Environmental Protection Agency April 3, 2012 – Federal Register Recent Federal Regulation Documents
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Clean Water Act Section 303(d): Availability of List Decisions
This notice announces the availability of EPA's Responsiveness Summary Concerning EPA's November 30, 2011, Public Notice of Proposed Decisions to Add Waters and Pollutants to Louisiana's 2010 Section 303(d) List. On November 30, 2011, the U.S. Environmental Protection Agency (EPA) published a notice in the Federal Register at Volume 76, Number 230, pages 74057-74058 providing the public the opportunity to review its decision to partially approve and proposal to partially disapprove Louisiana's 2010 Section 303(d) List. Specifically, EPA approved Louisiana's listing of 410 waterbody pollutant combinations, and associated priority rankings. EPA proposed to disapprove Louisiana's decisions not to list three waterbodies. These three waterbodies were added by EPA because the applicable numeric water quality standards marine criterion for dissolved oxygen was not attained in these segments. Based on the Responsiveness Summary, EPA finds no new information or persuasive arguments as to why the three waters should not be added to the 2010 Louisiana Section 303(d) List as proposed. Therefore, EPA is taking Final Action on the addition of three waterbody pollutant combinations to the final Louisiana 2010 Section 303(d) List. The basis for these decisions is described in EPA's Responsiveness Summary and the Record of Decision.
Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Sulfur
This final rule is being issued as required by a consent decree governing the schedule for completion of this review of the air quality criteria and the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen and oxides of sulfur. Based on its review, the EPA is retaining the current nitrogen dioxide (NO2) and sulfur dioxide (SO2) secondary standards to address the direct effects on vegetation of exposure to gaseous oxides of nitrogen and sulfur and, for reasons described in detail in this final preamble, is not adding new standards at this time to address effects associated with the deposition of oxides of nitrogen and sulfur on sensitive aquatic and terrestrial ecosystems. In addition, in this rule the EPA describes a field pilot program being developed to enhance our understanding of the degree of protectiveness that would likely be afforded by a multi-pollutant standard to address deposition-related acidification of sensitive aquatic ecosystems.
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