NC0000396_Settlement Agreement Activity_20170918

p� DUKE
�, ENERGY®
Mr. Jeff Poupart, Section Chief
NC DWR Permitting Section
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Mr. Poupart,
RECEIVEMCDENWR
September 18, 2017 SEP 222017
Water Quality
Permitting Section
Subject: Settlement Agreement activity
Asheville and Belews Creek stations
In accordance with Condition II. B. of the September 29, 2015 Settlement Agreement between Duke
Energy and the North Carolina Department of Environmental Quality, Duke Energy is required to
implement accelerated groundwater remediation at the Asheville and Belews Creek stations.
Plans have been developed and work is underway to comply with this requirement. Duke anticipates a
need to begin groundwater extraction in support of accelerated remediation in the fourth quarter of 2017
in order to comply with the agreement. It currently appears that this may occur before renewed NPDES
permits will be finalized for either site
Until NPDES permits can be finalized, Duke Energy request written concurrence of our previously
discussed understanding that groundwater extracted for the purpose of complying with the terms
of the subject agreement, can be routed to the ash basin system and/or released through permitted
outfalls under existing NPDES permit coverage. This follows the approach in the Settlement
Agreement, where discharge to either the ash basin or a permitted outfall is explicitly
authorized/recognized at Sutton. The release of this water will not significantly change the characteristics
of the discharge and will not result in flow volumes in excess of volumes previously released.
Maximum Design flows for extracted groundwater at Asheville are 0.1296 MGD. The well data that is
most applicable for evaluation of what is to be extracted at Asheville is found in well EXT-Olon the
attached The design flows for the groundwater extraction system at Belews Creek are 0.072 MGD. The
well data that is most applicable for evaluation of what is to be extracted at Belews is found in well
cluster GWA-20 on the attached. Both the Asheville and Belews Creek systems can operate in a variable
mode and will not operate if there is no yield in the well. If no permitting pathway for the release of
extracted groundwater is allowed, Duke Energy's ability to implement expedited groundwater
remediation at these sites will be materially impaired
Thank you for your attention to this request. If there are any questions about this matter, please contact
me at [phone] or shannon.langley a,duke-energy.com.
Sincerely,
E. Shannon Langley
Lead Environmental Specialist

Attachment
Cc. Richard Baker w/attachment via email
Joyce Dishmon/Filenet w/attachment via email
Tina Woodward/Filenet w/attachment via email
Anne Pifer

Table 1-1
Summary of Select Constituent Analytical Data in Area of Interest
Belews Creek Steam Station
Duke Energy Carolinas, LLC, Belews Creek, NC
Notes: Preparea Dy: tsuw (..necked: gut
* Analytical data provided by HDR, Inc.
Bold highlighted concentration indicates exceedance of the 15A NCAC
O2L Standard.
< = Concentration not detected at or above the reporting limit
j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection
Limit (MDL) and therefore concentration is estimated.
