Public Water System Supervision Program Revision for the State of Oklahoma
Notice is hereby given that the State of Oklahoma is revising its approved Public Water System Supervision Program. Oklahoma has adopted three EPA drinking water rules, namely the: (1) Long Term 2 Enhanced Surface Water Treatment Rule (LT2), (2) the Stage 2 Disinfectants and Disinfection Byproducts Rule (DBP2), and (3) the Ground Water Rule (GWR). EPA has determined that the proposed LT2, DBP2, and the GWR submitted by Oklahoma are no less stringent than the corresponding federal regulations. Therefore, EPA intends to approve this program revision.
Prevention of Significant Deterioration for Particulate Matter Less Than 2.5 Micrometers-Significant Impact Levels and Significant Monitoring Concentration: Removal of Vacated Elements
On January 22, 2013, the United States Court of Appeals for the District of Columbia Circuit (the Court) granted a request from the EPA to vacate and remand to the EPA portions of two Prevention of Significant Deterioration (PSD) regulations, promulgated in 2010 under the authority of the Clean Air Act (CAA), regarding the Significant Impact Levels (SILs) for particulate matter less than 2.5 micrometers (PM2.5). The Court further vacated the portions of the PSD regulations establishing a PM2.5 Significant Monitoring Concentration (SMC). The EPA is amending its regulations to remove the vacated PM2.5 SILs and SMC provisions from the PSD regulations in the Code of Federal Regulations (CFR). This action is exempt from notice-and-comment rulemaking because it is ministerial in nature. The EPA will initiate a separate rulemaking in the future regarding the PM2.5 SILs that will address the Court's remand.
Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Approval of the Redesignation Requests of the West Virginia Portion of the Steubenville-Weirton, OH-WV Nonattainment Area for the 1997 and 2006 Fine Particulate Matter Standards
EPA is proposing to approve the State of West Virginia's requests to redesignate to attainment the West Virginia portion of the Steubenville-Weirton, OH-WV nonattainment area (hereafter ``the Steubenville-Weirton Area'' or ``the Area'') for both the 1997 annual and the 2006 24-hour fine particulate matter (PM2.5) National Ambient Air Quality Standards (NAAQS or standards). EPA is also proposing to approve as a revision to the West Virginia State Implementation Plan (SIP), the associated maintenance plans to show maintenance of the 1997 annual and the 2006 24-hour PM2.5 NAAQS through 2025 for the West Virginia portion of the Area. West Virginia's maintenance plans include insignificance findings for the mobile source contribution of PM2.5 and nitrogen oxides (NOX) emissions to the West Virginia portion of the Area for both the 1997 annual and 2006 24-hour PM2.5 standards. EPA agrees with these insignificance findings, and is proposing approval of such findings for transportation conformity purposes. In addition, EPA is proposing to approve the 2008 emissions inventory for the West Virginia portion of the Area for the 2006 24-hour PM2.5 NAAQS. In this rulemaking action, EPA also addresses the effects of two decisions of the United States Court of Appeals for the District of Columbia (D.C. Circuit or Court): The Court's August 21, 2012 decision to vacate and remand to EPA the Cross-State Air Pollution Control Rule (CSAPR); and the Court's January 4, 2013 decision to remand to EPA two final rules implementing the 1997 annual PM2.5 standard. EPA has taken separate rulemaking action to approve the redesignation of the Ohio portion of the Steubenville-Weirton Area for the 1997 annual and 2006 24-hour PM2.5 NAAQS. These actions are being taken under the Clean Air Act. (CAA).
Chlorsulfuron; Community Right-to-Know Toxic Chemical Release Reporting
EPA is denying a petition to remove chlorsulfuron from the list of chemicals subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA) of 1986 and section 6607 of the Pollution Prevention Act (PPA) of 1990. EPA has reviewed the available data on this chemical and has determined that chlorsulfuron does not meet the deletion criterion of EPCRA section 313(d)(3). Specifically, EPA is denying this petition because EPA's review of the petition and available information resulted in the conclusion that chlorsulfuron meets the listing criterion of EPCRA section 313(d)(2)(C) due to its toxicity to aquatic plants.