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 ofthe 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 attainmentdateto June 15,201 1, for the Charlotte-Gastonia-Rock

### Hill, North Carolina-South Carolina 8-hour OzoneModerate Nonattainment area (Metrolinaarea). Section 172(aX2)(C)ofthe Clean Air Act, as amended, allows the USEPA administratorto extend the attainment date for one year even ifthe 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 ImplementationPlan. The attainmentdemonstration and its additionshave gone through public commentand preliminary review by Region 

### 4 EPA sM,and were submitted on April 29,2010.

TheFeakralRegister notice for the Phase 1

### Final Rule to Implementthe 1997 8-hour OzoneNAAQS (69FR 2395 1) statesthat 'bder both sections l72(a)(2XC)and 181 (a)(5), an area will be eligible for the first ofthe 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 totheUSEPA's 

### Air Qualii system and 

### thatthe ambient data 

### are accurate when the quality assurance findings aretaken into consideration. NCDAQ submittedcertification letters for 

### this data to you with theirrequest for a one-year extension ofthe 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 2600Bull Street Columbia,SC29201 Phone: (803)89&3432 www.scdhec.govMr. 

### 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 ofthe attainment date for the York portion of the Metrolina area, 

### hm June 15,2010, to June 15,2011. 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, AttainmentPlanningBranch Supervisor, North Carolina DepartmentofEnvironment and Natural Resources, Division of Air Quality