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 CarolinaDepartment ofHealth

and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Dear Mr. King: Thank you for the May 10, 2010, supplementto the August 31, 2007, reasonable further progress (RFP) plan submittal portion ofthe South Carolinabi-state 1997 8-hr ozone area. The bi-state Charlotte 1997 8-hour ozone area is comprised ofCharlotte-Gastonia and Rock Hill (York County) South Carolina. The South Carolinaportion ofthe Rock-Hill area is comprised ofaportion ofYork 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. Pursuantto section 93.118(e)(4) ofthe 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 Countyportion ofthe 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 ofthe Charlotte bi-state area has a MVEB for VOC for 2008. This MVEB, presented in the table below, is only for apartial area of York County, South Carolina. York County, South Carolina 8-hr Ozone VOC MVEB YorkCounty (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 ofthe state implementationplan submittal nor does it indicate whether the submittal meets the requirements for approval.

1On 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 opposedto 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 commentperiod onthe adequacy ofthe VOC MVEB contained inthe original York County, South CarolinaRFP planand supplemental SIP submissionby posting it on ourwebsite on May 13,2010 (see http:llepa.govlotaqlstateresourcesltransconfladequacy.htm). The commentperiod closed onJune 14,2010. Comments were received during the EPA's adequacy commentperiod from the Southern Environmental Law Center. Responses to these comments will be posted at http:II epa.govIotaqlstateresourcesltransconflpastsips.htm. More information on SIPs and adequacy reviews is available onthe EPAweb site. The EPA will soon publish a notice inthe Federal Register announcing this adequacy finding. The Federal Register will also announce the date thatthe adequacy finding becomes effective. The 2008 VOC MVEB will be available for use onthe effective date.

# st:Aa~ Beverly H. Banister

# ~ Director Air, Pesticides, and Toxics Management Division