1 

MEMORANDUM 

TO: David Putney, Environmental Protection Agency (EPA)

FROM: David Green, RTI International 

 Matt Hakos, RTI International 

DATE: November 13, 2014 

SUBJECT: Revised Draft Development of the RTR Emissions Dataset for the Primary Aluminum 

Production Source Category 

The purpose of this memorandum is to document the technical approach and rationale used to assign 

hazardous air pollutant (HAP) emissions data for primary aluminum reduction facilities. This work is 

being performed pursuant to section 112(f) of the Clean Air Act as part of the residual risk assessment 

for facilities that are subject to the National Emission Standards for Hazardous Air Pollutants 

(NESHAP) for Primary Aluminum Reduction Plants (i.e., 40 CFR part 63, subpart LL). 

I. Source-Specific Emissions, Emission Process Groups and Facilities 

Emissions estimates were developed for the following pollutant categories: speciated HAP metals, 

speciated polycyclic aromatic hydrocarbons (PAHs), speciated dioxins/furans (D/Fs), speciated 

polychlorinated biphenyls (PCBs), carbonyl sulfide (COS) and hydrogen fluoride (HF). Table 1 

summarizes the specific pollutants corresponding to these categories. 

Table 1: Summary of Pollutant Categories 

Code Pollutant Category 

Hazardous Air Pollutant Metals 

7440360 Antimony Antimony Compounds 

7440382 Arsenic Arsenic Compounds 

7440417 Beryllium Beryllium Compounds 

7440439 Cadmium Cadmium Compounds 

18540299 Chromium (VI) Chromium Compounds 

16065831 Chromium (III) Chromium Compounds 

7440484 Cobalt Cobalt Compounds 

7439921 Lead Lead Compounds 

7439965 Manganese Manganese Compounds 

7440020 Nickel Nickel Compounds 

253 Selenium & Compounds Selenium Compounds 

200 Elemental Gaseous Mercury Mercury Compounds 

201 Gaseous Divalent Mercury Mercury Compounds 

202 Particulate Divalent Mercury Mercury Compounds 

Polycyclic Aromatic Hydrocarbons 

91203 Naphthalene Naphthalene 

91576 2-Methylnaphthalene Polycyclic Organic Matter

83329 Acenaphthene Polycyclic Organic Matter 

208968 Acenaphthylene Polycyclic Organic Matter 
2 

Table 1: Summary of Pollutant Categories 

Code Pollutant Category 

86737 Fluorene Polycyclic Organic Matter 

85018 Phenanthrene Polycyclic Organic Matter 

120127 Anthracene Polycyclic Organic Matter 

206440 Fluoranthene Polycyclic Organic Matter 

129000 Pyrene Polycyclic Organic Matter 

56553 Benz[a]Anthracene Polycyclic Organic Matter 

218019 Chrysene Polycyclic Organic Matter 

205992 Benzo[b]Fluoranthene Polycyclic Organic Matter 

207089 Benzo[k]Fluoranthene Polycyclic Organic Matter 

192972 Benzo[e]Pyrene Polycyclic Organic Matter 

50328 Benzo[a]Pyrene Polycyclic Organic Matter 

198550 Perylene Polycyclic Organic Matter 

193395 Indeno[1,2,3-c,d]Pyrene Polycyclic Organic Matter 

53703 Dibenzo[a,h]Anthracene Polycyclic Organic Matter 

191242 Benzo[g,h,i,]Perylene Polycyclic Organic Matter 

Dioxins and Furans 

1746016 2,3,7,8-Tetrachlorodibenzo-p-Dioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

40321764 1,2,3,7,8-Pentachlorodibenzo-p-Dioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

39227286 1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

57653857 1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

19408743 1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

35822469 1,2,3,4,6,7,8-Heptachlorodibenzodioxin Dioxins/Furans as 2,3,7,8-TCDD TEQs 

51207319 2,3,7,8-Tetrachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

57117416 1,2,3,7,8-Pentachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

57117314 2,3,4,7,8-Pentachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

70648269 1,2,3,4,7,8-Hexachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

57117449 1,2,3,6,7,8-Hexachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

72918219 1,2,3,7,8,9-Hexachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

60851345 2,3,4,6,7,8-Hexachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

67562394 1,2,3,4,6,7,8-Heptachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

55673897 1,2,3,4,7,8,9-Heptachlorodibenzofuran Dioxins/Furans as 2,3,7,8-TCDD TEQs 

Polychlorinated Biphenyls 

70362504 3,4,4',5-TCB (PCB-81) Polychlorinated Biphenyls (Aroclors) 

32598133 3,3',4,4'-TCB (PCB-77) Polychlorinated Biphenyls (Aroclors) 

65510443 2',3,4,4',5-PeCB (PCB-123) Polychlorinated Biphenyls (Aroclors) 

31508006 2,3',4,4',5-PeCB (PCB-118) Polychlorinated Biphenyls (Aroclors) 

74472370 2,3,4,4',5-PeCB (PCB-114) Polychlorinated Biphenyls (Aroclors) 

32598144 2,3,3',4,4'-PeCB (PCB-105) Polychlorinated Biphenyls (Aroclors) 

57465288 3,3',4,4',5-PeCB (PCB-126) Polychlorinated Biphenyls (Aroclors) 

52663726 2,3',4,4',5,5'-HxCB (PCB-167) Polychlorinated Biphenyls (Aroclors) 

38380084 2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) Polychlorinated Biphenyls (Aroclors) 
3 

Table 1: Summary of Pollutant Categories 

Code Pollutant Category 

32774166 3,3',4,4',5,5'-HxCB (PCB-169) Polychlorinated Biphenyls (Aroclors) 

39635319 2,3,3',4,4',5,5'-HpCB (PCB-189) Polychlorinated Biphenyls (Aroclors) 

Carbonyl Sulfide and Hydrogen Fluoride 

463581 Carbonyl Sulfide Carbonyl Sulfide 

7664393 Hydrogen Fluoride Hydrogen Fluoride (Hydrofluoric Acid) 

These pollutants are emitted from five emission process groups at primary aluminum reduction facilities. 

Table 2 lists the emissions process groups and their corresponding pollutant categories. 

Table 2: Emission Process Groups

Emission Process 

Group 

Source 

Classification 

Code 

Emission 

Type 

Pollutant Type Emitted 

Metals PAHs D/Fs PCBs COS HF 

Potline Stack (controlled) 

30300102, 

30300113, 

30300114, 

30300116, 

30300117 

Stack Y Y Y Y Y Y 

Potline Roof Vent 

30300109, 

30300118, 

30300119, 

30300120, 

30300122 

Area Y Y Y Y * Y 

Anode Bake Furnace 30300105 Stack Y Y Y Y Y 

Paste Plant 30300112 Stack Y Y Y Y 

Pitch Storage Tank 30300123 Stack Y 

* Assumed Zero 

Emissions data were developed for fourteen individual facilitates. Table 3 details these facilities and the 

corresponding number of emission units in each emission process group. 

Table 3: Summary of Facilities and Number of Process Group Emission Points 

NEI Site ID Facility Name SubCategory 

Potline 

Stack 

Potline 

Roof 

Vent 

Anode 

Bake 

Furnace

Paste 

Plant 

Pitch 

Storage 

Tank 

NEI39458 

Alcoa - Massena 

West CWPB1 3 11 1 1 1 

NEI32661 Alcoa - Warrick CWPB1 5 10 1 1 1 

NEI42328 Alcoa - Wenatchee CWPB1 4 8 1 1 1 

NEI41217 Alumax - Mt. Holly CWPB1 4 4 1 1 1 

NEI34464 Noranda Aluminum CWPB1 4 3 3 1 1 

NEI11365 

Century Aluminum 

- Sebree CWPB1 6 6 1 1 1 

NEI6464 Alcoa - Rockdale CWPB2 45 10 1 1 0 
4 

Table 3: Summary of Facilities and Number of Process Group Emission Points 

NEI Site ID Facility Name SubCategory 

Potline 

Stack 

Potline 

Roof 

Vent 

Anode 

Bake 

Furnace

Paste 

Plant 

Pitch 

Storage 

Tank 

NEI700 

Century Aluminum 

of WV CWPB2 1 1 1 1 1 

NEIOH1110001 

Ormet Primary 

Aluminum CWPB2 6 24 0 0 0 

NEIKY0912109

100004 

Century Aluminum 

of KY CWPB3 2 8 1 1 1 

NEIWA19906 Intalco Aluminum SWPB 18 6 1 1 1 

NEI46970 

Alcoa - Massena 

East HSS 2 4 0 0 0 

NEI12468 

Columbia Falls 

Aluminum VSS2 10 10 0 1 1 

NEI5988 

Lake Charles 

Carbon NA * 0 0 2 1 1 

CWPB1 = Center-worked prebake one SWPB = Side-worked prebake 

CWPB2 = Center-worked prebake two HSS = Horizontal stud Soderberg 

CWPB3 = Center-worked prebake three VSS2 = Vertical stud Soderberg 2 

* NA = Not applicable. This facility only produces anodes and has no reduction cells 

II. Emissions Data Collection

In 2011, the EPA conducted an initial evaluation of the residual risk associated with the Primary 

Aluminum Production source category. The results of that initial residual risk review were described in 

the preamble to the proposed amendments to the NESHAP on December 6, 2011 (76 FR 76260) 

(referred to as the 2011 proposal). The comment period for the December 2011 proposal opened on 

December 6, 2011, and ended on February 1, 2012. The EPA received significant comments from 

industry representatives, environmental organizations, and state regulatory agencies. After reviewing the 

comments, and after consideration of additional data and information received since the 2011 proposal,

the EPA determined it was appropriate to revise some of the analyses associated with that proposal and

to publish a supplemental proposal. 

In support of the supplemental proposal, an information request was sent by the EPA to owners of 

currently operating primary aluminum reduction plants in March of 2013. The associated responses were 

received in May through August 2013 and were utilized in the development of the emissions data 

described in this memorandum. Note that the performance test data presented in this memorandum are 

the average of the run-by-run data provided by facilities. In instances where an individual run was below 

detection limit (BDL), half of the detection limit was used in accordance with EPA guidance. If all runs 

at all tested facilities for a particular pollutant [or, within a given subcategory in the case of arsenic, 

cadmium and nickel testing on potline stacks and roof vents, (see discussion in Section III.1.a, below)] 

were BDL, the associated pollutant emissions were assumed to be zero. Run-by-run test data are not 

presented in this document, but are available in the test reports in the project docket (Docket ID No.

EPA-HQ-OAR-2011-0797). 

COS emissions are not regulated under the 1997 NESHAP. Thus, COS emissions are not routinely 

measured and limited COS emissions test data exist for this source category. The COS emissions 

developed from emission factors used in the 2011 risk assessment form the basis of the best estimates 

available for 2013 emissions. 
5 

III. Development of Emission Rates for Modeling 

1. HAP Metals 

a. Potline Stack and Potline Roof Vent 

Emission factors in units of pounds per ton aluminum produced (lb/ton Al) for speciated HAP metals 

were developed using available performance test data. Tables 4 and 5 detail the facilities for which 

performance test data were available and summarize the emission factors developed for this effort. 

Potroom test data were available for 7 facilities. Emission factors (for all pollutants except arsenic, 

cadmium, and nickel) for the remaining 6 facilities that are equipped with potlines were developed as 

the average of the 7 test results for each pollutant. For arsenic, cadmium, and nickel, emission factors 

were based on averages of test results on a potline subcategory basis (as shown in Table 3). When only

one test report was available for potroom HAP metal emissions for a particular potroom subcategory, 

these emission factors were applied to the other units in the subcategory. Note that 13 of the 14 modeled 

facilities have potrooms. 

Chromium (VI) was measured at 2 facilities. The average mass fraction of chromium (VI) (mass 

chromium (VI) per mass total chromium) for these 2 facilities was determined as follows: 

		
	h		
			
 =

1.55 × 10 

8.44 × 10 # + 3.71 × 10 

8.50 × 10'#(

2

= 0.114

	*	h		
			
 =

1.26 × 10'

1.23 × 10,# + 2.04 × 10'1.34	× 10-#(

2

= 0.0589

The average chromium (VI) mass fraction of these 2 facilities was applied to the total chromium values

for the remaining 11 facilities (5 with test results, 6 with the average test result) to determine chromium 

(VI) emission factors in lb/ton aluminum. Chromium (III) for all 13 facilities was determined as the 

difference between total chromium and chromium (VI). 

Mercury (pollutant number 7439976) emission factors and emission rates reported in this memo were 

modeled as three different species; elemental gaseous mercury (pollutant 200), gaseous divalent mercury 

(pollutant 201) and particulate divalent mercury (pollutant 202). Emission factors for total mercury were 

multiplied by 0.80 for elemental gaseous mercury, 0.10 for gaseous divalent mercury, and 0.10 for 

particulate divalent mercury. The mercury speciation is based on mercury default speciation profiles for 

primary metal production. (http://www.epa.gov/ttn/chief/net/2005inventory.html) 
Table 4: Potline Stack HAP Metal Emission Factors 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA)- Sebree Ormet Century of KY Intalco Massena East Cent

of W

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/t

Al

7440360 Antimony 4.88E-05 4.88E-05 4.23E-05 3.48E-05 4.88E-05 1.61E-05 1.09E-04 5.78E-05 3.35E-05 4.85E-05 4.88E7440382 Arsenic 2.11E-05 2.11E-05 1.68E-04 3.02E-05 2.11E-05 3.32E-05 3.44E-04 1.95E-04 0.00E+00 2.99E-04 3.44E7440417 Beryllium 4.33E-05 4.33E-05 8.92E-07 5.17E-07 4.33E-05 1.03E-06 4.26E-06 2.84E-04 6.74E-07 1.21E-05 4.33E7440439 Cadmium 1.82E-05 1.82E-05 4.43E-06 5.32E-05 1.82E-05 1.54E-06 0.00E+00 6.38E-05 6.32E-05 0.00E+00 0.00E Total Chrome 3.05E-04 3.05E-04 3.13E-04 8.44E-05 3.05E-04 1.24E-04 1.99E-04 4.58E-04 1.09E-04 8.50E-04 3.05E16065831 Chromium III 2.71E-04 2.71E-04 2.78E-04 6.89E-05 2.71E-04 1.10E-04 1.77E-04 4.06E-04 9.70E-05 8.12E-04 2.71E18540299 Chromium (VI) 3.48E-05 3.48E-05 3.57E-05 1.55E-05 3.48E-05 1.41E-05 2.27E-05 5.21E-05 1.25E-05 3.71E-05 3.48E7440484 Cobalt 2.98E-05 2.98E-05 5.03E-06 1.63E-05 2.98E-05 1.94E-06 6.10E-05 6.22E-05 2.59E-05 3.61E-05 2.98E7439921 Lead 6.25E-04 6.25E-04 1.21E-04 1.86E-04 6.25E-04 7.63E-06 1.93E-03 9.62E-04 8.36E-04 3.34E-04 6.25E7439965 Manganese 8.79E-04 8.79E-04 2.14E-04 8.25E-05 8.79E-04 4.75E-05 3.96E-03 5.34E-04 6.73E-04 6.42E-04 8.79E7440020 Nickel 2.88E-04 2.88E-04 6.56E-04 1.11E-04 2.88E-04 9.81E-05 7.54E-04 1.96E-03 2.01E-03 1.59E-03 7.54E253 

