To:

Cc:

Bcc:

Subject: Re: Symons - Response to PM Data Request

From: J Morel Symons <J-Morel.Symons@usa.dupont.com>

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

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

ageyh@jhsph.edu

Date: 11/10/2009 10:44 AM

Subject: Re: Request for PM Air Quality Data

Dear Ms. Yang:

Thank you for contacting me regarding this issue.

I am providing a spreadsheet that lists the 24-hour average PM2.5

concentrations for the duration of my published case-crossover study

(Symons JM, L Wang, et al. American Journal of Epidemiology, 2006;164

(5):421-433).

Please contact me with any further questions that you have.

(See attached file: Symons_AJE2006_24hrPMaverages.xls)

Best regards, Morel

J. Morel Symons, PhD, MPH

Supervisor, DuPont Epidemiology Program

Integrated Health Services

E.I. du Pont de Nemours and Company

1090 Elkton Road, Building S320/Room 113

Newark, DE 19711

302.366.5305 (office), 302.256.7525 (cell)

J-Morel.Symons@usa.dupont.com

 

 Yang.Rebecca@epam 

 ail.epa.gov 

 To 

 10/27/2009 02:49 J Morel Symons/AE/DuPont@DuPont 

 PM cc 

 Stanek.Lindsay@epamail.epa.gov, 

 Hassett-Sipple.Beth@epamail.epa.gov 

 Subject 

 Request for PM Air Quality Data 

Dear Dr. Symons,

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 May 2, 2009, an email was

sent or forwarded to you requesting descriptive statistics on the air

quality distribution data for PM2.5 and/or PM10-2.5 for your study listed

below. A copy of the May 2nd email request is included at the end of this

email for your reference.

As follow up to the May 2nd email, and with your schedule permitting, 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 of PM2.5 and/or PM10-2.5 are the

following:

- 95th percentile

- 96th percentile

- 97th percentile

- 98th percentile

- 99th percentile

- maximum concentration value

If your study contains thoracic coarse PM data, then 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

Symons, J. M., L. Wang, et al. (2006). "A Case-Crossover Study of Fine

Particulate Matter Air Pollution and Onset of Congestive Heart Failure

Symptom Exacerbation Leading to Hospitalization." Am J Epidemiol.
24hr_PM2.5_Symons(2006)

Date

24 hour Average 

PM2.5 (ug/m3)

Descriptive Statistics for PM2.5 24-

hour concentrations

04/01/02 9.6096

04/02/02 14.6920 Mean 16.47446025

04/03/02 12.6521 Standard Error 0.666608927

04/04/02 7.1686 Median 13.8604

04/05/02 8.4921 Mode 10.6607

04/06/02 7.5770 Standard Deviation 10.41276431

04/07/02 9.8854 Sample Variance 108.4256605

04/08/02 14.9073 Kurtosis 5.40558522

04/09/02 11.9426 Skewness 2.045304677

04/10/02 12.1838 Range 66.0088

04/11/02 10.6607 Minimum 3.2887

04/12/02 16.6317 Maximum 69.2975

04/13/02 11.1093 Count of days 244

04/14/02 9.7633

04/15/02 11.0713

04/16/02 24.7103

04/17/02 27.7799

04/18/02 19.6564

04/19/02 21.7162

04/20/02 11.8076

04/21/02 7.3308

04/22/02 9.1740

04/23/02 7.0125

04/24/02 11.6327

04/25/02 9.8054

04/26/02 9.7265

04/27/02 12.8432

04/28/02 10.7873

04/29/02 8.1241

04/30/02 9.9005

05/01/02 8.9266

05/02/02 17.2888

05/03/02 8.4569

05/04/02 6.7645

05/05/02 9.7246

05/06/02 15.1839

05/07/02 12.2474

05/08/02 10.4466

05/09/02 23.3498

05/10/02 12.7300

05/11/02 10.3828

05/12/02 14.7199

05/13/02 16.4172

05/14/02 8.8930

05/15/02 9.8110

05/16/02 16.1850

05/17/02 17.1636

05/18/02 4.1404

05/19/02 5.4254

1 of 5

24hr_PM2.5_Symons(2006)
24hr_PM2.5_Symons(2006)

Date

24 hour Average 

PM2.5 (ug/m3)

05/20/02 8.0518

05/21/02 7.9889

05/22/02 10.4139

05/23/02 13.9211

05/24/02 20.4500

05/25/02 14.2500

05/26/02 22.7100

05/27/02 17.5500

05/28/02 15.9000

05/29/02 20.4600

05/30/02 14.3000

05/31/02 13.2450

06/01/02 15.5667

06/02/02 15.4063

06/03/02 10.4417

06/04/02 11.6153

06/05/02 26.0958

06/06/02 13.3889

06/07/02 5.6826

06/08/02 11.6542

06/09/02 12.9264

06/10/02 33.5095

06/11/02 38.5528

06/12/02 29.4625

06/13/02 16.8917

06/14/02 8.0431

06/15/02 11.3486

06/16/02 13.5625

06/17/02 13.3479

06/18/02 18.2569

06/19/02 21.3375

06/20/02 21.5264

06/21/02 14.9875

06/22/02 16.3563

06/23/02 16.9764

06/24/02 36.1181

06/25/02 56.8875

06/26/02 26.9146

06/27/02 16.1771

06/28/02 14.6183

06/29/02 14.1014

06/30/02 23.0347

07/01/02 24.6438

07/02/02 59.6208

07/03/02 50.4486

07/04/02 30.4092

07/05/02 16.7478

07/06/02 25.4804

07/07/02 69.2975

2 of 5

24hr_PM2.5_Symons(2006)
24hr_PM2.5_Symons(2006)

