Soil Bkgd Tech Memo_REV1_20170526

F)2
Technical Memorandum
Date: Friday, May 26, 2017
Project: Cliffside Steam Station
To: Ryan Czop
From: Scott Spinner
Subject: Quantification of Valid Background Soil Samples for Statistical Calculations — Revision 1
The purpose of this revised technical memorandum (TM) is to address the North Carolina Department of
Environmental Quality's (NCDEQ's) requirement identified below. In addition, this revised TM provides the
basis for evaluation of soil samples proposed for use in determining site-specific background
concentrations using statistical methods for the Cliffside Steam Station (CSS) as originally presented in
the TM dated December 20, 2016.
Following submittal of the TM dated December 20, 2016, Duke Energy submitted the Statistical Methods
for Developing Reference Background Concentrations for Groundwater and Soil at Coal Ash Facilities
(Background Methodology) to NCDEQ on January 20, 2017. NCDEQ subsequently requested additional
information regarding the Background Methodology via a letter dated April 28, 2017. As part of the April
28, 2017 letter, NCDEQ requested the following information:
• Provide up-to-date digital spreadsheets of raw background soil data for each facility by May 26,
2017. Any soil data collected since submittal of the Comprehensive Site Assessments (CSAs)
should be included in the table and existing soil data should be reviewed to identify any quality
control issues (i.e., sampling intervals, corresponding boring sample ID, etc.) along with
identification of outliers and revised accordingly.
The up-to-date raw background soil data for background determinations at CSS are provided in Table 1
of this revised TM. Note the remainder of the requirements in the April 28, 2017 NCDEQ letter are
addressed in a revision to the Background Methodology under separate cover.
The soil samples evaluated herein were principally collected during CSA fieldwork conducted between
February and June 2015. The locations of soil samples to be evaluated for use in the background
determinations are shown on Figure 1.
Viability of samples for use in developing background concentrations was evaluated using the following
criteria:
• Soil sample is collected from a location that is not impacted by coal combustion residuals or coal -
associated materials;
• Soil sample is collected from a location that is not impacted by other potential anthropogenic
sources of constituents;
• Soil sample is collected from the unsaturated zone, above the maximum groundwater elevation
measured in shallow wells during eight well gauging events conducted between June 2015 and
September 2016; and
9 Soil sample collected from a location not impacted by periodic flooding.

F)2
A total of 88 soil samples were collected at Cliffside during CSA activities. Of these 88 samples, 29
samples satisfied the four criteria listed above and are considered viable samples for use in statistical
calculations. These samples were collected from the following locations on-site: BG-1S/D, BG -21D, MW -
30D, MW-32S/D, MW -38D, MW-40BRU, MW -42D, GWA-31D, GWA-61D, GWA-10D, GWA-12BRU, GWA-
21 BRU, GWA-22S, GWA-25D, GWA-27D, and GWA-31 D/BR. Note that viable samples collected from
borings near the waste boundary or down -gradient of ash management areas were collected at least one
foot above the maximum measured groundwater elevation and are assumed to have not been impacted
by groundwater migrating from ash sources.
Soil sampling data used in this evaluation, including the range of groundwater elevations for shallow wells
in each well cluster and analytical results of soil samples are provided in Table 1. Note that laboratory
reporting limits for antimony, arsenic, selenium, and thallium exceeded the North Carolina Protection of
Groundwater (POG) Preliminary Soil Remediation Goals, as revised in October 2016.

BROAD RIVER LL�
GWA-32D o
.GWA-32BR O a
(WL ONLY) i Q
CJ
CLFSTR053 CLFWW057
*
h+y
GWA-10S r S_3 CLIMW
MW -4D* -
i - GWA-10D°' CLFSP051 CLFSP058
-- - _ * 5-10
. I B-15 * C LFTD052 S-11 GWA-11S
IB -1D GWA-285
IB-2S-SL*�GWA-11BRU GWA-28BR
\ * GWA-28BRU
MW -38S I B-21 * I B -3S M W-2 5 DR
MW -38D GWA_37S CLIFFSIDE STEAM STATION IB-2AL U IB -3D S-13GWA-29D S-25
MW-38BR GWA 37D CLFSP059
UNITS 1-4 S-33 GWA-29BR S- S_
MW-36BRU GWA-35S GWA-14S INACTIVE ASH BASIN CLFSTRD55 S-12
S-17 S_2 SW 4 - CLP -1 S-23
GWA-35D� GWA-14D IB -4S -SL* S_26S 4
SW -9 CLFSD003� GWA -
CLFTDO04 GWA36S UNITS GWA-14BR-.'.> IB -4D* GWA-128 S - S-34 (WL ONLY)
-3D * 9 S-25 BRU
\\
\ � `k T��n `�vt +Y•�� fpm y _ x I a r b.,. .,.'