Selenium & Compounds 1.27E-04 1.27E-04 8.86E-05 6.15E-05 1.27E-04 1.58E-05 4.89E-04 4.73E-05 6.71E-05 1.21E-04 1.27E

Total Mercury (Hg) 7.14E-06 7.14E-06 6.26E-06 1.35E-05 7.14E-06 1.35E-06 8.70E-07 2.28E-05 1.95E-06 3.30E-06 7.14E

200 

Elemental Gaseous Hg 5.71E-06 5.71E-06 5.01E-06 1.08E-05 5.71E-06 1.08E-06 6.96E-07 1.82E-05 1.56E-06 2.64E-06 5.71E

201 

Gaseous Divalent Hg 7.14E-07 7.14E-07 6.26E-07 1.35E-06 7.14E-07 1.35E-07 8.70E-08 2.28E-06 1.95E-07 3.30E-07 7.14E

202 

Particulate Divalent Hg 7.14E-07 7.14E-07 6.26E-07 1.35E-06 7.14E-07 1.35E-07 8.70E-08 2.28E-06 1.95E-07 3.30E-07 7.14E

- Blue highlighted values are original information collection test results, all other values derived based on average of test results. - N/A - no applicable emission unit at facility. - Chromium (VI) mass fraction = 0.114. - The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202).
Table 5: Potline Roof Vent HAP Metal Emission Factors 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA)- Sebree Ormet Century of KY Intalco Massena East Cent

of W

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/t

Al

7440360 Antimony 1.97E-03 1.97E-03 1.60E-04 7.70E-04 1.97E-03 3.87E-04 1.17E-02 1.08E-04 4.06E-04 2.29E-04 1.97E7440382 Arsenic 4.43E-03 4.43E-03 6.44E-03 5.70E-03 4.43E-03 1.17E-03 4.52E-03 2.23E-04 0.00E+00 7.25E-03 4.52E7440417 Beryllium 1.11E-04 1.11E-04 1.52E-05 6.97E-06 1.11E-04 3.05E-04 7.60E-05 3.06E-04 8.07E-06 5.73E-05 1.11E7440439 Cadmium 1.71E-04 1.71E-04 9.56E-05 2.51E-04 1.71E-04 1.66E-04 0.00E+00 9.38E-05 2.20E-03 2.07E-04 0.00E Total Chrome 3.08E-03 3.08E-03 2.24E-04 1.23E-03 3.08E-03 1.11E-03 1.78E-03 2.31E-03 1.51E-03 1.34E-02 3.08E16065831 Chromium III 2.90E-03 2.90E-03 

2. 

11E-04 1.10E-03 2.90E-03 1.04E-03 1.68E-03 2.18E-03 1.42E-03 1.32E-02 2.90E

18540299 Chromium (VI) 1.81E-04 1.81E-04 1.32E-05 1.26E-04 1.81E-04 6.54E-05 1.05E-04 1.36E-04 8.91E-05 2.04E-04 1.81E7440484 Cobalt 6.55E-04 6.55E-04 4.78E-05 1.10E-04 6.55E-04 3.91E-05 3.00E-03 5.24E-04 4.61E-05 8.11E-04 6.55E7439921 Lead 6.19E-03 6.19E-03 9.74E-04 7.38E-04 6.19E-03 3.51E-04 3.53E-02 1.51E-03 8.84E-04 3.64E-03 6.19E7439965 Manganese 3.90E-03 3.90E-03 5.09E-04 1.42E-03 3.90E-03 3.80E-04 1.86E-03 7.52E-03 8.78E-03 6.84E-03 3.90E7440020 Nickel 7.95E-03 7.95E-03 4.94E-03 8.82E-03 7.95E-03 1.01E-02 1.19E-02 2.36E-02 2.69E-03 4.83E-02 1.19E253 

Selenium & Compounds 1.63E-03 1.63E-03 1.66E-04 1.02E-04 1.63E-03 1.66E-04 9.51E-03 8.20E-05 8.13E-04 5.73E-04 1.63E

Total Mercury (Hg) 3.23E-05 3.23E-05 9.55E-06 4.61E-05 3.23E-05 1.31E-05 8.36E-07 8.82E-05 5.42E-05 1.41E-05 3.23E

200 

Elemental Gaseous Hg 2.58E-05 2.58E-05 7.64E-06 3.69E-05 2.58E-05 1.05E-05 6.69E-07 7.06E-05 4.34E-05 1.13E-05 2.58E

201 

Gaseous Divalent Hg 3.23E-06 3.23E-06 9.55E-07 4.61E-06 3.23E-06 1.31E-06 8.36E-08 8.82E-06 5.42E-06 1.41E-06 3.23E

202 

Particulate Divalent Hg 3.23E-06 3.23E-06 9.55E-07 4.61E-06 3.23E-06 1.31E-06 8.36E-08 8.82E-06 5.42E-06 1.41E-06 3.23E

- Blue highlighted values are original information collection test results, all other values derived based on average of test results. - N/A - no applicable emission unit at facility. - Chromium (VI) mass fraction = 0.0589. - The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202)
8 

Emission rates in units of tons pollutant per year (ton/yr) on an individual emission point basis were

developed by multiplying the emission factor (lb/ton Al) of a pollutant by the associated facility’s 

aluminum production capacity and then dividing by the number of emission release points at the facility, 

as shown: 

/			r
	1	1	 2345	647783953

:;9< = = 	>
 2 7?	647783953345	978@A58@= × B
1
C	 2345	978@A58@:;9< = ×

																																																																															Conversion	 2 K	LMN

-	OP= ÷ number	of	emission	units 

Emission rates were then applied to each emission point at a facility (e.g., all potline stack release points 

at a particular facility were assigned the same emission rate). Table 6 details the aluminum and green

anode production capacities used in the development of this data set. Appendix A contains the emission

rates developed from these factors. 

Table 6: Summary of Aluminum and Anode Production Capacities in 2013 

NEI Site ID Facility Name Aluminum Production 

Capacity (tons/yr) 

Anode Production 

Capacity (tons/yr) 

NEI39458 Alcoa - Massena West 143,300 81,681 

NEI32661 Alcoa - Warrick 295,900 168,663 

NEI42328 Alcoa - Wenatchee 202,800 115,596 

NEI41217 Alumax - Mt. Holly 246,900 140,733 

NEI34464 Noranda Aluminum 304,700 173,679 

NEI11365 

Century Aluminum (RTA) - 

Sebree 216,100 123,177 

NEIOH1110001 Ormet Primary Aluminum 292,100 0 

NEIKY091210910

0004 Century Aluminum of KY 269,000 153,330 

NEIWA19906 Intalco Aluminum 306,400 174,648 

NEI46970 Alcoa - Massena East 91,867 0 

NEI700 Century Aluminum of WV 187,400 106,818 

NEI6464 Alcoa - Rockdale 208,550 118,874 

NEI12468 Columbia Falls Aluminum 148,160 84,451 

NEI5988 Lake Charles Carbon 0 150,000 

- Alcoa - Massena East - Corrected production capacity is 2/3 of original production capacity because this facility 

permanently shut down and dismantled one of its three potlines in September of 2013. The remaining two Soderberg 

potlines at this facility were permanently shut down in March of 2013. Alcoa (the owner of this facility) has not yet 

decided whether to shut down the entire facility or to install and operate prebake potlines. 

- Columbia Falls Aluminum - Corrected production capacity is 4/5 of original production capacity based on available 

operational data from January of 2000 to the present. This facility has been idle since 2009, and having inefficient 

Soderberg technology is not expected to reopen in its present configuration. 

- For anode production, 0 anode production capacity at Ormet does not indicate 0 anode consumption in aluminum 

production but rather that the facility, prior to its shutdown in October of 2013, obtained its anodes from an offsite 

vendor as opposed to producing anodes on site. Similarly, the Alcoa-Massena East facility, prior to shutting down its 

potlines in March of 2014, obtained its anode material from an offsite vendor. 

- The Ormet Primary Aluminum facility has been idle since October of 2013 and currently is in bankruptcy proceedings. 

The Alcoa-Rockdale and Century Aluminum of West Virginia facilities are presently idle but are expected to resume 

operations once market conditions improve.
9 

b. Anode Bake Furnace and Paste Plant 

Emissions factors in units of pounds per ton green anode (lb/ton anode) for speciated HAP metals were 

developed using available performance test data. Tables 7 and 8 identify the facilities for which 

performance test data were available and summarize the emission factors developed. Anode bake 

furnace and paste plant test data were available for 3 facilities. Emission factors for the remaining 

prebake facilities that are equipped with anode bake furnaces and that are currently performing the onsite production of anodes in paste plants were developed as the average of the 3 test results for each

pollutant. 

Chromium (VI) was determined at 1 facility. The average mass fraction of chromium (VI) (i.e., mass 

chromium (VI) per mass total chromium) for the anode bake furnace and the paste plant at this facility

was determined as follows: 

W
	>
	
	h		
			
 =

1.25 × 10 

1.98 × 10 = 0.631


		
	h		
			
 =

6.38 × 10X

2.12 × 10Y = 0.301

The respective chromium (VI) mass fraction was applied to the total chromium values for the remaining 

facilities to determine chromium (VI) emission factors in lb/ton green anode. Chromium (III) for all 

facilities was determined as the difference between total chromium and chromium (VI). 

Emission rates in units of tons pollutant per year (ton/yr) on an individual emission release point basis 

were developed by multiplying the emission factor (lb/ton anode) of a pollutant by the associated 

facility’s anode production capacity and then dividing by the number of emission release points at the

facility, as shown: 

/			r
	1	1 2345	647783953

:;9< = = 	>
 27?	647783953345	954Z; = × B
1
C	 2345	954Z;:;9< = ×

																																																																															Conversion	 2 K	LMN

-	OP= ÷ number	of	emission	points 

Emission rates were then applied to each emission point at a facility (e.g., all anode bake furnace stack 

release points at a particular facility have the same emission rate). Appendix A contains the emission

rates developed from these factors. 
Table 7: Anode Bake Furnace HAP Metal Emission Factors 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA) - Sebree Ormet Century of KY Intalco Massena East Cent

of W

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/

ano

7440360 Antimony 2.98E-06 2.98E-06 4.74E-06 1.56E-06 2.98E-06 2.64E-06 N/A 2.98E-06 2.98E-06 N/A 2.98E7440382 Arsenic 5.27E-06 5.27E-06 9.49E-06 2.67E-06 5.27E-06 3.64E-06 N/A 5.27E-06 5.27E-06 N/A 5.27E7440417 Beryllium 8.71E-08 8.71E-08 9.54E-08 3.48E-08 8.71E-08 1.31E-07 N/A 8.71E-08 8.71E-08 N/A 8.71E7440439 Cadmium 3.03E-06 3.03E-06 4.74E-07 7.54E-06 3.03E-06 1.07E-06 N/A 3.03E-06 3.03E-06 N/A 3.03E Total Chrome 1.94E-05 1.94E-05 2.84E-05 1.98E-05 1.94E-05 1.00E-05 N/A 1.94E-05 1.94E-05 N/A 1.94E16065831 Chromium III 7.17E-06 7.17E-06 1.05E-05 7.30E-06 7.17E-06 3.69E-06 N/A 7.17E-06 7.17E-06 N/A 7.17E18540299 Chromium (VI) 1.22E-05 1.22E-05 1.79E-05 1.25E-05 1.22E-05 6.31E-06 N/A 1.22E-05 1.22E-05 N/A 1.22E7440484 Cobalt 2.74E-06 2.74E-06 5.73E-06 2.03E-06 2.74E-06 4.76E-07 N/A 2.74E-06 2.74E-06 N/A 2.74E7439921 Lead 9.25E-06 9.25E-06 4.74E-06 1.68E-05 9.25E-06 6.19E-06 N/A 9.25E-06 9.25E-06 N/A 9.25E7439965 Manganese 3.43E-05 3.43E-05 2.19E-05 7.45E-05 3.43E-05 6.48E-06 N/A 3.43E-05 3.43E-05 N/A 3.43E7440020 Nickel 1.92E-05 1.92E-05 3.52E-05 1.86E-05 1.92E-05 3.65E-06 N/A 1.92E-05 1.92E-05 N/A 1.92E253 

Selenium & Compounds 3.01E-05 3.01E-05 9.49E-06 7.67E-05 3.01E-05 4.22E-06 N/A 3.01E-05 3.01E-05 N/A 3.01E

Total Mercury (Hg) 1.48E-05 1.48E-05 3.39E-05 1.05E-05 1.48E-05 1.29E-07 N/A 1.48E-05 1.48E-05 N/A 1.48E

200 

Elemental Gaseous Hg 1.18E-05 1.18E-05 2.71E-05 8.40E-06 1.18E-05 1.03E-07 N/A 1.18E-05 1.18E-05 N/A 1.18E

201 

Gaseous Divalent Hg 1.48E-06 1.48E-06 3.39E-06 1.05E-06 1.48E-06 1.29E-08 N/A 1.48E-06 1.48E-06 N/A 1.48E

202 

Particulate Divalent Hg 1.48E-06 1.48E-06 3.39E-06 1.05E-06 1.48E-06 1.29E-08 N/A 1.48E-06 1.48E-06 N/A 1.48E

- Blue highlighted values are original information request test results, all other values derived based on average of test results. 

- N/A - no applicable emission unit at facility. - Chromium (VI) mass fraction = 0.631. - The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202). 
Table 8: Paste Plant HAP Metal Emission Factors 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA) - Sebree Ormet Century of KY Intalco Massena East Cent

of W

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/ton 

anode) 

(lb/

ano

7440360 Antimony 1.00E-06 1.00E-06 6.44E-07 2.50E-07 1.00E-06 2.12E-06 N/A 1.00E-06 1.00E-06 N/A 1.00E7440382 Arsenic 1.85E-06 1.85E-06 1.42E-06 1.89E-07 1.85E-06 3.93E-06 N/A 1.85E-06 1.85E-06 N/A 1.85E7440417 Beryllium 2.54E-08 2.54E-08 1.44E-08 3.61E-09 2.54E-08 5.83E-08 N/A 2.54E-08 2.54E-08 N/A 2.54E7440439 Cadmium 5.16E-07 5.16E-07 7.13E-08 1.41E-06 5.16E-07 6.13E-08 N/A 5.16E-07 5.16E-07 N/A 5.16E

Total Chrome 7.90E-06 7.90E-06 3.48E-06 2.12E-06 7.90E-06 1.81E-05 N/A 7.90E-06 7.90E-06 N/A 7.90E

16065831 Chromium III 5.52E-06 5.52E-06 2.43E-06 1.48E-06 5.52E-06 1.27E-05 N/A 5.52E-06 5.52E-06 N/A 5.52E18540299 Chromium (VI) 2.38E-06 2.38E-06 1.05E-06 6.38E-07 2.38E-06 5.45E-06 N/A 2.38E-06 2.38E-06 N/A 2.38E7440484 Cobalt 2.57E-07 2.57E-07 5.67E-08 3.67E-07 2.57E-07 3.48E-07 N/A 2.57E-07 2.57E-07 N/A 2.57E7439921 Lead 1.85E-06 1.85E-06 3.36E-06 1.29E-06 1.85E-06 9.10E-07 N/A 1.85E-06 1.85E-06 N/A 1.85E7439965 Manganese 1.21E-05 1.21E-05 3.06E-06 2.75E-06 1.21E-05 3.04E-05 N/A 1.21E-05 1.21E-05 N/A 1.21E7440020 Nickel 3.91E-06 3.91E-06 4.38E-06 3.45E-06 3.91E-06 3.89E-06 N/A 3.91E-06 3.91E-06 N/A 3.91E253 

Selenium & Compounds 1.23E-06 1.23E-06 1.42E-06 1.14E-07 1.23E-06 2.14E-06 N/A 1.23E-06 1.23E-06 N/A 1.23E

Total Mercury (Hg) 1.05E-07 1.05E-07 8.68E-08 1.21E-07 1.05E-07 1.07E-07 N/A 1.05E-07 1.05E-07 N/A 1.05E

200 

Elemental Gaseous Hg 8.40E-08 8.40E-08 6.94E-08 9.68E-08 8.40E-08 8.56E-08 N/A 8.40E-08 8.40E-08 N/A 8.40E

201 

Gaseous Divalent Hg 1.05E-08 1.05E-08 8.68E-09 1.21E-08 1.05E-08 1.07E-08 N/A 1.05E-08 1.05E-08 N/A 1.05E

202 

Particulate Divalent Hg 1.05E-08 1.05E-08 8.68E-09 1.21E-08 1.05E-08 1.07E-08 N/A 1.05E-08 1.05E-08 N/A 1.05E

- Blue highlighted values are original information request test results, all other values derived based on average of test results. 

