WI0500013_Compliance Evaluation Inspection_20230919

DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
ROY COOPER Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
September 19, 2023
Ms. Diana McElroy
1111 Monterey Valley Drive
Chapel Hill, NC 27516
Sent Via Email
Subject: Geothermal Well Renewal
Permit # W10500013
Summary of Inspection and Sampling on August 22, 2023
Ms. McElroy:
In support of your request for renewal of the above -referenced geothermal well permit, Michael Hall from
the Division of Water Resources Performed an inspection and collected samples from the well effluent
and geothermal system discharge on August 22, 2023. The permittee, Diana McElroy was present during
the inspection, and identified the location of the well, and geothermal system discharge (see attached site
plan). The well is used for both potable water, and for two geothermal units serving the residence. During
the inspection, one of the geothermal units, serving the downstairs, was not working and Ms. McElroy
indicated that it was due to be repaired. The other unit, serving the upstairs of the residence, was running
during the inspection, actively drawing water from the well, and discharging to surface water.
The well vault was in good condition and was secure at the time of the inspection (see attached
photographic log). The inside of the vault was stuffed with fiberglass insulation, which was falling apart,
and contained an ant nest. The wellhead appeared to be secure. The pipes and wires leading to the well
were sound, although corroded. No well plate was observed. The inspector recommended the use of
foam insulation, as opposed to fiberglass to avoid the mess and moisture retention within the well vault.
Based on this recommendation, the permittee asked the inspector to leave the insulation out of the well
vault. Two discharge pipes lead from the well. According to the permittee one is for the water supply,
and one is for the geothermal unit; although the pipes were not labeled, and which pipe led to which
service could not be determined.
The discharge consisted of a 4-inch PVC pipe with a small pool around it. Flow was observed into the pool
at the time of the inspection. The water was clear, and was running downhill to a stream to the North of
the residence. The inspector recommended to the permittee that the discharge area be kept clear of
vegetation, and that the pool be removed, to limit the potential for water to back up into the pipe.
Water samples were collected from the well head and the discharge. The well head was sampled using a
hose (provided by the permittee) attached to one of the sampling ports on the discharge pipes described
above. The well was purged for at least 20 minutes prior to sampling. The discharge from the geothermal
unit was sampled by dipping water from the pool surrounding the discharge pipe with a clean sample
bottle and decanting into sample bottles for the laboratory. Samples were delivered to the Division of
Water Resources Laboratory on August 22, 2023.
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�

DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
Water quality measurements were collected prior to sampling from both the well effluent and discharge.
These measurements were within the expected range for natural groundwater:
Sample
Temperature
(DC)
pH (s.u.)
Dissolved
Oxygen (mg/1)
Specific
Conductivity
Salinity (ppt)
(umhos/cm)
W1 Effluent
16.48
6.82
5.59
194.37
0.09
W1 Discharge
19.24
7.49
6.27
182.20
0.09
The measurements are relatively similar between the well effluent and the system discharge, with the
exception that the temperature, pH and dissolved oxygen was slightly higher.
Laboratory analytical results were below the North Carolina Groundwater Standards (NCAC 15A.02L), with
the exception of total and fecal coliform. Both total and fecal coliform should not be detected in
groundwater, and the detection of these parameters is likely the result of contamination from the use of
the hose, and not representative of an impact to the well. The detection of total and fecal coliform in the
discharge in not unexpected, given that the sample, by necessity, was drawn from a vegetated, small pond
surrounding the discharge pipe, and the water was in contact with soil and vegetation.
Neither the field measurements or the laboratory results suggest a concern regarding groundwater
quality, and the continued use of the well for both a potable supply, and geothermal air conditioning is
appropriate.
We appreciate your assistance during the inspection, and if you have any questions regarding this report
or its conclusions, please contact Michael Hall at [phone] or via email [e-mail].
Sincerely,
ocuSigned by:
E�D
a -e, i�l.atn ALL
2916E6AB32144F...
Vanessa E. Manuel, Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
Enclosure Site Plan
Photographic Log
Laboratory Analytical Reports
cc: Laserfiche
NORTH CAROLINAD_E Q>
Depanmem of Envlmnmenml Oual�
North Carolina Department of Environmental Quality I Division of Water Resources
Raleigh Regional Office 1 3800 Barrett Drive I Raleigh, North Carolina 27609
919.791.4200

DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79Cl6B
Geothermal Well Inspection
Permit Number1 111
Monterey1111 •County
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3
f� ti.<� t 1
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its it ,.''{ • i`�{�jy'• �Y -'
0 200�1 t 400 Feet
Legend
Parcel Boundaries
Approxi.mate'Gediber
1
o-.77,11D_E Q
Map provided by NCDEQ Division of Water Resources.
Locations are approximate and are provided for reference only.

DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
W10500013 — 1111 Monterey Valley Drive Geothermal Well Permit Renewal
Chapel Hil:
Photograph 1
Photograph 2
View to South of well vault.
View into well vault showing insulation debris and ants, as well as pump
lines for e• and water supply.
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DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
W10500013-1111Monterey Valley Drive Geothermal Well Permit Renewal"'^
Chapel Hill/Orange
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Photograph 3
Photograph 4
View South of vegetation around discharge for geothermal unit.
View of small pool around discharge pipe
for geothermal unit.
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DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
AD13413 North Carolina Division of Water Resources Water Sciences Section Laboratory Results
Loc. Descr.:
1111 MONTEREY VALLEY DRIVE
County:
Orange Collector:
M HALL
VisitlD
Region:
Raleigh Report To
RRO
Location ID:
W1 EFFLUENT
River Basin
CPF Collect Date:
08/22/2023
Priority
COMPLIANCE
Emergency
Collect Time:
11_23
Sample Matrix:
GROUNDWATER
COC Yes/No
Sample Depth
Loc. Type:
Water Supply
Final Report
If this report is labeled preliminary report, the results have not been validated. Do not use for Regulatory purposes.
Result/ Method Analysis
CAS # AnalVte Name PQL Qualifier Units Reference Date Validated by
LAB
Sample temperature at receipt by lab 0.4 °C 8/22/23 MSWIFT
Conform, MF Fecal in liquid
1
MIC
1 B2
CFU/100ml
SM 9222 D-1997
8/22/23
JJURGEVICH
Conform, MF Total in liquid
1
48
CFU/100ml
SM 9222 B-1997
8/22/23
JJURGEVICH
E701177
NO2+NO3 as N in liquid
0.03
NUT
0.78
mg/L as N
EPA 353.2 REV 2
8/30/23
ALWILLIAMS
24959-67-9
Bromide
0.4
WET
0.4 U
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
16887-00-6
Chloride
1.0
4.7
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
16984-48-8
Fluoride
0.4
0.4 U
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
14808-79-8
Sulfate
2.0
3.1
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
Total Dissolved Solids in liquid
12.5
148
mg/L
SM 2540 C-1997
8/29/23
ALWILLIAMS
7440-22-4
Ag by ICPMS
1.0
MET
1.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7429-90-5
Al by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-38-2
As by ICPMS
2.0
2.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-70-2
Ca by ICP
0.10
21
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-43-9
Cd by ICPMS
0.50
0.50 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-48-4
Cobalt by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-47-3
Cr by ICPMS
5.0
5.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-50-8
Cu by ICPMS
2.0
8.2
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7439-89-6
Fe by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-09-7
K by ICP
0.10
0.83
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7439-95-4
Mg by ICP
0.10
7.1
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7439-96-5
Mn by ICP
10
10 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-23-5
Na by ICP
0.10
10
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-02-0
Ni by ICPMS
2.0
2.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7439-92-1
Pb by ICPMS
2.0
2.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7782-49-2
Se by ICPMS
1.0
1.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-66-6
Zn by ICPMS
10
10 U
ug/L
EPA200.8 Rev5.4
9/6/23
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

DocuSian Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
V NCDW(, Laboratory Section (esufts/Sampfe Comments/QuarifierDefinitions
Sample ID: AD13413
I Result/ Method Analysis
Qualifier Units Reference Date Validated by
Sample Comments
IC:Fecal Coliform-62-Counts from all filters = 0.
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.
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 Col iform-Esti mated 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.
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

DocuSian Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
V NCDW(, Laboratory Section (esutts/Sampte Comments/QuarifierDefinitions
Sample ID: AD13413
I Result/ Method Analysis
� I Qualifier Units Reference Date Validated by
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 'but 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
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 tf
V 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.
J13 Standards used for this analyte are from an uncertified source. These are the only standards currently available for the analyte.
WSS Chemistry Laboratory>> 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
"Not Detected" or " Ll" does not indicate the sample is analyte free but that the analyte is not detected at or above the PQL.
Page 3 of 3

