Alcoa Wenatchee Works

Performance Test Results

MACT Reporting Period January through December 2010

Potline 1 - Total Fluoride

Roof 

Reactor Rolling Vent

A398 Results Average Results Line Total

Reactor Lbs TF / Lbs TF / Roof Vent Lbs TF / Lbs TF /

Date Number Test Method ton AL ton AL Location Test Method ton AL ton AL

January 5, 2010 161-7 Alcoa 4074-TF 0.0680 0.091 Room 6 Method 14 / 4075 TF 1.543 1.634

Feb-10 0.090 Room 6 Method 14 / 4075 TF 1.730 1.820

Mar-10 0.092 Room 6 Method 14 / 4075 TF 1.365 1.457

1st Quarter 10

April 7, 2010 161-3 Alcoa 4074-TF 0.0278 0.087 Room 6 Method 14 / 4075 TF 1.142 1.229

May-10 0.087 Room 6 Method 14 / 4075 TF 1.193 1.280

Jun-10 0.089 Room 6 Method 14 / 4075 TF 1.382 1.470

2nd Quarter 10

July 7, 2010 161-9 Alcoa 4074-TF 0.0403 0.092 Room 6 Method 14 / 4075 TF 1.678 1.770

Aug-10 0.090 Room 6 Method 14 / 4075 TF 1.612 1.702

Sep-10 0.089 Room 6 Method 14 / 4075 TF 1.518 1.607

3rd Quarter 10

October 6, 2010 161-8 Alcoa 4074-TF 0.0173 0.038 Room 6 Method 14 / 4075 TF 1.776 1.813

Nov-10 0.037 Room 6 Method 14 / 4075 TF 1.568 1.605

Dec-10 0.037 Room 6 Method 14 / 4075 TF 1.591 1.628

4th Quarter 10
Alcoa Wenatchee Works

Performance Test Results

MACT Reporting Period January through December 2010

Potline 5 - Total Fluoride

Roof 

Reactor Rolling Vent

A398 Results Average Results Line Total

Reactor Lbs TF / Lbs TF / Roof Vent Lbs TF / Lbs TF /

Date Number Test Method ton AL ton AL Location Test Method ton AL ton AL

January 5, 2010 GTC Outlet Alcoa 4074-TF 0.099 0.141 Room 20 Method 14 / 4075 TF 1.400 1.541

Feb-10 0.140 Room 20 Method 14 / 4075 TF 1.289 1.429

Mar-10 0.138 Room 20 Method 14 / 4075 TF 1.065 1.203

1st Quarter 10

April 6, 2010 GTC Outlet Alcoa 4074-TF 0.114 0.124 Room 20 Method 14 / 4075 TF 0.789 0.913

May-10 0.125 Room 20 Method 14 / 4075 TF 0.993 1.118

Jun-10 0.126 Room 20 Method 14 / 4075 TF 1.075 1.200

2nd Quarter 10

July 8, 2010 GTC Outlet Alcoa 4074-TF 0.171 0.124 Room 20 Method 14 / 4075 TF 1.069 1.193

Aug-10 0.126 Room 20 Method 14 / 4075 TF 1.026 1.152

Sep-10 0.127 Room 20 Method 14 / 4075 TF 1.203 1.330

3rd Quarter 10

October 6, 2010 GTC Outlet Alcoa 4074-TF 0.116 0.126 Room 20 Method 14 / 4075 TF 1.508 1.634

Nov-10 0.122 Room 20 Method 14 / 4075 TF 1.752 1.874

Dec-10 0.125 Room 20 Method 14 / 4075 TF 1.752 1.877

4th Quarter 10
Alcoa Wenatchee Works

Performance Test Results

Baking Furnace 

MACT Reporting Period January through December 2010

Baking Furnace - Total Fluoride(TF) and Polycyclic Organic Matter (POM)

A446 Results Results Production

Reactor Lbs TF / Lbs POM's / US 

Date Number Test Method ton GAB Test Method ton GAB Tons DSCFM Comments

January 4, 2010 A446 - 4 Alcoa 4075-TF 0.0008 EPA M-315 0.0153 4855.9 66,548 Normal ore flow; 2 of 4 reactors running

Feb-10

Mar-10

1st Quarter 10

Apr-10

May 5, 2010 A446 - 1 Alcoa 4075-TF 0.0023 EPA M-315 0.0313 5056.4 59,298 Normal ore flow; 2 of 4 reactors running

Jun-10

2nd Quarter 10

Jul-10

Aug-10

Sep-10

3rd Quarter 10

October 5, 2010 A446 - 2 Alcoa 4075-TF 0.0005 EPA M-315 0.0373 4929.7 59,774 Normal ore flow; 2 of 4 reactors running

Nov-10

Dec-10

4th Quarter 10

MACT limits: TF - 0.20 lbs / ton GAB

POM - .18 lbs / GAB