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Home My WebLink AboutNC0001422_02_CAP Update 2020_Figures (1 of 2)_20200814Corrective Action Plan Update August 2020 L.V. Sutton Energy Complex FIGURES SynTerra • ♦. BUTTON PLANT / PARCEL LINE ♦ r• r I ♦ ♦ I ♦ ♦ COMPLIANCE I BOUNDARY ` FORMER ASH BASIN �♦� � LANDFILL WASTE • WASTE BOUNDARY • ♦ BOUNDARY • Lake Sutton • • FORMER 1984 44 • ASH BASIN • I • EXCAVATED1971 • ♦♦ 'r r �. � � ASH BASIN �s � FORMER PROCESS AREA ♦r ♦, FORMER ASH DISPOSAL \ • /AREA WASTE BOUNDARY l•• SOURCE: 2019 USGS TOPOGRAPHIC MAP, CASTLE HAYNE AND LELAND QUADRANGLES, OBTAINED FROM THE USGS STORE AT https://store.usgs.gov/map-locator. FORMER COAL PILE AREA WASTE BOUNDARY � L EFFLUENT DISCHARGE CANAL I I POWER PLANT L__J DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). %� DUKE ENERGY w(NsroN-saLEror FIGURE ES-1 SITE LOCATION MAP CORRECTIVE ACTION PLAN UPDATE PROGRESSCHARLOTTE rNEW L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA DRAWN BY:J.NIRTz DATE:11/18/201scRAPHIcscALE REVISED BY: C. CURRIER DATE: 07/22/2020 000 0 000 000 CHECKED BYT DATE: 07/22/2020 synTerra B. APPROVED BY: B. WYLIE DATE: 07/22/2020 WYLIEN PROJECT MANAGER: B. WYLIE (IN FEET) www.svnterracorD.com A: ``s • k AREA 1 B • j 1984 ASH BASIN (LIN 1071 AREA 2 1983 r crrcuc�nu .. I Gr_GAIn NPDES OUTFALL LOCATION EXTRACTION WELL • SUPPLY WELLS GROUNDWATER FLOW DIRECTION SURFACE WATER FLOW DIRECTION EFFLUENT DISCHARGE CANAL - ASH BASIN COMPLIANCE BOUNDARY ANTICIPATED EFFLUENT CANAL EXTENSION ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY _ DUKE ENERGY PROGRESS PROPERTY LINE AREAS 1A/1 B/4 - CONFIRMATION GROUNDWATER MONITORING AREAS 2/3A- ONGOING CLOSURE ACTIVITIES AREA 3B - MNA REMEDY NOTES: 1. THE OUTLINE OF AREAS 1 THROUGH 4 REPRESENT THE AREAS WHERE THE MAXIMUM EXTENT OF COIS ARE GREATER THAN COMPARISON CRITERIA IN GROUNDWATER ASSOCIATED WITH THE SUTTON SOURCE AREAS. 2. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 3. ALL BOUNDARIES ARE APPROXIMATE. 4. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). (' DUKE ENERGY PROGRESS 1 AREA 1A � 0 AREA 3B GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 10/07/2019 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: T. HARTMAN DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE • FIGURE ES-2 • • 7 AREAS PROPOSED FOR CORRECTIVE ACTION CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA ♦ ♦. BUTTON PLANT / PARCEL LINE ♦ • , r• r I ♦ r r I ♦ COMPLIANCE I BOUNDARY ` FORMER ASH BASIN �♦� •� ` LANDFILL WASTE r WASTE BOUNDARY` • ♦ BOUNDARY rr � � 1 • r I Lake Sutton • FORMER 1984 ASH BASIN ft r I ; ♦ ♦ . �� • EXCAVATED 1971 FORMER PROCESS AREA ♦`� � � � • ` ASH BASIN lk • " ♦r r r ♦, FORMER ASH DISPOSAL ` •� AREA WASTE BOUNDARY FORMER COAL PILE AREA' 1 WASTE BOUNDARY i L 'EFFLUENT DISCHARGE CANAL t` r • I I POWER PLANT s� INTAKE CANAL SOURCE: •, 2019 USGS TOPOGRAPHIC MAP, CASTLE HAYNE AND LELAND QUADRANGLES, OBTAINED FROM THE USGS STORE AT https://store.usgs.gov/map-locator. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011).-� DUKE t�ENERGY wiNsroN-sa�Eror FIGURE 1-1 SITE LOCATION MAP CORRECTIVE ACTION PLAN UPDATE PROGRESS CHARLOTTE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA NEW HANOVER COUNTY DRAWN BY: J. NIRTz DATE: 11/18/2019 REVISED BY: C. CURRIER DATE: 07/22/2020 cRAPHIc SCALE 000 0 000 000 CHECKED BY T. N DATE: 07/22/2020 s)mTerra B. APPROVED BY: B. WYLIE DATE: 07/22/2020 WYLIE PROJECT MANAGER: B. WYLIE (IN FEET) www.svnterracorD.com \\ MID 6 andin8_ FUTURE LANDFILL 0i� �� J WASTE BOUNDARY ;', 1�� ,,.. � per/ art ,. � �� __�� -� !� • � II ;1;�•• _ FUTURE COMPLIANCE BOUNDARY s rFUTURE ASH BASIN WASTE BOUNDARY - p 7-4. i r FUTURE ` k �V C1. �. • I i I COOLING a POND .• ,Ai- FUTURE 1984 ASH BASIN \�, FUTURE PROCESS AREA / -0 - �\\ I� FUTURE ASH DISPOSAL Cree -- FUTURE 1971 ASH BASIN AREA WASTE BOUNDARY Nes'6 ,29 - �ll C ar—Hill FUTURE COAL PILE �0 WASTE BOUNDARY r /01 FUTURE DUKE ENERGY PROGRESS PROPERTY LINE cl NEW - — 1 m I 28 +&�r� Cam.. COAST M£ BRI"�F . �a I �l •��' I` R ;I •s1 • BM 6 28 !, -PTO Ourn I �_ , SOURCE: USGS TOPOGRAPHIC MAPS (1944,1947,1948, &1954) OBTAINED FROM THE NRCS GEOSPATIAL DATA GATEWAY AT http://datagateway.nres.usda.gov/ \ - GRAPHIC SCALE c4*)DUKE 2000 0 2000 4000 ENERGY IN FEET PROGRESS DRAWN BY: J. CHASTAIN DATE: 7/30/2015 REVISED BY: C. NEWELL DATE: 5/22/2019 CHECKED BY: T.HARTMAN DATE:6/15/2020 APPROVED BY: B. WYLIE DATE: 6/15/2020 141P PROJECT MANAGER: B. WYLIE R t � 1 WI uddy l I L7 r (LI, S. CUS SE NION; ATION FIGURE 1-2 HISTORICAL USGS TOPOGRAPHIC MAP CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA www.synterracorp.com / MW-41B - MW-41C -- MW-41D MW-08B --/ MW-41E ♦ MW-08D MW-8E ♦ MW-8 M W-5A MW-5B MW-5C MW-5CD MW-5D MW-5E MW-5RE ♦ LEGEND EXTRACTION WELL WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE lie WELL IN UPPER PEEDEE FLOW ZONE lie WELL IN LOWER PEEDEE FLOW ZONE ABANDONED WELL PIEZOMETER IN UPPER SURFICIAL FLOW ZONE • PIEZOMETER IN UPPER PEEDEE FLOW ZONE ABANDONED PIEZOMETER WATER SUPPLY WELL NPDES OUTFALL LOCATION ASH BASIN WASTE BOUNDARY - ASH BASIN COMPLIANCE BOUNDARY ONSITE LANDFILL BOUNDARY ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL NOTES 1. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM. 4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS 5. ALL BOUNDARIES ARE APPROXIMATE. 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). 97 •, je O GWPZ-1A ♦/ GWPZ-16 4 GWPZ-2A c ' GWPZ-2 B M W-34 M W-34 1983 MW-48B M�v J FPA-3B MW-48C FPA-3C ABMW-2S / 4WW447B TW-L098 • MW-45B TW-L 15D MW-15 MW-15RB MW-15RC MW-45C MW-15RD MW-46B MW-45D MW-20 MW-46D MW-20D MW-50B M W-20 P D M W-50C MW-44B MW-43C MW-44C MW-43B OUTFALL 001 I • A FPA-4B 0 AW-5C �v J AW-5D SMW-3B ♦ SMW-3C MW-19 MW-28B MW-32C MW-33C • MW-28C MW-28T 16 M W 7 B ` t; '. D MW-7C AW-913 AW-9C i �� ' • ."� ' �� . AW-9D .. . GRAPHIC SCALE DUKE tENERGY 600 0 6aa 1,200 (IN FEET) DRAWN BY: J. KIRTZ DATE: 05/21/2019 PROGRESS REVISED BY: J. KIRTZ DATE: 06/15/2020 CHECKED BY: T. HARTMAN DATE: 06/15/2020 APPROVED BY: B. WYLIE DATE: 06/15/2020 synTeria PROJECT MANAGER: B. WYLIE www.synterracorp.com MW-37B MW-37C MW-37D ` 6 MW-37CD MW-37E • L PZ-23D `� FIGURE 1-3 SITE LAYOUT WITH MONITORING WELL LOCATIONS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA MW-8/B/D/E A i W-41 B/C/D/E a 40 PZ-10S/D • MW- I, MW-38B/C/D MW-36B/C CCR-208C/D `MW 11 41vSMW-4B/C MW-27B/C }R�� CCR-201C/D DMW-1 • CCR-115B/C/D BMW-1 GWPZ-1A/B � MW-40'B/C/D l O MW-35B/, 0 AW-2B/C/D CCR-116B/C CCR-207C/D ` AW-3B/C CR-114B/C/DJQ� GWPZ-2A/B DMW 2 ♦ BMW-3 MW-34B/C CCR-202C/D CCR-117B/C • R-113B/C/D �� MW-31RB/RC ITFALL 004 A CCR-118B/C CCR-206C/D AW-7RD wlllSMW-5B/C R-112B/C/D BMW-2 5.: _ CCR-119B/C ® MW-246/C ® MW-24RB/RClii • CCR-203C/D 11 B/C/D • DMW-3 ® GWPZ 3A/3B PZ-INT 0 � BMW-4 • SMW-6B/C/D CCR-120B/C CCR-205C/D • DMW-4 , CCR-110B/C/D ® CCR-204C/D CCR-121 RB/RC CCR-121 B/C •' ate.. • MW-12R CCR-109B/C/D ® TW-202 CCR-122RB/RC CCR-122B/C �AW-6RB/RD/RE r CCR-108RB/RC/RD SMW-1 B/C e CCR-108B/C/D GW Z-4A/B • MW-23B/C/D/E -- AC�CR-�123B/COU00TW-132 MW-IAP-1 D CCR-107RB/RC/RD B/RC _ AW-4B/C CCR-1076/C/D PZ-1971 vu L CCR-124RB/RC MW-42B/C/D SMW-2B/C • OUTFACE 008 CCR-1066/C/D CCR-1056/C/D 1983 8 MW-22B/C EXTENSIO FPA-96/C FPA-2B/2C FPA-4B/C AW-5B/C/D/E MVITA 3R/D CCR-103B/C/D �� MW-19 MW 32C ` SMW-3B/C •SMW-49B/C MW-21C � �MW-33C � COOLING POND CCR-102B/C FPA-3B/C • ABMW-2S/D TW-L098 d- ®MW-28B/C/T • '-.k AB-2 MW-47B/C MW-48B/C MW-14 ' ' FORMERAS TW-L024A DISPOSAL MW-16/D MW ®MW-7A/B/C MW-15RB/RC/RD �. �00 LEGEND MONITORING WELL LOCATIONIN OUTFACE 001 �� ABANDONED WELL LOCATION I •``' C PIEZOMETER LOCATION WATER SUPPLY WELL LOCATION NPDES OUTFALL LOCATION - ASH BASIN WASTE BOUNDARY _ . ASH BASIN COMPLIANCE BOUNDARY ONSITE LANDFILL BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY . DUKE ENERGY PROGRESS PROPERTY LINE NOTES: 1. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM GRAPHIC SCALE 4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY I'DUKE 490 0 490 980 FIGURE 1-4 PROGRESS. ENERGY (IN FEET) SIMPLIFIED SITE LAYOUT MAP 5. ALL BOUNDARIES ARE APPROXIMATE. PROGRESS DRAWN BY: J.KIRTZ DATE:11/18/2019 CORRECTIVE ACTION PLAN UPDATE 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. REVISED BY: J. KIRTZ DATE: 06/15/2020 L.V. SUTTON ENERGY COMPLEX CHECKEDBY:1 ARTMAN DATE:06/15/2020 7. DRAWING HAS BEEN SET WITH A PROJECTION OF APPROVED BY: B.WYLIE DATE:06/15/2020 WILMINGTON, NORTH CAROLINA NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). Terra PROJECT MANAGER: B. www.synterraterracorp.com LEGEND NOTES: (' DUKE ENERGY PROGRESS : 'a ,flL III 4M.71'�-' Kv GRAPHIC SCALE 375 0 375 750 (IN FEET) DRAWN BY: C. WYATT DATE: 03/30/2020 REVISED BY: C. CURRIER DATE: 07/22/2020 CHECKED BY: T. HARTMAN DATE: 07/22/2020 APPROVED BY: B. WYLIE DATE: 07/22/2020 PROJECT MANAGER: B. WYLIE NIL" by �. FIGURE 2-1 MAP OF CCR AND FORMER COAL PILE MANAGEMENT AREAS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 0 ^ J� z 0 Q > 0 W J W 1 A - (WEST) i COOLING POND W.L.ELEV. B_10_ L. V. SUTTON ENERGY COMPLEX CCR SURFACE IMPOUNDMENT LIMIT OF POND BASED 1 00 U cl C9 00 00 0 K 00 N m -i i w � FORMER -_ m ¢ 0-- ASH L) SURFACE U c� U % EXCAVATED L-_-�_ AREA — — — DREDGED AREA ll� AREA -LINED n in m > N Q U o U 0 J W a SALINE AQUIFER CONDITIONS IN THE �— LOWER PEEDEE FORMATION UPPER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS --------------------------------------------------------------------- LOWER PEEDEE FORMATION i ZONES OF SILTS AND FINE SANDS LEGEND - A' (EAST) 100 50 ^ 4f z 0 Q 0 > W J W -50 -100 MW 23B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER NOTES MW 23C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION MW-23D WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. WELL WATER LEVEL ELEVATION MW-23E WELL IN LOWER PEEDEE FLOW ZONE 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). V UPPER PEEDEE FLOW ZONE GROUNDWATER ABMW 5S WELL ABANDONED WELL WATER LEVEL ELEVATION 3. ALL BOUNDARIES ARE APPROXIMATE. SUT EW 5 EXTRACTION WELL IN LOWER SURFICIAL FLOW ZONE V LOWER PEEDEE FLOW ZONE GROUNDWATER S 12 WATER SUPPLY WELL WELL WATER LEVEL ELEVATION 11.98' WATER LEVEL ELEVATION (NAVD 88) . _ GENERALIZED WATER TABLE LABEL COLORING BY FLOW ZONE ( ) _P, GENERALIZED GROUNDWATER � WELL SCREEN FLOW DIRECTION ASH BASIN COMPLIANCE BOUNDARY O SURFACE WATER LOWER SURFICIAL DUKE 0 125 250 500 NM NOT MEASURED ' CAICDr'V HORIZONTAL SCALE: 1" = 500' VERTICAL SCALE: 1 " = 100' FIGURE 2-2 CROSS SECTION LOCATION m z OO w w Qli B---a (NORTH) 1984 ASH BASIN (LINED) COMPLIANCE BOUNDARY 1971 ASH BASIN FORMER B' (SOUTH) - PROCESS - 1984 ASH BASIN m U p AREA(FPA) (2006INTERIOR Q a �oCONTAINMENT O m oLo AREA) N Orn 1:15 rn � Nco 0I 0 Lu Jm ¢ U U U LL d a d � U � � m °0 c� 0 � 0 � � GRAVEL m � FORMERASH� SURFACE > � � � � FORMER ASH SURFACE m � Q UUU UUU /ROAD FORMER ASH / SURFACE O 16- CLAY LINER —CLAY — LINER _ — 7 ------ ----------- -- I NM 969.34' 8.91 ---------------- -'SATURATEDSOIL_____ _ ------ ---- -----DREDGED ------ ----8.64' ---- 8.41' 8.46' -----------------9.62' ---- AREA --------- 9.6 8.99 ------------------- ------ --- - --------------- - --------- ®.33' 8.45, 8.67' ------------------ ----- LOWER SURFICIAL ZONE WITH COARSE -------------------- 9.37' ----------------------------- 8.79 UPPER PEEDEE FORMATION ------------------- --------- --- ---- ---------------------------------------------- SANDS AND SILT 9.68' ZONES OF SILTS AND FINE SANDS LOWER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS SALINE AQUIFER CONDITIONS � SALINE AQUIFER CONDITIONS IN THE PEEDEE