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (equal to estimated actual emissions) are provided above, actual and a

- Chromium (VI) mass fraction = 0.301. - The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202). 
12 

2. Polychlorinated Biphenyls, Polycyclic Aromatic Hydrocarbons, and Dioxins/Furans. 

a. Potline Stack, Potline Roof Vent, Anode Bake Furnace and Paste Plant 

Emission factors in units of pounds per ton aluminum produced (lb/ton Al) and pounds per ton of green 

anode (lb/ton anode) for speciated PCB, PAH, and D/F were developed using available performance test 

data. Table 9 details the facilities for which performance test data were available and summarizes the

emission factors developed for this effort. Potroom stack and roof vent test data were available for 2

facilities (Noranda and Massena East). 

Noranda utilizes prebake type reduction cells. Test results from Noranda potrooms were applied to all 

other facilities that utilize prebake type reduction cells. Two test results were available for potline 

stacks, and two test results were available for potline roof vents. The average of these two respective test 

sets was utilized as the emission factor. 

Massena East utilizes Soderberg type reduction cells. Test results from Massena East potrooms were 

applied to the other Soderberg facility (i.e., Columbia Falls). Two test results were available for potline 

stacks, and two test results were available for potline roof vents. The average of these two respective test 

sets was utilized as the emission factor. 

Test results for anode bake furnaces and paste plants were only available from 1 facility (Noranda). Test 

results from the Noranda bake furnace and paste plant were applied to all other facilities, as applicable. 

Emission rates in units of tons pollutant per year (ton/yr) on an individual emission release point basis 

were developed by multiplying the emission factor (lb/ton anode or lb/ton Al, as applicable) of a 

pollutant by the associated facility’s aluminum or anode production capacity, as applicable, and then 

dividing by the number of emission points at the facility, as shown: 

/			r
	1	1 2345	647783953

:;9< = = 	>
 27?	647783953345	\969\A3:= × B
1
C	 2345	\969\A3::;9< = ×

																																																																															B*		 2 K	345

-	7?= ÷ ]					1	 

Emission rates are then applied to each emission point at a facility. Appendix A contains the emission

rates developed from these factors. 
Table 9: Organic Emission Factors 

CAS Pollutant Noranda Test Data 

Potline Stack Test Results Potline Roof Vent Test Results Anode 

Bake 

Furnace 

Potroom 2 

duct 161 Duct Average Roof #2 Roof #3 Average 

(lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton anode) 

Polychlorinated Biphenyls 70362504 3,4,4',5-TCB (PCB-81) 1.47E-10 1.87E-10 1.67E-10 4.88E-09 2.80E-09 3.84E-09 6.22E-11 432598133 3,3',4,4'-TCB (PCB-77) 9.25E-10 4.25E-10 6.75E-10 3.08E-08 1.13E-08 2.10E-08 1.52E-10 465510443 2',3,4,4',5-PeCB (PCB-123) 1.52E-10 1.35E-10 1.44E-10 6.10E-09 6.26E-09 6.18E-09 3.73E-11 231508006 2,3',4,4',5-PeCB (PCB-118) 1.37E-08 2.88E-09 8.31E-09 5.04E-07 3.58E-08 2.70E-07 9.56E-10 274472370 2,3,4,4',5-PeCB (PCB-114) 6.41E-10 1.38E-10 3.89E-10 1.61E-08 3.17E-09 9.65E-09 3.58E-11 232598144 2,3,3',4,4'-PeCB (PCB-105) 4.72E-09 1.23E-09 2.98E-09 1.48E-07 6.63E-09 7.72E-08 4.06E-10 257465288 3,3',4,4',5-PeCB (PCB-126) 1.54E-10 1.45E-10 1.50E-10 5.72E-09 3.28E-09 4.50E-09 3.64E-11 52663726 2,3',4,4',5,5'-HxCB (PCB-167) 8.55E-10 1.68E-10 5.12E-10 1.79E-08 2.04E-09 9.99E-09 4.47E-11 38380084 2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) 1.24E-09 2.06E-10 7.25E-10 5.11E-08 2.48E-09 2.68E-08 4.66E-11 32774166 3,3',4,4',5,5'-HxCB (PCB-169) 9.77E-11 1.65E-10 1.31E-10 2.42E-09 1.85E-09 2.14E-09 4.05E-11 39635319 2,3,3',4,4',5,5'-HpCB (PCB-189) 2.12E-10 1.59E-10 1.85E-10 7.43E-09 2.25E-09 4.84E-09 3.37E-11 Polycyclic Aromatic Hydrocarbons 91203 Naphthalene 8.07E-05 2.57E-04 1.69E-04 2.62E-03 1.35E-03 1.98E-03 5.18E-03 91576 2-Methylnaphthalene 1.35E-06 2.52E-06 1.93E-06 2.35E-04 1.40E-04 1.88E-04 7.46E-04 683329 Acenaphthene 1.16E-06 4.04E-06 2.60E-06 1.84E-04 2.23E-04 2.04E-04 3.29E-05 2208968 Acenaphthylene 2.17E-07 7.01E-07 4.59E-07 6.71E-06 7.27E-06 6.99E-06 2.32E-04 486737 Fluorene 3.97E-06 2.99E-06 3.48E-06 1.26E-04 5.26E-05 8.92E-05 1.12E-04 385018 Phenanthrene 5.06E-06 1.52E-05 1.01E-05 1.84E-04 2.22E-04 2.03E-04 3.28E-03 9120127 Anthracene 5.21E-07 2.43E-06 1.48E-06 1.41E-05 2.85E-05 2.13E-05 2.81E-05 7206440 Fluoranthene 2.79E-06 3.07E-06 2.93E-06 1.70E-04 2.14E-04 1.92E-04 4.67E-03 6129000 Pyrene 1.66E-06 1.48E-06 1.57E-06 3.44E-05 7.59E-05 5.52E-05 3.97E-06 356553 Benz[a]Anthracene 4.35E-07 2.36E-07 3.36E-07 1.20E-05 3.54E-06 7.77E-06 2.98E-06 4218019 Chrysene 7.06E-07 4.75E-07 5.90E-07 7.46E-05 1.33E-05 4.40E-05 3.83E-04 6205992 Benzo[b]Fluoranthene 8.26E-07 4.37E-07 6.31E-07 6.01E-05 8.53E-06 3.43E-05 2.94E-04 207089 Benzo[k]Fluoranthene 3.04E-07 2.21E-07 2.63E-07 1.21E-05 3.17E-06 7.65E-06 1.04E-05 5
Table 9: Organic Emission Factors 

CAS Pollutant Noranda Test Data 

Potline Stack Test Results Potline Roof Vent Test Results Anode 

Bake 

Furnace 

Potroom 2 

duct 161 Duct Average Roof #2 Roof #3 Average 

(lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton Al) (lb/ton anode) 

192972 Benzo[e]Pyrene 6.90E-07 4.15E-07 5.53E-07 2.32E-05 4.50E-06 1.39E-05 1.54E-05 850328 Benzo[a]Pyrene 3.69E-07 1.45E-07 2.57E-07 2.48E-06 2.11E-06 2.30E-06 7.13E-07 5198550 Perylene 1.59E-07 1.27E-07 1.43E-07 2.07E-06 1.35E-06 1.71E-06 2.28E-07 193395 Indeno[1,2,3-c,d]Pyrene 3.25E-07 2.98E-07 3.11E-07 6.94E-06 3.40E-06 5.17E-06 3.18E-06 53703 Dibenzo[a,h]Anthracene 1.69E-07 3.18E-07 2.44E-07 5.52E-06 3.48E-06 4.50E-06 2.33E-06 6191242 Benzo[g,h,i,]Perylene 5.00E-07 2.99E-07 3.99E-07 9.11E-06 5.21E-06 7.16E-06 1.18E-06 Dioxins and Furans 1746016 2,3,7,8-Tetrachlorodibenzo-p-Dioxin 1.96E-11 5.44E-11 3.70E-11 7.33E-10 6.73E-10 7.03E-10 2.04E-11 540321764 1,2,3,7,8-Pentachlorodibenzo-p-Dioxin 2.14E-11 5.52E-11 3.83E-11 5.35E-10 6.60E-10 5.98E-10 1.56E-11 439227286 1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin 1.93E-12 5.36E-12 3.64E-12 6.67E-11 5.20E-11 5.94E-11 7.65E-13 357653857 1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin 2.44E-12 3.80E-12 3.12E-12 1.64E-10 7.32E-11 1.19E-10 6.43E-13 519408743 1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin 2.08E-12 9.66E-12 5.87E-12 1.44E-10 8.33E-11 1.14E-10 8.54E-13 335822469 1,2,3,4,6,7,8-Heptachlorodibenzodioxin 1.43E-12 1.13E-12 1.28E-12 6.19E-11 4.95E-11 5.57E-11 7.62E-13 651207319 2,3,7,8-Tetrachlorodibenzofuran 1.48E-11 1.52E-11 1.50E-11 2.23E-10 1.14E-10 1.68E-10 3.36E-12 357117416 1,2,3,7,8-Pentachlorodibenzofuran 1.82E-12 3.57E-12 2.70E-12 8.50E-11 4.68E-11 6.59E-11 3.99E-13 57117314 2,3,4,7,8-Pentachlorodibenzofuran 1.07E-11 1.16E-11 1.12E-11 2.50E-10 1.96E-10 2.23E-10 3.03E-12 670648269 1,2,3,4,7,8-Hexachlorodibenzofuran 1.86E-12 6.85E-12 4.36E-12 7.86E-11 6.78E-11 7.32E-11 8.06E-13 357117449 1,2,3,6,7,8-Hexachlorodibenzofuran 2.41E-12 3.57E-12 2.99E-12 1.11E-10 7.57E-11 9.32E-11 8.10E-13 372918219 1,2,3,7,8,9-Hexachlorodibenzofuran 1.56E-12 5.47E-12 3.52E-12 8.09E-11 1.18E-10 9.96E-11 1.04E-12 360851345 2,3,4,6,7,8-Hexachlorodibenzofuran 3.01E-12 4.68E-12 3.85E-12 9.65E-11 1.14E-10 1.05E-10 2.59E-12 467562394 1,2,3,4,6,7,8-Heptachlorodibenzofuran 3.25E-13 1.44E-12 8.80E-13 2.85E-11 3.98E-11 3.42E-11 3.57E-13 255673897 1,2,3,4,7,8,9-Heptachlorodibenzofuran 2.14E-13 5.66E-13 3.90E-13 2.07E-11 9.68E-12 1.52E-11 1.23E-13 3
15 

b. Pitch Storage Tanks 

Emissions for speciated PAH were developed using available PAH performance test data from Massena 

East potroom vents in conjunction with a series of engineering assumptions and unit conversions. The 

first step in determining the pitch storage tank PAH emissions was to estimate the volume of gas 

displaced annually from pitch tanks (i.e., the working losses of the tanks). As a general approximation, it 

was assumed that the volume of pitch added to the tank equals the volume of gas displaced as the tank is 

filled, as shown: 

^	1
_	`
		 	1h	

C # = a	B
1
C 	aC # × 0.57 	`	
_	a #

× 0.22  	1h

	`	
_# × 2000	]	1h	1h # × b 178c 	1h]	1h #

Where: 

 Assumed cubic feet (cu ft) pitch added to tank is equal to cu ft gas displaced from tank. 

 Green anode produced per ton of aluminum for bake furnace and paste plant = 0.57 (ton 

green anode/ton aluminum), (the industry average value provided by The Aluminum 

Association). 

 Green anode paste consists of 22% (0.22) pitch and 78% petroleum coke.1

 Density of pitch2 = 78 (lb/cu ft); based on pitch specific gravity of 1.25. 

The next step is to approximate the hydrocarbon content of the displaced gas (i.e., what portion of the 

displaced gas contains volatile hydrocarbon) and then speciate that volatile portion of the displaced gas 

using PAH mass fractions. PAH mass fractions were developed from Massena East potline roof vent 

performance test data, as shown in Table 10. Speciated pitch storage tank PAH emissions are 

approximated as follows: 

ad					 

C # = _	1
_	`
		 	1h	`
	C # × 0.0034 		hC_
]		1h	`
	 # ×

b

1

359c ] ∙ 	hC_
]		hC_
] # × f
			
	g 

]  ⁄

]  ⁄

( × 
	i`h	  ]

] ∙ # ×	

× 1
	*		 b273

423c × b 12000c ] #

Where: 

 0.0034 = approximated percent volume of hydrocarbon in pitch gas based on calculated 

vapor pressure of oxidized asphalt at 300 degrees Fahrenheit (assumed to approximate 

pitch at that temperature, based on available data) of 0.0034 atmospheres (0.34 percent). 

 1 lb mole of ideal gas at standard temperature and pressure occupies 359 cu ft. 

 Mass fractions shown in Table 10. Assumed that speciation profile of Massena East roof 

vent PAH performance test report is similar to the speciation of the volatile portion of the 

displaced pitch gas. 

 Molecular weight of each PAH constituent is used to speciate total PAH. 

