An assessment of other biocides and pesticides and non-chemical techniques goes beyond the scope of the risk management evaluation and is not needed because additional measures are not considered . Alternatives and methods to reduce persistent organic pollutants when formed and released unintentionally from anthropogenic sources are dealt with under the Stockholm Convention BAT/BEP guidelines of the UNEP ( 2006 ) and BREFs ( BAT reference documents ) of the EU ( EC , 2006 ) .