UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGION 4 

Robert W. King Jr., P.E. 

Deputy Commissioner 

Environmental Quality Control 

ATLANTA FEDERAL CENTER 

61 FORSYTH STREET 

ATLANTA, GEORGIA 30303-8960 

May 25, 2012 

South Carolina Department of Health 

and Environmental Control 

2600 Bull Street 

Columbia, South Carolina 29201 

Dear Mr. King: 

Thank you for the May 10, 2010, supplement to the August 31, 2007, reasonable further progress (RFP) 

plan submittal portion of the South Carolina bi-state 1997 8-hr ozone area. The bi-state Charlotte 1997 

8-hour ozone area is comprised of Charlotte-Gastonia and Rock Hill (York County) South Carolina. The 

South Carolina portion of the Rock-Hill area is comprised of a portion of York County. This RFP 

supplement included the required motor vehicle emission budget (MVEB) for volatile organic 

compounds (VOC) meeting the Clean Air Act requirements for reasonable further progress. 

Pursuant to section 93.118(e)(4) of the Transportation Conformity Rule (40 CFR Part 93, Subpart A), 

the U.S. Environmental Protection Agency (EPA) has reviewed South Carolina's RFP plan and 

supplemental information for the MVEB for the York County portion of the Charlotte bi-state area. 

This MVEB was developed with MOBILE 6.2 emission factor model. We have determined that this 

MVEB is adequate for transportation conformity purposes. 

1 

South Carolina's 1997 8-hour ozone RFP for the South Carolina portion of the Charlotte bi-state area 

has a MVEB for VOC for 2008. This MVEB, presented in the table below, is only for a partial area of 

York County, South Carolina. 

York County, South Carolina 8-hr Ozone VOC MVEB 

York County (partial area) MVEB 

2008 2008 

voc 6.053 tons per 5,493 kilograms per day 

day 

This MVEB meets the standard requirement that any MVEB must meet before it can be used to 

determine conformity for a transportation improvement program or long range transportation plan. This 

adequacy finding does not relate to the merits of the state implementation plan submittal nor does it 

indicate whether the submittal meets the requirements for approval. 

1 On May 2, 2012, the EPA sent a letter regarding adequacy for this MVEB. In the EPA's May 2, 2012, letter, the EPA 

inadvertently referred to MVEB submitted for other purposes as opposed to the RFP MVEB. This letter corrects that 

inadvertent error, and replaces EPA's May 2, 2012, letter. 

lntemet Address (URL) • http://www.epa.gov 

Recycled/Recyclable • Printed w~h Vegetable oil Based Inks on Recycled Paper (Minimum 30% Postconsumer) 
The EPA opened a comment period on the adequacy of the VOC MVEB contained in the original York 

County, South Carolina RFP plan and supplemental SIP submission by posting it on our website on May 

13,2010 (see http:llepa.govlotaqlstateresourcesltransconfladequacy.htm). The comment period closed 

on June 14,2010. Comments were received during the EPA's adequacy comment period from the 

Southern Environmental Law Center. Responses to these comments will be posted at 

http :I I epa. gov I otaql stateresourcesltransconflpastsi ps.htm. 

More information on SIPs and adequacy reviews is available on the EPA web site. The EPA will soon 

publish a notice in the Federal Register announcing this adequacy finding. The Federal Register will also 

announce the date that the adequacy finding becomes effective. The 2008 VOC MVEB will be available 

for use on the effective date. 

st:Aa~ 

Beverly H. Banister ~ Director 

Air, Pesticides, and Toxics 

Management Division