Epa proposes so2 naaqs remain same, looks for alternatives to. Epa has not provided implementation guidance as it did concerning. May 20, 2014 applicability of appendix w modeling guidance for the 1hour so2 naaqs, august 23, 2010 additional clarification regarding application of appendix w modeling guidance for the 1hour no2 naaqs, march1, 2011 draft guidance for pm2. Federal register primary national ambient air quality. Dans presentation consisted of a summary of the naaqs, an update on naaqs implementation, naaqs modeling demonstration approach, and a summary of ambient so2 monitoring. Applying or implementing sulfur dioxide standards epa. Guidance for 1hour sulfur dioxide so2 nonattainment.
Schiller station portsmouth, new hampshire sierra club. Concerning the implementation of the 1hour so2 naaqs for the prevention of significant deterioration. Guidance for 1hour so2 nonattainment area sip submissions. Naaqs so 2 nonattainment area guidance june 26, 2014. Interim 1hour sulfur dioxide so2 naaqs implementation. Apr 20, 2012 all4s dan dix presented at the 23rd virginia environmental symposium about 1hour so2 implementation modeling. Epa science advisors support current so2 naaqs verdant law. The existing so 2 monitoring network characterizes localized so2 source impacts in a limited set of areas. Air dispersion modeling analysis for verifying compliance of. February 2016 draft so2 naaqs designations modeling technical. Finally guidance and updated programs catch up with new 1.
Epa issues policy memoranda and technical guidance for use by federal, regional, state, tribal, and local agencies to implement the naaqs for all criteria pollutants. For the most part, the attached guidance focuses on how existing policy and guidance is relevant to and should be used for implementing the new ihour s02 naaqs. National ambient air quality standards naaqs national ambient air quality standards naaqs table has moved. Floridas proposed sip amendment consists of specific conditions from two air construction permits for two facilities, mosaic new wales and mosaic bartow, as they pertain to emissions of so2. Celebrating 40 years of taking care of missouris natural resources. June 22, 2010, provided further guidance concerning implementation of the standard and how to identify nonattainment areas and boundaries for the so 2 naaqs. Florida dep nassau so2 sip florida florida department of. Implementation guidance for the national ambient air. The public comment period, which was initially set to close on november 2, 2011, was extended by a month until december 2, 2011. Pm 416 initial area designations for the 2012 revised primary.
From the listing below, find the file you would like. Epa guidance on significant impact levels for ozone and fine particles april 17, 2018. Epa no longer updates this information, but it may be useful for historical purposes. Naaqs takes the form of a threeyear average of the 99thpercentile of the annual distribution of daily maximum onehour concentrations, which cannot exceed 75 ppb. Some software guis have the functionality to output maximum annual. How to select the appropriate output for so2 sep 12, 2017 the u. Dnr comments on epa implementation rules and guidance. S02 naaqs or 1hour s02 standard of75 ppb, which is attained when the 3year average of the annual 99thpercentile of 1hour daily maximum concentrations does not exceed 75 ppb at each monitor within an area.
Epa could change its general guidance in the future or require a different. For no2, these regulation changes were published in 40 cfr part 50. Current pm naaqs implementation activities center on the naaqs promulgated in 1997 and the upcoming 2006 naaqs promulgation. Epa ttn naaqs pm10 naaqs implementation guidance documents. Sulfur dioxide so2 primary air quality standards the clean air act requires epa to set national ambient air quality standards naaqs for sulfur dioxide and five other pollutants considered harmful to public health and the environment the other pollutants are ozone, particulate matter, nitrogen dioxide, carbon monoxide, and lead. As a part of the continuing implementation of the air quality management system, on october 3, 2016 ministers announced new canadian ambient air quality standards caaqs for sulphur dioxide that will drive the improvement of air quality across the country. Aermod, as available from the support center for regulatory atmospheric modeling scram website, was used in. Emissions inventory guidance for implementation of ozone and particulate matter national ambient air quality standards naaqs and regional haze regulations, signed may, 1999.
Fine particulate matter national ambient air quality standards rule. Pm 10 naaqs implementation guidance documents note. Evaluation of compliance with the 1hour naaqs for so2 may 12, 2016 page 6 3. So2 modeling guidance and assistance ttn support center. Brandoncranewagner md evaluation of compliance with the 1. Users instructions for hrlynaaqs with new 1hour naaqs for.
Tceq apdg 6232v4, revised 1119 air quality modeling guidelines page 1 of 116. Epa is continuing to move forward with the sulfur dioxide so2 national ambient air quality standards naaqs implementation process. National ambient air quality standards naaqs for so 2. Jun 02, 2010 so2 modeling guidance and assistance sulfur dioxide so 2 designations and implementation modeling guidance and assistance the information and links provided below are intended to help inform and assist regional, state, local, and tribal modelers with respect to designation and implementation modeling for the 1hour sulfur dioxide so 2. The epa solicited comment on that guidance and, in the notice of final rulemaking 75 fr 35520. The documents also provide guidance on how to incorporate the new 1hour no2 and so2 naaqs into a psd air quality modeling analysis. Guidance for implementation of the 1hour so2 naaqs under psd.
