Coal Pile Assessment Concurrence Request_20191011

DUKE
ENERGY
October 11, 2019
North Carolina Department of Environmental Quality
Division of Water Resources
1636 Mail Service Center
Raleigh, North Carolina 27699-1636
Attn: Mr. Steve Lanter (submitted electronically)
Re: Coal Storage Pile Area - Assessment Clarification
Mayo Steam Electric Plant
10660 Boston Road
Roxboro, North Carolina 27574
Dear Mr. Lanter,
2500 Fairfax Road
Greensboro, NC 27407
[phone]
As previously discussed, additional data was needed to determine if the Duke Energy Mayo Steam
Electric Plant Mayo Coal Storage Pile Area (CSPA) could be assessed as a potential source independent
of the CCR surface impoundment.
Attached you will find a Technical Memorandum, prepared by SynTerra on behalf of Duke Energy,
summarizing CSPA assessment activities to date in addition to evaluation of the data to determine if the
CSPA can be assessed as a standalone potential primary source.
Duke Energy is requesting concurrence for submittal of separate reports for the Mayo CSPA assessment
and Updated CAP. Both reports will be submitted to NCDEQ DWR no later than March 31, 2020.
If you need additional information regarding this request do not hesitate to call or email me at 336-215-
4576 or [e-mail].
Sincerely,
Kimberlee Witt, M.E., P.E.
Senior Engineer
Duke Energy Environmental
Attachments: Mayo Steam Electric Plant — Coal Storage Pile Area Assessment Clarification
(SynTerra 10/10/2019)
cc: Eric Smith, NCDEQ
Eric Rice, NCDEQ
Rick Bolich, NCDEQ
NCDEQ Coal Ash eMail
Scott Davies, Duke Energy
John Toepfer, Duke Energy
Ed Sullivan — Duke Energy
Page 1 of 1

161P
synTerra TECHNICAL MEMORANDUM
Date: October 11, 2019 File:1026.105
To: Kimberlee Witt (Duke Energy)
Cc: John Toepfer (Duke Energy)
From: Jerry Wylie
Subject: Mayo Steam Elec ?icPlant - Coal Storage Pile Area Assessment Clarification
SynTerra Corporation has reviewed available historic operational information and site
assessment data concerning the Mayo Steam Electric Plant (Mayo or Plant) coal storage pile area
(CSPA) to evaluate the nature of the CSPA as it relates to the Plant's CCR surface impoundment
for determining the timeliest and technically appropriate approach to completing assessment.
The CSPA is located south of the surface impoundment at Mayo in Person County, Roxboro,
North Carolina.
This review was conducted by Jerry Wylie, a licensed professional geologist in North Carolina,
who is a Principal and Senior Geologist at SynTerra.
INTRODUCTION
The Mayo Corrective Action Plan (CAP) for the CCR surface impoundment, currently in an
advanced stage of preparation, addresses the requirements of Section 130A-309.211 (b) (1) of the
North Carolina Coal Ash Management Act (LAMA). Constituent concentrations greater than
02L/IMAC/background values in groundwater, associated with the Mayo CCR surface
impoundment, are present within the compliance boundary north of the CCR surface
impoundment between the impoundment dam and Mayo Lake Road.
The Mayo coal pile occupies approximately 30 acres in the south-central portion of the Plant
(Figure 1). Surface water runoff from the coal pile was historically directed to the CCR surface
impoundment; however, a lined coal pile retention basin and conveyance structures were
constructed in 2018 to capture industrial stormwater and direct it to new wastewater treatment
facilities. The CSPA includes the coal pile, conveyance structures, and retention basin. The
CSPA is bounded to the north by internal Plant access roads and railroad lines and to the east
by internal Plant access roads and buildings. West and south of the CSPA is mostly
undeveloped, forested land. The land surface surrounding the CSPA is generally flat.

Mayo — Coal Storage Pile Area Assessment Clarification October 11, 2019
Duke Energy — Mayo Steam Electric Plant (Roxboro, NC) Page 2 of 3
COAL STORAGE PILE AREA PRELIMINARY FINDINGS
Initial assessment activities associated with the Mayo CSPA were conducted in the first half of
2019 as described in a CSPA Assessment Work Plan (submitted January 24, 2019; approved
February 14, 2019; then revised, February 20, 2019; approved, March 6, 2019). Assessment
results indicate:
• The CSPA is approximately 350 feet south of the CCR surface impoundment (Figure 1).
• The CSPA is not a CCR surface impoundment as defined by LAMA.
• No groundwater or surface water receptors are located downgradient of the CSPA.
• Thirteen (13) groundwater monitoring wells and piezometers surrounding the CSPA
have been installed (Figure 1).
• One site -wide water level sweep was conducted including CSPA wells. Primary
groundwater flow direction from the CSPA is mostly radial predominated by flow to the
northwest and west in the transition zone and bedrock flow zones (Figure 2A and
Figure 2B).
• Three groundwater CAMA constituent analytical sample events have been completed
for the CSPA assessment monitoring well network. Analytical results have been
included on the CAMA Quarterly Data submittals to NCDEQ in addition to Table 1.
• A few metals (e.g., lead, nickel, zinc), as well as low pH conditions, are detected at
relatively high concentrations in CSPA assessment well CPA-71), distinct from Mayo
CCR surface impoundment groundwater monitoring wells, indicating the high
concentrations associated with CPA-7D and other CSPA wells is anomalous to the
CSPA. Potential groundwater impact is localized to this portion of the CSPA. Additional
information is needed for a complete evaluation of this area. A Work Plan for Additional
Assessment of the CSPA was submitted to NCDEQ-Raleigh Regional Office (RRO) on
912412019; NCDEQ approval/comment is pending.
