ASHE BG GW FINAL Dec 2016

TECHNICAL MEMORANDUM
Date: December 15, 2016 File: 1026.102.19
To: John Toepfer (Duke Energy)
Cc: Kathy Webb (S erra)
From: Todd Plating
Subject: Quantificatio of Va d Background Groundwater Samples for Statistics
Calculations and Recommendation of Additional Background Wells - GW -1
Cluster for the Asheville Steam Electric Plant
Proposed Preliminary Background Threshold Values (PPBTVs) for groundwater will be
calculated for CAMA assessment constituents identified with concentrations greater than the 2L
or IMAC at the Asheville Steam Electric Plant (Site). A summary of background well analytical
results was originally presented in the Asheville Corrective Action Plan Part 1 submitted on
November 20, 2015 and updated in the CSA Supplement 1 submitted August 2016. Table 1
provides a summary of existing background well data for each flow system and indicates which
samples are considered for use in statistical calculations to determine concentrations of
naturally occurring (background) inorganic constituents in groundwater. Well locations are
presented on Figure 1. Additional sampling has been conducted since September 2016 that can
be used to augment the dataset provided herein once avaialable. The following discussion
quantifies the number of valid results to date within each flow zone and provides justification
for including monitoring wells GW -1, GW -1D, and GW-1BR within the evaluation of PPBTVs at
the Site.
BACKGROUND WELL DATA ANALYSIS
The current background monitoring well network consists of wells installed within four flow
zones (alluvial, saprolite, transition zone, and bedrock). Samples from these wells must meet
the following criteria to be considered valid for determining PPBTVs:
tr Sample pH is less than or equal to (<) 8.5 standard units (S.U.);
Sample turbidity is less than or equal to (<) 10.0 Nephelometric Turbidity Units (NTUs);
and
y Result is not a statistical outlier identified for background sample data collected through
April 2016 (SynTerra, August 31,2016; CSA Supplement 1).
Professional judgement can be used to retain data that does not meet these criteria (such as pH);
however, the decision to retain data that does not satisfy these criteria must be documented.
For Asheville, only an evaluation with pH <8.5 was conducted due to the limited occurrence of
groundwater with pH between 8.5 and 9.0 S.U. Only one sample was identified with pH of 8.9
and this sample was eliminated.
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Review—DEQ Request\Final BG Analytical thru 2019-09 plus GW-1.docx

Quantification of Valid Background Groundwater Samples for Statistics Calculations and
Recommendation of Additional Background Wells - GW -1 Cluster December 15, 2016
Asheville Steam Electric Plant Page 2 of 3
ALLUVIAL
One background well (MW -10) is screened within the alluvial flow zone. Nine valid sampling
events have occurred since March 2014. One sample (November 4, 2014) has been eliminated as
water quality parameters were not reported by a third party who collected this sample. With
the exception of a hexavalent chromium, strontium, total radium, and uranium, the alluvial
background data set will satisfy the requirements for the minimum number of samples to
conduct statistical analysis by the end of 2016.
SAPROLITE
Five background wells (AMW-3A, CB -1, CB -9, CB-09SL, and MW -24S) are screened in the
saprolite flow zone. The data set will satisfy the requirements for the minimum number of
samples to conduct statistical analysis for all constituents.
Groundwater samples eliminated from background dataset include:
47 AMW-3A appears to be contaminated by grout as pH remains elevated after
attempts to redevelop the well.
47 Four samples from CB -1 and one sample from CB-09SL were eliminated due to
elevated turbidity.
17 Boron, manganese, strontium, and sulfate results from the MW -24S sample collected
on April 12, 2016 have been flagged as outliers during preliminary statistical
analysis. Review of laboratory analytical data packages, including duplicate
analyses, have resulted in the elimination of this sample from the data set.
TRANSITION ZONE
One background well (CB -01D) is screened within the transition zone. Eight valid sample
events have occurred since April 2015. With the exception of hexavalent chromium, total
radium, and uranium, the transition zone background data set will satisfy the requirements for
the minimum number of samples to conduct statistical analysis by the end of 2016. It is
projected that the minimum number of background data necessary to run statistics would be
achieved in July 2017 for all paramenters based upon a two month sampling frequency.
BEDROCK
Two wells (AMW-3B and CB-09BR) are screened in the bedrock flow zone. With the exception
of nitrate, the bedrock background data set will satisfy the requirements for the minimum
number of samples to conduct statistical analysis by the end of 2016.
Groundwater samples eliminated from background dataset include:
47 Elevated turbidity in one sample at AMW-3B and two samples at CB-09BR.
07 Elevated pH, observed during the initial sampling event, at CB-09BR.
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Review -DEQ Request\Final BG Analytical thru 2019-09 plus GW-l.docx

Quantification of Valid Background Groundwater Samples for Statistics Calculations and
Recommendation of Additional Background Wells - GW -1 Cluster December 15, 2016
Asheville Steam Electric Plant Page 3 of 3
47 Water quality parameters were not reported for a sample collected by a third party
on November 4, 2014 at AMW-3B.
RECOMMENDATION OF ADDITIONAL BACKGROUND WELLS — GW -1
CLUSTER
While evaluating the background data set, the sample results from wells within the GW -1
cluster were found to exhibit background water quality characteristics and are recommended
for inclusion within the determination of PPBTVs. Figure 1-80 (attached) from the CSA
Supplement 1 indicates the water table elevation at well GW -1 has not been influenced by
dewatering the 1982 basin. Groundwater head elevations at this location appear connected to
Lake Julian as evident by the relatively stable water table and similar head elevation to the lake,
approximately 2,160.70 feet. Recent water level measurements indicate similar head potential at
GW -1 and GW -1D (2,159.98 feet and 2,060.06 feet, respectively) and a downward vertical
gradient to GW-1BR (2,154.96).
Wells PZ -26, MW -1D, and MW-1BR are located southwest of the GW -1 cluster at the edge of the
CCR surface impoundment boundary. September 2016 groundwater head elevations at this
location are approximately 20 feet lower than those at the GW -1 cluster in the surficial zone (PZ -
26 2,140.48 feet) and transition zone (MW -1D 2,140.20 feet), and 14 feet lower within the
bedrock flow system (MW-1BR 2,140.47 feet). This data further indicates GW -1 is upgradient of
the 1982 basin and acceptable to include within the background evaluation.