 Temperature conversion accounts for gas temperature of 150°C 
16 

Table 10: Summary of Pitch Storage Tank Vapor Emissions a

CAS Pollutant 

Molecular 

Weight 

Massena East 

Potline Vent 

Emissions 

Rate 

Estimated 

Mole Fraction 

in Organic 

Vapors (lb/lb.mol) (lb/ton Al) 

91203 Naphthalene 128.17 1.96E-02 1.40E-02 

91576 2-Methylnaphthalene 142.20 1.34E-02 9.60E-03 

83329 Acenaphthene 154.21 2.82E-02 2.02E-02 

208968 Acenaphthylene 152.19 2.25E-03 1.61E-03 

86737 Fluorene 166.22 5.19E-03 3.70E-03 

85018 Phenanthrene 178.23 4.00E-02 2.86E-02 

120127 Anthracene 178.23 4.48E-03 3.20E-03 

206440 Fluoranthene 202.26 5.82E-02 4.16E-02 

129000 Pyrene 202.25 1.39E-02 9.93E-03 

56553 Benz[a]anthracene 228.29 7.14E-03 5.10E-03 

218019 Chrysene 228.28 2.11E-02 1.51E-02 

205992 Benzo[b]fluoranthene 252.31 2.59E-02 1.85E-02 

207089 Benzo[k]fluoranthene 252.31 9.88E-03 7.06E-03 

192972 Benzo[e]pyrene 252.31 1.40E-02 9.98E-03 

50328 Benzo[a]pyrene 252.31 3.58E-03 2.56E-03 

198550 Perylene 252.31 8.46E-04 6.04E-04 

193395 Indeno[1,2,3-c,d]Pyrene 276.33 4.38E-03 3.13E-03 

53703 Dibenzo[a,h]anthracene 278.35 1.33E-03 9.49E-04 

191242 Benzo[g,h,i,]Perylene 276.33 5.39E-03 3.85E-03 

a

 Developed from Massena East potline vent emissions test data, based on emission rate of 1.95 E-05 lbmoles hydrocarbon/ton Al produced. 

Appendix A contains the emission rates developed for pitch storage tanks. 

3. Hydrogen Fluoride and Carbonyl Sulfide 

a. Potline Stack, Potline Roof Vent and Anode Bake Furnace 

COS emission rates were taken directly from the 2011 modeling effort (see docket item EPA-HQ-OAR2011-0797-0146) and are summarized in Appendix A. That is, since we have not obtained any new COS 

emissions data since the 2011 proposal and since the facilities’ production capacities have not changed 

since the 2011 proposal, the 2011 emission factors form the basis for the best estimate of the emission 

rates in 2013, which are identical to those used in the 2011 proposal. 

Emission factors in units of pounds per ton capacity (aluminum or anode) (lb/ton) for HF were based on

available performance test data. When performance test data were not available, actual HF emission 

factors were derived based on total fluoride (TF) limits. In these cases, the TF potroom limit was 

apportioned to potline stacks (10%) and potline roof vents (90%) consistent with facilities for which 

data were available. Then, the allowable HF emission factors (derived from TF) were estimated to be 

50% of the allowable TF limit, and the actual HF emission factors were estimated to be 2/3 of the 
17 

allowable HF emission factor. Table 11 identifies the facilities for which performance test data were 

available and summarizes the emission factors developed for this effort. 

Emission rates in units of ton/yr on an individual emission unit basis were developed by multiplying the 

emission factor (lb/ton capacity) of a pollutant by the associated facility’s aluminum or anode 

production capacity and then dividing by number of emission points at the facility, as shown: 

/			r
	1	1 2345	647783953

:;9< = = 	>
 27?	647783953345	\969\A3:= × B
1
C	 2345	\969\A3::;9< = ×

																																																																															B*		 2 K	345

-	7?= ÷ ]					1	 

Appendix A contains the emission rates developed from these factors. 
Table 11: Hydrogen Fluoride Emission Factors

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East Cent

of W

Potline Stack 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/t

Al

7664393 Hydrogen Fluoride 0.050 0.080 0.044 0.034 0.029 0.063 0.050 0.375 0.050 0.030 0.10 Total Fluoride 1.020 3.00Potline Roof Vent 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/ton 

Al) 

(lb/t

Al

7664393 Hydrogen Fluoride 0.460 0.660 0.440 0.308 0.760 0.570 0.780 0.342 0.500 1.030 0.90 Total Fluoride 1.020 3.00Anode Bake Furnace 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/ton 

Anode) 

(lb/t

Ano

7664393 Hydrogen Fluoride 0.067 0.067 0.067 0.067 0.067 0.001 N/A 0.067 0.067 N/A 0.06 Total Fluoride 0.200 0.200 0.200 0.200 0.200 N/A 0.200 0.200 N/A 0.20- N/A = Not applicable, no emission unit at facility. - Blue values are original information request test results, all other values derived based on total fluoride limits. - Total fluoride potroom limit was apportioned to potline stacks (10%) and potline roof vents (90%) - For Alumax (SPPD_FAC_04), a more stringent potline limit imposed by State regulations was applied.
19 

4. Discussion of Actual, Allowable and Acute Emissions

a. Actual Emissions 

Actual emission rates developed for this data set were based on facility aluminum or anode production 

capacities and available performance test data in units of lb/ton of aluminum or anode production, as 

appropriate. The resulting emission rates assume that the facilities operate at capacity. It should be noted 

that the Alcoa - Massena East production capacity was corrected to 2/3 of original production capacity

based on new information provided by the company (one of the 3 potlines was permanently shut down 

in September of 2013). Also, Columbia Falls Aluminum was corrected to 4/5 of original production 

capacity based on actual operational data since 1999. Appendix A contains the actual emission rates 

developed for this effort. 

b. Allowable Emissions 

Allowable emission rates were developed by scaling the actual emission rates. The EPA evaluated 

allowable emissions based on responses to the information request and estimated that allowable 

emissions for currently regulated HAP (i.e., PAHs and HF) were generally about 1.5 times higher than 

the actual emissions. For Columbia Falls, which has the highest potential for emissions of all the 

facilities, the EPA evaluated site-specific data and estimated that allowable emissions for the regulated 

HAP (i.e., PAHs and HF) were about 1.9 times higher than estimated actual emissions when the plant is 

operating. The current NESHAP includes no standards for COS, PCB, D/F and HAP metal emissions. 

Since there is no standard in place for these HAP and therefore no defined level of “MACT allowable” 

emissions levels, we assumed that allowable emissions for COS, PCB, D/F and HAP metal emissions 

were equal to estimated actual emissions. 

c. Acute Emissions 

To develop screening estimates of acute exposures in the absence of hourly emissions data, the EPA 

generally develops estimates of maximum hourly emissions rates by multiplying the average actual 

annual hourly emissions rates by a default factor to cover routinely variable emissions. The EPA 

chooses the factor based on process knowledge and engineering judgment reflecting, where appropriate, 

circumstances of the particular source category. The default factor reflects the findings of the Texas

study of short-term emissions variability, which showed that most peak emission events in a heavilyindustrialized were less than twice the annual average hourly emissions rate.3

For the primary aluminum reduction source category, information was available to determine processspecific factors. The processes in this source category are typically equipped with controls which will 

not allow startup of the emission source until the associated control device is operating and will 

automatically shut down the emission source if the associated controls malfunction. The potline 

processes typically operate continuously, so there are no significant spikes in emissions. The EPA 

believes emissions from the potlines are relatively consistent over time with minimal fluctuation. 

The EPA estimated that the maximum allowable emissions for potlines are about 1.5 times higher than 

the average long-term actual emissions for these sources. Therefore, the EPA also assumes that hourly 

emissions rates from potlines could occasionally increase by a factor of up to 1.5 times the average 

hourly emissions. The EPA believes this is a valid multiplier to estimate maximum acute emissions from

potlines. Paste production and anode baking processes may have specific cycles with peak emissions 

occurring for a part of that cycle. The EPA believes these peak emissions could be as high as 2 times the 

average emissions for paste plants and bake furnaces. 

A summary of the multipliers used in this data set is shown in Table 12. 
20 

Table 12: Summary of Allowable and Acute Multipliers 

 HAP Metals 

Polychlorinated 

Biphenyls 

Polycyclic 

Aromatic 

Hydrocarbons 

Dioxins and 

Furans 

Hydrogen 

Fluoride 

Carbonyl 

Sulfide 

Allowable Emissions

Potline Stack = Actual = Actual = Actual x 1.5 = Actual = Actual x 1.5 = Actual 

Potline Roof Vent = Actual = Actual = Actual x 1.5 = Actual = Actual x 1.5 N/A 

Anode Bake Furnace = Actual = Actual = Actual x 1.5 = Actual = Actual x 1.5 N/A 

Paste Plant = Actual = Actual = Actual x 1.5 = Actual N/A N/A 

Pitch Storage Tank N/A N/A = Actual x 1.5 N/A N/A N/A 

Acute Emissions

Potline Stack = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 

Potline Roof Vent = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 = Actual x 1.5 N/A 

Anode Bake Furnace = Actual x 2 = Actual x 2 = Actual x 2 = Actual x 2 = Actual x 2 N/A 

Paste Plant = Actual x 2 = Actual x 2 = Actual x 2 = Actual x 2 N/A N/A 

Pitch Storage Tank N/A N/A = Actual x 2 N/A N/A N/A

- Columbia Falls Aluminum Company is not in operation. Actual and acute emissions were modeled as zero. Allowable 

emissions were estimated at 1.9 times production based actual emission rate estimates. 

IV. Non-Category Emissions Development 

1. Secondary Aluminum Collocated Sources and Other Non-category Emissions 

A dataset representing facility-wide emissions was developed. This dataset consisted of HAP emissions 

from all processes at the primary aluminum production facilities, as well as all HAP emitted from nonprimary aluminum production processes. Three modeling files were developed for use in the risk 

review; a file with data for only primary aluminum sources, a file for only primary aluminum sources 

collocated with secondary aluminum sources, and a modeling file with other non-category emissions 

that are not primary or secondary aluminum units at major sources. 

A total of 14 major source facilities were modeled. Of the 14 major source facilities, 8 were collocated 

with secondary aluminum facilities. Of the 14 major source facilities, 10 had non-category emissions 

that were not primary aluminum units. The facility-wide emissions dataset was created by adding nonprimary aluminum source category emission points to the primary aluminum source category dataset. 

The modeling inputs for the secondary aluminum operations collocated at primary aluminum 

production facilities are exactly the same as the inputs used in the 2014 risk assessment for the 

secondary aluminum production source category.4 

Other non-category emissions data that were not submitted for the section 114 request or extracted from 

the primary aluminum proposal file (e.g., boiler emissions) were extracted from the 2008 National 

Emissions Inventory (NEI). 

V. Quality Control Checks and Resulting Changes 

Data reported in the ICRs were checked in several ways. Data quality checks that were performed and 

changes that were made are briefly summarized below: 

Source latitudes and longitudes reported by facilities were checked in Google EarthTM to 

verify accuracy and were corrected as needed. Correct format for latitude and longitude was 

reviewed and corrected as needed. 
21 

The total number of emission points (e.g., number of potlines) were checked in Google 

EarthTM and with facility contacts to verify accuracy and were corrected as needed. 

Reviewed, identified and corrected missing stack parameters (diameter, flow rate, 

temperature). 

Reviewed and corrected pollutant names and pollutant codes. 

Reviewed and corrected exhaust temperatures, stack heights, stack diameters, and exhaust 

flow rates that appeared to be out of standard industry range. 

Verified that actual emissions were less than or equal to allowable and acute emissions. 

Reviewed test reports for adherence to QA requirements (e.g., sample size, sample 

temperature, leak check) and discarded questionable results. 

Verified all test results with test reports to ensure accurate data was used for emissions 

estimates. 

Verified that multiple emission points of a given type (i.e., potline vents, bake furnace 

stacks) have identical emission rates for a given pollutant. 

Reviewed calculation methodology and verified that emission factors and emission rates 

calculated were accurate. 

The quality control efforts employed for this project resulted in a more accurate 2013 data set. A few

facilities had the number of emission release points and/or the actual location of the release points 

changed in the modeling file. In all cases, these changes were minor and did not significantly change 

the modeling inputs or outputs. 

VI. References 

1. Industry average values provided by The Aluminum Association 

2. Suriyapraphadilok, U., et al. 

(http://www.acs.omnibooksonline.com/data/papers/2004_D013.pdf) 

3. See http://www.tceq.state.tx.us/compliance/field_ops/eer/index.html or the docket to access the 

source of these data. 

4. NESHAP for Secondary Aluminum Production Amendments Based on the Risk and 

Technology Review. Docket ID No. EPA-HQ-OAR-2010-0544. 
1 

Appendix A – 2013 Modeled Emission Rates 
Table A-1: 2013 Potline Stack HAP Actual Metal Emission Rates (per release point) 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA) - Sebree Ormet Century of KY Intalco Massena East Centu

of W

3 Release 

Points 

5 Release 

Points 

4 Release 

Points 

4 Release 

Points 

4 Release 

Points 

6 Release 

Points 

6 Release 

Points 

2 Release 

Points 

18 

Release 

Points 

2 Release 

Points 

1 Rele

Poin

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

187,4

ton A

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/y

7440360 Antimony 1.17E-03 1.44E-03 1.07E-03 1.07E-03 1.86E-03 2.90E-04 2.65E-03 3.89E-03 2.85E-04 1.11E-03 4.57E7440382 Arsenic 5.04E-04 6.25E-04 4.25E-03 9.31E-04 8.04E-04 5.98E-04 8.37E-03 1.31E-02 0.00E+00 6.87E-03 3.22E7440417 Beryllium 1.03E-03 1.28E-03 2.26E-05 1.60E-05 1.65E-03 1.85E-05 1.04E-04 1.91E-02 5.74E-06 2.78E-04 4.06E7440439 Cadmium 4.35E-04 5.39E-04 1.12E-04 1.64E-03 6.93E-04 2.78E-05 0.00E+00 4.29E-03 5.38E-04 0.00E+00 0.00E+16065831 Chromium (III) 6.46E-03 8.01E-03 7.04E-03 2.13E-03 1.03E-02 1.98E-03 4.30E-03 2.73E-02 8.26E-04 1.87E-02 2.54E18540299 Chromium (VI) 8.30E-04 1.03E-03 9.04E-04 4.79E-04 1.32E-03 2.54E-04 5.52E-04 3.51E-03 1.06E-04 8.52E-04 3.26E7440484 Cobalt 7.11E-04 8.81E-04 1.28E-04 5.03E-04 1.13E-03 3.49E-05 1.48E-03 4.19E-03 2.20E-04 8.29E-04 2.79E7439921 Lead 1.49E-02 1.85E-02 3.08E-03 5.74E-03 2.38E-02 1.37E-04 4.69E-02 6.47E-02 7.11E-03 7.66E-03 5.85E7439965 Manganese 2.10E-02 2.60E-02 5.43E-03 2.55E-03 3.35E-02 8.55E-04 9.65E-02 3.59E-02 5.73E-03 1.47E-02 8.24E7440020 Nickel 6.88E-03 8.52E-03 1.66E-02 3.43E-03 1.10E-02 1.77E-03 1.84E-02 1.32E-01 1.71E-02 3.64E-02 7.07E253 

Selenium & Compounds 3.04E-03 3.76E-03 2.25E-03 1.90E-03 4.85E-03 2.85E-04 1.19E-02 3.18E-03 5.71E-04 2.78E-03 1.19E

Total Mercury (Hg) 1.71E-04 2.11E-04 1.59E-04 4.15E-04 2.72E-04 2.43E-05 2.12E-05 1.53E-03 1.66E-05 7.57E-05 6.69E

200 

Elemental Gaseous Hg 1.37E-04 1.69E-04 1.27E-04 3.32E-04 2.18E-04 1.94E-05 1.70E-05 1.22E-03 1.33E-05 6.06E-05 5.35E

201 

Gaseous Divalent Hg 1.71E-05 2.11E-05 1.59E-05 4.15E-05 2.72E-05 2.43E-06 2.12E-06 1.53E-04 1.66E-06 7.57E-06 6.69E

202 

Particulate Divalent Hg 1.71E-05 2.11E-05 1.59E-05 4.15E-05 2.72E-05 2.43E-06 2.12E-06 1.53E-04 1.66E-06 7.57E-06 6.69E

