1. Clark County Air Quality Status Department of Air Quality and Environmental Management August 10, 2004

2. Clark County’s Current CO SIP Status EU.S. EPA approved the CO SIP on July 23, 2004. EFinal approval occurs 30 days after publication in the Federal Register (Publication date sometime in the next 30 days.)

3. Clark County’s Current CO SIP Status Status and Next Steps : ENo recorded exceedances in Clark County for last 5 years EPreparation of a Maintenance Plan and Redesignation Request to attainment status

4. Clark County’s Current PM 10 SIP Status E Publication in the Federal Register was June 9, 2004. E The 60 day window of litigation expired on August 9, 2004.

5. Clark County’s Current PM 10 SIP Status Work Underway: EInventory of vacant land and private unpaved roads EConstruction activities inventory ERefine emissions factors for vacant land

6. Clark County’s Current PM 10 SIP Status Work Underway : EPaved road PM 10 emissions measurements by vehicle based detection units EPaved road PM 10 emissions factor and reservoir depletion/recharging study (RTC) EAttainment demonstration modeling for BLM boundary expansion

7. Clark County’s Current PM 10 SIP Status Work Underway: ECompletion of the Natural Events Action Plan EIndependent audit of the PM 10 Monitoring Network (PM 10 Saturation Study)

8. Clark County’s Current PM 10 SIP Status The Future: EAttainment of the 24-Hour Standard by 2006 EMaintenance Plan and Redesignation Request

9. Ozone Designation Status EOn April 15, 2004 the U.S. EPA proposed to designate Clark County as nonattainment for Ozone effective June 15, 2004

10. Ozone Designation Status Extension Granted on Designation EGovernor sent request to Administrator of EPA to extend the June 15, 2004 effective date. EEPA granted 90 days extension to September 13, 2004

11. What are we doing? EClark County engaged Desert Research Institute to complete “Eleven-Factor Analysis” to determine appropriate boundaries EAnalysis submitted to EPA on August 4, 2004. EPA will review analysis and determine appropriate boundary.

12. Ozone SIP Development Timeline June 2007 SIP Submittal Designated Nonattainment April 15, 2004 Data Collection (May 2004 thru 2005)  Monitoring data  Emission inventory  Meteorological data Assessment of emission reduction strategies (May 2004 –2005) Draft Plan May 2004-2005 Adoption/Implementation Phase  Demonstration of attainment  Adopt rules implementing emission reduction strategies  Public Involvement and Formal Hearing Process  Prepare SIP Submittal Package

13. Clark County’s Ozone Status Currently Clark County is proceeding with eight studies : EOzone characterization study ENonroad engine inventory EVolatile Organic Compounds emitted from the use of consumer products EBiogenic emissions inventory EMobile source impact study ESodar to study ozone transport issues EComprehensive Emissions Inventory of Ozone precursors EEvaluation of Potential Control Measures

14. QUESTIONS? Please contact: The Department of Air Quality and Environmental Management (DAQEM): (702) 455-5942