Instructions

Sample and analyze the particulate matter collected in the hopper from each bag house or electrostatic precipitator (ESP) used to control particulate 

matter from potlines. Where more than one bag house or ESP discharges solids to a common hopper, a single sample will be adequate. In cases 

where solids from different compartments of a single bag house or ESP are collected in multiple hoppers or multiple collection sacks, a single 

composite sample will be adequate.

If a wet scrubber is used to control emissions from a potline, sample and analyze the scrubber sludge removed from the scrubber, and estimate the 

annual mass (dry basis) of this sludge. In addition, if applicable, sample and analyze the slurry injected into the scrubber and estimate the annual mass 

(dry basis) of the injected slurry. Finally, if there is an aqueous discharge or blowdown stream from the scrubber, sample and analyze the this liquid and 

estimate the annual volume discharged.

You must report the results of these chemical analyses in this Microsoft® Excel Emission Test Template. If more than one source was tested, you must 

make a copy of the worksheet and update the source ID in order to distinguish between each separate source of particulate matter. After completing 

the worksheet, you must also submit an electronic copy of the emission test report and the chemical analyses. (PDF format preferred).
Electrostatic Precipitator Dust

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP 432001

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17850 AL17859 AL19047 AL19057 AL19067

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/27/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 9.34 mg/kg (BDU) 12.5 mg/kg (BD) 8.36 mg/kg (DU) 7.68 mg/kg (DU) 6.17 mg/kg (DU)

Beryllium 55.1 mg/kg (D) 61.4 mg/kg (D) 53.5 mg/kg (D) 54.2 mg/kg (D) 54.1 mg/kg (D)

Chromium 18.7 mg/kg (DU) 18.6 mg/kg (D) 16.7 mg/kg (DU) 15.4 mg/kg (DU) 12.3 mg/kg (DU)

Hexavalent chromium 3.46 ug/kg (U) 94.6 ug/kg 3.93 ug/kg (U) 3.85 ug/kg (U) 3.88 ug/kg (U)

Lead 78.5 mg/kg (D) 112 mg/kg (D) 88.6 mg/kg (D) 84.5 mg/kg (D) 77.7 mg/kg (D)

Selenium 9.34 mg/kg (DU) 9.32 mg/kg (DU) 8.36 mg/kg (DU) 7.68 mg/kg (DU) 6.17 mg/kg (DU)

Arsenic 19.4 mg/kg (D) 30.7 mg/kg (D) 23.1 mg/kg (D) 23.7 mg/kg (D) 21.7 mg/kg (D)

Cadmium 4.67 mg/kg (DU) 4.66 mg/kg (DU) 4.18 mg/kg (DU) 3.84 mg/kg (DU) 3.08 mg/kg (DU)

Cobalt 30.6 mg/kd (D) 50.3 mg/kg (D) 32.8 mg/kg (D) 33.6 mg/kg (DU) 29.7 mg/kg (D)

Manganese 18.7 mg/kg (DU) 18.6 mg/kg (DU) 16.7 mg/kg (DU) 15.4 mg/kg (DU) 12.3 mg/kg (DU)

Nickel 613 mg/kg (D) 888 mg/kg (D) 624 mg/kg (D) 599 mg/kg (D) 567 mg/kg (D)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Lines 1 thru 4 Air 

Control System

424200, 424220, 

424230, 424240
Dry Alumina Scrubber/Bag House Inlet Feed Alumina

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP 480063, 330140

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17847 AL17856 AL19044 AL19054 AL19064

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 10.3 mg/kg (BD) 9.67 mg/kg (BDU) 9.79 mg/kg (BDU) 8.33 mg/kg (DU) 8.91 mg/kg (DU)

Beryllium 4.13 mg/kg (DU) 4.84 mg/kg (DU) 4.9 mg/kg (DU) 4.16 mg/kg (DU) 4.46 mg/kg (DU)

Chromium 16.5 mg/kg (DU) 19.3 mg/kg (DU) 19.6 mg/kg (DU) 16.7 mg/kg (DU) 17.8 mg/kg (DU)

Hexavalent chromium 77.2 ug/kg 28.0 ug/kg 29.2 ug/kg 27.7 ug/kg 27.2 ug/kg

Lead 4.13 mg/kg (DU) 4.84 mg/kg (DU) 34.9 mg/kg (DU) 4.16 mg/kg (DU) 4.46 mg/kg (DU)

