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Home My WebLink AboutNC0024406_02_BCSS_CAP Update 2019_Figures_20191231Corrective Action Plan Update December 2019 Belews Creek Steam Station FIGURES (CAP Content Section 10) SynTerra ^� DAN RIVER�� 1 f c C�r� `PARCELA ��y I '`.��•� T �4 �� ASH BASIN COMPLI�CE •�■ J BOUNDARY �- LINED RETENTION] �- l' ' .l • BASIN �} Z, )�] ) p ASH BASIN-,---,_ /i n PARCEL LINE 0 PILE I1� PLANT PINE HALL f &p ROAD LANDFILL v n S e L 'J (CLOSED) STRUCTURAL FILL (CLOSED) LUG l� FGD LANDFILL ■ ! CRAIG ROAD } r �� - • - LANDFILL SOURCE: ' L 2016 USGS TOPOGRAPHIC MAP, BELEWS LAKE QUADRANGLE, OBTAINED FROM THE USGS STORE AT https://store.usgs.gov/map-locator. DUKE COUNTY ENERGY® CAROLINAS ti^P`r vnNSTONsa w r FIGURE ES-1 USGS LOCATION MAP CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA DRAWN BY: B.YOUNG DATE: 05/15/2019 1 GRAPH ICSCALE REVISEDBY: B.YOUNG DATE: 07/08/2019 1,000 0 1,000 2,000 CHECKED BY: A. ALBERT DATE: 07/08/2019 APPROVED BY: A. ALBERT DATE: 07/08/2019 (IN FEET) PROJECT MANAGER: A. ALBERT NOTES: / 1. THE BOUNDARY OF THE AREA PROPOSED FOR GROUNDWATER REMEDIATION REPRESENTSTHE MAXIMUMAREAOF COI CONCENTRATION IN GROUNDWATER GREATER THAN CRITERIAEALTA ♦, ENVIRONMENTAL, 2019). 2. NATURAL RESOURCES TECHNICAL REPORT (NRTR) WAS PREPARED BYAMEC FOSTER WHEELER INC., JULV 2, 2015. 3.ALLBOUNDARIES ARE APPROXIMATE. p � PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. ♦ ��• ,.F ♦ ~, 0 2 ` O / 5. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. SS. DRAWG HAS BEEN SET WITH APROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE YSTEM FIINPS3200 INAD8312011 ). I , L / ti a K a/ °I I OPO NJ�C pP�P r. i' �w .N •4 LEGEND AREA PROPOSED FOR GROUNDWATER REMEDIATION ASH BASIN WASTE BOUNADRY ASH BASIN COMPLIANCE BOUNDARY PINE HALL ROAD LANDFILL (CLOSED) STRUCTURAL FILL (CLOSED) LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN _ DUKE ENERGY CAROLINAS PROPERTY LINE STREAM (AMEC NRTR 2015) 7-7 WETLANDS (AM EC NRTR 2015) GRAPHIC SCALE DUKE 600 0 600 1,200 FIGURE ES-2 ENERGY® (IN FEET) AREA PROPOSED FOR CAROLINAS CORRECTIVE ACTION DRAWN BY: J. KIRTZ DATE: 05/16/2019 CORRECTIVE ACTION PLAN UPDATE 141p REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: C. EADY DATE: 12/16/2019 BELEWS CREEK STEAM STATION APPROVED BY: C. EADY DATE: 12/16/2019 synTerra PROJECT MANAGER: A.ALBERT BELEWS CREEK, NORTH CAROLINA www.synterracorp.com I 0° a's PROPOSED / / a yo a o o- � o s ° o �48"MANHOLE � ° ° WITH AIR VENT � I a\ a FLOW i P I • p - / 48"MANHOLE? � �--_____- _----- --- wlrHAiR vENr = FLO-NOT FOR CONSTRUCTION •�/ ,�(�� r — � � W � — --- PARCEL A / 1` (2.67ACRES) D LEGEND EXISTING EXTRACTION SYSTEM WELLS EX-1 THRU EX-10 P Q PROPOSED EXTRACTION WELL IN SAPROLITE i PROPOSED ® PROPOSED CLEAN WATER INFILTRATION WELL IN SAPROLITE CLEAN PHYSICAL -CHEMICAL — _ • PROPOSED EXTRACTION WELL IN TRANSITION ZONE • WATER TREATMENT SYSTEM \ — - • INFILTRATION o — ® PROPOSED CLEAN WATER INFILTRATION WELL IN TRANSITION ZONE • HORIZONTAL WELL �i PROPOSED EXTRACTION WELL IN BEDROCK � ® PROPOSED CLEAN WATER INFILTRATION WELL IN BEDROCK PROPOSED EXTRACTION PROPOSED CLEAN WATER INFILTRATION HORIZONTAL WELL (SAPROLITE) • EX-4? COLLECTION AND PUMP STATION PROPOSED CLEAN WATER INFILTRATION PIPING 4 ° PROPOSED CLEAN WATER INFILTRATION PIPING FLOW DIRECTION PROPOSED EXTRACTION PIPING I / PROPOSED EXTRACTION PIPING FLOW DIRECTION •,' EX-6— — — — — — — DECANT PIPING FLOW DECANT PIPING FLOW DIRECTION • EX-11 DUKE ENERGY CAROLINAS PROPERTY LINE r ASH BASIN — — — — ASH BASIN COMPLIANCE BOUNDARY • EX-8 WASTE BOUNDARY EXISTING EXTRACTION ® ASH BASIN PONDED WATER SYSTEM (EX-1 THRU EX-10) NOTES / 1.) ALL BOUNDARIES ARE APPROXIMATE. 2.) DUKE ENERGY PROPERTY LINES ARE REPRESENTED SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF SURVEYED AND I APPROXIMATE LOCATIONS. THEREFORE LOCATIONS ARE DEEMED TO BEAPPROXIMATE. 3 )THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES THE TOPOGRAPHY BASED EX- ON A COMBINATION OF SOURCES. LIDAR DATA OBTAINED FROM NC FLOODPLAIN MAPPING PROGRAM -SPATIAL DATA DOWNLOAD AT htt Sdd.nc. o DaWD°wni° xN d.as Ps// B / p DATA WAS SOURCED FROM THEIR PHASE 3-2015 Q L2 LIDAR DROPOSED CLEAN WATER 4.) THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE U.S. ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS PRELIMINARY JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAM BOUNDARIES WETLANDS AND STREAMS BOUNDARIES WERE =1 LTRATIO N STO RAG E TAN K OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL AND INFRASTRUCTURE INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK Q ° STATION", DATED TUNE 2015. 5.) SITE FEATURES INCLUDING UTILITIES ARE BASED ON SEVERAL SOURCES. ANY UTILITIES SHOWN ARE FOR REFERENCE PURPOSES ONLY AND HAVE NOT BEEN 'ER APPROXIMATELYITHR DARDSTOTHEIR HORIZONTAL ORVERTICAL LOCATIONS INTHE FIELD. ALL FEATURES INCLUDING UTILITIES ARE DEEMED TOBE 2017 AERIAL PHOTOGRAPHS OBTAINED FROM NC ONE MAP AT https://n nemap.maps.arcgis,com/apps/web,ppviewer/,,de.hlm171d=2c8a9b366c4841f1be2b464347dO4a2b 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM WSP FLOWN ON APRIL 17, 2014. O 6.) DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIP 3200 (NAD83 AND NAVD 88. o GRAPHIC SCALE DUKE 200 0 100 200 A' ENERGY IN FEET FIGURE ES-3 CAROLINAS DRAWN BY: J. CHASTAIN DATE:12/15/2019 PROPOSED CORRECTIVE ACTION APPROACH REVISED BY: DATE:- CORRECTIVE ACTION PLAN UPDATE APPROVED BY, J. CL MMER DATE:12/15/2019 BELEWS CREEK STEAM STATION PROJECT MANAGER: A. ALBERT BELEWS CREEK, NORTH CAROLINA W/Tear www.synterracorp.com DAN RIVER --. NJ ., � 1 `PARCEL � � _ �� ■ �� C1. ASH BASIN COMPLIANCE; � •� �� ti� X. BOUNDARY LINED RETENTION i BASIN �� - �,■] : �� ASH BASIN � �� PARCEL LINE 5 � COAL PILE zi ( 5� _ o ■ n PINE HALL ROAD LANDFILLJ, \ � , , o r, (CLOSED) t V STRUCTURAL FILL � K1 � ] (CLOSED) C7 SOURCE: � L 2016 USGS TOPOGRAPHIC MAP, BELEWS LAKE QUADRANGLE, OBTAINED FROM THE USGS STORE AT https://store.usgs.gov/map-locator. STOKES 4� DUKE COUNTY ENERGY® CAROLINAS ti P �s-wNsroNse POWER PLANTN-=�f n CRAIG ROAD, r//LANDFILL -_ 1 U v FGD LANDFILL w FIGURE 1-1 USGS LOCATION MAP CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA DRAWN BY. C. WYATT DATE: 09/11/2019 1 GRAF ICSCALE REVISED BY. C. WYATT DATE: 12/04/2019 1,000 0 1,000 2,000 CHECKED BY: A. ALBERT DATE: 12/04/2019 APPROVED BY: A. ALBERT DATE: 12/04/2019 (IN FEET) PROJECT MANAGER: A. ALBERT 7 - FORMER UNT 2_DNSOC ♦ • • q� OUTFALL 003 S_5 p0 GWA-24S OUTFACE 111 ` .M` -O=LOOP • • SD-BL-D ) . - - _ 02 .. GGWWAA--2211DS - GG-WWAA--1111SD EX_-1 CCR-13S . �` oQ s 1S1-10GWA-24Df. CC - •~ . • • 'GWA-24BR S-10 MW-200GWA-32S 0 0CCR-4S 13r -• GWA-1MW-200D BG-2S CCR-D GWA30S-11 BG-1S BGSB-2 CCR-4D MW-200BR BGSB-1 BG-2D BG-1 D EX0B1 CCR-136R GW0D GWA-16R g_18 R ■ S-3 S_3 BG-2BRA� y ♦ - -SD4-B! "L- -DI 2 kS*,E S-a `CCR-6S CCR-7D MW-103D GWA-2S ■�� .. SB-3 CCR-8SEX-3 i A CCR-6DCCR-8DGWA-27S -MW-201 D ,GWA-27D 4 S_2 •GWA-31S � � AB-3S W-201BR � GWA-22S GWA-27BR -5 AB-2S ^ AB-1S fi GWA-22D ' G ; A-31 D Q I �� AB-1 D AB-2D AB-3D �,■ ,� . . ► EX-7 �+ CCR-5S AB-2BR/BRD AB-3BR S-6 1■ i GWA-19SA AB-1BR/BRD CCR-5D CCR-9S EX-8 i GWA-19D CCR-9D �+S-s/BL SD-BL-S-6 `GWA-3S CCR-2S EX-9 GWA-196R MW-101S/D CCR-11S GWA-3D CCR-2D EX-10 GWA-10S CCR-11D ■ ,A • J-I 'YVVUH-IOi / "' ' S-1 ■ LRB-1BR GWA-18SA :�•:a;.. GWA-18D �. _ •.� -.' ■, 3s. CCR-12S L - GWA-17S , ;.F::r; �.r .. }:+?r. • -.•� - CCR-12DA ` S-14 LEGEND GWA-17D MW-204S tit + _ LRB-2S SD-BL-S-13/14 GWA-16S MW-204D - - _ - .r; � MONITORING WELL IN ASH PORE LRB-2D GWA-16D/DA,*,r,�.°'• -•- LRB-2BR MONITORING WELL IN SHALLOW ZONE OUTFACE 006 • GWA-16BR MONITORING WELL IN DEEP ZONE 8 2 DRDNSOC �SD-DR _ .' MONITORING WELL IN BEDROCK ZONE • AB-5S/SL SD-DR-D AB-5D %�B-IGTB Mw-104s.10 MONITORING WELL AB-as/SLEXTRACTION WELL IN DEEP ZONE MW-203S MW-104D w SD-DR-U �•'4 AB-4SAP "'AB-5 FgsT E 2 DRUPSOC SD-DR-1 I MW-203D • y _ i+ MW-1046RA Fqq� ■ EFFLUENT WATER SAMPLE LOCATION MW-203BR AB-4D AB-4-LOWERASH // a SD-DR-3� .► • F �� " AB-4BR/BRD ; CgNrRp ■ SURFACE WATER SAMPLE LOCATION SD-DR-TFC .- SOIL SAMPLE LOCATION •'` SD-DR-BG i ► �� ♦- / ♦ ♦ +) AB-8S/SL NON -CONSTRUCTED SEEP MONITORED UNDER SOC SD-DR-2 '". X AB-8D GWA-6S S 7 r l APPROXIMATE :.. Fi `...� `- GWA-9GTB OB_5 ^ �a GWA-6D SD-BL-S-6 (APPROXIMATE) .._..... -- ... % II■ oe-4 '' AB-9s , CP-3S O DISPOSITIONED SEEP (APPROXIMATE) OUTFACE 002 i, AB-9BR/BRD �� J CP-3D SEEP PART OF NPDES WASTEWATER TREATMENT i " • • / ,a CP-1S CP 2D CP-3BR SYSTEM (APPROXIMATE) .f MW2 1 MW2-7 w • GWA 7SA CP-1D CP-2BR ❑ IN -STREAM SURFACE WATER SAMPLE LOCATION ` a► PER SOC APPROXIMATE l MW-5 GWA-7D CP-1 BR CP-4S (APPROXIMATE) MW2-9 % CP-4D ❑ SEDIMENT SAMPLE LOCATION - .... + .. .';• o OB_9 . • , i , i a 4*MW GWA-8S�_ _•W-7 GWA-SDCP-5S A NPDES OUTFALL LOCATION SFMW-2D.• CP-5Dp'- • WATER SUPPLY WELL CP-8BR CP-5BR.��5 cPas _ — ASH BASIN WASTE BOUNDARY GWA-26S MW-1D / r _ r GWA-23S SFMW-1D sFMw-sD CP-7BR CP-6Si` • — - — - ASH BASIN COMPLIANCE BOUNDARY GWA-26D �•'- _ r LANDFILL BOUNDARY (CLOSED) SFSW-1DE CP-6D •� REGIONAL INSET SCALE: 1 " = 3, 500' • GWA-266R r GWA-23D - „ • GWA-25BR - MW-1 r MW-2 MW-6 S 9 SFMW-1BR SFMW-4D _ CP-6BR•f STRUCTURAL FILL BOUNDARY (CLOSED) �, ,' . „ ,.�ti. • � �, S_9 P � LANDFILL COMPLIANCE BOUNDARY ', r �' • • S_8 GWA-12S SFMW-3D - OUTFALLOOs ''�.° • I -- S-8 GWA-12D SFMW-7S LINED RETENTION BASIN NOTES: BG-3S SFMW-6D BGSB-3 GWA-12BR GWASB-12 SFMW-7D ' COAL PILE STORAGE 1. SOC - SPECIAL ORDER BY CONSENT BG-3D , - DUKE ENERGY CAROLINAS PROPERTY LINE 2. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF SURVEYED I - •• OUTFACE 007 ;f' - _ AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED 1 STREAM (AMEC NRTR) APPROXIMATE - 3. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT + Mw-2025 WETLAND (AMEC NRTR) THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL MW-202BR DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM MW-202D _ GRAPHIC SCALE AMEC FOSTER WHEELER ENVIRONMENTAL &INFRASTRUCTURE, INC. NATURAL RESOURCE • � r - - � .: � f 500 0 500 1,000 TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 1 �- - - - DUKE 4> ENERGY® FIGURE 1-2 4. ALL BOUNDARIES ARE APPROXIMATE. + -� .� - - ^ CAROLINAS ON Feer� SITE LAYOUT MAP 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. DRAWN BY: C. WYATT DATE:09/09/2019 CORRECTIVE ACTION PLAN UPDATE 6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS ^ - •' REVISED BY: C. WYATT DATE: 12/04/2019 BELEWS CREEK STEAM STATION COLLECTED ON FEBRUARY 3, 2019. •� CHECKED BY: A. ALBERT DATE: 12/04/2019 APPROVED BY: C. EADY DATE: 12/04/2019 BELEWS CREEK, NORTH CAROLINA 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE' "-'• • • '�I Terra PROJECT MANAGER: A. ALBERT RIPS PS 3200 (NAD83). .'Y -'�'; _"�syn�•= �" www.synterracorp.com I r hi �l rl I I I L DUKEENERGY PARCEL LINE SOURCE: APRIL 15, 1966 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE AT http,.//earthexplorer.usgs.gov/ V DUKE ENERGY CAROLI NAS 16AV synTena GRAPHIC SCALE 275 0 275 550 IN FEET DRAWN BY: J. CHASTAIN DATE: 8/16/2017 REVISED BY: C. NEWELL DATE: 12/20/2019 CHECKED BY: D. AVARD DATE: 12/20/2019 APPROVED BY: A.ALBERT DATE:12/20/2019 PROJECT MANAGER: A. ALBERT www.synterracorp.com FIGURE 1-3 1966 AERIAL PHOTOGRAPH CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 0 SD-DR-TFC � SD-DR-BG2 " AS MIDDLETON LOOP 1 ■ I r �r l Lf l m.- -- �k T. M � s SD-DR-TFC ISD-DR-BG •• '1 f r R ■ y. QO . • I ♦ r ♦ . - 1 • L -. r r BG3S BG-3D L SD-BL U2 7jj - .' M W-202S '-1 MW-202BR MW-202D REGIONAL INSET SCALE: 1- = 4,5001 ■ • BJ � n• • BG-2D 5 BG-2BRA ' [ELE TEA P� 0 LEGEND O GROUNDWATER SAMPLE • SOIL SAMPLE LOCATION • SURFACE WATER SAMPLE O SEDIMENT SAMPLE • WATER SUPPLY WELL ASH BASIN WASTE - — - ASH BASIN COMPLIANCE LANDFILL BOUNDARY STRUCTURAL FILL BOUNDARY LANDFILL COMPLIANCE LINED RETENTION BASIN COAL PILE STORAGE - - DUKE ENERGY CAROLINAS PROPERTY STREAM (AMEC NRTR) WETLAND (AMEC NRTR) NOTES: 1. *ABANDONED MONITORING WELL LOCATION. 2. SD PREFIX INDICATES A SEDIMENT SAMPLE ID. 3. SW INDICATES SURFACE WATER. 4. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR • JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 5. ALL BOUNDARIES ARE APPROXIMATE. 6. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 7. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. �'' •• 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). GRAPHIC SC LE (►� DUKE ENERGY® 500 O 1,000 CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 04/02/2019 REVISED BY: C. WYATT DATE: 12/04/2019 CHECKED BY: A. ALBERT DATE: 12/04/2019 APPROVED BY: A. ALBERT DATE: 12/04/2019 synTerra PROJECT MANAGER: A. ALBERT www.synterracorp.com FIGURE 4-1 BACKGROUND SAMPLE LOCATION MAP CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA SITE FEATURES KEY GROUNDWATER FLOWS FROM RIDGES THAT COINCIDE WITH O GROUNDWATER DIVIDES WHICH PROVIDE HYDRAULIC CONTROL WITHIN THE FORMER STREAM VALLEY AND AWAY FROM POTENTIAL RECEPTORS AND WATER SUPPLY WELLS ® LIMITED COI MIGRATION THROUGH INTERCONNECTED BEDROCK FRACTURES. BEDROCK FRACTURE OCCURRENCE AND APERTURE DIMINISHES WITH DEPTH OFORMER STREAM CHANNELS IN ASH BASIN O PONDED WATER IN THE ASH BASIN CAUSES LIMITED AREA OF DOWNWARD VERTICAL MIGRATION OF CONSTITUENTS NEAR THE DAM DUE TO ELEVATED HYDRAULIC HEAD UPWARD VERTICAL GRADIENTS IN GROUNDWATER O IMMEDIATELY DOWNGRADIENT OF THE ASH BASIN DAM LIMIT VERTICAL MIGRATION OF CONSTITUENTS UNITS NOT CONSIDERED HYDRAULICALLY ASSOCIATED WITH ASH BASIN DUE TO GROUNDWATER DIVIDES. ADDITIONAL ASSESSMENT BEING CONDUCTED UNDER NCDEQ OVERSIGHT. COAL PILE AND STRUCTURAL FILL ASSESSMENTS ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. AREA OF COI CONCENTRATION IN GROUNDWATER GREATER THAN CRITERIA (SEE GENERAL NOTE 1) GENERALIZED GROUNDWATER FLOW DIRECTION GENERALIZED ASH PORE WATER FLOW DIRECTION STREAM -- j APPROXIMATE FORMER STREAM ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY LANDFILL WASTE BOUNDARY LANDFILL COMPLIANCE BOUNDARY SITE FEATURES OGENERAL AREA OF WATER SUPPLY WELL USERS (SEE GENERAL NOTE 2) INTERIM ACTION GROUNDWATER EXTRACTION SYSTEM - - BEDROCK FRACTURE ORIENTATION GENERAL NOTES 1) GENERALIZED AREAL EXTENT OF MIGRATION REPRESENTED BY NCAC 02L, IMAC, OR APPROVED BACKGROUND THRESHOLD VALUE EXCEEDANCE OF BORON CONSTITUENT IN MULTIPLE FLOW ZONES. OTHER CONSTITUENT OF INTEREST THAT EXCEED THE CRITERIA ABOVE ARE WITHIN THE BORON CONSTITUENT AREA. 2) PERMANENT WATER SUPPLY HAS BEEN IMPLEMENTED PROVIDING 36 SURROUNDING WELL USERS WITH WATER TREATMENT SYSTEMS, THIS WORK WAS COMPLETED IN ACCORDANCE WITH HB630 AND SUBSEQUENTLY APPROVED BY NCDEQ ON OCTOBER 12, 2018. 3) ALL BOUNDARIES ARE APPROXIMATE. 1 NORTH CONCEPTUAL CROSS-SECTION OF PRE -DECANTING CONDITIONS ■ (NOT TO SCALE - APPROX, 5,500 L/NEAR FEET) (830 ELEV.) (630 ELEV.) I aft, ® I F-01111 TRIB i i /10, 1 MIDDLETON LOOP U TR 'DUKE ENERGY CAROLINAS 41P synTerra VISUAL AID ONLY - DEPICTION NOT TO SCALE DRAWN BY: A. FEIGL DATE: 6/2/2019 REVISED BY: C. NEWELL DATE: 12/13/2019 CHECKED BY: D. AVARD DATE: 12/13/2019 APPROVED BY: A. ALBERT DATE: 12/13/2019 PROJECT MANAGER: A.ALBERT www.synterracorp.com FIGURE 5-1 CONCEPTUAL SITE MODEL - PRE -DECANTING CONDITIONS CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA Corrective Action Plan Update December 2019 Belews Creek Steam Station Figure 5-2 Legrand Slope Aquifer System Included in Section 5 text SynTerra Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 5-3 General Profile of Ash Basin Pre -Decanting Flow Conditions in the Piedmont Included in Section 5 text Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 5-4a Water Level Map — Shallow Flow Zone (April 8, 2019) Provided in separate electronic figure file as a large sheet size Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 5-4b Water Level Map - Transition Flow Zone (April 8, 2019) Provided in separate electronic figure file as a large sheet size Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 5-4c Water Level Map — Bedrock Flow Zone (April 8, 2019) Provided in separate electronic figure file as a large sheet size /Aff lot 16 LEGEND ASH BASIN WASTE BOUNDARY ' �`� ��• �`� �*�� ~ �.