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (equal to estimated actual emissions) are provided above, actual and a- The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202). 
Table A-2: 2013 Potline Roof Vent HAP Actual Metal Emission Rates (per release poin

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA)- Sebree Ormet Century of KY Intalco Massena East Centu

of W

11 

Release 

Points 

10 

Release 

Points 

8 Release 

Points 

4 Release 

Points 

3 Release 

Points 

6 Release 

Points 

24 

Release 

Points 

8 Release 

Points 

6 Release 

Points 

4 Release 

Points 

1 Rele

Poin

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

187,4

ton A

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/y

7440360 Antimony 1.28E-02 3.65E-02 2.03E-03 2.38E-02 1.00E-01 6.97E-03 7.14E-02 1.81E-03 1.04E-02 2.63E-03 1.85E7440382 Arsenic 2.89E-02 6.56E-02 8.16E-02 1.76E-01 2.25E-01 2.11E-02 2.75E-02 3.75E-03 0.00E+00 8.32E-02 4.24E7440417 Beryllium 7.20E-04 2.05E-03 1.93E-04 2.15E-04 5.62E-03 5.49E-03 4.63E-04 5.14E-03 2.06E-04 6.58E-04 1.04E7440439 Cadmium 1.11E-03 2.53E-03 1.21E-03 7.74E-03 8.68E-03 2.99E-03 0.00E+00 1.58E-03 5.61E-02 2.38E-03 0.00E+16065831 Chromium (III) 1.89E-02 5.35E-02 2.67E-03 3.41E-02 1.47E-01 1.88E-02 1.02E-02 3.66E-02 3.63E-02 1.51E-01 2.71E18540299 Chromium (VI) 1.18E-03 3.35E-03 1.67E-04 3.90E-03 9.21E-03 1.18E-03 6.39E-04 2.29E-03 2.28E-03 2.34E-03 1.70E7440484 Cobalt 4.26E-03 1.21E-02 6.06E-04 3.39E-03 3.32E-02 7.04E-04 1.83E-02 8.81E-03 1.18E-03 9.32E-03 6.13E7439921 Lead 4.03E-02 1.15E-01 1.23E-02 2.28E-02 3.15E-01 6.32E-03 2.15E-01 2.54E-02 2.26E-02 4.18E-02 5.80E7439965 Manganese 2.54E-02 7.21E-02 6.46E-03 4.37E-02 1.98E-01 6.84E-03 1.13E-02 1.26E-01 2.24E-01 7.86E-02 3.66E7440020 Nickel 5.18E-02 1.18E-01 6.26E-02 2.72E-01 4.04E-01 1.82E-01 7.22E-02 3.96E-01 6.86E-02 5.55E-01 1.11E+253 

Selenium & Compounds 1.06E-02 3.02E-02 2.11E-03 3.15E-03 8.28E-02 2.99E-03 5.79E-02 1.38E-03 2.08E-02 6.58E-03 1.53E

Total Mercury (Hg) 2.10E-04 5.97E-04 1.21E-04 1.42E-03 1.64E-03 2.36E-04 5.08E-06 1.48E-03 1.38E-03 1.62E-04 3.03E

200 

Elemental Gaseous Hg 1.68E-04 4.78E-04 9.68E-05 1.14E-03 1.31E-03 1.89E-04 4.06E-06 1.18E-03 1.10E-03 1.30E-04 2.42E

201 Gaseous Divalent Hg 2.10E-05 5.97E-05 1.21E-05 1.42E-04 1.64E-04 2.36E-05 5.08E-07 1.48E-04 1.38E-04 1.62E-05 3.03E202 

Particulate Divalent Hg 2.10E-05 5.97E-05 1.21E-05 1.42E-04 1.64E-04 2.36E-05 5.08E-07 1.48E-04 1.38E-04 1.62E-05 3.03E

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (equal to estimated actual emissions) are provided above, actual and a- The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202). 
Table A-3: 2013 Anode Bake Furnace HAP Metal Emission Rates (per release point) 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA) - Sebree Ormet Century of KY Intalco Massena East Centur

of WV 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

3 Release 

Points 

1 Release 

Point 

0 

Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Relea

Point 

81,681 

ton anode 

168,663 

ton anode 

115,596 

ton anode 

140,733 

ton anode 

173,679 

ton anode 

123,177 

ton anode 

0 ton 

anode 

153,330 

ton anode 

174,648 

ton anode 

0 ton 

anode 

106,81

ton anod

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr

7440360 Antimony 1.22E-04 2.51E-04 2.74E-04 1.10E-04 8.63E-05 1.63E-04 N/A 2.29E-04 2.60E-04 N/A 1.59E-07440382 Arsenic 2.15E-04 4.44E-04 5.49E-04 1.88E-04 1.52E-04 2.24E-04 N/A 4.04E-04 4.60E-04 N/A 2.81E-07440417 Beryllium 3.56E-06 7.34E-06 5.51E-06 2.45E-06 2.52E-06 8.07E-06 N/A 6.67E-06 7.60E-06 N/A 4.65E-07440439 Cadmium 1.24E-04 2.55E-04 2.74E-05 5.31E-04 8.77E-05 6.59E-05 N/A 2.32E-04 2.65E-04 N/A 1.62E-016065831 Chromium III 2.93E-04 6.04E-04 6.07E-04 5.13E-04 2.07E-04 2.28E-04 N/A 5.49E-04 6.26E-04 N/A 3.83E-018540299 Chromium (VI) 4.99E-04 1.03E-03 1.04E-03 8.76E-04 3.54E-04 3.88E-04 N/A 9.38E-04 1.07E-03 N/A 6.53E-07440484 Cobalt 1.12E-04 2.31E-04 3.31E-04 1.43E-04 7.95E-05 2.93E-05 N/A 2.10E-04 2.40E-04 N/A 1.47E-07439921 Lead 3.78E-04 7.80E-04 2.74E-04 1.18E-03 2.68E-04 3.81E-04 N/A 7.09E-04 8.08E-04 N/A 4.94E-07439965 Manganese 1.40E-03 2.89E-03 1.27E-03 5.25E-03 9.93E-04 3.99E-04 N/A 2.63E-03 3.00E-03 N/A 1.83E-07440020 Nickel 7.83E-04 1.62E-03 2.04E-03 1.31E-03 5.55E-04 2.25E-04 N/A 1.47E-03 1.67E-03 N/A 1.02E-0253 

Selenium & Compounds 1.23E-03 2.54E-03 5.49E-04 5.39E-03 8.72E-04 2.60E-04 N/A 2.31E-03 2.63E-03 N/A 1.61E-0

Total Mercury (Hg) 6.06E-04 1.25E-03 1.96E-03 7.38E-04 4.30E-04 7.96E-06 N/A 1.14E-03 1.30E-03 N/A 7.93E-0

200 

Elemental Gaseous Hg 4.85E-04 1.00E-03 1.57E-03 5.90E-04 3.44E-04 6.37E-06 N/A 9.12E-04 1.04E-03 N/A 6.34E-0

201 Gaseous Divalent Hg 6.06E-05 1.25E-04 1.96E-04 7.38E-05 4.30E-05 7.96E-07 N/A 1.14E-04 1.30E-04 N/A 7.93E-0202 

Particulate Divalent Hg 6.06E-05 1.25E-04 1.96E-04 7.38E-05 4.30E-05 7.96E-07 N/A 1.14E-04 1.30E-04 N/A 7.93E-0

- N/A - no applicable emission unit at facility. - The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202).
Table A-4: 2013 Paste Plant HAP Metal Emission Rates (per release point) 

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century (RTA) - Sebree Ormet Century of KY Intalco Massena East Centur

of WV 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

0 

Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Relea

Point 

81,681 

ton anode 

168,663 

ton anode 

115,596 

ton anode 

140,733 

ton anode 

173,679 

ton anode 

123,177 

ton anode 

0 ton 

anode 

153,330 

ton anode 

174,648 

ton anode 

0 ton 

anode 

106,81

ton ano

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr

7440360 Antimony 4.10E-05 8.47E-05 3.72E-05 1.76E-05 8.72E-05 1.31E-04 N/A 7.70E-05 8.77E-05 N/A 5.37E-07440382 Arsenic 7.55E-05 1.56E-04 8.23E-05 1.33E-05 1.60E-04 2.42E-04 N/A 1.42E-04 1.61E-04 N/A 9.87E-07440417 Beryllium 1.04E-06 2.14E-06 8.29E-07 2.54E-07 2.21E-06 3.59E-06 N/A 1.95E-06 2.22E-06 N/A 1.36E-07440439 Cadmium 2.11E-05 4.35E-05 4.12E-06 9.95E-05 4.48E-05 3.78E-06 N/A 3.95E-05 4.50E-05 N/A 2.75E-016065831 Chromium III 2.25E-04 4.66E-04 1.40E-04 1.04E-04 4.79E-04 7.79E-04 N/A 4.23E-04 4.82E-04 N/A 2.95E-018540299 Chromium (VI) 9.71E-05 2.01E-04 6.05E-05 4.49E-05 2.07E-04 3.36E-04 N/A 1.82E-04 2.08E-04 N/A 1.27E-07440484 Cobalt 1.05E-05 2.17E-05 3.28E-06 2.58E-05 2.23E-05 2.14E-05 N/A 1.97E-05 2.25E-05 N/A 1.37E-07439921 Lead 7.57E-05 1.56E-04 1.94E-04 9.08E-05 1.61E-04 5.60E-05 N/A 1.42E-04 1.62E-04 N/A 9.90E-07439965 Manganese 4.93E-04 1.02E-03 1.77E-04 1.94E-04 1.05E-03 1.87E-03 N/A 9.25E-04 1.05E-03 N/A 6.45E-07440020 Nickel 1.60E-04 3.29E-04 2.53E-04 2.43E-04 3.39E-04 2.40E-04 N/A 2.99E-04 3.41E-04 N/A 2.09E-0253 

Selenium & Compounds 5.01E-05 1.03E-04 8.23E-05 8.01E-06 1.06E-04 1.32E-04 N/A 9.40E-05 1.07E-04 N/A 6.55E-0

Total Mercury (Hg) 4.28E-06 8.84E-06 5.02E-06 8.50E-06 9.10E-06 6.58E-06 N/A 8.04E-06 9.15E-06 N/A 5.60E-0

200 

Elemental Gaseous Hg 3.42E-06 7.07E-06 4.02E-06 6.80E-06 7.28E-06 5.26E-06 N/A 6.43E-06 7.32E-06 N/A 4.48E-0

201 

Gaseous Divalent Hg 4.28E-07 8.84E-07 5.02E-07 8.50E-07 9.10E-07 6.58E-07 N/A 8.04E-07 9.15E-07 N/A 5.60E-0

202 

Particulate Divalent Hg 4.28E-07 8.84E-07 5.02E-07 8.50E-07 9.10E-07 6.58E-07 N/A 8.04E-07 9.15E-07 N/A 5.60E-0

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (equal to estimated actual emissions) are provided above, actual and a- The emission factors for total mercury (7439976) are multiplied by the default EPA mercury speciation factors of 0.80 for elemental gaseous mercury (200), 0

and 0.10 for particulate divalent mercury (202). 
Table A-5: 2013 Potline Stack Organic Emission Rates (per release point)

CAS Pollutant Massena 

West 

Warrick Wenatchee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East C

o

3 Release 

Points 

5 Release 

Points 

4 Release 

Points 

4 Release 

Points 

4 Release 

Points 

6 Release 

Points 

6 Release 

Points 

2 Release 

Points 

18 

Release 

Points 

2 Release 

Points 

1 R

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

1

t

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (t

Polychlorinated Biphenyls 70362504 3,4,4',5-TCB (PCB-81) 3.99E-09 4.95E-09 4.24E-09 5.16E-09 6.37E-09 3.01E-09 4.07E-09 1.12E-08 1.42E-09 4.04E-08 1.32598133 3,3',4,4'-TCB (PCB-77) 1.61E-08 2.00E-08 1.71E-08 2.08E-08 2.57E-08 1.22E-08 1.64E-08 4.54E-08 5.74E-09 3.47E-07 6.65510443 2',3,4,4',5-PeCB (PCB-123) 3.43E-09 4.25E-09 3.64E-09 4.43E-09 5.47E-09 2.59E-09 3.50E-09 9.66E-09 1.22E-09 3.15E-08 1.31508006 2,3',4,4',5-PeCB (PCB-118) 1.98E-07 2.46E-07 2.11E-07 2.56E-07 3.16E-07 1.50E-07 2.02E-07 5.59E-07 7.07E-08 1.30E-06 7.74472370 2,3,4,4',5-PeCB (PCB-114) 9.30E-09 1.15E-08 9.87E-09 1.20E-08 1.48E-08 7.01E-09 9.48E-09 2.62E-08 3.31E-09 4.05E-08 3.32598144 2,3,3',4,4'-PeCB (PCB-105) 7.11E-08 8.81E-08 7.55E-08 9.19E-08 1.13E-07 5.36E-08 7.25E-08 2.00E-07 2.53E-08 5.10E-07 2.57465288 3,3',4,4',5-PeCB (PCB-126) 3.57E-09 4.43E-09 3.79E-09 4.62E-09 5.70E-09 2.69E-09 3.64E-09 1.01E-08 1.27E-09 3.22E-08 1.52663726 

2,3',4,4',5,5'-HxCB (PCB167) 1.22E-08 1.51E-08 1.30E-08 1.58E-08 1.95E-08 9.21E-09 1.25E-08 3.44E-08 4.35E-09 3.40E-08 4.

38380084 

2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) 1.73E-08 2.14E-08 1.84E-08 2.24E-08 2.76E-08 1.31E-08 1.76E-08 4.87E-08 6.17E-09 9.07E-08 6.

32774166 

3,3',4,4',5,5'-HxCB (PCB169) 3.14E-09 3.89E-09 3.33E-09 4.05E-09 5.00E-09 2.37E-09 3.20E-09 8.83E-09 1.12E-09 4.79E-09 1.

39635319 

2,3,3',4,4',5,5'-HpCB (PCB189) 4.43E-09 5.49E-09 4.70E-09 5.72E-09 7.07E-09 3.34E-09 4.52E-09 1.25E-08 1.58E-09 5.63E-09 1.

