From: Hulse, David G. [mailto:David.Hulse@alcoa.com] 

Sent: Monday, September 23, 2013 4:19 PM

To: Body, Steve; Bray, Dave

Cc: Jones, James D.

Subject: FW: Wenatchee BART Test Data for USEPA Region 10

Steve and DaveHere is the testing data that we gathered at your request. As you can see, 0.005 gr/dscf may not be the 

appropriate PM limit to represent the performance capability of all of the baghouses at Wenatchee 

Works. In some cases, a higher limit may be needed.

Please let me know if you have questions, or need more information.

Thanks,

David Hulse

Alcoa Inc. – Wenatchee Works

Environmental Manager

From: Hulse, David G. [mailto:David.Hulse@alcoa.com] 

Sent: Tuesday, August 20, 2013 3:48 PM

To: Hedgpeth, Zach; Body, Steve; Bray, Dave

Cc: Jones, James D.

Subject: RE: RE: request for PM and NOx test results

Hi ZachThe 43E is up for testing this year, but we have not set a date yet. I expect that it will be within 2 

months.

The NOx factor that we use for the 62 bake furnace is 0.474 lbs NOx/Short Ton Green Anode Baked. (In 

2012, there were roughly 47,000 Short Tons of anodes baked in furnace 62.)

The NOx factor that we use for potline 5 is 0.34 lbs NOx / Short Ton Aluminum. (In 2012, we produced 

roughly 60,200 Short Tons of Aluminum in Line 5)

I don’t have any of the underlying data used to determine these factors.

I hope that this helps – let me know if you need anything else.

Dave

From: Hedgpeth, Zach [mailto:Hedgpeth.Zach@epa.gov] 

Sent: Friday, August 16, 2013 11:45 AM

To: Hulse, David G.; Body, Steve; Bray, Dave

Cc: Jones, James D.

Subject: EXT: RE: request for PM and NOx test results
Dave,

I appreciate the quick response. Yes, we would like to see the NOx emission factors 

based on similar processes at other Alcoa facilities. If you have any of the 

underlying data/calculations showing the derivation of those emission factors, that 

would also be helpful.

Also, does the 2008 test mean that 43E will be tested this year (5-year testing 

frequency)? If so, could you let us know the schedule for the testing?

Thanks, and have a good weekend...

Zach Hedgpeth

206-553-1217

From: Hulse, David G. [mailto:David.Hulse@alcoa.com] 

Sent: Friday, August 16, 2013 10:59 AM

To: Hedgpeth, Zach; Body, Steve; Bray, Dave

Cc: Jones, James D.

Subject: RE: request for PM and NOx test results

Hi ZachWe do have PM data for the 43E dust collector – it is 0.00097 grains per dscf, last tested in 

2008. We do not have NOx testing data for Potline 5, Bake furnace 62, or the A446 bake furnace 

control device. We have not developed NOx emission factors specific to those units, but we do 

have emissions factors from other Alcoa facilities with similar processes that we use to estimate 

NOx emissions for the annual Emissions Inventory report. If those would be helpful let me know 

and I will share them with you. You are correct in guessing that the 21M and 19C units have 

never been tested for PM.

Dave

From: Hedgpeth, Zach [mailto:Hedgpeth.Zach@epa.gov] 

Sent: Thursday, August 15, 2013 7:03 AM

To: Hulse, David G.

Cc: Jones, James D.; Body, Steve; Bray, Dave

Subject: EXT: request for PM and NOx test results

Dave,

As part of our BART-related work, we are trying to gather emissions data 

from the BART-eligible emission units/control devices at the Wenatchee 

smelter. We’ve obtained some of the test results by reviewing Ecology’s files, 

but have not been able to locate test results for the following 

pollutants/emission units. Could you provide any of the following emission 

test results?
Unit 43E – PM

Potline 5 – NOx

Anode Bake Furnaces/A446 – NOx

With regard to NOx, we are also interested in whether the facility has 

developed unit-specific emission factors for Potline 5 and the Anode Bake 

Furnaces.

Lastly, we expect that based on their small size, units 21M and 19C have 

never been tested for PM emissions...can you confirm this is the case?

Feel free to give me a call with any questions...

Zach Hedgpeth, PE

Air Pollution Control Technology & Emission Testing

Office of Environmental Assessment

EPA Region 10 -- Seattle

hedgpeth.zach@epa.gov

206-553-1217

From: Hulse, David G. [mailto:David.Hulse@alcoa.com] 

Sent: Friday, August 16, 2013 10:59 AM

To: Hedgpeth, Zach; Body, Steve; Bray, Dave

Cc: Jones, James D.

Subject: RE: request for PM and NOx test results

Hi ZachWe do have PM data for the 43E dust collector – it is 0.00097 grains per dscf, last tested in 2008. We do 

not have NOx testing data for Potline 5, Bake furnace 62, or the A446 bake furnace control device. We 

have not developed NOx emission factors specific to those units, but we do have emissions factors from 

other Alcoa facilities with similar processes that we use to estimate NOx emissions for the annual 

Emissions Inventory report. If those would be helpful let me know and I will share them with you. You 

are correct in guessing that the 21M and 19C units have never been tested for PM.

Dave

From: Hedgpeth, Zach [mailto:Hedgpeth.Zach@epa.gov] 

Sent: Thursday, August 15, 2013 7:03 AM

To: Hulse, David G.

Cc: Jones, James D.; Body, Steve; Bray, Dave

Subject: EXT: request for PM and NOx test results

Dave,
As part of our BART-related work, we are trying to gather emissions data from the 

BART-eligible emission units/control devices at the Wenatchee smelter. We’ve 

obtained some of the test results by reviewing Ecology’s files, but have not been able 

to locate test results for the following pollutants/emission units. Could you provide 

any of the following emission test results?

Unit 43E – PM

Potline 5 – NOx

Anode Bake Furnaces/A446 – NOx

With regard to NOx, we are also interested in whether the facility has developed 

unit-specific emission factors for Potline 5 and the Anode Bake Furnaces.

Lastly, we expect that based on their small size, units 21M and 19C have never been 

tested for PM emissions...can you confirm this is the case?

Feel free to give me a call with any questions...

Zach Hedgpeth, PE

Air Pollution Control Technology & Emission Testing

Office of Environmental Assessment

EPA Region 10 -- Seattle

hedgpeth.zach@epa.gov

206-553-1217