STATE

0FN E\IA DA Brian Sandoval, Governor ndep Department

of Conservation

& Natural Resources

LeiM.DrozrIoff,PE.DirtCor NLVADADIVI5IONo ENVIRONMENTAL PROTECTION DIVISION OF ENVIRONMENTAL PROTECTION CoHrnCrppsPhDAdminsirator pmtectingthefuwrefor generations

April 11, 2011 Jared Blumenfeld, Regional Administrator OAR-i, USEPA Region IX 75 Hawthorne Street San Francisco, CA 94105 Dear Mr. Blumenfeld: On behalf of Governor Gibbons,

ashis appointed designee, this letter transmits

to the U.S. Environmental Protection Agency (EPA) the Clark County Ozone Redesignation Request and Maintenance Plan (Plan), dated March 2011. Two hard copies of the Plan and five electronic copies areenclosed. The submittal maybe accessed electronically

at http ://www.clarkcountynv.gov/Depts/daciemlPages/StatelmplementationPlans.aspx.

The Nevada Division of Environmental Protection requests that EPA approvethe Plan into the Nevada State Implementation Plan and redesignate the Las Vegas Valley ozone nonattainment areato attainment status for the 1997 8-hour ozoneNational Ambient Air Quality Standards. The Plan was adopted by the Clark County Board of County Commissioners

onMarch 15, 2011. Evidence
of adoption, appropriate public notice and the participation process

is included
as Appendix

C. If youshould have any questions about this submittal
or require additional clarification, you maycontact Robert Tekniepe
of the Clark County Department
of Air Quality and Environmental Management

at (702) 455-4063. Sincerely, LE olleen Cripps, Ph.D. Administrator Enclosures ccw/o enclosures:
Dale Erquiaga, Senior Advisor, Office of the Governor Leo Drozdoff, Director, DCNR Michael Elges, Deputy Administrator, NDEP Greg Remer, Chief, Bureau of Air Quality Planning, NDEP Tina Gingras, Assistant Director, Clark County DAQEM Robert Tekniepe, Principal Mgmt Analyst Clark County DAQEM Lisa Hanf, Chief, Planning Office (AIR-2), Air Division, EPA Region IX Karma O’Connor, Planning Office (AIR-2), Air Division, EPA Region IX Certified Mail No. 7009 3410 0000 1454 6635DEPARTMENT
OF AIR QUALITY

& ENVIRONMENTAL MANAGEMENT 500

SGrandCentral Parkway 1stFloorBox555210Las Vegas,NV 89155-5210 (702)455-5942Fax (702) 383-9994 Lewis WallenmeyerDirectorTino Gingros Asi,tontDwector March 30, 2011 Colleen Cripps, Ph.D., Administrator Nevada Division of Environmental Protection Department
of Conservation

& Natural Resources 901 South Stewart Street, Suite 4001 Carson City, Nevada 89701-5249 RE: Clark County Ozone Redesignation Request and Maintenance Plan Dear Ms. Cripps: In satisfying the requirements

of the Clean Air Act, Sections

1 75A and

1 07(d)(3)(E),
the Clark County Department

of Air Quality and Environmental Management (DAQEM)

is pleased
to submit the Clark County Ozone Redesignation Request and Maintenance Plan (03 Maintenance Plan). DAQEM

is requesting that the U.S. Environmental Protection Agency redesignate the Clark County nonattainment areato attainment status for the 1997 8-hour Ozone National Ambient Air Quality Standard. DAQEM also requests limited approval of the motor vehicle emissions budgets and full approval of all other items in the 03 Maintenance Plan. The limited approval request

is due to the transition from the MOBILE6

to the MOVES model;

acondition that will require

afuture revision of the 03 Maintenance Plan. Enclosed arethree printed and six electronic copies of the 03 Maintenance Plan including Appendices

A, B and C. Please forward two printed and five electronic copies to EPA Region IX. If youhave any questions regarding the CO Maintenance Plan, please contact Robert Tekniepe, Principal Management Analyst
at (702) 455-4063. Sincerely, Lewis Wallenmeyer, Director Enclosures

BOARDOFCOUNTY COMMISSIONERS Susan Brager,Chair

•Steve Sisolak,Vice-Chairman LarryBrown

•TomCollinsChris Giunchigliani MaryBethScow

•Lawrence Weekly Don Burnette, County Manager