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Home My WebLink AboutNC0005088_SOC WQ S17-009_20200423 fetN DUKE RECEIVED James Wells Vice President ENERGY. Environmental,Health and Safety MAY 012020 Programs&Environmental Sciences 526 South Church Street Charlotte,NC 28202 NCDEQIDWRINPDES (980)373 9646 April 23, 2020 Via Overnight Mail Landon Davidson Asheville Regional Office Regional Supervisor North Carolina Department of Environmental Quality Division of Water Resources Water Resources - Water Quality Regional Operations 2090 U.S. 70 Highway Swannanoa, NC 28778-8211 Bob Sledge North Carolina Department of Environmental Quality Water Quality Permitting Program Division of Water Resources 1617 Mail Service Center Raleigh, NC 27699-1617 Subject: Report Under Special Order by Consent—EMC SOC WQ S 17-009 Duke Energy Carolinas, LLC— Rogers Energy Complex NPDES Permit NC0005088 2019 Annual Seep Survey Report Dear Messrs. Davidson and Sledge: On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Rogers Energy Complex Annual Seep Survey Report summarizing the findings of the comprehensive survey as required by the Rogers Energy Complex NPDES Permit NC0005088 Special Order by Consent (SOC), SOC No. S 17-009 Section 2.c.3). As required by the SOC,I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Messrs. Davidson and Sledge April 23, 2020 Page 2 Please direct any questions concerning the Rogers Energy Complex NPDES Permit NC0005088 SOC No. S 17-009 to Robert Wylie at (704) 382-4669 and to Chris Hallman at (980) 373-7892 relative to the annual seep inspection report. Sincerely, James is Vice President, Environment, Health & Safety- Programs and Environmental Sciences Duke Energy Attachment: Rogers Energy Complex 2019 Annual Seep Survey cc: Richard Baker, Duke Energy Robert Wylie, Duke Energy Chris Hallman, Duke Energy Steve Hodges, Duke Energy Paul Draovitch, Duke Energy Matt Hanchey, Duke Energy 46_ synTerra 2019 ANNUAL SEEP REPORT ROGERS ENERGY COMPLEX CLIFFSIDE STEAM STATION EMC SOC WQ S17-009 573 DUKE POWER ROAD MOORESBORO, NC 28114 APRIL 2020 PREPARED FOR toi DUKE ENERGY. CAROLINAS DUKE ENERGY CAROLINAS, LLC Tim Grant Project Scientist Scott Spinner, NC LG #2243 Project Manager 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas, LLC SynTerra TABLE OF CONTENTS SECTION PAGE 1.0 INTRODUCTION 1-1 1.1 Inspection Details 1-1 2.0 FINDINGS 2-1 2.1 General Observations 2-1 2.2 Effects of Decanting 2-1 2.3 Changes to Seep Status 2-1 3.0 REFERENCES 3-1 LIST OF FIGURES Figure 1 SOC Locations and Inspection Areas LIST OF TABLES Table 1 SOC Locations and Descriptions-2019 Inspection LIST OF APPENDICES Appendix A Photographs Page i 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra LIST OF ACRONYMS EMC Environmental Management Commission SOC Special Order by Consent Page ii 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra 1.0 INTRODUCTION On March 6-7, 2019, Scott Spinner (NC L.G. #2243) of SynTerra inspected the Cliffside Steam Station (Cliffside or Site) property for existing and potential new seeps. No changes to seep status were observed during this inspection. Two previously unidentified seeps were observed. Inspection activities were performed in accordance with North Carolina Environmental Management Commission (EMC) Special Order by Consent (SOC) EMC WQ #S17-009. That Special Order by Consent describes inspection requirements as follows: Duke Energy shall conduct annual comprehensive surveys of areas down gradient of ash basins identifying new seeps, and documenting the physical characteristics of previously documented seeps. All examinations ofseeps must include identification se s eP ePof seeps by approximate latitude and longitude