----- Forwarded by Melanie King/RTP/USEPA/US on 04/19/2010 10:02 AM

----- |------------> | From: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |Heather Valdez/R10/USEPA/US | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | To: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |Melanie King/RTP/USEPA/US@EPA | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Date: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |04/16/2010 03:49 PM | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Subject: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |FW: Request for info related to control of existing rich burn engines | >--------------------------------------------------------------------------- ---------------------------------------------------------------|

This would cover info from all of Idaho ...

Heather Valdez Environmental Engineer EPA Region 10 Office of Air, Waste and Toxics 1200 6th Ave, Suite 900, AWT-107 Seattle WA, 98101 (206) 553-6220 valdez.heather@epa.gov

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ National Collision Repair Campaign: http://www.epa.gov/collisionrepair/ R10 Collision Repair Campaign: http://yosemite.epa.gov/R10/AIRPAGE.NSF/Collision+Repair +Campaign/crc-home

Area Source Website: http://www.epa.gov/ttn/atw/area/arearules.html -----Forwarded by Heather Valdez/R10/USEPA/US on 04/16/2010 12:45PM

----- To: Heather Valdez/R10/USEPA/US@EPA From: <Carl.Brown@deq.idaho.gov> Date: 04/16/2010 10:43AM Cc: <Zach.Klotovich@deq.idaho.gov> Subject: FW: Request for info related to control of existing rich burn engines We (meaning Zach) doesn't think we have any gas-fired engines with controls. Carl -----Original Message----- From: Zach Klotovich Sent: Thursday, April 15, 2010 3:30 PM To: Carl BrownSubject: RE: Request for info related to control of existing rich burn

engines I'm not aware of any gas-fired engines with controls. I think we'd be pretty safe with 0. -----Original Message----- From: Carl Brown Sent: Thursday, April 15, 2010 2:44 PM To: Zach Klotovich Subject: FW: Request for info related to control of existing rich burn engines Do you have any idea? -----Original Message----- From: Valdez.Heather@epamail.epa.gov [mailto:Valdez.Heather@epamail.epa.gov] Sent: Thursday, April 15, 2010 2:38 PM To: rhib461@ecy.wa.gov; toby@nwcleanair.org; paul@swcleanair.org; stevev@pscleanair.org; Fran.McNair@orcaa.org; hasan@yrcaa.org; CStuder@spokanecleanair.org; rpri@bcaa.net; LANDE.Gregg@deq.state.or.us; Ebersole.Gerald@deq.state.or.us; max@lrapa.org; Carl Brown; john.kuterbach@alaska.gov; Thomas Krinke; chris.kent@alaska.gov; kwame.agyei@alaska.gov; natalia@swcleanair.org; Zach Klotovich Subject: Request for info related to control of existing rich burn engines

Hi, I have a request from headquarters related to the NESHAP rule making for existing spark ignition engines, If you know of others who wold have a better handle on the current landscape 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 please let me know who that would be. Rich can you forward this to folks in the WA permit writers group who might be good contacts that I did not include? Headquarters is 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 theexisting engines that are already in use have emission controls (nonselective catalytic reduction or NSCR) installed because they 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. 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 10?

Heather Valdez Environmental Engineer EPA Region 10 Office of Air, Waste and Toxics 1200 6th Ave, Suite 900, AWT-107 Seattle WA, 98101 (206) 553-6220 valdez.heather@epa.gov

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ National Collision Repair Campaign: http://www.epa.gov/collisionrepair/ R10 Collision Repair Campaign: http://yosemite.epa.gov/R10/AIRPAGE.NSF/Collision+Repair +Campaign/crc-home

Area Source Website: http://www.epa.gov/ttn/atw/area/arearules.html