Historical analytical data results (Table 1) of select coal ash indicator parameters for wells
within the GW -1 cluster indicate values of boron, strontium, sulfate, and TDS are consistent
with other background location results and similar to previously developed provisional
proposed background concentrations. The inclusion of the GW -1 cluster in the statistical
background evaluation would bolster the current dataset for saprolite from 46 to 65, transition
zone from 8 to 13, and bedrock from 12 to 14 valid samples. Sample results that do not meet
criteria described above have been flagged and eliminated from the valid count on Table 1.
ATTACHMENTS:
Table 1: Background Analytical Results through September 2016 Including GW -1
Figure 1: Site Layout Map
Figure 1-80: Water Table Elevations Time Series Plot
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Review -DEQ Request\Final BG Analytical thru 2019-09 plus GW-1.docx

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2016-09 PLUS GW -1 CLUSTER
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Statistics\Stats Review_DEQ Request\FINAL BG Analytical thru 2019-09 plus GW -1 Page 1 of 3
Analytical Parameter
PN
Water
Level
Temp
Spec
Coed
DO
ORP
Eh
Turbidity
Antimony
Arsenic
Beryllium Boron
Cadmium
Chloride
Chromium
iVli Chromium Cobalt
Iron
Manganese
Nickel
Nitrate
Nit N)
Nitrate
Selenium
Sodium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Radium -226
Radium -228 Uranium
-233 Uranium
-234 Uranium
-236 Uranium -238
Reporting Units
S.U.
ft
Deg C
u mhos
mg/L
mV
mV
NTUs
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
pCi/L
pCi/L
ug/mL
ug/mL
ug/mL
ug/mL
15A NCAC 02L Standard
6.5-8.5
NE
NE
HE
NE
NE
NE
NE
1*
10
4*
700
2
250
0.07^
10
1*
300
50
100
10
SO
20
NE
NE
250
0.2*
500
0.3*
NE
NE
NE
NE
NE
HE
Sample ID
Sample
Collection Date
Field Parameters
Analytical Results
Alluvial
MW -10
03/05/2014
5.4
5.72
10
72
5.94
226
NM
2.9
NA
<1
NA
150
<1
4.4
NA
<5
3.18
207
187
<5
NA
NA
<1
NA
NA
0.63
<0.2
55
NA
NA
NA
NA
NA
NA
NA
MW -10
04/17/2014
5.0
5.64
12
68
0.3
182
NM
2.9
<1
<1
NA
<50
<1
8.3
NA
<5
NA
1040
573
<5
0.04
0.16
<1
NA
NA
0.41
<0.2
48
NA
NA
NA
NA
NA
NA
NA
MW -10
07/23/2014
4.6
5.70
19
67
0.38
244
NM
0.93
<1
<1
NA
<50
<1
8.4
NA
<5
<5
598
363
15
0.1
0.42
<1
3.3
NA
0.58
<0.2
44
NA
NA
NA
NA
NA
NA
NA
MW -10
11/04/2014
NM
NM
NM
NM
NM
NM
NM
NM
<I
<1
<1
NA
<1
NA
NA
<I
6.11
675
555
2.95
NA
NA
<1
3.27
NA
NA
<0.2
NA
NA
NA
NA
NA
NA
NA
NA
MW -10
05/12/2015
5.0
5.58
16
64
0.96
47
252
4.09
<1
<1
<1
<50
<1
8.9
NA
<1
4.29
369
340
3.1
NA
NA
<1
4.02
24
0.3
<0.2
44
<0.3
NA
NA
NA
NA
NA
NA
MW -10
12/08/2015
5.4
5.79
14
74
0.4
27
232
0.69
<0.5
<0.5
0.22
<50
<0.08
12.6
0.14
'0.5
3.6
64
200
2.9
NA
NA
<0.5
5.09
24
<1
0.13
91
<1
NA
NA
NA
NA
NA
NA
MW -10
01/19/2016
5.1
5.62
8
72
0.53
481
686
0.71
<1
<1
<1
<50
<1
14
0.17 MI
<1
2.99
63
185
2.78
NA
NA
<1
4.85
25
0.29
<0.2
40
<0.3
NA
NA
NA
NA
NA
NA
MW -10
04/12/2016
5.1
5.69
13
67
0.37
141
346
1.82
<1
<1
<1
150
<1
12
0.12
<1
2.12
54 B2
142
2.44
NA
NA
<1
4.15
24
0.43
10.2
46
10.3
1.17
<3
10.00005
10.00005
10.00005
10.0002
MW -10
07/08/2016
4.6
5.74
23
70
1.73 S
359
564
6.97
<1
11
11
150
<1
15
0.14
<1
2.95
31
175
1.86
NA
NA
<1
5.64
26
0.3
10.2
53
10.3
0.787
<1
10.00005
10.00005
10.00005
<0.0002
MW -10
09/13/2016
5.1
6.79
21
75
0.29
203
408
1.41
<1
11
<1
<50
<1
15
0.1
<1
4.19
220
243
2.67
NA
NA
<1
5.92
23
0.45
<0.2
49
10.3
4.71
<1
10.00005
<0.00005
10.00005
<0.0002
Total Count of Valid Samples
9
9
8
9
6
9
9
9
5
9
8
9
9
9
2
2
9
7
6
9
9
9
5
3
3
3
3
3
3
Saprolite
AMW-3A
11/04/2014
NM
NM
NM
NM
NM
NM
NM
NM
<I
<1
<I
NA
<I
NA
NA
12.4
<1
153
22
<1
NA
NA
<1
6.54
NA
NA
10.2
NA
NA
NA
NA
NA
NA
NA
NA