CSPA assessment wells located on the east side of the CSPA, CPA-4D (the only well
successfully installed at this cluster location) and monitoring well cluster CPA-5, were
originally presumed to be upgradient of the CSPA and CCR surface impoundment;
however, analytical results to date for these wells, show elevated concentrations of a few
metals and inorganics potentially indicating a source other than the CSPA or CCR
surface impoundment. Additional assessment is needed to identify if there is a separate
source in this area. A Work Plan for Additional Assessment of the CSPA was submitted to
NCDEQ- RRO on 912412019; NCDEQ approval/comment is pending.
The relative contribution of groundwater flowing into the CCR surface impoundment
watershed from the CSPA is negligible. The assimilative capacity of the CCR surface
impoundment system (impoundment and groundwater beneath the impoundment) far
exceeds the volume of groundwater flow towards the CCR surface impoundment
watershed from the south/southwest which includes the CSPA. The CSPA accounts for

Mayo — Coal Storage Pile Area Assessment Clarification October 11, 2019
Duke Energy — Mayo Steam Electric Plant (Roxboro, NC) Page 3 of 3
approximately 6% of the entire watershed area and would flow towards the uppermost
portion of the CCR surface impoundment (furthest upgradient and furthest distance
away from the area between the impoundment dam and Mayo Lake Road).
Contribution of groundwater from the CSPA has no measurable effect on groundwater
beneath or downgradient (impoundment dam, downgradient of the impoundment dam,
Crutchfield Branch area) of the CCR surface impoundment. This conclusion is based on
the occurrence and comparative concentration of certain metals and inorganics in
ABMW-04, the closest CAMA groundwater monitoring well cluster downgradient of the
CSPA (Figure 1). The ABMW-04 cluster consists of three wells within the CCR surface
impoundment waste boundary screened in pore water (ABMW-04X), transition zone
(ABMW-04D), and bedrock (ABMW-04BR). The ABMW-04 cluster analytical results
were compared to results from upgradient CSPA wells CPA-01D/BR and CPA-07D
(Table 1). Further, analytical data were plotted on a Piper diagram (Figure 3) which
shows the geochemical signatures of groundwater from beneath the CSPA and CCR
surface impoundment are different, indicating unique sources for the inorganic
constituents in the two areas.
RECOMMENDATION
Based on the information presented in this technical memo, the CSPA at Mayo should be
evaluated as a standalone potential primary source. Assessment of the CSPA is not yet
complete; additional field data and evaluation is needed to determine the nature and extent of
potential impact associated with the CSPA (as defined in the Work Plan for Additional Assessment
of the CSPA submitted to NCDEQ-RRO on 9/24/2019). Inclusion of the CSPA assessment in the
LAMA -required evaluation of corrective action for the Mayo CCR surface impoundment would
unnecessarily prolong timely completion of the CAP. The Mayo CAP is in advanced stage of
preparation; assessment and data evaluation is complete. No additional information or data is
needed to provide a technically defensible recommendation related to corrective action for the
Mayo CCR surface impoundment. Findings to date and new data derived from additional
assessment of the CSPA will not alter the recommendations for, nor will they provide clarity to,
the evaluation of corrective action associated with the Mayo CCR surface impoundment. A
separate CSPA assessment report and CCR surface impoundment CAP provide clarity for the
respective unit findings and recommendations rather than adding confusion.
ATTACHMENTS:
Figure 1 Site Plan
Figure 2a Preliminary Water Level Map — Transition Zone
Figure 2b Preliminary Water Level Map — Bedrock
Figure 3 Water Quality Piper Diagram
Table 1 Analytical Data for CPA-01D/BR, CPA-07D, AND ABMW-04/X/D/BR
(January 2018 — Present)

.� AB MVV-4 WE ,,$ , J �; 0,
LOCAT�ON-.A - 1. s'
1500 FEET NOR T "O' T' r'
.(�— ~_ (• F APPROXIMATE FUTURE
♦ y? _ • W' ASH BASIN WASTE BOUNDARY
z".1",
(SEE NOTE 2)
%'�
COAL PILE
RETENTION
BASIN
F
CPA-6BR �
I
s4*
.♦ �� �� �,.,, ems' `• '�`�-
/
d
Ilk
AL
AGE
LE
EA
rr r
a/ • ��. �- �, „�/ate^/r.`, �•• 4
I
s� CPA-12
• i
i� DUKE
PROGRESSENERGY
.4
w}
LEGEND
PROPOSED SOIL BORING LOCATION
(APPROXIMATE)
PROPOSED CSPA MONITORING WELL LOCATION
2 (APPROXIMATE)
EXISTING CSPA MONITORING WELLAND SOIL
BORING LOCATION
• APPROXIMATE ASH BASIN WASTE BOUNDARY
- - - - - ASH BASIN COMPLIANCE BOUNDARY
a NOTES:
1. COAL PILE DRAINAGE SYSTEM CONSTRUCTION FEATURES PROVIDED BY DUKE
k.a - ENERGY PROGRESS.
II - 2. AREA OF INVESTIGATION THAT DETERMINED SETTLED CCR MATERIAL IS NOT
PRESENT IN THIS AREA OF THE ASH BASIN. A FUTURE REPRESENTATIVE ASH BASIN
WASTE AND COMPLIANCE BOUNDARY IS INCLUDED IN THE MAYO NPDES PERMIT
NC0038377 PART I, 5.A.(18.) ATTACHMENT FIGURE 1 AND ATTACHMENT B FIGURE 1.1
DATED JULY 13, 2018.