and date-stamped digital photographs of their appearance. A report summarizing the findings of the surveys, including a section analyzing the effect decanting of the basin(s) has on seep flows, accompanied by copies of the photographs noted above ("Annual Seep Report"), shall be submitted to DWR in conjunction with submittal of the April 30 quarterly report noted in 2(c)(2) above. This Annual Seep Report must list any seep that has been dispositioned (as described below) during the previous year, including an analysis of the manner of disposition. All locations listed in Table 1 of the SOC were observed and documented with photographs during the inspection. General inspection observations include: • One previously unidentified seep (S-37) was observed during the inspection. • One previously unidentified seep (S-38) was observed on a follow-up visit after the annual inspection. • No notable changes to existing seep status were observed during this inspection. • Decanting of the active ash basin had not begun at the time of this inspection. 1.1 Inspection Details During the inspection, the weather was clear and no precipitation occurred. The most recent rain event was 0.7 inches on March 3, 2019, according to the on-Site rain gage. Temperatures ranged from approximately 40 to 55 degrees Fahrenheit(F). Page 1-1 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra The inspector reviewed previous seep inspection reports and the weekly dam safety inspection reports pertaining to each ash basin. Patrick Dunn (Duke Energy system owner) conducted the ash basin dam safety inspections and prepared the reports. Mr. Dunn was interviewed about recent rainfall, recent construction/stabilization projects associated with the ash basins, and general Site conditions in and surrounding the ash basins. Observations from the dam safety inspection reports were consistent with observations made during the annual inspection. The inspection included observations in the following areas (Figure 1): • Along the Broad River, north of the Unit 5 inactive ash basin • Between Unit 5 inactive ash basin and Unit 5 power plant • Along the Broad River, northeast of the former Units 1-4 ash basin • Along the Broad River, north of the ash storage area • Along the Broad River, north of the active ash basin • Along the eastern bank of Suck Creek, adjacent to the active ash basin • Areas along and downgradient of the ash basins Seep locations and inspection areas are shown on Figure 1. Observations noted during the inspection are summarized on Table 1. Photographs taken of each seep location during the inspection are included in Appendix A. Page 1-2 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra 2.0 FINDINGS 2.1 General Observations Inspection observations of each seep are described in Table 1. Details include: • Seep conditions were found to be generally similar to conditions in previous inspections. • Seeps S-37 and S-38 were identified as a part of the 2019 inspection and will be incorporated into the monitoring program. Both newly identified seeps exhibited insufficient flow to collect a sample. • No previously unidentified or unreported pipes were observed during inspection. 2.2 Effects of Decanting Decanting of the active ash basin at Cliffside had not yet begun at the time of this inspection. 