mg/L = Milligram per liter
ug/L = Microgram per liter
P:\Duke Energy Progress. 1026\20. BELEWS CREEK\04. CCP Accelerated Rem, Interim Action Plan - Design & Dev\30 PERCENT
DESIGN\Table 1-1 Data Summary AOI Page 1 of 1
Analytical Parameter
Boron
Chloride
Selenium
TDS
Reporting Units
ug/L
mg/L
ug/L
mg/L
15A NCAC O2L Standard
700
250
20
500
Sample ID
Sample
Collection Date
Analytical Results
AB -1S
9/20/2016
14,900
458
8.4
1,260
AB -1D
9/20/2016
13,000
459
13.8
1,250
AB-1BR
5/13/2016
12,100
0.4
<5
1.1
GWA-1BR
9/28/2016
<50
2.9
<0.5
113
GWA-1D
9/22/2016
26.9 J
50.7
0.5
190
GWA-1S
9/21/2016
428
51.5
0.41J
94
GWA-10D
9/21/2016
<50
21.7
<0.5
228
GWA-10S
9/21/2016
84.2
66.1
31.8
153
GWA-11D
9/21/2016
69.4
203
<0.5
576
GWA-11S
9/21/2016
379
157
7.3
441
GWA-18D
9/21/2016
<50
7.9
<0.5
94
GWA-18S
4/27/2016
28 J
21.5
0.53
125
GWA-18SA
6/8/2016
112
56.6
0.71
169
GWA-19BR
9/26/2016
28.6 J
5.9
0.52
83
GWA-19SA
9/21/2016
1,880
202
36.8
379
GWA-19D
4/28/2016
<50
3
0.31 J
90
GWA-19S
5/11/2016
1,320
157
30.9
299
GWA-20SA
9/21/2016
11,300
486
3
1,240
GWA-2OBR
6/20/2016
51
26.4
0.59
191
GWA-20D
9/21/2016
8,700
471
0.83
1,120
GWA-21D
9/21/2016
125
190
<0.5
545
GWA-21S
9/21/2016
126
150
6.3
267
GWA-27BR
6/16/2016
<50
6
<5
145
GWA-27D
6/16/2016
5,420
393
<5
990
GWA-27S
6/17/2016
155
51.9
5.8
108
GWA-30D
9/22/2016
<50
3.6
<0.5
146
GWA-30S
9/22/2016
<50
3.9
<0.5
48
GWA-31D
9/22/2016
<50
1.9
<0.5
97
GWA-31S
9/22/2016
<50
2.5
<0.5
<25
S-2
10/18/2016
236
74
<1
220
S-3
10/18/2016
<50
4.9
<1
120
S-4
10/18/2016
<50
82
<1
270
S-5
10/18/2016 1
<50
1 3.4
1 <1 1
120
Notes: Preparea Dy: tsuw (..necked: gut
* Analytical data provided by HDR, Inc.
Bold highlighted concentration indicates exceedance of the 15A NCAC
O2L Standard.
< = Concentration not detected at or above the reporting limit
j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection
Limit (MDL) and therefore concentration is estimated.
mg/L = Milligram per liter
ug/L = Microgram per liter
P:\Duke Energy Progress. 1026\20. BELEWS CREEK\04. CCP Accelerated Rem, Interim Action Plan - Design & Dev\30 PERCENT
DESIGN\Table 1-1 Data Summary AOI Page 1 of 1

TABLE 2-2
BENCHMARK DATA
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Prepared By: BI:R Checked By: BM
-Bold hiphlightetl concentration indiotes exceed,nce d the 15A NGC 021 Standard, appendl. 2, April 1, 2013.
®®®®©®®®®®®®®®®®®®®®®®®®®®®®®®®®mo®®®®
- Bold highlighted concentration indicates escsedance the 15A NUC 02B/EPA H.— Health Criteria, 2016(NC), 2016(EPA).
- Bold highlighted concentration indicates evcsedance than the ISA NUC 02B/EPA Ecological -tans, 2016(NC), 2016(EPA).
Temp - Temperature ORP = Oxidation -Reduction Pdptlal S.U. = Stand,re Unit umhos/cm - Mkro mhos per centimeter DIS = Di.,Wi wj
mq - WL -Milligram nitrogan
per bier NE = Not established
Spec Cond - Specific Conductance Eb = Redox Potential It = Fans mV = Millivolts TOT- Total
ug/L = Microgram per In.,
NA = Not analyted
DO - Dissolved oxygen DUP = Duplicate Dp C = Degrees Celsius H111 - Nephelomerk turbidity ,it pci/I - picocunes Dar liter
mg/L-Milligram per liter
NM = Hot measured
- NC DHHS Health Screening Leve.
- Concentration not detected at or above the reporting limlt
- Interim Maximum Allowable Concentrations (IMAM d the 15A NUC 02L Standard, Appendix 1, April 1, 2013.
