WI0400308_Report of Geothermal Well Sampling_20210616

ROY COOPER
Governor
JOHN NICHOLSON
Interim Secretary
S. DANIEL SMITH
Director
Mr. Ron Henries
360 Spencer Miller Road
Deep Gap, North Carolina 28618
NORTH CAROLINA
Environmental Quality
June 16, 2021
SUBJECT: Laboratory Analytical Results
Geothermal Heating/Cooling Water Return Well
Permit No. WI0400308
Watauga County
Dear Mr. Henries:
On March 24, 2021, Jim Gonsiewski of the Division of Water Resources (DWR) collected groundwater
samples from the influent and effluent access points to your Geothermal Heating/Cooling Water Return Well.
The samples were sent to the DWR Central Laboratory in Raleigh, NC for analysis.
The samples were analyzed for fecal coliform, bromide, chloride, fluoride, sulfate, total dissolved solids,
nitrate and nitrite, aluminum, antimony, arsenic, barium, beryllium, calcium, cadmium, chromium, cobalt,
copper, iron, lead, magnesium, manganese, molybdenum, nickel, potassium, selenium, silver, sodium,
thallium, vanadium, and zinc. Laboratory analytical results from the samples did not detect any constituents
above the State of North Carolina 2L (NC2L) groundwater standards.
We appreciate your cooperation in the collection of these samples. If you have any questions, please contact
me at [phone] or via email at [e-mail].
Sincerely,
CDDocuSIgnsd by:
lCI��
� /91- aOtt Lit.,4, .t
E 197B66 F 179D4 5F...
James J. Gonsiewski, P.G.
Hydrogeologist
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ — WSRO
enc.: Laboratory Analytical Reports
cc: WSRO Electronic Files
Laserfiche Files
North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Office 1450 West Hanes Mill Road, Suite 300 I Winston-Salem, North Carolina 27105
336.776.9800

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AC82881 North Carolina Division of Water Resources Water Sciences Section Laboratory Results
Loc. Descr.:
County:
Region:
River Basin
Emergency
COC Yes/No
WI0400308 Henries Residence
Watauga Collector:
Winston-Salem Report To
NEU Collect Date:
Collect Time:
Sample Depth
J GONSIEWSKI
WSRO
03/24/2021
11:50
VisitlD
Location ID:
Priority
Sample Matrix:
Loc. Type:
Final Report
WSRO NLC
AMBIENT
GROUNDWATER
Water Supply
Sample ID:
PO Number #
Date Received:
Time Received:
Labworks LoginlD
Delivery Method
Final Report Date:
Report Print Date:
AC82881
03/25/2021
08:20
TASCENZOI
NC Courier
5/22/21
05/24/2021
If this report is labeled preliminary report, the results have not been validated. Do not use for Regulatory purposes.
CAS # Analyte Name
Sample temperature at receipt by lab
PQL
Result/
Qualifier
LAB
0.9
Units
°C
Method Analysis
Reference Date Validated by
3/25/21
MSWIFT
Coliform, MF Fecal in liquid
1
MIC
1 B2,Q1
CFU/100m1
SM 9222 D-1997 3/25/21 JJURGEVICH
E701177
NO2+NO3 as N in liquid
0.02
NUT
0.04
mg/Las N
EPA353.2 REV 2 3/31/21 AWILLIAMS
pH in Liquid by Nutrients
7.3
pH Units
3/25/21 ALWILLIAMS
24959-67-9 Bromide
04
WET
0.4 U
mg/L
EPA 300.0 rev2.1 4/16/21 ALWILLIAMS
16887-00-6 Chloride
1.0
2.2
mg/L
EPA 300.0 rev2.1 4/16/21 ALWILLIAMS
16984-48-8 Fluoride
0.4
0.4 U
mg/L
EPA 300.0 rev2.1 4/16/21 ALWILLIAMS
14808-79-8 Sulfate
2.0
2.0 U
mg/L
EPA 300.0 rev2.1
4/16/21 ALWILLIAMS
Total Dissolved Solids in liquid
12
69
mg/L
SM 2540 C-1997 3/29/21 ALWILLIAMS
7440-22-4 Ag by ICPMS
1.0
MET
1.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7429-90-5 Al by ICP
50
50 U
ug/L
EPA 200.7 Rev4 .4 4/14/21 JJURGEVICH
7440-36-0 Antimony by ICPMS
10
10 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-38-2 As by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-38-3 Ba by ICP
10
10 U
ug/L
EPA200.7 Rev4.4 4/14/21 JJURGEVICH
7440-41-7
Be by ICP
5.0
5.0 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-70-2 Ca by ICP