s �
Q
CLP -2
o i
Q (WL ONLY)ul
�•�
Q Q �
Z MW -20D
M W-20DR
GWA-22S SW -10C
i GWA-22BRU SW -10B 0
CLFSTR064 SW -10A
S-6 S-7
8.22 CLFSTR065
24 GWA-21S
GWA-21BRU
GWA-21BR MW -11S
S-1 GWA-2BR CLFTDO05 GWA-36D IB-4BR GWA-12BRU i�=m AB -1S
GWA-2BRUV � AS -2D 5-55 CLMW-5S
MW -40S GWA-38S CLMW-2� AS-2BR AS-5BRU CLMW-5D AMD
GWA-34S GWA-25 5-18/� MW-40BRU �I GWA-38D MW -ZD* AS- S AS-5BR
S -19A 5-19- jam% U5 -5D GWA-45 , GWA-1368 MW-2DA ASH AS AS- 6S 19
SW -7
U5 3S* U5-5B'RS-20 GWA-4D GWA-425 GWA-395 - AS 6D
U 5 45 AS B
MW -34S
M W-34BRU
� _■�
U5 -3S -A* -'' S-21
U5 -3D* U5 -4D UNITE f 1 tWL ONLY} (WL ONLY) STORAGE nAS-EBR
U5-4BR �-U5-65 M.� S-15 AS,1 B AS -4S MW -105
U5 -25 -SL
U5 -61D A �, \ GWA-33S SW -3 CLIVI 3S` A51 ASH AS 4D MW -10D
'- .�, �, CLMW- ��°` CLP -3
US -2S L-A UNIT 5 INACTIVE CLFSD063 �A GWA-33D ��, STORAGE,
U5 - JP--/' ASH BASIN U5 -7S** - GWA-33BR �CLFSP061 /� (WL ONLY)
U5- :13113 U5-7SL GWA-31D S-14
-4-31BR*U5-7D* GWAGWA-435 CLIP
GWA-20BR LMW-1GWA-31BR-A GWA-43D 4�GWA-20S (WL O
NLY)
GWA-44S S-16 GWA-20D
U15 -1S � j/ � - _ \
w r �'� _ / GWA 44D AB -2S
U5 -1D II j �1 y 5-27
GWA-6S
r; GWA-6 D
(WL ONLY)
LIWA-4468 AB -2D ACTIVE
a
GWA-408 AB -3S
GWA-55 �\ � , i ) M�%; ')On (WL ONLY} MW_8D AQ_OI ASH BASIN
AB -31
AB-31BRU
GWA-46D AB-31BR
BG -2D SW -8 GWA-27D-A
U5 -8S S-28
GWA-27BR
e U5-8& S-29 ' MW -7D
J SW -1 U15 -813R MW -42S S-30 S-31
MW -42D GWA-45S S-32
GWA-45D
(WL ONLY)
CC -P -M 5
MW -325 GWA-305
ry MW -32D
MW-32BR GWA-30BRU
(WL ONLY) GWA 47D
\\ e e® GWA-30BR
CCPMW-4 - \ LQ'
CCP W-65 ` �• MW -30S JG� GWA-26S
CUM -6D �` MW -30D `� GWA-26D
(WL ONLY)
e ( ( C e e S-8
k
1Ir ��- a_ CLMW--6
AB -4S
AB-4SL
AB -4D
AB-4BR
SW -5
MW -11D
(WL ONLY)
GWA-24S
GWA-24D
GWA-24BR
MW -21D
MW-21BR
GWA-23D
AB -5S
AB-51BRU-�� GWA-48BR
AB -513R MW-22BR
AB -6S MW-22DR
AB -6D
AB -66R o�r_\I
NOTES:
1. PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATEAND IS
APPROXIMATE.
2. WASTE BOUNDARY AND ASH STORAGE AREA BOUNDARY ARE APPROXIMATE.
3. AS -BUILT MONITORING WELL LOCATIONS PROVIDED BY DUKE ENERGY.
4. CSA AND POST CSA SHALLOW MONITORING WELLS (S) ARE SCREENED ACROSS THE SURFICIAL
WATER TABLE.
