BOARD: Paul CAughay,111 ChairmDzr BOARD: Henry C.Scoa

C. EdHuntu. Commissioner hmotingamdpmt~tr'ng rhcbed% cftbepublic andthe mvironlllknt M. David Mitchell,MD GkMA. Ma Coleman F. Budrhow, MD

April 29,20 10

CERTIFIED 

### MAIL

A. Stanley Meiburg, Acting Regional Administrator US. EPA Region 4 Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Atlanta, GA 30303-8909
Re: South CarolinaAir QualityImplementationPlan 8-Hour Ozone AttainmentDemonstration for the Rock Hill-Fort

### Mill Area Transportation Study Metropolitan Planning Organization
Dear 

### Dr. Meiburg:
Please find attached a revised South Carolina attainment demonstration for the York Countyportion of the CharlotteGastonia-RockHill NCSC 8-Hour Ozone (Metrolina) Nonattainment Area. This attachment contains the previously submitted attainment demonstrationfor the York Countyportion of the Metrolina nonattainment area, along with the supplementalinformation required by the United States Environmental Protection Agency 

### (EPA) for approvability.
Sections 172(c), 182(a), and l82(b) of the CAA prescribe the requirements for ozone nonattainment areas. All designated nonattainment areas must comply with the general requirements mandated by Section l72(c) of the CAA. As a Subpart 2, moderate ozonenonattainment area, the Metrolina area must also meet the additional requirements prescribedby Section 182 of the CAA. Each state in which all or part of a moderate nonattainrnent area is located shallmake the submissions described under Section 182(a) (relating to marginal nonattainment areas) and shall also submit the revisions to the applicable implementationplan described under Section 182(b) with respect to moderate nonattainment areas. The South Carolina Department of Health and Environmental Control (Department) believes it has, through the measures outlined in the enclosed 8-Hour Ozone Attainment Demonstration for the Portion of York County, SC Within the Rock Hill-Fort Mill Area Transportation Study (RFATS) Metropolitan Planning Organization (MPO), fulfilled these requirements.
This attainment demonstration was first submitted on August 3 1,2007. On November 17, 2008, the Department received correspondence fiom the EPA statingthat the EPA could not approve the SIP attainment demonstration because it believed that the area was unlikely to attain the 1997 ozone standard by June 15,2010 and offered the Department the option to voluntarily request a reclassification ("bumpup") to "Serious" to avoid disapproval of the SIP. As a result the Department withdrew the attainment demonstration in order to address EPA's concerns.
SOUTH CAROLINA DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL 2600BullStreet Colu~~~l Pho~($Q3)838-8432 www&ec.govDr. Meiburg April 29, 2010 Page 2
It is worthwhileto note that the ozone concentrations decreased, along with the design value, in 2009 to such a degree that the area did qualifi to request a one-year extension of the attainment date. If the EPA had not prematurelyimposed this decision upon the Department until 

### all the information, such 

### as the 

### 2009 ozone data, was available to evaluate, withdrawal ofthe attainment demonstration, and consequently the additional burdens of revising and resubmitting, would have been avoided.
As directedby EPA, the supplementto the attainment demonstration includes:

= Attainment modeling for 20 11, Updates to the air quality data analysis including the 2009 ambient data, Additional updated information 

### on emissions and controls that would affect the air quality for the 2010 ozone season, and A Volatile Organic Compound (VOC) motor vehicle emissions budget 

### (MVEB).
The Dep-ent published a Notice of General Public Interest which included an announcementof a 30- day comment period and opportunityto request a public hearing in the StateRegister on February 26, 2010. A prehearing package was submittedto the EPA on February 26,2010. No request for a public hearing 

### was received, and the public comment period closed on March 29,2010. This notice, comments received, and Departmentresponse are included with this submittal as attachment 

### 7. Pursuant to 

### 40 CFR 5 1.102, no request for a public hearing was received by the close ofthe comment period, so the hearing scheduled for April 5,2010, was canceled, as posted on the Departmentwebsite.
RACT and Control Techniques Guidelines (CTGs) are not addressed within today's submittal. The caseby-case RACT analysis for existing sources located in the ozone nonattainment area with the potential to emit greater than 100tons per year ofNOx was submitted on August 3 1,2007.Applicability determinationsfor Group IlI and Group IV CTGs were subsequentlycompleted and negative declarations were published in the State Register on December 26,2008, and May 22,2009, respectively.
We would like to request that EPA state in its approval ofthe motor vehicle emissions budgets that they may be replaced in the 

### future by new adequate budgets as provided for 

### in 40 CFR 

### 93.1 18(e)(l).
This submittal includes: Electronic copies of the requested supplemental information, with Appendix S.1, Attainment Test. The attainmentdemonstration executive summary and narrative, Appendix F.3 (Mobile Source Emissions), Appendix 0 (Reasonable Further Progress) appended with a 2008 VOC MVEB, and a discussion of the adjustmentsmade to these original documents. Notice of General Public Interest, comments received and the Department's response.
A compact disk (CD) is being sentby mail which will includethe entire attainment demonstration, including updates, and the requested supplementalinformation. The electronic copies that the Department is sending to you via email today are identical to their counterpartson the CD.Dr. Meiburg April 29,2010 Page 3
Should you 

### or your staffhave any questionsor comments concerning this SIP attainment demonstration, please contactMs. Leslie Coolidge of the Bureau of Air Quality at 803-898-3208or via electronicmail at coolidln@dhec.sc.gov.

3- .. 

### -- 

# +jdLe Sincere1 .+



### ., ,

Y 

### '..

- 1'-

h.-t h , Robert W. King, Jr., P.E. 

### -. , Deputy Commissioner Environmental QualityControl South CarolinaDepartment of Health and Environmental Control

ec: Richard A. Schutt,Chief, Air PlanningBranch, 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 Reece, Chief, BAQ, SCDHEC Renee Shealy, Assistant Bureau Chief, BAQ, SCDHEC Robert J. Brown, Jr., Director, Div. of Air Assessment, Innovationsand Regulation,BAQ, SCDHEC 

### L. Nelson Roberts, Jr., Manager, Air Quality Standards & Assessment Section, BAQ SCDHEC Maeve S. R. Mason, Regulation and SIP Management Section,BAQ, SCDHEC Keith Overcash, Director, North CarolinaDepartment 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

Attachments: 

### - 

## -. 1. Supplementto the South Carolina 8-Hour Ozone Attainment Demonstration (originally submitted August 31,2007) for the portion of York County, South Carolina within the RFATS MPO, part ofthe Charlotte-Gastonia-RockHill, NCSC 8-Hour Ozone Nonattainment Area 2. Appendix S. 1Attainment Test 3. RFATS 8-Hour Ozone Attainment Demonstration Executive Summary and Narrative with limited revisions 4. Appendix F.3 (Mobile SourceEmissions) with limited revisions 5. Appendix 0 (Reasonable Further Progress) amended

### with a 2008 MVEB 6. Discussion of adjustmentsmade to original documents 7. Notice of General Public Interest, comments received, and the Department's response 8. Legal Authority