CCRs defined by EPA as Slag, Bottom Ash, Fly Ash and FGD Gypsum

They are generated by the COMBUSTION of COAL in power plants and the collection of the RESIDUALS by plant equipment and air pollution control devices.

Located on Tampa Bay at Apollo Beach

Unit 1 operation in 1970

Unit 2 operation in 1973

Unit 3 operation in 1976

Unit 4 operation in 1985

Approximately 1900 MW generating capacity

Slag – From boiler drops into hoppers, ground and sluiced to dewatering bins

FGD Gypsum – From scrubber to slurry tanks to filter press and drier, to loadout or storage.

Fly Ash – From precipitator to ash hoppers and bins. Then to Separation Technologies for beneficiation & sale.

Bottom Ash (slag) – From boiler to hoppers to ponds for loadout.

Economizer Ash – From boiler to economizer to hoppers to ponds for disposal.

1970, 1973,1976 – Slag & Fly Ash (Units 1-3)

1985 – Gypsum, Bottom Ash, Economizer Ash (Unit 4)

2000-2003 – Gypsum from Units 1-3

2007-2010 – SCRs result in ammoniated ash

2008 – Separation Technologies begins ash treatment

Slag Dewatering Bins - 2008

Separation Technologies Ash Treatment – 2008

Double Lined Gypsum Storage Areas – 2015

Economizer Ash Pond Closure - 2018

TECO produces an average of 900,000 tons/year of CCRs and sells >95%.

This CCR recycling rate is one of the highest overall in the U.S.

All Big Bend CCR storage units are lined.

Storage areas for beneficial use of Big Bend gypsum and bottom ash are not regulated under the federal CCR rule.

TECO currently complying with all operational requirements of federal CCR Rule (incl. Inspections, Emergency Action Plans & Groundwater Monitoring).

By-Product Beneficial Use

Gypsum Dry Wall, Fertilizer, Cement

Slag Roofing Material/Gritblasting

Bottom Ash Cement

Fly AshCement, Concrete, Flowable Fill

Avoids environmental impacts of disposal.

Avoids consuming valuable landfill space.

Creates usable products in commerce.

Creates jobs.

Improves quality of some products.

Ash in concrete offsets carbon emissions (Approx. 7 million tons since 1991).

Reduces impacts of producing or mining virgin materials.

2016 Beneficial Reuse (Big Bend and Polk)

Product Tons Produced Tons Disposed Tons Sold % Reused

BB Slag 40,179 3,969 36,210 87%

BB Bottom Ash 16,645 0 16,645 100%

Fly Ash 204,469 11,786 192,683 94%

Gypsum 650,043 27,167 622,876 96%

Total 911,336 42,922 868,414 95%