5. CSA AND POST CSA SHALLOW LOWER MONITORING WELLS (SL)- BOTTOM OF WELL SCREEN
SET AT THE ASH -REGOLITH INTERFACE.
6. CSA AND POST CSA INTERMEDIATE MONITORING WELLS (1) -WELL SCREEN INSTALLED IN
REGOLITH BELOW WATER TABLE AND BELOW ASH IN ASH BASIN.
7. CSA AND POST CSA ALLUVIUM (AL) MONITORING WELLSARE SCREENED WITHIN ALLUVIUM.
S. CSA AND POST CSA DEEP MONITORING WELLS (D) ARE SCREENED IN THETRANSITION ZONE
BETWEEN COMPETENT BEDROCK ANDTHE REGOLITH.
9. CSA AND POST CSA UPPER BEDROCK (BRU) WELLS ARE SCREENED NEARTHETOPOF
COMPETENT BEDROCK BELOW THE REGOLITH WHERE THE TRANSITION ZONE IS NOTPRESENT.
10. CSA AND POST CSA BEDROCK (BR) MONITORING WELLS ARE SCREENED WITHIN COMPETENT
BEDROCK.
11. TOPOGRAPHY DATA ONSITE AND NORTH OF DUKE POWER (MCCRAW) ROADAND PROSPECT
CHURCH ROAD (2 -FOOT CONTOUR INTERVAL) WAS OBTAINED FROM WSP (APRIL 2015). SCALE {FEET)
12. TOPOGRAPHY DATA NORTH OF THE BROAD RIVER, SOUTH OF DUKE POWER ROAD, AND 200' 0 200' 400'
OFFSITE TO THE SOUTH (4 -FOOT CONTOUR INTERVAL) WAS OBTAINED FROM NCDOTWEB
SITE (2010). J" - 400'
13. AERIAL PHOTOGRAPHY WAS OBTAINED FROM WSP DATEDJULY2015.
14. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TOTHE DEFINITION FOUND IN
15A N CAC 02 L .0107 (a).
15. THE UNIT 5 INACTIVE ASH BASIN PROVISIONAL COMPLIANCE BOUNDARY IS DEPICTED PER
THE DEFINITION FOUND IN 15A NCAC 02L.0107 (a).THE ESTABLISHMENT OF THE
PROVISIONAL COMPLIANCE BOUNDARY AND ASSOCIATED COMPLIANCE MONITORING WELLS
ARE PENDING REVIEW AND APPROVAL BY NCDEQ.
16. HYDROGRAPHY WAS OBTAINED FROM THE PROVISIONAL JURISDICTIONAL WATERS MAP
(USAGE APPROVAL PENDING), PROVIDED BY AMEC FOSTER WHEELER, DATED MAY 29, 2015.
SAMPLE LOCATION MAP
ABANDONEDWELLS
WELL ID
- - 1--
EASTING
GWA-25S
545724.0
1179262.0
GWA-31BR
SSW
GWA-25D
CCPMW-1S
545875.4
1176636.1
-2
(WL ONLY)
CCPMW-1D
IB -1S
e
1176407.3
IB-2AL
545888.7
1176632.6
1 B-21
545863.4
1176644.0
IB -2S -SL
545912.1
e�
BG -1S
545507.7
CLIFFSIDE CCP L-A-N-DFILL
1 B -4D
545503.1
ABG -11D
BG -IBR
IB -4S -SL
PERMIT #81-06
1176907.2
MW -2D
,`-
MW -24D
U5 -3D
545043.9
1172643.6
®
545042.7
1172647.9
CCPTW-1SMW-24DR
545045.7
\
U5 -7D
544583.0
CCPTW-1D
U5 -7S
544587.9
1173960.1
U5-7SL
544593.9
1173962.1
CCPTW-2
CCPMW-2S
CCPMW-3D
G'�Ae
SQA
AOR
CCPMW-2D r,_ _
CCPMW-3S
NOTES:
1. PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATEAND IS
APPROXIMATE.
2. WASTE BOUNDARY AND ASH STORAGE AREA BOUNDARY ARE APPROXIMATE.
3. AS -BUILT MONITORING WELL LOCATIONS PROVIDED BY DUKE ENERGY.
4. CSA AND POST CSA SHALLOW MONITORING WELLS (S) ARE SCREENED ACROSS THE SURFICIAL
WATER TABLE.
