From: Palazzolo, Michael A. [mailto:Michael.Palazzolo@alcoa.com] 

Sent: Wednesday, February 04, 2009 11:27 AM 

To: Jones.Donnalee@epamail.epa.gov 

Cc: Branscome, Marvin R.; bstriete@aluminum.org; Coleman, Laura A. 

Subject: RE: industry review of revised POM data 

Hi Donna Lee, 

We finally worked our way through the revised POM data and have only a few 

comments or corrections. We have also identified some additional test data 

that we recommend EPA use to improve the POM emission factors developed for 

Anode Bake Furnace Dry Scrubber and Prebake Paste Plant Dry Coke Scrubbers. 

Our comments on the data include the following: 

1) In the POM Modeling file, there is only one roof monitor vent listed for 

the Alumax of SC facility (Mt Holly). We had two roof vents listed in the 

data file provided to EPA in June 2007. 

2) Stack parameter values (height, temperature, etc.) listed in the Updated 

NEI Nov. 3 2008 table for Alcoa Massena East are correct for Roof Vent 1, but 

incorrect for Roof Vents 2 and 3. 

3) We recognized during this review that some Alcoa's smelters listed only 

one "roof vent" for each potline in the data file provided in June 2007. 

Each prebake potline actually consists of two potrooms, so there should be 

two "roof vents" for each potline. Its not clear to us whether making this 

correction will improve EPA's planned POM modeling as we do not know how EPA 

intends to configure the potline roof vents in AERMOD/HEM. Facilities 

listing only one roof vent per potline instead of two include: Rockdale, 

Alcoa TN, Badin, Eastalco, Massena West and Mt Holly. If EPA wants to 

include each potroom roof vent separately in the model, each of these 

facilities will need to provide lat/long coordinates for the separate roof 

vents. 

Alcoa has speciated POM test reports available for the Anode Bake Furnace Dry 

Scrubber and Paste Plant Dry Coke Scrubber at the Warrick facility. Data in 

these reports could be used to improve the POM emission factors for these 

sources. I do not have the reports electronically, but will mail them to 

you. 

Thank you for the opportunity to review the data files. Please let me know 

if you have any additional questions. 

Mike 

Michael A. Palazzolo 

Alcoa, Inc 

201 Isabella Street at 7th Street Bridge 

Pittsburgh, PA 15212-5858 

Telephone: 412-553-4832 

Facsimile: 412-553-4822 
Tennessee 

Mt Holly 
Massena West (Prebake) 

Eastalco 

Baseline Source Data BART 

Potroom Coordinates (Lambert Conformal) Release Base 

Beginning 

X 

Beginning 

Y 

Ending 

X 

Ending 

Y Height Elevation

Potroom Description 

(km) (km) (km) (km) (m) (m) 

Potline A1 West (wet/SO2 scr.) 1656.836 104.582 1656.995 104.708 16.76 101.5 

Potline A1 East (wet scr.) 1656.995 104.708 1657.192 104.860 16.76 101.5 

Potline A2 (wet scr.) 1656.786 104.647 1657.141 104.925 16.76 101.5 

Potline B1 (wet scr.) 1656.728 104.722 1657.083 105.000 16.76 101.5 

Potline B2 (wet scr.) 1656.679 104.785 1657.034 105.062 16.76 101.5 

A Lambert Conformal projection is used with an origin of 40.0N, 97.0W and standard parallels 

at 33N and 45N. The NWS-84 datum is used. 

Badin 
Rockdale 

 Coordinates 

 

Beginning 

UTM E/N 

(km)

Ending 

UTM E/N 

(km)

EPN LINE ROOM km/km km/km 

F10C-1 3 12 685.060, 3382.775 

F10C-2 3 12 685.050, 3382.800 

F10C-3 3 14 684.960, 3382.720 

F10C-4 3 14 684.990, 3382.740 

F10D-1 4 16 685.065, 3382.830 

F10D-2 4 16 685.025, 3382.870 

F10D-3 4 18 684.895, 3382.775 

F10D-4 4 18 684.880, 3382.810 

F10E-1 5 20 685.000, 3382.875 

F10E-2 5 20 684.980, 3382.950 

F10E-3 5 22 684.860, 3382.860 

F10E-4 5 22 684.850, 3382.890 

F10F-1 6 24 684.975, 3382.980 

F10F-2 6 24 684.960, 3383.015 

F10F-3 6 26 684.860, 3382.925 

F10F-4 6 26 684.825, 3382.960 

F10G-1 7 28 684.930, 3383.070 

F10G-2 7 28 684.915, 3383.125 

F10G-3 7 30 684.810, 3383.300 

F10G-4 7 30 684.780, 3383.070 

F10H-1 8 32 684.910, 3383.170 

F10H-2 8 32 684.885, 3383.200 

F10H-3 8 34 684.780, 3383.110 

F10H-4 8 34 684.760, 3383.150 

Coordinates in UTM Zone 14.