HF Lee BG GW FINAL Dec 2016_20171006

TECHNICAL MEMORANDUM
Date: December 15, 2016 File: 1026.104.19
To: Ryan Czop (Duke Energy)
Cc: Kathy We b (SynT ra)
From: Judd Mahan
Subject: Quantification f Valid Background Groundwater Data-H.F. Lee Energy Complex
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 H.F. Lee Energy Complex (Site). A summary of background well analytical
results was originally presented in the Corrective Action Plan, Part 1 submitted November 2015
and updated in the CSA Supplement 1 submitted September 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. Groundwater sample locations
are shown on Figures 1 and 2. The following discussion quantifies the number of valid results
to date within each flow zone for evaluation of PPBTVs at the Site.
BACKGROUND WELL DATA ANALYSIS
The current background monitoring well network consists of wells installed within three flow
zones (surficial, Cape Fear, and Black Creek). Samples from these wells must meet the
following criteria to be considered valid for determining PPBTVs:
+fir Sample pH is less than or equal to (<) 8.5 standard units (S.U.);
tY Sample turbidity is less than or equal to (<) 10.0 Nephelometric Turbidity Units (NTUs);
and
1T Result is not a statistical outlier identified for background sample data collected through
April 2016 (SynTerra, September 16, 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. No
samples for H.F. Lee were retained where pH exceeded 8.5 S.U. or turbidity was greater than 10
NTUs. For H.F. Lee, two samples with pH greater than 8.5 and ten samples with turbidity
greater than 10 NTUs were eliminated. One of the samples eliminated exceeded both pH and
turbidity requirements. A discussion of the available data set for background wells and validity
of samples from each flow zone is included below.
P: \ Duke Energy Progress.1026 \ Background Soil and Groundwater Memo \ Groundwater \ HF Lee Background
Groundwater Tech Memo - Final.docx

Quantification of Valid Background Groundwater Data December 15, 2016
H.F. Lee Energy Complex Page 2 of 4
SURFICIAL
Eight background wells (IMW-1S, IMW-3S, AMW-11S, AMW-12S, AMW-13S, AMW-17S, SMW-
2 and CCR-100S) are screened within surficial deposits.
Surficial Groundwater pH
The pH of all samples collected from all surficial groundwater background wells have
consistently been less than 8.5 S.U.
Surficial Groundwater Turbidity
41, The turbidity of one groundwater sample from background well AMW-13S was greater
than 10 NTUs.
The turbidity of one groundwater sample from background well SMW-2 was greater
than 10 NTUs.
[y The turbidity of two groundwater samples collected from background well IMW-3S was
greater than 10 NTUs.
01 Turbidity results were < 10 NTUs for samples collected from background wells IMW-1S,
AMW-11S, AMW-12S, AMW-17S, and CCR-100S.
The minimum number of background data points necessary to run statistics is satisfied for all
parameters if valid data from background wells IMW-1S, IMW-3S, AMW-11S, AMW-12S,
AMW-17S, SMW-2 and CCR-100S is used. This assessment does not take into consideration the
potential for statistical outliers for analytical results received past March 2016.
CAPE FEAR
Seven background wells (IMW-1BC, IMW-02BC, IMW-03BC, AMW-11BC, AMW-12BC, AMW-
13BC, and AMW-16BC) are screened in Cape Fear deposits.
Cape Fear Groundwater pH
The pH of all but two samples collected from Cape Fear background wells have consistently
been less than 8.5 S.U.
47, The pH for a sample from AMW-13BC on March 5, 2015 was greater than 8.5 S.U.
i7, The pH for a sample from IMW-2BC on June 7, 2016 was greater than 8.5 S.U.
P: \ Duke Energy Progress.1026 \ Background Soil and Groundwater Memo \ Groundwater \ HF Lee Background
Groundwater Tech Memo - Final.docx

Quantification of Valid Background Groundwater Data December 15, 2016
H.F. Lee Energy Complex Page 3 of 4
Cape Fear Groundwater Turbidity
La The turbidity of one groundwater sample from background well AMW-13BC was
greater than 10 NTUs.
41, The turbidity of two groundwater samples from background well IMW-2BC was greater
than 10 NTUs.
y The turbidity of two groundwater samples collected from background well IMW-3BC
was greater than 10 NTUs.
L11 Turbidity results were < 10 NTUs for samples collected from background wells IMW-
1BC, AMW-11BC, AMW-12BC, and AMW-16BC.
The minimum number of background data points necessary to run statistics is satisfied for all
parameters if valid data from background wells IMW-1BC, IMW-02BC, IMW-03BC, AMW-
11BC, AMW-12BC, AMW-13BC, and AMW-16BC is used. This assessment does not take into
consideration the potential for statistical outliers for analytical results received past March 2016.
BLACK CREEK
One background well (AMW-17BC) is screened within Black Creek deposits.
Black Creek pH
�y The pH of the sample for AMW-17BC shown on Table 1(August 10, 2016) is 7.3. The
table reports data through September 2016. Two additional samples with pH below 8.5
S.U. were collected from AMW-17BC in October and November 2016.
Black Creek Turbidity
47 The turbidity of the sample for AMW-17BC shown on Table 1(August 10, 2016) is 16.8
NTUs. The additional sample from AMW-17BC collected in October was below 10
NTUs; however, the November sample remained above 10 NTUs and falls outside the
valid criteria.
Table 1 was prepared with sampling data through September 2016. The one sample for AMW-
17BC collected through that timeframe is not within the required turbidity limits. One sample
collected after September 2016 (but not yet incorporated into the included background data set)
appears to be a valid sample. It is projected that the minimum number of background data
necessary to run statistics would be achieved in January 2018 based upon a two month
sampling frequency. These projections do not take into consideration the potential for statistical
outliers.
