From: "Timothy A. French" <tfrench@clpchicago.com>

To: Donald Kopinski/AA/USEPA/US@EPA, Charles Moulis/AA/USEPA/US@EPA

Cc: "Anders Larsson (anders.hi.larsson@volvo.com)" <anders.hi.larsson@volvo.com>, "Andrew Packer 

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<bishopricharda@johndeere.com>, "Brady Winkleman (WINKLEMAN_BRADY_L@cat.com)" 

<WINKLEMAN_BRADY_L@cat.com>, "Bruce Wolff (bruce.wolff@mtu-online.com)" <bruce.wolff@mtuonline.com>, "Christine.Ueno@mtu-online.com" <Christine.Ueno@mtu-online.com>, 

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<robert.a.jorgensen@cummins.com>, "Ryan M. Pott (rpott@yanmar.com)" <rpott@yanmar.com>, 

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"Timothy A. French" <tfrench@clpchicago.com>, "Wayne Baumberger (baumberger_wayne_j@cat.com)" 

<baumberger_wayne_j@cat.com>, "William Allen (allen_william_p@cat.com)" 

<allen_william_p@cat.com>

Date: 12/08/2010 11:47 AM

Subject: Switcher Locomotive Flexibility

Dear Don and Chuck: Back in September Christine Ueno of MTU Detroit Diesel wrote to you regarding an 

apparent error in the regulations that provide manufacturers with the flexibility to use certified nonroad 

engines in switcher locomotives. I am writing on behalf of EMA to follow up on this issue.

More specifically, under 40 CFR section 1033.150(e), engine manufacturers may produce for use in 

switch locomotives nonroad engines certified to the emission standards under Parts 89 or 1039. 

However, under section 1033.625(a)(2), locomotive manufacturers may only use certified nonroad 

engines in their switch locomotives where the nonroad emission standards under Parts 89 or 1039 “are 

numerically lower than the applicable locomotive standards.” The problem is that the nonroad CO 

standard under Part 1039 is not lower than the CO limit under Part 1033. As a result, it appears that it 
will be impossible for switcher locomotive manufacturers to utilize the intended flexibility under the 

regulations. This is likely to become a significant issue if not corrected (presumably by a technical 

amendment) in the near future.

Accordingly, please let us know where this issue stands, how the Agency intends to address it, and the 

anticipated timeline for the needed correction. Thank you. Tim French.