Polycyclic Aromatic Hydrocarbons 91203 Naphthalene 4.03E-03 4.99E-03 4.27E-03 5.20E-03 6.42E-03 3.04E-03 4.10E-03 1.13E-02 1.43E-03 7.98E-01 1.91576 2-Methylnaphthalene 4.61E-05 5.72E-05 4.90E-05 5.96E-05 7.36E-05 3.48E-05 4.70E-05 1.30E-04 1.64E-05 3.33E-01 1.83329 Acenaphthene 6.21E-05 7.69E-05 6.59E-05 8.02E-05 9.90E-05 4.68E-05 6.33E-05 1.75E-04 2.21E-05 7.46E-01 2.208968 Acenaphthylene 1.10E-05 1.36E-05 1.16E-05 1.42E-05 1.75E-05 8.26E-06 1.12E-05 3.09E-05 3.91E-06 1.42E-01 4.86737 Fluorene 8.31E-05 1.03E-04 8.82E-05 1.07E-04 1.33E-04 6.27E-05 8.47E-05 2.34E-04 2.96E-05 1.51E-01 3.85018 Phenanthrene 2.42E-04 2.99E-04 2.56E-04 3.12E-04 3.85E-04 1.82E-04 2.46E-04 6.80E-04 8.61E-05 3.45E-01 9.120127 Anthracene 3.53E-05 4.37E-05 3.75E-05 4.56E-05 5.63E-05 2.66E-05 3.60E-05 9.94E-05 1.26E-05 1.22E-02 1.206440 Fluoranthene 6.99E-05 8.66E-05 7.42E-05 9.03E-05 1.11E-04 5.27E-05 7.12E-05 1.97E-04 2.49E-05 1.65E-01 2.129000 Pyrene 3.75E-05 4.64E-05 3.98E-05 4.84E-05 5.97E-05 2.82E-05 3.82E-05 1.05E-04 1.33E-05 4.56E-02 1.56553 Benz[a]Anthracene 8.02E-06 9.94E-06 8.52E-06 1.04E-05 1.28E-05 6.05E-06 8.18E-06 2.26E-05 2.86E-06 2.10E-03 3.
218019 Chrysene 1.41E-05 1.75E-05 1.50E-05 1.82E-05 2.25E-05 1.06E-05 1.44E-05 3.97E-05 5.02E-06 1.33E-02 5.205992 Benzo[b]Fluoranthene 1.51E-05 1.87E-05 1.60E-05 1.95E-05 2.40E-05 1.14E-05 1.54E-05 4.25E-05 5.37E-06 9.90E-03 5.207089 Benzo[k]Fluoranthene 6.27E-06 7.77E-06 6.66E-06 8.10E-06 1.00E-05 4.73E-06 6.39E-06 1.77E-05 2.23E-06 4.80E-03 2.192972 Benzo[e]Pyrene 1.32E-05 1.64E-05 1.40E-05 1.71E-05 2.10E-05 9.95E-06 1.35E-05 3.72E-05 4.70E-06 6.05E-03 5.50328 Benzo[a]Pyrene 6.14E-06 7.60E-06 6.51E-06 7.93E-06 9.79E-06 4.63E-06 6.25E-06 1.73E-05 2.19E-06 1.56E-03 2.198550 Perylene 3.42E-06 4.24E-06 3.63E-06 4.42E-06 5.46E-06 2.58E-06 3.49E-06 9.63E-06 1.22E-06 4.62E-04 1.193395 Indeno[1,2,3-c,d]Pyrene 7.44E-06 9.21E-06 7.89E-06 9.61E-06 1.19E-05 5.61E-06 7.58E-06 2.09E-05 2.65E-06 2.10E-03 2.53703 Dibenzo[a,h]Anthracene 5.82E-06 7.22E-06 6.18E-06 7.53E-06 9.29E-06 4.39E-06 5.94E-06 1.64E-05 2.08E-06 5.55E-04 2.191242 Benzo[g,h,i,]Perylene 9.54E-06 1.18E-05 1.01E-05 1.23E-05 1.52E-05 7.19E-06 9.72E-06 2.69E-05 3.40E-06 3.23E-03 3.Dioxins and Furans 1746016 

2,3,7,8-Tetrachlorodibenzo-pDioxin 8.84E-10 1.09E-09 9.38E-10 1.14E-09 1.41E-09 6.66E-10 9.01E-10 2.49E-09 3.15E-10 2.25E-09 3.

40321764 

1,2,3,7,8-Pentachlorodibenzop-Dioxin 9.14E-10 1.13E-09 9.70E-10 1.18E-09 1.46E-09 6.89E-10 9.32E-10 2.57E-09 3.26E-10 2.45E-09 3.

39227286 

1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin 8.70E-11 1.08E-10 9.23E-11 1.12E-10 1.39E-10 6.56E-11 8.86E-11 2.45E-10 3.10E-11 2.70E-09 3.

57653857 

1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin 7.44E-11 9.22E-11 7.90E-11 9.62E-11 1.19E-10 5.61E-11 7.59E-11 2.10E-10 2.65E-11 2.80E-09 2.

19408743 

1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin 1.40E-10 1.74E-10 1.49E-10 1.81E-10 2.24E-10 1.06E-10 1.43E-10 3.95E-10 4.99E-11 3.67E-09 5.

35822469 

1,2,3,4,6,7,8-Heptachlorodibenzodioxin 3.06E-11 3.80E-11 3.25E-11 3.96E-11 4.89E-11 2.31E-11 3.12E-11 8.63E-11 1.09E-11 7.35E-09 1.

51207319 

2,3,7,8-Tetrachlorodibenzofuran 3.58E-10 4.44E-10 3.81E-10 4.63E-10 5.72E-10 2.70E-10 3.65E-10 1.01E-09 1.28E-10 1.81E-08 1.

57117416 

1,2,3,7,8-Pentachlorodibenzofuran 6.44E-11 7.98E-11 6.84E-11 8.33E-11 1.03E-10 4.86E-11 6.57E-11 1.81E-10 2.30E-11 7.85E-09 2.

57117314 

2,3,4,7,8-Pentachlorodibenzofuran 2.66E-10 3.30E-10 2.83E-10 3.44E-10 4.25E-10 2.01E-10 2.71E-10 7.50E-10 9.49E-11 3.34E-08 1.

70648269 

1,2,3,4,7,8-Hexachlorodibenzofuran 1.04E-10 1.29E-10 1.10E-10 1.34E-10 1.66E-10 7.85E-11 1.06E-10 2.93E-10 3.71E-11 1.20E-08 4.

57117449 

1,2,3,6,7,8-Hexachlorodibenzofuran 7.15E-11 8.86E-11 7.59E-11 9.24E-11 1.14E-10 5.39E-11 7.29E-11 2.01E-10 2.55E-11 6.08E-09 2.

72918219 

1,2,3,7,8,9-Hexachlorodibenzofuran 8.40E-11 1.04E-10 8.91E-11 1.09E-10 1.34E-10 6.33E-11 8.56E-11 2.36E-10 2.99E-11 2.14E-09 3.

60851345 

2,3,4,6,7,8-Hexachlorodibenzofuran 9.19E-11 1.14E-10 9.75E-11 1.19E-10 1.46E-10 6.93E-11 9.36E-11 2.59E-10 3.27E-11 4.09E-09 3.

67562394 

1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.10E-11 2.60E-11 2.23E-11 2.72E-11 3.35E-11 1.59E-11 2.14E-11 5.92E-11 7.49E-12 2.08E-08 8.

55673897 

1,2,3,4,7,8,9-Heptachlorodibenzofuran 9.31E-12 1.15E-11 9.88E-12 1.20E-11 1.48E-11 7.02E-12 9.49E-12 2.62E-11 3.32E-12 2.47E-09 3.

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (estimated to be equal to 1.9 times estimated actual emissions for poly

times estimated actual emissions for other species) are provided above; actual and acute emissions were modeled as zero. 
Table A-6: 2013 Potline Roof Vent Organic Emission Rates (per release point) 

CAS Pollutant Massena 

West 

Warrick Wenatchee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East Ce

of 

11 

Release 

Points 

10 

Release 

Points 

8 Release 

Points 

4 Release 

Points 

3 Release 

Points 

6 Release 

Points 

24 

Release 

Points 

8 Release 

Points 

6 Release 

Points 

4 Release 

Points 

1 R

P

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

18

to

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (to

Polychlorinated Biphenyls 70362504 3,4,4',5-TCB (PCB-81) 2.50E-08 7.10E-08 4.87E-08 1.19E-07 1.95E-07 6.92E-08 2.34E-08 6.46E-08 9.80E-08 1.91E-07 3.632598133 3,3',4,4'-TCB (PCB-77) 1.37E-07 3.89E-07 2.66E-07 6.49E-07 1.07E-06 3.78E-07 1.28E-07 3.53E-07 5.37E-07 1.99E-06 1.965510443 2',3,4,4',5-PeCB (PCB-123) 4.02E-08 1.14E-07 7.83E-08 1.91E-07 3.14E-07 1.11E-07 3.76E-08 1.04E-07 1.58E-07 1.91E-07 5.731508006 2,3',4,4',5-PeCB (PCB-118) 1.76E-06 4.99E-06 3.42E-06 8.33E-06 1.37E-05 4.86E-06 1.64E-06 4.54E-06 6.89E-06 8.47E-06 2.574472370 2,3,4,4',5-PeCB (PCB-114) 6.29E-08 1.78E-07 1.22E-07 2.98E-07 4.90E-07 1.74E-07 5.87E-08 1.62E-07 2.46E-07 2.53E-07 9.032598144 2,3,3',4,4'-PeCB (PCB-105) 5.03E-07 1.14E-07 9.78E-07 2.38E-06 3.92E-06 1.39E-06 3.76E-08 1.30E-06 1.97E-06 3.37E-06 7.257465288 3,3',4,4',5-PeCB (PCB-126) 2.93E-08 8.32E-08 5.70E-08 1.39E-07 2.28E-07 8.10E-08 2.74E-08 7.56E-08 1.15E-07 2.51E-07 4.252663726 

2,3',4,4',5,5'-HxCB (PCB167) 6.50E-08 1.85E-07 1.27E-07 3.08E-07 5.07E-07 1.80E-07 6.08E-08 1.68E-07 2.55E-07 1.55E-07 9.3

38380084 

2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) 1.75E-07 4.96E-07 3.40E-07 8.27E-07 1.36E-06 4.83E-07 1.63E-07 4.51E-07 6.85E-07 4.44E-07 2.5

32774166 

3,3',4,4',5,5'-HxCB (PCB169) 1.39E-08 3.95E-08 2.71E-08 6.59E-08 1.08E-07 3.85E-08 1.30E-08 3.59E-08 5.45E-08 3.98E-08 2.0

39635319 

2,3,3',4,4',5,5'-HpCB (PCB189) 3.15E-08 8.94E-08 6.13E-08 1.49E-07 2.46E-07 8.71E-08 2.94E-08 8.13E-08 1.23E-07 3.78E-08 4.5

Polycyclic Aromatic Hydrocarbons 91203 Naphthalene 1.29E-02 3.67E-02 2.51E-02 6.12E-02 1.01E-01 3.57E-02 1.21E-02 3.34E-02 5.07E-02 2.25E-01 1.891576 2-Methylnaphthalene 1.22E-03 3.47E-03 2.38E-03 5.79E-03 9.52E-03 3.38E-03 1.14E-03 3.15E-03 4.79E-03 1.54E-01 1.783329 Acenaphthene 1.33E-03 3.77E-03 2.58E-03 6.29E-03 1.04E-02 3.67E-03 1.24E-03 3.43E-03 5.21E-03 3.24E-01 1.9208968 Acenaphthylene 4.55E-05 1.29E-04 8.86E-05 2.16E-04 3.55E-04 1.26E-04 4.25E-05 1.18E-04 1.78E-04 2.58E-02 6.586737 Fluorene 5.81E-04 1.65E-03 1.13E-03 2.75E-03 4.53E-03 1.61E-03 5.43E-04 1.50E-03 2.28E-03 5.96E-02 8.385018 Phenanthrene 1.32E-03 3.76E-03 2.57E-03 6.27E-03 1.03E-02 3.66E-03 1.24E-03 3.41E-03 5.18E-03 4.59E-01 1.9120127 Anthracene 1.39E-04 3.93E-04 2.70E-04 6.56E-04 1.08E-03 3.83E-04 1.29E-04 3.58E-04 5.43E-04 5.14E-02 1.9206440 Fluoranthene 1.25E-03 3.55E-03 2.43E-03 5.92E-03 9.74E-03 3.45E-03 1.17E-03 3.22E-03 4.90E-03 6.68E-01 1.8129000 Pyrene 3.59E-04 1.02E-03 6.99E-04 1.70E-03 2.80E-03 9.93E-04 3.36E-04 9.27E-04 1.41E-03 1.60E-01 5.1
56553 Benz[a]Anthracene 5.06E-05 1.44E-04 9.85E-05 2.40E-04 3.95E-04 1.40E-04 4.73E-05 1.31E-04 1.98E-04 8.20E-02 7.2218019 Chrysene 2.86E-04 8.13E-04 5.57E-04 1.36E-03 2.23E-03 7.92E-04 2.68E-04 7.39E-04 1.12E-03 2.43E-01 4.1205992 Benzo[b]Fluoranthene 2.23E-04 6.35E-04 4.35E-04 1.06E-03 1.74E-03 6.18E-04 2.09E-04 5.77E-04 8.76E-04 2.98E-01 3.2207089 Benzo[k]Fluoranthene 4.99E-05 1.42E-04 9.70E-05 2.36E-04 3.89E-04 1.38E-04 4.66E-05 1.29E-04 1.95E-04 1.13E-01 7.1192972 Benzo[e]Pyrene 9.03E-05 2.57E-04 1.76E-04 4.28E-04 7.04E-04 2.50E-04 8.44E-05 2.33E-04 3.54E-04 1.60E-01 1.350328 Benzo[a]Pyrene 1.50E-05 4.25E-05 2.91E-05 7.09E-05 1.17E-04 4.14E-05 1.40E-05 3.86E-05 5.87E-05 4.11E-02 2.1198550 Perylene 1.11E-05 3.16E-05 2.17E-05 5.27E-05 8.68E-05 3.08E-05 1.04E-05 2.87E-05 4.36E-05 9.71E-03 1.6193395 Indeno[1,2,3-c,d]Pyrene 3.37E-05 9.56E-05 6.55E-05 1.59E-04 2.62E-04 9.31E-05 3.14E-05 8.69E-05 1.32E-04 5.03E-02 4.853703 Dibenzo[a,h]Anthracene 2.93E-05 8.32E-05 5.70E-05 1.39E-04 2.29E-04 8.10E-05 2.74E-05 7.57E-05 1.15E-04 1.53E-02 4.2191242 Benzo[g,h,i,]Perylene 4.66E-05 1.32E-04 9.07E-05 2.21E-04 3.64E-04 1.29E-04 4.36E-05 1.20E-04 1.83E-04 6.19E-02 6.7Dioxins and Furans 1746016 

2,3,7,8-Tetrachlorodibenzop-Dioxin 4.58E-09 1.30E-08 8.91E-09 2.17E-08 3.57E-08 1.27E-08 4.28E-09 1.18E-08 1.80E-08 1.24E-08 6.5

40321764 

1,2,3,7,8-Pentachlorodibenzo-p-Dioxin 3.89E-09 1.11E-08 7.58E-09 1.84E-08 3.04E-08 1.08E-08 3.64E-09 1.00E-08 1.53E-08 2.36E-08 5.6

39227286 

1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin 3.87E-10 1.10E-09 7.52E-10 1.83E-09 3.01E-09 1.07E-09 3.61E-10 9.98E-10 1.52E-09 1.85E-08 5.5

57653857 

1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin 7.73E-10 2.19E-09 1.50E-09 3.66E-09 6.02E-09 2.14E-09 7.22E-10 1.99E-09 3.03E-09 1.84E-08 1.1

19408743 

1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin 7.40E-10 2.10E-09 1.44E-09 3.51E-09 5.77E-09 2.05E-09 6.91E-10 1.91E-09 2.90E-09 2.27E-08 1.0

35822469 

1,2,3,4,6,7,8-Heptachlorodibenzodioxin 3.63E-10 1.03E-09 7.06E-10 1.72E-09 2.83E-09 1.00E-09 3.39E-10 9.36E-10 1.42E-09 9.86E-08 5.2