3. PROPOSED SOIL BORINGS AND MONITORING WELL LOCATIONS INCLUDED IN THE
WORK PLAN FOR ADDITIONAL ASSESSMENT, SUBMITTED SEPTEMBER 24, 2019.
4. WSP SURVEY CONDUCTED APRIL 17, 2014.
5. FLOOD INSURANCE BOUNDARIES PROVIDED BY FEMA, PERSON COUNTY FLOOD
INSURANCE STUDY, EFFECTIVE NOVEMBER 17, 2017 (https://msc.fema.gov/portal).
6AERIAL PHOTOGRAPHY OBTAINED FROM PERSON COUNTY GIS ON SEPTEMBER 13,
2619. IMAGE COLLECTED IN 2019.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
GRAPHIC SCALE FIGURE 1
100 0 100 200
SITE PLAN
(IN FEET) ASSESSMENT CLARIFICATION
DRAWN BY: A. ROBINSON DATE: 05/03/2019 COAL STORAGE PILE AREA
REVISED BY: C. DAVIS DATE: 10/10/2019
CHECKED BY: P. ALTMAN DATE: 10/10/2019 MAYO STEAM ELECTRIC PLANT
APPROVPROJECT
MAN GER:JE DATE: 10/10/2019 PERSON COUNTY, ROXBORO, NORTH CAROLINA
PROJECT MANAGER: J. WYLIE
W Ww.svnte rracorD.COM

3 `
Nt
APPROXIMATE FUTURE
' ASH BASIN WASTE BOUNDARY • l ♦' -• ' .d
• (SEE NOTE 2) ♦,♦ i �� `�i
00,
FcPA ♦a�t��
f .Y`
' s ' 503.51 .` g
� fk". '.F's %' '-.. 'lam • �/ iJ� a
y o,.
CPA-1D, to ♦� + ''s!', ;:�; �,
1492.12
--C--OA4L
/
AREA
m 8 sm r '
..
f ♦.
3 -2D ' / / l �t a;Q4 Air_ A
19.45
401
LEGEND
/ / MONITORING WELL
/ ,�^ / ---- INFERRED WATER LEVEL CONTOUR (NAVD 88)
'v � �+
ASH BASIN WASTE BOUNDARY
_ - — - APPROXIMATE ASH BASIN COMPLIANCE BOUNDARY
/
*401
NOTES:
1. COAL PILE DRAINAGE SYSTEM CONSTRUCTION FEATURES PROVIDED BY DUKE
0-0*'
CPA-3D
511.4
/
4
Iy^ -' " ' " "•'
/ CPA-46
/ 517.72
-
ENERGY PROGRESS.
2. AREA OF INVESTIGATION THAT DETERMINED SETTLED CCR MATERIAL IS NOT
PRESENT IN THIS AREA OF THE ASH BASIN. A FUTURE REPRESENTATIVE ASH BASIN
WASTE AD ERMIT
NCO 38377 PART�1,, 5I A (98.) AOTTACHME T A FIGURE 1 AND ATTACE BUNDARY IS INCLUDED IN THE AYOHMENT BNPIDES FIGURE 1.1
DATED JULY 13, 2018.
3. ADDITIONAL SITE WELL DATA USED TO DEVELOP POTENTIOMETRIC LINES.
4. AERIAL PHOTOGRAPHY OBTAINED FROM ESRI ONLINE ON SEPTEMBER 27, 2018.
IMAGE COLLECTED ON FEBRUARY 2, 2017.
5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
DUKE
��
GRAPHIC SCALE
100 0 100 200
FIGURE 2A
PRELIMINARY WATER LEVEL MAP
ENERGY
(IN FEET)
TRANSITION ZONE
PROGRESS
DRAWN BY: A. ROBINSON DATE:05/17/2019
ASSESSMENT CLARIFICATION
REVISED BY: C. DAVIS DATE: 10/09/2019
COAL STORAGE PILE AREA
141p
CHECKED BY: P. ALTMAN DATE: 10/09/2019
APPROVED BY: J. WYLIE DATE: 10/09/2019
MAYO STEAM ELECTRIC PLANT
synTerra
PROJECT MANAGER: J. WYLIE
PERSON COUNTY, ROXBORO, NORTH CAROLINA
www.svnterracorD.COM

0
4*
APPROXIMATE FUTURE
♦ ASH BASIN WASTE BOUNDARY
(SEE NOTE 2)
JV
CPA-1
493.62
lk
000, p
CPA-6BR
508.65
CPA-7BR 0000
.1
or
51
.1 Ink,
T
iv
PA-513R,
518.87
LEGEND
00, MONITORING WELL
1 /4% INFERRED WATER LEVEL CONTOUR (NAVD 88)
I.ASH BASIN WASTE BOUNDARY
APPROXIMATE ASH BASIN COMPLIANCE BOUNDARY
NOTES:
1. COAL PILE DRAINAGE SYSTEM CONSTRUCTION FEATURES PROVIDED BY DUKE
ENERGY PROGRESS.
2. AREA OF INVESTIGATION THAT DETERMINED SETTLED CCR MATERIAL IS NOT
PRESENT IN THIS AREA THE ASH A FUTURE ASH
WASTE AND COMPLIANCEOF BOUNDARYBASIN. INIS CLUDED INREPRESENTATIVE THE MAYO NPIDES PERMIT IN
IT
NCO038377 PART 1, 5.A.(18.) ATTACHMENT A FIGURE 1 AND ATTACHMENT B FIGURE 1.1
DATED JULY 13,2018
CPA R 3. ADDITIONAL SITE WELL DATA USED TO DEVELOP POTENTIOMETRIC LINES.
4. AERIAL PHOTOGRAPHY OBTAINED FROM ESRI ONLINE ON SEPTEMBER 27,2018.
509. 3 IMAGE COLLECTED ON FEBRUARY 2,2017.