�� ,� ASH BASIN COMPLIANCE ��' LINED RETENTION BASIN INN,;' } �� '�� ,t�� . %:Z:' — - - — DUKE ENERGY CAROLINAS PROPERTY STREAM (AMEC NRTR) �► �� •� �� NOTES: �� +�• � +�+� *� �� 1 � 1� �-�� y � �� :-��+ � � �� •�� y� *� �� — - � 1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). r� �� • ram• f+�' �� y� �� +� F� F ��1 •, 2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. 3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS. � � � • �� { �� ; �� * r r � � y� �� 4. MODEL LAYER 16 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT w� •� • �* �� + �� + ■ �r �� - w� �� MODELING REPORT FOR BELEWS CREEK STEAM STATION, BELEWS CREEK, NC, �do *— r OCTOBER 2019 (FALTA, GRAZIANO, YU & MURDOCH, 2019) r •�� r {� �� 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF y r+ •�►�f �_ r� �� = ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY ro ��+► �+ �w !� 4� +� •f �� •fi �~ �� JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER • i �`� � f f ENVIRONMENTAL &INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL _+ t+ REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. ;`� 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). —W ` 7! ` • GRAPHIC SCALE FIGURE 5-5a DUKE ENERGY. 250 0 250 Soo VELOCITY VECTOR MAP �0 CAROLINAS (IN FEET) FOR PRE -DECANTING CONDITIONS DRAWN BY: C. WYATT DATE: 10/04/2019 DEEP FLOW ZONE REVISED BY: C. WYATT DATE: 12/16/2019 �` • —�" --" �� CHECKED BY: A.ALBERT DATE:12/16/2019 CORRECTIVE ACTION PLAN UPDATE �� } ' APPROVED BY: A.ALBERT DATE:12/16/2019 BELEWS CREEK STEAM STATION �� i.► �y sy �� ` j PROJECT MANAGER: A. ALBERT `" 111 i 1 f synTerra BELEWS CREEK, NORTH CAROLINA � '� � � � �; I' t www.synterracorp.com .7 LEGEND • Xl- PROPOAECOMRID LANDFILL WASTE EXTENT ASH BASIN COMPLIANCE BOUNDARY t �+�f� �� LINED RETENTION BASIN DUKE ENERGY CAROLINAS PROPERTY STREAM (AMEC NRTR) NOTES: •� � i � � Fl� 4i� 4`� `� \� � � � - � 1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). �� '�1 J]�r� �� l �� { ��■ ��\ ��\ �� • 2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. 3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS. �.�� .� ■ r ��{1l �`�� \ �� \ �� \ �� 4. MODEL LAYER 16 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR BELEWS CREEK STEAM STATION, BELEWS CREEK, NC, OCTOBER 2019 (FALTA, GRAZIANO, YU & MURDOCH, 2019). 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF r+ fr *{l ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL NN REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. �� '�� # } +�� ! �� { �� f ■ ��•� �� . 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE 11 11 a 11 {1 11 COORDINATE SYSTEM FIPS 3200 (NAD83). 250 ORAPHICSC250 500 FIGURE 5-5b !> DUKE ENERGY VELOCITY VECTOR MAP FOR CAROLINAS (IN FEET) CLOSURE -IN -PLACE CONDITIONS (HYBRID) DRAWN BY: C.WYATT DATE:10//2019 DEEP FLOW ZONE ij 777 111 L REVISED BY: C. WYATT DATE: 12/1616/2019 } CHECKED BY: A. ALBERT DATE:12/16/2019 CORRECTIVE ACTION PLAN UPDATE �� ' PROJECT MANAGER: A. ALBERT APPROVED BY: A. ALBERT DATE: 12/16/2019 BELEWS CREEK STEAM STATION F� �� rt �+ at t 1r11 11 Terra BELEWS CREEK, NORTH CAROLINA + www.synterracorp.com .. '\ON 401 LEGEND 0/0 14 ' � � � �i*t` �� •�� <"� � �� tip~ ti�� -�� -�� -� %N Amu PROPOSED NORTH LANDFILL WASTE EXTENT (AECOM) t ASH BASIN COMPLIANCE BOUNDARY ~ �� ♦�,�� .�� LINED RETENTION BASIN DUKE ENERGY CAROLINAS PROPERTY LINE STREAM (AMEC NRTR) ,-� NOTES: 1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). �� F �� r �� w� F� f� �� +� ` ' •, 2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. -Z +Z � � 3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS. 4. MODEL LAYER 16 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR BELEWS OCTOBER 201CREEK 9 (FALTA, GRAZIANO YU& MURD CH, 2001 9),BELEWS CREEK, NC, �� s� r r� �� r� ■ r� F� 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF �� +� ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL �� ,� ++ � ~� �� +� �� •T �� STREAMS OUNDARIES WERE1ON 06TANLY. THE PRELIMINARY WETLANDS NED FROM AMEC FOSTER WHEELER D db�Wr r 4+ +-- *�+*�` ��'�� ~ �� ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL 0 REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. � sy �►� �r�` �� w��^+�� 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE N� �� COORDINATE SYSTEM FIPS 3200 (NAD83). —o GRAPHIC SCALE FIGURE 5-5c i DUKE �> ENERGY. 250 0 250 500 VELOCITY VECTOR MAP FOR CAROLINAS (IN FEET) CLOSURE -BY -EXCAVATION CONDITIONS DRAWN BY: C. WYATT DATE: 10/04/2019 DEEP FLOW ZONE � 111 !J REVISED BY: C. WYATT DATE: 12/16/2019 �� CHECKED BY: A. ALBERT DATE:12/16/2019 CORRECTIVE ACTION PLAN UPDATE APPROVED BY: A. ALBERT DATE:12/16/2019 BELEWS CREEK STEAM STATION 1,1 synTerra PROJECT MANAGER: A. ALBERT BELEWS CREEK, NORTH CAROLINA - ZZ www.synterracorp.com 1. THE DAN RIVER (CLASS WS-IV, WS-V) AND BELEWS RESERVOIR (CLASS WS-IV) ARE WATERBODIES LOCATED WITHIN 0.5 MILES OF THEASH BASIN COMPLIANCE BOUNDARY. 2. GROUNDWATER -TO -SURFACE WATER (02L- 02B) SAMPLE WERE COLLECTED TO ASSESS WHETHER GROUNDWATER MIGRATION IS CAUSING CONSTITUENT CONCENTRATIONS IN THE DAN RIVER AND BELEWS RESERVOIR TO BE GREAT THAN APPLICABLE 02B STANDARDS. 02L- 02B SAMPLING WAS CONDUCTED FROM FEBRUARY 12 THROUGH 15, 2018 FOLLOWING DIVISION APPROVED LOCATION AND PROTOCOLS. IN THE FIVE DAYS PRIOR TO SAMPLING A TOTAL OF 2.38 INCHES OF RAINFALL WAS OBSERVED AT THE BELEWS CREEK STEAM STATION. DURING THE FOUR DAY SAMPLING EVEN A TOT OF 0.04 INCHES OF RAINFALL WAS OBSERVED AT THE BELEWS CREEK STEAM STATION. 3. TURBIDITY WAS GREAT THAN THE APPLICABLE 02B STANDARDS AT THE FOLLOWING 02L- 02B SAMPLE LOCATIONS DURING THE FIRST THREE DAYS OF SAMPLING: SW-DR-BG, SW-DR-BG2, AND SW-DR-TFC, SW-DR- 1, SW-DR-2, SW-DR-3, AND SW-DR-4 4. NO COI CONCENTRATION WERE GREATER THAN THE APPLICABLE 02B STANDARDS IN 02L- 02B SAMPLES COLLECTED AT THE BELEWS CREEK STEAM STATION. fit �� r�� ; ♦, ,♦•, ♦ �i ♦I •�' UNT 2_DNSOC o �'• ■- ' s-e FORMER '� o ♦♦♦ ♦� ' OUTFALL 003 ♦♦ ' ♦ 1 S_3 S_q �iOUTFALL111 s-» .�..—►-.�♦,.i-,�.•� ,♦ sl *71 � . � ♦ • D 3 DNSOC / � � � . / • �, S 13 � ♦ lll� � l.� ookep °2� v /i °wFRST � LEGEND �♦ °°°i % • F�M <4yr ■ 02L-02B SAMPLE LOCATION ,� j t` �I S_7 ; ■ SURFACE WATER SAMPLE LOCATION • / wV� �� ® / O NON -CONSTRUCTED SEEP MONITORED UNDER THE ' I SOC (APPROXIMATE) OUTFACE 002 • DISPOSITIONED SEEP (APPROXIMATE) PART OF NPDES WASTEWATER TREATMENT SYSTEM ■�0 7 j/ ,I (APPROXIMATE) o ��'-�1 '{� '0� / IN -STREAM SURFACE WATER SAMPLE LOCATION ♦ • • �� •El PER SOC (APPROXIMATE) Z�b �.� • , , , •Ii I � '-. - - i' �� • A NPDES OUTFACE LOCATION r= 0.5-MILE RADIUS FROM ASH BASIN COMPLIANCE RAW WATER — . — . ♦ .....�.,tP1HeNN``�O'••'• �: v • , : INTAKEPLANT BOUNDARY ASH BASIN WASTE BOUNDARY OPERATIONS � � ^ • • s-3 � - OUTFACE 001 A • ; �,� � S_9 ♦ OUTFALL005 LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) ' •� •� 0� — - — - ASH BASIN COMPLIANCE BOUNDARY 0�� OUTFACE 007 � ♦� �� LANDFILL COMPLIANCE B01JNDARY VUTNERK\NO'RRD ♦``� 1••.• �'�• LINED RETENTION BASIN p ♦� 1•+•'� '�..�•� '�,• � �.'�• COAL PILE STORAGE AREA i '��L -----.------- ----� —••—• DUKE ENERGY CAROLINAS PROPERTY LINE �,•t•'—••—••—� F_z_DNsoc STREAM AMEC NRTR 1 OTES: THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE AP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND TREAMS BOUNDARIES WERE OBTAINED FROMAMEC FOSTER WHEELER ENVIRONMENTAL& INFRASTRUCTURE, INC. ATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. ALL BOUNDARIES ARE APPROXIMATE. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON EBRUARY 3, 2019. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). JL 40DUKE ) ENERGY® CAROLINAS GRAPHIC SCALE 700 0 700 1,400 (IN FEET) DRAWN BY: C. WYATT DATE: 09/09/2019 REVISED BY: J. DATE: 12/29/2019 CHECKED BY: A. ALBERT DATE: 12/29/2019 A. ALB APPROVED BY: A. ALBERT DATE: 12/29/2019 s)mTerra PROJECT MANAGER: A. ALBERT www.synterracorp.com WETLAND (AMEC NRTR) FIGURE 5-6 MAP OF SURFACE WATERS CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA BC-2 PERDUE HOLCOWRD BC-29 BC-32 BC-30 OLD PLANTATION RD BC-28 BC-35 BC-23-2 BC-23-1 Bc-zoo7 Bc-zozs Bc-2000 BC-33 � r �•r • / ' BC-23-4 I 1 / ♦ BC-23-5 I •/ ♦ � '•♦ BC-23-3 •♦ „ . �•I D-46 ••I oil Y ��•• =.•r• ' D-27 u � •I •�••�.• BC-2021 � O BC-2025 � I• Dp-10 •• 1 � o • •I Alk i ` • MIDD _ETON LOOP o BC-2022 BC-2027 ..''�..• A j BC-1 BC-2037-C 1 BC-2037 1 •, • • � II 4 BC-2o09 / l� )11 BC-2010 • 'I o .0` ec-zoos Bc-zols �o Bc-zols r 4 '■ ■ ■ Bc-2oao % ■ • ■ �% P BC-2013 ' •rj •• BC-2o17 •� � ■ .ram•• ■ ,r..• BC-2004C BC-2014 BC-1002 D-42 �P`'LµD••' , BC-2004 IC-2034 : .. spPiO N �v; C-2031 �. BC-2003 BC-8 . Bc-zo11 1 BC-2034C D-61 BC-2005 ' •• BC-2034C BC-2006 D-5I, • BC-2031 C D-67 D-12 11-10 BC-2002 BC-2034C jll� MPR'C1N LOtN0, MNO dR RO BC-2036 ❑ BC-2012 ; +!.•`• �, "•'1 rc Z i/ `/ oLkFa i/ RSrFgMa I� COAL PILE OPO RPV\,P GRAPHIC SCALE DUKE 625 0 625 1,250 ENERGY® CAROLINAS (IN FEET) DRAWN BY: C. WYATT REVISED BY: C. WYATT DATE: 11/22/2019 DATE: 12/29/2019 CHECKED BY: A. ALBERT DATE: 12/29/2019 APPROVED BY: A. ALBERT DATE: 12/29/2019 PROJECT MANAGER: A. ALBERT LEGEND BELEWS RESERVOIR • WATER SUPPLY WELL ASH BASIN WASTE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) — - — - ASH BASIN COMPLIANCE BOUNDARY LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA —••—• DUKE ENERGY CAROLINAS PROPERTY LINE STREAM (AMEC NRTR) WETLAND (AMEC NRTR) NOTES 1. INFORMATION PROVIDED IN BELEWS CREEKHB 630 PROVISION OF PERMANENT WATER SUPPLY COMPLETION DOCUMENTATION, DUKE ENERGY, AUGUST 31, 2018 (APPENDIX D ). 2. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 3. ALL BOUNDARIES ARE APPROXIMATE 4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS 5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). FIGURE 5-7a WATER SUPPLY WELL SAMPLE LOCATIONS CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA • • • 'P° • ' • o • • MIODLETpN Lppp p • • ,♦ �• LEGEND • WATER TREATMENT SYSTEM OPT OUT OR NON -RESPONSIVE LOCATIONS DEEMED NOT ELIGIBLE PER HOUSE BILL 630 (BUSINESS/CHURCH/SCHOOL) BUT VOLUNTARILY SUPPLIED PERMANENT WATER SOLUTION i t • VACANT PARCELS WITHIN HALF -MILE RADIUS b • WATER SUPPLY WELL • _ _ _ 0.5-MILE RADIUS FROM ASH BASIN COMPLIANCE BOUNDARY 8 ; ASH BASIN WASTE BOUNDARY s .► : LANDFILL BOUNDARY (CLOSED) • '� �� STRUCTURAL FILL BOUNDARY (CLOSED) ASH BASIN COMPLIANCE BOUNDARY LAND�°`°o� kFpp�FR SrF9g�A � ♦ FILL L NEDRETEONT' PLIANCE BOUNDARY ON BASIN <AryT'PO I COAL PILE STORAGE —••—• DUKE ENERGY CAROLINAS PROPERTY LINE )► STREAM (AMEC NRTR) WETLAND (AMEC NRTR) • r 1 • 7 1 • '0 1 t O� I NPVV 0.p • • • • PANE � I PP��ppo ♦' ♦ I � GRAPHIC SCALE DUKE 625 0 625 1,250 ENERGY N FEET, DRAWN BY: C. WYATT DATE: 11/22/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED • ► - - - - �' BBY: A.A APPROVED ALLBERT DATE: 12/16/2019 synTerra PROJECT MANAGER: A. ALBERT www.synterracorp.com NOTES 1. INFORMATION PROVIDED IN BELEWS CREEK HB 630 PROVISION OF PERMANENT WATER SUPPLY COMPLETION DOCUMENTATION, DUKE ENERGY, AUGUST 31, 2018 (APPENDIX D ). 2. NON -DUKE PARCEL BOUNDARIES PROVIDED BY NC ONEMAP, DATED 2018. http://data.nconemap.gov/downloads/vector/parcels. 3. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 4. ALL BOUNDARIES ARE APPROXIMATE 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS 6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). FIGURE 5-7b HB 630 PROVISION OF PERMANENT WATER SUPPLY COMPLETION MAP CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 6-1 Fly Ash and Bottom Ash Interbedded Depiction Included in Section 6 text A --a (SOUTH) - A' (NORTH) f STRUCTURAL FILL COMPLIANCE BOUNDARY a m oDo o N DAN RIVER r2 is Q Q y u O � �' r Q Iz. 900 N a �'c7„ m 8 �� a o rnomm 900 f/i O m m Q C' G' J � N I FILL vi z - T01OfOf J fAOYO�YY m mmmm ay0 ay0ro �J �� 1 1NNN aaaa d. m00000Cmm mm00 110 mSAPROITE ' I �Q Q Q -FILL u800 \ N 800 ASH FILL APPROX. WATER LEVEL-747.6' mASH PORE WATER ASH PORE WATERO O O TRANSITION ZONE N N N COMPLIANCE 700 \ — 1 i /\_' \ \ 1 SAPROLITE /BOUNDARY 700 _ TRANSITION ZONE I// / \` ' T I • / \\/ I / \` / \ / \�/ \ , •I / \ I \ / / SAPROLITE UNNAMED TRIBUTARY oo I*A\/\ /1,/1,1,/1,/1, / \ / __ CO 00 �'�i� [.-� _ 1 ' /.-/ \ - 1 /\- \ 1 /.-�T \ /\-f�-- \ - 1 ' /\ \ - \ j /`-- \ - \ ' /\- - 1 /\-- \ - 1 ' / ' \ \ j /\-- \ - 1 ' /\- - \ /.-� \ - 1 ' 1 : \ - j /`- \ - 1 /\-_ \�. / 00 ' 600 /\li \/I/\/�\/I/\/i�'I/\/i/\ i \/I"Ni/\/I/\/i/I/\/ 1/ /\li \/I/\/il\/I/\li \/I/\/i/\� \/1�(G/\/I/\/i \/I/\/i/\ I/ \t/\ \li \/I/l\/I I 600 1 / / \I \ / I ♦ / / \I \ / I \ / / \I \ / - ♦ / / \I \ / I \ / / \I \' -}-f� / \I \ / I \ / I ♦ / I I ♦ / I \ / I ♦ / > /1,�\/\ /1 \ /1,\/\ / /\ /1,�\/\ /1 \ \ /1 \/\ /1 \ /\ /1 ` 1 > \ i BEDROCK / \ / \ \ / _ \ / \ / _ \ \ / _ \ / _ \ / \ \ / \ / _'\� l\ \ / - 1 ' \ \ / _ • • \ ' \ \ ? / \il\ / Z \ \ I \ I _ _-500 \ \ I \ \ I \ \ I \ O\TT/1�\/\I/1\/\I/1'\/\I/1\/\I/1\'\/\I/1�\/\I/1\'\/\I/1\/\I/1\/\/\I/1,\/\I/1\'\/\I/1\/\I/1'\/\I/1,\/\I/ \' /\I/1\�� _O BEDROCK >400\/\I/\/\I/1`\`L\I/1\\I_/\I/1\/\I/1\�jl\/1 \ /\ ♦'_ _ F I \/ I I \/ I I \/ I \/ I LJJ / \ ; \ /I - \\ \ ; /I / \ - � � \ /I - \\ \ \ /I / \- � � \ /I - \\ \ ; /I ` � \ /I - \\ \ � \ /I / \- ` � �I _�\\i' �Imo\ T \\i � 4-_-\ \ I _ \ i / I / \ i � \ /I \\i � / I / \ i /I � \\ \ � \ /I � \_/I W /\/\I/1�'\/\I/1/'\/\I/1/'\/\I/1//\/\I/1,�\/\I/1/'\/\I/1�'\/\I/1/'\/\I/1/\�\\I/1♦/\'/1/�\/\I/1\'\/\I/1//\/\I/1\/\�I/�'\/\I/1♦�\\I/1��/\I/1\'\/\I/1/�\/\I/1♦/\/\I/1, —300 /\/I/\/� l\/I/\lamy `\/\I/1♦' \/\I/1♦ �\/\I/1\' \/\I/1\ �\/\I/1♦ / \/\I/1\ �\/\I/1\'\/\I/1\ �\/\I/1\ / \/\I/1\ �\/\I/1\'\/\I/1\ �\/\I/1\' \/\I/1\ �\/\I/1\ / \/\I/1\ �\/\I/1♦'\/\I �\ `\/\I/1\ / \/\I/1\ �\/\I/1♦ 200 / \` / \\/ I / \ i / \\/ I / \ / \ I / \ i l \\/ I / \` / \\/ I / \ i l \\/ I / \\ / \ I / \ i l \\/ I / \\ / \ I / \ i l \\/ I / \` / \\/ I / \ i l \\/ I / \` l \ I / \ i l \\/ I / \` / \\/ I / \ i l \\/ I / \` l \ I / \ i l \\/ I / \ l `\/ I / \ i l \\/ I / \` / `\/ I 200 `\ / \I / 1 \ � / \ I ` � \ / \ I / 1 \ ' / \ I ♦ � \ / \I / 1 \ / / \ I \ � \ / \ I / 1 \ ' / \ I ` � \ / \I / 1 \ / / \ I \ � \ / \I / 1 \ ' / \I ` � \ / \ I / 1 \ ' / \ I ♦ � \ / \I / 1 \ / / \ I \ � \ / \ I / 1 ♦ ' / \ I ` � \ / \I / 1 \ / / \ I \ � \ / \I / 1 \ 100 1100 LEGEND AB 9S WELL IN SHALLOW/SAPROLITE ZONE ASH PORE WATER FLOW LAYER WATER LEVEL ELEVATION NOTES: AB 9D WELL IN DEEP/TRANSITION ZONE SHALLOW FLOW ZONE 1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 8, AB 9BR 0 WELL IN COMPETENT BEDROCK ATER LEVERLEVE L ELEVATION GROUNDWATER 2019 FOR EACH WELL. NOTE ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE AB 4S WELL IN ASH PORE WATER SAME DAY. ASH BASIN WATER ELEVATION IS RECORDED FROM APRIL 8, 2019. DEEP/TRANSITION ZONE FLOW ZONE REFERENCED TO NORTH AMERICAN VERTICAL DATUM 1988. GENERALIZED WATER TABLE GROUNDWATER LEVEL ELEVATION 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENT THE GENERALIZED FRACTURE BEDROCK FRACTURE V BEDROCK FLOW ZONE GROUNDWATER ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE -SPECIFIC BOREHOLES. AS ORIENTATION LEVEL ELEVATION CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE GENERALIZED GROUNDWATER WATER LEVEL ELEVATION (NAVD 88) ANY DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE FLOW DIRECTION ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS GENERALIZED ASH PORE (LABEL COLORING BY FLOW ZONE) TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES WATER FLOW DIRECTION VERSUS DEPTH ARE CONCEPTUAL ONLY. WELL SCREEN GENERALIZED VERTICAL HYDRAULIC GRADIENT 0 ASH - — - COMPLIANCE BOUNDARY 0 ASH PORE WATER FILL DUKE 0 125 250 500 HORIZONTAL SCALE: 1" = 500' 0 SAPROLITE 4' ENERGY VERTICAL SCALE: 1 " = 200' FIGURE 6-2 5X VERTICAL EXAGGERATION GENERAL CROSS SECTION A ® WEATHERED ROCK CAROLINAS ASH BASIN DRAWN BY: C. BRUCE DATE:08/01/2019 CORRECTIVE ACTION PLAN UPI ;• % _"; : BEDROCK REVISED BY: C. BRUCET DATE: 11/15/2019 RCI MA/C !