; and (II) the attainment and maintenance of national ambient air quality standards; (ii) the procedures and timelines of the Administrator for the disposition of petitions submitted under section 179B(b); (iii) the total number of petitions received by the Administrator under section 179B and, with respect to each petition— (I) the date on which the petition was initially submitted to the Administrator; and (II) the date of final disposition of the petition by the Administrator; and (iv) whether the Administrator recommends any statutory changes to facilitate— (I) the more efficient review and disposition of petitions submitted under section 179B