NC0004961_RBSS_Final Figures_Combined_20151116

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RECEPTOR MAPDUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASINNPDES PERMIT #NC0004961GASTON COUNTY, NORTH CAROLINA
DATE
FIGURE
NOVEMBER 2015
1-4
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NOTES:1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.2. PRIVATE WELLS LOCATIONS ARE APPROXIMATE.3.ORTHOPHOTOGRAPHY IS FROM NC ONEMAP GIS ONLINE SERVICE.4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a).5. HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS LAKE NORMAN SOUTH, NC AND MOUNTAIN ISLAND LAKE, NC-VA.6. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.7. PROPERTY BOUNDARIES WERE SUPPLIED BY THE GASTON COUNTY AND MECKLENBURG COUNTY GIS OFFICES.8. INFORMATION PERTAINING TO IDENTIFIED WATER SUPPLY WELLS IS INCLUDED IN TABLE 4-1
Legend
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARYCOINCIDENT WITH DUKE ENERGYPROPERTY BOUNDARY
0.5 MILE OFFSET FROM ASH BASINCOMPLIANCE BOUNDARY
STREAM
PROPERTY LINES
REPORTED PRIVATE WATER SUPPLY WELL
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Brookshire Blvd
(SECON DA RYCELL)
(PR IMA RYCELL)
ASH B ASIN
CIN DERSTORAGEASHSTOR AGE
RIVER BENDSTEAM STATION
Charlotte-Mecklenburg,Franklin and Vest WTP 1
City of MountHolly, MountHolly WTP
Two Rivers Utilities(City of Gastonia),Gastonia WTP
Charlotte-Mecklenburg,Franklin andVest WTP 2
Secondary CellDischarge Tower
MUNICIPAL WATER INTAKES MA PDUKE ENERGY CA ROLINA S, LLCRIVERBEND STEAM STATION ASH BASINGASTON C OUN TY, NORTH CAROLINA
DATE
FIGURE
NOVEMBER 2015
1-6
P A T H : G :\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 _C A P _F I G U R E S \R I V E R B E N D \R B S S _F I G _1 _5 _2 0 1 5 1 0 1 5 .M X D - U S E R : I H O L D E M A - D A T E : 1 1 /1 0 /2 0 1 5
NOTES:1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.2. PRIVATE WELLS LOCATIONS ARE APPROXIMATE.3. ORTHOPHOTOGRAPHY IS FROM NC ONEMAP GIS ONLINE SERVICE.4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a).5. HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS LAKE NORMAN SOUTH, NC AND MOUNTAIN ISLAND LAKE, NC-VA.6. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.7. PROPERTY BOUNDARIES WERE SUPPLIED BY THE GASTON COUNTY AND MECKLENBURG COUNTY GIS OFFICES.8. INFORMATION PERTAINING TO IDENTIFIED WATER SUPPLY WELLS IS INCLUDED IN TABLE 4-1
Legend
DUKE EN ERG Y PRO PERTY BO UND ARY
ASH BAS IN WA STE BOU NDARY
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
STREAM
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(SECONDARYCELL)
(PRIMARYCELL)
ASH BASIN
CINDERSTORAGEASHSTORAGE
RIVERBENDSTEAM STATION
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S-3
S-4
S-5
S-6 S-7
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RBSP002
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SURFACE WATER FEATU RES MAPDUKE ENERGY CA ROLINA S, LLCRIVERBEND STEAM STATION ASH BASINGASTON C OUN TY, NORTH CAROLINA
DATE
FIGURE
NOVEMBER 2015
1-7
P A T H : G :\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 _C A P _F I G U R E S \R I V E R B E N D \R B S S _F I G _1 _6 _2 0 1 5 1 0 1 4 _I N C L _R E C E P T O R .M X D - U S E R : I H O L D E M A - D A T E : 1 0 /1 5 /2 0 1 5
NOTES:1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.2. PRIVATE WELLS LOCATIONS ARE APPROXIMATE.3. ORTHOPHOTOGRAPHY IS FROM NC ONEMAP GIS ONLINE SERVICE.4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a).5. HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS LAKE NORMAN SOUTH, NC AND MOUNTAIN ISLAND LAKE, NC-VA.6. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.7. PROPERTY BOUNDARIES WERE SUPPLIED BY THE GASTON COUNTY AND MECKLENBURG COUNTY GIS OFFICES.8. INFORMATION PERTAINING TO IDENTIFIED WATER SUPPLY WELLS IS INCLUDED IN TABLE 4-1
Legend
DUKE EN ERG Y PRO PERTY BO UND ARY
ASH BAS IN WA STE BOU NDARY
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
0.5 MILE OFFS ET FRO M ASH BAS INCOMPLIANCE BO UND ARY
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NOTES:
1. PARCEL DATA FOR THE SITE WAS OBTAINED FROM DUKE ENERGY REAL ESTATE AND IS APPROXIMATE.
2. ASH STORAGE BOUNDARY AND CINDER STORAGE BOUNDARY ARE APPROXIMATE. SCALE (FEET)
3. AS -BUILT MONITORING WELL LOCATIONS PROVIDED BY DUKE ENERGY.
4. SHALLOW MONITORING WELLS (S) - WELL SCREEN INSTALLED ACROSS THE SURFICIAL WATER TABLE. 150' 0 /50' 500'
5. SHALLOW LOWER MONITORING WELLS (SL) - BOTTOM OF WELL SCREEN SET AT THE ASH-REGOLITH INTERFACE. l" - 500'
6. INTERMEDIATE MONITORING WELLS (1) - WELL SCREEN INSTALLEDIN REGOLITH BELOW WATER TABLE AND BELOW ASH IN ASH BASIN.
7. DEEP MONITORING WELLS (D) - WELL SCREEN INSTALLED IN THE TRANSITION ZONE BETWEEN COMPETENT BEDROCK AND THE REGOLITH.
8. BEDROCK UPPER MONITORING WELLS (BRU) - WELL SCREEN INSTALLED IN COMPETENT BEDROCK IN THE FIRST 15 FEET WHERE NO TRANSITION ZONE EXISTS.
9. BEDROCK MONITORING WELL (BR) - WELL SCREEN INSTALLED IN ROCK FRACTURE ZONE WITHIN COMPETENT BEDROCK.
10. TOPOGRAPHY DATA FOR THE SITE WAS OBTAINED FROM NC DOT GEOGRAPHIC INFORMATION SYSTEM (GIS) WEB SITE.
11. ORTHOPHOTOGRAPHY WAS OBTAINED FROM WSP (DATED APRIL 2014).
12. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107 (a).
13. SEEP SAMPLING LOCATIONS WERE OBTAINED BY HDR USING A TRIMBLE HANDHELD GPS UNIT ON APRIL 29,2014.
14. HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS MOUNTAIN ISLAND LAKE, NC.
* INDICATES SEEP SAMPLING LOCATIONS WERE NOT RECORDED WITH GPS UNIT AND ARE APPROXIMATE.
LEGEND:
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENT
WITH DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH OR CINDER STORAGE AREA BOUNDARY
STREAM
TOPOGRAPHIC CONTOUR (4 FOOT)
EXISTING ASH BASIN VOLUNTARY GROUNDWATER
MONITORING WELL
EXISTING ASH BASIN COMPLIANCE GROUNDWATER
MONITORING WELL
GROUNDWATER MONITORING WELL LOCATION
OBSERVATION WELL LOCATION
SEEP SAMPLE LOCATION
SURFACE WATER SAMPLE LOCATION
MONITORING WELL AND SAMPLE LOCATIONS
DUKE ENERGY CAROLINAS, LLC
RIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROB NA
DATE
AUGUST 2015
FIGURE
6-2

