rodes 2001 - Their Sources, Fate, and INDOOR PARTICLES 8...

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1 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 INDOOR PARTICLES Their Sources, Fate, and Contributions in Personal Exposure presented by Charles E. Rodes, PhD RTI International Research Triangle Park, NC
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2 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 1996 thru 2000: 2nd draft EPA AQCPM (March, 2001), especially after incorporating new citations [ added composition discussion, apportionment, importance of HVAC ] Important Indoor PM Information Sources Thru 1996: “Indoor Particles: A Review” (Wallace, 1996) [ summarized vanguard studies, described key indoor sources, related P , I , O ] 2001: Recent literature [adds HVAC modifications for sensitive sub-populations, HVAC model, personal cloud attribution, ultrafines, real-time PM exposure definition ]
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3 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Topic Area for Indoor Particles Why are Indoor particles important? How do Indoor sources modify PM mass? How do Indoor sources modify PM size distributions? How do Indoor sources modify PM constituents? How does the HVAC modify Indoor PM? Research needs for Indoor PM? Indoor µ E s and the Personal Cloud Model
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4 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Why is the Indoor µ E* Important for PM? * µ E - micro-Environment People spend 90+% of their time Indoors, combining home, transit, school, recreation, and work [ Wallace (1996), Kleipis et al. (2001) ] Personal exposures correlate more strongly with Indoor than Outdoor concentrations [ Janssen et al. (2000), Williams et al. (2000), Rea et al. (2001) ]
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5 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Why is the Indoor µ E* Important for PM? Importantly, there’s at least one study suggesting that Indoor particles may be as or more toxic than those outdoors – i.e. we may not yet have all the answers [ Long et al. (2001) ]
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6 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Conceptual Framework for Indoor PM ( C I + C AI ) E T C A HVAC loss C AI C AI
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7 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Source Contributions to PM Mass Strong Indoor sources - e.g. cooking and combustion: C I >> C AI [ Abt et al. (2000), Rea et al. (2001), EPA AQCPM (2001) ] contribute significantly to PM mass, and obscure associations between personal and ambient monitors.
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8 NRC Workshop on Particle Exposure Research, Session 2, November 9, 2001 Ambient aerosol penetrating Indoors constitutes approximately 50% of the PM mass for the general population, and more than 70% for the elderly.
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This note was uploaded on 05/06/2010 for the course PHAST 1 taught by Professor Donck during the Spring '10 term at École Normale Supérieure.

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rodes 2001 - Their Sources, Fate, and INDOOR PARTICLES 8...

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