2.3 Changes to Seep Status Mr. Spinner inspected each seep to evaluate whether it met requirements to be dispositioned in accordance with the SOC. The requirements for dispositioning a seep are as follows: For purposes of this Special Order, "dispositioned" includes the following: (1) the seep is dry for at least three consecutive quarters; (2) the seep does not constitute, and does not flow to, waters of the State or Waters of the United States for three consecutive quarters; (3) the seep is no longer impacted by flow from any coal ash basin as determined by the Director of DWR in accord with applicable law and best professional judgment; or (4) the seep has been otherwise eliminated (e.g., through an engineering solution). If a seep that has been dispositioned through drying up reappears in any subsequent survey, such a seep will no longer be deemed dispositioned and can be subsequently re-dispositioned as specified above. Non-constructed seeps described in paragraph 1(h) of this SOC cannot be dispositioned through option (2) above. No changes to seep status were observed during this inspection. Seeps S-37 and S-38 were identified as a part of the 2019 inspection and will be included in future inspections. Page 2-1 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra 3.0 REFERENCES NCDEQ. (2018). Special Order by Consent EMC SOC WQ S17-009. Page 3-1 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra FIGURES • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra TABLES TABLE 1 SOC LOCATIONS AND DESCRIPTIONS - 2019 INSPECTION 2019 ANNUAL SEEP REPORT ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC Location Coordinates_ Receiving Receiving Facility Sample ID Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection Latitude Longitude Classification Minor flow was located at bank of Broad River, Flow observed on bank entering Broad River. Flow Cliffside S-13** 35.218353 -81.754942 Broad River WS-IV adjacent to Unit 1-4 Inactive Ash Basin. NA - Seep Dispositioned NA - Seep Dispositioned rate at a trickle. Orange aerobic bacteria/floc/iron- Following ash basin excavation, seep has disappeared. oxidation apparent on substrate. Seepage located along toe of dike (west side) Cliffside S-14 35.214511 81.755844 Suck Creek WS-IV of the active ash basin. Area of wetness - no Suck Creek Instream NA 2B Standards Apply Pooled water by sign, but no flow toward Suck flowing water observed. Any flow would move Monitoring Creek. toward Suck Creek. Second seepage area located along toe of dike (west side) of the active ash basin. Area of Suck Creek Instream Wetter than previous inspections, flow in channel Cliffside S-15 35.214297 -81.756117 Suck Creek WS-IV wetness - no flowing water observed. Any flow Monitoring NA - 2B Standards Apply reaches Suck Creek. could move via poorly incised channel toward Suck Creek. Third seepage area located along toe of dike Steady flow within channel. Notable floc/iron- Cliffside S-16 35.2141 -81.756208 Suck Creek WS-IV (west side) of the active ash basin. Any minor Suck Creek Instream NA - 2B Standards Apply oxidizing bacteria on substrate. Flow continues flow could move via channelized area toward Monitoring toward Suck Creek. Suck Creek. Minor seep at river edge and below the Cliffside S-17** 35.217192 -81.769272 Broad River WS-IV ordinary high water level of Broad River, west NA - Seep Dispositioned NA - Seep Dispositioned Similar to previous inspections. Flow in three (upstream of S 2). separate channels enters the Broad River. Seepage from riprap at toe of inactive Unit 5 Orange aerobic bacteria/floc/iron-oxidation Cliffside S-18 35.216439 -81.768564 UT to Broad River WS-IV Ash Basin. Flows north into wetland area Monitoring at S-02 See S-02 apparent on substrate. Aquatic life monitoring site. PP q apparent in draining to sampling site S-2. stream. Slightly wetter than previous inspections. Seepage from wooded area at toe of inactive Orange aerobic bacteria/floc/iron-oxidation Cliffside S-19 35.216361 -81.768681 UT to Broad River WS-IV Unit 5 Ash Basin. Flows north into wetland area