June 2010 epa promulgated the 1hr so 2 primary naaqs as a replacement for the existing annual and 24 hour primary naaqs 75 ppb as the 3 year average of the 99th percentile of the annual distributions of the daily maximum 1hour concentrations. Evaluation of compliance with the 1hour naaqs for so2 march 23, 2016 page 2 1. Guideline on data handling conventions for the pm naaqs cover memo, signed may 11, 1999. It is very important for all modelers both within and outside of the u. Updates to appendices q and r based on epa finalizing guidance on modeled emission rates for precursors. The 1997 naaqs for pm introduced new standards for pm less than 2. So naaqs designations modeling technical assistance document. Naaqs implementation coalition virtual facilities naaqs study. The designations for round 1 covered areas that violated the 1hour so2 naaqs based on certified ambient air quality monitoring data for the years 2009 to 2011. In the most recent legal action, texas, north dakota, louisiana, the utility regulatory group, and others are challenging the science behind the proposed 75 parts per billion ppb standard. Sulfur dioxide so2 national ambient air quality standard. National ambient air quality standardssulfur dioxide page 3 of 8 date. Effective august 1, 2016, the wisconsin department of natural resources wdnr revised the state implementation plan sip to adopt the federal national ambient air quality standards naaqs for sulfur dioxide so2 and nitrogen dioxide no2 for. The united states environmental protection agency epa issued annual and 24hour primary healthbased so 2 standards as well as threehour and annual secondary so 2 standards in 1971.
Homer city generation lp pa evaluation of compliance with. Table of historical so2 naaqs sulfur dioxide naaqs us epa. Epa guidance on the development of modeled emission rates for precursors merps as a tier i demonstration tool for ozone and pm 2. Guidance for implementation of the 1hour so2 naaqs. National ambient air quality standards naaqs for 1hour so 2, 1hour no 2, and 24hour pm 2. National ambient air quality standards naaqs for 1hour so2, 1hour no2. Before the release of the draft implementation guidance, it seemed that more was happening with the 1hour so2 naaqs in the courts than anywhere else.
Attainment of the so2 naaqs occurs when the most recent threeyear. Guidance for implementing the 2010 so2 standard so2 naaqs timelines. The program uses the optional formatted post f ile output from aermod iscprime to fully implement epa modeling guidance, and the form of the new standards. Epa revised primary naaqs for sulfur dioxide so 2 standard on june 3, 2010 to 75 ppb1hour 75 fr 35520 epa designated 29 areas as nonattainment on july 25, 20 round 1 guidance for 1hr so 2 naaqs naa sip submissions was issued on april 23, 2014 attainment plans for the 29 areas were due april 4, 2015. Epa no longer updates this information, but it may be useful as a reference or resource. The epa designated one nonattainment area in wisconsin in round 1.
Federal register air quality designations for the 2010. Epa revised the primary s02 naaqs to provide the requisite protection of public health. The drr was developed to address the need for additional air quality data to be used for implementing the 2010 1. Sulfur dioxide so2 national ambient air quality standard naaqs. Final regulatory impact analysis ria for the so2 national. The tceq implements the nsr program through statutory authority for air. The most significant uncertainties currently exist in the implementation of naaqs for particulate matter pm. Aqs software notes no2 and so2 naaqs air quality system. Brandoncranewagner md evaluation of compliance with the. Hrlynaaqs provides the annual 98 th no2 or 99 th so2 percentile of. Calpuff modeling analysis of the sulfur dioxide and pm2. Naaqs, and will inform implementation for areas still violating 1997 andor 2006 pm.
Allowances may be bought, sold, or transferred at any time by utilities, other affected. The software changes will implement phase 1 of the 2010 no2 and so2 naaqs revisions to aqs. Primary standards set limits to protect public health, including the health of sensitive populations such as asthmatics, children, and the elderly. National ambient air quality standardssulfur dioxide. The epa approved the request for amendment on february 20, 2020, with an effective approval date of march 23, 2020. This presentation also includes implementation upda slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Revision to floridas state implementation plan sip. Jun 20, 2018 find statebystate reopening guidance and orders on our covid19 state reopening tracker click here. The document is intended to provide guidance and recommendations to state, local and tribal governments for the development of state implementation plans sips and tribal implementation plans tips under the 2010 1hour primary national ambient air quality standard for sulfur dioxide so 2 naaqs. Environmental protection agency office of air quality planning and standards health and environmental impact division air benefitcost group research triangle park, north carolina.
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