0.10
7.7
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-43-9 Cd by ICPMS
0.50
0.50 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-48-4 Cobalt by ICP
50
50 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-47-3 Cr by ICPMS
5.0
5.0 U
ug/L
EPA200.8 Rev5.4 4/14/21 JJURGEVICH
7440-50-8 Cu by ICPMS
2.0
270
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7439-89-6 Fe by ICP
50
50 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-09-7 K by ICP
0.10
1.3
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-93-2 Li ICP
25
25 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-95-4 Mg by ICP
0.10
1.2
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-96-5 Mn by ICP
10
10 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-98-7 Mo by ICPMS
10
10 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-23-5 Na by ICP
0.10
6.4
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-02-0 Ni by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7439-92-1 Pb by ICPMS
2.0
2.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7782-49-2 Se by ICPMS
1.0
1.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
WSS Chemistry Laboratory» 1623 Mail 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 PQL.
Page 1 of 3

Laboratory Section RsuCts/Samyfe Comments/Quarifler Definitions
Sample ID: AC82881
CAS #
7440-28-0
Analyte Name
Thallium (TI) ICPMS
PQL
2.0
Result!
Qualifier
2.0 U
Method
Units Reference
ug/L EPA 200.8 Rev5 4
Analysis
Date Validated by
4/14/21 JJURGEVICH
7440-62-2 V by ICP
10
10 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-66-6 Zn by ICPMS
10
27
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
Sample Comments
MIC:Fecal Coliform-B2-Counts from all filters = 0.
MIC:Fecal Coliform-Q1-Sample exceeded holding time prior to receipt at lab.
WSS Chemistry Laboratory» 1623 Mail 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 PQL.
Page 2 of 3

NC rD`i�'j1, La6oratory Section ljsufts/Sample Comments/QuafifierDefinitions
Sample ID: AC82881
CAS # Analyte Name
PQL
Result/
Qualifier
Units
Method
Reference
Analysis
Date Validated by
NCDEQ-WSS-Chemistry Lab Data Qualifiers
Al The reported value is an average, where at least one result is qualified with a "U". The PQL is used for the qualified result(S) to cal
B1 Coliform-Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters repor
B2 Coliform-Counts from all filters were zero. The value reported is based on the number of colonies per 100 ml that would have been
B3 Coliform-Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the smalle:
B4 Coliform-Filters have counts of both >60 or 80 and <20. Reported value is estimated or is a total of the counts on all filters reported
B5 Coliform-Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as >150 colonies.
B6 Coliform-Estimated Value. Blank contamination evident.
B7 Coliform-Many non-coliform or non-enterococcus colonies or interfering non-coliform or non-enterococcus growth present. In this cc
BB1 MPN-No wells or tubes gave a positive reaction. Value based upon the appropriate MPN Index and reported as a less than "<" valu
BB2 MPN-All wells or tubes gave positive reactions. Value based upon the MPN Index and reported as a greater than ">" value.
C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated.
G1 BOD-The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L.
G2 BOD-The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at lea:
G3 BOD-No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L.
G4 BOD-Evidence of toxicity. This is generally characterized by a significant increase in the BOD value as the sample concentration de
G5 BOD-The glucose/ glutamic acid standard exceeded the range of 198 ± 30.5 mg/L.
