Document ID: EPA-HQ-OAR-2006-0735-5163
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-05-02T04:00Z

Lydia Wegman/RTP/USEPA/US

05/01/2008 11:55 AM

	

To

"King, Heidi R." <Heidi_R._King@omb.eop.gov>

cc

Tricia Crabtree/RTP/USEPA/US@EPA, Karen Martin/RTP/USEPA/US@EPA, Mike
Clark/DC/USEPA/US@EPA, Charlotte Bertrand/DC/USEPA/US@EPA, Zachary
Pekar/RTP/USEPA/US@EPA, Robert Meyers/DC/USEPA/US@EPA, Jason
Burnett/DC/USEPA/US@EPA

Subject

Re: We'll discuss air-to-blood ratio further.  DOT edits attached.

I wanted to let you know that I talked with Karen and we are prepared to
put an asterisk on the 1:7 ratio in Table 6 and add the language you
gave us, which is "More recent evidence suggests that a ratio of 1:7
might be appropriate as well".  

 

We'll look at the DOT changes and deal with them. 

-----"King, Heidi R." <Heidi_R._King@omb.eop.gov> wrote: -----

To: Lydia Wegman/RTP/USEPA/US@EPA

From: "King, Heidi R." <Heidi_R._King@omb.eop.gov>

Date: 05/01/2008 11:48AM

cc: Tricia Crabtree/RTP/USEPA/US@EPA, Karen Martin/RTP/USEPA/US@EPA,
Mike Clark/DC/USEPA/US@EPA, Charlotte Bertrand/DC/USEPA/US@EPA, Zachary
Pekar/RTP/USEPA/US@EPA, Robert Meyers/DC/USEPA/US@EPA, Jason
Burnett/DC/USEPA/US@EPA

Subject: We'll discuss air-to-blood ratio further. DOT edits attached.

Thanks all for your time;  Attached are DOT requested edits 

 

We’re further discussing ratio 1:7. 

 

Best, 

 

heidi 

 

From: Wegman.Lydia@epamail.epa.gov [mailto:Wegman.Lydia@epamail.epa.gov]

Sent: Thursday, May 01, 2008 10:58 AM 

To: King, Heidi R. 

Cc: Beck, Nancy ; Lee, Amanda I. ; Fraas, Arthur G. ;
Crabtree.Tricia@epamail.epa.gov; Martin.Karen@epamail.epa.gov;
Meyers.Robert@epamail.epa.gov; Burnett.Jason@epamail.epa.gov;
Clark.Mike@epamail.epa.gov :PersonName;
Bertrand.Charlotte@epamail.epa.gov ; Pekar.Zachary@epamail.epa.gov 

Subject: RE: air-to-blood ratio section 

 

Yes, 11:15 is fine.  Should I set up a call-in number so Jennifer and
the RTP folks can tie-in?  Let's plan on using 4407 unless I hear
otherwise from you. 

-----"King, Heidi R." <Heidi_R._King@omb.eop.gov> wrote: ----- 

To: Lydia Wegman/RTP/USEPA/US@EPA, " Beck, Nancy :PersonName"
<Nancy_Beck@omb.eop.gov>, " Lee, Amanda I. " <Amanda_I._Lee@omb.eop.gov>

From: "King, Heidi R." <Heidi_R._King@omb.eop.gov> 

Date: 05/01/2008 10:34AM 

cc: " Fraas, Arthur G. " <Arthur_G._Fraas@omb.eop.gov>, Tricia
Crabtree/RTP/USEPA/US@EPA, Karen Martin/RTP/USEPA/US@EPA, Robert
Meyers/DC/USEPA/US@EPA, Jason Burnett/DC/USEPA/US@EPA, Mike
Clark/DC/USEPA/US@EPA, Charlotte Bertrand/DC/USEPA/US@EPA, Zachary
Pekar/RTP/USEPA/US@EPA 

Subject: RE: air-to-blood ratio section 

 

Lydia et al, 

 

How about a short 11:15 am conversation, agenda items below.  Could Zack
pls invite Jennifer Seed from OPPTS?  Maria Doa is on travel, but it
sounds like Jennifer is available at that time. Perhaps Mike and
Charlotte to reach out to Fred, the OPPTS OPEI lead, as appropriate. 

 

 

Agenda items: 

 

       Lead RRP rule baseline issue (should be quick) 

       Tables:  Agreed upon edits in Tbl 1 are not reflected in
the version we rec’d this morning; Tbl 6 looks good 

       Dept of Transportation comments – how to resolve 

       Ratios 

       Timing of next draft for review preamble 

       RIA review status 

 

Thanks, 

 

heidi 

 

From: Wegman.Lydia@epamail.epa.gov [mailto:Wegman.Lydia@epamail.epa.gov]

Sent: Thursday, May 01, 2008 8:42 AM 

To: King, Heidi R. 

Cc: Fraas, Arthur G. ; Crabtree.Tricia@epamail.epa.gov;
Martin.Karen@epamail.epa.gov; Meyers.Robert@epamail.epa.gov;
Burnett.Jason@epamail.epa.gov 

Subject: RE: air-to-blood ratio section 

 

We have talked to Jennifer Seed and Maria Doa at OPPTS.  They agree with
the footnote as written.  They are available to talk with you and us at
any time.  When would you like to talk? 