FORMATION LOWER PEEDEE FORMATION IN THE PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LEGEND MW 41B WELL IN UPPER SURFICIAL FLOW ZONE MW 41C WELL IN LOWER SURFICIAL FLOW ZONE MW 41D WELL IN UPPER PEEDEE FLOW ZONE MW 41E WELL IN LOWER PEEDEE FLOW ZONE ABMW 1S WELL ABANDONED - - GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL SATURATED SOIL NM NOT MEASURED UPPER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION V UPPER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION V LOWER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION 9 37' WATER LEVEL ELEVATION (NAVD 88) (LABEL COLORING BY FLOW ZONE) WELL SCREEN ASH BASIN COMPLIANCE BOUNDARY LOWER SURFICIAL ZONE WITH COARSE SANDS AND SILT 100 50 z 0 O Q w w -50 -100 -150 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. CROSS SECTION LOCATION CFORMER COAL FORMER ASH DISPOSAL AREA PILE AREA (NORTH) (FADA) (FCPA) o FORMER w O 00 ASH EXTENT Q� 11 100 D N NCN CO U 0] J cnw o�� o J � co ¢ ¢ H 50 w J J Z U w 0 Q 6.13' 4.5U w J w 6.18' 4.57' -50 UPPER SURFICIAL \ ZONE WITH SILTS & / SANDS UPPER PEEDEE FORMATION 'LOWER SURFICIAL ZONES OF SILTS AND FINE SANDS 5 82' ZONE WITH COURSE -100 SANDS & SILT LOWER PEEDEE FORMATION -150 1 ZONES OF SILTS AND FINE SANDS LEGEND MW 46B WELL IN UPPER SURFICIAL FLOW ZONE MW 46C WELL IN LOWER SURFICIAL FLOW ZONE MW 46D WELL IN UPPER PEEDEE FLOW ZONE ABMW 2S WELL ABANDONED GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL PEEDEE FLOW ZONE 0 (PEEDEE FORMATION) UPPER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION UPPER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION 4.57' WATER LEVEL ELEVATION (NAVD 88) (LABEL COLORING BY FLOW ZONE) WELL SCREEN ASH BASIN COMPLIANCE BOUNDARY _ co (SOUTH) 100 50 Z 0 O Q w w -50 -100 -150 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. CROSS SECTION LOCATION D-no (SOUTHWEST) — D' FORMERASH (NORTHEAST) DISPOSAL AREA (FADA) 0 J C6 W O ZII 0 C6 100 p U m CaJ > p a U p m a p ¢ 11 100 > �n I.C) UJ J O O O O O O Lo Lo Lo co (D => Y W N N N Of —> .--I r>-I .-I c-I rl U J 11 H J 2i > > 2i 1 W Q Z F J 50 LL w i w 50 ww ¢ J LL O 0 — — — —5.49' 6.85' �6.13' 7.29' 9.48' 0 O J 5.34' �� w w 50 6.79' 6.18' 7.28' \ 9.37' 50 w UPPER SURFICIAL ZONE UPPER WITH SILTS & SANDS PEEDEE 5.55' 5 82' 7.20' � UPPER PEEDEE FORMATION 5.50' ZONES OF SILTS AND FINE SANDS -100 LOWER SURFICIAL_ _ _ _ 100 ZONE WITH COURSE SANDS &SILT LOWER PEEDEE FORMATION -150 ZONES OF SILTS AND FINE SANDS -150 LEGEND MW 46B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER NOTES MW 46C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. MW 15RD WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, GENERALIZED WATER TABLE UPPER PEEDEE FLOW ZONE GROUNDWATER (NAVD 88). GENERALIZED GROUNDWATER WELL WATER LEVEL ELEVATION 3. ALL BOUNDARIES ARE APPROXIMATE. FLOW DIRECTION 6.18 WATER LEVEL ELEVATION (NAVD 88) SURFACE WATER (LABEL COLORING BY FLOW ZONE) LOWER SURFICIAL WELL SCREEN PEEDEE FLOW ZONE ASH BASIN COMPLIANCE BOUNDARY 0 (PEEDEE FORMATION) CROSS SECTION LOCATION Corrective Action Plan Update August 2020 L.V. Sutton Energy Complex SynTerra Figure 4-1 Water Level Map — Surficial Flow Zone — February 26 & 27, 2020 Provided in separate electronic figure file as a large sheet size ►E i AW-04C Well Cluster 12 11 10 9 8 7 6 1 /1 /2015 1 /1 /2016 1/11/2017 1 /1 /2018 1 /1 /2019 1 /1 /2020 Date AW-04B (Upper Surficial Flow Zone Well — Near Extraction System) AW-04C (Lower Surficial Flow Zone Well — Near Extraction System) 13 00 00 C 12 Q z 11 C O_ '' 10 R > 07 W 9 07 > 0) J L 8 M AW-5C Well Cluster �i i MW-12R Well Cluster 13 I 12 11 I 10 I 9 I 8 I 7 1/1/2015 1/1/2016 1/1/2017 Date/1/2018 1/1/2019 1/1/2020 MW-112R (Lower Surficial Flow Zone Well — Near Extraction System) AW-6RD (Upper Peedee Flow Zone Well — Near Extraction System) 1 /1 /2015 1 /1 /2016 1/1/2017 1 /1 /2018 1 /1 /2019 1 /1 /2020 Date AW-5C (Lower Surficial Flow Zone Well — Near Extraction System) AW-5D (Upper Peedee Flow Zone Well — Near Extraction System) LEGEND Notes: DUKE DRAWN BY: D.AVARD DATE:02/03/2020 FIGURE 4-2a NAVD 88 - North American Vertical Datum 1988 ENERGY REVISED BY: D.AVARD DATE:05/05/2020 HYDROGRAPHS -EASTERN PROPERTY LINE Start of Excavation of 1971/1984 Ash Basins - January 2016 — — — Initial Ash Placement in CCP Landfill - July 7, 2017 in - inches PROGRESS CHECKED BY: T. HARTMAN DATE:05/07/2020 CORRECTIVE ACTION PLAN UPDATE Extraction System Online - August 9, 2017 Upper Surficial Flow Zone APPROVED BY: L. DRAGO DATE:05/07/2020 L.V. BUTTON ENERGY COMPLEX — — — Hurricane Florence Landfall - September 14, 2018 Lower Surficial Flow Zonetip UpperPeedeeFlowZone PROJECT MANAGER: B. WYLIE WILMINGTON, NORTH CAROLINA Terra synwww.synterracorp.com Historical Southeast Flow Transect — 1971 Ash Basin and FPA November 2015 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 Distance From ABMW-01S (feet) 1971 Ash Basin Southeast Waste Boundary 1971 Ash Basin Southeast Compliance Boundary Water Level (NAVD 88) Notes: Water levels collected during sampling — November 2015 FPA — Former Process Area NAVD 88 — North American Vertical Datum 1988 Inset image is a portion of Figure 1-3 DUKE DRAWN BY: D. AVARD ENERGY REVISED BY: B.WYLIE PROGRESS CHECKED BY: T. HARTMAN APPROVED BY: L. DRAGO l' PROJECT MANAGER: B. WYLIE 1971 f984 ASH ASHBABASIN BASIN (LINED) sur-Ew-3 '� f983 ,�I��hJ��S s - EXTENSION!�� $UT-EW-2 SUT-EW-1 FORAIERASH {� DISPOSAL A17EA, I ! FORA ER Nr PROCESS 4REA FORINER � •�� COAL PfLE '•I - •i DATE: 02/03/2020 DATE: 05/05/2020 DATE: 05/07/2020 DATE: 05/07/2020 syrilerra www.synterracorp.com Historical Groundwater Flow Direction (Southeast) FIGURE 4-2b HISTORICAL HYDROGRAPH 1971 ASH BASIN AND FPA CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA M111111 00 9.75 00 C Q 9.50 Z c 9.25 .41 fC 9.00 W 8.75 J L 8.50 3 8.25 8.00 Historical North Flow Transect — 1984 Ash Basin September 2015 I I GWPZ-1 B I MW-27C MW-36C MW-10 I I I I I I 0 200 400 600 800 1000 Distance From GWPZ-113 (feet) 1984 Ash Basin North Waste Boundary 1984 Ash Basin North Compliance Boundary Water Level (NAVD 88) Notes: DUKE DRAWN BY: D. AVARD DATE: 02/03/2020 Water levels collected during sampling — September 2015 ENERGY REVISED BY: B. WYLIE DATE: 05/05/2020 NAVD 88 — North American Vertical Datum 1988 PROGRESS CHECKED BY: T. HARTMAN DATE: 05/07/2020 Inset image is a portion of Figure 1-3 // APPROVED BY: L. DRAGO DATE:05/07/2020 11111 PROJECT MANAGER: B. WYLIE synTerra www.synterracorp.com :�z.z to ■■ • MW-27C' MW 36C m ,, ■ • � � GWPZ-1B :� C ■: W OUTFACE 004 ® ♦ a o Historical Groundwater Flow Direction (North/Northeast) FIGURE 4-2c HISTORICAL HYDROGRAPH 1984 ASH BASIN CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 00 co Q Z c 0 4j M _0 W G7 G7 J L M 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 -400 -200 FADA and FCPA February 2020 0 200 400 600 800 1000 1200 1400 1600 1800 Distance From MW-16D (feet) FADA Waste Boundary FCPA Waste Boundary 1971 Ash Basin South Compliance Boundary Water Level (NAVD 88) Y i MW-16D -15RC I, 1♦ 0 M W-43C OUTFALL 001 Groundwater Flow Direction (Southwest) Notes: DUKE tENERGY DRAWN BY: D.AVARD DATE:02/03/2020 FIGURE 4-2d Water levels collected during 24 hour sweep — February 2020 REVISED BY: B. WYLIE DATE:05/05/2020 HYDROGRAPH — FORMER ASH DISPOSAL FADA—Former Ash Disposal Area PROGRESS CHECKED BY: T.HARTMAN DATE:05/07/2020 AREA (FADA) AND FORMER COAL PILE FCPA — Former Coal Pile Area APPROVED BY: L. DRAGO DATE: 05/07/2020 AREA (FCPA) /// NAVD 88 — North American Vertical Datum 1988 PROJECT MANAGER: B. WYLIE CORRECTIVE ACTION PLAN UPDATE Inset image is a portion of Figure 1-3 1111 L.V. SUTTON ENERGY COMPLEX syrlTerla I www.synterracorp.com WILMINGTON, NORTH CAROLINA 6.75 O O � 1 � � O �o �o 1p (N5� O 11 0 5.75 1 4 0.5 e LEGEND 1 GROUNDWATER FLOW DIRECTION HYDRAULIC HEAD (FEET) NPDES OUTFALL LOCATION EXTRACTION WELL LOCATION ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FPABOUNDARY FCPA BOUNDARY EFFLUENT DISCHARGE CANAL ONSITE LANDFILL BOUNDARY ■ DUKE ENERGY PROGRESS PROPERTY LINE NOTES: 1.ARROWS INDICATE APPROXIMATE GROUNDWATER FLOW DIRECTION, NOT MAGNITUDE. 2. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA (FALTA, GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2020). HEAD CONTOURS AND FLOW DIRECTIONS SHOWN FOR MODEL LAYER 8. 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 7. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 8. FPA-FORMER PROCESS AREA 9. FCPA- FORMER COAL PILE AREA X. ♦ i s ' N SUT-EW-9 ♦ r` SUT-EW-8 • •'= SUT-EW-7 • • SUT-EW-S • 1 SUT-EW 4 � Lp � ' ♦ xis` Lo SUT EW 3 •ti SUT-EW-2 - F� S N 7.75 s. 6 4.75 5.5 • 8MOM noun S - o ■• \ amma■■_�♦ S 9.25 •��•■�� OUTFACE 001 • � � � , � ��♦♦Moon ♦ ■ lk 9-(6 s ♦ O T 25 >. l N cS j r' cNn O 4.75 3 (' DUKE 750 GRAPHIC SCALE FIGURE 4-3a 0 750 1,500 ENERGY (IN FEET) SIMULATED GROUNDWATER FLOW DIRECTION PROGRESS DRAWN BY: C.WYATT DATE:03/19/2020 UPPER SURFICIAL FLOW ZONE REVISED BY: R. KIEKHAEFER DATE: 06/24/2020 CURRENT CONDITIONS CHECKED BY:T. HARTMAN DATE: 06/24/2020 CORRECTIVE ACTION PLAN UPDATE APPROVED BY: B. WYLIE DATE: 06/24/2020 L.V. SUTTON ENERGY COMPLEX WnTeaa PROJECT MANAGER: B. WYLIE WILMINGTON, NORTH CAROLINA www.synterracorp.com D LEGEND 1 GROUNDWATER FLOW DIRECTION HYDRAULIC HEAD (FEET) NPDES OUTFALL LOCATION EXTRACTION WELL LOCATION ■ ■ ■ ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FPA BOUNDARY FCPA BOUNDARY EFFLUENT DISCHARGE CANAL ONSITE LANDFILL BOUNDARY ■ ■ DUKE ENERGY PROGRESS PROPERTY LINE NOTES: 1.ARROWS INDICATE APPROXIMATE GROUNDWATER FLOW DIRECTION, NOT MAGNITUDE. 2. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA (FALTA, GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2020). HEAD CONTOURS AND FLOW DIRECTIONS SHOWN FOR MODEL LAYER 12. 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 7. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 8. FPA-FORMER PROCESS AREA 9. FCPA- FORMER COAL PILE AREA 1984 ASH BASIN (LINED) t DUKE IENERGY PROGRESS s)mTena 11 001 91S -,1 s Illlll�irriai mI A R ♦ S r■■■I-■■EVA" IN ■c GRAPHIC SCALE 750 0 750 1,500 (IN FEET) DRAWN BY: C. WYATT DATE: 03/19/2020 REVISED BY: R. KIEKHAEFER DATE: 06/24/2020 CHECKED BY: H. SHARITT DATE: 06/24/2020 APPROVED BY: B. WYLIE DATE: 06/24/2020 PROJECT MANAGER: B. WYLIE • ly O ♦ v 9 9 25 67 \ , • 6.75 FIGURE 4-3b SIMULATED GROUNDWATER FLOW DIRECTION LOWER SURFICIAL FLOW ZONE CURRENT CONDITIONS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA LEGEND SURFACE WATER SAMPLE LOCATION NPDES OUTFALL LOCATION - ■ - ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY FORMER ASH DISPOSAL AREA BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY r DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION NOTES: 1. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATIC SYSTEM 2. W.E. - WATER ELEVATION (APPROXIMATE). 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVE ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). m r ' ♦ ♦ I I %' DUKE ENERGY PROGRESS r a. OUTFALL 002 Ilk 1984 ASH BASIN (LINED M SW_7 asN hL BASIN • 11: (LAKE SUT ON) O/SCyARGF 1983 ,,21 W.E. 8.10_ C 14114 EXTENSICOOLING POND ON A J GRAPHIC SCALE 600 0 600 1,200 (IN FEET) DRAWN BY: J. KIRTZ DATE: 11/15/2019 REVISED BY: J. KIRTZ DATE: 06/15/2020 CHECKED BY: H. SHARITT DATE: 06/15/2020 APPROVED BY: B. WYLIE DATE: 06/15/2020 PROJECT MANAGER: B. WYLIE www.synterracorp.com 001 J • v FIGURE 4-4 POTENTIAL SURFACE WATER RECEPTORS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA li _\ ' \ xcii�" DUKEENERGY L. V. SUTTON ENERGY COMPLEX DW-15 9 PRW-1 LEGEND 0 OFFERED AND/OR SUPPLIED FILTRATION SYSTEM CONNECTED TO MUNICIPAL WATER SUPPLY LINE 9 DW 14 WATER SUPPLY WELL -APPROXIMATE CFPUA WATER LINE - APPROXIMATE DUKE ENERGY PROGRESS PROPERTY LINE — — — — ASH BASIN COMPLIANCE BOUNDARY NEW HANOVER COUNTY PARCEL LINE SOURCES: WATER LINE LOCATED BASED ON INFORMATION SUPPLIED TO SYNTERRA BY (CFPUA) CAPE FEAR PUBLIC UTILITY AUTHORITY ON APRIL 19, 2016. JUNE 14. 