If the available data are deemed insufficient for deriving a standard or guidance value on the basis of either of sections 702.4 or 702.5 of this Part, a standard or guidance value may be based on correlation to a chemical for which a standard or guidance value has been established pursuant to those sections. Standards or guidance values based on chemical correlation may be established if similar toxic effects are anticipated because of similarity of functional groups or metabolic or toxicologic pathways.
N.Y. Comp. Codes R. & Regs. Tit. 6 § 702.7