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ASH BASINSECONDARYCELL
ASHSTORAGEAREA
CINDERSTORAGEAREA
GROUNDWATER ANALYTICAL RESULTS MAP
GASTON COUNTY, NORTH CAROLINA
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 \R E P O R T _R I V E R B E N D _A R C H E _C H E M B O X _G W .M X D - U S E R : M I D A V I S - D A T E : 1 1 /1 3 /2 0 1 5
DATE
FIGURE
NOVEMBER 2015
2-1
N
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
LEGEND
&<ASH BASIN ASSESSMENTGROUNDWATER MONITORING WELL
&<ASH BASIN ASSESSMENT SOIL BORING
&<ASH BASIN COMPLIANCEGROUNDWATER MONITORING WELL
&<ASH BASIN VOLUNTARY GROUNDWATERMONITORING WELL
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARYCOINCIDENT WITH DUKE ENERGYPROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH STORAGE
DUKE ENERGY PROPERTY BOUNDARY
NOTES:U = NOT DETECTED ABOVE THE LABORATORY REPORTING LIMITJ = ESTIMATED CONCENTRATION<3.0 = LESS THAN THE LABORATORY REPORTING LIMITJ+ = ESTIMATED CONCENTRATION BIASED HIGHJ- = ESTIMATED CONCENTRATION BIASED LOW
µg/L: MICROGRAMS PER LITER
Antimony 6.3Chromium49.2Cobalt2.9Iron370pH (field)11.6Vanadium20
A B-1DAnalyte (µg/L)Antimony 3.2Cobalt15.9Iron510Manganese250pH (field)5.18Vanadium1.8
A B-1SAnalyte (µg/L)
Chromium 13.4Chromium (VI)11pH (field)10.94Vanadium32.4
AB-2DAnalyte (µg/L)Antimony 3.1Cobalt17.1Iron1,700Manganese346pH (field)5.1Vanadium3.8
A B-2SAnalyte (µg/L)
Cobalt 1.64Iron4,440Manganese87pH (field)10.8Vanadium32.1
A B-3BRAnalyte (µg/L)Chromium 57.4Chromium (VI)42pH (field)11.9Total Dissolved Solids 946,000Vanadium11.5
A B-3DAnalyte (µg/L)Arsenic 283Cobalt1.9Iron6,500Manganese910Vanadium11.3
A B-3SAnalyte (µg/L)
Antimony 1.2pH (field)10.6Vanadium24
AB-4DAnalyte (µg/L)Antimony 2.2Arsenic428Cobalt5.7Manganese1,200pH (field)9.8Vanadium166
A B-4SAnalyte (µg/L)
Antimony 1.2Chromium (VI)3.3pH (field)10.91Vanadium12.5
A B-5DAnalyte (µg/L)Antimony 21.6Arsenic651Boron1,400Iron660Thallium0.48Vanadium231
A B-5SAnalyte (µg/L)Antimony 3.2Arsenic75.1Boron2,400pH (field)10.73Vanadium151
A B-5SLAnalyte (µg/L)
Antimony 2.5Chromium (VI)2Cobalt1.8Iron970pH (field)9.99Vanadium18.6
AB-6BRUAnalyte (µg/L)Antimony 1.8Chromium (VI)0.21Iron730pH (field)11.91Vanadium25.2
AB-6SAnalyte (µg/L)
Antimony 7.5Chromium32.9Chromium (VI)26pH (field)11.91Vanadium40.5
AB-7DAnalyte (µg/L)Chromium (VI)0.38Cobalt1.6Iron380Manganese89.9 J+pH (field)5.83
A B-7IAnalyte (µg/L)Arsenic 24.3Cobalt13.4Iron11,200Manganese1,300pH (field)5.4Vanadium1.1
AB-7SAnalyte (µg/L)
Manganese 140Vanadium2.7
AB-8DAnalyte (µg/L)Manganese 150pH (field)5.68Vanadium0.79 J
A B-8SAnalyte (µg/L)
Antimony 3Chromium974Chromium (VI)810pH (field)11.4Vanadium14.4
A S-1DAnalyte (µg/L)Boron 2,200Cobalt5.4Iron660Manganese2,200pH (field)6.4Total Dissolved Solids 750000 J-Vanadium 1.6 J+
AS-1SAnalyte (µg/L)
Chromium 22.5Chromium (VI)19pH (field)11.57Vanadium34.6
AS-2DAnalyte (µg/L)Chromium 44.8Cobalt12.4Iron2,090Manganese662pH (field)5.3Vanadium3.9
A S-2SAnalyte (µg/L)
Antimony 1.6Chromium28.3Chromium (VI)19pH (field)10.3Vanadium18.2
AS-3DAnalyte (µg/L)Chromium (VI)1.6Manganese878 J+
AS-3SAnalyte (µg/L)Antimony 1.7Iron990Manganese730Total Dissolved Solids 519,000Vanadium4.9
A S-3SAAnalyte (µg/L)
Antimony 3.3Chromium32.3Cobalt1.3Iron1,500Total Dissolved Solids 555,000Vanadium22
BG-1DAnalyte (µg/L)Cobalt 3Iron2,200Manganese300pH (field)5.75Vanadium5.9
BG-1SAnalyte (µg/L)
Iron 760 JVanadium4.6
BG-2BRAnalyte (µg/L)Chromium 57.5Vanadium29.9
BG-2DAnalyte (µg/L)Manganese 370Vanadium0.35 J
BG-2SAnalyte (µg/L)
Iron 930Manganese63Vanadium3.7
BG-3DAnalyte (µg/L)Antimony 1.3 J+Manganese 240pH (field)6.15Vanadium0.75 J+
BG-3SAnalyte (µg/L)
Arsenic 25.8Cobalt102Iron175,000Manganese3,200pH (field)4.96Sulfate559,000Total Dissolved Solids 1,110,000Vanadium4
C-1SAnalyte (µg/L)
Chromium (VI)2.53pH (field)9.36Vanadium10.9
C-2DAnalyte (µg/L)Chromium (VI)0.273Cobalt39.7Manganese600pH (field)4.16Vanadium0.52 J
C-2SAnalyte (µg/L)
Antimony 3.2Iron720pH (field)11.22Vanadium21
GWA-1DAnalyte (µg/L)Chromium 11.6Cobalt2.1Iron1,800Manganese110pH (field)6.07Vanadium7.9
GWA -1SAnalyte (µg/L)
Vanadium 11.8
GWA-2BRAnalyte (µg/L)Antimony 18.2Chromium46Iron1,500Manganese61pH (field)12.11Total Dissolved Solids 18,100,000Vanadium4
GWA -2BRUAnalyte (µg/L)Iron 590Manganese95pH (field)5.83Vanadium2.3
GWA -2SAnalyte (µg/L)
Cobalt 1.1Manganese9,200Sulfate1,310,000Total Dissolved Solids 2,390,000Vanadium4.6
GWA-3DAnalyte (µg/L)Cobalt 18.4Iron420Manganese12,700pH (field)5.94Sulfate1,420,000Total Dissolved Solids 23,000,000Vanadium1.3
GWA -3SAAnalyte (µg/L)
Chromium 38.1pH (field)12.5Total Dissolved Solids 1,500,000Vanadium0.9
GWA -4BRAnalyte (µg/L)Vanadium 2.4
GWA -4DAnalyte (µg/L)Cobalt 1.7Manganese120Vanadium0.84 J
GWA -4SAnalyte (µg/L)
Chromium 24.5pH (field)10.3Vanadium13.9
GWA -5DAnalyte (µg/L)Cobalt 4.5Manganese190pH (field)3.56
GWA-5SAnalyte (µg/L)Chromium 24.8Chromium (VI)20.6pH (field)11.37Vanadium28
GWA -6DAnalyte (µg/L)Chromium (VI)0.102Cobalt27.6Iron1,100Manganese1,300pH (field)6.25Vanadium4.8
GWA -6SAnalyte (µg/L)
Vanadium 10.9
GWA -7BRAnalyte (µg/L)Iron 440Vanadium12.1
GWA-7DAnalyte (µg/L)Iron 790pH (field)4.99Vanadium3.5 J+
GWA -7SAnalyte (µg/L)
Iron 1,300Manganese96Vanadium5.5
GWA -8DAnalyte (µg/L)Cobalt 66.8Manganese720pH (field)5.03
GWA-8SAnalyte (µg/L)
Antimony 4.5Arsenic10.7Chromium40.6Iron450pH (field)11.54Vanadium67.5
GWA-9BRAnalyte (µg/L)Manganese 90Vanadium2.8
GWA -9DAnalyte (µg/L)Cobalt 50.1Manganese3,040pH (field)4.82Vanadium0.52 J+
GWA-9SAnalyte (µg/L)
Antimony 1.1pH (field)10.92Vanadium6.8
GWA -10DAnalyte (µg/L)Cobalt 10Manganese250pH (field)5.17Vanadium0.62 J
GWA-10SAnalyte (µg/L)
Chromium 16.7pH (field)11.9Vanadium3.43
GWA-20BRAnalyte (µg/L)Chromium 186Cobalt1.9Iron660pH (field)12.5Sulfate376000 J+Thallium 3.2Total Dissolved Solids 2,900,000Vanadium2.1
GWA-20DAnalyte (µg/L)Chromium 133Cobalt12.7Iron9,500Manganese320pH (field)5.3Vanadium23
GWA -20SAnalyte (µg/L)
Chromium 108pH (field)11.4Vanadium4.33
GWA -22BRAnalyte (µg/L)Antimony 1.4Chromium174Cobalt3.4Iron2,600Manganese120pH (field)11Vanadium18.5
GWA -22DAnalyte (µg/L)Antimony 2.2Cobalt1.3pH (field)5.18
GWA -22SAnalyte (µg/L)
