CAMD PROGRAM UPDATE

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CAMD PROGRAM UPDATE

June 21-22 2007
NACAA/EPA Ambient Air Monitoring Steering
Committee Clean Air Markets Division, OAP
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Topic Summary

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

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Network Site Status
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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

?
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Multi-Pollutant Instrument Contract

• Initiated a performance-based instrument
  procurement contract for 3.4 Million to 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)

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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

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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
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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
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Modified SASS Canister

• Acid Impregnated Filter

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
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Rural CASTNET Ozone Monitoring
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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?
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Ozone Monitor Upgrades
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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

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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
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Proposed passive ammonia sites