`DCCI! CTCAIIA CTAT CROSS SECTION LOCATION 900 800 700 co Q600 Z Z _O 500 H Lu J 400 W 300 200 100 ACCELERATED REMEDIATION EXTRACTION SYSTEM BELEWS CREEK ASH BASIN DAM g -a -- B, (WEST) (EAST) COMPLIANCE BOUNDARY PARCEL IQ I� n�1 e e COMPLIANCE BOUNDARY I I to / I i \li V.\/i ml l BEDRIblCK✓/- /I/\ -'y/�i/\/I/\/ice /I/\/il\/I/\li� /I/\/ /�/I�\/�/I/\/ \ _\li� /I/\/ /I/ lip /I/�il\/I/\li�fil'/\/mil`/I/\li� /I/\/il�/Its►-ice /I/\/il\/I/\li� /1/\/il�/I/ i� ./\/�/\I/1`/-�\I�/\��/\I/1`/-\\I�/\��/\I\/ \iI�/\/_/\I�/\/- �4�./ /\I\/\ _♦ I•��'-/\I\/\//'_\�I�/\,-/\I\/\/-\'I�/\�-/\I\/\/-`��/♦/-/\I\/\/-\'I�/\�-/\�/\/-\'I�/\�-/\I //I `\ �`� /I / `\ i`�/j `\_ ♦ 'BEDROCK`L i`\/i / \\ /I / \\ �Ti ��iK\\ \.//I / `L i`\/j \\ ♦ �� /I / `\ i`�//I `\ ♦ �`� /I - \7 T�/j / `\�� /u� i`\//I `\ i`\. /T/\I/1`/\/\I/ GENERALIZED GDIIRE�IONTOTWATER HE w /1,/\ NORTHj/\/� / / / _ / -`/-\.-\-1_/`/-\\l/`.-\-\_/`/-\�1j/-_\-1�/\-\-11/--\-1�--\�1'/\--\-\/--\-1'/�-_\-1\�-\-1�/�-_\-1'/�- \-1'/�-_\-\�/\ l_ i� / I/.. l / = l / l l / l 1, l / l . . LEGEND AB 9S WELL IN S HALLOW/SAPRO LITE ZONE V ASH PORE WATER FLOW LAYER WATER LEVEL ELEVATION NOTES: AB-9D WELL IN DEEP/TRANSITION ZONE AB-9BR 0 WELL IN COMPETENT BEDROCK SHALLOW/SAPROLITE FLOW ZONE 1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 8, GROUNDWATER LEVEL ELEVATION 2019 FOR EACH WELL. NOTE ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE AB 4S WELL IN ASH PORE WATER SAME DAY. ASH BASIN POND ELEVATION IS RECORDED FROM APRIL 8, 2019. V DEEP/TRANSITION ZONE FLOW ZONE REFERENCED TO NORTH AMERICAN VERTICAL DATUM 1988. GENERALIZED WATER TABLE GROUNDWATER LEVEL ELEVATION BEDROCK FRACTURE BEDROCK FLOW ZONE GROUNDWATER 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENT THE GENERALIZED FRACTURE ORIENTATION LEVEL ELEVATION ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE -SPECIFIC BOREHOLES. AS GENERALIZED VERTICAL CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE �� HYDRAULIC GRADIENT A WATER LEVEL ELEVATION (NAND 88) ANY DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE (LABEL COLORING FLOW ZONE) ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS 0 ASH TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY. 0 ASH PORE WATER WELL SCREEN FILL 0 SAPROLITE 'DUKE 0 125500 TAL SCALE: HORIZONTAL ALE: 1" = 500' ® WEATHERED ROCK VERTICAL SCALE: 1"=200' 5X VERTICAL EXAGGERATION FIGURE 6-34ENERGY BEDROCK (`AC?(ll INIA¢ GENERAL CROSS SECTION B-1 AQW RAQIAI — — — COMPLIANCE BOUNDARY 900 800 700 co co 600 � Q Z Z 5000 Lu 400 J W 300 200 100 CROSS SECTION LOCATION . ` a ♦," 4 zr ( PRE -DECANTING %//� _ //i— \�� -- �■j limp POST CLOSURE - \\ ` r( - �. I Lw CONDITIONS FORIr 4 ` - ,T./,■ CONDITIONS ■ ,� ■ m —� / 1�'r CLOSURE -IN -PLACE I I -�� s I 116 / it Jill( I 4L - , �� nti ,. �o`o . m��`� = �/� I 1 � ```` / /� / � � '' r{-® y,�,�sl•Fg4kFpo � moo` � 4�_ xv ar:. s� t I -•. �• • , e'er'41 . ♦ •'. . .� "-+ i* 9,", 1 • ■ 9 . e s r , � , � ..�" _ � -90 FEET I--" -_ I -90 FEET � ,- '+ 't •� - < - . I f --I 10FEET f 10FEET - o w ■ � � 1r i ■ o w ■ LEGEND NOTES: —� —APPROXIMATE SATURATED ASH THICKNESS ISOPACH LINED RETENTION BASIN 1. ASH THICKNESS ISOPACH SURFACES FROM FLOW AND TRANSPORT MODELS (FALTAAND OTHERS, COAL PILE BOUNDARY DUKE � ENERGY. . GRAPHIC SCALE 500 0 500 1,000 FIGURE 6-4 SATURATED ASH THICKNESS MAP ASH BASIN WASTE BOUNDARY 2. SATURATED ASH THICKNESS FOR CLOSURE -IN -PLACE IS BASED ON CLOSURE MODEL RESULTS — - — - -ASH BASIN COMPLIANCE BOUNDARY WITH UNDERDRAINS. PROPOSED HYBRID LANDFILL WASTE EXTENT CAROIINAS (IN FEET) FOR PRE -DECANTING AND POST -CLOSURE CONDITIONS DRAWN BY: C. WYATT DATE: 06/07/2019 REVISED BY: A. ROBINSON DATE: 12/04/2019 LANDFILL BOUNDARY 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. STRUCTURAL FILL BOUNDARY 4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO FEBRUARY 2019. LANDFILL COMPLIANCE BOUNDARY J� CHECKED BY: A. ALBERT DATE: 12/04/2019 APPROVED BY: C. EADY DATE: 12/04/2019 PROJECT MANAGER: A. ALBERT CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION .. DUKE ENERGY CAROLINAS PROPERTY LINE 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). synTerlQ www.synterracorp.com O Sample ID (Depth) { O `� IDDLETON BG-01D(1-21 2 . LOOP BG-01D(11-1) "O r . r Molybdenum % Sample ID (Depth) r` MW-200BR(0-1.5) ♦ +� { BG-01D (31-31) Arsenic `� ♦! _ Sample ID(Depth) { sample ID (Depth) ' r ma e: + — BGSB-01 (1-2) I Sample 0 (Depth) ■ GwA-o15 (zo-z1.$) " r ► r — - A r - Arsenic ! f BGSB-02 (1-2) Arsenic ,■ BGSB-02 (10-12) BGSB-01 (5-7) 1 BGSB-02 (15-17) [� Ej k BGSB-01 (10-12) ■ .� a - '}f'";t',u'; = ■ BGSB-02 (20-22) - BGSB-01 (15-17) ■ - ! I ■ BGSB-02 (30-32) ♦ BGSB-01 (20-22) SamplelD(Depth) ;r 1 BGSB-02 (30-32) AB-01S(20-21.5) ® • Sam pie lD(Depth) ' ■ � Arsenic.. a .. AB-03D (40-41.5) �I i ■ ;I # ■,♦ 1`f r #jr Sam ple lD (De pth) ■ Sample lD (De pth) ■ ,c /♦ O GWA-03D (34-35.5) ■ GWA-100 (2-3) / Arsenic a I< ♦ 1 �I 7 " I a Sample ID (Depth) MW-203BR (20-21.5) pH 6 Sample ID(Depth) GWA-09GTB (40-41.5) Chromum / ��r Oki ■ ■ . Sam ple lD (Depth) GWA-08D (20-21.5)• : + +r+ J +r Sample ID (Depth) Sample ID (Depth) ■ GWASB-12 (5-7) GWA-12D (10-12) ■ - PH GWA-12D(15-17) Sample ID (Depth) I Sam ple lD(D2 pth) GWASB-12(10-12) W GWA-12D(20-22) BC-035 (1-2) ■ J BGSB-03 (1-2) GWASB-12 (15-17) GWA-12D (25-27) BG-03S (10-12) a� BGSB-03 (5-7) GWASB-12 (20-22) BG-03S (20-22) BGSB-03 (10-12) Selenium ■ BGSB-03 (15-17) GWASB-12 (25-27) )_ ■ BGSB-03 (20-22) Selenium Sample ID(Depth) r MW-202BR (40-42) !a �� MW-202BR(47-49) MW-202BR(60-61.5) ■ DUKE ENERGY® CAROLINAS 41 synTerra BELEWS CREEK STEAM STATION s,- GRAPHIC SCALE 490 0 490 980 (IN FEET) DRAWN BY: C. WYATT DATE: 08/05/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 PROJECT MANAGER: A. ALBERT m BELEWS RESERVOIR LEGEND BACKGROUND SOIL SAMPLE LOCATION WITH 0 NO EXCEEDANCES LOCATION WITH NO EXCEEDANCES BACKGROUND LOCAITON WITH ONE OR MORE EXCEEDANCES OF REGULATORY CRITERIA O LOCATION WITH ONE OR MORE EXCEEDANCE OF REGULATORY CRITERIA ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY •--- LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA - - DUKE ENERGY CAROLINAS PROPERTY LINE 3 STREAM (AMEC NRTR) 71-1 WETLAND (AMEC NRTR) NOTES: 1.THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 2. ALL BOUNDARIES ARE APPROXIMATE �];Zi]�q:�� Zi11J�1■l_1:��,:Zi1�11■]�H:17■1111��I�:iH'L9_Vii]RI�G6'.' 4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). FIGURE 6-5 UNSATURATED SOIL SAMPLE LOCATIONS AND EXCEEDANCES CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 900 800 700 a 00 0 600 a z Z 500 O H a W 400 J W 300 200 100 A ---a (SOUTH) f STRUCTURAL FILL COMPLIANCE BOUNDARY NOTES: 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN LEGEND CALCUALTED BASED ON CENTRAL TENDANCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO APRIL 2019. AB 9S WELL IN S HALLOW/SAPRO LITE ZONE ASH PORE WATER FLOW LAYER 2. /L, Boron (B) AND LITHIUM (U) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pgWATER AB 9D WELL IN DEEP/TRANSITION ZONE LEVEL ELEVATION 3. Chloride (Cl) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L) AB 9BR WELL IN COMPETENT BEDROCK SHALLOW/SAPROLITE FLOW ZONE 4. NO MEAN ANALYSIS FOR BEDROCK WELLS (AB-2BRD AND AB-36RD) FOR GROUNDWATER LEVEL ELEVATION CONSTITUENTS; CHLORIDE, LITHIUM AND TOTAL DISSOLVED SOLIDS AB 4S WELL IN ASH PORE WATER 5. SFMW-2D IS PART OF THE SOLID WASTE STRUCTURAL FILL MONITORING DEEP/TRANSITION ZONE FLOW ZONE NETWORK. THIS UNIT IS NOT CONTIGUOUS WITH THE ASH BASIN HYDRAULIC GENERALIZED WATER TABLE GROUNDWATER LEVEL ELEVATION SYSTEM AND IS PART OF SEPARATE ONGOING SITES ASSESSMENT. — _ BEDROCK FRACTURE BEDROCK FLOW ZONE GROUNDWATER - NO DATA AVAILABLE ANALYTICAL PARAMETER B CI u TDS ORIENTATION LEVEL ELEVATION REPORTING UNITS Ng/L mg/L Ng/L mg/L GENERALIZED GROUNDWATER FLOW DIRECTION Aegisw 50 MEAN BORON (B) CONCENTRATION (�ag/L) 15A NCAC 02L STANDARD 700 250 NE Soo GENERALIZED ASH PORE 1.1 MEAN CHLORIDE (CI) CONCENTRATION (mg/L) BACKGROUND THRESHOLD VALUE 50 19 2 93 _► WATER FLOW DIRECTION is 6.6 LITHIUM (Li) CONCENTRATION (Ng/L) (SHALLOW FLOW ZONE)r BACKGROUND THRESHOLD VALUE MEAN TOTAL DISSOLVED SOLIDS (TDS) 50 19 95 134 (DEEP FLOW ZONE), ASH CONCENTRATION (mg/L) BACKGROUND THRESHOLD VALUE SO 3 30 181 (BEDROCK FLOW ZONE)1 0 ASH PORE WATER 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM WELL SCREEN BACKGROUND GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DECEMBER 2018 FILL AS SUBMITTED IN TUNE 2019. COMPLIANCE BOUNDARY 0 SAPROLITE WEATHERED ROCK DUKE tn 0 125 250 500 HORIZONTAL SCALE: 1" = 500' GEC ® VERTICAL SCALE: 1" = BEDROCK ENERGY TI SX VERTICAL EXAGGERATION ASH B nnCA AI Plc M^I — A' (NORTH) DAN RIVER 900 800 700 a 00 600 a z 500 Z O I — a 400 W J W 300 200 100 CROSS SECTION LOCATION 900 800 700 co 00 600 Q Z Z 500 _O H Q W 400 J W 300 200 A --a (SOUTH) f STRUCTURAL FILL COMPLIANCE BOUNDARY j � OD 00 p v wD a A' (NORTH) DAN RIVER 900 800 700 ao 600 0 Q Z 500 Z _O H Q 400 W J W 300 200 100 NOTES: 100 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN CALCUALTED BASED ON CENTRAL TENDANCY OF DATASET USING DATA RANGING LEGEND FROM JANUARY 2018 TO APRIL 2019. 2. ALL CONCENTRATIONS ARE IN MICROGRAMS PER LITER (yg/L) AB 9S WELL IN S HALLOW/SAPRO LITE ZONE ASH PORE WATER FLOW LAYER 3. NO MEAN ANALYSIS FOR WELLS AB-2BRD AND GWA-24S FOR CONSTITUENTS; ARSENIC (As), BERYLLIUM (Be), STRONTIUM (Sr) AND THALLIUM (TI) WATER LEVEL ELEVATION AB 9D WELL IN DEEP/TRANSITION ZONE 4. SFMW-2D IS PART OF THE SOLID WASTE STRUCTURAL FILL MONITORING SHALLOW/SAPRO LITE FLOW ZONE NETWORK. THIS UNIT IS NOT CONTIGUOUS WITH THE ASH BASIN HYDRAULIC AB-9BR WELL IN COMPETENT BEDROCK GROUNDWATER LEVEL ELEVATION SYSTEM AND IS PART OF SEPARATE ONGOING SITES ASSESSMENT. AB-4S WELL IN ASH PORE WATER -NO DATA AVAILABLE Q DEEP/TRANSITION ZONE FLOW ZONE ANALYTICAL PARAMETER As Be Sr TI GENERALIZED WATER TABLE GROUNDWATER LEVEL ELEVATION BEDROCK FRACTURE REPORTING UNITS ug/L Ug/L ug/L Ng/L ORIENTATION BEDROCK FLOW ZONE GROUNDWATER 15ANCAC 02LSTANDARD 10 4* NE 0.2- LEVEL ELEVATION GENERALIZED GROUNDWATER BACKGROUND THRESHOLD VALUE 1 0.3 46 0.2 ASH BASIN FLOW DIRECTION A64— MEAN ARSENIC (AS) CONCENTRATION (Ng/L) (SHALLOW FLOW ZONE)' BACKGROUND THRESHOLD VALUE GENERALIZED ASH PORE as MEAN BERYLLIUM (Be) CONCENTRATION (�Ig/L) (DEEP FLOW ZONE)' 1 0.1 73 0.2 WATER FLOW DIRECTION ee m.l MEAN STRONTIUM CONCENTRATION gACKGROUND THRESHOLD VALUE z o.z 99 0.1 (Sr) (pg/L) (BEDROCK FLOW ZONE)' oPo e ASH m. MEAN THALLIUM (TI) CONCENTRATION (ug/L) * -INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACS) OF THE 15A NCAC �P O = ASH PORE WATER 02L STANDARD APPENDIX 1, APRIL 1, 2013. e` WELL SCREEN 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM FILL BACKGROUND GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DECEMBER 2018 Q AS SUBMITTED IN JUNE 2019. 00 SAPROLITE �02 _ _ _ COMPLIANCE BOUNDARY DUKE 0 125 250 500 FIGURE 6-6b o ® PINE HALL ROAD ASH LANDFILL WEATHERED ROCK BEDROCK ' % 4 ENERGY HORIZONTAL SCALE 1"=500' VERTICAL SCALE: 1" = 200' 5XVERTICAL EXAGGERATION GENERAL CROSS SECTION A -A' ASH BASIN -NON-CONSERVATIVE GROUP CROSS SECTION LOCATION 900 800 700 00 600 Q Z Z 500 _O H Q W 400 J W 300 200 100 A --a (SOUTH) f STRUCTURAL FILL COMPLIANCE BOUNDARY N (gDo0 J ao aD rc a Q LEGEND AB 9S WELL IN SHALLOW/SAPROLITE ZONE AB 9D WELL IN DEEP/TRANSITION ZONE AB 9BR WELL IN COMPETENT BEDROCK AB 4S WELL IN ASH PORE WATER V GENERALIZED WATER TABLE BEDROCK FRACTURE ORIENTATION GENERALIZED GROUNDWATER FLOW DIRECTION NNW-*- GENERALIZED ASH PORE WATER FLOW DIRECTION 0 ASH 0 ASH PORE WATER FILL 0 SAPROLITE ® WEATHERED ROCK BEDROCK NOTES: 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN CALCUALTED BASED ON CENTRAL TENDANCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO APRIL 2019. 2. ALL CONCENTRATIONS ARE IN MICROGRAMS PER LITER (mg/L) ASH PORE WATER FLOW LAYER 3. NO MEAN ANALYSIS FOR BEDROCK WELLS AB-2BRD AND GWA-24S FOR WATER LEVEL ELEVATION CONSTITUENTS; COBALT (CD), IRON (Fe) AND MAMGAMESE (Mn) 4. SFMW-2D IS PART OF THE SOLID WASTE STRUCTURAL FILL MONITORING SHALLOW SAPROLITE FLOW ZONE NETWORK. THIS UNIT IS NOT CONTIGUOUS WITH THE ASH BASIN HYDRAULIC GROUNDWATER LEVEL ELEVATION SYSTEM AND IS PART OF A SEPARATE ONGOING SITES ASSESSMENT. -NO DATA AVAILABLE DEEP/TRANSITION ZONE FLOW ZONE ANALYTICAL PARAMETER Co Fe Mn GROUNDWATER LEVEL ELEVATION REPORTING UNITS ug/L ug/L Ug/L BEDROCK FLOW ZONE GROUNDWATER 15ANCAC 02LSTANDARD 1* 300 so LEVEL ELEVATION BACKGROUND THRESHOLD VALUE (SHALLOW FLOW ZONE)i 0.6 1600 40 A848RD MEAN COBALT (Co) CONCENTRATION (pg/L) BACKGROUND THRESHOLD VALUE 2 226 57 IRON Fe CONCENTRATION L ( ) (I-I� ) DEEPMEAN (THRESHOL ZALUE F. BACKGROUND THRESHOLD VALUE 0.8 341 64 �D MEAN MANGANESE (Mn) CONCENTRATION (ug/L) (BEDROCK FLOW ZONE)i * - INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACS) OFTHE 15A NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013. 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM 0 WELL SCREEN BACKGROUND GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019. COMPLIANCE 0 125 250 500 BOUNDARY ,�� DUKE HORIZONTAL SCALE: 1" = 500' - A' (NORTH) DAN RIVER — 900 800 700 a co 600 0 Q Z 500 Z O H Q 400 W J W 300 200 100 CROSS SECTION LOCATION AB-4 LOWER ASH GWA-20D 2/1/2019 4/1/2019 6/1/2019 8/1/2019 10/1/2019 2/1/2019 4/1/2019 6/1/2019 8/1/2019 10/1/2019 11 8 n 10 ? 7 9 Vf 6 C8 L c. 5 , 1-�� ♦ 7 4 I No new data collected Stable trend observed 6 due to ash basin access 3 restrictions. Stable trends observed -400 n� - -ti' --- ^ -` r - _ _ 600 450 rr/ Drift continued after �r /�, 400 E .O 500 IL r.," ORP data drift recalibration J� I 200 CL observed, / 550 O rendering data unreliable. 0 G Trend line included for ORP sensor information purposes only. replaced -600 -200 0 0 Total change in water ++ Total change in water 5 4-J level from decanting is 5 756 level from decanting is ^ > 748 -7.9 feet between = p approximately -1.2 feet 4 = W Go decantingdecanting start date 4 "•' 00 755 between decanting start `� W co 744 and November 1, 2019 3 G date and July 28, 2019 3 �p y 740 f0 'V Q 754 2 = > Q 2 = Z Z 736 _ I a� 753 1 d J 1 OC a+ �+ 732 i ' M 0 3 752 0 02/01/19 04/01/19 06/01/19 08/01/19 10/01/19 02/01/19 04/01/19 06/01/19 08/01/19 10/01/19 Date Date AB-4 LOWER ASH: Ash pore water well located central to the GWA-20D: Deep flow zone well located downgradient and ash basin delta. See Figure 6-9 for monitoring location. northwest of the ash basin. See Figure 6-9 for monitoring location. AB-4 SAP AB-2D 2/1/2019 4/1/2019 6/1/2019 8/1/2019 10/1/2019 02/01/19 04/01/19 06/01/19 08/01/19 10/01/19 8 8 M 7 = 7 6 .�. 6 �. 5 �. 