Chromium 15.6Chromium (VI)13pH (field)12.2Total Dissolved Solids 790,000Vanadium5.3
GWA -23BRAnalyte (µg/L)Chromium 56.3Chromium (VI)51pH (field)11.2Vanadium34.1
GWA -23DAnalyte (µg/L)Cobalt 3.3Iron530Manganese82pH (field)5.3
GWA-23SAnalyte (µg/L)
Chromium (VI)0.48Manganese530pH (field)6.08Vanadium2.1 J+
MW-1DAnalyte (µg/L)Cobalt 61Iron30,800Manganese2,850
MW-1SAnalyte (µg/L)
pH (field)6.35Vanadium4.7
MW-2DAnalyte (µg/L)
Vanadium 6.2
MW-3DAnalyte (µg/L)Manganese 68pH (field)6.04Vanadium0.6 J+
MW-3SAnalyte (µg/L)
pH (field)4.59Vanadium1.1
MW-4DAnalyte (µg/L)
Cobalt 1.9pH (field)5.93
MW-5SAnalyte (µg/L)pH (field)6.34Vanadium8.6
MW-5DAnalyte (µg/L)
Vanadium 3.8
MW-6DAnalyte (µg/L)pH (field)6.37Vanadium0.35 J
MW-6SAnalyte (µg/L)
Chromium 24.7Total Dissolved Solids 1,180,000Vanadium2.1
MW-7BRAnalyte (µg/L)
Chromium (VI)0.5Cobalt1.1Iron2,700pH (field)6.37Vanadium4.1
MW-8DAnalyte (µg/L)Iron 2,100pH (field)5.68Vanadium2.8
MW-8IAnalyte (µg/L)Chromium (VI)0.25Manganese57pH (field)6.1Vanadium0.32 J+
MW-8SAnalyte (µg/L)
Chromium (VI)0.54pH (field)6.1Vanadium2.7
MW-9Analyte (µg/L)Antimony 2.3Chromium (VI)4.2pH (field)11.4Vanadium7.8
MW-9BRAnalyte (µg/L)Antimony 5.4Chromium29.6Chromium (VI)28Chromium (VI)22.1pH (field)11.49Vanadium12.8
MW-9DAnalyte (µg/L)
Chromium (VI)0.2Iron420pH (field)4.57Vanadium1.2
MW-10Analyte (µg/L)
Chromium (VI)1.68pH (field)5.9Vanadium2.1
MW-11DRAnalyte (µg/L)Chromium (VI)1.3pH (field)5.8Vanadium1.4
MW-11SRAnalyte (µg/L)
Cobalt 23.7Iron15,700Manganese8,300
MW-13Analyte (µg/L)
Chromium (VI)0.76Vanadium2.6 J+
MW-14Analyte (µg/L)
Chromium (VI)4.3Cobalt1.3pH (field)4.31Vanadium2.7
MW-15Analyte (µg/L)pH (field)11.21Vanadium2.2
MW-15BRAnalyte (µg/L)Vanadium 22.4
MW-15DAnalyte (µg/L)
200 0 200 400
SCALE (FEET)
Constituent CAS No.NC 2L Standard1, IMAC2 or DHHS3
CriteriaAntimony7440-36-0 1*Ars enic 7440-38-2 10Barium7440-39-3 700Beryllium7440-41-7 4*Boron 7440-42-8 700Cadmium7440-43-9 2Chloride**16887-00-6 250,000Chromium7440-47-3 10Chromium VI 18540-29-9 0.073
Cobalt 7440-48-4 1*Copper**7440-50-8 1,000Iron7439-89-6 300Lead7439-92-1 15Manganese7439-96-5 50Mercury7439-97-6 1Nickel7440-02-0 100Nitrate**14797-55-8 10,000Nitrite as N**14797-65-0 1,000pH (field)PH 6.5 - 8.5Selenium7782-49-2 20Sulfate**14808-79-8 250,000Thallium7440-28-0 0.2Total Dis s olved Solids **TDS 500,000Vanadium7440-62-2 0.3*Zinc**7440-66-6 1000
A ll units s how n in ug/L ex cept f or pH w hich is standard pH units .
1 - North Carolina 02L Groundw ater Quality Criteria.2 - North Carolina Interim Max imum A llow able Conc entration (IMA C).
* Interi m Maxi mum All owab le Conc entrati on (IMAC) Criteria Value
3 - North Carolina Department of Health & Human Services (DHHS) Health Screening Levels f or Drinking Water Supply Wells Criterion f or Hexav alent Chromium (Chromium V I).
** Unit reported in mg/l in standard, converted here to ug/l to match units displayed on f igure.
N O T E S O N B A S E L A Y E R S :1 . P A R C E L D AT A F O R T H E S I T E W A S O B T A I N E D F R O M D U K E E N E R G Y R E A L E S T A T E A N D I S A P P R O X I M A T E .2 . W A S T E B O U N D A R Y A N D A S H S T O R A G E A R E A B O U N D A R Y A R E A P P R O X I M A T E .3 . A S -B U I L T M O N I T O R I N G W E L L L O C A T I O N S P R O V I D E D B Y D U K E E N E R G Y .4 . C O M P L I A N C E S H A L L O W M O N I T O R I N G W E L L S (S ) A R E S C R E E N E D A C R O S S T H E S U R F I C I A L W A T E R T A B L E .5 . C O M P L I A N C E D E E P M O N I T O R I N G W E L L S (D ) A R E S C R E E N E D B E T W E E N C O M P E T E N T B E D R O C K A N D T H E R E G O L I T H .6 . T O P O G R A P H Y (1 0 -F O O T I N T E R VA L ) D A T A W I T H I N T H E A R E A N O R T H O F D U K E P O W E R (M C C R A W ) R O A D W A S O B T A I N E D F R O M W S P D A T E D A P R I L 2 0 , 2 0 1 5 . T O P O G R A P H Y (1 0 -F O O T I N T E R V A L ) D A T A W I T H I N T H E C C P L A N D F I L L W A S P R O V I D E D B Y D U K E E N E R G Y C A R O L I N A S , L L C D A T E D M A Y 2 1 , 2 0 1 5 . A R E A S O U T S I D E O F T H E C C P L A N D F I L L A N D S O U T H O F D U K E P O W E R (M C C R A W ) R O A D W A S O B T A I N E D F R O M N C D O T W E B S I T E (4 -F O O T I N T E R VA L ) D A T E D 2 0 1 0 .
7 . A E R I A L P H O T O G R A P H Y W A S O B T A I N E D F R O M W S P D A T E D J U L Y 2 0 1 5 .8 . T H E C O M P L I A N C E B O U N D A R Y I S E S T A B L I S H E D A C C O R D I N G T O T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L .0 1 0 7 (a ).9 . H Y D R O G R A P H Y W A S O B T A I N E D F R O M T H E P R O V I S I O N A L J U R I S D I C T I O N A L W A T E R S M A P (U S A C E A P P R O VA L P E N D I N G ), P R O V I D E D B Y A M E C F O S T E R W H E E L E R , D A T E D M A Y 2 9 , 2 0 1 5 .1 0 . T H E U N I T 5 I N A C T I V E A S H B A S I N P R O V I S I O N A L C O M P L I A N C E B O U N D A R Y I S D E P I C T E D P E R T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L .0 1 0 7 (a ). T H E E S T A B L I S H M E N T O F T H E P R O V I S I O N A L C O M P L I A N C E B O U N D A R Y I S P E N D I N G R E V I E W A N D A P P R O V A L B Y N C D E Q .
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S R -2 0 7 4
S R -1 9 1 2
SURFACE WATER AND SEEP ANALYTICAL RESULTS
GASTON COUNTY, NORTH CAROLINA
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 \R E P O R T _R I V E R B E N D _A R C H E _C H E M B O X _S W .M X D - U S E R : S G R O S E N I - D A T E : 1 1 /1 3 /2 0 1 5
DATE
FIGURE
NOVEMBER 2015
N
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
LEGEND
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARYCOINCIDENT WITH DUKE ENERGYPROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH STORAGE
DUKE ENERGY PROPERTY BOUNDARY
!(SEEP AND SEDIMENT SAMPLELOCATION
!(SURFACE WATER SAMPLE LOCATION
NOTES:U = NOT DETECTED ABOVE THE LABORATORY REPORTING LIMITJ = ESTIMATED CONCENTRATION<3.0 = LESS THAN THE LABORATORY REPORTING LIMITJ+ = ESTIMATED CONCENTRATION BIASED HIGHJ- = ESTIMATED CONCENTRATION BIASED LOW
SURFACE WATER FRACTIONS:T = TOTAL FRACTIOND = DISSOLVED FRACTIONN = N/A OR NOT CLASSIFIED
mg/L: MILLIGRAMS PER LITERµg/L: MICROGRAMS PER LITER
