SW6191102_McPhail Meadows soilrpt-REVISED_3/24/2020

Southeastern Soil & Environmental Associates, Inc.
P.O. Pox 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email mike &soutneasternsoil.com
March 16, 2020
Mr. Jeff Wright
Southeastern Construction of Rockfish
771 Bostic Road
Raeford, NC 28376
Re: Hydraulic conductivity (permeability) analysis & Seasonal High -Water Table
determination (SHWT) for proposed stormwater control areas, McPhail Meadows
Subdivision, off Pittman Grove Church Road, Hoke County, North Carolina
Dear Mr. Wright,
An evaluation of soil properties and hydraulic conductivity (Ksat) has been conducted at
your request on portions of the aforementioned property (see attached map by Hilliard
Engineering, PLLC). The purpose of the investigation was to determine soil water table
depths (SHWT) based on soil profiles at 5 locations on the subject property Hilliard
Engineering specified. In addition, Ksat was to be provided at varying depths (Hilliard
Engineering specified) for use with stormwater retention basin design.
Saturated hydraulic conductivity of the unsaturated zone was measured in a similar
method as described in the Soil Science Society of America Journal, Vol. 53, no 5, Sept. -
Oct. 1989, "A Constant Permearneter for Measuring Saturated Hydraulic Conductivity of
the Vadose Zone" and Comparison of the Glover Solution with the Simultaneous
Equations Approach for Measuring Hydraulic Conductivity." This consists of advancing
a small diameter bore hole to a predetermined depth. At this depth, a constant head
(pressure) was established and maintained. Flow measurements were made at timed
intervals after flow stabilized.
Soils at tested sites TS 2, TS 3 and TS 6 are most similar to the Wagram soil series.
Soils at tested sites TS 8 and TS 9 are most similar to the Rains soil series (see attached
boring logs). Five borings were advanced to at least 4.0 feet below the soil surface.
Seasonal High -Water Table (SHWT) as determined by evidence of colors of chrome 2 or
Iess (and/or concentrations of high redox )mottles) was encountered at depths ranging
from 0 to 56 inches below the ground surface (see chart attached).
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Five compact constant head permeameter (CCHP) tests were conducted at varying
depths. The measured Ksat rates ranged from 0.51 to 7.98 cm/hr (equivalent to 0.20 to
3.14 inches/hour).
The attached map shows locations of the sample points as well as Ksat locations.
It should be noted that the reported SHWT does not necessarily reflect the elevation of
static groundwater (due to variations in groundwater recharge rates, annual rainfall,
drought conditions, etc.).
The data presented in this report are limited by a number of considerations. The primary
consideration is that soil formations can be highly variable. The soils found on this site
can be subject to inclusions of other soil types, perched water, artesian conditions and/or
layers of undulating low permeability clay seams. These and other soil conditions can
have an effect on the steady state of groundwater flow. To the extent possible, we have
identified the soil types that will impact the flow of groundwater, and have provided a
professional opinion as to the depth of SHWT.
I trust this is the information you require at this time.
Sincerely,
M/P�UQM-
Mike Faker
NC Licensed Soil Scientist 41030
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email mike [e-mail]
SHWT depths, McPhail Meadows, Pittman Grove Church Road, Hoke
County, NC
BORING SHWT DEPTH (inches) Observed Water inches
TS 2 56 36
TS 3 53 60
TS 6 46 53
TS 8 0 28
TS 9 9 19
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Measured Ksat Rates, McPhail Meadows, Pittman Grove Church Road,
Hoke County, NC
Ksat
Ksat
Location
Depth in
cm/hr
in/hr
TS 2
30
2.66
1.05
TS 3
29
0.51
0.20
TS 6
22
7.98
3.14
TS 8
20
0.66
0.26
TS 9
13
1.57
0.62
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Soil Boring Log (TS 2), McPhail Meadows Subdivision, Pittman Grove Church
Road, Hake County, NC
This map unit consists of well drained soils that formed in loamy sediment on uplands.
Slope ranged from. 1 to 3 percent.
A - 0 to 13 inches; very dark brown (IOYR 2/2) loamy sand; single grained; loose; very
friable; common fine and medium roots; abrupt smooth boundary.
E - 13 to 22 inches; yellowish brown (IOYR 5/6) sandy loam; weak fine granular
structure; very friable; few fine and medium roots; clear smooth boundary.
Bt - 22 to 56 inches; yellowish brown (10YR 5/6) sandy clay loam; moderate medium to
weak fine subangular blocky structure; firm; gradual wavy boundary.
BC - 56 to 66 inches; yellowish brown (IOYR 5/6) sandy loam.; many medium prominent
light gray (IOYR 7/1) mottles; weak fine subangular blocky structure; friable; gradual
diffuse boundary.
C1 - 66 to 75 inches; light gray (IOYR 7/1) coarse loamy sand; many medium prominent
brownish yellow (1 OYR 6/6) mottles; massive structure; very friable.
SHWT @ 56 inches (IOYR 7/1)
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Soil Boring Log (TS 3), McPhail Meadows Subdivision, Pittman Grove Church
Road, Hoke County, NC
This map unit consists of well drained soils that formed in loamy sediment on uplands.