Target analyte detected method ethod blank at or above the reporting limit.
::
L3 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high.
- T.ryet ...lyle dei«lee in method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10% the...... ration in the method blank. An,lyte concentration in sample is not aRe,tes by blank contamination.
L3 - Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting Ilmite In associated samplas. Reaults n.f." by high blas.
B2 - Target analyte was detected in blank(,) al a concentration greater than 1/2 the nap—mo limit but less than the rportinq limit. Analyte concentration in sample is valid and may be used for compliance purposes.
M1 = Matrix spike recovery was highthe assocleed Laboratory Control Spike (LCS) was acceptable.
CL - The continuing calibration for this compound is outside d P... Analytkal ....planrc limits.
M2 = Matrix spike recovery was Low. the 11—iated Laboratory Control Spike (LCS) w s ac«ptable.
CR = The dissolvetl metal reault was greater than the total metal result for this alempt. Reaulta ware confirmed by reanalysis.
M3 = Matrix spike recovery was outside laborctery control limits due to matrix interhrences.
03 - Sample was diluted due to the presence of high levels oirton-target analytes or other matrix interference.
Me = The spike recovery v+lue was unusable since the analyte concentration in the sample was disproportionate to the spike level.
j- Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detadion Limit (MDL) and therefore concentration Is estimated.
N3 = This sample was inadvertently collected with sample running through the flow cell and should be considered Invalid based on possible contamination Rom the Row cell.
H] - Analyst, conducted outside the EPA method holding time.
N2 = The lab does not hold accredll.b.. for this parameter.
5 = Associated calibration check did not meet sp.clfl.d criteria.
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Prepared By: BI:R Checked By: BM
-Bold hiphlightetl concentration indiotes exceed,nce d the 15A NGC 021 Standard, appendl. 2, April 1, 2013.
- Bold highlighted concentration indicates escsedance the 15A NUC 02B/EPA H.— Health Criteria, 2016(NC), 2016(EPA).
- Bold highlighted concentration indicates evcsedance than the ISA NUC 02B/EPA Ecological -tans, 2016(NC), 2016(EPA).
Temp - Temperature ORP = Oxidation -Reduction Pdptlal S.U. = Stand,re Unit umhos/cm - Mkro mhos per centimeter DIS = Di.,Wi wj
mq - WL -Milligram nitrogan
per bier NE = Not established
Spec Cond - Specific Conductance Eb = Redox Potential It = Fans mV = Millivolts TOT- Total
ug/L = Microgram per In.,
NA = Not analyted
DO - Dissolved oxygen DUP = Duplicate Dp C = Degrees Celsius H111 - Nephelomerk turbidity ,it pci/I - picocunes Dar liter
mg/L-Milligram per liter
NM = Hot measured
- NC DHHS Health Screening Leve.
- Concentration not detected at or above the reporting limlt
- Interim Maximum Allowable Concentrations (IMAM d the 15A NUC 02L Standard, Appendix 1, April 1, 2013.
Target analyte detected method ethod blank at or above the reporting limit.
::
L3 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high.
- T.ryet ...lyle dei«lee in method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10% the...... ration in the method blank. An,lyte concentration in sample is not aRe,tes by blank contamination.
L3 - Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting Ilmite In associated samplas. Reaults n.f." by high blas.
B2 - Target analyte was detected in blank(,) al a concentration greater than 1/2 the nap—mo limit but less than the rportinq limit. Analyte concentration in sample is valid and may be used for compliance purposes.
M1 = Matrix spike recovery was highthe assocleed Laboratory Control Spike (LCS) was acceptable.
CL - The continuing calibration for this compound is outside d P... Analytkal ....planrc limits.
M2 = Matrix spike recovery was Low. the 11—iated Laboratory Control Spike (LCS) w s ac«ptable.
CR = The dissolvetl metal reault was greater than the total metal result for this alempt. Reaulta ware confirmed by reanalysis.
