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Home My WebLink AboutNC0024406_Report_20190424 (2)DUKE ENERGY® April 24, 2019 Via Overnight Mail James Wells Vice President Environmental, Health and Safety Programs & Environmental Sciences 526 South Church Street Mail Code EC13K Charlotte, NC 28202 (980) 373-9646 RECEIVED/DENRIDWR APR 29 2019 Lon Snider Winston Salem Regional Office Assistant Environmental Regional Supervisor North Carolina Department of Environmental Quality Division of Water Resources 450 West Hanes Mill Road, Suite 300 Winston-Salem, NC 27105 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 18-004 Duke Energy Carolina, LLC — Belews Creek Steam Station NPDES Permit NCO024406 2018 Annual Seep Survey Report Dear Messrs. Snider and Sledge: Wa±per Resources Permitting Section On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Belews Creek Steam Station Annual Seep Report summarizing the findings of the comprehensive survey and to begin addressing decanting impacts on the seeps as required by the Belews Creek Steam Station Special Order by Consent (SOC), SOC No. S 18-004 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. Snider and Sledge April 24, 2019 Page 2 Please direct any questions concerning the Belews Creek Steam Station SOC No. S 18-004 to Joyce Dishmon at (336) 623-0238 and to Chris Hallman at (980) 373-7892 relative to the annual seep inspection report. jJamesells nt,Environment, Health & Safety- d Environmental Sciences Duke Energy Attachment: Belews Creek Steam Station 2018 Annual Seep Survey CC: Richard Baker, Duke Energy Joyce Dishmon, Duke Energy Chris Hallman, Duke Energy Brenda Johnson, Duke Energy Paul Draovitch, Duke Energy Matt Hanchey, Duke Energy L1p soynTerra 2018 ANNUAL SEEP REPORT BELEWS CREEK STEAM STATION EMC SOC WQ S18-004 3195 PINE HALL ROAD BELEWS CREEK, NC 28146 APRIL 2019 PREPARED FOR DUKE ENERGY CAROLINAS, LLC eL' DUKE ENERGY. CAROUNAS Erin N. Kio6y, EIT Project Engineer LO-L�-b- I IL4�--- CraigWdy, NC LL #1599 Project Manager Y 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra SECTION 1.0 2.0 2.1 2.2 2.3 3.0 TABLE OF CONTENTS INTRODUCTION .................... FINDINGS ................................ General Observations .......... Impact of Decanting ............. Changes to Seep Status........ RFFFRFNC'FS PAGE ..................................................................................1 .................................................................................. 3 .................................................................................. 3 .................................................................................. 3 .................................................................................. 3 ..................................................................................................... 4 LIST OF FIGURES Figure 1 SOC Locations and Inspection Areas LIST OF TABLES Table 1 SOC Locations and Descriptions-2018 Inspection LIST OF APPENDICES Appendix A Photographs Page i 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra LIST OF ACRONYMS AOW Areas of Wetness CCR Coal Combustion Residuals EMC Environmental Management Commission SOC Special Order by Consent Page ii 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra 1.0 INTRODUCTION On October 24, 2018, Craig Eady (NC L.G. #1599) of SynTerra inspected the Belews Creek Steam Station (Belews Creek or the Site) for existing and potential new areas of wetness (AOWs). The aforementioned activities were performed in accordance with North Carolina EMC Special Order by Consent WQ #S18-004. That Special Order by Consent (SOC) 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 of seeps must include identification of 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: • No previously unidentified seeps were observed during the inspection. • No notable changes to seep status were observed during this inspection. • Decanting had not begun at the time of this inspection. Page 1 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra Inspection Details Weather during and preceding the inspection was clear. Temperatures ranged from approximately 40 to 65 degrees F. No significant rain (>0.1 inch) occurred in the three days before the inspection according to the onsite rain gage. The inspector reviewed previous AOW inspection reports and the weekly dam safety inspection reports