[ciaq] Ultrafine Particle Concentrations: Schools-Homes

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Ultrafine Particle Concentrations: Schools-Homesþ

From:

CIAQ

EMail (ciaq@...)

Sent:

April 15,

2010 2:57:19 PM

To:

Cutz, CIH

Dear

CIAQ Subscribers. The following announcement was provided by CARB staff.

Final Report on Ultrafine Particle Concentrations: Schools-Homes

The final research report on ULTRAFINE PARTICLE

CONCENTRATIONS IN SCHOOLROOMS AND HOMES, by

Doctor Nazaroff, and the University of California, Berkeley,

is now available on the ARB website,

http://www.arb.ca.gov/research/apr/past/indoor.htm.

The Air

Resources Board sponsored this research as contract 05-305.

The primary goal of this project was to better understand the nature

and concentration of ultrafine particles (UFP) in houses and

classrooms. The researchers conducted experiments on UFP and

co-pollutants in seven houses and six classrooms in the East Bay

near San Francisco, California.

Researchers’ collected

time-resolved measurements of particle number concentrations both

indoors and outdoors as well as measurements of nitric oxide, ozone,

carbon dioxide and carbon monoxide.

This research provides us with a better picture of how building

factors, human occupancy and indoor source use influence

concentrations of, and exposure to, ultrafine particles. The

researchers found that particle levels in classrooms and houses

were much higher when people occupied those environments. In

houses this was due to particles from both indoor and outdoor

sources. Indoor sources included cooking and the use of natural

gas furnaces and candles. In classrooms particle levels primarily

depended on outdoor air entering the classroom through

infiltration, mechanical ventilation, and the opening of doors

and windows. The researchers also found that people were exposed

to a higher daily average particle number of UFP in houses than

in classrooms.

You may find additional information about the Board’s Research

Program at http://www.arb.ca.gov/research/research.htm,

and

additional information about the Board’s Indoor Air Quality

Program and activities at

http://www.arb.ca.gov/research/indoor/INDOOR.HTM.

You may access the full report on our website at

http://www.arb.ca.gov/research/apr/past/indoor.htm.

If you have

problems accessing the report or the web pages, please contact

Choi at hchoi@... or

.

For questions regarding the report’s content please contact

Parent at either sparent@... or .

----

Thank you,

Philip Jalbert

CIAQ Excutive Secretary

CIAQ@...

www.epa.gov/iaq/ciaq--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------END Forwarded by Cutz, CIH (Thursday, April 15, 2010)