Duke_MarshallSteamStation_FGD_SWMP2010

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November 23, 2010
Ms. Deb Aja, Western District Supervisor
North Carolina Department of Environment and Natural Resources
Division of Waste Management
2090 U.S. Highway 70
Swannanoa, NC 28778
RECEIVED
NOV 2 9 2010
SOLID WASTE SECTION
ASHEVILLE REGIONAL OFFICE
Reference: WASTE MANAGEMENT PLAN
Marshall Steam Station Flue Gas Desulfurization (FGD) Residue Landfill
Phase 1, Cell 1, Permit No. 18-09
Catawba County, North Carolina
S&ME Project No. 1411-09-097
Dear Ms. Aja:
On behalf of Duke Energy (Duke), S&ME, Inc. submits this Ten Year Waste Management Plan
for the Marshall Steam Station Flue Gas Desulfurization (FGD) Residue Landfill (Permit No. 18-
09) as required by GS 130A-309.09D.
If there are any questions regarding this report, please contact me at 828-687-9080, Ext. 315.
Sincerely,
S&ME, Inc.
A, I ' 4v" ,
William M. Miller, PE
Senior Project Engineer
S:\2009 PROJECTS\1411\ENVIRONMEN AL PROJECTS\I 109 097 Duke Energy Environmental Engineering$ervices\Triennial Waste Reduction Plans to
DENR-Oct 2010\2010 Plans\MSS FGD\MSS FGD LF Industrial Waste Landfill Waste Management Plan.doc
S&ME, INC. / 44 Buck Shoals Road, Unit C-3 / Arden, NC 28704 / p 828.687.9080 f 828.687.8003 1 www.smeinc.com

Waste Management Plan S&ME Project 1411-09-097
Marshall Steam Station November 23, 2010
FGD Residue Landfill Permit 18-09
cc:
Duke Energy
PO Box 1006
Charlotte, NC 28201-1006
Attn: Andy Tinsley, Mail Code EC13K
Duke Energy
Marshall Steam Station
8320 East Highway 150
Terrell, NC 28682
Attn: Donna Burrell, Environmental Coordinator
Duke Energy
PO Box 1006
Charlotte, NC 28201-1006
Attn: Ed Sullivan, PE, Mail Code EC13K

Waste Management Plan
Marshall Steam Station
FGD Residue Landfill Permit 18-09
S&ME Project 1411-09-097
November 23, 2010
Facility Name Marshall Steam Station Flue Gas Desulfurization (FGD)
Residue Landfill Phase 1, Cell 1
Permit # 18-09
Location Catawba County
Permit Issuance Date November 21, 2006. The permit is subject to review
every five years.
Waste Manaeement Plan Period
Phase 1, Cell of the landfill has a design capacity of 608,472 tons based on a five (5)
year planning period. The landfill was designed to receive 288,800 tons of waste per
year (950 tons per day for 304 operating days per year). As the landfill is designed for a
capacity of five (5) years at the design waste loading, the period of the Waste
Management Plan presented is for a five year period.
Once the design capacity of the landfill is reached, the landfill will be closed and the
wastes placed in this landfill will be disposed in the Marshall Industrial Landfill #1,
Permit No. 18-12.
Description of Waste Disposed in Landfill
The landfill receives the following types of material:
- Marshall generated gypsum
- Marshall generated clarifier sludge
- Marshall generated flyash
- Marshall generated bottom ash
- Marshall generated C&D debris (see approved C&D-next page)
- Duke Energy Carolinas generated asbestos
- Plant Allen generated gypsum
- Plant Allen generated clarifier sludge
- Cliffside generated gypsum
- Cliffside generated clarifier sludge
- Marshall Mill Rejects (Pyrites)

Waste Management Plan S&ME Project 1411-09-097
Marshall Steam Station November 23, 2010
FGD Residue Landfill Permit 18-09
Exuected Annual Waste Ouantities For Five year Phase
The expected annual quantities of waste to be placed in the landfill are 288, 800 tons per
year. This is based on design waste receipts of 950 tons per day for 304 operating days
per year. The quantities are indentified as actual or expected.
The yearly periods listed below correspond to the period July 1 through June 30 for the
respective year.
Year
Period
Actual or Expected Annual Quantity
Year 1
2006-2007
2,548 tons Actual
Year 2
2007-2008
22,273.96 tons (Actual)
Year 3
2008-2009
30,937.12 tons Actual
Year 4
2009-2010
125,032.39 tons (Actual)
Year 5
2010-2011
288,800 tons (Expected)