AMW-3A
05/12/2015
12.1
8.17
15
2350
5.41
-189
16
15
<I
<1
<3
<50
<1
1.1
NA
<1
<1
110
<5
<3
NA
NA
<I
7J
1220
0.34
<0.2
500
8.98
NA
NA
NA
NA
NA
NA
CB -1
11/17/2010
4.6
47.73
14
15
NM
NM
NM
9.16
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
1160
46.3
<5
NA
0.51
<10
NA
NA
<5
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
04/12/2011
4.4
48.20
17
18
7.57
126
331
4.81
10.5
<5
NA
<50
<0.08
<5
NA
<5
NA
589
36.3
<5
NA
0.43
<10
NA
NA
<5
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
07/19/2011
4.8
48.40
22
17
7.16
-4
201
17.6
<0.5
<5
NA
51.1
<0.08
<5
NA
81.5
NA
1330
43
53 b
NA
0.43
<10
NA
NA
<5
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
11/09/2011
5.4
50.47
12
19
8.36
-86
119
20.9
<0.5
6.7
NA
150
<0.08
<5
NA
8.7
NA
17800
293
12
NA
0.42
<10
NA
NA
<5
<0.1
93
NA
NA
NA
NA
NA
NA
NA
CB -1
04/10/2012
4.8
49.75
15
16
9.67
-44
161
8.11
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
276
28.4
<5
NA
0.41
<10
NA
NA
<5
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
07/16/2012
4.6
49.09
16
20
8.65
317
522
3.65
10.5
<5
NA
<50
<0.08
1.6
NA
<5
NA
179
26.8
<5
NA
0.42
<10
NA
NA
<2
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
11/15/2012
4.9
50.89
16
18
7.82
335
540
7.86
<0.5
<5
NA
<50
<0.08
1.4
NA
<5
NA
218
28.5
<5
NA
0.36
<10
NA
NA
<2
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
04/03/2013
4.5
49.47
15
20
7.89
135
340
4.78
<1
<1
NA
<50
<1
1.5
NA
15
NA
98
27
10
NA
0.43
<1
NA
NA
<0.1
<0.2
<10
NA
NA
NA
NA
NA
NA
NA
CB -1
07/01/2013
5.3
44.71
16
24
8.75
60
265
9.2
<1
<1
NA
<50
<1
1.7
NA
<5
NA
2870
67
<5
NA
0.42
1.22
NA
NA
<0.1
<0.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
11/05/2013
4.5
43.93
15
18
9.4
413
618
12
<1
<1
NA
<50
<1
1.6
NA
<5
NA
664
33
<5
NA
0.42
<1
NA
NA
0.15
<0.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
04/16/2014
4.4
46.05
15
17
8.3
410
615
2.8
<1
<1
NA
<50
<1
1.7
NA
<5
NA
152
24
<5
NA
0.42
<1
NA
NA
0.18
<0.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
07/09/2014
4.6
46.41
16
18
8.67
387
592
3.6
<1
<1
NA
<50
<1
1.7
NA
<5
NA
215
26
<5
NA
0.45
<1
NA
NA
0.12
10.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
11/03/2014
4.5
48.24
16
22
7.53
352
557
7.09
<1
<1
NA
<50
<1
1.7
NA
<5
NA
175
25
<5
NA
0.4
<1
NA
NA
0.17
<0.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -1
04/07/2015
4.9
45.50
15
17
8.68
136
341
6.74
<1
<1
<1
<50
<1
1.6
NA
<5
1.94
279
26
'S
NA
0.42
<1
1.04
NA
0.36
<0.2
31
NA
NA
NA
NA
NA
NA
NA
CB -1
07/06/2015
4.7
49.12
16
20
8.34
161
366
3.82
<1
<1
<1
<50
<1
1.7
NA
<5
1.95
86
25
<5
0.4
1.8
<1
0.993
<5
0.61
<0.2
<25
<0.3
NA
NA
NA
NA
NA
NA
CB -1
11/03/2015
5.1
50.73
16
15
7.9
525
730
21
<I
<1
<3
150
<1
1.2
NA
5
4.11
4040
91
<5
0.29
1.3
<1
0.893 B2
<5
0.4
<0.2
<25
3.03
NA
NA
NA
NA
NA
NA
CB -1
12/08/2015
5.1
50.76
15
15
6.4
69
274
8.8
<0.5
<0.5
<0.2
<50
<0.08
1.6
0.031
0.78
1.9
290
27
1.4
NA
NA
<0.5
<5
<5
<1
<0.1
33
<1
NA
NA
NA
NA
NA
NA
CB -1
01/20/2016
4.9
48.27
10
16
8.32
220
425
7.81
<1
<1
<1
<50
<1
2.2
10.03
<1
2.1
279
28
1.53
NA
NA
<1
1.03
<5
<0.1
<0.2
125
<0.3
NA
NA
NA
NA
NA
NA
CB -1
04/07/2016
4.9
44.14
14
17
8.22
329
534
9.74
<1
<1
<1
<50
<1
2
<0.03
<5
2.36
532
31
<5
0.4
1.8
<1
1.17
<5
0.35
10.2
<25
<0.3
14.4
<3
<0.00005
<0.00005
<0.00005
<0.0002
CB -1
07/05/2016
4.8
47.44
23
17
5.44
360
565
8.95
<1
<1
<1
<50
<1
1.9
<0.03
<5
2.39
595
32
<5
0.4
1.8
<3
1.05
<5
0.23
<0.2
<25
0.537
6.55
<1
10.00005
<0.00005
'0.00005
0.000252
CB -1
09/16/2016
4.5
49.44
16
17
7.41
306
511
6.75
<1
<1
<1
<50
<1
1.7
<0.03
<1
2.26
325 B2
26
1.59
NA
NA
<1
0.969
<5
<0.1
<0.2
<25
0.304
24.9
<1
<0.00005
<0.00005
<0.00005
<0.0002
CB -9
11/15/2012
5.0
37.78
15
46
1.66
399
604
8.42
10.5
<5
NA
<50