2019 AERIAL PHOTOGRAPH FROM GOOGLE EARTH. WIL FERGIE LLC 3881 US HWY 421 N FiIiifddl+►:11:7A] DW75r 5JDW8 �R � DW-10� \TURNERASPHALT\ 221 SUTTON LAKE RD Gy \ EZZELL TRUCKING LLC \ J� 233 SUTTON LAKE RD \ R FLEMINGTON WATER TANK o° BETWEEN THE ` 212 TRANSCOA � T d ABSOLUTE PROPERTIES OF THE CAROLINAS LLC 331 METRO CIR� N y / PORTI 218 R( MAOLA MILK & ICE CREAM CO 307 METRO CIR ` -� DUKE ENERGY L. V. SUTTON ENERGY COMPLEX STATE PROPERTIES LLC US HWY 421 N �� V DUKE ENERGY PROGRESS 161P synTerra GRAPHIC SCALE 500 0 500 1000 IN FEET DRAWN BY: J. CHASTAIN DATE: 6/16/2020 REVISED BY: J. CHASTAIN DATE: 7/23/2020 CHECKED BY: H, SHARITT DATE: 6/16/2020 APPROVED BY: B. WYLIE DATE: 7/23/2020 PROJECT MANAGER: B. WYLIE www.synterracorp.com CT 4S LLC LD (OWNER) C OR {�\ 1 FIGURE 4-5 HB 630 COMPLIANCE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA Analytical Parameter Arsenic Arsenic Analytical Method Total Inorganics SPLP Reporting Units mg/kg pg/L PSRG Protection of Groundwater 5.8 NA 15A NCAC 02L Standard NA 10 2020 Provisional Background Threshold Values 1.8 1.56 Sample ID Depth Interval Sample (FEET BGS) Collection Date 1971 Ash Basin Samples No concentrations greater than applicable standard were observed in 1971 Ash Basin samples. Former Process Area Samples FPA-02 (0-0.5) 0 - 0.5 02/27/2020 94 29 FPA-02 (2-2.5) 2 - 2.5 02/27/2020 100 14 FPA-03 (7-7.5) 7 - 7.5 02/27/2020 6.8 1.8 FPA-03SB (1-2) 1 - 2 07/15/2019 19 1 14 FPA-06SB (8-10) 8 - 10 07/16/2019 21 9.5 FPA-08SB (1-2) 1 - 2 07/16/2019 45 38 FPA-08SB (2-4) 2- 4 07/16/2019 110 28 FPA-08SB (4-6) 4 - 6 07/16/2019 9.3 13 Former Ash Disposal Area Samples No concentrations greater than applicable standard were observed in FADA samples. Former Coal Pile Samples MW-43SB (1-2) 1 1 - 2 1 7/10/2019 13 Q MW-45SB 1 ♦ ♦ u 1M ♦ n ♦ �7!�/� I ♦ (lU:i�iA'J O 0 �UIL'3ilJ 1 Y I J FORMER 1984 ASH BASIN O 0 (�) 0 0 0 0� 0 ISE1.11.'Gl ORM ■ INSET ■ O Ullfl'/U e 0 99= gum '* 0 %♦ 0 OG.' : .♦ O MM } O� O O gum 01- — 0 SET SCALE: 1" = 160' i FPA-3SB 0 INSET LEGEND FIGURE NOTES: TABLE NOTES: GRAPHIC SCALE FIGURE 5-1a ('DUKE v5 0 175 350 ARSENIC IN UNSATURATED SOIL ENERGY (IN FEET) SOURCE AREA 1 & 2 PROGRESS DRAWN BY: C.DAVIS DATE:05/21/2019 1971 ASH BASIN, FORMER PROCESS AREA, COAL PILE AND REVISED BY: K. KING DATE: 05/21/2020 CHECKED BY:T. HARTMAN DATE: 05/21/2020 FORMER ASH DISPOSAL AREA CORRECTIVE ACTION PLAN UPDATE APPROVED BY: B. WYLIE DATE: 05/21/2020 L.V. SUTTON ENERGY COMPLEX synTerra PROJECT MANAGER: B. WYLIE WILMINGTON, NORTH CAROLINA www.synterracorp.com Analytical Parameter Selenium Selenium Analytical Method Total Inorganics SPLP Reporting Units mg/kg pg/L PSRG Protection of Groundwater 2.1 NA 1SA NCAC 02L Standard NA 20 2020 Provisional Background Threshold Values 1.9 1 Sample ID Depth Interval Sample (FEET BGS) Collection Date 1971 Ash Basin Samples No concentrations greater than applicable standard were observed in 1971 Ash Basin samples. Former Process Area Samples Former Ash Disposal Area Samples No concentrations greater than applicable standard were observed in FADA samples. Former Coal Pile Samples No concentrations greater than applicable standard were observed in Former Coal Pile samples. r� L MW-45SB 1 0 ItUKE E� ERGY PROGRESS FORMER 1984 ASH BASIN um 1 110 ♦ O OO U1L- M 1 O 71 B-02 11 B-11 1 SET SCALE: 1" = 1 SEEINSET, O ' O In "PA O O O if dirb p'0 O % ♦ I O� O� ♦i ♦ O i I O LEGEND O ---• FIGURE NOTES: .� -- -.- - -4 GRAPHIC SCALE 175 0 175 350 (IN FEET) DRAWN BY: C. DAVIS DATE: 05/21/2019 REVISED BY: K. KING DATE: 06/16/2020 CHECKED BY: T. HARTMAN DATE: 06/16/2020 APPROVED BY: B. WYLIE DATE: 06/16/2020 PROJECT MANAGER: B. WYLIE TABLE NOTES: I INSET FIGURE 5-1c SELENIUM IN UNSATURATED SOIL SOURCE AREA 1 & 2 1971 ASH BASIN, FORMER PROCESS AREA, COAL PILE AND FORMER ASH DISPOSAL AREA CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA Analytical Parameter Vanadium Vanadium Analytical Method Total Inorganics SPLP Reporting Units mg/kg pg/L PSRG Protection of Groundwater 350 NA 15A NCAC 02L Standard NA 0.3* 2020 Provisional Background Threshold Values 11 2 Sample ID Depth Interval Sample (FEET SGS) Collection Date 1971 Ash Basin Samples No concentrations greater than applicable standard were observed in 1971 Ash Basin samples. Former Process Area Samples No concentrations greater than applicable standard were observed in FPA sanples. Former Ash Disposal Area Samples No concentrations greater than applicable standard were observed in FADA sanples. Former Coal Pile Samples MW-43SB (1-2) 1 1- 2 1 7/10/2019 1 850 1 15 e lir INSET 110 0 vM U7LR.L7 OULL3UJ O UIl um O Ullfl'/U �®. GG 10'09M 00M O♦ - ' Oom 0 O --� INSET SCALE: 1" = 16w O SEE INSET A ■ ® ; a O O ■ O O _Opp . O -- — po O ♦ T b O If LEGEND 0 `• w as as MW-45SB MW-46SB FORMER COAL PILE MW-50SB I 41 P43S • I FIGURE NOTES: TABLE NOTES: GRAPHIC SCALE FIGURE 5-1d I ('DUKE 175 0 175 350 VANADIUM IN UNSATURATED SOIL ENERGY (IN FEET) SOURCE AREA 1 & 2 DRAWN BY: C.DAVIS DATE:05/21/2019 REVISED BY: K. KING DATE: 06/16/2020 CHECKEAPPROVDBY: TB.WYLI AN DATE:06/16/2020 PROGRESS 1971 ASH BASIN, FORMER PROCESS AREA, COAL PILE AND FORMER ASH DISPOSAL AREA CORRECTIVE ACTION PLAN UPDATE APPROVED BY: B. WYLIE DATE: O6/16/2020 PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX synTerra WILMINGTON, NORTH CAROLINA www.synterracorp.com Analytical Parameter Analytical Method Reporting Units PSRG Protection of Groundwater 15A NCAC 02L Standard 2020 Provisional Background Threshold Values Sample ID Depth Interval FEET BGS Sample Collection Date 84B-42 0-0.5 6 7 2019 84B-64 0-0.5 6/6/2019 846-88 0-0.5 6/6/2019 84B-113 0-0.5 6 6 2019 84B-113 2-2.5 6/6/2019 84B-115 0-0.5 1 6/5/2019 84B-119 0-0.5 6 6 2019 84B-134 0-0.5 6 3 2019 84B-136 0-0.5 6/ 3 2019 84B-138 0-0.5 6/6/2019 84B-174 84B-194 84B-196 84B-198 84B-207 0-0.5 84B-303 1 2-2.5 84B-344 1 2-2.5 ■ FIGURE NOTES: TABLE NOTES: 19 19 19 Arsenic Arsenic Total for anics SPLP m k L 5.8 NA NA 10 1.8 1.56 7.3 4.9 11 42 7_1 14 6_2 11 8.7 15 6_7 13 8_5 19 10 17 12 44 - 48 2.5 9.2 19 12 46 19 25 16( 19 24 50( 19 14 73 19 41 40 )19 46 17( 19 38 28( 19 17 26( 19 12 30( 19 1 7.6 1 61 7/3/2019 8.9 7 3 2019 7.5 7/3/2019 12 7/3/2019 1 35 • 40 140 • 78 ■� 93 1 58 ■ 41 130 ■ 37 84B-184 P84BL166 846-217 846-198 - A- A ,,% 1, • • ♦ ♦ ♦ • ♦ ♦ • ♦ Y•�r • `. ♦ r • • O ♦♦ Q:L' dE l'J:LiIlW • Qng@ Qnu • • • ♦ I •i v ♦I ■tom i LEGEND o • (' DUKE ENERGY PROGRESS GRAPHIC SCALE 200 0 200 400 (IN FEET) DRAWN BY: C. DAVIS DATE: 05/21/2019 REVISED BY: C. CURRIER DATE: 07/22/2020 CHECKED BY: T. HARTMAN DATE: 07/22/2020 APPROVED BY: B. WYLIE DATE: 07/22/2020 PROJECT MANAGER: B. WYLIE www.synterracorp.com • FIGURE 5-2a ARSENIC IN UNSATURATED SOIL SOURCE AREA 1 1984 ASH BASIN CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA R kI Analytical Parameterl Selenium I Selenium T Analytical Method Total SPLP - Inor anics Reporting Units m k L_ ction of Groundwater 2.1 NA 1 1 1 • �® ry r 84B-2 1 846-7 FORMER 1984 ASH BASIN 84B-11 ` r 1 _ 84B-26 84B-24 84B-22 84B-30 84B-28 I 8413-46 84B-44 84B-42 84B-51 84B-49 i I y 84B-68 coca 84B-69 coca 84B-91 84B-113 84B-111 84B-109 84B-119 84B-117R 84B-115 846-138 84B-136 MGM 8413-142 84B-140 A 8413-184 84B-16600006 84B-170 84B_P17 84B-198 84B-196 84B-194 84B-209 84B-207 8413-205 8413-203 84B-253 84B-233 84B-231 84B-229 84B-245 84B-243 8413-241 84B-239 846-237 846-268 846-266 846-264 846-280 846-278 846-276 8461274 8461272 846-303 84B-311 84B-309 846-307 846-332 84B-330 84B-328 84L, 6-346� 84B-344 846-342 A (' DUKE ENERGY PROGRESS GRAPHIC SCALE 200 0 200 400 (IN FEET) DRAWN BY: C. DAVIS DATE: 05/21/2019 REVISED BY: C. CURRIER DATE: 07/22/2020 CHECKED BY: T. HARTMAN DATE: 07/22/2020 APPROVED BY: B. WYLIE DATE: 07/22/2020 PROJECT MANAGER: B. WYLIE 846-356 846-354 84B-366 846-364 846.367 846-373 I LEGEND • FIGURE 5-2b SELENIUM IN UNSATURATED SOIL SOURCE AREA 1 1984 ASH BASIN CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 0 1 4, 2025 2040 ♦ 4r �1 1984 A S BASIN (LINED 1983 iXTENS/ON i FORMERASH FORM )ISPOSALAREA PROCESSAREA. FORMER COAL PILEI a I BASIN 1983 EXTENSION LEGEND ARSENIC CONCENTRATION > 100 Ng/L ARSENIC CONCENTRATION 14 - 100 Ng/L • SPLP SAMPLE LOCATION ASH BASIN WASTE BOUNDARY ■ ASH BASIN COMPLIANCE BOUNDARY ONSITE LANDFILL BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FPABOUNDARY FCPABOUNDARY EFFLUENT DISCHARGE CANAL DUKE ENERGY PROGRESS PROPERTY LINE C3 ll� 2030 Ll NOTES: 1. SPLP — SYNTHETIC PRECIPITATION LEACHING PROTOCOL 2.FPA—FORMER PROCESS AREA 3. FCPA— FORMER COAL PILE AREA 4. CCP — COAL COMBUSTION PRODUCTS 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 6. ALL BOUNDARIES ARE APPROXIMATE. 7. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). GRAPHIC SCALE 725 0 725 1,450 (IN FEET) DRAWN BY: R. KIEKHAEFER DATE: 05/21/2020 REVISED BY: R. KIEKHAEFER DATE: 06/16/2020 CHECKED BY: H. SHARITT DATE: 06/16/2020 APPROVED BY: B. WYLIE DATE: 06/16/2020 PROJECT MANAGER: B. WYLIE t DUKE ENERGY PROGRESS FIGURE 5-3a 1984 ASH BASIN ARSENIC SPLP MODEL SIMULATIONS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 2030 - ♦•�5 - ♦♦ f ♦ �os - ♦ ♦ o • • • • • • • • ' • • • • • • • • -< Y- ♦" ♦ ` 2 1 faml 'i 205 • • • • • • • • �. • • • • • • • • a <. • ♦ , .. ■ f I. } LEGEND NOTES: GRAPHIC SCALE 725 0 725 1,450 t�ENERGYSUKE FEErI BORON 700-4,000Ng/L 1. SIMULATIONS SHOW NO BORON ABOVE 2. SPLP -SYNTHETIC PRECIPITATION LEACHING 700 pg/L IN 2040 or 2050. (IN DRAWN BY:R.KIEKHAEFER DATE:05/21/2020 PROGRESS PROTOCOL • SPLP SAMPLE LOCATION ASH BASIN WASTE BOUNDARY 3. FPA-FORMER PROCESS AREA 4. FCPA- FORMER COAL PILE AREA REVISED BY: R. KIEKHAEFER DATE: 07/27/2020 CHECKED BY: H.SHARITT DATE:07/27/2020 APPROVED BY: B.WYLIE DATE:07/27/2020 10011 ASH BASIN COMPLIANCE BOUNDARY — ONSITE LANDFILL BOUNDARY 5. CCP - COAL COMBUSTION PRODUCTS PROJECT MANAGER: B. WYLIE synTerra FORMER ASH DISPOSAL AREA WASTE BOUNDARY 6.PROPERTYBOUNDARYPROVIDEDBYDUKEENERGY PROGRESS. m www.synterracorp.co FIGURE 5-3b FPA BOUNDARY FCPABOUNDARY 7. ALL BOUNDARIES ARE APPROXIMATE. JUNE17L 019.IMAGECOL ECTEDAPRIL04,2019ASERVERON 1984 ASH BASIN BORON SPLP MODEL SIMULATIONS CORRECTIVE ACTION PLAN UPDATE EFFLUENT DISCHARGE CANAL DUKE ENERGY PROGRESS PROPERTY LINE 9. DRAWING HAS BEEN SET WITH A PROJECTION CAROLINA SjATEPLANE COORDINATE SYSTEM (NAD83201 OF NORTH L.V. SUTTON ENERGY COMPLEX FIPS3200 WILMINGTON, NORTH CAROLINA 2025 1984 A S BASIN (LINED 1983 iXTENS/ON i FORMERASH FORM )ISPOSALAREA PROCESSAREA. FORMER COAL PILEI a 2040 LEGEND SELENIUM 20 - 139 Ng/L • SPLP SAMPLE LOCATION ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY ONSITE LANDFILL BOUNDARY FORMERASH DISPOSALAREA WASTE BOUNDARY FPA BOUNDARY FCPABOUNDARY EFFLUENT DISCHARGE CANAL DUKE ENERGY PROGRESS PROPERTY LINE L'A ll� Ll 2030 NOTES: 1. SPLP - SYNTHETIC PRECIPITATION LEACHING PROTOCOL 2.FPA-FORMER PROCESS AREA 3. FCPA- FORMER COAL PILE AREA 4. CCP - COAL COMBUSTION PRODUCTS 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 6. ALL BOUNDARIES ARE APPROXIMATE. 7. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). GRAPHIC SCALE 725 0 (IN FEET) 725 1,450 UKE t�EN RGY DRAWN BY: R. KIEKHAEFER DATE:05/21/2020 PROGRESS REVISED BY: R. KIEKHAEFER CHECKED BY: H. SHARITT DATE: 06/16/2020 DATE: 06/16/2020 APPROVED BY: B. WYLIE DATE: 06/16/2020 PROJECT MANAGER: B. WYLIE FIGURE 5-3c 1984 ASH BASIN SELENIUM SPLP MODEL SIMULATIONS CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA Note: *sampling events prior to 1/1/2018 1p° o\° V o Background Wells Ash Pore Water Wells 1984 Ash Basin Wells a ° x p � 2� ■ MW-05B AMBW-01S* ■ CCR-110B 0 MW-24RB oo � 1Z> • MW-05C AMBW-02S* • CCR-110C MW-24RC , RD■ , A, MW-08 CCR-112B o MW-31RC Boa * �� o\° V MW-08B V CCR-112C O MW-40B a MW-37B ♦ CCR-114B x MW-40C z MW-37C FPA Wells z CCR-114C SMW-05B Z AL* MW-41B * CCR-115B SMW-05C ■ FPA-02B CCR-115C • FPA-02C A FPA-03B v FPA-03C ♦ FPA-09B 1971 Ash Basin Wells D° , '`po z FPA-09C AW-06RB z MW-33C 80% D 80% ■ MW-12R a SMW-01B MW-19 • SMW-01C �� 60% ,�U � �60% 0'D MW-21C A SMW-06B o\o � 61 p MW-23B V SMW-06C ,40% �Q * \209% ■ ova moo � �,, z0��a 0 -0 0 0 0 a° o° 0 ryo �o �o Ca s— Ca Cl (votes: DRAWN BY: M. GUNN DATE: 5/5/2020 DUKE Groundwater data collected Q1 2020 (February 2020) unless noted with (_>. REVISED BY: FIGURE 5-4�� ENERGY Ash porewater groundwater data is most recent valid sample. DATE: 5/7/2020 ASH BASIN GROUNDWATER PROGRESS CHECKED BY: T. HARTMAN DATE: 5/7/2020 QUALITY PIPER DIAGRAMS APPROVED BY: L. DRAGO CORRECTIVE ACTION PLAN UPDATE '6 PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX synTerra WILMINGTON, NORTH CAROLINA www.synterracorp.com Note: *sampling events prior to 1/1/2018 Offsite Private Wells S-01 New Well - S-07* • S-01 Old Well = S-08 Well 1* A' S-02 Pumphouse `' S-09 Well 2 V S-02 Well 1& 2 S-12 * S-03 S-17* X S-04 S-18 * S-06* /o 0 0 U ��o❑ o° co 3a D O O 1 D ■ Z y Background Wells Ash Pore Water Wells ■ MW-05B AMBW-01S* • MW-05C AMBW-02S AL MW-08 V MW-08B MW-37B z MW-37C * MW-41B o 0 , , 11110 80% ' 2 U5 ■ 80% ]' �k x o ■ 'L 60% o o ZV QI 60°I0 a � AD 20% yk# Z■ 10P D 00D o,° S a a d!o OD OD ry� o a a o 4-- Ca CI --w (Votes: DRAWN BY: M. GUNN DATE: 5/5/2020 Background groundwater data collected Q1 2020 (February 2020). DUKE REVISED BY: FIGURE 5-5 Off -Site supply well data collected January 2018 unless noted with (*). ENERGY DATE:5/7/2020 SUPPLY WELL GROUNDWATER Ash porewater groundwater data is most recent valid sample. PROGRESS CHECKED BY: T. HARTMAN DATE: 5/7/2020 QUALITY PIPER DIAGRAMS APPROVED BY: L. DRAGO CORRECTIVE ACTION PLAN UPDATE 417 PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX I WILMINGTON, NORTH CAROLINA �11.1TEna www.synterracorp.com C ve 6 v x x Surface Water p° ?y Background Surface Water co 4 8-0 ■ SW-01 , ■ SW-14 SW-02 D° o� • SW-15 o � A SW-03 SW-04 SW-05 Z SW-06 * SW-08 ❑ SW-09 0 �' , 0 SW-10 N $0% 2 G� $0% R IL SW-11 Q SW-12 �4' 60% ,ZV 60% Np P, Q SW-13 , oho moo° g SW-16 40% 40%\ � SW- 17 � moo° z0°ifl zo% 0 D° D° r� D° Do f— Ca _• ._• Cl Notes: ('DUKE DRAWN BY: M. GUNN DATE: 5/5/2020 FIGURE 5-6 Surface water samples collected June 2019 as part of current conditions 2B/21- evaluation, (See Appendix K). ENERGY EN REVISED BY: DATE: 5/7/2020 SURFACE WATER CHECKED BY: T. HARTMAN DATE:5/7/2020 QUALITY PIPER DIAGRAMS APPROVED BY: L. DRAGO CORRECTIVE ACTION PLAN UPDATE L� PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX www.synterracorp.com synTena WILMINGTON, NORTH CAROLINA ♦ NOTES: TABLE 5-4. TABLE 5.4 1;1 �qp" a, *r OUTFACE 004 � �� `♦ � , OUTFACE 002 OUTFALL 008 / '� • • LEGEND �� • • s n j: GRAPHIC SCALE DUKE 500 0 500 1,000 FIGURE 5-7a AP ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 1 PROGRESS DRAWN BY. C.WYATT DATE:04/30/2020 ARSENIC IN UPPER SURFICIAL FLOW ZONE REVISED BY: C. CURRIER DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE _ CHECKED BY:T.HARTMAN DATE: 07/30/2020 L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE DATE: 07/30/2020 WILMINGTON, NORTH CAROLINA ��, -ainTPrm PROJECT MANAGER: B. WYLIE NOTES: TABLE 5.4 ki OUTFACE TABLE 5-4. 1984 ASH-- • ` BASIN ••- - (LINED) •• 1984ASH •• •,- BASIN 1971 /I (LINED) _ • I A I , ASH ASH • � '� •• BASINro �� ,• • 198S COOLING POND EXTENSION �' ',, • (LAKE SUTTON) ON • •• i . , FORMER _ � ` FORMER AREA I/ � PROCESS AREA �I DISPOSAL ///� m EFFL FORMER COAL PILE CAPE FEAR RIVER GRAPHIC SCALE DUKE 500 0 500 i,o00 FIGURE 5-7b ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 1 PROGRESS DRAWN Br. C.WYATT DATE:04/30/2020 ARSENIC IN LOWER SURFICIAL FLOW ZONE _ REVISED BY: C. CURRIER CHECKED BY:T.HARTMAN DATE: 07/30/2020 DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE L.V. S UTTO N ENERGY COMPLEX APPROVED BY: B. WYLIE DATE: 07/30/2020 WILMINGTON, NORTH CAROLINA ///� synTerra PROJECT MANAGER: erranorn.com NOTES: TABLE 5-4. EA IOUTFALL 0081 LEGEND ♦ ♦ LD FORMER COAL PILE CANAL • (' DUKE V ENERGY PROGRESS +i, TABLE 5.4 � \ a GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 04/30/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: T. HARTMAN DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE • 0 o'o a a — _ _ - s v 3 _, 'ir6'r:eesi� ♦ FIGURE 5-8a ISOCONCENTRATION MAP - SOURCE AREA 1 BORON IN UPPER SURFICIAL FLOW ZONE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA I. � OUTFACE 001 (' DUKE V ENERGY PROGRESS 17 NOTES: TABLE 5.4 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 04/30/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: T. HARTMAN DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE TABLE 5-4. FIGURE 5-8b ISOCONCENTRATION MAP - SOURCE AREA 1 BORON IN LOWER SURFICIAL FLOW ZONE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA EA OUTFALL OUTFALL I• C TABLE 5.4 l,. am • f TABLE 5-4. 0CY�� 0 Yam. i` • "• Q • O... • �' • ; fix: a O ♦ �� • . - � 1r ,� � - *h �� :fit � » v DUKE GRAPHIC SCALE 500 0 500 i,o00 FIGURE 5-9a ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 1 PROGRESS DRAWN Br. C.WYATT DATE:04/30/2020 MOLYBDENUM IN UPPER SURFICIAL FLOW ZONE REVISED BY: C.CURRIER DATE:07/30/2020 CORRECTIVE ACTION PLAN UPDATE - CHECKED BY:T.HARTMAN DATE:07/30/2020 L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE DATE: 07/30/2020 WILMINGTON, NORTH CAROLINA ��, tvnTPrra PROJECT MANAGER: B. WYLIE OUTFACE 008 LEGEND 0 O � OUTFACE 001 I NOTES: TABLE 5.4 i CCP LANDFILL 1 TABLE 5-4. DUKE GRAPHIC SCALE 500 0 500 1,000 FIGURE 5-9b ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 1 PROGRESS DRAWN Br. C.WYATT DATE:04/30/2020 MOLYBDENUM IN LOWER SURFICIAL FLOW ZONE _ REVISED BY: C.CURRIER CHECKED BY:T.HARTMAN DATE:07/30/2020 DATE:07/30/2020 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE DATE: 07/30/2020 WILMINGTON, NORTH CAROLINA ///� synTerra PROJECT MANAGER: erranorn.com ♦ NOTESE-1 1 7 Q� T� - --�- _:: • III[ _- elm` INTAKE CANAL /� (' DUKE V ENERGY PROGRESS m TABLE 5.4 �0 0 0 Ie 0• • 0 FLUEN GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 04/30/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: T. HARTMAN DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE www.synterraoorp.com TABLE 5-4. ♦ ♦ R� FIGURE 5-10 ISOCONCENTRATION MAP - SOURCE AREA 1 SELENIUM IN LOWER SURFICIAL FLOW ZONE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA EA OUTFALL I L�\\\ —A �i OUTFALL 0 22 OUTFALL 008 LEGEND 0 A NOTES: +i, TABLE 5.4 �. CCP LANDFIL 984 ASH- �� BASIN (LINED) - 1984 ASH �� ■ BASIN (LINED) ASH ASH BASIN ty FORMER COAL PILE ]e • TABLE 5-4. GRAPHIC SCALE DUKE 500 0 500 l'o00 FIGURE 5-11a ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 1 PROGRESS DRAWN BY:C.WYATT DATE:04/30/2020 STRONTIUM IN UPPER SURFICIAL FLOW ZONE _ REVISED BY: C.CURRIER CHECKED BY:T.HARTMAN DATE:07/30/2020 DATE:07/30/2020 CORRECTIVE ACTION PLAN UPDATE L.V. S UTTO N ENERGY COMPLEX APPROVED BY: B. WYLIE DATE: 07/30/2020 WILMINGTON, NORTH CAROLINA ///� synTerra PROJECT MANAW:sB erracoro.com ♦ NOTESE-1 1 INTAKE CANAL (' DUKE V ENERGY PROGRESS m TABLE 5.4 • i 0 0 �0 0 ELLA • • • 0 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 04/30/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: T. HARTMAN DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE www.synterraoorp.com TABLE 5-4. } FIGURE 5-11b ISOCONCENTRATION MAP - SOURCE AREA 1 STRONTIUM IN LOWER SURFICIAL FLOW ZONE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA E z 0 H > 0 W J W A - (WEST) i COOLING POND _--------W.L. ELEV. B_10_ L.V.SUTTON ENERGY COMPLEX CCR SURFACE IMPOUNDMENT LIMIT OF POND BASED 1 m U 0 o CO of Ir 00 00 0 o = 00 NOf m w -1 -1 FORMER 0-- m ¢ 0 ASH U U of U SURFACE J C c� EXCAVATED L AREA 2-108RB —_—_-- — 142 o— DREDGED AREA AREA -LINED 0 O Lu Q N 11 S. T. WOOTEN CORP. SAND QUARRIES W UJ Q z— �0 0 ry p N rL J J w � U U UPPER SURFICIAL ZONE Q WITH SILTS & SANDS 0 O Lu m U) 0 0 C J - A' (EAST) 100 50 -- 4f z 0 0 > W J W 50 B rc I 453 BTW-13NC TW-136 MW-23C B NC B 52 MW-12R B MW-6B4 -50 B 219 LOWER SURFICIAL ZONE WITH SALINE AQUIFER CONDITIONS IN THE �— COARSE SANDS AND SILT LOWER PEEDEE FORMATION UPPER PEEDEE FORMATION B 11 100 ZONES OF SILTS AND FINE SANDS -100 --------------------------------------------------------------------- LOWER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LEGEND MW 23B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER MW 23C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION MW 23D WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION MW 23E WELL IN LOWER PEEDEE FLOW ZONE V UPPER PEEDEE FLOW ZONE GROUNDWATER ABM W 5S WELL ABANDONED WELL WATER LEVEL ELEVATION SUT EW 5 EXTRACTION WELL IN LOWER SURFICIAL FLOW ZONE LOWER PEEDEE FLOW ZONE GROUNDWATER S- 21 WATER SUPPLY WELL WELL WATER LEVEL ELEVATION MW-12R B 1 219 1 BORON (B) CONCENTRATION (Ng/L) GENERALIZED WATER TABLE GENERALIZED GROUNDWATER —, FLOW DIRECTION WELL SCREEN SURFACE WATER ASH BASIN COMPLIANCE BOUNDARY O LOWER SURFICIAL NC NOT CALCULATED Al r1TC C 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-4 FOR THE FULL DATASET. 5. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 6. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 7. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. 8. CTV-CENTRAL TENDENCY VALUE. 9. < - LESS THAN ANALYTICAL PARAMETER REPORTING B UNITS ug/L 15A NCAC 02L STANDARD 700 BACKGROUND THRESHOLD VALUE 50 (SURFICIAL UPPER FLOW ZONE) + BACKGROUND THRESHOLD VALUE 50 (SURFICIAL LOWER FLOW ZONE) + +- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION B- (NORTH) COMPLIANCE BOUNDARY 1984 ASH BASIN (LINED) 1971 ASH BASIN 1984 ASH BASIN (20061NTERIOR 0 CD 0 100 CONTAINMENT a0 N co co U m AREA) 0 0 co C) m U o �� W W N Q Q U U U m— W 00 00 0 -1 - co FORMERASH� > FORMER ASH 00 co co -1 GRAVEL SURFACE SURFACE 50 Q Q UUU /ROAD FORMER ASH O UUU / SURFACE CLAY LINERi----J z — J CLAY LINER z \------ B NC L Op AW- B — — — — — — — — — — — — — — — — — —_—_—_—_—_—_— _—_—_—_— B NC MW4 B ----------------------------- ---- -- DREDGED ------ --- B 86 ----- _ _ B <50 ='SATURATED SOIL_---- ______ ___ _____ AREA ------- -- > MW-386 CCR-114B -------------------------------- --————————————----- ------------------ ----- — - J B N MW-40I B < — — — — — BCR-10677 B 1 335 W AW-8C B 243 TW-136 -50 B <50 MW-38C CR-114 B NC -- — B 110----------- — B <---------------OWERSU---- ---------------------------- ------------------------------- LOWER SURFICIAL UPPER PEEDEE FORMATION ZONE WITH COARSE R-1 SANDS AND SILT ZONES OF SILTS AND FINE SANDS LOWER PEEDEE FORMATION B 1,521 -100 ZONES OF SILTS AND FINE SANDS SALINE AQUIFER CONDITIONS � SALINE AQUIFER CONDITIONS IN THE PEEDEE FORMATION LOWER PEEDEE FORMATION IN THE PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LOWER SURFICIAL ZONE WITH COARSE SANDS AND SILT -150 LEGEND MW-41B WELL IN UPPER SURFICIAL FLOW ZONE MW 41C WELL IN LOWER SURFICIAL FLOW ZONE MW 41D WELL IN UPPER PEEDEE FLOW ZONE MW 41E WELL IN LOWER PEEDEE FLOW ZONE ABMW 1S WELL ABANDONED — — GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL SATURATED SOIL NC NOT CALCULATED V UPPER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION V UPPER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION LOWER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION FPA-4B BORON (B) CONCENTRATION (gg/L) B 1 <50 WELL SCREEN ASH BASIN COMPLIANCE BOUNDARY NOTES FORMER PROCESS AREA (FPA) B' (SOUTH) 100 50 z 0 O Lu -j Lu -50 -100 -150 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-4 FOR THE FULL DATASET. 4. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 5. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 6. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. 7. CTV - CENTRAL TENDENCY VALUE. 8. < - LESS THAN ANALYTICAL PARAMETER B REPORTING UNITS Ng/L 15A NCAC 02L STANDARD 700 BACKGROUND THRESHOLD VALUE 50 (SURFICIAL UPPER FLOW ZONE) + BACKGROUND THRESHOLD VALUE 50 (SURFICIAL LOWER FLOW ZONE) + + - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION 0 1 A - - A' (WEST) (EAST) ZONES OF SILTS AND FINE SANDS LEGEND MW 23B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER MW 23C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION MW-23D WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION MW 23E WELL IN LOWER PEEDEE FLOW ZONE V UPPER PEEDEE FLOW ZONE GROUNDWATER ABM W 5S WELL ABANDONED WELL WATER LEVEL ELEVATION SUT EW 5 EXTRACTION WELL IN LOWER SURFICIAL FLOW ZONE V LOWER PEEDEE FLOW ZONE GROUNDWATER S- 21 WATER SUPPLY WELL MW-12R WELL WATER LEVEL ELEVATION ARSENIC (As) CONCENTRATION (Ng/L) GENERALIZED WATER TABLE Se <� p SELENIUM (Se) CONCENTRATION (Ng/L) _, GENERALIZED GROUNDWATER FLOW DIRECTION WELL SCREEN O SURFACE WATER ASH BASIN COMPLIANCE BOUNDARY O LOWER SURFICIAL NC NOT CALCULATED 100 50 ^ Z O 0 > W J W 50 100 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-4 FOR THE FULL DATASET. 5. ARSENIC (As) AND SELENIUM (Se) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (ug/L). 6. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 7. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. 8. CTV - CENTRAL TENDENCY VALUE. 9. < - LESS THAN ANALYTICAL PARAMETER As Se REPORTING UNITS Ng/L Ng/L 15A NCAC 02L STANDARD 10 20 BACKGROUND THRESHOLD VALUE 2.0 1.0 (SURFICIAL UPPER FLOW ZONE) + BACKGROUND THRESHOLD VALUE 14 1.0 (SURFICIAL LOWER FLOW ZONE) + + - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION B- (NORTH) COMPLIANCE BOUNDARY 1984 ASH BASIN (LINED) 1971 ASH BASIN 1984 ASH BASIN (20061NTERIOR o `� Lo m 100 CONTAINMENT a0 0 0`0 co 0 m U m N AREA) 0_ O co 0 co N a s U U U m e ao � 00 00 °0 co c1 0 0 0 1 � � � GRAVEL FORMER ASH m � FORMER ASH � > SURFACE FORMER ASH SURFACE 50 ¢ Q UUU /ROAD UUU / SURFACE ` 770 CLAY LINER �-- CLAY LINER L -----� — — — — — _ — _ Tw 202 As NC —�-- ---- --- � Se NC L 0 AW-8B MW-40B _ _ ----- ----------------- ---- Q As NC Se NC MW- B As NC As NC Se NC CCR-114B----�-----------SATURATED SOIL ______ SATURATED —____ — ___-DREDGED ______ ___— As 4.2 As <1.0 ----------------- ---------- — — — — — — — — AREA ——_—_—_—_—_— — <1. Lu � W _ As <1.0 MW-40C Se <1.0 MW-38C As <1.0 CCR-114C ------------------- ------ --- — _— -- --NC-- CR-105B —————— — — — — As 258 TW-136 FPA-9C -50 e <1.0 As <1 0 Se 39.0 As N As 21.0 ------------------ — — — _ _ — — — 20.0 ---------------------------- ------- ------------------------ a <1.0 LOWER SURFICIAL ZONE WITH COARSE UPPER PEEDEE FORMATION / CCR-105C As 169 SANDS AND SILT ZONES OF SILTS AND FINE SANDS LOWER PEEDEE FORMATION I Se I NC -100 ZONES OF SILTS AND FINE SANDS SALINE AQUIFER CONDITIONS SALINE AQUIFER CONDITIONS IN THE PEEDEE FORMATION LOWER PEEDEE FORMATION IN THE PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LOWER SURFICIAL ZONE WITH COARSE SANDS AND SILT -150 LEGEND MW 41B WELL IN UPPER SURFICIAL FLOW ZONE MW-41C WELL IN LOWER SURFICIAL FLOW ZONE MW 41D WELL IN UPPER PEEDEE FLOW ZONE MW 41E WELL IN LOWER PEEDEE FLOWZONE ABMW 1S WELL ABANDONED GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL SATURATED SOIL NC NOT CALCULATED B' (SOUTH) FORMER PROCESS AREA (FPA) 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5.4 FOR THE FULL DATASET. 4. ARSENIC (As) AND SELENIUM (Se) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (ug/L). 5. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 6. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. UPPER SURFICIAL FLOW ZONE GROUNDWATER 7, CTV -CENTRAL TENDENCY VALUE. WELL WATER LEVEL ELEVATION LOWER SURFICIAL FLOW ZONE GROUNDWATER 8. < - LESS THAN WELL WATER LEVEL ELEVATION V UPPER PEEDEE FLOW ZONE GROUNDWATER ANALYTICAL PARAMETER As Se WELL WATER LEVEL ELEVATION REPORTING UNITS Ng/L Ng/L LOWER PEEDEE FLOW ZONE GROUNDWATER 15A NCAC 02L STANDARD 10 20 WELL WATER LEVEL ELEVATION BACKGROUND THRESHOLD VALUE 2.0 1.0 (SURFICIAL UPPER FLOW ZONE) + FPA-4C ARSENIC (As) CONCENTRATION (Ng/L) BACKGROUND THRESHOLD VALUE 14 1.0 1.9 Se I <1.0 SELENIUM (SE) CONCENTRATION (Ng/L) (SURFICIAL LOWER FLOW ZONE) + + - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM WELL SCREEN BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. ASH BASIN COMPLIANCE BOUNDARY 100 50 Z 0 O Q w W -50 -100 -150 CROSS SECTION LOCATION 0 1 A - (WEST) ZONES OF SILTS AND FINE SANDS LEGEND MW 23B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER MW 23C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION MW 23D WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION MW 23E WELL IN LOWER PEEDEE FLOW ZONE V UPPER PEEDEE FLOW ZONE GROUNDWATER ABMW 5S WELL ABANDONED WELL WATER LEVEL ELEVATION SUT EW 5 EXTRACTION WELL IN LOWER SURFICIAL FLOW ZONE LOWER PEEDEE FLOW ZONE GROUNDWATER S 12 WATER SUPPLY WELL SMW-06C WELL WATER LEVEL ELEVATION MOLYBDENUM (Mo) CONCENTRATION (Ng/L) — — GENERALIZED WATER TABLE Sr `73 STRONTIUM (Sr) CONCENTRATION (ug/L) _, GENERALIZED GROUNDWATER FLOW DIRECTION WELL SCREEN SURFACE WATER ASH BASIN COMPLIANCE BOUNDARY NC LOWER SURFICIAL NOT CALCULATED - A' (EAST) NOTES 100 50 ^ Z Q Q H W J W -50 -100 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-4 FOR THE FULL DATASET. 5. MOLYBDENUM (Mo) AND STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 6. INC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 7. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. 8. CTV-CENTRAL TENDENCY VALUE. 9. <-LESS THAN ANALYTICAL PARAMETER Mo Sr REPORTING UNITS Ng/L Ug/L 15A NCAC 02L STANDARD NE NE BACKGROUND THRESHOLD VALUE 1.0 71 (SURFICIAL UPPER FLOW ZONE) + BACKGROUND THRESHOLD VALUE 1.0 167 (SURFICIAL LOWER FLOW ZONE) + + - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION B---a (NORTH) z 1 Op LOWER SURFICIAL ZONE WITH COARSE SANDS AND SILT -100 SALINE AQUIFER CONDITIONS IN THE PEEDEE FORMATION Qli 1984 ASH BASIN (LINED) I COMPLIANCE BOUNDARY (ZUUb IN I tKIUK 0 CONTAINMENT < m U 0 2 AREA) 0O m W N FORMER ASH GRAVEL � SURFACE U U U /ROAD FORMER ASH 0 U U c) / SURFACE _ _ CLAY LINER � r''r — `� �'' ^ TW-202 ------ �-- CLAY LINER Mo NC \ — r— N-- CCR-1146 — _ _________ _- SATURATED SOIL _ _ _ _ _ _ _ _ _ Mo<1.0 --------------------------------- ------------------- r 139 ______ � LOWER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LEGEND 1971 ASH BASIN m U � (.0O O O co < < 1-- U U U \ FORMER ASH SURFACE ---------------------------------- UPPER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS LOWER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS MW 41B WELL IN UPPER SURFICIAL FLOW ZONE MW 41C WELL IN LOWER SURFICIAL FLOW ZONE MW 41D WELL IN UPPER PEEDEE FLOW ZONE MW 41E WELL IN LOWER PEEDEE FLOW ZONE ABMW 1S WELL ABANDONED GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL SATURATED SOIL NC NOT CALCULATED UPPER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION V UPPER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION V LOWER PEEDEE FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION FPA-04B MOLYBDENUM (Mo) CONCENTRATION (Ng/L) Mo 1. STRONTIUM (Sr) CONCENTRATION (Ng/L) WELL SCREEN — ASH BASIN COMPLIANCE BOUNDARY DREDGED— _ FORMER PROCESS AREA (FPA) B' (SOUTH) 100 50 Z 0 Q LU w -50 CCR-105C FPA-04B Mo 121 Mo <1.0 Sr NC SALINE AQUIFER CONDITIONS -100 IN THE PEEDEE FORMATION LOWER SURFICIAL ZONE WITH COARSE SANDS AND SILT -150 AIl1TCC 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 AND 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. ALL BOUNDARIES ARE APPROXIMATE. 4. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-4 FOR THE FULL DATASET. 4. MOLYBDENUM (Mo) AND STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 5. INC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-4). 6. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. 7. CTV - CENTRAL TENDENCY VALUE. 8. < - LESS THAN ANALYTICAL PARAMETER Mo Sr REPORTING UNITS Ng/L Ng/L 15A NCAC 02L STANDARD NE NE BACKGROUND THRESHOLD VALUE 1.0 71 (SURFICIAL UPPER FLOW ZONE) + BACKGROUND THRESHOLD VALUE 1.0 167 (SURFICIAL LOWER FLOW ZONE) + + - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION Lower Surficial Upgradient of SA1 Lower Surficial Upgradient of SA1 Upper Surficial Upgradient of SA1 2.0 • 120 • • 2 • 1.5 • • J 80 • •• • 2 a' We1CCR-120C ? Well ? • Well • " • • CCR-123C • • CCR-120B a=i • • • • MW-19 y • • • MW-21 C E ti • CCR-123B 1.0 40 1 • • • 0.5 160 200 300 400 500 100 200 300 400 500 0 200 400 EH (mV) EH (mV) EH (mV) Lower Surficial Downgradient of SA1 Upper Surficial Downgradient of SA1 160 • • • • 150 J 120 J • • Well ? • • Well • CCR-109C V • CCR-112B Space not used 125 • • CCR-110C • • CCR-113B L L • Q • • Q • • 80 • • • • 100 • • • • • 40 100 200 300 100 200 300 400 EH (mV) EH (mV) NOTES 441�DUKE DRAWN BY: K.MARSAC DATE:7/20/2020 FIGURE 5-15a pg/L - Micrograms per liter ENERGY REVISED BY: K. MARSAC CONCENTRATION PLOTS Eh - Redox Potential PROGRESS CHECKED BY: T. HARTMAN ARSENIC VERSUS EH mV - Millivolts APPROVED BY: B. WYLIE CORRECTIVE ACTION PLAN UPDATE • Data included was collected between January 2018 and March 2020 10 PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX • Refer To Table 2 of Appendix C for source data series symTerm WILMINGTON, NORTH CAROLINA www. synterracorp. com iD]X J cm ♦V� 50 L I' El mus 100 a� A� N 50 Q CCR-120B c . 0 I 5 c0 X W m 0 0 06 � V N U N N cn o w o U m X O Q W N U� W C N f0 m L Q 2016 2017 2018 2019 2020 Date CCR-120C C O cu X W C E C 0 LL E 06 > U N � O W EO CU "I C 0 X W > Q U X W C N c0 m L Q 2016 2017 2018 2019 2020 Date 400 100 J CD M =L 200 L 50 Q 0 CCR-123B C a C ca ca X X W ca j,��V.2E Q U X W C .y M m L Q 2016 2017 2018 2019 Date CCR-123C 125 ffirt 400 a� 75 ZOO Q 50 25 2016 2017 2018 2019 Date M O Q X O W a)C Q o ° 06 N c0 X O W C C O—t. O ca o U m L W +o + Q X W C y M m L N Q 1 1 400 .-. M J_ a) = _ V �_ 200 " N Q 500 400 2' J M 300 ._ � i 1i Q 200 100 nalAi -In Date n111Ai n-It-% Date 0= 0 0 0 0 0= O� 0 LEGEND NOTES Plots of arsenic left axis and E ri ht axis over time u radient /L - Micro rams er liter ( y-axis)" (g y-axis)pg E g p + Arsenic of Source Area 1 in the upper surficial flow zone (top row) and lower Eh - Redox Potential surficial flow zone (bottom row). Dates of ash basin excavation mV - Millivolts + EH begins, extraction system online, and ash basin excavation complete and FADA excavation start are marked with vertical lines. Refer to 44*) DUKE ENERGY PROGRESS DRAWN BY: K. MARSAC DATE: 7/20/2020 REVISED BY: K. MARSAC CHECKED BY: T. HARTMAN APPROVED BY: B. WYLIE PROJECT MANAGER: B. WYLIE FIGURE 5-15b TIME VERSUS CONCENTRATION ARSENIC AND E UPGRADIENT OF H SOURCE AREA 1 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX 10 synTerra Table 2 of Appendix C for source data series. www.synterracorp.com WILMINGTON, NORTH CAROLINA CCR-109B CCR-110B CCR-113B cc 200 0 .LPU 400 200 0 400 200 400 .