Monitoring at S-02 See S-02 apparent on substrate. More flow than previous draining to sampling site S-2. monitoring site. inspections. Seepage from wooded area at toe of inactive Orange aerobic bacteria/floc/iron-oxidation Cliffside S-19A 35.216581 -81.769217 Broad River WS-IV Unit 5 Ash Basin. Flows north into wetland area Monitoring at S-02 See S-02 apparent on substrate. Slightly more flow than monitoring site. draining to sampling site S-2. previous inspections. Stagnant AOW at toe of northeast side of Seep not visible in area of rip-rap repair. Water Cliffside S-20** 35.215856 -81.765217 Broad River WS-IV Inactive Unit 5 Ash Basin. AOW dispositioned NA - Seep Dispositioned NA - Seep Dispositioned exists in ditch farther downgradient near the via repair. cooling tower. Seep located along dike of the active ash basin Stagnant water that follows groin of upstream dam Cliffside S-21 35.214625 81.755953 Suck Creek WS-IV (west side). Area of wetness - no flowing Suck Creek Instream NA 2B Standards Apply and infiltrates prior to discharge into Suck Creek. water observed. Any flow would move toward Monitoring Traces of orange aerobic bacteria/floc/iron- Suck Creek. oxidation apparent on substrate. Cliffside S-22** 35.218278 -81.748258 WS-IV Pipe has been plugged; discharge eliminated. NA - Seep Dispositioned NA - Seep Dispositioned Pipe is plugged, no discharge. Page 2 of 4 TABLE 1 SOC LOCATIONS AND DESCRIPTIONS - 2019 INSPECTION 2019 ANNUAL SEEP REPORT ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC Location Coordinates Receiving Facility Sample ID Receiving Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection Latitude Longitude Waterbody Classification Seep to pooled area adjacent to the Broad River, located north of the active ash basin. Broad River Instream Ponded water present at seep emergence. Visible Cliffside S-23 35.217994 -81.750208 Broad River WS-IV Minor seepage from pool emerges with any Monitoring NA - 2B Standards Apply flows reaching Broad River. minor flow draining north to the Broad River. Cliffside S-24* 35.218139 -81.749428 Broad River WS-IV Minor seepage to AOW near bank of Broad NA - Seep Dispositioned NA - Seep Dispositioned Sandy and silty substrate. Stable with low flow to River and north of active basin. the river. Minor seepage to AOW below ash storage area. Cliffside S-25** 35.217689 -81.751894 Broad River WS-IV No measurable flow has been observed NA - Seep Dispositioned NA - Seep Dispositioned Similar to previous inspections. Trickle of flow to Broad River. throughout site history. Cliffside S-26* 35.217425 -81.753931 Suck Creek WS-IV Natural conveyance near bank of Suck Creek NA - Seep Dispositioned NA - Seep Dispositioned Sandy and silty substrate with rock outcrops. Flow near confluence with the Broad River. in channel entering Suck Creek. Seep located along dike of the active ash basin Cliffside S-27 35.21383 -81.756478 Suck Creek WS-IV (west side). Area of wetness no flowing Suck Creek Instream NA - 2B Standards Apply No flow or wetness observed. water observed. Any flow would move toward Monitoring Suck Creek. I Minor diffuse groundwater seepage along steep Suck Creek Instream Wetter than previous inspections. Orange aerobic Cliffside S-28 35.211677 -81.753876 Suck Creek WS-IV bank of Suck Creek, west of the active ash Monitoring NA - 2B Standards Apply bacteria/floc/iron-oxidation apparent on substrate. basin dike. Minor diffuse groundwater seepage along steep Suck Creek Instream Flow is low and clear. Orange aerobic Cliffside S-29 35.211542 -81.753993 Suck Creek WS-IV bank of Suck Creek, west of the active ash NA - 2B Standards Apply bacteria/floc/iron-oxidation apparent on substrate. Monitoring