Selenium 8.26 mg/kg (DU) 9.67 mg/kg (DU) 9.79 mg/kg (DU) 8.33 mg/kg (DU) 8.91 mg/kg (DU)

Arsenic 4.13 mg/kg (DU) 4.84 mg/kg (DU) 4.9 mg/kg (DU) 4.16 mg/kg (DU) 4.46 mg/kg (DU)

Cadmium 4.13 mg/kg (DU) 4.84 mg/kg (DU) 4.9 mg/kg (DU) 4.16 mg/kg (DU) 4.46 mg/kg (DU)

Cobalt 16.5 mg/kg (DU) 19.3 mg/kg (DU) 19.6 mg/kg (DU) 39 mg/kg (DU) 17.8 mg/kg (DU)

Manganese 16.5 mg/kg (DU) 19.3 mg/kg (DU) 19.6 mg/kg (DU) 16.7 mg/kg (DU) 17.8 mg/kg (DU)

Nickel 4.13 mg/kg (DU) 4.84 mg/kg (DU) 4.9 mg/kg (DU) 4.16 mg/kg (DU) 4.46 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Inlet Alumina to 

Carbon Bake & Line 

5 Dry Scrubbers

424250, 333301, 

333302, 333307
Dry Alumina Scrubber/Bag House combination Dust Outlet

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP 480063

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17849 AL17858 AL19046 AL19056 AL19066

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/27/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 9.86 mg/kg (BDU) 9.38 mg/kg (BDU) 8.1 mg/kg (DU) 9 mg/kg (DU) 8.92 mg/kg (DU)

Beryllium 4.93 mg/kg (DU) 4.69 mg/kg (DU) 4.05 mg/kg (DU) 4.5 mg/kg (DU) 4.46 mg/kg (DU)

Chromium 19.7 mg/kg (DU) 18.8 mg/kg (DU) 16.2 mg/kg (DU) 18 mg/kg (DU) 17.8 mg/kg (DU)

Hexavalent chromium 3.89 ug/kg (U) 3.62 ug/kg (U) 4.11 ug/kg 3.84 ug/kg 3.45 ug/kg (U)

Lead 4.93 mg/kg (DU) 4.69 mg/kg (DU) 7.38 mg/kg (D) 4.5 mg/kg (DU) 4.46 mg/kg (DU)

Selenium 9.86 mg/kg (DU) 9.38 mg/kg (DU) 8.1 mg/kg (DU) 9 mg/kg (DU) 8.92 mg/kg (DU)

Arsenic 4.93 mg/kg (DU) 4.69 mg/kg (DU) 4.05 mg/kg (DU) 4.54 mg/kg (D) 6.11 mg/kg (D)

Cadmium 4.93 mg/kg (DU) 4.69 mg/kg (DU) 4.05 mg/kg (DU) 4.5 mg/kg (DU) 4.46 mg/kg (DU)

Cobalt 19.7 mg/kg (DU) 18.8 mg/kg (DU) 16.2 mg/kg (DU) 32.7 mg/kg (DU) 17.8 mg/kg (DU)

Manganese 19.7 mg/kg (DU) 18.8 mg/kg (DU) 16.2 mg/kg (DU) 18 mg/kg (DU) 17.8 mg/kg (DU)

Nickel 52.8 mg/kg (D) 36.4 mg/kg (D) 41.4 mg/kg (D) 58.4 mg/kg (D) 47.4 mg/kg (D)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Line 5 Dry Scrubber 424250
Dry Alumina Scrubber/Bag House combination Dust Outlet

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP 330140

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17848 AL17857 AL19045 AL19055 AL19065

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 9.75 mg/kg (BDU) 9.54 mg/kg (BDU) 13.2 mg/kg (BD) 7.15 mg/kg (DU) 7.67 mg/kg (DU)

Beryllium 4.87 mg/kg (DU) 4.77 mg/kg (DU) 4.54 mg/kg (DU) 3.58 mg/kg (DU) 3.84 mg/kg (DU)

Chromium 19.5 mg/kg (DU) 19.1 mg/kg (DU) 18.1 mg/kg (DU) 14.3 mg/kg (DU) 15.3 mg/kg (DU)