P: \ Duke Energy Progress.1026 \ Background Soil and Groundwater Memo \ Groundwater \ HF Lee Background
Groundwater Tech Memo - Final.docx

Quantification of Valid Background Groundwater Data December 15, 2016
H.F. Lee Energy Complex Page 4 of 4
ATTACHMENTS:
Table 1: Background Analytical Results through September 2016
Figure 1: Well Location Map - Inactive Basin
Figure 2: Well Location Map - Active Basin
P: \ Duke Energy Progress.1026 \ Background Soil and Groundwater Memo \ Groundwater \ HF Lee Background
Groundwater Tech Memo - Final.docx

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2O16-09
H.F. LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS, LLC, GOLDSBORO, NC
Anal tical Parameter
y
PN
Water
Level
Temp
Spec
Cond
DO
ORP
Eh
Turbidity
Alkalinity
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Molybdenum
Reporting Units
S.U.
ft
Deg C
umhos/cm
mg/L
mV
mV
NTUs
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02L Standard
6.s-8.5
NE
NE
NE
NE
NE
NE
NE
NE
NE
1*
10
700
4*
700
2
0.07^
10
1*
1000
300
15
So
1
NE
Sample ID
Sample
Collection Date
Field Parameters
Analytical Results
Surficial
AMW-115
03/02/2015
5.6
4.40
13
82
1.76
9
214
6.96
11
51
<1
<1
16
<1
<50
<1
NA
<1
12.5
<1
252
<1
476
<0.05
<1
AMW-11S
06/11/2015
4.4
6.50
17
70
1.55
293
498
2.84
<10
109
<1
<1
119
<1
<50
<1
NA
<1
9.13
<1
60
<1
139
<0.05
<1
AMW-11S
09/24/2015
5.3
8.55
19
56
2.4
193
398
5.34
NA
289
<1
<1
64
<1
<50
<1
NA
<1
7.65
1.33
973
<1
131
<0.05
<1
AMW-11S
12/04/2015
5.0
5.38
16
57
5
322
527
1.35
<5
76
<1
<1
95
<1
<50
<1
0.041
<1
7.96
<1
44
<1
96
<0.05
<1
AMW-11S
O1/12/2016
5.1
3.73
16
57
1.23
141
346
1.69
<5
129
<1
<1
119
<1
<50
<1
0.049
<1
7.54
<1
31
<1
74
<0.05
<1
AMW-11S
03/O1/2016
4.9 S
3.95
15
57 S
1.76 S
248
453
2.4
<5
172
<1
<1
124
<1
<50
<1
0.035
<1
6.76
<1
14
<1
45
<0.05
<1
AMW-11S
06/07/2016
4.7
6.41
18
63
4.09
327
532
1.87
<5
186
<1
<1
135
<1
<50
<1
0.046
<1
6.59
<1
83
<1
40
<0.05
<1
AMW-11S
08/03/2016
4.8
6.80
20
63
3.47
169
374
2.31
<5
160
<1
<1
128
<1
<50
<1
0.085
<1
6.58
<1
154
<1
43
<0.05
<1
AMW-12S
03/02/2015
5.4
5.20
13
111
7.1
143
348
9.1
<10
272
<1
<1
177
<1
<50
<1
NA
<1
4.05
1.37
333
<1
67
<0.05
1.34
AMW-12S
06/10/2015
4.4
10.08
21
95
2.55
146
351
3.06
<10
1100
<1
<1
152
<1
<50
<1
NA
<1
3.17
5.61
60
<1
20
<0.05
<1
AMW-12S
12/04/2015
4.1
10.80
11
98
0.4
56
261
1.7
<5
19
<1
<1
47
<1
<50
<1
<0.03
<1
<1
<1
8720
<1
176
<0.05
<1
AMW-12S
O1/11/2016
4.2
7.80
15
90
3.4
371
576
7.1
<5
940
<1
<1
137
<1
<50
<1
0.085
<1
2.91
5.51
209
<1
19
<0.05
<1
AMW-12S
03/01/2016
4.3
7.11
17
97
4.91
299
504
1.2
<5
889
<1
<1
130
<1
<50
<1
0.088
<1
3.01
5.22
50
<1
17
<0.05
<1
AMW-12S
06/08/2016
4.1
9.29
22
99
3.63
373
578
2.85
<5
731
<1
<1
122
<1
<50
<1
0.14
<1
2.14
4.39
25
<1
16
<0.05
<1
AMW-12S
08/04/2016
4.0
14.03
21
90
3.53
295
500
5.09
<5
593
<1
<1
105
1.24
<50
<1
0.13
<1
2.09
3.96
111
<1
14
<0.05
<1
AMW-13S
0310312015
5.7
4.47
11
237
2.9
-117
88
60.5
43
3560
<1
<1
136
<1
<50
<1
NA
3.78
35.7
2.2
2380
<1
727
<0.05
<1
AMW-13S
06/10/2015
5.2
12.19
21
200
2.18
176
381
4.06
26
12
<1
<1
96
<1
<50
<1
NA
<1
<1
4.81
66
<1
26
<0.05
<1
AMW-13S
12/04/2015
5.9
8.90
18
86
4.6
99
304
1
16.2
26
<1
<1
52
<1
<50
<1
0.033
<1
2.29
<1
34
<1
12
<0.05
<1
AMW-13S
O1/11/2016
6.7
3.08
16
211
1.92
98
303
3.46
17.7
286
<1
<1
73
<1
<50
<1
0.095
<1
8.06
<1
122
<1
24
<0.05
<1
AMW-13S
03/01/2016
5.6
3.75
16
84
5.61
212
417
7.7
13.6
159
<1
<1
47
<1
<50
<1
0.094
<1
1.18
<1
415
<1
<5
<0.05
<1
AMW-13S
06/08/2016
5.3
10.96
18
179
4.2
217
422
0.68
21.3
21
<1
<1
88
<1
<50
<1
0.11
<1
<1
<1
28
<1
<5
<0.05
