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Emissions

Allen Fossil Plant

What TVA is doing about emissions at Allen

TVA has taken a number ofsteps to make the efficient generation of power at

Allen as clean as possible:

The plant is equipped with electrostatic precipitators that capture ash from

the burning coal.

The use of low-sulfur coalfrom the western United States limits emissions of

sulfur dioxide.

A technology called overfire air limits the production of nitrogen oxides that

contribute to the formation of ozone and acid rain. This technology involves

modifications that reduce the oxygen available to form nitrogen oxides in the

furnaces’ combustion zones.

All three coal units at Allen operate selective catalytic reduction systems

reducing nitrogen oxide emissions by up to 90 percent.

In support of recent environmental agreements and its vision of being one of

the nation's leading providers of low-cost and cleaner energy by 2020, TVA

will installscrubbers on or retire the Allen coalfired units no later than

December 31, 2018.

Allen combustion turbines burn low emitting natural gas or ultra-low sulfur

fuel oil.

Sulfur dioxide

See raw data for this chart

Additional historical emission data for combustion turbines will be added when it becomesavailable.

*Data includes31 tons from 2000 to 2012 for units that produce less than 25 megawattsand are not

required to be reported to the Environmental Protection Agency.

View more information on sulfur dioxide and what TVA is doing about it.

Nitrogen oxides

Emissions by plant

Allen

Brow nsville

Bull Run

Caledonia

Colbert

Cumberland

Gallatin

Gleason

John Sevier

Johnsonville

Kemper

Kingston

Lagoon Creek

Magnolia

Marshall

Paradise

Shaw nee

Southaven

Widow s Creek

Other sites

Emissions by type

Carbon Dioxide

Nitrogen Oxides

Ozone

Sulfur Dioxide

Greenhouse Gases

Toxics Release Inventory

(TRI)

Tennessee Valley Authority

Years

Sulfur Dioxide Emissions (Tons)

Coal Combustion Turbines*

1980 1990 2000 2010

0k

25k

50k

75k

100k

125k
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See raw data for this chart

Additional historical emission data for combustion turbines will be added when it becomesavailable.

*Data includes80 tons from 2000 to 2012 for units that produce less than 25 megawattsand are not

required to be reported to the Environmental Protection Agency.

View more information on nitrogen oxides and what TVA is doing about them.

Carbon dioxide

See raw data for this chart

Additional historical emission data for combustion turbines will be added when it becomesavailable.

*Data includes141,165 tons from 2000 to 2012 for units that produce less than 25 megawattsand are not

required to be reported to the Environmental Protection Agency.

View more information on carbon dioxide and what TVA is doing about it.

Toxics Release Inventory

2012 data

All amounts are in pounds

Chemical Air Water Land Off-Site

Disposal

Total

Hydrochloric Acid

(aerosol)

120,000 0 0 0 120,000

Hydrogen Fluoride 120,000 0 0 0 120,000

Sulfuric Acid (aerosol) 5 0 0 0 5

Ammonia 105,000 92 0 0 105,092

Antimony Compounds

Arsenic Compounds

Years

Nitrogen Oxide Emissions (Tons)

Coal Combustion Turbines*

1980 1990 2000 2010

0k

10k

20k

30k

40k

50k

Years

Carbon Dioxide Emissions (Tons)

Coal Combustion Turbines*

1995 2000 2005 2010

0M

2M

4M

6M

8M
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Barium Compounds 10,030 16,000 550,000 560,004 1,136,034

Beryllium Compounds

Cadmium Compounds

Chromium Compounds

Cobalt Compounds

Copper Compounds 311 2,600 13,000 24,000 39,911

Lead Compounds 250 0 2,200 11,002 13,452

Manganese Compounds 619 0 23,000 21,000 44,619

Mercury Compounds 160 1 9 46 216

NickelCompounds

Selenium Compounds

Silver Compounds

Thallium Compounds

Vanadium Compounds 391 2,300 18,000 19,000 39,691

Zinc Compounds 971 2,500 7,700 18,000 29,171

Benzo(g,h,i)perylene 0 0 0 0 0

Naphthalene 28 0 0 0 28

Nitrate Compounds

Dioxin (grams) 1 0 0 0 1

Polycyclic Aromatic

Compounds

14 0 7 1 22

Hydrazine

Total 357,780 23,493 613,916 653,052 1,648,241

Gross MWh Generated: 4,482,160

Pounds Released per MWh: 0.368