NC0004961_2_FINAL_CSA Sup 2_Figures_20160826

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NOTES:
I. SOURCES: USGS TOPOGRAPHIC MAP - MT. ISLAND LAKE, / CREATED 1993. USGS TOPOGRAPHIC MAP - LAKE NORMAN v -
SOUTH, CREATED 1993. \ = ' �£'� 6ka
4 J�
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SCALE (FEET) )
i000 o 1000 z000
F�2
SITE LOCATION MAP
DUKE ENERGY CAROLINAS, LLC
RIVERBEND STEAM STATION ASH BASIN
DATE
AUGUST 2016
FIGURE
GASTON COUNTY, NORTH CAROLINA

LEGEND
CAMAASSESSMENT GROUNDWATER
MONITORING WELL
NPDES COMPLIANCE GROUNDWATER
MONITORING WELL
NPDES VOLUNTARY GROUNDWATER
MONITORING WELL
CAMAASSESSMENT SURFACE WATER
SAMPLE LOCATION
CAMA ASSESSMENT AREA OF WETNESS
SAMPLE LOCATION
0 WATER SUPPLY WELLS NOT SAMPLED
BY DEQ
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
DUKE ENERGY PROPERTY BOUNDARY
LANDFILL COMPLIANCE BOUNDARY
LANDFILL/STRUCTURAL FILL BOUNDARY
' r
MW-15D �ii y MW-12
MW-15BR GWA-10S
S-4 � IFGW0rl' R
GWAk1S 19 RBSP002 ,m __s iW-4S
GWA-1BRU P' S-5 MW-4 BMW-18
i - D r,
MW-11 D j%, S 3 SW-1 MW-SD
x M ilV--5
W-11 M SR" AB-4S MW-5SMMW-
-;2D AB-1 D 0
ROADS T =
10' TOPOGRAPHY
HYDROGRAPHY
e A
` e 4 1� o
+, kf
P }
�L
f ,
NOTES:
1. AERIAL IMAGERY IS A COMBINATION OF NC ONEMAP (2010) AND A WSP AERIAL SURVEY (2014)
2. TEN FOOT TOPOGRAPHICAL CONTOURS OBTAINED FROM 2015 WSP SURVEY DATA
3. PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AND IS APPROXIMATE
4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L .0107 (a) 0 5OO 1,000 1,500
5. WASTE BOUNDARY IS APPROXIMATE.
6. AS -BUILT CAMA ASSESSMENT AND NPDES SERIES MONITORING WELLS ARE PROVIDED BY DUKE i Feet
ENERGY, WSP, AND OTHERS
7. CAMA HIV DELINEATION WELL LOCATIONS (BLUE LABELS) ARE APPROXIMATE AND HAVE NOT BEEN SURVEYED
8. YELLOW LABELS INDICATE AN ADDITIONAL ASSESSMENT WELL COMPLETED POST-CSA
9. FOR MORE DETAILS REGARDING INDIVIDUAL WATER SUPPLY WELLS, SEE THE WATER SUPPLY WELL
ANALYTICAL RESULTS MAP
3A4S M-4DBWhB
RBWW002 MW-14 S-6
tU - GWA-8D S.
1,09 = sw-2
is AB-3S AB-3D GWA-8S
AB 6S AB-3BR
11
D
AB-5S
AB-6AB -5
BRU` AB-5SL GWA 7D
GWA=7S GWA7BR
AB-8D
OB-1 OB-2
CiWA-bS�� MW-7SR'
AS-3D GWA-14D
AS-3S 'GWA-5S
GWA-5D GWA
" �:
p
P
4
ti}
SAMPLE LOCATION MAP
F)lDUKE ENERGY CAROLINAS, LLC
RIVERBEND STEAM STATION
GASTON COUNTY, NORTH CAROLINA
GWA-23D GWA-23S
GWA-23BR GWA-22S
GWA-22D
MW-81 GWA-22BR-
MW-8D':
DATE
AUGUST 2016
FIGURE
1-2

@A@A
@A@A@A
@A@A
@A@A@A@A@A@A@A@A@A@A@A@A@A@A@A @A@A@A@A @A@A @A@A@A@A@A@A@A@A@A@A@A@A@A@A
@A@A @A@A@A@A@A@A@A @A@A @A@A@A@A@A@A@A@A@A@A@A@A@A@A
@A@A@A@A@A@A@A @A@A@A@A@A
@A@A
@A @A@A@A@A@A@A
@A @A@A@A@A@A@A
@A@A@A@A@A @A@A@A@A
@A
@A@A@A@A
@A@A@A@A
@A@A@A@A
MW-13S
GWA-10S
MW-4S
AB-5S/SLMW-9S/D
C1-S/BRUC2-S/D
AS-2S/D
GWA-22S/BR-A
GWA-20D/BR
BG-5D/BR
BG-4S/D/BR
GWA-13S/D
GWA-4S/BR
GWA-23S/D/BR
AS-1S
GWA-14S BG-1S/D
AS-3S/D
GWA-12S
MW-7BRAB-7DGWA-11S OB -2
OB -1
BG-2S/D/BRAB-8S/D
GWA-3S-A GWA-7S/D/BRAB-6S/BRU
MW-1D
BG-3S/DAB-3S/BR GWA-8S/DMW-10
AB-4S/DGWA-2S/BRU/BR AB-2D GWA-9S
MW-6SAB-1DMW-2S/SA MW-5S/D
MW-11SR/DR
GWA-1BRU MW-3S/D
MW-12MW-15S/D/B R
7 0 0
680
7 7 0
7
3
0
720
7
1
0
7 4 0
670
660
6 5 0
750
730
7 0 0
6 9 0
780
7 7 0
730720
7 0 0
660
7 6 0
7 4 0
7 3 0
710
680
7407307
2
0
740
6 9 0
690680
7
1
0
6
7
0
7 0 0
6 9 0
6 8 0
7 1 0
7 0 0
6 9 0
6
7
0
6
6
0
6
5
0
680
670
6 9 0 6
5
0
680
6
6
0
7
1
0
6 9 0
6 8 0
670
6 7 0
6 6 0
7 2 0 7 1 0
700
6 5 0
6 9 0
6
8
0
6 8 0
6
7
0
7 6 0 750
670
6 9 0
6 5 0
7 8 0
760
6 7 0
7 3 0
7 2 0
750
700
6 6 0
7
4
0
710
6 9 0
680
6
8
0
6 7 0
6 7 0
6 7 0
6 6 0
6 5 0
6
5
0
780780
720
7 2 0
7 3 0
7 1 0
720
7 1 0
710
7 1 0
7
1
0
7 1 0
7
1
0
6 9 0
680
6 8 0
6 7 0
6
8
0
670
6
8
0
670
6
6
0
650
6 5 0
6 6 0
660
720
7 2 0
710
1
WATER SU PPLY WELL LOCATIONDUKE EN ERGY C AROLIN AS, LLCRIVERBEND STEAM STATION ASH B ASIN
GASTO N COUN TY, NORTH CARO LIN A
DATE
AUGUST 2016
¯
D :\A s h B a s i n \W a t e r _S u p p l y _W e l l s \C o m b i n e d _2 0 1 6 \R i v e r b e n d \R i v e r b e n d _W S W _N o T a b l e .m x d m m u r c h i s , 8 /1 1 /2 0 1 6
Legend
REPORTE D WATER SUPPLY WELL
@A CA MA ASSE SSME NT GROUNDWATE R M ONITORING WE LL
@A NP DES COMPLIANCE GROUNDWATER M ONITORING WELL
@A NP DES VOLUNTA RY GROUNDWATER MONITORING WELL0.5 MILE OFFS ET FROM AS H B ASIN COM PLIANCE BOUNDARYASH BASIN COMPLIANCE BOUNDARYASH BASIN COMPLIANCE BOUNDARY COINCIDENT WITH DUKE E NERGY PROPERTY B OUNDARY10-FOOT ELEVATION CONTOURS
FIGURE NOTES:1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.2. PRIVATE WELL LOCATIONS ARE APPROXIMATE.3. ORTHOPHOTOGRAPHY IS FROM NC ONEMAP GIS ONLINE SERVICE AND DUKE ENERGY CAROLINAS, LLC.4. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE. 5. ELEVATION CONTOURS PROVIDED TO DUKE ENERGY BY WSP (2015)6. SAMPLING OF IDENTIFIED WATER SUPPLY WELLS HAS NOT BEEN CONDUCTED BY DUKE ENERGY OR NCDEQ.
FIGURE
1-3
0 0.25 0.5 0.75 10.125 Miles
6 50
7 1 0
760760
69 0
6 90
660
750
7 0 0
690
740
710
6 70
670
740
720
740
6 9 0
720720
700
700
730
750
6 8 0
6 6 0
6
7
0
6 9 0
730
780 710
7 6 0
730
650
7 2 0
6 5 0
740
7 2 0
6 5 0
720
6 60670
7 0 0
6 7 0
730
7 0 0670
670
710
7 1 0
760
7 8 0
7 40
6 8 0
720
660
660
6 8 0
7 1 0
6 7 0
7 1
0
7 10
6 80
6 8 0
6 9 0
6 5 0
6
8 0
7 1 0
6 6 0
7 1 0
680
670
67 0
770
7 0 0
670
6 7 0
680
730
6 9 0
7 40
7 2 0
730
680
6 8 0
7
50
710
710
70 0
6
6
0
7 7 0
650
6 9 071
0
7 2 0
690
6 9 0
7 1 0
6 6 0
670
6 7 0
680
750
6 7 0
650
700
780
680
740
760
700
720
7 3 0
740
700
6 5 0
6 7 0
6
7
0
7 1 0
6 9 0
720
7 1 0
7 0 0
660
6 5 0
7
2
0
7 1 0
66 0
6 90 670
6 8 0
7 1 0
670
6 9 0
770
65 0
7 2 0
D
D
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C a t a w b a R i v e r
6 9 0 '
7 0 0 '
720'
6 7 0 '
6 5 0 '
710'
680'690'
660'
7 2 0 '
710'
700'
690'
6 8 0 '6 7 0 '
6 5 0 '
6 6 0 '
7 2 0 '
7 1 0 '
6 8 0 '
6
5
0
'
6 6 0 '
700'
6
7
0
'
W.E. - 1654.86'
W.E. - 4643.04'
AB-1SAB-1S680.81'680.81'
AB-2SAB-2S678.00'678.00'
AB-3SAB-3S700.52'700.52'AB-5SAB-5S702.13'702.13'
AB-5SLAB-5SL701.74'701.74'
AB-6SAB-6S684.92'684.92'
AB-7SAB-7S712.45'712.45'
AB-8SAB-8S655.91'655.91'
BG-1SBG-1S672.73'672.73'
BG-2SBG-2S651.87'651.87'
BG-3SBG-3S645.98'645.98'
C-1SC-1S654.06'654.06'
C-2SC-2S657.21'657.21'
GWA-10SGWA-10S644.29'644.29'
GWA-11SGWA-11S645.53'645.53'
GWA-12SGWA-12S660.37'660.37'GWA-14SGWA-14S715.36'715.36'
GWA-1SGWA-1S661.40'661.40'
GWA-20SGWA-20S696.22'696.22'
GWA-22SGWA-22S710.29'710.29'
GWA-23SGWA-23S705.07'705.07'
GWA-2SGWA-2S645.42'645.42'
GWA-3S-AGWA-3S-A646.21'646.21'
GWA-4SGWA-4S673.22'673.22'
GWA-5SGWA-5S723.29'723.29'
GWA-6SGWA-6S716.08'716.08'
GWA-7SGWA-7S671.39'671.39'
GWA-8SGWA-8S667.15'667.15'
GWA-9SGWA-9S647.58'647.58'
MW-1SMW-1S651.95'651.95'
MW-2SMW-2S687.17'687.17'
MW-3SMW-3S645.54'645.54'
MW-4SMW-4S648.15'648.15'
MW-5SMW-5S644.02'644.02'
MW-6SMW-6S648.40'648.40'
MW-8IMW-8INMNMMW-8SMW-8SNMNM
AB-4SAB-4SNMNM
AB-7IAB-7I655.47'655.47'
AS-1SAS-1SNMNM AS-2SAS-2SNMNM AS-3SAS-3SNMNM
BG-4SBG-4SNMNM GWA-13SGWA-13SNMNM
GWA-15SGWA-15SNMNM
MW-2S-AMW-2S-ANMNM
OB-1OB-1NMNM OB-2OB-2NMNM
MW-10MW-10NMNM
MW-11SRMW-11SRNMNM
MW-12MW-12NMNM
MW-13MW-13NMNM
MW-14MW-14NMNM
MW-15MW-15NMNM
MW-7SRMW-7SR711.92'711.92'
MW-9MW-9648.09'648.09'
SR-1911
S R-1912
DATE
FIGURE
3-1
P A T H : \\S A C -S R V 0 1 \G I S \P R O J E C T S \D U K E E N E R G Y \A S H B A S I N \M A P _D O C S \R I V E R B E N D \C A P _I I _S U P P L E M E N T \P O T E N T I O M E T R I C F I G U R E S \R E P O R T