5. CSA AND POST CSA SHALLOW LOWER MONITORING WELLS (SL)- BOTTOM OF WELL SCREEN
SET AT THE ASH -REGOLITH INTERFACE.
6. CSA AND POST CSA INTERMEDIATE MONITORING WELLS (1) -WELL SCREEN INSTALLED IN
REGOLITH BELOW WATER TABLE AND BELOW ASH IN ASH BASIN.
7. CSA AND POST CSA ALLUVIUM (AL) MONITORING WELLSARE SCREENED WITHIN ALLUVIUM.
S. CSA AND POST CSA DEEP MONITORING WELLS (D) ARE SCREENED IN THETRANSITION ZONE
BETWEEN COMPETENT BEDROCK ANDTHE REGOLITH.
9. CSA AND POST CSA UPPER BEDROCK (BRU) WELLS ARE SCREENED NEARTHETOPOF
COMPETENT BEDROCK BELOW THE REGOLITH WHERE THE TRANSITION ZONE IS NOTPRESENT.
10. CSA AND POST CSA BEDROCK (BR) MONITORING WELLS ARE SCREENED WITHIN COMPETENT
BEDROCK.
11. TOPOGRAPHY DATA ONSITE AND NORTH OF DUKE POWER (MCCRAW) ROADAND PROSPECT
CHURCH ROAD (2 -FOOT CONTOUR INTERVAL) WAS OBTAINED FROM WSP (APRIL 2015). SCALE {FEET)
12. TOPOGRAPHY DATA NORTH OF THE BROAD RIVER, SOUTH OF DUKE POWER ROAD, AND 200' 0 200' 400'
OFFSITE TO THE SOUTH (4 -FOOT CONTOUR INTERVAL) WAS OBTAINED FROM NCDOTWEB
SITE (2010). J" - 400'
13. AERIAL PHOTOGRAPHY WAS OBTAINED FROM WSP DATEDJULY2015.
14. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TOTHE DEFINITION FOUND IN
15A N CAC 02 L .0107 (a).
15. THE UNIT 5 INACTIVE ASH BASIN PROVISIONAL COMPLIANCE BOUNDARY IS DEPICTED PER
THE DEFINITION FOUND IN 15A NCAC 02L.0107 (a).THE ESTABLISHMENT OF THE
PROVISIONAL COMPLIANCE BOUNDARY AND ASSOCIATED COMPLIANCE MONITORING WELLS
ARE PENDING REVIEW AND APPROVAL BY NCDEQ.
16. HYDROGRAPHY WAS OBTAINED FROM THE PROVISIONAL JURISDICTIONAL WATERS MAP
(USAGE APPROVAL PENDING), PROVIDED BY AMEC FOSTER WHEELER, DATED MAY 29, 2015.
SAMPLE LOCATION MAP
ABANDONEDWELLS
WELL ID
NORTHING
EASTING
CLMW-4
545724.0
1179262.0
GWA-31BR
544586.6
1174353.6
IB-2BRU
545875.4
1176636.1
IB -1D
546207.7
1176417.8
IB -1S
546195.1
1176407.3
IB-2AL
545888.7
1176632.6
1 B-21
545863.4
1176644.0
IB -2S -SL
545912.1
1176622.3
1B-4BR
545507.7
1176894.6
1 B -4D
545503.1
1176913.9
IB -4S -SL
545504.4
1176907.2
MW -2D
545337.0
1177764.0
U5 -3D
545043.9
1172643.6
U5 -3S
545042.7
1172647.9
U5 -3S -A
545045.7
1172638.7
U5 -7D
544583.0
1173958.0
U5 -7S
544587.9
1173960.1
U5-7SL
544593.9
1173962.1
DUKE ENERGY CAROLINAS, LLC
CLIFFSIDE STEAM STATION ASH BASIN
_:E_=No AND RUTHERFORD COUN7ES, rda,rH CAROLINA
DATE
MAY 2017
FIGURE
LEGEND:
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
PROVISIONAL ASH BASIN COMPLIANCE BOUNDARY
LANDFILL/ASH STORAGE AREA BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENT
WITH DUKE PROPERTY BOUNDARY
LANDFILL COMPLIANCE BOUNDARY
STREAM
TOPOGRAPHIC CONTOUR
ASH BASIN COMPLIANCE
GROUNDWATER MONITORING WELL(SEE NOTE 15)
$
ASH BASIN VOLUNTARY
GROUNDWATER MONITORING WELL
CSA GROUNDWATER MONITORING WELL
POST CSA ADDITIONAL ASSESSMENT
GROUNDWATER MONITORING WELL
CCP LANDFILL GROUNDWATER MONITORING WELL
ABANDONED MONITORING WELL
OBSERVATION WELL (WATER LEVEL ONLY)
SURFACE WATER SAMPLE LOCATION
AREA OF WETNESS SAMPLE LOCATION
NCDEQ SAMPLE LOCATIONS
WETLANDS
RIVER FLOW DIRECTION
DUKE ENERGY CAROLINAS, LLC
CLIFFSIDE STEAM STATION ASH BASIN
_:E_=No AND RUTHERFORD COUN7ES, rda,rH CAROLINA
DATE
MAY 2017
FIGURE

Table 1. Analytical Results
General Notes:
Depth -to -Groundwater data was collected in: 6/15,8/15,9/15,11/15,12/15,4/16,6/16,9/16, and 3/17 (month/year)
` - Depth -to -Groundwater range based on data collected from the deep flow layer due to no shallow well present at this location
"Strike-throughs" indicate samples that are not included in the viable sample count due to the method detection limit (MDL) for the non -detect result being greater than the North Carolina Protection of Groundwater (POG) Preliminary Soil Remediation Goal (PSRG) for that constituent.
