NC0001422_Table 6-1 Input Parameters and values for Convective-Dispersive Flow Equation_20160201

TABLE 6-1
INPUT PARAMETERS AND VALUES FOR CONVECTIVE -DISPERSIVE
FLOW EQUATION BASED UPON L.V. SUTTON DATA
L.V. SUTTON ENERGY COMPLEX
DUKE ENERGY PROGRESS, LLC, WILMINGTON, NC
Parameter
Nomenclature
Value
Source of Value
Began Sluicing Ash
-
1971
CSA
Ceased Sluicing
-
2013
CSA
Duration of Source
t°
43 years
Calculated
Term
Source
3950 boron;
Mean values from CSA,
Concentration (Ng/L)
cO
328 arsenic
Table 7-7
Background
Ci
95 boron;
CAP Part 1, Table 2-8
Concentration (Ng/L)
6.8 arsenic
Hydraulic
Geomean of lower and
Conductivity
k
23,800
upper surficial
(ft/yr)
conductivities CAP Part 1,
Table 3-2*
Average of gradients
Hydraulic Gradient
i
0.00033
unaffected by basin mound
CAP Part 1, Table 3-3
Effective Porosity
ne
0.3
Average typical value
Seepage Velocity
v,=ki/ne
26
Calculated
(ft/yr)
Dispersivity (ft)
a
20
0.01*2000
Dispersion (ft2/yr)
D = av,
520
Calculated
Distribution
0, 1, 2 for
Falta et al. used 0 for
Coefficient (mL/g)
Kd
boron and 9
Boron; 1 and 2 were added
for arsenic
for comparison only
Time from
To capture the length of
Introduction of
t
Varies
plume
Constituent (yrs)
Distance from Ash
Basin Boundary to
x
250/5280**
Measured
Cooling Pond (ft)
Calculated
c(x,t)
As shown
Calculated
Concentration (Ng/L)
Prepared By: KDB Checked By: DGN
*Constituent movement is primarily in the surficial unit.
**The model considered discharge to the west toward the cooling pond (250 feet) as well as to the west toward the Cape
Fear River floodplain (approximately 5280 feet or 1 mile)
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