(d) The concentration of highly toxic mixtures bridging principle can be applied because the tested mixture is classified in Category 1 and the concentration of ingredient 1 (i.e., a Category 1 ingredient) has increased in the untested mixture.
(d) The concentration of highly toxic mixtures bridging principle can be applied because the tested mixture is classified in Category 1 and the concentration of ingredient 1 (i.e., a Category 1 ingredient) has increased in the untested mixture.