WI0500414_Correspondence_20220114

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH
Director
Sarah Cohen
410 Whitehead Circle
Chapel Hill, N.C. 27514
NORTH CAROLINA
Environmental Quality
January 14, 2022
Re: Geothermal Permit Renewal Inspection
Cohen & Diering SFR
410 Whitehead Cir.
Chapel Hill, NC -Orange County
Permit #WI0500414
Dear Mrs. Cohen:
A groundwater sample was collected from your geothermal well system and submitted to the
Division of Water Resources Water Sciences Laboratory for analysis on October 13, 2021. A sample was
collected at the influent tap (sample #AC90246-results attached).
The sample analysis report indicates that the following substances (but not limited to) were
detected in the influent sample: Copper was detected at 310 parts per billion (ug/L) and zinc was detected
at 320 ug/L. The detections of copper and zinc do not exceed the 15A NCAC 02L .0202 groundwater
standards established at 1000 ug/L for both copper and zinc.
A copy of the test results will be sent to the DWR, Classifications and Standards Branch for an
evaluation regarding the water sample and the results will be mailed to you.
If you have any questions regarding the results, please contact me at [phone].
Sincerely,
Eric Rice, Hydrogeologist
Division of Water Resources
Water Quality Regional Operations
Raleigh Regional Office
c . Laserfiche
Orange County Health Department
Central Office, Groundwater Resources Section
North Carolina Department of Environmental Quality I Division of Water Resources
Raleigh Regional Office 13800 Barrett Drive I Raleigh, North Carolina 27609
919.791.4200

AC90246 North Carolina Division of Water Resources Water Sciences Section Laboratory Results
Loc. Descr.: COHEN & DIERING SFR 410 WHITEAD CIR. CHAPEL HILL
County: Oranoe Collector, E RICE
Region: Raleigh Report To RRO
River Basin Collect Date: 10/13/2021
Emergency Collect Time: 12:00
COC Yes/No Sample Depth
Visi1ID
Location ID:
Priority
Sample Matrix:
Loc. Type:
Final Report
if this report is labeled preliminary report, the results have not been validated. Do not use for Regulatory purposes.
5P068WI0500414INF
COMPLIANCR
GROUNDWATER
Water Seemly
Sample ID AC90246
PO Number 0
Date Received 10/1312021
Time Received: 13:45
Labworks Login D (IIISWIFT
Delivery Method Hand Delivered
Final Report Date 11/23/21
Report Print Date: 11129/2021
CAS # Analvte Name
Sample temperature at receipt by lab
Result/
Qualifier
LAB
0.8
Units
Method Analysis
Reference Date Validated by
10:13/21 ESTAFFORDI
14797-55-8 Nitrate as N in liquid
0.02
NUT
2.9
mg/L as N
EPA353.2 REV 2 10/21.21 ALuMLLIAMS
14797-65-0 Nitrite as N in liquid
0.01 0.01 U mg/L as N
EPA353.2 REV 2
10/14/21 ALVNLLIAMS
E701177
NO2+NO3 as N in liquid
0.1
2.9 P
mg/L as N
EPA353.2 REV 2
10+19/21 ALWILLIAMS
24959-67-9 Bromide
WET
0.4 0.4 U mg/L
EPA 300.0 rev2.1
10/21/21 ALIMLLIAMS
16887-00-6 Chloride
1.0
13
mg/L
EPA 300.0 rev2.1
10/21/21 ALIMLLIAMS
16984-48-8 Fluoride
0.4
0.4 U
mg/L
EPA 300.0 rev2.1
10/21/21 ALW1LLIAMS
14808-79-8 Sulfate
2.0
16
mg/L
EPA 300.0 rev2 1
10/21/21 ALWILLIAMS
7440-22-4 Ag by ICPMS
1.0
MET
1.0 U
ug/L
EPA 200 8 Rev5 4 10/28/21 JJURGEVICH
7429-90-5 Al by ICP
50
50 U
ug/L
EPA200 7 Rev4 4 10/21/21 JJURGEVICH
7440-36-0 Antimony by ICPMS
10
10 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7440-38-2 As by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 10/28/21 JJURGEVICH
7440-38-3 Ba by ICP
10
10 U
ug/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7440-41-7 Be by ICP
5.0
5.0 U
ug/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7440-70-2 Ca by ICP
0.10
15
mg/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7440-43-9 Cd by ICPMS
0.50
0.50 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7440-48-4 Cobalt by ICP
50
50 U
ug/L EPA200.7 Rev4.4 10/21/21 JJURGEVICH
7440-47-3 Cr by ICPMS
5.0 5.0 U ug/L EPA200.8 Rev5.4 10/26/21 JJURGEVICH
7440-50-8 Cu by ICPMS
2.0
310 P
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7439-89-6 Fe by ICP
50
65
ug/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7439-97-6 Hg 245.1
0.20
0.20 U
ug/L
EPA 245.1 Rev3 10/20/21 JJURGEVICH
7440-09-7 K by ICP
0.10 0.49 mg/L EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7439-93-2 Li ICP
25 25 U ug/L EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7439-95-4 Mg by ICP
0.10 6.3 mg/L EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7439-96-5 Mn by ICP
10
10 U
ug/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7439-98-7
Mo by ICPMS
10
10 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7440-23-5 Na by ICP
0.10
14
mg/L
EPA 200.7 Rev4.4 10/21/21 JJURGEVICH
7440-02-0 Ni by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7439-92-1 Pb by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7782-49-2 Se by ICPMS
1.0
1.0 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
7440-31-5 Sn by ICPMS
10
10 U
ug/L
EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
WSS Chemistry Laboratory» 1823 Mall Service Center, Raleigh, NC 27899.1823 [phone]
"Not Detected" or "U" does not indicate the sample is analyte free but that the analyte is not detected at or above the POL.
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WC rD14 , Laboratory Section Vsu1 s/Sample Comments/QuaTfier(D initions
Sample ID: AC90248
CAS #
7440-24-8
Analvte Name
Sr by ICPMS
E
Result/
Qualifier
10 150 P
Method
Units Reference
ug/L EPA 200.8 Rev5.4
Analysis
Date Validated by
10/26/21 JJURGEVICH
7440-28-0 Thallium (TI) ICPMS
2.0 2.0 U ug/L EPA200.8 Rev5.4 10/26/21 JJURGEVICH
7440-32-6 Ti (Titanium) by ICP
10 10 U ug/L EPA200.7 Rev4.4 10/21/21 JJURGEVICH
7440-62-2 V by ICP
10
10 U ug/L EPA200.7 Rev4.4 10/21/21 JJURGEVICH
7440-66-6 Zn by ICPMS
10 320 P ug/L EPA 200.8 Rev5.4 10/26/21 JJURGEVICH
WSS Chemistry Laboratory» 1623 Mali Service Center, Raleigh, NC 27699-1623 [phone]
"Not Detected" or "U" does not indicate the sample is analyte free but that the analyte is not detected at or above the PC/
Page 2 of 2