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In Russia, terms пїЅmarker substanceпїЅ or пїЅmarker parameterпїЅ have been used in regulatory acts on Best Available Techniques (BATs). For BAT-related purposes it is needed to select most significant, marker (or indicator) parameters characterizing applied technologies and useful for setting BAT-associated emission limit values. When reliable environmental performance data are scarce and self-monitoring practices are not fully developed, marker parameters should be chosen by means of expert analysis. Russian inf...