10.08
6.8
NA
<5
NA
2880
105
<5
NA
0.38
<10
NA
NA
<2
0.12
<25
NA
NA
NA
NA
NA
NA
NA
CB -9
04/03/2013
4.9
37.18
15
40
7.8
112
317
2.01
<1
<1
NA
<50
<1
6.5
NA
<5
NA
370
67
<5
NA
0.33
<1
NA
NA
0.2
<0.2
42
NA
NA
NA
NA
NA
NA
NA
CB -9
07/01/2013
5.3
34.74
16
48
1.9
38
243
8.43
<1
<1
NA
<50
<1
6.4
NA
6
NA
2080
92
6
NA
0.33
1.12
NA
NA
0.11
<0.2
26
NA
NA
NA
NA
NA
NA
NA
CB -9
11/05/2013
4.7
35.72
15
38
2.8
378
583
8.7
<1
<1
NA
<50
<1
6.8
NA
<5
NA
883
60
<5
NA
0.34
<i
NA
NA
0.21
<0.2
28
NA
NA
NA
NA
NA
NA
NA
CB -9
04/16/2014
4.8
36.13
15
38
2.2
347
552
3.5
<1
<1
NA
<50
<1
6.9
NA
<5
NA
248
39
<5
NA
0.33
<1
NA
NA
0.13
<0.2
<25
NA
NA
NA
NA
NA
NA
NA
CB -9
07/09/2014
4.8
35.89
16
38
2.59
353
558
5.3
<1
<1
NA
<50
<1
6.8
NA
<5
NA
531
47
<5
NA
0.35
<1
NA
NA
0.12
<0.2
28
NA
NA
NA
NA
NA
NA
NA
CB -9
11/03/2014
4.9
37.18
15
47
2.01
228
433
8.34
<1
<1
NA
<50
<1
6.9
NA
<5
NA
341
41
<5
NA
0.29
'1
NA
NA
0.14
10.2
26
NA
NA
NA
NA
NA
NA
NA
CB -9
04/07/2015
5.0
37.29
16
38
2.24
114
319
8.79
<1
<1
<1
<50
<1
6.7
NA
<5
1.36
653
50
<5
NA
0.29
<1
4.1
NA
0.24
<0.2
35
NA
NA
NA
NA
NA
NA
NA
CB -9
07/06/2015
4.9
37.02
16
41
2.25
159
364
4.5
<1
<1
<1
<50
<1
6.7
NA
<5
<1
158
40
'5
0.28
1.2
<S
4.06
8
0.11
<0.2
25
10.3
NA
NA
NA
NA
NA
NA
CB -9
09/09/2015
5.0
37.50
16
37
1.97
223
428
7.51
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CB -9
11/02/2015
4.5
36.57
16
37
2.7
575
780
9
<1
'1
<1
150
<1
6.6
NA
<5
1.64
1050
65
<5
0.25
1.1
<1
4.07
8
0.36
<0.2
<25
1.33
NA
NA
NA
NA
NA
NA
CB -9
12/08/2015
5.3
37.09
15
36
1.72
204
409
3.38
<0.5
<0.5 -1
<0.2
<50
<0.08
6.7
0.1
<0.5
0.8
150
34
1.2
NA
NA
<0.5
<5
7
<1
<0.1
43
<1
NA
NA
NA
NA
NA
NA
CB -9
01/21/2016
5.2
35.48
15
36
1.8
284
489
1.8
<1
<1
<1
<50
<1
6.9
0.12
<1
<1
84
36
1.28
NA
NA
<1
3.89
7
0.14
<0.2
125
10.3
NA
NA
NA
NA
NA
NA
CB -9
04/06/2016
5.1
34.71
15
37
2.21
336
541
9.33
<1
<1
<1
<50
<1
6.9
0.089
<5
1.45
739
52
<5
0.26
1.2
<1
4
7
0.25
<0.2
<25
0.763
1.8
2.18
<0.00005
<0.00005
<0.00005
0.00124
CB -9
07/05/2016
5.0
36.47
17
36
2.38
348
553
9.75
<1
<1
<1
<50
<1
7.1
0.085
<5
1.14
294
40
<5
0.26
1.2
<1
3.94
7
0.11
<0.2
<25
0.501
1.49
<1
10.00005
'0.00005
'0.00005
<0.0002
CB -9
09/14/2016
5.1
37.49
16
37
2.21
283
488
7.88
<1
<1
<1
<50
<1
6.4
0.11
<1
1.14
237
38
1.48
NA
NA
<1
3.91
7
0.14
<0.2
29
0.67
2.64
<1
<0.00005
<0.00005
<0.00005
<0.0002
CB -095L
04/27/2015
6.0
36.05
13
76
1.08
130
335
30.4
<I
<1
<1
<50
<1
6.1
NA
2.86
1.21
475
125
2.13
NA
NA
<1
8.54
40
0.74
<0.2
92
0.56
NA
NA
NA
NA
NA
NA
CB-09SL
05/28/2015
5.8
35.98
19
59
1.59
84
289
5.97
<1
<1
<1
<50
<1
6.6
NA
<1
<1
73
71
<1
NA
NA
<1
4.15
28
0.57
<0.2
43
<0.3
NA
NA
NA
NA
NA
NA
CB-09SL
09/08/2015
5.8
36.51
16
59
2.61
165
370
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CB-09SL
12/08/2015
6.0
35.99
14
56
2.11
198
403
6.44
<0.5
<0.5 L3
0.29
<50
<0.08
6.2
0.2
1.3
<0.5
320
12
0.77
NA
NA
<0.5
<5
28
<1
<0.1
93
<1
NA
NA
NA
NA
NA
NA
CB-09SL
01/21/2016
5.8
34.50
9
54
2
225
430
7.1
<1
<1
<1
<50
<1
6.5
0.2
<1
<1
95
15
<1
NA
NA
<1
3
30
0.24
<0.2
41
<0.3
NA
NA
NA
NA
NA
NA
CB-09SL
04/13/2016
5.6
34.05
15
56
1.63
97
302
1.05
<1
<1
<1
<50
<1
6.3
0.25
<1
<1
23
6
<1
NA
NA
<1
3.25
24
0.25
<0.2
54
10.3
1.26
<3
<0.00005
<0.00005
<0.00005
<0.0002
CB-09SL
07/11/2016
5.7
35.64
17
55
1.5
129
334
9.3
<1
<1
<1
<50
<1
6.3
0.23
19.3
<1
158
13
12.4
NA
NA
<1
3.27
27
0.72
10.2
43
0.392
1.3
<1
10.00005
<0.00005
10.00005
0.0000788 j
CB-09SL
09/14/2016
5.8
36.46
17
61
1.47
61
266
9.67
<1
<1
<1
<50
<1
6.6
0.18 MI
1.43
<1
78
7
11
NA
NA
<1
3.21
28
0.26
<0.2
47
0.479
1.07
11
<0.00005
<0.00005
<0.00005
0.000145 j
MW -24S
05/11/2015
5.0
11.26
17
75
5.48
72
277
1.77
<1
I <1
<1
<50
<1
12
NA
<1
2.05
304
170
1.16
1 NA
NA
<S
1 3.48
37
0.49
<0.2