M3 = Matrix spike recovery was outside laborctery control limits due to matrix interhrences.
03 - Sample was diluted due to the presence of high levels oirton-target analytes or other matrix interference.
Me = The spike recovery v+lue was unusable since the analyte concentration in the sample was disproportionate to the spike level.
j- Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detadion Limit (MDL) and therefore concentration Is estimated.
N3 = This sample was inadvertently collected with sample running through the flow cell and should be considered Invalid based on possible contamination Rom the Row cell.
H] - Analyst, conducted outside the EPA method holding time.
N2 = The lab does not hold accredll.b.. for this parameter.
5 = Associated calibration check did not meet sp.clfl.d criteria.
P:\ Duke Ene,gy Progress. 1026 \ 02. ASHEVILLE PLANT\43.Ba— A Dcsign Report 6 Modeling\Design Rpt (60)\Tales\Table 2-2 Bemhmark Eeba.xlsx Page 4 016

TABLE 2-2
BENCHMARK DATA
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
7Lg38Fi
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
-Bold highlighted concentration indicates exceedance the 15A NCAC 026/EPA Human Health Criteria, 2016(NC), 2016(EPA).
0 -Bold highlighted concentration indicates exce d—, than the 15A NCAC 02B/EPA Ecological Criteri,, 2DI6(NC), 2016(EPA).
Temp =Temperature ORP = Oxidation -Reduction Potential S.U. = Standard Unit umhas/cm = Micro mhos per centimeter DIS = Or ... Wall
®®®m®®®®®®®®®®®®®
Spec Cord = SpacifC Conductance Eh = Redox Polenti,l R = Feet mV = Millivolts TOT= Total
ug/L = Microgram per liter
DO = Dissolved oxygen DUP = Duplicate Deg C = Degrees Call., M = Ne helamatric to rbidit unit tori
p Y pCi/I =pito es per liter
mq/L = Milligram per liter
= NC DHHS Health Screening Level.
< = Concentration not detected at or above the reporting limit
= Interim Maximum Allowable Concentrations (LMAC,) of the 15A NCAC OR Standard, Appandlx 1, April 1, 2013.
B = Target analyte detected in method blank at or above the rap. -g Ilmit.
Bl - Target analyte detected in method blank at or above the reporting limit. Target analyte Concentration in sample was greater than 101 the concentration In the method blank. Analyte concentration in sample is not aff-I
by 1,11"111"
lank Contamination.
B2 = Target analyte was detected in blank(,) at a concentration re
gre,ter than 1/2 the porting limit but less than the reporting limn. Analyte concentration in sample is valid and muse
may be d for comnce pliapurposes.
CL =The continuing calibration for this compound is outside of Pace Analytical accept—, limits.
CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis.
D3 - Sample was diluted due to the presence of high levels of non -target an.lytes or other matrix interference.
j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection limit (MDL) and therefore concentration is estimated.
111 = An,lysis conducted outside the EPA method holding time.
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7Lg38Fi
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
-Bold highlighted concentration indicates exceedance the 15A NCAC 026/EPA Human Health Criteria, 2016(NC), 2016(EPA).
0 -Bold highlighted concentration indicates exce d—, than the 15A NCAC 02B/EPA Ecological Criteri,, 2DI6(NC), 2016(EPA).
Temp =Temperature ORP = Oxidation -Reduction Potential S.U. = Standard Unit umhas/cm = Micro mhos per centimeter DIS = Or ... Wall
mg - N/L - Milligram nitrogen Der liter
Spec Cord = SpacifC Conductance Eh = Redox Polenti,l R = Feet mV = Millivolts TOT= Total
ug/L = Microgram per liter
DO = Dissolved oxygen DUP = Duplicate Deg C = Degrees Call., M = Ne helamatric to rbidit unit tori
p Y pCi/I =pito es per liter
mq/L = Milligram per liter
= NC DHHS Health Screening Level.