The criteria for "strike-throughs" (as stipulated by NCDEQ) requires Duke Energy to omit samples resulting in non -detect values higher than the Provisional Soil Remediation Goal for Protection of Groundwater
mg/kg- milligrams per kilogram
NA- Not analyzed or not reported by analytical laboratory
Std. Units - pH units
Comparison Criteria:
NS - No applicable standard for this parameter
Shading indicates exceedance of either applicable criteria.
bold - indicates exceedance of NCDEQ Industrial Health Based PSRG
Italiclundertine- indicates exceedance of NCDEQ Protection of Groundwater
PSRG
North Carolina Department of Environmental Quality Division of Waste
Management Soil Remediation Goals Table (October 2016) - Preliminary
Industrial Health Based Soil Remediation Goal (PSRG) and Protection of
Groundwater PSRG.
**Note: No PSRG for Total Chromium is currently available, as a surrogate
the PSRG for Trivalent Chromium was used for comparison purposes only.
Qualifier Notes:
U - Not detected above the reporting detection limit.
J - Estimated Concentration
J+ - Estimated concentration, biased high.
J --Estimated concentration, biased low.
R - Analytical result rejected.
Anal ,
Aluminum
Antimony
Arsenic
Barium
Boron
Beryllium
Cadmium
Chromium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Molybdenum
Nickel
Selenium
Strontium
Thallium
Vanadium
Zinc
Calcium
Chloride
Magnesium
Nitrate
Potassium
Sodium
Sulfate
pH (field)
Total
Organic
Carbon
CAS RN
7429-90-5
7440-36-0
744038-2
7440-39-3
7440-42-8
7440.41-7
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-89-6
7439-92-1
7439-96-5
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-24-6
7440-28-0
7440.62-2
7440 -fib -6
7440.70-2
16887.00-6
7439-95-4
14797-55-8
7440-09-7
7440.23.5
14808-79-8
PH
TOC
Result Unit
mq/kq
mglkq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mgfkq
mglkq
mgfkq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mq/kq
mqlkq
mglkq
mglkq
mq/kq
mq/kq
Std. Units
mq/kq
NC PSRG Ind
100000
94
3
44000
46000
460
200
100000
70
9400
100000
800
5200
8
1200
4400
1200
100000
2.4
1200
70000
NS
NS
NS
100000
NS
NS
NS
NS
NS
NC PSRG POG
NS
0.9
5.8
580
45
63
3
360000
0.9
700
150
270
65
1
NS
130
2.1
NS
0.28
6
1200
NS
NS
NS
NS
NS
NS
NS
NS
NS
Sample Name
Sample Date
Range of Depth -to -
Water ft
BG -1 D 3.5-5
2/23/2015
20.75-27.15
26100
1.2 U 1
3 U
60.9
3 U
0.54
0.14 U
36.4 1
7.5
15.1 1
35900
24.1
1 75.2
0.0088 J
1 0.6 U
11.3 1
3 U
4.4 1
1-.2-U
59.7
69.3
1 179
314 U
3400
31.4 UJ
1 2920
104
1 314 U
5.4 J
I NA
BG -1D 8.5-10
2/23/2015
20.75-27.15
9490
1.1 U
1.4
57.7
13.3 U
1.2
0.13 U
21.9
8.1
23.7
17400
10.3
64.7
0.0087 U
2.7 U
8
1.4
7.6
0.7 .1