for each ash basin. Jeff Gately (Duke Energy system owner) conducted the ash basin dam safety inspections and prepared the reports. Mr. Gateley was interviewed concerning recent rainfall, construction/stabilization projects associated with the ash basins, and general site conditions in and around the ash basins. Observations from the dam safety inspection reports were consistent with observations made during the SOC inspection. The inspection included observations in the following areas, (Figure 1): • Along streams located between the Ash Basin and the Dan River • Along the Ash Basin Dam • Along the portion of the banks of Belews Reservoir nearest to the Ash Basin • Along streams located between Pine Hall Road and Belews Reservoir The inspection scope of work included a review of the areas identified as downgradient of ash basins. SOC locations are shown on Figure 1. Observations noted during the inspection are summarized on Table 1. Photographs of each seep location are included in Appendix A. Page 2 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra 2.0 FINDINGS 2.1 General Observations Inspection observations are shown for each seep in Table 1. Details include: • Flow conditions in the seeps and streams inspected were moderate Noticeable scour and sand/gravel deposits in the stream beds assumed to be related to the effects of recent hurricanes 2.2 Impact of Decanting Decanting of the ash basin at Belews Creek had not yet begun at the time of this inspection. 2.3 Changes to Seep Status Mr. Eady inspected each seep to evaluate whether it may 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. Seeps dispositioned during 2018 were done so at the time of the SOC issuance. Table 1 lists those seeps dispositioned and the basis for disposition. Seeps identified as dispositioned at Belews Creek are S-01, S-03, S-04, S-05, S-07, S-12, S-13, S-14, S-15 and S- 16. These dispositioned seeps will continue to be inspected and evaluated for any change in flow conditons. In general, there was no change in status of the dispositioned seeps and no change in status of remaining seeps observed during this inspection. Page 3 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra 3.0 REFERENCES North Carolina Department of Environmental Quality. (2018). Special Order by Consent EMC SOC WQ S18-004. Page 4 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra FIGURE d� i n `ram - `r I - �� //ryE��p�pry��GRAPHIC --^y �TLI IU .. CM E IN FEET lA9 RIVER STREET, SUITE 220 GREENVILLE. SOUTH CANOUNA 29601 DUKE PH oNE asaaz>9999 • � . I NERGY wN BY.BroDNG oME Daiuizo, _.-M-R C .. ,. -w i ONOUD BY L N6EY E�. LEGEND 4 NPDES CONSTRUCTED SEEP (APPROXIMATE) NPDES NON -CONSTRUCTED SEEP (APPROXIMATE) NON -CONSTRUCTED SEEP (APPROXIMATE) • DISPOSITIONED SEEP (APPROXIMATE) ♦ NPDES OUTFALL LOCATION (APPROXIMATE) ASH BASIN WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY LANDFILL BOUNDARY (CLOSED) STRUCTURAL FILL BOUNDARY (CLOSED) LANDFILL COMPLIANCE BOUNDARY DUKE ENERGY CAROLINAS BELEWS —� CREEK PLANT SITE BOUNDARY STREAM (AMEC NRTR) SPECIAL ORDER BY CONSENT (SOC) INSPECTION AREA - WETLAND (AMEC NRTR) 'MONITORED PER TERMS OF NIDES PERMIT. SPECIAL ORDER BY CONSENT (SOC) LOCATIONSARE DESCRIBED IN EMC SOC WO SIB-00<. NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) LOCATIONSARE DESCRIBED IN PERMIT NCO024406. NATURAL RESOURCES TECHNICAL REPORT (NRTR) WAS PREPARED BYAMEC FOSTER WHEELER INC.. JU LY 2. 1.16. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH -...-GUST 11, 201T IMAGE COLLECTED ON APRIL B, 2D11. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE BANE COORDINATE SYSTEM FIPS 0200 (NADICIL FIGURE 1 SOC LOCATIONS AND INSPECTION AREAS BELEWS CREEK STEAM STATION DUKE ENERGY CAROLINAS, LLC BELEWS CREEK, NORTH CAROLINA 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra TABLE TABLE 1 SOC LOCATIONS AND DESCRIPTIONS - 2018 INSPECTION BELEWS CREEK STEAM STATION DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC Facility Sample ID Location Coordinates Receiving Receiving Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection Latitude Longitude Waterbody Classification Flow via approximately 3 foot wide unnamed Steady clear flow. Clayey sandy substrate with no Belews S-01 * 36.293229 -80.085208 UT to the Dan River WS-V tributary to the Dan River, located northwest NA - Seep Dispositioned NA - Seep Dispositioned biofllm and