G7 BOD-Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value and is calculated foi
G8 BOD-Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is calculated for
G9 BOD-The DO depletion of the dilution water blank produced a negative value.
J1 Surrogate recovery limits have been exceeded.
J10 Unidentified peak; estimated value.
J11 The reported value is determined by a one -point estimation rather than against a regression equation. The estimated concentration
J12 The calibration verification did not meet the calibration acceptance criterion for field parameters.
J2 The reported value failed to meet the established quality control criteria for either precision or accuracy.
J3 The sample matrix interfered with the ability to make any accurate determination.
J4 The data is questionable because of improper laboratory or field protocols (e.g., composite sample was collected instead of grab, p
J5 Temperature limits exceeded (samples frozen or >6°C) during transport or not verifiable (e.g., no temperature blank provided): non-
J6 The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate.
J7 This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical instrument/method. Th
J8 Temperature limits exceeded (samples frozen or >6°C) during storage, the data may not be accurate.
J9 The reported value is determined by a one -point estimation rather than against a regression equation. The estimated concentration
M Sample and duplicate results are "out of control". The sample is non -homogenous (e.g., VOA soil). The reported value is the lower
N1 Presumptive evidence and estimated value. The component has been tentatively identified base on mass spectral library.
N2 There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e., presence of e
N3 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the labo
N4 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the labo
N5 The component has been tentatively identified based on a retention time standard.
P Elevated PQL* due to matrix interference and/or sample dilution.
Q1 Holding time exceeded prior to receipt by lab.
Q2 Holding time exceeded following receipt by lab.
S Not enough sample provided to prepare and/or analyze a method -required matrix spike (MS) and/or matrix spike duplicate (MSD).
U Indicates that the analyte was analyzed for but not detected above the reported practical quantitation limit`. The number value repo
U, J6 The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate.
UU Indicates that the analyte was not detected by a screen analysis. The number value was determined by a one -point estimation at tt
✓ Indicates the analyte was detected in both the sample and the associated method blank. Note: The value in the blank shall not be s
X1 Sample not screened for this compound.
X2 Sampled, but analysis lost or not performed -field error.
X3 Sampled, but analysis lost or not performed -lab error.
Y Elevated PQL* due to insufficient sample size.
Z1 Inability to analyze the sample.
Z2 Questions concerning data reliability.
WSS Chemistry Laboratory» 1623 Mail Service Center, Raleigh, NC 27699-1623 (919) 7333908
"Not Detected' or "U" does not indicate the sample is analyte free but that the analyte is not detected at or above the PQL.
Page 3 of 3

AC82888 North Carolina Division of Water Resources Water Sciences Section Laboratory Results
Loc. Descr.: W10400308 HENRIES RESIDENCE
County: Watauga Collector: J GONSIEWSKI VisitID
Region: Winston-Salem Report To WSRO Location ID: WSRO NLC
River Basin NEW Collect Date: 03/24/2021 Priority ROUTINE
Emergency Collect Time: 12:40 Sample Matrix: GROUNDWATER
COC Yes/No Sample Depth Loc. Type: Water Supply
Final Report
Sample ID: AC82888
PO Number #
Date Received: 03/25/2021
Time Received: 08:20
Labworks LoginlD MSWIFT
Delivery Method NC Courier
Final Report Date: 5/22/21
Report Print Date: 05/24/2021
If this report is labeled preliminary report, the results have not been validated. Do not use for Regulatory purposes.