500 0 500 1,000
SCALE (FEET)
FractionAluminum43,900 TAntimony7.3 TArsenic229TChromium47.6 TCobalt56.5 TIron19,100 TLead107TManganese140TNickel103TThallium5.4 TZinc150T
SW-1Analyte (µg/L)
FractionAluminum93.1 TArsenic37.2 TThallium0.94 T
SW-2Analyte (µg/L)
FractionAlkalinity, lab 106,000 NAluminum310TManganese370TTotal Dissolved Solids 332,000 NZinc210DZinc220T
SW-3Analyte (µg/L)
FractionCobalt1.4 TManganese300TVanadium0.33 J T
S-2Analyte (µg/L)
FractionCobalt2.8 TIron420TManganese460TVanadium0.61 J T
S-4Analyte (µg/L)
FractionCobalt2TIron310TManganese210TVanadium0.48 J T
S-9Analyte (µg/L)
FractionChromium (VI)0.121 TCobalt46.1 TIron4,600 TManganese3,100 TVanadium1.8 T
S-5Analyte (µg/L)
FractionChromium (VI)0.138 TCobalt9.6 TIron2,200 TManganese4,300 TVanadium0.68 J T
S-6Analyte (µg/L)
FractionChromium10.4 TCobalt11.7 TIron19200 J+TManganese2300 J+TVanadium6.2 T
S-7Analyte (µg/L)
FractionCobalt13TIron1,700 TManganese2,000 TVanadium3.2 T
S-11Analyte (µg/L)
FractionIron1,400 TManganese92TVanadium1.5 T
S-8Analyte (µg/L)
FractionAluminum130TIron1,600 TManganese110T
S-13Analyte (µg/L)
Total Dissolved
Aluminum 7429-90-5 87 NSAntimony7440-36-0 640 NSArsenic7440-38-2 10 150Barium7440-39-3 200,000 NSBoron7440-42-8 NS NSBeryllium7440-41-7 NS 6.5Cadmium7440-43-9 NS 0.15Chromium7440-47-3 NS 11Chromium VI 18540-29-9 NS 0.7Cobalt7440-48-4 4 NSCopper7440-50-8 NS 2.7Iron7439-89-6 NS NSLead7439-92-1 NS 0.54Manganese7439-96-5 100 NSMercury7439-97-6 0.012 NSMolybdenum7439-98-7 2,000 NSNickel7440-02-0 25 16Selenium7782-49-2 5 NSStrontium7440-24-6 40,000 NSThallium7440-28-0 0.47 NSVanadium7440-62-2 NS NSZinc7440-66-6 NS 36Alkalinity, HCO3 ALK-HCO3 NS NSAlkalinity, CO3 ALK-CO3 NS NSAlkalinity, lab ALK-LAB NS NSCalcium7440-70-2 NS NSChloride16887-00-6 230,000 NSMagnesium7439-95-4 NS NSMethane74-82-8 NS NSNitrite as N 14797-65-0 2.7 NSNitrogen, NO2 plus NO3 NO2-NO3 NS NSPotassium7440-09-7 NS NSSodium7440-23-5 NS NSSulfate14808-79-8 NS NSSulfide18496-25-8 NS NSTotal Organic Carbon TOC NS NSTotal Dissolved Solids TDS NS NSTotal S uspended Solids TSS NS NSAll values shown in µg/L (micrograms per liter).
2B Surface Water EPA StandardAnalyteCAS No.
2-2
PARAMETER CAS RN F R A C T I O N
Water Supply SOURCEAlkalinity, CO3 100 m g/l NC WSAlkalinity, HCO3 NAAlkalinity, lab 100 m g/lAluminum7429-90-5 T 87 NC FWAntimony7440-36-0 T 5.6 NCWSArsenic7440-38-2 T 10 NCWSArsenic7440-38-2 D 150 NCFWAs(III)7784-46-5 T NAAs(V)10103-60-3 T NABarium7440-39-3 T 1 m g/l NCWSBeryllium7440-41-7 D 6.5 NCFWCadmium7440-43-9 D 0.15 NCFWCalcium7440-70-2 T NAChloride16887-00-6 T 230 m g/l NCFWChromium7440-47-3 T 11 EPA-ALChromium (III)16065-83-1 D 24 NCFWChromium (III)16065-83-1 T 74 EPA-ALChromium (VI)18540-29-9 D 11 NCFWChromium (VI)18540-29-9 T 11 NCFWCobalt7440-48-4 T 3 NCWSCopper7440-50-8 D 2.7 NCFWIron7439-89-6 T 1000 EPA-ALIron (II)1345-25-1 T NAIron (III)1309-37-1 T NALead7439-92-1 T 2.5 EPA-ALLead7439-92-1 D 0.54 NCFWMagnesium7439-95-4 T NAManganese7439-96-5 T 50 EPAHH1Manganese (II)1344-43-0 T NAManganese (IV)1313-13-9 T NAMercury7439-97-6 T 0.012 NCFWMethane74-82-8 NAMolybdenum7439-98-7 T 160 NCWSNickel7440-02-0 T 25 NCWSNickel7440-02-0 D 16 NCFWNitrate14797-55-8 10 mg/l NCWSNitrogen, NO2 plus NO3 NO2-NO3 NApHPH6.0 - 9.0 NCFWPotassium7440-09-7 T NASelenium7782-49-2 T 5 NCFWSelenium (IV)10102-18-8 T NASelenium (VI)13410-01-0 T NASodium7440-23-5 T NAStrontium7440-24-6 T 14 mg/l NCWSSulfate14808-79-8 T 250 m g/l NCWSSulfide18496-25-8 T NAThallium7440-28-0 T 0.24 NCWSTotal Diss olved Solids TDS 250 m g/l EPAHH1Total Organic Carbon TOC NATotal Sus pended Solids TSS NAZinc7440-66-6 D 36 NCFWZinc7440-66-6 T 120 EPA-AL
General Notes:NA - Not applicableAll units in ug/l unless otherw ise noted.Fraction Code Explanations:T - Total Recoverable FractionD - Dissolved Fraction (filtered samples)Source Key Explanations :NCFW - Freshw ater Aquatic Lif e (Chronic value if available) Criteria f rom the North Carolina 15A NCAC 02B Surface Water Standards and Protective Values & EPA National Recommended Water Quality Criteria Triennial Review Combined TableNCHH - Human Health Criteria f rom the North Carolina 15A NCAC 02B Surface Water Standards and Protective Values & EPA National Recommended Water Quality Criteria Triennial Review Combined TableNCWS - Water Supply Criteria f rom the North Carolina 15A NCAC 02B Surface Water Standards and Protective Values & EPA National Recommended Water Quality Criteria Triennial Review Combined Table
EPAHH1 - United States Environmental Protection Agency National Recommended Water Quality Criteria - Human Health Table - Organism + Water Criteria
2L Surface Water EPA Standard
N O T E S O N B A S E L A Y E R S :1 . P A R C E L D A T A F O R T H E S I T E W A S O B T A I N E D F R O M D U K E E N E R G Y R E A L E S T A T E A N D I S A P P R O X I M A T E .2 . W A S T E B O U N D A R Y A N D A S H S T O R A G E A R E A B O U N D A R Y A R E A P P R O X I M A T E .3 . A S -B U I L T M O N I T O R I N G W E L L L O C A T I O N S P R O V I D E D B Y D U K E E N E R G Y .4 . C O M P L I A N C E S H A L L O W M O N I T O R I N G W E L L S (S ) A R E S C R E E N E D A C R O S S T H E S U R F I C I A L W A T E R T A B L E .5 . C O M P L I A N C E D E E P M O N I T O R I N G W E L L S (D ) A R E S C R E E N E D B E T W E E N C O M P E T E N T B E D R O C K A N D T H E R E G O L I T H .6 . T O P O G R A P H Y (1 0 -F O O T I N T E R V A L ) D A T A W I T H I N T H E A R E A N O R T H O F D U K E P O W E R (M C C R A W ) R O A D W A S O B T A I N E D F R O M W S P D A T E D A P R I L 2 0 , 2 0 1 5 . T O P O G R A P H Y (1 0 -F O O T I N T E R V A L ) D A T A W I T H I N T H E C C P L A N D F I L L W A S P R O V I D E D B Y D U K E E N E R G Y C A R O L I N A S , L L C D A T E D M A Y 2 1 , 2 0 1 5 . A R E A S O U T S I D E O F T H E C C P L A N D F I L L A N D S O U T H O F D U K E P O W E R (M C C R A W ) R O A D W A S O B T A I N E D F R O M N C D O T W E B S I T E (4 -F O O T I N T E R V A L ) D A T E D 2 0 1 0 .