5 4 4 I Stable trends observed 3 Stable trends observed 3 No new data collected due to ash basin access restrictions. "7450 > 250 I 200 � 375 150 300 � � C 100 O 225 50 150 Increasing trend observed prior Total change in specific to decanting conductivity is approximately commencement 184 uS/cm since decanting �= := 1600 commenced ++ 216 ++ ^ 1550 E 210 Total change in specific c conductivity is 1500 0 204 0 approximately 18 decanting 0" 0 UV) uS/cm since V 1450 198 commenced L- 1400 a 192 0. V) U) 1350 c Total change in water r- Total change in water level from decanting is 5 0 level from decanting is 5 756 approximately -2.1 4-1 732 approximately -11.2 feet = 4 ^ feet between 4 — > ^ between decanting start — w00 755 decanting start date 3 _ -2 00 728 date and November 1, 3 V 754 and July 28, 2019 jp 724 2019^ M >> 2 = >> 2 iV 753 1 J V 720 I 1 I J OG ( I Ilk,I it M 716 0 752 0 3 02/01/19 04/01/19 06/01/19 08/01/19 10/01/19 3 02/01/19 04/01/19 06/01/19 08/01/19 10/01/19 Date Date AB-4SAP: Shallow flow zone monitoring well located within the AB-2D: Deep flow zone well located downgradient of the ash footprint of the ash basin, below ash pore water well A13-4 basin, below the ash basin dam. See Figure 6-9 for monitoring LOWER ASH. See Figure 6-9 for monitoring location. location. LEGEND Notes: Specific conductivity is monitored at (S.U.) AB-4SAP and AB-2D only. t��ENERGY DUKE DRAWN BY:D. AVARD DATE: 11/20/2019 � FIGURE 6-7 Oxidation Oxidation Reduction Potential (ORP)(mV) NAVD 88 - North American Vertical Cn^' REVISED BY:M. ROZIER DATE: 12/03/2019 GEOCHEMICAL WATER QUALITY - - ORP data included for information purposes Datum PLOTS Specific Conductivity ([6/cm) in -inches CHECKED BY:A. ALBERT DATE:12/03/201 CORRECTIVE ACTION PLAN UPDATE Decanting Start (03/27/2019) pS/cm - micro Siemens per centimeter APPROVED BY:A. ALBERT DATE:12/03/2019 BELEWS CREEK STEAM STATION Decanting Suspended (07/29/2019) my -millivolts PROJECT MANAGER:A. ALBERT BELEWS CREEK NC Daily Total Rainfall (inches) SU - standard unit Tff OCalibrated Field Parameter Measurements (pH and specific conductivity) m www.synterracorp.com Deep Groundwater Legend • AB-04S ■ GWA-01D ♦ MW-200D ♦ AB-04LOWERASH0 GWA-03D • MW-201D ■ AB-5S A GWA-11D Z MW-204D a A AB-5SL V GWA-16DA * BG-11D 'O o Z AB-6S ♦ GWA-17D ■ BG-2D — * AB-6SL Z GWA-19D • BG-3D / V AB-7S * GWA-20D ♦ MW-202D ao O AB-8S ❑ GWA-21D X AB-8SL O GWA-22D V GWA-24D g 0 GWA-27D O*ge O GWA-30D X GWA-31 D 3 �7 GWA-32D Shallow o� Groundwater 80°/ ti Affected — 0 G 60 x Potential Mixing Generally 7 Unaffected • g�I 60% 80% 2 CEO 8( * - ", ¢O - • a� �00 g � El � ♦ � cAo Z I g cl 61. Q5 �—�Ca — CI —10 Shallow Groundwater Legend • AB-04S ♦ GWA-01S X GWA-30S ♦ AB-04LOWERASH ■ GWA-03S ❑ GWA-31S ■ AB-5S A AB-5SL • GWA-16S • MW-200S Z AB-6S GWA-17S ■ MW-204S * AB-6SL Z GWA-20SA ♦ BG-2S V AB-7S * GWA-22S * MW-202S O AB-8S O GWA-27S X AB-8SL Deep Groundwater •' DUKE ENERGY c, DRAWN BY: R. BADUM REVISED BY: R. BADUM CHECKED BY: A.ALBERT APPROVED BY: A. ALBERT PROJECT MANAGER: A.ALBERT 0 4—Ca — DATE: 08/23/2019 Syf 1Terlcl www.synterracorp.com Bedrock Groundwater Legend • AB-04S ■ GWA-01BR ♦ AB-04LOWERASH • GWA-16BR ■ AB-5S ♦ GWA-19BR AB-5SL A GWA-20BR Z AB-6S v GWA-24BR * AB-6SL Z MW-200BR V AB-7S * MW-201 BR O AB-8S • BG-2BRA X AB-8SL * MW-202BR Bedrock Groundwater 0 / `01 0— x O" O 00 io 00 L Anoi — CI FIGURE 6-8 ASH PORE WATER AND GROUNDWATER PIPER DIAGRAMS CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA GWA-21 S/D GWA-11 S/D EX-OB1 1 � GWA-20SA GWA-27D I ;oa Jfo I INSET A SCALE: 1- = 500' AB-4,1 ,.. = LOWE 3HR FINGER_Mll r -r0` -NLoop ` :1 + CCR-6D , 1 , ify Y .. CCR-11S/D40 Loa _ y �� STFgMp r► y x9PINE HALL oQ +ROADLANDFILL (CLOSED) ��♦ o° I D~� •�-r�r p\NE� r r f I '5- Se u!F "a r�' Vic... •r :a - ,��,-.,� !" �•�` �_� ►DUKE ENERGY. CAROLINAS •` � r synTerra O PO 10'1Q GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/25/2019 REVISED BY: C. WYATT DATE: 12/04/2019 CHECKED BY: A. ALBERT DATE: 12/04/2019 APPROVED BY: C. EADY DATE: 12/04/2019 PROJECT MANAGER: A. ALBERT m 0 LEGEND PROPOSED TRANSDUCER LOCATION FOR ASH • BASIN FINGER PONDED WATER LEVEL MONITORING TRANSDUCER LOCATION FOR ASH BASIN O GROUNDWATER LEVEL MONITORING ■ GEOCHEMICAL SONDE LOCATION FOR ASH BASIN GROUNDWATER LEVELAND WATER QUALITY MONITORING ASH BASIN WASTE BOUNDARY - — - ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA - DUKE ENERGY CAROLINAS PROPERTY LINE 3111, STREAM (AMEC NRTR) WETLAND (AMEC NRTR) NOTES: 1. PHR - PINE HALL ROAD 2. WCP - WEST OF CHEMICAL POND 3. NCP - NORTH OF CHEMICAL POND 4. LRB - LINED RETENTION BASIN 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 6. ALL BOUNDARIES ARE APPROXIMATE. 7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 8. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83). FIGURE 6-9 SITE LAYOUT DECANTING MONITORING NETWORK CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA Ash Basin Pond 5 Ash Basin Fingers Monitoring 5 MW-2-7 750 Total change in water level 760 Average total change in level from No new data collected from Total change in water level 5 from decanting is approxlmately -13 feet ter decanting is Lined Retention Basin Ponds Water due to ash 766 from decanting Is tel 3. approxima y - 3 feet pp w 748 between decantingtart s date and July 28, 2019 4 pp W 758 approximately -3.0 feet between decanting start date basin access restrictions. 4 co 00 between decanting start date and November 1, 2019 4 and November 1, 2019 Z 746 Z ; Z 765 0744 3 V o 756 3° v 742 W 10 C > W i0 C 'iii v 764 W 10 e y q 2 Cc y 754 2 CC y 29 y 740 y m J J J 763 0 738 3 1 0 3 752 1 N m 3 1 736 I I J, 762 11 I III I I �I IIAL734 0 i 750 0 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date Date Date — Lined Retention Basin Ponded Water Elevation (NAVD 88) — Ash Basin Pond Level Elevation (NAVD 88) — North of Chemical Pond Ponded Water Elevation (NAVD 88) — MW-2-7 Water Elevation (NAVD 88) — West of Chemical Pond Ponded Water Elevation (NAVD 88) — Pine Hall Road Ponded Water Elevation (NAVD 88) AB-9 Cluster GWA-9 Cluster CCR-11 Cluster 5 Average total change in 9 level from decanting 5 756 5 Water level has dropped 762 water is appro ma[ely -4.8 feet 754 below 5 transducer, wall is between decanting start 2753 s 2 nearly dry date and November 1, 2019 4 W Average total change In water level 4 Go 4 > 760 0 750 > from decanting is approximately -3.1 feet between decanting start date > 752 ZZ 747 and November 1, 2019 Z Average total change In water level from decanting C758 c C 3 :. C 0 744 3C ;,, 2 750 is approximately -4.5 feet between decanting stare C i8 j A j date and November 1, 2019 i6 j N 756 C ly to — 717 10 2� W 748 rg 2X i v 2 > y 714 i y J 754 J J y - 711 d 746 m 3 o 708 3 1 m 3 1 752 1 7os 1744 750 702 ILA 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 0 01/01/19 03/01/19 05/01/19 Date 07/01/19 09/01/19 11/01/19 Date Date AB-9S Water Elevation (NAVD 88) — GWA-9S Water Elevation (NAVD 88) — CCR-11 S Water Elevation (NAVD 88) AB-9D Water Elevation (NAVD 88) — GWA-9D Water Elevation (NAVD 88) — CCR-11 D Water Elevation (NAVD 88) — AB-9BR Water Elevation (NAVD 88) GWA-9BR Water Elevation (NAVD 88) LEGEND C('DUKE DRAWN BY: D.AVARD DATE:11/10/2019 FIGURE 6-10a Notes: — Ash Pore Water ! ENERGY. REVISED BY: M.ROZIER DATE:12/03/2019 HYDROGRAPHS — ASH BASIN AND SOUTH f — Decanting Start (03/2712019) NAVD 88 - North — Flow l Zone CAROLINAS CHECKED BY: A.ALBERT DATE:12/03/2019 EAST, AND WEST OF ASH BASIN DeepShallow — Decanting Suspended (07/29I2019) Dee Flow Groundwater Zone American Vertical Groundwater Z APPROVED BY: A.ALBERT DATE:12/03/2019 CORRECTIVE ACTION PLAN UPDATE Daily Total Rainfall (inches) — Bedrock Flow Groundwater Zone Datum1988 in - inches PROJECT MANAGER: A.ALBERT BELEWS CREEK STEAM STATION synTerra BELEWS CREEK, NC www.synterracorp.com A13-4 Cluster 756 00 W C Q E 755 0 N W 754 7 N N .753 3 752 p 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date Date Date — A13-4 Lower Ash Water Elevation (NAVD 88) — AB-1 BR Water Elevation (NAVD 88) — AB-2D Water Elevation (NAVD 88) AB-4 SAP Water Elevation (NAVD 88) AB-3 D AB-1BR 5 732 00 4 Go G 730 > Q Z c 728 3V o 1p v 726 C '� W 2 > 724 J m 722 1 3 720 AB-2D 5 723 00 00 0720 Q z 0 717 w lu 714 v J ,711 m 3 708 Average total change in High variability in water a ter level from elevation is a result of decanting is the ]AP extraction approximately -1.7 feet system pump cycling between tlecantmg start date and July 28, 2019. Restrictetl ash basin cc a ss has constrained transducer data downloads. Reduction in water elevation is a result of temporary natural siphoning effect from IAP extraction well EX-1. No new data collected due to ash b,,in access -bons. 5 732 co 4 W ,729 Z 3 ° 726 A > C N 2 Cc 723 J 0 720 1 3 717 0 5 645 W 4 a0 > 644 z_ c 3 C o 0 > 643 `c •� lu 2 cd w v J v 642 1 3 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date — AB-31D Water Elevation (NAVD 88) CCR-6D Total change In water level from decanting is approximately -9.6 - feet between decanting start date andNovember 1, 2019 4 3V m e 29 1 641 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date Date — CCR-613 Water Elevation (NAVD 88) — EX013-1 Water Elevation (NAVD 88) Total change in water level from decanting is approximately -0.84 feet between decanting start date and November 1, 2019 EXOB-1 5 744 5 W 741 4 0D O i 738 3Vc 0 m 735 c v •� W 2 m 732 J N 1 3 729 726 0 Total change in water level from decanting is approximately -11.4 feet between decanting start data and November 1, 2019 LEGEND ('DUKE DRAWN BY: D.AVARD DATE:11/10/2019 FIGURE 6-10b — Ash Pore Water Notes: ENERGY. REVISED BY: M.ROZIER DATE:12/03/2019 HYDROGRAPHS — WITHIN ASH BASIN AND — Decanting Start (03/2712019) — Shallow Flow Groundwater Zone NAVD 88 — CAROLINAS NORTH OF ASH BASIN — Decanting Suspended (07/29/2019) — Deep Flow Groundwater Zone North American CHECKED BY: A. ALBERT DATE:12/03/2019 Daily Total Rainfall (inches) Bedrock Flow Groundwater Zone Vertical Datum /� APPROVEDBY: A. ALBERT DATE: 12/03/2019 CORRECTIVE ACTION PLAN UPDATE �r BELEWS CREEK STEAM STATION in - i n -nches SynTerra PROJECT MANAGER: A. ALBERT BELEWS CREEK, NC www.synterracorp.com EX013-2 5 CCR-2 Cluster GWA-20 Cluster 750 5 750 5 747 Total change in water level from decanting is Average total change in water level from decanting is Water level has decreased below CCR-25 Average total change in _ approximately -11.3 feet between decanting start 74] approximately -6.2 feet between tlecan[ing start transducer elevation, well Is pearl d Y dry. W 747 ter level from decanting is -).9 feet between decanting start Go date and November 1, 4 G date and November 1, 2019 4 00 date and November 1, 4 744 2019 2019 Z 744 Z Z 744 0 741 3 V o 3V a 3V 741 0 0 0) 741 0),0r Water level has decreased W 738 —0 2 N W —y 2K W y 738 below GWA-209A transducer elevation, well is C 738 I > nearylry. J 735 J 0 0 0 735 3 1 3 735 1 0 1 732 I 732 IIII I�I 732 0J 0 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date Date Date — CCR-2S Water Elevation (NAVD 88) — GWA-20SA Water Elevation (NAVD 88) — EX013-2 Water Elevation (NAVD 88) — CCR-213 Water Elevation (NAVD 88) — GWA-20D Water Elevation (NAVD 88) GWA-11D 5 GWA-21D 724 5 GWA-27D 747 5 Total change in water level Total change in water Total change in water level ]32 00 from decanting is approximately -9'1 feet between decanting start 722 level from decanting is approximately -6.2 feet between decanting start %^ ]44 from decanting is approximately -10.2 feet between decanting start 00 date and November 1, 2019 Q W date and November 1, 2D 19 4 y date and November 1, 2019 4 11 C G Z 729 Z 720 i 741 4 3 C 4 3v 4 35 i 726 718 i 0 W C 0 C 0 4!738 C w Z 21 W 0716 Z 2� W 0 M J 723 `0 J 735 3 720 1 a m 714 3 1 01 m 3 732 1 All 712 1 J 1111AL4UL L, iii a 717 0 0 729 0 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 11/01/19 Date Date Date — GWA-11 D Water Elevation (NAVD 88) — GWA-21 D Water Elevation (NAVD 88) GWA-27D Water Elevation (NAVD 88) LEGEND ( DUKE DRAWN BY: D. AVARD DATE: 11/10/2019 Notes: � ENERGY. REVISED BY: M. ROZIER DATE: 12/03/2019 FIGURE 6-10c — Shallow Groundwater Flow Zone — Decanting Start (03/2712019) NAVD 88 CAROLINAs HYDROGRAPHS — NORTHWEST OF ASH BASIN — Dee Flo. — Decanting Suspended (07/29/2019) D North American CHECKED BY: A.ALBERT DATE:12/03/2019 CORRECTIVE ACTION PLAN UPDATE Dail Total Rainfall inches Vertical Datum Y (inches) APPROVED BY: A.ALBERT DATE:12/03/2019 BELEWS CREEK STEAM STATION 1988 in - inches S�/I�TQR,a PROJECT MANAGER: A.ALBERT BELEWS CREEK, NC www.syntermcorp.com imr I I;l0 610 630 Y ` Rg0 �_. 500 600 590—_., 6ti0 0 & o a. p >g� l el 4'. ry • 790 ao , � 760 'QO � \ �g0 74. �o �o s?o � 0 f 66°� ••�� gg0 ._„j�tToN LOOP 820 730 790 4�✓ T 11Oti0 7o LEGEND - ; 7800 75p 6O# 1 • • I 1 Ili j9�/ � STFgM,, 0 s40� • / �� 870 (� DUKE ENERGY CAROLINAS QNOTES: COAL PILE BELEWS GRAPHIC SCALE I 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 PROJECT MANAGER: A. ALBERT >40 740 FIGURE 6-11a ISOCONCENTRATION MAP ARSENIC IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA imr Vo I >g� 4'. •P\NENP�� no 11,0 - )2 710 ! O , / 690:1/ '�0 f 760 690 \\ 700 , L.�MIDp g10 110 810 7901170 0'YO I 110 v � �10 oo" 1g0 FpDwFIVSIgo TFgM O I 0 (\ �' • 790 740 ;'60 00 ?j0 I SO LEGEND o � � O MEMO J NOTES: I� BELEWS CREEK )40 �g O h� P '40 3 (DUKE 500 GRAPHIC SCALE500 1,000 ENERGY CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 YTem PROJECT MANAGER: A. ALBERT ��r, WWW_ CVIItprrAr,.nr 1_f:nm FIGURE 6-11b ISOCONCENTRATION MAP ARSENIC IN BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 750 730 A10 i '4p 720 360 'go 680 71 ell ON a 4'. 90 ,o 8 --__1 R�✓f��J111tl�1�� 720 790 lio0 701,gQ\\,,�1 \l.Pyypp �,t/i �.ry `. 7q0 L71Q 690 `♦ 780 .. I I ' . I I � Q�� . �jg 0 700 8A `R�\\ON LOOP 820 A 730 820 810 \ '� � 6 � I r �A60 — rvwl 4, r.i�" 60�• . • . . Ili 79 // � �STF•9iHa Q ,,. 840 g30 630 g'20 /• 821 850 g10 860 �g 0 O �r (� DUKE u ENERGY CAROLINAS 0 BELEWS RESERVOIR p800J �:` '40 740 . f/ 790 �• ,40 ao 0 I _ 74( GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 PROJECT MANAGER: A. ALBERT LEGEND FIGURE 6-12a ISOCONCENTRATION MAP BERYLLIUM IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 70 0590;f7rot �°� A 70a,g�,,�i \�Pyypp ��710 ° 0 \� L71Q / \ B 74 L 8Y0 �O , vr 111 _.. 690, (-MIDDIETON730 4 / too 9?0 �A11 I 7 1160 If.. 41 0 , 0 I 720 1AO ♦ > ' �. I LEGEND 6g0 •�/'P V 880 6j0 B60 �s6° l� ✓� Il4 \1 I 6 a 'g0 .:y 6110 STFg4? } NOTES:. (J800J �� ® �40 740 , I \Igo �/' �>> -- -�" 16 �8 o O O P ems.° �PVVR It DUKE DUKE ENERGY CAROLINAS J � Apo Apo i A0 740 GRAPHIC SCALE 50C 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-12b ISOCONCENTRATION MAP BERYLLIUM IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 620 I sq 610 �►-' 60 �aap ♦ 660 8 1,0 I ) /� \'\ ) \ ( ♦ � � B�� 1 , 20 690� � � 780 JB�\\i 870 / • �� so � �� (k) � I� o `s'O �6zo ss0 � �' �� ° � ��° � � op♦ >> �"/�J�� ` 690 61' 690 ♦ 80 - I • • I I I I _ a� ♦ ,o MW 200S GWA-30S GWA-1� szo �So ei0� I S 62 o 0 610 � CCR-13S GWA-32S � <50 <50 -� 786♦f�",—BG-1S � It CCR6S CCR7S '�`°►��i'�♦ 36 GWA-2S / o GWA-11$ CCR-4S NA 84 J oti . WA-21S 1338 793 MW-103S <50 7908jo I1 364 i GWA-31S � �, AB -2S CCR-5S B-3S a <50 jGWA-27S GWA-20S 10630 51 10510 533 AB-1S GWA-20SA , 11176 10240 G GWA-19SV CCR-2S WA- 19SA 710 2225 I 7To 6266 GWA-10S GWA-18, GWA-111SA 327 693 ( i CCR-28 28 r� GWA 17S 7so t � - - —155 �3o MW-204S IIO�<50 GWA-16S <50 �s8 � wir o � � � 00✓" M 790 18� O 1°O�Oy $ MW-203S <50 g0 610 = GWA-9S t l U <58 OB-5 aso <50 840 /� I 9793 o — CCR-9S GWA-22S 289 <50 t.CCR-11S C IPERCHED WATER CONDITIONS OBSERVED IN HE FIELD SUPPORT THAT THIS LOCATION IS DISCONNECTED FROM SHALLOW FLOW ZONE i 900 MW-4 746 o, 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR BORON IS 700 ug/L. 3. THE BACKGROUND VALUE FOR BORON IS 50 ug/L (AS SUBMITTED JUNE 2019). 4. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS MODIFIED FROM MODEL LAYER 13 (FALTAAND OTHERS, 2019) 5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017) AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA AND OTHERS, 2019). 6. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL R INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROL NA SPATIAL DATA SITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 8. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 9. ALL BOUNDARIES ARE APPROXIMATE 10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS 11. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). MW 5 ° <50 • I I• I I I I W; I Sao 3W07 so M O-3 (030 0 8�0 1 .<Q ♦ 1 I ♦ 820` .' 