20090597 Ver 5_CCEP Lot 8 SHWT Soil Evaluation Report_20210318

I I=
October 22, 2020
Samet Corporation
5420 Wade Park Blvd Suite 104
Raleigh, North Carolina 27607
Attention: Mr. Blake Malpass
Reference: Stormwater Soil Evaluation Report
CCEP Lot 8
Enterprise Park Drive, Sanford, Lee County, North Carolina
S&ME Project No. 1305-20-121
Dear Mr. Malpass:
S&ME, Inc. (S&ME) has conducted a stormwater soil evaluation in general accordance with S&ME Proposal 13-
2000430 dated October 1, 2020. Our evaluation was conducted to provide information for the design of a
Stormwater Control Measure (SCM) and a Stormwater Management Permit Application to the North Carolina
Department of Environmental Quality (NCDEQ) — Division of Energy, Minerals, & Land Resources (DEMLR) and/or
local municipality. A soil scientist evaluated the soil conditions within the proposed SCM location on October 19
and 20, 2020.
Background Information
Samet Corporation is in early design phase for a new business park in Sanford, North Carolina. The business park
will include 17 parcels ("lots") which will include building structures ranging in size from about 40,000 to 150,000
square feet. Development will also include, stormwater control structures, asphalt parking and driveways, and
cut/fill slopes. Lot 8 will include an approximate 117,133 square foot building with space to accommodate an
approximate 85,216 square foot future expansion.
As a part of the proposed Lot 8 development, there is one SCM planned in the northwest corner of the property
and two hand auger borings to determine the seasonal high water table (SHWT) were requested. The site
boundary, SCM location, and requested hand auger boring locations are depicted on the attached United States
Department of Agriculture (USDA) Soil Conservation Service (SCS) Lee County soil survey exhibit (Figure 1) and
United States Geologic Service (USGS) topographic exhibit (Figure 2) respectively.
The soil evaluation was performed with hand auger borings conducted at two locations (B-1 and B-2) as shown on
the attached Stormwater Soil Evaluation Exhibit (Figure 3). Our evaluation consisted of identifying and recording
the soil morphological conditions at these locations in order to develop soil profile descriptions, perform SHWT
estimations and measure the observed water table (OWT) if applicable.
S&ME, Inc. 13201 Spring Forest Road I Raleigh, NC 27616 I p 919.872.2660 I www.smeinc.com

Stormwater Soil Evaluation Report
CCEP Lot 8
Enterprise Park Drive, Sanford, Lee County, North Carolina
S&ME Project No. 1305-20-121
Findings
SHWT Estimation, OWT Measurement, and Depth to Auger Refusal
S&ME estimated the SHWT by advancing hand auger borings at the locations as shown on the attached Figure 3
and evaluating the soil for evidence of SHWT influence. This evaluation involved looking at the actual moisture
content in the soil and observing the matrix and mottle colors. Depending on the soil texture, the soil color will
indicate processes that are driven by SHWT fluctuations, such as iron reduction and oxidation and organic matter
staining.
In addition, S&ME recorded the depth that the OWT was encountered below existing ground surface (EGS) at
each soil boring location if applicable. The OWT was measured as the static water level in each of the temporary
hand auger boring locations at one hour and 24 hours after advancing the hand auger borings. It should be noted
that the static water level/OWT measured in the auger holes is a measurement of the water table at that moment
and does not represent an average water level or the highest point at which the water table may rise to.
Furthermore, it is expected that groundwater elevations in the study area will likely be influenced by factors such
as precipitation and proximity to surface water discharge/recharge features.
According to the USDA-NRCS National Water and Climate Center there was no reported rainfall for this area two
days prior to our initial OWT reading on October 19, 2020, and no reported rainfall within 24 hours of our second
OWT reading on October 20, 2020.
See Table 1 below and Figure 3 for the estimated depth to SHWT, measured depth to the OWT at 1-hour and 24-
hours, and auger refusal if applicable.
Table 1
HAND AUGER
BORING
LOCATION
SHWT DEPTH
(inches/feet
below EGS)
OWT DEPTH AT
1 HOUR
(inches/feet
below EGS)
OWT DEPTH AT
24 HOURS
(inches/feet
below EGS)
AUGER REFUSAL
DEPTH
(inches/feet below
EGS)
B-1
20/1.7
24 / 2.0
18 / 1.5
68 / 5.7
B-2
38 / 3.2
>60 / >5.0
52 / 4.3
60 / 5.0
EGS: Existing Ground Surface
Permeability/Hydraulic Conductivity Estimation
The soil profile descriptions on the attached Figure 3 show the soil morphological conditions including soil
texture, structure, soil matrix and mottle color, estimated United States Department of Agriculture (USDA)
permeability and estimated USDA hydraulic conductivity (Ksat) for the different soil horizons found on -site.
Please refer to the enclosed map and soil profile descriptions for more information. These estimates were
obtained from one or more of the following: Lee County Soil Survey "Physical & Chemical Properties of the Soil -
October 22, 2020 2