31
92.3
26.5 U
267 U
3520
26.7 UJ
3440
71.2
267U
5.7 J
NA
BG -1S (3.5-5)
3/17/2015
20.75-27.15
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
NA
NA
4850
BG -1S 8.5-10
3/17/2015
20.75-27.15
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
NA
NA
1870
BG -2D 3.5-5
2/23/2015
42.37-47.79*
30600
1.4 U
3.5 U
108
69.4 U
0.92
0.17 U
84
15.2
31.5
61500
18.9
234
0.012 U
0.97
20.4
1.8 J
1.1
141
110
86.9
130
353 U
7920
35.3 UJ
5830
179
353 U
5.5 J
NA
BG -2D 8.5-10
2/23/2015
42.37-47.79*
18200
3.2 -UJ
3.3 J
131
18.4 J-
0.91
0.38 U
85.5
22
13.5
39100
19.5
591 J
0.011 J-
0.64 UJ
19.7 J-
3.1 J
3.2 UJ
3.2-1-
75.7
30 J-
186 J
NA
4940 J
31 UJ
3350
320 U
NA
5.2 J
NA
BG -2D 18.5-20
2/23/2015
42.37-47.79*
9980
4.2-11
3.4 J
98.4
21.7
0.65
0.5 U
109
19.3
10.4
22000
15.1
415
0.013 U
0.83 U
17.1
8.3
0.83 U
4211
60.1
25.7
48.9
400 U
3060
40 UJ
2430
52.1 J+
400 U
5.5 J
4960 J
BG -2D 28.5-30
2/23/2015
42.3747.79*
12700
1.4 U
3.5
148
16.9 U
1.3
0.16 U
71.2
25.6
11.9
16600
11
517
0.01 U
0.68 U
22
1.3 J
0.9
141,
52.9
34.4
38.7
330 U
4810
33 UJ
3580
77.7
330 U
5.7 J
NA
MW -30D (3.5-5.5)
2/23/2015
38.3541.15
25200
1.6 U
3.2 J
78.5
3.9 U
0.62
0.19 U
79.9
7.3
12.4
48500
26.7
145
0.013 U
0.78 U
18.9
2.2 J
1.1
46U
97.8
38.2
220
1 394 U
5080
39.4 UJ
3380
125
394 U
5.9 J
NA
MW30D 8.5-10
2/23/2015
38.3541.15
18900
4.1 U
2.4 J
37.7
4.1 U
0.42
0.49 U
48.1
3.3 J
11.9
27300
19.9
89
0.034
0.82 U
8.1
4.1 U
1.6
4x-1-
70.3
22.9
93.1
NA
1930
39.6 UJ
1890
88.5
NA
61
NA
MW -30D 18.5-20
2/23/2015
38.3541.15
10000
1.9 U
3.5 J
34.3
4.7 U
0.82
0.23 U
80.6
2.4 J
19.3
60600
26
215
0.016 U
0.94 U
16.4
47-11
0.94 U
1:9-1-
125
19
46.9 U
488 U
793
48.8 UJ
596
154
488 U
5J
NA
MW -30D 28.5-30
2/23/2015
38.3541.15
13300
1.5 U
3.6 J
142
27.3 J
1
0.27
88.6
36.1
24.6
38700
30.1
979
0.012 U
7.7 U
1 44.6
5.1
7.7 U
11
93.8
72.7
385 U
NA
7800
38 UJ
6920
771 U
NA
fi.1 J
NA
MW -30S (4-5)
3/10/2015
38.3541.15
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
NA
NA
1450
MW -30S (9-10)
3/10/2015
38.3541.15
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
NA
NA
1840
MW30S 19-20
3/10/2015
38.3541.15
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
NA
NA
865
MW -308 28-29
3/10/2015
38.3541.15
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
NA
NA
1240
MW -32D 3.5-5
3/4/2015
26.90-35.39
25900
1.2 U
3.8
50.1
30.1 U
0.5 J
0.14 U
79.8
5.7
16.6
48700
24
148
0.038
0.48 J+
11.2
1.6 J
1.4
1-2-1-
96.7
22.9
242
317 U
2150
31.7 UJ
1670
113
204 J
5.2 J
2780
MW -32D 8.5-10
3/4/2015
26.90-35.39
19000
1.2 U
1.9 J
56.5
30.6 U
0.34
0.15 U
50.5
6.7
14.6
44800
27.6
107
0.0099 U
0.39 J
10
3.1 U
2
1.21,
74.5
27.5
98.8
309 U
2470
30.9 UJ
1920
126
309 U
61
1740
