----- Forwarded by Melanie King/RTP/USEPA/US on 04/07/2010 12:55 PM

----- |------------> | From: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |"Zwicke, Greg - Portland, OR" <greg.zwicke@por.usda.gov> | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | To: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |Melanie King/RTP/USEPA/US@EPA | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Cc: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |"Johnson, Greg - Portland, OR" <Greg.Johnson@por.usda.gov> | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Date: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |04/07/2010 12:20 PM | >--------------------------------------------------------------------------- ---------------------------------------------------------------| |------------> | Subject: | |------------> >--------------------------------------------------------------------------- ---------------------------------------------------------------| |RE: moving on to spark ignition engines | >--------------------------------------------------------------------------- ---------------------------------------------------------------|

Melanie, Here is the spreadsheet I put together based on the information I received from USDA-NASS, who are the compilers of the Census of Agriculture and the associated Farm & Ranch Irrigation Survey. Take a look at it, and I expect we may want to set up a time to talk about the methodology. I'll be tied up here today until about 3:00 pm your time. Tomorrow may be better, but I know I already have 2 conference calls (9:30- 10:30 am and 2:00-3:00 pm your time). Greg

************************************************************ Greg Zwicke, P.E. Air Quality Engineer Air Quality and Atmospheric Change Team USDA-NRCS West National Technology Support Center 1201 NE Lloyd Blvd., Suite 1000 Portland, OR 97232 Phone: (503) 273-2434 Fax: (503) 273-2401 E-mail: greg.zwicke@por.usda.gov ************************************************************
-----Original Message----- From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov]Sent: Tuesday, March 30, 2010 5:54 AM

To: Zwicke, Greg - Portland, OR Subject: RE: moving on to spark ignition engines No problem Greg, thanks. 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: | |------------>

>----------------------------------------------------------------------------- -------------------------------------------------------------| |"Zwicke, Greg - Portland, OR" <greg.zwicke@por.usda.gov> |

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

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

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

>----------------------------------------------------------------------------- -------------------------------------------------------------| |03/30/2010 01:45 AM |

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

>----------------------------------------------------------------------------- -------------------------------------------------------------| |RE: moving on to spark ignition engines |

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

Melanie, I did finally get a little bit of data from the National Agricultural Statistics Service on irrigation pumps that I think may be useful for helping us better estimate the inventory of agricultural engines. It's not perfect,but I think it gets us much closer. The problem is that I am currently

swamped with other EPA rule reviews. I'm hoping to get to take a closer look at the data I got from NASS by the end of the week, so would it be OK to get back with you then on what I find out? I know you were shooting for the end of March, but I know I'm going to be pretty tied up for the next few days. Greg

************************************************************ Greg Zwicke, P.E. Air Quality Engineer Air Quality and Atmospheric Change Team USDA-NRCS West National Technology Support Center 1201 NE Lloyd Blvd., Suite 1000 Portland, OR 97232 Phone: (503) 273-2434 Fax: (503) 273-2401 E-mail: greg.zwicke@por.usda.gov ************************************************************
-----Original Message----- From: King.Melanie@epamail.epa.gov [mailto:King.Melanie@epamail.epa.gov] Sent: Friday, February 26, 2010 7:54 AM To: Zwicke, Greg - Portland, OR Subject: moving on to spark ignition engines
Hi Greg, Now that the diesel engine rule has been signed, we are turning our attention to the rule for existing spark ignition engines that must be signed by August 10. I would like to avoid some of the issues we had during the interagency review process on the diesel rule regarding the split between major and area sources for irrigation engines, so if you have information on how many spark ignition irrigation sets are located at major sources of HAP versus area sources, now is the time to speak up. Please let me know if you have any information that you would like to share. Thanks! 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

(See attached file: NASS Engine Data Analysis for RICE Rule.xls)