210 Z 9°p a� m GWA-26S ♦ 'ENP <50 g0 MW-6 . •PN GWA23S fj gso MW-1 <50 <50 MW-2 g 8" 6060860 BG-3S i;l <50 YD LINED RETENTION BASIN Lrl�\ 1♦ ,7go� JI CP-15 lei J i/a 69 A 7: I/ 850 g10 `_.,�STFgMp ' <4Nrk � o r BELEWS STEAM S (� DUKE 500 ORAPHICSCALE 500 1,000 ENERGY CAROLINAS (IN FEET) DRAWN BY: C. DAVIS REVISED BY: C. WYATT DATE: 05/09/2019 DATE: 12/23/2019 CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 PROJECT MANAGER: A. ALBERT LEGEND ASSESSMENT MONITORING WELL - GREATER THAN USEPA DRINKING WATER EQUIVALENT LEVEL (4000 Ng/L) ASSESSMENT MONITORING WELL -GREATER THAN15A NCAC 2L .0202 STANDARD (700 Ng/L) ASSESSMENT MONITORING WELL -GREATER THAN CONSTITUENT BACKGROUND THRESHOLD VALUE (50 Ng/L) ASSESSMENT MONITORING WELL - LESS THAN BACKGROUND THRESHOLD VALUE BACKGROUND MONITORING WELL WELLABANDONED STRUCTURAL FILL AND COAL PILE MONITORING WELL BORON PLUME GREATER THAN THE USEPA DRINKING WATER EQUIVALENT LEVEL (4000Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. BORON PLUME GREATER THAN NC 02L STANDARD (700 Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOTAVAILABLE. BORON PLUME GREATER THAN BTV (50 Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY COAL PILE STORAGE AREA LINED RETENTION BASIN DUKE ENERGY CAROLINAS PROPERTY LINE GROUNDWATER FLOW DIRECTION STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE FIGURE 6-13a ISOCONCENTRATION MAP BORON IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 710 610 660 GI 620 <c 65° GWA-lDj CCR-6C CCR-13D GWA-30D 1 <50 1 1 1082E <50 <50 GWA-11D CCR-4D GWA-21 D 419 6685 // 529 tso M W-101 D 770 a GWA-31D GWA-275EXOB-1 CCf <50 7663 7845 55 GWA-19D ; GWA-20D AB-1 D > <50 V 9690 9265 M 710 `� EXOB-2 GWA-10D 8083 GWA-18D GWA-10DA <50 GW ,50 CCR-1 D zjo 9z l 1 A 11 I�r GWA-17D 760 51 MW-204D <5p GWA-16D 800 GWA-16DA s8p <50 ,+� � Bo �'790 + t el NOTES: 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR BORON IS 700 ug/L. 3. THE BACKGROUND VALUE FOR BORON IS 50 ug/L (AS SUBMITTED JUNE 2019). 4. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS MODIFIED FROM MODEL LAYER 15 (FALTAAND OTHERS, 2019). 5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017) AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA AND OTHERS, 2019). 6. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL R INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROL NA SPATIAL DATA SITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 8. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 9. ALL BOUNDARIES ARE APPROXIMATE. 10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 11. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). V 6g0 v C��-1 s70 860 7) <50 op N a oQM MW-203D <50 1 � ' ,8O GWA-9U <50 ° MW2-1 780 90 24D sso v �o �88p 7(� MIS°LET�LOOP 82�= MW 200D % 820 e BG-1D� sto , sso o %we 159 ° GWA--32/�= 42 �. � ♦ � // �92 CCR-7D I' I 5148 MW-103D GWA-2D 1 °tio CCR 8D <50 90 1 ,✓ago , 10017 � ( ��{( •� � MW-102D 1 CCR-8AD MW-201D I 1 AB-2D AB-3D 9363 Iso <50 G A-22D i1 9552 2836 CCR-9D r/ <50 CCR-11D r . -. . . r I wo (P;j 51 �Er.11 �770 CCR-12D�0 I 3` CCR-12DA GWA-5D 5 - LRB-2D 60� / 71� ` AB-6D <50 MW-104D ti 1T� <50 °Ok P 1 jO BTFq,N AB-7D°° •�� P�NraO <50 ,. (l eo i i � 13600 MW2-4 FOB-9 MW2-9 .. 26233 ( � 292 /�(( .. ♦ 828 � I 830 ago / szo o O o O° .01 ! qh° GWA-26D aso <50 830 �a60 s )I 1 / \ U-1,11 .- II MW-202D ;s <50 Sao ) GWA-7D D A <50 V-2D 870 i l aa0o9 .. i SF SFMW-4D o t�hro so SFMW-7D SFMW-3D ' -6D 80 4DUKE � ENERGY. CAROLINAS n 800 i '9° 790 CP 5D 2 m 1 740 ;4 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. DAVIS DATE: 05/09/2019 REVISED BY: C. WYATT DATE: 12/23/2019 CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 PROJECT MANAGER: A. ALBERT LEGEND ASSESSMENT MONITORING WELL -GREATER THAN USEPA DRINKING WATER EQUIVALENT (4000 pg/L) ASSESSMENT MONITORING WELL -GREATER THAN15A NCAC 2L .0202 STANDARD (700 pg/L) ASSESSMENT MONITORING WELL -GREATER THAN CONSTITUENT BACKGROUND THRESHOLD VALUE (50 Ng/L) ASSESSMENT MONITORING WELL- LESS THAN BACKGROUND THRESHOLD VALUE BACKGROUND MONITORING WELL WELLABANDONED STRUCTURAL FILL AND COAL PILE MONITORING WELL BORON PLUME GREATER THAN THE USEPA DRINKING WATER EQUIVALENT LEVEL (4000Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. BORON PLUME GREATER THAN NC 02L STANDARD (700pg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. BORON PLUME GREATER THAN BTV (50pg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY COAL PILE STORAGE AREA LINED RETENTION BASIN DUKE ENERGY CAROLINAS PROPERTY LINE GROUNDWATER FLOW DIRECTION STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE FIGURE 6-13b ISOCONCENTRATION MAP BORON IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA l el c-' 600 —65 660 8, .-.�.1q0 _. �2 �710 670 0 ,�-\\ -._.r 4 0 690�O SI p 780 ' 690 GWA52046R-/I\�� LOOP aZ0 810 MW-200BR CCR-13BR /GW50 A-1BR 156 B>o�•� <50 0 Boo I 11( s • ` • ♦ 1 ' r • •• ' - • �`'' , ;No ' 11 ♦ 790 T 870 p�0 �- ` ♦� AB-3BR AB t1 0 - I l` GWA-27BR r - 63 A-20BR 4221BRD 88706R 538 p v I MW-2016R <50 • AB-1BR AB-2BRD 1 / 760 GWA-19BR �•5630 20 <50 .... . . o DEEP BEDROCK GROUNDWATER MONITORING WELLS a o C\�, 4, J AB-1 BIRD, ARAULICALLY LRB-16R B-2BRD, AB-3BR WELLS ARE HYD ISOLATED FROM SHALLOWER BEDROCK. <50 i , • ,40� • �� GWA-16BR GWA-5BR ao <50 0 GWA-5BR�2j't(� \� 0, s8p LRB-213R ao° � $2 11 d MW 104BRA ;' ' MW-203BR AB-4BR <50 / 7��lw� ♦ <50 AB 46 50 50 �' o 1yo oke s ^ 1so 10 �790 R TF4 • . . ) l 770—� (.. MW-104BR -44" Q. a r. 1ao � 9 GWA-9BR Sao AB-9BR Tao �ti � aso 840 223 AB-9BRD <50 �. 810 . CP-3BR S <50 0 � 900 \l � � CP-2BR 800 $40.. ♦ Leo "0 790 NOTES: 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR BORON IS 700 ug/L. 3. THE BACKGROUND VALUE FOR BORON IS 50 ug/L (AS SUBMITTED JUNE 2019). 4. GROUNDWATER FLOW AND TRANSPORT BORON PLUME IS MODIFIED FROM MODEL LAYER 17 (FALTA AND OTHERS, 2019).. 5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017) AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA AND OTHERS, 2019). 6. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL R INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROL NA SPATIAL DATA SITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 8. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 9. ALL BOUNDARIES ARE APPROXIMATE. 10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 11. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). azo ° ♦ 8aa szo 0 O a00 6p � /n•ab' 90 9 / F��- ♦� 60 ; D �p�NENp�` 9 SFN i0 i` ,. GWA-26BR „• ' Gwi <50 s0o e 860 �8a0 \ MW 202BR °s0� <50 1 R SFMW-2BR CP-8BR ><0 R �• 190 0 CP-6BR i --i V SFMW-4BR t1 0 �9p0Y FAO ao DUKE ENERGY. CAROLINAS am GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. DAVIS DATE: 05/09/2019 REVISED BY: C. WYATT DATE: 12/23/2019 CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 PROJECT MANAGER: A. ALBERT LEGEND ASSESSMENT MONITORING WELL - GREATER THAN USEPA DRINKING WATER EQUIVALENT LEVEL (4000 Ng/L) ASSESSMENT MONITORING WELL- IN EXCEEDANCE OF 15A NCAC 2L .0202 STANDARD (700 Ng/L) ASSESSMENT MONITORING WELL -GREATER THAN CONSTITUENT BACKGROUND THRESHOLD VALUE (50 Ng/L) ASSESSMENT MONITORING WELL- WITHIN STANDARD BACKGROUND MONITORING WELL WELLABANDONED • STRUCTURAL FILL AND COAL PILE MONITORING WELL BORON PLUME GREATER THAN THE USEPA DRINKING WATER EQUIVALENT LEVEL (4000NG/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. BORON PLUME GREATER THAN NC 02L STANDARD (700 Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOTAVAILABLE. BORON PLUME GREATER THAN BTV (50 Ng/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY • • ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY COAL PILE STORAGE AREA LINED RETENTION BASIN • • DUKE ENERGY CAROLINAS PROPERTY LINE GROUNDWATER FLOW DIRECTION �— STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE FIGURE 6-13c ISOCONCENTRATION MAP BORON BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA I a g10 840 820 ppo �►-' -60 -65° I 660 70 ' A � o 0 7'Gr � GWA-30S CCR-13S 5.2 i 12.6 GWA-11S i, GWA-21S 203 GWA-31 S 137 _ p � 2.7 GWA-27S ` GWA-20S i 47.4 , GWA-19SA ,� ♦ 191 i ,o GWA-10SS . GWA-18SA 116 , i 145 'CCR-1S WA-18S 16.8 \ '60 r GWA-17S I 1.1 • .. GWA-16S 0.78 2 9 204S 8BO n 9°° • °ro0 6 11,0 )2O I 1 i 780 / GWA-24S 690 (1( ° \_6zoNA `'� iao-"/.�\�. �3 r�_.!� - ♦/ ♦-♦ ♦ O♦ k700 Q�P��r�✓� oa° y/DDLETO �.. NLOOP 820 11\i MW-200S BG-1S BG-2S ' 4. 25.9 GWA-32S r e°o 7.6 - 310 12.6 49.6 �• CCR-6S CCR-7S '"'�'G� WA-2S v NA 82.0 1.5 790 ,✓azo � °�'° ♦ mm�i �mS MW-102S \ � 06�♦ ♦ 80 o 1 Oa 610 GWA-26S 6.5 MW-2 v-1� .� �13.7 2.2 660 -3S 40 I LEGEND 6 -9S 2 2 A-22S ASSESSMENT MONITORING WELL- GREATER THAN NC 0 02L STANDARD (250mg/L) ^6 ♦ TJo ASSESSMENT MONITORING WELL- GREATER THAN CCR-11S GWA-3S BACKGROUND THRESHOLD VALUE (19mg/L) 22.0 9 ASSESSMENT MONITORING WELL- LESS THAN PERCHED WATER CONDITIONS OBSERVED IN 1 '- -_ ♦ ♦ Sao BACKGROUND THRESHOLD VALUE HE FIELD SUPPORT THAT THIS LOCATION IS LRB-1 S sa BACKGROUND MONITORING WELL DISCONNECTED FROM SHALLOW FLOW ZONE. + 7/, 1.1 la WELLABANDONED STRUCTURAL FILLAND COAL PILE MONITORING WELL CHLORIDE PLUME GREATER THAN NC 02L STANDARD ♦ - aso 7.5 tVVA- 2.8 E120 Ile r /NJ1\ O E■ SFMW-7S �r e �O . O � VI O LkF pOw L PRSrFgMpt4 BELEWS RESERVOIR I -- Q 11 1 -s' \\\ JA '\�` x,A% I I L 8_0 / `-� MW-202S DUKE 500 ORAPHICSCALE 500 1,000 1.4 - fe ENERGY (IN FEET) &. o 760 \77p --_ CAROLINAS DRAWN BY: C. WYATT DATE: 11/12/2019 _ REVISED BY: C..WYATT ALBE DATE: 12/23/2019 770 �,a 780 ''gO� ��ioo. CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 sO 790 'I6° s)mTerra PROJECT MANVVAGN/E1RV'.S nterracor .com y A. ALBERT otio . . �40 - (250mg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. CHLORIDE PLUME GREATER THAN BTV (19mg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY - - - ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) - - LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA - - • DUKE ENERGY CAROLINAS PROPERTY LINE TOPOGRAPHIC CONTOUR (10' INTERVAL) GROUNDWATER FLOW DIRECTION STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE NOTES: 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR CHLORIDE IS 250 mg/L. 3. THE BACKGROUND VALUE FOR CHLORIDE IS 19 mg/L (AS SUBMITTED JUNE 2019). 4. GROUNDWATER FLOW AND TRANSPORT CHLORIDE PLUME SIMULATION IS MODIFIED FROM MODEL LAYER 13 (FALTAAND OTHERS, 2019). 5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017 AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA NO OTHERS, 2019). 6. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY 13 BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATASITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 8. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 9. ALL BOUNDARIES ARE APPROXIMATE. 10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 11. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). FIGURE 6-14a ISOCONCENTRATION MAP CHLORIDE IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i I I �►-' -60 _ r r 670\� . 690_' " _ >>°`�++ �9° / 780.o\ nC 1`v✓' l Ill ,! \1�j0 GWA-24D y I \ � 690 °° 650 700 '/�j y �IDDLETIN Loop 0 I ~ MW-200D BG-1D BG-2D t� 8,20' CCR-13D ~ GWA-30D GWA-1D 38.6 GWA-32D - o00 12.2 sto, • �� ? 13.5 4.3 89.4 r ...1a° 70.8 ` ♦ • ♦ ' %�% • h.� I I04 . �f"�♦,�-�-fir rIr♦� / 11 • GWA-215GWA-2D ?gyp /870 ? etio 238 MW-102D MW-1031 I GWA-31 D i _LJ - MW-101D • 2.3 � r 720 i ♦A >so 4.9 �� GWA-22D rt �10.9 GWA-19D ,� °° ♦, • + � � - � - ti CCR-9D 3.6 CCR-2D 17.6 GWA-3C 237a,� �CR-11D / 9.7 GWA-10D • 16 • GWA-1ODA GWA-18D ��°° � 8.4 21.3 � GWA-4D� _ CCR-1 D ' LRB-1 D 2.4 26.5 �O r GWA-17D CCR-12DA • \ '60 • 1.1 2.3 CCR-12D > A-16D '�I® `a GWA-5D GWA-10.991F MW-204D (1.9 LRB-2D j0° goo/ Z 6.2 • • • D 0.88 1.4d MW-104D Y `°q MW-203D AB-4D,; 1io 1.2 ookFp, 3.6 _ Q 3.3 1�. a - 1p0 OtiF 1�0 770 > AB-7D ff • 6 6 6 ` AB-8D 1, \,1 0 790 15.6 0o GWA-6D v GWA-9D > 0 4.9 �40 60 - 5 V (\ - IL CP-3D l 7To 1 CP-2D ,B 800 MW2-7 / - o >90 790 �9 .I •.w 10.1 S . 840, FOB-9 jOII MW2-9 • 9.9 8?° 3.5 �. / GWA-8D ♦� ♦ 83o 7 83o 5.5Jp�� 90 86p 1 820, ♦ !I� 800 ( ♦♦ ♦� ♦ A• SFMW-2D CP-SD f / 0 '4r BELEWS RESERVOIR Z • � ' � • � 9°° g3p �LRD� h0 >40 � �O �p\NENP` r $ SFMW-5D 190 CP-7D Bap GWA-26D g8 r �i I r r , r • Q 6 -10.2 .� r % i `` 'do sF !� Aa° o �. • GWA-23D SFMW-4D U >4 60 9p° S: �i880 -L l�aa Epp 860{`""`7j g1p 860 e6° GWA-12D .-1 SFMW-3D SFMW-(D ^A° 630 -.... J�E, SFMW-6D °Po VVV ,SO 740 DUKE 500 ORAPHICSCALE 500 1,000 EENERGY.t BSO 780 ♦ ♦ 770 (IN FEET) \ CARO 1 4 DRAWN BY: C..WYATT WYA DATE: 12/23/2019 1 `J 760 ♦ �64 _ REVISED BY: C.. ALBE DATE: 12/23/2019 770 7y0 780 g0� ?60. CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 B0 790 'Ip° °s)mTerra PR1 OJECT MANAGER: A. ALBERT y www.synterracorp.com ti° . . LEGEND ASSESSMENT MONITORING WELL- GREATER THAN NC 02L STANDARD (250mg/L) • ASSESSMENT MONITORING WELL- GREATER THAN BACKGROUND THRESHOLD VALUE (19mg/L) ASSESSMENT MONITORING WELL- LESS THAN BACKGROUND THRESHOLD VALUE BACKGROUND MONITORING WELL WELLABANDONED STRUCTURAL FILLAND COAL PILE MONITORING WELL CHLORIDE PLUME GREATER THAN NC 02L STANDARD - (250mg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. CHLORIDE PLUME GREATER THAN BTV (19mg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY - - - ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) - - LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA - - • DUKE ENERGY CAROLINAS PROPERTY LINE TOPOGRAPHIC CONTOUR (10' INTERVAL) GROUNDWATER FLOW DIRECTION 3111 STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE NOTES: 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR CHLORIDE IS 250 mg/L. 3. THE BACKGROUND VALUE FOR CHLORIDE IS 19 mg/L (AS SUBMITTED JUNE 2019). 4. ` - CONSTITUENT CONCENTRATION SHOWN IS THE MOST RECENT VALID SAMPLE AVAILABLE BETWEEN JANUARY 2018 AND APRIL 2019. 5. GROUNDWATER FLOW AND TRANSPORT CHLORIDE PLUME SIMULATION IS MODIFIED FROM MODEL LAYER 15 (FALTAAND OTHERS, 2019). 6. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017) AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTAAND OTHERS, 2019). 7. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL& INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 8. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATA SITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 9. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOTADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 10. ALL BOUNDARIES ARE APPROXIMATE. 11. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 12. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 13. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). FIGURE 6-14b ISOCONCENTRATION MAP CHLORIDE IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i Clm I FAO >g� o= A I ° ,yo 6 I 1 � r U V 8g° n 800 4'. L 0 I 710 try I ,�0 690 10 ♦ I ♦ 610 700 `• LID AAO OLETO Wop B20 820- •. r ,,,'''�� 61 o 1 ° ` 740 60 L7. `so 0 9 790 91170 t - t ♦t C♦ LEGEND lie t 1 7g Gk P Ili 6 - oo-� oJ.yF�STFgMa 130 _ NOTES: \• • B g00 gZ0\� g30 7 830 1' 620 I • . �. � � ig6� � � � gs j O � -60 740 BELEWS CREEK U ~ �40 /per !� Apo 1 gg P� 'rho / P 740 (DUKE 500 ORAPHICSCALE 500 1,000 ENERGY CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/23/2019 CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-14c ISOCONCENTRATION MAP CHLORIDE IN BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA \m'� ON a 780 �MIDDLET {�\\ A10 _ON LOOP ; 2 \l �s ' I 110 ! 810 O . t I 8>0 . �- 1 T �I (\ �'SAO 790 >90 �60 L74. i 730 i I ell c LEGEND i 0 • '4p 1 �_... .. Z� � 1 ' • • I 1 t , A60- � 8 .-, 100 Dk'F,p 3TFq ' 18° go f< M'O<gpr Q. `,./'„/ f✓��f _\�; 1p0 -�`J If. QO ��- NOTES: . 6A0 . - • • . .. I10 d 870 O b°° ♦ 8 � , - 30 830 `, - yj 850 -WOO' •860740 ® '40 •� 03 O. �Apo I Q Igo O 600 °9° \-i l�aa � 60 .. '1A� �'S# Apo i $+ g70 860 B3 6p 'sp 16 �V��OP s O • O u ,'1 '40 GRAPHIC SCALE 6p0 DUKE 500 0 500 1,000 FIGURE 6-15a � ENERGY ISOCONCENTRATION MAP CAROLINAS (IN FEET) COBALT IN SHALLOW FLOW ZONE DRAWNBYc.WYATT.WYA DATE:12/16/2019 CORRECTIVE ACTION PLAN UPDATE REVISED BY: C. WYATT DATE: 12/16/2019 770 ➢,Q ' 780 'p0 '60. CHECKED BY: A.ALBERT DATE:12/16/2019 BELEWS CREEK STEAM STATION APPROVED BY: A.ALBERT DATE:12/16/2019 BELEWS CREEK, NORTH CAROLINA a. 0' PROJECT MANAGER: A. ALBERT -r ago GWA-24D �590 61'° I 090 1101., 700 GWA-30D 9.0 , 0 064064 D WA 050 � 0.09 G-1D `0. • CCR-13D � - -- . 