1 / 11

WESTAR 1-Hour NO2 Modeling Requirements

WESTAR 1-Hour NO2 Modeling Requirements. 2012 Spring Business Meeting Seattle, Washington. Goals. Review NO2 Modeling requirements to identify issues causing difficulties; Identify and prioritize realistic solutions, and; Forward solutions on to the Directors. Committee Members.

milek
Download Presentation

WESTAR 1-Hour NO2 Modeling Requirements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. WESTAR1-Hour NO2 Modeling Requirements 2012 Spring Business Meeting Seattle, Washington

  2. Goals Review NO2 Modeling requirements to identify issues causing difficulties; Identify and prioritize realistic solutions, and; Forward solutions on to the Directors.

  3. Committee Members Alan Schuler – Alaska DEC Clint Bowman – Washington Dept. of Ecology Cyra Cain – Montana DEQ Jeff Gabler – WESTAR Council Phil Allen – Oregon DEQ Tom Orth – Utah DEQ

  4. Activities Conference Calls Identify and Prioritize Issues Identify and Prioritize Realistic Solutions EPA Participation (Roger Brode): Clarify and Explain Guidance Language Summarize Current/Future Activities Discuss EPA’s Position on Important Issues Summary Report from EPA’s 10th Conference on Air Quality Modeling (Marty Gray – UT DEQ) Presented Work to Technical Committee Detailed Write-ups (see links in agenda)

  5. Important Issues Temporary/Portable/Intermittent/ Seasonal Sources In-Stack Ratios Significant Impact Level (SILs) Background Ambient Ozone Concentrations Other Monitoring Needs

  6. Solutions Temporary/Portable/Seasonal/ Intermittent Sources Craft Letter to EPA Requesting Refined Definitions & Clarifications Using Specific Examples (e.g.; Case-by-Case)

  7. Solutions In-Stack Ratios State agencies explore enhancements to compliance testing and CEM programs that would allow the instruments to report the in-stack ratio; Information compiled in national database to assist EPA in proposing more representative NO2/NOx in-stack ratios, and; Information used to identify default ratios that are process based, or it may provide support for a lower 1-hour NO2/NOx in-stack default ratio.

  8. Solutions Significant Impact Level (SIL) Seek EPA confirmation that they are willing to accept higher interim values, or even alternative approaches (such as a population-dependent range of values); NESCAUM States Use 10 ug/m3 for 1-hr NO2 SIL, and; The committee further request that EPA consider higher SILs in their pending rulemaking.

  9. Solutions Background Ambient Ozone Concentrations Establish a database of all rural hourly ozone concentrations, and corresponding NO2 and NOx values from participating states, and; Additional monitoring may be required through WESTAR financial assistance. Modeled Background Concentrations Modeling domain could cover entire western state region Modeled O3, NOx, NO2 + monitored concentrations(apply to other pollutants and interstate transport?)

  10. Solutions Other Needs EPA Needs Additional Field Studies to Fully Evaluate Modeling Options; Is WESTAR Willing to Fund a Case Study, or; Partnership with Other Regional Organization? Tasks Include: Identify participating facility Collect ambient O3, NOx and meteorological data near NOx source Measure/calculate NOx emissions and in-stack ratios Compare modeled NO2 impacts to ambient NO2 concentrations Committee will provide additional information if Directors support concept

  11. Questions &Recommendations

More Related