orwarded by Marjorie Jones/RTP/USEPA/US on 08/13/2007 10:29 AM -----

"Johansson, Robert" <Robert_C._Johansson@omb.eop.gov> 

06/15/2007 12:00 PM

	

To

Marjorie Jones/RTP/USEPA/US@EPA

cc

Subject

RE: can you clarify your comment on the NAAQS?









Hi Margie,

Does this help?

>>>

We are referring to page 9 and 39 of the benefits chapter.

Specifically, CASAC's comments (p. 9) noted in the paragraph beginning

"With respect to time-series studies..." and (p. 39) the paragraph

beginning "The Ozone Criteria Document..."

Together, these passages note three aspects of the "blunt" nature

regarding time series results:

-- Power of time-series design for disentangling effects of copollutants

when looking at small estimates

-- Plausibility of ozone-only causality given that people with

preexisting conditions spend most of their time indoors where ozone

concentrations are lower. 

-- Meteorology

________________________________________________

Robert Johansson, Ph.D.

OMB/OIRA/NREA

725 17th St. NW, Room 10202

Washington, DC 20503

(P) 202-395-7873

(F) 202-395-7285

(E) RJohansson@omb.eop.gov

 

-----Original Message-----

From: Jones.Marjorie@epamail.epa.gov

[mailto:Jones.Marjorie@epamail.epa.gov] 

Sent: Friday, June 15, 2007 10:57 AM

To: Johansson, Robert

Cc: Mckee.Dave@epamail.epa.gov; Evans.Ron@epamail.epa.gov

Subject: can you clarify your comment on the NAAQS?

Rob -- Dave McKee has asked me for the RIA language referenced in your

comments (attached) and we can't figure out what/where it is.  Can you

help?

Thanks, Margie

Marjorie C. Jones

Office of Air Quality Planning & Standards

Air Benefit and Cost Group, Mail Code C439-02

Health and Environmental Impacts Division

RTP, NC 27711

voice: (919) 541-2508

fax:     (919) 541-0839