Hexavalent chromium 3.29 ug/kg (U) 3.85 ug/kg (U) 3.39 ug/kg (U) 3.81 ug/kg (U) 3.85 ug/kg (U)

Lead 23.0 mg/kg (D) 28.2 mg/kg (D) 37.9 mg/kg (D) 31.0 mg/kg (D) 29.9 mg/kg (D)

Selenium 9.75 mg/kg (DU) 9.54 mg/kg (DU) 9.07 mg/kg (DU) 7.15 mg/kg (DU) 7.67 mg/kg (DU)

Arsenic 4.87 mg/kg (DU) 4.77 mg/kg (DU) 4.54 mg/kg (DU) 3.58 mg/kg (DU) 3.84 mg/kg (DU)

Cadmium 4.87 mg/kg (DU) 4.77 mg/kg (DU) 4.54 mg/kg (DU) 3.58 mg/kg (DU) 3.84 mg/kg (DU)

Cobalt 19.5 mg/kg (DU) 19.1 mg/kg (DU) 18.1 mg/kg (DU) 37.9 mg/kg (DU) 15.3 mg/kg (DU)

Manganese 19.5 mg/kg (DU) 19.1 mg/kg (DU) 18.1 mg/kg (DU) 14.3 mg/kg (DU) 15.3 mg/kg (DU)

Nickel 4.87 mg/kg (DU) 4.77 mg/kg (DU) 0.877 mg/kg (DU) 3.58 mg/kg (DU) 3.84 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Carbon Bake Dry

Alumina Scrubber

333301, 333302, 

333307
Dry Coke Scrubber/Bag House combination Dust

Facility Name and Address Unit Description Control Device ID*

Century Aluminum of Kentucky GP 310126

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17845 AL17854 AL19042 AL19052 AL19062

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

INLET COKE TO 

SCRUBBER

INLET COKE TO 

SCRUBBER

INLET COKE TO 

SCRUBBER

INLET COKE TO 

SCRUBBER

INLET COKE TO 

SCRUBBER

Antimony 8.96 mg/kg (BDU) 9.58 mg/kg (BDU) 9.03 mg/kg (BDU) 9.31 mg/kg (DU) 7.45 mg/kg (DU)

Beryllium 4.48 mg/kg (DU) 4.79 mg/kg (DU) 4.51 mg/kg (DU) 4.66 mg/kg (DU) 3.73 mg/kg (DU)

Chromium 17.9 mg/kg (DU) 19.2 mg/kg (DU) 18.1 mg/kg (DU) 18.6 mg/kg (DU) 14.9 mg/kg (DU)

Hexavalent chromium 3.98 ug/kg (U) 3.97 ug/kg (U) 3.77 ug/kg (U) 3.96 ug/kg (U) 3.8 ug/kg (U)

Lead 7.35 mg/kg (D) 4.79 mg/kg (DU) 4.51 mg/kg (DU) 4.66 mg/kg (DU) 3.73 mg/kg (DU)

Selenium 8.96 mg/kg (DU) 9.58 mg/kg (DU) 9.03 mg/kg (DU) 9.31 mg/kg (DU) 7.45 mg/kg (DU)

Arsenic 4.48 mg/kg (DU) 4.79 mg/kg (DU) 4.51 mg/kg (DU) 4.66 mg/kg (DU) 3.73 mg/kg (DU)

Cadmium 4.48 mg/kg (DU) 4.79 mg/kg (DU) 4.51 mg/kg (DU) 4.66 mg/kg (DU) 3.73 mg/kg (DU)

Cobalt 17.9 mg/kg (DU) 19.2 mg/kg (DU) 18.1 mg/kg (DU) 37.2 mg/kg (DU) 14.9 mg/kg (DU)

Manganese 17.9 mg/kg (DU) 19.2 mg/kg (DU) 18.1 mg/kg (DU) 18.6 mg/kg (DU) 14.9 mg/kg (DU)

Nickel 5.52 mg/kg (D) 4.79 mg/kg (DU) 48.7 mg/kg (D) 4.66 mg/kg (DU) 3.73 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Green Carbon Dry