5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
GRAPHIC SCALE FIGURE 2B
*�DUKE 100 0 100 200 PRELIMINARY WATER LEVEL MAP
ENERGY (IN FEET) BEDROCK ZONE
PROGRESS DRAWN BY:A. ROBINSON DATE: 05/17/2019 ASSESSMENT CLARIFICATION
REVISED BY: P. ALTMAN DATE: 10/09/2019 COAL STORAGE PILE AREA
CHECKED BY: P. A -MAN DATE: 10/09/2019
APPROVED BY: J. WYLIE DATE: 10/09/2019 MAYO STEAM ELECTRIC PLANT
synTerra PROJECT MANAGER: J. WYLIE PERSON COUNTY, ROXBORO, NORTH CAROLINA
www.svnterracorD.COM

Legend
■ ABMW-04D
• ABMW-04X
A CPA-01D
I
60%
20%
10o (0a spa
0 0 0
�— Ca
Notes:
1. CPA-07D is not included in this piper diagram because the charge
balance error was greater than ±10%. Based on analytical results,
the concentration of major anions and cations in CPA-7D are
similar to CPA-11D. Therefore, it is expected that CPA-7D would
plot similarly to CPA-I.D.
2. Data used to plot the wells comes from the most recent sample
results that have a charge balance error less than t10%: AMBW-
04D (April 2019), ABMW-04X (July 2019), and CPA-01D (August
2019).
( .DUKE
ENERGY
1'
synTerra
80% R
60% 0o
a
40%\
4\0 00 r e
Cl ---p.
DRAWN BY: R. BADUM
REVISED BY: P. ALTMAN
CHECKED BY: P. ALTMAN
APPROVED BY: J. WYLIE
PROJECT MANAGER: J. WYLIE
DATE: 10/9/2019
www.synterracorp.com
FIGURE 3
WATER QUALITY PIPER DIAGRAM
COAL PILE STORAGE AREA
ASSESSMENT CLARIFICATION
MAYO STEAM ELECTRIC PLANT
PERSON COUNTY, ROXBORO, NC

TABLE 1
ANALYTICAL DATA FOR CPA-01D/BR, CPA-07D, AND ABMW-04/X/D/BR (JANUARY 2018 - PRESENT)
ASSESSMENT CLARIFICATION
COAL PILE STORAGE AREA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, PERSON COUNTY, ROXBORO, NC
Analytical Parameter
pH
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Reporting Units
S.U.
pg/L
mg/L
mg/L
pg/L
mg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
700
NE
250
NE
250
500
NE
1*
10
700
4*
2
10
10
1*
1000
Provisional Background Threshold Values (Transition Zone Unit)
5.7-6.51
50
59.2
33.3
1 391
1 7.5
1 430
1 490
1 1
1 1
1 78.3
1
1
1.26
6
1
5
Provisional Background Threshold Values (Bedrock Unit)
5.0-7.31
50
73.3
43
418
18
340
536
1
1
1 97
1
1
0.4
7
1.19
5
Sample ID
Associated
Unit
Sample
Location
Aquifer Name
Top of
Well Screen
Elevation
(FEET)
Bottom of
Well Screen
Elevation
(FEET)
Latitude
Longitude
Sample
Collection
Date
Analytical Results
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
04/03/2019
6.3
40.976 j
92.3
210
993
890
1700
11
<1
<1
140
<1
<1
<0.025
0.467 j
43.9
<1
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
06/11/2019
6.6
54
147
110
1010
580
1200
350
<1
1.26
61
<1
<1
<0.025
0.897 j
48.8
0.577 j
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
08/13/2019
6.6
57
157
110
1090
530
1200
40
<1
1.86
50
<1
<1
0.078
<1
46.5
<1
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
04/03/2019
5.8
69
253
300
1570
1400
2500
139
<1
0.76 j
31
0.426 j
0.614 j
<0.025
0.431 j
254
1.3
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
06/11/2019
5.8
91
249
310
1600
1400
2500
91
<1
0.882 j
32
0.34 j
0.425 j
<0.025
0.782 j
283
1.07
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
08/13/2019
5.7
93
242
250
1560
1200
2620
99
<1
0.799 j
34
<1
0.34 j
<0.025 P4,R0
0.614 j
287
0.392 j
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
04/03/2019
7.1
<50
75.3
18
410
13
350
91
<1
<1
85
<1
<1
0.13
<1
0.553 j
<1
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
06/11/2019
7.1
<50
82.5
17
429
11
360
119
<1
0.789 j
66
<1
<1
0.059
0.455 j
0.492 j
0.606 j
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
08/12/2019
7.2
<50
78.5
15
399
8.5
300
239
<1
0.552 j
60
<1
<1
<0.05 D3
0.505 j
0.488 j
<1
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
04/09/2019
6.9
<50
90.1
33
355
49
490
283
0.341 j
<1
86
<1
<1
0.076
0.864 j
2.52
0.387 j
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
06/11/2019
7.2
34.755 j
72.8
31
298
53
500
74
0.384 j
0.652 j
66
<1
<1
0.036
0.618 j
1
1.31
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
08/12/2019
7.4
22.284 j
66.4
28
289
52
457
155
<1
0.35 j
65
<1
<1
0.28
0.868 j
0.84 j
0.334 j
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
04/03/2019
7.4
<50
44.9
6.4
154
8.6
200
65
<1
0.403 j
13
<1
<1
0.077
0.837 j
0.379 j
<1
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
06/11/2019
7.5
<50
47.2
6.5
154
12
240
270
<1
1.5
15
<1
<1
0.034
4.11
0.335 j
<1
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
08/12/2019
7.7
<50
45.6
6.4
149
14
213
32
<1
1.76
14
<1
<1
0.29
0.615 j
<1
<1