basin dike. Similar to previous inspections. Minor diffuse groundwater seepage along steep Suck Creek Instream Flow discharges across several areas toward Suck Cliffside S-30 35.211496 -81.75391 Suck Creek WS-IV bank of Suck Creek, west of the active ash NA - 2B Standards Apply Monitoring Creek over rocks and as drip faces along the bank. basin dike. Flow is trickling/dripping and clear. Orange aerobic Minor diffuse groundwater seepage along steep Suck Creek Instream bacteria/floc/iron-oxidation apparent on substrate. Cliffside S-31 35.211482 -81.753887 Suck Creek WS-IV bank of Suck Creek, west of the active ash NA - 2B Standards Apply Area is approximately 20 feet wide along bank and basin dike. Monitoring water trickles toward Suck Creek at several locations. Minor diffuse groundwater seepage along steep Flow is a trickle and clear. Orange aerobic Cliffside S-32 35.211258 -81.753646 Suck Creek WS-IV bank of Suck Creek, west of the active ash Suck Creek Instream NA - 2B Standards Apply bacteria/floc/iron-oxidation apparent on substrate. basin dike. Monitoring Area of diffuse flow approximately 30 feet wide flowing toward Suck Creek. Seep was located at bank of Broad River, Soft sediment at bank. Abandoned outfall gone. No Cliffside S-33** 35.218272 -81.754754 Broad River WS-IV adjacent to Unit 1-4 Inactive Ash Basin. NA - Seep Dispositioned NA - Seep Dispositioned flow. New outfall constructed for wastewater Following ash basin excavation, seep has treatment plant. disappeared. Sandy and silty substrate with rock outcrops. Flow Cliffside S-34* 35.217556 -81.753725 Suck Creek WS-IV Natural conveyance near bank of Suck Creek NA - Seep Dispositioned NA - Seep Dispositioned infiltrates prior to entering Suck Creek. No apparent iron-oxidizing bacteria observed. Page 3 of 4 TABLE 1 SOC LOCATIONS AND DESCRIPTIONS - 2019 INSPECTION 2019 ANNUAL SEEP REPORT ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC Location Coordinates Receiving Receiving Facility Sample ID Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection Latitude Longitude Classification Flow less than previously observed and infiltrates Cliffside S-35* 35.208203 -81.755703 Suck Creek WS-IV Natural conveyance near bank of Suck Creek NA - Seep Dispositioned NA - Seep Dispositioned prior to entering tributary. Sandy and silty with minor amounts of iron-oxidizing bacteria observed at the confluence of the tributary. Minor diffuse groundwater seepage along bank Cliffside S-36 35.210258 -81.753983 Suck Creek WS-IV of Suck Creek, west of the active ash basin Suck Creek Instream NA - 2B Standards Apply Steady trickle flow from three drip faces. dike. New area identified with no current data. Monitoring Area to be monitored to determined status. Seeps Discovered During 2019 Inspection Seep located approximately 20 feet downstream of S-36. Flow emerges 25 feet Suck Creek Instream Flow minor and diffuse. Notable iron staining and Cliffside S-37 35.210266 -81.753827 Suck Creek WS-IV from Suck Creek as standing water which Monitoring NA - 2B Standards Apply floc present. Insufficient volume to sample. becomes shallow, flowing, and somewhat diffuse as it flows toward Suck Creek. Seep emerges near the ordinary high water mark of the Broad River north of the active ash Broad River Instream Flow is low and not apparent when river levels are Cliffside S-38 35.217759 -81.752742 Broad River WS-IV basin. Flow is low and travels through multiple Monitoring NA - 2B Standards Apply high. Iron staining present on sandy substrate. channels in sandy shoreline substrate toward Insufficient volume to sample. the Broad River. NPDES locations Seepage from bank downgradient of active ash Steady flow consistently