Carbon Meeting

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Carbon Meeting

• Joann Rice
• Sacramento, CA
• January 22-23, 2008

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Old versus New CSN Carbon

• Old CSN
• MetOne SASS sampler
• 6.7 LPM flow rate with active flow control
• 46.2-mm QMA Quartz filter
• CSN TOT analysis by RTI
• OC in He (900C) EC in He/O2 (920C)
• New CSN
• URG3000N sampler (IMPROVE-like)
• 22 LPM flow rate with active flow control
• 25-mm Pallflex Quartz filter
• IMPROVE_A TOR analysis by DRI
• OC in He (580C) EC in He/O2 (840C)
• SOPs posted at http//www.epa.gov/ttn/amtic/specso
  p.html

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Old versus New CSN CarbonFirst Look

• Two months (May-June 2007) of collocated old and
  new CSN at all Phase 1 sites
• Collocation was resource restricted
• For purposes of overlap only to minimize data
  loss
• About 10-20 collocated observations per site
• No artifact adjustments made to either old or new
  CSN data
• No data screening for MDL or other outliers

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Old versus New CSN OC
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Old versus New CSN OC
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Old versus New CSN EC
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Old versus New CSN EC
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Collocated Old CSN OC
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Collocated Old CSN EC