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C lark C ounty R egional O zone and P recursors S tudy (CCROPS)

C lark C ounty R egional O zone and P recursors S tudy (CCROPS). Robert A. Baxter, CCM T & B Systems, Inc. Background. EPA issued the nonattainment designation for the 8-hour ozone NAAQS in 2004 Clark County DAQEM charged with preparation of attainment and maintenance plans

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C lark C ounty R egional O zone and P recursors S tudy (CCROPS)

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  1. Clark County Regional Ozone and Precursors Study (CCROPS) Robert A. Baxter, CCM T & B Systems, Inc.

  2. Background • EPA issued the nonattainment designation for the 8-hour ozone NAAQS in 2004 • Clark County DAQEM charged with preparation of attainment and maintenance plans • Characterization of ozone episodes • Knowledge and understanding of various meteorological and air quality conditions leading to exceedances

  3. Ozone Studies • Emissions studies • Inventories • Emissions • Control measures • 2004/2005 CCROPS • Ozone characterization study • 2005 field study

  4. CCROPS Objectives • Obtain a data set to help understand the origin of ozone and precursors • Assess the adequacy of the Clark County monitoring network to measure peak ozone • Obtain a data set of known quality for model validation • Generate a database for current and future SIP development • Provide recommendations for future research to support modeling of ozone

  5. CCROPS MeasurementsUpper Air Meteorology • Radar wind profiler • Sodars • Rawinsondes • Pilot balloons • Glider temperature

  6. CCROPS MeasurementsSurface Ozone and Meteorology • Supplemental ozone measurements (10) • Boundary (2) • Saturation ozone measurements (13)

  7. CCROPS MeasurementsSurface Ozone and Meteorology • Supplemental ozone measurements (10) • Boundary (2) • Saturation ozone measurements (13)

  8. CCROPS MeasurementsSurface Ozone and Meteorology • Supplemental ozone measurements (10) • Boundary (2) • Saturation ozone measurements (13)

  9. CCROPS MeasurementsUpper Air Ozone • Ozonesondes • Aircraft

  10. CCROPS MeasurementsUpper Air Ozone • Ozonesondes • Aircraft

  11. CCROPS MeasurementsUpper Air Ozone • Ozonesondes • Aircraft

  12. CCROPS MeasurementsUpper Air Ozone • Ozonesondes • Aircraft

  13. CCROPS MeasurementsPrecursor and Reactive Species • Volatile Organic Compounds (VOCs) • Nitrogen species (NO2, PAN, NOy, Nitric Acid) • Enhanced DAQEM NO/NOx/NO2

  14. Ozone Site Locations

  15. Ozone Site Locations

  16. Ozone Site Locations

  17. Ozone Site Locations

  18. Sampling Schedule • Study Period = May 1 – August 31 • Intensive Operational Periods (IOPs) • May 15 – August 31 • Four periods, 1 to 2 weeks in duration • Added rawinsondes and saturation ozone • Episodes • 15 forecasted days within IOPs • Added ozonesondes, VOCs and aircraft

  19. What Have We Seen? • Ozone Patterns Similar from Characterization Study Years • Transport Scenarios • Significant Ozone Production from Regional Fires

  20. Questions? Please contact: Department of Air Quality and Environmental Management (DAQEM) (702) 455-5942

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