within a well-defined rip Outfall 104 NA - Monitored per terms rap channel. Silty and clayey sand beneath rip-rap. Cliffside (S 04) 35.217641 -81.752596 Broad River WS-IV basin to a channel flowing toward the Broad of the NPDES permit NA - 2B Standards Apply Orange aerobic bactera/floc/iron oxidizing bacteria River. apparent on rip-rap substrate along channel. Steady stream with moderate flow volume Steady moderate flow. Water is clear. Seepage within well-defined channel at toe drain for observed at toe of the dam at/near the rip-rap pile. Outfall 106 NA - Monitored per terms Cliffside (S-06) 35.21844 -81.748266 Broad River WS-IV active ash basin dam, downstream of former of the NPDES permit NA - 2B Standards Apply Vegetation conceals some flow. Orange aerobic AOW S-22 and bacterial/floc/iron-oxidation apparent on substrate near the confluence with the Broad River. along channel, especially apparent in eddies. Prepared by: KDF Checked by: GTC Notes: Revised by:TJG Checked by: SAS * -Location previously investigated as a seep. Monitoring has not indicated the presence of coal combustion residuals. **-Seep dispositioned via repair and/or non-flowing condition to potentially reach Waters of the U.S.,or other,as noted. Monitoring shall be conducted at the approximate locations indicated on the attached site map. All monitoring shall be conducted per the requirements found in Attachment B of this Order. pg/L-micrograms per liter 2B- 15A NCAC 02L.0202 Standard mg/L-milligrams per liter NA-Not Applicable NPDES-National Pollutant Discharge Elimination System S.U. -Standard Units SOC-Special Order by Consent TDS-Total Dissolved Solids UT-Unnamed Tributary Page 4 of 4 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra APPENDIX A PHOTOGRAPHS • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra NW d NE 3 a'N'?1 e 35 216P"4°N 81 771704'W t1C Oft ♦6r8ft o icy ..0♦ `- '" f 3� A •l ' ,,�'" ` . \ �tto 4� y�r ' '' � . 0 1 S-01 View of dispositioned seep location facing north. NW NE v.) I • 1?. • 1 • i.• 1 • 1 • 1 • 1 •j • I • 1 • I • I • 1 • v • 'N,81.768738°W±16 4ft A 694ft 'f `,"q p X •l e Via. * Y$' y '. 4 n ti A. fy, r A4 s a a .Ma:i#t .46:s S-02 View of SOC sample location facing north-northeast. Page 1 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra 4 .r, Decimal DMS Latitude 35.216137 35'12'58" N Longitude -81.758364 81°45'30"w U19 U&0'7(TIT u) 1.'_52{PM; S-03 View of seep location facing southeast. E S ISO,. 21 • 35.217594°N,81.752647°W*16.4ft ♦651f* 111 • • aFi n 1111111MINsw View of NPDES Outfall 104(S-04) facing Duncan 104 (S-04) southeast. Page 2 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra a.. W NW N N 093&14W(T) 36.218006°N,81.751076°W x32.8ft ♦679ft ! - r • 4 s"A ,r.. So! \ /14 11111 IS-05 View of dispositioned seep location facing north-northwest. NE E SE 30 90 ®74°E(T) 35.218292°N,81.748306°W 1.-16.4ft ♦678ft /yX f" b AS4? 1 • • � d r . y. 1114 S ,µ �„ 4a ,'T' '. Sf` '15F31t Yr 0 17:Q9-32 Outfall 106 (S-06) View of NPDES Outfall 106(S-06) facing east. Page 3 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra S I .. W o 223°SW(T) *35.218784°N,81.745682°W 1656.2ft A 686tt - • ti M -d `..� Ye,,-, 4� .q ;:..y .-. +x .- r ur •, . • :, , AOYY r ' � ,. --.,,,,,, '-�a s-7 „;- `' Y . .....•• ,:,, , . ....,•, ., .. -.., — :., ,....:, .„., , .y 3 ""_--'c',.- _ r 4fj',;,-, -' ' �° -:, ., - ,, 0 • `' ' , S-07 View of SOC sample location facing southwest. 10.01 - N _ ,. NE 0 31.)0 33G�-" 0 30 ®341°N(T) • 35.208508°N,81.756218°W±16.4ft A 754ft it P.*'"\* •'IV:** r, : Y • j M AI }.. :itita Sit I. *, • a titf �`A" 0.4$ ` . R . *Qt b 91rwN.