Waste Management Plan
Marshall Steam Station
FGD Residue Landfill Permit 18-09
S&ME Project 1411-09-097
November 23, 2010
Expected Years of Disposal Capacity
Phase 1, Cell I of the landfill has a design capacity of 608,472 tons for a five year
planning period. The landfill was designed to receive 288,800 tons of waste per year
(950 tons per day for 304 operating days per year).
As of June 30, 2010 the landfill had received 180,791.47 tons of material. The remaining
capacity of the landfill is calculated below:
608,472 tons Phase 1, Cell 1 Design Capacity
-180.791 tons Waste Placed through June 30, 2010
427,681 tons Phase 1, Cell 1 Remaining Capacity
Using the placement rate of 288,800 tons per year, the expected years of disposal
capacity is calculated as follows:
Years of Disposal Capacity at Expected Annual Rate
427,681 tons RemaininE Capacity =1.5 Years of Disposal Capacity
288,800 tons/year Expected Annual Quantity
The largest component of waste received by the landfill is gypsum produced by the FGD
system. This material is produced at a fairly constant rate. This material is utilized in
wallboard unless the market conditions for wallboard do not produce sufficient demand.
Gypsum material not used by the wallboard manufacturer is disposed in the landfill. For
example, in the July 1, 2008 to June 30, 2009 period 30,937.12 of tons of gypsum were
disposed in the landfill. With depressed market demand for wallboard during the period
July 1, 2009 to June 30, 2010, 125,032.39 tons were disposed in the landfill.
Years of Disposal Capacity at 2009-2010 Annual Rate
427,681 tons Remainina Capacity = 3.4 Years of Disposal Capacity
125,032 tons/year (2009-2010 Annual Rate)

Waste Management Plan S&ME Project 1411-09-097
Marshall Steam Station November 23, 2010
FGD Residue Landfill Permit 18-09
Options for Manaeement and Reduction of Wastes
The largest component of waste received by the landfill is gypsum produced by the FGD
system. The quantity of material produced is determined by the sulfur content of the coal
burned to generate electricity and by how much electricity is generated by the station.
Duke considers the sulfur content of coal when arranging fuel purchase contracts.
Marshall generates 2090 MW of electric power by combustion of coal, enough electricity
to power over one and a half million homes. As the second largest coal facility owned by
Duke Energy in the Carolinas, Marshall generates electricity, consuming coal and
producing gypsum, on a continual basis.
Duke continues to diversify the mix of fuels it uses to generate electricity by making
significant investments in renewable energy projects. In addition to solar, wind, and
other renewables, Duke is testing the use of biomass mixed with coal at some of its
traditional all -coal fired power plants.
The landfill was designed to receive 288,800 tons of waste per year. The use of the
gypsum material in wallboard has resulted in a reduction of material placed in the landfill
as calculated below:
1,155,200 tons
Design Waste Placement for Years 2006-2010
-180,791 tons
Waste Placed 2006 through June 30, 2010
974,409 tons
Waste Reduction Through Use in Wallboard
Waste Manazement Strateev
— Plans for Waste Reduction and Disnosal
Duke's plans for waste reduction for the FGD landfill are that an improving regional
economy will increase the demand for gypsum, resulting in the use of this material as a
wallboard product. Duke's By -Products Management Group was developed by Duke to
seek markets and applications for use of coal combustion by products. This group
continuously works toward maximizing the use of coal combustion by products, such as
gypsum.
Duke's plans for disposal for the 5 year period (2006 — 2011) are:
• Continue to place material in Phase I, Cell 1 until capacity of this cell is reached.
• At completion of Phase I, Cell 1, the wastes will be placed in the Marshall Steam
Station Industrial Landfill No. 1, Permit No. 18-12, currently under construction.
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