BOARD: BOARD: Allen Amsler Chairman R Kenyon Wells MarkS. Lutt Vice Chairman
Catherine B. Templeton, Director Promoting and prof!!cting the health of thepublicandthe environment May 01,2012

Ms. Gwendolyn Keyes Fleming Regional Administrator United States Environmental Protection Agency, Region 4 Sam Nunn Federal Center 61 Forsyth Street, SW Atlanta, Georgia 30303-8960 L. Clarence Batts,

### Jr. Ann B. Kirol, DDS John 0. Hutto, Sr., MD



### Re: Revision to South CarolinaAirQualityImplementation Plan- 

### 2010 End ofYear Revisions

DearMs. Fleming: The South CarolinaDepartment ofHealth and Environmental Control (Department) requests that the U.S. Environmental Protection Agency (EPA) grant final approval to this revision ofthe South Carolina Air Quality Implementation Plan (SIP). The EPA promulgates amendments to federal regulations throughout each calendaryear. In orderto maintain consistency with the appropriate federal revisions, the Department annually incorporates relevant federal rules from the previous year. One ofthe amendments based on 2010 federal rules that the Department is incorporating into state Prevention ofSignificant Deterioration (PSD) regulations, an incorporation ofmaximum allowable increases in ambientparticulate matter 2.5 micrometers in diameter and smaller (PM2.s) pollutant concentrations (known as "increments"), promulgated by the EPA on October 20, 2010 (75 FR 64864), is included in this SIP revision request. The Department is also reformatting its Ambient Air Quality Standards table and deleting an annual standard for particulate matter 10 micrometers in diameter and smaller (PM 10) that the EPA revoked on October 17, 2006 (71 FR 61144), in order to make our table and standards more consistent with the EPA's National Ambient AirQuality Standards table. These revisions are also part ofthis submittal. The enclosed SIP revision is the Department's aforementioned amendments to S.C. Regulation 61-62.5, Standards 2 and 7. (The remaining changes in this state action are to regulations that are not part ofthe SIP, such as S.C. Regulation 61-62.63, NationalEmissions Standards forHazardousAirPollutants.) The Department published a public notice seeking comment on the aforementioned revision to the SIP in the South CarolinaState Register on January 27, 2012. The Department held a staff-led informational forum (SIF) on February 27,2012. A representative from the Horry Environmental Action Team (HEAT) attended the forum and made comment expressing community concern. A transcript ofthe SIF is included in Appendix A. The Department also received one written comment from HEAT on February 27,2012,

SOCTH CAROLI:'\iA DEPARTMENT OF HEALTH AND E;\IVIRONMENTAL CONTROL**--~----~--.-~------** ---- ·-·-------- 2600 BullStreet •Columbia,SC29201 • Phone:(803)898-3432 •www.scdhec.govMs. Fleming May 01, 2012 Page 2of2

which is not germane to this action. A copy ofthis written comment and the Department's response is submitted as Attachment B. The Department held a public hearing for this revision before the Board ofHealth and Environmental Control on April 12, 2012, at which the Departmentreceived no comments. A transcript ofthis hearing is included as Appendix C. The Department will publish a final notice to revise the aforementioned portion ofthe SIP in the South Carolina State Register on April 27, 2012, at which time it will become state effective. I certifythatthe digital copies ofthis letter and the attached documents on the enclosed CD are an exact duplicate ofthe paper copies. The Department appreciates the assistance provided by you and your staffregarding the formulation of this plan. Should you or your staffhave any questions or comments concerning this SIP revision, please

### :::t=~allori**McAI~lister** ofthe Bureau ofAir Quality at (803) 898-0167 or mcallimk@dhec.sc.gov.



### . I I 

# I- ------------..7**,~~** Robert W. King, Jr., P.E. Deputy Commissioner Environmental Quality Control

ec: Scott R. Davis, Chief, AirPlanning Branch, EPA Region 4 Lynorae Benjamin, Chief, Regulatory Development Section, EPA Region 4 Richard Wong, Regulatory Development Section, EPA Region 4 Myra Reece, Chief, BAQ, SCDHEC Robert Brown, Director, Division ofAirAssessment, Innovations, and Regulation, BAQ, SCDHEC Maeve S. R. Mason, Manager, Regulation and SIP Management Section, BAQ, SCDHEC
Appendices and CD enclosure: 1. Text ofFinal Regulation (strikeout and clean copy) 2. AppendixA: Notices ofDrafting, Notice ofProposed Regulation, Staff-Led Informational Forum Sign-in Sheet and Transcript 3. Appendix B: Written Comment and Department Response 4. Appendix C: Board Public Hearing Transcript and Notice ofFinal Regulation 5. Appendix D: Copy ofLegal Authority