Passive Ammonia Monitoring in the Four Corners

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Passive Ammonia Monitoring in the Four Corners

• Presented at WESTAR Technical Conference on Oil
  and Gas Development, Pinedale, Wyoming, September
  12-13, 2007
  

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Ammonia Baseline Monitoring in Four Corners Area

• In September, 2005, the Interim Emissions
  Workgroup of the Four Corners Air Quality Task
  Force recommended that an ambient monitoring
  program for gaseous ammonia be initiated in the
  Four Corners area.
• Purpose To set a current baseline of ambient
  gaseous ammonia concentrations in the Four
  Corners area that can be compared to future
  monitored values in approximately 3-5 years after
  the implementation of NOx controls (e.g. NSCR) on
  oil and gas equipment.
• The use of NSCR may increase ammonia emissions in
  the area, but these emissions have not been
  quantified and may or may not significantly
  increase, or significantly affect visibility.
• 5 sites in Four Corners area plus one rural
  reference site in Oklahoma (the Cherokee Nations
  Stilwell site) are sampling for ambient ammonia
  throughout the calendar year 2007 An additional
  source reference site in NE OK added in July,
  2007.

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Site Locations
Many thanks To NMED, Southern Ute Tribe, NPS, C
herokee Nation, and Quapaw Tribe for site operat
ions and
sample change-outs.
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Oklahoma Site Locations
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Ammonia Baseline Monitoring using Passive
Samplers

• To keep costs low for this initial screening
  study of ambient gaseous ammonia in the Four
  Corners area, Ogawa passive sampling devices
  (PSDs) are being used.
• NMED purchasing filters.
• EPA Region 6 Houston Lab is in charge of
  preparing Ogawa PSDs for ammonia sampling,
  shipping PSDs to sites via Fed-Ex or UPS, and
  conducting IC analyses of filters.
• 3-week integrated sampling at all sites.
• EPA Region 6 Dallas is conducting initial
  analysis and interpretation of the draft passive
  ammonia data and distributing to NMED, NPS,
  Southern Ute Tribe, Cherokee Nation, Quapaw
  Tribe, Four Corners Task Force, EPA R6,
  Environment Canada, OAQPS and any other
  interested parties.

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Ammonia Passive Samplers - Pictures
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