SW6220504_Soils/Geotechnical Report_20220606 (1)

Scott Cole, NCLSS
312 Copples Road Ext
Asheboro, NC 27205
[phone]
Double D Engineering, PLLC
Attn: Mr. Lee Humphrey
150 S. Page Street
Southern Pines, NC 28387
September 21, 2021
Re: Seasonal High -Water Table Identification: Cameron Village; Hoke County, NC
Soil conditions and infiltration rates were evaluated and measured on the above -referenced property within
the proposed storm water BMP device. Work was conducted in accordance with Parts A-2 and C-1 of the
North Carolina Department of Environmental Quality Stormwater Design Manual. Soil samples were
evaluated with a hand auger.
SEASONAL HIGH WATER TABLE IDENTIFICATION
Seasonal High Water Table depth is determined by field evaluation for soil wetness conditions which are
indicated by the presence of redoximorphic (redox) features with a chroma of 2 or less (in Munsell color
notation) in mottles or the horizon matrix. Colors of chroma 2 or less due to relic minerals from parent
material (underlying rock), anaerobic activity created by placement of fill material, or soil textural class
transitions (perched water) are not considered as indicators for seasonal high water. Upon determination
of SHWT depth, an additional 6" will be deducted from the observed depth to account for capillary fringe
water movement above the SHWT. Stormwater infiltration trenches are designed to ensure the lowest point
is at least two feet above the Seasonal High Water Table (SHWT).
SATURATED HYDRAULIC CONDUCTIVITY (Kt)
Soils within the proposed stormwater BMP devices are typical of those within the McColl Loam series.
McColl Loam soils are typically located in shallow oval depressions of uplands with slow permeability.
Due to mixed mineralogy soils within the soil profile, infiltration rates were not measured to determine the
suitability for installation of stormwater infiltration BMP devices.
A summary of observations within the proposed Stormwater BMP Devices are shown in the table below.
BMP
SHWT
SHWT
Munsell Color
Location #
(feet below
Elevation
Notation
round surface
1
14'
242'
SY 8/1
2.5Y 7/1
2
12'
248'
SY 8/1
2.5Y 7/1
I am pleased to be of service in this matter and can be contacted at your convenience should you have any
questions concerning information within this report.
Thank you,
6�4z
Scott Cole
North Carolina Licensed Soil Scientist

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