Coke Scrubber

Process Unit ID

310351, 310352, 310353, 310354, 

310355, 310356, 310357, 310358, 

310359, 310362, 310364, 312035, 

312037, 310425, 312036, 312006, 

310135, 312010
Dry Coke Scrubber/Bag House combination Dust

Facility Name and Address Unit Description Control Device ID*

Century Aluminum of Kentucky GP 310126

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17846 AL17855 AL19043 AL19053 AL19063

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011 4/26/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

OUTLET COKE 

FROM SCRUBBER

OUTLET COKE 

FROM SCRUBBER

OUTLET COKE 

FROM SCRUBBER

OUTLET COKE 

FROM SCRUBBER

OUTLET COKE 

FROM SCRUBBER

Antimony 8.14 mg/kg (BDU) 14.7 mg/kg (BD) 9.85 mg/kg (BDU) 8.06 mg/kg (DU) 7.72 mg/kg (DU)

Beryllium 4.07 mg/kg (DU) 4.69 mg/kg (DU) 4.93 mg/kg (DU) 4.03 mg/kg (DU) 3.86 mg/kg (DU)

Chromium 16.3 mg/kg (DU) 18.7 mg/kg (DU) 19.7 mg/kg (DU) 16.1 mg/kg (DU) 15.4 mg/kg (DU)

Hexavalent chromium 3.76 ug/kg (U) 3.97 ug/kg (U) 3.9 ug/kg (U) 3.94 ug/kg (U) 3.95 ug/kg (U)

Lead 4.07 mg/kg (DU) 4.69 mg/kg (DU) 0.4 mg/kg (DU) 4.03 mg/kg (DU) 3.86 mg/kg (DU)

Selenium 8.14 mg/kg (DU) 9.37 mg/kg (DU) 9.85 mg/kg (DU) 8.06 mg/kg (DU) 7.72 mg/kg (DU)

Arsenic 4.07 mg/kg (DU) 4.69 mg/kg (DU) 4.93 mg/kg (DU) 4.03 mg/kg (DU) 3.86 mg/kg (DU)

Cadmium 4.07 mg/kg (DU) 4.69 mg/kg (DU) 4.93 mg/kg (DU) 4.03 mg/kg (DU) 3.86 mg/kg (DU)

Cobalt 16.3 mg/kg (DU) 18.7 mg/kg (DU) 19.7 mg/kg (DU) 36.8 mg/kg (DU) 15.4 mg/kg (DU)

Manganese 16.3 mg/kg (DU) 18.7 mg/kg (DU) 19.7 mg/kg (DU) 16.1 mg/kg (DU) 15.4 mg/kg (DU)

Nickel 4.07 mg/kg (DU) 8.74 mg/kg (D) 5.87 mg/kg (D) 4.03 mg/kg (DU) 3.86 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

Process Unit ID

Green Carbon Dry

Coke Scrubber

310351, 310352, 310353, 310354, 

310355, 310356, 310357, 310358, 

310359, 310362, 310364, 312035, 

312037, 310425, 312036, 312006, 

310135, 312010
Wet Scrubber Sludge

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP

Lines 1 thru 4 Air 

Control System

424200, 424220, 

424230, 424240 432001

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17861 AL17860 AL19048 AL19058

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 15.8 mg/kg (BDU) 11 mg/kg (BDU) 11.4 mg/kg (DU) 11.5 mg/kg (DU)

Beryllium 7.88 mg/kg (DU) 5.5 mg/kg (DU) 5.72 mg/kg (DU) 5.74 mg/kg (DU)

Chromium 31.5 mg/kg (DU) 22 mg/kg (DU) 22.9 mg/kg (DU) 23 mg/kg (DU)

Hexavalent chromium 5.4 ug/kg (U) 6.05 ug/kg 4.57 ug/kg (U) 10.5 ug/kg

Lead 7.88 mg/kg (DU) 5.5 mg/kg (DU) 5.72 mg/kg (DU) 5.74 mg/kg (DU)

Selenium 15.8 mg/kg (DU) 11 mg/kg (DU) 11.4 mg/kg (DU) 11.5 mg/kg (DU)

Arsenic 6.24 mg/kg (D) 5.5 mg/kg (DU) 9.73 mg/kg (D) 14.0 mg/kg (D)

Cadmium 7.88 mg/kg (DU) 5.5 mg/kg (DU) 5.72 mg/kg (DU) 5.74 mg/kg (DU)

