FEDERAL REFERENCE METHOD.

SEC. 6012. FEDERAL REFERENCE METHOD.(a) In General.—Section 6102(e) of the Transportation Equity Act for the 21st Century (42 U.S.C. 7407 note; 112 Stat. 464–465) is amended to read as follows:“(e) Field Study.—Not later than 2 years after the date of enactment of the SAFETEA–LU, the Administrator shall—“(1) conduct a field study of the ability of the PM2.5 Federal Reference Method to differentiate those particles that are larger than 2.5 micrometers in diameter;“(2) develop a Federal reference method to measure directly particles that are larger than 2.5 micrometers in diameter without reliance on subtracting from coarse particle measurements those particles that are equal to or smaller than 2.5 micrometers in diameter;“(3) develop a method of measuring the composition of coarse particles; and“(4) submit a report on the study and responsibilities of the Administrator under paragraphs (1) through (3) to—“(A) the Committee on Energy and Commerce of the House of Representatives; and“(B) the Committee on Environment and Public Works of the Senate.”.