� 150 = W 0 300 i �, ly o � tl1 W o � m o rn 150 m o 300 rn 150 0 ° 300 rn •E 100 0 >, 200 •� X E •c X E X .� 0 < o = < �.. Q ° _ " 100 Q m = 200... i Q 100 m o 200 50 Q W 100 Q X X _ W _ W ._ I m 50 m 100 m p cop Q 50 n 100 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 Date Date Date CCR-109C CCR-110C CCR-113C U) o = 400 150 X W 300 150 X 300 90 N L) X ^ J _ N Q 0 " J � 00 = c W a Q ^ J _ cm m N W __ = ¢ 300 rn •� 100 0 200 •� 100 200 •� 60 c `� E W -- W = s 0 0 < < m �, < 0 200 < Q i m m o !0 i Q m x o !0 m N > X N Q X W f0 U 30 N Q W M 0 50 Q 100 50 100 100 M m m CU L co Q L Q r L Q 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 0 2016 2017 2018 2019 2020 0 Date Date Date LEGEND NOTES 446) DUKE DRAWN BY: K.MARSAC DATE:7/20/2020 FIGURE 5-15c Plots of arsenic (left y-axis) and EH (right y-axis) over time downgradient IJg/- Micrograms per liter ENERGY REVISED BY: K. MARSAC VERSUS CONCENTRATION } Arsenic of Source Area 1 in the upper surficial flow zone (top row) and lower - Eh Redox Potential PROGRESS CHECKED BY: T. HARTMAN ARSENIC AND ETIME H DOWNGRADIENT OF surficial flow zone (bottom row). Dates of ash basin excavation begins, mV - Millivolts APPROVED BY: B. WYLIE SOURCE AREA 1 + EH extraction system online, and ash basin excavation complete and FADA 10 PROJECT MANAGER: B. WYLIE CORRECTIVE ACTION PLAN UPDATE excavation start are marked with vertical lines. Refer to Table 2 of synTerm L.V. SUTTON ENERGY COMPLEX Appendix C for source data series. www.synterracorp.com WILMINGTON, NORTH CAROLINA A: ``s • k AREA 1 B • AREA 2 LEUEND AREAS 1A/1 B/4 - CONFIRMATION L GROUNDWATER MONITORING AREAS 2/3A- ONGOING CLOSURE ACTIVITIES AREA 3B - MNA REMEDY EXTRACTION WELL ♦ NPDES OUTFALL LOCATION • SUPPLY WELLS ANTICIPATED EFFLUENT CANAL EXTENSION ASH BASIN WASTE BOUNDARY ■ ■ ASH BASIN COMPLIANCE BOUNDARY ONSITE LANDFILL BOUNDARY ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY _ DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION NOTES: 1. THE OUTLINE OF AREAS 1 THROUGH 4 REPRESENT THE AREAS WHERE THE MAXIMUM EXTENT OF COIS ARE GREATER THAN COMPARISON CRITERIA IN GROUNDWATER ASSOCIATED WITH THE SUTTON SOURCE AREAS. 2. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 3. CCP - COAL COMBUSTION PRODUCTS 4. COIS - CONSTITUENTS OF INTEREST 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 6. ALL BOUNDARIES ARE APPROXIMATE. 7. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). 1984 ASH BASIN (LINED) (' DUKE V ENERGY PROGRESS 1984 ASH BASIN (LIN Ak AREA 3B e AREA 1A `0 GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: C. WYATT DATE: 10/07/2019 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: H. SHARITT DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE • • • FIGURE 5-16 INTERIM ACTION SYSTEM LAYOUT CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 7 s� /�. I I I i i r � 4 i I, LEGEND NPDES OUTFALL LOCATION ; SUPPLY WELLS RESTRICTED GROUNDWATER USE DESIGNATION LIMIT GROUNDWATER FLOW DIRECTION I 1 SURFACE WATER FLOW DIRECTION I EFFLUENT DISCHARGE CANAL CURRENT ASH BASIN COMPLIANCE BOUNDARY / FORMER PROCESS AREA BOUNDARY / FORMER COAL PILE AREA BOUNDARY , #' ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY .� ONSITE LANDFILL COMPLIANCE .1000, BOUNDARY FORMERASH DISPOSAL AREA WASTE BOUNDARY DUKE ENERGY PROGRESS PROPERTY LINE 0 COMBINED SIMULATED BORON AND SELENIUM 02L PLUME ANTICIPATED EFFLUENT CANAL EXTENSION NOTES 1. THE PROPOSED RESTRICTED GROUNDWATER USE DESIGNATION IS DRAWN AT THE LEADING DOWNGRADIENT EDGE WHERE PREDICTED ONSITE COI CONCENTRATIONS ARE GREATER THAN COMPARISON CRITERIA. 2. CALIBRATION OF THE COMBINED 02L PLUME CAN BE FOUND IN THE UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA (FALTA, GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2020). 3. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 4. CCP -COAL COMBUSTION PRODUCTS. 5.COIS-CONSTITUENTS OF INTEREST 6. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. DUKE � ENERGY TALL BOUNDARIES ARE APPROXIMATE. PROGRESS &AERIAL PHOTOGRAPHY OBTAINED FROM TERRASERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 9. DRAWING HAS BEEN SET WITHA PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). A m-% -Y7 r i r GRAPHIC SCALE 600 0 600 1,200 (IN FEET) DRAWN BY: C. WYATT DATE: 04/27/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: H. SHARITT DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE FIGURE 5-17 PROPOSED RESTRICTED GROUNDWATER USE CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA •1 a M W-39B ivivl v-zirsl MW-39C MW-27C MW-40B MW-40C _ CCR-114B CCR-114C CCR-113B CCR-113C CCR-112B CCR-112C CCR-111 B 77R-1117. 11C. CCR-110B CCR- CCR-109B " CCR-109C now n ao� CCR-108RB CCR-108RC CCR-107RB / CCR-107RC LEGEND WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE SUPPLY WELL Ak NPDES OUTFALL LOCATION AREAS 1A/1B/4 - CONFIRMATION GROUNDWATER MONITORING _ AREA 2 - ONGOING CLOSURE ACTIVITIES ANTICIPATED EFFLUENT CANAL EXTENSION ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION 1. SEE APPENDIX P FOR MORE DETAILED INFORMATION RELATED TO EFFECTIVENESS MONITORING PLAN (EMP) ELEMENTS FOR THE 1971/1984ASH BASINS AND FPA. MONITORING WELLS SHOWN ON THIS FIGURE ARE PLANNED TO BE SAMPLED AS PART OF THE EMP. 2. THE OUTLINE OF AREAS 1A, 1 B, 2, AND 4 REPRESENT THE AREAS WHERE THE MAXIMUM EXTENT OF COIS ARE GREATER THAN COMPARISON CRITERIA IN GROUNDWATER DOWNGRADIENT OF THE SUTTON SOURCE AREAS AT OR BEYOND THE COMPLIANCE BOUNDARY FOR ALL FLOW LAYERS. 3. CCP - COAL COMBUSTION PRODUCTS 4. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM. 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 6. ALL BOUNDARIES ARE APPROXIMATE. 7. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). �MW-31RB 0 MW-31RC .'., ` E CCR-119B • '� `� �, ® CCR-119C �`' • - CCR-120B ®CCR-120C `. ® SMW-6B 1 SMW-OC • CCR-204C DMW-4 CCR-122RB ,• ® ',� AREA 4 CCR-122RC • MW-12R AREA 1A • i, �' SMW-1B MW-23B •`� � SMW-1C �MW-23C • � ' CCR-124RB AW-4B AW-4C CCR-124RC MW-22B FPA-9B FPA-49 " FPA-9C MW-21C `® FPA-3C MW-28C • MW-7B _ .. MW-7C • GRAPHIC SCALE 500 0 500 1,000 ESUKE RGY N IN FEET) PROGRESS DRAWN BY: J. KIRTZ DATE: 11/15/2019 REVISED BY: C. CURRIER CHECKED BY: H. SHARITT DATE: 07/30/2020 DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 �. T .�....� PROJECT MANAGER: B. WYLIE FIGURE 5-18 CONCEPTUAL CONFIRMATION MONITORING WELL NETWORK - ALTERNATIVES 1 & 2 1971/1984 ASH BASIN AND FPA CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA - MW-40 MW-40C CCR-114B • • POND CCR-114C (SUTTON CCR-113B CCR-113C PROPOSED RESTRICTED GROUNDWATER CCR-112B USE AREA. GROUNDWATER USE IS AUTOMATICALLY RESTRICTED IN AREAS CCR-112C CONTAINED WITHIN ACOMPLIANCE BOUNDARY. THE NPDES PERMITTED COOLING POND DOES NOT HAVE CCR-111 B COMPLIANCE BOUNDARY. A RESTRICTED USE DESIGNATION IS PROPOSED FOR THE CCR-111 C SMALL AREA BENEATH THE COOLING POND WHERE PREDICTIVE MODELING INDICATES COI CONCENTRATIONS IN GROUNDWATER MAY BE GREATER THAN APPLICABLE CCR-110B CRITERIA. THE PROPOSED DESIGNATION CCR-110C WOULD PREVENT PUBLIC USE OF GROUNDWATER. ADDITIONAL INSTITUTIONAL CONTROLS INCLUDING RESTRICTED CCR-109B ACCESS AND APPROPRIATE PERSONAL �/ PROTECTIVE EQUIPMENT MAYALSO BE CCR-109C APPLIED. CCR-108RB LEGEND WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE WATER SUPPLY WELL EXTRACTION WELL ANTICIPATED EFFLUENT CANAL EXTENSION COMBINED SIMULATED BORON AND SELENIUM 02L PLUME RESTRICTED GROUNDWATER USE DESIGNATION LIMIT ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION NOTES 1. THE PROPOSED RESTRICTED GROUNDWATER USE DESIGNATION IS DRAWN AT THE LEADING DOWNGRADIENT EDGE WHERE PREDICTED ONSITE COI CONCENTRATIONS ARE GREATER THAN COMPARISON CRITERIA. 2. CALIBRATION OF THE COMBINED 02L PLUME CAN BE FOUND IN THE UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA (FALTA, GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU,2020). 3. SEE APPENDIX P FOR MORE DETAILED INFORMATION RELATED TO EFFECTIVENESS MONITORING PLAN (EMP) ELEMENTS FOR THE 1971 & 1984 ASH BASINS AND FPA. MONITORING WELLS SHOWN ON THIS FIGURE ARE PLANNED TO BE SAMPLED AS PART OF THE EMP. 4. CCP - COAL COMBUSTION PRODUCTS 5. NPDES - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM. 6. COI - CONSTITUENT OF INTEREST. 7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 8. ALL BOUNDARIES ARE APPROXIMATE. 9. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 10. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). 1984 ASH BASIN (LINED) CCR-107R CCR-107R � r iff • ,Ilk F; j CCR-120C � SMW-6C �,� CCR-2047CDMW-4 b ME ml jCCR-122RB SMW-1 B ® CCR-122RC SMW-1C • • MW-23B � ♦ MW-23C AW-413♦� AW-4C j C CCR-124RB CCR-124RC , MW-22B (�- MW-22C • • FPA-4B FPA-9B FPA-4C � FPA-9C MW-21C B 1 JFORMER"i 4NA4 (' DUKE ENERGY PROGRESS GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: J. KIRTZ DATE: 06/01/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: H. SHARITT DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE FIGURE 5-19 REMEDIAL ALTERNATIVE 2 CONFIRMATION MONITORING WITH RS DESIGNATION SOURCE AREA 1 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA � • � a ell e �► of • e '� 1' � rt ! e .. r r ♦ � ♦ Frw • - w w^ y, COOLING. . �•COOLING POND �• t — (LAKE SUTTON) �• (LAKE SUTTON) •- •_ • • •- 2 i DISPOSAL ' ICAPE FEAR • • C ♦ �. ICAPE FEAR•* C RIVER INTAKE CANAL COAL PILE� a F-1 BASIN:. ♦ `. COOLING• • • •• • ►il • (LAKE SUTTON) ♦ e 1, e v ., s... GRAPHIC SCALE 970 0 970 1,940 FEET) �� DUnC (IN ENERGY DRAWN BY: R. KIEKHAEFER DATE: 05/22/2020 BORON 700 - 4,000 IJg/L 1. FPA- FORMER PROCESS AREA PROGRESS ASH BASIN WASTE BOUNDARY 2. FCPA- FORMER COAL PILE AREA REVISED BY: C. CURRIER DATE: 07/27/2020 ■ ASH BASIN COMPLIANCE BOUNDARY 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. CHECKED BY: H. SHARITT DATE: 07/27/2020 APPROVED BY: B. WYLIE DATE: 07/27/2020 ONSITE LANDFILL BOUNDARY 4. CCP -COAL COMBUSTION PRODUCTS PROJECT MANAGER: B. WYLIE synTerra www. syn to rra c o r p. c o m FORMER ASH DISPOSAL AREA WASTE BOUNDAR FPA BOUNDARY 5. ALL BOUNDARIES ARE APPROXIMATE. FCPA BOUNDARY 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. EFFLUENT DISCHARGE CANAL 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH DUKE ENERGY PROGRESS PROPERTY LINE CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). - • a a • - r / / ram/ •I �.. / r •�.. ♦ a I a • a�EXTENSIONsCOOLING y, POND (LAKE SUTTON) • a FORMERASi DISPOSAL CAPE FEAR r /RIVER`��. • rRIVER- CAPE FEAR tjj� FORMER / • "� • / CANAL A C' /•�INTAKE •a• Nwo I ` I ♦ a OWL �., _• a _. ♦ COOLING• . • • •• • ♦ 11 ♦ s 1 fit` - - r �, ♦ ♦ a Qe a GRAPHIC SCALE 970 0 970 1,940 FEET) �� DUnC (IN ENERGY DRAWN BY: R. KIEKHAEFER DATE:05/22/2020 SELENIUM 20 - 139 pg/L 1. FPA- FORMER PROCESS AREA PROGRESS ASH BASIN WASTE BOUNDARY 2. FCPA -FORMER COAL PILE AREA REVISED BY: C. CURRIER DATE: 07/27/2020 ■ ASH BASIN COMPLIANCE BOUNDARY 3. CCP- COAL COMBUSTION PRODUCTS CHECKED BY: H. TT APPROVED BY: B..WYLIYLIE DATE: 07/27/2020 DATE: 07/27/2020 ONSITE LANDFILL BOUNDARY 4. PROPERTY BOUNDARY PROVIDED BY PROGRESS. DUKE ENERGY PROJECT MANAGER: B. WYLIE synTerrd www.synterraoorp.com FORMERASH DISPOSAL AREA WASTE BOUNDARY FPA BOUNDARY 5. ALL BOUNDARIES ARE APPROXIMATE. FCPA BOUNDARY 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. EFFLUENT DISCHARGE CANAL 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH ■ DUKE ENERGY PROGRESS PROPERTY LINE CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). INCDEQapproves CAP (90 days)** Implement EMP (30 days)* Collect EMP data (1825 days) Prepare 5-year Effectiveness Monitoring Report (180 days) Notes: - Implement the Effectiveness Monitoring Plan to fulfill section G.S.130A-309.209.