Stormwater Soil Evaluation Report
CCEP Lot 8
Enterprise Park Drive, Sanford, Lee County, North Carolina
S&ME Project No. 1305-20-121
Permeability"; and/or USDA-NRCS (United States Department of Agriculture - Natural Resource Conservation
Service) official series description, and/or "NRCS Field Book for Describing & Sampling Soils". The permeability
estimates were converted to conductivity on the profile description tables.
♦ Limitations
Data and conclusions presented herein are based on materials encountered at the hand auger boring locations
only. Conditions may vary between hand auger boring locations and in other areas of the proposed SCM. The
reported depths are based upon the ground surface locations of the borings at the time of our evaluation.
4 Closing
S&ME appreciates the opportunity to provide soil evaluation services for this project. If you have any questions
please contact Walter Cole at 919-872-2660 or [e-mail].
Sincerely,
S&ME, Inc.
Walter Cole, LSS, REHS
Senior Project Manager
Thomas P. Raymond, PE
Environmental Area Manager
Enclosed: Figure 1: USDA-SCS Lee County Soil Survey Exhibit
Figure 2: USGS Topographic Exhibit
Figure 3: Stormwater Soil Evaluation Exhibit
October 22, 2020 3

Figures

Drawing Path: C\Users\abentz \ Desktop \Remote GIS\1305-20-121 CCEP Lot 8\LOT8_SOILS.mxd plotted by abentz 10-15-2020
(
REFERENCE:
GIS BASE LAYERS WERE OBTAINED FROM THE USDA-NRCS SOIL SURVEY AREA NC105 AND
THE 2017 NCONEMAP AERIAL ORTHOIMAGERY LAYER. THIS MAP IS FOR INFORMATIONAL
PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYED ARE APPROXIMATED. THEY ARE
NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS STATED OTHERWISE.
USDA-NRCS SOIL SURVEY EXHIBIT
LOT 8 SITE
CLYDE RHYNE DRIVE
SANFORD, LEE COUNTY, NORTH CAROLINA
e
SOILS:
MfD: Mayodan fine sandy loam, 8-15% slopes
MfE: Mayodan fine sandy loam, 15-25% slopes
NaB: Nanford silt loam, 2-8% slopes
® Hand Auger Boring Location
Proposed SCM Location
Soil Map Unit
I Lee County Parcels
SCALE:
1"=200'
DATE:
10-15-20
PROJECT NUMBER
1305-0-121
FIGURE NO.
1
J

Drawing Path: C:\Users\abentz\Desktop\Remote GIS\1305-20-121 CCEP Lot 8\LOT8_USGS.mxd plotted by abentz 10-15-2020
CLYDE RHYNE DR
G u m Fork
0 500 1,000
(FEET)
B-1
•
•
B-2
REFERENCE:
GIS BASE LAYERS WERE OBTAINED FROM THE USGS NATIONAL TOPO MAP VIEWER. THIS
MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS DISPLAYED ARE
APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION, UNLESS STATED
OTHERWISE.
® Hand Auger Boring Location
Proposed SCM Location
USGS TOPOGRAPHIC EXHIBIT
SCALE:
1"=500'
LOT 8 SITE
CLYDE RHYNE DRIVE
SANFORD, LEE COUNTY, NORTH CAROLINA
DATE:
10-15-20
PROJECT NUMBER
1305-20-121
FIGURE NO.
2

