To:

Cc:

Bcc:

Subject: Re: Peel - Response to PM Data Request

From: "Darrow, Lyndsey" <ldarrow@emory.edu>

To: Rebecca Yang/RTP/USEPA/US@EPA

Cc: Lindsay Stanek/RTP/USEPA/US@EPA, Beth Hassett-Sipple/RTP/USEPA/US@EPA, "Tolbert, 

Paige" <ptolber@emory.edu>, "jim.mulholland@ce.gatech.edu" <jim.mulholland@ce.gatech.edu>, 

"Peel,Jennifer" <Jennifer.Peel@ColoState.EDU>, "Sarnat, Stefanie Ebelt" <sebelt@emory.edu>

Date: 10/30/2009 10:05 AM

Subject: RE: Follow Up Request for PM Air Quality Data

Dear Rebecca,

I attached the PM10-2.5 statistics from the Peel 2005 study. I also included the statistics from Metzger 

et al., 2004 to preempt that request (they are the same as Peel 2005). As I mentioned to Beth , we do 

not have a collocated PM10 monitor, we add the coarse and fine fractions of PM measured at Jefferson 

Street to get our PM10 measure. 

Lyndsey

From: Yang.Rebecca@epamail.epa.gov [mailto:Yang.Rebecca@epamail.epa.gov] 

Sent: Tuesday, October 27, 2009 3:19 PM

To: Darrow, Lyndsey

Cc: Stanek.Lindsay@epamail.epa.gov; Hassett-Sipple.Beth@epamail.epa.gov

Subject: Follow Up Request for PM Air Quality Data

Dear Dr. Lyndsey Darrow,

My name is Rebecca Yang and I am writing to you on behalf of Dr. Lindsay Stanek and Ms. Beth 

Hassett-Sipple of the EPA. On October 20, 2009, an email was sent or forwarded to you requesting 

descriptive statistics on the air quality distribution data for your study listed below. I apologize for the 

repetition, but descriptive statistics for the PM10-2.5 data are also needed for that study. 

The October 20th email stated that someone would be contacting you before November 2nd as follow up 

to the email request. If your schedule permits, I would like to speak with you on Friday, October 30th in 

order to obtain the descriptive statistics for your study listed below. The statistics of most interest for the 

24-hour concentrations PM10-2.5 are the following: 

- 95th percentile

- 96th percentile

- 97th percentile

- 98th percentile

- 99th percentile

- maximum concentration value 

Because your study contains thoracic coarse PM data, the PM10 data for the same statistics as above 

are also requested. 

In respect for your time, if there is another researcher/co-author who may be able to handle this air quality 
data request (i.e., has easier access to the data), I would greatly appreciate his/her name and contact 

information. Please also note that your responses, in addition to any data you provide, will be placed in

the EPA's public docket. 

Thank you so much for your understanding and support! I apologize for the inconvenience but the data

you provide is critical for inclusion in the EPA's Integrated Science Assessment and Policy Assessment

Document for Particulate Matter. Unless I hear from you otherwise, I look forward to speaking with you on 

Friday, October 30th! Thank you for your time! 

Sincerely,

Rebecca Yang 

Student Services Contractor

U.S. Environmental Protection Agency

National Center for Environmental Assessment-RTP

PH: (919) 541-2655

Peel, J. L., P. E. Tolbert, et al. (2005). "Ambient air pollution and respiratory emergency department visits." 

Epidemiology 16(2): 164-74. 
Peel et al., 2005 

PM2.5-10 monitor used: SEARCH monitor located on Jefferson St., downtown Atlanta (not AQS) 

Measured using dichotomous sampler (not the difference between separate PM10 and PM2.5 monitor 

measurements) 

Unit: μg/m3

YEAR MEAN 95th 96th 97th 98th 99th MINIMUM MAXIMUM 

Overall 9.7 18.8 19.4 20.1 21.0 22.7 0.5 34.2 

1998* 10.0 19.6 21.0 21.0 21.8 22.5 1.5 28.6 

1999 9.4 17.9 18.1 19.3 20.3 23.0 0.5 34.2 

2000** 9.8 19.3 19.5 20.2 20.6 22.3 0.5 23.3 

 

* Aug 1-Dec 31 

** Jan 1-Aug 31 

Metzger et al., 2004 

PM2.5-10 monitor used: SEARCH monitor located on Jefferson St., downtown Atlanta (not AQS) 

Measured using dichotomous sampler (not the difference between separate PM10 and PM2.5 monitor 

measurements) 

Unit: μg/m3

YEAR MEAN 95th 96th 97th 98th 99th MINIMUM MAXIMUM 

Overall 9.7 18.8 19.4 20.1 21.0 22.7 0.5 34.2 

1998* 10.0 19.6 21.0 21.0 21.8 22.5 1.5 28.6 

1999 9.4 17.9 18.1 19.3 20.3 23.0 0.5 34.2 

2000** 9.8 19.3 19.5 20.2 20.6 22.3 0.5 23.3 

 

* Aug 1-Dec 31 

** Jan 1-Aug 31