----- Forwarded by Melanie King/RTP/USEPA/US on 10/15/2009 01:31 PM

----- |------------> | From: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |"Coss, Pablo M (DEC)" <moses.coss@alaska.gov> | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | To: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |Melanie King/RTP/USEPA/US@EPA | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Cc: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |"Dalcher, Debra S (DEC)" <debra.dalcher@alaska.gov>, "Kerin, Elizabeth J (DEC)" <elizabeth.kerin@alaska.gov>, "Baumgartner, James R (DEC)"| |<jim.baumgartner@alaska.gov> | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Date: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |10/08/2009 12:32 PM | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Subject: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |FW: Alaska Rural Utility NSPS Engine Comments | >--------------------------------------------------------------------------- ---------------------------------------------------------------|

Melanie, attached are answers to you recent questions based on all we know about those engines. Let me know if there is anything else we can help you with. best regards, Moses Coss Title V Fairbanks Supervisor 907-451-2163 -----Original Message----- From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov] Sent: Tuesday, October 06, 2009 7:38 AM To: Dalcher, Debra S (DEC) Cc: Kerin, Elizabeth J (DEC); Plosay, James R (DEC); Coss, Pablo M (DEC) Subject: Re: Alaska Rural Utility NSPS Engine Comments Also I had one more question, do any of these engines have emission controls like SCR, oxidation catalyst, etc? Melanie King Energy Strategies GroupSector 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

|------------> | From: | |------------>
>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Dalcher, Debra S (DEC)" <debra.dalcher@alaska.gov> |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | To: | |------------>
>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Coss, Pablo M (DEC)" <moses.coss@alaska.gov>, "Kerin, Elizabeth J (DEC)" <elizabeth.kerin@alaska.gov> |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | Cc: | |------------>
>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Dalcher, Debra S (DEC)" <debra.dalcher@alaska.gov>, Melanie King/RTP/USEPA/US@EPA, "Plosay, James R (DEC)" <jim.plosay@alaska.gov> |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | Date: | |------------>
>----------------------------------------------------------------------------- -------------------------------------------------------------| |10/06/2009 11:17 AM |>-----------------------------------------------------------------------------

-------------------------------------------------------------| |------------> | Subject: | |------------>
>----------------------------------------------------------------------------- -------------------------------------------------------------| |Alaska Rural Utility NSPS Engine Comments |

>----------------------------------------------------------------------------- -------------------------------------------------------------|

Moses, Liz Please provide Melanie with a response to her below questions as soon as possible. Please copy me on your response. Thank you very much,
Debra -----Original Message----- From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov] Sent: Tuesday, October 06, 2009 5:15 AM To: Plosay, James R (DEC) Cc: Edwards, Alice L S (DEC); Dalcher, Debra S (DEC); Baumgartner, James R (DEC); Kuterbach, John F (DEC) Subject: Re: Alaska rural utility NSPS engine comments Hi, Thanks so much for sending the data, I really appreciate it. A couple of questions - what is the difference between the two spreadsheets? For example, are the Red Dog Mine engines in the "Rural Alaska NSPS engine" file the same engines as the Red Dog Mine engines in the "IC_Engine Source Tests" file? If so, why are the emissions so different? In the "Rural Alaska NSPS engine" sheet, why are the PM test results the same for multiple engines at the same facility? Were they tested and all the engines had the same emissions? Finally, can you tell me what test method was used for the PM tests? 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|------------>

| From: | |------------>

>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Plosay, James R (DEC)" <jim.plosay@alaska.gov> |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | To: | |------------>

>----------------------------------------------------------------------------- -------------------------------------------------------------| |Melanie King/RTP/USEPA/US@EPA |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | Cc: | |------------>

>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Edwards, Alice L S (DEC)" <alice.edwards@alaska.gov>, "Kuterbach, John F (DEC)" <john.kuterbach@alaska.gov>, "Baumgartner, James R (DEC)"| |<jim.baumgartner@alaska.gov>, "Dalcher, Debra S (DEC)" <debra.dalcher@alaska.gov> |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | Date: | |------------>

>----------------------------------------------------------------------------- -------------------------------------------------------------| |10/05/2009 12:09 PM |

>----------------------------------------------------------------------------- -------------------------------------------------------------| |------------> | Subject: | |------------>>-----------------------------------------------------------------------------

-------------------------------------------------------------| |Alaska rural utility NSPS engine comments |

>----------------------------------------------------------------------------- -------------------------------------------------------------|

<<Rural Alaska NSPS engine.xlsx>> <<IC_ENGINE SOURCE TESTS.xlsx>>

Melanie –

Attached is the data requested by EPA and processed thru ADEDC’s database. I hope this meets the requirement of your information request. Please let me know if there is anything else I can provide for you.

Jim Plosay Inspector, Title V Air Permits

Title V Permit Renewal Team Leader State of Alaska DEC AQ/APP 907-465-5561 ph 907-465-5129 fx Jim.Plosay@alaska.gov (See attached file: Rural Alaska NSPS engine.xlsx)(See attached file: IC_ENGINE SOURCE TESTS.xlsx)

[attachment "Rural Alaska NSPS engine.xlsx" deleted by Melanie King/RTP/USEPA/US] [attachment "IC_ENGINE SOURCE TESTS.xlsx" deleted by Melanie King/RTP/USEPA/US](See attached file: Questions regarding rural Alaska NSPS engines.docx)