Slope ranged from 1 to 3 percent.
A - 0 to 6 inches; dark brown (10YR 3/3) loamy sand; single grained; loose; very friable;
common fine and medium roots; abrupt smooth boundary.
E - 6 to 25 inches; yellowish brown (2.5Y 6/6) loamy sand; weak fine granular structure;
very friable; few fine and medium roots; clear smooth boundary.
Btl - 25 to 36 inches; strong brown (7.5YR 5/8) sandy clay loam; moderate medium to
weak fine subangular blocky structure; firm; gradual wavy boundary.
Bt2 - 36 to 53 inches; strong brown (7.5YR 5/8) sandy clay loam; many medium
prominent brownish yellow (I OYR 6/6) mottles; weak fine subangular blocky structure;
firm; gradual diffuse boundary.
BC - 53 to 65 inches; mottled strong brown (7.5YR 5/8) and brownish yellow (IOYR 6/6)
sandy clay loam; many medium prominent light gray (IOYR 7/1) mottles; weak fine
subangular blocky structure; firm; gradual diffuse boundary.
C - 65 to 75 inches; mottled brownish yellow (10YR 6/6), light gray (IOYR 7/1) and red
(2.5YR 4/8) sandy clay loam; massive structure; firm.
SHWT @ 53 inches (10YR 7/1)
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Soil Boring Log (TS 6), McPhail Meadows Subdivision, Pittman Grove Church
Road, Hoke County, NC
This map unit consists of well drained soils that formed in loamy sediment on uplands.
Slope ranged from l to 3 percent.
A - 0 to 6 inches; dark brown (I OYR 3/3) loamy sand; single grained; loose; very friable;
common fine and medium roots; abrupt smooth boundary.
E - 6 to 18 inches; yellowish brown (2.5Y 6/6) loamy sand; weak fine granular structure;
very friable; few fine and medium roots; clear smooth boundary.
Btl - 18 to 38 inches; yellowish brown (1 OYR 5/8) sandy clay loam; moderate medium to
weak fine subangular blocky structure; firm; gradual wavy boundary.
Bt2 - 38 to 46 inches; brownish yellow (I OYR 6/6) sandy clay loam; many medium
prominent strong brown (7.5YR 5/8) mottles; weak fine subangular blocky structure;
firm; gradual diffuse boundary.
BC - 46 to 60 inches; light yellowish brown (I OYR 6/4) and light gray (I OYR 7/1) sandy
clay loam; massive structure; firm; gradual diffuse boundary.
C - 60 to 72 inches; mottled light yellowish brown (1 OYR 6/4), brownish yellow (1 OYR
6/6, light gray (1 OYR 7/1) and red (2.5YR 4/8) sandy clay loam; massive structure; firm.
SHWT @ 46 inches (I OYR 7/1)
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayettevilie, NC 28311
Phone/Fax [phone]
Email [e-mail]
Soil Boring Log (TS 8), McPhail Meadows Subdivision, Pittman Grove Church
Road Hoke County, NC
This map unit consists of poorly drained soils that formed in loamy sediments on
uplands. Slope is less than 2 percent. Seasonal High -Water table is near the surface.
A - 0 to 6 inches; black (1 OYR 2/1) loam; weak medium granular structure; very friable;
few fine roots; clear smooth boundary.
BAg - 6 to 17 inches; grayish brown (2.5Y 5/2) loamy sand; common medium distinct
streaks of black (I OYR 2/1); weak medium granular structure; friable; gradual wavy
boundary.
Btg 1 - 17 to 29 inches; gray (I OYR 6/ 1) sandy loam; many medium prominent yellowish
brown (1OYR 5/8) mottles; weak fine subangular blocky structure; friable, gradual wavy
boundary.
Btg2 - 29 to 48 inches; gray (I OYR 6/1) sandy clay loam; many medium prominent
yellowish brown (I OYR 5/8) mottles; weak fine subangular blocky structure; gradual
wavy boundary.
SHWT @ 0 inches (I OYR 2/1)
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax (91 Q) 822-4544
Email [e-mail]
Soil Boring Log (TS 9), McPhail Meadows Subdivision, Pittman Grove Church
Road Hoke County, NC
This map unit consists of poorly drained soils that formed in loamy sediments on
uplands. Slope is less than 2 percent. Seasonal High -Water table is near the surface.
A - 0 to 9 inches; dark brown (IOYR 3/3) loam; weak medium granular structure; very
friable; few fine roots; clear smooth boundary.
BAg - 9 to 17 inches; grayish brown (2.5Y 5/2) loamy sand; common medium distinct
streaks of dark brown (1 OYR 3/3); weak medium granular structure; friable; gradual
wavy boundary.
Btgl - 17 to 29 inches; gray (lOYR 511) sandy loam; many medium prominent yellowish
brown (IOYR 5/8) mottles; weak fine subangular blocky structure; friable, gradual wavy
boundary.
Btg2 - 29 to 48 inches; gray (10YR 6/1) sandy clay loam; many medium prominent
strong brown (7.5YR 5/8) and very pale brown (IOYR 8/2) mottles; weak fine subangular
blocky structure; gradual wavy boundary.
SHWT @ 9 inches (2.5Y 5/2)
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