evidence of orange aerobic bacteria of the active ash basin, west of Middleton staining. Loop. From sampling - No CCR impacts. Steady low flow. Significant leaf litter. No orange Seep to approximately 3.5 foot wide stream Monitoring at established pH 5-10 S.U. aerobic bacteria/floc/iron-oxidation on silty Belews 5-02 36.29689 -80.0844 UT to the Dan River WS-V channel, located northwest of the active ash Duke Energy 5-02 Hardness 200 mg/L substrate. Channel likely washed out due to recent basin. Stream Flows north to the Dan River. monitoring site storms. Plywood weir backed up with gravel/sand deposits. Flow via approximately 3 foot wide unnamed Flow is marginal. Water is clear. Minor amounts of Belews S-03* 36.298409 -80.0833 UT to the Dan River WS-V tributary to the Dan River, located northwest NA - Seep Dispositioned NA - Seep Dispositioned orange aerobic bacteria/floc/iron-oxidation of the active ash basin, west of Middleton apparent on substrate. Loop. From sampling - No CCR impacts. Flow via approximately 3 foot wide unnamed Muddy substrate with leaf litter and biofllm. Low to Belews S-04* 36.298015 -80.082127 UT to the Dan River WS-V tributary to the Dan River, located northwest NA - Seep Dispositioned NA - Seep Dispositioned stagnant conditions. Water is clear. Very little of the active ash basin, west of Middleton Floc/orange staining. Loop. From sampling - No CCR impacts. Flow via approximately 3.5 foot wide Some leaf litter in channel. Steady continuous unnamed tributary to the Dan River, located minimal flow of clear water. Minor amounts of Belews S-05* 36.300469 -80.080796 UT to the Dan River WS-V northwest of the active ash basin, west of NA - Seep Dispositioned NA - Seep Dispositioned orange aerobic bacteria/floc/iron -oxidation Middleton Loop. From sampling - No CCR apparent on substrate. impacts. Very low or stagnant conditions. Rivulets observed Monitoring at established pH 5-10 S.U. in water but Floating leaves did not Float Belews S-06 36.29615 -80.061 UT to Belews Lake WS-V Belews Lake (former ash basin Seep to UT to Belews Duke Energy S-06 Hardness 300 mg/L downstream. Minnows observed in water. No l channel). outfalmonitoring site. TDS 700 mg/L orange aerobic bacteria/floc/iron-oxidation on substrate. Low diffuse flow to a wetland area with initial Very low Flow through weir pipe. Orange aerobic Belews S-07* 36.287172 -80.0642 Charlie's Pond C flow to Charlie's Pond and ultimate discharge NA - Seep Dispositioned NA - Seep Dispositioned bacteria/floc/iron-oxidation apparent on substrate to Belews Lake. From sampling - No CCR and biofllm on water In stagnant area. impacts. Seep to approximately 4 foot wide stream Monitoring at established No biofilm or orange aerobic bacteria/floc/iron- Belews S-OB 36.27986 -80.0776 UT to Belews Lake C channel, located south of the Pine Hall Road Duke Energy pH 5-10 S.U. oxidation on substrate. Minimal leaf litter. Clear Ash Landfill. Stream flows south to Belews monitoring sisitete Selenium 10 pg/L low Flow. Gravel noted in substrate. Lake. Seep to approximate 2.5 foot wide stream Monitoring at point PH 5-10 S.U. Selenium 10 pg/L biofllm or orange aerobic bacteria/Floc/iron- Belews 5-09 36.280215 -80.072163 UT to Belews Lake C channel, located south of Pine Hall Road Ash downstream of confluence of Sulfates 600 mg/L oxixi dation on substrate. Significant leaf litter. Low Landfill and west of Structural Fill site. S-09 and S-16, prior to Hardness 500 mg/L clear flow. Stream flows south to Belews Lake. entering Belews Lake. TDS 800 mg/L Monitoring location about 500 feet below the pH 5-10 S.U. toe of the dam for the seep to approximately Monitoring at established Cadmium 2 pg/L 6 foot wide stream channel, just before the Duke Energy S-10 Chlorides 600 mg/L Orange aerobic bacteria/Floc/iron-oxidation on Belews S-10 36.299232 -80.075795 UT to the Dan River WS-1V stream joins a larger UT. Combined stream Mercury pg/Lmg/ substrate. Water is clear with moderate leaf litter. flow has confluence with ash basin discharge monitoring site. 60 Hardness 600 mg/L flow from concrete Flume structure. TDS 1200 mg/L SOC T.bl.._ALL _Finbl_2019_04_17 Peg. 1 d 2 TABLE 1 SOC LOCATIONS AND DESCRIPTIONS - 2018 INSPECTION BELEWS CREEK STEAM STATION DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC Location Coordinates Receiving Receiving Latitude Longitude Facility Sample