From: "Antonella Zanobetti" <AZANOBET@hsph.harvard.edu>

To: Zachary Pekar/RTP/USEPA/US@EPA

Cc: Susan Anenberg/RTP/USEPA/US@EPA, Pradeep Rajan/RTP/USEPA/US@EPA

Date: 01/25/2012 02:29 PM

Subject: Re: Request for adjusted (weighted) city-specific effect estimates for use in the ozone NAAQS risk 

assessment (and clarification on the nature of the study areas used)

Hi Zach,

someone else created the datasets for pollution, here is the code

*8 hour (10am-5pm) mean for ozone only;

if Parametercode in('44201') then do;

 samplecount8=n(of samplevalue10-samplevalue17);

 if samplecount8>0 then

 SampleMean8=mean(of SampleValue10-SampleValue17);

end;

Antonella

Antonella Zanobetti, PhD

Senior Research Scientist

Department of Environmental Health

Exposure, Epidemiology, and Risk Program

Harvard School of Public Health

Landmark Center - Rm. 415 K West

401 Park Drive

Boston, MA 02215

USA

phone +1 617 384 8751

fax +1 617 384 8745

email azanobet@hsph.harvard.edu

>>> Zachary Pekar <Pekar.Zachary@epamail.epa.gov> 1/25/2012 1:30 PM >>>

Antonella - forgive this question, but this looks like a 7hr spread.

Does an 8hr mean, by convention, actually span 8 clock hours, but seven

60min intervals in total? Just checking. Thanks,

zasch

Zachary Pekar, MSPH, PhD

Human Health Risk Assessment

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

tele: (919) 541-3704

e-mail: pekar.zachary@epa.gov
From:"Antonella Zanobetti" <AZANOBET@hsph.harvard.edu>

To:Zachary Pekar/RTP/USEPA/US@EPA

Cc:Susan Anenberg/RTP/USEPA/US@EPA, Pradeep

 Rajan/RTP/USEPA/US@EPA

Date:01/25/2012 10:35 AM

Subject:Re: Request for adjusted (weighted) city-specific effect

 estimates for use in the ozone NAAQS risk assessment (and

 clarification on the nature of the study areas used)

Hi Zach and Pradeep,

sorry for the delay.

the 8 hour mean for ozone was done 10am-5pm

Antonella

Antonella Zanobetti, PhD

Senior Research Scientist

Department of Environmental Health

Exposure, Epidemiology, and Risk Program

Harvard School of Public Health

Landmark Center - Rm. 415 K West

401 Park Drive

Boston, MA 02215

USA

phone +1 617 384 8751

fax +1 617 384 8745

email azanobet@hsph.harvard.edu

>>> Zachary Pekar <Pekar.Zachary@epamail.epa.gov> 1/24/2012 11:40 AM >>>

Antonella - one follow-up question - do you know the hour range for the

8-hr mean. Your last e-mail said they all used the same 8hr period. If

you could let us know what that is, we could reflect that in how we

design the risk assessment. Thanks!

zach

Zachary Pekar, MSPH, PhD

Human Health Risk Assessment
Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

tele: (919) 541-3704

e-mail: pekar.zachary@epa.gov

From:"Antonella Zanobetti" <AZANOBET@hsph.harvard.edu>

To:Zachary Pekar/RTP/USEPA/US@EPA

Date:01/10/2012 12:49 PM

Subject:Re: Request for adjusted (weighted) city-specific effect

 estimates for use in the ozone NAAQS risk assessment (and

 clarification on the nature of the study areas used)

Hi Zach,

I think we used the 8-hr mean NOT MAX. and they are te same 8hr for all

the cities.

I hope it is not a problem!!

Antonella

>>> Zachary Pekar <Pekar.Zachary@epamail.epa.gov> 1/9/2012 11:35 AM >>>

Antonella,

Thanks again for the discussion last Thursday. One additional point of

clarification. Regarding the air metric used, did you use the max 8hr

average (i.e., was the 8hr average derived for the highest ozone period

in each city - and if so, did you have the same hour range for each

city, or did it differ to match the actual high ozone period in each

city). Thanks,

zach

Zachary Pekar, MSPH, PhD

Human Health Risk Assessment

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

tele: (919) 541-3704

e-mail: pekar.zachary@epa.gov
-----"Antonella Zanobetti" <AZANOBET@hsph.harvard.edu> wrote: -----

To: Zachary Pekar/RTP/USEPA/US@EPA

From: "Antonella Zanobetti" <AZANOBET@hsph.harvard.edu>

Date: 01/05/2012 03:10PM

Subject: Re: Request for adjusted (weighted) city-specific effect

estimates for use in the ozone NAAQS risk assessment (and clarification

on the nature of the study areas used)

>>> <Pekar.Zachary@epamail.epa.gov> 12/6/2011 3:42 PM >>>

Dr. Zanobetti,

This sounds good to us. But, would it be possible for you to quickly

send us the list of counties associated with each of the cities in your

study (or at least the 12 cities we are planning to include in the risk

assessment). We had incorrectly thought that your epi study used the

MSA

as the basis for each city and if that is not the case as you have

clarified, it would be very helpful to have the actual list of counties

associated with each city (or simply the full list of counties used in

your epi study). We need to be sure we are considering the urban

spatial definition you used in your epi study in designing our risk

assessment. Having that list of counties from you would be really

helpful as we try and finalize some of the details of the risk

assessment. Thanks!

zach

Zachary Pekar, MSPH, PhD

Human Health Risk Assessment

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

tele: (919) 541-3704

e-mail: pekar.zachary@epa.gov