07RCCR-5D CCR-6D 34A-11D =' ? CR4D` / 15.4 1. 2.8 M\ 840 ° 8° 6 7C I GWA-21D GWA-31D . 0.9 MW-102D <0.1 192 MW-101D GWA-27D 9.6 �� GWA-19D - GWA-2OD AB-1D AB-2D AB-3 34.8 70.2.8 i �•2.9 3� EXOB-2 GWA-10DA 1 CCR-2D 139 7.5 ° GWA-18D 0.12 CCR-1 D 0.78 GWA-17D '60 0.31 •�-- -.. �.. .. MW-204D 265 GWA-1 GWA-16DA Sop 0.92 I 690 - � J 780 ...iJ; ��o:� p ♦f 8t0 �MIDDLET . 14p � _ON LOOP 820 _ R-7D i . BG-2D 820s l BG-1 D 1100 0.49`sto GW-32D 0.050 CCR-8D 42.6 � GWA-2D 0.31 CCR-8AD l i V 11- MW-201 D 1� 0.81 0.04 -/ K". GWA-221 � <0.1 GWA-3D CCR-9D 0.1 0.14 CCR-11 D 1.0 GWA- 4 D' ♦! �� LRB-1 D • . ccc \\\ 40\ AB-5D < 0.1 Dq AB-4D 0.09 /-203D 1 1 r ttp �0 GWA-9D ,0 -- 10.18 0.11 �g Zca CCR-12D 9 .r- LRB-2D ///'''``` GWA-5D' ♦ 1.4 t � AB-6D 1 <0.1 �� 0 J ram,✓,° MW-104D 1g0 OI.I,F�S7Fq' AB-7DHa• moo* T9 0.06 44" 0.09 OB-9 1.0� W(() V\T[// 0.36 �. GWA-SD o ezp - 88p ♦ 880 7 8`�0 0.10 ' ♦ 860 830 •, .y,, .saw♦-� So yo o ato - ♦p1NE N SFMW-iD 10 / GW123D �- °s0 GWA-12D • '\ 790 ,.7Q 760 a,o / o SRO . 5p0 740 Py/ 730 �So LEGEND I � ASSESSMENT MONITORING WELL BACKGROUND MONITORING WELL WELLABANDONED STRUCTURAL FILL AND COAL PILE MONITORING ISOLATED EXCEEDANCE OF BACKGROUND --- INFERRED BACKGROUND CONTOUR ASH BASIN WASTE BOUNDARY - - ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY JLINED RETENTION BASIN COAL PILE STORAGE AREA - - DUKE ENERGY CAROLINAS PROPERTY LINE TOPOGRAPHIC CONTOUR (10' INTERVAL) GROUNDWATER FLOW DIRECTION STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) MEMO APPROXIMATE HYDROLOGIC DIVIDE : GWA-6D o s1.2 !V(} CP-3D ♦ /, V CP-2D �Bo " 807 2 1 • s 90 � GWA-7D 0.06 800 CP-SD IAW�-2D�% pZ0 ':1/L9!•I:I:1� (it740 rS77t1'�717►_7tf 'Qo SFMW-4D �4 ..:.%l1 ° 1Q0 SFMW-3D ) SFMW-7D Ao 0 0 rd� f' DUKE 500 ORAPHICSCALE 500 1,000 ENERGY CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT NOTES 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE IMAC FOR COBALT IS 1pg/L. 3. THE BACKGROUND VALUE FOR COBALT IS 2pg/L (AS SUBMITTED JUNE 2019). 4. ` - CONSTITUENT CONCENTRATION SHOWN IS THE MOST RECENT VALID SAMPLE AVAILABLE BETWEEN JANUARY 2018 AND APRIL 2019. 5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017 AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA AND OTHERS, 2019). 6. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINASPATIAL DATA SITE AT hftps://sdd.nc.gov/sdd/DataDownload/aspx. 8. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 9. ALL BOUNDARIES ARE APPROXIMATE 10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS 11. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83). FIGURE 6-15b ISOCONCENTRATION MAP COBALT IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA \P I ,4 �610 580 .. 580 . ,.•Y",•�6g0i � 6,y0 �4U >g� 180 88 °ro0 l- a 110 - p2 110 0 690 690L74. 760 ,0\,��1 \l �g5p 620 / ` `�'jg0 ��.. i�i T,1.. _, - I I ' • • I � Q\�.� ��0 (' 730 I _ _ goo` r - go 690 10j _. ,•/ ' -1 LEGEND 000 'So 1 I — I U g6g 00� 1 • • I 1 JI 'I 190 / ,g 0 owF�STFgM 136 NOTES: I I i1 I STRUCTURAL FILL (CLOSED) A DUKE ENE i►' j% CAR•• v �1A0. 90 740 III1 BELEWS CREEK '°° o a . GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-16 ISOCONCENTRATION MAP IRON IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i I ..4 -/._- -• Q I;lO 610 s r►-' -600 I°30 660 63° • 58 0 ° 5J �ti I 690 700 v C 760 I r •� 7 800 i[k JJ 18� 7680, 790 0 y" it 100 OOQ� Q i 01 I • • I I 0 0 8810 � / /� °°° �qp0 8577 840 e?p �9U0 - e1 �� I I• • I I- U' Imo` 7 870 , �� 00 8z8 830 830 D E 00 6 �`90 Y��r g°OgJ' y ••�I •1 -� - 880 I 860 g70 860 1 i I v ( '00 000 8p0 �6 yy O� 11° '60 k" Y,QO ♦ °° L74. 730 O°,I 1 ' • • I 1 P 190 0k'P , 130 do- �i ♦ ,9� NS7FgMP � NOTES: �p0 P (� DUKE u ENERGY CAROLINAS 0 _p696J s � -.g20 ® �40 i 740 , �- J Ap° .O .. 1p0.:... 740 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/16/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-17a ISOCONCENTRATION MAP LITHIUM IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i 1;10 610 63g Y ` RgO �_. 580 690 6'Y p & p a. p l el 880 BB° jBB� � T � •��.., 0 gj0 B60 u BBO Bap , _ .8330 \ 83, ,. 810 /• 790 \� 740 �60 8Y0 AAO ', � �. 730 I � s _ � a' ♦ � � �� • ~ � � � O 790� '�870 gti I i. LEGEND 780 —770 701 . 6�- 780 . i o — �( ..► ' 8ro B`5.O g50 Gk ♦.✓ Agg ) (FpOwFa 3rFgMp � • �Nr No as (� DUKE ENERGY CAROLINAS i 0 (3800J / 740 r1�111r Igo BELEWS RESERVOIR �40 J � Apo O h 1Ao 740 GRAPHIC SCALE I 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT NOTES: FIGURE 6-17b ISOCONCENTRATION MAP LITHIUM IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA MOW >g� Vo go 0 6S0 / A j F 1 28 �. _ -0\ r 0 780790 740 i i '"^--✓'/ /i�� SS �9 � ♦ g10 )0 � �MIDD ON LOOP 82 730 S R,-820 ♦ 0 I 90O ♦ ..� 810 /II � 71 ag LEGEND .. O • �40 1 �0 I 1 ' • • I 1 t , 770 9a0 Z* Ov k i / Igo FpO6yF i 1ao < 1 g6 �STFgMa 770 NOTES: )g0 '8p Q 0 Z -• <I •I g S10 RD 8S0 I 880 �.. g00 . •_g0 1�1 880 I800 S T -�...... 880 1 870 B60 �q0 � 760' ♦ 770 ljVV1 ♦ R ili illwhilmom"I'lao pf A 311HAll J \(�" 83p 838/•/� 820 � .y 850 O 0 (� DUKE u ENERGY CAROLINAS Q p800J �e' ® �40 740 I Igo �40 Ap0 '40 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/13/2019 CHECKED BY: A. ALBERT DATE: 12/13/2019 APPROVED BY: A. ALBERT DATE: 12/13/2019 PROJECT MANAGER: A. ALBERT W Ww.svnterracorD.COM FIGURE 6-18a ISOCONCENTRATION MAP MANGANESE IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA \P a ,4 �610 580 5p0 pp T 1pp� Dy C,f I • / / I I ` ,?� J 'j8p ppp i 850 p INe6p� 8g� �._ pep 666 I8� 8j0 B60 JAG 790 \ (\r �p v f 780 s\,e/�,,�iAO 400 'QO L71O 690 :. I J / .J j 690 700 �—� �,�DN LOOP 820 '. J �� 7 ♦ 820; ♦ � � `r0 1s 86 810 ♦ - N. _ \7 90 LEGEND 780 I ppp• . • . . \ v ' 110 Dv/NF P ' �� n J 19 / 1g0 DwF�STF,q , 13p 770 NOTES: 44, �— 060 ' V90 ♦ '`' �� - 830 ♦`y J f/ 860 V ppp 81p I I NpdYR ppp ... , Q 90 ,. 1pp 840 870 WOO e ♦ /. `,off O 740 o � / �60 ✓ \ �, :�So �P\VR f� DUKE %I ENERGY CAROLINAS � 1Ap 1dp o ' 740 GRAPHIC SCALE I 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-18b ISOCONCENTRATION MAP MANGANESE IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA imr V o a no � Y i • � � I � I 9°° � 870 - R �� • I J /" .P1NER�� 6s6 , ♦ /, � 880 °9° �_ 60 880 810 860 I � 830 L 20 690 • I I I I 1 700 g10 AAO (�MIDDJE-ro" LOOP 820 1160 r� 1 /� "790/ ~ ■. /810 1Ap I�t j90 ,g0 FpowF�SrFgM fr 0 r; ♦ 790 r80 t 6,o fir. 7a0 ° T 1 'So BELEWS RESERVOIR IW, ELEWS CREEK �0 4 1 y 7 "SO \ R '40 3 (DUKE 500 GRAPHIC SCALE500 1,000 ENERGY CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 YTem PROJECT MANAGER: A. ALBERT ��r, WWW-CVIItprrAr,.nr 1-f:nm FIGURE 6-18c ISOCONCENTRATION MAP MANGANESE IN BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA \P a >g� I I10 6 p30 / 7A I, 000 I I / I� 1 �.r c '60 / 60��80 780 \l 810 /♦ 790 \� ` 74 �80 ♦ 0 O �. 690 ♦ 620 • DD1E7pN L i 690 1�'°. �� :, g40 /(-LOOpi0 , -6 \ ; 0 �. / ''lam i� ..... � ♦f.'.♦ � • — �.�`� .r —mow. —. err♦ �� -I • � J � V 1111{{{11J��Jh\ M 0 '80 80� . • . 79 , it !o� N % 170 A Fp 0 'j90 R STFq Mp '8p _ BELEWS RESERVOIR ' r �900 840 I�,' �� •� �80 �y0 8079 i R I g10 870 � ��I�• . �� c740� 870 \ ; �� Op �� ♦ - TQ d �e � e ♦ o ggo azo, � I/ p600J .go , ♦♦�♦ sso PINE HALL 'SOROAD LANDFILL 740 _ �y .� I� I 1 • • g60 �I/ • � g30 000 _ � .1p0 I o 880 000 �_ l I g70 860 o - ;• h" - P '40 GRAPHIC SCALE DUKE 500 goo Aga ! 0 500 1,000 ENERGY �„p30 b fgs8g1 17B0, , \77p CAROLINAS (IN FEET) g . Q �— IV! ' �88 DRAWN BY: C. WYATT DATE: 11/12/2019 26p REVISED BY: C. WYATT DATE: 12/05/2019 770 )�Q 780 0� �80. CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 160 ,.. Y�w....... PROJECT MANAGER: A. ALBERT 'b .p www.synterracorp.com LEGEND NOTES FIGURE 6-19a ISOCONCENTRATION MAP STRONTIUM IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA I I �_ o lio 690 �O 610 -,0 s7 630,� t 000 f 660� C \� \ �'�O ,Bp� 81 �/090 �QO l ,sp OO y30 5g0 A ..� 62 � '\690 �1 19 ,�� .,J O W �� 740 v 0 O I 0 • . ' ,' � �� 650 \ • 700 ?,,, ' ` { TTO / LOOp� B20-82 - p730 v�oi C� `S - 1100 r Bio it . ''L IT . 750 � O - � v I L 1 780 LEGEND �� -- 760 7 `68 0 47asp `� 000• I • • • I 90 R t O� 170 0U o. P k 1y0 A a� 0 - ,g0 FpOlyF� i 130 0 F _ • I : • • I I ! '0 0 1 • , i'� t \../Jf I / 1 i NraO ;\�_ NOTE 900 010�� `i L3Y(/ �) �11 'TO �8�j90lu79 100 / O (� 10 ,9 ,c740� 870 I I ' • • I I (� Sz0 - / 03p , 630 6 <o I t pep 6 U eoo � � ♦ 83slo0 � .. .O _ 740 40 aso szo 880 880 Ipp1 p �---.� 860 B60 P 740 DUKE GRAPHIC SCALE pp0 'pa ! 500 0 500 1,000 ENERGY ��.g30 a fey. 8p1 780 . \770 CAROLINAS (IN FEET) p Q IV! 76p� ' Epp DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 770 7�0 780 0 'p0. CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 790 �.r .�..r 160 YTwPROJECT MANAGER: A. ALBERT 'b .y www.synterracorp.com FIGURE 6-19b ISOCONCENTRATION MAP STRONTIUM IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA imr Clm I 0 >g� el"° ' a' ♦ � � ♦ 630 ♦ , 660 I � 110 �►-' 600 , - �p690 690 4 90 �ti ' ° ggO650 700 'f ` �MIDDIET g10 rr NWop B20 �%� � � R �1 ` \1 820"" � r 0 " ♦ _ i _ _ 1170 Sp I • .ao A �9p� � � �8p � g°� 1 ' • • 79 , 1 v 1 Ili 0 - I � BpDwF�STFgMp ), - 0 g30 �� 830 a30 I/ "0 %� 880 °9° 60 8go 18e, r 0 160 880 I I.. �. l I 830 AAL 0 l� �go� S0 OPO �P1�R (� DUKE u ENERGY CAROLINAS a r 74. I , ♦. BELEWS RESERVOIR 40 '40 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT LEGEND FIGURE 6-19c ISOCONCENTRATION MAP STRONTIUM IN BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA >g� I 690lio / ,BO >�i �O ♦ � p 790 74 740 I, I 63pI❑ 0 660 p , , 690/�❑ 0l p-.;�/ .J❑ > �1 ♦ ♦.'.. ` 0>0 � �7 >j .Sil �J Y ! � 780 810 AJBG .' 620 JI❑ ❑ i� E i 650 700 y�/ MIDp 8 - AAp C 0 ! II y� � 07 6 ;SON LOOP 8Z0730 �1 810 � ❑ "'//l�� 111/// „�... o � �� , - 0000 El El o � 0 ' � ', ❑ it �g i `�❑ ,6p Q . 0 4> 9pp 790 R g80 9Ap 880 pro0 a r 'b 4 L-i �0 83p 830 86p g I RO�� I pyo �p\NE ❑ 860 ❑ Gk 19° FPOwFF ,' (STFq >40 _. BELEWS RESERVOIR (DUKE 500 ORAPHICSCALE 500 1,000 .g a 7 � ENERGY N FEET, J CAROLINAS DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/18/2019 CHECKED BY: A. ALBERT DATE: 12/18/2019 APPROVED BY: A. ALBERT DATE: 12/18/2019 PROJECT MANAGER: A. ALBERT >So LEGEI NOTES: FIGURE 6-20a ISOCONCENTRATION MAP TOTAL DISSOLVED SOLIDS IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 0 I - 4 --0M. 110 '`_ 790 �80 s� 600 I — 9 �O 78aA�BO iV 7q0� _��<. 690 ,% F 5g0 0 p �o szp690 G� A 24D 7 Tao sso 700 � MIDD � 11° 0 yo°N LOOpi�, 730 \\\\\ MW-200D BG-1D BG-2D GWA-1D 156�� a2o� o00 209 �- 123 ♦�� GWA-30D CCR-13D i 233 -�-�� o GWA-32D ` I 725�. 116� .. 1A.356 _ .--` . • /.. .. LEGEND ♦ • �`♦' • ,,�� ASSESSMENT MONITORING WELL - GREATER THAN GWA-2D p �, 4�� f GWA-21 D 55 q90 670 pry NC 02L STANDARD (500mg/L) 468 ie e ASSESSMENT MONITORING WELL- GREATER THAN 11 .. Q GWA-31 D • R-5D' 0 - I MW-201D BACKGROUND THRESHOLD VALUE (148mg/L) 104 1 CCC3 :lip . �� T - 99.3 ASSESSMENT MONITORING WELL- LESS THAN 6a GWA-22D l BACKGROUND THRESHOLD VALUE GWA-19D I',� ❑ ❑ CCR150 146 JUVVA-JDI BACKGROUND MONITORING WELL <250 F' �gq ie WELLABANDONED i776 ' CCR-2D % 1 GWA-10DA 477 STRUCTURAL FILL AND COAL PILE MONITORING WELL ` 4 IS l j ; 128 GWA-18D pp TDS PLUME GREATER THAN NC 02L STANDARD J� GWA-10D <250 GWA-4D LRB 1 D 128 TRANSPORT FROM MEAN ANALYSIS. FLOW AND CCR-1 D ® ® —TRANSPORT MODEL PREDICTED PLUME IS USED 155 . 1 WHERE EMPIRICAL DATA IS NOT AVAILABLE. I I r GWA-176 6p - � 100 GWA-16DA <250 0 MW-204D — <250 C GWA-16 '00� 1790 �00 —�+..� 16p °q MW-203D + 94.8 I 0 GWA-9D C 9 <250 AB-5D <250 <250 1 AB-4D 172 o o AB-7D <250 AB-8D <250 so 110 '9p �80 AB-9D 780 /\ 205 0 0 4v ! \ GWA l MW2-9 �: <250 . • . . 1 a'` -e ♦ - GWA-8D J 820 90 , �♦ J. • _ IC g8o �-p1NEH SFMW-iD IeGWA-26D - - GWA-23D l�aa � g60 860 GWA-12D .� \I 8110 7 //�� ///�J1^'/� 9 880 �• JG:.. SFMW-6D o � LRB-2D GWA ' � 135 MW MW-104D 109 0 LkP 79 / .1gp a°N,F�SrFq'Ha 130 o NrRO A GWA-6D \U v <250 �A QQQ �o �CP-3D CP-2D 800 ao "o 790 1Ap \ O .fl 800 CP-5D g7,0 �40 740 SFMW 4D 1� 7ijqre^"j)� • U �40 SFMW-7D 1 1 A0 �GRAPHIC SCALE DUKE 500 0 500 1,000 ENERGY 90 070\ 830 b BSO801 17B0, ♦ \77p CAROLINAS (IN FEET) V ♦ DRAWN BY: C. WYATT DATE: 11/12/2019 _ REVISED BY: C. WYATT DATE: 12/23/2019 �(j 9ou � � >so • �0q 770 y�Q 700 d@�i e �00. 10 APPROVED BY: A. CHECKED BY: A. ALBERT DATE: 12/23/2019 .__ PROJECT MANAGER: ALBERT DATE: 12/23/2019 ERT _ TDS PLUME GREATER THAN BTV (148mg/L) FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED PLUME IS USED WHERE EMPIRICAL DATA IS NOT AVAILABLE. ASH BASIN WASTE BOUNDARY - • ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY LINED RETENTION BASIN COAL PILE STORAGE AREA - - DUKE ENERGY CAROLINAS PROPERTY LINE TOPOGRAPHIC CONTOUR (10' INTERVAL) GROUNDWATER FLOW DIRECTION STREAM (AMEC NRTR) WETLAND (AMEC NRTR) APPROXIMATE HYDROLOGIC DIVIDE NOTES: 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOM EAN RESULTS FOR WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED. 2. THE 02L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L. 3. THE BACKGROUND VALUE FOR TOTAL DISSOLVED SOLIDS IS 148 mg/L (AS SUBMITTED JUNE 2019). 4.' - CONSTITUENT CONCENTRATION SHOWN IS THE MOST RECENT VALID SAMPLE AVAILABLE BETWEEN JANUARY 2018 AND APRIL 2019. 5. GROUNDWATER FLOW AND TRANSPORT TDS PLUME SIMULATION IS MODIFIED FROM MODEL LAYER 15 (FALTAAND OTHERS, 2019). 6. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2017 AND UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (FALTA NO OTHERS, 2019). 7. THE WATERS OF THE U.S. DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. 8. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATASITE AT https://sdd.nc.gov/sdd/DataDownload/aspx. 9. COAL PILE AND STRUCTRUAL FILL ASSESSMENT ARE ONGOING AND ARE THEREFORE NOT ADDRESSED IN THE CORRECTIVE ACTION PLAN UPDATE. 10. ALL BOUNDARIES ARE APPROXIMATE. 11. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 12. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. 13. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). FIGURE 6-20b ISOCONCENTRATION MAP TOTAL DISSOLVED SOLIDS IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i Ir 14m I �0 610 ~. •a ~_ s 630 • ` 580 5a0 690 0 & O a. p Ig� R rro= rs —630660 `� 6�'O I 89 / 660 A7 i / I \ .p 770 c 760 I r � 1,30 - �a 800 , 90 / O� M , �1790 l"! V6g6 gg0 n 000 _ 4'. 11,0 - )2 710 690 0 700 \� (-MIDD-Ory LOOP 820 1 810 i 820 ��♦. r 6Q ♦ 1-♦�► --fir+• ` ,ram ,�I .,90 70 +' ASH BASIN ,gJo 830 7 830 l 1- • _. 860 62U _ g 860 9° g80 r , �r p\NE o (� DUKE u ENERGY CAROLINAS STFgMa 790 740 ?60 V1. A 61 o/0 L..f.. i r BELEWS RESERVOIR �� jOv 'Q0 F Ad0 � a I: 3d0. '40 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/23/2019 CHECKED BY: A. ALBERT DATE: 12/23/2019 APPROVED BY: A. ALBERT DATE: 12/23/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-20c ISOCONCENTRATION MAP TOTAL DISSOLVED SOLIDS IN BEDROCK FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA \P I I;lo 610 63p Y ` 580 560 690 6'Y p & o a. p r 650 4 pp0 o 4p A70 690 j: - p 710 - 20 690 :� � � � � f 760 ♦ f g10 -MIDDIET ` AAo _ON LOOP 820 `� 810 .r 8z0 630 030 820 g10 •��1. RDA' • e`'° .i1��v p\N a , o00 _ GkP �' " , 1g0 PDlyF�s .i A30 '-/App TFgMp�N k" O C\ 610 800 6Ap v ,8 O )&o I'�} (� DUKE ENERGY CAROLINAS 790 ,60 � 730 "j 40 V 810 800 S �90 790 Apo l 740 BELEWS CREEK J C> pp V 1 App h� 740 GRAPHIC SCALE I 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT LEGEND NOTES FIGURE 6-21a ISOCONCENTRATION MAP THALLIUM IN SHALLOW FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA i I I;lo 610 630 Y ` RgO �_. 580 690 6'Y p & p a. p g80 880 �._ a9p 880 I8f 8j0 B60 Jf/ r G 83n 1 � 1 n 780 �Bo\ �1 \l 81o/• L..�90 �.ry �QO L71� 8Y0 AAO ', DD1ET0 / 0-. 820 � �� ♦ .,i 'SO 860 ♦ � � `�� • ~ � � � � fey ��J' 710 `"�"L✓ 8 °�° '1p° ^ • 78� LEGEND 83p 7 oD0 �/• '0 836 % A•y. •DIY ` �" i" _.Li.. s_ O O 860 �P 00 (n DUKE ENERGY e J-� CAROLINAS 1y0 FpOb%F 'j9l �STF-14, 0 (3800J r 740 .