# To: Donnalee Jones/RTP/USEPA/US@EPA

From: "Steve Wright" <swright@cfaluminum.com>

Date: 02/29/2008 01:08PM

cc: "Bob Strieter \(Bob Strieter\)" <B Striete@aluminum.org>, "Cathy Laughner

\(CathyLaughner\)" <cathyl@bkbh.com>

Subject: Columbia Falls Aluminum Company POM Data

Dear Dr. Jones:

In response to your December 19, 2007 email request, CFAC :stockticker has amended the “plant inputPOM :stockticker-data” spreadsheet and it is attached to this email. The attached spreadsheet file also

includes a worksheet containing CFAC :stockticker ’s POM (MCSO) data and a worksheet with CFAC ’s

comments.

Please call or email if you need additional information or explanation.

# Columbia Falls Aluminum Compan y (CFAC) Comments

2/29/2008

1. CFAC's facility is comprised of 5 potlines. CFAC has not

operated all 5 potlines since 1999, due to economic

1. CFAC's estimate of annual production is the 1997 annual

production at five potline operation. 1996 production was

2. Paste plant capacity is calculated assuming 24 hr/day, 7

3. CFAC has no speciated POM emission data.

4. CFAC's methylene chloride soluble organic matter

(MCSO) emission monitoring data is provided in the

5. CFAC's paste plant is comprised of batch mixers.

6. CFAC's State of Montana regulated POM emission limits

are the same as Federal MACT requirements

7. Northwest Aluminum and CFAC did not use the same

coal tar pitch; therefore, Northwest Aluminum's speciated

POM emissions may be different than Columbia Falls

9/23/2009 Columbia Falls Aluminum Co-Input-POM-data changes 2 29 08.xlsEPA Data Request2/29/2008Columbia Falls Aluminum CompanyMethylene Chloride Soluble Organic Matter (MCSO) Test Resultslb MCSO/ton aluminum values include both primary and secondary emissionsCalendarQuarterYearPotline 1 Potline 2 Potline 3 Potline 4 Potline 5 Facilty AveragelbMCSO/tonlb MCSO/tonaluminumlb MCSO/tonaluminumlb MCSO/tonaluminumlb MCSO/tonaluminumlb MCSO/tonaluminumComments4 1999 Testing and analysis difficulties Testing and analytical issues continued; data highly variable1 20002.8 2.1 2.8 4.1 2.6 2.9Testing and analytical issues continued; data highly variable2 20002.2 3.1 3.8 3.2 3.3 3.1Testing and analytical issues continued; data highly variable3 20004.7 2.7 4.5 4.8 5.1 4.5Testing and analytical issues continued; data highly variable4 20005.1 no sample 2.8 3.6 3.2 3.6Testing and analytical issues continued; data highly variable1 2001 shut down shut down shut down shut down shut down shut down Testing and analytical issues continued; data highly variable2 2001 shut down shut down shut down shut down shut down shut down Testing and analytical issues continued; data highly variable3 2001 shut down shut down shut down shut down shut down shut down Testing and analytical issues continued; data highly variable4 2001 shut down shut down shut down shut down shut down shut down Testing and analytical issues continued; data highly variable1 2002 shut down shut down shut downstartupshut down n/a2 2002 shut down shut downstartup startup startup n/a3 2002 shut down shut down2.7 2.7 1.8 2.4Testing and analytical issues resolved4 2002 shut down shut down1.4 1.6 1.1 1.41 2003 shut down shut down 1.5 2.11.9 1.82 2003 shut down shut down shut down shut down1.7 1.73 2003 shut down shut down shut down shut down 2.5 2.54 2003 shut down shut down shut down shut down 1.8 1.81 2004 shut down shut down shut down shut down1.6 1.62 2004 shut down shut down shut down shut down1.3 1.33 2004 shut down shut down shut down shut down 2.0 2.04 2004 shut down shut down shut down shut down 1.4 1.41 2005 shut down shut down shut down shut down 1.7 1.72 2005 shut down shut down shut down shut down 1.7 1.73 2005 shut down shut down shut down shut down 1.8 1.84 2005 shut down shut down shut down shut down 1.1 1.11 2006 shut down shut down shut down shut down 1.0 1.02 2006 shut down shut down shut down shut down 1.1 1.13 2006 shut down shut down shut down shut down 1.6 1.64 2006 shut down shut down shut down shut down 1.1 1.11 2007 shut down shut down startup startup 1.6 1.62 2007 shut down shut down 2.2 3.1 1.9 2.43 2007 shut down shut down 3.2 3.0 1.9 2.74 2007 shut down shut down 1.5 1.6 1.0 1.39/23/2009Columbia Falls Aluminum Co-Input-POM-data changes 2 29 08.xlsPlant dataNo.Plant City State Type2006 Capacity(thousands ofmetric tons)Aluminumcapacity(tons/yr)Paste plantcapacity(tons/yr)Aluminum(tons/yr)PercentutilizationYear14Columbia Falls Aluminum CoColumbia Falls MT VSS185 203,500184,781189,34193.0% 1997 dataCAPACITIES ESTIMATE OF ACTUAL PRODUC9/23/20091 Columbia Falls Aluminum Co-Input-POM-data changes 2 29 08.xls