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From: Hulse, David G. Sent: Monday, January 06, 2014 1:35 PM To: 'Putney, David' Cc: Palazzolo, Michael A. Subject: RE: RE: Revised Files for Alcoa Inc. - Wen atchee
Works

DavidSorry that I didn't see those dimensions in the spr eadsheet that you sent - I hadn't scrolled far enough to the right. The length of the roof vents is not too far off, bu t weren't exactly correct - Lines 1-3 are about 1050 feet long and line 5 is about 1000 feet long. I am sear ching for the width information, but I can't locate it th is morning, and I know that you need to move forward o n this. 32 feet is not the right number - they should be so mething close to 10-12 feet wide. I'm working on getting y ou the correct data, and will send as soon as I have it. ( should be this afternoon)

Dave

-----Original Message----- From: Putney, David [ mailto:putney.david@epa.gov ] Sent: Friday, January 03, 2014 5:42 PM To: Hulse, David G. Cc: Palazzolo, Michael A. Subject: EXT: RE: Revised Files for Alcoa Inc. - We natchee
Works

David,

I'm not sure that I understand you correctly. Do yo u mean to say that everything looks good with the file tha t I sent on 12/18/13 or that everything looks good with the files you sent me earlier today except that those files incorrectly show a diameter for the roof vents?

As far as the dimensions of the roof vents - the dr aft file I sent on 12/18/13 shows these roof vents as having widthsp. 2 of 3

of 32 feet and a lengths of 1086 feet. If these dim ensions are incorrect then please let me know and I will ma ke sure we get the correct dimensions in the file.

Thanks,

David Putney, Environmental Engineer U.S. Environmental Protection Agency Office of Air Quality Planning and Standards Sector Policies and Programs Division 109 T.W. Alexander Drive, RTP, NC 27711 Mail Drop D243-02 Ph: (919) 541-2016 Fax: (919) 541-3207
Email: putney.david@epa.gov

-----Original Message----- From: Hulse, David G. [ mailto:David.Hulse@alcoa.com ] Sent: Friday, January 03, 2014 6:12 PM To: Putney, David Cc: Palazzolo, Michael A. Subject: FW: Revised Files for Alcoa Inc. - Wenatch ee Works

Here are the files that I submitted previously. I did
notice that the stack diameters for the roof vents are meaningless, since those don't have a "diameter". My understanding was that there is a different method employed in modeling those sources, and that a diameter was not needed. If you need dimensions (Length and width o f the roof opening), please let me know, and I will get t hem to you. Other than that, everything looks correct.

Dave

_____________________________________________ From: Hulse, David G. Sent: Monday, January 17, 2011 1:53 PM

To: Boyd.Rochelle@EPA.gov Subject: Revised Files for Alcoa Inc. - Wenatchee W orksp. 3 of 3

Attached, please find the revised kmz, ReleasePoint , and CategoryHAPs files for the Alcoa Inc. - Wenatchee W orks facility (NEI42328).

The kmz file includes both the emission points and the property boundary.

We used the fugitive (area) source approach to repr esent
the Potline Roof Vents and the Anode Bake Oven Roof Vents. Where we believe that the point should be deleted, the cell
is shaded red. The cells not shaded in red matched MACT
emissions sources and the coordinates were confirme d.

Please contact me if you have any questions.

David Hulse