(b)(3). ** - Actual time may vary due to a variety of factors including agency review and approvals, weather delays, equipment availability, etc. Days 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 f`�/DUKE DRAWN BY: T.COLTON DATE 5/21/2020 1 ENERGY REVISED BY: T. COLTON CHECKED BY: H. SHARITT PROGRESS APPROVED BY: J. CLEMMER 10 PROJECT MANAGER: B. WYLIE 'Y1 literri a www.synterracorp.com FIGURE 5-22 IMPLEMENTATION GANTT CHART - SOURCE AREA 1 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA Note: *sampling events prior to 1/1/2018 FADA Wells ■ ABMW-02D 0 MW-45B • MW-13R o MW-45C A MW-13RD O MW-47B ♦ MW-15 x MW-47C ♦ MW-15D Y`s MW-48B z MW-15RD MW-48C MW-15RC MW-49B Fi MW-16 MW-49C O MW-16D Background Wells Ash Pore Water Wells ■ MW-05B AMBW-01S* • MW-05C AMBW-02S A, MW-08 V MW-08B MW-37B z MW-37C * MW-41B o 80% dx �O� d 80% FADA/ Former Coal Pile Wells Former Coal Pile Wells oo A V MW-20 �� ' � • MW-20D • MW-43C �'60% rV60% p A MW_46B ♦ MW-44B MW-44C , off° ai �D goo ❑ , ♦ MW 46C 40% 0% ♦ MW-50B ■ oho moo° z M W-50C 20% * � o { F79 20% It ❑ ry 6' z7 N o ° a o n o �—Ca Cl —� Notes: Groundwater data collected Ql 2020 (February unless noted with (*). ('DUKE DRAWN BY: M. GUNN DATE: 5/5/2020 FIGURE 5-23 valid Ash porewater groundwater data is most recent valid sample. ENERGY REVISED BY: FADA AND FORMER COAL PILE PROGRESS CHECKED BY: T. HARTMAN DATE: 5/7/2020 GROUNDWATER QUALITY PIPER APPROVED BY: L. DRAGO DATE: 5/7/2020 DIAGRAMS "' CORRECTIVE ACTION PLAN UPDATE ! PROJECT MANAGER: B. WYLIE L.V. SUTTON ENERGY COMPLEX ..synterracorp.com synTena WILMINGTON, NORTH CAROLINA E:l IR ,y CCP LANDFILL 1984 ASH�� BASIN (LINED) 1984 ASH BASIN (LINED) � 1971 ASH BASIN 1983 li. EXTENSION FORMER -� FORMER ASH i PROCESS AREA DISPOSAL AREA • ;Yll�flff •• e E L i FORMER •• COAL PILE - CAPE FEAR RIVER - - •• • oo INTAKE CANAL ';;. i l• -- ir GRAPHIC SCALE DUKE 500 0 500 1,000 FIGURE 5-24a <CnENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 2 PROGRESS DRAWN BY:C.WYATT DATE:05/01/2020 ARSENIC IN UPPER SURFICIAL FLOW ZONE REVISED BY: C. CURRIER DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE - CHECKED BY:T.HARTMAN L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE WILMINGTON, NORTH CAROLINA synTerra PROJECT MANAGER: B. WYLIE www.synterraoorp.com ♦♦ NOTES: l `♦ ♦ - TABLE 5-12 ,y CCP w �� LANDFILL 18��`L\ BASIN (LINED) t f�1 lry 1984 ASH l / BASIN (LINED) � I ASH BASIN 1983 ` COOLING POND EXTENSION' (LAKE SUTTON) - A� �. - t ` FORMERASH , PROCESS AREA I�► �) DISPOSAL ARE EFFLUEN 1 i� FORME COAL PILE - �� CAPE FEAR � RIVER M1 romT.-I-IRWO1 " INTAKE CANAL . ! - a ►- . t : 11 \ b TABLE 5-12 GRAPHIC SCALE DUKE 500 0 500 1,o00 FIGURE 5-24b ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 2 PROGRESS DRAWN Br. C.WYATT DATE:05/01/2020 ARSENIC IN LOWER SURFICIAL FLOW ZONE — REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY:T. HARTMAN CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX APPROVED BY: B.WYLIE WILMINGTON, NORTH CAROLINA synTerra PROJECT MANAGER: B. WYLIE www.synterracorp.com E:l 0 ,y CCP LANDFILL 1984 ASH�� BASIN (LINED) 1984 ASH BASIN (LINED) � 1971 ASH BASIN li. _ ,1983 ,I EXTENSION _ - FORMER - FORMER ASH �`- i' PROCESS AREA DISPOSAL AREA i FORMER CAPE FEAR COAL PILE - RIVER � ' i� INTAKE CANAL i �11 GRAPHIC SCALE DUKE 500 0 500 1,000 FIGURE 5-25a ENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 2 PROGRESS DRAWN BY:C.WYATT DATE:05/01/2020 BORON IN UPPER SURFICIAL FLOW ZONE REVISED BY: C. CURRIER DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE CHECKED BY:T. HARTMAN L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE WILMINGTON, NORTH CAROLINA �. T .�....� PROJECT MANAGER: B. WYLIE TABLE 5-12 NOTES E-1 TABLE 5-12 r� rr 0000, LEGEND 00 lie lie A OUTFALL 001 4W O Moak GRAPHIC SCALE I& DUKE 500 0 500 1,000 FIGURE 5-25b APENERGY (IN FEET) ISOCONCENTRATION MAP - SOURCE AREA 2 PROGRESS DRAWN BY.C. WYATT DATE: 05/01/2020 BORON IN LOWER SU RFICIAL FLOW ZONE REVISED BY. C. CURRIER DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE CHECKED BY.T. HARTMAN L.V. SUTTON ENERGY COMPLEX APPROVED BY: B. WYLIE WILMINGTON, NORTH CAROLINA synTerra PROJECT MANAGER: B. WYLIE www.synterracorp.com FORMER COAL FORMER ASH DISPOSAL AREA PILE AREA (NORTH) (FADA) (FCPA) (SOUTH) o FORMER w O 0 ASH EXTENT / 100 Q _> m U m 00 N N co U m U o 100 U) W O O �> Q m II J m m ~ ¢ < ~ > Q O w 50 w W J 50 J Q Yw Q J_ w U MW-49B B 1 207 Z Q ---__-'-`" Q O O TW-L098'TW-L024 -46B B <50 MW-43B B 59 > B NC B NC > MW-49C MW-4 MW-43C LLJ WI B 1 814 B 1075 B 145 W -50 ABM 751 UPPER SURFICIAL -50 ZONE WITH SILTS & SANDS UPPER PEEDEE FORMATION LOWER SURFICIAL ZONES OF SILTS AND FINE SANDS ZONE WITH COURSE -100 SANDS & SILT -100 LOWER PEEDEE FORMATION -150 ZONES OF SILTS AND FINE SANDS -150 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-12 FOR THE FULL DATASET. 6. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 7. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-12). LEGEND 8. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. MW 46B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER 9. CTV - CENTRAL TENDENCY VALUE. MW 46C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION MW 46D WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER 10. <- LESS THAN WELL WATER LEVEL ELEVATION ABMW 2S WELL ABANDONED UPPER PEEDEE FLOW ZONE GROUNDWATER ANALYTICAL PARAMETER B WELL WATER LEVEL ELEVATION REPORTING UNITS Ng/L GENERALIZED WATER TABLE 15A NCAC 02L STANDARD 700 BMW-43B9 BORON (B) CONCENTRATION (ug/L) BACKGROUND THRESHOLD VALUE 50 SURFACE WATER (SURFICIAL UPPER FLOW ZONE)+ LOWER SURFICIAL WELL SCREEN BACKGROUND THRESHOLD VALUE 50 (SURFICIAL LOWER FLOW ZONE)+ 0 PEEDEE FLOW ZONE ASH BASIN COMPLIANCE BOUNDARY +- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM (PEEDEE FORMATION) BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. NC NOT CALCULATED _ _ , „ n 19.11 grin snn CROSS SECTION LOCATION Ic (SOUTHWEST) D' FORMERASH (NORTHEAST) DISPOSAL AREA (FADA) 0 J C6 w O ZII 0W 100 Of �>Jio ¢ 2> O CO CO (D Lo Lo� > COU JN I� Fw Q II F J 50 U- J w ww �Q Q J LL Z U� 1 wU H MW-20 MW-46B MW-16 > B <50 B <50 B 57 B 52 w MW-20D B W-1 RBMW-16D w MW-45C B O 166 B 1 575 -50 B 1194 MW-46C MW-15RC \ UPPER SURFICIAL ZONE UPPER B 075 B 454 WITH SILTS & SANDS PEEDEE UPPER PEEDEE FORMATION 100 ZONES OF SILTS AND FINE SANDS ____ LOWER SURFICIAL _____ ZONE WITH COURSE SANDS & SILT LOWER PEEDEE FORMATION -150 ZONES OF SILTS AND FINE SANDS 100 50 z 0 LD Q w w -50 -100 -150 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-12 FOR THE FULL DATASET. 6. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). 7. NC - ANALYTICAL DATA DID NOT MEET CRITERIA TO CALCULATE AN LCL95 OR CTV VALUE (SEE TABLE 5-12). LEGEND 8. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. MW 46B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER MW 46C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION 9. CTV - CENTRAL TENDENCY VALUE. MW 15RD WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER 10. < THAN WELL WATER LEVEL ELEVATION -LESS — — GENERALIZED WATER TABLE UPPER PEEDEE FLOW ZONE GROUNDWATER ANALYTICAL PARAMETER B GENERALIZED GROUNDWATER WELL WATER LEVEL ELEVATION REPORTING UNITS pg/L FLOW DIRECTION MW-45B BORON (B) CONCENTRATION (Ng/L) 15A NCAC 02L STANDARD 700 SURFACE WATER B 52 BACKGROUND THRESHOLD VALUE 50 (SURFICIAL UPPER FLOW O 4 LOWER SURFICIAL WELL SCREEN BACKGROUND THRESHOLD VALUE 50 PEEDEE FLOW ZONE (SURFICIAL LOWER FLOW ZONE)+ (PEEDEE FORMATION) ASH BASIN COMPLIANCE BOUNDARY +- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION C (NORTH) w� C0 06 100 = U Lu W F J 50 w LL J Z lL < w U Z - O 0 rF < JW FORMER ASH DISPOSAL AREA FORMER COAL PILE AREA (FCPA) (FADA) FORMER ASH EXTENT N (N / OGD �j O cfl CO (O M Q < 1_ / T -50 1 V 1 0.41 1 1 V 1 0.47 1 UPPER SURFICIAL ZONE WITH SILTS & SANDS UPPER PEEDEE FORMATION LOWER SURFICIAL ZONES OF SILTS AND FINE SANDS ZONE WITH COURSE -100 SANDS & SILT co (SOUTH) 100 50 r 0 L) -50 100 LOWER PEEDEE FORMATION -150 1 ZONES OF SILTS AND FINE SANDS -150 LEGEND MW 46B WELL IN UPPER SURFICIAL FLOW ZONE MW 46C WELL IN LOWER SURFICIAL FLOW ZONE MW 46D WELL IN UPPER PEEDEE FLOW ZONE ABMW 2S WELL ABANDONED GENERALIZED WATER TABLE SURFACE WATER LOWER SURFICIAL PEEDEE FLOW ZONE 0 (PEEDEE FORMATION) Q W W NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-12 FOR THE FULL DATASET. 4. ARSENIC (As) AND VANADIUM (V) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). UPPER SURFICIAL FLOW ZONE GROUNDWATER 5. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. WELL WATER LEVEL ELEVATION 6. CTV - CENTRAL TENDENCY VALUE. V LOWER SURFICIAL FLOW ZONE GROUNDWATER WELL WATER LEVEL ELEVATION ANALYTICAL PARAMETER As v — UPPER PEEDEE FLOW ZONE GROUNDWATER REPORTING UNITS Ng/L ug/L WELL WATER LEVEL ELEVATION 15A NCAC 02L STANDARD 10 0.3' BACKGROUND THRESHOLD VALUE MW-4 B ARSENIC (As) CONCENTRATION (ug/L) (SURFICIAL UPPER FLOW ZONE) + 2.0 2.0 As 32 VANADIUM (V) CONCENTRATION (Ng/L) BACKGROUND THRESHOLD VALUE (SURFICIAL LOWER FLOW ZONE) + 14 2.0 5 WELL SCREEN `- 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 ASH BASIN COMPLIANCE BOUNDARY GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION Ic (SOUTHWEST) D' FORMERASH (NORTHEAST) DISPOSAL AREA (FADA) 0 J C6 W O Z0 W 100 Of II i �>Jip 2i ?i ¢2 100 > O CO (O (O Lo Lo� > COU JN Of — FW Q F J 50 u- J w 50 ww Q Q J LL Z U > i LL Q Z > W O Z O Q _ _ — — MW-20 MW-46B — — — MW-16 0 O < As <1.0 As 2.2 As 1.4 Q > As <1.0 > 'w MW-2 D A W-1 RBs MW-16D w w MW-45C As 1 1.5 1 As I <1.0 w -50 As 19 MW-46 MW-1 R \ UPPER SURFICIAL ZONE -50 UPPER I As 1 1.4 As 1 WITH SILTS & SANDS PEEDEE UPPER PEEDEE FORMATION ZONES OF SILTS AND FINE SANDS -100 LOWER SURFICIAL_ _ _ _ -100 ZONE WITH COURSE SANDS &SILT LOWER PEEDEE FORMATION -150 ZONES OF SILTS AND FINE SANDS -150 NOTES 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON FEBRUARY 26 & 27, 2020. 2. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM 1988, (NAVD 88). 3. GROUNDWATER FLOW IS APPROXIMATELY NORTHEAST TO SOUTHWEST, PERPENDICULAR TO THE CROSS SECTION. 4. ALL BOUNDARIES ARE APPROXIMATE. 5. ALL CONCENTRATIONS SHOWN ARE EITHER LCL95s OR CTVs. REFER TO TABLE 5-12 FOR THE FULL DATASET. LEGEND 4. ARSENIC (As) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L). MW 46B WELL IN UPPER SURFICIAL FLOW ZONE UPPER SURFICIAL FLOW ZONE GROUNDWATER MW 46C WELL IN LOWER SURFICIAL FLOW ZONE WELL WATER LEVEL ELEVATION 5. LCL95 - 95% LOWER CONFIDENCE LIMIT VALUE. MW 15RD WELL IN UPPER PEEDEE FLOW ZONE LOWER SURFICIAL FLOW ZONE GROUNDWATER 6. CTV - CENTRAL TENDENCY VALUE. WELL WATER LEVEL ELEVATION — — GENERALIZED WATER TABLE UPPER PEEDEE FLOW ZONE GROUNDWATER ANALYTICAL PARAMETER As GENERALIZED GROUNDWATER WELL WATER LEVEL ELEVATION REPORTING UNITS Ng/L _� FLOW DIRECTION MW-45B ARSENIC (As) CONCENTRATION (Ng/L) 15A NCAC 02L STANDARD 10 As <1.0 BACKGROUND THRESHOLD VALUE 2.0 SURFACE WATER WELL SCREEN (SURFICIAL UPPER FLOW ZONE) + LOWER SURFICIAL BACKGROUND THRESHOLD VALUE 14 PEEDEE FLOW ZONE ASH BASIN COMPLIANCE BOUNDARY (SURFICIAL LOWER FLOW ZONE) + (PEEDEE FORMATION) +- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O10 TO SEPTEMBER 2019. CROSS SECTION LOCATION MW-16 MW-20co 400 75 300 N 90 W W d c o E Q 300 50 ca m 200 = m 60 1 �, 3 Space not used fn y o .� .W o U 200 C Q L m 0 25 100 Q 30 W Q I x W 100 0 0 0 m 0 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 Date Date MW-16D MW-20D 150 600 r r co co 75 300 a 100 c 0 400 C Q E N m 50 m o a LA 200 m x .