Cobalt 31.5 mg/kg (DU) 22 mg/kg (DU) 22.9 mg/kg (DU) 51.1 mg/kg (DU)

Manganese 31.5 mg/kg (DU) 22 mg/kg (DU) 35.1 mg/kg (D) 39.3 mg/kg (D)

Nickel 7.88 mg/kg (DU) 5.5 mg/kg (DU) 5.72 mg/kg (DU) 5.74 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

Annual mass of sludge (dry basis) 

removed from scrubber (kg)

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

15,552,000
AL19068

4/26/2011

5/27/2011

9.26 mg/kg (DU)

4.63 mg/kg (DU)

18.5 mg/kg (DU)

26.2 ug/kg

4.63 mg/kg (DU)

9.26 mg/kg (DU)

7.15 mg/kg (D)

4.63 mg/kg (DU)

18.5 mg/kg (DU)

24.9 mg/kg (D)

9.81 mg/kg (D)
Wet Scrubber Lime Tank

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP

Lines 1 thru 4 Air 

Control System

424200, 424220, 

424230, 424240 432001

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17851 AL17862 AL19049 AL19059

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011

Date(s) Analyzed 5/26/2011 5/26/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 9.74 mg/kg (BDU) 9.12 mg/kg (BDU) 9.37 mg/kg (DU) 8.82 mg/kg (DU)

Beryllium 4.87 mg/kg (DU) 4.56 mg/kg (DU) 4.69 mg/kg (DU) 4.41 mg/kg (DU)

Chromium 19.5 mg/kg (DU) 18.2 mg/kg (DU) 18.7 mg/kg (DU) 617 mg/kg (D)

Hexavalent chromium 190 ug/kg 24.3 ug/kg 200 ug/kg 211 ug/kg

Lead 4.87 mg/kg (DU) 4.56 mg/kg (DU) 4.69 mg/kg (DU) 4.41 mg/kg (DU)

Selenium 9.74 mg/kg (DU) 9.12 mg/kg (DU) 9.37 mg/kg (DU) 8.82 mg/kg (DU)

Arsenic 4.87 mg/kg (DU) 8.62 mg/kg (DU) 4.69 mg/kg (DU) 4.41 mg/kg (DU)

Cadmium 4.87 mg/kg (DU) 4.56 mg/kg (DU) 4.69 mg/kg (DU) 4.41 mg/kg (DU)

Cobalt 19.5 mg/kg (DU) 18.2 mg/kg (DU) 36.1 mg/kg (DU) 44.4 mg/kg (DU)

Manganese 22.3 mg/kg (D) 22.0 mg/kg (D) 20.3 mg/kg (D) 21.2 mg/kg (D)

Nickel 4.87 mg/kg (DU) 4.56 mg/kg (DU) 4.69 mg/kg (DU) 4.41 mg/kg (DU)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

Annual mass of sludge (dry basis) 

removed from scrubber (kg)

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

4,083,000 kg Lime Used
AL19069

4/26/2011

5/27/2011

6.9 mg/kg (DU)

3.45 mg/kg (DU)

13.8 mg/kg (DU)

202 ug/kg

3.45 mg/kg (DU)

6.9 mg/kg (DU)

3.45 mg/kg (DU)

3.45 mg/kg (DU)

13.8 mg/kg (DU)

19.7 mg/kg (D)

4.27 mg/kg (D)
Wet Scrubber Lime Injected Slurry

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP

Lines 1 thru 4 Air 

Control System

424200, 424220, 

424230, 424240 432001

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17843 AL17852 AL19040 AL19050

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011

Date(s) Analyzed 5/27/2011 5/27/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 0.027 mg/l (MBD) 0.144 mg/l (D) 0.02 mg/l (BDU) 0.02 mg/l (BDU)

Beryllium 0.02 mg/l (MDU) 0.02 mg/l (DU) 0.02 mg/l (DU) 0.02 mg/l (DU)

Chromium 0.84 mg/l (MD) 0.195 mg/l (D) 0.232 mg/l (D) 0.627 mg/l (D)

Hexavalent chromium 130 ug/l (D) 118 ug/l (D) 140 ug/ml (D) 131 ug/l (D)

