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Department of Air Quality

Clark County. Department of Air Quality. CDAWG October, 2014. Staff Changes. New Manager since Nov 2013 – Mike Sword Reorganization of Planning Division People Retired Staff Reassignments. Attainment Status. PM 10 Maintenance CO Maintenance Area. 1997 O 3 Maintenance Area

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Department of Air Quality

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  1. Clark County Department of Air Quality CDAWG October, 2014

  2. Staff Changes • New Manager since Nov 2013 – Mike Sword • Reorganization of Planning Division • People Retired • Staff Reassignments

  3. Attainment Status PM10 Maintenance CO Maintenance Area 1997 O3 Maintenance Area 2008 O3 Attainment/Unclassifiable Clark County is in Attainment or Unclassifiable for PM2.5, SO2, Pband NO2

  4. Regulation Update Several rules had to be updated to avoid EPA sanctions and to approve plans: • Section 12 Rules: • Address I-SIP issues • Rules will be incorporated in the NV SIP • Sections 41, 90, 91, 92, 93 Rules: • Minor changes in order to approve PM10 Maintenance Plan/Redesignation Request

  5. Las Vegas Ozone Study (LVOS) • Assess influence of stratosphere-to-troposphere transport and long-range transport from Asia on ozone in Clark County • Use of TOPAZ (Tunable Optical Profiler of Aerosols and Ozone) • Campaign from May 19 to June 28 • At least 4 episodes of ozone intrusion – 3 episodes with Asian contribution • In 2014, using same methodology, at least 9 days were identified as stratospheric ozone intrusions • Occur more frequently in S NV than we assumed • Stratospheric Ozone Intrusions are identified in the EER as a natural event.

  6. Ozone Advance • Clark County is “on the bubble” • Current design value is 77 ppb • We want to avoid nonattainment as long as we can • On June 12, 2013, DAQ submitted participation request • On June 23, 2014, DAQ submitted the Path Forward letter • No comments from EPA yet on the Path Forward letter

  7. Projects in 2015 • Prepare for 2015 Ozone Season Study • Ozone, CO and RH instruments on Angel Peak and Arden Peak • Identify STT -> support exceptional event package • Possibly ozone monitor in Primm • Anticipate new ozone NAAQS • Analyze impacts of new NAAQS

  8. Possible Impacts of New Ozone NAAQS

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