SW3230501_Soils/Geotechnical Report_20230616

PRELIMINARY SOIL AND SITE EVALUATION
12400 Old Camden Road
Midland, NC 28107
Prepared For:
Jay Eaves
CESI
P.O. Box 268
Concord, NC 28026
Prepared By:
Thompson Environmental Consulting, Inc.
PO Box 541
Midland, NC 28107
February 2,2021

INTRODUCTION & SITE DESCRIPTION
This Preliminary Soil and Site Evaluation was performed ona51.1-acre tract locatedat 12400
Old Camden Road, Midland,North Carolina (Cabarrus County Parcel Number:
55340702340000).
Thompson Environmental Consulting, Inc. (TEC)was retained to determinewhether the soils
weresuitable for the installation of an onsite subsurface wastewater treatment and disposal
systems on a proposed eight lot industrial subdivision.The propertywas evaluated in
accordance with North Carolina statutes for waste disposal (“Laws and Rules for Sewage
Treatment and Disposal Systems”, amended April 1, 2017).
INVESTIGATION METHODOLOGY& SITE PHYSICAL CHARACTERISTICS
Individual soil boringswere evaluated,and soil color was determinedwith a Munsell Soil Color
Chart. Observations of the landscape(slope, drainage patterns, etc.) as well as soil properties
(depth, texture, structure, seasonal wetness, restrictive horizons, etc.) were recorded.

The project study areaisprimarily vegetated with a mixed deciduous forest with a few
previously cleared open areas located more towards Old Camden Road. Several natural drainage
features were noted at the time of our field survey and are noted in the attached Figure 1 as
“Unsuitable Landscape Features”.
FINDINGS
A field survey was conducted on January 29, 2021 by Michael Wood, LSS, Larry Thompson,
LSS, and Ethan Wood, ES.Fifty-four soilborings wereadvancedwith hand-held augers and
their locations notedin Figure 1.
Borings rated as Provisionally Suitable for Accepted Systems and Low-Profile Chambers are
denoted as green points.Surfaces, when present, exhibited a friable sandy clayloam texture to a
depth of 4 to 11 inches. Upper subsurface horizons exhibited firm clay textures with moderate,
medium, subangular block structureto depths of 22 to 31 inches.Arange in long-term
acceptance rates (LTAR) of 0.2 to 0.3 gal./day/sq. ft. would typically be recommended for these
soils.
Borings rated as Provisionally Suitable for the installation of Subsurface Drip Dispersal Systems
are denoted as yellow points.Surfaces typically exhibited friable sandy loam to siltloam
textures with weak, medium, granular structure 4 to 11inches in depth. Upper subsurface
horizons exhibited firm clayloamto clay textures with moderate, medium, subangular blocky
structure 14 to 22inches in depth before encountering rock, expansive clay, orsoil wetness
indicators. Arange in long-term acceptance rates (LTAR) of 0.1 to 0.15 gal./day/sq. ft. would
typically be recommended for these soils.
Borings rated as Unsuitable for wastewater treatment and disposal cannot be considered for
subsurface septic systems. These borings are noted in the attached Figure as red points.
12400 Old Camden Road1February 2, 2021
Preliminary Soil and Site Evaluation

DISCUSSION
Soil units observed within the project study area have the potential tosupport the installation of
Accepted, Low-Profile Chamber, andSubsurface DripDispersal Systems.Required drainfield
sizeswill be determined by the daily flow rate for the proposed businessesand the recommended
LTAR of the soil unit that is being considered for use.A special hydraulic assessmentwould be
required (state requirement) to determinethe actual LTAR in areas where the soil depth has been
determined Provisionally Suitable for Subsurface Drip Dispersal Systems.
Lot 6 may benefit from a more detailedsoils investigation utilizing pitsin the front right corner
of the parcel, adjacent to Lot 7.
CONCLUSION
The findings presented herein represent TEC’s professional opinion based on our Soil and Site
Evaluation and knowledge of the current laws and rules governing on-site wastewater systems in
North Carolina. Soils naturally change across a landscape and contain many inclusions. As
such, attempts to quantify them are not always precise and exact. Due to this inherent variability
of soils and the subjectivity when determining limiting factors, there is no guarantee that a
regulating authority willagree with the findings of this report.
12400 Old Camden Road2February 2, 2021
Preliminary Soil and Site Evaluation