< = Concentration not detected at or above the reporting limit
= Interim Maximum Allowable Concentrations (LMAC,) of the 15A NCAC OR Standard, Appandlx 1, April 1, 2013.
B = Target analyte detected in method blank at or above the rap. -g Ilmit.
Bl - Target analyte detected in method blank at or above the reporting limit. Target analyte Concentration in sample was greater than 101 the concentration In the method blank. Analyte concentration in sample is not aff-I
by 1,11"111"
lank Contamination.
B2 = Target analyte was detected in blank(,) at a concentration re
gre,ter than 1/2 the porting limit but less than the reporting limn. Analyte concentration in sample is valid and muse
may be d for comnce pliapurposes.
CL =The continuing calibration for this compound is outside of Pace Analytical accept—, limits.
CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis.
D3 - Sample was diluted due to the presence of high levels of non -target an.lytes or other matrix interference.
j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection limit (MDL) and therefore concentration is estimated.
111 = An,lysis conducted outside the EPA method holding time.
NE = Not established
NA = Not analysed
NM = Not measured
L1 = Analyte recovery in the laboratory control ser mple (I -CS) was above QC limits. Results may be biased high.
L3 = Analyte recovery In the labor,tory control s, mple (I -CS) exceeded QC limits. Analyte presence below reporting limits m associated samples. Results unaffected by high blas.
M1 = Matrix spike recovery was hlgh: the ,... ci,ted Laboratory Control Spike (I -CS) was acceptable.
M2 = Matrix spike recovery was Low: th<assocl,ted Laboratory Contra( Spike (LCS) was acceptable.
M3 = Matrix spike recovery was outside laboratory control limits due to matrix interferences.
M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
NI =This sample was inadvertently coil—d with sample running through tha Row cell and should be considered invalid based on passible contamination from the flow all.
N2 = The lab does not hold ,lcrx, tat- for this parameter.
S = Associated calibration check did not meet specified criteria.
Prepared By: = Checked By =
PADuke Energy Pro9ress.1026\OZASI I VILLE 1`LM7\43.Basis of Design Report&Madding\D gn Rpt(60)\Tables\Table 2-2 Benchmark Data. xlsx Page 5 If

TABLE 2-2
BENCHMARK DATA
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Prepared By: sea Chalked By: BM
LclsEl
- Bold highlighted concentration indicates alood.1c, of the 15A NCAC 02L St,nd,N, Appendix 2, April 1, 2013.
-Bold highlighted <oncentrat'on nd'tates exceedance the 15A NCAC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA).
- Bold highlighted concentration indicates exceedance than the 15A NUC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA).
Temp = Temperature ORP =Oxidation-Redutbon Potential S.U. = Standard Unit .mhos/cm = Micro mhos per centimeter DIS = Dissolved mg - N/L = Milligram nitrogen per liter NE = Not established
Spec Cold = Specific Conductance Eh = Redox potential R = Feet - = Millivolts TOT= Total uq/L = Microgram pet liter NA = NO analysed
DO = Dissolved oxygen DUp = Duplicate Deg C = Degrees Celsius NIU = Nephelometric turbidity ..it pci/I = pill' , par Iger mg/L = Milligram per liter NM = Not measured
= NC DHHS Health Screening Level.
< = Concenttatlon not detected at or above the reporting limit
= Interim Maximum Allowable Concentrations (IMAC,) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
B = Target analyte detected in method blank at or above the reporting limit. Ll = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high.
B1 - Target analyte detected m method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10X the concentration in the method blank. Analyte concentration in sample is not a11 -ad by blank contamination, L3 = A.,lyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte present. below reporting limits in associated samples. Results unaffected by high bias.