Date

24 hour Average 

PM2.5 (ug/m3)

07/08/02 48.4098

07/09/02 41.5135

07/10/02 22.4111

07/11/02 4.3873

07/12/02 11.5887

07/13/02 10.0694

07/14/02 8.5633

07/15/02 18.8492

07/16/02 23.3855

07/17/02 19.0565

07/18/02 50.0468

07/19/02 45.2900

07/20/02 31.9044

07/21/02 28.6170

07/22/02 30.2758

07/23/02 17.9580

07/24/02 12.9600

07/25/02 6.8538

07/26/02 6.6449

07/27/02 18.7343

07/28/02 20.4937

07/29/02 22.4842

07/30/02 17.5384

07/31/02 15.7992

08/01/02 23.9657

08/02/02 26.8566

08/03/02 24.0322

08/04/02 26.0762

08/05/02 45.0977

08/06/02 11.7335

08/07/02 8.7145

08/08/02 10.6064

08/09/02 11.4247

08/10/02 14.1228

08/11/02 19.5273

08/12/02 34.8065

08/13/02 54.2916

08/14/02 36.6314

08/15/02 15.7669

08/16/02 12.9424

08/17/02 11.0668

08/18/02 18.8895

08/19/02 26.2128

08/20/02 18.8259

08/21/02 16.6527

08/22/02 18.4561

08/23/02 20.8162

08/24/02 18.5005

08/25/02 13.8809

3 of 5

24hr_PM2.5_Symons(2006)
24hr_PM2.5_Symons(2006)

Date

24 hour Average 

PM2.5 (ug/m3)

08/26/02 21.2751

08/27/02 23.0167

08/28/02 11.7342

08/29/02 5.9138

08/30/02 13.7617

08/31/02 8.0237

09/01/02 3.2887

09/02/02 9.3391

09/03/02 22.0573

09/04/02 20.0290

09/05/02 9.1224

09/06/02 9.8860

09/07/02 12.7951

09/08/02 11.1300

09/09/02 18.7133

09/10/02 16.2758

09/11/02 13.8399

09/12/02 7.7827

09/13/02 18.5314

09/14/02 19.8666

09/15/02 13.1655

09/16/02 15.5967

09/17/02 26.6907

09/18/02 21.3603

09/19/02 22.3985

09/20/02 14.0653

09/21/02 10.7310

09/22/02 6.4291

09/23/02 11.0616

09/24/02 11.4777

09/25/02 13.9766

09/26/02 7.3786

09/27/02 7.4045

09/28/02 11.6074

09/29/02 14.9301

09/30/02 15.7253

10/01/02 20.3610

10/02/02 30.9715

10/03/02 33.7202

10/04/02 39.0767

10/05/02 16.8282

10/06/02 6.0603

10/07/02 11.1726

10/08/02 6.7859

10/09/02 10.1635

10/10/02 8.2122

10/11/02 6.1793

10/12/02 4.7750

10/13/02 6.4822

4 of 5

24hr_PM2.5_Symons(2006)
24hr_PM2.5_Symons(2006)

Date

24 hour Average 

PM2.5 (ug/m3)

10/14/02 6.1227

10/15/02 7.4757

10/16/02 3.4364

10/17/02 10.7512

10/18/02 9.7428

10/19/02 15.9026

10/20/02 9.4016

10/21/02 11.1396

10/22/02 15.8436

10/23/02 16.9693

10/24/02 8.4472

10/25/02 10.6085

10/26/02 6.7301

10/27/02 15.7131

10/28/02 15.1100

10/29/02 7.4639

10/30/02 5.0018

10/31/02 10.0489

11/01/02 12.7057

11/02/02 8.8651

11/03/02 13.3918

11/04/02 13.2386

11/05/02 16.4036

11/06/02 7.1276

11/07/02 8.0095

11/08/02 16.8413

11/09/02 22.8362

11/10/02 17.1927

11/11/02 11.6587

11/12/02 10.6607

11/13/02 11.5928

11/14/02 14.2500

11/15/02 19.2709

11/16/02 13.8046

11/17/02 3.6381

11/18/02 6.1454

11/19/02 17.6284

11/20/02 26.0451

11/21/02 32.7832

11/22/02 12.8086

11/23/02 5.7361

11/24/02 16.6944

11/25/02 33.9265

11/26/02 11.3822

11/27/02 7.9167

11/28/02 5.5276

11/29/02 12.7398

11/30/02 8.8452

5 of 5

24hr_PM2.5_Symons(2006)