MW -32D 18.5-20
3/4/2015
26.90-35.39
8000
1.3 U
1.7
26.3
3.3 U
0.14
0.16 U
3.7
3.2
3.1
2760
7.2
62
0.0065 J
0.67 U
6.2
2
13.3
13U
3
4.3
5130
321 U
61.7
32.1 UJ
120
66.6 U
321 U
5.9 J
796
MW -32S22.5-24)
3/12/2015
26.90-35.39
27500
3.9 U
7.9
200
38.9 U
1.6
0.47 U
116
33.8
25.6
46400
13.6
910
0.013 U
7.8 U
49.2
3.9 U
1.4 J+
3:JU
90.1
159
148J-
387 U
11700
38.7 UJ
8100
83.6
387 U
6.3 J
1480
MW -38D 33.5-35
3/2/2015
40.1541.59
8310
1.2 U
3
67.8
3 U
0.31
0.14 U
16.3
43.7
10.7
15100
21
317
0.036
0.44 J+
4.8
1.2 U
4.1
1.2-U
31.7
29.5
163 J+
298 U
2190
29.8 UJ
2640
61.1 J+
298 U
6J
13200
MW 40BRU (3.5-5)
3/30/2015
6.81-9.73
39100
6.1 U
6.1 U
353
15.2 U
3
0.73 U
89.2
22.2
14.7
31100
15.3
411
0.0098 U
3 U
38.2
6,1-11
3.9
64U
71.6
94.7
919
295 U
13600
29.5 UJ
8660
304 U
295 U
7.1 J
811
MW42D 28.5-30
2/23/2015
33.32-36.51
19800
1.6 U
1.8
195
4 UJ
1.3
0.19 U
85.4
13.1
12
21600
6.4
321
0.014 U
0.81 UJ
40.1
1.1 J
7.1
0891
50.9
53.2
857
423 U
13300
42.3 UJ
9000
95.8
423 U
6.6 J
NA
GWA-3D (48.5-50)
4/16/2015
57.03-60.16*
47600
7214
3.9 J.
488
17.9 U
4.5 J-
0.86 UJ
144
17.9
14.9 J-
42800
14.1 J-
463
0.011 UJ
3.6 UJ
75.7 J-
6.6 J-
4.5
7:2 -UJ
105
103J_
451
355 UJ
22100
35.5 UJ
14800
358 U
355 UJ
6.5 J
851 U
GWA-6D 28.5-30
5/8/2015
31.91-39.64
22800
9.7-U
9-7-U
256
24.2 U
2.2
1.2 U
130
20.7
18.4
32800
12.2
601
0.016 U
4.8 U
42.3
9-711
10.1
9.7-1-
78.8
77
1130
466 U
16500
46.6 UJ
13100
483U
466 U
6J
1120 U
GWA-10D (13.5-15)
4/21/2015
18.96-21.80
7080
68111
10.3
45.7
11.1 J
0.41
0.81 U
16.4 J+
5.4 J+
5.7
11100
3.6 J
208
0.011 U
3.4 U
7.5
SRW
4.2
6$U
20.2
22.9
1560 J+
331 U
2220 J
33.1 UJ
1410 J+
339 U
228J
7.6 J
938
GWA-12BRU 20-23.5
3/31/2015
25.39-26.35
13200
2.7-11
2.7 U
29.8
6.8 J
0.16 J
0.32 U
7.4
3
6.2
7640
14.4
152
0.0086 U
2.7 U
2.5
2.7 U
2.7 U
27-11
5
6.2
135 U
266 U
226
26.6 UJ
422
269 U
266 U
6.5 J
378J
GWA-21BRU (5)
5/8/2015
10.21-13.00
11400
5811
2.9 J
40
14 U
0.4
0.67 U
14.6
7.1
9.3
19200
20.2
242
0.012 J-
2.8 U
8.1
561-
5.4
6611
22.7
30.1
5380
272 UJ
4030
27.2 UJ
2240
279 U
224 J-
7.8 J
NA
GWA-228 3-5
5/4/2015
6.35-8.22
19100
6x-1-
8 111
66.9
20.2 U
0.93
0.97 U
30.1
6.6 J
9.2
27900
11.7
256
0.029
4 U
7.5
84-U
3.9 J
a 1 11
50.4
42.8
175 J
407 U
3630
40.7 UJ
2040
403 U
407 U
9.2 J
2510
GWA-25D (8.5-10)
5/11/2015
19.93-21.57
15800
5611
5.6 U
80
14 U
0.48
0.67 U
28.3
11.8
24.5
23500
8.1
254
0.0089 U
2.8 U
11.4
5:6-1,
2.8 U
5611
51.4
65.7
140 U
268 U
3780
26.8 UJ
6150
281 U
268 U
5.1 J
1260
GWA-27D 13.5-15
3/3/2015
47.5948.16*
11300
1.2 U
0.95 J
73.6
16.1
0.36
0.15 U
12.4
73.3
15.2
17600
19.7
1240
0.0099 U
0.49 J
9.4
0.65 J
0.39 J
0.74 J
23.8
54.5
30.4 U
292 U
2160
29.2 UJ
3830
60.8 U
292 U
5.5 J
773 U