ID Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection p Classification Constructed seep conveying toe drain Belews S-11 36.29859 -80.07571 UT to Dan River WS-IV discharge from dam via rip -rapped effluent NA - Monitoring Established me See page 5 of Attachment A Strong steady flow. Water is clear. No orange channel to unnamed tributary to the Dan per Terms of NPDES Permit of Belews Creek aerobic bacteria/floc.Iron-oxidation on ravel and g River. Document sandy substrate. Seep to natural stream in small valley east Belews 5-12* 36.2968 -80.0605 UT to Belews Lake WS•IV of active ash basin. Stream flows south into NA -Seep Dispositioned NA -Seep Dispositioned No flow. Orange staining observed on muddy UT to Belews Lake (former ash basin outfall substrate. channel). From sampling - No CCR impacts. Minor seep to small stream channel east of Belews S-13* 36.2925 -80.0617 UT to Belews Lake WS-IV active ash basin, located east of Pine Hall NA - See Dispositioned P p NA - See Dispositioned Stagnant water with leaf litter. Blofilm observed on Road. Stream flows south to Belews Lake. P positioned surface with orange aerobic bacteria/FloUiron- From sampling - No CCR Impacts. oxidation apparent on substrate. Minor seep to small stream channel east of active ash basin, located east of Pine Hall Black organic leaf material is apparent. No flow. 6elews S-14** 36,29221 -80.0624 UT to Belews Lake WS-IV Road. Stream flows south to Belews Lake. NA - Seep Dispositioned NA - Seep Dispositioned Siofilm and orange floc present on muddy No flow observed during most recent substrate. sampling events. Seep to small stream located east of S-10 and S-11 locations. Stream flow drains Belews S-15* 36,29927 -80.0754 UT to Dan River WS-IV north, joining other stream flows. Combined flow has confluence with ash basin discharge NA - Seep Dispositioned NA - Seep Dispositioned Low flow. Leaf litter present on sandy substrate, flow from concrete flume structure. From sampling - No CCR Impacts. Seep to small stream channel, located south Belews S-16* 36.27961 -80.0726 UT to Belews Lake C of Pine Hall Road, and west of Structural Fill NA - Seep Dispositioned NA - Seep Dispositioned Silty sandy substrate. Low clear Flow. Leaf liter and Iron site. Stream flows south to Belews Lake. oxide staining/ orange floc where flow appears From sampling - No CCR impacts. in channel. Small seep located downgradient from the toe of the dam, just west of the rip -rapped Moderate flow over clayey sand substrate with Belews S-18 36.29833 -80.07572 NA - Flows to effluent NA effluent channel. Flows from wetland area to NA - Monitored per terms of NA - Not a classified surface algae growth, biofilm, and orange aerobic channel for NPDES outfall effluent channel. This non -constructed seep the NPDES permit water. bacteria/floc/iron-oxidation. Hydrophilic vegetation flows to a portion of an NPDES wastewater observed in channel. treatment system. h.t= ' -Loudon previously investigated as a seep. Monitoring has not Indicated the pros of coal combustion ,,idoals. •• - Seep die, ad via repair and/or non -flowing condRion t, potantially reach Wotan of the U. S., or other, es noted. Moulton ii shall he conducted at the appnd l ,t, locations indicated on the attached site map. All monitoring shall be conduaed per the regulnments found In Attachment It of this Order. Ur - Unnamed Tributary Vg/L -micrograms par Ilter 26 - 15 NCAC 02L .0202 Standard CCR - Coal Combustion Residuals mg/L - mllograms par liter NA - Not Applicable ng/L - nanograms per Ilter NPDES - National Pollutant Discharge System S.U. - Standard Units SOC - special Ora, by Courant MS - Total OlseoNed solids Prepared by: la Checked by: QM SOC Tablas_ALL_Flnal 2019_W_17 Page 2 of 2 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra APPENDIX A PHOTOGRAPHS 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra S-01 I View of dispositioned seep location facing southwest 15-02 I View of SOC sample location facing southwest. 41 synTerra a;f . b- . 1 �✓ � .`N ; 1 � t � ,• • j Syr-. AV ye 4 it. ` Y s Y , m t Ar r r H a ��' � '`_ t �' ,,. ,ads•' - :i, yam.• ., _ °.'i 6. F I IL .4, lam a i 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra 0 synTerra •/ �'''rim' ' f �'Fny�l.�.li��t��a' �y��•"eJ +'_�i�Jri-• �_'�? r e 4 wT-Octooei 24, LU18 2018 Annual Seep Report April 2019 Belews Creek Steam Station, Duke Energy Carolinas, LLC SynTerra L0 synTerta