This
regulatory value is a
quantitative limit on the
emission or
discharge of a potentially
toxic substance from a source (such as a
factory). The simplest form for regulatory purposes is a
uniform emission standard (UES) where the same limit is placed on all emissions of a particular
contaminant.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.