INNOVATIVE SOLUTIONS FOR DUKE ENERGY
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INNOVATIVE SOLUTIONS FOR DUKE ENERGY INNOVATIVE SOLUTIONS Advanced Wall Technologies, LLC
INNOVATIVE SOLUTIONS Advanced Wall Technologies, LLC
Background How it Could Work
On Sunday, February 2, 2014, Duke Energy employees Based on the new laws and the desire of Duke to do things
noticed coal ash waste was spilling from one of its coal ash more sustainable and green oriented in the future, Duke has
ponds into the Dan River near Eden, North Carolina. This an opportunity with industry partners to be a leader
spill trigged much debate on the proper handling of coal ash in concerning coal ash management. A potential partner solution
wet basins, both inactive and active facilities. would be to use the AWT system of encapsulation in every
facet of the strategic solution. Depending of physical
Following the Dan River coal ash spill, revelations that coal characteristics of each facility, Duke faces a myriad of
ash pollution has contaminated rivers, lakes, streams and choices, such as: to close ash ponds in place, relocate ash to
drinking water resulted in an unprecedented public demand another part of its property, convert the pond to dry storage, or
for action. Duke Energy produces an estimated 1.2 million ship ash out to a beneficial reuse project using different
tons of coal ash a year in North Carolina. It has been reported aspects of the AWT system. Compared to the solutions
by media that all coal ash sites have groundwater pushed by some groups, the AWT system allows for coal ash
contamination and nearly all are releasing contaminants into re-use, which benefits the environment and provides Duke
rivers, lakes or reservoirs. tremendous economic relief. There is no reason to have any
coal ash shipped out for straight disposal. Why use valuable
landfill space with a product that has tremendous value as
On August 20, 2014, the NC General Assembly passed S structural fill or re-use in everyday products, such as concrete
729, the Coal Ash Management Act of 2014. and bricks.
AWT believes that allowing engineering firms, material ash
The bill requires Duke Energy to phase out wet ash handling. management companies, and municipal or private landfill
Duke’s method of disposing of coal ash in ponds next to owners to try and piece together a solution is the wrong
waterways has led to concerns over water contamination approach. Duke needs to be in charge and should consider a
across the state. With the passage of this bill, all coal ash will global approach to manage the situation and deploy the
be covered by North Carolina’s solid waste laws. Further, proper technology and partners on a facility by facility basis to
when coal ash is used as fill to build up land for large reduce cost while balancing environmental needs.
construction projects, measures like groundwater monitoring
and liners will be required.
August 2014 Page 2
INNOVATIVE SOLUTIONS Advanced Wall Technologies, LLC
Duke Options (ranked by financial priority) AWT Innovative Solution
• ONSITE: Cap in Place
– Maintain proper hydrostatic barriers and create By utilizing the AWT technology, Duke
structure stability could use the coal ash “to fix itself”.
• ONSITE: Wet Basin to Dry Disposal By utilizing the AWT technology, Duke
Conversion could use the coal ash to convert the
– Creating a dry, lined disposal facility wet basin to a dry disposal facility.
• ONSITE: Creation of Dry Disposal By utilizing the AWT technology, Duke
Capacity could use the coal ash to create the dry
– Moving coal ash away from streams, rivers & wetlands disposal facility.
• OFFSITE: Utilize Large Scale By utilizing the AWT technology, Duke
Beneficial Use Fill Projects could control the solution outside their
– Providing coal ash as a fill material to current and facilities by “selling” their coal ash.
future beneficial use projects
• OFFSITE: Ship Offsite for Disposal AWT does not support this option.
August 2014 Page 3
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
Use your coal ash “to fix itself”.
Cap in Place SOLUTION
By converting to dry storage and combining AWT’s
encapsulated berm technology with standard capping
geosynthetic solutions, Duke could utilize a “hybrid cap”. The
hybrid cap will use the coal ash to construct a perimeter berm
extending well below the ground surface, creating a
hydrostatic barrier and natural buttress under the base of the
AWT berm system. Each section of the Hybrid Cap system
will extend to the middle of the basin, creating a pinwheel
structure.
• Perimeter embankment can be replaced with an AWT
ash-geosynthetic wall
• Can be located 50 to 75 feet inside of current CCR
“waste” boundary to allow future GW control methods
• AWT wall is a Subtitle D lined approach that also © 2014 AWT IP, LLC – Copying or reproduction of this drawing in
whole or part is strictly prohibited without prior permission of
addresses future EPA changes to CCR regulation AWT, LLC.
• A geomembrane option (GCL or 30-mil FML) is the PATENT No. 8,376,657, PATENT No. 8,430,600, PATENT No.
8,727,664, PATENT No. 8,784,008 & PATENTS PENDING – Some
preferred long term remedy for areas with groundwater or all of the technology illustrated in the drawing is covered by
impacts. one or more of PATENT No. 8,376,657, PATENT No. 8,430,600,
PATENT No. 8,727,664, PATENT No. 8,784,008, or pending US
• Innovative and Additional Cost Saving Option patent applications held or submitted by AWT IP, LLC.
August 2014 Page 4
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
Wet Basin to Dry SOLUTION Use your coal ash “to fix itself”.
