SW6221004_Soils/Geotechnical Report_20221021

Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email mike@sou€heasternsoil.com
December 14, 2021
Mr. Ken Smith, Jr. PE
Smith Site Solutions, PLLC
Fayetteville, NC
Re: Hydraulic conductivity (permeability) analysis & Seasonal High -Water Table
determination (SHWT) for proposed stormwater retention/treatment area, EEB Holdings,
LLC property, PIN 0425-36-6692, 3563 Camden Road, Fayetteville, North Carolina
Dear Mr. Smith,
An evaluation of soil properties and hydraulic conductivity (Ksat) has been conducted at
your request on a portion of the aforementioned property. The purpose of the
investigation was to determine seasonal soil water table depths (SHWT) based on soil
profiles. In addition, Ksat was to be provided at varying depths 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 Permeameter 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 (typically at least 2.0 feet above
SHWT). At this depth, a constant head (pressure) was established and maintained.
Flow measurements were made at timed intervals after flow stabilized.
Soils at the proposed basin site are most similar to the Candor soil series (see attached
boring logs). Three soil borings were advanced to 7.25 or more feet below the existing
ground surface. Seasonal High -Water Table (SHWT) as determined by evidence of
colors of chroma 2 or less (and/or concentrations of high redox mottles) was encountered
at depths of 65 to 71 inches below the ground surface. No static water was observed in
any boring on the day of testing.
SOIUSITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS
GROUNDWATER DRAINAGEIMOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN

Six compact constant head permeameter (CCHP) tests were conducted at varying depths
below the ground surface (at least 2.0 feet above SHWT; see attached). The measured
Ksat rate ranged from 6.65 to 21.29 cm/hr. (equivalent to 2.62 to 8.38 inches/hour).
The attached map shows approximate locations of the sample points as well as Ksat
location.
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.). Reported static water levels are simply a measurement on the
day of analysis.
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,
Mike Eaker
NC Licensed Soil Scientist #1030
SCILS
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Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
5HWT depths, 3563 Camden Road, EEB Holdings, LLC, Fayetteville,
North Carolina
BORING SHWT DEPTH inches Observed Water(inches),Bore Top Elew
BI
71
- elev 204.90
None
210.82
B2
68
- elev 205.46
None
211.13
B3
65
- elev 205.22
None
210.64
SOIL/SITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS
GROUNDWATER DRAINAGE/MOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN

Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Measured Ksat Rates, 3563 Camden Road, EEB Holdings, LLC,
Fayetteville, North Carolina
Ksat
Ksat
Location
Depth in
emlhr
in/hr
1
36
6.65
2.62
1
47
15.30
6.02
2
36
21.29
8.38
2
44
8.65
3.40
3
36
10.43
4.11
3
41
15.30
6.02
SOIL/SITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS
GROUNDWATER DRAINAGE/MOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN

Southeastern Soil & Environmental Associates, Inc.
P.O. Box 9321
Fayetteville, NC 28311
Phone/Fax [phone]
Email [e-mail]
Typical Soil Profile Description, 3563 Camden Road, EEB Holdings, LLC property,
Fayetteville, North Carolina
This map unit consists of nearly level to gently sloping well drained soils that formed in
sandy and loamy sediment on uplands. Slopes range from 0 to 1 percent.
A - 0 to 5 inches; black (l 0YR 2/ 1) loamy sand; weak fine granular structure; very
friable; common fine roots; abrupt smooth boundary.
E - 5 to 32 inches; light yellowish brown (2.5Y 6/3) loamy sand; weak fine granular
structure; very friable; few fine roots; clear wavy boundary.
Bt1 - 32 to 58 inches; yellowish brown (IOYR 5/8) light sandy clay loam to sandy loam;
moderate medium to weak fine subangular blocky structure; friable to firm; gradual
diffuse boundary.
BC - 58 to 71 inches; olive yellow (2.5Y 6/6) sandy loam; weak fine subangular blocky
structure; friable; gradual diffuse boundary.
C1 - 71 to 82 inches; mottled olive yellow (2.5Y 6/6), light gray (2.5Y 7/1) and red
(2.5YR 4/8) sandy loam; weak fine granular structure; friable; gradual diffuse boundary.
C2 - 82 to 87 inches; mottled light yellowish brown (2.5Y 6/3) and light gray (2.5Y 7/1)
sandy loam; weak fine granular structure; friable.
SHWT @ 71 inches below ground surface in boring 1 (2.5Y 7/1)
SHWT @ 68 inches below ground surface in boring 2 (1OYR 6/2)
SHWT @ 65 inches below ground surface in boring 3 (1OYR 7/1)
SOIUSITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS
GROUNDWATER DRAINAGE/MOUNDING • SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN

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