As per the ZDHC Wastewater and Sludge Guidelines V2, five boron based flame retardants (boric acid, diboron trioxide, disodium octaborate, disodium tetraborate anhydrous, and tetraboron disodium heptaoxide, hydrate) are detected as total elemental boron via ICP (Inductively Coupled Plasma) spectroscopy method. 

Therefore, if the total elemental boron content is higher than 500 μg/L, then all five boron flame retardants will be marked as non-conformant in the test report and the ClearStream Report. The reporting values should be the same as for all five boron based flame retardants that are determined as total elemental boron and not via any other test method including the molecular weight calculation of these five boron based flame retardants.