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
04/03/2019
6.5
48.296 j
81
34
407
190
480
46
<1
<1
55
<1
<1
0.12
<1
0.9661
0.81 j
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
06/11/2019
6.3
88
134
36
691
510
750
37
<1
<1
86
<1
0.879 j
0.062
0.658 j
0.437 j
0.961 j
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
08/13/2019
6.1
136
174
77
896
500
769
11
<1
0.457 j
106
<1
<1
<0.025 P4,R0
0.543 j
0.589 j
0.658 j
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
04/04/2019
10.5
38.558 j
296
68
1880
800
1400
149
<1
0.37 j
130
<1
1.55
0.6 S1
1.94
19.1
3.08
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
06/11/2019
7.3
83
382 M4
91
2320
1300
2000
1120
<1
0.752 j
80
1.8
3.11
0.19
2.49
58.3
17.9
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
08/13/2019
8.8
80
345
77
2650
870
1990
1280
<1
1.06
104
2.65
4.13
<0.025
1.66
94.4
13.8
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
04/04/2019
7.5
<50
56.2
6.6
271
58
300
46
<1
0.432 j
24
<1
<1
<0.025
0.367 j
<1
<1
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
06/10/2019
7.5
<50
52.8 M2
6.4
266
62
280
66
0.481 j
1.75
28
<1
<1
0.085
0.577 j
<1
<1
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
08/12/2019
7.3
<50
54.3
6.3
266
53
279
14
<1
2.75
26
<1
<1
0.19
0.482 j
<1
<1
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
04/04/2019
7.0
55
46.2
19
267
24
300
159
<1
0.46 j
71
<1
<1
<0.025
0.817 j
3.92
0.9571
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
06/10/2019
11.2
38.8111
28.9
18
421
21
230
1120
<1
0.656 j
32
<1
<1
0.27
0.678 j
<1
1.17
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
08/12/2019
11.4
34.308 j
52.2
17
705
17
264
1320
<1
0.754 j
57
<1
<1
0.23
0.515 j
<1
0.746 j
CPA-05S
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
04/09/2019
6.4
197
25.5
29
327
22
280
113
<1
<1
152
<1
<1
<0.025
0.552 j
3.67
<1
CPA-05S
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
06/10/2019
6.4
176
26.1
26
328
48
300
315
<1
<1
163
<1
<1
0.12
1.13
5.02
1.01
CPA-05S
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
08/12/2019
6.3
169
26.9
39
348
38
298
84
<1
<1
163
<1
<1
0.18 P4,R0
0.985 j
4.7
<1
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
-78.89769187
04/08/2019
3.9
559
474
470
4010
5000
5200
48000
<1
104
35
31.5
31.5
<0.025 P4,R0
1.36
904
233
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
-78.89769187
06/10/2019
3.8
653
487
550
3970
3100
4900
45500
<1
94.3
23
29.3
28.9
0.21
1.67
965
255
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
78.89769187
08/13/2019
3.4
705
473
380
3870
2700
4960
45500
<10
138
20
40.6
31
<0.025 P4,R0
2.291 j
989
245
Page 1 of 4

TABLE 1
ANALYTICAL DATA FOR CPA-01D/BR, CPA-07D, AND ABMW-04/X/D/BR (JANUARY 2018 - PRESENT)
ASSESSMENT CLARIFICATION
COAL PILE STORAGE AREA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, PERSON COUNTY, ROXBORO, NC
Analytical Parameter
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
Nitrate +
Nitrite
Potassium
Selenium
Sodium
Thallium
Vanadium
Zinc
Reporting Units
pg/L
Ng/L
Ng/L
mg/L
Ng/L
Ng/L
pg/L
pg/L
mg-N/L
mg/L
Ng/L
mg/L
pg/L
pg/L
Ng/L
15A NCAC 02L Standard
300
15
NE
NE
50
1
NE
100
NE
NE
20
NE
0.2*
0.3*
1000
Provisional Background Threshold Values (Transition Zone Unit)
1319
1
NE
1 13.5
1 298
0.2
1
1 5
1 0.295
1 3.61
1 1
1 53.3
1 0.2
1 5.88
12
Provisional Background Threshold Values (Bedrock Unit)
2550
1
NE
13.1
544
0.05
13.1
5
1.03
6.56
1
72.6
0.2
5.52
37.9
Sample ID
Associated
Unit
Sample
Location
Aquifer Name
Top of
Well Screen
Elevation
(FEET)
Bottom of
Well Screen
Elevation
(FEET)
Latitude
Longitude
Sample
Collection
Date
Analytical Results
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
04/03/2019
2020
<1
376
70.7
13500
<0.05
87.6
22.6
0.0053 j
250
26.3
160
0.118 j
0.128 j
13
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
06/11/2019
9960
0.417 j
27
65.9
24200
<0.05
9.14
18.8
0.039
35.2
0.423 j
115
<0.2
0.615
4.981 j
CPA-01BR
Coal Pile Area
Bedrock
451.01
441.01
36.52689328
-78.89890564
08/13/2019
7150
<1
54 S1
69
23900
<0.05
14.9
18.3
0.023
47.6
0.66 j
132
<0.2
0.117 j
25
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
04/03/2019
18800
<1
4.424 j
168
66000
<0.05
0.813 j
154
0.044
5.59
0.545 j
224
<0.2
0.448
67
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
06/11/2019
22000
<1
2.349 j
173
66900
<0.05
0.295 j
168
0.055
5.4
0.376 j
220
<0.2
0.482
72
CPA-01D
Coal Pile Area
Transition Zone
486.39
476.39
36.52691771
-78.89886084
08/13/2019
22200
<1
9 sl
167
65000
<0.05