CAS # Analyte Name
Sample temperature at receipt by lab
PQL
Result/
Qualifier
LAB
0.2
Units
°C
Method Analysis
Reference Date
Validated by
3/25/21 MSWIFT
Coliform, MF Fecal in liquid
1
MIC
1 B2,Q1 CFU/tooml
SM 9222 D-1997 3/25/21 JJURGEVICH
E701177
NO2+NO3 as N in liquid
NUT
0.02 0.04
mg/Las N
EPA 353.2 REV 2 3/31/21 AWILLIAMS
pH in Liquid by Nutrients
7.4 pH Units
3/25/21 ALWILLIAMS
24959-67-9 Bromide
0.4
WET
0.4 U
mg/L
EPA 300.0 rev2 1 4/16/21 ALWILLIAMS
16887-00-6 Chloride
1.0 1,0 U mg/L EPA 300.0 rev2.1 4/16/21 ALWILLIAMS
16984-48-8 Fluoride
0.4 0.4 U
mg/L EPA 300.0 rev2.1
4/16/21 ALWILLIAMS
14808-79-8 Sulfate
2.0 2.0 U mg/L EPA 300.0rev2.1 4/16/21 ALWILLIAMS
Total Dissolved Solids in liquid
12 59
mg/L
SM 2540 C-1997 3/29/21 ALWILLIAMS
7440-22-4 Ag by ICPMS
1.0
MET
1.0 U
ug/L
EPA200.8Rev5.4 4/14/21 JJURGEVICH
7429-90-5 Al by ICP
50 50 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-36-0 Antimony by ICPMS
10 10 U ug/L EPA 200.8Rev5 .4 4/14/21 JJURGEVICH
7440-38-2 As by ICPMS
2.0 2.0 U ug/L EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-38-3 Ba by ICP
10 10 U
ug/L
EPA200.7 Rev4.4 4/14/21 JJURGEVICH
7440-41-7
Be by ICP
5.0 5.0 U ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-70-2 Ca by ICP
0.10 7,5 mg/L EPA 200.7 Rev4 4
4/14/21 JJURGEVICH
7440-43-9 Cd by ICPMS
0.50 0.50 U
ug/L
EPA 200.8 Rev5 4 4/14/21 JJURGEVICH
7440-48-4 Cobalt by ICP
50 50 U ug/L EPA 200.7 Rev4.4
4/14/21 JJURGEVICH
7440-47-3 Cr by ICPMS
5.0 5.0 U ug/L EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-50-8 Cu by ICPMS
2.0 290
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7439-89-6
Fe by ICP
50 50 U ug/L EPA 200.7 Rev4.4
4/14/21 JJURGEVICH
7440-09-7 K by ICP
0.10 1.3
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-93-2 LI ICP
25 25 U ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-95-4
Mg by ICP
0.10 1.2
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7439-96-5 Mn by I C P
10 10 U ug/L EPA 200 7 Rev4.4 4/14/21 JJURGEVICH
7439-98-7 Mo by ICPMS
10 10 U ug/L EPA 200.8 Rev5.4
4/14/21 JJURGEVICH
7440-23-5 Na by I C P
0.10 6.3
mg/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-02-0 Ni by ICPMS
2.0 2.0 U
ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7439-92-1
Pb by ICPMS
2.0 2.0 U ug/L EPA 200 8 Rev5 4 4/14/21 JJURGEVICH
7782-49-2 Se by ICPMS
1.0 1.0 U ug/L
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
WSS Chemistry Laboratory» 1623 Mail 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 PQL.
Page 1 of 3

NC rUWR, Laboratory Section Wesufts/Sampee Comments/Qualifier (Definitions
Sample ID: AC82888
CAS # Analvte Name
7440-28-0 Thallium (TI) ICPMS
PQL
2.0
Result/
Qualifier
2.0 U
Units
ug/L
Method Analysis
Reference Date Validated by
EPA 200.8 Rev5.4 4/14/21 JJURGEVICH
7440-62-2 V by I C P
10
10 U
ug/L
EPA 200.7 Rev4.4 4/14/21 JJURGEVICH
7440-66-6 Zn by ICPMS
10
26
ug/L
EPA 200.8 Rev5.4
4/14/21 JJURGEVICH
Sample Comments
MIC:Fecal Coliform-B2-Counts from all filters = 0.
MIC:Fecal Coliform-Q1-Sample exceeded holding time prior to receipt at lab.
WSS Chemistry Laboratory» 1623 Mail 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 PQL.
