that paragraph. (B) Effect on Administrator Nothing in this subsection affects the authority of the Administrator to approve State programs that assume primary enforcement responsibility for only certain types of underground injection control wells. . (c) Disclosure Section 1421(b) of the Safe Drinking Water Act ( 42 U.S.C. 300h(b) ) is amended by adding at the end the following: (4) Disclosures of chemical constituents (A) In general A person conducting hydraulic fracturing operations shall disclose to the State (or to the Administrator, in any case in which the Administrator has primary enforcement responsibility in a State), by not later than such deadlines as shall be established by the State (or the Administrator)— (i) before the commencement of any hydraulic fracturing operations at any lease area or a portion of a lease area, a list of chemicals and proppants intended for use in any underground injection during the operations (including identification of the chemical constituents of mixtures, Chemical Abstracts Service numbers for each chemical and constituent, material safety data sheets if available, and the anticipated amount of each chemical to be used)