51207319 

2,3,7,8-Tetrachlorodibenzofuran 1.10E-09 3.11E-09 2.13E-09 5.19E-09 8.54E-09 3.03E-09 1.02E-09 2.83E-09 4.30E-09 1.70E-07 1.5

57117416 

1,2,3,7,8-Pentachlorodibenzofuran 4.29E-10 1.22E-09 8.35E-10 2.03E-09 3.35E-09 1.19E-09 4.01E-10 1.11E-09 1.68E-09 9.99E-08 6.1

57117314 

2,3,4,7,8-Pentachlorodibenzofuran 1.45E-09 4.13E-09 2.83E-09 6.89E-09 1.13E-08 4.02E-09 1.36E-09 3.75E-09 5.70E-09 2.01E-07 2.0

70648269 

1,2,3,4,7,8-Hexachlorodibenzofuran 4.77E-10 1.35E-09 9.28E-10 2.26E-09 3.72E-09 1.32E-09 4.45E-10 1.23E-09 1.87E-09 1.31E-07 6.8

57117449 

1,2,3,6,7,8-Hexachlorodibenzofuran 6.07E-10 1.72E-09 1.18E-09 2.88E-09 4.73E-09 1.68E-09 5.67E-10 1.57E-09 2.38E-09 1.11E-07 8.7

72918219 

1,2,3,7,8,9-Hexachlorodibenzofuran 6.49E-10 1.84E-09 1.26E-09 3.07E-09 5.06E-09 1.79E-09 6.06E-10 1.67E-09 2.54E-09 6.83E-09 9.3

60851345 

2,3,4,6,7,8-Hexachlorodibenzofuran 6.84E-10 1.94E-09 1.33E-09 3.24E-09 5.33E-09 1.89E-09 6.39E-10 1.77E-09 2.68E-09 9.96E-08 9.8

67562394 

1,2,3,4,6,7,8-Heptachlorodibenzofuran 2.22E-10 6.32E-10 4.33E-10 1.05E-09 1.73E-09 6.15E-10 2.08E-10 5.74E-10 8.72E-10 4.90E-07 3.2

55673897 

1,2,3,4,7,8,9-Heptachlorodibenzofuran 9.89E-11 2.81E-10 1.93E-10 4.69E-10 7.71E-10 2.74E-10 9.24E-11 2.55E-10 3.88E-10 7.60E-08 1.4

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (estimated to be equal to 1.9 times the estimated actuahydrocarbons and 1.0 times the estimated actual emissions for other species) are provided above; actual and acute emissions were modeled as ze
Table A-7: 2013 Anode Bake Furnace Organic Emission Rates (per release point) 

CAS Pollutant Massena 

West 

Warrick Wenatchee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East C

o

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

3 Release 

Points 

1 Release 

Point 

0 Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 

81,681 

ton anode 

168,663 

ton anode 

115,596 

ton anode 

140,733 

ton anode 

173,679 

ton anode 

123,177 

ton anode 

0 ton 

anode 

153,330 

ton anode 

174,648 

ton anode 

0 ton 

anode 

1

to

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (

Polychlorinated Biphenyls 70362504 3,4,4',5-TCB (PCB-81) 2.54E-09 5.24E-09 3.59E-09 4.38E-09 1.80E-09 3.83E-09 N/A 4.77E-09 5.43E-09 N/A 332598133 3,3',4,4'-TCB (PCB-77) 6.20E-09 1.28E-08 8.78E-09 1.07E-08 4.40E-09 9.36E-09 N/A 1.16E-08 1.33E-08 N/A 865510443 2',3,4,4',5-PeCB (PCB-123) 1.52E-09 3.15E-09 2.16E-09 2.63E-09 1.08E-09 2.30E-09 N/A 2.86E-09 3.26E-09 N/A 131508006 2,3',4,4',5-PeCB (PCB-118) 3.90E-08 8.06E-08 5.52E-08 6.72E-08 2.77E-08 5.89E-08 N/A 7.33E-08 8.34E-08 N/A 574472370 2,3,4,4',5-PeCB (PCB-114) 1.46E-09 3.01E-09 2.07E-09 2.52E-09 1.03E-09 2.20E-09 N/A 2.74E-09 3.12E-09 N/A 132598144 2,3,3',4,4'-PeCB (PCB-105) 1.66E-08 3.42E-08 2.34E-08 2.85E-08 1.17E-08 2.50E-08 N/A 3.11E-08 3.54E-08 N/A 257465288 3,3',4,4',5-PeCB (PCB-126) 1.49E-09 3.07E-09 2.10E-09 2.56E-09 1.05E-09 2.24E-09 N/A 2.79E-09 3.18E-09 N/A 152663726 

2,3',4,4',5,5'-HxCB (PCB167) 1.83E-09 3.77E-09 2.59E-09 3.15E-09 1.29E-09 2.76E-09 N/A 3.43E-09 3.91E-09 N/A 2

38380084 

2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) 1.90E-09 3.93E-09 2.69E-09 3.28E-09 1.35E-09 2.87E-09 N/A 3.57E-09 4.07E-09 N/A 2

32774166 

3,3',4,4',5,5'-HxCB (PCB169) 1.65E-09 3.41E-09 2.34E-09 2.85E-09 1.17E-09 2.49E-09 N/A 3.10E-09 3.53E-09 N/A 2

39635319 

2,3,3',4,4',5,5'-HpCB (PCB189) 1.38E-09 2.84E-09 1.95E-09 2.37E-09 9.75E-10 2.07E-09 N/A 2.58E-09 2.94E-09 N/A 1

Polycyclic Aromatic Hydrocarbons 91203 Naphthalene 2.12E-01 4.37E-01 3.00E-01 3.65E-01 1.50E-01 3.19E-01 N/A 3.97E-01 4.53E-01 N/A 291576 2-Methylnaphthalene 3.05E-02 6.29E-02 4.31E-02 5.25E-02 2.16E-02 4.59E-02 N/A 5.72E-02 6.51E-02 N/A 383329 Acenaphthene 1.34E-03 2.78E-03 1.90E-03 2.32E-03 9.53E-04 2.03E-03 N/A 2.52E-03 2.87E-03 N/A 1208968 Acenaphthylene 9.48E-03 1.96E-02 1.34E-02 1.63E-02 6.72E-03 1.43E-02 N/A 1.78E-02 2.03E-02 N/A 186737 Fluorene 4.55E-03 9.41E-03 6.45E-03 7.85E-03 3.23E-03 6.87E-03 N/A 8.55E-03 9.74E-03 N/A 585018 Phenanthrene 1.34E-01 2.76E-01 1.89E-01 2.31E-01 9.49E-02 2.02E-01 N/A 2.51E-01 2.86E-01 N/A 1120127 Anthracene 1.15E-03 2.37E-03 1.63E-03 1.98E-03 8.14E-04 1.73E-03 N/A 2.16E-03 2.46E-03 N/A 1206440 Fluoranthene 1.91E-01 3.94E-01 2.70E-01 3.29E-01 1.35E-01 2.88E-01 N/A 3.58E-01 4.08E-01 N/A 2129000 Pyrene 1.62E-04 3.35E-04 2.30E-04 2.80E-04 1.15E-04 2.45E-04 N/A 3.05E-04 3.47E-04 N/A 2
56553 Benz[a]Anthracene 1.22E-04 2.52E-04 1.72E-04 2.10E-04 8.64E-05 1.84E-04 N/A 2.29E-04 2.61E-04 N/A 1218019 Chrysene 1.57E-02 3.23E-02 2.21E-02 2.70E-02 1.11E-02 2.36E-02 N/A 2.94E-02 3.35E-02 N/A 2205992 Benzo[b]Fluoranthene 1.20E-02 2.48E-02 1.70E-02 2.07E-02 8.50E-03 1.81E-02 N/A 2.25E-02 2.56E-02 N/A 1207089 Benzo[k]Fluoranthene 4.26E-04 8.79E-04 6.03E-04 7.34E-04 3.02E-04 6.42E-04 N/A 7.99E-04 9.10E-04 N/A 5192972 Benzo[e]Pyrene 6.28E-04 1.30E-03 8.89E-04 1.08E-03 4.45E-04 9.47E-04 N/A 1.18E-03 1.34E-03 N/A 850328 Benzo[a]Pyrene 2.91E-05 6.01E-05 4.12E-05 5.02E-05 2.06E-05 4.39E-05 N/A 5.47E-05 6.22E-05 N/A 3198550 Perylene 9.33E-06 1.93E-05 1.32E-05 1.61E-05 6.61E-06 1.41E-05 N/A 1.75E-05 1.99E-05 N/A 1193395 Indeno[1,2,3-c,d]Pyrene 1.30E-04 2.68E-04 1.84E-04 2.24E-04 9.21E-05 1.96E-04 N/A 2.44E-04 2.78E-04 N/A 153703 Dibenzo[a,h]Anthracene 9.53E-05 1.97E-04 1.35E-04 1.64E-04 6.76E-05 1.44E-04 N/A 1.79E-04 2.04E-04 N/A 1191242 Benzo[g,h,i,]Perylene 4.81E-05 9.92E-05 6.80E-05 8.28E-05 3.41E-05 7.25E-05 N/A 9.02E-05 1.03E-04 N/A 6Dioxins and Furans 1746016 

2,3,7,8-Tetrachlorodibenzo-pDioxin 8.34E-10 1.72E-09 1.18E-09 1.44E-09 5.91E-10 1.26E-09 N/A 1.57E-09 1.78E-09 N/A 1

40321764 

1,2,3,7,8-Pentachlorodibenzop-Dioxin 6.37E-10 1.32E-09 9.02E-10 1.10E-09 4.52E-10 9.61E-10 N/A 1.20E-09 1.36E-09 N/A 8

39227286 

1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin 3.12E-11 6.45E-11 4.42E-11 5.38E-11 2.21E-11 4.71E-11 N/A 5.86E-11 6.68E-11 N/A 4

57653857 

1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin 2.62E-11 5.42E-11 3.71E-11 4.52E-11 1.86E-11 3.96E-11 N/A 4.93E-11 5.61E-11 N/A 3

19408743 

1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin 3.49E-11 7.20E-11 4.94E-11 6.01E-11 2.47E-11 5.26E-11 N/A 6.55E-11 7.46E-11 N/A 4

35822469 

1,2,3,4,6,7,8-Heptachlorodibenzodioxin 3.11E-11 6.42E-11 4.40E-11 5.36E-11 2.20E-11 4.69E-11 N/A 5.84E-11 6.65E-11 N/A 4

51207319 

2,3,7,8-Tetrachlorodibenzofuran 1.37E-10 2.83E-10 1.94E-10 2.37E-10 9.73E-11 2.07E-10 N/A 2.58E-10 2.94E-10 N/A 1

57117416 

1,2,3,7,8-Pentachlorodibenzofuran 1.63E-11 3.36E-11 2.30E-11 2.80E-11 1.15E-11 2.45E-11 N/A 3.06E-11 3.48E-11 N/A 2

57117314 

2,3,4,7,8-Pentachlorodibenzofuran 1.24E-10 2.55E-10 1.75E-10 2.13E-10 8.76E-11 1.86E-10 N/A 2.32E-10 2.64E-10 N/A 1

70648269 

1,2,3,4,7,8-Hexachlorodibenzofuran 3.29E-11 6.80E-11 4.66E-11 5.67E-11 2.33E-11 4.97E-11 N/A 6.18E-11 7.04E-11 N/A 4

57117449 

1,2,3,6,7,8-Hexachlorodibenzofuran 3.31E-11 6.83E-11 4.68E-11 5.70E-11 2.34E-11 4.99E-11 N/A 6.21E-11 7.07E-11 N/A 4

72918219 

1,2,3,7,8,9-Hexachlorodibenzofuran 4.24E-11 8.76E-11 6.01E-11 7.31E-11 3.01E-11 6.40E-11 N/A 7.97E-11 9.07E-11 N/A 5

60851345 

2,3,4,6,7,8-Hexachlorodibenzofuran 1.06E-10 2.18E-10 1.50E-10 1.82E-10 7.49E-11 1.59E-10 N/A 1.98E-10 2.26E-10 N/A 1

67562394 

1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.46E-11 3.01E-11 2.06E-11 2.51E-11 1.03E-11 2.20E-11 N/A 2.74E-11 3.12E-11 N/A 1

55673897 

1,2,3,4,7,8,9-Heptachlorodibenzofuran 5.01E-12 1.04E-11 7.10E-12 8.64E-12 3.55E-12 7.56E-12 N/A 9.41E-12 1.07E-11 N/A 6

- N/A - no applicable emission unit at facility. 
Table A-8: 2013 Paste Plant Organic Emission Rates (per release point) 

CAS Pollutant Massena 

West 

Warrick Wenatchee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East C

o

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 

81,681 

ton anode 

168,663 

ton anode 

115,596 

ton anode 

140,733 

ton anode 

173,679 

ton anode 

123,177 

ton anode 

0 ton 

anode 

153,330 

ton anode 

174,648 

ton anode 

0 ton 

anode 

1

to

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (

Polychlorinated Biphenyls 70362504 3,4,4',5-TCB (PCB-81) 1.64E-09 3.38E-09 2.32E-09 2.82E-09 3.48E-09 2.47E-09 N/A 3.07E-09 3.50E-09 N/A 232598133 3,3',4,4'-TCB (PCB-77) 1.69E-09 3.50E-09 2.40E-09 2.92E-09 3.60E-09 2.56E-09 N/A 3.18E-09 3.62E-09 N/A 265510443 2',3,4,4',5-PeCB (PCB-123) 8.70E-10 1.80E-09 1.23E-09 1.50E-09 1.85E-09 1.31E-09 N/A 1.63E-09 1.86E-09 N/A 131508006 2,3',4,4',5-PeCB (PCB-118) 1.11E-09 2.28E-09 1.57E-09 1.91E-09 2.35E-09 1.67E-09 N/A 2.08E-09 2.36E-09 N/A 174472370 2,3,4,4',5-PeCB (PCB-114) 8.19E-10 1.69E-09 1.16E-09 1.41E-09 1.74E-09 1.23E-09 N/A 1.54E-09 1.75E-09 N/A 132598144 2,3,3',4,4'-PeCB (PCB-105) 8.37E-10 1.73E-09 1.18E-09 1.44E-09 1.78E-09 1.26E-09 N/A 1.57E-09 1.79E-09 N/A 157465288 3,3',4,4',5-PeCB (PCB-126) 7.88E-10 1.63E-09 1.12E-09 1.36E-09 1.68E-09 1.19E-09 N/A 1.48E-09 1.68E-09 N/A 152663726 

2,3',4,4',5,5'-HxCB (PCB167) 4.83E-10 9.98E-10 6.84E-10 8.33E-10 1.03E-09 7.29E-10 N/A 9.07E-10 1.03E-09 N/A 6

38380084 

2,3,3',4,4',5/2,3,3',4,4',5-HxCB (PCBs-156/157) 6.05E-10 1.25E-09 8.57E-10 1.04E-09 1.29E-09 9.13E-10 N/A 1.14E-09 1.29E-09 N/A 7

