WI0500180_Compliance Evaluation Inspection_20240116

DocuSign Envelope ID: DDOB2216-8344-4E35-B90E-3COE018F9CE1
ROY COOPER Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
January 16, 2024
Amy Rogers
NP Loden Durham, LLC
c/o York Properties Incorporated
2108 Clark Avenue
Raleigh, NC 27605
Sent Via Email
Subject: Laboratory Analytical Results for Geothermal Well Sampling
Permit W10500180
102 City Hall Plaza/200 North Mangum Street
Durham, NC 27701— Durham County
Ms. Rogers:
On August 8, 2023, Michael Hall, Blake Butcher, Timothy Clark, Elaine Wild, and Kristina Morales of the
Division of Water Resources (DWR), Raleigh (RRO) visited the above -referenced site to evaluate
compliance with regard to above -referenced geothermal well permit and to collect water samples from
the geothermal well system. A follow-up site visit including Michael Hall, Timothy Clark, and Elaine Wild
was required on October 27, 2023 to complete sampling. We greatly appreciate the assistance of Chris
Loyd from Trademasters, who met the team on site for both site visits, and provided them with access
to the wells and equipment.
This compliance evaluation was in support of renewal of the geothermal well permit, which was granted
December 12, 2023. The system includes three, open -loop, geothermal wells (Figure 1) used for heating
and cooling of the two buildings on the property. The evaluation included:
• Inspection of the well completions for well W1, W2, and W3.
• Inspection of the piping and sample ports associated with the geothermal wells.
• Sampling of water from the influent and effluent pipes associated with the geothermal system
associated with each well.
• Review of the laboratory analytical data for the sampling.
During the initial site visit on August 8, only wells identified as W2 and W3 (Figure 1) could be located.
Furthermore, samples could only be collected from the geothermal system identified as "1"
(photographs), located in basement of the Southern building. The geothermal system identified as "2"
was also located in this building, but was not operational during the initial site visit, and could not be
sampled. The third geothermal system is located in the basement of the Northern building, which was
not accessible during the initial site inspection. The follow-up site visit was performed following
location of the well identified as W1 (Figure 1), and repair of the geothermal system identified as "2".
The team was also able to access the basement of the Northern building, and obtained a sample from
the system located there, presumably associated with well W3.
The following observations were made during this evaluation:
D E Q ,fJ North Carolina Department of Environmental Quality I Division of Water Resources
Raleigh Regional Office 1 3800 Barrett Drive I Raleigh, North Carolina 27609
NORTHCAROUNA 919.791.4200
Department ofEnvlronmantal Duali