Page 2 of 3

NC rDOR, Laboratory Section krsufts/Sample Comments/Qualifier(Definitions
Sample ID: AC82888
CAS # Analyte Name
PQL
Result/
Qualifier
Units
Method
Reference
Analysis
Date
Validated by
NCDEQ-WSS-Chemistry Lab Data Qualifiers
Al The reported value is an average, where at least one result is qualified with a "U". The PQL is used for the qualified result(S) to call
B1 Coliform-Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters repor
B2 Coliform-Counts from all filters were zero. The value reported is based on the number of colonies per 100 ml that would have been
B3 Coliform-Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the smalle:
B4 Coliform-Filters have counts of both >60 or 80 and <20. Reported value is estimated or is a total of the counts on all filters reported
B5 Coliform-Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as >150 colonies.
B6 Coliform-Estimated Value. Blank contamination evident.
B7 Coliform-Many non-coliform or non-enterococcus colonies or interfering non-coliform or non-enterococcus growth present. In this cc
BB1 MPN-No wells or tubes gave a positive reaction. Value based upon the appropriate MPN Index and reported as a less than "<" valu
BB2 MPN-All wells or tubes gave positive reactions. Value based upon the MPN Index and reported as a greater than ">" value.
C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated.
G1 BOD-The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L.
G2 BOD-The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at lea:
G3 BOD-No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0 mg/L.
G4 BOD-Evidence of toxicity. This is generally characterized by a significant increase in the BOD value as the sample concentration de
G5 BOD-The glucose/ glutamic acid standard exceeded the range of 198 ± 30.5 mg/L.
G7 BOD-Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value and is calculated foi
G8 BOD-Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is calculated for
G9 BOD-The DO depletion of the dilution water blank produced a negative value.
J1 Surrogate recovery limits have been exceeded.
J10 Unidentified peak; estimated value.
J11 The reported value is determined by a one -point estimation rather than against a regression equation. The estimated concentration
J12 The calibration verification did not meet the calibration acceptance criterion for field parameters.
J2 The reported value failed to meet the established quality control criteria for either precision or accuracy.
J3 The sample matrix interfered with the ability to make any accurate determination.
J4 The data is questionable because of improper laboratory or field protocols (e.g., composite sample was collected instead of grab, p
J5 Temperature limits exceeded (samples frozen or>6°C) during transport or not verifiable (e.g., no temperature blank provided): non-
J6 The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate.
J7 This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical instrument/method. Th
J8 Temperature limits exceeded (samples frozen or >6°C) during storage, the data may not be accurate.
J9 The reported value is determined by a one -point estimation rather than against a regression equation. The estimated concentration
M Sample and duplicate results are "out of control". The sample is non -homogenous (e.g., VOA soil). The reported value is the lower
N1 Presumptive evidence and estimated value. The component has been tentatively identified base on mass spectral library.
N2 There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e., presence of s
N3 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the labo
N4 This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is less than the labo
N5 The component has been tentatively identified based on a retention time standard.
P Elevated PQL* due to matrix interference and/or sample dilution.
Q1 Holding time exceeded prior to receipt by lab.
Q2 Holding time exceeded following receipt by lab.
S Not enough sample provided to prepare and/or analyze a method -required matrix spike (MS) and/or matrix spike duplicate (MSD).
U Indicates that the analyte was analyzed for but not detected above the reported practical quantitation limit*. The number value repo
U, J6 The laboratory analysis was from an unpreserved or improperly chemically preserved sample. The data may not be accurate.
UU Indicates that the analyte was not detected by a screen analysis. The number value was determined by a one -point estimation at tt
✓ Indicates the analyte was detected in both the sample and the associated method blank. Note: The value in the blank shall not be s
X1 Sample not screened for this compound.
X2 Sampled, but analysis lost or not performed -field error.
X3 Sampled, but analysis lost or not performed -lab error.
Y Elevated PQL* due to insufficient sample size.
Z1 Inability to analyze the sample.
Z2 Questions concerning data reliability.
WSS Chemistry Laboratory» 1623 Mail 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 PQL.
Page 3 of 3