SW3201002_49-12742 - A - Proposed 7-Eleven - Long Ferry Road - SHWT Report_20210119

ECS SOUTHEAST, LLP "Setting the Standard for Service"
Geotechnical - Construction Materials - Environmental - Facilities NC Registered Engineering Firm F-1078
NC Registered Geologists Firm C-553
SC Registered Engineering Firm 3239
January 13, 2021
Mr. Jamie Dillen
C4 CStore Holdings II, Inc.
121 West Trade Street, Suite 250
Charlotte, North Carolina 28202
Reference: Seasonal High Water Table Determination
Proposed 7-Eleven — Long Ferry Road
Salisbury, Rowan County, North Carolina
ECS Project No: 49:12742-A
Dear Mr. Dillen:
ECS Southeast, LLP (ECS) is pleased to submit this report of the Seasonal High Water Table Determination
(SHWT) for the Proposed 7-Eleven — Long Ferry Road site in Salisbury, Rowan County, North Carolina. This
report summarizes our findings for the site.
PROJECT UNDERSTANDING
The property is located at 1215 Long Ferry Road in Salisbury, Rowan County, North Carolina. The site
exploration requested is to estimate the SHWT at a single requested location within the site's
stormwater control measure (SCM) area. A site plan has been provided to ECS by McAdams which
indicates the assessment area.
The proposed 7-Eleven Long Ferry Road Construction Drawing, provided by McAdams, was utilized as a
background for the attached Figure 1. The soil investigation was conducted by reviewing samples from a
hand auger.
SCOPE OF SERVICES
ECS conducted a study/investigation of the soils to identify the depth of the seasonal high water table, if
present. The properties and characteristics of the soils retrieved from the boring were observed and
recorded in field notes. The properties include texture, depth, the presence of restrictive horizons, depth to
seasonal high water table, coarse fragments, etc. The assessment was conducted in accordance with
current soil science practices and technology.
SEASONAL HIGH WATER TABLE STUDY
Below is a summary of the soils retrieved from the borings.
SHWT B —1—The surface layer to a depth of approximately 3 inches bgs (below ground surface) was brown
sandy loam with weak, fine, granular structure. The consistence was non -sticky, non -plastic, and friable.
The sub -surface layer from approximately 3 inches to approximately 80 inches bgs was red and brown clay
with moderate, fine, sub -angular blocky to angular blocky structure. The consistence was sticky, plastic, and
firm. The sub -surface layer from approximately 80 inches to approximately 120 inches bgs was yellow and
1812 Center Park Drive, Suite D, Charlotte, NC 28217 • T: 704-525-5152 • F: 704-357-0023 • www.ecslimited.com
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sHwr study
Proposed 7-Eleven — Long Ferry Road
Salisbury, Rowan County, North Carolina
ECS Project No. 49:12742 A
January 13, 2021
Page 2
brown clay loam with weak, fine, sub -angular blocky structure. The consistence was sticky, plastic, and firm.
The sub -surface layer from approximately 120 inches to approximately 144 inches (-12 feet) bgs was multi-
colored clay loam to sandy clay loam saprolite.
FINDINGS
SHWT B — 1 — Indication (gray mottles) of SHWT was noted at approximately 80 inches bgs. These indicators
became more predominant as the boring progressed in depth. Moist soils were noted at approximately 132
inches (-11 feet) bgs.
The type of stormwater management facility designed is based on the depth of the SHWT or confining layer.
The information above may be potentially utilized to determine the type of stormwater management
facility best suited for this site according to the most recent version of the North Carolina Division of Water
Quality Stormwater Best Management Practice Manual.
CLOSING
ECS is pleased to offer our professional services and look forward to assisting in any of your site analysis
needs in the future. If you have any questions or require further assistance, please contact us at 704-525-
5152.
Respectfully,
ECS SOUTHEAST, LLP
Jonathan Grubb
Assistant Project Manager
Igrubb ecslimited.com_
919-861-9910
Attachment: Figure 1— SHWT Boring Location Map
W. Brandon Fulton, LSS, PSC, PWS
Environmental Principal
[e-mail]
704-525-5152

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