0.304 j
163
0.052 M2
5.58
0.371 j
220
<0.2
0.494
63
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
04/03/2019
144
<1
2.769 j
10.6
791
<0.05
6.64
0.982 j
0.0089 j
4.31
<1
30.3
<0.2
0.632
<5
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
06/11/2019
381
<1
2.127 j
11.6
970
<0.05
6.13
2.15
0.0065 j
4.86
<1
24.4
<0.2
0.42
3.659 j
CPA-02BR
Coal Pile Area
Bedrock
471.59
461.59
36.52584514
-78.89947077
08/12/2019
531
<1
1.701 j
11
928
<0.05
4.8
<1
<0.01
4.56
<1
23.2
<0.2
0.338
3.701 j,B2
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
04/09/2019
248
<1
<5
25.7
3890
<0.05
25.1
1.56
0.011
5.98
0.497 j
48.2 B2
<0.2
1.08
<5
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
06/11/2019
363
<1
<5
21.9
3950
<0.05
91.5
3.06
0.008 j
5.64
<1
85.6
<0.2
0.885
6
CPA-02D
Coal Pile Area
Transition Zone
497.18
487.18
36.52586782
-78.89946930
08/12/2019
401
<1
4.158 j
21.2
3490
<0.05
46.5
0.668 j
0.015
7.62
<1
68.9
<0.2
0.712
3.573 j,B2
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
04/03/2019
117
<1
3.243 j
7.55
397
<0.05
2.25
0.546 j
<0.01
7.84
<1
10.8
<0.2
0.742
<5
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
06/11/2019
581
<1
<5
8.04
381
<0.05
8.69
2.04
0.0082 j,M2
9.54
<1
13.8
<0.2
1.31
3.568 j
CPA-03BR
Coal Pile Area
Bedrock
443.04
433.04
36.52437185
-78.89863944
08/12/2019
319
<1
<5
7.41
361
<0.05
10.6
0.536 j
0.0084 j
9.06
<1
15.2
<0.2
0.187 j
3.214 j,B2
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
04/03/2019
88
<1
5
24.7
1170
<0.05
1.86
18.7
0.0039 j
5.64
<1
22.5
<0.2
0.604
5
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
06/11/2019
183
<1
6
43.2
1890
0.026 j
2.65
37.8
0.773
8.18
<1
28.8
<0.2
0.605
10
CPA-03D
Coal Pile Area
Transition Zone
503.02
493.02
36.52435164
-78.89861491
08/13/2019
340
<1
12 S1
56.8
4510
<0.05
2.62
56.6
0.0055 j
8.96
<1
39.3
<0.2
0.251 j
16
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
04/04/2019
135
<1
48
37.5
6590
<0.05
17.9 S1
56.8
0.023
29.4
1.97
69.4
<0.2
2.86
57
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
06/11/2019
1020
<1
87
79.8
19100
<0.05
12.5
148
0.01
27.5
0.685 j
85.6 M1
<0.2
1.35
341
CPA-04D
Coal Pile Area
Transition Zone
511.49
501.49
36.52422413
-78.89538803
08/13/2019
1910
<1
107
65.8
18700
<0.05
11.9
231
0.02
36.4
0.812 j
88.8
<0.2
1.88
569
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
04/04/2019
106
<1
3.527 j
8.08
341
<0.05
2.73 S1
<1
<0.01
8.48
<1
11.6
<0.2
0.659
<5
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
06/10/2019
318
<1
7
8.02
374
<0.05
9.28
1.29
0.004 j
12.1
<1
12.7
<0.2
0.357
2.077 j
CPA-05BR
Coal Pile Area
Bedrock
446.60
431.60
36.52605198
-78.89402342
08/12/2019
331
<1
4.563 j
7.96
327
<0.05
9.51
<1
<0.01
12.4
<1
13.1
<0.2
0.255 j
4.659 j,B2
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
04/04/2019
949
<1
25
7.95
6380
<0.05
5.7 S1
4.43
0.0035 j
15.3
0.417 j
23.1
<0.2
1.76
<5
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
06/10/2019
164
<1
57
0.564
57
<0.05
16.5
0.688 j
0.007 j
27.7
0.565 j
25.2
<0.2
6.09
<5
CPA-05D
Coal Pile Area
Transition Zone
482.13
472.13
36.52603151
-78.89403705
08/12/2019
66
<1
63
0.351
11
<0.05
18.6
0.388 j
<0.01
24.6
0.399 j
24.8
<0.2
5.53
3.111 j,B2
CPA-05S
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
04/09/2019
2180
<1
<5
17.9
15900
<0.05
4.36
1.12
0.019
6.29
<1
38.1 B2
<0.2
0.34
<5
CPA-05S
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
06/10/2019
8780
<1
7
17.8
15100
<0.05
6.23
4.62
0.047
5.28
<1
30.4
<0.2
0.256 j
3.092 j
CPA-05s
Coal Pile Area
Saprolite
512.12
497.12
36.52604870
-78.89405357
08/12/2019
8610
<1
3.043 j
17.3
15100
<0.05
3.21
4.71
0.045 M2
5.37
<1
29.8
<0.2
0.14 j
4.475 j,B2
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
-78.89769187
04/08/2019
14200
27.4
60
220
187000
0.15
<1
686
1.3
15.6
29.1
439
0.296
<0.3
1880
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
-78.89769187
06/10/2019
28200
29.3
122
220
180000
0.1
0.316 j
681
0.691
15
23.7
420
0.278
0.221 j
1860
CPA-07D
Coal Pile Area
Transition Zone
495.86
485.86
36.52755149
-78.89769187
08/13/2019
16300
30.9
83
225
191000
0.09
0.291 j
707
0.609
16.2
75.6
452
0.479 j
0.373 j
1890
Page 2 of 4

TABLE 1
ANALYTICAL DATA FOR CPA-01D/BR, CPA-07D, AND ABMW-04/X/D/BR (JANUARY 2018 - PRESENT)
ASSESSMENT CLARIFICATION
COAL PILE STORAGE AREA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, PERSON COUNTY, ROXBORO, NC
Analytical Parameter
pH
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Reporting Units
S.U.