54
10.3
NA
NA
NA
NA
NA
NA
MW -24S
06/01/2015
5.2
11.19
15
79
4.67
97
302
2.74
<1
<1
<1
<50
<1
13
NA
<1
1.02
60
136
1.07
NA
NA
<1
3.25
36
0.62
<0.2
66
<0.3
5.78
<3
<0.00005
10.00005
<0.00005
10.0002
MW -24S
09/02/2015
5.2
11.34
18
78
5.03
193
398
0.96
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW -24S
12/08/2015
5.2
10.95
14
77
4.81
154
359
0.25
<0.5
<0.5 L3
0.23
<50
<0.08
13
0.3 M1
<0.5
0.78
<50
120
0.75
NA
NA
<0.5
<5
35
<1
<0.1
72
<1
NA
NA
NA
NA
NA
NA
MW -24S
01/19/2016
5.3
10.98
12
79
5.12
148
353
0.8
<1
<1
<1
<50
<1
14
0.31
<1
1.06
<10
150
1.02
NA
NA
<1
3.31
37
0.66
<0.2
36
<0.3
NA
NA
NA
NA
NA
NA
MW -24S
04/12/2016
5.2
11.30
14
81
4.66
205
410
0.75
<I
<1
11
232
<1
14
0.26
<1
<1
235 B2
359
1.04
NA
NA
<I
3.38
228
0.74
<0.2
63
<0.3
1.76
<3
<0.00005
<0.00005
<0.00005
0.000168 j
MW -245
07/08/2016
4.3
10.81
17
80
6.21 S
325
530
1.22
<1
<l
<1
150
<1
14
0.26
<1
11
110
136
<1
NA
NA
<1
3.35
40
0.62
10.2
52
10.3
1.09
<1
10.00005
10.00005
10.00005
<0.0002
MW -24S
09/13/2016
5.3
11.76
16
81
4.9
240
445
0.85
<1
<1
<1
150
<1
14
0.27
<1
<1
<10
123
<1
NA
NA
<1
3.36
38
0.47
10.2
35
10.3
2.48
0.65
<0.00005
<0.00005
<0.00005
<0.0002
Total Count of Valid Samples
46
46
44
44
27
44
44
94
19
44
27
44
94
44
7
26
44
27
25
44
44
44
24
12
12
12
12
12
12
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Statistics\Stats Review_DEQ Request\FINAL BG Analytical thru 2019-09 plus GW -1 Page 1 of 3

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2016-09 PLUS GW -1 CLUSTER
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Statistics\Stats Review_DEQ Request\FINAL BG Analytical thru 2019-09 plus GW -1 Page 2 of 3
Analytical Parameter
PN
Water
Level
Temp
DO
ORPLTurbidity
Antimony
Arsenic
Beryllium Boron
Cadmium
Chloride
Chromium
iVii Chromium Cobalt
Iron
Manganese
Nickel
Nitrate
it N)
Nitrate
Selenium
Sodium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Radium -226
Radium -228 Uranium
-233 Uranium
-234 Uranium
-236 Uranium -238
Reporting Units
S.U.
ft
Deg C
Lumhos
mg/L
mV
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
pCi/L
pCi/L
ug/mL
ug/mL
ug/mL
ug/mL15A
NCAC 02L Standard
6.5-8.5
NE
NE
NEI
1*
10
4*
700
2
250
0.07A
10
1*
300
50
100
10
SO
20
NE
NE
250
0.2*
500
0.3*
NE
NE
NE
NE
NE
HE
Sample ID
Sample Collection Date
Field Parameters
Analytical Results
Transition Zone
CB -ID
04/28/2015
6.7
38.22
17
75
1.56
1
206
7.52
<1
<1
<1
<50
<1
1.3
NA
7.04
2.54
528
226
6.03
NA
NA
<1
5.63
25
2.7
<0.2
44
0.416
NA
NA
NA
NA
NA
NA
CB -1D
05/21/2015
6.4
38.36
16
57
0.8
48
253
2.83
<1
<1
<1
<50
<1
1.1
NA
1.27
1.66
589
286
2.07
NA
NA
<1
3.89
19
2.2
<0.2
37
0.34
NA
NA
NA
NA
NA
NA
CB -1D
09/08/2015
5.8
38.92
16
30
2.87
122
327
2.36
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CB -1D
12/06/2015
6.4
39.34
15
39
1.5
-67
138
3.26
<0.5
<0.5
<0.2
<50
<0.08
1.2
'0.03
2.4
2.6
610
180
3.7
NA
NA
<0.5
<5
19
3.2
<0.1
67
<1
NA
NA
NA
NA
NA
NA
CB -ID
01/20/2016
5.8
37.24
13
31
2.12
115
320
3.67
<1
<1
<1
<50
<1
0.83
'0.03
1.83
2.34
269
151
2.72
NA
NA
<1
1.78
14
3.2
<0.2
<25
<0.3
NA
NA
NA
NA
NA
NA
CB -1D
04/13/2016
5.6
34.08
15
36
3.17
91
296
4.08
<1
<1
<1
<50
<1
0.91
<0.03
<1
3.08
231
93
4.97
NA
NA
<1
2.92
17
4.6
<0.2
38
<0.3
2.9
<3
<0.00005
'0.00005
<0.00005
0.0000762 j
CB -1D
07/08/2016
5.1
36.70
20
30
6.53 S
213
418
9.65
<1
<1
<1
<50
<1
0.96
<0.03
<1
2.33
193
70
2.32
NA
NA
<1
2.48
14
2.1
<0.2
<25
<0.3
1.3
<1
<0.00005
<0.00005
<0.00005
0.000241
CB -1D
09/14/2016
5.6
38.27
17
30
5.41
222
427
9.75
<1
<1
<1
<50
<1
0.96
<0.03
1.32
2.86
79
47
4.36
NA
NA
<1
2.16
13
2.5
<0.2
25
0.41
2.49
<1
<0.00005
<0.00005
<0.00005
0.000252
Total Count
of Valid Samples
8
8
7
7
7
7
7
7
5
1
1
7
7
7
O
O
7
7
7
7
7
