POWER October 2011 - 82

COAL ASH MANAGEMENT
3. The landfill's layout. The CCB landfill site features side slopes at 2:1 extending 60
feet vertically. Crews deploy liner from the top to the bottom of the cell floor. Once in place and
shingled properly to ensure free drainage from panel to panel, fusion welding commences.
Courtesy: Photography by David Starling of CPSGI
protection of natural resources by integrating
erosion and sediment (E&S) controls
with SWM practices, minimizing site
imperviousness, taking advantage of the
natural hydrology, and implementing the
use of smaller controls to capture and treat
stormwater closer to the source.
For monitoring during and after CCB
placement, the site is surrounded by six
perimeter groundwater monitoring wells.
An active groundwater monitoring plan
requires semi-annual sampling to document
groundwater quality, to demonstrate
that the background groundwater quality is
not affected by present operations on the
property, and to record groundwater quality
directly downgradient of the limits of
CCB placement. Groundwater levels in the
wells are monitored monthly.
Long-term engineering design includes
4. Installing the liner. Crews complete the installation of a 60-mil textured HDPE liner
at the site of the future CCB landfill in Maryland. Upon installation, welds are tested for their
conformance with the technical specifications by third-party testing. The test must be submitted
for approval to third-party construction quality assurance personnel and the MDE. Courtesy:
Photography by David Starling of CPSGI
the development of future cells and the
installation of mechanically stabilized
earthen walls for the environmental conservation
of existing wetlands located onsite.
The landfill is expected to accommodate
approximately 7 million tons of CCBs
over a projected lifespan of 22 years.
" The design of this project incorporates
the environmental criteria which will
be the standard for next-generation CCB
landfills, " said Bobby Raia, Charah's project
coordinator. " As we move forward with
the design and permitting associated with
the development of future cells and the
overall landfill expansion, we will continue
to provide innovative and environmentally
beneficial solutions to CPSGI. "
5. Successful teamwork. Charah President and CEO Charles Price (left) and CPSGI President
John Long discuss the 60-mil textured HDPE liner used at the CCB landfill called " Lot 15. "
Courtesy: Photography by David Starling of CPSGI
Current Project Status
With several years of evaluation, design
and engineering, and permitting completed,
approval was granted by the MDE for
the first two of six cells. In March, Charah
began construction of the new CCB landfill,
which is expected to take between eight
and 10 months to complete. Construction
efforts include the excavation of more than
1,000,000 cubic yards of clay, the deployment
of nearly 12 acres of HDPE liner, and
installation of the leachate collection system
(Figures 3 and 4).
Charles Price, Charah's president and
CEO, added that " the uniqueness of this
project not only lies in the site's characteristics
and design but also in the partnership
between CPSGI and Charah. Our
involvement from the beginning of this
project, starting with site selection, has
forged a knowledgeable, trustworthy, and
transparent relationship with CPSGI. "
Charah expects to begin placement of
CCB material in the initial cell by October
2011 (Figure 5).
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