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CAMD PROGRAM UPDATE

CAMD PROGRAM UPDATE. June 21-22 2007. NACAA/EPA Ambient Air Monitoring Steering Committee Clean Air Markets Division, OAP. Topic Summary. CASTNET Network Status Multi-pollutant Contract Modified denuder and filter pack Ozone monitoring upgrade NADP passive ammonia monitoring

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CAMD PROGRAM UPDATE

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  1. CAMD PROGRAM UPDATE June 21-22 2007 NACAA/EPA Ambient Air Monitoring Steering Committee Clean Air Markets Division, OAP

  2. Topic Summary • CASTNET Network Status • Multi-pollutant Contract • Modified denuder and filter pack • Ozone monitoring upgrade • NADP passive ammonia monitoring • Mercury monitoring

  3. Network Site Status

  4. 2007 2008 2009 CASTNET budget in the near future • 25% Reduction in FY08 EPA CASTNET budget • Translates to 8-10 sites shutting down • Continuing reduction at NPS • Anticipate shutting down 8 sites over 5 years • Impact on Funding to NADP • Reduce Site Audit Program • Eliminate support for 10 sites • For 2008, 86 → ~69 sites • 45 EPA sites • 24 NPS sites • Facing 280K per yr Ozone QA cost • Conversion may be delayed ?

  5. Multi-Pollutant Instrument Contract • Initiated a performance-based instrument procurement contract for 3.4 Millionto identify a high resolution, multi-pollutant instrument to replace current CASTNET technology • Contractor must meet specific performance goals specified in the contract - RFP issued – March 8th - Proposals due – April 20th - Technical Evaluation Panel (TEP) – convened and currently writing the report - Award Date – July 1st (up to two contractors) • Contract Breakdown (July 2007- July 2012): - Initial Demonstration Period (30 days) - Development Period (12 months) - Final Demonstration Period (30 days) - Option to Purchase, Deploy and Operate Additional Instruments (remaining 2 years)

  6. Contract Breakdown Anticipated award of contract is July 2007 • Base Period (2 months) • 2 instruments delivered within 90 days of award • 30 day demonstration period • Must meet 75% of contract performance goals • Option Period I (12 months) • 12 month development period • Continued evaluation of progress toward contract performance goals • Option Period II (2 months) • 30 day demonstration period • Administered by a third-party (i.e., ETV Program) • Must meet all of the contract performance goals • Option Period III-IV (Remaining 2 Option years 2009-12) • Exercise option to procure and deploy additional instruments • Exercise option to operate instruments

  7. Whatman • Gaseous • SO2 Nylon • Gaseous • HNO3 • SO2 Teflon • Particulates • SO42- • NO3- • NH4+ • Ca2+, Na+, Mg2+ • Cl- Modifying the CASTNET Filterpack Concurrently exploring a more traditional alternative to online multi-pollutant analyzers • Filterpack Strengths: • Long-term Consistent Record • p-SO42- • Total NO3- (p-NO3- + HNO3) • Base Cations • Cost Potential Improvements: • Temporal Resolution (daily) • Add Ammonia (NH3) • p-NO3-/HNO3 Uncertain* • Ammonium (p-NH4+) Bias* • *chemistry on Teflon filter Airflow

  8. Met One Instruments SASS: Ambient Chemical Speciation Sampler Currently the predominant sampler in the Speciated Trends Network (STN) The STN samplers collect 24-hour every 3rd day. The SASS can be easily modified to collect sequential daily samples. The sampling method can also be modified to incorporate desired improvements. Canister

  9. Acid Impregnated Filter Modified SASS Canister Ammonium from the Nylon Filter Filter (Particulate) Nylon Filter analyzed for particulate: SO42-, NO3-, NH4+, Cl-, K+, Na+, Mg2+, and Ca2+ Denuder (2) Denuder (2) analyzed for NH3 Denuder (1) Denuder (1) analyzed for SO2 & HNO3 Inlet Rectifies p-NO3-/HNO3 Ammonia (NH3) = yes Removes Ammonium (p-NH4+) bias 24-hour samples

  10. Rural CASTNET Ozone Monitoring

  11. Ozone Monitoring Upgrades • 57 EPA CASTNET Ozone Analyzers • 37 units need replacement • 15 units on order Current models are no longer supported by the manufacturer 40 CFR Part 58, Ozone Monitoring Requirements by O3 season 2008? AIRNow and AQS by O3 season 2008?

  12. Ozone Monitor Upgrades

  13. Proposed NADP Passive Ammonia Network • Purpose: To determine actual costs of network, sampling variability and other considerations • Bi-Weekly measurements • Core network of 10 EPA-sponsored sites • Triplicate Radiello devices + field blank • Collocated with denuder or continuous ammonia monitoring • Ongoing evaluation of data will be used to determine if frequency of field blanks and replicates may be reduced • $7700 per site • QAPP & SOPs to be prepared • Total program cost $225K over two years • Additional sites may be added at $5k/site

  14. Denuder Filter Radiello Ogawa Radiellos had very promising results • Best accuracy compared to denuder measurements • Best reproducibility • Lowest detection limits Triplicate measurements From Gay and Kenski From Gay and Kenski

  15. Proposed passive ammonia sites

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