� Space not used o 0 < c o p < L 50 m 0 200 L m� o Q Q W Q 25 a W 100 X W C % 0-1Q N l0 Qi 0 0 L Q 0 2016 2017 2018 2019 2020 2016 2017 2018 2019 2020 Date Date LEGEND NOTES lf DUKE DRAWN BY: K.MARSAC DATE:7120/2020 FIGURE5-28 Plots of arsenic (left y-axis) and EH (right y-axis) over time near Source pg/L - Micrograms per liter �� ENERGY REVISED BY: K. MARSAC TIME VERSUS CONCENTRATION Area 2 in the upper surficial flow zone to row and lower surficial flow Eh - Redox Potential Arsenic PROGRESS CHECKED BY: T. HARTMAN ARSENIC AND EH NEAR zone (bottom row). Dates of ash basin( excavation begins, extraction my - Millivolts APPROVED BY: B. WYUE SOURCE AREA 2 t EH system online, and ash basin excavation complete and FADA PROJECT MANAGER: B. WYLE CORRECTIVE ACTION PLAN UPDATE excavation start are marked with vertical lines. Refer to Table 2 of gynTena L.V. SUTTON ENERGY COMPLEX www.synterrecorp.com Appendix C for source data series. WILMINGTON, NORTH CAROLINA r a U C � m o 0 O LL m m U m � L W C O Q � W m LEGEND la WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE • SUPPLY WELL AREAS 3A- ONGOING CLOSURE ACTIVITIES AREA 3B - MNA REMEDY ANTICIPATED EFFLUENT CANAL EXTENSION - ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY - - ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY - DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION 1. SEE APPENDIX P FOR MORE DETAILED INFORMATION RELATED TO EFFECTIVENESS MONITORING PLANMP ELEMENTS FOR THE FADAAND FCPA. MONITORIN EWE LS SHOWN ON THIS FIGURE ARE PLANNED TO BE SAMPLED AS PART OF THE EMP. 2. THE OUTLINE OF AREAS 1A, 1 B, AND 4 REPRESENT THE AREAS WHERE THE MAXIMUM EXTENT OF COIS ARE GREATER THAN COMPARISON CRITERIA IN GROUNDWATER ASSOCIATED WITH THE SUTTON SOURCE AREAS. 3. CCP - COAL COMBUSTION PRODUCTS. 4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY ALL BOUNDARIES ARE APPROXIMATE. 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). 1984 ASH BASIN (LINED) AREA 3A-ING POND TON LAKE) r I� fDISPFORMERASH • MW-16 MW-16D MW-46B MW-15R-B MW-20 MW-46C MW-45B MW-15R-C MW-20D MW-45C lip '' �NMW-50B MW-44B M W-44C M W-50C MW-43B MW-43C OUTFALL 001 (' DUKE ENERGY PROGRESS I;j ♦ � ^ w L ' ♦ _ r a..rr. . GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: J. KIRTZ DATE: 05/22/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: H. SHARITT DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE • FIGURE 5-29 CONCEPTUAL MNA WELL NETWORK ALTERNATIVES 1 & 2 FADA AND FCPA CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA 0 LEGEND WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE • SUPPLYWELL ANTICIPATED EFFLUENT CANAL EXTENSION COMBINED SIMULATED BORON AND SELENIUM 0 02L PLUME RESTRICTED GROUNDWATER USE DESIGNATION LIMIT + ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY + ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION 1984 ASH BASIN (LINED) 1971 ASH BASIL I ♦ r A♦ �Y♦ MW-46B MW-15R-B �e. MW-20 MW-46C Mw--457%� MW-20D MW-15R-C MW-45C MW-44B MW-50B M W-44C M W-50C ♦ � MW-43B MW-43C OUTFACE 001 1. THE PROPOSED RESTRICTED GROUNDWATER USE ` DESIGNATION IS DRAWN AT THE LEADING DOWNGRADIENT EDGE WHERE PREDICTED ONSITE COI CONCENTRATIONS ARE GREATER THAN COMPARISON CRITERIA. 2. CALIBRATION OF THE COMBINED 02L PLUME CAN BE FOUND IN THE UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA (FALTA, GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2020). 3. SEE APPENDIX P FOR MORE DETAILED INFORMATION SHOWN ON THIS FIGURE ARE PLANNED TO BE SAMPLED AS PART OF THE EMP. 4. CCP - COAL COMBUSTION PRODUCTS. 5. FADA- FORMER ASH DISPOSALAREA. 6. FCPA- FORMER COAL PILE AREA. DUKE 7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY �' E N E RGY PROGRESS. 8. ALL BOUNDARIES ARE APPROXIMATE. PROGRESS 9. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. �� 10. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). synTerrd GRAPHIC SCALE 500 0 500 1,000 (IN FEET) DRAWN BY: J. KIRTZ DATE: 06/01/2020 REVISED BY: C. CURRIER DATE: 07/30/2020 CHECKED BY: H. SHARITT DATE: 07/30/2020 APPROVED BY: B. WYLIE DATE: 07/30/2020 PROJECT MANAGER: B. WYLIE PROPOSED RESTRICTED GROUNDWATER USE AREA. GROUNDWATER USE IS AUTOMATICALLY RESTRICTED IN AREAS CONTAINED WITHIN A COMPLIANCE BOUNDARY. BECAUSE THE FADAAND FCPA DO NOT HAVEA COMPLIANCE BOUNDARY, A RESTRICTED USE DESIGNATION IS PROPOSED. THE PROPOSED DESIGNATION WOULD PREVENT PUBLIC USE OF GROUNDWATER. ADDITIONAL INSTITUTIONAL CONTROLS INCLUDING RESTRICTED ACCESS AND APPROPRIATE PERSONAL PROTECTIVE EQUIPMENT MAY ALSO BE APPLIED. FIGURE 5-30 REMEDIAL ALTERNATIVE 2 MNA WITH RS DESIGNATION SOURCE AREA 2 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA NCDEQapproves CAP (90 days)** Implement EMP (30 days)* Collect EMP data (1825 days) Prepare 5-year Effectiveness Monitoring Report (180 days) Notes: Implement the Effectiveness Monitoring Plan to fulfill section G.S.130A-309.209.(b)(3). ** - Actual time may vary due to a variety of factors including agency review and approvals, weather delays, equipment availability, etc. Days 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 DUKE DRAWN BY: T.COLTON DATE:5/21/2020 `% l /ENERGY REVISED BY: T. COLTON CHECKED BY: H. SHARITT PROGRESS APPROVED BY: J. CLEMMER 10 PROJECT MANAGER: B. WYLIE 'Y1 literri a www.synterracorp.com FIGURE 5-31 IMPLEMENTATION GANTT CHART - SOURCE AREA 2 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, NORTH CAROLINA MW-41B MW-41C SW-2 r 6.—.—d LEGEND WELL IN UPPER SURFICIAL FLOW ZONE WELL IN LOWER SURFICIAL FLOW ZONE ■ SURFACE WATER SAMPLE LOCATION (APPROXIMATE) EXTRACTION WELL • SUPPLY WELL ANTICIPATED EFFLUENT CANAL EXTENSION -4EFFECTIVENESS MONITORING FLOW PATH - ASH BASIN COMPLIANCE BOUNDARY ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY - — ONSITE LANDFILL COMPLIANCE BOUNDARY FORMER ASH DISPOSAL AREA WASTE BOUNDARY FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY - DUKE ENERGY PROGRESS PROPERTY LINE EFFLUENT DISCHARGE CANAL SURFACE WATER FLOW DIRECTION GROUNDWATER FLOW DIRECTION AREAS 1A/1B/4 -CONFIRMATION GROUNDWATER MONITORING _ AREAS 2/3A- ONGOING CLOSURE ACTIVITIES r1 AREA 3B - MNA REMEDY APPROXIMATE HYDROLOGIC DIVIDE 1. SEE APPENDIX P FOR MORE DETAILED INFORMATION RELATED TO EFFECTIVENESS MONITORING PLAN (EMP) ELEMENTS FOR THE ASH BASINS, FADA, FPA, AND FCPA. MONITORING WELLS SHOWN ON THIS FIGURE ARE PLANNED TO BE SAMPLED AS PART OF THE EMP. 2. THE OUTLINE OF AREAS 1A, 1 B, 2, 3A, 3B AND 4 REPRESENT THE AREAS WHERE THE MAXIMUM EXTENT OF COIS ARE GREATER THAN COMPARISON CRITERIA IN GROUNDWATER ASSOCIATED WITH THE SUTTON SOURCE CCP - COAL COMBUSTION PRODUCTS. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY 5. ALL BOUNDARIES ARE APPROXIMATE 6. AERIAL PHOTOGRAPHY OBTAINED FROM TERRA SERVER ON JUNE 17, 2019. IMAGE COLLECTED APRIL 4, 2019. 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). MW-08B M W-8 0 4-�A'q • MW-5B ♦ � _ MW-5C ♦ 10 • • • AREA 4 SMW-1 B • SMW-1C • • • • - ems+ ..: • AREA 3A A-3B • MW-21C - - • FPMW-28B ` - • - • $ • COOLIgWKE NG POND SW 9 • FPA-3C ♦ �: DISPOSAL MW-16 • MW-16D AREA 1A IA Irk MW�6C MW-15R-B MW-7C +' MW-15R-C _ - CAPE FEAR MW-20D MW 446 MW-50BRIVER — - - -44C iii��► MW-50C � - - � - - ♦ % MW-43B MINTAKE CAA&' W-43C AREA 3B / MW-37B �� MW-37C � ♦ s , dN ('DUKE GRAPHIC SCALE FIGURE 5-32 500 0 500 1,000 EFFECTIVENESS MONITORING PROGRAM ENERGY (IN FEET) SYSTEMS AND FLOW PATHS PROGRESS DRAWN BY: J.KIRTZ DATE:11/15/2019 ALTERNATIVES 1 & 2 REVISED BY: C. CURRIER DATE: 07/30/2020 SOURCE AREAS 1 &2 CHECKED BY: H. SHARITT DATE: 07/30/2020 CORRECTIVE ACTION PLAN UPDATE APPROVED BY: B. WYLIE DATE: 07/30/2020 L.V. BUTTON ENERGY COMPLEX synTerra PROJECT MANAGER: B. WYLIE WILMINGTON, NORTH CAROLINA www.synterraoorp.com MW-27B MW-27C ` • � MW-40B SW-3 MW-40C AREA CCR-114B CCR-114C CCR-113B l , ♦l CCR-113C , � CCR-112B ` CCR-112C ® CCR-119B CCR-119C CCR-111 B �SW-4 �� . CCR-120B CCR-111C � CCR-120C SW-5 CCR-110C CCR-122RB CCR-109B CCR-122RC , CCR-109C �'�+ MW 12RAW-6RB SW-6 �` � CCR-108RB MW-23B, `� CCR-108RC MW-23C � . � • , CCR-107RB r CCR-107RC CCR-124RB �� , ® AW-4C SW-7 CCR-124RC `- MW-22C AREA 2 FPA-4B � FPA-4C n SW-8 I FPA-9B ` F FPA-9C ♦ MW-8/B/D � ♦4. MW-41 B/C/D ♦ : qld DMW-1 CCR-208C/D ® ♦[BMW-1 ' CCR-115B/C/D CCR-201C/D" CCR-114B/C/D � DMW 2 ♦ �'� i CCR-117B/C ® CCR-207C/D CCR-113B/C/D ® � BMW-3 CCR-112B/C/D CCR-111 B/C/D e CCR-110B/C/D CCR-118B/C ®BMW-2 CCR-206C/D 1984ASH �G BASIN (LINED) • CCR-109B/C/D �/ CCR-108RB/RC/RD CCR-108B/C/D CCR-107R6/RC/RD CCR-107B/C/D CCR-106B/C/D CCR-105B/C/D CCR-104B/C/D CCR-10 ♦ M, y BMW-4 � CCR-203C/D ® CCR-205C/D DMW-3 �CCR-1216/C ♦CCR-204C/D CCR-121R - CR-122& ®' CCR-122R CR-123B/C ♦` LEGEND CCR RULE DETECTION MONITORING WELL �♦ • CCR RULE BACKGROUND MONITORING •� WELL ABANDONED DETECTION MONITORING♦` WELL • REPLACEMENT DETECTION MONITORING RIVER ♦♦ WELL I ANTICIPATED AREA OF COOLING POND EXTENSION ASH BASIN WASTE BOUNDARY ONSITE LANDFILL BOUNDARY FORMER ASH DISPOSALAREABOUNDARY Al FORMER PROCESS AREA BOUNDARY FORMER COAL PILE AREA BOUNDARY EFFLUENT DISCHARGE CANAL DUKE ENERGY PROGRESS PROPERTY LINE NOTES: 1. W.E. - WATER ELEVATION (APPROXIMATE) 2. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY PROGRESS. 3. ALL BOUNDARIES ARE APPROXIMATE. 4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON SEPTEMBER 12, 2017. IMAGE COLLECTED OCTOBER 29, 2016. 5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 (NAD83/2011). CCR-124R E. GRAPHIC SCALE UKE 500 0 500 1,000 �' ESN RGY N FEET) PROGRESS DRAWN BY: J. KIRTZ DATE: 05/26/2020 REVISED BY: C. CURRIER CHECKED BY: H. SHARITT DATE: 07/27/2020 DATE: 07/27/2020 APPROVED BY: B. WYLIE DATE: 07/27/2020 �. T .�....� PROJECT MANAGER: B. WYLIE FIGURE 5-33 FEDERAL REGULATORY GROUNDWATER MONITORING SOURCE AREAS 1&2 CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX Interim Monitoring Plan Corrective Action (IMP) sampling Y_ Plan Approval Post -Excavation 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 aDDlicable Standards No Continue EMP sampling and Annual Review and Reporting Based on Are the groundwater Based on annual evaluation, Yes monitoring results Yes annual evaluation, No is the remedial below applicable is the plume stable system performance standards at the at the compliance effective? compliance boundary boundary? for three years? No Adjust remedial system components; continue with EMP for additional four years then If ineffective after 5 years, implement contingency plan in accordance with CAP Update Section 5.13; continue with EMP Notes: NCAC - North Carolina Administrative Code 02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and Standards 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 DUKE DRAWN BY: T. PLATING DATE: 10/112019 ENERGY REVISED BY: B. WYLIE DATE: 6/10/2020 PROGRESS CHECKED BY: T. HARTMAN DATE: 6/20/2020 APPROVED BY: B. WYLIE DATE: 6/20/2020 PROJECT MANAGER: B. WYLIE www.synterracorp.com WnTerm FIGURE 5-34 EFFECTIVENESS MONITORING PLAN WORK FLOW AND OPTIMIZATION FLOW DIAGRAM CORRECTIVE ACTION PLAN UPDATE L.V. SUTTON ENERGY COMPLEX WILMINGTON, 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 planit reduction of constituents Has the site Termination location of no le • Constituents have not and been identified authorized after health than one year' will not migrate onto for resource and safety predicted time adjacent properties development. analysis travel upgradienGW discharge to surface any existing owater will not violate 02B foreseeable rece 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 applicable criteria from multiple sampling events? No further action