7
7
3
3
3
3
3
3
Bedrock
AMW-3B
07/23/2014
6.5
7.97
18
88
2.89
163
NM
10.8
<1
<1
NA
<50
<1
0.58
NA
<5
<5
131
17
<5
0.08
0.37
<1
7.16
NA
1.7
<0.2
92
NA
NA
NA
NA
NA
NA
NA
AM 3B
11/04/2014
NM
NM
NM
NM
NM
NM
NM
NM
<1
<I
<1
NA
<I
NA
NA
<I
<1
256
102
1.67
NA
NA
<1
8.21
NA
NA
<0.2
NA
NA
NA
NA
NA
NA
NA
NA
AMW-3B
05/12/2015
7.7
8.27
16
83
0.84
-69
136
6.86
<1
<1
<1
<50
<1
<2.5
NA
<1
<1
47
<5
1.77
NA
NA
<1
6.07
60
3.3
<0.2
72
0.344
NA
NA
NA
NA
NA
NA
AMW-3B
12/08/2015
6.1
8.24
14
73
4.3
40
245
8.56
<0.5
<0.5
<0.2
<50
'13.08
<1
0.21
<0.5
<0.5
<50
<5
1.2
NA
NA
<0.5
5.55
59
1.6
<0.1
95
<1
NA
NA
NA
NA
NA
NA
AMW-3B
01/20/2016
6.5
8.09
10
71
4.42
62
267
3.26
<1
<1
<1
<50
<1
0.61
0.18
<1
<1
20
<5
<3
NA
NA
<1
5.05
58
1.3
<0.2
47
<0.3
NA
NA
NA
NA
NA
NA
AMW-3B
04/12/2016
6.4
8.05
14
71
4.6
69
274
1.78
<1
<1
<1
<50
<1
0.6
0.18
<1
<1
<10 B2
<5
<1
NA
NA
<1
5.18
56
1.1
<0.2
67
<0.3
7.41
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-3B
07/08/2016
5.7
8.04
18
70
5.9S
312
517
6.6
<1
<1
<1
<50
<1
0.65
0.22
<1
<1
13
<5
<1
NA
NA
<1
5.12
57
1.1
<0.2
67
0.385
1.53
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-3B
09/13/2016
6.5
9.12
18
71
4.56
172
377
3.37
<1
<1
<1
<50
<1
0.55
0.19
<1
<1
<10
<5
<1
NA
NA
<1
5.12
56
1.2
<0.2
65
0.434
0.718
<1
<0.00005
<0.00005
<0.00005
'0.0002
CB -09 BR
04/27/2015
8.9
44.46
16
185
0.49
123
328
16.2
<I
<1
<I
<50
<I
6.4
NA
8.25
<1
460
21
4.42
NA
NA
1.56
8.39
115
3.9
<0.2
130
3.03
NA
NA
NA
NA
NA
NA
CB -096R
05/28/2015
6.5
48.57
16
135
0.36
69
274
10.8
<1
<1
<1
'50
<1
6.4
NA
<1
<1
402
76
1.36
NA
NA
<1
4.76
98
1.8
<0.2
96
0.499
NA
NA
NA
NA
NA
NA
CB -0 BR
09/08/2015
6.3
49.19
17
105
0.84
133
338
9.89
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CB-09BR
12/08/2015
6.6
47.95
14
100
0.55
65
270
7.06
<0.5
<0.5 L3
<0.2
<50
<0.08
6.1
0.092
1.1
<0.5
460
46
1.1
NA
NA
<0.5
<5
68
1.4
<0.1
83
<1
NA
NA
NA
NA
NA
NA
CB-09BR
01/21/2016
6.4
47.30
10
99
0.7
63
268
8.3
<1
<1
<1
<50
<1
6.4
0.068
9.08
<1
678
70
5.79
NA
NA
<1
3.47
71
1.2
<0.2
76
<0.3
NA
NA
NA
NA
NA
NA
CB-09BR
04/13/2016
6.1
46.93
15
98
0.52
57
262
8.71
<1
<1
<1
<50
<1
6.1
0.083
1.3
<1
557
57
1.42
NA
NA
<1
3.48
65
1.5
<0.2
82
<0.3
3.46
1.46
<0.00005
<0.00005
<0.00005
0.000114 j
CB-09BR
07/12/2016
6.1
47.58
19
91
0.65
259
464
9.1
<1
<1
<1
<50
<1
6.4
0.14
1.5
<1
236
43
1.69
NA
NA
<1
4.27
65
1.3
<0.2
67
0.318
2.6
<1
<0.00005
<0.00005
<0.00005
<0.0002
CB-09BR
09/14/2016
6.2
48.19
16
91
0.52
121
326
9.61
<1
<1
<1
<50
<1
5.8
0.1
2.21
<1
252
39
1.66
NA
NA
<1
3.31
60
1.6
<0.2
75
0.602
2.28
0.609
<0.00005
'0.00005
<0.00005
0.0000846]
Total Count of Valid Samples
12
12
11
11
11
11
11
11
10
11
11
11
11
11
O
O
11
11
11
11
11
11
31
6
6
6
6
6
6
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Statistics\Stats Review_DEQ Request\FINAL BG Analytical thru 2019-09 plus GW -1 Page 2 of 3

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2016-09 PLUS GW -1 CLUSTER
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Prepared by: TDP Checked by: RBI
Notes:
Analytical Parameter
PN
Water
Level
Temp
Red text indicates samples not used in determination of provisional preliminary background threshold values
DO
ORPLTurbidity
u = Bold highlighted concentration indicates exceedance
Antimony
Arsenic
Beryllium Boron
Cadmium
Chloride
Chromium
(VI) Chromium Cobalt
Iron
Manganese
Nickel
Nitrate
(as N)
Nitrate
Selenium
Sodium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Radium -226
Radium -228 Uranium
-233 Uranium
-234 Uranium
-236 Uranium
-238
Reporting Units
S.U.
ft
Deg C
Lumhos
mg/L
mV
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
pCi/L
pCi/L
ug/mL
ug/mL
ug/mL
ug/mL
15A NCAC 02L Standard
6.5-8.5
NE
NE
NEI
I.