�WIIIr 1 \Igo BELEWS �///I RESERVOIR �40 J � Aao Apo 740 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 11/12/2019 REVISED BY: C. WYATT DATE: 12/05/2019 CHECKED BY: A. ALBERT DATE: 12/05/2019 APPROVED BY: A. ALBERT DATE: 12/05/2019 PROJECT MANAGER: A. ALBERT FIGURE 6-21b ISOCONCENTRATION MAP THALLIUM IN DEEP FLOW ZONE CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA 900 800 700 Z 0500 H J 400 W 300 200 100 g -a -- Bt (WEST) (EAST) COMPLIANCE BOUNDARY PARCEL I_ J IQ - III I n ACCELERATED REMEDIATION EXTRACTION BELEWS CREEK ASH BASIN DAM SYSTEM u COMPLIANCE BOUNDARY I I< rc I� GW/4t9D /�I ITDS I 922 _ a _ .�..- \ GWA-27BR Li 70 SIB-2BR ♦ / ♦ �/ / B 2836\/ / / \.`� ♦/ / \ ♦// / GWA-225 \- / i \ / I / \ / / \ B <sO / \ / GWA-20BR ! \TDS 864 �B 5630 \ \Li fi / / \ I / \ B 8870 d 292 \ / \ 1 / Li 60 I /� i \ / I \ I \ / \ / I / \ / \ /�{� \ / \ / I / \ / \ I / \ / \`Li 74 V I \ / \ / \ \ / .cl _ \ / ♦ B 63 / . /- _ - 'd 3aa \ \ . \ / \ / - \ \ \ / \ / - / - \ \ / . / - _ \ / . / - \ \ / \ / - . / - \ \ / . / - ' ` \ / \' \ \B <50 - \' .d a\I / \I — IrDS 9ta / \I ♦-.� ,d atD -Li t98 — I ♦ ,rss 773 \ /— I \ / / \I \ /— I \ / - \ /— I \ / -BEDROCK ✓i— 7DS 727 / \I ♦ /— / \I /1 \/\ .Li /d 27 \ /1 V\ Li 93 �\ \ _ /1 \ \/\ /1/\ /1 \ !jl \/\ / I /1 \/d 2 \ / 704 TDS 720.8 / / /- / / / / / / / / \ `-- \ TDS 7z3 \-- \ TDS tt00 \ ` — \ / ♦-- \ / 1' ♦ / 1' \ — \ / 1' ♦ — \ / \ Li / ��I/\/l \/ I / / l� \ l / l / \/I/\/I/ // /\///I/\///I/\//\/ /\/ / \ rss 4250I \ I TDs <250 \ I \ / \ rss A&2BRD B 422 / B TO //I `_ \ \\ /I — \\ i /I \ _-\?\♦ BEDROCK /I `_ Li - \\ i / I / \ / \\ /I — \\ \� /I `\ ` \ \\ /I — \\/ i �Ij\ / \♦ /I — \\/ i / I / ` / \� /I / \\ i /I / \_ \ \\ /I —, \ 7 TDS GENERALIZED GROUNDWATER FLOW DIRECTION TO THE NORTH LEGEND NOTES: 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN CALCUALTED BASED ON CENTRALTENDANCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO APRIL 2019. 2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L) 3. CHLORIDE (CI) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L) 4. NO MEAN ANALYSIS FOR BEDROCK WELLS (GWA-27BR, AB-113RD, AB-2BRD AND AB-3BRD) FOR CONSTITUENTS; CHLORIDE AND TOTAL DISSOLVED SOLIDS AB 9S WELL IN S HALLOW/SAPRO LITE ZONE V ASH PORE WATER FLOW LAYER NO DATA AVAILABLE WATER LEVEL ELEVATION AB 9D WELL IN DEEP/TRANSITION ZONE ANALYTICAL PARAMETER B Cl Li TDS AB 9BR WELL IN COMPETENT BEDROCK SHALLOW/SAPROLITE FLOW ZONE GROUNDWATER LEVEL ELEVATION REPORTING UNITS Ng/L mg/L Ng/L mg/L AB 4S WELL IN ASH PORE WATER 15A NCAC 02L STANDARD 700 250 NE 500 . DEEP/TRANSITION ZONE FLOW ZONE BACKGROUND THRESHOLD VALUE GENERALIZED WATER TABLE GROUNDWATER LEVEL ELEVATION 50 19 2 93 BEDROCK FRACTURE (SHALLOW FLOW ZONE)' BEDROCK FLOW ZONE GROUNDWATER BACKGROUND THRESHOLD VALUE ORIENTATION 50 LEVEL ELEVATION (DEEP FLOW ZONE)' 19 95 134 FILL MEAN BORON B CONCENTRATION L BACKGROUND THRESHOLD VALUE ( ) (R S0 3 30 181 SAPROLITE p <50 S MEAN CHLORIDE (CI) CONCENTRATION (mg/L) (BEDROCK FLOW ZONE)' TDS +n MEAN TOTAL DISSOLVED SOLIDS (TDS) 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND ® WEATHERED ROCK CONCENTRATION (mg/L) GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019. BEDROCK DUKEHORIZONTAL 0 125 250 500 SCALE: 1" = 500' FIGURE 6-22a WELL SCREEN 4nENERGY 5XVERTICAL SCALE:1 =200' VERTICAL EXAGGERATION GENERAL CROSS SECTION ASH BASIN - CONSERVATIVE C COMPLIANCE CAROLINAS DRAWN BY: C. BRUCE DATE: 08/01/2019 MEAN OF BORON, CHLORIDE, LITHIUM BOUNDARY / _ REVISED BY: C. BRUCE DATE: 11/15/2019 DISSOLVED SOLIDS 900 800 700 600 Z 5000 H 400 J W 300 200 100 CROSS SECTION LOCATION g --a -- B1 (WEST) (EAST) COMPLIANCE BOUNDARY COMPLIANCE BOUNDARY ACCELERATED EXTRACTION PARCEL SYSTEM BELEWS CREEK ASH BASIN DAM lz L L �L O w w w a o CCR-4S o 0 o G O m 900 GWA I9SA fA p m GWA 20SA I o (A C m As 1.3 a rc N N I¢ Q Q Q As 6.1 N N N 1AB.7S � N .. , im As SB07C7 O NNNIVAs07 m m m m w�LL Y N U m Oa800 � 3 -a 0 Sr 32 NA�Q NNQ U TI 0.7 SAPROLITE U C7 U BELEWS - FILL - RESERVOIR SApROLITE Be <0.1 AB -IS As 3.9 �� 700 / - " Gwh27S / - _ \ / - \ Sr Be O7 As 1.0 CCR�S A-2D TRANSITION ZONE - \ \ ` /I \\i hs 0.1 IGWA-22S GWA-09BR GWh27D \ I I GWA-ZOD I ♦ DTI <0.1 Sr 680 Be 0.1 ' pe 0.6 3.3 _ / \ \ / \ / \ I / 1 \ / / \ I \ / \ / \ I / 1 \ / ♦ / <0.1 \ / I / I <0.1 'I \ 1 ' 1 As 0.3 As 2A / _ _ _ / r2-2 - Sr 666 / \ / 1 / , \ / 1 / GWA-22D , 2.5 ;I /� As 4.1 EXOB-1 ✓ /\ \ DTI 0.3 1_ _ _ _ CCB-8AD /` ♦ \ - \ / /�-- \ �\-'Sr 62 \ / /� 0. <0.1 J�-_AsL87 00 \ \ / i '\ n a✓ /sr \ l sr 2a \ / I / \ / / / \ / I / \ / / /�-- \ / I / \ TI <0.1 / \ /I se 32 Be 1.5 \ z5/ \ I I \ / \ l i \ I \ l I \ l \ I . sr 42AB-0BR \ - / _ AB-30TI 02 �\ / I / As 3.3 rB. >600 1 n <0.1 oA TI 02 / 797 \ \ { / \ ^T� / \ / \ / 1 /\-/Ag.26R Be ._\_a / \ I Sr.As 1.0 \ / I �' � /1 \ /1\/♦ /1 \ \ /1�\/�/ TI [a1 / 15 Sr CCR-8D / - / - /\ \ - \ / ' As \ \ - 1 ' / - ��1 �� \ - \ ' ' /1 \ ' TI / `, GwA2oert \ I eo 1 Be 0.1 sr s90 \- I Be os Be [0.1 TI oz \ ns o _ \ . / �/ �� \ \ \ / {-• T~ _ -/ y� / -/ \ /// -/ \ / _ -/ B. Z •/ GWA-190 \ / I / \ \ / I i \ i Sr 824 i\ - I i \ /� / / _\TI OA _ \ / - \ .Sr 1680 -Sr 436 \ i / = 0.3 - \ i / - \ \ / - \ / \ / - \ i \ i I -\ \ \ �/ - _�J \ �/ - h%_- I \ \I/71 co.1 - �� / \I \�L- -BEDROCK ✓�- Z As 15 02 / 05001 /Sr Ti W \�- J 400 ;//I / \` \ �\` /I / \\ ` \`//I / \`�\` BEDROCK �\\//I / \ i\� /I / \\ \ i\\//I \\ \� /I / \\ i\�//I \\ ♦ \\ /I \\ i\�//I / \\ \� /I / \\ \�iK\\ \\ /I / \\ i\�//I \\ ♦ \� /I / \\ i\�//I \\ ♦ \� /1 -, //I / \\� /�~ i\�//I \\ ♦ \. W \ I/1\ /-/\I I -/\I I/1\ /-/\I I\ /- \I I/1\ -/\I I/1\ /-/\I I/1\ /-/\I I/1\ /-/\I I/1\ /- 300,1♦/\/\I/1\//\I/1\/\/\I/1\//\I/1\/\/\I/1\/�/\I/1\/\/\I/1\/-i.I\/�/\lip\//\I/1\/\/\I/1\//\I/1\/\/\I/1\//\I/1\/\/\I/1\//\I/1\/\/\I/1\/�/\I/1\/\/\I/1\/\/\I/1\/\/\I GENERALIZED DIRECTION GROUNDWATER W TO DI \\ i\�//1 \\ /\� /1 / \\ i\�//I \\ /\� /1 / \\ i\�//1 \\ /\� /I / \\ i\�//I \\ /\� /1 / \\ i\�//I NORTH 200 / \2`.-\ \ li-\�1%-7\ \ li-\�\ l�`.-\ -1 /-\�\ l-� 1 /. -\ 1 -7\ .- -\ NOTES: 100 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN CALCUALTED BASED ON CENTRAL TENDANCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO APRIL 2019. 2. ALL CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L) 3. NO MEAN ANALYSIS FOR BEDROCK WELLS (GWA-27BR, AB-113RD, AB-213RD AND AB-313RD) FOR CONSTITUENTS; ARESNIC (As), BERYLLIUM (Be), STRONTIUM (Sr) AND THALLIUM (TI) LEGEND AB 9S WELL IN SHALLOW/SAPROLITE ZONE AB 9D WELL IN DEEP/TRANSITION ZONE AB 9BR WELL IN COMPETENT BEDROCK AB 4S WELL IN ASH PORE WATER V GENERALIZED WATER TABLE BEDROCK FRACTURE ORIENTATION FILL 0 SAPROLITE ® WEATHERED ROCK BEDROCK WELL SCREEN COMPLIANCE BOUNDARY V ASH PORE WATER FLOW LAYER WATER LEVEL ELEVATION SHALLOW/SAPROLITE FLOW ZONE GROUNDWATER LEVEL ELEVATION V DEEP/TRANSITION ZONE FLOW ZONE GROUNDWATER LEVEL ELEVATION BEDROCK FLOW ZONE GROUNDWATER LEVEL ELEVATION f D o.5 MEAN ARSENIC (As) CONCENTRATION (pg/L) o3 MEAN BERYLLIUM (Be) CONCENTRATION (pg/L) -MEAN STRONTIUM (Sr) CONCENTRATION (pg/L) o.1 MEAN THALLIUM (TI) CONCENTRATION (pg/L) - NO DATA AVAILABLE ANALYTICAL PARAMETER As Be Sr TI REPORTING UNITS pg/L pg/L pg/L pg/L 15A NCAC 02LSTANDARD 10 4* NE 0.2* BACKGROUND THRESHOLD VALUE 1 0.3 46 0.2 (SHALLOW FLOW ZONE)' BACKGROUND THRESHOLD VALUE 1 0.1 73 0.2 (DEEP FLOW ZONE)' BACKGROUND THRESHOLD VALUE 2 0.2 99 0.1 (BEDROCK FLOW ZONE)' - INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACs) OFTHE 15A NCAC 02LSTANDARD APPENDIX 1, APRIL 1, 2013. 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DEC EMBER 2018 AS SUBMITTED IN JUNE 2019, 900 800 700 00 co 600 > Q Z Z 5000 Lu 400 J W 300 200 100 CROSS SECTION LOCATION 900 800 700 00 IO Q600 Z Z 0500 Q J 400 W 300 200 100 g -a -- BF (WEST) (EAST) III COMPLIANCE BOUNDARY PARCEL IQ /II IO ACCELERATED REMEDIATION EXTRACTION BELEWS CREEK ASH BASIN DAM SYSTEM u COMPLIANCE BOUNDARY I I Io ♦ I ♦ / \ I \ /_ I l� 1 slss / \ ; ' IF. 2400 \/ -♦ \/ �\ / / I ra s+ /\ -1 /- - ♦/ / \ I \/ \/ -\— 1'%/I �/- 1♦/�/ -�\/ '\ �I / T\ /\/ --- � - /7 I /-1- \/ `/ -\ \/ '\ /I -/ '//\ \/ -\— 1'/I /-1/ \/ / \ /I - \/ \/_ -\— 1'/I /-�/7 am m/ \i l\i Mh +zz0ozw,llr-ms; = 'i\— /I /\ / \— /I /-1•/� w„ s� /I \♦ / \ _ ♦ /I \ 2+ \ / ♦ / �_\ ♦ / — ♦ /I / �� \ — _ . I ♦ ♦ / / / ♦ / ♦ / — ♦ /I / ♦ ♦ / ♦ / — _ ?JI \ / ♦ ♦ / \ / — -BEDROCK ✓i ♦ / \ / — — ♦ /I �/ ♦ / \ / — — \ /I \/\I/F• /\/ \I/1\/\/\�l1 \ \I/1♦/\/\/1 \ I wssa/n6 /♦/1/ \/\I/1\/ 1 1♦/\/\/1 \/\I/1\/\'I/1♦/\..��/�\/\I/1\/\/\/1/�\/\I/ ♦/\/\ F. ♦/\/\I/1//\/\I 1♦/\/\I/1i\�il/1♦/\/ca �\ \I/1♦/\/�I/�\/— \I ,r'F. /\I/1♦ \/ /\I ♦/ I ♦/ /\I ♦/ I ♦/ /\I ♦/ I ♦/ /\I ♦/ I ♦/ /\ ♦/ I ♦/ /\I / i l \ / I / \ i l \\/ I / \♦�\ 'BEDROCK / \\/ I \ \ / \�/ I / \♦i l \ / I / \ l \�/ I / i l \ / I \ i \ / I \♦� / \ / I / \ iT\\7�I1� l \ / I / \ i / \\/ I \♦� / \ / I / \ i l \\/ I �\ / I -�\♦%/I , 1 ♦ � \ / \I / 1 \ � \ / \ I / 1 ♦ � \ / \ I / 1 \ \ / \I / 1 ♦ � \ / \ I / 1 \ � \ / \ I / 1 ♦ � \ / \ I j f"\ � \ \I / 1 ♦ � \ / \ I / 1 ♦ � \ / \ I / 1 ♦ � \ / \I / 1 \ � \ / \I / 1 ♦ � \ / \ I / 1 ♦ � \ / \I / 1 ♦ � \ / \I / 1 \ � \ / \ I / 1 ♦ � \ / \I / 1 \ � \Trj � �\ / \I / 1 ♦ � \ / \ I / 1 ♦ � \ / \I �1♦�\/\I/1�/�/\I/1♦�\/\I/1//�/\I/1\�\/\I/1�/\/\I/1♦�\/\I/1��,.I\/�/\I,�i/�/\I/1\�\/\I/1�/�/\I/1\�\/\I/1,/�/\I/1\�\/\I/1//�/\I/1♦�\/\I/1�/\/\I/1\�\/\I/1�/\/\I/1♦�\/\I GENERALIZED //I \\ /�\ /I / \�� /\\/ I \♦� /�\ /I / \\� /\`/ I \\� /�\ /I / \�� /\\/ I \\� /�\ /I / DIRECTION GROUNDWATER W TO DIO/ \\i �\\/ I i \\i �\` /I / \\i �\\/ I / \♦i �\` /I / \\i �\\/ I i \\i ��\ /I / \\i �\\/ I i \\i ��` /I / \`i �\\/ I / \♦i �\\ /I / \\i �\`/ I i \\i l ♦ / I ♦ /— \ I \ / ♦ - \ I ♦ /— \ I \ / ♦ - \ I ♦ /— \ I \ / ♦ - ♦ I \ / NORTH ♦ /— ♦ I \ / \ - \ I ♦ /— \ I \ / ♦ - ♦ I ♦ /— ♦ I \ / ♦ - \ I ♦ /— \ I \ / ♦ - ♦ I ♦ /— \ I \ / ♦ - \ I ♦ /— \ I \ / ♦ _ \ /I / _ / _ / / 7/ -1 ./ �\ \.-\.r./, �\ \ _\ /, �\ \ -\ r-/ �1 \,-� r.l, ,,1 \,-� r.l, �1 \ -\ r./. ,,1 \.-� r./, �1 \--\ r./, \ \.'� LEGEND AB 9S WELL IN SHALLOW/SAPROLITE ZONE AB 9D WELL IN DEEP/TRANSITION ZONE AB 96R WELL IN COMPETENT BEDROCK AB 4S WELL IN ASH PORE WATER GENERALIZED WATER TABLE BEDROCK FRACTURE ORIENTATION FILL 0 SAPROLITE ® WEATHERED ROCK BEDROCK WELL SCREEN COMPLIANCE BOUNDARY NOTES: 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEAN OR GEOMEAN CALCUALTED BASED ON CENTRAL TENDANCY OF DATASET USING DATA 2. ALL CONCENTRATIONS ARE IN MICROGRAMS PER LITER (mg/L) 3. NO MEAN ANALYSIS FOR BEDROCK WELLS (GWA-27BR, AB-1BRD, AB-2BRD AND AB-3BRD) FOR CONSTITUENTS; COBALT (Co), IRON (Fe) AND MANGANESE (Mn) - NO DATA AVAILABLE ASH PORE WATER FLOW LAYER ANALYTICAL PARAMETER Co Fe Mn WATER LEVEL ELEVATION REPORTING UNITS Ng/L pg/L Ng/L S HALLOW/SAPRO LITE FLOW ZONE 15A NCAC 02L STANDARD 1* 300 50 GROUNDWATER LEVEL ELEVATION BACKGROUND THRESHOLD VALUE 0.6 1600 40 DEEP/TRANSITION ZONE FLOW ZONE (SHALLOW FLOW ZONE)' GROUNDWATER LEVEL ELEVATION BACKGROUND THRESHOLD VALUE 2 226 57 (DEEP FLOW ZONE)' BEDROCK FLOW ZONE GROUNDWATER BACKGROUND THRESHOLD VALUE 0.8 341 64 LEVEL ELEVATION (BEDROCK FLOW ZONE)' w6= a 3 MEAN COBALT (Co) CONCENTRATION (pg/L) MEAN IRON (Fe) CONCENTRATION (ug/L) MN +=z6B MEAN MANGANESE (Mn) CONCENTRATION (pg/L) * - INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACs) OF THE 15A NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013. 'BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MAY 2015 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019. 900 800 700 600 Z 5000 Q 400 J W 300 200 100 CROSS SECTION LOCATION Notes: 1. Surface water samples identified with "SW-BL" are Surface Water moo �o\° Affected collected from Belews Reservoir Legend 2. Surface water samples identified with "SW -DR" are collected from the Dan River ■ S-02D p 5W-BL-U2 G o 00 �X • S-03D O SW-BL-U3 ��" • ° SW-BL-BG g SW-DR-01 / oo \ Potential Mixing Seeps V SW-BL-D *SW-DR-02 SW-BL-D2 ■ SW-DR-03 Affected goo o\° X SW-BL-GWA-04D/S 0 SW-DR-04 Generally T *SW-BL-5-06 5W-DR-BG 0 Unaffected ❑ SW-BL-S-07 SW-DR-U o o\ m �x 0 SW- BL-5-13/14 *SW-DR-UA o� �� `s\ A SW-BL-U Potential Mixing �o\° / \ moo TO. ° ry\° 80 /o o C� 80% R ❑ Generally Unaffected 0 * �°� 60% S� 60% 00 ❑ ■ cO • 40% 40%\ ❑ °\° O� Oo 20% 20% 80% 80% Io oo 2 CCI X o 0 0 o ry0 �O 00 Co ao o o 60% Z� 60% Nd �—Ca — —CIS Surface • o\° goo /40% 40%\ Water V O o g ❑ � 0 20% Z 0 0 0 p 20% g coon o IS oa N o moo° Ca — Seep Legend — Cl ■ S-01 ❑ S-08 S-02 O S-09 DUKE DRAWN BY: R. Badum DATE: 9/9/2019 FIGURE 6-23 S-03 A S-10 ENERGY REVISED BY: CHECKED BY: A.ALBERT SEEP AND SURFACE PIPER S-04 '7 S- 11 APPROVED BY: A. ALBERT DIAGRAMS S-05 0 S- 12 PROJECT MANAGER: A. A.LBERT CORRECTIVE ACTION PLAN UPDATE Z S-06 X S-15 116'1 BELEWS CREEK STEAM STATION * S-07 synTerra www.synterracorp.com BELEWS CREEK, NORTH CAROLINA Corrective Action Plan Update December 2019 Belews Creek Steam Station SynTerra Figure 6-24 Pourbaix Diagram for Iron -Water System Included in Section 6 text O OUTFALL DAN RIVER WATER INTAKE LOCATION � � � I EXTRACTION AND CLEAN • WATER INFILTRATION 9 0 , WET WELL AND / PUMP STATION p o 0� vv PROPOSED EXTRACTION o PHYSICAL- CHEMICAL COLLECTOION AND PUMP STATION PROPOSED EXTRACTION / \ TREATMENTSYSTEM COLLECTION AND PUMP STATION PROPOSED CLEAN WATER I I � ° � ` FILTRATION STORAGE TANK Q °/ ASH BASIN o o �48" MANHOLE I PROPosED SUHEACE e WITH AIR VENT WATER TREATMENT SYSTEM A> , I O\ / v� p — / 48" MANHOLE? • • WITH AIR VENT _ _ = NOT FOR CONSTRUCTION �� - •� p LEGEND (2.67 ACRES) EXISTING EXTRACTION SYSTEM WELLS EX-1 THRU EX-10 PROPOSED EXTRACTION WELL IN SAPROLITE 4 PROPOSED / \— ® PROPOSED CLEAN WATER INFILTRATION WELL IN SAPROLITE ° CLEAN • ' WATER PHYSICAL -CHEMICAL TREATMENT SYSTEM — —; _ • PROPOSED EXTRACTION WELL IN TRANSITION ZONE — 4 ° • INFILTRATION --- ® PROPOSED CLEAN WATER INFILTRATION WELL IN TRANSITION ZONE • � • HORIZONTAL o / � WELL �i PROPOSED EXTRACTION WELL IN BEDROCK PROPOSED MAIN WATER LINE FROM THE ® PROPOSED CLEAN WATER INFILTRATION WELL IN BEDROCK DAN RIVER WATER INTAKE LOCATION TO THE WATER TREATMENT SYSTEM ION PROPOSED CLEAN WATER INFILTRATION HORIZONTAL WELL (SAPROLITE) p / • EX-4? COLLECTION AND PUMP STATION PROPOSED CLEAN WATER INFILTRATION PIPING PROPOSED CLEAN WATER INFILTRATION PIPING FLOW DIRECTION 4g PROPOSED EXTRACTION PIPING N =IBM- PROPOSED EXTRACTION PIPING FLOW DIRECTION 0 •,' EX 6 — — — — — — — DECANT PIPING op FLOW DECANT PIPING FLOW DIRECTION ✓ • EX-7 0 I DUKE ENERGY CAROLINAS PROPERTY LINE ASH BASIN COMPLIANCE BOUNDARY %/ • EX-8 WASTE BOUNDARY a \\ ASH BASIN PONDED WATER \ a / / EXISTING EXTRACTION NOTES SYSTEM (EX-1 THRU EX-10) 1.)ALL BOUNDARIES ARE APPROXIMATE. I 2.) DUKE ENERGY PROPERTY LINES AR E REPRESENTED SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A M IX OF SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE LOCATIONS ARE DEEMED TO BE APPROXI MATE. \\ ° PROPOSED EXTRACTION IJ 3 )THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT BE USED FOR DESIGN OR ENGINEERING PURPOSES THE TOPOGRAPHY BASED / \\ COLLECTION AND PUMP STATION / "O EX- ONACOMBINATIONOFSOURCES. LIDAR DATA OBTAINED FROM NC FLOODPLAIN MAPPING PROGRAM -SPATIAL DATA DOWNLOAD AT https://sdd.nc.gw/Dat Download.asp,# DATA WAS SOURCED FROM THEIR PHASES -2015 QL2 LIDAR \\\ \ / \ / PROPOSEDCLEAN WATER 4.) THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE U.S. ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS PRELIMINARY JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAM BOUNDARIES WETLANDS AND STREAMS BOUNDARIES WERE \\ \ // FILTRATION STORAGE TANK OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL AND INFRASTRUCTURE INC. NATURAL RESOURCE TECHNICAL REPORT(NRTR) FOR BELEWS CREEK STATION", DATED JUNE 2015. 5.)SITE FEATURES INCLUDING UTILITIES ARE BASED ON SEVERAL SOURCES. ANY UTILITIES SHOWN ARE FOR REFERENCE PURPOSES ONLY AND HAVE NOT BEEN FIELD VERIFIED WITH REGARDS TO THEIR HORIZONTAL OR VERTICAL LOCATIONS IN THE FIELD. ALL FEATURES INCLUDING UTILITIES ARE DEEMED TO BE APPROXIMATELYLOCATED. \ o o \\ PROPOSED SURFACE \; 2017 AERIAL PHOTOGRAPHS OBTAINED FROM NCONEMAPAT hops://nconemap.maps.a,,g,s,�m/apps/V,ebaPP"eWar/,nd..hvnnm=208a9b36a°4841rma2ha64347dO4a2h WATER TREATMENT \ SYSTEM 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM WSP FLOWN ON APRIL 17, 2014. 