GWA-27D 24.9
6/8/2015
47.5948.16*
11600
5,1-11
4.8J
99.7
12.7 U
0.69
0.61 U
17.6
73.8
9.8
24900
9.2
1190
0.0087 U
2.5 U
17
4.5J
2.5 U
54-U
30.3
92
127 U
252 UJ
3020
25.2 UJ
5100
254 U
252 U
5.6 J
NA
GWA-31BR 4
4/21/2015
11.06-16.46*
30000
6.6-11
7.7
174
31.3
1.3
0.79 U
98.8
17.5
21.2
35200
20.6
401
0.019
3.3 U
41.2
661,
5.5
6611
79.9
66.4
1700
317 U
11100
31.7 UJ
8440
329 U
317 U
7.1 J
7370
GWA-31D (7)
4/23/2015
11.06-16.46* 1
15200
511
5 U
140
20.9
0.13 J
0.6 U
69.2
5.8
6.1
22900
5 U
266
0.0077 U
2.5 U
28.8
511
2J
511
61.5
70.8
1600
262 U
10900
26.2 UJ
12900
133 J
135 J
10.7 J
NA
GWA-31D (8.7)
4/23/2015
11.06-16.46*
15000
521)
4.5 J
113
41.6
0.7
0.64 U
43
7.1
12.7
15500
5.5
403
0.0086 U
1.4 J
24.3
5,3-1
115
52-1
37.1
38.8
142000
257 U
8920
25.7 UJ
4910
160 J
162 J
11.5 J
NA
Total Number of Viable Soil Samples >>
35
29
16
27
29
29
29
29
29
29
29
29
29
29
29
29
29
19
29
4
29
29
29
26
29
29
29
29
26
29
21
General Notes:
Depth -to -Groundwater data was collected in: 6/15,8/15,9/15,11/15,12/15,4/16,6/16,9/16, and 3/17 (month/year)
` - Depth -to -Groundwater range based on data collected from the deep flow layer due to no shallow well present at this location
"Strike-throughs" indicate samples that are not included in the viable sample count due to the method detection limit (MDL) for the non -detect result being greater than the North Carolina Protection of Groundwater (POG) Preliminary Soil Remediation Goal (PSRG) for that constituent.
The criteria for "strike-throughs" (as stipulated by NCDEQ) requires Duke Energy to omit samples resulting in non -detect values higher than the Provisional Soil Remediation Goal for Protection of Groundwater
mg/kg- milligrams per kilogram
NA- Not analyzed or not reported by analytical laboratory
Std. Units - pH units
Comparison Criteria:
NS - No applicable standard for this parameter
Shading indicates exceedance of either applicable criteria.
bold - indicates exceedance of NCDEQ Industrial Health Based PSRG
Italiclundertine- indicates exceedance of NCDEQ Protection of Groundwater
PSRG
North Carolina Department of Environmental Quality Division of Waste
Management Soil Remediation Goals Table (October 2016) - Preliminary
Industrial Health Based Soil Remediation Goal (PSRG) and Protection of
Groundwater PSRG.
**Note: No PSRG for Total Chromium is currently available, as a surrogate
the PSRG for Trivalent Chromium was used for comparison purposes only.
Qualifier Notes:
U - Not detected above the reporting detection limit.
J - Estimated Concentration
J+ - Estimated concentration, biased high.
J --Estimated concentration, biased low.
R - Analytical result rejected.