DocuSign Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
AD13414 North Carolina Division of Water Resources Water Sciences Section Laboratory Results
Loc. Descr.:
1111 MONTEREY VALLEY DRIVE
County:
Orange Collector:
M HALL
VisitlD
Region:
Raleigh Report To
RRO
Location ID:
W1 DISCHARGE
River Basin
CPF Collect Date:
08/22/2023
Priority
COMPLIANCE
Emergency
Collect Time:
12_01
Sample Matrix:
GROUNDWATER
COC Yes/No
Sample Depth
Loc. Type:
Water Supply
Final Report
If this report is labeled preliminary report, the results have not been validated. Do not use for Regulatory purposes.
Result/ Method Analysis
CAS # AnalVte Name PQL Qualifier Units Reference Date Validated by
LAB
Sample temperature at receipt by lab 0.4 °C 8/22/23 MSWIFT
Conform, MF Fecal in liquid
1
MIC
1 B2
CFU/100ml
SM 9222 D-1997
8/22/23
JJURGEVICH
Conform, MF Total in liquid
1
3500 B3
CFU/100ml
SM 9222 B-1997
8/22/23
JJURGEVICH
E701177
NO2+NO3 as N in liquid
0.03
NUT
0.79
mg/L as N
EPA 353.2 REV 2
8/30/23
ALWILLIAMS
24959-67-9
Bromide
0.4
WET
0.4 U
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
16887-00-6
Chloride
1.0
4.7
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
16984-48-8
Fluoride
0.4
0.4 U
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
14808-79-8
Sulfate
2.0
3.3
mg/L
EPA300.0 rev2.1
8/28/23
ALWILLIAMS
Total Dissolved Solids in liquid
12.5
137
mg/L
SM 2540 C-1997
8/29/23
ALWILLIAMS
7440-22-4
Ag by ICPMS
1.0
MET
1.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7429-90-5
Al by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-38-2
As by ICPMS
2.0
2.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-70-2
Ca by ICP
0.10
20
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-43-9
Cd by ICPMS
0.50
0.50 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-48-4
Cobalt by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-47-3
Cr by ICPMS
5.0
5.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-50-8
Cu by ICPMS
2.0
25
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7439-89-6
Fe by ICP
50
50 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-09-7
K by ICP
0.10
0.86
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7439-95-4
Mg by ICP
0.10
6.8
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7439-96-5
Mn by ICP
10
10 U
ug/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-23-5
Na by ICP
0.10
10
mg/L
EPA200.7 Rev4.4
8/29/23
JJURGEVICH
7440-02-0
Ni by ICPMS
2.0
2.7
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7439-92-1
Pb by ICPMS
2.0
2.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7782-49-2
Se by ICPMS
1.0
1.0 U
ug/L
EPA200.8 Rev5.4
9/6/23
JJURGEVICH
7440-66-6
Zn by ICPMS
10
10 U
ug/L
EPA200.8 Rev5.4
9/6/23
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

DocuSian Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
V NCDW(, Laboratory Section (esufts/Sampfe Comments/QuarifierDefinitions
Sample ID: AD13414
I Result/ Method Analysis
Qualifier Units Reference Date Validated by
Sample Comments
IC:Fecal Coliform-62-Counts from all filters = 0.
IC:Total Coliform-133-Counts >60 or >80 colonies.
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.
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 Col iform-Esti mated 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.
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

DocuSian Envelope ID: 22545EBB-EE51-4116-8CDC-BDD4BA79C16B
V NCDW(, Laboratory Section (esutts/Sampte Comments/QuarifierDefinitions
Sample ID: AD13414
I Result/ Method Analysis
� I Qualifier Units Reference Date Validated by
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 'but 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
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 tf
V 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.
J13 Standards used for this analyte are from an uncertified source. These are the only standards currently available for the analyte.
WSS Chemistry Laboratory>> 1623 Mail Service Center, Raleigh, NC 27699-1623 [phone]
"Not Detected" or " Ll" does not indicate the sample is analyte free but that the analyte is not detected at or above the PQL.
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