6.) DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIP 3200(NAD83 AND NAVD 88. / GRAPHIC SCALE 200 0 100 200 ENERGY REMEDIAL AETERNATIVE 3 IN FEET WELL SYSTEM LAYOUT CAROLINAS DRAWN BY: J. CHASTAIN DATE:12/15/2019 GROUNDWATER REMEDIATION BY EXTRACTION WITH o\� / , REVISED BY: DATE: - CHECKED BY: J.CLEMMER DATE:12/15/2019 CLEAN WATER INFILTRATION AND TREATMENT / APPROVED BY; J.CLEMMER DATE:12/15/2019 CORRECTIVE ACTION PLAN UPDATE PROJECT MANAGER: A.ALBERT BELEWS CREEK STEAM STATION s / WnTerra www.synterracorp.com BELEWS CREEK, NORTH CAROLINA PRESSURE CONTROL VALVE MAGNETIC FLOW METER FINISHED GRADE\ S \ PRESSURE GAUGE/ /CONCRETE VAULT 1LT WATER LEVEL SEN OR A NU ISIBLE MOUNDING OF GROUNI APPROXIMATE n VAULT LID WITH CHANNEL FRAME FLOW SHUTOFF SOLENOID ,/VALVE -(NORMALLY ENT WITH 5 % M//// r MAGNETIC FLOW METER SIGNAL FROM: LOW LEVEL SHUT-OFF SENSOR VAULT WATER LEVEL SENSOR INSTRUMENTATION CONDUIT SIGNAL FROM: FLOW SHUTOFF SOLENOID MAGNETIC FLOW METER PRESSURE CONTROL VALVE WELL HEAD PRESSURE TRANSDUCER INSTRUMENTATION/ CONDUIT HEADER ELECTRICAL CONDUIT Eli HEADER ELECTRICAL CONDUIT / SEALED OPENING (TYP.) RECHARGE PIPE, 1" HDPE/ RECHARGE HEADER PIPI /HDPE DIAMETER VARIES DUKE NOT TO SCALE FIGURE 6-2N REMEDIAL ALTERNATIVE 3 tnENERGY CONCEPTUAL VERTICAL CLEAN WATER CAROLINAS DRAWN BY: J. CHASTAIN DATE:12/9/2019 INFILTRATION WELL SCHEMATIC REVISED BY: DATE:- REMEDIATION BY EXTRACTION COMBINED WITH CHECKED BY: J. CLEMMER DATE: 12/9/2019 APPROVED BY: I. CLEMMER DATE:12/9/2019 CLEAN WATER INFILTRATION AND TREATMENT PROJECT MANAGER: A. ALBERT CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION synTena www.synterracorp.com BELEWS CREEK, NORTH CAROLINA VAULT (SEE FIGURE 6-25b) FOR REMOVABLE WATER TIGHT SEAL VAULT WELL CONTROLS WITH VERTICAL (CLEAN -OUT) WITH AIR VENT / /SENORS IN THE HORIZONTAL WELL REPOSITIONED GROUND SURFACE WELL CASING GENERALLY BASED ON INFORMATION FROM ELLINGTON, DTD ORIZONTAL WELL SCREEN tDUKE ENERGY CAROLINAS 4 synTerra LOW LEVEL SHUT-OFF SENSOR AND PRESSURE TRANSDUCER REPOSITIONED NOT TO SCALE DRAWN BY: J. CHASTAIN DATE: 12/9/2019 REVISED BY: DATE: - CHECKED BY: J. CLEMMER DATE: 12/9/2019 APPROVED BY: J. CLEMMER DATE: 12/9/2019 PROJECT MANAGER: A.ALBERT www.synterracorp.com CLEAN WATER INFILTRATE SUPPLY LINE WELL CASING WITH TYPICAL CONSTRUCTION ANGLE OF 12° FROM HORIZONTAL GROUND SURFACE NOT FOR CONSTRUCTION FIGURE 6-25c REMEDIAL ALTERNATIVE 3 CONCEPTUAL HORIZONTAL WELL REMEDIATION BY EXTRACTION COMBINED WITH CLEAN WATER INFILTRATION AND TREATMENT CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA FINISHED GRADE VAULT LID WITH CHANNELFRAM MAGNETIC FLOW METER PRESSURE GAUGE SAMPLE VALVE SWITCH BOX TO: RSIBLE PUMP VAULT WATER LEVEL SENSOR ROCK BEDDING jCASING CENTRALIZE APPROXIMATE LEVEL CONTROL SENSOR C tDUKE ENERGY CAROLINAS 0 synTena R A yG� 2 t WWIII LEVEL CONTROL SENSOR WELL SCREEN l�1 MANUAL FLOW CONTROL VALVE DRAIN W/COMPRESSION CAP/ I WELL/PIPE GUIDES I °a CEMENTWITH5 % BENTONITE 12' BOREHOLE 6" WELL CASING THREADED JOINTS to I I° I BENTONITE SEAL I I I I WATER LEVEL PRESSURE TRANSDUCER CABI I I I WELL PUMP POWER CABLE I SAND PACK I I I I I I GNAL FROM: )W LEVEL CONTROL SENSOR 'GH LEVEL CONTROL SENSOR )W-LOW SHUT-OFF SENSOR INSTRUMENTATION CONDUIT SIGNAL FROM: MAGNETIC FLOW METER PRESSURE TRANDUCER INSTRUMENTATION CONDUIT HEADER ELECTRICAL CONDUIT ELECTRICAL CONDUIT SEALED OPENING (TYP.) j DISCHARGE PIPE, 1" HDPE/ HEA y j ER IPE /HDPDE DIAMETER VARIES FOR CONSTRUCTION NOT TO SCALE FIGURE 6-25d REMEDIAL ALTERNATIVE 3 CONCEPTUAL EXTRACTION WELL SCHEMATIC DRAWNBY:: CHASTAIN DATE:12/9/2019 REMEDIATION BY EXTRACTION COMBINED WITH REVISED BY: DATE: - CHECKEDBY:J.CLEMMER DATE:12/9/2019 CLEAN WATER INFILTRATION AND TREATMENT APPROVPROJECEDBY:J.G R:A.ALR DATE:12/9/2019 CORRECTIVE ACTION PLAN UPDATE PROJECT MANAGER: A. ALBERT BELEWS CREEK STEAM STATION www.synterracorp.com BELEWS CREEK, NORTH CAROLINA 36" MIN OR TOPSOIL TO 'ING SURFACE FABRIC 6" MAGNETIC LOCATION TAPE 12" DEEP CLASS II BACKFILL (EXISTING FILL MAYBE USED IF ACCEPTABLE) MAINTAIN VERTICAL OR SLOPED FACE MINIMUM 4" SEPARATION BETWEEN PIPES CLASS I BEDDING 6" MIN ,ELECTRICAL CONDUIT ELECTRICAL CONDUIT O O� HDPE CLEAN WATER OR GROUNDWATER CONVEYANCE 6" +MIN 1 4" MIN 24" MIN 4" MIN NOTES: 1. 4" MINIMAL HORIZONTAL SEPARATION BETWEEN ALL PIPE AND CONDUIT. 2. 6" VERTICAL SEPARATION WHEN CROSSING OVER ALL PIPE AND CONDUIT. 3. 36" MINIMUM COVER FOR ALL PIPE AND CONDUIT. 4. PLACE BACKFILL AND FILL SOIL MATERIALS IN LAYERS NOT MORE THAN 8" IN LOOSE DEPTH FOR MATERIAL COMPACTED BY HEAVY COMPACTION EQUIPMENT AND NOT MORE THAN 4 INCHES LOOSE DEPTH FOR MATERIAL COMPACTED BY HAND OPERATED TAMPERS. 5. PLACE BACKFILL AND FILL MATERIALS EVENLY ON ALL SIDES OF STRUCTURES TO REQUIRED ELEVATIONS AND UNIFORMLY ALONG THE FULL LENGTH OF EACH STRUCTURE. 6. COMPACT SOIL MATERIALS TO NOT LESS THAN 95 PERCENT OF MAXIMUM DRY UNIT WEIGHT ACCORDING TO ASTM D 698. tn DUKE ENERGY NOT TO SCALE CAROLINAS DRAWN BY: J. CHASTAIN DATE: 12/9/2019 REVISED BY: DATE: - CHECKED BY: J. CLEMMER DATE: 12/9/2019 APPROVED BY: J. CLEMMER DATE: 12/9/2019 l0p PROJECT MANAGER: A. ALBERT synTero www.synterracorp.com NOT FOR CONSTRUCTION FIGURE 6-25e REMEDIAL ALTERNATIVE 3 CONCEPTUAL TRENCH DETAIL REMEDIATION BY EXTRACTION COMBINED WITH CLEAN WATER INFILTRATION AND TREATMENT CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA BASE FLOOD LEVEL DAN RIVER r. 91 L A INTAKE BOX PUMP HOUSE a m NOT FOR CONSTRUCTION DUKE NOT TO SCALE FIGURE 6-25f tnENERGY REMEDIAL ALTERNATIVE 3 DAN RIVER WATER INTAKE SCHEMATIC CAROLINAS DRAWN BY: J.cHASTAIN DATE:12/9/2019 REMEDIATION BY EXTRACTION COMBINED WITH REVISED BY: DATE: - REV CHECKED BY: J.cLEMMER DATE:12/9/2019 CLEAN WATER INFILTRATION AND TREATMENT l0p PoNEAABDATE:12/9/2019RO MAAGR CORRECTIVE ACTION PLAN UPDATE ERT — BELEWS CREEK STEAM STATION synTero www.synterracorp.com BELEWS CREEK, NORTH CAROLINA MODEL TIMEFRAME: 4 STARTUP AND OPE �L. -7"4- MIM �] ❑ BORON CONCENTRATION RANGE (>4,000 Ng/L) LANDFILL BOUNDARY (CLOSED) NO WASTE BOUNDARY SHOWN FOR MODEL TIMEFRAMES 12 AND 36 YEARSAFTER SYSTEM STARTUP AND OPERATION DUE TO COMPLETION O BORON CONCENTRATION RANGE (700 - 4,000 Ng/L) STRUCTURAL FILL BOUNDARY (CLOSED) OF ASH BASIN CLOSURE. FUTURE WASTE BOUNDARY WILL BE DETERMINED BY THE SELECTED CLOSURE OPTION. EXISTING EXTRACTION WELL DUKE ENERGY CAROLINAS BELEWS CREEK THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED PROPOSED EXTRACTION WELL PLANT SITE BOUNDARY FROM AMEC FOSTER W HEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT FOR BELEWS CREEK STEAM STATION DATED JULY 2, 2015. PROPOSED CLEAN WATER INFILTRATION WELL LINED RETENTION BASIN ALL BOUNDARIES ARE APPROXIMATE. PROPOSED INFILTRATION HORIZONTAL WELL COAL PILE STORAGE AREA PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. ASH BASIN WASTE BOUNDARY • ASH BASIN COMPLIANCE BOUNDARY STREAM (AMEC NRTR) ® WETLAND (AMEC NRTR) AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON JUNE 11, 2019. AERIAL WAS COLLECTED ON FEBRUARY 3, 2019. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM FIPS 3200 (NADB3). • LANDFILL COMPLIANCE BOUNDARY MODEL TIMEFRAME: APPROXIMATELY 13 YEARS AFTER r' ■' SYSTEM STARTUP AND OPERATION r as (' DUKE 600 GRAPHIC SC 600 1,200 f' ENERGY® CAROLINAS (IN FEET) DRAWN BY: C. WYATT DATE: 11/23/2019 REVISED BY: C. WYATT DATE: 11/25/2019 CHECKED BY: A. ALBERT DATE: 11/25/2019 APPROVED BY: A. ALBERT DATE: 11/25/2019 PROJECT MANAGER: A. ALBERT MODEL TIMEFRAME: APPROXIMATELY 36 YEARS AFTER SYSTEM STARTUP AND OPERATION P:;= C, FIGURE 6-25g REMEDIAL ALTERNATIVE 3 GROUNDWATER REMEDIATION BY CLEAN WATER INFILTRATION AND EXTRACTION TERM SIMULATED BORON CONCENTRATIONS IN ALL FLOW ZONES CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA INTAKE PUMP AND SCREEN 0 0 DAN RIVER __DCQ. Not to Scale EQ TANK EQ TANK I SODIUM HYPOCHLORITE FEED POLYMER FEED I I I I I I I I POLYMER FEED RAPID SEDIMENTATION FILTRATION MIX BASIN RAPID SEDIMENTATION FILTRATION MIX BASIN SODIUM HYPOCHLORITE FEED I I V I I I I I DRAIN AND SOLIDS REMOVAL 9 IE I I FILTRATE TO WWTP 0 0 i PRESSURE GAUGE AND SHUTOFF VALVE AT EACH WELL HEAD CLEAN WATER INFILTRATION WELLS I DECHLORINATION —+ I I I GRAVITY FEED NOTE: PUMP AS NEEDED LEGEND ~ ® Rotameter DUKE tENERGY DRAWN BY: T. COLTON DATE: 11/17/2019 REVISED BY: B. GREEN FIGURE 6-26 CONCEPTUAL PROCESS FLOW DIAGRAM HH - High high E3:�D Flow totalizer Check valve CCQ Ball valve, normal) o y en p CAROLINAS CHECKED BY: A. ALBERT CLEAN WATER INFILTRATION SYSTEM H - High low L — Low Q Pressure gauge >V< Three-way valve >< Diaphragm valve, normally open APPROVED BY: A. ALBERT PROJECT MANAGER: A. ALBERT CORRECTIVE ACTION PLAN UPDATE �' TYP -Typical sP Sampling port 00 Ball valve, normally H Diaphragm valve, normally closed SynTerra BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA closed I www.synterracorp.com EXTRACTION WELLS NORTHWEST AREA 0:oQA t >< N EXTRACTION WELLS VICINITY OF TOE DRAIN DISCHARGE TO EXISTING NPDES OUTFALL OR BENEFICIAL REUSE Not to Scale LEVEL CONTROL I HH WET WELL H I L �► TRANSFER GROUNDWATER PUMP TREATMENT LEVEL CONTROL (PROPOSED ASH BASIN DECANTING PHYSICAL CHEMICAL TREATMENT PLANT) HH EXTRACTION H COLLECTION TANK TRANSFER PUMP EXISTING SAMPLE PORT EXISTING SEEPS EXISTING EFFLUENT FROM LINED RETENTION BASIN EXISTING TOE DRAIN COLLECTION SYSTEM LEGEND ~ ® Rotameter DUKE tENERGY DRAWN BY: T. COLTON DATE: 11/17/2019 REVISED BY: B. GREEN FIGURE 6-27 CONCEPTUAL PROCESS FLOW DIAGRAM HH - High high E01 Flow totalizer Check valve CCQ Ball valve, normal) o y en p CAROLINAS CHECKED BY: A. ALBERT GROUNDWATER EXTRACTON SYSTEM H - High low L — Low Q Pressure gauge >V< Three-way valve >< Diaphragm valve, normally open APPROVED BY: A. ALBERT PROJECT MANAGER: A. ALBERT CORRECTIVE ACTION PLAN UPDATE �' TYP -Typical sP Sampling port 00 Ball valve, normally H Diaphragm valve, normally closed SynTerra BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA closed I r www.synterracorp.com I COAGULANT I CAUSTIC I EXTRACTED GROUNDWASTATIC MIXER >_ (k x CD TER xx Da FLOW CONTROL BLEACH ACID ASH BASIN DECANT WATER Not to Scale STATIC MIXER SKIDDED CLARIFIER COMAG SERVICE go WATER TANK TREATED WATER TANK SODIUM BISULFATE STATIC MIXER I DISCHARGE NOTE: TREATMENT SYSTEM PROCESS FLOW BASED ON DESIGN BY EVOQUA LEGEND ® Rotameter DUKE tENERGY DRAWN BY: T. COLTON DATE: 11/17/2019 REVISED BY: B. GREEN FIGURE 6-28 CONCEPTUAL PROCESS FLOW DIAGRAM HH - High high E3:�D Flow totalizer Check valve CCQ Ball valve, normal) open y p CAROLINAS CHECKED BY: A. ALBERT GROUNDWATER TREATMENT SYSTEM H - High low L — Low (� 7 Pressure gauge >V< Three-way valve >< Diaphragm valve, normally open APPROVED BY: A. ALBERT PROJECT MANAGER: A. ALBERT CORRECTIVE ACTION PLAN UPDATE TYP - Typical sP Sampling port NI Ball valve, normally 1 H Diaphragm valve, normally closed 0 synTerra BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA closed I r www.synterracorp.com Days 0 150 300 450 600 750 900 1050 1200 1350 Submit CAP to NCDEQ (1 day) NCDEQ Review and Comment Period (90 days)** Duke Energy Responds to CAP Comments (60 days) CAP Approved by NCDEQ (1 day) Implement Effectiveness Monitoring Plan (30 days)* Submit Pilot Test Work Plan and Associated Permit Applications to NCDEQ (30 days)* , Implement Quarterly Progress Reporting to NCDEQ (30 days) Permit Applications Approved by NCDEQ (60 days)** Conduct Pilot Test (182 days) Submit Detailed Design and Specifications Report (182 days) Review Design Report with NCDEQ (1 day) Bid documents, Procurement, Permitting (182 days) Installation of Full -Scale Groundwater Remediation System (243 days) System Start -Up and Optimization (90 days) Submit As -Built Construction and Start -Up Information Report (90 days) Ongoing System Operation and Reporting Notes: - Either submittal of the Effectiveness Monitoring Plan DUKE 4S or the pilot test work plan and permit applications (as ENERGY applicable) will fulfill section G.S.130A-309.209.(b)(3). CAROLINAS " - Actual time may vary due to a variety of factors �� including agency review and approvals, weather delays, equipment availability, etc. synTerra DRAWN BY: R. ISHAM DATE: 12/5/2019 REVISED BY: CHECKED BY: S. WOOD APPROVED BY: PROJECT MANAGER: A. ALBERT www.synterracorp.com n u FIGURE 6-29 CAP IMPLEMENTATION GANTT CHART CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA I a�. .l lo I 1 . 2 . , pp ^s I / OGkF figy i %% rod 40 . •�' ' L LEGEND I OPO � RP�VR NOTES. L BG-7SID, BG-2SIDIBRA,BG-3SID,MW-200SIDIBR GRAPHIC SCALE DUKE 400 0 aoo aoo FIGURE 6-30 i ENERGY (IN FEET) EFFECTIVENESS MONITORING WELL '+S NETWORK AND FLOW PATHS DRAWN BY: C. WYATT DATE: 12/9/2019 CORRECTIVE ACTION PLAN UPDATE REVISED BY: C. WYATT DATE: 12/119/2019 CHECKED BY: A. ALBERT DATE: 12/19/2019 BELEWS CREEK STEAM STATION APPROVED BY: A. ALBERT DATE: 12/19/2019 synTerra PROJECT MANAGER: A. ALBERT BELEWS CREEK, NORTH CAROLINA www.synterracorp.com Interim Monitoring Plan Corrective Action (IMP) sampling Plan Approval Effectiveness Monitoring Plan (EMP) monitor downgradient, sidegradient, and background groundwater in accordance with G.S. 130A- 309.214(a)(4)k for compliance with NCAC 02L .0202 Groundwater Quality applicable Standards Based on annual evaluation, is the remedial system performance \ effective? / No Adjust remedial system components; continue with EMP or Implement contingency plan in accordance with CAP Update Section 6.8.8; continue with EMP Yes No Continue EMP sampling and Continue PCMP sampling Annual Review and and Annual Review and Reporting I I Reporting / Post -Closure Monitoring Plan (PCMP) Post -closure monitoring to begin Is the ash basin Yes following closure certification. certified closed? Monitoring parameters and locations to be determined at that time and in accordance with G.S. 130A- 309.214(a)(4)k.2. No Are the groundwater Based on monitoring results Yes annual evaluation, below applicable is the plume stable standards at the at the compliance compliance boundary boundary? for three years? DUKE ENERGY. Notes: CAROLS NCAC - North Carolina Administrative Code 02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and �� Standards synTerra Yes Request completion of active remediation or Request completion of PCMP post -closure monitoring in accordance with G.S. 130A-309.214(a)(3)b DRAWN BY: T. PLATING DATE: 10/112019 REVISED BY: K SHECK DATE: 10/16/2019 CHECKED BY: A. ALBERT DATE: 12/16/2019 APPROVED BY: A. ALBERT DATE: 12/18/2019 PROJECT MANAGER: A. ALBERT www.synterracorp.com FIGURE 6-31 No EFFECTIVENESS MONITORING PLAN WORK FLOW AND OPTIMIZATION FLOW DIAGRAM CORRECTIVE ACTION PLAN UPDATE BELEWS CREEK STEAM STATION BELEWS CREEK, NORTH CAROLINA Submit Request for Termination Request shall include: • Discuss duration and cost for continuation • Evaluate success of CAP • Evaluate alternate technologies • Discuss health an safety impacts if constituent levels remain Demonstrate • Continuation of CAP will Implement GW not result in significant monitoring plan at reduction of constituents Has the site Termination location of no less • Constituents have not and been identified authorized after health than one year' will not migrate onto for resource and safety predicted time o adjacent properties development? analysis travel upgradient of • GW discharge to surface any existing or water will not violate 02B foreseeable receptor standards • Public notice of the request per Rule 0.0114 (b) • Proposed termination is consistent with all other environmental laws Is there .. sufficient . evidence that concentrations are less than 02L standards from multiple sampling events? No further action