10
4*
700
2
250
0.07A
10
1*
300
50
100
10
SO
20
NE
NE
250
0.2*
500
0.3*
NE
NE
NE
NE
NE
NE
Sample ID
SampleCollection Date
Field Parameters
Analytical Results
POTENTIAL WELLS TO INCLUDE IN BACKGROUND DATASET - JUSTIFICATION ATTACHED
GW -1 Cluster Results (not included above)
Saprolite
GW -1
12/14/2007
4.5
20.39
14
98
NM
NM
NM
NM
<5
6.3
NA
<IO
<I
8.2
NA
35.7
NA
56800
NA
34.1
NA
6.3
<10
NA
NA
<5
0.12
50
NA
NA
NA
NA
NA
NA
NA
GW -1
04/21/2008
3.8
19.78
I4
98
NM
NM
NM
NM
<5
<5
NA
<10
<1
<5
NA
<5
NA
2880
189
8.7
NA
8.2
<10
NA
NA
<5
<0.5
40
NA
NA
NA
NA
NA
NA
NA
GW -1
10/13/2008
4.4
19.95
13
72
NM
NM
NM
NM
<5
<5
NA
<50
<1
<5
NA
<5
NA
122
74.8
5
NA
5.2
<10
NA
NA
<5
<0.1
54
NA
NA
NA
NA
NA
NA
NA
GW -1
04/14/2009
4.3
19.70
14
89
NM
NM
NM
NM
<5
<5
NA
<50
<1
<5
NA
<5
NA
575
98.5
7.5
NA
7.7
<10
NA
NA
<5
<0.5
70
NA
NA
NA
NA
NA
NA
NA
GW -1
10/16/2009
4.5
19.82
14
102
NM
NM
NM
NM
<5
<5
NA
<50
<I
<5
I
NA
<5
NA
232
100
6.5
NA
8.2
<10
NA
NA
<5
<0.5
74
NA
NA
NA
NA
NA
NA
NA
GW -1
05/11/2010
3.1
19.63
13
106
NM
NM
NM
NM
<5
<5
NA
<50
<1
<5
NA
<5
NA
459
90.3
5
NA
8.6
<10
NA
NA
<5
<0.1
26
NA
NA
NA
NA
NA
NA
NA
GW -1
11/17/2010
4.5
20.16
11
69
NM
NM
NM
6.32
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
63.6
81
<5
NA
7.7
<10
NA
NA
<5
<0.1
46
NA
NA
NA
NA
NA
NA
NA
GW -1
04/12/2011 1
4.3
19.33
1 13
1 112
5.06
49
254
7.46
<0.5
<5
I NA
I <50
<5
11 <5
NA
<5
I NA
248
1 138
7.1 1
NA
10.9
<10
NA
NA
1 <5
<0.1 1
44
NA
NA
NA
NA
NA
NA
NA
GW -1
07/14/2011
4.3
19.88
16
87
5.01
-84
121
2.77
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
79.6
134
78
NA
7.5
<10
NA
NA
<5
<0.1
<25
NA
NA
NA
NA
NA
NA
NA
GW -1
11/09/2011
4.6
20.54
14
96
4.36 1
-82
1 123 1
2.28
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
102
205
5.9
NA
7.9
<10
NA
NA
<5
<0.1
86
NA
NA
NA
NA
NA
NA
NA
GW -1
04/10/2012
4.6
20.03
16
104
3.95
-67
138
3.07
<0.5
<5
NA
<50
<0.08
<5
NA
<5
NA
96
341
5.9
NA
8
<10
NA
NA
<5
<0.1
64
NA
NA
NA
NA
NA
NA
NA
GW -1
07/16/2012
4.4
19.92
16
93
2.92
297
502
7.98
<0.5
<5
NA
65.1
0.082
4.7
NA
<5
NA
147
310
<5
NA
7.1
<10
NA
NA
<2
<0.1
57
NA
NA
NA
NA
NA
NA
NA
GW -1
11/15/2012
4.6
20.69
15
96
2.26
348
553
5.76
<0.5
<5
NA
<50
0.1
4.9
NA
<5
NA
480
293
<5
NA
6
<10
NA
NA
3.1
<0.1
37
NA
NA
NA
NA
NA
NA
NA
GW -1
04/03/2013
4.5
20.68
15
93
2.48
137
342
2.57
<1
<1
NA
<50
<1
5.4
NA
<5
NA
31
442
<5
NA
5.9
2.04
NA
NA
1.9
<0.2
69
NA
NA
NA
NA
NA
NA
NA
GW -1
07/01/2013
4.8
20.47
17
125
3.42
12
217
2.17
<S
<1
NA
<50
<1
6.2
NA
<5
NA
49
612
6
NA
7.1
3.32
NA
NA
3.2
<0.2
80
NA
NA
NA
NA
NA
NA
NA
GW -1
11/05/2013
4.5
20.94
1 14
1 148
2.3
436
641
3.1
<1
<1
NA
<50
<1
1 7
NA
<5
NA
89
737
5 1
NA
7.8
4.9
NA
NA
15
<0.2
87
NA
NA
NA
NA
NA
NA
NA
GW -1
04/17/2014
4.6
20.55
15
138
1.6
290
495
8
<1
1.25
NA
<50
<1
6
NA
<5
NA
275
692
<5
NA
6.4
1.47
NA
NA
17
<0.2
75
NA
NA
NA
NA
NA
NA
NA
GW -1
07/10/2014
4.4
20.14
17
154
1.5
364
569
1.9
<1
1.61
NA
<50
<1
7.1
NA
<5
NA
84
683
<5
NA
6.2
1.53
NA
NA
24
<0.2
85
NA
NA
NA
NA
NA
NA
NA
GW -1
11/04/2014
4.7
20.95
17
155
0.98
337
542
8.62
<1
<1
NA
<50
<1
6.7
NA
<5
NA
568
534
<5
NA
4.1
1.56
NA
NA
27
<0.2
75
NA
NA
NA
NA
NA
NA
NA
GW -1
04/07/2015
4.8
20.81
15
123
0.89 1
121
1 326 1
0.67
<S
<1
<1
<50
<1
6.6
NA
<5
4.71
15
507
<5
NA
3.2
1.6
1.09
NA
25
<0.2
83
NA
NA
NA
NA
NA
NA
NA
GW -1
07/06/2015
4.8
20.58
19
137
1.1
263
468
4.99
<1
<1
<1
<50
<1
6.6
NA
<5
4.76
101
551
<5
3
13
1.78
1.05
<5
35
<0.2
78
<0.3
NA
NA
NA
NA
NA
NA
GW -1
11/02/2015
5.2
20.55
17
115
1.4
541
746
0.8
<1
<1
<1
<50
<1
6.6
NA
<5
3.79
26
397
<5
1.7
7.4
1.33
1.41
<5
27
0.21
67
<0.3
NA
NA
NA
NA
NA
NA
GW -1
12/09/2015
4.8
20.09
16
127
1.1
355
560
4.64
<0.5
0.94
0.23
<50
<0.08
6.7
1
1.2
5.6
<50
460
3.2
NA
NA
1.7
<5
<5
24.5
<0.1
84
<1 L3
NA
NA
NA
NA
NA
NA
GW -1
01/18/2016
4.8
20.19
1 15
1 161
1.8
397
602
8.02
<1
<1
<1
<50
I <1
1 5.5
1 0.87
1.2
6.13 1
104
725
1 3.4 1
NA
NA 1
1.53
1 1.13
1 <5
1 29 1
<0.2
82
<0.3
NA
NA
NA
NA
NA
NA
GW -1
04/05/2016
4.8
20.65
14
220
1.51
360
565
2.43
<1
1.26
<1
<50
<1
7.9
NA
<5
6.92
141
1070
<5
7.3
32
2.32
1.13
<5
52
<0.2
120
10.3
NA
NA
NA
NA
NA
NA
GW -1
07/06/2016
4.8
20.46
22
180
0.55
366
571
2.78
<S
<S
<1
<50
<S
6.9
NA
<5
5.06
29
668
<5
3.4
1562
2.17
1.32
<5
50
<0.2
120
<0.3
NA
NA
NA
NA
NA
NA
Total Count of Valid Samples (Including GW -i)
65
65
63
63
34
63
1 63
1 63
21
1 63
1 34
63
63
63
11
43 1
63
1 34
31
63
63
63
30
12
12
12
12
12
12
Transition Zone
GW -01D
05/07/2015
5.4
20.66
19
63
0.38
75
280
7.3
<1
<1
<1
<50
<1
5
NA
<1
7.77
951
369
2.5
NA
NA
<1
2.73
33
2.3
<0.2
35
0.451
NA
NA
NA
NA
NA
NA
GW -01D
05/28/2015
5.3
20.59