32774166 

3,3',4,4',5,5'-HxCB (PCB169) 5.64E-10 1.16E-09 7.98E-10 9.71E-10 1.20E-09 8.50E-10 N/A 1.06E-09 1.21E-09 N/A 7

39635319 

2,3,3',4,4',5,5'-HpCB (PCB189) 4.58E-10 9.46E-10 6.48E-10 7.89E-10 9.74E-10 6.91E-10 N/A 8.60E-10 9.79E-10 N/A 5

Polycyclic Aromatic Hydrocarbons 91203 Naphthalene 6.62E-03 1.37E-02 9.37E-03 1.14E-02 1.41E-02 9.98E-03 N/A 1.24E-02 1.42E-02 N/A 891576 2-Methylnaphthalene 2.62E-03 5.41E-03 3.71E-03 4.51E-03 5.57E-03 3.95E-03 N/A 4.92E-03 5.60E-03 N/A 383329 Acenaphthene 9.94E-02 2.05E-01 1.41E-01 1.71E-01 2.11E-01 1.50E-01 N/A 1.87E-01 2.12E-01 N/A 1208968 Acenaphthylene 1.69E-04 3.50E-04 2.40E-04 2.92E-04 3.60E-04 2.56E-04 N/A 3.18E-04 3.62E-04 N/A 286737 Fluorene 1.27E-02 2.63E-02 1.80E-02 2.19E-02 2.70E-02 1.92E-02 N/A 2.39E-02 2.72E-02 N/A 185018 Phenanthrene 3.79E-02 7.82E-02 5.36E-02 6.52E-02 8.05E-02 5.71E-02 N/A 7.11E-02 8.09E-02 N/A 4120127 Anthracene 2.91E-03 6.02E-03 4.12E-03 5.02E-03 6.19E-03 4.39E-03 N/A 5.47E-03 6.23E-03 N/A 3206440 Fluoranthene 2.67E-03 5.51E-03 3.77E-03 4.59E-03 5.67E-03 4.02E-03 N/A 5.01E-03 5.70E-03 N/A 3129000 Pyrene 1.42E-03 2.94E-03 2.02E-03 2.45E-03 3.03E-03 2.15E-03 N/A 2.67E-03 3.04E-03 N/A 1
56553 Benz[a]Anthracene 1.64E-05 3.38E-05 2.32E-05 2.82E-05 3.48E-05 2.47E-05 N/A 3.07E-05 3.50E-05 N/A 2218019 Chrysene 2.85E-07 5.89E-07 4.03E-07 4.91E-07 6.06E-07 4.30E-07 N/A 5.35E-07 6.09E-07 N/A 3205992 Benzo[b]Fluoranthene 6.96E-06 1.44E-05 9.84E-06 1.20E-05 1.48E-05 1.05E-05 N/A 1.31E-05 1.49E-05 N/A 9207089 Benzo[k]Fluoranthene 2.15E-06 4.43E-06 3.04E-06 3.70E-06 4.56E-06 3.24E-06 N/A 4.03E-06 4.59E-06 N/A 2192972 Benzo[e]Pyrene 3.41E-06 7.04E-06 4.82E-06 5.87E-06 7.24E-06 5.14E-06 N/A 6.40E-06 7.28E-06 N/A 450328 Benzo[a]Pyrene 2.17E-06 4.48E-06 3.07E-06 3.74E-06 4.62E-06 3.27E-06 N/A 4.07E-06 4.64E-06 N/A 2198550 Perylene 4.29E-07 8.85E-07 6.07E-07 7.39E-07 9.12E-07 6.47E-07 N/A 8.05E-07 9.17E-07 N/A 5193395 Indeno[1,2,3-c,d]Pyrene 6.33E-07 1.31E-06 8.96E-07 1.09E-06 1.35E-06 9.55E-07 N/A 1.19E-06 1.35E-06 N/A 853703 Dibenzo[a,h]Anthracene 2.85E-07 5.89E-07 4.03E-07 4.91E-07 6.06E-07 4.30E-07 N/A 5.35E-07 6.09E-07 N/A 3191242 Benzo[g,h,i,]Perylene 6.07E-07 1.25E-06 8.59E-07 1.05E-06 1.29E-06 9.15E-07 N/A 1.14E-06 1.30E-06 N/A 7Dioxins and Furans 1746016 

2,3,7,8-Tetrachlorodibenzo-pDioxin 2.07E-11 4.26E-11 2.92E-11 3.56E-11 4.39E-11 3.11E-11 N/A 3.88E-11 4.42E-11 N/A 2

40321764 

1,2,3,7,8-Pentachlorodibenzop-Dioxin 1.96E-11 4.04E-11 2.77E-11 3.37E-11 4.16E-11 2.95E-11 N/A 3.68E-11 4.19E-11 N/A 2

39227286 

1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin 1.34E-12 2.76E-12 1.89E-12 2.31E-12 2.85E-12 2.02E-12 N/A 2.51E-12 2.86E-12 N/A 1

57653857 

1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin 2.09E-12 4.32E-12 2.96E-12 3.60E-12 4.45E-12 3.16E-12 N/A 3.93E-12 4.47E-12 N/A 2

19408743 

1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin 1.41E-12 2.92E-12 2.00E-12 2.44E-12 3.01E-12 2.13E-12 N/A 2.66E-12 3.02E-12 N/A 1

35822469 

1,2,3,4,6,7,8-Heptachlorodibenzodioxin 2.82E-13 5.83E-13 4.00E-13 4.87E-13 6.01E-13 4.26E-13 N/A 5.30E-13 6.04E-13 N/A 3

51207319 

2,3,7,8-Tetrachlorodibenzofuran 1.22E-12 2.53E-12 1.73E-12 2.11E-12 2.60E-12 1.85E-12 N/A 2.30E-12 2.62E-12 N/A 1

57117416 

1,2,3,7,8-Pentachlorodibenzofuran 7.79E-13 1.61E-12 1.10E-12 1.34E-12 1.66E-12 1.17E-12 N/A 1.46E-12 1.67E-12 N/A 1

57117314 

2,3,4,7,8-Pentachlorodibenzofuran 2.75E-12 5.68E-12 3.90E-12 4.74E-12 5.85E-12 4.15E-12 N/A 5.17E-12 5.89E-12 N/A 3

70648269 

1,2,3,4,7,8-Hexachlorodibenzofuran 1.30E-12 2.68E-12 1.84E-12 2.24E-12 2.76E-12 1.96E-12 N/A 2.44E-12 2.78E-12 N/A 1

57117449 

1,2,3,6,7,8-Hexachlorodibenzofuran 1.47E-12 3.05E-12 2.09E-12 2.54E-12 3.14E-12 2.22E-12 N/A 2.77E-12 3.15E-12 N/A 1

72918219 

1,2,3,7,8,9-Hexachlorodibenzofuran 1.26E-12 2.61E-12 1.79E-12 2.18E-12 2.69E-12 1.90E-12 N/A 2.37E-12 2.70E-12 N/A 1

60851345 

2,3,4,6,7,8-Hexachlorodibenzofuran 1.96E-12 4.04E-12 2.77E-12 3.37E-12 4.16E-12 2.95E-12 N/A 3.67E-12 4.18E-12 N/A 2

67562394 

1,2,3,4,6,7,8-Heptachlorodibenzofuran 1.15E-13 2.37E-13 1.62E-13 1.98E-13 2.44E-13 1.73E-13 N/A 2.15E-13 2.45E-13 N/A 1

55673897 

1,2,3,4,7,8,9-Heptachlorodibenzofuran 1.53E-13 3.16E-13 2.17E-13 2.64E-13 3.25E-13 2.31E-13 N/A 2.87E-13 3.27E-13 N/A 2

- N/A - no applicable emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (estimated to be equal to 1.9 times estimated actual emissions for poly

times estimated actual emissions for other species) are provided above; actual and acute emissions were modeled as zero. 
Table A-9: 2013 Pitch Storage Tank Emission Rates (per release point)

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East Cent

of W

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Rele

Poi

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

187,4

ton 

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/

91203 Naphthalene 2.53E-03 5.22E-03 1.79E-04 4.35E-03 5.37E-03 3.81E-03 N/A 4.74E-03 2.70E-04 N/A 3.30E91576 2-Methylnaphthalene 1.92E-03 3.97E-03 1.36E-04 3.31E-03 4.09E-03 2.90E-03 N/A 3.61E-03 2.05E-04 N/A 2.51E83329 Acenaphthene 4.38E-03 9.04E-03 3.10E-04 7.55E-03 9.31E-03 6.60E-03 N/A 8.22E-03 4.68E-04 N/A 5.73E208968 Acenaphthylene 3.44E-04 7.11E-04 2.44E-05 5.93E-04 7.32E-04 5.19E-04 N/A 6.47E-04 3.68E-05 N/A 4.50E86737 Fluorene 8.67E-04 1.79E-03 6.14E-05 1.49E-03 1.84E-03 1.31E-03 N/A 1.63E-03 9.27E-05 N/A 1.13E85018 Phenanthrene 7.17E-03 1.48E-02 5.07E-04 1.24E-02 1.52E-02 1.08E-02 N/A 1.35E-02 7.67E-04 N/A 9.38E120127 Anthracene 8.03E-04 1.66E-03 5.68E-05 1.38E-03 1.71E-03 1.21E-03 N/A 1.51E-03 8.58E-05 N/A 1.05E206440 Fluoranthene 1.18E-02 2.44E-02 8.38E-04 2.04E-02 2.52E-02 1.79E-02 N/A 2.22E-02 1.27E-03 N/A 1.55E129000 Pyrene 2.83E-03 5.84E-03 2.00E-04 4.87E-03 6.01E-03 4.26E-03 N/A 5.31E-03 3.02E-04 N/A 3.70E56553 Benz[a]anthracene 1.64E-03 3.39E-03 1.16E-04 2.83E-03 3.49E-03 2.47E-03 N/A 3.08E-03 1.75E-04 N/A 2.15E218019 Chrysene 4.85E-03 1.00E-02 3.43E-04 8.36E-03 1.03E-02 7.32E-03 N/A 9.11E-03 5.19E-04 N/A 6.35E205992 Benzo[b]fluoranthene 6.58E-03 1.36E-02 4.66E-04 1.13E-02 1.40E-02 9.92E-03 N/A 1.24E-02 7.04E-04 N/A 8.61E207089 Benzo[k]fluoranthene 2.51E-03 5.18E-03 1.77E-04 4.32E-03 5.33E-03 3.78E-03 N/A 4.71E-03 2.68E-04 N/A 3.28E192972 Benzo[e]pyrene 3.55E-03 7.32E-03 2.51E-04 6.11E-03 7.54E-03 5.35E-03 N/A 6.66E-03 3.79E-04 N/A 4.64E50328 Benzo[a]pyrene 9.09E-04 1.88E-03 6.43E-05 1.57E-03 1.93E-03 1.37E-03 N/A 1.71E-03 9.71E-05 N/A 1.19E198550 Perylene 2.15E-04 4.43E-04 1.52E-05 3.70E-04 4.56E-04 3.24E-04 N/A 4.03E-04 2.29E-05 N/A 2.81E193395 Indeno[1,2,3-c,d]Pyrene 1.22E-03 2.51E-03 8.61E-05 2.10E-03 2.59E-03 1.83E-03 N/A 2.28E-03 1.30E-04 N/A 1.59E53703 Dibenzo[a,h]anthracene 3.72E-04 7.68E-04 2.63E-05 6.41E-04 7.91E-04 5.61E-04 N/A 6.98E-04 3.98E-05 N/A 4.86E191242 Benzo[g,h,i,]Perylene 1.50E-03 3.09E-03 1.06E-04 2.58E-03 3.19E-03 2.26E-03 N/A 2.81E-03 1.60E-04 N/A 1.96E- N/A = Not applicable, no pitch storage tank at facility. - Lake Charles based on Anode production - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (estimated to be equal to 1.9 times estimated actual emissions) are showere modeled as zero. - Control Multiplier (1 - control efficiency)  - Wenatchee = 0.05  - Intalco = 0.05  - Lake Charles = 0.01 
Table A-10: 2013 Hydrogen Fluoride Emission Rates (per release point)

CAS Pollutant Massena West Warrick Wenat- chee Alumax Noranda Century - Sebree Ormet Century of KY Intalco Massena East Centur

of WV 

(ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr

Potline Stack 

3 Release 

Points 

5 Release 

Points 

4 Release 

Points 

4 Release 

Points 

4 Release 

Points 

6 Release 

Points 

6 Release 

Points 

2 Release 

Points 

18 

Release 

Points 

2 Release 

Points 

1 Relea

Point 

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

187,40

ton Al 

7664393 Hydrogen Fluoride 1.194 2.367 1.115 1.440 1.105 1.135 1.217 25.219 0.426 0.689 9.417 Potline Roof Vent 

11 

Release 

Points 

10 

Release 

Points 

8 Release 

Points 

4 Release 

Points 

3 Release 

Points 

6 Release 

Points 

24 

Release 

Points 

8 Release 

Points 

6 Release 

Points 

4 Release 

Points 

1 Relea

Point 

143,300 

ton Al 

295,900 

ton Al 

202,800 

ton Al 

246,900 

ton Al 

304,700 

ton Al 

216,100 

ton Al 

292,100 

ton Al 

269,000 

ton Al 

306,400 

ton Al 

91,867 

ton Al 

187,40

ton Al 

7664393 Hydrogen Fluoride 2.996 12.206 5.577 14.900 38.595 10.265 4.747 5.750 7.163 11.828 84.752 Anode Bake Furnace 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

1 Release 

Point 

3 Release 

Points 

1 Release 

Point 

0 Release 

Points 

1 Release 

Point 

1 Release 

Point 

0 Release 

Points 

1 Relea

Point 

81,681 

ton 

Anode 

168,663 

ton 

Anode 

115,596 

ton 

Anode 

140,733 

ton 

Anode 

173,679 

ton 

Anode 

123,177 

ton 

Anode 

166,497 

ton 

Anode 

153,330 

ton 

Anode 

174,648 

ton 

Anode 

52,364 

ton 

Anode 

106,81

ton 

Anode 

7664393 Hydrogen Fluoride 2.736 5.650 3.872 0.050 1.939 0.049 N/A 5.137 0.891 N/A 3.578 - N/A = Not applicable, no emission unit at facility. - Columbia Falls Aluminum Company is not in operation. Allowable emissions estimates (estimated to be equal to 1.9 times estimated actual emissions) are proemissions were modeled as zero. 
16 

Table A-11: 2013 Potline Stack COS Emission Rates (per release point) 

NEI Site ID Facility Name COS Emissions Rates 

(tons/yr) 

NEI39458 Alcoa - Massena West 7.08E+01 

NEI32661 Alcoa - Warrick 1.03E+02 

NEI42328 Alcoa - Wenatchee 8.38E+01 

NEI41217 Alumax - Mt. Holly 9.67E+01 

NEI34464 Noranda Aluminum 2.44E+01 

NEI11365 Century - Sebree 5.13E+01 

NEIOH1110001 Ormet Primary Aluminum 6.77E+01 

NEIKY0912109100004 Century Aluminum of KY 1.92E+02 

NEIWA19906 Intalco Aluminum 8.84E+00 

NEI46970 Alcoa - Massena East 6.26E+01 

NEI700 Century Aluminum of WV 2.51E+02 

NEI6464 Alcoa - Rockdale 4.53E+00 

NEI12468 Columbia Falls Aluminum 1.69E+02 

NEI5988 Lake Charles Carbon N/A 

- COS emission rates from potline roof vents are assumed to be zero. All COS emissions, estimated by a mass balance approach, are 

attributed to the potline stacks.