Document ID: EPA-HQ-OAR-2008-0708-0478
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2010-07-27T04:00Z

----- Forwarded by Melanie King/RTP/USEPA/US on 04/15/2010 03:07 PM
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  |Eric Sturm/R7/USEPA/US                                                                                                                    
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  |Melanie King/RTP/USEPA/US@EPA                                                                                                             
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  |Robert Cheever/R7/USEPA/US@EPA, Lisa Hanlon/R7/USEPA/US@EPA                                                                               
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  |04/15/2010 02:10 PM                                                                                                                       
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  |Re: Fw: rich burn engines                                                                                                                 
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Melanie,

In regards to your question to Lisa, I don't believe we have a good idea of 
controls on engines under 500 HP at major sources of HAP.  We're currently 
reviewing each of our state's policies and records on CI and SI RICE.  Of the 
12 rich burn SI found so far from the review, none have controls like NSCR 
(but I imagine they do have some sort after treatment device as supplied by 
the manufacturer).  6 of the 12 have a limit on hourly operations.

Sorry we're not of much help, but please give me a call if you would like to 
discuss further.

Thanks

Eric Sturm
Environmental Engineer | EPA | R7 Air Compliance | (P)913.551.7377 |
(C)402.310.4211

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  |Robert Cheever/R7/USEPA/US                                                                                                                
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  |Eric Sturm/R7/USEPA/US@EPA                                                                                                                
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  |04/15/2010 12:39 PM                                                                                                                       
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  |Re: Fw: rich burn engines                                                                                                                 
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Eric,

Based on what I have done so far, I can positively identify 12 rich burn RICE; 
11 in Nebraska and 1 in Iowa. However, I do not have enough detail information 
several other RICE in both of these states to say that there are not more. As 
for Missouri and Kansas; I do not as yet have enough detail information to be 
able to specify the RICE types.

For the 12 known; none that I am aware of have specific controls. 3 are 
"stand-by units and 3 are emergency generators that are limited to the amount 
of run-time per year.

As I get more detailed information I hope to be able to get to this kind of 
detail.

Bob

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  |Eric Sturm/R7/USEPA/US                                                                                                                    
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  |Robert Cheever/R7/USEPA/US@EPA                                                                                                            
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  |04/15/2010 09:00 AM                                                                                                                       
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  |Fw: rich burn engines                                                                                                                     
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Bob,

From your research so far from permits for engines/compressor stations, did 
you find any rich burn spark ignition engines with controls?  If so, what kind 
of controls?  Also, how many rich burn SI engines did you find total?

Thanks

Eric Sturm
Environmental Engineer | EPA | R7 Air Compliance | (P)913.551.7377 |
(C)402.310.4211
----- Forwarded by Eric Sturm/R7/USEPA/US on 04/15/2010 08:52 AM -----
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  |Lisa Hanlon/R7/USEPA/US                                                                                                                   
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  |Eric Sturm/R7/USEPA/US@EPA                                                                                                                
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  |04/15/2010 08:50 AM                                                                                                                       
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  |Fw: rich burn engines                                                                                                                     
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Lisa Hanlon
EPA Region 7
901 N. 5th St.
Kansas City, KS 66101
913.551.7599
hanlon.lisa@epa.gov
----- Forwarded by Lisa Hanlon/R7/USEPA/US on 04/15/2010 08:50 AM -----
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  |Melanie King/RTP/USEPA/US                                                                                                                 
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  |Lisa Hanlon/R7/USEPA/US@EPA                                                                                                               
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  |04/15/2010 08:47 AM                                                                                                                       
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  |rich burn engines                                                                                                                         
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Hi Lisa, I'm hoping you can help me with a question.  We're trying to get a 
handle on what the current landscape is for rich burn spark ignition (gas-
fired) engines in terms of how many of the existing engines that are already 
in use have emission controls (non-selective catalytic reduction or NSCR) 
installed.  The reason I'm asking this is that we are looking at what the 
impacts of the upcoming final NESHAP for existing spark ignition engines would 
be if controls were required for those engines, and it would be helpful if we 
had some idea of how many of them already have these controls even in the 
absence of the NESHAP.
The engines we'd be concerned with are those that are <500 HP at major sources 
of HAP and any HP at area sources of HAP, since we already have limits on the 
ones that are >500 HP at major sources.  Do you know of any estimates of how 
many of these engines are controlled for the states in Region 7?

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