pg/L
mg/L
mg/L
pg/L
mg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
700
NE
250
NE
250
500
NE
1*
10
700
4*
2
10
10
1*
1000
Provisional Background Threshold Values (Transition Zone Unit)
5.7-6.51
50
59.2
33.3
1 391
1 7.5
1 430
1 490
1 1
1 1
1 78.3
1
1
1.26
6
1
5
Provisional Background Threshold Values (Bedrock Unit)
5.0-7.31
50
73.3
43
418
18
340
536
1
1
1 97
1
1
0.4
7
1.19
5
Sample ID
Associated
Unit
Sample
Location
Aquifer Name
Top of
Well Screen
Elevation
(FEET)
Bottom of
Well Screen
Elevation
(FEET)
Latitude
Longitude
Sample
Collection
Date
Analytical Results
ABMW Wells
ABMW-04
Ash Basin
Ash Pore Water
440.76
435.56
36.53130762
-78.89627786
01/16/2018
7.2
6130
117
11
3060
44
540
27
<1
346
587
<1
<1
<0.025
<1
1.82
<1
ABMW-04
Ash Basin
Ash Pore Water
440.76
435.56
36.53130762
-78.89627786
04/03/2018
7.4
5900
123
11
3050
49
530
21
<1
382
623
<1
<1
<0.025
<1
2.41
<1
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
11/08/2018
7.0
5290
91.2
12
2310
43
430
88
<1
63
443
<1
<1
<0.025
0.692 j
0.4441
<1
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
02/06/2019
7.0
5540
96.4
11
2560
84
460
30
<1
96.8
468
<1
<1
<0.025
0.627 j
0.406 j
<1
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
04/02/2019
7.0
5580
95.1 M4
12
2440
98
470
NA
NA
173
452
NA
NA
<0.025
0.343 j
0.623 j
NA
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
07/03/2019
6.9
5820
97.6
11
2600
110
469
NA
NA
262
464
NA
NA
<0.025
0.454 j
0.807 j
NA
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
01/16/2018
7.3
<50
80.1
5.1
2060
49
320
21
<1
1.8
108
<1
<1
<0.025 P4,RO
<1
<1
<1
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
04/03/2018
7.8
20.206 j
84.4
5.3
2020
48
300
26
<1
1.91
113
<1
<1
<0.025
<1
<1
0.564 j
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
07/18/2018
7.4
<50
80.1
5.4
2020
46
310
15
<1
2.02
109
<1
<1
<0.025
0.347 j
<1
0.393 j
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
11/08/2018
7.8
38.274 j
76.7
5.7
1920
37
320
19
<1
1.97
118
<1
<1
<0.025
0.521 j
<1
<1
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
04/02/2019
7.8
25.329 j
80
5.7
1970
43
340
NA
NA
2.71
122
NA
NA
<0.025
<1
<1
NA
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
01/16/2018
6.4
3450
111
14
1840
1.7
550
386
<1
24.9
890
<1
<1
<0.025 P4,R0
1.16
5.85
<1
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
04/03/2018
6.3
3050
Ill
14
1590
0.55
520
184
<1
23
904
<1
<1
<0.025 P4,R0
0.95 j
6.11
<1
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
07/18/2018
6.1
3430
114
14
1760
1.6
530
159
<1
23.1
907
<1
<1
<0.025 P4,R0
0.759 j
5.34
<1
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
11/08/2018
6.3
3040
111
13
1580
2.3
500
115
<1
21.4
901
<1
<1
<0.025
0.795 j
6.3
<1
ABMW-04D
L_
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
04/02/2019
6.3
3240
105
15
1640
1.2
520
NA
NA
15.5
870
NA
NA
<0.025
0.78 j
6.36
NA
Notes:
0 Bold highlighted concentration indicates exceedance of the 15A NCAC 02L .0202 Standard or the IMAC. (Effective date for 15A NCAC 02L .0202 Standard and IMAC is April 1, 2013)
Turbidity of Sample >_ 10 NTUs
< - Concentration not detected at or above the adjusted reporting limit.
* - Interim Maximum Allowable Concentrations of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
pg/L - Micrograms per liter
Bl - Target analyte detected in 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 affected by 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.
B3 - Target analyte was detected in Continuing Calibration 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.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike was acceptable.
M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. The associated Laboratory Control Spike recovery was acceptable.
mg - N/L - Milligrams nitrogen per liter
mg/L - Milligrams per liter
NA - Not analyzed
NE - Not established
P4 - Sample field preservation does not meet EPA or method recommendations for this analysis.
RO - The data are unusable. The sample results are rejected due to serious deficiencies in meeting quality control criteria. The analyte may or may not be present in the sample.
Rl - Relative Percent Difference value was outside control limits.
S.U. - Standard Units
Sl - Data review findings indicate result may be unreliable, however, data is usable.
