NC0038377_Table 6-10 Vertical Hydraulic Conductivity of Undisturbed Soil_20150902

TABLE 6-10
VERTICAL HYDRAULIC CONDUCTIVITY OF UNDISTURBED SOIL SAMPLES
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ROXBORO, NC
Depth
Hydraulic
Sample ID
(feet BGS)
Conductivity
Sediment Type
Comment
(cm/sec)
From
To
Gray and brown fine
Residual saprolitic
ABMW-02
39.0
41.5
6.6 x 10-8
to medium sandy
schist directly below
clay
ash
$
Brown and gray fine
Residual soil directly
ABMW-03
40.0
42.0
2.5 x 10
sandy clay
below ash
ABMW-03
3.0
4.9
a
7.9 x 10
Gray silty fine to
Representative bottom
coarse sand
ash
Reddish brown fine
Background
MW-12
5.0
6.2
2.7 x 10'
sandy silt
soil/saprolite
upgradient of plant
Light gray fine sandy
Background saprolite/
MW-12
50.0
52.35
5
4.2 x 10
representative
silt
upgradient regolith
Gray and brown fine
Residual soil
MW-13
2.5
4.75
6
1.1 x 10
sandy silt
upgradient-west of ash
basin
Gray silty fine to
Downgradient alluvium
MW-16
5.0
6.65
6
8.5 x 10
coarse sand
in MW-16S screened
interval
s
Light brown fine
Residual soil/saprolite
SB-1
4.0
5.5
1.1 x 10
sandy clay
NW of ash basin
Brown silty fine to
Representative soil/fill
SB-7
0.3
2.8
5
1.0 X 10
medium sand
near toe of ash basin
dam
Notes:
BGS = below ground surface
cm/sec = centimeter per second
Prepared by: RBI Checked by: EMB
Revised by: EMB Rechecked by: JAW
Water level measurements used for these calculations were collected on June 17, 2015.
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