## C73 ~27cf~3



### MARICOPA ASSOCIATION 

### of GOVERNMENTS 302 North 1st Avenue, Suite 300 A Phoenix, Arizona 85003 Phone (602) 254-6300 A FAX (602) 254-6490 E-mail: mag@azmag.gov A Web site: www.azmag.gov June 27, 2014

Mr. Henry Darwin, Director 

## JUN 2 

## 72014 Arizona Department of Environmental Quality I 10 WestWashington Street Phoenix, Arizona 85007

. Dear Mr. Darwin: As the designated Regional Air Quality Planning Agency, the MaricopaAssociation of Governments Regional Council adopted the MAG 20 I 4 Eight-Hour Ozone Plan-Submittal of Marginal Area Requirements for the Maricopa Nonattainment Area on June 25, 20 I4. Atthistime, it is requested thatthe Arizona Department of Environmental Quality officially submit the MAG 20 14 Eight-Hour Ozone Plan-Submittal of Marginal Area Requirementsforthe Maricopa NonattainmentAreatothe Environmental ProtectionAgency(EPA)forapproval. The MAG 2014 Eight-Hour Ozone Plan-Submittal of Marginal Area Requirements for the Maricopa Nonattainment Area has been prepared in accordance with Section I 82(a) of the Clean Air Act. On May 2 I, 20 2, the Environmental ProtectionAgencydesignatedthe Maricopa nonattainmentareaas a Marginal Areaforthe 2008 eight-hourozone standard of0.075 parts per million. The plan addresses the Marginal Area requirements, such as an Emissions Statement, Baseline Emissions Inventory, Periodic Emissions Inventory, Correctionsto Pre-1990 ReasonablyAvailable Control Technology, New Source Review, Correctionsto Pre I 990 Previously Required Vehicle Inspection and Maintenance Programs, and Transportation Conformity. As a Marginal Area, the Maricopa nonattainment areawill have a December 3 I, 20 I 5 attainment date. EPA assumes that Marginal Areas will be in attainment of the eight-hour ozone standard within three years of designation withoutany additional control measures. Accordingtothe EPA proposed guidance (June 6, 2013), Marginal Areas are not required to submit an attainment demonstration, reasonably available control technologies and measures, reasonable further progress demonstration, and contingency measures. In accordance with the Clean AirAct, a public hearingwas conducted on the plan on May I 5, 2014. The public hearing process documentation is contained inAppendix B, Exhibit I. Foryourconvenience, three hard copies of the MAG 20 I 4 Eight-Hour Ozone Plan-Submittal of Marginal Area Requirements for the Maricopa NonattainmentArea and three CDs are provided. Each CD is an exact duplicate ofthe hard copy. We are lookingforwardtoworking cooperativelywiththeArizona DepartmentofEnvironmental Quality in our continuing effortsto improve airquality. Ifyou have anyquestions, please do nothesitateto contact Lindy Bauer or me at (602) 254-6300.

Executive Director

cc: Eric Massey, Arizona Department of Environmental Quality Colleen McKaughan, Environmental Protection Agency

A Voluntary Association of Local Governments in the Maricopa Region City ofApache Junction AArizona Department ofTransportation A City ofAvondale A Town of Buckeye A Town of Carefree A Town of Cave Creek A City of Chandler A Citizeno Transportatio City of El Mirage A Town of Florence Fort McDowell Yavapai Nation A Town of Fountain Hills A Town of Gila Bend A Gila River Indian Community A Town of Gilbert A City of Glendale City of Good Town of Guadalupe A City of Litchfield Park City of Maricopa A Maricopa County A City of Mesa A Town of Paradioe Valley i City of Peoria City of Phoenix A Pinal County Town of Queen Cree

Salt River Pima-Maricopa Indian Community A City of Scottsdale A City of Surprise A City ofTempe A City ofTalleson A Town of Wickenbucg A Town ofYaungtown