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Classifying Drinking Water Contaminants for Regulatory Consideration
proach is ultimately adopted and used to help create future CCLs.
Finally, EPA should realize that the committee is recommending a prototype classification scheme to be used in conjunction with expert judgment for the future selection of PCCL contaminants for inclusion on a CCL. Thus, transparency is less crucial (though no less desired) at this juncture than when selecting contaminants from the CCL for regulatory activities as discussed in the committee’s first report (NRC, 1999a).