Ron Evans/RTP/USEPA/US 

08/28/2008 02:30 PM

	

To

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

cc

Al McGartland, Alexander Cristofaro/DC/USEPA/US@EPA, Charlotte
Bertrand/DC/USEPA/US@EPA, simon.nathalie@epa.gov, Brian Heninger, Lydia
Wegman, rosalina rodriguez, kathy kaufman, darryl weatherhead,
walton.tom@epa.gov, fann.neal@epa.gov, Charles Fulcher/RTP/USEPA/US@EPA,
Tricia Crabtree/RTP/USEPA/US@EPA

Subject

additional NAAQS standard level to be reviewed in the Pb NAAQS RIA









Heidi, in our conversation of Monday afternoon, you requested we
consider adding a standard level of 0.4 micrograms/m3 in addition to
0.1, 0.2, 0.3 and 0.5 levels already planned for assessment in the Pb
NAAQS RIA analysis.   Based on your request, I have instructed my RIA
staff to include a 0.4 standard level alternative in the upcoming RIA.  
It will take a little extra time to modify our models and tools to
include this endpoint but we will start on that immediately.

Ron Evans

Leader, Air Benefit & Cost Group

HEID/OAQPS/OAR/EPA

Mail Drop C-439-02

919-541-5488

919-541-0839 fax