32 = Target analyte was detected in blank(,) .t a concentration 9 ... ter than 1/2 the reporting limit but less th.n the reporting Ilmit. Analyte concentration in sample is valid and may be used for compliance purposes. M3 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
CL =The continuing calibration for this compound is outside of Pace Analytical acceptance limits. M2 = Matrix spike recovery w,s Low: the associated laboratory Control Spike (LCS) was ....pt.ble,
CR = The dissolved metal re -ft was greater than the total —1 result for this element. Results were c.nflrmed by reanalysis. M3 = Matrix spike recovery was outside laboratory control limits due tomatrix Interlerentes.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or .,her matrix iO.K. enc.. Me = The spike recovery v.lue was unusable since the analyte concentration in the sample was disproportionate to the spike level.
j = indicates concentration reported below Practical Q...Vital— Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. N1 = Th" mple was inadvertently 1101aed wIth sample running through the flow cell and should be considered invalid baud on possible contamination from the Flow cell.
HS = Analysis conducted outside the EPA method holding time. N2 = The lab does not hold accreditation for this p,ramelar.
S = Associated calibration check did not ,at specified criteria,
P:\ Duke Energy Progress.1026\02.ASHEVILLE PLANT\a3.Basis of R ign Report & Modeling\Deign Rpt (60)\Tanta\Table2-2 Benchmark Dala.xlex Page 6 of 6
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Prepared By: sea Chalked By: BM
LclsEl
- Bold highlighted concentration indicates alood.1c, of the 15A NCAC 02L St,nd,N, Appendix 2, April 1, 2013.
-Bold highlighted <oncentrat'on nd'tates exceedance the 15A NCAC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA).
- Bold highlighted concentration indicates exceedance than the 15A NUC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA).
Temp = Temperature ORP =Oxidation-Redutbon Potential S.U. = Standard Unit .mhos/cm = Micro mhos per centimeter DIS = Dissolved mg - N/L = Milligram nitrogen per liter NE = Not established
Spec Cold = Specific Conductance Eh = Redox potential R = Feet - = Millivolts TOT= Total uq/L = Microgram pet liter NA = NO analysed
DO = Dissolved oxygen DUp = Duplicate Deg C = Degrees Celsius NIU = Nephelometric turbidity ..it pci/I = pill' , par Iger mg/L = Milligram per liter NM = Not measured
= NC DHHS Health Screening Level.
< = Concenttatlon not detected at or above the reporting limit
= Interim Maximum Allowable Concentrations (IMAC,) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
B = Target analyte detected in method blank at or above the reporting limit. Ll = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high.
B1 - Target analyte detected m method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10X the concentration in the method blank. Analyte concentration in sample is not a11 -ad by blank contamination, L3 = A.,lyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte present. below reporting limits in associated samples. Results unaffected by high bias.
32 = Target analyte was detected in blank(,) .t a concentration 9 ... ter than 1/2 the reporting limit but less th.n the reporting Ilmit. Analyte concentration in sample is valid and may be used for compliance purposes. M3 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
CL =The continuing calibration for this compound is outside of Pace Analytical acceptance limits. M2 = Matrix spike recovery w,s Low: the associated laboratory Control Spike (LCS) was ....pt.ble,
CR = The dissolved metal re -ft was greater than the total —1 result for this element. Results were c.nflrmed by reanalysis. M3 = Matrix spike recovery was outside laboratory control limits due tomatrix Interlerentes.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or .,her matrix iO.K. enc.. Me = The spike recovery v.lue was unusable since the analyte concentration in the sample was disproportionate to the spike level.
j = indicates concentration reported below Practical Q...Vital— Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. N1 = Th" mple was inadvertently 1101aed wIth sample running through the flow cell and should be considered invalid baud on possible contamination from the Flow cell.
HS = Analysis conducted outside the EPA method holding time. N2 = The lab does not hold accreditation for this p,ramelar.
S = Associated calibration check did not ,at specified criteria,
P:\ Duke Energy Progress.1026\02.ASHEVILLE PLANT\a3.Basis of R ign Report & Modeling\Deign Rpt (60)\Tanta\Table2-2 Benchmark Dala.xlex Page 6 of 6