_C A P I I _
R I V
E R B E N D _A N S
I B _
G W _
C O N T O U R _S .M X D - U S E R : S
G R O S E N I - D A T
E : 8 /2 6 /2 0
1 6
LEGEND
&<
G WA -2 S 01.0 00 '
ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
D WSP SURFACE WATER ELEVATIONS
GROUNDWATER CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENTWITH DUKE ENERGY PROPERTY BOUNDARY
STREAM
10 FOOT TOPO CONTOURS
AU GUST 2016
N
500 0 500 1,000
SCALE (FEET)
POTENTIOMETRIC SURFACE – SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
NOTES:1. AERIAL PHO TOG RAPH Y OBTAINED FROM NC ONEM AP (2010) AND W SP (2014)2. HYDRO GRAPHY O BTAINED FROM PR OVISION AL JURISDICTIONAL WATERS MAP (USACE APPROVAL PENDING), PRO VIDED BY AM EC FOSTER W HEELER, DATED MAY 29, 20153. PARCEL DATA FO R THE SITE WAS O BTAINED FROM DUKE ENERG Y REAL ESTATE AND IS APPRO XIM ATE4. WASTE BOUNDARY IS APPROXIM ATE5. AS-BUILT MO NITORING W ELL LOCATIONS PROVIDED BY DUKE ENERGY6. G ROUNDWATER ELEVATIONS WERE M EASUR ED O N 6/15/20167. NM - GROUNDWATER ELEVATION NOT MEASURED DURING ROUND 6 (6/15/2016) GAUG IN G EVENT8. WATER SUPPLY W ELL LOCATION S ARE APPR OXIM ATE. THE NUMBERS ASSO CIATED W ITH THE WATER SU PPLY W ELLS CO RRESPOND TO SECTIO N 4 OF THE COM PR EH EN SIVE SITE ASSESSMENT R EPO RT (H DR, 2015)9. TO PO GRAPHIC CONTO URS ACQ UIR ED FROM WSP (DATED APRIL 2014)10. RIVERBEND ELEVATIONS ARE PRESENTED FOR REFERENCE AS PART OF THE SURVEY BY W SP, D ATED JULY 27, 201511. AB-2S AND AB-7I WATER READING NOT USED FOR CO NTOURING
6 50
7 1 0
760760
69 0
6 90
660
750
7 0 0
690
740
710
6 70
670
740
720
740
6 9 0
720720
700
700
730
750
6 8 0
6 6 0
6
7
0
6 9 0
730
780 710
7 6 0
730
650
7 2 0
6 5 0
740
7 2 0
6 5 0
720
6 60670
7 0 0
6 7 0
730
7 0 0670
670
710
7 1 0
760
7 8 0
7 40
6 8 0
720
660
660
6 8 0
7 1 0
6 7 0
7 1
0
7 10
6 80
6 8 0
6 9 0
6 5 0
6
8 0
7 1 0
6 6 0
7 1 0
680
670
67 0
770
7 0 0
670
6 7 0
680
730
6 9 0
7 40
7 2 0
730
680
6 8 0
7
50
710
710
70 0
6
6
0
7 7 0
650
6 9 071
0
7 2 0
690
6 9 0
7 1 0
6 6 0
670
6 7 0
680
750
6 7 0
650
700
780
680
740
760
700
720
7 3 0
740
700
6 5 0
6 7 0
6
7
0
7 1 0
6 9 0
720
7 1 0
7 0 0
660
6 5 0
7
2
0
7 1 0
66 0
6 90 670
6 8 0
7 1 0
670
6 9 0
770
65 0
7 2 0
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<&<
&<
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&<&<
&<
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&<
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&<
&<
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&<
C a t a w b a R i v e r
6 9 0 '
6 6 0 '
710'
7
0
0
'690'680'
6
6
0'
650'
GWA-2BRUGWA-2BRU644.73'644.73'
AB-6BRUAB-6BRU662.05'662.05'
710'
7 0 0 '
6 9 0 '
6 5 0 '
6 8 0 '6 7 0 '
6 6 0 '
7 1 0 '
7 0 0 '
6 5 0 '
6 8 0 '6 7 0 '
670'
AB-1DAB-1D663.51'663.51'
AB-2DAB-2D673.75'673.75'
AB-3DAB-3D693.84'693.84'
AB-5DAB-5D674.45'674.45'
AB-7DAB-7D711.44'711.44'
AB-8DAB-8D657.64'657.64'
BG-1DBG-1D673.06'673.06'
BG-2DBG-2D650.94'650.94'
BG-3DBG-3D645.75'645.75'
C-2DC-2D654.20'654.20'GWA-11DGWA-11D645.01'645.01'
GWA-12DGWA-12D662.77'662.77'
GWA-20DGWA-20D694.47'694.47'
GWA-22DGWA-22D707.19'707.19'
GWA-23DGWA-23D704.05'704.05'
GWA-3DGWA-3D646.23'646.23'
GWA-4DGWA-4D673.23'673.23'GWA-5DGWA-5D719.41'719.41'
GWA-6DGWA-6D715.37'715.37'
GWA-7DGWA-7D670.87'670.87'
GWA-8DGWA-8D667.24'667.24'
GWA-9DGWA-9D652.36'652.36'
MW-15DMW-15D644.32'644.32'
MW-1DMW-1D649.82'649.82'
MW-2DMW-2D684.39'684.39'
MW-3DMW-3D651.94'651.94'MW-4DMW-4D647.39'647.39'
MW-5DMW-5D647.56'647.56'
MW-6DMW-6D650'650'
MW-7DMW-7D712.39'712.39'
MW-9DMW-9D648.30'648.30'
AB-4DAB-4DNMNM
AS-1DAS-1DNMNM
AS-2DAS-2DNMNM
AS-3DAS-3DNMNM
BG-4DBG-4DNMNM
BG-5DBG-5DNMNM
GWA-13DGWA-13DNMNM
GWA-14DGWA-14DNMNM
GWA-15DGWA-15DNMNM
GWA-1BRUGWA-1BRU662.03'662.03'
MW-11DRMW-11DRNMNM
MW-8DMW-8DNMNM
SR-1911
S R -1 9 1 2
DATE
FIGURE
3-2
P A T H : \\S A C -S R V 0 1 \G I S \P R O J E C T S \D U K E E N E R G Y \A S H B A S I N \M A P _D O C S \R I V E R B E N D \C A P _I I _S U P P L E M E N T \P O T E N T I O M E T R I C F I G U R E S \R E P O R T
_C A P I I _
R I V
E R B E N D _A N S
I B _
G W _
C O N T O U R _D .M X D - U S E R : S G R
O S E N I - D A T E
: 8 /2 6 /2 0
1 6
LEGEND
&<
G WA -2 D 01.0 00 'ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
GROUNDWATER CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARYCOINCIDENT WITH DUKE ENERGYPROPERTY BOUNDARY
STREAM
10 FOOT TOPO CONTOURS
N
500 0 500 1,000
SCALE (FEET)
AU GUST 2016
POTENTIOMETRIC SURFACE – DEEP WELLS (D)
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
NOTES:1. AERIAL PHO TOG RAPH Y OBTAINED FROM NC ONEM AP (2010) AND W SP (2014)2. HYDRO GRAPHY O BTAINED FROM PR OVISION AL JURISDICTIONAL WATERS MAP (USACE APPROVAL PENDING), PRO VIDED BY AM EC FOSTER W HEELER, DATED MAY 29, 20153. PARCEL DATA FO R THE SITE WAS O BTAINED FROM DUKE ENERG Y REAL ESTATE AND IS APPRO XIM ATE4. WASTE BOUNDARY IS APPROXIM ATE5. AS-BUILT MO NITORING W ELL LOCATIONS PROVIDED BY DUKE ENERGY6. G ROUNDWATER ELEVATIONS WERE M EASUR ED O N 6/15/20167. NM - GROUNDWATER ELEVATION NOT MEASURED DURING ROUND 6 (6/15/2016) GAUG IN G EVENT8. WATER SUPPLY W ELL LOCATION S ARE APPR OXIM ATE. THE NUMBERS ASSO CIATED W ITH THE WATER SU PPLY W ELLS CO RRESPOND TO SECTIO N 4 OF THE COM PR EH EN SIVE SITE ASSESSMENT R EPO RT (H DR, 2015)9. TO PO GRAPHIC CONTO URS ACQ UIR ED FROM WSP (DATED APRIL 2014)10. RIVERBEND ELEVATIONS ARE PRESENTED FOR REFERENCE AS PART OF THE SURVEY BY W SP, D ATED JULY 27, 2015
650
7 1 0
760760
69 0
6 90
660
750
7 0 0
690
740
710
6 70
670
740
720
740
6 9 0
720720
700
700
730
750
6 8 0
6 6 0
6
7
0
6 9 0
730
780 710
7 6 0
730
650
7 2 0
6 5 0
740
7 2 0
6 5 0
720
6 60670
7 0 0
6 7 0
730
7 0 0670
670
710
7 1 0
760
7 8 0
7 40
6 8 0
720
660
660
6 8 0
7 1 0
6 7 0
7 1
0
7 10
6 80
6 8 0
6 9 0
6 5 0
6
8 0
7 1 0
6 6 0
7 1 0
680
670
67 0
770
7 0 0
670
6 7 0
680
730
6 9 0
7 40
7 2 0
730
680
6 8 0
7
50
710
710
70 0
6
6
0
7 7 0
650
6 9 071
0
7 2 0
690
6 9 0
7 1 0
6 6 0
670
6 7 0
680
750
6 7 0
650
700
780
680
740
760
700
720
7 3 0
740
700
6 5 0
6 7 0
6
7
0
7 1 0
6 9 0
720
7 1 0
7 0 0
660
6 5 0
7
2
0
7 1 0
66 0
6 90 670
6 8 0
7 1 0
670
6 9 0
770
65 0
7 2 0
&<
&<
&<
&<
&<
&<
&<&<&<
&<
&<
&<
&<
&<
&<
&<
&<
C a t a w b a R i v e r
660'
670'
680'
650'
690'
710'
7 1 0 '
700'
7 0 0 '6 9 0 '6 8 0 '
6 7 0 '
660'
6 5 0 '
6 5 0 '
650'
7 1 0 '
7 0 0 '
6 9 0 '
6 8 0 '
6 6 0 '
6 7 0 '
6 5 0 '
AB-3BRAB-3BR698.96'698.96'
BG-2BRBG-2BR650.33'650.33'
BG-4BRBG-4BR538.39'538.39'
BG-5BRBG-5BR681.58'681.58'
C-1BRUC-1BRU600.34'600.34'
GWA-10BRUGWA-10BRU644.44'644.44'
GWA-20BRGWA-20BR693.58'693.58'
GWA-22BR-AGWA-22BR-A706.78'706.78'
GWA-23BRGWA-23BR702.37'702.37'
GWA-2BRGWA-2BR645.52'645.52'
GWA-4BRGWA-4BR674.56'674.56'
GWA-7BRGWA-7BR670.47'670.47'
GWA-9BRGWA-9BR545.08'545.08'
MW-15BRMW-15BR644.40'644.40'
MW-7BRMW-7BR712.11'712.11'
MW-9BRMW-9BR649.11'649.11'
GWA-3BRGWA-3BRNMNM
SR-1911
S R -1 9 1 2
DATE
FIGURE
3-3
P A T H : \\S A C -S R V 0 1 \G I S \P R O J E C T S \D U K E E N E R G Y \A S H B A S I N \M A P _D O C S \R I V E R B E N D \C A P _I I _S U P P L E M E N T \P O T E N T I O M E T R I C F I G U R E S \R E P O R T
_C A P I I _
R I V
E R B E N D _A N S
I B _
G W _
C O N T O U R _B R .M X D - U S E R : S
G R O S E N I - D A T
E : 8 /2 6 /2 0
1 6
LEGEND
&<
G WA -2 RB 01.0 00 '
ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
GROUNDWATER CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARYCOINCIDENT WITH DUKE ENERGYPROPERTY BOUNDARY
STREAM
10 FOOT TOPO CONTOURS
N
600 0 600
SCALE (FEET)
AU GUST 2016
POTENTIOMETRIC SURFACE – BEDROCK WELLS (BR)
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
NOTES:1. AERIAL PHO TOG RAPH Y OBTAINED FROM NC ONEM AP (2010) AND W SP (2014)2. HYDRO GRAPHY O BTAINED FROM PR OVISION AL JURISDICTIONAL WATERS MAP (USACE APPROVAL PENDING), PRO VIDED BY AM EC FOSTER W HEELER, DATED MAY 29, 20153. PARCEL DATA FO R THE SITE WAS O BTAINED FROM DUKE ENERG Y REAL ESTATE AND IS APPRO XIM ATE4. WASTE BOUNDARY IS APPROXIM ATE5. AS-BUILT MO NITORING W ELL LOCATIONS PROVIDED BY DUKE ENERGY6. G ROUNDWATER ELEVATIONS WERE M EASUR ED O N 6/15/20167. NM - GROUNDWATER ELEVATION NOT MEASURED DURING ROUND 6 (6/15/2016) GAUG IN G EVENT8. WATER SUPPLY W ELL LOCATION S ARE APPR OXIM ATE. THE NUMBERS ASSO CIATED W ITH THE WATER SU PPLY W ELLS CO RRESPOND TO SECTIO N 4 OF THE COM PR EH EN SIVE SITE ASSESSMENT R EPO RT (H DR, 2015)9. TO PO GRAPHIC CONTO URS ACQ UIR ED FROM WSP (DATED APRIL 2014)10. RIVERBEND ELEVATIONS ARE PRESENTED FOR REFERENCE AS PART OF THE SURVEY BY W SP, D ATED JULY 27, 201511. BG-4BR , BG-5BR, AND GWA-9BR WATER READ ING S NO T USED FO R CONTO URIN G
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
1 1
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 S0.7 2 (0 .15 J)AB-2 S2.2 (1.9 )
AB-6 S0.4 J (0 .3 6J)
AB-7 I0.3 2J (0.35J)
AB-8 S˂0 .5 U (˂0.5 U)
BG-1S˂0 .5 U (˂0.5 U)
BG-2S0.4 4J (0.7 )
BG-3S˂0 .5 U (˂0.5 U)
C-2S˂0 .5 U (˂0.5 U)
GWA-10 S˂0 .5 U (˂0 .5 U)
GWA-11 S0.5 (˂0.5U)
GWA-12 S0.2 J (0.1J)
GWA-14 S0.4 8J (0 .4 8J)
GWA-1S˂0 .5 U (˂0 .5 U)
GWA-20 S0.2 6J (0 .2 1J)
GWA-21 S0.11J (0.1J)
GWA-22 S˂0 .5 U (˂0 .5 U)GWA-23 S˂0 .5 U (0.11 J)
GWA-2S˂0 .5 U (˂0 .5 U)
GWA-3S-A˂1 0U (˂10U)
GWA-4S˂5 U (˂5 U)
GWA-6S0.1 9J (0 .1 9J)
GWA-7S˂0 .5 U (˂0 .5 U)
GWA-8S˂0 .5 U (˂0 .5 U)
GWA-9S˂0 .5 U (˂0 .5U )
MW-1S˂0 .5 U (˂0 .5 U)
MW-2S˂0 .5 U (˂0 .5 U)
MW-3S˂0 .5 U (˂0 .5 U)MW-4S˂0 .5 U (˂0 .5 U)MW-5S˂0 .5 U (˂0 .5 U)
MW-6S˂0 .5 U (˂0 .5 U)
AB-3S˂0.5U (˂0.5U)
AB-4S0.8 (0.81 )
AB-5S18 (17.2 )
AB-5SL2.7J (2.6J)
AB-7S0.71 (0.72 )C-1S˂0.5U (˂0.5U)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
ANTIMONY ISOCON CEN TRAT ION CONTOUR MAP - SHAL LOW WEL LS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.1
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR AN TIMONY IS 1 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
11
11
11
11
1 1
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
AB-1 D4.2 J (3.6 )
AB-2 D0.1 J (0 .1 4J)
AB-3 D2.3 J (2.7J )
AB-4 D1.6 (0.74 )
AB-5 D1.6 (1.1 )AB-6 BRU1.7 (1.4 )
AB-7 D1.1 (0.62 )
AB-8 D˂0 .5 U (˂0.5 U)
BG-1D0.9 8 (1.1 )
BG-2D2.1 (2.1 )
BG-3D˂0 .5 U (˂0.5 U)
C-2D0.3 5J (0.31J)
GWA-10 BRU1.5 J (1.2J )
GWA-11 D˂1 0U (˂10 U)
GWA-12 D0.3 5J (0 .3 J)
GWA-1BRU˂0 .5 U (˂0 .5 U)
GWA-20 D˂1 0U (˂10U)
GWA-21 D0.3 9J (0 .1 2J)
GWA-22 D0.1 6J (˂0.5U)GWA-23 D0.5 7 (0.54 )
GWA-3D˂1 0U (˂10U)
GWA-4D˂5 U (˂5 U)
GWA-5D˂0 .5 U (˂0 .5 U)
GWA-6D˂5 U (˂5 U)
GWA-7D˂0 .5 U (˂0 .5 U)
GWA-8D0.2 8J (0 .2 9J)
GWA-9D˂0 .5 U (˂0 .5 U)
MW-15D˂5 U (˂5 U)
MW-1D˂0 .5 U (˂0 .5 U)
MW-2D5.4 (0 .5 )
MW-3D˂0 .5 U (˂0 .5 U)MW-4D˂0 .5 U (˂0 .5 U)
MW-5D˂0 .5 U (˂0 .5 U)
MW-6D˂0 .5 U (˂0 .5 U)
MW-7D˂0 .5 U (˂0 .5 U)
MW-9D4.6 (2.5 )
ANTIMONY ISOCON CEN TRAT ION CONTOUR MAP - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.2
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR AN TIMONY IS 1 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
11
1 1
11
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR2.7 (2.5 )
BG-2B R˂0 .5 U (˂0.5 U)
BG-5B R1.4 (2.4 )
GWA-20 BR15 (13 .7 )
GWA-21 BR1.3 J (1.4J )
GWA-22 BR-A0.7 (0.63 )
GWA-23 BR2J (2.1J )
GWA-2BR0.3 J (0.28 J)
GWA-4BR4.8 J (4.2J )
GWA-7BR˂0 .5 U (˂0 .5 U)
MW-15BR˂0 .5 U (˂0 .5 U)
MW-7BR6.5 J (7.4J )
MW-9BR0.6 4 (3.5J )
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
ANTIMONY ISOCON CEN TRAT ION CONTOUR MAP - BEDR OCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.3
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR AN TIMONY IS 1 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S341 (324 )
AB-4S151 (129 )
AB-5S497 (466 )
AB-5SL82.4 (74.1 )
AB-7S227 (189 )C-1S11.2 (12.4 )
AB-1 S0.0 78J (˂0.1U)
AB-2 S0.11 (0.073 J)
AB-6 S0.8 6 (0 .77 )
AB-7 I0.8 1 (0 .55 )
AB-8 S0.0 44J (˂0.1U)
BG-1S˂0 .1 U (˂0.1 U)
BG-2S0.0 55J (0.041 J)
BG-3S0.3 (0.25 )
C-2S0.9 6 (1 )
GWA-10 S0.0 57J (0.041 J)
GWA-11 S0.3 2 (0 .2 8 )
GWA-12 S0.2 4 (0.24 )
GWA-14 S0.1 2 (0 .11 )
GWA-1S0.0 62J (0.05J)
GWA-20 S0.0 89J (0.048 J)
GWA-21 S˂0 .1 U (˂0 .1 U)
GWA-22 S0.1 7 (0.17 )GWA-23 S0.0 61J (0.062 J)
GWA-2S0.0 53J (˂0 .1 U)
GWA-3S-A˂2 U (˂2 U)
GWA-4S0.8 2J (0 .7 4J)
GWA-6S0.2 3 (0.18 )
GWA-7S0.11 (0 .1 )
GWA-8S˂0 .1 U (˂0 .1 U)
GWA-9S0.0 59J (0.046 J)
MW-1S0.3 6 (0.36 )
MW-2S0.3 6 (0.36 )
MW-3S˂0 .1 U (˂0 .1 U)MW-4S0.2 8 (0.48 )MW-5S˂0 .1 U (˂0 .1 U)
MW-6S˂0 .1 U (˂0 .1 U)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
ARSENIC ISOCONCENTRAT ION CONTOUR MA P - SHA LLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.4
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR ARSENIC IS 10 µg/L• 1.4J(1.8J) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D˂1 U (0.2 )
AB-2 D0.2 5 (0 .25 )
AB-3 D˂2 U (˂2U)
AB-4 D0.8 (0.64 )
AB-5 D0.5 5 (0 .28 )AB-6 BRU0.2 2 (0 .2 )
AB-7 D2.9 (2.6 )
AB-8 D0.0 91J (0.076 J)
BG-1D0.4 8 (0 .55 )
BG-2D1.6 (1.4 )
BG-3D0.0 75J (0.058 J)
C-2D0.7 4 (0 .8 )
GWA-10 BRU0.4 J (˂1U)
GWA-11 D˂2 U (˂2U)
GWA-12 D0.6 1 (0.46 )
GWA-1BRU0.2 2 (0.27 )
GWA-20 D˂2 U (˂2 U)
GWA-21 D0.3 5 (0.22 )
GWA-22 D0.11 (0.089J)GWA-23 D0.7 7 (0.7 )
GWA-3D˂2 U (˂2 U)
GWA-4D5.6 (4.5 )
GWA-5D0.7 6 (0.72 )
GWA-6D2.6 (2.2 )
GWA-7D0.3 3 (0.29 )
GWA-8D0.0 98J (0.097 J)
GWA-9D0.0 53J (0.045J)
MW-15D˂1 U (˂1 U)
MW-1D0.0 48J (0.044 J)
MW-2D1.2 (0.11 )
MW-3D0.0 54J (0.062 J)MW-4D0.0 48J (˂0.1 U)
MW-5D0.0 8J (0 .0 74J)
MW-6D0.0 42J (˂0.1 U)
MW-7D˂0 .1 U (˂0 .1 U)
MW-9D0.1 8 (0.4 )
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
ARSENIC ISOCONCENTRAT ION CONTOUR MA P - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.5
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR ARSENIC IS 10 µg/L• 1.4J(1.8J) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR1.1 (0.99 )
BG-2B R0.4 9 (0 .5 )
BG-5B R0.3 7 (0 .42 )
GWA-20 BR˂1 U (˂1 U)
GWA-21 BR˂1 U (˂1 U)
GWA-22 BR-A1.3 (1.2 )
GWA-23 BR˂1 U (˂1 U)
GWA-2BR1.1 (0.93 )
GWA-4BR˂1 U (˂1 U)
GWA-7BR0.1 (0.11 )
MW-15BR0.0 43J (˂0.1 U)
MW-7BR˂2 U (˂2 U)
MW-9BR˂0 .1 U (˂1 U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
ARSENIC ISOCONCENTRAT ION CONTOUR MA P - BED ROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.6
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR ARSENIC IS 10 µg/L• 1.4J(1.8J) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
4 4
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S˂0.1U (˂0.1U)
AB-4S˂0.1U (˂0.1U)
AB-5S˂1U (˂1U)
AB-5SL˂1U (˂1U)
AB-7S˂0.1U (˂0.1U)C-1S1 (1.4 )
AB-1 S˂0 .1 U (˂0.1 U)
AB-2 S˂0 .1 U (˂0.1 U)
AB-6 S0.0 3J (˂0 .1 U)
AB-7 I0.0 38J (0.02J)
AB-8 S0.5 6 (0 .32 )
BG-1S0.0 99J+ (˂0 .1 U)
BG-2S0.1 6J+ (0 .1 J+)
BG-3S0.0 3J+ (0 .0 46J+)
C-2S2.1 (2 )
GWA-10 S0.11 (0 .1 4 )
GWA-11 S˂0 .1 U (˂0.1U)
