SW1210901_Soils/Geotechnical Report_20220405

December 22, 2021
Asheville Regional Airport
61 Terminal Drive, Suite 1
Fletcher, North Carolina 28732
Attention: Mr. Jared Merrill
Reference: Stormwater Soil Evaluation Report
AVL Parking Lot D
Fletcher, North Carolina
S&ME Project No. 21350006
Dear Mr. Merrill:
S&ME, Inc. (S&ME) has conducted a stormwater soil evaluation in general accordance with S&ME Proposal
21350006 dated December 1, 2021. 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 December 20,
2021.
Background Information
The proposed project consists of a new parking lot (Lot D) which is to be constructed on the east side of Airport
Road to serve the Asheville Regional Airport (AVL) in Fletcher, North Carolina. Approximately 0.6 acres of property,
comprised of two parcels, will be used for the parking lot.
In addition, bioretention type SCMs are proposed as part of the development and hand auger borings to
determine the seasonal high water table (SHWT) were requested. The site boundary and proposed bioretention
SCM locations are depicted on the attached United States Department of Agriculture (USDA) Soil Conservation
Service (SCS) Buncombe and Henderson County soil survey exhibit (Figure 1) and United States Geologic Service
(USGS) topographic exhibit (Figure 2) respectively.
The soils on -site in the vicinity of the proposed SCM are mapped as the Hayesville soil series. The Hayesville series
consists of very deep, well drained soils on gently sloping to very steep ridges and side slopes of the Southern
Appalachian Mountains.
The soil evaluation was performed with hand auger borings conducted at four locations (SW-1 through SW-4) 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 1 p 919.872.2660 1 www.smeinc.com

Stormwater Soil Evaluation Report
AVL Parking Lot D
Fletcher, North Carolina
S&ME Project No. 21350006
Findings
SHWT Estimation, OWT Measurement, and Depth to Auger Refusal
S&ME estimated the SHWT by advancing hand auger borings at the four 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 attempted to measure the OWT level below existing ground surface (EGS) at the indicated hand
auger boring locations, however groundwater was not encountered. Auger refusal was encountered at the four
hand auger boring locations.
See Table 1 below and Figure 3 for the estimated depth to SHWT, measured depth to the OWT and auger refusal
if applicable.
Table 1
HAND AUGER
SEASONAL HIGH WATER
OBSERVED WATER
AUGER REFUSAL
BORING
LOCATION
TABLE (SHWT) DEPTH
(inches/feet below EGS)
•1 1
TABLE (OWT) DEPTH
(inches/feet below EGS)
•1 1
DEPTH
(inches/feet below EGS)
•1 1
• 1
• 1
• 1
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: Buncombe and Henderson County Soil Survey "Physical & Chemical
Properties of the Soil - 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.
December 22, 2021

Stormwater Soil Evaluation Report
AVL Parking Lot D
Fletcher, North Carolina
S&ME Project No. 21350006
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 SCMs. The
reported depths are based upon the ground surface locations of the borings at the time of our evaluation.
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.
SOIL C
OF ���1267 pC
\NORTH
��
Walter Cole, LSS, REHS Thomas P. Raymond, PE
Senior Project Manager Environmental Area Manager
Enclosed: Figure 1: USDA-SCS Buncombe & Henderson County Soil Survey Exhibit
Figure 2: USGS Topographic Exhibit
Figure 3: Stormwater Soil Evaluation Exhibit
December 22, 2021 3