+l� t �28" S-08 View of dispositioned seep location facing north-northwest. Page 4 of 20 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra 4 34' :: :1"kl!,-, ' ' . ° ' 4 Decimal D Latitude 35.217376 35°13'2' N Longitude -81.754172 81'45'15" W S-09 View of dispositioned seep location facing southeast. 1. -11 r } " Decimal DMS L. ,rude 35.210991 35"12'39" N f°E Longitu-le -8'1 767075 31°46'4" W S-10 View of dispositioned seep location facing north. Page 5 of 20 1 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra t ...1 lib t! l voma. - a.• .. Deci . Latitude 35.219549 S. N Longitude -81.756671 P1 , Of 5-1 1 View of dispositioned seep location facing northeast. 90 1 • 1 • 1 • 1 • 1 • 1 • 1 • I • I • I • I • k 0 32°NE(1-1 •35 217472°N,81 751839°W-.32 8ft ♦700ft i ' 4.4t 44' 14 i 1 i ilk VC -et.4"(,,411''',. '4,5;: 'NW -4':0.' '... ', et .c..4,...,.,,, , ,,,,-,,,,,,k,:, . ,..., P''''' "I'f r r 4 1 "ci* i ` Ir 2019,16.19:47 S-12 View of dispositioned seep location facing northeast. Page 6 of 20 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra , ,t \ + ,, ,,. mot"':7 4f,., -� D-;, , ��al Latitude 35.218257 35°13'5" N Longitude -81.754643 81°4516' W S-13 View of dispositioned seep location facing north. W NW N 2F0 3co to 0 30 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • I • 0 3291NW(T) •35 214615°N,81 755798°W±16 Oft A 688tt • e"" 4, ,:.: ...' -.4 „ , AO.W. if S j\ 1 I e ak S v 'Mar 2Q19, :38:42 S-14 View of seep location facing northwest. Page 7 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra W NW a;.! 270 3C 1,1 (T; • 15 11177'1'N 91?55 39''W1`:•16.1f• ♦6f317 °r off.« Tu t. X • 4 t Ztot1 ya7„1�1� i�. Y Z aw yq ; r View of location facingnorthwest. S15 seep W j NW _ N .40 170 IiQ 330 4 , I • I • l • I • I • I • I • I • I • I • l • • ) • 297°NW(T) *35.214207°N,81.756111°W±16.4ft ♦697ft r • Rn d � „ robir �t �f �g ft, ^mod -, / a — . . S 16 View of seep location facing west-northwest. Page 8 of 20 P • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra NE E ,E 0 75°E(7) 0 35.217281°N,81.769218°W±16.4ft ♦683ft t w. alkt t • a <Y , IL a t2 u A. L17 View of dispositioned seep location facing east. N ' ' „ .+"cr '' 4. f 7�(%1316 4ft A 66Th CAM.q . ::,, Fn4r....,F. -J.:N,14..• - • y y f S-18 View of seep location facing north. Page 9 of 20 r • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra W N t, it ' V Ic.... ,19 a 1.., .4 �.�' IS-19 View of seep location facing northwest. 11111111111.1.111. O 328'NW{T) 0 35.216499'N,81.769005 v". -_i c . a it ., Olt 1.**04:4 ,4 t 4 / "'.''-;41:-4114:14 *i*:'..t,•*l', • I. ii X . a e r _ I . .- i 11: k. Y. a „` . 4.4.,,-- .,. .. -r_ r-,,..i. ..e,-, .4tr• +.('' t ,A ,{ a iiff r r .°,,; /j _. k T / 1_ S-19A View of seep location facing northwest. Page 10 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra S SSW W ,c 14u '3218°S"''T'' • fir,°1.1 r ir,N Pi,a,qn?'tf/','P" ♦683ft a.: V. y•‘,.: _- p 4,r {,-x,idrs.... 4;It a a,..�t V}Yw . ,. « .+A:tom «^ , ~k' `'.,.< lb . } 1v . 011.E 5-20 View of dispositioned seep location facing southwest.Photograph taken after annual seep inspect wii W NV N 770 300 9:3.1 I • I • I • I • I • I • I • t • I • 1 • I • i • ; • 1 • *<?316°NW(T) *' % 35.214676°N,81.755936°W±16.4ft A 687ft e s?} 4 �,., 4. • _ .Ak { y.�. w 1 ., A E „1 w�A k P . , S-21 I View of seep location facing northwest. Page 11 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra E S . , . r . , . , . . . . • • • , • , . O 166°S(T) 0 35 13.102'N,81°44.896'W*16ft ♦651ft 4 'K Vipt k- ''' fir• . :... �� ,' _ ,�n-• View of dispositioned seeplocation facingsouth.Photograph taken P S-22 after annual seep inspection.Approximate abandoned pipe location indicated by red arrow. `rr•E SE S • t . 1 . 1 . 