----- Forwarded by Melanie King/RTP/USEPA/US on 08/05/2010 02:42 PM
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  |Melanie King/RTP/USEPA/US                                                                                                                 
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  |Cortney_Higgins@omb.eop.gov                                                                                                               
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  |Fred Talcott/DC/USEPA/US@EPA, Michael Horowitz/DC/USEPA/US@EPA                                                                            
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  |08/05/2010 10:21 AM                                                                                                                       
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  |4SLB MACT floor analysis                                                                                                                  
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Hi Cortney,
As we discussed on the phone, if the MACT floor analysis for 4SLB engines 
included the data for engines >1000 HP, the resulting emission limit would be 
42.1 ppm CO.  If the analysis is limited to engines <1000 HP, the resulting 
emission limit is 47.0 ppm CO.  The data is in the attached spreadsheet.  The 
sheets called "All Data" show all of the data for the 4SLB engines, and the 
sheets called "top 12%" show the engines in the MACT floor and the emission 
limit calculation.
(See attached file: 4SLB MACT Floor Analysis 6-23-2010.xls)

Melanie King
Energy Strategies Group
Sector Policies and Programs Division
Office of Air Quality Planning and Standards U.S. Environmental Protection 
Agency

Mail Code D243-01
RTP, NC  27711

Phone:  (919) 541-2469
Fax:       (919) 541-5450
king.melanie@epa.gov