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RE: Mercury from onroad mobile source

Speciated mercury estimates for mobile sources have been developed by
OTAQ and added to version 3 of the 2002 NEI.   Emissions are based on
recent testing.

anne


                                                                        
             "Jon Dettling"                                             
             <dettling@glc.or                                           
             g>                                                      To 
             Sent by:                 "'Doan, Congtru (ENE)'"           
             owner-airtoxics@         <Congtru.Doan@ontario.ca>         
             great-lakes.net                                         cc 
                                      "'Airtoxics'"                     
                                      <airtoxics@great-lakes.net>       
             01/28/2008 09:43                                   Subject 
             AM                       RE: Mercury from onroad mobile    
                                      source                            
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        




Hi Cong,

I have a faint memory of some information on this, but don’t recall the
specifics. I believe they may have stopped using the prior emission
factor because they believed that ½ of the detection limit was either
very likely to be a large overestimate or was just too uncertain. I
wonder if someone else in the group has any more specifics. If EPA is no
longer including this, it may be an item we want to try to track down a
factor for our own use in the future.

Jon

~~~~~~~~~~~~~~~~~~~
Jon Dettling
Great Lakes Commission
734-274-5183
dettling@glc.org

From: Doan, Congtru (ENE) [mailto:Congtru.Doan@ontario.ca]
Sent: Monday, January 28, 2008 9:27 AM
To: Dettling, Jon
Subject: Mercury from onroad mobile source

Hi Jon,

Do you any information on the Mercury from on-road mobile sources? The
mercury emissions decrease significantly in 2005 comparing to 2002. In
2002, the Hg emission factors were taken as haft the detection limits. I
can’t locate any mercury emissions in 2005 NEI on-road mobile source
data you posted earlier! Thanks.

Cong,h',hםo+axjjڑ+bs^
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