<1
AMW-13S
08/03/2016
5.5
11.32
22
94
4.61
302
507
0.99
16.6
17
<1
<1
49
<1
<50
<1
0.31
<1
<1
<1
14
<1
1<5
<0.05
<1
AMW-17S
07/28/2016
4.6
6.01
23
134
1.94
450
655
2.34
<5
474
<1
<1
73
<1
63
<1
<0.03
<1
2.21
1.33
49
<1
38
<0.05
<1
CCR-100S CAMA
07/20/2016
4.6
26.32
20
169
5.89
446
651
8.53
<5
320
<1
<1
528
<1
<50
<1
<0.03
<1
5.64
3.52
70
2.61
119
<0.05
<1
IMW-15
05/26/2015
5.4
4.72
20
172
0.43
66
271
8.9
12
171
<1
<1
194
<1
<50
<1
NA
<1
6.21
<1
3150
<1
258
<0.05
<1
IMW-15
06/12/2015
5.6
5.29
19
166
0.53
205
1 410
1.73
11
70
<1
I <1
206
<1
<50
1 <1
NA
<1
4.36
<1
2230
<1
234
<0.05
<1
IMW-15
09/24/2015
5.3
7.80
20
158
0.5
150
355
0.67
NA
97
<1
<1
208
<1
<50
<1
NA
<1
2.43
<1
195
<1
102
<0.05
<1
IMW-15
12/06/2015
5.5
3.63
17
283
0.96
103
308
7.35
7.6
110
<0.5
<0.5
190
0.44
<50
0.126
<0.03
<0.5
3.4
<1
2100
0.15
130
<0.2
<0.5
IMW-15
03/01/2016
5.1
3.53
16
152
1.6
94
299
7.7
<5
67
<1
<1
188
<1
<50
<1
0.11
<1
3.86
<1
1290
<1
131
<0.05
<1
IMW-15
06/07/2016
5.2
3.77
18
153
0.6
104
309
2.8
<5
33
<1
<1
179
<1
<50
<1
0.18
<1
3.95
<1
411
<1
107
<0.05
I <1
IMW-15
08/03/2016
4.9
4.47
20
150
1.46
310
515
1.29
<5
43
<1
<1
216
1.07
<50
<1
0.5
<1
3.68
<1
114
<1
89
<0.05
<1
IMW-3S
05/28/2015
5.8
3.28
21
136
4.13
47
252
9.54
50
76
<1
<1
154
<1
<50
<1
NA
<1
13.3
<1
4220
<1
556
<0.05
<1
IMW-3S
06/16/2015
5.7
3.40
26
135
2.23
-44
161
4.62
56
22
<1
I <1
142
<1
<50
<1
NA
<1
12.2
<1
6320
<1
722
<0.05
<1
IMW-3S
12/06/2015
6.4
1.45
14
215
0.4
-46
159
3.82
91
<100
<0.5
<0.5
230
<0.2
<50
<0.08
<0.03
<0.5
14.9
<1
25900
<0.1
880
<0.2
<0.5
IMW-3S
0111312016
6.4
1.40
14
150
0.3
-66
139
55.7
79.5
115
<1
<1
236
<1
<50
<1
<0.03
5.42
16.2
<1
35100
<1
822
<0.05
<1
IMW-3S
0310212016
6.3
1.38
16
165
0.49
165
370
14.5
65.7
33
<1
<1
188
<1
<50
<1
<0.03
<1
9.9
<1
14700
1 <1
571
<0.05
<1
IMW-3S
06/08/2016
6.6
1.73
20
272
0.2
-94
111
2.6
73.9
68
<1
<1
225
<1
<50
<1
<0.15 D3
<1
12.5
<1
34500
<1
760
<0.05
<1
IMW-3S
08/03/2016
6.5
2.49
24
295
0.23
-19
186
2.13
87.8
70
<1
1.08
276
<1
<50
<1
<0.6 D3
<1
15.8
<1
43200
<1
690
<0.05
<1
SMW-2
0912412013
5.5
NM
17
192
1.61
62
NM
22.4
37.3
NA
<0.34
2.6
23.9
NA
48.6 j
<0.23
NA
<1.6
NA
<2.7
5040
0.37 j
133
<0.06
NA
SMW-2
06/16/2015
4.9
25.50
24
152
3.88
1 244
449
1 4.98
<10
423
<1
I <1
338
<1
<50
<1
NA
<1
1.62
<1
100
<1
61
<0.05
<1
SMW-2
03/04/2016
4.7
24.35
10
154
6.69
260
465
9.7
<5
611
<1
<1
426
<1
<50
<1
<0.03
<1
2.51
1.46
129
<1
67
<0.05
<1
SMW-2
06/07/2016
4.7
25.76
22
175
4.77
293
498
2.48
<5
305
<1
<1
455
<1
<50
<1
<0.03
<1
2.11
<1
18
<1
70
<0.05
<1
Total Count of Valid Samples
38
38
36
37
38
38
38
38
38
38
26
38
38
38
1 36
1 38
36
38
38
Black Creek
AMW-17BC 0811012016
7.3
5.30 23 429 0.48 201 406
16.8
105
141
<1
<1
44
<1
262
<1
0.16
<1
i.11
1.17
507
11
52
<0.05
1.04
Total Count of Valid Samples
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
O
0
O
Cape Fear
AMW-116C
03/02/2015
7.1
3.78
15
1498
0.15
-487
-282
9.9
51
79
<1
<1
6
<1
<50
<1
NA
<1
2.75
<1
6300
<1
1220
<0.05
1.36
AMW-11BC
06/11/2015
7.2
6.03
19
134
0.35
-168
38
4.62
51
19
<1
<1
6
<1
<50
<1
NA
<1
1.05
<1
3290
<1
983
<0.05
1.63
AMW-11BC
09/24/2015
7.6
7.61
19
137
0.29
-230
-25
5.13
NA
164
<1
<1
6
<1
<50
<1
NA
<1
<1
<1
1460
<1
600
<0.05
2.44
AMW-11BC
12/04/2015
7.2
4.90
13
161
0.24
-222
-17
2.63
60.2
52
<1
<1
8
<1
<50
<1
<0.03
<1
<1
<1
4910
<1
1380
<0.05
2.05
AMW-11BC
O1/12/2016
7.1
3.35
15
154
0.21
-171
34
6.55
60.6
129
<1
<1
9
<1
<50
<1
<0.03
<1
1.41
<1
6750
<1
1520
<0.05
1.52
AMW-11BC
03/01/2016
6.9 S
3.26
15
167 S
0.51 S
-181
24
7.6
61.6
34
<1
<1
9
<1
<50
<1
<0.03
<1
1.23
<1
7460
<1
1560