GWA-12 S5.5 (3 .7 )
GWA-14 S0.1 3J+ (0.18 )
GWA-1S˂0 .1 U (˂0 .1 U)
GWA-20 S0.0 28J (0.028 J)
GWA-21 S˂0 .1 U (˂0 .1 U)
GWA-22 S0.0 13J+ (˂0 .1U )GWA-23 S0.0 65J (0.032 J)
GWA-2S˂0 .1 U (˂0 .1 U)
GWA-3S-A˂2 U (˂2 U)
GWA-4S2.9 (4.2J )
GWA-6S0.0 72J+ (0 .1 5 )
GWA-7S˂0 .1 U (˂0 .1 U)
GWA-8S0.2 8 (0.18 )
GWA-9S0.0 21J (0.085 J)
MW-1S˂0 .1 U (˂0 .1 U)
MW-2S0.0 47J (0.078 J)
MW-3S˂0 .1 U (˂0 .1 U)MW-4S0.2 1 (0.38 )MW-5S0.0 92J (0.042 J)
MW-6S˂0 .1 U (˂0 .1 U)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
BERYLLIUM ISOCONCEN TRAT ION CONTOUR MAP - SHA LLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.7
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR BERYLLIUM IS 4 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D˂1 U (˂0.1U)
AB-2 D˂0 .1 U (˂0.1 U)
AB-3 D˂2 U (˂2U)
AB-4 D˂0 .1 U (˂0.1 U)
AB-5 D˂0 .1 U (˂0.1 U)AB-6 BRU˂0 .1 U (0.055 J)
AB-7 D˂0 .1 U (0.032 J)
AB-8 D˂0 .1 U (˂0.1 U)
BG-1D0.0 42J+ (˂0 .1 U)
BG-2D0.0 25J+ (˂0 .1 U)
BG-3D0.0 22J+ (˂0 .1 U)
C-2D˂0 .1 U (˂0.1 U)
GWA-10 BRU˂1 U (˂1 U)
GWA-11 D2.1 (1.3J)
GWA-12 D˂0 .1 U (˂0 .1 U)
GWA-1BRU˂0 .1 U (˂0 .1 U)
GWA-20 D˂2 U (˂2 U)
GWA-21 D0.0 4J (0 .0 4J)
GWA-22 D0.0 55J (˂0 .1 U)
GWA-23 D˂0 .1 U (˂0 .1 U)
GWA-3D˂2 U (˂2 U)
GWA-4D˂1 U (˂1 U)
GWA-5D˂0 .1 U (˂0 .1 U)
GWA-6D˂1 U (˂1 U)
GWA-7D˂0 .1 U (˂0 .1 U)
GWA-8D˂0 .1 U (˂0 .1 U)
GWA-9D˂0 .1 U (˂0 .1 U)
MW-15D˂1 U (˂1 U)
MW-1D˂0 .1 U (0.067J)
MW-2D˂1 U (˂0 .1 U)
MW-3D˂0 .1 U (˂0 .1 U)MW-4D˂0 .1 U (˂0 .1 U)
MW-5D˂0 .1 U (˂0 .1 U)
MW-6D˂0 .1 U (˂0 .1 U)
MW-7D˂0 .1 U (˂0 .1 U)
MW-9D˂0 .1 U (˂0 .1 U)
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
BERYLLIUM ISOCONCEN TRAT ION CONTOUR MAP - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.8
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR BERYLLIUM IS 4 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR˂0 .1 U (0.014 J)
BG-2B R0.0 43J+ (˂0 .1 U)
BG-5B R˂0 .1 U (˂0.1 U)
GWA-20 BR˂1 U (˂1 U)
GWA-21 BR˂1 U (˂1 U)
GWA-22 BR-A˂0 .1 U (˂0 .1 U)
GWA-23 BR0.2 8J (˂1U)
GWA-2BR˂0 .1 U (˂0 .1 U)
GWA-4BR˂1 U (˂1 U)
GWA-7BR˂0 .1 U (˂0 .1 U)
MW-15BR0.1 4 (0.15 )
MW-7BR˂2 U (˂2 U)
MW-9BR˂0 .1 U (˂1 U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
BERYLLIUM ISOCONCEN TRAT ION CONTOUR MAP - BED ROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.9
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR BERYLLIUM IS 4 µg/L• 2J(3.8J) TOTAL CONCENTRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S286 (260 )
AB-4S444 (390 )
AB-5S1,540 (1,400 )
AB-5SL2,160 (1,900 )
AB-7S195 (170 )C-1S258 (240 )
AB-1 S˂5 0U (˂50U )
AB-2 S˂5 0U (˂50U )
AB-6 S35.1J (˂5 0U)
AB-7 I˂5 0U (˂50U )
AB-8 S175 (170 )
BG-1S˂5 0U (˂50U )
BG-2S˂5 0U (˂50U )
BG-3S˂5 0U (˂50U )
C-2S172 (160 )
GWA-10 S160 (1 50 )
GWA-11 S˂5 0U (˂50 U)
GWA-12 S93 (87 )
GWA-14 S˂5 0U (˂50U)
GWA-1S53.2 (46 J)
GWA-20 S˂5 0U (˂50U)
GWA-21 S˂5 0U (˂50U)
GWA-22 S˂5 0U (˂50U)GWA-23 S˂5 0U (˂50U)
GWA-2S434 (4 40 )
GWA-3S-A30.3J (˂50 U)
GWA-4S40.4J (3 7J)
GWA-6S˂5 0U (˂50U)
GWA-7S˂5 0U (˂50U)
GWA-8S231 (2 10 )
GWA-9S159 (1 50 )
MW-1S313 (2 70 )
MW-2S234 (2 00 )
MW-3S327 (2 10 )MW-4S323 (3 00 )MW-5S460 (4 10 )
MW-6S223 (2 00 )
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
BORON ISOCONCENTRATION C ONTOUR MAP - SHALLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.10
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR BORON IS 700 µg/L• 222(337) TOTAL CONCENTRAT ION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D43.7J (43J)
AB-2 D433 (390 )
AB-3 D˂5 0U (˂50U )
AB-4 D˂5 0U (˂50U )
AB-5 D149 (170 )AB-6 BRU462 (420 )
AB-7 D38.2J (˂5 0U)
AB-8 D432 (400 )
BG-1D˂5 0U (˂50U )
BG-2D˂5 0U (˂50U )
BG-3D˂5 0U (˂50U )
C-2D˂5 0U (˂50U )
GWA-10 BRU117 (120 )
GWA-11 D26J (˂50U)
GWA-12 D65 (65 )
GWA-1BRU˂5 0U (˂50U)
GWA-20 D˂5 0U (˂50U)
GWA-21 D˂5 0U (˂50U)
GWA-22 D˂5 0U (˂50U)GWA-23 D˂5 0U (˂50U)
GWA-3D41.5J (3 4J)
GWA-4D26.6J (˂50 U)
GWA-5D˂5 0U (˂50U)
GWA-6D˂5 0U (˂50U)
GWA-7D˂5 0U (˂50U)
GWA-8D93.3 (98 )
GWA-9D268 (2 40 )
MW-15D212 (2 40 )
MW-1D636 (5 70 )
MW-2D˂5 0U (˂50U)
MW-3D279 (2 50 )MW-4D262 (2 50 )MW-5D426 (3 90 )
MW-6D310 (2 90 )
MW-7D˂5 0U (˂50U)
MW-9D˂5 0U (˂50U)
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
BORON ISOCONCENTRATION C ONTOUR MAP - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.11
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR BORON IS 700 µg/L• 222(337) TOTAL CONCENTRAT ION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR˂5 0U (˂50U )
BG-2B R˂5 0U (˂50U )
BG-5B R˂5 0U (˂50U )
GWA-20 BR˂5 0U (˂50U)
GWA-21 BR˂5 0U (˂50U)
GWA-22 BR-A46.4J (4 2J)
GWA-23 BR˂5 0U (˂50U)
GWA-2BR˂5 0U (˂50U)
GWA-4BR˂5 0U (˂50U)
GWA-7BR˂5 0U (˂50U)
MW-15BR268 (2 60 )
MW-7BR˂5 0U (˂50U)
MW-9BR˂5 0U (˂50U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
BORON ISOCONCENTRATION C ONTOUR MAP - BEDROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.12
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR BORON IS 700 µg/L• 222(337) TOTAL CONCENTRAT ION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
7
7
0.7
0.7
0
.
0
7
0
.
0
7
0
.
7
0
.
7
0 .0 7
0 .0 7
0.7
0.7
0.0
7
0.0
7
0.70.70.070.07
0
.
7
0
.
7
0
.
0
7
0
.
0
7
0 .7 0 .7
0.07
0.07
0 .0 7
0 .0 7
0 .0 70.0 7
NC-16
SR-1911
SR-1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S˂0.03U
AB-4S0.016J
AB-5S˂0.03U
AB-5SL˂0.03U
AB-7S˂0.03U
C-1S˂0.03U
AB-1 S˂0 .0 3U
AB-2 S0.0 12J
AB-6 S˂0 .0 3U
AB-7 I0.3
AB-8 S3.7
BG-1S˂0 .0 3U
BG-2S0.1 7
BG-3S0.0 19J
C-2S0.11J+
GWA-10 S0.1 4
GWA-11 S˂0 .0 3U
GWA-12 S3.9
GWA-14 S˂0 .0 3U
GWA-1S2.4
GWA-20 S0.0 14J
GWA-21 S0.0 72J +
GWA-22 S0.0 17JGWA-23 S0.0 13J
GWA-2S0.8 8
GWA-3S-A˂0 .0 3U
GWA-4S0.1 8
GWA-6S0.3 2
GWA-7S0.9 3
GWA-8S9.2 J
GWA-9S0.2 6
MW-1S˂0 .0 3U
MW-2S0.0 45
MW-3S0.0 53 MW-4S0.3 2
MW-5S1.8
MW-6S0.0 53
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
HEXAVALENT CH ROMIUM ISOCONCENTRATION CONTOUR MA P - SH ALLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC DH HS HSL C ON TOUR (DASHED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.13
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC DEPARTMENT OF HEALT H AND HUMAN SERVICES (DHHS) HEALTH SCREENING LEVEL (HSL) F OR HEXAVALEN T CHROMIU M IS 0.07 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
7
7
0
.
7
0
.
7
0 .0 7
0 .0 7
770 .70.70.0 70.0 7
0 .7 0 .70.0 70 .0 7
0.7
0.70.07
0.07
7
7
0 .70.7
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D8.4
AB-2 D1.1
AB-3 D34.3J
AB-4 D1.9
AB-5 D0.9 6AB-6 BRU0.9 6
AB-7 D17.4J
AB-8 D0.0 54
BG-1D0.0 18J-
BG-2D3.7
BG-3D0.0 49
C-2D1.3
GWA-10 BRU˂0 .0 3U
GWA-11 D0.0 76J +
GWA-12 D˂0 .0 3U
GWA-1BRU3UJ
GWA-20 D0.2 9
GWA-21 D0.2 1
GWA-22 D3.8GWA-23 D0.0 53
GWA-3D˂0 .0 3U
GWA-4D0.0 92
GWA-5D4.8 J+
GWA-6D56.1J
GWA-7D1.4
GWA-8D0.0 17J
GWA-9D0.0 4
MW-15D0.3 2J+
MW-1D0.4 9
MW-2D0.5 8J-
MW-3D1.4 MW-4D0.5 8
MW-5D1.5
MW-6D0.0 57
MW-7D1.2
MW-9D21.2J
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
HEXAVALENT CH ROMIUM ISOCONCENTRATION CONTOUR MA P - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC DH HS HSL C ON TOUR (DASHED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.14
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC DEPARTMENT OF HEALT H AND HUMAN SERVICES (DHHS) HEALTH SCREENING LEVEL (HSL) F OR HEXAVALEN T CHROMIU M IS 0.07 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
7
7
0 .7
0 .70
.
0
7
0
.
