New York Codes, Rules and Regulations
Title 6 - DEPARTMENT OF ENVIRONMENTAL CONSERVATION
Chapter X - DIVISION OF WATER RESOURCES
Subchapter A - GENERAL
Article 2 - CLASSIFICATIONS AND STANDARDS OF QUALITY AND PURITY
Part 702 - Derivation and use of Standards and Guidance Values
Section 702.7 - Procedure for deriving standards and guidance values based on chemical correlation

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.