<0.05
1.55
AMW-11BC
06/08/2016
7.4
5.95
18
171
0.2
-193
12
8.4
68.9
197
<1
<1
10
<1
<50
<1
<0.03
<1
<1
<1
7260
<1
1470
<0.05
1.54
AMW-11BC
08/03/2016
6.8
6.21
21
180
0.26
-106
99
6.03
67.2
85
<1
<1
11
<1
<50
<1
1.2
<1
<1
I <1
1 9820
<1
1 1680
<0.05
1.55
AMW-12BC
03/03/2015
6.2
6.45
10
175
0.5
-399
-194
5.73
36
36
<1
<1
11
<1
<50
<1
NA
<1
1.19
<1
3260
<1
285
<0.05
<1
AMW-12BC
06/10/2015
6.3
11.19
22
142
0.67
54
259
3.82
38
31
<1
<1
13
<1
<50
<1
NA
<1
<1
<1
12600
<1
287
<0.05
<1
AMW-12BC
12/04/2015
6.2
11.90
11
112
0.6
-10
195
1
23.6
838
<1
<1
132
<1
<50
<1
0.054
<1
2.46
5.23
75
<1
16
<0.05
<1
P:\Duke Energy Progress. 1026\104. Lee Ash Basin GW Assessment\Background Summaries\Groundwater\HF Lee_BG Analytical thru 2016-09 Page 1 of 4

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2O16-09
H.F. LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS, LLC, GOLDSBORO, NC
Analytical Parameter
Nickel
Potassium
Selenium
Sodium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Zinc
Radium-226
Radium-228
Uranium-233
Uranium-234
Uranium-236
Uranium-238
Reporting Units
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
ug/L
pCi/L
pCi/L
ug/mL
ug/mL
ug/mL
ug/mL
15A NCAC 02L Standard
100
NE
20
NE
NE
250
0.2*
Soo
0.3*
1000
NE
NE
NE
NE
NE
NE
Sample ID
Sample
Collection Date
Analytical Results
Surficial
AMW-11S
03/02/2015
4.53
1.32
<1
6.3
32
5.7
<0.2
55
<0.3
6
NA
NA
NA
NA
NA
NA
AMW-11S
06/11/2015
3.52
1.26
<1
6.09
31
6.2
<0.2
48
<0.3
7
NA
NA
NA
NA
NA
NA
AMW-11S
09/24/2015
4.53
0.741
<1
5.64
17
NA
<0.2
NA
0.56
13
NA
NA
NA
NA
NA
NA
AMW-11S
12/04/2015
3.73
0.964
<1
4.92
23
5.4
<0.2
32
<0.3
8
NA
NA
NA
NA
NA
NA
AMW-11S
01/12/2016
3.83
1.07
<1
5.14
24
4.8
<0.2
41
<0.3
9
NA
NA
NA
NA
NA
NA
AMW-11S
03/01/2016
3.18
1.18
<1
4.47
24
5.8
<0.2
28
<0.3
9
<1
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-115
06/07/2016
3.03
1.33
<1
4.86
24
7
<0.2
25
<0.3
7
0.824
0.87
<0.00005
<0.00005
<0.00005
0.00202
AMW-11S
08/03/2016
2.87
1.32
<1
5.08
23
6.5
<0.2
30
<0.3
13
0.735
0.927
<0.00005
<0.00005
<0.00005
<0.0002
AMW-12S
03/02/2015
5.34
2.56
<1
6.6
59
3.2
<0.2
72
<0.3
20
NA
NA
NA
NA
NA
NA
AMW-12S
06/10/2015
4.21
2.47
<1
4.25
26
4.9
<0.2
56
<0.3
14
12
11.4
<0.00005
<0.00005
<0.00005
0.00224
AMW-12S
12/04/2015
2.1
0.745
<1
7.82
28
6.4
<0.2
43
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-12S
01/11/2016
3.69
2.29
<1
4.08
24
4
<0.2
41
0.471
12
NA
NA
NA
NA
NA
NA
AMW-12S
03/01/2016
3.55
2.22
<1
4.06
23
2.4
<0.2
40
<0.3
12
5.05
12.7
<0.00005
<0.00005
<0.00005
0.002
AMW-12S
06/08/2016
2.56
2.12
<1
3.88
22
3.9
<0.2
47
<0.3
8
11.2
10.7
<0.00005
<0.00005
<0.00005
<0.0002
AMW-12S
08/04/2016
2.5
2.13
<1
3.44
20
4
<0.2
54
0.387
9
13.3
8.96
<0.00005
<0.00005
<0.00005
0.00197
AMW-13S
0310312015
12.5
0.474
<1
22.7
78
14
<0.2
210
6.71
22
NA
NA
NA
NA
NA
NA
AMW-13S
06/10/2015
7.28
0.197
<1
20.3
66
16
<0.2
140
<0.3
12
NA
NA
NA
NA
NA
NA
AMW-13S
12/04/2015
3.99
0.1
<1
8.51
30
15
<0.2
83
<0.3
13
NA
NA
NA
NA
NA
NA
AMW-13S
01/11/2016
8.73
0.158
<1
12
42
18
<0.2
86
0.398
25
NA
NA
NA
NA
NA
NA
AMW-13S
03/01/2016
3.58
0.14
<1
7.21
34
15
<0.2
67
0.59
25
0.672
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-13S
06/08/2016
4.6
0.268
<1
18.5
59
15
<0.2
120
<0.3
10
1.17
<1
<0.00005
<0.00005
<0.00005
0.000149j
AMW-13S
08/03/2016
3.32
0.189
<1
10
34
14
<0.2
75
<0.3
10
<1
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-17S
07/28/2016
1.12
3.76
<1
9.57
49
35
<0.2
80
<0.3
14
0.765
0.996
<0.00005
<0.00005
<0.00005
<0.0002
CCR-100S LAMA
07/20/2016
3.16
4.66
<1
3.74
92
4.9
<0.2
110
0.462
6
1.55