0
7
770.70.70.070.07
0 .7 0 .7
0 .0 7
0 .0 7
0 .7 0 .70.0 70.0 7
0 .0 70.0 7
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR0.0 25J+
BG-2B R0.0 29J
BG-5B R0.1 7
GWA-20 BR12.4J
GWA-21 BR0.3 4
GWA-22 BR-A3.5
GWA-23 BR2.4
GWA-2BR0.0 79
GWA-4BR15.6J
GWA-7BR2.5
MW-15BR5.5
MW-7BR18.5J+
MW-9BR0.1 4
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
HEXAVALENT CH ROMIUM ISOCONCENTRATION CONTOUR MA P - BEDROC K WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC DH HS HSL C ON TOUR (DASHED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.15
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC DEPARTMENT OF HEALT H AND HUMAN SERVICES (DHHS) HEALTH SCREENING LEVEL (HSL) F OR HEXAVALEN T CHROMIU M IS 0.07 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S0.48J+ (0.36J+)
AB-4S0.95J+ (0.33J)
AB-5S˂5U (˂5U)
AB-5SL˂5U (˂5U)
AB-7S0.77J+ (0.52J+)C-1S1.1 (1.2J+)
AB-1 S1.3 J+ (0.53 )AB-2 S0.9 J+ (0.72 )
AB-6 S5.9 (0.16J)
AB-7 I2.5 J+ (0.63 J+)
AB-8 S4 (3.7J+)
BG-1S0.3 3J+ (0 .3 8J+)
BG-2S0.5 J+ (0.46 J+)
BG-3S0.5 6J+ (0 .3 2J+)
C-2S0.4 8J+ (0 .3 4J+)
GWA-10 S0.5 J+ (0.25J)
GWA-11 S3.4 (0.52 )
GWA-12 S7.9 (3.9 )
GWA-14 S0.3 6J+ (0.14 J+)
GWA-1S4.2 (4.6 )
GWA-20 S0.4 8J+ (0.58 J+)
GWA-21 S2.8 J+ (0.66J+)
GWA-22 S0.5 1J+ (0.19 J)GWA-23 S0.4 J+ (0.34J+)
GWA-2S1.8 J+ (1.2J+)
GWA-3S-A˂1 0U (10U J)
GWA-4S˂5 U (˂5 U)
GWA-6S2.9 J+ (1.6 )
GWA-7S1.9 J+ (1.1 )
GWA-8S6.9 (6.7 )
GWA-9S0.6 6J+ (0.69 )
MW-1S0.2 4J+ (0 .31 J)
MW-2S0.2 J+ (0.15J+)
MW-3S0.2 9J+ (0 .33 J+)MW-4S4.3 J+ (5.3 )MW-5S2.1 J+ (1.9 )
MW-6S0.2 9J+ (0 .42 J)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
CHROMIUM (TOTAL) ISOCON CEN TRAT ION CONTOUR MAP - SHAL LOW WEL LS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.16
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR CHROMIU M (TOTAL) IS 10 µg/L• 2.1J(1J+) TOTAL CONCENTRATION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
1 0 0100
1010
5 050
1 010
5
0
5
0
1010
1 0 1 0
1 010
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D11.4 (8.2 )
AB-2 D2.2 J+ (1.6 )
AB-3 D39.5 (30 .2 )
AB-4 D2.7 (2J+)
AB-5 D3J+ (1.4J+)AB-6 BRU31.8 (23 .6 )
AB-7 D20.1 (22 .3 )
AB-8 D1.2 J+ (1J+)
BG-1D1.2 J+ (0.65 J+)
BG-2D4.9 (4.4 )
BG-3D0.3 8J+ (0 .3 4J+)
C-2D1.6 J+ (1.5 )
GWA-10 BRU5UJ (˂5U)
GWA-11 D˂1 0U (˂10 U)
GWA-12 D0.4 8J+ (0.53 )
GWA-1BRU0.4 7J+ (0.22 J+)
GWA-20 D160 (14 4 )
GWA-21 D29.1 (28 .4 )
GWA-22 D19.6 (12 .1 )GWA-23 D23.7 (7 .6 )
GWA-3D˂1 0U (10UJ)
GWA-4D0.9 2J+ (˂5U)
GWA-5D8.6 (6.6 )
GWA-6D55.1 (45 .4 )
GWA-7D3 (2.5 )
GWA-8D2.4 J+ (2.1 )
GWA-9D5.6 (0.36J)
MW-15D1.1 J+ (2.1J+)
MW-1D0.8 8J+ (0 .61 )
MW-2D32.8 (0.8 7J+)
MW-3D1.8 J+ (1.8 )MW-4D1.1 J+ (1 )
MW-5D2J+ (2 )
MW-6D1.3 J+ (0.19J)
MW-7D1.3 J+ (1J+)
MW-9D22.8 (19 .3 )
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
CHROMIUM (TOTAL) ISOCON CEN TRAT ION CONTOUR MAP - D EEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.17
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR CHROMIU M (TOTAL) IS 10 µg/L• 2.1J(1J+) TOTAL CONCENTRATION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
1 01 0
1 01 0
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR0.2 2J+ (0 .3 3J+)
BG-2B R0.3 5J+ (0 .3 8J+)
BG-5B R1.2 J+ (0.76 J+)
GWA-20 BR41.4 (12 .9 )
GWA-21 BR6.9 (1.4J+)
GWA-22 BR-A12.5 (5 )
GWA-23 BR11.1 (0.97 J)
GWA-2BR3.3 J+ (0.6J+)
GWA-4BR15.4 (14 .9 )
GWA-7BR3.4 (2.9 )
MW-15BR4.7 (4.5 )
MW-7BR20.1 (21 .3 )
MW-9BR0.7 8J+ (5 J+)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
CHROMIUM (TOTAL) ISOCON CEN TRAT ION CONTOUR MAP - B EDR OCK WEL LS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.18
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR CHROMIU M (TOTAL) IS 10 µg/L• 2.1J(1J+) TOTAL CONCENTRATION (DISSOLVED C ONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
1
0
1
0
11
5 050101011
5 0 5 0
1 0 1 0 1 1
1 01 0
11
1 0 1 0
1 1
5 0 5 0
11
1 01 0
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S0.84 (0.71 )
AB-4S16.5 (13.9 )
AB-5S1.2 (1 )
AB-5SL0.11J (˂1U)
AB-7S24.1 (24.5 )C-1S128 (148 )
AB-1 S14 (14 .1 )AB-2 S16.4 (15 .6 )
AB-6 S3.8 (0.46 )
AB-7 I1.3 (0.65 )
AB-8 S0.2 5 (0 .22 J+)
BG-1S0.4 2 (0 .48 )
BG-2S0.2 2 (0 .24 )
BG-3S0.7 5 (0 .81 )
C-2S39.4 (38 .6 )
GWA-10 S10.6 (10 .5 )
GWA-11 S5.9 (6.6 )
GWA-12 S50.5 (49 .4 )
GWA-14 S2 (2 )
GWA-1S0.2 8 (0.26 )
GWA-20 S1.3 (1.3 )
GWA-21 S1.7 (1.6 )
GWA-22 S0.8 9 (0.88 )GWA-23 S4.1 (4.2 )
GWA-2S0.5 3 (0.01 5J)
GWA-3S-A5.9 (6.7 )
GWA-4S49.8 (51 )
GWA-6S13.5 (13 .3 )
GWA-7S0.1 2J+ (0.12 )
GWA-8S78.9 (80 .2 )
GWA-9S48.7 (47 )
MW-1S60.1 (60 .5 )
MW-2S19 (17 .8 )
MW-3S0.7 1 (0.86 )MW-4S13.1 (16 .1 )MW-5S1.8 (1.8 )
MW-6S0.2 2 (0.22 )
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
COBA LT ISOCONCENTRATION CONTOUR MAP - SHALLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.19
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR COBALT IS 1 µg/L• 0.24(0.190) TOTAL CON CEN TRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
1
0
1
0
1
1
11
11
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D0.1 6J (0.021J)
AB-2 D0.3 5 (0 .16 )
AB-3 D˂2 U (˂2U)
AB-4 D0.2 3 (0 .01 2J)
AB-5 D0.0 89J (0.016 J)AB-6 BRU0.5 9 (0 .59 )
AB-7 D0.1 4J+ (0 .4 1 )
AB-8 D0.5 4 (0 .51 )
BG-1D0.6 1 (0 .64 )
BG-2D0.0 4J+ (0 .0 41J+)
BG-3D0.7 9 (0 .24 )
C-2D0.0 28J+ (0.028 J)
GWA-10 BRU˂1 U (˂1 U)
GWA-11 D10.5 (9.7 )
GWA-12 D9.3 J (11 .2 )
GWA-1BRU0.1 7 (0.09 7J+)
GWA-20 D0.6 4J (0 .3 2J)
GWA-21 D5.3 (0 .5 6 )
GWA-22 D0.5 4 (0.24 )GWA-23 D0.1 8 (0.05 6J)
GWA-3D1.6 J (1.5J )
GWA-4D˂1 U (˂1 U)
GWA-5D1.9 (0 .2 9 )
GWA-6D0.1 3J+ (˂1U)
GWA-7D0.0 53J+ (0 .0 97J)
GWA-8D0.0 81J+ (0 .0 92J)
GWA-9D0.1 3 (0.14 )
MW-15D˂1 U (˂1 U)
MW-1D0.3 6 (0.28 )
MW-2D1.2 (0.0 12J)
MW-3D0.0 5J (0 .0 23J)MW-4D0.6 (0.6 )
MW-5D0.0 49J (0.049 J)
MW-6D0.0 89J (0.037 J)
MW-7D0.0 2J (˂0 .1U )
MW-9D0.0 47J (0.019 J+)
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
COBA LT ISOCONCENTRATION CONTOUR MAP - DEEP WELL S (D )
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.20
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR COBALT IS 1 µg/L• 0.24(0.190) TOTAL CON CEN TRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
11
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR0.0 34J+ (0.041 J)
BG-2B R0.5 2 (0 .39 )
BG-5B R0.0 9J (0.076J)
GWA-20 BR0.8 2J+ (˂1U)
GWA-21 BR0.2 2J (0 .1 4J)
GWA-22 BR-A0.2 2 (0.04 8J)
GWA-23 BR0.4 2J (0 .1 2J)
GWA-2BR0.0 88J+ (0 .0 51J)
GWA-4BR˂1 U (˂1 U)
GWA-7BR0.0 1J+ (0.02 2J)
MW-15BR1.5 (2.1 )
MW-7BR0.2 2J (˂2 U)
MW-9BR˂0 .1 U (˂1 U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
COBA LT ISOCONCENTRATION CONTOUR MAP - BEDROCK WELLS (BR )
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.21
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR COBALT IS 1 µg/L• 0.24(0.190) TOTAL CON CEN TRATION (D ISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River 1 0 0 0 0100005000500010001000
3 0 0 3 0 0
1000
1000
3
0
0
3
0
0
10001000
300300
1 0 0 0100 0
3 0 03 0 0
3 0 0300
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S7,140 (6,200 )
AB-4S83.7 (˂50U)
AB-5S46.9J (˂50U)
AB-5SL˂50U (˂50U)
AB-7S3,280 (2,300 )C-1S66,200J+ (63,300 )
AB-1 S834 (˂5 0U)AB-2 S142 (43J)
AB-6 S4,9 90 (39J)
AB-7 I670 (˂5 0U)
AB-8 S59.8 (˂50 U)
BG-1S˂5 0U (˂50U )
BG-2S26.2J (˂5 0U)
BG-3S1,0 90 (73 0 )
C-2S70 (˂50 U)
GWA-10 S446 (33 0 )
GWA-11 S1,3 00 (˂50U)
GWA-12 S380 (1 30 )
GWA-14 S45J (˂50 U)
GWA-1S343 (5 1 )
GWA-20 S93.9 (˂50U)
GWA-21 S75 (˂50U)
GWA-22 S26.4J (˂50 U)GWA-23 S228J (45 0 )
GWA-2S682 (˂50 U)
GWA-3S-A2,0 20 (1,60 0 )
GWA-4S˂5 0U (˂50U)
GWA-6S121 (99 )
GWA-7S32.6J (˂50 U)
GWA-8S˂5 0U (˂50U)
GWA-9S˂5 0U (˂50U)
MW-1S29,500 (25 ,3 00 )
MW-2S˂5 0U (˂50U)
MW-3S130 (5 2 )MW-4S1,2 10 (300 )MW-5S46.4J (˂5 0U)
MW-6S161 (8 2 )
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
IRON ISOCONCEN TRAT ION CONTOUR MAP - SHA LLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.22
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR IRON IS 300 µg/L• 65.1(31.5J) TOTAL CONCENTRAT ION (DISSOLVED CONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
1000
1000
3
0
0
3
0
0
1 0 0 01000
3 0 03 0 0
1
0
0
0
1
0
0
0
3
0
0
3
0
0
3 0 030 0
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D28J (˂5 0U)
AB-2 D258 (˂5 0U)
AB-3 D45.8J (˂5 0U)
AB-4 D305 (˂5 0U)
AB-5 D40.9J (˂5 0U)AB-6 BRU368 (180 )
AB-7 D163 (170 )
AB-8 D300 (170 )
