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 distribut ion data for your study listed below. I apologize f or 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 30t h in order to obtain the descriptive statistics for your study listed below. The statistics of most interes t 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 abo ve are also requested.

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

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 suppor t! 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 fro m you otherwise, I look forward to speaking with yo u 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 de partment visits." Epidemiology 16 (2): 164-74.

### Peel et al., 2005

PM2.5-10 monitor used: SEARCH monitor located on Je fferson St., downtown Atlanta (not AQS) Measured using dichotomous sampler (not the differe nce between separate PM10 and PM2.5 monitor measurements) Unit: μg/m 3



### YEAR MEAN 95 th 

### 96 th 

### 97 th 

### 98 th 

### 99 th 

### 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 Je fferson St., downtown Atlanta (not AQS) Measured using dichotomous sampler (not the differe nce between separate PM10 and PM2.5 monitor measurements) Unit: μg/m 3



### YEAR MEAN 95 th 

### 96 th 

### 97 th 

### 98 th 

### 99 th 

### 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