2.29
<0.00005
<0.00005
<0.00005
0.000119 3
IMW-15
05/26/2015
3.8
1.58
1.14
7.78
115
24
<0.2
97
0.627
14
NA
NA
NA
NA
NA
NA
IMW-15
06/12/2015
3.61
1.72
<1
7.8
123
25
<0.2
110
<0.3
77
NA
NA
NA
NA
NA
NA
IMW-15
09/24/2015
2.92
1.8
<1
7.22
125
NA
<0.2
NA
<0.3
16
NA
NA
NA
NA
NA
NA
IMW-15
12/06/2015
2.9
<5
0.75
7.61
110
20
<0.1 B
81
<1
<10
NA
NA
NA
NA
NA
NA
IMW-1S
03/01/2016
3.23
1.57
<1
7.97
109
22
<0.2
88
0.313
14
0.842
<3
<0.00005
<0.00005
<0.00005
<0.0002
IMW-15
06/07/2016
3.3
1.52
<1
6.97
122
22
<0.2
110
<0.3
11
0.595
0.951
<0.00005
<0.00005
<0.00005
<0.0002
IMW-1S
08/03/2016
3.02
1.75
<1
7.77
106
23
<0.2
93
<0.3
11
0.678
<1
<0.00005
<0.00005
<0.00005
<0.0002
IMW-3S
05/28/2015
7.17
1.17
<1
6.94
61
1.5
<0.2
85
<0.3
8
NA
NA
NA
NA
NA
NA
IMW-3S
06/16/2015
6.22
1.5
<1
8.05
67
1.4
<0.2
94
<0.3
16
NA
NA
NA
NA
NA
NA
IMW-3S
12/06/2015
4.5
<5
<0.5
6.85
100
<1
<0.1
132
<1
<10
NA
NA
NA
NA
NA
NA
IMW-35
0111312016
7.96
1.51
<1
7.14
107
<0.1
<0.2
110
<0.3
<5
NA
NA
NA
NA
NA
NA
IMW-3S
0310212016
5.63
1.41
<1
7.06
80
0.34
<0.2
120
<0.3
<5
<1
<3
<0.00005
<0.00005
<0.00005
<0.0002
IMW-3S
06/08/2016
4.8
1.38
<1
6.29
109
0.24
<0.2
120
<0.3
<5
0.519
0.855
<0.00005
<0.00005
<0.00005
0.000294
IMW-3S
08/03/2016
6.42
1.23
<1
5.68
91
0.29
<0.2
110
<0.3
6
1.1
0.983
<0.00005
<0.00005
<0.00005
<0.0002
SMW-2
0912412013
1.8 j
5.73
<0.5
23.4
NA
27.8
<0.15
152
NA
65.4
NA
NA
NA
NA
NA
NA
SMW-2
06/16/2015
2.02
3.33
<1
3.95
93
4.3
<0.2
110
0.307
16
NA
NA
NA
NA
NA
NA
SMW-2
03/04/2016
2.73
4.09
<1
3.6
85
7
<0.2
120
0.402
15
NA
NA
NA
NA
NA
NA
SMW-2
06/07/2016
1.72
4.08
<1
3.01
103
4.4
<0.2
120
0.323
13
0.843
<1
<0.00005
<0.00005
<0.00005
<0.0002
Total Count of Valid Samples
38
1 38
38
1 38
37
1 36
1 38
1 36
1 37
137
18
18
16
18
18
18
Black Creek
AMW-17BC 1 0811012016
2.95
6
<1
40.1
153
65
<0.2
220
1.15
<5
1.05
<1
<0.00005
<0.00005
<0.00005
0.000622
Total Count of Valid Samples
0.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Cape Fear
AMW-11BC
03/02/2015
1.26
0.691
<1
6.19
29
1.8
<0.2
<250
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-11BC
06/11/2015
<1
0.781
<1
6.56
33
<0.1
<0.2
86
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-11BC
09/24/2015
<1
0.851
<1
7.54
37
NA
<0.2
NA
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-11BC
12/04/2015
<1
0.671
<1
6.29
39
<0.1
<0.2
83
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-11BC
01/12/2016
<1
0.701
<1
5.84
39
<0.1
<0.2
92
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-11BC
03/01/2016
<1
0.666
<1
5.34
38
<0.1
<0.2
78
<0.3
<5
0.469
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-11BC
06/08/2016
<1
1.5
<1
6.45
47
<0.1
<0.2
74
0.361
<5
1
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-11BC
08/03/2016
<1
1.12
<1
5.63
43
<0.1
<0.2
85
0.415
<5
0.894
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-12BC
03/03/2015
2.2
2.19
<1
16.5
46
17
<0.2
110
<0.3
6
NA
NA
NA
NA
NA
NA
AMW-12BC
06/10/2015
<1
0.875
<1
11.3
34
8.4
<0.2
87
<0.3
<5
<1
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-12BC
12/04/2015
3.25
2.22
<1
3.78
23
8.5
<0.2
68
<0.3
17
NA
NA
NA
NA
NA
NA
P:\Duke Energy Progress. 1026\104. Lee Ash Basin GW Assessment\Background Summaries\Groundwater\HF Lee_BG Analytical thru 2016-09 Page 2 of 4

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2O16-09
H.F. LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS, LLC, GOLDSBORO, NC
Analytical Parameter
y
PN
Water
Level
Temp
Spec
Cond
DO
ORP
Eh
Turbidity
Alkalinity
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Molybdenum
Reporting Units
S.U.