Disposal Conversion
By using AWT’s encapsulated berm technology to convert the wet
basins to dry lined storage facilities provides Duke a better
environmental and cost effective solution. The creation of a lined
disposal footprint, constructed in phases, could include ALL
material at the facility. This would result in an ultimate “clean”
closure and removal of potential source material from the basins. If
clean closure is chosen, the amount of dirt needed to fill from
below the ground water could be obtained from the dirt berms
around the basins and therefore minimize cost and make the
option more feasible to everyone. with standard capping
geosynthetic solutions.
• Can allow basin to be converted to dry disposal while basin
can function until transition complete.
• Maximize ash for use in the AWT berm construction to
therefore shrink the overall footprint of the constructed landfill
• AWT berm or curtains constructed through basin.
• AWT berm constructed with removed ash around perimeter. © 2014 AWT IP, LLC – Copying or reproduction of this drawing in
whole or part is strictly prohibited without prior permission of
AWT, LLC.
• Composite liner installed using additional geogrid
underlayment. PATENT No. 8,376,657, PATENT No. 8,430,600, PATENT No.
8,727,664, PATENT No. 8,784,008 & PATENTS PENDING – Some
• Innovative and Additional Cost Saving Option or all of the technology illustrated in the drawing is covered by
one or more of PATENT No. 8,376,657, PATENT No. 8,430,600,
PATENT No. 8,727,664, PATENT No. 8,784,008, or pending US
patent applications held or submitted by AWT IP, LLC.
August 2014 Page 5
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
Use your coal ash “to fix itself”.
Creation of Dry Disposal Capacity SOLUTION
By using AWT’s encapsulated berm technology to create dry
lined storage facilities provides Duke a better environmental
and cost effective solution while keeping liability onsite.
• Moves liability away from Dan River (in this example)
• Keeps liability onsite instead of trucking to multiple locations
• Maximizes Onsite Capacity
• Minimizes Permitting Timelines
• Minimizes Unit/Cost per Disposal Cubic Yard compared to
trucking offsite
• Allows ash to be safely and reliably re-used in berms greatly
reducing costs safely and effectively.
• Innovative and Additional Cost Saving Option
© 2014 AWT IP, LLC – Copying or reproduction of this drawing in
whole or part is strictly prohibited without prior permission of
AWT, LLC.
PATENT No. 8,376,657, PATENT No. 8,430,600, PATENT No.
8,727,664, PATENT No. 8,784,008 & PATENTS PENDING – Some
or all of the technology illustrated in the drawing is covered by
one or more of PATENT No. 8,376,657, PATENT No. 8,430,600,
PATENT No. 8,727,664, PATENT No. 8,784,008, or pending US
patent applications held or submitted by AWT IP, LLC.
August 2014 Page 6
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
Use your coal ash “to fix itself”.
Utilize Large Scale SOLUTION
Beneficial Use Fill Projects
AWT’s technology/method allows for the beneficial reuse of
certain materials in the wall construction, dramatically
decreasing or eliminating the financial burden of the
construction. The delivery cost of Duke’s coal ash can be
negotiated downward by “sharing” in the overall construction
savings by the facility.
• Significantly reduces project costs to the end-user.
• Duke can “partner” with project end-user, participating in the
cost savings.
• Allows for established area landfills, capacity constrained, to
take large volumes of beneficial reuse materials (ash).
• Minimizes Unit/Cost per Disposal Cubic Yard compared to
straight offsite disposal.
• Allows ash to be safely and reliably re-used
in berms greatly reducing costs safely and effectively.
• Innovative and Additional Cost Saving Option
August 2014 Page 7
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
How Does it Work? Partial Encapsulation, PETERSBURG, VA
• Utilize coal ash as a beneficial waste material in
berm construction.
• Encapsulation keeps water out.
• Patented technology delivered in many forms.
Waste
S. Fill Product
Full Encapsulation, CHESTER, VA
AWT Patented Technology
August 2014 Page 8
INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
The Inner Workings
AWT Patented Technology
August 2014 Page 9INNOVATIVE SOLUTIONS
Advanced Wall Technologies, LLC
Unlike traditional MSE berms, the AWT MSE berm has an internal geomembrane envelope that
completely encapsulates the fill material. Advantageously, this encapsulation enables the use of
beneficial reuse material as fill material. It is also effective in limiting the risk of seismic events. This
allows for utilities to increase dry disposal capacity at a cost generally less expensive than new facility
construction.
Besides the overwhelming financial advantages, the AWT MSE Berm System has environmental
advantages also;
– The AWT system is a GREEN option. 99.7% of the AWT MSE Berm System is constructed with recycled fill
materials These beneficial use materials such coal combustion products - CCP’s (fly ash, bottom ash,
synthetic gypsum, boiler slag), Incinerator ash, Non-hazardous impacted soils of all types, foundry sands,
properly de-watered and stabilized dredge material, crushed concrete, crushed glass, drill cuttings, and
other reclassified waste materials. AWT supports recycling and RESPONSIBLE Re-Use.
– The AWT system is a SAFER option then a traditional MSE Berm. The main reason is that the
encapsulated AWT MSE Berm System provides liquid/pore pressure management proactively by removing
liquids via patented drainage system. No liquids = No liquefaction!
AWT prides itself on the ability to configure the berm system (using its vast design portfolio) to meet
certain facility constraints. For example, if the facility has soft base grades or streams, wetlands or
marsh areas adjacent to MSE berm, a group of the AWT designs deal with this by extending the
encapsulation well below the base grade providing a firm foundation, a natural buttress and a
hydrostatic barrier.
August 2014 Page 10You can also read