-----"King, Heidi R." <Heidi_R._King@omb.eop.gov> wrote: ----- 

To: Lydia Wegman/RTP/USEPA/US@EPA, " Fraas, Arthur G. :PersonName"
<Arthur_G._Fraas@omb.eop.gov> 

From: "King, Heidi R." <Heidi_R._King@omb.eop.gov> 

Date: 05/01/2008 07:33AM 

cc: Tricia Crabtree/RTP/USEPA/US@EPA, Karen Martin/RTP/USEPA/US@EPA,
Robert Meyers/DC/USEPA/US@EPA, Jason Burnett/DC/USEPA/US@EPA 

Subject: RE: air-to-blood ratio section 

 

I haven’t heard from OPPTS yet on the LRRP rule language; I’ll keep
trying, but if someone else has made contact pls let me know. 

 

Thank you, 

 

heidi 

 

From: Wegman.Lydia@epamail.epa.gov [mailto:Wegman.Lydia@epamail.epa.gov]

Sent: Thursday, May 01, 2008 12:46 AM 

To: King, Heidi R.; Fraas, Arthur G. :PersonName :PersonName :PersonName

Cc: Crabtree.Tricia@epamail.epa.gov; Martin.Karen@epamail.epa.gov;
Meyers.Robert@epamail.epa.gov; Burnett.Jason@epamail.epa.gov 

Subject: Re: air-to-blood ratio section 

 

We'll plan to discuss this later this morning.   

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

  From: "King, Heidi R." [Heidi_R._King@omb.eop.gov] 

  Sent: 05/01/2008 12:16 AM AST 

  To: Lydia Wegman; " Fraas, Arthur G. :PersonName :PersonName
:PersonName" <Arthur_G._Fraas@omb.eop.gov> 

  Cc: Tricia Crabtree; Karen Martin; Robert Meyers; Jason Burnett 

  Subject: RE: air-to-blood ratio section 

 

Lydia , 

Thank you for this draft.  Two comments: 

1.  We failed to note additional or clarified support for the higher
ratios.  We remain somewhat uncomfortable with characterizing the
science-based support for a ratio of 1:7 as equivalently robust to the
science-based support for standards ranging up to 1:6.  I believe
we’ll pick up the conversation in the morning. 

2.  Questions regarding “reanalysis” and “potentially” on p 4: 

 

More recently, a study of changes in children’s blood Pb levels
associated with reduced Pb emissions and associated air concentrations
near a Pb smelter in Canada (for children through age six in age)
reports a ratio of 1:6 and reanalysis << Did the Agency mean to say
additional analysis ??  Our conversation had not left me with the
impression that the Hilts dataset has been reanalyzed by the Agency >>
of the data by EPA for the initial time period of the study resulted in
a ratio of 1:7 (CD, pp. 3-23 to 3-24; Hilts, 2003). [1]   Ambient air
and blood Pb levels associated with the Hilts (2003) study range from
1.1 to 0.03 µg/m 3 , and associated population mean blood Pb levels
range from 11.5 to 4.7 µg/dL, which are lower than levels associated
with the older studies cited in the 1986 Criteria Document (USEPA,
1986). 

Sources of uncertainty potentially  << The sentence reads well without
“potentially”.  I believe these uncertainties are not potentially
related; they were identified by the author as related >> related to
air-to-blood ratios obtained from Hilts (2003) study have been
identified.   

 

 

Best regards, 

 

heidi 

 

 

 

From: Wegman.Lydia@epamail.epa.gov [mailto:Wegman.Lydia@epamail.epa.gov]

Sent: Wednesday, April 30, 2008 11:25 PM 

To: King, Heidi R.; Fraas, Arthur G. :PersonName :PersonName :PersonName

Cc: Crabtree.Tricia@epamail.epa.gov; Martin.Karen@epamail.epa.gov;
Meyers.Robert@epamail.epa.gov; Burnett.Jason@epamail.epa.gov 

Subject: Fw: air-to-blood ratio section 

 

 

-----Forwarded by Lydia Wegman/RTP/USEPA/US on 04/30/2008 11:24PM ----- 

To: Wegman Lydia@EPA 

From: Karen Martin/RTP/USEPA/US 

Date: 04/30/2008 10:28PM 

Subject: air-to-blood ratio section 

Karen Martin, Ph.D. 

Office of Air Quality Planning and Standards 

U.S. EPA (C504-06) 

Research Triangle Park , NC 27711 

phone:  (919) 541-5274 

fax:  (919) 541-0237 

martin.karen@epa.gov 

 

Y

`

€

…

”

™

㜀$␸䠀$葝ᚠ葞ᆘ摧丑?ఀT

m

Z

•

for children in the area over the full period was approximately 1:6. The
author noted limitations in the dataset associated with exposures in the
second time period, after the temporary shutdown of the facility in
2001, including sampling of a different age group at that time and a
shorter time period (3 months) at these lower ambient air Pb levels
prior to collection of blood Pb levels. Consequently, EPA calculated an
alternate air-to-blood Pb ratio based on consideration for ambient air
Pb and blood Pb reductions in the first time period (after opening of
the new facility in 1997).