In accordance with OEPA regulations and facility phasing
plans, the landfill must be closed with an impermeable cap
which is constructed on top of final grades, after waste
is placed up to the permitted waste grades. Final cover
grades within the landfill is limited to a maximum slope
of 3 horizontal to 1 vertical (3H: 1V) waste slopes grading
into a five percent (5%) slope at a maximum top elevation.
Several alternative BAT designs for
capping systems exist. A typical capping system includes:
All final slope surfaces are re-vegetated for long-term
protection. Areas are revegetated for long-term erosion
protection in order to:
Other components of the final capping system
include installation of downslope channels, final diversion
berms, rock channels and other surface management ancillary
components in accordance with American Landfill's engineering
design.
The Ohio EPA regulations require that solid
waste disposal facilities maintain a financial assurance instrument
such as bonds or certificate of insurance to adequately fund
the closure and post-closure maintenance and monitoring of
the site. The post-closure period is 30 years after closure
is completed and certified by the OEPA. The OEPA also requires
the facilities to adjust the closure and post-closure cost
if there is an increase or decrease in disposal area. In addition,
these closure and post-closure funds are adjusted on an annual
basis to reflect cost increases due to inflation.
For American Landfill, the cost of this insurance
is submitted to the OEPA and the Stark County Health Department
each year.