BG-1D35.5J (˂5 0U)
BG-2D˂5 0U (˂50U )
BG-3D˂5 0U (˂50U )
C-2D25.8J (˂5 0U)
GWA-10 BRU˂5 0U (˂50U)
GWA-11 D270 (9 1 )
GWA-12 D1,1 00 (1,30 0 )
GWA-1BRU135 (5 0 )
GWA-20 D˂5 0U (˂50U)
GWA-21 D5,9 30J + (1 90 )
GWA-22 D259 (2 7J)GWA-23 D38.2J (˂50 U)
GWA-3D294 (2 10 )
GWA-4D68.2 (˂50U)
GWA-5D1,5 30 (8 2 )
GWA-6D111 (˂50 U)
GWA-7D32.8J (4 4J)
GWA-8D70 (˂50U)
GWA-9D54.4 (˂50U)
MW-15D˂5 0U (˂50U)
MW-1D˂5 0U (˂50U)
MW-2D87.8 (˂50U )
MW-3D36.1J (˂5 0U)MW-4D247 (1 20 )MW-5D˂5 0U (˂50U)
MW-6D102 (˂5 0U)
MW-7D˂5 0U (˂50U)
MW-9D83.1 (˂50U )
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
IRON ISOCONCEN TRAT ION CONTOUR MAP - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.23
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR IRON IS 300 µg/L• 65.1(31.5J) TOTAL CONCENTRAT ION (DISSOLVED CONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR62.8 (˂50 U)
BG-2B R113 (36 J)
BG-5B R41.2J (˂5 0U)
GWA-20 BR141J (190 )
GWA-21 BR72.5 (˂50U)
GWA-22 BR-A74.9 (˂50U)
GWA-23 BR78.2 (˂50U)
GWA-2BR57.1 (˂50U)
GWA-4BR˂5 0U (˂50U)
GWA-7BR˂5 0U (˂50U)
MW-15BR81.2 (92 )
MW-7BR˂5 0U (˂50U)
MW-9BR˂5 0U (˂50U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
IRON ISOCONCEN TRAT ION CONTOUR MAP - BED ROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.24
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR IRON IS 300 µg/L• 65.1(31.5J) TOTAL CONCENTRAT ION (DISSOLVED CONCENTR ATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
5 0 0 05 0 0 0
5 0 050 0
5 0 0
5 0 0
5050
5 0
5 0
5 050
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S693 (620 )
AB-4S1,750 (1,500 )
AB-5S90.3 (86 )
AB-5SL5.6 (4.1J)
AB-7S1,880 (1,700 )C-1S2,910 (3,000 )
AB-1 S193 (18 0 )AB-2 S353 (34 0 )
AB-6 S244 (18 0 )
AB-7 I119 (76 )
AB-8 S147 (13 0 )
BG-1S38.7 (4 2 )
BG-2S318 (34 0 )
BG-3S434 (47 0 )
C-2S546 (50 0 )
GWA-10 S233 (23 0 )
GWA-11 S4,8 00 (˂5U)
GWA-12 S3,6 00 (3,40 0 )
GWA-14 S84 (91 )
GWA-1S14.4 (4.8J)
GWA-20 S53.2 (4 8 )
GWA-21 S198 (17 0 )
GWA-22 S33.8 (29 )GWA-23 S111 (13 0 )
GWA-2S44.3 (12 )
GWA-3S-A12,700 (12 ,7 00 )
GWA-4S795 (73 0 )
GWA-6S843 (78 0 )
GWA-7S4.2 J (3.7J)
GWA-8S687 (66 0 )
GWA-9S2,6 30 (2,60 0J-)
MW-1S2,7 30 (2,40 0 )
MW-2S271 (24 0 )
MW-3S8.4 (20 0 )MW-4S253 (27 0 )MW-5S23.5 (24 )
MW-6S45.7 (45 )
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
MANGA NESE ISOCONCENTRAT ION CONTOUR MA P - SHA LLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.25
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR MANGANESE IS 50 µg/L• 39.5(45.3) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
5 0 0500
5 050
5 05 0
5 050
5 050
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D˂5 U (˂5U)
AB-2 D54.3 (45 )
AB-3 D˂5 U (˂5U)
AB-4 D8.3 (˂5U)
AB-5 D˂5 U (˂5U)AB-6 BRU11.1 (7.1 )
AB-7 D12.2 (11 )AB-8 D102 (91 )
BG-1D˂5 U (˂5U)
BG-2D˂5 U (˂5U)
BG-3D6.2 (˂5U)
C-2D3.7 J (2 .8 J)
GWA-10 BRU˂5 U (˂5 U)
GWA-11 D81 (76 )
GWA-12 D2,3 00 (2,30 0 )
GWA-1BRU28.9 (20 )
GWA-20 D˂5 U (˂5 U)
GWA-21 D140 (1 7 )
GWA-22 D13.7 (3.3J)GWA-23 D˂5 U (˂5 U)
GWA-3D11,800 (13 ,4 00 )
GWA-4D˂5 U (˂5 U)
GWA-5D105 (8 )
GWA-6D3J (˂5U)
GWA-7D˂5 U (2.6 J)
GWA-8D13.1 (14 )
GWA-9D22.3 (21 )
MW-15D˂5 U (˂5 U)
MW-1D475 (42 0 )
MW-2D4.4 J (˂5U)
MW-3D˂5 U (˂5 U)MW-4D19.1 (19 )MW-5D5.9 (5.5 )
MW-6D7.7 (6.8 )
MW-7D˂5 U (˂5 U)
MW-9D3.1 J (˂5U)
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
MANGA NESE ISOCONCENTRAT ION CONTOUR MA P - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.26
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR MANGANESE IS 50 µg/L• 39.5(45.3) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
5 05 0
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR˂5 U (˂5U)
BG-2B R10.6 (1 2 )
BG-5B R13.1 (1 0.4 )
GWA-20 BR˂5 U (˂5 U)
GWA-21 BR3.7 J (˂5U)
GWA-22 BR-A˂5 U (˂5 U)
GWA-23 BR˂5 U (˂5 U)
GWA-2BR22.7 (20 )
GWA-4BR˂5 U (˂5 U)
GWA-7BR˂5 U (˂5 U)
MW-15BR59 (84 )
MW-7BR˂5 U (˂5 U)
MW-9BR˂5 U (˂5 U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
MANGA NESE ISOCONCENTRAT ION CONTOUR MA P - BED ROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.27
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR MANGANESE IS 50 µg/L• 39.5(45.3) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
5 0 0 0 0 0500000
250000
250000
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S60,300
AB-4S90,800
AB-5S143,000
AB-5SL165,000
AB-7S38,400
C-1S410,000J
AB-1 S750J
AB-2 S37,400
AB-6 S16,100
AB-7 I12,000
AB-8 S97,600
BG-1S760J
BG-2S1,7 00
BG-3S1,9 00
C-2S60,000
GWA-10 S34,200
GWA-11 S75,600
GWA-12 S239,00 0
GWA-14 S2,1 00J+
GWA-1S1,4 00
GWA-20 S780J
GWA-21 S˂1 ,0 00U
GWA-22 S˂1 ,0 00UGWA-23 S790J
GWA-2S35,700
GWA-3S-A1,5 80,00 0J
GWA-4S394,00 0
GWA-6S750J
GWA-7S˂1 ,0 00U
GWA-8S39,000
GWA-9S25,500
MW-1S1,0 00
MW-2S51,700
MW-3S28,300 MW-4S26,800
MW-5S14,500
MW-6S38,400
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
SUL FATE ISOCON CENT RATION CONTOU R MAP - SHAL LOW WEL LS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.28
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR SULFAT E IS 250,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
500000500000
250000250000
1 0 0 0 0 0 0
1 0 0 0 0 0 0
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D31,100
AB-2 D15,900
AB-3 D120,00 0
AB-4 D7,1 00
AB-5 D62,000AB-6 BRU95,700
AB-7 D34,300AB-8 D129,00 0
BG-1D31,700
BG-2D36,300
BG-3D1,4 00
C-2D2,2 00
GWA-10 BRU20,400
GWA-11 D1,5 50,00 0
GWA-12 D429,00 0
GWA-1BRU11,000
GWA-20 D9,9 00
GWA-21 D18,800
GWA-23 D7,3 00
GWA-3D1,5 80,00 0J
GWA-4D8,9 00
GWA-5D7,6 00
GWA-6D14,800
GWA-7D4,5 00
GWA-8D24,500
GWA-9D32,900
MW-15D35,300
MW-1D93,200
MW-2D1,1 00
MW-3D26,400 MW-4D31,800
MW-5D44,800
MW-6D35,900
MW-7D˂1 ,0 00U
MW-9D37,400
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
SUL FATE ISOCON CENT RATION CONTOU R MAP - D EEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.29
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR SULFAT E IS 250,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR14,800
BG-2B R12,600
BG-5B R26,400
GWA-20 BR19,900
GWA-21 BR9,3 00
GWA-22 BR-A32,600
GWA-23 BR8,4 00
GWA-2BR39,600
GWA-4BR17,400
GWA-7BR4,4 00
MW-15BR28,600
MW-7BR5,5 00J+
MW-9BR15,700
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
SUL FATE ISOCON CENT RATION CONTOU R MAP - B EDR OCK WEL LS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.30
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR SULFAT E IS 250,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
1 0 0 0 0 0 01000000
5 0 0 0 0 0500000
5 0 0 0 0 0500000
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S175,000
AB-4S169,000
AB-5S515,000
AB-5SL298,000
AB-7S158,000
C-1S671,000
AB-1 S˂2 5,000U
AB-2 S93,000
AB-6 S97,000
AB-7 I34,000
AB-8 S167,00 0
BG-1S˂2 5,000U
BG-2S142,00 0J+
BG-3S78,000
C-2S141,00 0
GWA-10 S77,000 J+
GWA-11 S317,00 0J+
GWA-12 S385,00 0
GWA-14 S39,000 J+
GWA-1S74,000
GWA-20 S32,000
GWA-21 S˂2 5,000U
GWA-22 S˂2 5,000UGWA-23 S˂2 5,000U
GWA-2S135,00 0
GWA-3S-A2,1 90,00 0
GWA-4S588,00 0
GWA-6S˂2 5,000U
GWA-7S34,000
GWA-8S60,000
GWA-9S37,000
MW-1S37,000
MW-2S86,000
MW-3S126,00 0 MW-4S114,00 0J+
MW-5S60,000 J+
MW-6S96,000 J+
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
TOTAL DISSOLVED SOL IDS ISOCONCENTRATION CONTOUR MA P - SHA LLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.31
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR TDS IS 500,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
2 0 0 0 0 0 0
2 0 0 0 0 0 0
1 0 0 0 0 0 0
1 0 0 0 0 0 0
5 0 0 0 0 0
5 0 0 0 0 0
2 0 0 0 0 0 0
2 0 0 0 0 0 0
1 0 0 0 0 0 0
1 0 0 0 0 0 0
5 0 0 0 0 0
5 0 0 0 0 0
5 0 0 0 0 0500000
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D366,00 0
AB-2 D180,00 0
AB-3 D950,00 0
AB-4 D112,00 0
AB-5 D311,00 0AB-6 BRU210,00 0
AB-7 D147,00 0AB-8 D295,00 0
BG-1D414,00 0
BG-2D219,00 0J+
BG-3D90,000 J+
C-2D138,00 0
GWA-10 BRU336,00 0J+
GWA-11 D3,2 40,00 0
GWA-12 D748,00 0
GWA-1BRU116,00 0
GWA-20 D3,1 20,00 0
GWA-21 D117,00 0
GWA-22 D92,000GWA-23 D141,00 0
GWA-3D2,110,00 0
GWA-4D195,00 0
GWA-5D113,00 0
GWA-6D189,00 0
GWA-7D103,00 0
GWA-8D126,00 0
GWA-9D51,000
MW-15D281,00 0
MW-1D177,00 0
MW-2D77,000
MW-3D121,00 0 MW-4D89,000 J+MW-5D175,00 0J+
MW-6D122,00 0J+
MW-7D32,000
MW-9D183,00 0
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
