ammonium Sulfate 50 $
AWWA B302   2005   Ammonium Sulfate 50 $
AWWA B302   2000   Ammonium Sulfate 30 $
AWWA B302   1995   Ammonium Sulfate 30 $