7 . A E R I A L P H O T O G R A P H Y W A S O B T A I N E D F R O M W S P D A T E D J U L Y 2 0 1 5 .8 . T H E C O M P L I A N C E B O U N D A R Y I S E S T A B L I S H E D A C C O R D I N G T O T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L .0 1 0 7 (a ).9 . H Y D R O G R A P H Y W A S O B T A I N E D F R O M T H E P R O V I S I O N A L J U R I S D I C T I O N A L W A T E R S M A P (U S A C E A P P R O V A L P E N D I N G ), P R O V I D E D B Y A M E C F O S T E R W H E E L E R , D A T E D M A Y 2 9 , 2 0 1 5 .1 0 . T H E U N I T 5 I N A C T I V E A S H B A S I N P R O V I S I O N A L C O M P L I A N C E B O U N D A R Y I S D E P I C T E D P E R T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L .0 1 0 7 (a ). T H E E S T A B L I S H M E N T O F T H E P R O V I S I O N A L C O M P L I A N C E B O U N D A R Y I S P E N D I N G R E V I E W A N D A P P R O V A L B Y N C D E Q .
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SOIL ANALYTICAL RESU LTS – PLAN VIEW (PSRG AND POG EXCEEDANCES)
GASTON COUNTY, NORTH CAROLINA
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LEGEND
&<ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
!(SEDIMENT SAMPLE LOCATION
!(SURFACE WATER SAMPLE LOCATION
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENTWITH DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH STORAGE
DUKE ENERGY PROPERTY BOUNDARY
DATE
FIGURE
NOVEMBER 2015
2-3
DU KE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
N
SCALE (FEET)
2,000 0 2,000 4,000
NOTES:J = ESTIMATED CONCENTRATIONJ+ = ESTIMATED CONCENTRATION BIASED HIGHJ- = ESTIMATED CONCENTRATION BIASED LOW
PSRG: PRELIMINARY SOIL REMEDIATION GOALPOG: PROTECTION OF GROUNDWATERft: FEETDNE*: DOES NOT EXCEEDmg/kg: MILLIGRAM PER KILOGRAM
Sample Depth (ft)3.5-5 48.5-50 68.5-70Soil Soil Soil
Arsenic DNE*33.8 26.5ChromiumDNE*9.6 19.2CobaltDNE*4.1 J 4.1 JIron7620 J 7,220 17,900Vanadium18.1 23.9 47.9
AB-3D
Analyte (mg/kg)
Sample Depth (ft)48.5-50 58.5-61.5Soil Soil
Chromium 27.3 26.3Cobalt36.1 63.6Iron42,400 19,000Manganese485 3,320NickelDNE*167Vanadium58.1 40.4
AB-4D
Analyte (mg/kg)
Sample Depth (ft)53.5-55Soil
Chromium 33.4Cobalt75Iron41,300Manganese1,950Vanadium81.6
AB-4S
Analyte (mg/kg)
Sample Depth (ft)58.5-60 63.5-65Soil Soil
Chromium 21.6 6.1Cobalt16.2 6 JIron36,600 37,100Manganese135 108Vanadium119 141
AB-5D
Analyte (mg/kg)
Sample Depth (ft)23.5-25 28.5-30Soil Soil
Arsenic DNE*24.6Chromium16.8 27.6CobaltDNE*4.7Iron7,830 21,200ManganeseDNE*119Vanadium58.2 56.3
AB-7D
Analyte (mg/kg)
Sample Depth (ft)18.5-20Soil
Arsenic 35.1Chromium17.2Cobalt8.3Iron16,400Manganese158Selenium2.4 JVanadium66.9
AB-7S
Analyte (mg/kg)
Sample Depth (ft)13-15 20-25Soil Soil
Boron 51.7 50Chromium186 177Cobalt48.4 70.1Iron57,500 50,200Manganese1,080 1,660Vanadium140 145
AB-8S
Analyte (mg/kg)
Sample Depth (ft)83.5-85.5 88.5-90.5Soil Soil
Chromium 7.6 J+DNE*Cobalt 5.1 5.2Iron14,400 7,540Manganese170 194Vanadium35.4 17.2
AS-1D
Analyte (mg/kg)
Sample Depth (ft)23.5-25 28.5-30 30-31.5Soil Soil Soil
Arsenic DNE* DNE*10.9Chromium4.2 J+ 4.8 J+ 9.7 J+Cobalt 5.9 6.1 3.7Iron12,200 12,900 14,300Manganese313 276 85Vanadium33.8 37.3 44.4
AS-2D
Analyte (mg/kg)
Sample Depth (ft)53.5-55 58.5-60Soil Soil
Arsenic 8.6 DNE*Chromium 9.1 DNE*Cobalt 5.2 8.3Iron16,600 11,100Manganese127 793Vanadium46 21
AS-3D
Analyte (mg/kg)
Sample Depth (ft)5-6 14-15 24-25 30-31 34-35 44-45Soil Soil Soil Soil Soil Soil
Chromium 9 5.5 5.4 DNE* DNE*4.6CobaltDNE*5 J 22.8 12.1 13.9 9.9Iron32,200 26,800 28,200 20,000 19,300 13,500ManganeseDNE*226 1,140 518 921 817SeleniumDNE* DNE* DNE*4.7 J DNE* DNE*Vanadium 89.2 70.2 75.8 59.7 53.3 38
BG-1D
Analyte (mg/kg)
Sample Depth (ft)3.5-5 48-49 53-54 60-62 74-75Soil Soil Soil Soil Soil
Chromium 33 6 4.5 20.6 5.5CobaltDNE*14.6 8.5 13.8 9.2Iron36,500 17,100 16,000 20,600 14,600ManganeseDNE*290 689 1,440 975Vanadium89.2 43.9 40.8 58.8 37.9
BG-2D
Analyte (mg/kg)
Sample Depth (ft)3-5 18.5-20 23-24 27-28 34-35.5 73-75Soil Soil Soil Soil Soil Soil
Chromium 17.4 14.4 6.1 6.7 5.7 DNE*Cobalt DNE*14.6 11 12.1 8 DNE*Iron 34,100 23,800 18,100 23,500 19,400 13,500Manganese114 943 626 724 542 805Vanadium67.5 62.3 45.4 50.6 41.6 30.5
BG-3D
Analyte (mg/kg)
Sample Depth (ft)13.5-15 23.5-25Soil Soil
Chromium 9.3 6.2CobaltDNE*6Iron6,380 11,500ManganeseDNE*242Vanadium15.2 23.3
C-1D
Analyte (mg/kg)
Sample Depth (ft)18.5-20 23.5-25Soil Soil
Chromium 9.9 6.4Cobalt3.1 J 14Iron39,000 12,800ManganeseDNE*237Vanadium38.1 40.1
C-2D
Analyte (mg/kg)
Sample Depth (ft)28.5-30 33.5-35Soil Soil
Chromium 92.8 110Cobalt34.8 38.9Iron31,700 55,200Manganese1,090 2,940Vanadium88.2 133
GWA-1D
Analyte (mg/kg)
Sample Depth (ft)38.5-40 43.5-45Soil Soil
Cobalt 15 12.6Iron24,100 32,300Manganese713 1,120Vanadium89.4 126
GWA-2BRU
Analyte (mg/kg)
Sample Depth (ft)18.5-19Soil
Chromium 4.5Iron5,320Manganese155Vanadium11.5
GWA-3D
Analyte (mg/kg)
Sample Depth (ft)15-19 24-26 24-26 32-35 34-36Soil Soil Soil Soil Soil
Chromium 58 DNE*5.1 5.5 DNE*Cobalt 25.5 5.5 J 5.8 J 4.4 J 3.1 JIron38,700 9,520 10,200 8,190 4,950Manganese367 192 269 168 231Selenium5.6 J DNE* DNE* DNE* DNE*Vanadium 62.9 17.4 19.2 17.3 DNE*
GWA-4S
Analyte (mg/kg)
Sample Depth (ft)58.5-60 68.5-70Soil Soil
Chromium DNE*8Cobalt13.5 17.3Iron18,600 16,000Manganese477 575Vanadium33.6 34.9
GWA-5D
Analyte (mg/kg)
Sample Depth (ft)43.5-45 48.5-50Soil Soil
Chromium 7.3 J+DNE*Cobalt 25.4 10.5Iron19,000 18,200Manganese1,270 523Vanadium55.8 55.5
GWA-6D
Analyte (mg/kg)
Sample Depth (ft)13.5-15 23.5-25Soil Soil
Chromium 13 15.8Cobalt34.7 20.1Iron23,200 19,000Manganese813 296Vanadium73.8 59.2
GWA-7D
Analyte (mg/kg)
Sample Depth (ft)7-8Soil
Chromium 53.4Cobalt73.8Iron58,900Manganese1,700Vanadium209
GWA-7S
Analyte (mg/kg)
Sample Depth (ft)8.5-10 18.5-20 63-65Soil Soil Soil
Chromium 131 135 130Cobalt87 102 66Iron54,200 36,400 54,500Manganese959 1,410 1,230NickelDNE*151 DNE*Vanadium 80.1 33.5 80.7
GWA-8D
Analyte (mg/kg)
Sample Depth (ft)1-1 3.5-5Soil Soil
Chromium 52.1 210Cobalt38.7 19.8Iron62,500 109,000Manganese1,560 937Vanadium143 148
GWA-9D
Analyte (mg/kg)
Sample Depth (ft)40-41.5 45-46.5Soil Soil
Chromium 4.4 7.4CobaltDNE*5 JIron9,880 16,300Manganese131 184Vanadium19 31.1
GWA-20D
Analyte (mg/kg)
Sample Depth (ft)38.5-40 48.5-50Soil Soil
Chromium 4 DNE*Cobalt DNE*3.9 JIron7,160 6,990Manganese77.7 113Vanadium7 J 9.3