TOTAL DISSOLVED SOL IDS ISOCONCENTRATION CONTOUR MA P - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.32
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR TDS IS 500,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
500000500000
5 0 0 0 0 0
5 0 0 0 0 0
1 0 0 0 0 0 0
1 0 0 0 0 0 0
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR129,00 0
BG-2B R156,00 0
BG-5B R197,00 0
GWA-20 BR261,00 0
GWA-21 BR1,3 40,00 0
GWA-22 BR-A120,00 0
GWA-23 BR˂2 50,000 U
GWA-2BR174,00 0
GWA-4BR454,00 0
GWA-7BR84,000
MW-15BR78,000
MW-7BR1,3 20,00 0
MW-9BR366,00 0
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
TOTAL DISSOLVED SOL IDS ISOCONCENTRATION CONTOUR MA P - BED ROCK WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
NC 2L STAND ARD CONTOUR (DASH ED WHEREINFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.33
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER NC 2L STANDARD FOR TDS IS 500,000 µg/L• RESULTS ARE TOTAL RECOVERABLE CONCENTR ATIONS. DISSOLVED CONCENTRATION S WERE N OT ANALYZED FOR
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<&<
Catawba River
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S˂0.1U (˂0.1U)
AB-4S0.22 (0.19 )
AB-5S0.45J (0.37J)
AB-5SL˂1U (˂1U)
AB-7S1 (0.98 )C-1S0.53 (0.57 )
AB-1 S˂0 .1 U (˂0.1 U)
AB-2 S0.0 37J (˂0.1U)
AB-6 S0.0 55J (0.028 J)
AB-7 I0.0 35J+ (˂0 .1 U)
AB-8 S˂0 .1 U (˂0.1 U)
BG-1S˂0 .1 U (˂0.1 U)
BG-2S˂0 .1 U (˂0.1 U)
BG-3S˂0 .1 U (˂0.1 U)
C-2S0.0 65J (0.064 J)
GWA-10 S˂0 .1 U (˂0 .1U )
GWA-11 S˂0 .1 U (˂0.1U)
GWA-12 S0.0 18J (0.015 J)
GWA-14 S˂0 .1 U (0.0 23J)
GWA-1S˂0 .1 U (˂0 .1 U)
GWA-20 S˂0 .1 U (˂0 .1 U)
GWA-21 S0.0 41J (0.032 J)
GWA-22 S˂0 .1 U (˂0 .1 U)GWA-23 S˂0 .1 U (˂0 .1 U)
GWA-2S˂0 .1 U (˂0 .1 U)
GWA-3S-A˂2 U (˂2 U)
GWA-4S˂1 U (˂1 U)
GWA-6S0.0 25J (0.037 J)
GWA-7S˂0 .1 U (˂0 .1 U)
GWA-8S0.0 24J (˂0 .1 U)
GWA-9S˂0 .1 U (˂0 .1U )
MW-1S˂0 .1 U (˂0 .1 U)
MW-2S0.0 89J (0.086 J)
MW-3S˂0 .1 U (˂0 .1 U)MW-4S0.0 35J (0.032 J)MW-5S˂0 .1 U (˂0 .1 U)
MW-6S˂0 .1 U (˂0 .1 U)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
THALLIUM ISOCONCENTRATION CONTOUR MA P - SH ALLOW WELLS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.34
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR THALLIUM IS 0.2 µg/L• 0.018J(0.067J) TOTAL CONCENTRATION (DISSOLVED CONCENTRAT ION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
Catawba River
2 2 0 .2 0 .2
0.20.2
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D˂1 U (˂0.1U)
AB-2 D˂0 .1 U (˂0.1 U)
AB-3 D˂2 U (˂2U)
AB-4 D˂0 .1 U (˂0.1 U)
AB-5 D˂0 .1 U (˂0.1 U)AB-6 BRU˂0 .1 U (˂0.1 U)
AB-7 D˂0 .1 U (˂0.1 U)
AB-8 D˂0 .1 U (˂0.1 U)
BG-1D˂0 .1 U (˂0.1 U)
BG-2D˂0 .1 U (˂0.1 U)
BG-3D˂0 .1 U (˂0.1 U)
C-2D˂0 .1 U (˂0.1 U)
GWA-10 BRU˂1 U (˂1 U)
GWA-11 D1J (˂2 U)
GWA-12 D˂0 .1 U (˂0 .1 U)
GWA-1BRU˂0 .1 U (˂0 .1 U)
GWA-20 D2.4 (2.6 )
GWA-21 D˂0 .1 U (˂0 .1 U)
GWA-22 D˂0 .1 U (˂0 .1 U)GWA-23 D˂0 .1 U (˂0 .1 U)
GWA-3D˂2 U (˂2 U)
GWA-4D˂1 U (˂1 U)
GWA-5D˂0 .1 U (˂0 .1 U)
GWA-6D˂1 U (˂1 U)
GWA-7D˂0 .1 U (˂0 .1 U)
GWA-8D˂0 .1 U (˂0 .1 U)
GWA-9D˂0 .1 U (˂0 .1 U)
MW-15D˂1 U (˂1 U)
MW-1D0.0 67J (0.049 J)
MW-2D˂1 U (˂0 .1 U)
MW-3D˂0 .1 U (˂0 .1 U)MW-4D˂0 .1 U (˂0 .1 U)
MW-5D˂0 .1 U (˂0 .1 U)
MW-6D˂0 .1 U (˂0 .1 U)
MW-7D˂0 .1 U (˂0 .1 U)
MW-9D˂0 .1 U (˂0 .1 U)
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
THALLIUM ISOCONCENTRATION CONTOUR MA P - DEEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.35
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR THALLIUM IS 0.2 µg/L• 0.018J(0.067J) TOTAL CONCENTRATION (DISSOLVED CONCENTRAT ION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR˂0 .1 U (˂0.1 U)
BG-2B R˂0 .1 U (˂0.1 U)
BG-5B R˂0 .1 U (˂0.1 U)
GWA-20 BR˂1 U (˂1 U)
GWA-21 BR˂1 U (˂1 U)
GWA-22 BR-A˂0 .1 U (˂0 .1 U)
GWA-23 BR˂1 U (˂1 U)
GWA-2BR˂0 .1 U (˂0 .1 U)
GWA-4BR˂1 U (˂1 U)
GWA-7BR˂0 .1 U (˂0 .1 U)
MW-15BR˂0 .1 U (˂0 .1 U)
MW-7BR˂2 U (˂2 U)
MW-9BR˂0 .1 U (˂1 U)
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
THALLIUM ISOCONCENTRATION CONTOUR MA P - BEDROC K WELLS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.36
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR THALLIUM IS 0.2 µg/L• 0.018J(0.067J) TOTAL CONCENTRATION (DISSOLVED CONCENTRAT ION )
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
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&<
&<
&<
&<
&<
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&<
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&<
&<
&<&<
&<&<
&<
&<
&<
&<
&<
&<
&<
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&<
&<
&<
&<
&<
&<
&<
&<
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&<
&<&<
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Catawba River
1 0 1 03
3
0.30.3
0.30.3
0 .30.3
0.30.3
NC-16
SR-1911
S R -1912
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3S0.57 (0.17J)
AB-4S38 (38.7 )
AB-5S183 (168 )
AB-5SL107 (93.3 )
AB-7S4.3 (3.9 )C-1S2.3 (2.9 )
AB-1 S1.9 (0.12J)
AB-2 S0.2 6J (˂0 .3 U)
AB-6 S22 (5.9 )
AB-7 I0.9 4 (0.076 J)
AB-8 S0.2 J (0 .0 76J)
BG-1S˂0 .3 U (˂0.3 U)
BG-2S0.0 97J (0.075 J)
BG-3S0.1 7J (0.15J)
C-2S0.1 6J (˂0 .3 U)
GWA-10 S0.2 7J (0 .0 78J)
GWA-11 S2 (˂0 .5 U)
GWA-12 S0.7 3 (0 .1 7J)
GWA-14 S0.0 91J (˂0 .3 U)
GWA-1S2.2 (1.7 )
GWA-20 S0.1 9J (˂0.3U)
GWA-21 S0.1 8J (0.11 J)
GWA-22 S0.0 97J (˂0 .3 U)GWA-23 S˂0 .3 U (˂0 .3 U)
GWA-2S3.9 (1.1 )
GWA-3S-A1.7 J (1.9J )
GWA-4S˂3 U (˂3 U)
GWA-6S0.2 J (˂0.3U)
GWA-7S0.5 (0.44 )
GWA-8S˂0 .3 U (˂0 .3 U)
GWA-9S0.1 2J (˂0.3U)
MW-1S˂0 .3 U (˂0 .3 U)
MW-2S˂0 .3 U (˂0 .3 U)
MW-3S0.3 5 (0.46 )MW-4S2.8 (5.9 )MW-5S0.1 6J (0 .0 76J)
MW-6S0.2 5J (0 .1 9J)
AS-1 SNS
AS-2 SNS AS-3 SNS
BG-4SNS
GWA-13 SNS
GWA-15 SNS
GWA-5SNS
MW-2S-ANS
OB -1NS OB -2NS
MW-10NS
MW-11S RNS
MW-12SNS
MW-13SNS
MW-14SNS
MW-15SNS
MW-7SNS
MW-7SRNS
MW-8INSMW-8SNS
MW-9NS
VANADIU M ISOCON CEN TRAT ION CONTOUR MAP - SHAL LOW WEL LS (S)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.37
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR VANADIUM IS 0.3 µg/L• 15(17.2) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
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&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
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&<
&<
&<
&<
Catawba River
1 0 1 0
3 3 0 .3 0 .3
1 01 0330.30.3
1
0
1
0
3
3
0 .3
0 .3
1010
330.30.3
1 01 0
33
0 .30.3
1 01 0330.3 0 .3
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-1 D10 (9.3 )
AB-2 D6.2 (5.8 )
AB-3 D8.7 (7.7 )
AB-4 D17.5 (16 )
AB-5 D12.6 (11 .6 )AB-6 BRU10.2 (10 .5 )
AB-7 D38.2 (34 .4 )AB-8 D1.5 (1.3 )
BG-1D2.2 (2.3 )
BG-2D20.7 (22 .3 )
BG-3D2.1 (2.5 )
C-2D5.8 (5.8 )
GWA-10 BRU5.2 (4.7 )
GWA-11 D˂1 0U (˂10 U)
GWA-12 D0.6 5 (0.49 J)
GWA-1BRU1 (1.1 )
GWA-20 D˂6 U (˂6 U)
GWA-21 D20.5 (9.2 )
GWA-22 D3.9 (3.6 )GWA-23 D21 (19 .2 )
GWA-3D˂6 U (˂6 U)
GWA-4D14 (12 .4 )
GWA-5D16.5 (15 .7 )
GWA-6D21 (20 .3 )
GWA-7D10.2 (10 .1 )
GWA-8D4.4 (4.1 )
GWA-9D3.5 (3 )
MW-15D3J (2.2J )
MW-1D1.5 (1.5 )
MW-2D33.8 (3.2 )
MW-3D5.2 (5.3 )MW-4D1.2 (1.1 )
MW-5D8 (7.9 )
MW-6D4 (3.3 )
MW-7D0.1 7J (0 .1 6J)
MW-9D14.8 (17 .7 )
AS-1 DNS
AS-2 DNS AS-3 DNS
BG-4DNS
BG-5DNS
C-1B RUNS
GWA-13 DNS
GWA-14 DNS
GWA-15 DNS
GWA-2BRUNS
MW-11DRNS
MW-8DNS
VANADIU M ISOCON CEN TRAT ION CONTOUR MAP - D EEP WELLS (D)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<VOLUNTARY GROUNDWATER MONITORIN G WELLIDENTIFICATION AN D LOCATION
&<COMPLIANCE GROUNDWATER MONITOR ING WELLIDENTIFICATION AN D LOCATION
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.38
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR VANADIUM IS 0.3 µg/L• 15(17.2) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
650
7 1 0
760
7 2 0
690
7
1
0
690
660
750
7 0 0
7 0 0
69 0
7 4 0
710
67 0
6 7 0
740
7 40
720
70 0
6 9 0
720
6 80
7 2 0
75 0
700
700
730
7 5 0
6 8 0
6 6 0
6
7
0
6 9 0
6 9 0
730
7 8 0 710
710
7 6 0
730
650
7 2 0
650
7 5 0
740
720
650
720
680
660
7 0 0670
7 3 0
67
0
7 0 0670
6 7 0
710
7 1 0
7 0 0
7 6 0
7 8 0
6 8 0
7 4 0
720
6 6 0
660
660
7 1 0
680
6 7 0
6 80
7 10
6 8 0
7 1
0
6 9 0
6 6 0
7 1 0
7 1 0
680
6 50
670
7 7 0
720
67 0
670
7 0 0
6 7 0
6
80
730
6 9 0
740
6 8 0
720
7 3 0
7 7 0
680
750
680
6 8 0
7
10
7 60
710
660
70 0
6 6 0
7 7 0
7
10
650
6 9 0
690
6 9 0
7 1 0
72 0
6 6 0
6 7 0
7 0 0
6 8 0
670
750
6 7 0
650
700
7 1 0
780680 780
740
760
7 0 0
720
7 3 0
740
700
6 5 0
6 7 0
670
7 1 0
6 9 0
720
710 70 0
700
6 60
6 5 0
7
2
0
710
6 6 0