Prepared by: PWA Checked by: JAW
Page 3 of 4

TABLE 1
ANALYTICAL DATA FOR CPA-01D/BR, CPA-07D, AND ABMW-04/X/D/BR (JANUARY 2018 - PRESENT)
ASSESSMENT CLARIFICATION
COAL PILE STORAGE AREA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, PERSON COUNTY, ROXBORO, NC
Analytical Parameter
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
Nitrate +
Nitrite
Potassium
Selenium
Sodium
Thallium
Vanadium
Zinc
Reporting Units
pg/L
Ng/L
Ng/L
mg/L
Ng/L
Ng/L
pg/L
pg/L
mg-N/L
mg/L
Ng/L
mg/L
pg/L
pg/L
Ng/L
15A NCAC 02L Standard
300
15
NE
NE
50
1
NE
100
NE
NE
20
NE
0.2*
0.3*
1000
Provisional Background Threshold Values (Transition Zone Unit)
1319
1
NE
1 13.5
1 298
0.2
1
1 5
1 0.295
1 3.61
1 1
1 53.3
1 0.2
1 5.88
12
Provisional Background Threshold Values (Bedrock Unit)
2550
1
NE
13.1
544
0.05
13.1
5
1.03
6.56
1
72.6
0.2
5.52
37.9
Sample ID
Associated
Unit
Sample
Location
Aquifer Name
Top of
Well Screen
Elevation
(FEET)
Bottom of
Well Screen
Elevation
(FEET)
Latitude
Longitude
Sample
Collection
Date
Analytical Results
ABMW-04
Ash Basin
Ash Pore Water
440.76
435.56
36.53130762
-78.89627786
01/16/2018
6980
<1
546
31.5 R1
2150
<0.05
281
<1
0.03
27.3 B3
<1
15.5 B1
<0.2
4.06
<5
ABMW-04
Ash Basin
Ash Pore Water
440.76
435.56
36.53130762
-78.89627786
04/03/2018
8150
<1
530
32.7
2190
<0.05
320
1.05
<0.02
27.5
<1
14.5
0.105 j
3.94
<5
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
11/08/2018
3570
<1
505
23.3
1390
<0.05
158
<1
0.0069j
18.7
0.508j
16.3
<0.2
2.81
<5
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
02/06/2019
5910
<1
557
24.7
1500
<0.05
198
<1
0.011
19.9
0.406j
14
0.181j
1.64
2.98j
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
04/02/2019
7980
NA
NA
23.4
1440
NA
323
NA
0.024
20.1
NA
13.4
NA
1.6
NA
ABMW-04X
Ash Basin
Ash Pore Water
441.65
436.65
36.53130723
-78.89636491
07/03/2019
10900
NA
NA
25.2
1500
NA
445
NA
0.033
21.1
NA
13.3
NA
1.32
NA
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
01/16/2018
790
<1
<5
5.61
448
<0.05
5.55
<1
<0.02
5.92 B3
<1
20.7 B1
<0.2
<0.3
<5
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
04/03/2018
918
<1
2.571j
5.98
474
<0.05
5.36
<1
<0.02
5.86
<1
20.7
<0.2
0.218j
<5
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
07/18/2018
790
<1
3.255j
5.96
483
<0.05
5.5
0.3621
<0.01
5.84
<1
20.2
<0.2
0.349
<5
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
11/08/2018
589
<1
3.015j
5.58
435
<0.05
22.3
<1
<0.01
6.18
<1
27
<0.2
0.189j
<5
ABMW-04BR
Ash Basin
Bedrock
389.92
380.12
36.53131508
-78.89629771
04/02/2019
973
NA
NA
5.67
507
NA
9.94
NA
<0.01
5.83
NA
22.4
NA
<0.3
NA
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
01/16/2018
56900
<1
24
34.1
6160
<0.05
15.7
1.52
0.071
15 B3
<1
16.3 B1
<0.2
8.58
<5
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
04/03/2018
57900
<1
12
34.2
6190
<0.05
3.26
1.46
0.046
13.1
<1
15.9
<0.2
10.3
<5
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
07/18/2018
54500
<1
31
37.5
6360
<0.05
17.1
0.893 j
0.027
16.3
<1
17 B2
0.106 j
8.52
6 B2
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
11/08/2018
53600
<1
17
33.2
6590
<0.05
8.07
0.947 j
0.037
13.7
<1
16.1
<0.2
9.75
<5
ABMW-04D
Ash Basin
Transition Zone
432.88
427.68
36.53132057
-78.89631487
04/02/2019
46800
NA
NA
33.1
6960
NA
16.5
NA
0.056
14.3
NA
16.2
NA
7.99
NA
Notes:
Bold highlighted concentration indicates exceedance of the 15A NCAC 02L .0202 Standard or the IMAC. (Effective date for 15A NCAC 02L .0202 Standard and IMAC is April 1, 2013)
Turbidity of Sample >_ 10 NTUs
< - Concentration not detected at or above the adjusted reporting limit.
* - Interim Maximum Allowable Concentrations of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
pg/L - Micrograms per liter
B1 - Target analyte detected in 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 affected by 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.
B3 - Target analyte was detected in Continuing Calibration 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.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike was acceptable.
M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. The associated Laboratory Control Spike recovery was acceptable.
mg - N/L - Milligrams nitrogen per liter
mg/L - Milligrams per liter
NA - Not analyzed
NE - Not established
P4 - Sample field preservation does not meet EPA or method recommendations for this analysis.
RO - The data are unusable. The sample results are rejected due to serious deficiencies in meeting quality control criteria. The analyte may or may not be present in the sample.
R1 - Relative Percent Difference value was outside control limits.
S.U. - Standard Units
S1 - Data review findings indicate result may be unreliable, however, data is usable.
Prepared by: PWA Checked by: JAW
Page 4 of 4