GWA-22D
Analyte (mg/kg)
Sample Depth (ft)33.5-35 38.5-40Soil Soil
Cobalt 6.9 18.6Iron5,230 7,710Manganese336 210Vanadium9.9 14.2
GWA-23D
Analyte (mg/kg)
Sample Depth (ft)43.5-45 53.5-55Soil Soil
Chromium DNE*7.6Cobalt7.3 J 14.7Iron12300 J 21,000Manganese446 J 615Vanadium29.2 58.5
MW-7BR
Analyte (mg/kg)
Sample Depth (ft)3.5-5Soil
Chromium 23.7Cobalt37.9Iron26,000Manganese656Vanadium55.4
MW-9D
Analyte (mg/kg)
Sample Depth (ft)3.5-5 13.5-15Soil Soil
Chromium 30.1 29.5Cobalt6.6 J 17.4Iron48,800 36,400Manganese335 574Vanadium118 74.4
MW-15D
Analyte (mg/kg)
Sample Depth (ft)33.5-35 43.5-45Soil Soil
Chromium 7.9 4.4Cobalt17.6 15.9Iron27,400 36,700Manganese905 1,270Vanadium91 128
OB-1
Analyte (mg/kg)
Sample Depth (ft)38.5-40 48.5-50Soil Soil
Cobalt 36.1 16.8Iron41,000 24,900Manganese1,950 938Vanadium130 80.2
OB-2
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 21Cobalt15.5Iron34,600Manganese257Vanadium39.8
S-1
Analyte (mg/kg)
Sample Depth (ft)0SD
Arsenic 11.2 JChromium16.5Cobalt124Iron25,400Manganese2,560Vanadium63.5
S-2
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 25.2Cobalt346Iron28,500Manganese1,870Vanadium63.7
S-3
Analyte (mg/kg)
Sample Depth (ft)0SD
Barium 1,960Boron45.1 JChromium43.8Cobalt355Iron92,500Manganese64,400Vanadium23.2 J
S-6
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 40.2Cobalt73.6Iron35,200Manganese470Vanadium113
S-10
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 34.9Cobalt92Iron56,100Manganese2,170Vanadium99
S-11
Analyte (mg/kg)
Sample Depth (ft)0SD
Arsenic 61.8Chromium102Cobalt294Iron65,800Manganese11,500Vanadium126
S-12
Analyte (mg/kg)
Sample Depth (ft)8-9 13-14Soil Soil
Chromium 12.3 11.1Cobalt24.4 20.7Iron30,100 25,400Manganese1,840 893Vanadium59.3 69
GWA-10S
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 51.5Cobalt162Iron58,000Manganese4,110Vanadium86.2
S-4
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 47.1Cobalt139Iron33,700Manganese1,630Vanadium64.5
S-9
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 5.5Cobalt4.6 JIron8,100Manganese92.8Vanadium25.6
S-8
Analyte (mg/kg)
Sample Depth (ft)0SD
Chromium 34.1Cobalt54.5Iron33,300Manganese2,470Vanadium35.2
S-7
Analyte (mg/kg)
Alkalinity, lab 106,000Aluminum 310Manganese 370Total Dissolved Solids 332,000Zinc 210Zinc 220
SW-3Analyte (µg/L)
Co n stituen t CAS No .
NC Pro tec tio n o f Gro un d w ater PSRGAluminum 7429-90-5 NSAntimony7440-36-0 0.9Arsenic7440-38-2 5.8Barium7440-39-3 580Beryllium7440-41-7 63Boron7440-42-8 45Cadmium 7440-43-9 3Chromium* 16065-83-1 3.8*Cobalt 7440-48-4 0.9Copper7440-50-8 700Cr(VI)18540-29-9 3.8Iron7439-89-6 150Lead7439-92-1 270Manganese 7439-96-5 65Mercury7439-97-6 1Molybdenum 7439-98-7 NSNickel7440-02-0 130Nitrate14797-55-8 NSSelenium 7782-49-2 2.1Silver7440-22-4 3.4Strontium 7440-24-6 NSThallium7440-28-0 0.28Tin7440-31-5 10,000Vanadium 7440-62-2 6Zinc7440-66-6 1,200* Hexavalent Chromium (Chromium VI) criterion used as ascreening criteria for Chromium as no PSRG is available.
All units shown in mg/kg.
N O TE S O N B A S E L AY ER S :1 . PA R C E L D ATA F O R T H E S I T E WA S O B TA I N ED F R O M D U K E E N E R G Y R E A L E S TAT E A N D I S A P P R O X I M AT E.2 . WA S T E B O U N D A RY A N D A S H S TO R A G E A R EA B O U N D A RY A R E A P P R O X I M AT E .3 . A S - B U I LT M O N I TO R I N G W E L L L O C AT I O N S P R O V I D ED B Y D U K E E N E R G Y.4 . C O M P L I A N C E S H A L L O W M O N I TO R I N G W EL L S ( S ) A R E S C R E EN E D A C R O S S TH E S U R F I C I A L WAT E R TA B L E .5 . C O M P L I A N C E D E EP M O N I TO R I N G W E L L S ( D ) A R E S C R E E N E D B ET W E E N C O M P E TE N T B E D R O C K A N D T H E R E G O L I T H .6 . TO P O G R A P H Y ( 1 0 - F O O T I N T ERVA L ) D ATA W I T H I N T H E A R E A N O RT H O F D U K E P O W E R ( M C C R AW ) R O A D WA S O B TA I N E D F R O M W S P D AT E D A P R I L 2 0 , 2 0 1 5 . TO P O G R A P H Y ( 1 0 - F O O T I N T E RVA L ) D ATA W I T H I N T H E C C P L A N D F I L L WA S P R O V I D E D B Y D U K E E N E R G Y C A R O L I N A S , L L C D AT E D M AY 2 1 , 2 0 1 5 . A R E A S O U TS I D E O F TH E C C P L A N D F I L L A N D S O U T H O F D U K E P O W E R ( M C C R AW ) R O A D WA S O B TA I N E D F R O M N C D O T W E B S I TE ( 4 - F O O T I N T E RVA L ) D AT ED 2 0 1 0 .
7 . A E R I A L P H O TO G R A P H Y WA S O B TA I N ED F R O M W S P D AT E D J U LY 2 0 1 5 .8 . T H E C O M P L I A N C E B O U N D A RY I S E S TA B L I S H E D A C C O R D I N G T O T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L . 0 1 0 7 ( a ) .9 . H Y D R O G R A P H Y WA S O B TA I N ED F R O M TH E P R O V I S I O N A L J U R I S D I C T I O N A L WAT E R S M A P ( U S A C E A P P R O VA L P E N D I N G ) , P R O V I D E D B Y A M E C F O S T E R W H EE L E R , D AT E D M AY 2 9 , 2 0 1 5 .1 0 . T H E U N I T 5 I N A C TI V E A S H B A S I N P R O V I S I O N A L C O M P L I A N C E B O U N D A RY I S D E P I C T E D P ER T H E D E F I N I T I O N F O U N D I N 1 5 A N C A C 0 2 L . 0 1 0 7 ( a) . TH E E S TA B L I S H M E N T O F T H E P R O V I S I O N A L C O M P L I A N C E B O U N D A RY I S P E N D I N G R E V I E W A N D A P P R O VA L B Y N C D E Q .
Ash Basin
(Secondary
Cell)
LEGEND
■ Approximate Pond/River Extent
■ Regolith (Shallow and Deep Flow Layers)
© Fractured Bedrock (Bedrock Flow Layer)
® Source Areas
Areas of arsenic, boron, chromium, sulfate
"J and total dissolved solids (TDS) 2L Exceedances
Unnamed Tributary with Flow Direction
mommoo Groundwater Flow Direction
�—� Cross Section Location B-B'
Note:
VISUAL AID ONLY - Depiction NOT to Scale
NC 2L Groundwater Exceedances
Arsenic - 10 ug/1(micrograms per liter)
Boron - 700 ug/1
Chromium - 10 ug/I
Ash Basin
(Primary Cell)
1
Evaporation/Precipitation
r l • 1 III,�1• 1' : 1
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F
NDR Engin—Inq, Inc. a/ Na CanclBws tJcenee Number. F-0118
440 S. Church Stroh, Suit 000, Chorttt, NC 28202-2075
SITE CONCEPTUAL MODEL - 3D REPRESENTATION
DUKE ENERGY CAROLINAS, LLC
RIVERBEND STEAM STATION
GASTON COUNTY NORTH CAROLINA
DATE
October 2015
FIGURE
3-1