690
670
680
71 0
6 8 0
6 8 0
680
670
6 9 0
770
650
7 2 0
&<
&<
&<
&<
&<
&<
&<
&<
&<&<
&<
&<
&<
&<
&<
&<
Catawba River
1 0 1 0330.3 0 .3
1 010330.30.3
33
0.30.3
33
0.3
0.3
0 .30.3
0 .30.3
NC-16
SR-1911
S R -1 9 1 2
U N N A M E D
S T R E A M
UNNAME DSTREAM
AB-3 BR15.8 (14 .8 )
BG-2B R1.2 (1.3 )
BG-5B R1.2 (1.3 )
GWA-20 BR4.2 J+ (3.6 )
GWA-21 BR2.7 J (3J )
GWA-22 BR-A8 (7 )
GWA-23 BR3.5 (3.4 )
GWA-2BR3.2 (2.7 )
GWA-4BR8.9 (8.4 )
GWA-7BR11 (11 )
MW-15BR0.2 3J (0 .1 2J)
MW-7BR1.8 J (˂6 U)
MW-9BR0.3 4 (2.6J )
BG-4B RNS
GWA-3BRNS
GWA-9BRNS
VANADIU M ISOCON CEN TRAT ION CONTOUR MAP - B EDR OCK WEL LS (BR)
GASTON COU NTY, NORTH CAR OLINA
LEGEND:
&<GR OU NDWATER ASSESSMENT MONITORING WELLIDENTIFICATION AN D LOCATION
IMAC CONTOUR (DASHED WH ERE INFERRED)
ISOCONC ENTRATION C ON TOUR ABOVESTANDARD (DASHED WHERE INFERRED)
DUKE EN ERGY PR OPERTY BOUN DARY
ASH BASIN WASTE BOU ND ARY
ASH BASIN COMPLIANC E BOU NDARY
ASH BASIN COMPLIANC E BOU NDARY COIN CIDENTWITH DU KE ENERG Y PROPERTY BOU ND ARY
STREAM
10 FOOT SURVEY CONTOU RS
DATE
FIGUREAUGUST 2016
3-4.39
DUKE ENER GY CAR OLINAS, L LCRIVERBEND STEAM STATION ASH B ASIN
300 0 300 600
SCALE (FEET)
NOTES:
• U LESS THAN LABORATORY REPORTING LIMIT• J ESTIMAT ED CONCEN TRATION• J+ ESTIMATED CONC ENT RATION (BIASED HIGH)
• GROU NDWATER INT ERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC) FOR VANADIUM IS 0.3 µg/L• 15(17.2) TOTAL CONCENTRATION (DISSOLVED CONCENTRATION)
• ALL CONCENTRATION S REPORTED IN MICR OGRAMS PER LITER (µg/L)• CONTOURS GENERATED U SING GROUND WATER RESULTS• GROU NDWATER SAMPLING TOOK PLAC E BETWEEN JAN UARY TO APRIL 2016, AND DO NOT REPRESENT A SYNOPTIC GROUNDWATER SAMPLING EVENT• PARCEL DATA FOR TH E SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AN D IS APPROXIMATE• ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014)• THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCOR DING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a)• HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MIN UTE SERIES TOPOGRAPHIC MAPS AND ON-SITE OBSERVATION S• TOPOGRAPHY DATA FOR ON-SITE WAS OBTAINED FROM WSP (D ATED 2015)• TOPOGRAPHY DATA FOR OFF-SITE WAS OBTAINED FROM NCDOT GIS WEBSITE (D ATED 2007)• POREWATER CON CENTR ATIONS ARE SH OWN IN BLUE FOR REFEREN CE PURPOSES, BUT NOT UTILIZED FOR CONTOURING.• NS - NOT SAMPLED D URING THE ROUND 5 SAMPLING EVENT
• B41/49 WSW W ELL ID (NC DEQ ID /COMPREHENSIVE SITE ASSESSMENT ID)• GROU NDWATER ASSESSMENT MONITORING WELLS SCREENED WITHIN ASH BASIN POREWATER ARE NOT INCLUD ED ON THIS MAP• ONLY MONITOR ING WELLS SC REEN ED WITHIN GROUN DWATER HAVE BEEN U SED TO GENERATE ISOCONCENTR ATION CONTOUR S ON THIS MAP
N
&<&<
&<&<
&<&<&<
&<&<
&<&<&<&<&<
&<&<&<
&<&<
&<&<&<&<&<&<&<&<
&<&<&<
&<&<
&<&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<
&<&<&<&<&<&<&<&<&<
&<&<&<
&<&<&<&<
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ASH BA SINPRIMARYCELL
ASH BA SINSECONDARYCELL
ASHSTORA GEAREA
CIND ERSTORAGEAREA
C-2S
AB -1DAB-1S
AB -3BR AB -3DAB-3S
AB -4DAB-4S
AB -5DAB-5SAB-5SLAB-6BR U
AB -6S
AB -7DAB-7I AB -7S
AB -8D
AB -8S
AS-1D
AS-1S
AS-2D
AS-2S
AS-3DAS-3S BG -1D BG -1S
BG -2BR BG -2DBG-2S
BG-3D
BG -3S
C-1B RUC-1S C-2D
GWA -10BR UGWA-10S
GWA-1BRUGWA-1S
GWA -2B R
GWA-2BRUGWA-2S
GWA -3D
GWA -3SGWA-3S-A
GWA -4B RGWA-4D GWA -4S
GWA -5DGWA-5S
GWA -6DGWA-6S
GWA -7B RGWA-7DGWA-7S
GWA -8D
GWA -8S
MW-15B RMW-15D
MW-7B R
MW-9B RMW-9D
OB -1 OB -2
MW-10
MW-11DRMW-11SR
MW-12
MW-13
MW-14
MW-15
MW-7D
MW-7SMW-7SR
MW-9 MW-1S/MW-1D
MW-2DMW-2S
MW-3DMW-3S
MW-4D
MW-4S
MW-5DMW-5S
BG -4BR BG -4DBG-4S
BG -5BRBG-5D
GWA-11D
GWA -11S
GWA -12D
GWA-12S GWA -14D
GWA -14S
MW-2S-A
GWA -15DGWA-15SGWA-3B R
A
B'C
C'
D'
B
ED
720
700690
760
7 3 0
6
6
06
5
0
7 5 0
7 0 0
6 8 0
7
1
0
6
7
0
7
4
0
7
3
0
770
720
770760750740
7 0 0
6 8 0
6 7 0
740720740730710
690680
7 2 0
6 9 0680
6 9 0
6 7 0
7 1 0
6 8 0
7 0 0
6 7 0
680
670
730
710
7 2 0
7 1 0
7 0 0
6 6 0
680
6
6
0
7
1
0690
6 9 0
6 8 0
6
8
0
670
6 7 0
6 6 0
780
6
7
0
710 760
700
7
5
0740
7
4
0
7 2 0690
7 0 0
6 8 0
6 9 0
680
6 7 0
6 7 0
6 6 0
6 5 0
6
7
0
760
7 6 0 720
7 2 0
7 1 0
700
710710
710
7
1
0
6
9
0
6 7 0
6
7
0
6 8 0
680
6 7 0
6 5 0
6 6 0
6 6 0
DATE
FIGURE
AUGUST 2016
3-5.1
NOTES:1. AERIAL IMAGERY IS A COMBINATION OF NC ONEMAP (2010) AND A WSP AERIAL SURVEY (2014)2. TEN FOOT TOPOGRAPHICAL CONTOURS OBTAINED FROM 2015 WSP SURVEY DATA3. PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AND IS APPROXIMATE4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L .0107 (a)5. WASTE BOUNDARY IS APPROXIMATE.6. AS-BUILT CAMA ASSESSMENT AND NPDES SERIES MONITORING WELLS ARE PROVIDED BY DUKE ENERGY, WSP, AND OTHERS7. CAMA H/V DELINEATION WELL LOCATIONS (BLUE LABELS) ARE APPROXIMATE AND HAVE NOT BEEN SURVEYED8. YELLOW LABELS INDICATE AN ADDITIONAL ASSESSMENT WELL COMPLETED POST-CSA9. FOR MORE DETAILS REGARDING INDIVIDUAL WATER SUPPLY WELLS, SEE THE WATER SUPPLY WELL ANALYTICAL RESULTS MAP
N
0 500 1,000 1,500Feet
LEGEND
&<CAMA AS SESS MEN T GRO UND WATE RMONITORING W ELL
&<NPDE S C OM PLIA NCE GR OUN DWATERMONITORING W ELL
&<NPDE S V OLUN TARY GR OUN DWATERMONITORING W ELL
ASH BAS IN CO MPL IAN CE BOU NDA RY
ASH BAS IN CO MPL IAN CE BOU NDA RYCOINCIDENT WITH DU KE ENE RGYPROPERTY BOU NDA RY
ASH BAS IN WA STE BOU NDARY
DUKE EN ERG Y PRO PERTY BO UND ARY
LANDFILL C OM PLIA NCE BO UND ARY
LANDFILL/STRU CTUR AL FILL B OUN DARY
ROAD S
10' TO POG RAPH Y
HYDROGR APHY
SITE CROSS SECTION LOCATION SDUKE EN ERGY C AROLIN AS, LLCRIVERBEND STEAM STATION
GASTO N COUN TY, NORTH CARO LIN A
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GWA-20BR
GWA-22BR-A
GWA-13S
GWA-13DE'
7 6 0
7 7 0
750
7 4 0
730
7 6 0
740
7 4 0
7 7 0
7 5 0
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MW-6S
MW-6D
AB-2S
AB-2D GWA-9S
GWA-9D
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650
Lithology0 to 100 REC0 to 100 RQD139.0 (566.59)124.0 (581.59)140.0 (553.0)160.0 (533.0)Lithology0 to 100 REC0 to 100 RQD174.5 (518.5)127.0 (566.0)
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DATE HDR Engineering, Inc. of the Carolinas440 S. Church Street, Suite 900Charlotte, NC 28202-2075704.338.6700 N.C.B.E.L.S. License Number: F-0116
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DATE HDR Engineering, Inc. of the Carolinas440 S. Church Street, Suite 900Charlotte, NC 28202-2075704.338.6700 N.C.B.E.L.S. License Number: F-0116
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NOTE: Nitrate plus Nitrite was reported by the laboratory and is used here. Equivalent weight of 62 used (assumes mostly nitrate).
DATE
PIPER DIAGRAM - BACKGROUND GROUNDWATER,
POREWATER, AREAS OF WETNESS, AND SURFACE WATER AUGUST 2016
F)l DUKE ENERGY CAROLINAS, LLC FIGURE 3-6.1
RIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA

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ANIONS
Samples with a charge balance error (CBE) of < 10% are shown. See companion table for CBE calculations.
NOTE: Nitrate plus Nitrite was reported by the laboratory and is used here. Equivalent weight of 62 used (assumes mostly nitrate).
DATE
PIPER DIAGRAM - SHALLOW GROUNDWATER,
POREWATER, AREAS OF WETNESS, AND SURFACE WATER AUGUST 2016
DUKE ENERGY CAROLINAS, LLC FIGURE
RIVERBEND STEAM STATION ASH BASIN 3-6.2
GASTON COUNTY, NORTH CAROLINA

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Samples with a charge balance error (CBE) of < 10% are shown. See companion table for CBE calculations.
NOTE: Nitrate plus Nitrite was reported by the laboratory and is used here. Equivalent weight of 62 used (assumes mostly nitrate)
DATE
PIPER DIAGRAM - DEEP GROUNDWATER,
POREWATER, AREAS OF WETNESS, AND SURFACE WATER AUGUST 2016
F)l DUKE ENERGY CAROLINAS, LLC FIGURE
RIVERBEND STEAM STATION ASH BASIN 3-6.3
GASTON COUNTY. NORTH CAROLINA

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ANIONS
Samples with a charge balance error (CBE) of < 10% are shown. See companion table for CBE calculations.
NOTE: Nitrate plus Nitrite was reported by the laboratory and is used here. Equivalent weight of 62 used (assumes mostly nitrate).
DATE
PIPER DIAGRAM - BEDROCK GROUNDWATER,
POREWATER, AREAS OF WETNESS, AND SURFACE WATER AUGUST 2016
DUKE ENERGY CAROLINAS, LLC FIGURE
RIVERBEND STEAM STATION ASH BASIN 3-6.4
GASTON COUNTY, NORTH CAROLINA