ft
Deg C
umhos/cm
mg/L
mV
mV
NTUs
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02L Standard
6.5-8.5
NE
NE
NE
NE
NE
NE
NE
NE
NE
1*
10
700
4*
700
2
0.07A
10
1*
1000
300
15
50
1
NE
Sample ID
Sample
Collection Date
Field Parameters
Analytical Results
AMW-12BC
01/11/2016
6.1
8.60
15
97
0.3
-43
163
1.8
31.5
21
<1
1.12
44
<1
<50
<1
<0.03
<1
<1
<1
9280
<1
ISO
<0.05
<1
AMW-12BC
03/01/2016
6.3
7.82
16
120
0.62
3
208
0.8
22.4
17
<1
1.17
44
<1
<50
<1
<0.03
<1
<1
<1
9020
<1
167
<0.05
<1
AMW-12BC
06/08/2016
5.9
10.48
20
113
0.45
-17
188
4.42
20.5
13
<1
<1
49
<1
<50
<1
<0.03
<1
<1
<1
3780
<1
143
<0.05
<1
AMW-12BC
08/04/2016
5.7
15.92
21
105
0.36
119
324
9.73
27.7
17
<1
<1
43
<1
<50
<1
<0.03
<1
<1
<1
5810
<1
149
<0.05
<1
AMW-13BC
0310512015
8.9
4.54
18
360
0.07
-374
-169
69.2
110
372
<1
<1
163
<1
70
<1
NA
<1
<1
1.63
3620
<1
43
<0.05
2.28
AMW-13BC
06/10/2015
6.6
12.19
22
317
0.42
-85
120
8.24
100
75
<1
<1
342
<1
73
<1
NA
<1
<1
<1
10800
<1
99
<0.05
<1
AMW-13BC
12/04/2015
7.2
9.23
15
309
0.5
-139
1 66
1 1
118
69
<1
<1
269
<1
67
<1
<0.03
<1
<1
<1
9880
<1
118
<0.05
<1
AMW-13BC
01/11/2016
7.4
3.20
16
310
0.4
-129
76
1.84
114
69
<1
<1
255
<1
70
<1
<0.03
<1
<1
<1
8750
<1
126
<0.05
<1
AMW-13BC
03/01/2016
7.1
3.96
17
311
0.3
-133
72
0.9
118
31
<1
<1
272
<1
68
<1
<0.03
<1
<1
<1
9100
<1
117
<0.05
<1
AMW-13BC
06/08/2016
6.7
10.62
19
313
0.27
-165
40
0.97
114
68
<1
<1
344
<1
68
<1
<0.03
<1
<1
<1
10800
<1
102
<0.05
<1
AMW-13BC
08/03/2016
7.0
11.62
21
305
0.25
-41
164
4.82
117
79
<1
<1
325
<1
69
<1
0.65 M6
<1
<1
<1
10700
<1
104
<0.05
<1
AMW-16BC
07/20/2016
6.6
27.02
21
297
2.5
322
527
5.93
41
19
<1
<1
16
<1
<50
<1
0.058
<1
12.4
<1
16
<1
48
<0.05
<1
IMW-IBC
05/27/2015
6.4
1 4.25
21
427
2.82
147
352
9.43
70
15
<1
<1
95
<1
156
<1
NA
1.52
<1
<1
147
<1
159
<0.05
4.78
IMW-IBC
06/12/2015
6.7
4.63
22
419
2.13
203
1 408
1 2.66
74
14
<1
<1
101
<1
171
<1
NA
<1
<1
<1
98
<1
66
<0.05
3.74
IMW-IBC
09/24/2015
6.8
6.97
20
451
0.4
-76
129
2.1
NA
35
<1
<1
98
<1
164
<1
NA
<1
<1
<1
4380
<1
III
<0.05
2.64
IMW-IBC
12/06/2015
7.0
3.40
16
478
0.3
-90
115
1.84
83
<100
<0.5
0.87
100
<0.2
150
<0.08
<0.03
<0.5
0.73
<1
6500
<0.1
110
<0.2
1.9
IMW-IBC
01/12/2016
6.8
3.20
14
250
0.4
-80
125
3.7
82.7
55
<1
<1
108
<1
158
<1
<0.03
<1
<1
<1
5490
<1
132
<0.05
1.97
IMW-IBC
03/04/2016
6.9
3.36
8
447
0.79
143
348
9.7
89.9
39
<1
<1
96
<1
156
<1
<0.03
<1
<1
<1
583
<1
8o
<0.05
4.25
IMW-1BC
06/07/2016
6.8
3.69
1 22
455
1.3
88
293
7.5
91.9
47
<1
I<1
99
<1
153
<1
0.052
<1
<1
1.69
890
<1
17
<0.05
2.52
IMW-IBC
08/03/2016
6.7
4.40
22
445
0.6
259
464
7.38
93.6
18
<1
<1
101
<1
153
<1
0.038
<1
<1
<1
493
<1
28
<0.05
1.82
IMW-28C
0512612015
7.8
3.61
23
521
0.7
-137
1 68
1 12
130
78
<1
1.61
41
<1
293
<1
NA
<1
<1
<1
364
<1
38
<0.05
9.96
IMW-2BC
0611212015
8.0
3.80
23
587
0.46
124
329
15.8
180
410
<1
2.21
39
<1
331
<1
NA
<1
<1
<1
771
<1
50
<0.05
30.3
IMW-2BC
12/06/2015
7.7
3.76
15
616
0.5
-120
85
7.33
186
240
0.56
1.5
45
<0.2
320
<0.08
<0.03
<0.5
<0.5
<1
660
<0.1
75
<0.2
12.7
IMW-2BC
01/13/2016
8.0
3.51
10
600
0.65
108
313
7.96
197
1 243
<1
1.69
42
1<1
308
<1
<0.03
2.24
<1
<1
572
<1
47
<0.05
19.1
IMW-2BC
03/03/2016
8.2
1 3.75
14
1 610
0.36
-210
-5
9.98
198
682
<1
1.36
34
<1
315
<1
1 0.036
<1
<1
<1
745
<1
25
<0.05
23.4
IMW-2BC
0610712016
8.6
3.55
21
663
0.4
-58
147
8.5
206
156
<1
1 1.37
35
<1
289
<1
<0.03
1.51
<1
<1
423
1 <1
30
<0.05
17.6
IMW-2BC
08/03/2016
8.3
3.50
22
604
0.31
-45
160
5.79
201
160
<1
1.37
40
<1
284
<1
0.046
<1
<1
<1
245
<1
29
<0.05
12.4
IMW-3BC
0512712015
6.3
3.06
26
198
2.57
33
1 238
1 17
82
31
<1
<1
267
<1
56
<1
NA
<1
<1
<1
1510
<1
79
<0.05
2.1
IMW-3BC
06/16/2015
6.2
3.32
22
186
1.76
-12
193
3.15
84
11
<1
<1
258
<1
52
<1
NA
<1
<1
<1
994
<1
86
<0.05
1.21
IMW-3BC
1 12/06/2015
6.4
1.57
13
198
0.6
-43
162
4.16
83.6 M1
<100
<0.5
0.5
320
<0.2
51
<0.08
<0.03
<0.5
1.2
<1
9700
<0.1
1150
<0.2
0.65
IMW-3BC
01/13/2016
6.8
1.50
15
122
5.6
2
207
9.5
85
22
<1
<1
273
<1
58
<1
<0.03
<1
<1
<1
1800
<1
45
<0.05
<1
IMW-3BC
0310412016
6.8
L55
11
281
0.27
-65
140
41.6
99.1
31
<1
<1
298
<1
57
<1
1 <0.03
<1
1.31
<1
1 10900
<1
158
<0.05
<1
IMW-3BC
06/08/2016
6.5
1.86
20
224
0.3
-37
168
8.7
99.5
26
<1
<1
322
<1
55
<1
<0.03
<1
<1
<1
6250
<1
148
<0.05
<1
IMW-3BC
08/03/2016
6.5
2.63
24
228
0.37
31
236
1.27
100
21
<1
<1
343
<1
53
<1
1.7
<1
1.13
<1
11000
<1
144
<0.05
<1
Total Count of Valid Samples
1 39
37
39
39
39
39
39
39
39
29
39
39
39
39
39
38
39
39
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
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 ft - Feet umhos/cm - Micro mhos per centimeter Temp - Temperature NM - Not Measured
DUP = Duplicate NA = Not analyzed mg/L = Milligram per liter
S.U. = Standard Unit Deg C - Degrees Celsius mV - Millivolts
DO = Dissolved oxygen
ORP - Oxidation -Reduction Potential
NE = Not established
Eh = Redox Potential
= NC DHHS Health Screening Level.