1
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500
2600
HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
3000
ISSUE DATE DESCRIPTION
INTERMEDIATE DAM
AB-4S WATER
IN BASIN
®
I
'
APORATION/PRECIPITATION
SECONDARY DAM
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+ + + + +h + + + + + + + + + + + +
3400
3600
SECTION B
SCALE: HORIZ 1 "=40'
VERT 1"=10'
PROJECT MANAGER V. CARBONE
DRAWN BY:
-
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000266802
4000
DISTANCE (ft)
NOT FOR
CONSTRUCTION
■ MW-13
4200
4400
4600
B'
EAST
-1 1 750
700
CATAWBA RIVER
MOUNTAIN ISLAND LAKE 650
DUKE ENERGY CAROLINAS,LLC
DUKE
ENERGY.:
GASTON COUNTY
RIVERBEND STEAM STATION
NORTH CAROLINA
[oleo
1. CONCEPTUAL DRAWING FOR DEMONSTRATION
PURPOSES ONLY.
2. BEDROCK FRACTURES DEPICTED ON SECTION
DO NOT REPRESENT ACTUAL FRACTURE
FREQUENCY OR ORIENTATION.
LEGEND:
WATER TABLE SURFACE (JUNE 2015)
FI LL
ASH
REGOLITH
BEDROCK (FRACTURED)
++++} + } + + + LEACHATE
+++
++++++
GROUNDWATER FLOW PATH
SITE CONCEPTUAL MODEL CROSS SECTIONAL
0 1" 2" FILENAME I FIGURE 3-2.2.DWG
SCALE I AS NOTED
SHEET
FIGURE 3-2
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MW3S 645.06'MW3S 645.06'
MW6S 649.73'MW6S 649.73'
MW7S 'MW7S '
MW7SRMW7SR709.04'709.04'
MW8I 707.16'MW8I 707.16'
MW8S 709.86'MW8S 709.86'
AB1S AB1S 685.73'685.73'
AB3SAB3S706.26'706.26'
AB4SAB4S705.91'705.91'
AB5S 707.5'AB5S 707.5'
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AB7IAB7I713.78'713.78'AB7SAB7S714.42'714.42'
AB8S 656.55'AB8S 656.55'
AS1S 678.17'AS1S 678.17'
AS2DA 'AS2DA 'AS3S 713.23'AS3S 713.23'BG1S 670.96'BG1S 670.96'
BG2SBG2S651.82'651.82'
BG3SBG3S644.96'644.96'
C1SC1S653.31'653.31'
C2S 656.39'C2S 656.39'
GWA10SGWA10S643.79'643.79'
GWA1S 661.15'GWA1S 661.15'
GWA20S 'GWA20S '
GWA22S 712.92'GWA22S 712.92'
GWA2SGWA2S645.13'645.13'
GWA3S 646.21'GWA3S 646.21'GWA3SAGWA3SA645.52'645.52'
GWA4S 674.17'GWA4S 674.17'
GWA5SGWA5S710.41'710.41'GWA6S 715.45'GWA6S 715.45'
GWA7S 670.18'GWA7S 670.18'
GWA8S 671.26'GWA8S 671.26'
GWA9S 648.24'GWA9S 648.24'
MW10MW10643.74'643.74'
MW11SR MW11SR 664.68'664.68'
MW12 'MW12 '
MW13MW13643.07'643.07'
MW14MW14652.62'652.62'
MW15MW15643.74'643.74'
MW1SMW1S652.58'652.58'
MW2S 687.03'MW2S 687.03'
MW4SMW4S648.16'648.16'
MW5SMW5S643.55'643.55'
MW9MW9647.74'647.74'
OB1 707.75'OB1 707.75'OB2 675.98'OB2 675.98'
S R -2 0 7 4
SR-1912
POTEN TIOMETRIC SURFACE – S - SHALLOW GROUN DW ATER ELEV ATION S (7/8 - 10, 2015)
DUKE EN ERGY CAROLIN AS, LLCRIV ERBEN D STREAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
DATE
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!<ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
!<ASH BASIN COMPLIANCE GROUNDWATERMONITORING WELL
!<ASH BASIN VOLUNTARY GROUNDWATERMONITORING WELL
GROUNDWATER CONTOUR LINE
INFERRED CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENTWITH DUKE ENERGY PROPERTY BOUNDARY
0 0.1 0.2MILES
AUGUST 2015DRAFT: Provisional and Subject to Change UponAdditional Data Collection and Interpretation
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AB4DAB4D702.91'702.91'
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GWA2D(BRU)GWA2D(BRU)''
GWA3DGWA3D645.5'645.5'
GWA4DGWA4D673.88'673.88'
GWA5DGWA5D''
GWA6DGWA6D714.74'714.74'
GWA7D 670.98'GWA7D 670.98'
GWA8D 671.08'GWA8D 671.08'
GWA9DGWA9D653.78'653.78'
MW11DRMW11DR664.59'664.59'
MW15DMW15D643.84'643.84'
MW1DMW1D649.95'649.95'
MW2DMW2D687.39'687.39'
MW3DMW3D652.45'652.45'
MW4DMW4D647.32'647.32'
MW5DMW5D647.66'647.66'
MW6DMW6D650.63'650.63'
MW7DMW7D714.4'714.4'
MW8DMW8D705.55'705.55'
MW9DMW9D647.93'647.93'
S R -2 0 7 4
SR-1912
POTEN TIOMETRIC SURFACE – D - DEEP GROUN DW ATER ELEV ATION S (7/8 - 10, 2015)
DUKE EN ERGY CAROLIN AS, LLCRIV ERBEN D STREAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
DATE
FIGURE
PAT
H
:

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
\
R
E
P
O
R
T
_

R
I
V

E
R
B
E
N

D
_

A
N

S
I
B
_

G
W

_

C
O
N

T
O
U
R
_

D
_

W

E
L
L
_

C
O
N

T
O
U
R
S
.
M
X

D

-

U
S
E
R
:

D
S
O
U
C
I
E

-

D
A
T
E
:

8
/
9
/
2
0
1
5
!<ASH BASIN ASSESSMENT GROUNDWATERMONITORING WELL
!<ASH BASIN COMPLIANCE GROUNDWATERMONITORING WELL
!<ASH BASIN VOLUNTARY GROUNDWATERMONITORING WELL
GROUNDWATER CONTOUR LINE
INFERRED CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENTWITH DUKE ENERGY PROPERTY BOUNDARY
0 0.1 0.2MILES
AUGUST 2015DRAFT: Provisional and Subject to Change UponAdditional Data Collection and Interpretation
C

a

t

a

w

b

a

R

i

v

e

r
F
L
O
W
700'700'
680'680'
660'660'
640'640'
SR-1912
AB3BRAB3BR
583.67'583.67'
BG2BRBG2BR
693.83'693.83'
GWA23BRGWA23BR
703.38'703.38'
GWA2BRGWA2BR
645.24'645.24'
GWA7BRGWA7BR
671.01'671.01'
GWA9BRGWA9BR
541.34'541.34'
MW15BRMW15BR
643.95'643.95'
MW7BRMW7BR
711.76'711.76'
MW9BRMW9BR
648.72'648.72'
POTEN TIOMETRIC SURFACE – BEDROCK W ELLS (BR)(JULY 8-10, 2015)
DUKE EN ERGY CAROLIN AS, LLCRIV ERBEN D STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
DATE
FIGURE
3-5
PAT
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
\
R
E
P
O
R
T
_

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
_

W

E
L
L
_

C
O
N

T
O
U
R
S
.
M
X

D

-

U
S
E
R
:

G
P
O
P
U
L
I
S

-

D
A
T
E
:

1
1
/
1
3
/
2
0
1
5
LEGEND
ASH BASIN ASSESSMENT GROUNDWATER
MONITORING WELL
GROUNDWATER CONTOUR LINE
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
STREAM
N
600 0 600 1,200
SCALE (FEET)
NOVEMBER 16, 2015
C a t a w b a R i v e r
F
L
O
W
F L O W
F L O W
FLOW
6 8 5 '
6 8 5 '
6 6 5 '6 6 5 '6 4 5 '6 4 5 '
685'
685'
665'
665'685'685'
645'
645'
7 0 5 '7 0 5 '
705'
705'
7 0 5 '
7 0 5 '6 6 5 '
6 6 5 '6 4 5 '
6 4 5 '
S R -1 9 1 2
AB1DAB1D
666.2'666.2'
AB2DAB2D
678.41'678.41'
AB3DAB3D
700.2'700.2'
AB4DAB4D
702.91'702.91'
AB5DAB5D
677.13'677.13'
AB6BRUAB6BRU
663.59'663.59'
AB7DAB7D
713.48'713.48'
AB8DAB8D
658.58'658.58'
AS1DAS1D
675.39'675.39'
AS2DAS2D
695.47'695.47'
AS3DAS3D
712.53'712.53'
BG1DBG1D
674.44'674.44'
BG2DBG2D
647.96'647.96'
BG3DBG3D
644.85'644.85'
C1BRUC1BRU
549.33'549.33'C2DC2D
653.38'653.38'
GWA10BRUGWA10BRU
643.92'643.92'
GWA1BRUGWA1BRU
662.07'662.07'
GWA22DGWA22D
709.29'709.29'
GWA23DGWA23D
704.94'704.94'
GWA3DGWA3D
645.5'645.5'
GWA4DGWA4D
673.88'673.88'
GWA6DGWA6D
714.74'714.74'
GWA7DGWA7D
670.98'670.98'
GWA8DGWA8D
671.08'671.08'
GWA9DGWA9D
653.78'653.78'
MW15DMW15D
643.84'643.84'
MW1DMW1D
649.95'649.95'
MW2DMW2D
687.39'687.39'
MW3DMW3D
652.45'652.45'MW4DMW4D
647.32'647.32'
MW5DMW5D
647.66'647.66'
MW6DMW6D
650.63'650.63'
MW7DMW7D
714.4'714.4'
MW8DMW8D
705.55'705.55'
MW9DMW9D
647.93'647.93'
POTENTIOMETRIC SURFACE – DEEP WELLS (D AND BRU)(JULY 8-10, 2015)
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
DATE
FIGURE
3-6
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 \R E P O R T _R I V E
R B E N D _A N S I B _G W _C
O N T O U
R _D _W E L L
_C O N T O U R S .M X D - U S E R : G P O P
U L I S
- D A T E
: 1 1 /1 3
/2
0 1 5
LEGEND
ASH BASIN ASSESSMENT GROUNDWATER
MONITORING WELL
ASH BASIN COMPLIANCE GROUNDWATER
MONITORING WELL
ASH BASIN VOLUNTARY GROUNDWATER
MONITORING WELL
Groundwater Contour Line
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
STREAM
N
500 0 500 1,000
SCALE (FEET)
NOVEMBER 16, 2015
!<
!<
C a t a w b a R i v e r
AB-3
-3.541
GWA-7
0.001
S R -1 9 1 2
VERTICAL GRADIENT – D TO BR
DUKE ENERGY CAROLINAS, LLCRIVERBEND STEAM STATION ASH BASIN
GASTON COUNTY, NORTH CAROLINA
DATE
FIGURE
3-7
P A T H : F
:\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 \R E P O R T _R I V E R B E N D _
A N S I B _
V E R T G R A D _D T O B R .M X D - U S E R : T L E O N A R D - D A T E : 1 1 /1 5 /2 0 1
5
LEGEND
!<GROUNDWATER ASSESSMENT MONITORING
WELL
DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
STREAM
NOVEMBER 16, 2015
N
500 0 500 1,000
SCALE (FEET)