1 • 1 . i . ; • 1 • 1 • • 1 • I • 1 • 1 O 151°SE(1) #35.218113°N,81.750504°W±16.4ft ♦647ft 4-- 1 r x 1 r . S-23 View of seep location facing southeast. lar 2019 16°29.50 Page 12 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra SE S SW Q1•" (1) 0:4•.4. * ', 81.749466°W.164?t ♦6F°`, ti "f - i 1 11 S-24 View of dispositioned seep location facing south. O 82°E in •35 217522°N,81752243°W±16.4ft •706ft � T r ‘ . :5,, 4 r, ...:,,Ailk, , 11 1311 f , e►r , ti SO s�. T1 + } iif it _ ,dam•a - .,,7: ;', S-25 View of dispositioned seep location facing east. Page 13 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra likip Er It ..or ? t :—• . •' <r I: a o Decimal Di4'g Latitude 35.217384 35°13 N Longitude -81.754196 81°4515 tAi 2019-03-07(Thu) 02:01(PM) S-26 View of dispositioned seep location facing southeast. W NW N N: i • I • 1 • 1 • I • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 • 0 337°NW(T) ;•35.213703°N,81.756317°W±32.8tt ♦707ft e Y 0" jS_27 Vic., of seep location facing north-northwest. Page 14 of 20 I • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra paimik S W O 227"SW 9 . 20141 *16.4ft ♦737ft & '4w ' -28 , , iii +'11 • t;M i. Oro i ;.41 µiP it S-28 View of seep location facing southwest. 1 W NW , N '•270 ,mx, . 0 30 0 329°NW(T) • 35 211582°N 81 754021'W s184ft ♦712ft f. 1 . N *''t 41, ,;tee 7 � ' . , 5-29 View of seep location facing northwest. Page 15 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra S W . 0 228°SW(T) •35.21 ' . .81.754074°W±16.4tt A 746ft i S-30404 ` -. ..e :yio y y{..+� w, r , 3 rw , S-30 View of seep location facing southwest. NE E SE 1 1 i is O 111°E(T) $35.211536°N,81.753792°W±16.4ft ♦729ft ,. « 1 rr .+ S 31 .. 44+ e slit. P r P 14 � Aitit pt` � � F��y:Y.L � i 7. . Y .0 5. .` 1 ` 4 i „AD OA , I,.. 4,4, , ..,,, ,, ,i ,. „... S-31 View of seep location facing east. Page 16 of 20 • • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra E E SE S ' i • . • I • . .. • , • I • . , • , • i • t • , • i • 0116°SE(T) t•35.211273°N,81.753609°W±16.4ft ♦769ft S »v.� +"i 9•.. h am•. 1 �• i• '" a. \`,cif y 4 .. `6�R i ate « ^` � . ri r p� 1,4 rokt 4 r, . ;to,* 0 :,.. .,, y . ,, 06 NO2019,1 '' S-32 View of seep location facing east-southeast. A.O.W.. .,„ ., , , „,,,,,,,f, l,s, ,?,• ' , -k., .,,4 i 1 : . ,, z , +t z , ' `. 5-33 C Y A..(eA J fi a > ,r, any. `y o n :,,,"s• "*err" ^«... .. • ...! ,. Decimal DMS Latitude 35.21 323 35°13 5' N Longitude -81.754812 E1°45'17' ' y, 1 20i9O I.tt . 0141(PM S-33 I View of dispositioned seep location facing east. Page 17 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra ; . J '` dfr C.bliiit., 1n Decimal ' DMS Latitude 35.217666 35°13`3" N Longitude -81.753762 81'45'13'w S-34 View of dispositioned seep location facing southeast. N NE u 0 347.14(T) 0 35. .:. N,81.756195°W±16.4ft ♦781 ft yame. ` i x ' r f• 41 ac ♦ y 1 `„s c ? V f"_ 4 N Sr t S-35 View of dispositioned seep location facing north. Page 18 of 20 • 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra E . . . . . . . . . . . . . . `O oc°f! ^,"11(17^2°y Cr O .'lip1,, A -1• ' \ AriTtit. ;.0 1' , g. , a gar•• • ITT ' q yrr � itiy01,a . ry ' i: •• 1 J., ' ' ..f' t,, .! '3 ]y • 1 ` + , , 06 Mar 2019.10:42:08 S-36 View of seep location facing east. W NW i N N 270 310 s1 • 1 • 1 • 1 • 1 • 1 • 1 • 1 . 1 • 1 • 1 • 1 • 1 • 1 • 1 • O 335°NW(T) :•35.210270°N,81.753822°W±16.4ft ♦770ft 7 - * s,+ ..v . 4411* M 1, Mso i ➢: A� , 1 S-37 Viet, 11i seep location facing northwest. Page 19 of 20 f 2019 Annual Seep Report April 2020 Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra rvn.c w c.w J ivi. ,.„. ..., . _., . .; ,. , . Decimal DMS Latitude 35.217739 35°13`3' N Longitude -81.752471 81°45'8" W 5-38 View of seep location facing east.Photograph taken after annual see. inspection. Page 20 of 20