< = Concentration not detected at or above the 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 10X 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.
CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits.
D3 = Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits.
j = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
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.
M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M3 = Matrix spike recovery was outside laboratory control limits due to matrix interferences.
M6 = Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution.
N1 - This sample was inadvertently collected with sample running through the flow cell and should be considered invalid based on possible contamination from the flow cell.
Rl - Reported value was outside control limits.
S - Associated calibration check did not meet specified criteria.
NTU = Nephelometric turbidity unit
ug/L = Microgram per liter
mg - N/L - Milligram nitrogen per liter
Prepared by: TCP Checked by: ]DM
P:\Duke Energy Progress. 1026\104. Lee Ash Basin GW Assessment\Background Summaries\Groundwater\HF Lee_BG Analytical thru 2016-09 Page 3 of 4

TABLE 1
BACKGROUND ANALYTICAL RESULTS THROUGH 2O16-09
H.F. LEE ENERGY COMPLEX
DUKE ENERGY PROGRESS, LLC, GOLDSBORO, NC
Analytical Parameter
Nickel
Potassium
Selenium
Sodium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Zinc
Radium-226
Radium-228
Uranium-233
Uranium-234
Uranium-236
Uranium-238
Reporting Units
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
mg/L
ug/L
ug/L
pCi/L
pCi/L
ug/mL
ug/mL
ug/mL
ug/mL
15A NCAC 02L Standard
100
NE
20
NE
NE
250
0.2*
Soo
0.3*
1000
NE
NE
NE
NE
NE
NE
Sample ID
Sample
Collection Date
Analytical Results
AMW-12BC
01/11/2016
1.98
0.701
<1
10.4
26
9.8
<0.2
65
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-12BC
03/01/2016
1.81
0.742
<1
10.5
24
11
<0.2
81
<0.3
<5
0.691
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-12BC
06/08/2016
2.1
0.776
<1
9.62
26
9.4
<0.2
54
<0.3
9
0.306
<1
<0.00005
<0.00005
<0.00005
0.00021
AMW-12BC
08/04/2016
2.21
0.782
<1
9.47
26
9.4
<0.2
71
<0.3
9
0.685
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-13BC
0310512015
2.21
2.48
<1
22.4
151
16
<0.2
200
0.962
8
NA
NA
NA
NA
NA
NA
AMW-13BC
06/10/2015
1.11
1.59
<1
15.8
125
5.7
<0.2
170
0.324
<5
NA
NA
NA
NA
NA
NA
AMW-13BC
12/04/2015
<1
1.57
<1
14.7
134
3.8
<0.2
170
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-13BC
01/11/2016
<1
1.46
<1
15.9
142
0.28
<0.2
170
<0.3
<5
NA
NA
NA
NA
NA
NA
AMW-13BC
03/01/2016
<1
1.47
<1
15
132
1
<0.2
160
<0.3
<5
0.959
<3
<0.00005
<0.00005
<0.00005
<0.0002
AMW-13BC
06/08/2016
<1
1.47
<1
14.2
125
5.9
<0.2
150
<0.3
<5
3.44
<1
<0.00005
<0.00005
<0.00005
0.000281
AMW-13BC
08/03/2016
<1
2.03
<1
14.4
126
5.6
<0.2
150
0.343
<5
1.59
<1
<0.00005
<0.00005
<0.00005
<0.0002
AMW-16BC
07/20/2016
37.5
2.06
<1
17.6
33
19
<0.2
120
3.2
23
3.1
<1
<0.00005
<0.00005
<0.00005
<0.0002
IMW-IBC
05/27/2015
2.68
2.22
<1
59.2
105
20
<0.2
220
<0.3
<5
NA
NA
NA
NA
NA
NA
IMW-1BC
06/12/2015
2.25
2.44
<1
62.5
113
20
<0.2
230
<0.3
7
NA
NA
NA
NA
NA
NA
IMW-1BC
09/24/2015
1.57
2.57
<1
62.9
120
NA
<0.2
NA
<0.3
<5
NA
NA
NA
NA
NA
NA
IMW-1BC
12/06/2015
0.9
<5
<0.5
61
110
15.8
<0.1
223
<1
<10
NA
NA
NA
NA
NA
NA
IMW-1BC
01/12/2016
1.39
2.4
<1
63
114
18
<0.2
240
<0.3
<5
NA
NA
NA
NA
NA
NA
IMW-IBC
03/04/2016
2.17
2.15
<1
72.1
97
23
<0.2
260
<0.3
<5
<1
2.5
<0.00005
<0.00005
<0.00005
0.000566
IMW-1BC
06/07/2016
<1
2.22
<1
68.3
104
22
<0.2
250
0.455
<5
0.784
<1
<0.00005
<0.00005
<0.00005
<0.0002
IMW-1BC
08/03/2016
1.21
2.43
<1
71.2
104
21
<0.2
240
0.332
<5
<1
<1
<0.00005
<0.00005
<0.00005
0.000203
IMW-2BC
0512612015
<1
3.95
<1
81.4
143
17
<0.2
280
0.429
<5
NA
NA
NA
NA
NA
NA
IMW-28C
0611212015
<1
3.85
<1
101
129
8.6
<0.2
350
0.629
<5
NA
NA
NA
NA
NA
NA
IMW-2BC
12/06/2015
<0.5
7.09
<0.5
92.7
150
<1
<0.1
267
<1
<10
NA
NA
NA
NA
NA
NA
IMW-2BC
01/13/2016
1.46
4.36
<1
119
133
5.1
<0.2
340
0.438
<5
NA
NA
NA
NA
NA
NA
IMW-2BC
03/03/2016
<1
3.34
<1
128
98
12
<0.2
370
0.637
<5
0.743
3.27
<0.00005
<0.00005
<0.00005
0.000395
IMW-28C
0610712016
<1
3.72
<1
117
117
9.2
<0.2
350
0.61
<5
0.337
<1
<0.00005
<0.00005
<0.00005
<0.0002
IMW-2BC
08/03/2016
<1
4.08
<1
104
128
8.5
<0.2
340
0.527
<5
<1
<1
<0.00005
<0.00005
<0.00005
0.000241
IMW-38C
0512712015
2.28
1.08
<1
7.39
83
5
<0.2
110
<0.3
6
NA
NA
NA
NA
NA
NA
IMW-3BC
06/16/2015
2.25
1.13
<1
7.46
76
4.6
<0.2
150
<0.3
7
NA
NA
NA
NA
NA
NA
IMW-3BC
12/06/2015
2.2
<5
<0.5
<5
81
2.7
<0.1
118 D6
<1
<10
NA
NA
NA
NA
NA
NA
IMW-3BC
01/13/2016
1.45
5.37
<1