Figures

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Soil Profile Descriptions
Boring SW-1
S&ME Project Number: 21350006 Boring Date: December 20, 2021 Landscape Position: Nose Slope
Color
USDA
USDA
Estimated
Estimated
Depth
Moist
Permeability
Conductivity
Horizon
(in)
(Matrix)
(Mottles)
Texture
Grade
Structure
Consistence
Notes
(in/hr)
(in/hr)
A
0-4
7.5YR4/3
loam
w eak
granular
very friable
gravel pieces
2-6
1.4- 14
C1
4-40
5YR 4/6
silt loam
massive
very friable
0.6 - 2
0.14 - 1.4
C2
40-60
2.5YR 5/4
silt loam
massive
very friable
saprolite w ith rock
0.6 - 2
0.14 - 1.4
fragments
Cr
60+
WA
N/A
rock
N/A
WA
N/A
auger refusal
WA
WA
Estimated SHWT depth from EGS: >60 inches ( >5.0 feet )
Measured OWT depth from EGS: >60 inches ( >5.0 feet )
Depth to auger refusal: 60 inches ( 5.0 feet )
Boring SW-2
S&ME Project Number: 21350006 Boring Date: December 20, 2021 Landscape Position: Nose Slope
Color
USDA
USDA
Estimated
Estimated
Depth
Moist
Permeability
Conductivity
Horizon
(in)
(Matrix)
(Mottles)
Texture
Grade
Structure
Consistence
Notes
(in/hr)
(in/hr)
A
0-6
7.5YR4/3
loam
w eak
granular
very friable
gravel pieces
2-6
1.4- 14
C1
6-14
7.5YR 5/8
clay loam
weak
subangu ar
friable
0.6 - 2
0.14 - 1.4
C2
14-38
2.5YR 4/4
silt loam
massive
very friable
sapfflate9n� rock
0.6 - 2
0.14 - 1.4
Cr
38+
WA
N/A
rock
N/A
WA
N/A
auger refusal
WA
WA
S
Estimated SHWT depth from EGS: >38 inches ( >3.2 feet )
Measured OWT depth from EGS: >38 inches ( >3.2 feet )
Depth to auger refusal: 38 inches ( 3.2 feet )
Boring SW-3
S&ME Project Number: 21350006 Boring Date: December 20, 2021 Landscape Position: Nose Slope
i
Color
USDA
USDA
Estimated
Estimated
Depth
Moist
Permeability
Conductivity
Horizon
(in)
(Matrix)
(Mottles)
Texture
Grade
Structure
Consistence
Notes
(in/hr)
(in/hr)
i
A
0-2
10YR3/3
loam
weak
granular
very friable
2-6
1.4-14
C1
2-6
7.5YR4/3
clay loam
weak
subangular
friable
0.6-2
0.14-1.4
blocky
C2
6-36
5YR 4/4
sandy
massive
very friable
saprolite with rock
2-6
1.4- 14
loam
fragments
Cr
38+
WA
I N/A
rock
N/A
WA
N/A
auger refusal
WA
WA
Estimated SHWT depth from EGS: >36 inches ( >3.0 feet )
Measured OWT depth from EGS: >36 inches ( >3.0 feet )
Depth to auger refusal: 36 inches ( 3.0 feet )
Boring SW-4
S&ME Project Number: 21350006 Boring Date: December 20, 2021 Landscape Position: Nose Slope
Color
USDA
USDA
Estimated
Estimated
Depth
Moist
Permeability
Conductivity
Horizon
(in)
(Matrix)
(Mottles)
Texture
Grade
Structure
Consistence
Notes
(in/hr)
(in/hr)
A
0-6
10YR3/2
loam
w eak
granular
very friable
gravel pieces
2-6
1.4- 14
C1
6-10
7.5YR4/3
clay loam
weak
subangular
friable
0.6-2
0.14-1.4
blocky
C2
10-32
5YR 5/4
10YR 6/6
sandy
massive
very friable
saprolite w ith rock
2-6
1.4- 14
loam
fragments
Cr
32+
WA
N/A
rock
N/A
WA
N/A
auger refusal
WA
WA
Estimated SHWT depth from EGS: >32 inches ( >2.7 feet)
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Measured OWT depth from EGS: >32 inches >2.7 feet)
(
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Depth to auger refusal: 32 inches ( 2.7 feet )
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SCALE:
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4P DATE:
' 12-22-21
F r1 s 0 50 100 PROJECT NUMBER
(FEET) 21350006
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REFERENCE: ® Hand Auger Boring Location FIGURE NO.
GIS BASE LAYERS WERE OBTAINED FROM THE 2019 NCONEMAP AERIAL ORTHOIMAGERY _
LAYER. THIS MAP IS FOR INFORMATIONAL PURPOSES ONLY. ALL FEATURE LOCATIONS Proposed SCM
DISPLAYED ARE APPROXIMATED. THEY ARE NOT BASED ON CIVIL SURVEY INFORMATION,
UNLESS STATED OTHERWISE. Subject Parcel