Lead 0.040 mg/l (MD) 0.02 mg/l (DU) 0.02 mg/l (DU) 0.02 mg/l (DU)

Selenium 0.02 mg/l (MDU) 0.02 mg/l (DU) 0.02 mg/l (DU) 0.032 mg/l (D)

Arsenic 0.036 mg/l (MD) 0.02 mg/l (DU) 0.02 mg/l (DU) 0.028 mg/l (D)

Cadmium 0.0121 mg/l (MD) 0.005 mg/l (DU) 0.005 mg/l (DU) 0.005 mg/l (DU)

Cobalt 0.051 mg/l (MD) 0.02 mg/l (DU) 0.02 mg/l (DU) 0.02 mg/l (DU)

Manganese 1.560 mg/l (MD) 0.385 mg/l (D) 0.395 mg/l (D) 1.180 mg/l (D)

Nickel 0.191 mg/l (MD) 0.043 mg/l (D) 0.048 mg/l (D) 0.270 mg/l (D)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

Annual mass of sludge (dry basis) 

removed from scrubber (kg) See Lime Used

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits
AL19060

4/26/2011

5/27/2011

0.111 mg/l (D)

0.02 mg/l (DU)

0.325 mg/l (D)

101 ug/l (D)

0.02 mg/l (DU)

0.02 mg/l (DU)

0.02 mg/l (DU)

0.005 mg/l (DU)

0.02 mg/l (DU)

0.610 mg/l (D)

0.150 mg/l (D)
Wet Scrubber Blowdown

Facility Name and Address Unit Description Process Unit ID Control Device ID*

Century Aluminum of Kentucky GP

Lines 1 thru 4 Air 

Control System

424200, 424220, 

424230, 424240 432001

1627 State Route 271 North

Hawesville, KY 42348

Sample ID # AL17844 AL17853 AL19041 AL19051

Date Sampled 4/19/2011 4/20/2011 4/21/2011 4/25/2011

Date(s) Analyzed 5/27/2011 5/27/2011 5/27/2011 5/27/2011

HAP Metal

Antimony 0.034 mg/l (D) 0.02 mg/l (BDU) 0.028 mg/l (BD) 0.02 mg/l (BDU)

Beryllium 0.136 mg/l (D) 0.02 mg/l (DU) 0.168 mg/l (D) 0.041 mg/l (D)

Chromium 1.16 mg/l (D) 0.225 mg/l (D) 0.953 mg/l (D) 0.463 mg/l (D)

Hexavalent chromium 206 ug/l (D) 128 ug/l (D) 32.4 ug/ml (D) 122 ug/l (D)

Lead 0.381 mg/l (D) 0.214 mg/l (D) 0.419 mg/l (D) 0.145 mg/l (D)

Selenium 0.116 mg/l (D) 0.309 mg/l (D) 0.109 mg/l (D) 0.036 mg/l (D)

Arsenic 0.324 mg/l (D) 0.439 mg/l (D) 0.299 mg/l (D) 0.118 mg/l (D)

Cadmium 0.0988 mg/l (D) 0.005 mg/l (DU) 0.0842 mg/l (D) 0.0116 mg/l (D)

Cobalt 0.102 mg/l (D) 0.02 mg/l (DU) 0.112 mg/l (D) 0.033 mg/l (D)

Manganese 4.170 mg/l (D) 2.920 mg/l (D) 4.460 mg/l (D) 1.600 mg/l (D)

Nickel 4.44 mg/l (D) 2.580 mg/l (D) 3.980 mg/l (D) 1.390 mg/l (D)

* Enter multiple control device ID Nos. if the results apply to mulitiple control devices.

Annual mass of sludge (dry basis) 

removed from scrubber (kg)

B = Blank Contamination

D = Results Reported from Dilution

U = Non-detect at the reported detection limits

M = Matrix spike and/or matrix spike duplicate recovery outsideacceptance limits

See Wet Scrubber Sludge
AL19061

4/26/2011

5/27/2011

0.02 mg/l (BMDU)

0.065 mg/l (DM)

0.722 mg/l (MD)

147 ug/l (D)

0.202 mg/l (DM)

0.130 mg/l (MD)

0.211 mg/l (MD)

0.0174 mg/l (MD)

0.049 mg/l (MD)

2.200 mg/l (MD)

1.79 mg/l (MD)