17
55
0.42
63
268
5.53
<1
<1
<1
<50
<1
5.3
NA
<1
4.02
295
240
1.44
NA
NA
<1
2.52
29
2.9
<0.2
41
<0.3
NA
NA
NA
NA
NA
NA
GW -01D
09/02/2015
5.2
20.67
21
56
0.89
283
488
3.92
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
GW -011)
12/09/2015
5.3
20.19
16
37
2.3
208
413
0.12
<0.5
<0.5
<0.2
<50
<0.08
3.2
0.072
<0.5
1.7
72
72
1.3
NA
NA
<0.5
<5
24
1.3
<0.1
<2S
<1 L3
NA
NA
NA
NA
NA
NA
GW -01D
01/18/2016
5.3
20.29
15
43
1.9
178
383
3.55
<1
<1
<1
<50
<1
4.2
0.091
<1
1.62
221
97
1.1
NA
NA
<1
2.09
25
1.4
<0.2
32
0.339
NA
NA
NA
NA
NA
NA
Total Count of Valid Samples
(Including GW -1D)
13
13
11
11
11
11
11
11
7
11
11
11
11
11
0
0
11
11
11
11
11
11
11
3
3
3
3
3
3
Bedrock
GW -0188
05/14/2015
7.0
23.71
19
162
2.42
57
<1
<1
<1
<50
<1
1.3
NA
<1
<1
1780
93
<1
NA
NA
<1
6.02
84
8.5
<0.2
110
0.575
NA
NA
NA
NA
NA
NA
GW-01SR
05/27/2015
7.8
22.67
20
171
2.13
-211
<1
<1
<1
<50
<1
1.5
NA
<1
<1
946
66
<1
NA
NA
<1
6.25
88
8.3
<0.2
110
1.08
NA
NA
NA
NA
NA
NA
GW-01BR
09/01/2015
9.0
22.61
19
186
0.6
-56
L6,24.
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
GW-01BR
12/09/2015
8.7
22.30
15
163
0.5
-191
<0.5
1.1
<0.2
<50
<0.08
1.7
<0.03
<0.5
<0.5
1100
56
<0.5
NA
NA
<0.5
8.33
98
3.7
<0.1
103
<1 L1
NA
NA
NA
NA
NA
NA
GW-01BR
01/18/2016
7.0
22.34
6
155
1
-81
<1
<1
<1
<50
<1
1.5
<0.03
<1
<1
1190
65
<1
NA
NA
<1
7.28
88
5.2
<0.2
110
0.317
NA
NA
NA
NA
NA
NA
Total Count of Valid Samples (Including GW-1BR)
14
1
13
13
13
13
1 13
13
11
13
13
13
13
13 1
O
O
13
13
13
13
13 1
13
13
6
is
6
6
6
6
Prepared by: TDP Checked by: RBI
Notes:
Red text indicates samples not used in determination of provisional preliminary background threshold values
(PPBTVs) - eliminated due to pH > 8.5 or turbidity >10 NTU or or pH and/or turbidity not measured
u = Bold highlighted concentration indicates exceedance
of the 15A NCAC 02L .0202 Standard, the IMAC, or the NC DHHS Screening Level for chromium VI. (Effective date for 15A NCAC 02L .0202 Standard and
IMAC is April 1, 2013)
= Value eliminated as outlier (through April 2016
analytical results)
Spec Cond = Specific Conductance
NA = Not analyzed
umhos/cm = Micro mhos per centimeter Temp = Temperature
NTU = Nephelometric turbidity unit
pCi/I = picocuries per liter
it = Feet
NM = Not Measured
mg/L = Milligram per liter DO = Dissolved oxygen
NE = Not established
Eh = Redox Potential
S.U. = Standard Unit
Deg. C = Degrees Celsius
mV = Millivolts ORP = Oxidation -Reduction Potential
ug/L = Microgram per liter
ug/mL = microgram per milliliter
mg - N/L = Milligram nitrogen per liter
= NC DHHS Health Screening Level.
< = Concentration not detected at or above the adjusted reporting limit
* = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
b = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than SOX the concentration in the method blank. Analyte concentration in sample could be due to blank contamination.
B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes.
j = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
L3 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high.
L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias.
Ml = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
S = Associated calibration check did not meet specified criteria.
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Statistics\Stats Review_DEQ Request\FINAL BG Analytical thru 2019-09 plus GW -1 Page 3 of 3

a
0
0
0
0
N
c\ -I
O
c -I

2,180
2,170
2,160
2,1 0
2,140
a)
,2 2,130
C
O
co
N 2,120
W
2,110
2,100
2,090
CCB -01 CCB -Oz CB -3R —GW -01 CB -8
CB -1 and GW -1 are not influenced by basin dewatering.
21 2.08
------
—
—
---
---
• • • • . Cove excavation early 2016
N
_______________••''•••./_2,140.7
CB -2 -11.33 feet decrease in water level elevation
b-0
a�
N
ON
z,112.39 CB -3R - 8.7 feet decrease in water level elevation
-------------------
0
b-0
2,103.69
— — — — — — — — — — — — — — — — — — — -
3
(�
CB -8 - Not influenced by 1982 basin ewatering
O
r-1 —1
r-1 N
N
N
m
m m d' dt C' k.0 l0 l0 l0
c -I
c -I r -I
N
r -I ,--I
O
,--I
O
,--I
O
r-1
O
r-1 —I r -I c -I r -I r-1 c -I ri ri ri ri ri ri —1
O O O O O O O O O O O O O O
r -I
r14
(V
r4
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FIGURE 1-80
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
WATER ELEVATIONS TIME SERIES PLOT
PHONE [phone]
www.synterracorp.com
COMPLIANCE BOUNDARY WELLS
DRAWN BY: B.WILKER DATE: JULY2016
PROJECT MANAGER: T. PLATING
ASHEVILLE STEAM ELECTRIC PLANT
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