26028_Stateville Ave_Addendum ESA Ph II Rpt_sealed_20230215

Report of Environmental Assessment Services
Statesville Avenue Muti-Family Development
3239/3245 Statesville Avenue and 2128/2129 Whittington Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:17096-B
February 15, 2023

1

February 15, 2023
Mr. Jay Deng 3245 Statesville Property, LLC 370 Lexington Avenue, Suite 700 New York, New York 10017 Reference: Addendum to Report of Environmental Assessment Services Statesville Avenue Multi-Family Development 3239/3245 Statesville Avenue and 2128/2129 Whittington Street Charlotte, Mecklenburg County, North Carolina NCBP# 26028-22-060 ECS Project No. 49:17096-B Dear Mr. Deng: ECS Southeast, LLP (ECS) is pleased to provide 3245 Statesville Property, LLC with this addendum for the above-referenced site. ECS’s services were provided in general accordance with ECS proposal No. 49:32463P approved by 3245 Statesville Property, LLC on October 26, 2022. Project Information The subject property is located at 3239 and 3245 Statesville Avenue and 2128 and 2129 Whittington Street
in Charlotte, Mecklenburg County, North Carolina (Figures 1 and 2) and is identified by the Mecklenburg
County Parcel Identification Numbers 07705201, 07706303, 07706308, 07706309, and 07706313 and
owned by DH Griffin Infrastructure, LLC. ECS recently submitted a Report of Environmental Assessment Services (ECS Project No. 17096-B, dated
January 12, 2023). This report documented the collection and laboratory analysis of soil, groundwater,
methane, and soil gas samples at various accessible locations on the subject property. The surveying of
the top-of-casings of the monitoring wells installed as part of these activities, calculation of groundwater
elevation data, and preparation of groundwater contour map was proposed to be included in the report;
however, the results of the surveying activities had not been received by ECS at the time of submittal of
the report.

As such, ECS has prepared this addendum to provide the results of the monitoring well surveying,
calculation of groundwater elevation data, and groundwater flow map.

Scope of Services

On December 20, 2022, Tidemark Land Services (Tidemark) vertically and horizontally surveyed the five
monitoring wells previously installed at the site. The data provided by Tidemark is attached to this
addendum. Using Tidemark’s data and the depth to water measurements collected during the sampling
activities conducted on November 11, 2022, ECS calculated the groundwater elevation at each monitoring
Report of Environmental Assessment Services
Statesville Avenue Muti-Family Development
3239/3245 Statesville Avenue and 2128/2129 Whittington Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:17096-B
February 15, 2023

2
well. Monitoring well construction details and the calculated groundwater elevations are provide in the
attached Table 1.

Using the calculated groundwater elevations, ECS prepared Figure 3 showing the inferred groundwater
contours and flow direction. Based upon the surveyed elevations of the top-of-casing of each temporary
monitoring well and the depth to water measurements measured on November 18, 2022, the inferred
groundwater flow direction beneath the site flow is generally to the west and west-southwest.

ECS appreciates the opportunity to provide our services to you. If there are questions regarding this
report, or a need for further information, please contact us.

Respectfully submitted,
ECS SOUTHEAST, LLP Scott Young, P.G. Matthew H. McDuffie, P.G.
Senior Environmental Project Manager Principal Geologist
[e-mail] [e-mail]
704-525-5152 704-525-5152

Joseph P. Nestor, P.G., P.E.
Environmental Principal
[e-mail]
704-280-7422 Attachments: Figure 1 – USGS Topographic Map Figure 2 – Site Aerial Map Figure 3 – Groundwater Contour Map Table 1 – Monitoring Well Construction Details and Groundwater Elevation Data Survey Data

FIGURES

FIGURE 1
USGS TOPOGRAPHIC MAP
STATESVILLE AVE. MULTI-FAMILY DEVELOPMENT
STATESVILLE AVENUE AND WHITTINGTON STREET
CHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:17096-B
SOURCE:
USGS 7.5’ TOPOGRAPHIC MAP
DERITA, NC 2019
SCALE:
AS SHOWN
SITE
LOCATION
FIGURE 2
SITE AERIAL MAP
STATESVILLE AVE. MULTI-FAMILY DEVELOPMENT
STATESVILLE AVENUE AND WHITTINGTON STREET
CHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:17096-B
SOURCE:
CHARLOTTE MECKLENBURG COUTNY POLARIS GIS
WEBSITE ACCESSED APRIL 11, 2022
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
FORMER
LANDFILL
LOCATION
FIGURE 3
GROUNDWATER CONTOUR MAP
STATESVILLE AVE. MULTI-FAMILY DEVELOPMENT
STATESVILLE AVENUE AND WHITTINGTON STREET
CHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:17096-B
SOURCE:
CHARLOTTE MECKLENBURG COUTNY POLARIS GIS
WEBSITE ACCESSED APRIL 11, 2022
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY LEGEND
APPROXIMATE MONITORING WELL LOCATION INFERRED GROUNDWATER FLOW DIRECTION
FORMER
LANDFILL
LOCATION
MW-1
(661.05)
MW-2
(662.05)
MW-5
(649.43)
MW-4
(653.88)
MW-3
(662.83)
APPROXIMATE CALCULATED GROUNDWATER ELEVATIONAPPROXIMATE GROUNDWATER CONTOUR
650
655
660
649.43

TABLES

Table 1
Monitoring Well Construction Details and Groundwater Elevation Data
Statesville Avenue Multi-Family Development
3239/3245 Statesville Avenue and 2128/2129 Whittington Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No.: 49:17096-B
Monitoring
Well ID
Installation
Date
Casing
Depth
(ft bgs)
Screen Interval
(x to y ft bgs)
Total
Depth
(ft bgs)
Date
Measured
TOC
Elevation
(ft AMSL)
Depth-to-
Water
(ft BTOC)
Groundwater
Elevation
(ft AMSL)
MW-1 11/16/22 10.0 10.0 to 20.0 20.0 11/18/22 674.20 13.15 661.05
MW-2 11/16/22 10.0 10.0 to 24.0 24.0 11/18/22 677.49 15.41 662.08
MW-3 11/16/22 10.0 10.0 to 20.0 20.0 11/18/22 677.06 14.23 662.83
MW-4 11/17/22 5.0 5.0 to 15.0 15.0 11/18/22 663.47 9.59 653.88
MW-5 11/17/22 10.0 10.0 to 25.0 25.0 11/18/22 668.83 19.4 649.43
Notes:
ft bgs = feet below ground surface
TOC = top of casing
ft AMSL = feet above mean sea level
ft BTOC = feet below top of casing
TOC Elevations surveyed by Tidemark Land Services on December 20, 2022