6.54
85
3.4
<0.2
110
<0.3
7
NA
NA
NA
NA
NA
NA
IMW-3BC
0310412016
1.75
1.25
<1
15.5
86
4.2
<0.2
130
<0.3
9
1.43
<3
<0.00005
<0.00005
<0.00005
<0.0002
IMW-3BC
06/08/2016
2
1.18
<1
10.8
86
4.6
<0.2
110
<0.3
<5
<1
0.593
<0.00005
<0.00005
<0.00005
<0.0002
IMW-3BC
08/03/2016
2.19
1.13
<1
9.04
85
4.7
<0.2
110
<0.3
<5
1.17
1.34
<0.00005
<0.00005
<0.00005
<0.0002
Total Count of Valid Samples
39
39
39
39
39
37
39
37
39
39
18
18
18
18
18
18
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
old 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)
E:::�alue eliminated as outlier (through April 2016 analytical results)
Spec Cord = Specific Conductanc ft = Feet umhos/cm = Micro mhos per centimeter Temp = Temperature NM = Not Measured
DUP = Duplicate NA = Not analyzed mg/L = Milligram per liter DO = Dissolved oxygen NE = Not established
S.U. = Standard Unit Deg C = Degrees Celsius mV = Millivolts ORP = Oxidation -Reduction Potential Eh = Redox Potential
= NC DHHS Health Screening Level.
< = Concentration not detected at or above the 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 30X 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.
CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits.
D3 = Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits.
j = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
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.
M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M3 = Matrix spike recovery was outside laboratory control limits due to matrix interferences.
M6 = Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution.
N1 = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the Flow cell.
R1 = Reported value was outside control limits.
S = Associated calibration check did not meet specified criteria.
NTU = Nephelometric turbidity unit
ug/L = Microgram per liter
mg - N/L = Milligram nitrogen per liter
Prepared by: TCP Checked by: ]DM
P:\Duke Energy Progress. 1026\104. Lee Ash Basin GW Assessment\Background Summaries\Groundwater\HF Lee_BG Analytical thru 2016-09 Page 4 of 4

/� 1A
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FORMER DISCHARGE FOR INACTIVE
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B-7- BACKGROUND COMPLIANCE WELL
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(b IMW-01S ASSESSMENT WELL
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APPROXIMATE CREEK CHANNEL
— — DUKE ENERGY PROGRESS
500 ft COMPLIANCE BOUNDARY
WASTE BOUNDARY
— PARCEL LINES
GRAPHIC SCALE
250 0 250 500
IN FEET
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
DRAWN BY'A. FEIGL DATE: 11/18/2016
PRWECTMANAGER:J. MAHAN
CHECKED BY: C. PONCE
SOURCES:
NOVEMBER 21, 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM GOOGLE EARTH
LAY OF THE LAND AREA (LOLA) WAS BASED ON THE AUGUST 26, 2014
LETTER REPORT -STAGE I WORK BY GEOSYNTEC CONSULTANTS.
PARCEL BOUNDARY WAS OBTAINED FROM WAYNE COUNTY GIS DATA AT
http://www.waynegov.com/ page/214
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM PIPS 3200 (NAD 83).
ANY WETLANDS SHOWEN WERE DELINEATED BY AMEC FOSTER WHEELER OF
CHARLOTTE. NC ON JUNE 12014
FIGURE 1
WELL LOCATION MAP - INACTIVE BASIN
DUKE ENERGY PROGRESS
H. F. LEE ENERGY COMPLEX
GOLDSBORO, NORTH CAROLINA
7

AMW-125 AMW-12BC
AMW-136C
® AMW-13S
AMW-7CBC _
BGMW-9
0
� AMW-098C
PZ-111
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ILAY OF LAND AREA (LOLA)
LLMW-02S '
LLMW Ol
LLMW-OIS
LLMW-03
e'I -
BER 21, 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM GOGGLE EARTH
THE LAND AREA (LOLA) WAS BASED ON THE AUGUST 26, 2014
REPORT -STAGE I WORK BY GEOSYNTEC CONSULTANTS.
- BOUNDARY WAS OBTAINED FROM WAYNE COUNTY GIS DATA AT
vww.waynegov.com/page/214
IG HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
LEGEND
BGMW-10 BACKGROUND COMPLIANCE WELL
CMW-5 DOWNGRADIENT COMPLIANCE WELL
AMW-14S ASSESSMENT WELL
(a FPT-2-1 MONITORING WELL OR PIEZOMETER
�- APPROXIMATE CREEK CHANNEL
DUKE ENERGY HF LEE PLANT BOUNDARY
500 ft COMPLIANCE BOUNDARY
WASTE BOUNDARY
-
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t
®AMW-15S
AMW 15BC
♦
ACTIVE ASH BASIN CMW-6
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AMW-6RBC
e AMW-18S
AMW-188C
♦
pOp,
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GRAPHIC SCALE
250 0 250 500
IN FEET
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
DRAWN BY: A. FEIGL DATE: 11/18/2016
PROJECT MANAGER: J. MAHAN
CHECKED BY: C. PONCE
FIGURE 2
WELL LOCATION MAP - ACTIVE BASIN
DUKE ENERGY PROGRESS
H. F. LEE ENERGY COMPLEX
GOLDSBORO, NORTH CAROLINA