Drawina Path: C:\Users\abentz\Desktop\Remote GIS\1305-20-121 CCEP Lot 8\LOT8 STORMWATER.mxd plotted by abentz 10-21-2020
09Z
ggz
REFERENCE:
GIS BASE LAYERS WERE OBTAINED FROM THE 2017 NCONEMAP AERIAL ORTHOIMAGERY
LAYER AND THE CCEP LOT # 2 BORING LOCATION AND OFFSITE DRAINAGE EXHIBIT DATED
9-14-2020 BY CE GROUP. THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL
FEATURE LOCATIONS DISPLAYED ARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL
SURVEY INFORMATION, UNLESS STATED OTHERWISE.
S&ME Project Number: 1305-20-121
Depth
(in)
(Matrix) (Mottles)
10YR 3/2
Bt1 3-6 5YR5/4
Bt2 6-14 2.5YR4/3
Bt3
Bt4
14-20 2.5YR4/3
20-32 5YR4/4
5YR 5/3
5YR 5/3
10YR 5/4
10YR 6/6
1OR 4/4
5YR 5/6
10R 4/4
10YR 7/1
10YR 5/6
10YR 7/1
1OR 5/3
5Y 7/1
Soil Profile Descriptions
Boring B-1
Boring Date: October 19, 2020
Texture
sandy
loam
clay loam
silty clay
silty clay
Structure
weak granular
silty clay weak
silty clay weak
silty clay weak
loam
subangular
blocky
subangular
blocky
subangular
blocky
angular
blocky
angular
blocky
angular
blocky
Moist
Consistence
very friable
friable
Landscape Position: Sideslope
saturated
saturated, weak
mottling
saturated, rock
fragments, strong
mottling
auger refusal
Estimated SHWT depth from EGS: 20 inches (1.7 feet )
Measured OWT depth from EGS at 1 hour: 24 inches (2.0 feet )
Measured OWT depth from EGS at 24 hours: 18 inches (1.5feet )
S&ME Project Number: 1305-20-121
Depth to auger refusal: 68 inches (5.7 feet )
Boring B-2
Boring Date: October 19, 2020
Depth Color
Horizon (in) (Matrix) (Mottles) Texture
A 0-2 10YR3/2 10YR5/4 sandy
loam
Bt1 2-6 5YR5/6
5YR 5/4
10R 4/4
2.5YR 4/4
10YR 6/8
10YR 5/4
10YR 6/6
10YR 6/3
10YR 6/1
Grade
Moist
Structure Consistence
granular very friable
clay loam weak subangular
blocky
silty clay weak subangular
blocky
silty clay weak
silty clay
loam
WA WA rock
Estimated SHWT depth from EGS:
Measured OWT depth from EGS at 1 hour:
Measured OWT depth from EGS at 24 hours:
Depth to auger refusal:
angular
blocky
angular
blocky
38
>60
52
60
friable
inches
inches
inches
inches
USDA
Estimated
Permeability
(in/hr)
0.06 - 0.2
0.06 - 0.2
0.06 - 0.2
0.06 - 0.2
Landscape Position: Sidegi@p®
rock fragments
auger refusal
(3.2feet )
(>5.0feet )
(4.3feet )
(5.0feet )
USDA
Estimated
Conductivity
(in/hr)
0.14- 1.4
0.014 - 0.14
0.014 - 0.14
0.014 - 0.14
0.014 - 0.14
0.14 - 1.4
Estimated Estimated
Permeability Conductivity
2-6 1.4-14
0.06 - 0.2
0.06 - 0.2
0.14- 1.4
0.014 - 0.14
0.014 - 0.14
0.14 - 1.4
® Hand Auger Boring Location
Lee County Parcels
Proposed SCM Location
SCALE:
1"=100'
DATE:
10-21-20
PROJECT NUMBER
1305-20-121
FIGURE NO.
3