Coal Combustion Waste Management at - DOE - Fossil Energy ...

TABLE 27 (Cont.)
Variance Request State
To allow the use of conditioned fly
ash as an alternative daily cover
rather than at least 6 in. of clean soil,
as the regulations specify.
To allow the use of conditioned fly
ash as an alternative daily cover
rather than at least 6 in. of clean soil,
as the regulations specify. e
To allow the use of conditioned fly
ash as an intermediate cover rather
than 1 ft of compacted clean soil
material, as required by the
regulations. e
To waive the intermediate cover
otherwise required by the regulations.
a These variances are for the same unit.
61
Granted or
Rejected Granting/Rejection Rationale
accomplishes this better than the composition specified in the
regulations. In addition, Poz-O-Tec in this coal combustion
by-product monofill leaches significantly less toxic
constituents than materials in a municipal landfill, which is the
landfill type to which the regulations were intended to apply. If
vegetation is not established to the satisfaction of the State,
soils specified in the regulation will be required.
IL Granted The daily cover regulations allow alternative materials or
procedures as long as they meet the same standards of
performance as 6 in. of soil. Data included in the permit
application included an analysis of the conditioned fly ash and
a description of its properties to demonstrate that, when
hardened, it is an even better sealant than the standard 6 in. of
soil. The permit specifies that the conditioned fly ash must be
used in compliance with the way its use was described in the
permit application.
IL Granted State regulations allow flexibility in cover design, as long as
the alternative can meet the same performance standard as the
design specified in the regulations. Data included in the permit
application included an analysis of the conditioned fly ash and
a description of its properties to demonstrate that, when
hardened, it is a better filter than the standard 6 in. of soil.
IL Granted State regulations allow flexibility in cover design, as long as
the alternative can meet the same performance standard as the
design specified in the regulations. Data included in the permit
application included an analysis of the conditioned fly ash and
a description of its properties to demonstrate that, when
hardened, it is a better filter than the standard 12 in. of soil.
IN Granted,
with
stipulations
b These are two separate units in two separate locations.
c These are two separate units in two separate locations.
d These variances are for the same unit.
e These variances are for the same unit.
Almost 90% of the materials disposed of at the landfill are wet
FGD sludge. The company’s landfill operating plan, which was
the basis for the variance request and which was approved by
the regulatory agency, requires compacting and curing of
stabilized sludge to minimize wind and water erosion and
fugitive dust generation, and it also requires plant water trucks
to moisten surfaces where vehicular dust may be generated.
Variance can be revoked if there is a documented violation of
the requirement to maintain sediment control structures and
drainage ditches or documented evidence that fugitive dust is
creating a nuisance.