BOARD 

Tad C. Aughtry, IF1 

Chairman 

Edwin H. Cooper, I11 

Vice Chairman 

Steven G. Kisner 

Secretary 

May 6,20 1 0 

CERTIFIED MAIL 

- - 

BOARD: 

Henry C Scott 

M. David Mitchell, MD 

u.5. cr fi< :~K.-~lL,f; 4 , *., Glenn A. McCall PROMOTE PROTECT PROSPER L $<k [T "Ec:%ai ADN~&;sTRA~~.~ F. Buckhouse. MD C. Earl Hunter, Commissioner 

Promoting andp~otecting the health of the public and the enu 'ronment 

2010 NAY lo p 44 

A. Stanley Meiburg, Acting Regional Administrator 

U.S. EPA Region 4 

Sam Nunn Atlanta Federal Center 

61 Forsyth Street SW 

Atlanta, GA 30303-8909 

Re: Request for a One-Year Extension of the Shour Ozone Attainment Date for the Portion of 

York County, South Carolina that falls within the Rock Ell-Fort Mill Area Transportation 

Study (RF'ATS) Metropolitan Planning Organization (MPO) part of the CharlotteGastonia-Rock Hill, NC-SC 8-Hour Ozone Nonattainment Area 

Dear Dr. Meiburg: 

Pursuant to Section 181(a)(5) of the Clean Air Act as amended (CAAA), the South Carolina Department of 

Health and Environmental Control (Department) requests that the United States Environmental Protection 

Agency (USEPA) extend by one year the 1997 8-hour ozone National Ambient Air Quality Standard 

attainment date to June 15,201 1, for the Charlotte-Gastonia-Rock Hill, North Carolina-South Carolina 8-hour 

Ozone Moderate Nonattainment area (Metrolina area). Section 172(aX2)(C) of the Clean Air Act, as amended, 

allows the USEPA administrator to extend the attainment date for one year even if the area has a 3-year design 

value above the standard for the attainment year, provided certain conditions exist. South Carolina has 

complied with all requirements and commitments pertaining to the area in the South Carolina State 

Implementation Plan. The attainment demonstration and its additions have gone through public comment and 

preliminary review by Region 4 EPA sM, and were submitted on April 29,2010. 

The Feakral Register notice for the Phase 1 Final Rule to Implement the 1997 8-hour Ozone NAAQS (69 FR 

2395 1) states that 'bder both sections l72(a)(2XC) and 1 81 (a)(5), an area will be eligible for the first of the 

1-year extensions under the 8-hour standard if, for the attainment year, the area's 4th highest daily &hour 

average is 0.084 ppm or less." The MetroIina area has met this requirement for the 2009 ozone season. The 

North Carolina Division of Air Quality (NCDAQ) has certified to the USEPA that the 2009 ozone 

concentration data and quality assurance data are completely submitted to the USEPA's Air Qualii system and 

that the ambient data are accurate when the quality assurance findings are taken into consideration. NCDAQ 

submitted certification letters for this data to you with their request for a one-year extension of the attainment 

date for the Metrolina area. Below is a table of the North Carolina ozone monitors in the Metrolina area with 

the observed fourth highest 8-hour ozone concentration for the 2009 ozone season. South Carolina has no 

ozone monitors in the Metrolina area. 

SOUTH CAROLINA DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL 

2600 Bull Street Columbia, SC 29201 Phone: (803) 89&3432 www.scdhec.gov 
Mr. Meiburg 

May 6,2010 

Page 2 

Monitoring Site 

Arrowood 

County Line 

Crouse 

Rockwell Rowan 0.071 ( 

Enochville 1 Rowan 

Garinger (Plaza) 1 Mecklenburg 

Monroe I 1 Jnion 

The Department believes that the Metrolina area has met the requirements for Section l72(a)(2)(C) of the 

CAAA. Accordingly, South Carolina is requesting a one-yea. extension of the attainment date for the York 

portion of the Metrolina area, hm June 15,2010, to June 15,201 1. 

County 

Mecklenburg 

Mecklenburg 

Lincoln 

0.073 

0.069 

0.067 

Should you or your staff have any questions or comments concerning this request, please contact Nelson 

Roberts of the Bureau of Air Quality at 803-898-4122 or via electronic mail at robertln@,dhec.sc.gov. 

2009 4& Highest 

Concentration 

0.068 

0.071 

0.065 

Sincerely, 

Robert J! Brown, &, Director 

Division of Air Assessment, Innovations and Regulation 

SCDHEC Bureau of Air Quality 

ec: Richard A. Schutt, Chief, Air Planning Branch, EPA Region 4 

Lynorae Benjamin, Chief, Regulatory Development Section, EPA Region 4 

Jane Spann, Ozone Coordinator, EPA Region 4 

Zuri Farngalo, Regulatory Development Section, EPA Region 4 

Myra C. Race, Chief, Bureau of Air Quality, SCDHEC 

Renee Shealy, Assistant Bureau Chief, Bureau of Air Quality, SCDHEC 

L. Nelson Roberts, Jr., Manager, Air Quality Standards and Assessment, SCDHEC 

Maeve S.R. Mason, Manager, Air Regulation and SIP Management Section, SCDHEC 

Keith Overcash, Director, North Carolina Department of Environment and Natural Resources, 

Division of Air Quality 

Laura Boothe, Attainment Planning Branch Supervisor, North Carolina Department of Environment 

and Natural Resources, Division of Air Quality